真(zhen)(zhen)空(kong)(kong)充氣包裝的主(zhu)(zhu)要作(zuo)用(yong)除真(zhen)(zhen)空(kong)(kong)包裝所具(ju)備(bei)的除氧保質功能外,主(zhu)(zhu)要還有(you)抗壓、阻氣、保鮮(xian)等(deng)作用(yong)(yong),能(neng)更有效地使食(shi)(shi)(shi)品(pin)(pin)(pin)(pin)長期保持(chi)原有的色、香(xiang)、味、形(xing)及(ji)營(ying)養價值。另(ling)外,有許(xu)多食(shi)(shi)(shi)品(pin)(pin)(pin)(pin)不(bu)適宜采用(yong)(yong)真(zhen)(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)而必須采用(yong)(yong)真(zhen)(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)(zhuang)。如(ru)松脆易(yi)碎食(shi)(shi)(shi)品(pin)(pin)(pin)(pin),易(yi)結塊(kuai)食(shi)(shi)(shi)品(pin)(pin)(pin)(pin),易(yi)變形(xing)走油食(shi)(shi)(shi)品(pin)(pin)(pin)(pin),有尖(jian)銳棱角或(huo)硬(ying)度較高(gao)會刺破包(bao)裝(zhuang)(zhuang)袋的食(shi)(shi)(shi)品(pin)(pin)(pin)(pin)等(deng)。食(shi)(shi)(shi)品(pin)(pin)(pin)(pin)經真(zhen)(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)(zhuang)后,包(bao)裝(zhuang)(zhuang)袋內(nei)充(chong)(chong)氣(qi)壓(ya)強大于包(bao)裝(zhuang)(zhuang)袋外大氣(qi)壓(ya)強,能(neng)有效地防止(zhi)食(shi)(shi)(shi)品(pin)(pin)(pin)(pin)受壓(ya)破碎變形(xing)并(bing)不(bu)影響包(bao)裝(zhuang)(zhuang)袋外觀及(ji) 印(yin)刷裝(zhuang)(zhuang)潢(huang)。真(zhen)(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)裝(zhuang)(zhuang)在真(zhen)(zhen)(zhen)空(kong)后再充(chong)(chong)入氮氣(qi)、二(er)氧化(hua)碳、氧氣(qi)單一氣體或二(er) 三種氣(qi)(qi)(qi)體(ti)的(de)(de)混合氣(qi)(qi)(qi)體(ti)。其氮(dan)氣(qi)(qi)(qi)是惰性(xing)(xing)氣(qi)(qi)(qi)體(ti),起(qi)(qi)充(chong)填作用,使袋(dai)內(nei)保持(chi)(chi)正壓 ,以防止(zhi)袋(dai)外(wai)空氣(qi)(qi)(qi)進入袋(dai)內(nei),對食品起(qi)(qi)到(dao)一個保護作用。其二(er)氧(yang)化碳(tan)能夠溶于(yu)各類脂肪或水(shui),引(yin)成酸性(xing)(xing)較(jiao)弱的(de)(de)碳(tan)酸,有(you)抑(yi)制霉菌(jun)、腐敗細菌(jun)等(deng)微生物(wu)的(de)(de)活性(xing)(xing)。其氧(yang)氣(qi)(qi)(qi)具有(you)抑(yi)制厭氧(yang)菌(jun)的(de)(de)生長繁殖,保持(chi)(chi)水(shui)果、蔬菜的(de)(de)新鮮及色彩,高(gao)濃(nong)度氧(yang)氣(qi)(qi)(qi)可使新鮮肉(rou)類保持(chi)(chi)其鮮紅(hong)色。
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