↘PC 5201-8 ▓Long term supply polypropylene is a kind of high rigid material, and belongs to polyolefin with PE. The homopolymer density is as low as 0.90. Glass fiber and minerals (such as calcium carbonate) can be added. PP is not suitable for use below 0oC. If it is to be used at subzero temperatures, butadiene must be copolymerized, thus resulting in copolymerization of PP. The operating temperature of homopolymerization PP is 90oC, and the chemical (acid and base) properties are very good. Parts produced with homopolymer PP have very low moisture absorption, but they shrink considerably during injection. The electrical properties are good, but they are resistant to ultraviolet light and have poor penetration resistance. Chemical modification of the commonly used method which is a kind of modified resin monomer is one yuan, modified monomer for another element, graft copolymerization in the reactor and obtain new copolymer; the second method is to be modified resin as the main raw material, through the modification of its effective to increase the polarity of the resin molecular elements. Polypropylene is widely used in the production of plastic pipes, but PP is a material with poor anti-aging properties. In order to improve the performance of PP, PP-B and PP-R resin are invented by chemical modification. PP-B resins are block copolymers of propylene and ethylene. The synthesis of propylene ethylene block copolymers requires two polymerization reactors PA66 is solvent resistant to many solvents, but less resistant to acids and other chlorinated agents. process conditions Drying treatment: if the material is sealed before processing, there is no need to dry. However, if the storage container is opened, it is recommended to be dried in hot air at 85 degrees centigrade. If humidity is greater than 0.2%, a vacuum drying of 105 DEG C?or?12 h is required. Melting temperature: 260~290 DEG C. The product of glass additive is 275~280 DEG C. The melting temperature shall be avoided above 300 degrees centigrade. Mold temperature: 80 c.. The mold temperature will affect the crystallinity, while the crystallinity will affect the physical properties of the product. For thin wall plastic parts, if the die temperature is below 40 degrees, the crystallinity of the plastic will change over time. In order to keep the geometrical stability of the plastic parts, annealing is necessary. Injection pressure: usually at 750~1250bar, depending on the material and product design. Injection speed: high speed (for reinforced material should be slightly lower). High impact resistance, excellent weatherability and Matt effect of high performance PC / / /ABS A2200 alloy material has, can be used in car audio systems, car dashboard and DVD etc.. PC / / /ABS A2200MP electroplating plating effect has outstanding and excellent low temperature performance, can be applied to car handle plating parts. Note: /PC, plastic molding process Causes and Solutions , 1 silver A, raw material moisture - drying materials B, thermal decomposition - reduction resin molding temperature C, screw compression ratio is small, insufficient pressure, increase the back pressure D, die temperature low - heating mould E, poor exhaust - mold parting surface vent ABS resin is one of the five major synthetic resin, impact resistance, heat resistance, low temperature resistance, chemical resistance and excellent electrical properties, but also has the characteristics of easy processing, product size stability, good surface gloss, easy coloring, painting, but also the surface plating metal, electroplating, welding, hot pressing and bonding the two processing, widely used in the industrial field of mechanical and automotive electrical and electronic instruments, textiles and construction, is a very widely used thermoplastic engineering plastics. The acrylonitrile butadiene styrene copolymer is a three yuan copolymer of acrylonitrile, butadiene and styrene. ABS, AX4200, ABS, AXT010, ABS, AXT040, ABS, AF3800, ABS, ABS, AXTO4O, ABS, AX4000, ABS, AX4100, ABS, AP22AT, AT5800, ABS, AT5500, ABS, ANC100