The main classification of PVC materials

According to different application ranges, PVC can be divided into: general-purpose PVC resin, high-polymerization PVC resin, and cross-linked PVC resin. General-purpose PVC resin is formed by the polymerization of vinyl chloride monomer under the action of an initiator; high-polymerization PVC resin refers to the resin polymerized by adding a chain extender to the polymerization system of vinyl chloride monomer; cross-linked PVC resin is The resin is polymerized by adding a cross-linking agent containing diene and polyene to the polymerization system of vinyl chloride monomer.
According to the method of obtaining vinyl chloride monomer, it can be divided into calcium carbide method, ethylene method and imported (EDC, VCM) monomer method (it is customary to refer to ethylene method and imported monomer method as ethylene method).
According to the polymerization method, polyvinyl chloride can be divided into four categories: suspension method polyvinyl chloride, emulsion method polyvinyl chloride, bulk method polyvinyl chloride, solution method polyvinyl chloride. Suspension polyvinyl chloride is the largest variety, accounting for about 80% of the total PVC output. Suspension method PVC is divided into six models according to absolute viscosity: XS-1, XS-2...XS-6; XJ-1, XJ-2..., XJ-6. The meaning of each letter in the model: X-suspension method; S-loose type; J-tight type.
According to the content of plasticizer, PVC plastics are often divided into: non-plasticized PVC, plasticizer content is 0; rigid PVC, plasticizer content is less than 10%; semi-rigid PVC, plasticizer content 10-30%; soft PVC, the plasticizer content is 30-70%; polyvinyl chloride paste plastic, the plasticizer content is more than 80%.