Polyethylene is a polymer organic compound with a simple structure and is widely used. Polyethylene is a wide range of polymer materials, made of ethylene polymerization, divided into high-density polyethylene, medium-density polyethylene and low-density polyethylene according to different densities. Polyethylene is a thermoplastic resin produced by polymerization of ethylene, which has the characteristics of odorless, non-toxic, and feels like wax. It also has excellent low temperature resistance, good chemical stability, and can resist most acid and alkali erosion. Insoluble in general solvents at room temperature, small water absorption, excellent electrical insulation.