Fresh-keeping film and fresh-keeping bags are commonly used plastic packaging products for fresh food preservation. Nowadays, many families cannot live without them. Microwave food heating will be used, and storing food in the refrigerator will also be used. People seem to feel safe and reliable when using it. However, sometimes this plastic wrap and fresh-keeping bag itself is difficult to rest assured, not to mention the food it is wrapped in? Recently, the Shanghai Consumers' Association commissioned the inspection and quarantine department to carry out hygiene tests on edible film products sold on the Shanghai market and spot-checked edible film products in six large supermarkets and food stores. The test results showed that 52 kinds of film products of different brands did not meet the hygiene and safety standards, and there were serious problems such as excessive content of the leachables and decolorization. And these 52 kinds of unqualified edible film products are sold in supermarkets and food stores across the country. It is understood that the vast majority of plastic wraps currently sold on the market, like the commonly used plastic bags, are based on ethylene masterbatches. According to the different types of ethylene masterbatch, cling film is divided into three categories. Dong Jinshi (Deputy Director of the China Packaging Resources Comprehensive Utilization Committee): The first one is polyethylene, or PE for short. This material is mainly used for food packaging, such as the film we use to buy fruits and vegetables. The semi-finished products purchased by supermarkets use this kind of material; the second is polyvinyl chloride, or PVC for short. This material can also be used for food packaging, but it has a certain impact on the safety of the human body; The third category is polyvinylidene chloride, abbreviated as PVDC, which is mainly used for the packaging of some cooked food, ham and other products. Experts said that in the three plastic wraps, the plastic wrap of PE and PVDC is safe to the human body and can be used with confidence. The PVC cling film is harmful to the human body. Dong Jinshi (Deputy Director of the China Packaging Resources Comprehensive Utilization Committee): The main component of the plasticizer used for PVC cling film is ethylhexylamine, abbreviated as DEHA. After adding this substance, it is easy to precipitate. As food is brought into the human body, it causes carcinogenic effects on the human body, and in particular causes endocrine and hormonal disorders, thus causing greater harm to the human body. The PVC cling film wrapped in cooked food, if it is in contact with grease on the surface of the cooked food or heated in a microwave oven, the plasticizer in the cling film chemically reacts with the food, and the toxins volatilize, penetrate into the food, or remain in the food. On the surface, it affects and harms human health. Experts advise consumers that they should be careful when using food-related film products. Dong Jinshi (Deputy Director of China Packaging Resources Comprehensive Utilization Committee): When purchasing plastic wrap, for the sake of consumer safety, see if it has product descriptions. If you use PE plastic wrap or polyethylene wrap, you can rest assured. If you use PVC, or if you do not write material, then you should try not to buy it. It appears that the use of PVC, which is PVC as raw material for plastic wrap and packaging bags, is best used sparingly, as businesses pay more attention to this issue. If it is heated in a microwave oven, even if it is not using PVC as a raw material, it must be marked on the outer packaging with the words “microwave oven application†before it can be used. Nucleic Acid Extraction Reagent Kit 100T(manual) The product is suitable for the extraction, accumulation and purification of virus DNA & RNA. After washing and eluting the binded DNA & RNA on the magnetic beads, the protein and other impurities can be removed effectively. DNA extraction kit,DNA extraction reagent kit,RNA extraction kit,RNA extraction reagent,DNA extraction solution Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com
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