Anti-mildew food packaging bags

At present, polyethylene and other plastic bags are generally used for small packages such as cakes, solid beverages, and meat, aquatic products, and processed products. Since these foods contain water, it is very easy to propagate bacteria and microorganisms during transportation and storage, thereby making the foods moldy and degenerate. In order to effectively solve this problem, Japanese researchers have invented a kind of food packaging bag that can prevent mildew. Using this kind of food packaging bag to pack food can make food not moldy for a long time. This mildew-proof food packaging bag is made of a polyolefin resin and contains 0.01% to 0.05% vanillin or ethyl vanillin.
 Polyolefin-based resins include many types, such as low-density polyethylene, high-density polyethylene, polypropylene, mixtures of ethylene and propylene, and mixtures of ethylene and vinyl acetate.
They may be a mixture of two components, or may be a mixture of two or more components. The film made of such a polyolefin-based resin can slowly vaporize vanillin or ethyl vanillin, and vanillin not only has the effect of preventing the occurrence of mildew in the food, but also has the aromaticity and can make the food more Suitable for people's tastes.
According to the results of the test, the content of vanillin or ethyl vanillin in the polyolefin resin is at least 0.01%, preferably about 0.05%. If the content is low, the mildewproof performance is poor; if the content is too high, the formation of the thin film will be affected.
There are many ways to mix vanillin or ethyl vanillin with polyolefin resins. The resin and vanillin can be made into solid powder and then directly mixed to make a high-concentration compound. Then, during the manufacture of the film, a polyolefin resin is added to dilute the high-concentration compound to produce a vanillin-containing polyolefin. Resin film. The tantalum film can be made into a single layer or multi-layered film, and can be directly made into a food packaging bag or a composite layer food packaging bag. When a multilayer film is used for bag making, it is preferable to use vanillin-containing polyolefin resin film as the inner layer of the packaging bag, and the outer layer is covered with a resin film that can prevent diffusion of vanillin to form a difficult-to-diffuse layer. Vanillin is diffused into the food in the bag to prolong the diffusion time and enhance the anti-mold effect. (Xue Yunlian)