2. PET film is the abbreviation of English Polyethylene terephthalate, abbreviated as PET or PETP. Chinese means: polyterephthalate plastics, mainly including polyethylene terephthalate PET and polybutylene terephthalate PBT. Polyethylene terephthalate is also commonly known as polyester resin. It is a polycondensate of terephthalic acid and ethylene glycol. Together with PBT, it is collectively referred to as thermoplastic polyester, or saturated polyester.
3. The molecular structure of PET film is highly symmetrical and has a certain crystal orientation ability, so it has high film-forming properties and properties. PET plastic has good optical properties and weather resistance, and amorphous PET plastic has good optical transparency. In addition, PET plastic has excellent wear resistance, friction, dimensional stability and electrical insulation. Bottles made of PET have high strength, good transparency, non-toxic, anti-permeation, light weight, high production efficiency, etc., so they have been widely used. The molecular chain structure of PBT and PET is similar, and most of the properties are the same, except that the main chain of the molecule has changed from two methylene groups to four, so the molecule is more flexible and the processing performance is better.
