Screw cap machine and vacuum packaging machine the principle of keeping fresh is what

These two types of machines have in common are pumping air into vacuum state, is what we call oxygen, to help prevent food spoilage, its principle is simple, because food metamorphism causing mold mainly caused by the activity of microorganism, and most of the survival of microorganisms need oxygen machines have in common is the two pumping air into vacuum state, is what we call oxygen, to help prevent food spoilage, its principle is simple, 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. 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 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. Small vacuum packaging machine as long as can reach a certain vacuum degree, the same effect. The wide use of these two types of machinery, makes the product life cycle of the plant, for enterprises, save production cost, for us, can eat is relatively safe and fresh food, for society as a whole, improve the food security, reduced the waste, save social environmental resources, also reduced the waste, improve the environment of health, can say the device.