真空(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)裝(zhuang)的(de)主要(yao)作(zuo)用(yong)(yong)(yong)除真空(kong)包(bao)(bao)裝(zhuang)所具備的(de)除氧保質(zhi)功(gong)能外(wai)，主要(yao)還有(you)(you)抗壓(ya)、阻氣(qi)(qi)、保鮮等作(zuo)用(yong)(yong)(yong)，能更有(you)(you)效地使(shi)食(shi)(shi)品(pin)(pin)長期保持(chi)原有(you)(you)的(de)色(se)、香、味、形及營養價值。另外(wai)，有(you)(you)許多食(shi)(shi)品(pin)(pin)不適(shi)宜采用(yong)(yong)(yong)真空(kong)包(bao)(bao)裝(zhuang)而(er)必須采用(yong)(yong)(yong)真空(kong)包(bao)(bao)裝(zhuang)機真空(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)裝(zhuang)。如松脆易(yi)碎(sui)食(shi)(shi)品(pin)(pin)，易(yi)結(jie)塊食(shi)(shi)品(pin)(pin)，易(yi)變形走油食(shi)(shi)品(pin)(pin)，有(you)(you)尖(jian)銳棱(leng)角或(huo)硬度(du)較高會刺破包(bao)(bao)裝(zhuang)袋(dai)的(de)食(shi)(shi)品(pin)(pin)等。食(shi)(shi)品(pin)(pin)經真空(kong)充(chong)(chong)氣(qi)(qi)包(bao)(bao)裝(zhuang)后，包(bao)(bao)裝(zhuang)袋(dai)內充(chong)(chong)氣(qi)(qi)壓(ya)強大(da)(da)于包(bao)(bao)裝(zhuang)袋(dai)外(wai)大(da)(da)氣(qi)(qi)壓(ya)強，能有(you)(you)效地防止食(shi)(shi)品(pin)(pin)受壓(ya)破碎(sui)變形并不影響包(bao)(bao)裝(zhuang)袋(dai)外(wai)觀及印刷裝(zhuang)潢。