The following table provides more detailed information: PVC all models COA: Polyvinyl chloride is synthesized by bulk polymerization, suspension polymerization, emulsion polymerization, micro-suspension polymerization and so on. At present, suspension polymerization is the main method in the industry, accounting for about 80% ~ 90% of the ethylene production of polychlorinated Chemicalbook, followed by emulsion polymerization. The process of suspension polymerization is mature, the post-treatment is simple, the product purity is high, the comprehensive performance is good, and the product is widely used.