Polyester is used as clothing fiber, and its fabric can achieve the effect of no wrinkle and ironing 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. In industry, polyester can be used for conveyor belts, tents, canvas, cables, fishing nets, etc., especially polyester cord used for tires, and its performance is close to nylon. Polyester can also be used for electrical insulation materials, acid-resistant filter cloth, cloth for the medical industry, etc. Synthetic fibers are widely used in various fields of the national economy because of their high strength, abrasion resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth retention, good electrical insulation and resistance to mildew.