In addition to conventional PVC resin, there is also a type of chlorinated CPVC resin, which is a new type of engineering plastic. The molecular bond irregularity and polarity of CPVC resin increase, resulting in improved solubility, chemical stability, and heat resistance. The thermal deformation temperature, Vicat softening temperature, and maximum operating temperature of CPVC resin are higher than those of conventional PVC resin, so it has a wider application prospect.