真空(kong)充(chong)氣(qi)包(bao)(bao)裝(zhuang)的主(zhu)要(yao)作(zuo)用除(chu)真空(kong)包(bao)(bao)裝(zhuang)所具(ju)備的除(chu)氧保質功(gong)能外(wai)(wai)，主(zhu)要(yao) 還有(you)(you)抗(kang)壓(ya)(ya)、阻氣(qi)、保鮮等作(zuo)用，能更有(you)(you)效(xiao)地(di) 使食(shi)(shi)(shi)(shi)品長期保持原有(you)(you)的色(se)、香、味、形及(ji)營養(yang)價(jia)值(zhi)。另外(wai)(wai)，有(you)(you)許多(duo)食(shi)(shi)(shi)(shi)品不適(shi)宜采用真空(kong)包(bao)(bao)裝(zhuang)而(er)必須采用真空(kong)充(chong)氣(qi)包(bao)(bao)裝(zhuang)。如松脆易碎(sui)食(shi)(shi)(shi)(shi)品，易結(jie)塊食(shi)(shi)(shi)(shi)品，易變(bian)(bian)形走(zou)油食(shi)(shi)(shi)(shi)品，有(you)(you)尖銳棱角(jiao)或硬度較(jiao)高(gao)會(hui)刺破包(bao)(bao)裝(zhuang)袋的食(shi)(shi)(shi)(shi)品等。食(shi)(shi)(shi)(shi)品經真空(kong)充(chong)氣(qi)包(bao)(bao)裝(zhuang)后，包(bao)(bao)裝(zhuang)袋內充(chong)氣(qi)壓(ya)(ya)強大(da)于(yu)包(bao)(bao)裝(zhuang)袋外(wai)(wai)大(da)氣(qi)壓(ya)(ya)強，能有(you)(you)效(xiao)地(di)防止食(shi)(shi)(shi)(shi)品受壓(ya)(ya)破碎(sui)變(bian)(bian)形并(bing)不影(ying)響包(bao)(bao)裝(zhuang)袋外(wai)(wai)觀及(ji) 印(yin)刷裝(zhuang)潢。