Polyester chips is widely used in many fields, including fibers, bottles, films, etc. In the fiber field, polyester, as the main product of PET fiber, accounts for about half of the world’s synthetic fiber production. In the packaging field, PET bottles and films are the main non-fiber applications of PET, among which packaging is the largest non-fiber application market for polyester and also the fastest growing field for PET. In addition, PET is also used in electronics, medical and health, construction, automobiles and other fields.
The production process of PET resin involves raw material preparation, polymerization, extrusion and molding. The main raw materials are terephthalic acid and ethylene glycol, which are formed into PET resin through transesterification and polymerization.
The polymerization reaction is carried out under high temperature and high pressure conditions, and it is necessary to add a catalyst and control the reaction parameters such as temperature, pressure and conversion rate. Finally, after extrusion molding and injection molding, blow molding and other molding processes, a series of PET products of various shapes are made.