The origin of PVC
Polyvinyl chloride comes from a chemical gas called vinyl chloride. When vinyl chloride is exposed to sunlight, it will react. This reaction, called polymerization, is transformed into a white solid substance. In order to realize the molding and firmness of PVC pipes, a series of chemicals are introduced into each other and natural gas is heated to produce ethylene. This process is called cracking, and then sodium chloride (in the form of rock salt) is electrolytically spliced to produce chlorine, lye and sodium hydroxide.
The general process of PVC is to crush plastic particles, mix them with a certain proportion of lime powder and glue, and then press them with a hot press.