The vacuum packaging machine can automatically pump out the air in the packaging bag, and complete the sealing process after reaching the predetermined vacuum degree. Vacuum packaging technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used in vacuum packaging. Since then, vacuum packaging has developed rapidly. Vacuum packaging machine is often used in food industry, because after vacuum packaging, food can resist oxidation, thus achieving the purpose of long-term preservation.
There is science research which explains that when the oxygen concentration inside the package decrease to 0.5%, the goods inside is extended to oxidate, no matter it's food articles or other materials. Also the microbes and bacteria inside the package is inhibited to have reproduction and growth except the anaerobic bacteria, this makes the food inside the package not easy to deteriorate.
Maybe you think this is the only advantage of the vacuum packaging machine, but actually it's not the only advantage. There are more benefits we can get from the vacuum packaging machine:
1. Clear out the air (oxygen) in the packaging container, which can effectively prevent the food from spoiling.
2. Using packaging materials with excellent air tightness and strict sealing technology to effectively prevent the exchange of materials in the package, which can prevent the food from losing weight and flavor, and prevent secondary pollution.
3. The air in the vacuum packaging container has been removed, which accelerates the heat conduction, which can improve the thermal sterilization efficiency and avoid the packaging container from cracking due to the expansion of gas during heating sterilization.
4. The vacuumed goods are compressed, so it saves the space for products packaging and goods transportation. This is very obvious when packaging tea, and the bag take less space.