在實(shi)(shi)際(ji)(ji)生(sheng)產過程(cheng)中(zhong)，由于熱(re)封(feng)(feng)壓(ya)力、制袋機(ji)速(su)以及復(fu)合(he)基材(cai)的厚度(du)(du)等多方面(mian)影響，實(shi)(shi)際(ji)(ji)采用的熱(re)封(feng)(feng)溫(wen)(wen)度(du)(du)往往要高于熱(re)封(feng)(feng)材(cai)料(liao)的熔(rong)融溫(wen)(wen)度(du)(du)。熱(re)封(feng)(feng)的壓(ya)力越(yue)小(xiao)，要求熱(re)封(feng)(feng)溫(wen)(wen)度(du)(du)越(yue)高，機(ji)速(su)越(yue)快，復(fu)合(he)膜的面(mian)層材(cai)料(liao)越(yue)厚，要求的熱(re)封(feng)(feng)溫(wen)(wen)度(du)(du)也越(yue)高。熱(re)封(feng)(feng)溫(wen)(wen)度(du)(du)若低于熱(re)封(feng)(feng)材(cai)料(liao)的軟化點，則(ze)無論(lun)怎樣加(jia)大壓(ya)力或(huo)延熱(re)封(feng)(feng)時(shi)間，均不能使熱(re)封(feng)(feng)層真正(zheng)封(feng)(feng)合(he)。