RotoWorld 2 2021

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ROTOWORLD ®

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VOLUME XVII, ISSUE 2 • 2021

VOLUME XVII, ISSUE 2 • JUNE-JULY 2021

MARKETS

Delivering proven performance so you can innovate with confidence.

ROTOPLAS 2021 is on!

Learn more about how we can work together to grow your business.

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

WWW.ROTOWORLDMAG .COM

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

Small acts of kindness at work benefit the giver, the receiver, and the whole organisation Alex Fradera

Case Study of a Long-Term Filled Industrial Storage Tank – Prediction at 20 years (Part 3) Eric Lainé, Jean-Claude Grandidier, Eric Maziers, Steve Lewis, Rua Woller, and Alistair Bell

IN LOVING MEMORY OF A GREAT MAN

It is with deep sorrow that we say goodbye to Tom Wyszynski: one of the warmest, brightest, and finest human beings we’ve ever had the pleasure of calling our friend.

To the Rotomolding community, he was a rockstar, and we are sure that he’ll be remembered as such. However, to us he was the guy who made this company a second family, who shared his great knowledge with humility, and whose contagious lightheartedness spread positivity through stressful times.

The childlike enthusiasm with which he met new challenges, the commitment and love with which he mentored his team, and the absolute dedication with which he sought perfection made it a true privilege to work with him and will continue to inspire us always.

We Miss You, Buddy

A Record Year

2020

We would like to take the time to thank our loyal customers after a record-breaking year of success in 2020! At a time of uncertainty and trials for many, Powder King® is so grateful to have received support from new and long-term customers. It is our mission to provide exceptional services to help advance the Plastics Industry. Here at Powder King®, we believe that having a foundation of integrity is a key asset, which we must preserve and enhance. Powder King® believes that with your support, we are able to carryout those standards and continue to produce record breaking success. We appreciate your valuable contribution and wish you a great year ahead.

www.powder-king.com • sales@powder-king.com • 623.551.9897

CONTENTS

FEATURES FEATURE STORY

38

ROTOPLAS 2021 is on!

Susan Gibson, JSJ Productions, Inc. Rotoplas is the largest exposition for the rotational molding industry, offering the latest in advanced technology, products, services, and innovative parts made specifically for the rotomolding process.

46

Case Study of a Long-Term Filled Industrial Storage Tank - Prediction at 20 years (Part 3) Eric Lainé1, Jean-Claude Grandidier1, Eric Maziers2, Steve Lewis3, Rua Woller4, Alistair Bell4 Institut Pprime, UPR3346 CNRS, ISAE-ENSMA, Université de Poitiers, F-86962 Futuroscope, France 2 Total Research & Technology Feluy, Zone Industrielle Feluy, B-7181 Seneffe, Belgique 3 Vision Plastics New Zealand Ltd, Silverdale, Auckland, New Zealand 4 Devan Plastics Limited, Judea, Tauranga 3110, New Zealand

1

The summary of work carried out by the authors over many years and which has been the subject of several presentations and scientific articles.

54

Small Acts of Kindness at Work Benefit the Giver, the Receiver, and the Whole Organisation Alex Fradera An uplifting new study looks at acts of altruism within a real-life working environment.

4 ROTOWORLD® JUNE-JULY 2021

www.rotoworldmag.com 5

CONTENTS

DEPARTMENTS 8 From the Publisher Susan Gibson, JSJ Productions, Inc. Opening Up!

12 Global Contributing Editors

Global Contributors, Department Contributors, and Issue Contributors

15 Upfront

Industry News, Trends, and Products

29 Design Comment

Michael Paloian, Integrated Design Systems, Inc. Root Cause Analysis – A Critical Design Skill

30 Travel Updates

International Travel During COVID-19

32 At Issue

NZ Gas Ban - A Wakeup Call for All Rotomoulders?

34 ARM Report

ARM Continues to Address Pandemic Issues

52 Industry 4.0

Rob Miller, Wittmann Battenfeld Canada Inc. / ROTOLOADTM Mold Use Intelligence

56 ARMO News

ARMA | ARM-CE | ARMSA | BPF | IT-RO | NORDIC ARM | StAR Welcome to ARMA Ltd

60 Global Calendar 62 Advertisers’ Index

6 ROTOWORLD® JUNE-JULY 2021

RotoSpeed Advantages

When Performance Counts...

➲ Proven Performance ➲ Lowest Cost of Ownership ➲ Leader for over 38 Years ➲ Highest Productivity, Durability ➲ Remote Ethernet Machine Support ➲ Automated Systems & Solutions ➲ Global Sales & Full-Service Support Team ➲ Over 1,400 Machines in Over 60 Countries ➲ Engineering, Manufacturing & Support from the U.S.A. ➲ Energy-Smart Machines, Fastest Oven Temp Recovery ➲ Leader in Process Control Systems; RotoCure, IRT & RotoLog

In-Stock Machines

Carousels

In-Line Shuttles

Rocking Ovens

Work Platforms

Mixers

Dispensing

www.ferryindustries.com • sales@ferryindustries.com Ph: +1.330.920.9200 • Fx: +1.330.920.4200 • 4445 Allen Rd, Stow, OH 44224 USA © 2021 Ferry Industries, Inc.

www.rotoworldmag.com 7

FROM THE

PUBLISHER Susan Gibson, JSJ Productions, Inc.

Opening Up! I along with our team at JSJ Productions and RotoWorld® are extremely saddened by the passing of our friend and colleague Tom Wyszynski. Tom has been involved in the rotational molding industry for too many years to count. He passed away suddenly on June 25. We, along with countless others within the industry have worked closely with Tom over the years on many varied projects. He served as a Department Editor for RotoWorld® for a time and offered much valuable information to our readers. Tom’s signature fun, kind, gregarious, but gracious presence can’t be replaced. His vast knowledge and grasp of the rotational molding industry and all its intricacies will be sorely missed. Our hearts go out to his beloved family and work colleagues. Personally, I will fondly remember our special friend Tom Wyszynski with a smile and a warm heart, and remain grateful that he passed our way. What a blessing…

Opening Up! While New York and California, among other states have lifted all coronavirus restrictions, we are seeing immense progress after months of devastating waves of the virus in the United States. As we wait to see how the current imposing variants of the virus play out in various parts of the world, we are pleased to see many of our meetings and conferences beginning to hit the calendar, and it feels so good.

Inside this issue we focus on the fact that Rotoplas 2021 is on! As the industry gathers once again in Chicago on September 21-23, it is going to be so great to see one another, and no doubt to celebrate the ability to do so. Be sure to read our cover story and get ready for the greatest trade show our industry offers.

Speaking of opening up, inside this great issue, our writers bring you valuable information and food for thought. The newest member of the RotoWorld® Editorial Board, Martin Coles, Matrix Polymers, provides a thought-provoking look at the New Zealand Gas Ban – and asks, Is this a wake-up call for rotomolders? Michael Paloian writes about the critical role of “Root Cause Analysis” as a design tool. ARM continues to address pandemic issues for its members.

Part 3 of the Case Study of a Long-Term Filled Storage Tank – Prediction at 20 years wraps up this important technical study that has been the subject of numerous presentations and scientific articles. Rob Miller delves into new territory by addressing how Industry 4.0 can be used to provide intelligence regarding mold use. Rob provides great insights and information to the industry as he addresses important questions posed to him by industry members. Keep these questions coming! ARMA has re-branded with a new name and look - ARMA Ltd. Read all about this in the ARMO editorial section as this combines with their new strategic direction.

As I mentioned earlier, the Global Calendar is starting to gain momentum. If you have event dates you would like to have included on the RotoWorld® Global Calendar, please send these our way. You can always reach out to us at susan@jsjproductionsinc.com.

Finally, please notice our announcement of the upcoming rbg! on page 17. Contact us today to ensure that your company and products are included in the premier annual Rotational Molding Buyers’ Guide – rbg! (print & online). It will be published in time for Rotoplas so don’t miss it!

Hoping to see many of you at Rotoplas in September!

Susan Gibson Publisher & Editor

8 ROTOWORLD® JUNE-JULY 2021

Some Things Just Stick PE and foam are not among these things.

J-Bond was developed for adhering Polyurethane foam to Polyethylene. It provides outstanding adhesive properties by forming a bond between itself and the insulating foam.

It’s not as natural as our friend here sticking to a tree, but J-Bond is about to make a huge impact in the world of demanding foamed applications like coolers!

Introducing

J-Bond

Functionalized Polyethelyne Resin

Stick with Jerico quality custom compounds!

Call or Click Today (330) 730-1140 info@jericoplastic.com

Proudly Supporting the Association of Rotational Molders!

Family-Owned and Operated Since 1997

Committed to Excellence in Rotational Molding

Phone (330) 334-5244 Fax (330) 334-9123

JericoPlastic.com info@jericoplastic.com

www.rotoworldmag.com 9

Susan D. Gibson

Publisher & Editor President - JSJ Productions, Inc. susan@jsjproductionsinc.com

Technical Editor Alvin Spence PhD MEng aspence@centroinc.com Process Editor Paul Nugent PhD MEng paul@paulnugent.com Michael Paloian

Design Editor President - Integrated Design Systems, Inc. paloian@idsys.com

Celal Beysel

Global Contributing Editors

Martin Coles

Chairman - Floteks Plastik beysel@superonline.com Matrix Polymers martin.coles@matrixpolymers.com

Adam Covington Mark Kearns Ravi Mehra

Ferry Industries acovington@ferryindustries.com

Moulding Research Manager m.kearns@qub.ac.uk

Managing Director - Norstar International LLC maramehra@aol.com

Advertising and Art Production Marketing/Advertising Director Jennifer Gibson Hebert Vice President, JSJ Productions, Inc. Chief Art Director Anya Wilcox

jennifer@jsjproductionsinc.com

JSJ Productions, Inc. awilcox@designintersection.com

Circulation & Distribution Administration Sheryl Bjorn JSJ Productions, Inc. sheryl@jsjproductionsinc.com -

Editing & Translations Suzanne Ketron | Oliver Wandres | Sheryl Bjorn Website & Online Technology Jason Cooper JSJ Productions, Inc. jason@bound.by RotoWorld® is a JSJ Productions, Inc. Trade Publication JSJ Productions, Inc. 625 West Market Street, Salinas, CA 93901 Phone: (512) 894.4106; Fax (512) 858.0486 Email: rotoworldmag@rotoworldmag.com and Website: www.rotoworldmag.com Subscriptions One-year subscription (six issues), print or digital, $60 US, $90 Canada/Mexico, $135 All Other Countries.

To subscribe or to submit change of address information, call us at (512) 894.4106; fax us at (512) 858.0486; visit us online at www.rotoworldmag.com; or email us at sheryl@jsjproductionsinc.com.

You may also write to RotoWorld® Subscriptions, JSJ Productions, Inc., 625 West Market Street, Salinas, CA 93901 Advertising For information on advertising, please contact Advertising Director Jennifer Gibson Hebert, JSJ Productions, Inc. Email Jennifer Gibson at jennifer@jsjproductionsinc.com Letters We welcome letters about our contents. Write Letters to the Editor, JSJ Productions, Inc., 625 West Market Street, Salinas, CA 93901 512.894.4106 phone 512.858.0486 fax, or Email susan@jsjproductionsinc.com.

Editorial Queries We consider unsolicited contributions.

Send manuscript submissions as email attachment to Susan Gibson at susan@jsjproductionsinc.com.

JSJ Productions, Inc. bears no responsibility for claim or factual data represented in contributed articles.

Postmaster Send changes of address to RotoWorld®, JSJ Productions, Inc., 625 West Market Street, Salinas, CA 93901 RotoWorld® is a JSJ Productions, Inc. independently owned, bi-monthly trade magazine for the international rotational molding and plastics design industries. JSJ Productions, Inc. owns all copyrights on articles published herein unless ownership is otherwise stated.

Reproduction of this magazine, in whole or in part, without the express written p ­ ermission of the publisher is not permitted.

10 ROTOWORLD® JUNE-JULY 2021

Your partners in rotational moulding The Rotational Moulding Experts: • Polyethylene Granules & Powders • Polypropylene Granules & Powders • Crosslink Polyethylene • Polyamide Powders

• • • •

Ancillary Products Technical Support & Advice Multi-lingual Customer Service Global Supply

UK | Poland | India | Malaysia | Australia | New Zealand sales@matrixpolymers.com technical@matrixpolymers.com

matrixpolymers.com

CONTRIBUTING

EDITORS ROTOWORLD ®

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VOLUME XVI, ISSUE 1 • 2020

VOLUME XVI, ISSUE 4 • 2020

“If you build it, they will come”

Delivering proven performance so you can innovate with confidence.

Brian Olesen, Centro Inc., President & CEO

Viscosity and Melt Index

The Use of Virtual Reality in the Development of a New Rotational Moulding Factory

Alvin Spence, Centro, Incorporated

ogo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

Delivering proven performance so you can innovate with confidence.

Learn more about how we can work together to grow your business.

WWW.ROTOWORLDMAG .COM

During a Pandemic

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

CONVERSION

Maintaining healthy reputations

StAR 2020, 16th Conference & Roto Show A Great Success

Getting HR Right

Independent Contractor? Or Employee?

Simulating the Rotomolding Process

What it can Mean for the Molding Industry

ARMO Showcase

Coming 2020-2021 Issue

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

Susan Gibson, JSJ Productions, Inc.

DESIGN

WWW.ROTOWORLDMAG .COM

Delivering proven performance so you can innovate with confidence.

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

2020 ARM Annual Meeting Online

Karem Akoul, Peter Ross, Brian Allen and David Seall CP Cases, London; Mark Kearns and Dr. Peter Martin, Queen’s University, Belfast

VOLUME XVI, ISSUE 3 • 2020

Rotomoulding’s Fight Against COVID-19

WWW.ROTOWORLDMAG .COM

Dr. Nick Henwood, Rotomotive Limited

VOLUME XVI, ISSUE 3 • MAY-JUNE 2020

VOLUME XVII, ISSUE 6 • DECEMBER 2020-JANUARY 2021

LEADERSHIP

WWW.ROTOWORLDMAG .COM

Shift to Digital Need to Know about Michelle Rose, ARMA Polymer Chemistry

Celal Beysel, Floteks Plastik, Turkey

VOLUME XVI, ISSUE 2 • 2020

From Zeros to Heroes MARKETS

ARMA Rotoconnect’s What Rotomolders

3 WAYS THE CORONAVIRUS VIRUS IS CHANGING WHO WE ARE

FOR A MORE SOPHISTICATED, CONVENTIONAL ROTOMOULDING INDUSTRY

MANUFACTURING

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VOLUME XVII, ISSUE 6 • 2020/2021

Influence Material Selection

Rob Miller, Wittmann Battenfeld Canada Inc. / ROTOLOADTM

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

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TECHNOLOGY

Put Your Money...

Where Your Delivering proven performance Money is! so you can innovate with confidence.

VOLUME XVI, ISSUE 5 • OCTOBER-NOVEMBER 2020

Rotoculture takes roots

Learn more about how we can work together to grow your business.

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in Indian 625 West Market Street Agriculture…

Salinas, CA 93901 USA Sunil Raithatha, Prashant Trivedi & Umakant Savadekar

gin with the quality and n supply. Start your day with hat help leading rotomolders ality. Accomplish more with e sales support and expert

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Making a Quantum Jump

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en performance ovate with confidence.

ow your

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Delivering proven performance so you can innovate with confidence.

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U.S. ROTATIONAL MOLDING: THE ROAD AHEAD Future trend of growth in the u.S. And global economies in a time of pandemic.

THE SEVEN SIMULTANEOUS STAGES OF ROTATIONAL MOULDING

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

Andrea Lekushoff, Broad Reach Communications

rotomolding:

The Next 10 Years Paul Nugent, MNOP

Part 1: MACcreeP

of Rotomolded Polymer Structures

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

Learn more about how we can work together to grow your business.

Eric Lainé, Eric Maziers, Jean-Claude Grandidier

WWW.ROTOWORLDMAG .COM

Learn more about how we can work together to grow your business.

WWW.ROTOWORLDMAG .COM

Your rotational molding capabilities begin with the quality and dependability of your polyethylene resin supply. Start your day with PE products and process innovations that help leading rotomolders bring their most complex designs to reality. Accomplish more with our reliable supply network, responsive sales support and expert technology team.

The Power of Pigment

A Study of Dry Blending

Succeeding in Uncertain Times

Consider how humans perceive the future

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

© 2016 Exxon Mobil Corporation. All rights reserved. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and all product names herein are trademarks of Exxon Mobil Corporation.

DESIGN EDITOR

TECHNICAL EDITOR

Michael Paloian

Alvin Spence

Michael is President of Integrated Design Systems, Inc., Great Neck, New York. Over the past 25 years, Mike has developed a broad range of plastic products utilizing various processing methods including rotational molding. Mike’s B.S. degree in Plastics Engineering and Masters in Industrial Design, combined with his extensive experience, has formed the basis for his branded and unique insights into the field of plastics part design. paloian@idsys.com PROCESS EDITOR

Alvin Spence is Vice President Engineering at Centro, Inc., North Liberty, Iowa. He provides leadership for Centro’s product development team and quality resources. Alvin received his Bachelor’s degree in Mechanical & Industrial Engineering and PhD from Queen’s University Belfast. aspence@centroinc.com

CONTRIBUTING EDITOR

Paul Nugent Paul is a consultant who travels extensively across six continents assisting clients in many roles from training to expert witnessing.

He received his Eng. degree in Aeronautical Engineering and Ph.D. in Mechanical Engineering from The Queen’s University of Belfast. Paul developed the Rotolog system, the first complete computer simulation (RotoSim), and authored a book entitled Rotational Molding: A Practical Guide. paul@paulnugent.com

12 ROTOWORLD® JUNE-JULY 2021

Celal Beysel Celal is Chairman of Floteks Plastik, the pioneer and innovative leader of the rotational molding industry in Turkey and a Global Contributing Editor for RotoWorld® magazine.

Being an ARM member for more than 20 years, he has made many presentations at ARM meetings in various countries. He is also active in business and political organizations in his country. Celal has authored numerous articles published in various newspapers and magazines about politics, plastics, rotomolding, and innovation. beysel@superonline.com

CONTRIBUTING

EDITORS

CONTRIBUTING EDITOR

CONTRIBUTING EDITOR

Ravi Mehra

Martin Coles

Ravi Mehra has been associated with the rotational molding industry since the early 1970’s. He is a Past President of ARM – Association of Rotational Molders, and has been inducted into the ARM Hall of Fame. He is the Founding Chairman of StAR – the rotational moulding Trade Association of India. He was the Chairman of ARMO – Affiliation of Rotational Moulding Organizations from 2012 to 2014. He consults internationally with companies in the rotational moulding arena to help their global strategy, facilitate technology tie-ups, and business alliances. maramehra@aol.com

Martin Coles co-founded Matrix Polymers 28 years ago and is the company’s largest shareholder and Managing Director. Shortly after graduating from London University he began his career in the plastics industry working for a major Italian petrochemical producer and soon became hooked by the unique world of rotomoulding. Matrix Polymers has evolved to be a global supplier specialising on rotomoulding materials and has compounding and grinding plants in the UK, Poland, Australia, New Zealand and Malaysia. The company sells more than $100 million of rotomoulding materials each year and has 180 employees. martin.coles@matrixpolymers.com

CONTRIBUTING EDITOR

CONTRIBUTING EDITOR

Mark Kearns

M.Kearns@qub.ac.uk

Mark is the Rotational Moulding Research Manager of the Polymer Processing Research Centre at Queen’s University of Belfast. He is a Chartered Chemical Engineer with a M. Phil Degree in Rotational Moulding. Mark manages rotational moulding research and development projects for companies across Europe, Australasia, and North America.

Adam Covington Adam Covington is President of Ferry Industries, Inc. in Akron, Ohio U.S.A. Covington has been with Ferry Industries for over 11 years, advanced through the manufacturing, engineering, sales and service positions within the company and was appointed President in 2019. Adam strives to find solutions for customer’s needs and advance machine technology for the rotomolding industry. He is a graduate of Ohio University’s Russ College of Engineering and Technology with a bachelor’s degree in Industrial Technology. acovington@ferryindustries.com

DEPARTMENT EDITOR

Rob Miller Owner President – Wittmann Battenfeld Canada Inc. Rotoload Rob started in the plastics pneumatic conveying industry in 1986.

He has spent his entire career developing, engineering, and designing all types of catalog, standard, and custom pneumatic conveying systems for the plastics industry. He started in the Rotational Molding Industry in 2013, and has enjoyed learning the idiosyncrasies of the industry and market, and most of all meeting the people and building relationships for the future.

Rob.Miller@wittmann-group.ca www.rotoworldmag.com 13

GUEST CONTRIBUTING

EDITORS

Eric Laine

Eric Maziers

Eric Lainé is a research engineer at the Institut Pprime (UPR CNRS/ISAE-ENSMA/University of Poitiers, France) in the Physics and Mechanics of Materials department (ISAE-ENSMA, France). He holds a PhD in mechanics from the University of Poitiers (France). Eric works in the field of elastomers, polymers and composites, from testing to numerical simulation, and from laboratory samples to industrial structures. The research themes are diffuso-thermomechanical coupling (CO2, H2), rapid decompression, and modelling of non-linear behavior of materials. He collaborates with Professor J.C. Grandidier for more than 20 years in research, and more than 15 years with Eric Maziers on the characterization of rotomolded polymers.

Eric Maziers is specialist for the Rotomolding Technologies for the polymer business inside Total Company. He has obtained his degree of Chemical Engineer in the high Engineering School of Liège Belgium.

He has been heading R&D projects for polyolefin and biopolymers developments for more than thirty years. During the last year he has been focused on metallocene based polyolefins. He also participated as guest speaker in different “Hands-On” Advanced seminar in rotational moulding application. He has published more than forty papers in international conferences and journals. He has been involved in many patent fillings. More recently the rotomolding specialty compound business of Total was integrated into the automotive business unit in Low Carbon Solutions Division at Total Polymers.

Jean-Claude Grandidier

Jean-Christophe Dupré

Jean-Claude Grandidier is a professor at ISAE-ENSMA, an engineering school in Poitiers (France). J.-C. GRANDIDIER holds a PhD in Mechanics of Materials and Structures from the University of Metz (France) and a master’s degree in Mechanical Systems Technology from the Pierre and Marie Curie University of Paris – ENS Cachan (France). He was Director of the Laboratory of Mechanics and Physics of Materials (UMR CNRS/ISAE-ENSMA) and then Deputy Director of the Institut Pprime (UPR CNRS/ISAEENSMA/University of Poitiers, France), in charge of the EQUIPEXGAP experimentation platform.

Jean-Christophe Dupré is CNRS researcher at the Institut Pprime (UPR CNRS/University of Poitiers/ISAE-ENSMA, France) in the team PEM (Photomechanics and Experimental Mechanics) of the Mechanical Engineering and Complex Systems department.

His field of research concerns the development of non-contact technique in 2D, 3D (surface), and 3D in the core of specimens.

This research allows him to study mechanical structures (from biomechanics to industrial structures to cultural heritage structures). He has been working with Jean-Claude Grandidier and Eric Lainé for several years on different experimental subjects concerning the mechanical characterization of 3D structures.

CNC Molds YEARS STRONG

Fabricated Molds

14 ROTOWORLD® JUNE-JULY 2021

1939-2020

Cast Aluminum Molds

UPFRONT MAAG Reduction Celebrates the Production of 1000th Pulverizer Machine

OBERGLATT, SWITZERLAND — Recently marked a

prominent milestone for MAAG Reduction, a global provider of plastics and chemical processing equipment, as its 1000th Pulverizer has shipped. Reduction Engineering, acquired by MAAG Group a few years ago, started production of pulverizers in 1994 at its location in Kent, OH. Pulverizers are used throughout the plastics industry to create polymer powders with a highly defined particle size distribution. These powders are commonly used in rotomolding. Pulverized plastics are used to manufacture a wide range of products from household goods and outdoor equipment to recycling containers.

“This milestone is a great achievement for our MAAG Reduction team,” said Martin Baumann, VP MAAG Americas.

“This is a testament to the quality and value our pulverizers

have brought to the hundreds of satisfied customers. Our team is committed to the product and eagerly looking forward to building the next thousand.”

“While we are celebrating the installation of our 1000th Pulverizer, the #1 unit from 1994 is still in production with more than 175,000 production hours,” added Rommel MayerRodriguez, GM of MAAG Reduction, Inc. “While we continue to innovate to improve the pulverizing process and reduce costs for our customers, we still focus on the reliability and performance that began with unit #1.”

According to the MAAG Pulverizer Business Lead, the pandemic did not slow pulverizer sales, but on the contrary, the MAAG Reduction production facility in Kent has added more people to the team to meet production needs. www.rotoworldmag.com 15

UPFRONT Emerson Launches Unique Heat Staking Technology to Meet Growing Demand for Complex Plastic Parts Branson™ GPX platform provides greater design freedom by enabling high-quality joins and superior aesthetics in a range of challenging applications

ANBURY, CT, USA — Emerson has introduced new heat

staking technology designed to give manufacturers greater design freedom by enabling them to join more complex, delicate, and sensitive components to plastic moldings. Using a unique pulse staking technology that optimizes the heat staking process, the Branson™ GPX platform produces high-quality joins, superior product aesthetics, and energy savings in increasingly challenging applications.

Electronics, automotive, and medical device manufacturers must produce more creative designs to meet rapidly changing market demand. This has led to an increase in challenging heat staking applications involving parts with more complex 3D geometries, closely aligned features and fragile or heat-sensitive components, such as soldered components or sensors, and using a greater number of blended, glass-reinforced, chromed, and metallicized plastics.

The Branson GPX platform uses PulseStaker technology to provide instantaneous heating and cooling, with adjustable cycle times for optimized, low energy heat staking. The process creates 16 ROTOWORLD® JUNE-JULY 2021

no particulates or burn marks, and enables more delicate and sensitive parts, such as those with embedded electronics, to be joined with consistently high-performance finishes.

The advanced technology is suitable for all heat staking applications, including those with thermoplastic materials and metalized coated parts. A wide range of heat staking tip designs, which can be adapted to meet any stake welding requirement, and the ability to stake multiple points simultaneously, provides manufacturers with greater design freedom.

“The automotive, electronics, and medical industries require more complex, delicate, and sensitive components to be joined to plastic moldings,” said Priyank Kishor, global product manager for Branson products at Emerson’s Automation Solutions business. “The unique heat staking process that the Branson GPX platform provides helps to meet this demand and offers manufacturers a broad range of benefits, such as superior product aesthetics and reduced energy use.”

For more information on the Branson GPX platform, visit www.Emerson.com/Branson.

RGB! 2021 RotoWorld® Buyers’ Guide Get on the list!

Place your company, products, and services in print & online before the global Rotational Molding industry in the exciting all new annual rbg!

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UPFRONT Indoplas, Indopack, and Indoprint Rescheduled to October 2021

The next edition of Indoplas, Indopack, and Indoprint, the Indonesian International Plastics, Packaging, and Printing Exhibition, will now be held from October 13 – 16, 2021 at the Jakarta International Expo (JIExpo) in Indonesia. The event was originally scheduled for August 2021. The country’s leading trade fair, focusing on innovative technologies and solutions from the plastics, packaging, and printing sectors, is jointly organized by Messe Düsseldorf Asia and WAKENI. Messe Düsseldorf Asia is a subsidiary of Messe Düsseldorf in Germany, renowned as the organizer of the No.1 international trade fairs for plastics (K), packaging (interpack) and printing (drupa).

Gernot Ringling, Managing Director of Messe Düsseldorf Asia, stated: “This international trade fair is renowned for its wealth of products and services on the show floor, first rate line-up of conferences and seminars, and unique platform for networking. With the ongoing uncertainty concerning Indonesia’s domestic border openings and restrictions on international travel and large-scale events, we feel a reschedule was necessary in order to meet the standards of a quality trade exhibition. We hope that moving the exhibition to October 2021 will give greater market confidence and optimism and provide more time for participants to make preparations. The October dates will also ensure better returns on investment and marketing value for exhibitors and visitors.”

Rini Sumardi, Director of Wahana Kemalaniaga Makmur, PT (WAKENI), added: “In these evolving and dynamic times, adaptability and flexibility are key and we strongly feel that the 18 ROTOWORLD® JUNE-JULY 2021

Indonesian market will be better positioned to do business and manage large-scale events safely and successfully in October. We remain committed to meet the business needs of our industry partners, exhibitors, and trade visitors, and will stay steadfast in nurturing these trusted relationships for an even more successful participation in October. We will continue to work closely with our participants and are taking immediate steps to provide the required support.”

For further information on visiting or exhibiting at Indoplas, Indopack, and Indoprint 2021, contact Messe Düsseldorf North America; Telephone: (312) 781-5180; E-mail: info@mdna.com; Visit https://www.indoprintpackplas.com/ and www.mdna.com; Follow us on twitter at http://twitter.com/mdnachicago

UPFRONT Pennsylvania College of Technology offers Plastic Materials, Processing, and Testing WILLIAMSPORT, PA, USA — Whether you are new to

plastics, work in accounting, sales, human resources, or want to learn about the plastics industry - this class is for you. Plastic Materials, Processing, and Testing will be offered on July 20-22 (Tues. – Thurs.) from 8:30 a.m. to 4:30 p.m. by instructor Joshua Rice.

You’ll learn the fundamental concepts, including testing and characterization, and get to visualize all types of plastics processing in an unintimidating setting. This class also provides an excellent networking opportunity. Hands-on labs include: • Extrusion: Twin-screw compounding • Injection Molding: Process demonstration, molding tensile, and flexural bars • Materials Testing: Density, Izod impact, tensile, and identification of an unknown polymer • Thermoforming: Tooling overview, demonstration, and process techniques • Blow Molding: Stages and types, equipment, molds, operation, and finishing • Rotational Molding: Process demonstration, and rotomolding with internal air temperature

Here is a testimonial from our last class held: “This course is worth every penny. This course provides great coverage of the industry in general, but is more in depth than I expected. The willingness of staff to go deeper with questions posed to them takes the group to the next level. Plenty of group interaction with staff.” Justin Geisinger, owner, Ag Plastic Solutions LLC, Orrstown, PA. For more information contact JoAnn Otto, PIRC Assistant, Plastics Innovation & Resource Center, PENNSYLVANIA COLLEGE OF TECHNOLOGY, One College Avenue, Williamsport, PA 17701, Tel 570.321.5533.

www.rotoworldmag.com 19

UPFRONT MAAG Group x6 class melt pump technology for production of bioplastic PLA OBERGLATT, SWITZERLAND — How to handle plastic

waste and the reduction of CO2 emissions are two of the most important topics our society will be dealing with for the next decades to come. MAAG Group is proud to have supplied its latest state of the art x6 class melt pump technology for the first fully integrated sugar-to-PLA (polylactic acid) plant in China. The plant is based on a Sulzer technology and key equipment for converting lactide into PLA. The lactic acid and lactide production are made from sugars (in this case won out of locally grown corn). Not only is the plant reducing the carbon footprint because of using plant-based resources instead of hydrocarbons, by using MAAG Group’s x6 class gear pump technology, the specific energy requirement is optimized furthermore.

MAAG Group’s pumps are used in the polymerization reaction stage, making sure that the efficient Sulzer SMRTM reactors are working smoothly in all operating conditions. But they are also used in the devolatilization stage, where a minimum level is required when unreacted lactide is removed from the PLA melt to achieve a good product quality. In the last stage, MAAG Group’s melt pumps are used to build up the necessary pressure to process the melt through the downstream equipment, up to the underwater pelletizer.

MAAG Group’s x6 class melt pump technology key feature is the reduced backflow to lower the energy consumption. The x6 class melt pump helps to save up to 50% energy and reduces material recirculation in the pump of about 50%.

While the reduction of 50% of energy is possible in exceptional cases and in extreme operating conditions only, the trend is true for all the applications when MAAG Group’s x6 class technology is used. With the energy saving, also the CO2 footprint is reduced. But x6 class pumps offer far more than that. The high efficiency of the pumps is offering a wider operating range as compared to other state of the art technologies. It allows, for example, that low viscous pre-polymer can safely be processed through the Sulzer plug flow reactor when the polymer conversion is progressing, and the viscosity is continuously increasing in the same. The high efficiency of the x6 class technology keeps the bearing temperatures lower than in former pump technologies, always allowing a stable film of polymer, lubricating the turning shaft. The favorable shaft geometry, where the length over center distance ratio has increased, allows the operation of extraction pumps at a lower fill level than it was ever possible before at a given connection size to the vessel.

Only like this the PLA can fully be concentrated. But also, the reliability has increased. Not only are the bearing surfaces almost 30% bigger, providing a better cushioning, but the pump is also working with bigger gaps, allowing potentially small foreign particles entering the system to pass the pump easier without damaging it. The x6 class pumps are the perfect fit for a modern, sustainable plant producing bioplastics.

Worldwide Plastics and Rubber Industry Focuses on K 2022 As exhibitor registration for K 2022, The World’s No. 1 Trade Fair for Plastics and Rubber closes, it is evident that exhibitor interest continues unabated. “K 2022 will again occupy the entire fairgrounds.

When talking to exhibitors we feel that there is an enormous demand for personal exchange on a global level,” stated Erhard Wien Kamp, Managing Director at Messe Düsseldorf.

K will take place from October 19 – 26, 2022 at the fairgrounds in Düsseldorf, Germany.

K 2022 will again welcome the “Who’s Who” of the international plastics and rubber industry. Some 3,000 companies from all continents have registered to exhibit their innovations in the segments: • Raw materials, auxiliaries • Semi-finished products, technical components, and reinforced plastic products • Machinery and equipment for the plastics and rubber industry K provides the global plastics and rubber industries with their most important information and business platform. This is where exhibitors and visitors from all over the world get together to demonstrate the 20 ROTOWORLD® JUNE-JULY 2021

industry’s capabilities, discuss current trends, and set the course for the future. K 2022 comes at just the right time to give the plastics and rubber sector renewed orientation after the changes caused by the COVID-19 pandemic.

K is not only the venue for groundbreaking new products every three years, but also underscores its special status by addressing the current challenges of our time and especially of its industry. This is reflected above all in the three major key themes of K 2022: • Circular Economy • Digitalization • Climate Protection These leading themes will be reflected by the exhibitors’ presentations and will also be the focus of the official special show “Plastics Shape the Future”, the Science Campus and VDMA’s Circular Economy Forum.

For hotel and travel information, contact TTI Travel, Inc. at (866) 674-3476; Fax: (212) 674-3477; E-mail: info@ttitravel.net; www.ttitravel.net

UPFRONT New Zealand told to ban imports of fossil fuel vehicles NEW ZEALAND — The New Zealand government has been

told it needs to do more to achieve its greenhouse gas (GHG) emissions reduction targets, with a recommendation to ban the import of gasoline- and diesel-fueled cars between 2030-35 and switch to electric vehicles (EVs).

“The government must pick up the pace, and it will not meet its targets without strong and decisive action now to drive lowemissions technology and behavior change across all sectors,” the country’s Climate Change Commission (CCC) said. The CCC was created in 2019 with the passage of the zero-carbon legislation in 2019 to commit the country to net-zero GHG emissions by 2050.

“Priority areas for action include increasing the number of EVs on New Zealand’s roads,” the CCC said. Transport emissions in 2018 made up 36.3pc of total net GHGs of 45.7mn t of carbon dioxide equivalent (CO2e). New Zealand’s gross GHG emissions in 2018 were 78.9mn t of CO2e, with the difference between net and gross GHGs reflecting the removal of emissions through forestry.

“We want to see the majority of the vehicles coming into New Zealand for everyday use electric by 2035. The government will need to provide support and incentives to make this happen,” the CCC said. New Zealand has no domestic auto production industry.

Its oil product consumption was 130,000 b/d in the July-September quarter last year, according to government data. The country’s sole refinery, the 135,000 b/d Marsden Point, is currently considering converting to a product terminal.

Heat, industry, and electricity emissions made up 41pc of total GHGs in 2018 or around 18.8mn t of CO2e, the CCC report said.

Low and medium temperature heat in industry and buildings could be decarbonised by 2050 through a switch away from coal, diesel, and gas to electricity and biomass. The CCC’s analysis indicates that these costs could range up to NZ$250/t ($180/t) of CO2e reduced.

Emissions from international aviation and shipping are not currently part of the 2050 emissions reduction target for New Zealand. The CCC will review whether these should be included in the 2050 target in 2024.

“We have tested to make sure that our path could allow New Zealand to meet the 2050 net-zero long-lived gas emissions target including international aviation and shipping emissions in case a decision is made in future to include these in the 2050 target,” it said.

“The New Zealand government plans to strengthen its nationally determined contribution to meet its obligations under the 2015 Paris Climate Agreement,” said New Zealand prime minister Jacinda Ardern. CCC advise was open for consultation until 14 March and the final advice released before May, said New Zealand Climate Change Minister James Shaw. The government will respond with an emissions reduction plan before the end of the year.

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www.rotoworldmag.com 21

UPFRONT Manufacturers in Rotomolding Market Keen on Boosting Sustainability Quotient by Adopting Bioderivative Materials, Cost-effective Products Becomes Priority ALBANY, NY, USA — Rotational molding technologies are

used to manufacture plastics for a wide spectrum of applications.

Key thermoplastics used in the process are polyethylene and polypropylene. The growing use of new technologies and instrumentation such as 3D (Dimensional) CAD (Computer Aided Design) design has helped companies in the rotomolding market to develop cost-effective products at scale. Key applications where rotomolding products find widespread use are water treatment, agriculture, and construction industry.

Emerging applications include automotive, toy making, and material handling. Sustainable production practices will likely shape the contours of the rotomolding market in coming years.

The global market is projected to clock CAGR of ~6% during 2020-2030, and surpass valuation of US$ 7.7 Bn by the periodend. The versatility of plastic rotational molding is a key trend that will drive the demand in several applications where plastics are used.

Key Findings of Rotomolding Market Study Companies Diversifying Their Activities Against COVID-19 Shocks In the backdrop of large outbreaks of COVID-19 especially in 2020, companies in the rotomolding market have been consolidating their efforts in applications that need urgent attention. They are thus keen on offering rotomolded products to customers to meet the applications of sewage treatment, medical sector, and traffic management. The shift has helped them maintain their business agility and bottom line. Further, they are focusing on selling cost-effective products to their B2B clients.

Players Leaning Toward Biodegradable Products One of the key trends that have gathered steam among manufacturers of rotomolding is the focus on developing sustainable products. Thus, the rotomolding market has witnessed the demand for products made with biodegradable resins and use of more bioderivative materials. These will also help project the image of these companies as socially and ecologically responsible brands. Stakeholders are also investing sizably in plastic recycling infrastructure to this end. The trend will retain its lustre in coming years as well. However, there is a major challenge of the limited choice of raw materials.

Since rotomolding involves intensive thermal processes, mostly poly based resins have been used. New technologies have thus come to the fore to meet these operational challenges for manufacturers. In an attempt to meet the customization need of the manufacturing process, mold pressurization process has been extensively studied among researchers, for instance.

22 ROTOWORLD® JUNE-JULY 2021

Custom-Made Rotomolded Products to Gain Traction In many new or emerging markets, particularly India, there is a proliferation of demands for custom-made rotomolded production.

The processing techniques are widely being used in making products such as fuel tanks, chemical tanks, and thermoplastics for solid waste management applications. Also, the demand for rotomolding with remarkable durability, color-fading resistant, and brightness is gathering attention among their business buyers.

Rotomolding Market: Key Drivers • Sheer pace of urbanization in some of the developing regions of the world has spurred the applications of rotomolded products • Rise in governments’ investments on building public infrastructures in numerous emerging economies is boosting the demand for rotomolded products • Rise in demand for residential projects is a key trend bolstering the sales in the rotomolding market Rotomolding Market: Regional Dynamics Asia Pacific is a potentially lucrative regional market. The growth in opportunities can be ascribed mainly to the rise in demand for such products in the building and construction sector. Rise in demand for public and private sector for affordable housing is a key trend boosting the growth avenue in emerging economies of the region.

Purchase Premium Research Report on Rotomolding Market @ https://www.transparencymarketresearch.com/checkout.php Rotomolding Market: Key Players Companies with prominent presence are PartnerPlast Group, Roto Dynamics Inc., Dutchland Plastics, and Elkhart Plastics, Inc. Some of the other well-entrenched players are Sherman Roto Tank, Carris Pipes & Tubes Private Limited, and Rotoplast SAS. About Transparency Market Research Transparency Market Research is a global market intelligence company, providing global business information reports and services. Our exclusive blend of quantitative forecasting and trends analysis provides forward-looking insight for thousands of decision makers. Our experienced team of analysts, researchers, and consultants use proprietary data sources and various tools and techniques to gather and analyze information.

Our data repository is continuously updated and revised by a team of research experts, so that it always reflects the latest trends and information. With a broad research and analysis capability, Transparency Market Research employs rigorous primary and secondary research techniques in developing distinctive data sets and research material for business reports.

UPFRONT PSI Brand Names Toby Huff North American Sales Manager Covering all of North America PSI Brand is pleased to announce that Toby Huff, a longtime veteran of the Rotational Molding Industry, will join the organization as the North American Sales Manager for branding solutions and services provided by PSI Brand.

Toby has more than 40 years of experience working in most aspects of the Rotational Molding industry. He began his career working side-by-side with his father Arlen Huff, an industry leader and original ARM member, in their company (Spin-Cast Plastics). Over the years Toby developed a broad range of experience from Machine Operator to Sales Engineer to Sales Manager. As a supplier for the Rotational Molding Industry, he has experience in compounded materials, PE, Nylon, PVC, two wall and three wall systems, mold release products, tooling, pulverizing equipment, and now In Mold and Post Mold Graphics for PSI Brand.

Toby will improve and expand the coverage of the rotational molding market for PSI Brand. “With his exposure to many different aspects of the industry, Toby will be a great resource to our customers in addressing their needs and developing further opportunities. His ability to evaluate applications, molding parameters, and matching the right solution for the project will enhance the value of PSI Brand’s

increasingly popular, easy ‘peel & stick’, no hassle, in-mold and post-mold graphic branding solution for the industry,” said Steve Crawshaw, Managing Director of PSI Brand.

Please feel free to reach out to Toby at 704.369.9187, or toby@psibrand.com to inquire about PSI Brand’s products and services, or to ask Toby about new applications, opportunities, or molding issues that he may help you address.

PSI Brand is a family-owned and operated company with over 40 years of experience in the Rotational Molding Industry, dedicated to improving your sales through increased brand awareness, reducing costs through small-minimums, prompt supply, and unlimited shelf-life of their graphics. As ex-roto-molders, their products are designed with operator in-mind, so ease-of-application with a ‘replace or return’ guarantee means there’s little or no risk to improve your brand experience.

For more information check us out on www.psibrand.com, to contact PSI Brand direct, please call Jim Crawshaw on our freephone 1877 616-2346, or via email at jim@psibrand.com.

ROTOLOAD™ powder weighing & dispensing systems

» ROTOLOAD™ is the ONLY solution to ALL of your powder resin handling needs. » ROTOLOAD™ is the ONLY comprehensive line of powder resin conveying and weighing equipment, specifically designed to meet the demands of the Rotational Molding Industry. » ROTOLOAD™ uses vacuum to load your material, hold it above your process machine, and dispense, quickly and accurately. In addition it is the ONLY solution to the question of how to reduce under and overweight parts, mess, downtime and resin loss.

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www.rotoworldmag.com 23

UPFRONT KraussMaffei Solutions for a Wide Variety of Different Plastics Recycling Applications

• Extrusion technology for thermomechanical recycling • Optimum degassing solutions for solvent-based recycling • First-class machine concept for various recycling applications

HANOVER, GERMANY — Converting clean industrial

waste or contaminated mixed waste from the “Green Dot” system into pure polymers or even complex recompounds – plastics recycling is a highly diverse and extremely challenging task!

As an experienced machine manufacturer and material expert, KraussMaffei’s extrusion division brings a great deal of expertise to the table – perfect prerequisites for sustained success in this important growth market. KraussMaffei’s extrusion technology is the first choice for plasticizing and degassing process steps as well as for repelletizing and recompounding.

“The most important advantage KraussMaffei offers is the wide variety of line concepts, which are customized for each individual recycling application. Depending on the specific requirements, we can design these lines as stand-alone or cascade solutions with almost unlimited output rates,” says Carl-Philip Pöpel, Director of Global Application & Product Ownership – Extrusion Technology at KraussMaffei. “Another plus point is the option to use a system solution composed of a single-screw extruder and a twin-screw extruder, especially when it comes to solvent-based plastics recycling. We are the only machine manufacturer worldwide to offer this unique combination as a one-stop solution.”

24 ROTOWORLD® JUNE-JULY 2021

Extrusion technology for thermomechanical recycling During mechanical processing of plastics waste, the chemical structure remains unchanged. The used plastic parts are crushed, cleaned, sorted by material type, and finally reprocessed.

“The KraussMaffei EdelweissCompounding technology is based on two extruders operating in cascade arrangement. In the first stage, a twin-screw extruder is fed with the plastics scrap and prepares the starting material so that the degassed melt can be filtered through a 100 to 300 µm filter – depending on the technical specifications of the future product,” explains Franz-Xaver Keilbach, Global Application Owner Recycling at KraussMaffei. “Depending on the planned use of the material to be produced, either a pelletizing system is arranged downstream from the ZE extruder, or the cleaned melt is directly transferred to the second stage, i.e., a compounding extruder. This extruder is used for controlled material upcycling by incorporating fillers and reinforcing agents, additives, stabilizers, and dye.”

For ground material with an apparent density of below 0.25 kilograms per liter, the Edelweiss Compounding technology can be complemented by an upstream compacting stage. The “fluffier” the input material, the more important is the use of a compactor cutter in order to heat, dry, and agglomerate the sheet and film scraps to facilitate their subsequent processing in the twin-screw extruder.

UPFRONT KraussMaffei extrusion solutions for premium-quality recompounds Optimum degassing solutions for

solvent-based recycling “The solvent-based process is an interesting alternative especially for recycling composite materials that cannot be separated mechanically. Solvents are used to separate polymers from plastics composites or plastics compounds.

However, the solvent has to be removed again afterwards,” explains Franz-Xaver Keilbach. Here, too, the ZE BluePower twin-screw extruder comes into action.

The rotating movement of its screws creates a large and permanently renewed melt surface, from which trapped volatile matter can escape more easily. Via openings in the housing that are connected to a vacuum, the solvents are removed from the process. The solvent removal is carried out in different pressure stages. The contaminated solvents Cutter Compactor – made by KraussMaffei are evaporated and subsequently condensed before they can be reused.

Here again the exact process characteristics are determined First-class machine concept for recycling applications by the required properties of the polymer produced. To reduce The high energy efficiency is one of the outstanding advantages the original 30 percent residual solvent content in the material of the ZE BluePower extruder series. Operating costs are to 2 percent, for example, a twin-screw extruder will be substantially reduced thanks to numerous innovations in terms sufficient. However, if purity levels in the ppm range are of energy efficiency and process-engineering features like power required, a two-stage cascade configuration is recommended. trains with optimized operating point, water-cooled three-phase KraussMaffei Extrusion implements this cascade solution by a. c. motors, and gear units with maximum efficiency. The using a combination of a single-screw extruder with a twinmodular range of barrel sections with 4 and 6D lengths and the screw extruder. wide variety of available screw elements ensure uncompromising “Regardless of whether the material is recycled by a flexibility in the development of customized ZE BluePower thermomechanical or a solvent-based process, the result is twin-screw extruder solutions for specific applications. The always an optimally cleaned melt. This melt can either be combination of large free volume in the processing section and repelletized to a standard polymer or upgraded in an additional high torque density gives optimum conditions for extremely compounding step.” cost-effective recycling and compounding processes.

Single-screw extruder technology for the effective removal of solvents from the melt

www.rotoworldmag.com 25

UPFRONT Tank Holding Acquires Rotational Molding of Utah Tank Holding, North America’s largest rotational molder, has acquired Utah based rotational molder Rotational Molding of Utah. RMU designs and manufactures high-quality proprietary tanks, pallets, and refuse products as well as a variety of other custom products.

“RMU brings valued long-term customer relationships and continues an important part of Tank Holding’s overall growth strategy, which is to strengthen leading positions in core and adjacent markets, including expansion of our custom molding division. The manufacturing facility will provide compression molding technology as well as additional rotational molding capacity in the southwest region. This acquisition affords us the opportunity to leverage our industry knowledge and expertise to create greater value for our customers,” said Greg Wade, CEO of Tank Holding.

The RMU acquisition provides additional synergy opportunities with several of Tank Holding’s recent acquisitions while complementing core tank and material handling product lines. Together, these market leading brands and product offerings provide the industry with the broadest product portfolio and the largest footprint of manufacturing facilities. The transaction includes the facility located in Brigham City, Utah.

“Tank Holding is the ideal partner to accelerate our growth objectives and expand our market reach. Both companies’ values are well aligned, and I am confident we will continue the success for both our customers and employees for years to come,” said Joe Brough, Chairman of Rotational Molding of Utah.

The RMU announcement represents Tank Holding’s 14th acquisition in the past two years, and further enhances the company’s far-reaching portfolio of products to serve a wide variety of end markets through a growing number of distribution channels.

Besides being a world leader in the design and manufacturing of polyethylene tank and container products, Tank Holding also maintains major market positions with many other proprietary products, including intermediate bulk containers, insulated material handling bins, laundry, and linen carts, refuse containers, specialty pallets, and custom products.

Tank Holding, which includes the brands of Norwesco, Snyder Industries, Bonar Plastics, Bushman, Chem-tainer, Meese, Stratis Pallets, RMI, and Dura-Cast, owned by Olympus Partners and the management team, currently operates 36 manufacturing plant locations, and employs over 1,000 people throughout North America, prior to the RMU acquisition.

Olympus Partners is a private equity firm focused on providing equity capital for middle market management buyouts and for growing companies. Olympus manages in excess of $8.5 billion mainly on behalf of corporate pension funds, endowment funds, and state-sponsored retirement programs.

Founded in 1988, Olympus is an active, long-term investor across a broad range of industries including business services, food services, consumer products, healthcare services, financial services, industrial services, and manufacturing.

Alaaddin Aydin of MAAG Group now in the European Senate of Business OBERGLATT, SWITZERLAND

— Alaaddin Aydin, VP MAAG Germany/ Managing Director, was appointed to the Senate of Economy Europe.

Mr. Alaaddin Aydin represents MAAG Germany GmbH as Senator in the European Senate of Business. The appointment took place during the Senate’s Wine Blossom Festival on June 12, 2021 at the Sankt Annaberg Winery in Burrweiler, Germany. Mr. Alaaddin Aydin received the appointment certificate from Norbert Streveld, Chairman of the Executive Board Senate of Business Germany and Dr. Christoph Brüssel, Chairman of the Executive Board Foundation Senate of Business.

The Senate of Business is made up of personalities from business, science and society who are aware of their responsibility 26 ROTOWORLD® JUNE-JULY 2021

to the state and society. Together, they contribute to the practical implementation of the common good-oriented goals of sustainability in the context of an ecological / social responsible market economy.

To achieve its goals the Senate of Business is in dialogue with representatives from politics and science. Our honorary senators JeanClaude Juncker, Professor Günther Verheugen, Professor Klaus Töpfer, Professor Jürgen Rüttgers and Rosi Gollmann, along with many other experts, are exciting sources of inspiration.

Fairness and partnership in business life as well as the social competence of entrepreneurs and executives shape the work of the Senate. The ethical principles and values of the Senate’s community are the basis and guideline for the economic actions of the members of the Senate.

UPFRONT Clariant Sells Pigments Business to Consortium Consisting of Heubach and SK Capital Heubach partners with SK Capital to drive next phase of growth for Clariant’s pigments business.

The Heubach Group, in partnership with SK Capital Partners, announced a definitive agreement to acquire Clariant’s pigments business. The combined business will operate under the Heubach name and create a leading global pigments business with annual sales of more than EUR 900 million.

The transaction values Clariant Pigments at approximately EUR 740 million, with an additional consideration of EUR 46 million contingent on the business unit’s financial performance in 2021.

As part of the transaction, Clariant will hold a minority stake in the combined company, demonstrating its continued commitment to the success of Clariant Pigments and the significant growth opportunities in the combination with Heubach.

Heubach is a global manufacturer of organic, inorganic, and non-toxic corrosion protection pigments with four global

production sites and approximately 1,000 employees. Clariant Pigments is a worldwide supplier of organic pigments, pigment preparations, and dyes. It operates 13 global production sites and employs around 1,900 people.

High synergy effects expected High synergy effects are expected from the merger of Heubach and Clariant Pigments. A diversified pigments company will be created that will strengthen the existing positions of Heubach and Clariant Pigments. The two companies have a complementary product portfolio and a regionally compatible plant structure, enabling an expanded product range and broader geographic coverage.

Continued on page 28

www.rotoworldmag.com 27

UPFRONT Johann Heubach, CEO of the Heubach Group, said, “We have been in the pigments business for more than 200 years. My late father and I set out to drive consolidation in the pigments industry, and the merger of Heubach and Clariant Pigments is an important milestone in this vision. We are very pleased to have SK Capital as a partner, and we are excited to benefit from their expertise in integrating and operating businesses in the global chemical industry. Heubach and Clariant Pigments are a perfect fit. The combination of industry-leading technologies, a product portfolio covering a broad range of customer needs, and a global manufacturing and service presence will enable the newly formed Heubach Group to serve our global customer base in coatings, plastics, inks, and specialty applications with industry-leading products and services.”

Transaction closing expected to close in the first half of 2022 Aaron Davenport, a managing director of SK Capital, noted, “Clariant Pigments is a global leader in colorant solutions, and together with our new partners, Heubach Group and Clariant, we see a tremendous opportunity to create significant value for all parties.”

Conrad Keiijzer, chief executive officer of Clariant, said, “We are pleased to announce the agreement with Heubach and SK

“We have been in the pigments business for more than 200 years.”

— Johann Heubach

Capital to sell our pigments business. We are confident that with Heubach and SK Capital we have found the right new owners for this business, for our customers, our colleagues, and our other stakeholders.”

The closing of the transaction is subject to customary conditions and approvals and is expected to occur in the first half of 2022.

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DESIGN

COMMENT

Michael Paloian, Integrated Design Systems, Inc.

Root Cause Analysis – A Critical Design Skill Choosing product design as a career path will lead you into many challenging and sometimes very frustrating experiences.

It is a gratifying profession that requires you to learn, think, be creative, and solve problems constantly. The design process is often equated to sitting at a computer and generating CAD files. Nothing could be further from the truth. Great designs are developed from brilliant ideas, which have been skillfully engineered into elegant devices that are beautiful, reliable, and minimal. The last step in the design process is often overlooked because it is not glorious or dramatic. It is sometimes referred to as debugging or troubleshooting, but is essentially design analysis and verification. This process requires a designer to be objective, observant, analytical, and technically skilled. We’ll discuss some of the problems frequently encountered toward the end of a design project immediately before production begins in the remainder of this article.

The CAD files been checked hundreds of times throughout the design process. Parts have been inspected for draft, clearances, radii, and dozens of other essential considerations before they were released for tooling. You’re sure everything will be fine when parts are molded and assembled. The big moment arrives, and now you’re confronted with the reality of parts not fitting as they were expected to fit. There are numerous interferences, irregular gaps between mating parts and unsightly warpage on critical cosmetic surfaces. Everyone is surprised, and all eyes are on you. Why are we dealing with these problems before this critical production launch? Numerous suggestions for solving these problems are offered by the salesman, production guy, manufacturing manager, and quality people. Most of the corrective actions imply your design is wrong, and the molds must undergo significant changes to remedy the situation. The pressure is on; what do you do? You must maintain a cool head, an open mind, and begin to examine each problem step-by-step critically. You’ve transformed yourself from a temperamental creative designer to a calm, unemotional detective whose mission is to find the root cause of all the problems and offer the best solutions for all of them.

Design analysis and verification during production startup should comply with the following guidelines: • Never make any design changes without first identifying the root cause of the problem • Analysis should be methodical and consistent • Maintain vigilance in observing all inconsistencies • Dimensional measurements should account for potential part warpage and distortion

• Multiple measurements of the same feature should be recorded • Sample measurements should be made a room temperature Identifying the root cause of problems of products in the field should include the following considerations: • It’s always helpful to be able to trace parts with a date stamp to a particular date of manufacture and resin lot • Always document the number of failures, the mode of failure, the use conditions, and the environment • Environmental factors include temperature, loads, time in the field, chemicals, etc.

Comparison of measurements to production control drawings will confirm parts have been molded within specifications or are not compliant. Production control drawings are essential for identifying critical dimensions and tolerances. If tolerances are too tight, design modifications will be required for parts to fit one another as intended. Unfortunately, I cannot elaborate on this topic within this editorial, but I do hope this brief focus on root cause analysis has provided you with some insight pertaining to the complexities of this critical step in the design process.

If you have any comments or questions, please feel free to contact me at paloian@idsys.com. I’d love to hear from you. www.rotoworldmag.com 29

TRAVEL UPDATES

International Travel During COVID-19 Latest update from the Centers for Control and Disease Prevention

Do not travel internationally until you are fully vaccinated.

If you are not fully vaccinated and must travel, follow CDC’s international travel recommendations for unvaccinated people.

Fully vaccinated travelers are less likely to get and spread COVID-19. However, international travel poses additional risks, and even fully vaccinated travelers might be at increased risk for getting and possibly spreading some COVID-19 variants.

The COVID-19 situation, including the spread of new or concerning variants, differs from country to country. All travelers need to pay close attention to the conditions at their destination before traveling.

CDC will update these recommendations as more people get vaccinated, as rates of COVID-19 change, and as additional scientific evidence becomes available.

Recommendations for fully vaccinated people Have you been fully vaccinated?

People are considered fully vaccinated if: • 2 weeks after their second dose in a 2-dose series, such as the Pfizer or Moderna vaccines, or • 2 weeks after a single-dose vaccine, such as Johnson & Johnson’s Janssen vaccine If you don’t meet these requirements, you are NOT fully vaccinated. Keep taking all precautions until you are fully 30 ROTOWORLD® JUNE-JULY 2021

vaccinated. If you have a condition or are taking medication that weakens your immune system, you may NOT be fully protected even if you are fully vaccinated. Talk to your healthcare provider. Even after vaccination, you may need to continue taking all precautions.

• Before you travel - Make sure you understand and follow all airline and destination requirements related to travel, mask wearing, testing, or quarantine, which may differ from U.S. requirements. If you do not follow your destination’s requirements, you may be denied entry and required to return to the United States.

- Check the current COVID-19 situation in your destination.

• During traveling: - Wearing a mask over your nose and mouth is required on planes, buses, trains, and other forms of public transportation traveling into, within, or out of the United States and while indoors at U.S. transportation hubs such as airports and stations. Travelers are not required to wear a mask in outdoor areas of a conveyance (like a ferry or top deck of a bus).

- Follow all recommendations and requirements at your destination, including mask wearing and social distancing.

• Before you arrive in the United States:

TRAVEL UPDATES

- All air passengers coming to the United States, including U.S. citizens and fully vaccinated people, are required to have a negative COVID-19 test result no more than 3 days before travel or documentation of recovery from COVID19 in the past 3 months before they board a flight to the United States.

• After travel: - Get tested with a viral test 3-5 days after travel.

- Self-monitor for COVID-19 symptoms; isolate and get tested if you develop symptoms.

- Follow all state and local recommendations or requirements after travel.

Recommendations for unvaccinated people If you are not fully vaccinated and must travel, take the following steps to protect yourself and others from COVID-19: • Before you travel: - Get tested with a viral test 1-3 days before your trip.

- Make sure you understand and follow all airline and destination requirements related to travel, testing, or quarantine, which may differ from U.S. requirements. If you do not follow your destination’s requirements, you may be denied entry and required to return to the United States.

- Check the COVID-19 situation in your destination.

• While you are traveling: - Wearing a mask over your nose and mouth is required on planes, buses, trains, and other forms of public transportation traveling into, within, or out of the United States and while indoors at U.S. transportation hubs such as airports and stations. Travelers are not required to wear a mask in outdoor areas of a conveyance (like on a ferry or the top deck of a bus). CDC recommends that travelers who are not fully vaccinated continue to wear a mask and maintain physical distance when traveling.

- Avoid crowds and stay at least 6 feet/2 meters (about 2 arm lengths) from anyone who is not traveling with you.

- Wash your hands often or use hand sanitizer (with at least 60% alcohol).

• Before you arrive in the United States: - All air passengers coming to the United States, including U.S. citizens and fully vaccinated people, are required to have a negative COVID-19 viral test result no more than 3 days before travel or documentation of recovery from COVID-19 in the past 3 months before they board a flight to the United States.

• After you travel: - Get tested with a viral test 3-5 days after travel AND stay home and self-quarantine for a full 7 days after travel.

■ Even if you test negative, stay home and self-quarantine for the full 7 days.

■ If your test is positive, isolate yourself to protect others from getting infected.

- If you don’t get tested, stay home and self-quarantine for 10 days after travel.

- Avoid being around people who are at increased risk for severe illness for 14 days, whether you get tested or not.

- Self-monitor for COVID-19 symptoms; isolate, and get tested if you develop symptoms.

- Follow all state and local recommendations or requirements.

• Visit your state, territorial, tribal, and local external icon health department’s website to look for the latest information on where to get tested.

Do NOT travel if you were exposed to COVID-19, you are sick, you test positive for COVID-19, or you are waiting for results of a COVID-19 test. Learn when it is safe for you to travel. Don’t travel with someone who is sick. www.rotoworldmag.com 31

AT ISSUE Martin Coles, Matrix Polymers

NZ Gas Ban – A Wake-up Call for All Rotomoulders?

New Zealand has proposed a ban on all new installations of natural gas. This is to reduce CO2 emissions so the country can attempt to meet its climate change targets.

This has come as quite a shock to the rotomoulding community there as it has the potential to be a major threat to the future of the process in New Zealand. There is also the uncomfortable question for the rest of the global rotomoulding industry – Is New Zealand the “canary in the mine”? the early warning signal of a new trend that will eventually affect rotomoulders in every country?

Natural gas is our industry’s energy of choice – it’s readily available in most places, it’s an efficient form of energy and it’s cheap. If bans come in and we’re not going to be allowed to use it, 32 ROTOWORLD® JUNE-JULY 2021

what are the alternatives and are these practical and realistic?

Let’s look at electricity.

It seems that everything is going to be converted to electricity.

So, what about rotomoulding machines? There are a few conventional rotomoulding machines that do run on electricity.

Reinhardt Teknik in India built their first electric carousel for Saeplast in Iceland 10 years ago, and it’s still running well. The customer already had two Reinhardt fossil-fuel powered ovens, but the fuel must be imported and is expensive and Iceland has very cheap renewable electricity generated from hydro, geothermal, and wind.

The Reinhardt machine has a 3.8 metre oven, and the

AT ISSUE

connected load is up to a very meaty 800 KW. Dhanu Patell of Reinhardt tells me that they now have more experience, and the connected load can be as low as 400 to 600 KW depending on the size of the machine. The time it takes for the oven to get up to temperature and cycle times are the same as for a gas-fired oven and temperature control is very good. Dhanu estimates the power consumption as 1.15 kWh per kilo of LLDPE processed. The heaters need no maintenance and there is no gas flue to manage.

What are the downsides? Well, the machines are about 30% more expensive than gas-powered ones and the connected load is substantial. Would your local electrical infrastructure be able to handle this and if you had several machines would you have to stagger start-ups? Will there be enough electricity available in any case if everything else is converting to electricity? And in most of the world electricity is significantly more expensive than natural gas.

Of course, there is the thorny question of how the electricity is generated. If the electricity is being made by burning fossil fuel, like natural gas, then you are defeating the whole objective of reducing CO2.

Bill Spenceley, CEO of Flexahopper in Canada is a rotomoulding industry pioneer in adopting green energy

solutions and his whole plant is covered in solar panels and all his other electricity is sourced from renewables. Bill tells me that it takes 3.5 times the amount (equivalent units) of energy in gas to produce one unit of electricity – so using electricity made from gas, to replace using natural gas in rotomoulding would significantly increase CO2 emissions!!

So, for most of the world simply converting from a conventional gas oven to an electric one doesn’t seem very practical and is also going to be much more expensive.

What is our industry going to do?

In the next issue of RotoWorld® we will look at some other developing alternative technologies and see how we can reduce our energy consumption as an industry. In my view energy is a vital issue that we must come to terms with, and it is likely that the proposals to ban new installations of natural gas in New Zealand is just the start of a worldwide trend, which will accelerate as politicians around the world try to out-do each other in their promises to display their green credentials.

We urgently need to wake-up and start work on finding practical, realistic, and cost-effective solutions. www.rotoworldmag.com 33

ARM

REPORT

Serving the Rotational Molding Industry Worldwide for Over 40 Years

The mission of the Association of Rotational Molders is to promote, educate, and inspire the rotomolding industry. For more information, visit ARM’s website at www.rotomolding.org or contact the Association at 630-942-6589 or info@rotomolding.org.

Executive Forum Addresses Pressing Issues

ARM’s 2021 Executive Forum was held online throughout April and May and featured speakers discussing some of the challenges brought on by the pandemic. We heard from members that labor, supply chain, and automation were the issues they were facing.

ARM members joined the free weekly webinars and discussions.

After an initial discussion where molders shared three things they were negatively impacted from during the pandemic and three things they learned or benefited from during the pandemic, ARM was able to hone in on tackling the challenges molders faced. The following topics were covered: • Finding and Keeping Great Employees • How HR Leaders Can Adapt in Uncertain Times 34 ROTOWORLD® JUNE-JULY 2021

• • • •

2021 Economic Outlook Resin Industry Analysis and Forecast Managing Risk for Rotomolders Automation Case Study and Discussion

Although we all wished to be in person, the discussion, presentations, and lessons shared by all were well received.

All the Executive Forum sessions are available on-demand and free to ARM members. Contact staff if you need help accessing them.

ARM

REPORT ARM is happy to announce our 2022 meeting schedule.

Mark your calendar to join us for:

Executive Forum March 14-16 at the Omni Amelia Island Resort in Amelia Island, Florida

Annual Meeting November 7-10 at the Westin Peachtree Plaza in Atlanta, Georgia

We hope to return to hosting regional meetings as well in 2022. More information, schedules, hotel reservation links, and more will be available in Rotolink, our email newsletter, and on www.rotomolding.org as we finalize our meeting schedule.

Awards are back!

With the return of Rotoplas, we are excited to once again award the best of the best in the rotomolding industry.

This year’s student design submissions were inspired by the way consumer trends have changed during the pandemic. See the top designs and winners at Rotoplas.

Companies have two years’ worth of products to submit for the Product Competition. All Association of Rotational Molders (ARM) member companies are invited to compete in the 2021 Rotomolded Products Competition. ARM will recognize those companies who have entered products that are outstanding in the field of rotational molding. This recognition represents ARM’s commitment to the quality of rotational molding and furthers its goal of fostering public awareness of design applications and rotational molding capabilities. There are four categories: Conversion Award: Product must be converted from some other material or process to rotational molding.

Innovative State-of-the-Art Award: Significant departure from established rotomolding practice. Advanced state-of-the-art.

Must display examples of finest skill, craftsmanship, and quality.

Large Product Award: Product must have one minimum continuous dimension of 72 inches. Large product entrants may

represent their product by photograph, rather than shipping the actual product.

PVC Award: Product must display the versatility and uniqueness of Polyvinyl Chloride to the application.

Recycled Award: Minimum 15% content by weight of post-use materials. This award is a great way to impress customers and share your contributions to the rotomolding industry.

Also returning in 2021 is the most prestigious award in our industry: The Rotomolding Hall of Fame Award. Nominees were submitted by members and ARMO affiliates previously this summer. The award honors someone who has made significant contributions to the advancement of the rotational molding industry through leadership, creativity, commitment, and service and have shared openly their valuable experience with others in the industry. This year’s Hall of Fame Inductee will be announced in August. Check blog.rotomolding.org for the update.

Join us at Rotoplas to celebrate all of these accomplishments and more as we showcase the industry. The awards presentation will be held Thursday, September 23.

www.rotoworldmag.com 35

ARM

REPORT Rotoplas Education Sessions We’re excited to share a partial list of education sessions at the ARM Annual Meeting held September 20-23, 2021 in Rosemont/ Chicago, IL. More information at www.rotoplas.org How AI and Robotics are Changing the Way We Manufacture John McElligott will kick off our Annual Meeting at Rotoplas.

John was employed as a combat engineer specializing in demolitions, explosives, construction and engineering, an SAW gunner, and ultimately Squad leader. As Co-Founder of Royal Square Development and CEO of the Squared Collective, John spearheaded technology, marketing, community engagement and investor relations. John is a sought after national speaker on the impact exponential technology, robotics and artificial intelligence will have on rural and 3rd tier cities.

An Automation Journey Ken Bather, Seljan Company, will share automation insights from his decades in manufacturing, where he has seen companies journey from no automation to CNC routers to CNC and Robots.

Control cycle parameters and reduce variables using process control and live telemetry Adam Covington, Ferry Industries, will share how process control and live telemetry can go beyond simple reporting to allow rotomolders to take control of their cook and cool processes.

Embracing Change with Advanced Technologies Daren Balderson, Trilogy Plastics, will compare the impact of automation with Trilogy’s embrace of CNC routers in the roto workplace in the early 1990s as a paradigm shift away from hand fixture finishing and intense human labor. He will discuss how its re-allocated human assets to other areas of production, increasing throughput and productivity with safety and profitability gains.

The Future of Automation in Rotational Molding Machines Robert Sly and Matthew Jeffries of Rotoline will discuss the future of automation in rotational molding with case studies of rotomolders currently using robotic machines. The talk includes labor studies, information on safety and liability in automation, why Rotoline developed the machine, and where they see applications.

What is the best track and trace method for rotational molding?

Jim Crawshaw and Toby Huff, PSI Brand, will propose the best traceability solution suited to rotomolders. Track and traceability is undeniably known as the future of all manufacturing. Benefits include efficient identification of affected products in recalls, a higher level of quality control, insight into operational efficiency, and improved customer satisfaction.

36 ROTOWORLD® JUNE-JULY 2021

Roto’s role in the hydrogen fuel revolution Aldo Quaratino, Matrix Polymers, will look at the billions of Dollars across the globe being invested in developing hydrogen technology to produce clean, renewable, and carbon-free energy, and how rotomolding has a huge part to play. Matrix Polymers is working with several Rotomoulders and OEMs to produce cylinders for storing hydrogen for use in all forms of transportation and power generation.

Molding Quality Parts by Staying in Your Processing Window Carmine D’Agostino and Hassan Riaz, NOVA Chemicals, will share the benefits of producing parts with the correct processing window and the shortcomings when a part is not molded within that window. While optimizing processing conditions for the new NOVA TRx resins, the presenters have learned that operating outside of the optimum window can dramatically impact part quality.

Rotomoldable Acetal for Tank Applications Darin Grinsteinner, Celanese, will inform members about a single layer, low fuel permeation acetal material, developed specifically for rotational molding of tanks for a wide variety of applications.

Hostafom® acetal copolymer possesses a linear structure with a highly crystalline quality that provides a variety of characteristics: outstanding wear, long-term fatigue, toughness and creep resistance, and excellent resistance to moisture, solvents, and strong alkalis.

Setting Standard Operating Conditions for New Resins or New Parts Henry Hay, NOVA Chemicals, will host a workshop focused on how to conduct and document a trial for a new resin or a new part with an existing resin. This will include how to define the processing window and set standard operating conditions.

Considerations include using part quality requirements to set initial oven temperatures and determining the operating window at a given oven temperature.

SMART: Rotomolding solutions towards new market trends Sergio Zilioli, PERSICO, will share video of a fully automatic production cell made of 3x Smart machines with robotic and automated molds. He will also show a new market trend, related to hydrogen tanks for electric vehicles, manufactured with Smart machinery.

Why Automate?

Rob Miller, RotoLoad, will share the concepts of common automation technologies and practices within INJECTION, EXTRUSION, and BLOW MOLDING to inspire rotomolders to consider which concepts can implemented in their process. This is a great opportunity for molders to think outside the box to improve efficiency and tackle labor shortages.

More sessions to be announced.

ARM

REPORT The Benefits of Membership

Train your employees, reduce scrap, connect with customers, learn from experts and peers. This is what comes with membership and the return on your investment is tremendous.

Complimentary Registration for the 2021 Annual Meeting Provided for one employee for each new member company. This is your free entry to the world’s preeminent rotomolding meeting, held once every three years.

Sales Inquiry Notifications We review sales leads typically from companies seeking molders – and email them to our member companies. We actively advertise for leads on behalf of our members.

Sample Operator Instructions An 80+ page document calling out the highlights of nine company’s operator instructions. Also more than 700 documents and presentations from past Annual Meetings.

Immediate Free Access to more than 100+ on-demand webinars Topics range from Determining Your True Cost to Proper Sampling Techniques. Twenty new titles were added in 2019.

Immediate Free Access to ARM’s classic training video library Includes programs on curing, venting, and good manufacturing practices. All videos include Spanish subtitles.

Free Access to Troubleshooting Calls These moderated teleconferences are conducted every six weeks (eight

per year) and allow you to troubleshoot your process and discuss HR issues with other molders, suppliers, and rotomolding experts.

Networking with Industry Peers The greatest ARM benefit: Informal learning at a coffee break could revolutionize your process or reduce your expenses by tens of thousands of dollars. We hear it from members again and again.

Awards and Awareness Showcase your company in our online member directory and through awards including Safety Award, Product Competition, and more.

Discounted Registration to all ARM Meetings Includes regional meetings, the in-depth Hands-On Rotomolding Workshop at Penn College, and our Executive Forum which will be held in Italy.

Rotolink Our twice weekly e-newsletter shares important industry news.

Annual Meeting The premier event for rotomolders, their suppliers, designers and educators. Programming includes professional and industry speakers, valuable networking, group workshops, and exhibition.

To apply for membership, please visit www.rotomolding.org

www.rotoworldmag.com 37

ROTOPLAS 2021 is on!

38 ROTOWORLD® JUNE-JULY 2021

We can’t wait to step into the exhibit hall and see our friends Cellmark – An employee-owned independent supply chain September 21-23, 2021, at Rotoplas as the world of rotomolding service company. We are here to make your business operations gathers again. easier and support your trade. www.cellmark.com Rotoplas is the largest exposition for the rotational molding industry, offering the latest in advanced technology, products, ChemTrend – The most proven partner in the world for release services, and innovative parts made specifically for the agents, purging compounds, and other process chemical rotomolding process. specialties. Using a customer-centric approach and deep research The Board is excited to host this show again after such a long and development, we are here to help you become more efficient, time apart. In the spring we surveyed rotomolders and asked productive, and sustainable. www.chemtrend.com them to give us their best estimate of how many people their company would send to the meeting at the end of September.

Custom Plastics – Providing injection molding solutions for The median number of attendees per rotomolder company rotomolders for over 45 years. We are the original producer of remains the same as in 2017. Based on everyone’s best estimate spin weld fittings with over 250 different products. We have and how we interpret the data, the number of decision makers at two plants (IN and CA) allowing reduced shipping costs, and the meeting should remain about the same as in 2017. Around the increased capacity. www.spinwelding.com world, past attendees have told us again and again that they are excited that we’re gathering again this September.

ARM will offer seminars, general presentations, and workshops September 21-23 in conjunction with the trade show. Many of the presentations will focus “Based on everyone’s best estimate and how on the different ways automation can be implemented we interpret the data, the number of decision in the roto process. At the time this story was going to press, our education schedule had not been announced makers at the meeting should remain about but you can review the schedule now on page 36 and at www.rotoplas.org. the same as in 2017. Around the world, past The highlight of Rotoplas is our busy exhibit hall.

The floor will be open on September 22 and 23. Read attendees have told us again and again that on to learn about the 50+ companies you will be able they are excited that we’re gathering again to meet with. We expect more to be announced in the coming months.

this September.”

Avantech – A world-class supplier of CNC-machined tooling to the rotational molding industry, with over 30 years of tool building experience. Avantech also offers a single-source product design and development solution for our customers. www.avantech.com AXEL Plastics – A US-based manufacturer of mold release and process aid additives for all types of plastics, composites, rubbers, and urethanes. www.axelplastics.com

Diversified Mold & Castings – A full-service manufacturer of CNC machined, cast aluminum, and fabricated rotational molds from aluminum, steel, and stainless steel. DMC also provides mold design consultation, models, mold and frame repair and revisions, mold coating, and spare parts. www.diversifiedmolds.com

Bergen International – Since 1999 our objective has been to focus solely on chemical foaming agents -- offering endothermic, exothermic and endo/exo blends compatible with most of the polymers used in foaming applications.

Dow – Our focus is on working with customers to apply the right PE-based resin technology for their rotomolding needs so they can deliver on quality product design, capture growth opportunities, and overcome new challenges. www.dow.com/

Brunk Plastic Services – Leading the way as a one-stop shop for pulverizing, compounding, warehousing, railcar storage and bulk transportation. Our two locations in Goshen, IN and Bloomington, MN blanket the Midwest, so let us know how we can help you. www.brunkus.com

Drader Injectiweld – For over 40 years Drader has been manufacturing plastic welding equipment for the rotational molding industry. Drader has built a robust team of distributors to service throughout the USA, Canada, Europe, UK, and Australia. www.drader.com

Celanese – A Fortune 500 global chemical innovation company that engineers and manufactures chemicals used in products essential to everyday living. www.celanese.com

ENTEC Polymers – Distributor of prime branded rotomolding resins and compounds for the U.S. and Canada. www.entecpolymers.com www.rotoworldmag.com 39

ExxonMobil Chemical – A leading supplier of linear and crosslinkable polyethylene resins to the rotomolding industry.

These resins are available from us or from one of our distribution partners, H. Muehlstein, Quantum Polymers (North America), and JL Goor Materials (Ireland/UK) www.exxonmobilchemical.com FabFour – We use the latest CAD / CAM technology for CNC tooling to create aluminum rotational molding tools. Fabricated Sheet metal as well as mold revisions and refurbishments. Our custom projects include POP displays, fuel & hydraulic tanks, and many more. www.fabfourinc.com

Ferry Industries, Inc. – The global leading manufacturer of proven, highly productive rotomolding equipment with our RotoSpeed machines. Our innovation, reliability, performance, energy-efficient designs and customer service improve your products and your profits. Ferry – When Performance Counts! www.ferryindustries.com Foam Supplies, Inc. – A leading global manufacturer of polyurethane foam, elastomer and adhesive systems, and processing 40 ROTOWORLD® JUNE-JULY 2021

equipment, known for its unrivaled commitment to people, meeting its customers’ unique needs with innovative products and dedicated service, and to environmental responsibility. www.foamsupplies.com.

Hightower Products LLC – Provides High Performance Mold Releases, Paste Waxes, Cleaners, and Equipment. Let us design a solution for you. www.hightowerproducts.com Ingenia Polymers Corp. – With a passion for excellence, a relentless drive for innovation and an entrepreneurial spirit that’s unmatched in the industry, Ingenia Polymers is one of the most trusted thermoplastics providers in the world today, and the preferred supplier to some of the most recognized household brands. www.ingeniapolymers.com

Jerico Plastic Industries Inc. – A major supplier of materials to rotational molding companies that produce high end applications for both indoor and outdoor use. Our focus is developing custom compounds for the specialty applications of our rotational and injection molding customers. www.jericoplastic.com Lonestar Chemical – Since 1974 we have been a recognized distributor for many of the major petrochemical producers in the U.S. and foreign markets. With our many years of experience in

the plastic and Rotomolding industry, we can effectively evaluate all sources. www.lonestarchemical.com LyondellBasell – A leading supplier of Rotational Molding materials, with a broad portfolio of natural, compounded colors, special effects, and high-performance grades. We can virtually meet any of your product processing and performance needs. www.lyondellbasell.com M. Holland – The leading international distributor of thermoplastic resins, serving the plastics industry for 70 years.

The company’s technical experts possess a deep knowledge of rotational molding and offer guidance on both resin selection and ground products. www.mholland.com

Maverix Solutions – Manufactures mold release, anti-stats, process aids, and cleaners that improve rotational molding processes. Mavcoat release coatings allow multiple cycles with one coat, eliminate coining and warpage, reduce scrap, operate in higher temperatures, and speed up production. www.mavcoatmoldrelease.com McCann Plastics – Provides clients engineered solutions by applying an in-depth knowledge of thermoplastic plastic

compounding, materials, and end-use processing to best serve a client’s specific and often unique requirements. www.mccannplastics.com McLube Release Agent & Lubrication – Our line of rotomolding release coatings includes water and solvent-based options to suit any roto process, including semi-permanent release agents as well as conventional coatings for touch up in difficult areas. Gain more control over your process with McLube. www.mclube.com Midwest Patterns, Inc. – Rotational mold customers depend on timely and responsive service and rely on Midwest’s efficient management, depth of experience, and on-time shipments to make that happen. Using computer-aided design, CNC

machining, quality aluminum castings, and our years of experience, we deliver. www.midwestpatterns.com Mosaic Color & Additives – Manufacturer of pre-colored rotomolding resin and dry color. Technical compounder with in-house color and formulating lab capable of matching any color or developing new cost-effective compounds to meet your specific requirements. Shortest lead times with the highest quality. www.mosaiccolor.com www.rotoworldmag.com 41

Muehlstein – Authorized Distributor of ExxonMobil’s full line of Rotational Molding resins: LLDPE, HDPE & Cross-linkable PE. Custom compounder of pre-colored roto compounds. www.muehlstein.com N A Roto Machines & Moulds India – An ISO 9001:2015 Certified Company engaged in manufacturing and exporting Rotomoulding Plants under the brand name NAROTO for the last 39 years. We export our products in 87+ countries worldwide. www.naroto.com Nexeo Plastics – The leading thermoplastic resin distributor for rotational molders globally. We have the largest line card in the

rotomolding industry. Our technical, logistical, and application experts can help solve your material sourcing and process optimization needs. www.nexeoplastics.com Nix Screw Machine Products, Inc. – Our goal is to reduce your costs by developing superior quality parts. We build precision machined inserts, connectors, fittings, fasteners, spacers, and other specialty turned parts from brass, bronze, aluminum, stainless steel, mild steel, plastics, and other materials. www.nsmp.com 42 ROTOWORLD® JUNE-JULY 2021

Norstar Aluminum Molds – Produces cast, CNC machined, and fabricated aluminum molds. Services include design assistance, pattern construction, permanent releases, and mold repair and refurbishment. Products for mold maintenance, venting, and a variety of used molds are offered through RotoMart.com.

NOVA Chemicals – Delivers game-changing technology, innovative products, and the industry’s best customer experience.

We provide market leadership and help to grow the industry, while our best-in-class NOVAPOL® and SURPASS® resins and applications development support help our customers succeed. www.novachem.com

Paladin Sales – Manufacturer’s Representative Company featuring these unique products: Paladin EZ Logger In-Mold Air Temperature Monitoring & Recording System; PSI Brand In-Mold & Post-Mold Graphics; RotoLoad Powder Handling Systems; Paladin AutoMatic Mold Jacks, Nugent’s RotoMolding: A Practical Guide book. www.paladin-sales.com Persico – A world leader in the production of rotational molding equipment. We provide a complete range of services: from concept to design, engineering and manufacturing of prototypes,

models, molds, and automation systems for rotomolding, including SMART machinery and related DHT molds. www.persico.com Powder King, LLC – The Premier Manufacturer of Pulverizing Systems for Plastics Industry. Direct Drive Mills, Single Tool Gap Adjusting, High Volume Mill Air Cooling, Multi Deck High-Capacity Sifters. The only Company in World with Proprietary EC200 Operating System for Remote Operation of the Pulverizing System. www.powder-king.com Precision Products Enterprises LLC – We offer standard and customized accessories used on finished rotational molded

products. Our standard line items include lid and rings/manway lids, caps, threaded fittings, portable toilet accessories, spinwelds and more. www.pp-ent.com PSI Brand – The saying “necessity is the mother of invention” rings true for New Zealand based company PSI Brand.

Its permanent, indestructible, and innovative in-mold and post-mold, peel and stick, graphic solutions are literally making their mark on rotational molded products across the globe. www.psibrand.com

Quantum Polymers – A Distributor of ExxonMobil’s Rotational Molding resins in North America. With the proven high quality, consistency and reliability of these resins, we provide customers with a quality product, reliable supply, and support they can count on. www.quantumpolymers.com Reliance Mixers – A US manufacturer of homogenous mixing equipment used in the mixing of powders such as Polyethylene with Pigments and Additives. www.reliancemixers.com Rock Lake Robotics – Manufacturer of automated robot cells for trimming/flaming/spinwelding rotomolded products. www.rocklakerobotics.com

Rotaloc International, LLC – The leading designer and manufacturer of inserts, offering the largest range of threaded and non-threaded Inserts. Our extensive experience in molding and manufacturing ensures every insert is produced to the highest quality standards at our ISO9001:2015 certified facility. www.rotaloc.com Rotoline – The challenges are the fuel that feeds our desire to go beyond the traditional, to break paradigms, and set new standards. For almost 20 years, we have developed and produced www.rotoworldmag.com 43

state-of-the-art machinery, bringing new solutions to the rotomolding market. www.rotoline.com RotoPolymers – We are a customer service-oriented, innovative supplier of natural resins and compounds exclusively for the rotational molding industry. www.rotopolymers.com Roto Quip (Pty) Ltd – Established in 1994 with the aim to supply injection moulded components to the rotational moulding industry, primarily the rotational moulded tank market. We will be showcasing our range of lids, bulkhead fittings, and accessories. www.rotoquip.co.za RotoWorld® – The 20+ year trade magazine for the global Rotational Molding industry and design industry as relates to Rotational Molding. www.rotoworldmag.com Shanghai Young Mould Co., Ltd – Specializes in making rotomolding moulds and products. We can offer our customer the whole system services from mould design, mould making, product manufacture, assembly, and inspection to shipping. www.youngmould.com Solvay – A global leader in developing advanced stabilization solutions that meet customers’ most demanding requirements for the rotomolding industry. Our UV and thermal stabilizers play an integral role in helping rotomolded plastics process better, perform better, and last longer. www.solvay.com Stoner Molding Solutions – Known globally for providing superior performance and consistent quality with our Mold Releases, Flow Promoters, Mold Cleaners, and Parting Line Protectors. Check with Stoner to see what we can do for you. www.stonermolding.com STP Rotomachinery Inc. – We design and build rotational molding machines for customers around the world. We offer the full range of styles: independent-arm machine, shuttle machines (in-line, 3 and 4-sided) lab machines, rocking ovens. And they come in sizes from 2 m (84”) all the way up to 7.5 m (256”) in swing diameter. www.stprotomachinery.com Thintanks – Manufacturer of modular slimline rainwater tanks with Vertical Garden Option. www.thintanks.com.au Trademark Plastics – A full-service distributor of prime, generic prime, and off grade plastic resins. www.trademarkplasticscorp.com Vive Marketing – A marketing agency with a singular emphasis on manufacturers and an exclusive focus on plastic processors, plastic service providers, and mold builders. This specific niche serves as a competitive advantage by knowing your business, the network of professionals, the process, and vernacular within the plastics industry. www.marketingformanufacturers.com 44 ROTOWORLD® JUNE-JULY 2021

Wenling Rising Sun Rotomolding Technology Co., Ltd – A technology-based enterprise, covering the area of rotational equipment, and rotational molding. We have rich experience on carousel machines, shuttle machines, lined shuttle, rock n roll machines, and steel mould and aluminum mould processing. www.risingsunroto.com

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www.rotoworldmag.com 45

Case Study of a Long-Term Filled Industrial Storage Tank - Prediction at 20 years (Part 3)

By Eric Lainé1, Jean-Claude Grandidier1, Eric Maziers2, Steve Lewis3, Rua Woller4, Alistair Bell4 Institut Pprime, UPR3346 CNRS, ISAE-ENSMA, Université de Poitiers, F-86962 Futuroscope, France 2 Total Research & Technology Feluy, Zone Industrielle Feluy, B-7181 Seneffe, Belgique 3 Vision Plastics New Zealand Ltd, Silverdale, Auckland, New Zealand 4 Devan Plastics Limited, Judea, Tauranga 3110, New Zealand

1

eric.laine@ensma.fr, grandidier@ensma.fr, eric.maziers@total.com, s.lewis@vplas.co.nz, Rua.Woller@devan.co.nz, alistair.bell@devan.co.nz

The authors propose to present in three parts a methodology that goes from the characterization of long-term creep of rotomolded material (Part 1: MACreeP of rotomolded polymer structures) to the dimensioning of industrial rotomolded structure (Part 3: Case Study of a Long-Term Filled Industrial Storage Tank - Prediction at 20 years) through the correlation of numerical simulations / creep tests on a reference rotomolded structure (Part 2: Correlation numerical simulations/static and creep tests of a rotomolded HDPE structure (test mold)) to validate the behavior and numerical tools. This third part is a summary of work carried out by the authors over many years and which has been the subject of several presentations and scientific articles.

In the current context of research, competitiveness, and technological innovation, numerical simulation assumes an increased role in the design, qualification and certification of industrial products. Critical industrial decisions and compliance demonstrations are increasingly based on simulation. This is leading to a real change, as physical tests, which are used to form the essential part of these demonstrations, are increasingly becoming the reference for validating analyses and numerical tools. Indeed, the passage from the material sample for the characterization of the behavior [1] to the design of the final product by numerical simulation is made more efficient by carrying out an intermediate step [2]. This consists of a correlation between a test on a structure close to the one to be designed or a reference structure [2] and the numerical simulation of this test.

Methodology In a highly competitive market, aircraft or automotive manufacturers have been seeking for years to drastically reduce the development time and cost of their structures, while giving them a maximum level of performance. For example, the in-depth knowledge of metallic materials acquired since the beginnings of civil aviation, as well as the feedback from the entire family of aircraft, now makes it possible to rapidly approach the optimal solution without having to resort to large experimental campaigns [3]. Conversely, the introduction of composite materials leads to more complex behavior and failure modes, which require numerous characterization and identification tests. To meet this need for testing, the generalization of predictive virtual testing has been necessary at all the scales (materials to structure) and is used now in some industries. The numerical simulations at all stages of aircraft development are performed and checked prior to the physical testing for the certification of aircraft. This translates into 46 ROTOWORLD® JUNE-JULY 2021

a change in the distribution between experimental and numerical testing, at the different levels of the testing pyramid – see Fig. 1.

In civil engineering, calculation notes have been present since the last century and are necessary to certify buildings, as tests on buildings are much less accessible. Only measurements during the life cycle can be carried out to validate the codes. Now it seems interesting to apply this expertise to other kinds of structures.

Figure 1: Testing/calculation dialogue pyramid for rotomolded structures

Commercial water tank (DEVAN Plastics Limited) The protocol and tools are now sufficiently mature to be used in the world of rotomolded polymer structures, from the testing/ calculation of the characterization specimen [4] through to the dimensioning of rotomolded parts. In this paper, the structure is an above ground tank (Fig. 2) for collecting and storing water, manufactured by Devan Plastics Limited. These tanks are extremely durable and are available in a variety of stable colors.

Designed for maximum strength in the dome, this tank will not collapse during installation or maintenance, and will not be affected by most snow loads. UV stabilized; they are engineered to withstand New Zealand’s harsh environmental conditions. They are made of polyethylene (density of 0.947g/cm3) by rotomolding and are dimensioned for a 20-year life guarantee. Their capacities vary from 600 liters to 30,000 liters. The tank tested in this study is 25,000 liters. This tank was produced for the sole purpose of this study. Its dimensions are a height of 3000mm and an external diameter of 3500mm. The polyethylene in this tank has

a hydrostatic design basis (HDB) of 8.62MPa according to ASTM D2837 [5]. Therefore, according to the AS/NZ 4766 standard [6] for the design of tanks with this material for a 20-year life filled with water, the design stress (Von Mises maximum) is 4.31MPa. The elastic threshold [2] of this material is much higher than this value.

25,000 liters water tank test It is important to note that the initial geometry is not known precisely. Also the empty tank may be deformed by storage prior to filling, transportation and installation. The tank was filled with 25000 liters of water (which corresponds to filling the tank to a height of 2635mm) according to the following conditions:

measurements of the empty tank) to June 8, 2017. The daily profile is assumed to be a linear profile varying from minimum and maximum temperatures.

Numerical simulation of 25,000 liters water tank test To perform the test/simulation correlation, the 300kgs tank outer skin is modeled by surfaces. The numerical simulation is carried out with the assumptions that the tank will be in contact

Figure 2: 25,000 liter tank Devan Plastics Limited (test tank)

• • • •

1st truck: 12000 liters at a speed of 1000 l/min 1 hour waiting for the 2nd truck 2nd truck: 12000 liters at a speed of 1000 l/min filling the remaining 1000 liters via another water tank after 30 minutes

To measure the circumference, a tape measure is used. To ensure that the tape was correctly positioned at the correct height, marks were placed around the tank to ensure that the tape did not sag. Five measuring points on the height of the tank were selected: 100, 200, 400, 1000, and 2000mm. All these measurements were performed at 7 a.m. On each occasion, the ambient temperature was recorded. The first 11 measuring points have been considered. The tank was filled to a height of 2635mm.

The circumferential strain is the difference between the initial circumference (empty tank) and the circumference measured at different times. But during an extended time period of 80 days, the temperature changed. Fig. 3 shows the records of the temperature during the first 80 days of testing. This temperature profile is that of Auckland, New Zealand from March 21 (date of initial

Figure 3: Initial measurements at different heights of the sidewall (including temperature change during the first 80 days of testing)

with the sand and there is no deformation/sinking. The tank is positioned on a rigid surface with an imposed rubbing contact.

This hypothesis is severe compared to reality because there will be no deformation of the base and therefore no more deformation in the lower part of the side. In the case where the tank is placed on a bed of sand, one can imagine that the sand settles under the pressure in the tank and that the base will take a bulging shape from the center. Thus, this will tend to pull the periphery of the base and thus constrain the deformation of the sidewall. Because of its geometry, boundary conditions, and type of loading, the tank can be represented by a half model with symmetry conditions imposed. This is certainly a strong assumption, but it reduces the computation time. The loads considered are: www.rotoworldmag.com 47

• Its own weight, which is imposed via gravity and applied over 1 second in a static procedure, • A hydrostatic pressure imposed on a height of 2635mm with maximum pressure at the base of about 0.026MPa and zero at the dome. It is applied for 6840 seconds which corresponds to the actual water filling time (see section 2).

The base, sidewall, and dome are divided into 6, 12, and 6 zones respectively to assign different thicknesses (Fig. 4b). Following the results of the numerical simulation on the bottles [2], the tank was meshed with 44543 linear quadrilateral S4R elements (and 44848 nodes) which were validated for both thin and thick wall structures.

Two 300kg tank geometries are defined: • MCAD: CAD model (or reference model) where the sidewall has a constant external radius (1750mm) over the whole height (black dash line in Fig. 4a). The nominal thicknesses were determined during the design of the tank and are divided into sections (red line in Fig. 4a), • MRT: The “Real” model considers the initial measurements of the circumferences at different measuring heights. As shown in Fig. 4a, the radii are smaller than the reference model and are not constant over the whole height (grey dashed line). The real thicknesses have been measured and distributed by section (blue line in Fig. 4a).

Test/simulation correlation on the 300kg tank subjected to internal water pressure over 80 days To correlate the creep test of the 300kg water-filled tank, different numerical simulations are carried out with different assumptions (influence of the thicknesses, the sidewall profile of the tank, and the base deformation) [4]. The results point out that the influence of thickness and the sidewall profile of the tank are of the first order for the deformation kinetics. The deformation of the base is of the second order and its impact on the deformation of the side of the tank is almost negligible given the importance of the locally defined thicknesses over the entire height. To compare the numerical results with the deformations measured at the different heights of the tank, the circumferences are calculated at each height and the deformation is therefore calculated exactly in the same way. Finally, the temperature profile (Fig. 3) is defined as presented in the previous section. The parameters of the creep behavior law are therefore a function of the temperature between 10 and 30°C. Fig. 5 compares the experimental strain measurements at the different tank sidewall heights with those obtained numerically for the tank with the real sidewall profile and real thicknesses (MRT). Fig. 6 illustrates the difference between the numerical responses considering temperature variations in Auckland during the test period the average temperature over the test period is about 17°C. Results: • At 100mm (blue), the experimental and numerical data are very close • At 200mm (red), the deformation deviations are of the order of 0.2% • The largest deviations are at 400mm (green), about 0.8% in deformation • At 1000mm (orange) and 2000mm (pink) the deviations are reduced to between 0.2 and 0.5% • Despite the differences between the heights for the 200mm to 1000mm positions, the measured kinetics are similar to the ones obtained numerically • The temperature profile defined allows a good understanding of the creep evolution

Figure 4: (a) Thickness evolution all along the sidewall according to the nominal (MCAD) and real (MRT) tank volumes and the external profiles of the 300kg tank (MCAD and MRT) Fig. 4. (b) Assign different thicknesses by section

48 ROTOWORLD® JUNE-JULY 2021

The differences in deformation between the experimental and numerical measurements may appear high compared to the measurements, but it should be underlined that such a tank does not have a constant thickness, both over the height (as indicated) and over the circumference. Moreover, the stepwise definition of thicknesses and thus the introduction of discontinuities may be the cause of these deviations which are nevertheless at the scale of the structure. To improve the numerical model the comprehensive

knowledge of the initial shape is necessary. Perhaps a linear variation between the measurement points (possible in the finite element analysis software) might be a better approximation than assigning discrete sections of constant thickness.

Note: The numerical results are conservative, which is nevertheless reassuring in the context of long-term dimensioning.

Figure 5: Testing/simulation correlation - Numerical curves of strains at different heights of the tank sidewall with the actual experimental measurements

MCAD and MRT. The solid and dashed gray lines correspond to 10 and 20 years respectively. Fig. 7b illustrates the sidewall profiles of MCAD and MRT tanks, in the initial (empty) state, at the end of hydrostatic pressurization, and 20 years under hydrostatic pressure. The dark blue solid dots and light blue circles represent the initial and post-fill circumferential measurements, respectively.

Fig. 8 shows the 20-year Von Mises surface stress fields for both models.

Figure 7: (a) Comparison of numerical deformation responses at different tank sidewall heights of CAD and real tanks

Figure 6: Influence of taking temperature into account on the numerical responses at different measurement heights

Evaluation of the creep behavior at 20 years of the 300kg tank As we have seen, there are geometric differences between the CAD drawing (MCAD) and the final product of the tank (MRT).

These differences are in the outer dimensions of the tank and the thickness distribution (Fig. 4a). Variations in the outer dimensions are due to material shrinkage during cooling. Thickness variations are due to the choices of the rotational molding process parameters. For information in the simulation, the CAD model (MCAD) with the theoretical thicknesses is at a weight of 298.4kg while it is 284.6kg for the modified model with the measured thicknesses (MRT).

Fig. 7a shows the comparison of the deformation responses (calculated as before via the circumference) of the two models

Figure 7: (b) Comparison of the numerical profiles of the CAD and actual tank flank after loading (hydrostatic pressure) and at 20 years

Results at 20 years: • From 200 mm (red) to 400mm (green) tank height, the deviation between both models is maximum in this area and does not exceed 0.5% of deformation (Fig. 7a) • Below 200mm and above 400mm, the deformation deviations are reduced to be close at a height of 2000mm (pink, Fig. 7a) • The deviation of average radius is important and is due to the definition of the initial configuration (thickness). The two models are giving a similar evolution in the thickness.

• The maximum Von Mises stresses for the MCAD and MRT models are respectively 4.9MPa and 5.3MPa locally, which is www.rotoworldmag.com 49

Figure 8: Von Mises surface stress field at 20 years for the MRT and MCAD models

higher than the limit imposed by the AS/NZS 4766 standard (4.31MPa, Fig. 8). For both models, the area where the Von Mises stress exceeds the design stress (4.31MPa)) is approximately between 200 and 1100m.

• The maximum radial strains for the MCAD and MRT models are 4.25% and 4.60% respectively, which is lower than the limit set by the AS/NZS 4766 standard (5%).

• In addition, the AS/NZS 4766 standard [6] imposes: “For the serviceability limit state load case combination, maximum long-term displacements of the tank shall be limited to the following: (i) For net horizontal deflections of the tank wall, wall height divided by 50. The net horizontal deflection shall be calculated by taking the peak horizontal deflection in the wall of the tank and deducting from this the average of the horizontal displacement at the base/wall junction of the tank and the horizontal displacement at the wall/roof junction of the tank. (ii) For net vertical deflections of the tank roof, diameter divided by 75 for a cylindrical tank and span divided by 75 for a slim line tank. The net vertical deflection of the roof shall be calculated by taking the peak vertical displacement in the roof and deducting from this the vertical displacement at the wall/roof junction.”

(Note: For the two configurations studied, condition (i) is not satisfied, but condition (ii) is achieved) • Previously the test/simulation correlation concluded that the numerical response is conservative.

• With the hypotheses retained, the results presented show that the geometric differences between the two models have a significant impact on the overall long-term response.

For the real 300kg tank, the prediction at 20 years leads to a maximum deformation of 4.60% and maximum stress of 5.3MPa. The results in Von Mises stress and radial displacement are higher than those imposed by the AS/NZS 4766 standard.

However, knowing that the material used in this application 50 ROTOWORLD® JUNE-JULY 2021

has an elastic threshold well above 5MPa and that its creep law leads to a maximum deformation of 4.60% at 20 years (and is conservative), it can therefore be considered that the 300kg tank would be a perfectly acceptable solution, by slightly modifying the thickness distribution in the wall.

Evaluation of the creep behavior at 20 years of the 375kg tank The numerical responses of the 300 and 375 kg tanks are compared with the CAD model (MCAD) assumptions made and the respective theoretical thicknesses of each tank presented above (Fig. 4a). For information, the CAD model leads to a weight of 298.4kg and 373kg respectively for theoretical weights of 300 and 375kg.

Fig. 9 shows, as before, the numerical deformation responses (calculated via the circumference) for the two tanks at different sidewall heights. The deformations are much lower for the 375 kg tank. At 20 years of age, for 20% less in weight (and therefore thickness), the ratio of deformations between 100 and 2000mm in height varies respectively from 67.5% (0.57mm difference) to 80% (0.19mm) passing to 300mm at a ratio of 72.2% which corresponds to a difference of 1.09% of deformation.

This 375kg tank has been dimensioned according to AS/NZ 4766 [6]. The tank subjected to hydrostatic pressure will create a maximum Von Mises stress of 4.31MPa (ASTM D2837 [5]) in the most stressed area. At imposed pressure, whatever the behavior law of the material is, this maximum stress will be located in the sidewall at a height of about 600-700mm (Fig. 10a). As stated in the front section, the maximum Von Mises stress 3.80MPa for 375kg tank. In terms of deformations, Fig. 10b shows that the maximum values increase from 3.08 to 4.25% respectively for the 375 and 300kg tanks. In AS/NZS 4766 [6], it is specified that if a viscoelastic creep analysis is undertaken, the serviceability limit state creep membrane strain shall be less than 5% or lower value as specified by the material supplier.

For the CAD 375kg tank, the prediction at 20 years leads to a maximum deformation of 3% and maximum stress of 3.8MPa.

interesting as it is sufficiently predictive. However, to predict the long-term creep behavior with absolute certainty, it is critical to:

Figure 9: Comparison of numerical deformation responses at different tank sidewall heights of 300 and 375kg CAD tanks

• to know as much as possible about the long-term creep behavior of the material(s) used [1,4], the protocol to accelerate the creep should be mastered • to validate the behavior and numerical tools in a simplified context. At least once, a comparison between numerical simulations and tests on a representative structure should be performed (short or medium term, perfect control of boundary and loading conditions, reference structures...) [2] • to correlate measurements on at least one industrial structure during life in real conditions (thickness, geometry,) with numerical simulations, to define the most appropriate numerical tools and norms [5,6] This approach, represented by the test/calculation dialogue pyramid from the characterization specimen [1,4] to the design of rotational molded parts, has been described in the three parts.

Supplementing this approach with additional tests on other tank types and materials may lead to a reduction in the design safety factors imposed on the design and materials in the future. It seems obvious and logical that today, many industrial tanks on the market are oversized due to a lack of in-depth and necessary knowledge of the long-term behavior of materials. The purpose of these three papers is to demonstrate that this can be achieved using the methods outlined.

Acknowledgments The authors would like to thank DEVAN Plastics Limited for their participation in this study.

References Those wishing to obtain more detailed information on the rotational molding of plastics are referred to the following sources of information [1-6]:

Figure 10: Prediction of the evolution of the Von Mises stress (a) and the radial strain (b) on the tank sidewall height (MCAD) at the end of filling (continuous curves) and after 20 years (dotted curves) for 300kg (green curves) and 375kg (red curves) CAD tanks

The tank meets all the design requirements of the AS/NZ 4766 standard. With the knowledge of the long-term creep behavior law of PE, and the correlation results on the bottle and the 300kg tank, this tank could meet the 20-year service life.

Conclusions To design rotational molded structures/tanks, the numerical tool is

1. Part 1: MACreeP of rotomolded polymer structures, RotoWorld®, Volume XVII, Issue 6 (2020/2021).

2. Part 2: Correlation numerical simulations/static and creep tests of a rotomolded HDPE structure (test mold), RotoWorld®, Volume XVII, Issue 1 (2021).

3. G. Davies, J. Ankersen, Virtual testing of realistic aerospace composite structures, Journal of materials science, 43(20):6586–6592 (2008).

4. E. Lainé, C. Bouvy, J.-C. Grandidier, G. Vaes, Methodology of Accelerated Characterization for long-term creep prediction of polymer structures to ensure their service life, Polymer Testing 79 (2019).

5. ASTM D2837, Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products.

6. AS/NZS 4766, Rotationally moulded buried, partially buried and non-buried storage tanks for water and chemicals, 2020.

www.rotoworldmag.com 51

INDUSTRY 4.0

EPISODE 8

Rob Miller, Wittmann Battenfeld Canada Inc. / ROTOLOADTM

Mold Use Intelligence

Who could have possible predicted that we are about to enter our second COVID summer? Thankfully, it seems to be that conditions and statistics related to the pandemic are steadily improving, case numbers are dropping, and much of our daily environments, and lives are mostly back to some level of safety and consistency.

With the recent announcement of ROTOPLAS, I am looking very forward to breaking bread with all of you once again!

This episode’s question comes from Corey Claussen at Custom Roto Mold.

Q: Can Industry 4.0 be used to provide the intelligence to define which molds should be run with which other molds, or combination thereof, on which arm/cart, through which oven, at what molding parameters, to achieve the best possible outcome, efficiency, part quality, and overall production results.

This is a question that I have heard a few times before. I have often heard it referred to as automation. Merriam Webster defines AUTOMATION with the following (3) definitions.

52 ROTOWORLD® JUNE-JULY 2021

1: the technique of making an apparatus, a process, or a system operate automatically 2: the state of being operated automatically 3: automatically controlled operation of an apparatus, process, or system by mechanical or electronic devices that take the place of human labor A: The fact is that this answer is not quite so simple. Firstly, the importance and intrigue of this question, and a properly researched answer has significant impact to the relevance of Industry 4.0 to ROTO. I believe that the answer to this question does have some roots in Industry 4.0 principles, and the eventual result could definitely be defined as an Industry 4.0 process, but a detailed analysis is required to totally flush this out.

I wanted to start my process with the following…to fully understand the needs of the molder related to this question.

From my various discussions on the topic, the answer really stems from a general topic of mold compatibility. However, there seems to be a number of factors affecting this mold compatibility issue.

INDUSTRY 4.0

EPISODE 8

Rob Miller, Wittmann Battenfeld Canada Inc. / ROTOLOADTM

For mold compatibility to be applied, PIAT seems to be a common primary topic among many process parameters.

Compatible molds must have common PIAT characteristics to ensure proper lay out and material impact property windows.

However, there may be other factors affecting the proper processing of a given arrangement of molds.

These other factors also need to be taken into consideration to ensure that each of the molds is heated evenly and properly at the same oven time and temperature, as well as cooled consistently.

Not paying enough attention to these factors may result in uneven, and inconsistent results from warpage, shrinkage, different mold geometries, rotation ratios, and wall thickness requirements.

Fingernails on the chalkboard…needle scratching across your favorite vinyl on the turntable…

As I get deeper and deeper into this topic, I uncover more questions. I get started writing out a thought, which requires more investigation, which in turn flips that thought process on its head, only to lead down other different paths.

As all of you know, I am not an experienced molder, and I do not have the years of gut feel molding experience that many of you have.

What I do have is the desire to learn more, and to write about that learning in a way that is informative, detailed, and based in facts.

I take this responsibility seriously, to answer these questions with the due diligence and research that they, and you deserve.

In the end, to answer this question fully, I need more investigation, more questions, more research, more experts, and more time.

Please stay tuned until the next issue to see where this leads. If you have thoughts or opinions regarding this specific topic, PLEASE REACH OUT. Please reach out and share your thoughts. Learning from all of you is one of my favorite things to do, and while coming out of lockdown, expanding our knowledge can only be a healthy interaction!

I would truly enjoy engaging with each of you, and taking the information that is shared, and communicating it in the best way possible. Thanks for reading! www.rotoworldmag.com 53

Small acts of kindness at work benefit the giver, the receiver, and the whole organisation

In the lab, psychologists have shown how generosity propagates and spreads. If someone is kind to us, we tend to “pay it forward” and act more generously to someone else when given the chance. But it’s not clear if these findings are realistic.

For example, when we’re juggling priorities on a busy work day, might receiving an act of kindness actually be a nuisance, leaving us feeling indebted to return the favour when we’ve got more important things to do? An uplifting new study in the journal Emotion looks at acts of altruism within a real-life working environment, and shows how kindness really does ripple outwards from a good deed.

The researchers from the University of California headed by Joseph Chancellor studied workers from Coca Cola’s Madrid site, a group of mostly female employees from a range of departments.

Participants were told they were part of a happiness study, and once a week for four weeks they checked in to report how they were feeling, in terms of mood and life satisfaction, and their experience of positive and negative behaviours, including how many they had carried out towards others, and how many others had made towards them. Four weeks later, the participants completed further measures, such as of their happiness and job satisfaction.

Unbeknownst to most of the group, 19 of the participants were in cahoots with the researchers: they were “givers” whose task each week was to perform acts of kindness towards some of their co-workers (they were to refrain from showing kindness to other co-workers who served as a control group). It was up to the givers what generous acts they performed – Chancellor’s team wanted to make sure these participants had autonomy in what they did, rather than obeying an injunction (we know that this can turn out badly) – examples of the favours they performed included bringing someone a drink, and emailing a thank-you note.

So what did a month of extra kindness mean for the workers who were on the receiving end, for the givers, and for the organisation as a whole?

The acts of kindness don’t go unnoticed. The receivers observed more prosocial behaviours in the office and by the end of the study, they were reporting ten times more prosocial behaviours than the controls. In addition, receivers’ level of “felt 54 ROTOWORLD® JUNE-JULY 2021

autonomy” – essentially how much they felt in control of their days at work – were higher than controls over the course of the study, although it’s worth noting that this was because autonomy dropped in controls while it held steady in the receivers (Seth Margolis, a co-author on the paper, told me that work conditions were likely getting harder over the study period, with the acts of kindness acting as a buffer). One month after the study ended, the receivers were also enjoying significantly higher levels of happiness than controls.

Giving was itself rewarding, and on some indicators more rewarding than receiving. The givers saw the same preserved autonomy enjoyed by receivers, and additionally saw benefit to their sense of competency (again

relative to declining control scores) – presumably decorating Nuria’s monitor with a smiley face made of post-its reminds you of your creative potential.

The givers’ one-month followup measures were also more impressive than the receivers’: they enjoyed higher levels of life satisfaction and job satisfaction, and fewer depressive symptoms. This suggests that in this context, giving had a more durable effect than receiving. This shouldn’t be so surprising, as evidence suggests we feel happier when spending money on others than ourselves, and acts of kindness increase autonomy and competence.

Finally, and consistent with past lab studies, the research showed that receivers didn’t just enjoy acts of kindness – they paid them forward.

By the end of the study, the receivers reported engaging in nearly three times more prosocial behaviours than did

“The research showed that receivers didn’t just enjoy acts of kindness – they paid them forward.”

the controls. If this were direct reciprocity – Nuria figuring out who got busy with the smiley stickies on her monitor and fetching them a coffee as a thank you – then we would expect to see the givers reporting many more positive behaviours by study end. But they didn’t, suggesting that the acts were paid forward to someone other than the original giver, due to a sense of elevation and desire to participate in an organisation that was treating them in an ideal way. This contributes to the idea that while there are individual origins of prosociality, there is also a strong contagious quality to it, moving socially through groups, in much the way that phenomena such as rudeness and even obesity have been shown to do.

So workplace acts of kindness – freely chosen – appear to be a way to create virtuous cycles within organisations, benefiting the recipients, the givers, and the climate at large. Just get the goodness started, and enjoy its growth all around you.

www.rotoworldmag.com 55

ARMO

NEWS

ARMA | ARM-CE | ARMSA | BPF | IT-RO | NORDIC ARM | StAR

ASSOCIATION OF ROTATIONAL MOULDERS AUSTRALASIA LTD • ARMA

Welcome to ARMA Ltd Since the start of this year, we have been working hard behind the scenes to change the structure of ARMA from an Incorporated Association to a Company Limited by Guarantee and the transfer it now complete. While this change does not alter any of our excellent benefits and services, it does ensure that we are able to work and adapt with more freedom both federally and internationally.

Our new name is Association of Rotational Moulders Australasia Ltd. In line with this, we have also changed our branding and logo slightly and this has already rolled out across our website and social media. We will also no longer use the RotoConnect name.

Our contact details have also changed, and the office is now located in Melbourne, Victoria.

It is an exciting new chapter for ARMA, and the Board have worked hard to implement a new strategic direction over the next few years as well as a complete overhaul of policies, procedures, and the way we work.

ARMA Environment Group Update It is an exciting time for the Environment Working Group, who are setting some big industry goals and one of these is around the use of recycled materials. Approximately 2% of the market is currently recycled material and the group is working towards this being 5% by 2025.

An interesting development in this field is the rotomoulding of single use plastics which recently came to fruition here in Australia. Keep your eye out for the in-depth article on this project in a future issue!

“In a world first, noise walls along the Mordialloc Freeway will be made from 75 percent recycled plastic collected from households across the state, as part of a drive to build Australia’s greenest freeway.

The 32,000 square metres of noise walls required for the project will be made from more than 570 tonnes of plastic waste – half of which is plastic disposed in kerbside recycling such as milk and soft drink bottles.

The other half of the recycled content will be made up of soft plastics such as bread bags, food wrappers, and bubble wrap, which are notoriously difficult to recycle and usually end up in landfill.

The amount of recycled content going into these noise wall panels is the equivalent of 30 million water bottles, or the plastic waste collected from 25,000 Victorian homes in one year.

56 ROTOWORLD® JUNE-JULY 2021

ARMO

NEWS The noise walls have been made in Carrum Downs by PACT Our members will be impacted specifically by the Electricity, Group, helping them retain local jobs.

Natural Gas Use, and Industry and Heat recommendations At less than half the weight of steel or concrete panels, the within the Draft Advice. All businesses will be impacted by the recycled plastic noise wall panels are quicker and safer to Transportation recommendations.” install while still meeting or exceeding traffic noise reduction As part of the final submission, we also reached out to our requirements. The recycled plastic panels are also non-porous, international contacts through ARMO to for their input to meaning paint and graffiti can’t be absorbed into them.” highlight what was happening around the world with regard to Reference: Victorian State Government Press Release, rotational moulding and decarbonisation: Monday 1 March 2021.

In Central Europe, most factories are using gas as a power This is just the start with the government starting to open source. Just a few would have specialised machinery which is tenders on a multimillion-dollar road & rail infrastructure electrically powered (i.e., infrared machines, robomoulds with project that require a range of recycled products. robots and smart machines). Yet these specialised machines Within the same environmental space, ARMA has worked are operated for niche markets and could not be economically closely with Plastics New Zealand on a recent submission to the utilised for larger scaled machines needed for typical rotoClimate Change Commission. moulding applications such as larger tanks or containers.

The recommendations of the full draft advice of He A policy removing natural gas and LPG without a proper Pou a Rangi – the Climate Change Commission outlined alternative might even have a negative rather than positive impact recommendations for on the climate – suddenly reducing emissions in New markets would be flooded Zealand and suggests the with imported products direction of policy that that would be produced in Aotearoa could take to get foreign countries. By not there. being produced locally, It has a major effect on our these would result in large industry due to the ending of increase of transportation It has a major effect on our natural gas and LPG usage efforts, which would industry due to the ending of over the coming years. negatively impact the carbon natural gas and LPG usage As part of the submission footprint of products. Local New Zealand rotational production of roto-moulded over the coming years. moulders were surveyed to product, especially when collate as much information produced from recycled on the industry as we could materials, or when produced and then were asked to to be multi-use, or to replace endorse the final document heavier products, will result of which an excerpt is in better carbon footprints. included here: In North America almost “Addressing climate change is necessary for the ongoing health all, perhaps 99.5%, of rotational moulding machines are fired and wellbeing of both current and future generations. For this by natural gas, with approximately 4 new electric machines in reason, the New Zealand plastics industry supports the move service. It is improbable, and in practice, almost impossible to towards a Carbon Zero Aotearoa by 2050. see alternative source of energy for the industry happening in the The New Zealand plastics industry has been involved in near future. consistent improvement of environmental management practices Most of the Nordic region is powered by hydro, geothermal, for decades, including significant efforts to improve energy wind, or nuclear power for electricity. The industry tries to use efficiency and reduce consumption. Much of the industry are as little ‘earth’ in its electricity as possible as it is very expensive. already running on renewable electricity, and those companies Those that can use electric ovens promote their use of renewable still reliant on fossil-fuels have been keeping a close eye on energy. However, many of the machines within the industry are developing technologies that might enable decarbonisation. still powered by oil (diesel, gas).

The plastics industry is also a key enabler of many of the Watch this space as both recycling and decarbonisation are technologies required to achieve Carbon Zero 2050. Plastics going to be prominent topics over the coming years and as an are utilised extensively in renewable generation infrastructure industry we need to be looking to the future and be ready for the (e.g., hydro, wind, solar), electric vehicles of all types and energy change that is coming! efficient buildings to name just a few. www.rotoworldmag.com 57

ARMO

NEWS ASSOCIATION OF ROTATIONAL MOULDERS AUSTRALASIA LTD • ARMA

The Masterclass at the Machine Technical Training was Filmed within 3 Factories:

With a one-off subscription fee that provides 12 months access per Company, the training videos can be utilised as much as you require. They can be stopped and started and played over and over. Not only is the technical training from the Masterclass at the Machine included, but also the unreleased videos from Rotomould 2019 Conference in Brisbane.

58 ROTOWORLD® JUNE-JULY 2021

Urban Poly Tanks Pty Ltd (UPT) is an Australian company, based in Pakenham, Victoria. UPT manufactures a range of products, including water storage tanks. The UPT management team has more than 35 years combined experience in rotational moulding and tank manufacture. John Collier presents in the Urban factory on safety on the factory floor and what to look out for.

Melbourne Rotomould Tim Leed and Steve Kyval started this business to use their extensive rotomoulding knowledge to manufacture innovative designs for creative Australian and international businesses. They are passionate about the process, and it continues to fascinate them. Tim Leed provides training on PFG Group t/a Kiel Industries equipment is specially designed to offer an economic advantage with short production runs that are so vital to the Australian supply chain in this modern era.

Mark Medew talks about all aspects of Moulds as well as Recycling.

With over 6 hours of content, there is a special deal to all Rotoworld® readers to access the online training portal for a reduced cost. Just email michellerose@rotationalmoulding. com for a discount code or visit https://vimeo.com/ondemand/arma for more information. The training portal launched on the 28th June!

ARMO

NEWS BRITISH PLASTICS FEDERATION ROTATIONAL MOULDING GROUP • BPF

New BPF Document Highlights Vital Role of Plastic in a Sustainable Future The British Plastics Federation (BPF) has published a comprehensive new document, Plastics Explained: Exploring the Key Topics, which examines why plastic needs to be thought of more like a valuable resource and how it has a vital role to play as society works towards lowering carbon emissions. It is designed to be a useful reference tool for those working both inside and outside the plastics industry.

Plastics Explained includes facts and figures about the UK plastics industry, details the key role of the industry in a sustainable future and highlights the necessary steps that need to be taken to improve recycling in the UK. The document also takes a thorough look at the complexities surrounding many key plastic-related topics including deposit return schemes, consistent curbside collections, extended producer responsibility, marine litter, and chemical recycling.

The document suggests: • The UK’s target of net zero emissions by 2050 will not be possible without plastic, as the material is not only essential for things like insulation, lightweight vehicles, and wind turbines but also because alternative materials are often heavier and require more resources to produce, which can lead to increased emissions.

• All plastic packaging needs to be collected for recycling to develop a circular economy and simplify the current system.

• Money raised by the plastic packaging tax should be reinvested to address the lack of suitable collection, sorting and recycling infrastructure for plastic in the UK. Plastics Explained also covers taxing plastic packaging based upon the amount of recycled content; split targets and PRN reform; exporting plastic waste for recycling; fraud and waste crime; open and closed loop recycling; biobased, biodegradable and oxo-degradable plastics as a solution to littering; microplastics.

BPF Director General Philip Law states: “Everyone has a role to play in creating a more sustainable society and the plastics industry obviously has a role too. It is constantly innovating to reduce its environmental impact. Plastic will play a key part in all our futures, as it is vital to reducing the UK’s carbon emissions. In the same way we value the modern comfort and safety it brings, as our document suggests, we’d like to encourage people to think of plastic as a valuable resource to be kept in functional use for as long as possible. Plastics Explained covers a broad range of topics and we are confident it will prove useful as an easy means of getting to grips with these.”

Association of Rotational Moulders Australasia Inc. Tel: +61 (0) 7 3812 1450 www.rotationalmoulding.com CEO: Michelle Rose Cheif Executive Officer: Michelle Rose michellerose@rotationalmoulding.com

Association of Rotational Moulders Southern Africa PO Box 6966 Birchleigh 1621 Gauteng South Africa Tel: +27 82 772 3769 Fax +27 12 541 1738 Chairman: Wayne Wiid info@armsa.co.za www.armsa.co.za

IT-RO Italia Rotazionale Katia Zoppetti Via E. Brigatti 12 20152 Milano (MI) Italy Tel: +039 348 7652560 www.it-ro.it

Association of Rotational Moulding (Central Europe) e.V. (ARM-CE) MAUS GmbH - Rotationsgießformen Am Viehweg 9 - D-76229 Karlsruhe Amtsgericht Mannheim, HRB 103433 Tel.: +49 (0) 7 21 / 9 48 74 12 Fax: +49 (0) 7 21 / 9 48 74 44 Mr. Oliver Wandres, ARM-CE Chairman info@rotational-moulding.de www.rotational-moulding.de

British Plastics Federation Rotational Moulding Group 6 Bath Place Rivington Street London EC2A 3JE United Kingdom Tel: 020 7457 5000 Fax: 020 7457 5045 Chairman: Mr. Philip Maddox PhilipM@LeafieldEnv.com

The Nordic Association of Rotational Moulders Executive Board Chairman: Mr. Ronny Ervik ul. Zielona 8, 61-851 Poznan, Poland Tel: +48 607-126-004 Fax: +48 61-858-8611 info@rotomoulding-europe.org www.nordicrotomoulding.org www.rotomoulding-europe.org

Society of Asian Rotomoulders (StAR) 40/145, Ground Floor, Chittaranjan Park New Delhi 110019 Tel: + 91-11-41630157 Fax: +91-11-41634952 Mob: + 91- 9810305356 sb.zaman@staraisa.org arnacz@satyam.net.in www.starasia.org

www.rotoworldmag.com 59

GLOBAL

JULY 20-22, 2021

SEPTEMBER 21-23, 2021

CALENDAR

PLASTICS MATERIALS, PROCESSES, AND TESTING

ROTOPLAS 2021

PLASTINDIA

Pragati Maidan New Delhi, India www.plastindia.org 60 ROTOWORLD® JUNE-JULY 2021

MARCH 14-16, 2022

FEBRUARY 4-8, 2022

Pennsylvania College of Technology, Williamsport, PA pirc@pct.edu

Rosemont, Illinois USA rotomolding.org

ARM EXECUTIVE FORUM Omni Amelia Island Resort Amelia Island, FL rotomolding.org

GLOBAL

OCTOBER 19-26, 2022

NOVEMBER 7-10, 2022

CALENDAR

K – SHOW

Fairgrounds Düsseldorf, Germany www.k-online.com

ARM ANNUAL MEETING Westin Peachtree Plaza Atlanta, GA rotomolding.org

www.rotoworldmag.com 61

ADVERTISERS’

INDEX

14 Diversified Mold & Castings 19800 Miles Rd. Warrensville Hts., OH 44128-4118 USA 216.663.1814 | 888.642.1222 info@diversifiedmolds.com www.diversifiedmolds.com 64 ExxonMobil Chemical Co. PO Box 96126 West Springs Calgary, Alberta Canada, T3H 0L3 800.668.0177 kevin.c.jamieson@exxonmobil.com https://www.exxonmobilchemical.com /en/products-and-services/ polyethylene 7 Ferry Industries, Inc. 4445 Allen Road Stow, OH 44224-1093 USA 330.920.9200 sales@ferryindustries.com www.ferryindustries.com 17 JSJ Productions, Inc. 625 West Market St. Salinas, CA 93901 USA 512.894.4106 susan@jsjproductionsinc.com www.jsjproductionsinc.com 9, 28 Jerico Plastic Industries, Inc. 7970 Boneta Road Wadsworth, OH 44281 USA 330.334.5244 Minerva Plant: 330.868.4600 steve@jericoplastic.com www.jericoplastic.com 45 Maag / Reduction Engineering Scheer USA Headquarters 235 Progress Blvd.

Kent, OH 44240 USA 1.800.844.2927 /330.677.2225 Maag.KEN.Info@maag.com www.maag.com Europe Headquarters Ostring 19 63762 Grossostheim, Germany +49.6026.503.354 info@maag.com www.maag.com 62 ROTOWORLD® JUNE-JULY 2021

11 Matrix Polymers The Priory Orchard Hill Little Billing Northhampton, NN9 9AG United Kingdom +44.1604.789100 sales@matrixpolymers.com www.matrixpolymers.com 21 NOVA Chemicals 1555 Coraopolis Heights Road Moon Township, PA 15108 412.490.4311 Doug.Biela@novachem.com www.novachem.com 5 OREX Rotomoulding SP. Z O.O. Cieszyriska 6, 43-520 CHYBIE Poland +48 32 440 83 15 magda.wantola@orex.pl www.orex-rotomoulding.com 19 Polnac Lázaro Cárdenas, No. 49, Col. San Jerónimo Tepetlacalco, Tlalnepantla, Estado de México, Mexico C.P. 54090 +52.55.5362.5360 ext. 275 glenn@polnac.com www.polnac.com 27 Poliplast S.p.A. Via Carrali, 8 24020 Casnigo (BG) Italy +39.035.724145 info@poliplastspa.com www.poliplastspa.com 3 Powder King, LLC 41780 N. Vision Way Unit 120 Bldg. 2 Anthem, AZ 85086 USA 623.551.9897 sales@powder-king.com www.powder-king.com 2 Roto Polymers 26210 Emery Road, Suite 202 Cleveland, OH 44128 USA 1.844.POLIMER (1.844.765.4637) info@rotopolymers.com www.rotopolymers.com

63 Rotomachinery Group Via Crosa, 53 28065 Cerano (NO) Italy +39.0321.772021 polivinil@polivinil.com www.rotomachinerygroup.com 61 VMP, Inc. 24830 Avenue Tibbitts Valencia, CA 91355-3404 USA 888.4.VMP.INC 661.294.9934 info@vmpinc.com www.vmpinc.com 23 Wittmann Battenfeld Canada Inc. / ROTOLOADTM 35 Leek Crescent Richmond Hill, ON L4B 4C2, Canada 905.887.5355 Toll Free: 1.888.466.8266 info@wittmann-group.ca www.wittmann-group.ca

www.rotoworldmag.com 63

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VOLUME XVII, ISSUE 2 • JUNE-JULY 2021

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Small acts of kindness at work benefit the giver, the receiver, and the whole organisation Alex Fradera

Case Study of a Long-Term Filled Industrial Storage Tank – Prediction at 20 years (Part 3) Eric Lainé, Jean-Claude Grandidier, Eric Maziers, Steve Lewis, Rua Woller, and Alistair Bell