真(zhen)空充(chong)(chong)氣(qi)包(bao)裝(zhuang)的(de)主要作(zuo)用(yong)(yong)除(chu)真(zhen)空包(bao)裝(zhuang)所具備的(de)除(chu)氧保(bao)質功能外，主要 還有(you)(you)抗(kang)壓(ya)、阻氣(qi)、保(bao)鮮等(deng)作(zuo)用(yong)(yong)，能更有(you)(you)效(xiao)地 使食(shi)(shi)(shi)(shi)品長期(qi)保(bao)持原有(you)(you)的(de)色、香、味、形及營養價值。另外，有(you)(you)許多食(shi)(shi)(shi)(shi)品不適宜采(cai)用(yong)(yong)真(zhen)空包(bao)裝(zhuang)而必須(xu)采(cai)用(yong)(yong)真(zhen)空充(chong)(chong)氣(qi)包(bao)裝(zhuang)。如松脆易碎食(shi)(shi)(shi)(shi)品，易結塊食(shi)(shi)(shi)(shi)品，易變(bian)形走油食(shi)(shi)(shi)(shi)品，有(you)(you)尖銳棱角或硬度較高會刺破包(bao)裝(zhuang)袋(dai)的(de)食(shi)(shi)(shi)(shi)品等(deng)。食(shi)(shi)(shi)(shi)品經真(zhen)空充(chong)(chong)氣(qi)包(bao)裝(zhuang)后，包(bao)裝(zhuang)袋(dai)內(nei)充(chong)(chong)氣(qi)壓(ya)強大于包(bao)裝(zhuang)袋(dai)外大氣(qi)壓(ya)強，能有(you)(you)效(xiao)地防止(zhi)食(shi)(shi)(shi)(shi)品受(shou)壓(ya)破碎變(bian)形并(bing)不影響包(bao)裝(zhuang)袋(dai)外觀及 印刷裝(zhuang)潢。