1. Pet material, English name Polyethylene terephthalate, commonly known as polyester resin, is the most important variety in thermoplastic polyester.
2. Polyethylene terephthalate is the most important variety of thermoplastic polyesters. The English name is Polyethylene terephthalate, abbreviated as PET or PEIT (hereinafter referred to as PET), commonly known as polyester resin. The molar mass of the repeating unit is 192 g/mol. It is a polycondensate of terephthalic acid and ethylene glycol, and together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester.
3. In 1946, the United Kingdom issued the first patent for the preparation of PET. In 1949, the British ICI formula completed the pilot test, but after the DuPont Company of the United States purchased the patent, a production device was established in 1953, which was the first industrialized production in the world. In the early days, PET was almost used for synthetic fibers (commonly known as polyester in my country, which is really good).
4. Since the 1980s, PET has made a breakthrough as an engineering plastic, and nucleating agents and crystallization accelerators have been developed successively. PET and PBT, together as thermoplastic polyesters, have become one of the five major engineering plastics.
