PP plastic raw materials, chemical name: Polypropylene, commonly known as pleated plastic; characteristics: density, strength, stiffness, hardness, heat resistance are superior to low pressure polyethylene, can be about 100 degrees. Has good electrical properties and high-frequency insulation from humidity, but the low temperature brittle not wear, easy to aging. Suitable for production of general machinery parts, corrosion-resistant parts and insulating parts. PP material has a lower heat distortion temperature (100C), low transparency, low gloss, low rigidity, but have a stronger impact strength. Is a non-side chain and high crystallinity linear polymer, with excellent overall performance, it is the proportion of small, flex, rigid, high intensity, almost non-absorbent, good fluidity. (1) Physical properties: Polypropylene is non-toxic, odorless, tasteless white high crystallinity of the polymer, the density is only 0.90 ~ .091g/cm3, is the lightest of all varieties of plastic. It is particularly stable in water for 24h only 0.01% water absorption, molecular weight of about 8 to 15 million. Good shape, but the shrinkage is large, thick-walled products easy to sag. Product surface gloss, easy coloring. (2) mechanical properties: high crystallinity polypropylene, regular structure, which has excellent mechanical properties, its strength and hardness, elastic than HDPE, but in the room and low temperatures, because of their molecular structure of regular high poor impact strength, the molecular weight increases, the impact strength is increased, but the molding processability is deteriorated. PP The most outstanding performance is resistance to bending fatigue resistance, such as the one with the PP injection hinges can withstand 7 × 107 times opening and closing of the folding bending without signs of damage, dry friction coefficient and nylon are similar, but in the oil lubrication, as nylon. (3) Thermal properties: PP has good heat resistance, melting at 164 ~ 170 ℃, products at temperatures above 100 ℃ can be sterilized, free from external forces, 150 ℃ not deformed. Embrittlement temperature of -35 ℃, below -35 ℃ embrittlement occurs, cold resistance than polyethylene. (4) Chemical stability: very good chemical stability of polypropylene, in addition to be concentrated sulfuric acid, concentrated nitric acid corrosion, the variety of other chemical reagents are relatively stable, but the low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons etc. PP can soften and swell, while its chemical stability increases with the degree of crystallinity which had been improved, so suitable for the production of various chemical polypropylene pipes and fittings, anti-corrosion effect is good. (5) Electrical properties: polypropylene high insulation performance, because it almost does not absorb water, so the insulation is unaffected by humidity. It has a higher dielectric constant, and with the rise in temperature, can be used to produce heating of electrical insulation products, and its breakdown voltage is high, suitable for electrical accessories. Anti-voltage arc resistance is good, but the static and high contact with copper easy to aging. PP polypropylene chemical stability is very good, in addition to be concentrated sulfuric acid, concentrated nitric acid erosion, the variety of other chemical reagents are relatively stable, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons can soften and PP swelling, while its chemical stability increases with the degree of crystallinity which had been improved, so suitable for the production of various chemical polypropylene pipes and fittings, anti-corrosion effect is good. PP polypropylene high insulation performance, because it almost does not absorb water, so the insulation is unaffected by humidity. It has a higher dielectric constant, and with the rise in temperature, can be used to produce heating of electrical insulation products, and its breakdown voltage is high, suitable for electrical accessories. Anti-voltage arc resistance is good, but the static and high contact with copper easy to aging. Modified glass fiber reinforced PP, generally, PP tensile strength between 20M ~ 30MPa, the bending strength between 25M ~ 50MPa, the bending modulus between 800M ~ 1500MPa. If you want to put PP structural parts used in construction, it must be reinforced with glass fiber. Long-term business of plastic raw materials, such as: Japan, Bao Li, Taiwan's Chi Mei, GE, DuPont, Bayer, Samsung, Hyosung, U.S. Ticona, Japan, UMG, Ube, Japan, Mitsubishi, Sumitomo, Nippon Ink , Toray Plastics and other companies have produced. 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