在實(shi)際生產過程中，由于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)壓力、制(zhi)袋機速(su)以及復(fu)合(he)(he)基材(cai)的(de)厚(hou)度等多方面影響，實(shi)際采用的(de)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)溫(wen)(wen)度往往要(yao)高(gao)于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)材(cai)料的(de)熔融溫(wen)(wen)度。熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)的(de)壓力越(yue)小(xiao)，要(yao)求熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)溫(wen)(wen)度越(yue)高(gao)，機速(su)越(yue)快，復(fu)合(he)(he)膜的(de)面層材(cai)料越(yue)厚(hou)，要(yao)求的(de)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)溫(wen)(wen)度也越(yue)高(gao)。熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)溫(wen)(wen)度若(ruo)低(di)于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)材(cai)料的(de)軟(ruan)化點，則無論(lun)怎(zen)樣加大壓力或延熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)時間，均不能使熱(re)(re)封(feng)(feng)(feng)(feng)(feng)(feng)層真正封(feng)(feng)(feng)(feng)(feng)(feng)合(he)(he)。