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Today, food wrap and food storage bags are essential items in people's lives. It is understood that there are 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-finished products purchased in the supermarket are packaged with PE plastic wrap. The advantages are moisture resistance and good air permeability. The disadvantage is that the gas barrier property is poor, and it is not suitable to package 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 retail market.
Here, Jiuzhi Plastics Network reminds consumers that the following points should be noted during the purchase process:
First, pay attention to the materials marked by the product: 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 corrosive foods such as vegetables and fruits. Packaging, but not for the packaging of greasy foods, nor for heating in microwave ovens.
Second, when heating food in a microwave oven, it is necessary to use a 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. Because most of these plastic bags are reprocessed from recycled waste plastics, they cannot be directly loaded with food.
Cling film is not used in any product to keep fresh, so when you use a plastic wrap to package, you should first understand the cling film, see what ingredients are included, and then according to the characteristics of the product. package. Many plastic wraps are marked with warnings such as “Cannot be in contact with greased foodâ€, “Do not use microwave ovenâ€, “Do not use high temperatureâ€, etc. This plastic wrap should be PVC PVC cling film. Pack the meat with this cling film.