Vacuum packaging can save how long?

1, the main effect is oxygen. It doesn't really complex principle of preservation of vacuum packaging machine, one of the most important a link to remove the oxygen packaging products. Just the oxygen within the packaging and food out seal again, avoid air into the, reflects the oxide will happen, so that to reach the effect of preservation. Use and the use of vacuum packaging machine is beneficial to prevent food spoilage, its principle, because food metamorphism causing mold mainly caused by the activity of microorganism, and most of the survival of microorganisms need oxygen, and vacuum packing is using this principle, the packaging and food within the cell oxygen smoke, lose microbiology & other The survival of the environment & throughout; 。 Vacuum packing can inhibit anaerobic bacteria breeding and enzyme reaction caused by food metamorphism and discoloration, so still need to combine with other auxiliary methods, such as cold storage, frozen, dehydrated, high temperature sterilization, irradiation sterilization, microwave sterilization, salting, and so on. 2, prevent the oxidation of the food. Because of 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 vitamin C loss, food pigment in the volatile substances by the role of oxygen, make the color darker. So oxygen can effectively prevent food spoilage, maintain its color, aroma, taste and nutritional value. 3, inflatable link. In addition to the main function of vacuum packaging vacuum packaging quality of deoxidization function, main and compressive strength, the air resistance, the preservation effect, can more effectively to make food for a long time to keep the original color, aroma, taste, shape, and nutritional value. In addition, there are many food should not be using vacuum packaging, vacuum packaging must be used. Such as crisp fragile food, nutrition food, easy deformation and oil food, there are sharp edges or high hardness will puncture bag food, etc. Food after food vacuum packaging machine, vacuum packaging, packaging bags inside air pressure is greater than the atmospheric pressure outside packing bag, can effectively prevent the crushing of the food compression deformation, does not affect the packaging and printing packaging appearance. Vacuum packed in vacuum and then filling the nitrogen, carbon dioxide, oxygen, single or 2 - gas Three kinds of a mixture of gases. Nitrogen is inert, filling effect, make the bag to maintain positive pressure, in order to prevent the outside air into the bag, bag of food plays a protective role. Carbon oxide gas or water can dissolve all kinds of fat, formation of weak acid, carbonate, corruption has inhibitory activity of bacteria and other microorganisms. Oxygen could inhibit the growth of anaerobic bacteria breeding, keep fruits, vegetables, fresh and color, high concentration of oxygen to keep fresh meat, its bright red.