Introduction and use of PVC


PVC is a non-crystalline, polar polymer with high softe […]

PVC is a non-crystalline, polar polymer with high softening temperature and melting temperature. Pure PVC generally needs to be plasticized at 160-210 °C. PVC display due to polar bonds between macromolecules. Hard and brittle performance. In addition, the chlorine-containing group in the PVC molecule easily causes the PVC to de-HCl reaction, thereby causing the PVC degradation reaction. Therefore, PVC is extremely unstable to heat and the temperature rises, which greatly promotes the dehydrochlorination of PVC. When the temperature reaches 12O ° C, pure PVC begins to dehydrogenate, resulting in thermal degradation of PVC. Therefore, in the processing of PVC, various additives must be added to process and modify the PVC and impact modification so that it can be processed into a useful product.

PVC resin is mainly used in the production of various types of film (such as daily printing film, industrial packaging film, agricultural greenhouse film and heat shrinkable film, etc.), various types of plates, sheets (the sheet can be used for plastic products), all kinds of pipes (such as non-toxic water pipes, construction threading pipes, transparent hoses, etc.), various profiles (such as doors, windows, decorative panels), hollow blowing bottles (for cosmetics and beverages), cables, all kinds of injection molded products and artificial leather , floor leather, plastic toys, etc.