Food Vacuum Packaging Machine - Extend Food Shelf Life1
Vacuum, the term is translated from the Latin vacuo, which means nothingness. In fact, vacuum should be understood as a space where the gas is thinner. In a designated space, the state of gas below one atmosphere of pressure is collectively referred to as a vacuum. The degree of thinness of the gas in the vacuum state is called the degree of vacuum, which is usually expressed by the pressure value. Therefore, vacuum packaging is actually not completely vacuum, and the vacuum degree in the food container packaged by vacuum packaging technology is usually 600-1333Pa. Therefore, vacuum packaging is also called decompression packaging or exhaust packaging. The food vacuum packaging machine packs the food into the packaging bag, draws out the air in the packaging bag, and completes the sealing process when the predetermined vacuum degree is reached. In the food industry, vacuum packaging applications are very common, various cooked products such as chicken legs, ham, sausages, grilled fish fillets, beef jerky, etc.; pickled products such as various pickles, bean products, preserved fruits and other foods that need to be kept fresh Vacuum packaging is increasingly being used. Vacuum-packed food has a long shelf life, which greatly extends the shelf life of the food. Use technical vacuum inflatable packaging to put food into packaging bags, extract the air in the packaging bags to reach a predetermined vacuum degree, then fill with nitrogen or other mixed gases, and then complete the sealing process. Vacuum packaging technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used in vacuum packaging, and since then, vacuum packaging has developed rapidly. my country's vacuum packaging technology was developed in the early 1980s, and the 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 has become more and more extensive. Some will gradually replace hard packaging, and the prospects are very promising. The advantages of food vacuum packaging: · Eliminate part of the air (oxygen) in the packaging container, which can effectively prevent food spoilage; · Use packaging materials with excellent barrier (air tightness) and strict sealing technology and requirements, which can effectively To prevent the exchange of the contents of the package, it can avoid the weight loss and taste loss of the food, and it can also prevent secondary pollution; The gas inside the vacuum packaging container has been eliminated, which accelerates the conduction of heat, which can improve the thermal sterilization efficiency and avoid the During heat sterilization, the packaging container is ruptured due to the expansion of the gas;
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