What is PVC composite door?
PVC板热吸塑成型的复合门，是将实木复合门或模压门最外面采用PVC贴面真空吸塑加工工艺而成。
The composite door formed by PVC panel thermal plastic absorption is made of solid wood composite door or molded door with PVC veneer vacuum plastic absorption processing technology.
PVC材料在实际使用中经常加入稳定剂、润滑剂、辅助加工剂、色料、抗冲击剂及其它添加剂。具有不易燃性、高强度、耐气侯变化性以及优良的几何稳定性。
PVC materials are often added with stabilizers, lubricants, auxiliary processing agents, pigments, impact agents and other additives in actual use. It has non-flammability, high strength, weather resistance and excellent geometric stability.
PVC对氧化剂、还原剂和强酸都有很强的抵抗力。然而它能够被浓氧化酸如浓硫酸、浓硝酸所腐蚀并且也不适用与芳香烃、氯化烃接触的场合。
PVC has strong resistance to oxidant, reducing agent and strong acid. However, it can be corroded by concentrated oxidizing acid, such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for occasions where it is in contact with aromatic hydrocarbons and chlorinated hydrocarbons.
PVC为无定形结构的白色粉末，支化度较小，相对密度1.4左右，玻璃化温度77~90℃，170℃左右开始分解 ，对光和热的稳定性差。
PVC is a white powder with amorphous structure, low branching degree, relative density of about 1.4, glass transition temperature of 77~90 ℃, decomposition of about 170 ℃, and poor stability to light and heat.
在100℃以上或经长时间阳光曝晒，就会分解而产生氯化氢，并进一步自动催化分解，引起变色，物理机械性能也迅速下降，在实际应用中必须加入稳定剂以提高对热和光的稳定性。
When it is above 100 ℃ or exposed to the sun for a long time, it will decompose to produce hydrogen chloride, and further autocatalytic decomposition will cause discoloration, and the physical and mechanical properties will also decline rapidly. In practical applications, stabilizer must be added to improve the stability of heat and light.
PVC曾是世界上产量最大的通用塑料，应用非常广泛。在建筑材料、工业制品、日用品、地板革、地板砖、人造革、管材、电线电缆、包装膜、瓶、发泡材料、密封材料、纤维等方面均有广泛应用。
PVC used to be the largest general plastic in the world and has been widely used. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc.
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