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        2. Introduction Of Plastic Wrap

          Jun 12, 2024 Leave a message

          Classification
          Most of the cling films and commonly used plastic bags sold on the market are made of ethylene masterbatch as raw materials. According to the different types of ethylene masterbatch, cling films can be divided into three categories.
          The first is polyethylene, referred to as PE. This material is mainly used for food packaging. The film used for fruits and vegetables we usually buy, including semi-finished products purchased in supermarkets, are all made of this material;
          The second is polyvinyl chloride, referred to as PVC. This material can also be used for food packaging, but it has a certain impact on human safety;
          The third is polyvinylidene chloride, referred to as PVDC, which is mainly used for packaging of some cooked food, ham and other products.
          Of these three types of cling films, PE and PVDC cling films are safe for the human body and can be used with confidence, while PVC cling films contain carcinogens and are more harmful to the human body. Therefore, when purchasing cling films, PE cling films should be used.
          From a physical point of view, cling films have moderate oxygen permeability and moisture permeability, which regulates the oxygen and moisture content around the preserved products, blocks dust, and thus prolongs the shelf life of food. Therefore, it is necessary to use different cling films for different foods.
          The cling film on the market can be roughly divided into two categories: one is ordinary cling film, which is suitable for refrigerator preservation; the other is microwave cling film, which can be used for refrigerator preservation and microwave oven preservation. The latter cling film is far superior to ordinary cling film in terms of heat resistance and non-toxicity. Therefore, consumers should pay special attention to the selection of cling film and use it separately.
          Features
          The ideal cling film should meet the following conditions:
          1. Easy to be pulled out and cut;
          2. Easy to adhere to glass ceramics and stainless steel pasta utensils (but not the cling film itself);
          3. Nearly transparent and without wrinkles, uneven thickness, etc.;
          4. Able to withstand general pulling pressure.
          Uses
          1. Cover food containers to prevent bacterial infection.
          2. Wrap food for easy storage (for example: sandwiches).
          3. Refrigerate soup bowls covered with cling film to remove oil from the soup.

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