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How long can vacuum bags keep

by:Supouches Packaging     2022-08-07
1. The main function is to remove oxygen. In fact, the preservation principle of the vacuum packaging machine is not complicated, and the most important part is to remove the oxygen in the packaged products. Just take out the oxygen in the packaging bag and the food, and then seal the packaging to avoid air entering, and no oxidation reaction will occur, thus achieving the effect of preservation. The use and use of vacuum packaging machines are conducive to preventing food spoilage. The principle shows that the mildew and spoilage of food is mainly caused by the activity of microorganisms, and the survival of most microorganisms requires oxygen, and vacuum packaging uses this principle to put packaging bags The oxygen in the inner and food cells is removed, so that the microorganisms lose the living environment. Vacuum packaging cannot inhibit the reproduction of anaerobic bacteria and the deterioration and discoloration of food caused by enzymatic reactions, so it needs to be combined with other auxiliary methods, such as refrigeration, quick freezing, Dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt pickling, etc. 2, to prevent food oxidation. Because oily food contains a lot of unsaturated fatty acids, it is oxidized by the action of oxygen, which makes the food taste bad and spoiled. In addition, oxidation also causes the loss of vitamin A and vitamin C, and the unstable substances in food coloring are affected by oxygen to darken the color. Therefore, deoxygenation can effectively prevent food spoilage and maintain its color, aroma, taste and nutritional value. 3, the inflation link. The main function of vacuum inflatable packaging is not only the deoxygenation and quality preservation function of vacuum packaging, but also anti-pressure, gas blocking, fresh-keeping and other functions, which can more effectively maintain the original color, aroma, taste, shape and shape of food for a long time. nutritional value. In addition, there are many foods that are not suitable for vacuum packaging, but must be vacuum inflated. Such as crunchy and fragile food, food that is easy to agglomerate, food that is easily deformed and oily, food with sharp edges and corners or high hardness that will pierce the packaging bag, etc. After the food is vacuum-inflated and packaged by the food vacuum packaging machine, the inflation pressure in the packaging bag is stronger than the atmospheric pressure outside the packaging bag, which can effectively prevent the food from being crushed and deformed under pressure, and does not affect the appearance and printing decoration of the packaging bag. The vacuum inflatable packaging is filled with nitrogen, carbon dioxide, oxygen single gas or a mixture of 2-3 gases after vacuum. Among them, nitrogen is an inert gas, which plays a filling role and maintains a positive pressure in the bag to prevent the air outside the bag from entering the bag, and has a protective effect on the food. Carbon oxide gas can be dissolved in various fats or water to form carbonic acid with weak acidity, which has the activity of inhibiting microorganisms such as mold and spoilage bacteria. Oxygen can inhibit the growth and reproduction of anaerobic bacteria, keep fruits and vegetables fresh and color, and high concentration of oxygen can keep fresh meat bright red. The above content is how long the vacuum packaging bag can be stored. For more information, please pay attention to: Paper Plastic Packaging Co., Ltd.
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