在實(shi)(shi)際(ji)生(sheng)產過程(cheng)中，由于(yu)熱(re)(re)封(feng)(feng)(feng)壓力、制袋機速(su)以及(ji)復合基材(cai)(cai)的厚度(du)(du)等多(duo)方面(mian)影響，實(shi)(shi)際(ji)采(cai)用的熱(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)往往要高(gao)于(yu)熱(re)(re)封(feng)(feng)(feng)材(cai)(cai)料的熔融溫(wen)度(du)(du)。熱(re)(re)封(feng)(feng)(feng)的壓力越小，要求(qiu)熱(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)越高(gao)，機速(su)越快，復合膜的面(mian)層材(cai)(cai)料越厚，要求(qiu)的熱(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)也越高(gao)。熱(re)(re)封(feng)(feng)(feng)溫(wen)度(du)(du)若低于(yu)熱(re)(re)封(feng)(feng)(feng)材(cai)(cai)料的軟化點，則無論(lun)怎樣加(jia)大壓力或延熱(re)(re)封(feng)(feng)(feng)時間，均不能(neng)使熱(re)(re)封(feng)(feng)(feng)層真正封(feng)(feng)(feng)合。