2.PE cling film can be heated directly in the microwave oven, but PVC cling film can't.
3. At present, there are mainly PE and pvc plastic wrap on the market. Boxed plastic wrap purchased and used by consumers in supermarkets generally has PE logo, which does not contain substances harmful to human health and can be used with confidence.
4.PVC cling film is mainly used in the fresh and cooked food department of supermarkets, mostly used in fresh fish packaging, cooked food packaging, fruit packaging and some bulk food packaging. Don't use this kind of packaging bag to heat food directly, and don't use microwave oven to heat it, because it will accelerate the release of carcinogens.
5. PE plastic wrap used at room temperature cannot be heated, and PE plastic wrap that can be heated should also be careful not to melt when heated, otherwise it may release toxic substances.
Extended data:
Scope of application of plastic wrap
The experiment showed that100g of leek wrapped with plastic wrap had more vitamin C than that without plastic wrap1.33mg, and rape and lettuce leaves had more1.92mg after 24h. But the experimental results of some vegetables are quite different. 100 grams of radish wrapped in plastic wrap stored for one day, its vitamin C content decreased by 3.4 mg, and beans decreased by 3.8 mg. After storing cucumber for one day and one night, the loss of vitamin C is equivalent to five apples.
Cooked food, hot food, oily food, especially meat, it is best not to wrap it with plastic wrap. Experts pointed out that after these foods come into contact with plastic wrap, it is easy to volatilize the chemical components contained in their materials and dissolve them into food, which is not conducive to health. The plastic wrap sold in the market, like ordinary plastic bags in Otawa, is made of ethylene masterbatch. Some plastic wrap materials are polyethylene (PE for short), which contains no plasticizer and is relatively safe to use; Some materials are polyvinyl chloride (PVC), and raw materials such as stabilizers, lubricants and auxiliary processing AIDS are often added, which is harmful to human body. Therefore, we must choose carefully.
Refer to Baidu Encyclopedia cling film.