Food wrap and food storage bags have become essential items in people's lives. It is understood that there are currently three kinds of wrap film, one is polyethylene (PE), the other is polyvinyl chloride (PVC), and the other is polyvinylidene chloride (PVDC). Among them, most of the semi-waste products purchased in supermarkets are packaged with PE plastic wrap. The advantages are moisture resistance, good gas permeability, and the defects are poor gas barrier properties. It is not suitable for packaging oily foods. PVC cling film can only be used to package vegetables and fruit foods. It can not directly package meat, cooked food and fat food, and can not be directly heated. PVDC plastic wrap can be used to package foods such as cooked foods that have high resistance to gas and oxygen. However, the cost is high and it is rare in the wholesale market.
Here, we specifically remind the broad consumers to pay attention to the following points during the purchase process:
First, pay attention to the product labeling information: polyethylene film is now widely used in food packaging; polypropylene film is highly transparent, mainly used for packaging of bread, small food, etc.; vinyl chloride film can also be used for vegetables, fruits and other corrosive foods. Packaging, but not for the packaging of greasy foods, nor for heating in microwave ovens.
The second is to use a microwave oven to heat the food, you must use a special packaging container with a microwave oven. Refrigerated and frozen foods in the refrigerator should be covered with plastic wrap instead of ordinary plastic bags.
Third, when packaging foods such as cooked foods and snacks in plastic bags, it is best not to use colored plastic bags. Since most of these plastic bags are reprocessed from recycled waste plastics, food cannot be directly loaded.
The cling film is not used in any product to keep it fresh. When customers use a cling film to stop the packaging, they should first understand the cling film and see what ingredients are included, and then according to the characteristics of the product. Stop packaging. Many plastic wraps are marked with warnings that cannot be contacted with greased foods, should not be heated in a microwave oven, and should not be used at high temperatures. Such cling film should be PVC PVC cling film, which should be carefully selected by the public and should not be packaged with such wraps.
