Sell Polypropylene Granule

Description

PP is a semi-crystalline materials, it is to be more rigid than PE and has a higher melting point.As the polymer type of PP are higher than the temperature above 0C very brittle, and manycommercial PP materials is to add 1 to 4% ethylene random copolymer or a higher ratio ofethylene content copolymer. PP copolymer-based material has a lower heat distortion temperature (**0 ℃), low transparency, low gloss, low rigidity, but a stronger impact strength, PP, the impact strength increases with increasing ethylene content . Vicat softening temperature of PP is **0C. As a high degree of crystallinity, the surface of the materialproperties of stiffness and good resistance to scratches. PP non-existent environmental stress cracking problems. Typically, the use of glass fiber, metal additives or thermoplastic rubbermodified PP method. MFR PP turnover ranges from 1 to *0. Low MFR of the PP materialimpact characteristics of a good extension, but lower strength. MFR for the same material, the strength of copolymer-based polymer type than are higher. As the crystal, PP contraction rate is very high, typically 1.8 to 2.5%. And uniformity of shrinkage in the direction other than PE-HDmaterial is much better. With *0% glass additive allows shrinkage to 0.7%. Both polymer typeand the type of PP copolymer materials have excellent resistance to moisture absorption,resistance to acid corrosion, anti-solubility. However, it aromatic hydrocarbons (eg benzene)solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents such as no resistance. PPdid not like PE still has a high temperature oxidation resistance.