真空(kong)(kong)充(chong)(chong)(chong)氣(qi)(qi)(qi)包裝在真空(kong)(kong)后再充(chong)(chong)(chong)入(ru)氮(dan)(dan)氣(qi)(qi)(qi)、二(er)氧(yang)化碳(tan)(tan)、氧(yang)氣(qi)(qi)(qi)單一(yi)氣(qi)(qi)(qi)體(ti)或二(er) 三種(zhong)氣(qi)(qi)(qi)體(ti)的(de)(de)混(hun)合氣(qi)(qi)(qi)體(ti)。其氮(dan)(dan)氣(qi)(qi)(qi)是(shi)惰性(xing)氣(qi)(qi)(qi)體(ti),起(qi)充(chong)(chong)(chong)填作(zuo)用(yong),使(shi)袋內保持(chi)正壓 ,以防止袋外空(kong)(kong)氣(qi)(qi)(qi)進入(ru)袋內,對食品起(qi)到一(yi)個保護(hu)作(zuo)用(yong)。其二(er)氧(yang)化碳(tan)(tan)能夠溶(rong)于各類脂肪或水,引(yin)成酸性(xing)較弱的(de)(de)碳(tan)(tan)酸,有抑制霉菌、腐敗細菌等微生物(wu)的(de)(de)活(huo)性(xing)。其氧(yang)氣(qi)(qi)(qi)具有抑制厭氧(yang)菌的(de)(de)生長繁殖,保持(chi)水果(guo)(guo)、蔬菜的(de)(de)新鮮及色彩(cai),高濃度氧(yang)氣(qi)(qi)(qi)可(ke)使(shi)新鮮肉(rou)類保持(chi)其鮮紅色。水果(guo)(guo)蔬菜的(de)(de)新鮮可(ke)是(shi)營養不流失。
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