CPVC the irregularity of the molecular bond of the plate increases, the polarity increases, the solubility of the resin increases and the chemical stability increases, which improves the heat resistance, acid resistance, alkali resistance, salt, oxidant and other corrosion of the material, and improves the mechanical properties of the numerical thermal deformation temperature. Compared with the general PVC, it has high temperature resistance, excellent corrosion resistance, stable size, easy processing and excellent flame retardancy.