Food composite bags are the last process in the production of food companies. How the quality of food packaging bags is directly related to food quality and safety and consumer health. Since packaging bag production involves specialized processes such as material science, design, plate making, printing, and bag making, most food companies use food packaging bags produced by packaging companies. Since the reform and opening up, the development of my country's food packaging industry has achieved rapid progress, with a large number of new materials and new processes emerging, and food packaging is dazzling. However, the packaging industry also has safety issues that cannot be ignored in terms of raw materials, auxiliary materials and processes.

How do food composite bag manufacturers guarantee the safety and quality of food?

First, the packaging film must meet national standards and cannot be shoddy. Food companies must first find out what materials their food packaging bags need; secondly, they must find formal packaging companies for custom processing. Due to the lack of professional knowledge of packaging materials and the pure pursuit of low prices, some food companies have been confused from time to time. Taking 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. However, some composite packaging bags on the market cut corners and do not have nylon materials, but use polyester plastic (PET). , Because nylon material is twice as expensive as PET. The result is that the bag is very fragile and not soft, and the puncture resistance is weak, causing food packaging to leak and break the bag. The gain is not worth the loss, and the economic loss and negative impact are much higher than the cost saved by low-priced bags. For example, the seven-layer co-extrusion packaging bag of the new packaging material 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 causes 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 still cases in the market that use aluminum-plated bags as aluminum foil bags to promote sales to food companies, and they need to be identified in time to prevent being deceived.

The second is that 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 do not use dry composite plastic packaging that contains harmful substances such as benzene, because the solvent can easily penetrate and contaminate food.

2. Food packaging bags should be flat. No scratches, burns, bubbles and wrinkles, no voids. Flatness is not only an aesthetic requirement, but also related to the quality of the food. If the sealing of the bag is not flat, the 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-based solvents that are harmful to human health. However, because the price of benzene-based solvents is about 30% lower than that of environmentally friendly benzene-free and ketone-free solvents, and the brightness and color fastness are better, so many This type of material is also used in packaging bag printing, and the problem of food contamination often occurs.

4. The production environment of packaging companies that make food composite 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 techniques according to the packaging needs of food companies to avoid unnecessary costs for customers. Take the grain packaging bag as an example. Now many grain production companies require the use of vacuumized plastic packaging with good looks and good freshness. Some companies choose composite bags, thinking that the cost is low. But in fact, the quality and performance of bags made of multi-layer co-extruded materials suitable for packaging of miscellaneous grains have the same cost as composite ones. Because the thickness of the composite material reaches 100 microns, and the thickness of the multi-layer co-extruded material reaches 90 microns, its puncture resistance, softness, and freshness can meet the quality requirements, and because the material uses a hot melt process, it does not use sticky Mixture, food safety is guaranteed.