PCTG is an amorphous copolyester. It has good viscosity, transparency, color, chemical resistance, and stress whitening resistance. PCTG is particularly suitable for forming thick-walled transparent products. Its processing and molding performance is excellent. It can be designed in any shape according to the designer's intention. PCTG can use traditional extrusion, injection molding, blow molding and blister molding methods, and can be widely used in the board and sheet, high-performance shrink film, bottle and special-shaped material markets; PCTG can be used to produce toys, household utensils and medical supplies, etc.; it has passed the US FDA food contact standards and can be used in food, medicine and cosmetic packaging and other fields.