一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具有(you)高(gao)溫(wen)低(di)溫(wen)的區別，這主要(yao)是以熔點(dian)為依據來劃分的。下面(mian)來介紹下熱熔膠膜高(gao)溫(wen)與低(di)溫(wen)的區別。

1、高溫熱熔膠膜類型

高(gao)溫(wen)(wen)熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)主(zhu)要(yao)是(shi)指(zhi)熔(rong)點溫(wen)(wen)度比較(jiao)高(gao)的熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，其實高(gao)溫(wen)(wen)類型熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)只(zhi)有(you)高(gao)溫(wen)(wen)TPU熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，熔(rong)點溫(wen)(wen)度在(zai)150℃，使(shi)用(yong)溫(wen)(wen)度在(zai)180℃左右(you)(you)。還有(you)一(yi)些中高(gao)溫(wen)(wen)類型熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，主(zhu)要(yao)包括PA熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點120℃，使(shi)用(yong)溫(wen)(wen)度150℃）、PES熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點溫(wen)(wen)度115℃，使(shi)用(yong)溫(wen)(wen)度140℃）和PO熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點在(zai)110℃，使(shi)用(yong)溫(wen)(wen)度140℃左右(you)(you)）以及(ji)中溫(wen)(wen)TPU熱(re)(re)熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點在(zai)110℃，使(shi)用(yong)溫(wen)(wen)度在(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)溫(wen)(wen)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)指的(de)是熔(rong)(rong)(rong)點溫(wen)(wen)度低(di)的(de)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，除(chu)了中高(gao)溫(wen)(wen)和高(gao)溫(wen)(wen)類型(xing)(xing)的(de)，其他材質的(de)都屬于低(di)溫(wen)(wen)類型(xing)(xing)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，主要包括低(di)溫(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)和EVA熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)。其中低(di)溫(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)的(de)熔(rong)(rong)(rong)點溫(wen)(wen)度在70℃，有(you)的(de)型(xing)(xing)號(hao)可(ke)低(di)至五六十度；而EVA的(de)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)熔(rong)(rong)(rong)點主要是在70攝(she)氏(shi)度，低(di)的(de)型(xing)(xing)號(hao)可(ke)以達到(dao)四五十度，具有(you)良(liang)好的(de)耐(nai)低(di)溫(wen)(wen)性能。

3、高溫與低溫熱熔膠膜的區別

兩者最(zui)大(da)的(de)區別(bie)就(jiu)是(shi)熔點不同(tong)，除了熔點的(de)不同(tong)之(zhi)外，在性能和使用范圍上(shang)也有所不同(tong)。低溫(wen)(wen)(wen)熱(re)(re)熔膠膜(mo)主要(yao)是(shi)用在一(yi)些不耐高溫(wen)(wen)(wen)材質(zhi)的(de)材料復合(he)中(zhong)，而高溫(wen)(wen)(wen)熱(re)(re)熔膠膜(mo)主要(yao)應(ying)用在有耐高溫(wen)(wen)(wen)要(yao)求的(de)領域。整體來說的(de)話，高溫(wen)(wen)(wen)熱(re)(re)熔膠膜(mo)的(de)粘接(jie)性能會更好一(yi)點，但是(shi)低溫(wen)(wen)(wen)熱(re)(re)熔膠膜(mo)可以更好地(di)保護材料不受到(dao)熱(re)(re)損(sun)傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)熔(rong)(rong)膠(jiao)膜的(de)特點是需(xu)要加熱(re)熔(rong)(rong)化才具(ju)有黏性(xing)，冷卻硬化后才具(ju)有粘接強(qiang)度。高溫(wen)熱(re)熔(rong)(rong)膠(jiao)膜顧名(ming)思義，就是需(xu)要加熱(re)的(de)溫(wen)度高，相反，低(di)溫(wen)熱(re)熔(rong)(rong)膠(jiao)膜也就是在(zai)低(di)溫(wen)條件(jian)下就可以加熱(re)熔(rong)(rong)化了。

因(yin)為熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜達到一定溫度(du)后(hou)就(jiu)會(hui)(hui)熔(rong)(rong)(rong)化，熔(rong)(rong)(rong)化后(hou)，即使前期已經形成(cheng)良好(hao)的(de)粘(zhan)接(jie)，也會(hui)(hui)再一次失去粘(zhan)接(jie)強度(du)。所以(yi)，熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜的(de)熔(rong)(rong)(rong)化溫度(du)，也就(jiu)是(shi)接(jie)近它(ta)的(de)一個耐溫溫度(du)。超過這個耐溫溫度(du)，熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜就(jiu)會(hui)(hui)失去粘(zhan)接(jie)。所以(yi)，通常(chang)情(qing)況下(xia)，高(gao)(gao)溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜的(de)耐溫性(xing)能(neng)也是(shi)比較高(gao)(gao)的(de)，相反，低溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜它(ta)的(de)耐高(gao)(gao)溫性(xing)能(neng)比較差。

值得(de)一(yi)提的(de)(de)是，熔(rong)(rong)(rong)化溫(wen)度(du)和實(shi)際的(de)(de)熱(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)使(shi)用溫(wen)度(du)是不(bu)一(yi)樣的(de)(de)。熱(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)的(de)(de)實(shi)際使(shi)用溫(wen)度(du)通常會比熔(rong)(rong)(rong)化溫(wen)度(du)高幾(ji)十度(du)。具體高多(duo)少還需要看熱(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)本身的(de)(de)熔(rong)(rong)(rong)指等其(qi)它特性，為的(de)(de)是使(shi)得(de)熱(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)在更短(duan)的(de)(de)時間(jian)內可(ke)以熔(rong)(rong)(rong)化。

通(tong)過上(shang)面的說明(ming)，我們(men)似乎感覺到高(gao)(gao)溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)具有更好的性(xing)能優(you)勢(shi)，能復(fu)合(he)要求更高(gao)(gao)的場合(he)，但實際上(shang)并不是(shi)(shi)(shi)這樣。選擇高(gao)(gao)溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)還(huan)(huan)是(shi)(shi)(shi)低溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)是(shi)(shi)(shi)由復(fu)合(he)的材料(liao)類(lei)型決定的。俗話說，存在即合(he)理！高(gao)(gao)溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)、低溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)本就是(shi)(shi)(shi)為了滿足不同材料(liao)的復(fu)合(he)要求而比(bi)研發推出的，不能單(dan)獨討論是(shi)(shi)(shi)高(gao)(gao)溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)好，還(huan)(huan)是(shi)(shi)(shi)低溫熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)更好。判定哪一種類(lei)型的熱熔(rong)(rong)膠(jiao)(jiao)膜(mo)更好或者更合(he)適，需要根(gen)據(ju)具體的復(fu)合(he)要求來測評、判斷。

在我們的材料粘接應用上，并不是所有場合都需要對熱熔膠膜提出耐高溫的要求，往往低溫的熱熔膠膜就(jiu)可(ke)以符合(he)性能需求。并且，使用低溫熱熔膠膜可(ke)以大大降低能耗，在性能達(da)到要求的基礎上，盡量做(zuo)到節能環保的，這才是我們所追求的。