According to reports, the plastic polyethylene, polypropylene, polyester, polystyrene, etc. currently used for packaging foods are qualified for hygienic performance and are safe for food packaging. However, consumers cannot distinguish between food and non-food plastic bags, so a considerable number of unqualified plastic bags are used for food packaging, which seriously endangers people's health.

Experts advise that when packaging foods such as cooked foods and snacks in plastic bags, it is best not to use colored plastic bags. Because the pigment used for dyeing plastic bags has strong permeability and volatility, it easily oozes when exposed to oil and heat. The hypothesis is an organic dye, which also contains aromatic hydrocarbons, which have a certain impact on health. In addition, many colored plastic bags are made of recycled plastic. Because of the high amount of impurities in recycled plastics, manufacturers have to add pigments to cover them. However, some plastic bags made from recycled plastic are also white.

Experts also pointed out that there is currently no very effective way to distinguish plastic food bags, but one thing is certain, plastic bags produced by informal manufacturers and sold in street stalls should never be used for food packaging. In addition, plastic bags are assumed to have an odor and cannot be used to hold food.

Although plastic food bags are safe, they must be used in a way. Do not use high temperature foods in plastic bags for long periods of time. In daily life, people often see steamed fried cakes and fritters in plastic bags. If they are eaten in a short period of time, there is not much harm; but if you put the overheated food in the bag for a long time, it will make Some materials in plastics exude and affect health. To heat food in a microwave oven, it is best to use a plastic bag and a special container for the microwave oven. Refrigerated and frozen foods in the refrigerator should be replaced with ordinary plastic bags instead of ordinary plastic bags. The process and raw materials of cling film have good breathability and fresh-keeping properties, while ordinary plastic bags use a little longer, which will cause the food to deteriorate and rot, failing to maintain the purpose of preservation.