PET film is a film made of polyester (PET) by biaxial stretching technology. PET film is a kind of main product used by polyester in the non-fiber field. At present, they mainly refer to the film method made of polyethylene terephthalate polymer in the polyester family. Its English abbreviation is BOPET, and its full name is BOPET. Bioriented Stretching Polyester Film. The product is mainly made of polyester (PET) chips as raw material, and is a high-grade plastic film with excellent performance after biaxial stretching. It has high transparency, non-toxic and tasteless, high tensile strength and good stiffness. , Anti-burning, not easy to break, excellent electrical and optical functions, good oxygen and moisture resistance, cold resistance (-70 ° C), heat resistance (200 ° C), and excellent chemical resistance and shortening properties. . The product is mainly used in electrical, insulation, packaging, magnetic containers, film, video tape, floppy disk, film, video and entertainment software, etc., and its application is very common, such as bronzing film, aluminized film, printing film, packaging film, Packaging materials, composite materials, laser anti-counterfeiting trademarks, drawings, electrical cut-off plastics and capacitors, etc. In my country, PET films are mostly used in food packaging and electronic components, optical components, capacitors, etc., and also in magnetic materials such as audio tapes and computer recording tapes. With the gradual improvement of the life consumption level of the Chinese people and the establishment and improvement of regulations in the food, medical and other industries, PET film has a large market development potential in my country, and continues to grow at a rate of more than 10% per year. At that time, the average consumption level of polyester (BOPET) film in my country was 108g/person, that in Japan was 2600g/person, and the global average was 245g/person. The per capita consumption level in my country should reach the global per capita level, and the market demand for BOPET film should reach more than 336,000-350,000 tons per year.