What to pay attention to before purchasing food packaging bags
In our daily life, the quality of food packaging is very important to us. Substandard food packaging bags can cause serious harm to our body. So what should we know before purchasing food packaging bags ? Shanghai Leyi will introduce it to you below.
First, the packaging film must meet the national standards
Food companies must first figure out what materials they need for food packaging bags; second, they need to find regular packaging companies for custom processing. Because of the lack of professional knowledge of packaging materials and the pursuit of low prices, some food companies have been confused from time to time.
Take composite bags as an example. Many foods are used for vacuum packaging. The material of this type of packaging should have at least one layer of nylon. Because nylon is twice as expensive as PET. The result is that the bag is very brittle and not soft, and the puncture resistance is weak, which causes air leakage and bag breakage of the food packaging.
Another example is the seven-layer co-extrusion packaging bag of the new packaging material, which 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. Such bags have poor barrier properties, are easy to break, and are not resistant to high and low temperatures. At present, there are cases in which aluminum foil bags are used to sell food products to food companies in the market, and they need to be identified 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. Do not use dry composite plastic packaging containing benzene and other harmful substances, because the solvent easily penetrates and contaminates food.
2. The food packaging bag should be flat. No scratches, scalds, bubbles and wrinkles, no false seals. Flatness is not only an aesthetic requirement, but also about the quality of the food. If the bag seal is not flat, food packaging used for high-temperature cooking or low-temperature freezing will easily crack.
3. Use green materials for printing. The QS standard requires that food packaging must not detect benzene solvents that are harmful to human health, but because benzene solvents are about 30% cheaper than environmentally friendly benzene-free and ketone-free solvents, and they have good brightness and color fastness, so many This kind of material is also used in the printing of packaging bags, and the problem of contaminating food often occurs.
4. The production environment of packaging enterprises making food bags must meet the standards to avoid contamination of food bags during bag making.
3. Tailoring food packaging for food companies
Packaging bag manufacturers should choose appropriate packaging materials and processing techniques according to the food packaging needs of food companies to avoid food companies from increasing unnecessary costs. Taking the grain packaging bag as an example, many grain production enterprises now require the use of vacuum-proof plastic packaging with beautiful appearance and good freshness. Some companies have opted for composite bags and believe that the cost is low. But in fact, the quality performance is suitable for bags made of multi-layer co-extrusion materials for multi-grain packaging. The cost is the same as that of composite bags. Because the thickness of the composite material must reach 100 microns,
And because the material uses a hot-melt process, no adhesive is used, and food safety is guaranteed. Those packaging companies that really treat food companies as customers and have a certain level of themselves will certainly be able to do this.
Shanghai Leyi has customized food packaging bags for more than ten years. The company's production processes are strictly in accordance with international standards. The production site is controlled by 7S and the quality is strictly controlled. Enterprises and institutions in various regions of the country provide high-quality customized food packaging services, which are welcomed by domestic and foreign markets.
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