The special-shaped backboard is made of PVC board. PVC board is a kind of vacuum adsorption board with honeycomb network structure, which is formed by free radical polymerization of vinyl chloride monomer of polyvinyl chloride (PVC) plastic. The manufacturing process of the board is divided into PVC skin foamed board and PVC free foamed board. The invention has the characteristics of durability, long service life, water resistance, acid and alkali resistance, moth resistance, flame retardancy, light weight, sound insulation, heat preservation, strong processability and convenient use.

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.