PVC (PolyVinylChloride PVC ) generally has 7 grades (SG1-SG7 ) according to the hardness and performance of the material , and the density is about 1.4 g/cm3. The following SG4 is generally a soft product. When molding, a large amount of plasticizer is required. It is mainly used to produce artificial leather, wire and cable insulation, and seals. Above SG5 is a hard product, mainly used for making various kinds of pipes, such as drainage, electrician, post and telecommunication pipes and fittings, all kinds of plates, sheets, profiles and so on. PVC molding shrinkage rate of 0.6-1.5%, has good mechanical properties, its excellent electrical properties, and have self-extinguishing, strong acid and alkali resistance, good chemical stability, low price, is a very wide range of applications Universal plastic. However, its use temperature is not high, up to about 80 °C, hindering its development.
The resin is a chlorinated modified polyvinyl chloride (PVC ) resin and is a new type of engineering plastic. This product is white or light yellow, odorless, odorless, non-toxic loose particles or powder. After the PVC resin is chlorinated, the irregularity of the molecular bond is increased, the polarity is increased, the solubility of the resin is increased, and the chemical stability is increased, thereby improving the heat resistance of the material , acid , alkali , salt , oxidant , etc . Corrosion Improve the mechanical properties of the value of the heat distortion temperature , the chlorine content increased from 56.7% to 63-69%, Vicat softening temperature from 72-82 °C, (to 90-125 °C ), the maximum use temperature up to 110 °C, Long-term use temperature is 95 °C. Which CORZAN CPVC performance indicators are even better. Therefore, CPVC is a new type of engineering plastic with broad application prospects.
The polyvinyl chloride resin is used as a carrier, which has excellent characteristics such as accurate temperature sensing, melting at the time of order, rapid absorption of active ingredients of additives, etc. while weakening the attraction between the molecular chains of the resin. At the same time, it uses the world-famous calcium-zinc compound heat-binding agent. In the process of high temperature and melting of the resin, it can capture, inhibit, absorb and neutralize the removal of hydrogen chloride, double bond addition reaction to the polyene structure, replace the active and unstable chlorine atoms in the molecule. In order to effectively control the resin in the molten state of catalytic degradation and oxidative decomposition.