在(zai)實際生產過程中，由于熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)壓(ya)(ya)力(li)、制袋(dai)機速(su)以及復合基(ji)材的厚(hou)度等多方面影(ying)響(xiang)，實際采(cai)用的熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)(wen)度往往要高(gao)于熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)材料的熔融(rong)溫(wen)(wen)(wen)度。熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)的壓(ya)(ya)力(li)越(yue)(yue)小(xiao)，要求(qiu)熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)(wen)度越(yue)(yue)高(gao)，機速(su)越(yue)(yue)快，復合膜(mo)的面層材料越(yue)(yue)厚(hou)，要求(qiu)的熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)(wen)度也越(yue)(yue)高(gao)。熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)(wen)度若低(di)于熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)材料的軟化點，則(ze)無論怎樣加大壓(ya)(ya)力(li)或延熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)時間(jian)，均不能使(shi)熱(re)(re)(re)(re)封(feng)(feng)(feng)(feng)層真正封(feng)(feng)(feng)(feng)合。