Food packaging bags can help extend the shelf life of food, and the shelf life effects achieved for some different materials are different. Aluminum foil bags are common in food packaging, and their use must meet certain sealing requirements. This also ensures the sealing of the aluminum foil bag. The common and stricter sealing method is the heat sealing method.
The heat sealing method is a method of fusing two layers of aluminum foil together. This type of fusing is to combine two layers of aluminum foil into one layer without cracking or breaking, and there is no problem of leakage, thus achieving Sealing requirements.
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Aluminum foil packaging bags have many specifications, not only different sizes, but also different thicknesses, which also makes it meet a standard of packaging requirements. For different product packaging, the thickness of the packaging bag used is determined by the packaging nature of the product. For products with strict vacuum requirements, the thickness of the material used is larger. The greater the thickness of the aluminum foil packaging bag, the tighter the packaging performance and the more it can meet the packaging requirements. Only the packaging cost will be higher, because the packaging material cost is calculated based on quality.
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Food packaging bags are not just made of aluminum foil, but made of composite materials. This composite material is made of aluminum foil and nylon. Some are made of four-layer coextruded film. When it comes to food, it is often a multilayer composite material.
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The reason for using multi-layer composite materials is to package food and maintain the quality of the food. The other is that rich colors and patterns can be printed on the food packaging bag, which is also a way for food to be recognized by the market. It is also a food The necessary means of publicity.
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Composite packaging bags (films) are to meet the needs of different products. Therefore, two or more films or materials with different properties must be combined to complement each other to meet the packaging requirements.
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