真空(kong)(kong)(kong)充氣(qi)(qi)(qi)包(bao)(bao)裝的(de)主要作(zuo)用除真空(kong)(kong)(kong)包(bao)(bao)裝所具(ju)備的(de)除氧保(bao)質功能外(wai)，主要還有(you)(you)(you)(you)抗壓、阻氣(qi)(qi)(qi)、保(bao)鮮等作(zuo)用，能更(geng)有(you)(you)(you)(you)效(xiao)地使(shi)食(shi)品(pin)長期保(bao)持原有(you)(you)(you)(you)的(de)色、香、味、形(xing)及(ji)營養價值。另外(wai)，有(you)(you)(you)(you)許多食(shi)品(pin)不適(shi)宜(yi)采用真空(kong)(kong)(kong)包(bao)(bao)裝而必須采用真空(kong)(kong)(kong)包(bao)(bao)裝機真空(kong)(kong)(kong)充氣(qi)(qi)(qi)包(bao)(bao)裝。如松脆易(yi)碎食(shi)品(pin)，易(yi)結(jie)塊食(shi)品(pin)，易(yi)變形(xing)走油食(shi)品(pin)，有(you)(you)(you)(you)尖銳棱(leng)角或硬(ying)度(du)較高(gao)會刺破(po)包(bao)(bao)裝袋的(de)食(shi)品(pin)等。食(shi)品(pin)經真空(kong)(kong)(kong)充氣(qi)(qi)(qi)包(bao)(bao)裝后，包(bao)(bao)裝袋內充氣(qi)(qi)(qi)壓強(qiang)大于包(bao)(bao)裝袋外(wai)大氣(qi)(qi)(qi)壓強(qiang)，能有(you)(you)(you)(you)效(xiao)地防止食(shi)品(pin)受壓破(po)碎變形(xing)并不影響包(bao)(bao)裝袋外(wai)觀及(ji)印(yin)刷裝潢(huang)。