The term vacuo, translated from the Latin vacuo, means nothing. In fact, a vacuum should be understood as a space with less gas. The states of gas below an atmospheric pressure in a given space are collectively called vacuum. The degree of gas thinning in a vacuum is called degree ofvacuum, which is usually expressed in terms of pressure. Therefore, vacuum packaging is not completely vacuum. The vacuum degree of food containers packed 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. In 1950, polyester, polyethylene plastic film was successfully used in vacuum packaging, vacuum packaging has been rapidly developed since then.



China's vacuum packaging technology was developed in the early 1980s, and vacuum inflatable packaging technology began to use 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 the hard packaging, the prospect is very promising.