在實際(ji)生產過程中，由于(yu)(yu)熱(re)封(feng)(feng)(feng)(feng)(feng)壓(ya)力(li)(li)、制袋機速以及復(fu)合(he)(he)基材(cai)的(de)厚(hou)度(du)(du)等多方面影(ying)響，實際(ji)采用的(de)熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)(du)往(wang)往(wang)要(yao)高于(yu)(yu)熱(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料的(de)熔(rong)融(rong)溫(wen)度(du)(du)。熱(re)封(feng)(feng)(feng)(feng)(feng)的(de)壓(ya)力(li)(li)越(yue)小(xiao)，要(yao)求熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)(du)越(yue)高，機速越(yue)快(kuai)，復(fu)合(he)(he)膜的(de)面層(ceng)材(cai)料越(yue)厚(hou)，要(yao)求的(de)熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)(du)也越(yue)高。熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)(du)若低(di)于(yu)(yu)熱(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料的(de)軟化點，則無(wu)論怎樣加大(da)壓(ya)力(li)(li)或(huo)延熱(re)封(feng)(feng)(feng)(feng)(feng)時間(jian)，均不能使熱(re)封(feng)(feng)(feng)(feng)(feng)層(ceng)真正封(feng)(feng)(feng)(feng)(feng)合(he)(he)。