If PVC preservative film wrapped in the cooked food contact the oil on the surface of cooked food surface or it is put into the microwave oven for heating, the plasticiser in preservative film will have a chemical reaction with the food, and the volatilized toxins will penetrate into the food or reside on the surface of the food and, therefore, do harm to human health. Experts warn consumers that they should carefully select film products for food. In selecting preservative film, for the sake of safety, you should see if there is no product description, if it is marked with PE or polyethylene preservative film, you can use it; if it is marked with PVC or does not specify the material, then do not buy. You'd better reduce usage of preservative film and packaging bags with PVC, that is, polyvinyl chloride as the raw material. Businessmen have to pay more attention to this problem. If it is for heating in the microwave oven, even if it the raw material is not PVC, it can be used only if it is marked with the "suitable for microwave oven" on the outer package.
Experts told the reporters that the plasticizer allowed to add in other countries will remain stable in room temperature, but DEHA which is banned by the countries can release at room temperature from the preservative film and penetrate into the food, especially in the packaging of food with higher fat content. At present, according to the material, food preservation film is divided into polyethylene, also known as PE preservative film, polyvinyl chloride, also known as PVC preservative film, polyvinylidene chloride, also known as PVDC preservative film. Among them, PVC and PE preservative film are used most commonly. PE preservative film is mainly sold in all kinds of supermarkets, and PVC preservative filmi is mainly used as food packaging in fresh and bulk food area in the supermarket, in addition to purchase by various hotels and restaurants and other group customers. In all kinds of preservative film, PVC due to the cheap price has the largest market share, about 60% to 70%.
PE film is a substitute for PVC preservative film which is non-toxic. Carcinogenic PVC preservative film: most of preservative films in the market in China which is made of PVC, and the prevalent saying that preservative film is toxic means there is a possibility that some of the harmful materials cause cancer when released. so, is PVC preservative film really toxic? It is said that once the PVC preservative film contacts the oil in cooked food, the harmful matter will be easy to be released. It will affect people's internal secretion, even cause breast cancer, birth defects of new-born babies or fertility problem of men. Europe and the United States, Japan and South Korea prohibited the use of PVC preservative film PVC at least 5 years ago, but the eliminated technology was introduced to China. There are joint ventures and exclusively foreign-owned enterprises produce using the technology, of which three major brands are LG, Mitsubishi and Sanrong whose output accounted for 70% of the entire market. Domestic preservative film companies started late, so the technology is relatively new, and they all use PE to replace PVC, but the market share of only 30%. : To identify whether the preservative film is toxic, the method is very simple. Light the preservative film with a lighter, if it drop like wax after burning and emit a smell of candles, then that is non-toxic polyethylene film. PVC has an unpleasant pungent smell.
How to identify poisonous preservative film? You can watch, touch, and burn on the fire to identify. 1 If it is labeled with the words "PE" in product description of the outer packaging of preservative film, or it is clearly marked that the material is polyethylene, then it can be used; if it is the written that the material is pvc or there is no label, do not buy. 2 Fetch a roll of PE preservative film, rub with your hands, it has bad viscidity, and is very easy to open; and PVC preservative film has good viscidity, and it gives off no smeel when rubbing.
