在實際生產過程中，由(you)于(yu)熱(re)封(feng)(feng)(feng)(feng)壓(ya)力、制袋機速(su)以及(ji)復合基材(cai)(cai)的(de)(de)厚(hou)度(du)等多方面(mian)影響，實際采用(yong)的(de)(de)熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)往往要(yao)高(gao)于(yu)熱(re)封(feng)(feng)(feng)(feng)材(cai)(cai)料(liao)的(de)(de)熔融(rong)溫(wen)(wen)度(du)。熱(re)封(feng)(feng)(feng)(feng)的(de)(de)壓(ya)力越小，要(yao)求熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)越高(gao)，機速(su)越快，復合膜(mo)的(de)(de)面(mian)層材(cai)(cai)料(liao)越厚(hou)，要(yao)求的(de)(de)熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)也越高(gao)。熱(re)封(feng)(feng)(feng)(feng)溫(wen)(wen)度(du)若低(di)于(yu)熱(re)封(feng)(feng)(feng)(feng)材(cai)(cai)料(liao)的(de)(de)軟化點，則無(wu)論怎(zen)樣(yang)加大壓(ya)力或延熱(re)封(feng)(feng)(feng)(feng)時間，均不(bu)能使熱(re)封(feng)(feng)(feng)(feng)層真正(zheng)封(feng)(feng)(feng)(feng)合。