A homopolymer PP- polypropylene [size = -1] Homo-polymer polypropylene, abbreviated PP homopolymer Polypropylene PPH short PPH, is a single propylene monomer polymers. Polypropylene (PP) was produced in 1957, was the first one of stereoregular polymers. Its historical significance is that it has been the fastest growing major thermoplastics.Its national output in 2004 was to 300 million tons. It has a very wide range of applications in the field of thermoplastics, aspects, fibers and filaments, film extrusion, injection molding, etc. Especially in.
Second, PP copolymer, Polypropylene Copolymer, referred to as PPC, is a copolymer of propylene monomer and ethylene monomer; vinyl monomer according to a distributed manner on the molecular chain, the copolymerization can be divided into PP random copolymer (PPR) and fitted block copolymers (PPB) two kinds. PPH's rigidity, but with poor impact resistance, particularly with low temperature resistance,and also with poor creep resistance. PPB's good at impact resistance, but poor creep resistance is same as PPH. The impact resistance and creep resistance of PPR are all good.
Third, CPP film - polypropylene CPP is "Casting Polypropylene" for short, namely polypropylene film salivation. By melt salivation, quench the production of a non-stretch, non-oriented cast film. BOPP does not pass through it in two longitudinal stretching and transverse stretching process, directly into the product width salivation.