What are the special uses of polyester filament

Polyester filament is made of polyester, which is an important variety of synthetic fibers. It is made of purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG), and polyester hot-melt filament is obtained by esterification or transesterification and polycondensation. Fiber high polymer - polyethylene terephthalate (PET), fiber 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 group.
First, the characteristics of polyester filament
Strength: The strength of the polyester fiber is nearly 1 times higher than cotton and 3 times higher than wool, so the polyester fabric is strong and durable.
Heat resistance: It can be used at -70℃~170℃, which is 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 and moisture regain and good insulation performance, but due to low water absorption, large static electricity generated by friction, and poor natural adsorption performance of dyes, polyester is generally dyed by high temperature and high-pressure dyeing method.
Dyeability: Polyester itself lacks hydrophilic groups or dye acceptor parts, so polyester has poor dyeability. It can be dyed with dispersed dyes or non-ionic dyes, but the dyeing conditions are relatively harsh.
Second, the use of polyester filament
Polyester is used as a clothing fiber, and its fabrics are wrinkle-free and iron-free 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 for conveyor belts, tents, canvas, cables, fishing nets, etc. in industry, especially polyester cord used for tires, which is close to nylon in performance. Polyester can also be used for electrical insulating materials, acid-resistant filter cloth, medical industrial cloth, etc. Synthetic fibers have been widely used in various fields of the national economy due to their high strength, wear resistance, acid resistance, alkali resistance, high-temperature resistance, lightweight, warmth retention, good electrical insulation, and resistance to mildew.