在實(shi)際生產過(guo)程中，由(you)于(yu)熱(re)封(feng)(feng)(feng)(feng)壓力(li)、制(zhi)袋(dai)機(ji)速以(yi)及復合基材的厚度(du)等(deng)多方面影(ying)響，實(shi)際采用的熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)往往要高(gao)于(yu)熱(re)封(feng)(feng)(feng)(feng)材料的熔融溫(wen)(wen)度(du)。熱(re)封(feng)(feng)(feng)(feng)的壓力(li)越(yue)(yue)小，要求(qiu)熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)越(yue)(yue)高(gao)，機(ji)速越(yue)(yue)快，復合膜的面層材料越(yue)(yue)厚，要求(qiu)的熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)也越(yue)(yue)高(gao)。熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)若(ruo)低于(yu)熱(re)封(feng)(feng)(feng)(feng)材料的軟化點(dian)，則無論怎樣加大壓力(li)或延熱(re)封(feng)(feng)(feng)(feng)時間，均不能使熱(re)封(feng)(feng)(feng)(feng)層真(zhen)正封(feng)(feng)(feng)(feng)合。