真空(kong)(kong)充(chong)氣包(bao)(bao)裝(zhuang)的主(zhu)要作(zuo)用(yong)除真空(kong)(kong)包(bao)(bao)裝(zhuang)所具備(bei)的除氧保質功能(neng)(neng)外(wai)，主(zhu)要 還有(you)抗(kang)壓、阻氣、保鮮等作(zuo)用(yong)，能(neng)(neng)更有(you)效地(di) 使食(shi)(shi)(shi)品(pin)長期(qi)保持原(yuan)有(you)的色、香、味、形及營養價值。另外(wai)，有(you)許多食(shi)(shi)(shi)品(pin)不適宜(yi)采(cai)(cai)用(yong)真空(kong)(kong)包(bao)(bao)裝(zhuang)而必須采(cai)(cai)用(yong)真空(kong)(kong)充(chong)氣包(bao)(bao)裝(zhuang)。如(ru)松脆易(yi)碎食(shi)(shi)(shi)品(pin)，易(yi)結塊(kuai)食(shi)(shi)(shi)品(pin)，易(yi)變(bian)形走油食(shi)(shi)(shi)品(pin)，有(you)尖(jian)銳棱角或硬度(du)較高會刺破包(bao)(bao)裝(zhuang)袋的食(shi)(shi)(shi)品(pin)等。食(shi)(shi)(shi)品(pin)經真空(kong)(kong)充(chong)氣包(bao)(bao)裝(zhuang)后，包(bao)(bao)裝(zhuang)袋內充(chong)氣壓強大(da)于包(bao)(bao)裝(zhuang)袋外(wai)大(da)氣壓強，能(neng)(neng)有(you)效地(di)防(fang)止食(shi)(shi)(shi)品(pin)受壓破碎變(bian)形并不影響包(bao)(bao)裝(zhuang)袋外(wai)觀及 印刷裝(zhuang)潢(huang)。