High-strength polyester yarn is made of purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) through esterification or transesterification and polycondensation reactions. Material—Polyethylene terephthalate (PET), a fiber made by spinning and post-processing.

Polyester industrial yarn refers to a high-strength, coarse-denier polyester industrial filament with a fineness of not less than 550 dtex. According to its performance, it can be divided into high-strength and low-extension type (ordinary standard type), high-modulus and low-shrinkage type, high-strength and low-shrinkage type, and active type. Among them, high-modulus and low-shrinkage polyester industrial yarns are gradually replacing ordinary standard polyester industrial yarns in tires and mechanical rubber products due to their excellent properties such as high breaking strength, high elastic modulus, low elongation, and good impact resistance. ; High-strength and low-strength polyester industrial yarn has the characteristics of high strength, low elongation, high modulus, and high dry heat shrinkage. At present, it is mainly used as tire cord and conveyor belt, canvas warp, vehicle belt and conveyor belt; The low shrinkage type polyester industrial yarn shrinks slightly after being heated, and its fabric or woven rubber product has good dimensional stability and heat resistance stability, can absorb impact load, and has the characteristics of soft nylon. It is mainly used for coating fabrics. (Advertising light box cloth, etc.), conveyor belt weft, etc.; active polyester industrial yarn is a new type of industrial yarn, which has a good affinity with rubber and PVC, which can simplify the subsequent processing technology and greatly improve the quality of the product.