真空(kong)(kong)充(chong)氣(qi)(qi)包(bao)裝(zhuang)(zhuang)的(de)(de)主(zhu)要作用(yong)(yong)(yong)除(chu)真空(kong)(kong)包(bao)裝(zhuang)(zhuang)所具備的(de)(de)除(chu)氧保質(zhi)功(gong)能外，主(zhu)要 還有(you)抗壓(ya)(ya)、阻氣(qi)(qi)、保鮮等作用(yong)(yong)(yong)，能更有(you)效地 使食(shi)(shi)(shi)品(pin)長期保持(chi)原有(you)的(de)(de)色、香(xiang)、味、形(xing)及(ji)營養價值。另(ling)外，有(you)許(xu)多食(shi)(shi)(shi)品(pin)不(bu)適宜采用(yong)(yong)(yong)真空(kong)(kong)包(bao)裝(zhuang)(zhuang)而(er)必須采用(yong)(yong)(yong)真空(kong)(kong)充(chong)氣(qi)(qi)包(bao)裝(zhuang)(zhuang)。如松脆易碎食(shi)(shi)(shi)品(pin)，易結塊食(shi)(shi)(shi)品(pin)，易變形(xing)走油食(shi)(shi)(shi)品(pin)，有(you)尖(jian)銳棱角或硬度較高會刺破包(bao)裝(zhuang)(zhuang)袋(dai)的(de)(de)食(shi)(shi)(shi)品(pin)等。食(shi)(shi)(shi)品(pin)經真空(kong)(kong)充(chong)氣(qi)(qi)包(bao)裝(zhuang)(zhuang)后，包(bao)裝(zhuang)(zhuang)袋(dai)內充(chong)氣(qi)(qi)壓(ya)(ya)強(qiang)(qiang)大于包(bao)裝(zhuang)(zhuang)袋(dai)外大氣(qi)(qi)壓(ya)(ya)強(qiang)(qiang)，能有(you)效地防止食(shi)(shi)(shi)品(pin)受壓(ya)(ya)破碎變形(xing)并不(bu)影響(xiang)包(bao)裝(zhuang)(zhuang)袋(dai)外觀及(ji) 印(yin)刷(shua)裝(zhuang)(zhuang)潢。