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Odorless And Non-toxic. Heat And Corrosion Resistant
Apr 28, 2018

Polypropylene, a thermoplastic resin made from the polymerization of propylene. The positions of the methyl groups are classified into isotactic polypropylene, atactic polypropylene, and syndiotactic polypropylene.

The methyl groups are arranged on the same side of the molecular backbone as isotactic polypropylene. If the methyl groups are disorderly arranged on both sides of the molecular backbone, they are called random polypropylenes. When the methyl groups alternate between the two sides of the molecular backbone, Polypropylene. In general industrial polypropylene resins, the isotactic structure content is about 95%, and the rest is random or syndiotactic polypropylene. Industrial products are mainly composed of isotactic substances. Polypropylene also includes copolymers of propylene and small amounts of ethylene. Usually translucent colorless solid, odorless and non-toxic. Due to the highly structured structure, the melting point can be as high as 167°C. Heat resistance, corrosion resistance, steam sterilization products is its outstanding advantages. Low density is the lightest universal plastic. The disadvantages are poor low-temperature impact resistance and easier aging, but they can be overcome by modification.

Polypropylene is a non-toxic, odorless, odorless, milky, highly crystalline polymer with a density of only 0.90--"0.91g/cm3, which is one of the lightest species in all plastics. 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. The molding property is good, but the shrinkage rate is large (1% to 2.5%). The thick-walled products are easily sag and have high dimensional accuracy. Parts, it is difficult to meet the requirements, product surface gloss is good.

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