BANDERA AT K'2013 FAIR Innovative technology of blown film extrusion – 5-layer running line BOOTH N.C06 HALL 17
At the K fair in Dusseldorf this October, Bandera’s participation will include a large stand containing an innovative 5-layer blown film co-extrusion line. This line will demonstrate the current technology for producing symmetrical 5 layer structures in white and black film, using coPA or EVOH as the middle layer, and lamination for flexible packaging applications. For the fair Bandera has taken up the challenge of showing the most versatile line possible, combining good outputs with very severe thickness tolerances. The line will be running different production settings and with a wide range of plastic materials, meeting the requirement of frequent production changes. Thus, Bandera will show the chosen 5-layer configuration is the ideal solution for the user who needs to get both PE film and Barrier film on the same line (with symmetrical and asymmetrical structures). In detail, the line being shown is composed of: - Raw material dosing units with loss in weight continuous metering systems for each extruder, able to work with up to 20 components together; - Extrusion hardware with a middle single-screw extruder (mod.TR 50) and four side single screw extruders (mod.TR 65), all with low energy consumption AC motors, bimetallic barrels and thermoregulated feeding zones; - A co-extrusion spiral die head with side feeding and a 400 mm Ø die. The innovative design of the inside flow distributors allows optimal results in output at low pressure and above all it allows a very fast material change, either with blends or with master-batch. An advanced bubble cooling system (IBC), with devoted management software and equipped with 8 different sensors, analyses all the parameters, including atmospheric conditions, thus allowing management of the proportional IBC control valve through the software (integrated in the Bandera line supervisor). Overall this assures total bubble stability and precise film width control, producing perfect reels without the need for trimming and so avoiding scrap;