Vacuum, the term is translated from the Latin vacuo, meaning nothingness. In fact, the vacuum should be understood as gas thinner space. In the specified space, the gas state below an atmospheric pressure is collectively referred to as a vacuum. The rarefied degree of gas in a vacuum is called a vacuum degree (degree ofvacuum), usually expressed as a pressure value. Therefore, vacuum packaging is not in fact completely vacuum, the vacuum in food containers packaged by vacuum packaging technology is usually 600-1333pa. Therefore, the vacuum packaging is called decompression packaging or exhaust packaging.
Vacuum packaging technology originated in the 1940s. 1950, Polyester, polyethylene plastic film successfully used in vacuum packaging, since then, the vacuum packaging has been rapidly developed.
China's vacuum packaging technology was developed in the early 80 's, and the vacuum inflatable packaging technology in the early 90 began a small amount of use, with the promotion of small packaging and the development of supermarkets, the scope of its application more and more extensive, some will gradually replace the hard packaging, the prospects are very optimistic.