The term "vacuum" in a vacuum bag is translated from Latin vacuo, which means nothingness. In fact, vacuum should be understood as the space where the gas is thinner. In a given space, the state of gas below one atmospheric pressure is collectively referred to as vacuum. The degree of rarefaction of gas in vacuum state is called degree of vacuum, which is usually expressed by pressure value. Therefore, vacuum packaging is not completely vacuum in fact. The vacuum degree in food containers packed with vacuum packaging technology is usually 600-1333pa (standard atmospheric pressure: 101325pa). Therefore, vacuum packaging is also called decompression packaging or exhaust packaging.
Food vacuum packaging bag is widely used in food industry, which is precisely because vacuum packaging draws out all the air in the package and keeps the bag in a high decompression state. The lack of air is equivalent to the effect of low oxygen, which makes microorganisms have no living conditions, so as to achieve the purpose of fresh food and no disease and rot. In addition to inhibiting the growth and reproduction of microorganisms, another important function of vacuum deoxidization is to prevent food oxidation, which is oxidized by oxygen due to the presence of a large number of unsaturated fatty acids in oil and fat foods. In addition, oxidation also causes the loss of vitamin A and C, and the unstable substances in food pigments are affected by oxygen, which makes the color dark. Therefore, deoxidization can effectively prevent food deterioration and maintain its color, aroma, taste and nutritional value. Generally, it plays an important role in salt baked food, pickled vegetables, bean products, meat products, convenience food, soft cans, etc. In addition, many foods are not suitable for vacuum packaging, but must be vacuum inflatable packaging, such as crisp and fragile food, easy to agglomerate food, easy to deform oil food, food with sharp edges or high hardness will puncture the packaging bag, etc. The main function of vacuum inflatable packaging is not only the function of deoxidization and quality guarantee, but also the function of pressure resistance, gas barrier and preservation, which can effectively keep the original color, aroma, taste, shape and nutritional value of food for a long time.
China's vacuum packaging technology was developed in the early 1980s, while the vacuum inflatable packaging technology began to be used in a small amount in the early 1990s. With the promotion of small packaging and the development of supermarkets, its scope of application is more and more extensive, some will gradually replace hard packaging, and the prospect is very good.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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