PVC can be divided into soft PVC and hard PVC. The hard PVC accounts for about 2/3 of the market, and the soft PVC accounts for 1/3. Commonly used in soft PVC floor, ceiling, and the surface of leather, but because of the soft PVC contains softening agent (which is the difference between the soft PVC and hard PVC), easy to brittle, not easy to save, so its use range was limited. Hard PVC contains no softener, so it is flexible, easy to form, not brittle, non-toxic and pollution-free, and has a long shelf life. Therefore, it has great development and application value. The following is referred to as PVC. Soft PVC is mainly used for vacuum blister film, which is used for the surface packaging of various kinds of panels, so it is also called decorative film and adhesive film, which is applied in many industries, such as building materials, packaging, medicine and so on. Among them, building materials industry accounted for the largest proportion, 60 percent, followed by packaging industry, and other industries with small scope applications.
Simply put, the aqueous solution of the salt is chemically decomposed by the action of the current. This process produces chlorine, caustic soda and hydrogen. Refining, cracking oil or gasoline produces ethylene. When chlorine is mixed with ethylene, it produces dichloroethylene; Dichloroethylene can also be converted into vinyl chloride, which is an essential part of polyvinyl chloride. The polymerization process binds the vinyl chloride molecules together to form a polyvinyl chloride chain. The polyvinyl chloride produced in this manner is in white powder. It can't be used alone, but it can be mixed with other ingredients to produce a lot of products.