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Using Spun Polyester Sewing Thread On Overlocker Machine

Filament Thread

Polyester sewing thread is made of polyurethane polyester staple fiber as raw material. It has high strength, good elasticity, wear resistance, low shrinkage and good chemical stability.

Polyester staple fiber is a fiber obtained by cutting polyester into tows after being re-spun. Polyester staple fiber is actually polyester fiber (PET), which is a short fiber generated by polymerizing PTA and ethylene glycol.

Spun polyester thread is made from a combination of long and short polyester fibers that are twisted together to create a thread. It is commonly used for sewing projects such as apparel, home décor, and quilting. Spun polyester thread is more affordable than other types of threads such as polyester core-spun, which contains a polyester core wrapped with a cotton or polyester outer layer.

Main uses of polyester staple fiber sewing thread

  1. Spinning. Mainly used for pure polyester yarn and blended yarn, the main specifications are semi-gloss 1.4D, semi-gloss 1.2D, glossy 1.2D, etc.;
  2. Fill. Mainly used in home textiles, toys, sofas, etc., the main specifications include 3D, 6-15D and other hollow staple fibers;
  3. Non-woven. It is mainly used in spunlace, needle punch and other non-woven fabrics. The main specifications include spunlace 1.4D, 2-2.5D and other coarse denier fibers, and 4D low melting point fiber.

Can Spun Polyester sewing Thread Be Used on Overlocker Machine

Sewing with overlocker machine requires the use of the right type of thread, which can be confusing for beginners.

Spun polyester sewing thread is a popular choice for sewing projects due to its affordability and availability. spun polyester thread can be used on overlocker machine. However, you must use the appropriate needle and tension settings to ensure that the thread feeds smoothly through the machine.

Choosing the Right Needle for Spun Polyester Thread

When using spun polyester thread on a serger/overlocker machine, it’s crucial to choose the appropriate needle. A ballpoint or stretch needle is suitable for use with spun polyester thread, as it has a rounded tip that can slide between the fibers without breaking them. If you are sewing with a heavy or dense fabric, choose a needle with a larger size to accommodate the thread and fabric thickness.


Polyester staple fiber sewing thread has the characteristics of high strength, good elasticity, wear resistance, low shrinkage and good chemical stability.

Polyester staple fiber sewing thread is mainly used for industrial sewing of jeans, sportswear, leather products, wool and military uniforms. It is currently the most commonly used and popular sewing thread.