What is polyester material？

Polyester, a general term for polymers obtained by polycondensation of polyols and polyacids. Mainly refers to polyethylene terephthalate (PET), and customarily also includes linear thermoplastic resins such as polybutylene terephthalate (PBT) and polyarylate. It is a class of engineering plastics with excellent properties and a wide range of uses. It can also be made into polyester fiber and polyester film. Polyester includes polyester resin and polyester elastomer. Polyester resins include polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyarylate (PAR). Polyester elastomer (TPEE) is generally polymerized by dimethyl terephthalate, 1,4-butanediol and polybutanol. The chain segment includes a hard segment and a soft segment, and is a thermoplastic elastomer.

Applications

Polyethylene terephthalate (PET) is a polymer compound. Polyethylene terephthalate (PET) is produced by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG), and part of the PET is finally produced through underwater pelletizing.

Fiber-grade polyester chips are used to make polyester staple fibers and polyester filaments. They are the raw materials for polyester fiber companies to process fibers and related products. As the most produced variety of chemical fibers, polyester occupies nearly 80% of the market share in the chemical fiber industry. The market changes and development trends of the polyester series are the focus of the chemical fiber industry.

At the same time, polyester is also used in bottles and films, which are widely used in the packaging industry, electronic appliances, medical and health, construction, automobiles and other fields. Among them, packaging is the largest non-fiber application market for polyester, and it is also the fastest growing field of PET. . It can be said that polyester chips are an important intermediate product that connects petrochemical products and products in multiple industries.