PVC board: (1) Polyvinyl chloride (PVC) plastic is a polymer formed by free radical polymerization of vinyl chloride monomer. The English name is polyviny chloride, or PVC for short. PVC can be divided into soft PVC and hard PVC. Among them, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. (2) Hardness PVC celuka board : The quality of this product is in accordance...