It is a soft film with high transparency and elasticity. It has high tensile strength, tear strength and good puncture resistance. The linear low-density polyethylene (LLDPE) is used as the main raw material, and a small amount of auxiliary materials are uniformly mixed, melted and plasticized by the extrusion system, and then made by a single layer, double layer or three-layer co-extrusion flow process through the machine head and the molding die. A new type of packaging material. PE stretch film has good vertical and horizontal two-way cold drawing characteristics, and has large retractability, long-lasting tightening force, single-sided or double-sided self-adhesiveness, and suitable breathable moisture permeability. Relying on its own viscosity, the stretch film is mainly used for tray transport packaging, bulk packaging of various large or various scattered items, and food refrigerated packaging for households and supermarkets, as well as household appliances, precision instruments, bicycles, motorcycles. The packaging of high-end furniture and other products can keep the packaged articles in tension for a long time without looseness. As a new type of packaging material, PE wrapping film has a simple packaging process, which can be both manual and mechanical. It simplifies the packaging process and equipment, has good safety performance, and has the advantages of waterproof, dustproof and intuitive appearance. PE winding film is a kind of green environmental protection material, non-toxic and harmless, widely used in food, beverage, pharmaceutical and other industries.