食品包装における窒素の利用
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.
窒素の適用では、窒素の純度と品質に注意を払う必要があります。膜分離または圧力スイング吸着によって圧縮空気から分離された窒素の純度は、99.9％以上に達することがあります。食品包装に使用される窒素の純度は、純粋な窒素レベル（つまり、安全レベル）に達している必要があります。
