Is the main purpose of food vacuum bag oxygen, to help prevent food spoilage, its principle is simple, because food metamorphism causing mold mainly caused by the activity of microorganism, and most microorganisms (
Such as mold and yeast)
Survival is need oxygen, and vacuum packing is using this principle, the packaging and food within the cell oxygen smoke, lose microbial survival environment.
experiments show: when the concentration of oxygen in the packaging 1% or less, microbial growth and reproduction rate fell sharply, oxygen concentration 0 or less.
5%, most microbes will be reined in and stop breeding.
vacuum deaeration besides inhibiting microbial growth and reproduction, another important function is to prevent the oxidation of the food, because the oil kind food contains A lot of unsaturated fatty acid, by the effect of oxygen oxidation, sour food, deterioration, in addition, the oxidation also make vitamin A and C loss, volatile substances in food pigment by the role of oxygen, make the color darker.
So oxygen can effectively prevent food spoilage.