Polypropylene -PP，one kind of injection molding plastic material
Polypropylene -PP is widely used in the plastic injection molding industry in China, has good electrical properties and high-frequency insulation from humidity, but the low temperature brittle, not easy to aging. Suitable for the production of general machinery parts, corrosion-resistant parts, and insulation parts.
Polypropylene is a non-toxic, odorless, tasteless milky highly crystalline polymer, the density of only 0. 90 -. “0 91g / rm, is one of the lightest of all varieties of plastic it particularly stable water. the water absorption of only 0. O1%, in case of a molecular weight of about 8 150 000. moldability is good, but shrinkage rate (1% to 2.5%). walled products easy to sag, higher precision of the dimensions of some parts, but also difficult to meet the requirements, the product surface gloss, easy coloring.
Polypropylene -PP Main applications:
Polypropylene -PP is also a very broad range of use plastic molding, everyday items such as packaging, toys, basins, buckets, hangers, cups, bottles, etc.; engineering applications such as car bumpers. PP spun yarn is known as polypropylene, textiles, non-woven fabrics, ropes, nets, and other products are common.
PP and PE material processing methods and the use of similar, non-toxic. Possible threats from the processing and modification additives. Especially due to poor weather PP, used in the production of the anti-aging agent may contain heavy metals. Products compared to PE, PP products slightly better heat resistance, typical Lock & Lock glass using temperature can reach 110 ℃, but then there is a high-temperature melting softening and dangerous, and should be avoided.
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