真(zhen)空(kong)(kong)充(chong)(chong)氣包(bao)裝(zhuang)(zhuang)(zhuang)的(de)(de)主要作用(yong)(yong)除真(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)(zhuang)所(suo)具備的(de)(de)除氧保質功能(neng)外，主要 還有(you)抗壓(ya)、阻氣、保鮮(xian)等作用(yong)(yong)，能(neng)更(geng)有(you)效(xiao)地 使(shi)食(shi)(shi)品(pin)長期保持原有(you)的(de)(de)色、香、味、形(xing)及營養價(jia)值(zhi)。另外，有(you)許多食(shi)(shi)品(pin)不適宜采用(yong)(yong)真(zhen)空(kong)(kong)包(bao)裝(zhuang)(zhuang)(zhuang)而必須采用(yong)(yong)真(zhen)空(kong)(kong)充(chong)(chong)氣包(bao)裝(zhuang)(zhuang)(zhuang)。如松脆易(yi)碎食(shi)(shi)品(pin)，易(yi)結塊食(shi)(shi)品(pin)，易(yi)變形(xing)走油食(shi)(shi)品(pin)，有(you)尖(jian)銳棱角或硬(ying)度較高會刺(ci)破(po)包(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)的(de)(de)食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經(jing)真(zhen)空(kong)(kong)充(chong)(chong)氣包(bao)裝(zhuang)(zhuang)(zhuang)后(hou)，包(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)內充(chong)(chong)氣壓(ya)強大于包(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)外大氣壓(ya)強，能(neng)有(you)效(xiao)地防止食(shi)(shi)品(pin)受壓(ya)破(po)碎變形(xing)并(bing)不影響包(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)外觀(guan)及 印刷裝(zhuang)(zhuang)(zhuang)潢(huang)。