真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)的(de)主要(yao)作用(yong)(yong)除(chu)真(zhen)(zhen)空(kong)包(bao)(bao)裝(zhuang)所具備的(de)除(chu)氧保(bao)質(zhi)功能(neng)外(wai)，主要(yao)還有(you)抗壓、阻氣(qi)、保(bao)鮮(xian)等(deng)作用(yong)(yong)，能(neng)更有(you)效地(di)(di)使食(shi)(shi)品(pin)長期保(bao)持原有(you)的(de)色、香、味、形及營養價值。另外(wai)，有(you)許多食(shi)(shi)品(pin)不適(shi)宜采用(yong)(yong)真(zhen)(zhen)空(kong)包(bao)(bao)裝(zhuang)而必(bi)須采用(yong)(yong)真(zhen)(zhen)空(kong)包(bao)(bao)裝(zhuang)機(ji)真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)。如(ru)松脆易碎食(shi)(shi)品(pin)，易結塊食(shi)(shi)品(pin)，易變形走油食(shi)(shi)品(pin)，有(you)尖(jian)銳棱(leng)角或硬(ying)度較高會刺破(po)包(bao)(bao)裝(zhuang)袋的(de)食(shi)(shi)品(pin)等(deng)。食(shi)(shi)品(pin)經真(zhen)(zhen)空(kong)充(chong)(chong)氣(qi)包(bao)(bao)裝(zhuang)后(hou)，包(bao)(bao)裝(zhuang)袋內充(chong)(chong)氣(qi)壓強大于包(bao)(bao)裝(zhuang)袋外(wai)大氣(qi)壓強，能(neng)有(you)效地(di)(di)防(fang)止(zhi)食(shi)(shi)品(pin)受(shou)壓破(po)碎變形并不影響包(bao)(bao)裝(zhuang)袋外(wai)觀及印刷裝(zhuang)潢。