The material and function of PVC plastic board

PVC plastic board rod, the Chinese name is polyvinyl chloride rod. It is a non-crystalline material with flame retardant, good chemical stability, and only low tensile and cracking internal force. It is the first in my country and the second largest general synthetic resin in the world. material. PVC rods have excellent flame retardancy, abrasion resistance, chemical resistance, comprehensive mechanical properties, product transparency, electrical insulation and relatively easy processing. At present, PVC has become one of the most widely used plastics in the application field. It is widely used in industry, construction, agriculture, daily life, packaging, electricity, public utilities and other fields. Together with polyethylene (PE), polypropylene (PP), polystyrene (PS) and ABS, they are collectively referred to as the five general-purpose resins. .

PVC plastic has excellent electrical insulation and generally does not burn, but if it is placed on a flame, it can burn and release HCl, and it will self-extinguish after leaving the fire. PVC can work normally at minus 15 degrees to 60 degrees. It has good physical and chemical properties. It has very good acid and alkali resistance. It can be bonded and welded, but it is easy to soften. PVC is prone to decomposition when it comes in contact with steel and copper at a temperature of 200 degrees, and corrosive and irritating gases will escape. The melting temperature of PVC during processing is a very important process parameter. If this parameter is not appropriate, it will cause the problem of material decomposition. The flow characteristics of PVC are quite poor, and its process range is very narrow. Especially PVC materials with large molecular weight are more difficult to process, so PVC plastic materials with small molecular weight are usually used.