Vacuum, the term is translated from the Latin vacuo, its meaning is nothing. In fact, vacuum should be understood as a space where gas is thin. In a given space, the state of the gas below one atmospheric pressure is collectively referred to as vacuum. The degree of gas thinness in a vacuum state is called a degree of vacuum, and is usually expressed by a pressure value. Therefore, the vacuum packaging is not actually completely vacuum, and the vacuum in the food container packaged by the vacuum packaging technique is usually 600-1333 Pa. Therefore, the vacuum packaging is also referred to as a vacuum packaging or an exhaust packaging.
Vacuum packaging technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used for vacuum packaging, and vacuum packaging was rapidly developed.
China's vacuum packaging 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 is more and more extensive. Some will gradually replace hard packaging, and the prospects are very promising.
