在實(shi)際生(sheng)產(chan)過程(cheng)中，由(you)于熱(re)(re)(re)封(feng)(feng)(feng)壓力、制袋機速以及復合(he)基材(cai)的厚度(du)(du)等多方面(mian)影響，實(shi)際采(cai)用的熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)往往要高(gao)于熱(re)(re)(re)封(feng)(feng)(feng)材(cai)料的熔融溫(wen)度(du)(du)。熱(re)(re)(re)封(feng)(feng)(feng)的壓力越小，要求熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)越高(gao)，機速越快，復合(he)膜的面(mian)層材(cai)料越厚，要求的熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)也越高(gao)。熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)若低于熱(re)(re)(re)封(feng)(feng)(feng)材(cai)料的軟化點，則無(wu)論怎樣(yang)加(jia)大壓力或延熱(re)(re)(re)封(feng)(feng)(feng)時間，均不能(neng)使熱(re)(re)(re)封(feng)(feng)(feng)層真正封(feng)(feng)(feng)合(he)。