The Best Sewing Thread for Heavy Fabrics: Tips and Tricks
When it comes to sewing heavy fabrics like denim, canvas, or leather, choosing the right sewing thread is essential for ensuring durable, strong seams that can stand up to wear and tear. Heavy fabrics require specialized threads that can handle their weight, thickness, and texture. Using the wrong thread can result in weak seams that might easily break or fray, ruining your hard work. In this article, we'll explore the best options for heavy duty threads, tips for selecting the right one, and how to ensure your sewing project turns out beautifully.
What Makes a Thread "Heavy Duty"?
Heavy duty thread is designed to withstand the demands of thick, dense fabrics. Unlike regular sewing thread, heavy duty threads are made from stronger materials, like nylon or polyester, which allow them to handle the stress of tougher fabrics. These threads are thicker and more durable, offering excellent resistance against friction, abrasion, and wear. Whether you're sewing through several layers of fabric or working with coarse materials, a strong sewing thread will ensure the durability of your seams.
If you’re dealing with projects like upholstery, bags, or outdoor gear, choosing a heavy duty thread for sewing is essential. A regular thread may break or become frayed, especially under pressure, but a heavy duty or thick thread for sewing will hold strong throughout.
How to Choose the Best Thread for Heavy Fabrics
When selecting the right thread for heavy fabrics, there are a few factors to keep in mind to ensure you get the best results:
Thread Material
The material of the thread plays a crucial role in determining its strength and durability. Polyester is a common choice for heavy duty thread because it’s incredibly strong, resistant to UV damage, and can withstand the rigors of outdoor conditions. Nylon, on the other hand, is more elastic, making it a great choice for fabrics that may stretch or require more give, such as leather or spandex blends.
Thread Thickness
Heavy fabrics demand a thicker sewing thread. Opt for a thick sewing thread to ensure that the thread can adequately support the weight and texture of your materials. Thicker threads offer more strength and better abrasion resistance, which are important when working with tough, durable fabrics. You can often find heavy duty threads labeled specifically as "thick" or "strong," which can help guide your purchase.
Needle Size
Don’t forget to adjust your sewing machine needle when using a thick thread for sewing. A larger needle, typically size 90/14 or 100/16, will make it easier for the needle to pass through the thicker fabric and thread without causing damage or skipped stitches.
Thread Finish
The finish of the thread can affect its performance as well. For projects that require extra durability, consider a heavy duty thread with a waxed finish. The wax helps reduce friction during stitching, allowing for smoother movement through the fabric and minimizing the risk of thread breakage.
Popular Threads for Heavy Fabrics
Now that we’ve covered the essential factors to consider, let’s take a look at some of the best heavy duty threads available for sewing thick fabrics.
Kevlar® Sewing Thread
Kevlar® Sewing Thread is the ultimate choice for high-strength, durable stitching in extreme conditions. Perfect for leatherworking, outdoor gear, and military applications, it resists abrasion, moisture, and high temperatures. Trusted by the military, this thread is ideal for crafting, survival, and outdoor projects.
Key Features:
High Strength: Break strength of approximately 11.2 lbs.
Heat Resistant: Begins to decompose at 800°F, does not melt.
Durable: Abrasion-resistant, moisture-resistant, and odorless.
Versatile: Available in black, coyote brown, natural yellow, and OD green colors.
Long-Lasting: Approx. 8,000 yards per pound (Size: 30/3, Tex: 50).
Bonded Nylon Sewing Thread
Bonded Nylon Sewing Thread is a versatile and durable choice for heavy-duty repairs and crafting. Trusted by the military, it offers excellent resistance to moisture, abrasion, and chemicals, making it perfect for both outdoor and indoor projects that demand long-lasting strength.
Key Features:
High Strength: Breaking strength of approximately 11 lbs.
Durable: Resistant to abrasion, mildew, bleach, and UV damage.
Versatile: Available in black and white, and suitable for heavy-duty applications.
Military Grade: Made to military specifications for superior quality.
Heat Resistant: Withstands temperatures up to 445°F.
Tips for Sewing with Heavy Duty Thread
Using a strong sewing thread requires more than just selecting the right product; it also involves understanding a few techniques to ensure the best results. Here are some essential tips for sewing with heavy fabrics:
Adjust Stitch Length and Tension
When using heavy duty thread, make sure to adjust the stitch length on your sewing machine. A longer stitch length helps prevent the thread from breaking or bunching up in thick fabric. Additionally, adjusting the tension is key make sure it’s not too tight, as this can lead to thread snapping or puckering.
Pre-Test Your Seams
Before you begin your project, take a few test runs on scrap pieces of fabric. This will allow you to check the stitching tension and ensure the heavy duty thread feeds through smoothly. It's always better to fix issues before starting on the actual project.
Use a Heavy Duty Needle
A thick sewing thread requires a corresponding heavy-duty needle. Opt for a needle that can handle the increased thickness and stiffness of the fabric. A size 90/14 or 100/16 needle is typically best suited for heavy duty threads, as it helps prevent needle breakage and ensures clean stitching.
Don't Overload Your Machine
Sewing through multiple layers of heavy fabric can put a strain on your machine. Avoid sewing too quickly, and allow your machine to work at a steady pace. This will reduce the chances of skipped stitches or thread breakage.
Sewing Thread Suppliers
Finding a reliable supplier for your heavy duty sewing threads is crucial for ensuring the quality and availability of materials for your projects. Some well-known sewing thread suppliers provide high-quality threads for different fabric weights, from light cotton to thick canvas and leather. Suppliers often offer a variety of thread types, including thick sewing thread and heavy duty options, to meet your specific needs. Be sure to choose a supplier that offers consistency in product quality and customer support for troubleshooting.
FAQs
1. Can I use regular thread for heavy fabrics?
Regular sewing threads are not designed for heavy fabrics, and using them may result in weak seams or breakage. It’s best to use a strong sewing thread specifically designed for heavy-duty fabrics to ensure durability and performance.
2. What is the best type of thread for denim?
For denim and other heavy fabrics, polyester or nylon heavy duty threads are excellent choices. They provide the strength and durability needed to handle the tough material.
3. How do I adjust my machine for thick sewing thread?
When using thick thread for sewing, you should adjust your sewing machine’s tension and stitch length. Ensure your tension is set correctly to avoid thread snapping, and use a longer stitch length for a cleaner finish.
4. Can I use heavy duty thread for leather projects?
Yes, heavy duty thread is ideal for leather sewing projects. The strength and durability of thick sewing threads allow for the secure stitching of leather without worrying about the thread breaking or fraying.
5. How can I prevent thread breakage when sewing thick fabrics?
To prevent thread breakage, use the appropriate heavy duty thread, adjust your machine’s tension and stitch length, and use a larger needle size. Testing on scrap fabric before starting your project can also help identify any issues before sewing.
Final Thoughts
Choosing the right heavy duty thread for your projects will ensure strong, lasting seams that can handle the toughest fabrics. Whether you're working with canvas, leather, or denim, a high-quality, strong sewing thread will ensure your work holds up over time.
