CPVC is a new type of engineering plastics with broad application prospects. Resin made of polyvinyl chloride (PVC) resin modified chlorinated resin is a new type of engineering plastics. The product is white or light yellow tasteless, odorless, non-toxic loose particles or powder. PVC resin after chlorination, the molecular bond irregularities increase, the polarity increases, the solubility of the resin increases, the chemical stability increases, thereby increasing the material's heat resistance, acid, alkali, salt, oxidants, etc. corrosion. Increased the mechanical properties of the numerical heat distortion temperature, the chlorine content increased from 56.7% to 63-69%, Vicat softening temperature from 72-82 ℃, increased to 90-125 ℃, the maximum temperature up to 110 ℃, long-term use The temperature is 95 ° C. Which CORZAN CPVC performance index is better.