Polypropylene is a light milky, semitransparent polyolefin pellet. It is the only one species, which could withstand boiling water, in all of the general purpose plastic, and could be sterilized under 130℃. Polypropylene has excellent properties, including good dielectric strength, chemical stability, almost inabsorbability of water, with no effect on contacting with most of the chemicals. Polypropylene could be corroded on contacting with fuming sulfuric acid, fuming nitric acid, chromic acid solution, halogen, benzene, carbon tetrachloride, chloroform. Polypropylene is nontoxic plastic, could be applied in the manufacturing of food grade packaging materials and medical appliances. Compared with polyethylene, polypropylene has minor mold shrinkage and good stress cracking resistance.
The Polypropylene Plant, one of the derivative plants of the 900 KTPA Ethylene Cracker Complex owned by Shanghai SECCO Petrochemical Company Ltd., has a production capacity of 250 KTPA. This PP Plant employs the technology from BP, which has wide product applicability scope covering injection mounding forming, blow mounding, thermal forming, film, extrusion, sheet materials and fiber. In terms of the fiber resin, in particular, its cut fiber, continuous filament yarn, non-woven fabric and ripping film are featured by remarkable toughness and strength. SECCO introduced some grades, including hereinto homo-polymer, random copolymer and impact copolymer, etc.