CPVC resin of polyvinyl chloride (PVC) resin-modified, is a new type of engineering plastics. This product is white or pale yellow odorless loose granular or powder, odorless, nontoxic. After chlorination of PVC resin, bond irregularities increased polarity increases, increases the solubility of resin, chemical stability increases, thus increasing the material's heat resistance, acid, alkali, salt, antioxidant and other corrosion. Improves the mechanical properties of numerical heat distortion temperature, chloride concentrations increased from 56.7% to 63-69%, Vicat softening temperature 72-82 ℃, (up to 90-125), maximum service temperature up to 110 ° c, temperature 95 ℃ long-term use.