Analysis of food vacuum packaging machine principle

The main role of the food vacuum packaging is a deaerator, to help prevent food spoilage, its principle is relatively simple, due to the deterioration of food mold rot caused by microbial activity ( granule packing machine http://www.shpackingmachine.com) the survival of most microorganisms (such as molds and yeasts) need oxygen, and vacuum packaging is the use of this principle, deprived of oxygen within the cell packing bags and food, so that the microorganisms lost the living environment. The results show: packaging bags of oxygen concentration ≤ 1% of microbial growth and reproduction rate is a sharp decline in oxygen concentration ≤ 0.5%, the majority of micro-organisms will be inhibited and stop breeding. (Note: The vacuum-packed can not inhibit the propagation of anaerobic bacteria and enzyme reaction caused by food spoilage and discoloration, and therefore need to combine with other helper methods, such as refrigerated, frozen, dehydrated, high-temperature sterilization, irradiation sterilization, microwave sterilization, salt preserved.)

Vacuum oxygen removal in addition to inhibit microbial growth and reproduction, another important function is to prevent food oxidation, due to the fats and oils food contains large amounts of unsaturated fatty acids, and by the role of oxygen and oxidation, make food taste bad, addition, oxidation also allows vitamin A and C losses, unstable substances in the food coloring by the role of oxygen, the color darkens. Therefore, oxygen can effectively prevent the deterioration of food.

Vacuum packaging, in addition to the deaerator shelf life of vacuum-packed with features, the role of the main compressive strength, gas barrier, preservation, can more effectively to make food and long-term to maintain the original color, smell, taste, shape and nutritional value.

In addition, many foods are not suitable for vacuum packaging and vacuum inflatable packaging. Fragile food, easy caking food such as crisp, easy to deform to take the oil food, sharp edges and corners or higher hardness punctured bags of food. Food vacuum inflatable packaging, the packaging bag filling pressure greater than atmospheric pressure bags can effectively prevent the food compressive crushing deformation does not affect the appearance of bags and printing decoration.

Vacuum packaged in a vacuum and then filled with nitrogen, carbon dioxide, oxygen and a single gas or gas mixture of three gases. Nitrogen is an inert gas, since filling the role of the bag to maintain a positive pressure to prevent the bags outside air into the bag, and play a protective role of food. The carbon dioxide can dissolve in various types of fat or water, lead into acid weak carbonic acid, inhibit the activity of mold, spoilage bacteria and other microorganisms. Its oxygen with the inhibition of anaerobic growth and reproduction, to keep fresh fruits, vegetables and color, and high concentrations of oxygen can make fresh meat to maintain its bright red.

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