Food packaging sealing methods and thickness

Food packaging bags can help extend the shelf life, and for some of the different material quality of effect is not the same. Common in the food packaging is aluminum foil bag, its use can must meet the sealing requirements, which is to ensure that the aluminum foil bag sealing degree. The comparison of common strict sealing method, is the heat sealing method. Heat sealing method is two layers of aluminum foil fusion method in has been, this kind of fusion is to make the two layers of aluminum foil to a layer, won't produce the problem such as cracking or breakage, at the same time, there will be no more leakage problems, so as to realize the requirement of the seal. Aluminum foil bags have many specifications, not only the size is different, its thickness is not the same, it also makes it meet the packaging requirements of a standard. The packing bag of different product packaging, the thickness is determined by the nature of the packaging product, strict for vacuum products, its used material thickness is bigger. For the greater the thickness of aluminum foil packaging, packaging performance more closely, more can meet the requirements of the packing. It's just the cost will be higher, because of the packing material cost is calculated by the quality. Food packaging is not just a simple to use aluminum foil to made, but made of composite materials, the composite material composed of aluminium foil and nylon composite, have a plenty of, made of four layers co-extrusion film in some food packaging, often is multilayer composite materials. Adopt the cause of the multilayer composite material for packing food, maintain the quality of the food, another is can be printed on the packing bag of food rich in colour and design, it also makes a way of food recognised by the market, is also a necessary way of food advertising. Composite bags ( Film) Is in order to meet the requirements of different products, thus performance must take two or more different film or material together, complement each other, each other to meet the requirements of the packaging.
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