Food vacuum pouch's main function is to remove oxygen and prevent food deterioration. Its principle is relatively simple: food mildew deterioration is mainly caused by the activities of microorganisms, and most microorganisms (such as mold and yeast) need oxygen for their survival. Vacuum packaging pouches pump out the oxygen in the bags, making microorganisms lose their living environment, thus obtaining the characteristics of preventing food deterioration.
Experiments show 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 reproduction.
In addition to inhibiting the growth and reproduction of microorganisms, vacuum deaeration has another important function to prevent food oxidation. Oil and fat foods contain a large amount of unsaturated fatty acids, which are oxidized under the action of oxygen, causing food to taste and deteriorate. In addition, oxidation also causes loss of vitamins A and C, and unstable substances in food pigments are affected by oxygen, resulting in darkening of color.Therefore, oxygen removal can effectively prevent food deterioration.