真空(kong)(kong)充氣(qi)(qi)包(bao)裝(zhuang)的主(zhu)要(yao)作(zuo)用(yong)除(chu)真空(kong)(kong)包(bao)裝(zhuang)所具備的除(chu)氧保質(zhi)功(gong)能(neng)外(wai)(wai)，主(zhu)要(yao) 還有(you)(you)抗壓(ya)、阻氣(qi)(qi)、保鮮等(deng)(deng)作(zuo)用(yong)，能(neng)更(geng)有(you)(you)效(xiao)(xiao)地 使食(shi)品(pin)(pin)(pin)長期保持(chi)原(yuan)有(you)(you)的色(se)、香(xiang)、味、形(xing)(xing)及營養價值(zhi)。另外(wai)(wai)，有(you)(you)許多食(shi)品(pin)(pin)(pin)不(bu)(bu)適宜采用(yong)真空(kong)(kong)包(bao)裝(zhuang)而必須采用(yong)真空(kong)(kong)充氣(qi)(qi)包(bao)裝(zhuang)。如松脆易(yi)碎食(shi)品(pin)(pin)(pin)，易(yi)結塊食(shi)品(pin)(pin)(pin)，易(yi)變形(xing)(xing)走油食(shi)品(pin)(pin)(pin)，有(you)(you)尖(jian)銳棱(leng)角(jiao)或硬度較(jiao)高(gao)會刺(ci)破(po)包(bao)裝(zhuang)袋(dai)的食(shi)品(pin)(pin)(pin)等(deng)(deng)。食(shi)品(pin)(pin)(pin)經真空(kong)(kong)充氣(qi)(qi)包(bao)裝(zhuang)后，包(bao)裝(zhuang)袋(dai)內充氣(qi)(qi)壓(ya)強大于包(bao)裝(zhuang)袋(dai)外(wai)(wai)大氣(qi)(qi)壓(ya)強，能(neng)有(you)(you)效(xiao)(xiao)地防止食(shi)品(pin)(pin)(pin)受壓(ya)破(po)碎變形(xing)(xing)并不(bu)(bu)影響包(bao)裝(zhuang)袋(dai)外(wai)(wai)觀及 印(yin)刷裝(zhuang)潢。