Polyvinyl chloride, referred to as PVC, is a thermoplastic resin polymerized by vinyl chloride monomer under the action of an initiator. It is a homopolymer of vinyl chloride. The appearance is white powder, non-toxic and odorless. As one of the important organic synthetic materials, PVC resin has good physical and chemical properties, such as heat resistance, cold resistance, corrosion resistance, insulation, and flame retardancy. Therefore, PVC resin is widely used in construction, electronics, automobiles, medical care, packaging and other fields.