采用真空(kong)包(bao)(bao)(bao)裝機(ji)包(bao)(bao)(bao)裝物(wu)(wu)品其特(te)點(dian)有(you)(you)以下(xia)幾個方面:一是(shi)(shi)排除(chu)了包(bao)(bao)(bao)裝容器中的部分(fen)空(kong)氣(qi)(qi)(qi)(氧(yang)氣(qi)(qi)(qi)),能有(you)(you)效(xiao)(xiao)地(di)防(fang)止(zhi)食品腐敗(bai)變質.二是(shi)(shi)采用阻隔性(氣(qi)(qi)(qi)密性)優良的包(bao)(bao)(bao)裝材(cai)料及嚴格的密封技術和要(yao)求,能有(you)(you)效(xiao)(xiao)防(fang)止(zhi)包(bao)(bao)(bao)裝內物(wu)(wu)品的交換,即(ji)可(ke)(ke)避免減重(zhong)、失味,又可(ke)(ke)防(fang)止(zhi)二次污染(ran).三是(shi)(shi)真空(kong)包(bao)(bao)(bao)裝容器內部氣(qi)(qi)(qi)體已(yi)排除(chu),加(jia)速了熱(re)(re)量的傳導,這即(ji)可(ke)(ke)提高殺菌效(xiao)(xiao)率,也避免了加(jia)熱(re)(re)殺菌時(shi),由于氣(qi)(qi)(qi)體的膨脹而(er)使包(bao)(bao)(bao)裝容器破裂.