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Polypropylene for PP, is a colorless, odorless, non-toxic, translucent solid material.Polypropylene (PP) is a good performance of thermoplastic synthetic resin, is a colorless translucent thermoplastic lightweight universal plastic.With chemical resistance, heat resistance, electrical insulation, high strength mechanical properties and good abrasion resistance, polypropylene has been rapidly developed and applied in many fields such as machinery, automobiles, electronic appliances, construction, textile, packaging, agriculture, forestry, fishery and food industry since it came into being.In recent years, with the rapid development of China’s packaging, electronics, automobile and other industries, greatly promote the development of China’s industry.And because of its plasticity, polypropylene is gradually replacing wooden products, and high strength, toughness and high wear resistance have gradually replaced the mechanical function of metal.
Polypropylene resin is one of the four general thermoplastic resins (polyethylene, polyvinyl chloride, polypropylene, polystyrene).
The production process of polypropylene mainly went through several development stages of solvent method, solution method, liquid phase bulk method (combined with liquid phase and gas phase) and gas phase method.The process methods used to produce polypropylene in the world are mainly divided into the following categories: solvent method, solution method, liquid phase bulk method (including liquid phase combination) and gas phase method.