一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具(ju)有(you)高溫低溫的(de)區別(bie)(bie)，這主要是以熔(rong)點為依據來(lai)劃分的(de)。下(xia)面(mian)來(lai)介紹下(xia)熱熔(rong)膠膜高溫與低溫的(de)區別(bie)(bie)。

1、高溫熱熔膠膜類型

高溫(wen)(wen)(wen)(wen)(wen)熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)主要是(shi)指熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)(wen)度比較高的熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，其實高溫(wen)(wen)(wen)(wen)(wen)類型熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)只有(you)(you)高溫(wen)(wen)(wen)(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)(wen)度在150℃，使用(yong)(yong)溫(wen)(wen)(wen)(wen)(wen)度在180℃左右。還有(you)(you)一(yi)些中高溫(wen)(wen)(wen)(wen)(wen)類型熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，主要包括PA熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)120℃，使用(yong)(yong)溫(wen)(wen)(wen)(wen)(wen)度150℃）、PES熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)(wen)度115℃，使用(yong)(yong)溫(wen)(wen)(wen)(wen)(wen)度140℃）和PO熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在110℃，使用(yong)(yong)溫(wen)(wen)(wen)(wen)(wen)度140℃左右）以(yi)及中溫(wen)(wen)(wen)(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在110℃，使用(yong)(yong)溫(wen)(wen)(wen)(wen)(wen)度在140℃）。

2、低溫熱熔膠膜類型

低(di)溫(wen)(wen)熱(re)(re)熔(rong)膠膜(mo)指(zhi)的(de)(de)是熔(rong)點(dian)溫(wen)(wen)度(du)低(di)的(de)(de)熱(re)(re)熔(rong)膠膜(mo)，除了中高(gao)溫(wen)(wen)和(he)高(gao)溫(wen)(wen)類型的(de)(de)，其他材質的(de)(de)都屬于低(di)溫(wen)(wen)類型熱(re)(re)熔(rong)膠膜(mo)，主要包括(kuo)低(di)溫(wen)(wen)TPU熱(re)(re)熔(rong)膠膜(mo)和(he)EVA熱(re)(re)熔(rong)膠膜(mo)。其中低(di)溫(wen)(wen)TPU熱(re)(re)熔(rong)膠膜(mo)的(de)(de)熔(rong)點(dian)溫(wen)(wen)度(du)在70℃，有的(de)(de)型號(hao)可低(di)至(zhi)五六十度(du)；而EVA的(de)(de)熱(re)(re)熔(rong)膠膜(mo)熔(rong)點(dian)主要是在70攝(she)氏度(du)，低(di)的(de)(de)型號(hao)可以達到(dao)四五十度(du)，具有良好的(de)(de)耐低(di)溫(wen)(wen)性(xing)能(neng)。

3、高溫與低溫熱熔膠膜的區別

兩者最大的(de)(de)區別(bie)就是熔(rong)點不同，除了熔(rong)點的(de)(de)不同之外，在(zai)性(xing)能和(he)使用(yong)范圍(wei)上也有(you)所不同。低溫熱(re)(re)熔(rong)膠膜(mo)主要是用(yong)在(zai)一(yi)些不耐高(gao)溫材質的(de)(de)材料復合中，而高(gao)溫熱(re)(re)熔(rong)膠膜(mo)主要應(ying)用(yong)在(zai)有(you)耐高(gao)溫要求的(de)(de)領域。整體來說的(de)(de)話，高(gao)溫熱(re)(re)熔(rong)膠膜(mo)的(de)(de)粘(zhan)接性(xing)能會更(geng)好一(yi)點，但是低溫熱(re)(re)熔(rong)膠膜(mo)可以更(geng)好地保護材料不受(shou)到熱(re)(re)損(sun)傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)(re)(re)熔膠膜的特點是(shi)需(xu)要加(jia)熱(re)(re)(re)熔化才具(ju)有黏性，冷卻硬化后(hou)才具(ju)有粘接強度(du)。高溫熱(re)(re)(re)熔膠膜顧(gu)名思(si)義，就是(shi)需(xu)要加(jia)熱(re)(re)(re)的溫度(du)高，相反(fan)，低溫熱(re)(re)(re)熔膠膜也就是(shi)在(zai)低溫條(tiao)件下就可以加(jia)熱(re)(re)(re)熔化了。

因為熱熔(rong)膠(jiao)膜(mo)(mo)達到(dao)一(yi)(yi)定溫(wen)(wen)(wen)度(du)后就會(hui)(hui)熔(rong)化，熔(rong)化后，即使前期已經形(xing)成良(liang)好的(de)粘(zhan)接，也會(hui)(hui)再一(yi)(yi)次失(shi)去粘(zhan)接強度(du)。所以，熱熔(rong)膠(jiao)膜(mo)(mo)的(de)熔(rong)化溫(wen)(wen)(wen)度(du)，也就是接近它的(de)一(yi)(yi)個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)。超過這個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)，熱熔(rong)膠(jiao)膜(mo)(mo)就會(hui)(hui)失(shi)去粘(zhan)接。所以，通常情況下，高溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)的(de)耐(nai)溫(wen)(wen)(wen)性能(neng)也是比較(jiao)(jiao)高的(de)，相(xiang)反，低(di)溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)它的(de)耐(nai)高溫(wen)(wen)(wen)性能(neng)比較(jiao)(jiao)差。

值得一(yi)提(ti)的是，熔化溫(wen)度(du)(du)和實(shi)際的熱(re)熔膠膜(mo)使(shi)(shi)用溫(wen)度(du)(du)是不一(yi)樣的。熱(re)熔膠膜(mo)的實(shi)際使(shi)(shi)用溫(wen)度(du)(du)通常會比(bi)熔化溫(wen)度(du)(du)高(gao)幾十度(du)(du)。具體(ti)高(gao)多(duo)少還需要看熱(re)熔膠膜(mo)本(ben)身的熔指等(deng)其它特性，為的是使(shi)(shi)得熱(re)熔膠膜(mo)在更短的時間內可以熔化。

通過上面(mian)的(de)(de)說明(ming)，我們似(si)乎感覺到高(gao)溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)具(ju)有更(geng)(geng)好的(de)(de)性能優勢，能復合(he)要(yao)求(qiu)更(geng)(geng)高(gao)的(de)(de)場合(he)，但實(shi)際上并不(bu)是(shi)這樣(yang)。選擇高(gao)溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)還是(shi)低溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)是(shi)由(you)復合(he)的(de)(de)材料類型決定的(de)(de)。俗(su)話說，存(cun)在(zai)即(ji)合(he)理！高(gao)溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)、低溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)本就是(shi)為(wei)了滿足不(bu)同材料的(de)(de)復合(he)要(yao)求(qiu)而比研發推(tui)出的(de)(de)，不(bu)能單(dan)獨討論(lun)是(shi)高(gao)溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)好，還是(shi)低溫熱(re)(re)(re)熔(rong)(rong)膠膜(mo)更(geng)(geng)好。判(pan)定哪一種類型的(de)(de)熱(re)(re)(re)熔(rong)(rong)膠膜(mo)更(geng)(geng)好或者更(geng)(geng)合(he)適(shi)，需(xu)要(yao)根(gen)據具(ju)體(ti)的(de)(de)復合(he)要(yao)求(qiu)來測評、判(pan)斷(duan)。

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可(ke)以(yi)符合性能需求(qiu)。并且，使用低(di)溫熱熔膠(jiao)膜可(ke)以(yi)大大降(jiang)低(di)能耗，在性能達(da)到要求(qiu)的基礎(chu)上，盡量做到節能環保的，這才是我們所追(zhui)求(qiu)的。