Vacuum packaging bag, as the name implies, is a packaging method in which the product is added to an airtight packaging container, the air inside the container is removed, and the sealed container reaches a petermined degree of vacuum. Vacuum bag, also known as decompression packaging, is to extract and seal all the air in the packaging container to maintain a high degree of decompression in the bag. The scarcity of air is equivalent to the effect of hypoxia, so that microorganisms have no living conditions, so as to achieve fresh fruit and no disease or rot. purpose of occurrence. The current applications include vacuum packaging in plastic bags, aluminum foil packaging, glassware packaging, etc. Packaging materials can be selected according to the type of item. Since fruit is a fresh food, it is still undergoing respiration, and high hypoxia can cause physiological diseases. Therefore, vacuum packaging is less used for fruit. Vacuum packaging, simply put, its most important role is to remove oxygen, so as to help prevent food spoilage. Vacuum packaging bags, tea packaging bags The principle of vacuum packaging is very simple. The main reason for the deterioration of food mildew is caused by the activities of microorganisms, and the survival of microorganisms (such as mold and yeast) requires oxygen. Vacuum packaging uses this principle to extract oxygen from the packaging bags and food cells. Make microorganisms lose their “living environment”. At the same time, this also prevents the food from becoming stale and deteriorating due to oxidation, so as to achieve the effect of long-term storage and preservation of the food. Main material The performance of food vacuum packaging materials directly affects the storage life of food and changes in taste. In vacuum packaging, the selection of good packaging materials is the key to the success of packaging. [Food packaging bags] Since it comes to the materials of vacuum packaging, the classification of materials is indispensable. The following are the characteristics of materials suitable for vacuum packaging: 1. PE is suitable for low temperature use, and RCPP is suitable for high temperature cooking; 2 , PA is to increase physical strength, puncture resistance; 3, AL aluminum foil is to increase barrier performance, shading; 4, PET, increase mechanical strength, excellent stiffness. Then according to the needs, combinations, various properties, there are also transparent ones, in order to increase the barrier properties, the water-resistant PVA high-barrier coating is used. Composite types are generally: PA/PE or PA/RCPP PET/PE or PET/RCPP also have three or four layers, in order to increase the texture properties of the material: PET/PA/PE PET/AL/RCPP PA/AL/RCPP PET/ PA/AL/RCPP Features: High-temperature cooking bags, vacuum bags are used to package various meat cooked food, easy to use and hygienic. Material: NY/PE, NY/AL/RCPP, NY/PE Features: Moisture-proof, temperature-resistant, shading, fragrance-preserving, toughness Applicable: high-temperature sterilization food, ham, curry, grilled eel, grilled fish and braised meat products. At present, the most widely used vacuum packaging is mainly film materials, of course, bottled and canned are also used. For the film materials used in food vacuum packaging, it is necessary to ensure that the packaging effect, beauty and economy of various foods are in the best state. At the same time, food vacuum packaging also has higher requirements on the light blocking and stability of the material. When these requirements cannot be met with a single material, the package is often composed of a combination of different materials.
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