The main function of vacuum packaging is to remove all kinds of gases in the air, in order to help prevent food deterioration. Because food moldy deterioration is mainly caused by the activities of microorganisms, and most microorganisms (such as mold and yeast) need oxygen to survive, vacuum packaging is the use of this principle, the oxygen out the packaging bag, so that the micro matter lose the living environment.
In addition to inhibiting the growth and reproduction of microorganisms, another important function of vacuum in addition to oxygen is to prevent food oxidation, because of fat food contains a large number of unsaturated fatty acids, oxidation by oxygen, so that food taste, metamorphism. In addition, unstable substances in food pigments are affected by oxygen, which darkens the color. Therefore, deoxygenation can effectively prevent food spoilage, maintain its color, aroma, taste and nutritional value. It has great commercial value.
Vacuum packing machine is a new packaging way of environmental protection and health. After the bag is vacuumed, it automatically seals the bag immediately. Because of the high vacuum degree in the bag, the residual air is less, the reproduction of microorganisms is inhibited, and the oxidation, mildew and decay of the goods are avoided. At the same time for some soft articles after vacuum packaging, packaging volume can be reduced, easy to transport and storage.