How food packaging bags ensure food safety
One is that the packaging film must comply with national standards and cannot be shoddy. Food companies must first figure out what materials they need for their food packaging bags.
Secondly, find regular packaging companies for customized processing.
Due to the lack of professional knowledge of packaging materials and the simple pursuit of low prices, some food company personnel are fooled from time to time. Take composite bags as an example. Many foods are used for vacuum packaging. The material of this type of packaging bag should have at least one layer of nylon packaging, but some composite packaging bags on the market cut corners and use polyester plastic (PET) instead of nylon material. , because nylon material is twice as expensive as PET. The result is that the bag is very brittle and not soft, and its puncture resistance is weak, causing food packaging to leak and break the bag. Another example is the seven-layer co-extrusion packaging bag of new packaging materials, which should have at least two layers of nylon, but some use one layer, and the nylon content is low, and some use smuggled garbage, which has more problems. This type of bag has poor barrier properties, is easy to break, and is not resistant to high and low temperatures. At present, there are still situations in the market where aluminized bags are used as aluminum foil bags to sell to food companies, and it is also necessary to identify them in time to prevent being deceived.
Second, food packaging bags must meet food safety and quality requirements.
1. Food companies should require packaging bag manufacturers to use packaging films that meet national standards. For example, the material of the composite bag should be green and environmentally friendly, and dry composite plastic packaging containing harmful substances such as benzene should not be used, because the solvent is easy to penetrate and pollute the food.
2. Food packaging bags should be flat. No scratches, burns, bubbles and creases, no false seals. Flatness is not only a requirement for aesthetics, but also related to the quality of food. If the seal of the bag is uneven, the food packaging used for high-temperature cooking or low-temperature freezing will easily crack.
3. Green environmental protection materials should be used for printing. The QS standard requires that benzene solvents that are harmful to human health should not be detected in food packaging, but because the price of benzene solvents is about 30% lower than that of environmentally friendly benzene-free and ketone-free solvents, and the vividness and color fastness are better, so many This type of material is also used in the printing of packaging bags, and the problem of food contamination often occurs.
4. The production environment of packaging enterprises that make food bags must meet the standards to avoid contamination of food bags during the bag making process.
The third is to tailor food packaging for food companies. Packaging bag manufacturers should choose appropriate packaging materials and processing technology according to the product packaging needs of food companies, so as to avoid unnecessary costs for customers. Take miscellaneous grain packaging bags as an example, many miscellaneous grain production enterprises now require the use of vacuum-pumped plastic packaging that is beautiful and fresh. Some companies choose composite bags, thinking that the cost is low. But in fact, the quality and performance of bags produced by multi-layer co-extrusion materials suitable for grain packaging, the cost is the same as that of composite bags. Because the thickness of the composite material reaches 100 microns, while the thickness of the multi-layer co-extrusion material reaches 90 microns, its puncture resistance, softness, and freshness can meet the quality requirements. Mixture, food safety is guaranteed.