After the vacuum packaging machine reaches the predetermined vacuum degree, it can automatically pump out the air in the packaging bag to complete the sealing process. Nitrogen or other mixed gas can also be filled in, and then the sealing process is completed. Vacuum packaging machine is often used in food industry, because food can resist oxidation after vacuum packaging, so as to achieve the purpose of long-term preservation.
Vacuum, a term translated from Latin vacuum, means nothingness. In fact, vacuum should be understood as a thinner space for gas. In a specific space, the gas state below one atmosphere is collectively called vacuum. How thin the gas is in a vacuum is called a degree? Ofvacuum), usually expressed by pressure value. Therefore, vacuum packaging is actually not a complete vacuum, and the vacuum degree in food containers packaged by vacuum packaging technology is usually 600- 1333Pa. Therefore, vacuum packaging is also called decompression packaging or exhaust packaging. ? vacuum package machine
Vacuum packaging technology originated in the 1940s. From 65438 to 0950, polyester and polyethylene plastic films were successfully used in vacuum packaging, and then vacuum packaging developed rapidly.
The vacuum packaging technology in China was developed in the early 1980s, while the vacuum inflatable packaging technology was used in small quantities in the early 1990s. With the popularization of small packaging and the development of supermarkets, its application scope is becoming more and more extensive, and some of them will gradually replace hard packaging, with very promising prospects.