The main uses of polypropylene: PP is also widely used, such as packaging, toys, washbasins, buckets, clothes hangers, cups, bottles, etc. Automobile bumper and other engineering applications. Polypropylene spun into silk is called polypropylene fiber, which is very common in textiles, non-woven fabrics, ropes, fishing nets and other products.
Polypropylene is widely used in the production of clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, transportation pipelines, chemical containers and so on. It is also used for the packaging of food and medicine.
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The toy number "7" stands for polycarbonate (PC) or other plastic products. PC is a widely used material, which is mostly used to make bottles, space cups and so on. Relatively safe. Plastic products made of PC are also controversial because of bisphenol A; The higher the temperature, the more bisphenol A is released and the faster it is. So when using, try not to heat plastic products or directly expose them to the sun.
Due to people's special needs for the appearance, color and function of plastic products, many new additives have been added in the production of plastics. For example, in order to look good in color, metal substances such as lead are added to plastic products.
In order to increase the expected toughness, plasticizers such as formamide and phthalate esters are added to the plastic. However, all kinds of additives in plastics do not polymerize with plastics, and will be released from plastics when plastics are heated or plastic products are aging, which may cause potential harm to health.
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