Plastic bag safety code: those plastic bags can hold food

Nowadays, plastic bags have replaced the previous dishes, and it has a wide range of applications, especially plastic bags for food packaging. Plastic bags are generally made of two types of plastic film: one is made of polyethylene, polypropylene and melamine; the other is made of polyvinyl chloride. The former is non-toxic; the latter is toxic and cannot be packaged.

The availability of plastic bags can be identified by the following simple methods:

The water bag is used to put the plastic bag into the water. When the non-toxic plastic bag is put into the water, it can float out of the water; while the toxic plastic bag does not float upward.

Hand touch detection method touches the plastic bag by hand, and it is non-toxic if it is lubricated; otherwise it is toxic.

The jitter detection method grasps one end of the plastic bag by hand and mixes it vigorously. The person who emits the crisp sound is non-toxic; otherwise, it is poisonous.

The fire detection method can cut the plastic bag to one side, burn with fire, toxic and not easy to burn; non-toxic fire easily

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