Precautions for purchasing food cling film

Nowadays, food preservation film and food preservation bags have become indispensable items in people's lives. It is understood that there are currently three types of cling 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 cling film, which has the advantages of moisture resistance and good air permeability, but the disadvantage is that the gas barrier is poor, and it is not suitable for packaging oily food. PVC cling film can only be used to package vegetables and fruit foods. It cannot directly package meat, cooked food and oily foods, and it cannot be directly heated. PVDC cling film can be used to package cooked food and other foods that require high gas and oxygen barrier, but the cost is high and it is rare in the retail market. I hereby remind consumers to pay attention to the following points in the purchase process: First, pay attention to the materials labeled on the product: polyethylene film is now widely used in food packaging; polypropylene film has high transparency and is mainly used for bread and snacks. Such as packaging; vinyl chloride film can also be used for the packaging of corrosive foods such as vegetables and fruits, but it cannot be used for the packaging of oily foods, nor can it be used for heating in microwave ovens. Second, when heating food in a microwave oven, use a packaging container with a 'microwave oven special'. The refrigerated and frozen food in the refrigerator should use plastic wrap instead of ordinary plastic bags. Third, when using plastic bags to pack cooked foods, snacks, and other foods for direct consumption, it is best not to use colored plastic bags. Because most of these plastic bags are reprocessed from recycled waste plastic, they cannot be directly filled with food. Cling film can not be used on any product to keep it fresh. When using a certain kind of cling film for packaging, customers and friends should first understand the label of the cling film and see what ingredients it contains, and then according to the characteristics of the product Pack it. Many plastic wraps are marked with warnings such as 'Do not touch oily foodsThis kind of cling film packaging meat Guanlan heat-shrinkable bag, Pinghu heat-shrinkable film POF shrink film, PVC shrink film, PET shrink film, and shrinkage rate. Skinny packaging film: What is a heat shrinkable film?