真空(kong)充(chong)氣(qi)包(bao)(bao)裝的(de)(de)主(zhu)要(yao)(yao)作(zuo)用(yong)(yong)除(chu)真空(kong)包(bao)(bao)裝所具備的(de)(de)除(chu)氧保(bao)(bao)質功能外(wai)，主(zhu)要(yao)(yao) 還有(you)(you)抗(kang)壓(ya)、阻氣(qi)、保(bao)(bao)鮮等(deng)作(zuo)用(yong)(yong)，能更有(you)(you)效地(di) 使食(shi)品(pin)長(chang)期保(bao)(bao)持(chi)原有(you)(you)的(de)(de)色、香、味、形(xing)(xing)及營養(yang)價值(zhi)。另外(wai)，有(you)(you)許多(duo)食(shi)品(pin)不適宜采用(yong)(yong)真空(kong)包(bao)(bao)裝而必須采用(yong)(yong)真空(kong)充(chong)氣(qi)包(bao)(bao)裝。如松脆易(yi)(yi)碎食(shi)品(pin)，易(yi)(yi)結塊食(shi)品(pin)，易(yi)(yi)變(bian)形(xing)(xing)走油(you)食(shi)品(pin)，有(you)(you)尖銳棱角或硬度較高(gao)會(hui)刺破(po)包(bao)(bao)裝袋(dai)的(de)(de)食(shi)品(pin)等(deng)。食(shi)品(pin)經真空(kong)充(chong)氣(qi)包(bao)(bao)裝后(hou)，包(bao)(bao)裝袋(dai)內(nei)充(chong)氣(qi)壓(ya)強大于(yu)包(bao)(bao)裝袋(dai)外(wai)大氣(qi)壓(ya)強，能有(you)(you)效地(di)防止食(shi)品(pin)受壓(ya)破(po)碎變(bian)形(xing)(xing)并不影(ying)響包(bao)(bao)裝袋(dai)外(wai)觀(guan)及 印刷裝潢。