As a kind of printing material, plastic film has a relatively short history. It is printed as a package and has light and transparent, moisture-proof, anti-oxidation, air-tightness, toughness and folding resistance, smooth surface, protection of goods, and reproduction of goods. The shape, color and other advantages. With the development of the petrochemical industry, there are more and more varieties of plastic film. The commonly used plastic films are polyethylene (PE), polyvinyl chloride (PVC), polystyrene, polyester film (PET), polypropylene (PP). , nylon, etc.