PE protective film PE, whose full name is Polyethylene, is the simplest structural polymer organic compound and the most widely used polymer material in the world today. PE protective film uses special polyethylene (PE) plastic film as the base material and is divided into high-density polyethylene protective film, medium-density polyethylene and low-density polyethylene according to density.

The biggest advantage of PE protective film is that the protected product is not contaminated, corroded, scratched during production, processing, transportation, storage and use, and protects the original smooth and shiny surface, thereby improving Product quality and market competitiveness.

PET film has excellent mechanical properties. Its strength and toughness are the best among all thermoplastic plastics. Its tensile strength and impact strength are much higher than ordinary films; it has good stiffness and stable dimensions, and is suitable for Secondary processing such as printing and paper bags.

PET film also has excellent heat resistance, cold resistance, good chemical resistance and oil resistance. However, it is not resistant to strong alkali and is easily charged with static electricity. There is no appropriate anti-static method, so attention should be paid when packaging powdery items. With the development of special functional films, new uses for polyester films are also emerging. It can be produced into mobile phone LCD protective film, LCD TV protective film, mobile phone buttons, etc. Extended information

The density is about 0.92g/cm3. Low-density polyethylene film has good transparency and heat-sealing properties, and can be waterproof and moisture-proof; it has low tensile strength, high tensile elongation, and is easy to wrinkle. For films below 0.03mm, the tension control should be small and the tension should be kept everywhere. It should be constant, especially when it is heated, it is more likely to deform, causing difficulty in color registration. Therefore, when drying, the surface temperature of the film should not be too high (within 55 degrees).

According to different film forming processes, it can be divided into blown film (IPE), cast film (CPE), low foaming film, etc. The tensile strength and opening of IPE film are better than that of CPE film. It can be printed on the front and can be used as food bags, clothing bags, etc.; CPE film has uniform thickness, better surface gloss, transparency and heat sealability than PE, and can be printed on both sides. But the production cost is high. CPE film is mainly used as the inner layer of composite bags and packaging of cosmetics, pickles and pastries; low-foaming film has good decorative properties, thick texture, and is not easy to stretch and deform. It is printed on the front and used as New Year pictures, trademarks and handbags.

Reference material PE film_Baidu Encyclopedia