The main role of the vacuum bag is to remove oxygen, in order to help prevent food spoilage, the principle is also relatively simple, because the food mold spoilage is mainly caused by the activities of microorganisms, and most microorganisms (such as mold and yeast) is the survival of oxygen, and vacuum packaging is the use of this principle, the bag and food cells within the oxygen extraction, so that micro-objects lose the "survival of the environment". Experimental evidence: when the concentration of oxygen in the bag ≤ 1%, the growth and reproduction rate of microorganisms will drop sharply, oxygen concentration ≤ 0.5%, most microorganisms will be inhibited and stop reproducing. (Note: vacuum packaging can not inhibit the reproduction of anaerobic bacteria and enzymatic reactions caused by food deterioration and discoloration, so it also needs to be combined with other auxiliary methods, such as refrigeration, flash-freezing, dehydration, high-temperature sterilization, irradiation sterilization, microwave sterilization, salt pickling, etc.) In addition to inhibiting the growth and reproduction of microorganisms, another important function of vacuum deoxidation is to prevent food oxidation, because oil and grease food contains a large number of unsaturated fatty acids, the role of oxygen and oxidation, so that food tastes bad, deterioration, in addition, the oxidation of vitamin A and C loss, food coloring in the role of unstable substances by the oxygen, so that the color darkened. Therefore, oxygen removal can effectively prevent food spoilage and maintain its color, aroma, taste and nutritional value.
Vacuum packaging bag refers to the product into the airtight packaging container, pumping away the air inside the container, so that the sealed container to a predetermined vacuum degree of a packaging method.
Vacuum bag also known as decompression packaging, is the packaging container of air all out of the seal, maintain the bag in a highly decompressed state, air scarcity is equivalent to the effect of low oxygen, so that microorganisms do not have the conditions of survival, in order to achieve the purpose of fresh fruit, no disease and rot occurrence. Applications include vacuum packaging in plastic bags, aluminum foil packaging, glassware packaging, etc. Packaging materials can be selected according to the type of goods. As the fruit is fresh food, still in respiration, a high degree of oxygen deprivation will cause physiological disease, therefore, the use of vacuum packaging of fruit is less.
Xi'an Xinjiuzhi Packaging and Decoration Co., Ltd. is mainly engaged in the manufacture of plastic products; the manufacture of medical packaging materials; the sales of packaging materials and products; the sales of office supplies; the sales of special packaging equipment; the sales of instruments and meters; the retail of arts and crafts and collectibles (ivory and its products sales of communication equipment; retail of computer software, hardware and auxiliary equipment; sales of digital video surveillance systems.