China Auto plastic Parts is a semi-crystalline material, which is more hard than PE and has a higher melting point, which has the advantages of stronger impact strength, but we often encounter prices in price when purchasing products. However, but the factors affecting the price of PP plastic boards still depends on its own material and quality, so we still have to consider these problems when buying products.
Due to the high crystallinity, the surface stiffness and scratch characteristics of this material are very good, and there is no environmental stress cracking problem in PP. Typically, the product is modified using a glass fiber, a metal additive or a thermoplastic rubber, and the flow rate of PP is in the range of 1 to 40, the PP material of the low MFR is better, but the extension intensity is low.
For materials of the same MFR, the intensity of the copolymer type is higher than the homogeneous type, since the shrinkage of PP is quite high due to crystallization, and generally 1.8 ~ 2.5%. And the directional uniformity of the shrinkage ratio is much better than the materials such as PE-HD. A 30% glass additive was added to reduce the shrinkage ratio to 0.7%. Both homopolymer type and copolymer type PP materials have excellent anti-moisture, anti-acid alkali corrosion, anti-solubility.