What Is Polyester Filament Yarn?

Polyester filament yarn is made of polyester filament. Polyester is an important variety of synthetic fibers and is the trade name of polyester fibers in my country. It is a fiber-forming polymer made from purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG) through esterification or transesterification and polycondensation. - Polyethylene terephthalate (PET), fibers made by spinning and post-processing. The so-called polyester filament is a filament with a length of more than one kilometer, and the filament is wound into a ball.

The characteristics of polyester filament yarn

Strength: The strength of polyester fiber is nearly 1 times stronger than cotton and 3 times stronger than wool, so polyester fabric is strong and durable.

Heat resistance: It can be used at -70°C to 170°C, and it has the best heat resistance and thermal stability among synthetic fibers.

Elasticity: The elasticity of polyester is close to that of wool, and its wrinkle resistance exceeds that of other fibers. The fabric does not wrinkle and has good shape retention.

Abrasion resistance: The abrasion resistance of polyester is second only to nylon and ranks second among synthetic fibers.

Water absorption: Polyester has low water absorption moisture regain and good insulation performance, but due to low water absorption, high static electricity generated by friction, and poor natural adsorption of dyes, polyester is generally dyed by high temperature and high pressure dyeing.

Dyeability: Polyester itself lacks hydrophilic groups or dye acceptor parts, so the dyeability of polyester is poor. It can be dyed with disperse dyes or non-ionic dyes, but the dyeing conditions are relatively harsh.

The use of polyester filament yarn

Polyester is used as a clothing fiber, and its fabric can achieve wrinkle-free and non-ironing effects after washing. Polyester is often blended or interwoven with various fibers, such as cotton polyester, wool polyester, etc., and is widely used in various clothing and decorative materials. Polyester can be used in conveyor belts, tents, canvas, cables, fishing nets, etc. in industry, especially polyester cords for tires, which are close to nylon in performance. Polyester can also be used in electrical insulation materials, acid-resistant filter cloths, and pharmaceutical industrial cloths. Synthetic fibers have been widely used in various fields of the national economy because of their high strength, wear resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth retention, good electrical insulation and resistance to mold and moth.