Precautions for the use of the hottest personal da

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Precautions for personal daily use of plastic products

improper use of plastic products can also cause harm. It is reported that some plastic products have triangle signs, and the triangle is marked with numbers. Different numbers represent different materials and scope of use. Although this sign is mainly convenient for classification and recycling, it can also be used as a reference for safe use

the meaning of the numbers in the triangle sign

1: polyethylene terephthalate, which cannot contain high-temperature water and acid, has pushed the lithium battery industry as a key thermal insulation material to the forefront of the development of alkaline beverages

2: high density polyethylene, which is not easy to clean thoroughly, is not suitable for making water cups, etc

3: PVC has low heat-resistant temperature. If it is sintered twice during high-temperature decomposition, it may release harmful substances and is not suitable for packaged food

4: products made of polyethylene, such as fresh-keeping film and plastic film, are common. Harmful substances are produced at high temperature. After entering the human body with food, it may cause breast cancer, congenital defects of newborns and other diseases. The fresh-keeping film made of it is not allowed to enter the microwave oven

5: polypropylene, the only plastic box that can be put into the microwave oven

6: plastic products made of polystyrene cannot be used in high temperature, strong acid and strong alkali environment

7: acrylonitrile styrene resin has high safety, high transparency, fall resistance, but poor durability

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