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A Brief Introduction To The Vacuum Industry
Vacuum, the term is translated from the Latin vacuo, which means nothingness. In fact, vacuum should be understood as a space where the gas is thinner. In a designated space, the state of gas below one atmosphere of pressure is collectively referred to as a vacuum. The degree of thinness of the gas in the vacuum state is called the degree of vacuum, which is usually expressed by the pressure value. Therefore, vacuum packaging is actually not completely vacuum, and the vacuum degree in the food container packaged by vacuum packaging technology is usually 600-1333Pa. Therefore, vacuum packaging is also called decompression packaging or exhaust packaging.
Vacuum packaging technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used in vacuum packaging, and since then, vacuum packaging has developed rapidly.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.
The first period of development from the 1950s to the mid-1980s began with the manufacture of simple air extractors. At that time, there were less than 20 enterprises producing vacuum equipment in the country, and the products were mainly medium and low-grade vacuum equipment, such as mirror coating machine and cigarette packaging machine. From the late 1980s to the entire 1990s is the second period of the development of China's vacuum industry. During this period, the number of production enterprises increased to nearly 3,000, and the number of employees reached 35,000. The overall level of the entire vacuum industry has been greatly improved after the technological transformation of the "Seventh Five-Year Plan" and "Eighth Five-Year Plan". In terms of processing conditions, advanced production equipment such as CNC machine tools in machining centers and resin sand castings began to equip enterprises. By 1996, due to the pull of the magnesium smelting industry, the vacuum industry developed rapidly. With the promotion of small packaging and the development of supermarkets, its scope of application is becoming more and more extensive, and some will gradually replace hard packaging, and the prospect is very good.
Vacuum packaging technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used in vacuum packaging, and since then, vacuum packaging has developed rapidly.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.
The first period of development from the 1950s to the mid-1980s began with the manufacture of simple air extractors. At that time, there were less than 20 enterprises producing vacuum equipment in the country, and the products were mainly medium and low-grade vacuum equipment, such as mirror coating machine and cigarette packaging machine. From the late 1980s to the entire 1990s is the second period of the development of China's vacuum industry. During this period, the number of production enterprises increased to nearly 3,000, and the number of employees reached 35,000. The overall level of the entire vacuum industry has been greatly improved after the technological transformation of the "Seventh Five-Year Plan" and "Eighth Five-Year Plan". In terms of processing conditions, advanced production equipment such as CNC machine tools in machining centers and resin sand castings began to equip enterprises. By 1996, due to the pull of the magnesium smelting industry, the vacuum industry developed rapidly. With the promotion of small packaging and the development of supermarkets, its scope of application is becoming more and more extensive, and some will gradually replace hard packaging, and the prospect is very good.
