Application of nitrogen in food packaging
Application of nitrogen in food packaging
Nitrogen is an ideal inert gas and has a special effect in food packaging: it does not react with food and is not absorbed by food. It can reduce the oxygen content in the package and greatly inhibit the growth and reproduction of microorganisms such as bacteria and mold, and slow down the food. Oxidative deterioration and decay, thus keeping food fresh.
At present, nitrogen-filled packaging is rapidly replacing traditional vacuum packaging. It has been used in fried potato chips and french fries, oil-cooked food, etc. It is loved by consumers, especially children and young people. Nitrogen-filled packaging is expected to be used in more foods package.
In the application of nitrogen, it is necessary to pay attention to the purity and quality of nitrogen. The purity of nitrogen separated from compressed air by membrane separation or pressure swing adsorption can reach more than 99.9%. The purity of nitrogen used in food packaging must reach the pure nitrogen level (that is, safety level).
