在實(shi)際生產過程(cheng)中，由于熱(re)(re)(re)封(feng)(feng)(feng)壓(ya)力(li)(li)、制袋機(ji)速以及復(fu)合(he)(he)基材(cai)的厚度(du)(du)等多方面影響，實(shi)際采(cai)用的熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)(wen)度(du)(du)往往要(yao)高于熱(re)(re)(re)封(feng)(feng)(feng)材(cai)料(liao)(liao)的熔融溫(wen)(wen)度(du)(du)。熱(re)(re)(re)封(feng)(feng)(feng)的壓(ya)力(li)(li)越(yue)(yue)(yue)(yue)小，要(yao)求熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)(wen)度(du)(du)越(yue)(yue)(yue)(yue)高，機(ji)速越(yue)(yue)(yue)(yue)快，復(fu)合(he)(he)膜的面層材(cai)料(liao)(liao)越(yue)(yue)(yue)(yue)厚，要(yao)求的熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)(wen)度(du)(du)也越(yue)(yue)(yue)(yue)高。熱(re)(re)(re)封(feng)(feng)(feng)溫(wen)(wen)度(du)(du)若低(di)于熱(re)(re)(re)封(feng)(feng)(feng)材(cai)料(liao)(liao)的軟(ruan)化點，則無論怎樣(yang)加大(da)壓(ya)力(li)(li)或延熱(re)(re)(re)封(feng)(feng)(feng)時間，均(jun)不能使熱(re)(re)(re)封(feng)(feng)(feng)層真正封(feng)(feng)(feng)合(he)(he)。