PETG is a new transparent engineering plastic with excellent comprehensive performance and easy molding. It is a new generation of environmentally friendly plastics. At present, there are few domestic researches on PETG. However, the performance requirements of various industries are getting higher and higher, and the rapid development of related industries has promoted the development of PETG. In short, the good use and processing properties of copolyester make it have broad application prospects in the fields of daily necessities, cosmetics, medical industry and toy industry.