What material is pp?

PP is a kind of polypropylene material.

Polypropylene is a thermoplastic resin polymerized from propylene. According to the arrangement position of methyl groups, they can be divided into isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene.

When methyl groups are arranged on the same side of the molecular backbone, it is called isotactic polypropylene; If methyl groups are arranged on both sides of the molecular main chain in disorder, it is called random polypropylene; If methyl groups are alternately arranged on both sides of the molecular main chain, it is called syndiotactic polypropylene. In general industrial polypropylene resin, 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 a copolymer of propylene and a small amount of ethylene. Usually a translucent colorless solid, tasteless and nontoxic. Because of its regular structure and high crystallinity, its melting point can reach 167℃. Its outstanding advantages are heat resistance and corrosion resistance, and the product can be sterilized by steam. Low density, it is the lightest general plastic. The disadvantages are poor impact resistance at low temperature and easy aging, but they can be overcome by modification respectively.

Extended data

Application of polypropylene material

PP material has the characteristics of low density, good chemical resistance, low price and excellent comprehensive properties. After transformation, it is widely used in the field of household appliances.

PP material for preventing cockroaches and rats from biting.

PP material for preventing cockroaches and mice from biting can prevent cockroaches and mice from damaging electrical appliances by stimulating their taste and smell. Mainly used in induction cookers and other electrical appliances.

Dye-proof PP material

In order to reduce the cost, the liner material of household appliances such as dishwasher or juicer is mostly modified PP material. After repeated use, the liner is easy to get dirty. The reason is that the surface color of the liner material changes after direct contact with juice, food residue and food seasoning. When the color changes to a certain extent, it will become dirty, and even be used as a pollution source to pollute the next batch of food, reducing the quality of products.

Using anti-dye PP can solve these problems. Dye-resistant PP material has the characteristics of pollution-free, dye-resistant, high fluidity and balance of rigidity and toughness, and is mainly used for spray arms, filters and other parts of dishwashers.

Antibacterial PP material

After a period of use, household appliances breed a large number of pathogenic bacteria and molds, which pose a direct threat to consumers' health. Antibacterial PP materials can inhibit or kill bacteria, molds, alcohol bacteria, algae and even viruses that pollute plastics, and keep themselves clean by inhibiting the reproduction of microorganisms.

The antibacterial plastics used in giant fat household appliances have the characteristics of high strength, high toughness and inhibition of the growth of bacteria and molds. Mainly used in washing machines, air conditioners, air purifiers, water purifiers, refrigerators and other household appliances.

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