真空(kong)充(chong)(chong)氣(qi)包裝(zhuang)(zhuang)的主要作用(yong)(yong)(yong)除真空(kong)包裝(zhuang)(zhuang)所具備(bei)的除氧保(bao)質功能外(wai)(wai)，主要 還有(you)(you)(you)抗壓、阻氣(qi)、保(bao)鮮等(deng)作用(yong)(yong)(yong)，能更有(you)(you)(you)效(xiao)地 使食(shi)(shi)(shi)品長期保(bao)持(chi)原有(you)(you)(you)的色、香、味、形(xing)及(ji)(ji)營養(yang)價值。另外(wai)(wai)，有(you)(you)(you)許多(duo)食(shi)(shi)(shi)品不適宜采用(yong)(yong)(yong)真空(kong)包裝(zhuang)(zhuang)而必須(xu)采用(yong)(yong)(yong)真空(kong)充(chong)(chong)氣(qi)包裝(zhuang)(zhuang)。如松脆易碎食(shi)(shi)(shi)品，易結塊食(shi)(shi)(shi)品，易變(bian)(bian)形(xing)走(zou)油(you)食(shi)(shi)(shi)品，有(you)(you)(you)尖銳棱角(jiao)或硬度較(jiao)高會刺破包裝(zhuang)(zhuang)袋的食(shi)(shi)(shi)品等(deng)。食(shi)(shi)(shi)品經(jing)真空(kong)充(chong)(chong)氣(qi)包裝(zhuang)(zhuang)后(hou)，包裝(zhuang)(zhuang)袋內充(chong)(chong)氣(qi)壓強(qiang)大于包裝(zhuang)(zhuang)袋外(wai)(wai)大氣(qi)壓強(qiang)，能有(you)(you)(you)效(xiao)地防止食(shi)(shi)(shi)品受壓破碎變(bian)(bian)形(xing)并不影(ying)響包裝(zhuang)(zhuang)袋外(wai)(wai)觀及(ji)(ji) 印刷裝(zhuang)(zhuang)潢。