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Vacuum packing machine is mostly used in the food industry

Nov 03, 2021

The main function of vacuum packing machine is to remove oxygen to help prevent food from spoiling. The principle is also relatively simple. The mold and spoilage of food is mainly caused by the activities of microorganisms, and most microorganisms (such as molds and yeasts) need oxygen to survive. , And vacuum packaging uses this principle to extract oxygen in the packaging bag and food cells, so that microorganisms lose their living environment. Experiments have proved that when the oxygen concentration in the packaging bag is less than or equal to 1%, the growth and reproduction speed of microorganisms will drop sharply. When the oxygen concentration is less than or equal to 0.5%, most microorganisms will be inhibited and stop reproducing. (Note: Vacuum packaging cannot inhibit the reproduction of anaerobic bacteria and the deterioration and discoloration of food caused by enzyme reactions, so it must be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt Marinated etc.)
In addition to inhibiting the growth and reproduction of microorganisms, vacuum deoxygenation has another important function to prevent food oxidation. Because fats and oils contain a large amount of unsaturated fatty acids, they are oxidized by the action of oxygen, which makes food taste and deteriorate. In addition, oxidation also causes Vitamin A and C are lost, and the unstable substances in food pigments are affected by oxygen to darken the color. Therefore, deoxygenation can effectively prevent food from spoiling.