Vacuum, the term is translated from the Latin vacuo, which means nothingness. In fact, vacuum should be understood as a space where gas is relatively rare. In a designated space, the gas state below one atmospheric pressure is collectively called 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 packed 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 inflation packaging technology was used in small quantities in the early 1990s. With the promotion of small packages and the development of supermarkets, its scope of application has become wider and wider. Some will gradually replace hard packaging, and the prospect is very promising .
Classification of vacuum packaging machines：
1.Food vacuum packaging machine
The food vacuum packaging machine vacuum-packs sausages, meat products, biscuits and other foods. The packaged food can prevent mildew, keep the quality and freshness and prolong the storage period of the product. Just press the vacuum cover to automatically complete the vacuuming and sealing.
2.Desktop vacuum packaging machine
The desktop single-chamber vacuum packaging machine has good vacuum performance and is suitable for vacuum sealing packaging of meat, sauce products, condiments, preserved fruits, grains, soybean products, chemicals, medicinal materials and other granular and liquid products in the food industry. It is suitable for vacuum packaging of various plastic bags and composite bags. The machine is small in size, light in weight and low in energy consumption, and is suitable for shops, supermarkets and households. Vacuumizing, sealing, cooling, air intake to the opening of the machine cover, the whole process is automatically controlled.
3.Tea vacuum packaging machine
Tea vacuum packaging machine uses plastic composite film or plastic aluminum foil composite film as packaging material, for various instruments and medicines, food, fruit, pickles, preserved fruit, aquatic products, native products, chemical raw materials, electronic components and military supplies, etc. No matter it is solid, powdery, pasty or liquid, it can be vacuum heat-sealed and packaged. Due to the high degree of vacuum inside the bag, it can effectively prevent the corruption and deterioration of the items caused by the oxidation of lipid products and the propagation of aerobic bacteria, and achieve quality assurance. , preservation of freshness, taste and color, prolong the storage period of products (commodities), and at the same time, for some soft items, after vacuum packaging, the packaging volume is reduced, which is convenient for transportation and storage.
Application fields of vacuum packaging machine:
Vacuum packaging machine uses plastic or plastic aluminum foil film as packaging material to vacuum liquid, solid, powder paste food, grain, fruit, pickles, preserved fruit, chemicals, medicinal materials, electronic components, precision instruments, rare metals, etc. Packaging, vacuum-packed items can prevent oxidation, mildew, insects, rot, and moisture, and extend the shelf life of quality and freshness. It is especially suitable for tea, food, medicine, shops, research institutions and other industries. It has the advantages of beautiful appearance, compact structure, high efficiency, easy operation, and the bottom has seat wheels for easy movement.
