The four-step plasticization theory of PVC

In the first step, the plasticizer enters the pores of the PVC resin particles; in the second step, the surface of the resin particles is swelled by the plasticizer, and at the same time, the inside of the particles is strained; in the third step, all the particles are swollen and plasticized by the plasticizer The agent is dispersed between the macromolecules. The first three steps of the plasticization process should be as complete as possible during the powdering process. In the fourth step, the mixture of PVC, plasticizer and other additives is heated to a molten state to form a uniform soft PVC Material, and finally complete the plasticization process.

PVC plasticizers are widely used in coatings, PVC plastic particles, unfilled calendered films, artificial leather, cable materials, plates, sheets, soft and hard pipes, sole materials, rubber and plastic strips, foam materials, films, and flame-retardant conveyor belts. It is especially suitable for all products that use plasticizers, such as PVC plastic steel doors and windows, PVC profiled materials, PVC plates, decorative materials, and foamed hard boards.