真(zhen)(zhen)空(kong)充(chong)氣(qi)包(bao)裝(zhuang)的(de)主要(yao)作用(yong)除真(zhen)(zhen)空(kong)包(bao)裝(zhuang)所具備(bei)的(de)除氧保質功能外(wai)，主要(yao)還有(you)抗壓、阻氣(qi)、保鮮(xian)等(deng)作用(yong)，能更有(you)效地使(shi)食(shi)(shi)品(pin)長期保持原有(you)的(de)色、香、味、形(xing)(xing)及(ji)營養價(jia)值。另外(wai)，有(you)許多食(shi)(shi)品(pin)不適宜采(cai)用(yong)真(zhen)(zhen)空(kong)包(bao)裝(zhuang)而(er)必須采(cai)用(yong)真(zhen)(zhen)空(kong)包(bao)裝(zhuang)機(ji)真(zhen)(zhen)空(kong)充(chong)氣(qi)包(bao)裝(zhuang)。如松脆易碎食(shi)(shi)品(pin)，易結(jie)塊食(shi)(shi)品(pin)，易變形(xing)(xing)走油食(shi)(shi)品(pin)，有(you)尖銳(rui)棱角或硬度較(jiao)高會刺破包(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)氣(qi)包(bao)裝(zhuang)后(hou)，包(bao)裝(zhuang)袋內充(chong)氣(qi)壓強大于包(bao)裝(zhuang)袋外(wai)大氣(qi)壓強，能有(you)效地防止食(shi)(shi)品(pin)受壓破碎變形(xing)(xing)并不影響包(bao)裝(zhuang)袋外(wai)觀及(ji)印(yin)刷裝(zhuang)潢。