真(zhen)空(kong)充(chong)(chong)氣(qi)(qi)(qi)包(bao)裝的(de)(de)(de)主(zhu)要作(zuo)用除(chu)(chu)真(zhen)空(kong)包(bao)裝所具備(bei)的(de)(de)(de)除(chu)(chu)氧保質功能外(wai)，主(zhu)要 還有(you)抗壓(ya)、阻氣(qi)(qi)(qi)、保鮮等作(zuo)用，能更有(you)效地 使食(shi)(shi)(shi)品(pin)長期保持原有(you)的(de)(de)(de)色(se)、香、味、形(xing)及營養價(jia)值。另外(wai)，有(you)許多食(shi)(shi)(shi)品(pin)不(bu)適宜(yi)采用真(zhen)空(kong)包(bao)裝而必須采用真(zhen)空(kong)充(chong)(chong)氣(qi)(qi)(qi)包(bao)裝。如(ru)松脆易(yi)(yi)碎食(shi)(shi)(shi)品(pin)，易(yi)(yi)結塊食(shi)(shi)(shi)品(pin)，易(yi)(yi)變形(xing)走油食(shi)(shi)(shi)品(pin)，有(you)尖銳棱角或(huo)硬度較高(gao)會刺破(po)(po)包(bao)裝袋的(de)(de)(de)食(shi)(shi)(shi)品(pin)等。食(shi)(shi)(shi)品(pin)經真(zhen)空(kong)充(chong)(chong)氣(qi)(qi)(qi)包(bao)裝后，包(bao)裝袋內充(chong)(chong)氣(qi)(qi)(qi)壓(ya)強大于包(bao)裝袋外(wai)大氣(qi)(qi)(qi)壓(ya)強，能有(you)效地防止食(shi)(shi)(shi)品(pin)受壓(ya)破(po)(po)碎變形(xing)并不(bu)影響包(bao)裝袋外(wai)觀(guan)及 印刷裝潢。