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The working principle of the vacuum packaging machine is to remove the oxygen in the packaging bag and the food cells, so that the microorganisms lose the "survival environment", because the deterioration of the food is mainly caused by the activity of microorganisms, and most microorganisms (such as mold and The survival of yeast) requires oxygen. However, experiments have shown that when the oxygen concentration in the package is ≤1%, the growth and reproduction rate of microorganisms drops sharply, the oxygen concentration is ≤0.5%, and most microorganisms will be inhibited and stop breeding. (Note: Vacuum packaging can not inhibit the deterioration and discoloration of food caused by anaerobic bacteria reproduction and enzyme reaction, so it needs to be combined with other auxiliary methods, such as refrigeration, quick freezing, dehydration, high temperature sterilization, irradiation sterilization, microwave sterilization, salt Pickled, etc.)
The main function of vacuum air-packing is not only the anti-oxidation and quality-preserving functions of vacuum packaging, but also the functions of anti-pressure, gas-blocking and fresh-keeping. It can effectively maintain the original color, fragrance, taste and shape of food for a long time. Nutritional value. In addition, there are many foods that are not suitable for vacuum packaging, but must be vacuum-filled. Such as crispy and fragile food, easy to agglomerate food, easy to deform oily food, food with sharp edges or high hardness will pierce the bag. After the food is vacuum-insulated, the inflation pressure in the packaging bag is stronger than the atmospheric pressure outside the packaging bag, which can effectively prevent the food from being crushed and deformed, and does not affect the appearance of the packaging bag and the printing and decoration.
The vacuum inflated package is filled with a single gas of nitrogen, carbon dioxide, oxygen or a mixture of two or three gases after vacuum. Nitrogen is an inert gas that acts as a filling to maintain a positive pressure inside the bag to prevent air outside the bag from entering the bag and to protect the food. Carbon oxide gas can be dissolved in various types of fat or water to form weakly acidic carbonic acid, and has the activity of inhibiting microorganisms such as mold and spoilage bacteria. Oxygen inhibits the growth and reproduction of anaerobic bacteria, keeps the freshness and color of fruits and vegetables, and high-concentration oxygen keeps fresh meats bright red.
Vacuum or vacuum inflating packaging machines are commonly used in both internal vacuum packaging machines and external vacuum packaging machines. The internal vacuum packaging machine is divided into a vacuum packaging machine and a vacuum inflatable packaging machine. The external drawing packaging machine has several functions such as vacuum packaging and vacuum inflation packaging, so it is also called multifunctional air-conditioning packaging machine. Purchasing an excellent vacuum packaging machine depends on the form of the packaged item, the size of the packaging capacity, the production volume, and the packaging method used.
Feel comfortable and natural. Curved three-dimensional cutting, and considerate, at the same time using a soft and dry non-woven surface layer, good air permeability. The user can be dry and clean in any posture.
With leak-proof elastic trousers, the unique U-shaped design gently wraps the legs to effectively prevent urine from leaking sideways, allowing users to be dry and clean under any circumstances.
Food vacuum and vacuum aerated flexible packaging technology occupy a certain position in food packaging technology, and some functions and functions cannot be easily replaced by other packaging technologies. China's vacuum packaging machine technology was developed in the early 1980s, and vacuum inflatable packaging technology began to be used in small quantities in the early 1990s. With the promotion of small packaging and the development of supermarkets, its scope of application will become more and more Wide range, some will gradually replace hard packaging, the prospects are very optimistic.