1, PE and PVC cling films are the most common cling films on the market. These two kinds of cling films are not resistant to high temperature and are toxic after heating, which may be harmful to health. PVDC plastic wrap is a high temperature resistant plastic wrap, so its composition will not change after heating, and it is non-toxic.

2. When buying plastic wrap, you must go to a regular supermarket to buy PE (polyethylene) plastic wrap, and mark it with "QS", marked with the word PE (polyethylene), manufacturer and detailed address.