When buying a fresh-keeping box or cling film, you must pay attention to whether it is marked with a specific name or chemical structure. If there is only an English name but no Chinese label, you should be cautious when buying products. At the same time, be sure to choose products marked "for food".

Fresh-keeping boxes are mainly made of polyethylene (PE) and polypropylene (PP). The price difference between the two products is not big, but polypropylene (PP) can better prevent the penetration of grease.

When buying cling film, it is recommended to buy a self-adhesive cling film made of polyethylene (PE), especially when it is used to keep meat, fruits, etc., Dongguan wire film wholesale, because in terms of safety, PE cling film It is the safest. If you want a longer shelf life, it is recommended to choose polyvinylidene chloride (PVDC), because the plastic wrap of this material has better moisture retention, and the shelf life of the three materials is the longest. Polyvinyl chloride (PVC) cling film has good transparency, good viscosity, good elasticity, and relatively low price, so it has become the choice of many people, but it must be noted that it cannot be used for preservation of oily food, because it is made of polyvinyl chloride. The resin composed of vinyl chloride resin, plasticizer and antioxidant is non-toxic. However, the main auxiliary materials such as plasticizers and antioxidants are toxic. The plasticizers in daily PVC plastics mainly use dibutyl terephthalate and dioctyl phthalate. These chemicals All are toxic, and the oil in food can easily dissolve the plasticizer "ethyl ammonia" in the cling film, which has a great damaging effect on the human endocrine system and disrupts the body's hormone metabolism. There is also lead stearate, the antioxidant of polyvinyl chloride, which is also toxic.

Lead-containing polyvinyl chloride (PVC) products containing lead salt antioxidants will precipitate lead in contact with ethanol, ether and other solvents. Lead-containing PVC is used for food packaging and encounters with fried dough sticks, fried cakes, fried fish, cooked meat products, cakes and snacks, which will cause lead molecules to diffuse into the grease, so PVC plastic bags cannot be used Contain oily foods. In addition, it must not be heated in a microwave oven or used at high temperatures. Because polyvinyl chloride plastic products will slowly decompose hydrogen chloride gas at a higher temperature, such as about 50 ℃, this gas is harmful to the human body, so polyvinyl chloride products are not suitable for food packaging.

At present, some beauty salons use PVC cling film to tightly wrap the body to burn fat and lose weight. This is actually a very dangerous behavior, because the large amount of plasticizers contained in PVC can easily enter the human body through the skin, and even affect the body's endocrine. Therefore, consumers must reject this way of losing weight.

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