PE is short for polyethylene. Polyethylene is a thermoplastic resin prepared by ethylene polymerization. In industry, it also includes ethylene and a small amount of α -olefin polymer, which is a transparent plastic bag and can be used to package clothes, bags, electronic products and so on. Polyethylene can be divided into high density polyethylene, low density polyethylene and linear low density polyethylene according to polymerization method, molecular weight and chain structure. Polyethylene is very sensitive to environmental stress (chemical and mechanical effects), and its thermal aging resistance is worse than that of polymer chemical structure and processing belt. Polyethylene can be processed by molding ordinary thermoplastics. Widely used in the manufacture of films, packaging materials, containers, pipes, monofilaments, wires and cables, daily necessities and so on. , which can be used as high-frequency insulating material for TV and radar.
Polyethylene can be divided into high pressure method, medium pressure method and low pressure method according to polymerization pressure. High-pressure method is used to produce low-density polyethylene, which was developed earlier. With the development of production technology and catalyst, its growth rate has lagged far behind that of low-pressure method. As far as the implementation methods of low pressure method are concerned, there are slurry method, solution method and gas phase method. Slurry method is mainly used to produce high density polyethylene, while solution method and gas phase method can not only produce high density polyethylene, but also produce medium and low density polyethylene by adding monomers, also known as linear low density polyethylene.