The vast majority of cling films and commonly used plastic bags sold on the market are made from ethylene masterbatch. According to the different types of ethylene masterbatch, cling films can be divided into three categories. The first type is polyethylene, abbreviated as PE. This material is mainly used for food packaging. We usually use this film for fruits and vegetables we buy back, including semi-finished products purchased in supermarkets; The second type is polyvinyl chloride, abbreviated as PVC. This material can also be used for food packaging, but it has a certain impact on human safety; The third type is polyvinylidene chloride, abbreviated as PVDC, mainly used for packaging of some cooked food, ham and other products. From a physical perspective, cling films have moderate oxygen and humidity permeability, regulating the oxygen and moisture content around the preserved product, blocking dust, and thus extending the shelf life of the food. Therefore, it is necessary to choose different cling films for different foods. There are generally two types of plastic wrap on the market: one is ordinary plastic wrap, which is suitable for refrigerator preservation; One type is microwave preservation film, which can be used for both refrigerator preservation and microwave oven preservation. The latter type of plastic wrap is far superior to ordinary plastic wrap in terms of heat resistance, non-toxicity, and other aspects. Therefore, consumers should pay special attention to their usage choices and use them separately.
characteristic
1. Easy to be pulled out and cut open;
2. Easy to adhere to glass ceramic and stainless steel tableware (but not the cling film itself);
3. Near transparency without wrinkles and uneven thickness;
4. Can withstand general pulling pressure.
purpose
1. Cover food utensils to prevent bacterial infection.
2. Refrigerate the soup bowl covered with cling film to remove any oil from the soup.
