在(zai)實際(ji)生產過程(cheng)中，由于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)壓(ya)力(li)(li)、制袋機(ji)速(su)以(yi)及復(fu)合(he)基材(cai)的厚度(du)等多(duo)方面影響，實際(ji)采用的熱(re)(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)往往要高(gao)于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料(liao)的熔融溫(wen)度(du)。熱(re)(re)封(feng)(feng)(feng)(feng)(feng)的壓(ya)力(li)(li)越小，要求熱(re)(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)越高(gao)，機(ji)速(su)越快，復(fu)合(he)膜的面層(ceng)材(cai)料(liao)越厚，要求的熱(re)(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)也(ye)越高(gao)。熱(re)(re)封(feng)(feng)(feng)(feng)(feng)溫(wen)度(du)若低于(yu)熱(re)(re)封(feng)(feng)(feng)(feng)(feng)材(cai)料(liao)的軟(ruan)化點，則(ze)無論怎樣(yang)加大壓(ya)力(li)(li)或延熱(re)(re)封(feng)(feng)(feng)(feng)(feng)時間，均(jun)不能使熱(re)(re)封(feng)(feng)(feng)(feng)(feng)層(ceng)真(zhen)正封(feng)(feng)(feng)(feng)(feng)合(he)。