Polypropylene is propylene by addition polymerization of polymers. White waxy materials, transparent appearance and light. Chemical formula (C3H6) n, density is 0.89 ~ 0.91 g/cm3, flammable, melting point 189 ℃, 155 ℃ or so to soften, using temperature range is - 30 ~ 140 ℃. Under 80 ℃ to acid, alkali, salt solution and many kinds of organic solvent corrosion, can decompose under high temperature and oxidation. Polypropylene is widely used in clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, pipeline, chemical containers, such as production, also used in food, pharmaceutical packaging.
