1. What is PVC?
PVC (polyvinyl chloride) is the initiator of vinyl chloride monomer (VCM) in peroxides, azo compounds, etc. Or a polymer polymerized under the action of light and heat according to a free radical polymerization mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin.
Second, the classification of PVC
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 leather surfaces, but it is easy to become brittle and difficult to store because of its softener, so its application scope is limited. Rigid PVC contains no softener, so it is flexible, easy to form, not easy to crack, non-toxic and pollution-free, and has long storage time, which is of great development and application value.
Third, the main advantages of PVC materials
This material is light, waterproof and moisture-proof. Different from the plastics we see every day, PVC also has the characteristics of flame retardant and heat insulation. PVC material has stable physical and chemical properties, is insoluble in water, alcohol and gasoline, and has low gas and water vapor leakage. It can resist any concentration of hydrochloric acid, less than 90% sulfuric acid, 50-60% nitric acid and less than 20% caustic soda solution at room temperature, and has certain chemical corrosion resistance; It is quite stable to salt, but soluble in organic solvents such as ether, ketone, chlorinated aliphatic hydrocarbon and aromatic hydrocarbon.