Polyester fiber, commonly known as "polyester". It is a synthetic fiber obtained by spinning a polyester obtained by polycondensation of an organic dibasic acid and a glycol, and is referred to as a PET fiber, and is a polymer compound. The biggest advantage of polyester fiber is that it has good wrinkle resistance and shape retention, and has high strength and elastic recovery ability.
Application：
Polyester fibers have high strength, high modulus, and low water absorption, and are widely used as both civil and industrial fabrics.
Performance：
1. Thermal performance. The softening point T is 230-240 ° C, the melting point Tm is 255-265 ° C, and the decomposition point T is about 300 ° C.
2. Lightfastness. Its light resistance is second only to acrylic. After 60 hours of sunlight exposure, the strength lost only 60%, which is close to cotton.
3. Electrical performance. Polyester is low in moisture permeability, so its conductivity is poor. The dielectric constant in the range of -100 to +160 °C is 3.0 to 3.8, which is an excellent insulator.