The pp material is Polypropylene. Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a density of only 0.90--"0.91g/cm3, which is one of the lightest varieties of all plastics at present. It is particularly stable to water, the water absorption rate in water is only 0.01%, and the molecular weight is about 80,000 to 150,000. It has good moldability, but due to the large shrinkage rate (1%~2.5%). Thick-walled products are easy to sink, For some parts with high dimensional accuracy, it is difficult to meet the requirements, and the surface of the product has good gloss.
Polypropylene is non-toxic and tasteless, has low density, strength, rigidity, hardness and heat resistance better than low-pressure polyethylene, and can be used at about 100 degrees Celsius. Has good electrical properties and high-frequency insulation is not affected by humidity. Common grades are homopolymerization, copolymerization and CPP film. Homopolymer is abbreviated as PPH, which is a polymer of single propylene monomer. It has a wide range of applications in the field of thermoplastics, especially in fiber and filament, film extrusion, injection molding and so on. Copolymerization is a copolymer of propylene monomer and ethylene monomer. According to the distribution of ethylene monomer on the molecular chain, copolymerized PP can be divided into two types: random copolymer (PPR) and block copolymer (PPB). Cast film is a kind of non-stretched, non-oriented flat extrusion film produced by solution salivation and quenching. It does not go through the two processes of longitudinal stretching and transverse stretching in BOPP, and directly salivates into the product width.
Except PP Resin,we can also supply PVC Resin, Pet Resin, Dioctyl Phthalate DOP 99.5%, Carbon Black Pigment, Titanium Dioxide Rutile,Optical Brightener OB1,Iron Oxide Pigments etc.