Polypropylene (PP) plate, (PP pure plate, modified PP board, enhanced PP board, PP electrode)
Pure PP board: small density, easy welding and processing, with excellent resistance, heat resistance and impact resistance, non-toxic, tasteless is the most environmentally friendly one of the engineering plastics. The main colors are white, microcomputer color, other colors can also be customized according to customer requirements.
Modified PP board (calcium plastic plate): size is stable, low price, rigidity, heat resistance, etc. are more than pure PP have improved. Color is generally green, white, beige
PP board is a semi-crystalline material. It is harder than PE and has a higher melting point. Since the homopolymer PP temperature is higher than 0 ° C is very brittle, so many commercial PP material is added 1 ~ 4% ethylene random copolymer or higher ratio of ethylene content of the claw-type copolymer. Copolymer PP material has a low thermal distortion temperature (100 ° C), low transparency, low gloss, low rigidity, but has a stronger impact strength. The strength of PP increases with the increase of ethylene content.
PP Vicat softening temperature of 150 ℃. Due to the high degree of crystallinity, the surface stiffness and scratch resistance of this material is very good. PP does not exist environmental stress cracking problem. In general, PP is modified by the addition of glass fibers, metal additives or thermoplastic rubbers. PP flow rate MFR range of 1 to 40. Low MFR PP material has better impact resistance but lower ductility. For the same MFR material, the copolymer type has a higher strength than the homopolymer type. As a result of crystallization, PP shrinkage is quite high, generally 1.8 to 2.5%. And the direction of the uniformity of shrinkage than PE-HD and other materials much better. Adding 30% of the glass additive reduced the shrinkage to 0.7%. Both homopolymer and copolymer PP materials have excellent resistance to moisture absorption, acid and alkali corrosion resistance, anti-solubility. However, it has no resistance to aromatic hydrocarbons (such as benzene) solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents and the like.
Applications: Acid and alkali equipment, environmental protection equipment, waste water, waste exhaust equipment, scrubbers, clean rooms, semiconductor plants and related industrial equipment, but also the preferred material for the manufacture of plastic water tanks, PP thick plate widely used for stamping Plate, punch and so on.