Vacuum packaging technology originated in the 1940s. Since the successful application of polyester and polyethylene plastic films in commodity packaging in 1950, vacuum packaging machines have developed rapidly, and their technological development trends are mainly reflected in high productivity, automation, single-machine multi-function, production lines, and the use of related new technologies. These 5 aspects. To

　　 1. High productivity. The productivity of the vacuum packaging machine has grown from a few pieces per minute to several 10 pieces, and the productivity of the thermoforming-filling-sealing machine can reach more than 500 pieces/min. To

　　2, automation. The fully automatic vacuum packaging machine has the functions of vacuuming, sealing, printing, and cooling at one time. It is mainly used for packaging tea, peanuts, shrimps, corn and other foods.

　　3, stand-alone multi-function. Multi-functions can be realized on a single machine, which can easily expand the scope of use. To realize the multi-function of a single machine, a modular design must be adopted. Through the transformation and combination of functional modules, it becomes a vacuum packaging machine of different types suitable for different packaging materials, packaging items, and packaging requirements. To

　　4. Form a production line. When more and more functions are required, concentrating all the functions on a single machine will make the structure very complicated and inconvenient to operate and maintain. At this time, several machines with different functions and matching efficiencies can be combined into a more complete function. production line. To

　　 5. Adopt related new technologies. In the packaging method, a large number of inflatable packaging is used instead of vacuum packaging, and the research of inflatable ingredients, packaging materials and inflatable packaging machines are closely combined; in control technology, more computer technology and microelectronic technology are used; in sealing With heat pipe and cold sealing technology, advanced devices can also be directly installed on the vacuum packaging machine, such as a computer-controlled high-precision combination weigher for coarse-grained materials; on rotary or vacuum packaging machines, advanced high-speed arc surface cam indexing is used Machinery etc.