PET is a thermoplastic polymer, which is made by polycondensation of terephthalic acid and ethylene glycol. It is made from terephthalic acid and ethylene glycol through polycondensation reaction. PET film is a kind of sheet material made from PET through melt extrusion, stretching and other processes. Because of its excellent physical and chemical properties, it has a wide range of applications in packaging, electronics, construction and many other fields. PET film features：
- High strength and toughness: PET film has high mechanical strength and tear resistance.
- Good temperature resistance: able to be used in a wide range of temperatures without deformation or damage.
- High transparency: clear and transparent, light transmittance can reach more than 90%.
- Strong barrier: It has a good barrier effect on oxygen, moisture, etc.,.
- good chemical stability: not easily eroded by common organic solvents, and has a certain degree of acid and alkali resistance.
