4hw.com.cn: in our daily life, when we often go to the supermarket, we will find that some cooked foods and fruits have been cut in advance and packed with a layer of film. Therefore, many people mistakenly believe that the layer of film pasted is the fresh-keeping film. It is good to put it directly into the refrigerator when you go home. In fact, the real way is to tear up the film and store it. So is it really safe to use plastic wrap? Is preservative film toxic? Let's take a look at it with Xiaobian~
Is it safe to use plastic wrap?
In order to increase its adhesion, the film contains a plasticizer named ethylhexylamine. The plasticizer has a great destructive effect on the endocrine system of the human body and will disturb the hormone metabolism of the human body. Therefore, to store food, first remove the preservative film, especially hot food do not use preservative film.
At present, there are three main raw materials for the production of food preservative film, namely polyethylene (PE), polyvinyl chloride (PVC) and polydichloroethylene (PVDC). Most of the fresh-keeping films on the market are made of polyethylene, which is regarded as the safest because it does not add any plasticizer in the production process.
Hidden danger of safety in supermarket
However, it is also possible to use PVC for wrapping food in supermarkets. The results show that the film contains plasticizer named ethylhexylamine in order to increase its adhesion. The plasticizer has a great destructive effect on the endocrine system of human body and will disturb the hormone metabolism of human body. This chemical is very easy to penetrate into food, especially high-fat food, and the cooked food in the supermarket is mostly high-fat food. After a long time of wrapping, the oil in the food is easy to dissolve the harmful substances in the fresh-keeping film, which will affect human health after eating. South Korea and other governments have begun to ban the use of the film.
How to use preservative film correctly
Nutritionists remind consumers to take the following measures for the food with preservative film: tear off the preservative film after going home, wrap the food with food preservative bag, and then put it into the refrigerator. You can also put food in a glass or ceramic box with a lid. If it is a container without a lid, when covering the plastic wrap, try not to fill the food too full to prevent direct contact with the plastic wrap. If you are worried about pollution, you can cut off the surface that has been in contact with the film, so as to reduce the damage of harmful substances. It is best to use glass or ceramic fresh-keeping box, followed by plastic fresh-keeping box made of PP material, and finally fresh-keeping film.
Warm reminder: when the food is still hot, do not cover the plastic film, because it will increase the loss of vitamins in the food. It's best to wait for the vegetables to cool completely and then cover with plastic wrap.
Precautions for using microwave preservation film
1. When heating the oily food, keep the film away from the food and do not make them contact directly. Because when the food is heated, the food oil may reach a high temperature, causing the fresh-keeping film to break and stick on the food.
2. When heating food, it is necessary to cover the utensils with plastic wrap, and then prick several holes on the plastic wrap with toothpicks and other needles, so as to facilitate the evaporation of water and prevent the bursting of plastic wrap due to gas expansion.
3. The maximum heat-resistant temperature of all brands of fresh-keeping film is different, some of them are about 10 ℃, and the temperature in the microwave oven is generally about 110 ℃, when it needs to be heated for a long time, pay attention to choose fresh-keeping film with high heat resistance.