How to join two pieces of flat polyester cord?

Joining two pieces of flat polyester cord can be a crucial skill, especially for those in industries that rely on this versatile material. As a leading supplier of Flat Polyester Cord, I've witnessed firsthand the diverse applications and the need for effective joining methods. In this blog, I'll share some of the most reliable techniques to help you achieve a strong and durable connection.

Understanding Flat Polyester Cord

Before delving into the joining methods, it's essential to understand the characteristics of flat polyester cord. Polyester is a synthetic fiber known for its strength, durability, and resistance to abrasion, moisture, and chemicals. Flat polyester cord, in particular, offers a wider surface area compared to Round Polyester Cord, making it ideal for applications where a broader contact area is required, such as in sewing, crafting, and industrial uses.

Factors to Consider Before Joining

Cord Thickness: The thickness of the flat polyester cord can affect the joining method you choose. Thicker cords may require more robust techniques, while thinner cords can be joined using simpler methods.
Application: Consider the intended use of the joined cord. If it will be subjected to high stress or tension, a stronger joining method is necessary. For decorative or low-stress applications, a less permanent method may suffice.
Aesthetics: In some cases, the appearance of the join may be important. Choose a method that will result in a neat and professional-looking connection.

Joining Methods

1. Knotting

Knotting is one of the simplest and most common ways to join two pieces of flat polyester cord. There are several types of knots that can be used, depending on the level of strength required.

Square Knot: This is a basic knot that is easy to tie and provides a moderate level of strength. To tie a square knot, cross the two ends of the cord over each other, then bring the left end over the right end and through the loop. Repeat the process with the right end over the left end. Pull the ends tight to secure the knot.
Double Fisherman's Knot: This knot is stronger than the square knot and is suitable for applications where a high level of strength is required. To tie a double fisherman's knot, overlap the two ends of the cord and make a loop with one end. Pass the other end through the loop twice, then pull the ends tight to form the knot.

2. Sewing

Sewing is another effective way to join two pieces of flat polyester cord. This method provides a strong and permanent connection and allows for a more precise and professional-looking finish.

Flat Polyester Cord (2) Round polyester cord (2)

Straight Stitch: Use a straight stitch to sew the two ends of the cord together. Start by folding the ends of the cord over each other and securing them with a few stitches. Then, sew along the length of the overlap, using a tight and even stitch.
Zigzag Stitch: A zigzag stitch can be used to reinforce the join and prevent the cord from fraying. Sew a zigzag stitch along the edge of the overlap, making sure to cover the entire length of the join.

3. Gluing

Gluing is a quick and easy way to join two pieces of flat polyester cord. However, it may not be as strong as other methods and may not be suitable for applications where the cord will be subjected to high stress or tension.

Fabric Glue: Choose a fabric glue that is specifically designed for use with polyester. Apply a small amount of glue to the ends of the cord, then press them together firmly. Hold the ends in place for a few minutes to allow the glue to dry.
Epoxy Resin: Epoxy resin provides a stronger and more permanent bond than fabric glue. Mix the epoxy resin according to the manufacturer's instructions, then apply it to the ends of the cord. Press the ends together firmly and hold them in place until the resin has cured.

4. Heat Sealing

Heat sealing is a method that uses heat to melt the polyester fibers and fuse the two ends of the cord together. This method provides a strong and permanent connection and is suitable for applications where a waterproof or airtight seal is required.

Heat Gun: Use a heat gun to apply heat to the ends of the cord. Hold the heat gun about 2-3 inches away from the cord and move it back and forth until the fibers start to melt. Press the ends of the cord together firmly and hold them in place until the fibers have cooled and solidified.
Soldering Iron: A soldering iron can also be used to heat seal the cord. Heat the tip of the soldering iron and touch it to the ends of the cord, melting the fibers. Press the ends together firmly and hold them in place until the fibers have cooled and solidified.

Tips for a Successful Join

Prepare the Cord: Before joining the cord, make sure to trim the ends neatly and remove any frayed or damaged fibers.
Use the Right Tools: Choose the appropriate tools for the joining method you are using. For example, use a sharp needle and thread for sewing, and a high-quality glue or epoxy resin for gluing.
Test the Join: Before using the joined cord in a real application, test the strength of the join by pulling on the cord gently. If the join fails, try a different method or reinforce the existing join.
Practice: Joining flat polyester cord takes practice. Start with small pieces of cord and experiment with different joining methods until you find the one that works best for you.

Conclusion

Joining two pieces of flat polyester cord is a skill that can be mastered with practice and the right techniques. By understanding the characteristics of the cord, considering the factors before joining, and choosing the appropriate method, you can achieve a strong and durable connection that will meet your needs. As a Flat Polyester Cord supplier, I'm always here to provide you with high-quality products and expert advice. If you have any questions or need further assistance, please don't hesitate to contact me for a procurement discussion.