How do food packaging bags ensure food safety

First, the packaging film should comply with the national standards and cannot be replaced by inferior ones. Food enterprises should first find out what materials they need for their food packaging bags; The second is to find formal packaging enterprises for customized processing. Due to the lack of professional knowledge of packaging materials and the simple pursuit of low prices, some food enterprise personnel have been fooled from time to time. Take composite bags as an example. Many foods are used for vacuum packaging. The materials of such bags should have at least one layer of nylon packaging. However, some composite bags on the market cut corners and use polyester plastics (PET) instead of nylon materials, because nylon materials are twice as expensive as PET. The result is that the bag is fragile and not soft, and the puncture resistance is weak, resulting in air leakage and bag breakage in the food package, which outweighs the loss. The economic loss and negative impact are far higher than the cost saved by purchasing the bag at a low price. For example, the seven-layer co-extrusion packaging bag of new packaging materials should have at least two layers of nylon, but some use one layer, and the nylon content is low, and some also use smuggled garbage, which has more problems. This kind of bag has poor barrier, is easy to break, and is not resistant to high and low temperatures. At present, there are also cases in the market where aluminized bags are used as aluminum foil bags to sell to food enterprises, which also need to be identified in time to prevent being cheated.

Second, food packaging bags should meet the requirements of food safety and quality. 1. Food enterprises shall require packaging bag manufacturers to use packaging films that meet national standards. For example, the materials of composite bags should be green and environment-friendly, and dry composite plastic packaging containing benzene and other harmful substances should not be used, because its solvent is easy to penetrate and pollute the food. 2. Food packaging bags should be flat. No scratches, scalds, bubbles and wrinkles, no false seal. Flatness is not only a requirement for beauty, but also related to the quality of food. If the bag seal is not flat, the food package used for high temperature cooking or low temperature freezing will easily crack. 3. Green environmental protection materials shall be used for printing. The QS standard requires that no benzene solvent harmful to human health should be detected in food packaging. However, because the price of benzene solvent is about 30% lower than that of environment-friendly benzene and ketone-free solvent, and the brightness and color fastness are better, many packaging bags are also printed with such materials, which often pollute the food. 4. The production environment of the packaging enterprises making food bags should meet the standard to avoid polluting the food bags during the bag making process.

The third is to tailor food packaging for food enterprises. Packaging bag manufacturers should select appropriate packaging materials and processing technology according to the product packaging needs of food enterprises to avoid unnecessary costs for customers. Take the grain packaging bag as an example, many grain production enterprises now require the use of beautiful and good freshness vacuum plastic packaging. Some enterprises choose composite bags and think the cost is low. However, in fact, the cost of bags made of multi-layer co-extrusion materials with quality performance suitable for grain packaging is the same as that of composite bags. Because the thickness of the composite material should reach 100 microns, and the thickness of the multi-layer co-extrusion material should reach 90 microns, its puncture resistance, softness and freshness should meet the quality requirements. Moreover, because the material uses the hot-melt process and does not use adhesives, the food safety is guaranteed.