Common characteristics of polyester yarn, high strength. Due to its low hygroscopicity, its wet strength and dry strength are basically the same. The impact resistance is 4 times higher than nylon and 20 times higher than viscose fiber. Good flexibility. The elasticity is close to that of wool, and it can almost completely recover when stretched 5-6. The wrinkle resistance exceeds that of fibers, that is, the fabric does not wrinkle and has good dimensional stability. Good heat resistance. Polyester has a smooth surface, tightly arranged internal molecules, and lack of hydrophilic structure between the molecules, so the moisture regain is small and the moisture absorption performance is poor.