It is important to extract air in vacuum packaging bag to produce low oxygen effect and prevent food deterioration. The principle of this kind of packing is very simple and easy to understand.
Because food mildew is mainly caused by the activities of microorganisms, and most of the microorganisms need oxygen for survival, so vacuum packaging takes out the oxygen in the packaging bag, making the microorganisms lose the necessities of survival. In addition, the experiment 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 0.5%, most microorganisms will be inhibited and stop breeding.
Another reason for vacuum packaging of three side sealed bags is to prevent food oxidation, because fat food contains a large number of unsaturated fatty acids, which makes food spoilage. In addition, oxidation also causes the loss of vitamin A and vitamin C, making the color darker. Therefore, deoxidization can effectively prevent food deterioration, making the food from leaving the factory to be used can maintain the beauty of color, flavor and fragrance.