CPVC is a new type of engineering plastic with broad application prospects. The resin is made by chlorination modification of polyvinyl chloride (PVC) resin. It is a new type of engineering plastic. The product is white or light yellow odorless, odorless, non-toxic loose particles or powder. After the PVC resin is chlorinated, the irregularity of molecular bonds increases, the polarity increases, the solubility of the resin increases, and the chemical stability increases, thereby improving the material's heat resistance, acid, alkali, salt, oxidant, etc. corrosion. The mechanical properties of the resin’s thermal deformation temperature are improved, the chlorine content is increased from 56.7% to 63-69%, the Vicat softening temperature is increased from 72-82 ℃ to 90-125 ℃, and the maximum use temperature can reach 110 ℃, long-term use The temperature is 95 ℃. Among them, CORZAN CPVC has better performance indicators.