在實際生產(chan)過(guo)程中，由于熱(re)封(feng)(feng)(feng)(feng)(feng)壓力、制袋機速(su)(su)以及復合(he)基材(cai)的(de)(de)厚度(du)等多方面(mian)影響，實際采用的(de)(de)熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)往(wang)往(wang)要高于熱(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料(liao)(liao)的(de)(de)熔融溫(wen)度(du)。熱(re)封(feng)(feng)(feng)(feng)(feng)的(de)(de)壓力越(yue)(yue)小，要求熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)越(yue)(yue)高，機速(su)(su)越(yue)(yue)快，復合(he)膜的(de)(de)面(mian)層(ceng)材(cai)料(liao)(liao)越(yue)(yue)厚，要求的(de)(de)熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)也越(yue)(yue)高。熱(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)若低于熱(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料(liao)(liao)的(de)(de)軟(ruan)化點，則無論怎樣加大壓力或(huo)延熱(re)封(feng)(feng)(feng)(feng)(feng)時間，均不能使(shi)熱(re)封(feng)(feng)(feng)(feng)(feng)層(ceng)真正封(feng)(feng)(feng)(feng)(feng)合(he)。