在實(shi)際(ji)生(sheng)產過(guo)程中(zhong)，由于(yu)熱(re)封(feng)(feng)(feng)壓力、制(zhi)袋(dai)機(ji)速以及(ji)復合基(ji)材(cai)的(de)厚度(du)(du)(du)等多(duo)方(fang)面影響，實(shi)際(ji)采用的(de)熱(re)封(feng)(feng)(feng)溫(wen)(wen)(wen)度(du)(du)(du)往往要(yao)高(gao)于(yu)熱(re)封(feng)(feng)(feng)材(cai)料(liao)(liao)的(de)熔(rong)融溫(wen)(wen)(wen)度(du)(du)(du)。熱(re)封(feng)(feng)(feng)的(de)壓力越(yue)小，要(yao)求熱(re)封(feng)(feng)(feng)溫(wen)(wen)(wen)度(du)(du)(du)越(yue)高(gao)，機(ji)速越(yue)快(kuai)，復合膜(mo)的(de)面層材(cai)料(liao)(liao)越(yue)厚，要(yao)求的(de)熱(re)封(feng)(feng)(feng)溫(wen)(wen)(wen)度(du)(du)(du)也越(yue)高(gao)。熱(re)封(feng)(feng)(feng)溫(wen)(wen)(wen)度(du)(du)(du)若低于(yu)熱(re)封(feng)(feng)(feng)材(cai)料(liao)(liao)的(de)軟化點，則(ze)無論怎樣加大(da)壓力或延熱(re)封(feng)(feng)(feng)時(shi)間(jian)，均不能(neng)使(shi)熱(re)封(feng)(feng)(feng)層真正封(feng)(feng)(feng)合。