You must guess the aluminum foil the principle and material selection of vacuum packaging!

We know that the aluminum foil vacuum packaging is mainly the food into bags, then take out the air in the bag, vacuum to the expected effect, and blended into nitrogen or other gases, and the sealing, this is vacuum packaging. Main effect of vacuum packing: inhibit microbes growth, avoid pollution of the outside world; Reducing the speed of the oxidation of fat in the meat, the enzyme activity also have certain inhibition; Reduce the water loss, keep the weight of the product; Packaging beautiful, intuitive, enhance the desire to buy, easy to carry. Then the aluminum foil the principle of vacuum packaging is what kind of? This time let's talk about the aluminum foil the principle of vacuum packaging and the use of materials. Aluminum foil vacuum food packaging use anti oxygen permeability and good contractility of poly (vinylidene chloride, polyester, polyamide; Or material such as nylon, polyester film and PE multilayer. Poly (vinylidene chloride to prevent oxygen and water vapor permeability of various coating materials, the biggest drawback is, however, cannot be heat sealing. Polyester has a strong tension strength and soft; Nylon prevent oxygen transmittance is still good, heat resistance, cold resistance is also good, machinery is also very strong, but water vapor transmittance, and expensive, so much as fresh meat in the form of multilayer composite vacuum packaging materials. Here we need to say to a question of common sense, and sometimes we buy frozen smoked food really, we think the food color is a little change, this belongs to the normal like now. Because after vacuum products, aluminum foil vacuum food packaging bags by blocking the oxygen, generally meat will appear dark red. But if removed after packaging, chilled meat in oxygen relapsed into a bright red color, so the aluminum foil vacuum packaging is generally used in storage for a long time and require high quality hotel and some big stores, etc.
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