真(zhen)(zhen)空充(chong)氣(qi)包裝(zhuang)(zhuang)的(de)(de)主(zhu)要作用(yong)除真(zhen)(zhen)空包裝(zhuang)(zhuang)所具備的(de)(de)除氧保(bao)(bao)質功能(neng)外，主(zhu)要 還有(you)(you)抗(kang)壓(ya)、阻氣(qi)、保(bao)(bao)鮮等(deng)作用(yong)，能(neng)更有(you)(you)效(xiao)地 使(shi)食(shi)(shi)(shi)品長期保(bao)(bao)持(chi)原有(you)(you)的(de)(de)色、香、味、形及營養價(jia)值(zhi)。另外，有(you)(you)許(xu)多食(shi)(shi)(shi)品不適宜采(cai)用(yong)真(zhen)(zhen)空包裝(zhuang)(zhuang)而(er)必(bi)須采(cai)用(yong)真(zhen)(zhen)空充(chong)氣(qi)包裝(zhuang)(zhuang)。如松(song)脆(cui)易碎食(shi)(shi)(shi)品，易結(jie)塊食(shi)(shi)(shi)品，易變(bian)形走(zou)油食(shi)(shi)(shi)品，有(you)(you)尖銳(rui)棱角或硬度(du)較(jiao)高會刺(ci)破包裝(zhuang)(zhuang)袋的(de)(de)食(shi)(shi)(shi)品等(deng)。食(shi)(shi)(shi)品經真(zhen)(zhen)空充(chong)氣(qi)包裝(zhuang)(zhuang)后，包裝(zhuang)(zhuang)袋內充(chong)氣(qi)壓(ya)強(qiang)大于包裝(zhuang)(zhuang)袋外大氣(qi)壓(ya)強(qiang)，能(neng)有(you)(you)效(xiao)地防止食(shi)(shi)(shi)品受(shou)壓(ya)破碎變(bian)形并不影(ying)響包裝(zhuang)(zhuang)袋外觀(guan)及 印刷裝(zhuang)(zhuang)潢。