鋁箔袋(dai)抽(chou)真空(kong)(kong)(kong)(kong)。為(wei)(wei)使包(bao)裝(zhuang)(zhuang)內(nei)(nei)(nei)(nei)氧(yang)降至(zhi)最低，應有較大(da)的(de)真空(kong)(kong)(kong)(kong)度(du)。一(yi)般要求腔(qiang)室內(nei)(nei)(nei)(nei)真空(kong)(kong)(kong)(kong)度(du)為(wei)(wei)10至(zhi)30torr。對于腔(qiang)室式(shi)機，一(yi)般以(yi)0.15至(zhi)0.3MPa為(wei)(wei)宜。壓(ya)力過(guo)小，則(ze)因(yin)腔(qiang)室大(da)，充(chong)(chong)(chong)(chong)氣(qi)慢，充(chong)(chong)(chong)(chong)氣(qi)量不足；壓(ya)力過(guo)大(da)，則(ze)包(bao)裝(zhuang)(zhuang)袋(dai)可能脹破。一(yi)般充(chong)(chong)(chong)(chong)氣(qi)后(hou) 包(bao)裝(zhuang)(zhuang)袋(dai)內(nei)(nei)(nei)(nei)壓(ya)力以(yi)不大(da)于0.12MPa為(wei)(wei)宜。 充(chong)(chong)(chong)(chong)氣(qi)時間也依(yi)袋(dai)容積而(er)定，以(yi)袋(dai)飽(bao)滿(man)為(wei)(wei)原則(ze)。鋁箔袋(dai)真空(kong)(kong)(kong)(kong)包(bao)裝(zhuang)(zhuang)機抽(chou)真空(kong)(kong)(kong)(kong)后(hou)，鋁箔袋(dai)包(bao)裝(zhuang)(zhuang)內(nei)(nei)(nei)(nei)難以(yi)做到絕對無氧(yang)。經測定，包(bao)裝(zhuang)(zhuang)內(nei)(nei)(nei)(nei)還有1.6%至(zhi)2.2%的(de)O2。如果包(bao)裝(zhuang)(zhuang)內(nei)(nei)(nei)(nei)還有2%至(zhi)5% O2 ,則(ze)霉(mei)菌、酵母的(de)繁育基本同(tong)在空(kong)(kong)(kong)(kong)氣(qi)中一(yi)樣。 

抽真空時間據產品對(dui)真空度要求和包(bao)裝(zhuang)容積。經實驗(yan)確定。氣(qi)泡袋(dai)充氣(qi)。氣(qi)泡袋(dai)引入充氣(qi)包(bao)裝(zhuang)機的(de)混(hun)合(he)氣(qi)體要有一定的(de)壓力。