The raw material of PVC shaft wall pipe is polyvinyl chloride, which is a thermoplastic resin. It is called the four basic building materials together with steel, wood, and cement, and the five general-purpose resins together with PP, PE, ABS, and PS. It is a relatively large organic chlorine-consuming product in the chlor-alkali industry. In addition, other ingredients are added to enhance its heat resistance, toughness, ductility, etc. The upper layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the lower layer is back-coated adhesive. It is a kind of synthetic material that is well-loved, popular and widely used in the world today. Its global usage ranks second among various synthetic materials.
PVC can be divided into soft PVC and hard PVC. Among them, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for floors, ceilings and the surface of leather, but because soft PVC contains softener (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use is limited. Hard PVC does not contain softener, so it is flexible, easy to form, not brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value. The essence of PVC is a kind of vacuum blister film, which is used for the surface packaging of various panels, so it is also called decorative film and adhesive film, which is used in building materials, packaging, medicine and many other industries. Among them, the building materials industry accounts for a larger proportion of 60%, followed by the packaging industry, and there are several other small-scale applications.
