真空(kong)充(chong)氣(qi)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)的主要作(zuo)用(yong)除(chu)真空(kong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)所(suo)具備的除(chu)氧保質功能外(wai)，主要 還有(you)(you)(you)(you)(you)抗壓、阻氣(qi)、保鮮等作(zuo)用(yong)，能更(geng)有(you)(you)(you)(you)(you)效(xiao)地 使食(shi)(shi)品(pin)長期保持原有(you)(you)(you)(you)(you)的色(se)、香、味(wei)、形(xing)(xing)及(ji)營養價值。另外(wai)，有(you)(you)(you)(you)(you)許多食(shi)(shi)品(pin)不(bu)(bu)適宜采(cai)用(yong)真空(kong)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)而必須采(cai)用(yong)真空(kong)充(chong)氣(qi)包(bao)(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)(xing)走油食(shi)(shi)品(pin)，有(you)(you)(you)(you)(you)尖銳棱(leng)角或硬度較高會刺破包(bao)(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)(dai)的食(shi)(shi)品(pin)等。食(shi)(shi)品(pin)經真空(kong)充(chong)氣(qi)包(bao)(bao)裝(zhuang)(zhuang)(zhuang)后，包(bao)(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)(dai)內充(chong)氣(qi)壓強大于包(bao)(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)(dai)外(wai)大氣(qi)壓強，能有(you)(you)(you)(you)(you)效(xiao)地防止食(shi)(shi)品(pin)受(shou)壓破碎變形(xing)(xing)并不(bu)(bu)影響包(bao)(bao)裝(zhuang)(zhuang)(zhuang)袋(dai)(dai)(dai)外(wai)觀及(ji) 印刷(shua)裝(zhuang)(zhuang)(zhuang)潢。