一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具有高溫(wen)低(di)溫(wen)的(de)區別，這(zhe)主(zhu)要是以熔點(dian)為依據來劃分的(de)。下面來介紹下熱熔膠膜高溫(wen)與(yu)低(di)溫(wen)的(de)區別。

1、高溫熱熔膠膜類型

高溫(wen)熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)主要是指熔(rong)(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)比(bi)較高的熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)，其實高溫(wen)類型熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)只(zhi)有高溫(wen)TPU熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)，熔(rong)(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)在(zai)(zai)(zai)(zai)150℃，使用(yong)溫(wen)度(du)(du)在(zai)(zai)(zai)(zai)180℃左右。還有一(yi)些中(zhong)高溫(wen)類型熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)，主要包括PA熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)120℃，使用(yong)溫(wen)度(du)(du)150℃）、PES熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)115℃，使用(yong)溫(wen)度(du)(du)140℃）和PO熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)在(zai)(zai)(zai)(zai)110℃，使用(yong)溫(wen)度(du)(du)140℃左右）以及中(zhong)溫(wen)TPU熱(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)在(zai)(zai)(zai)(zai)110℃，使用(yong)溫(wen)度(du)(du)在(zai)(zai)(zai)(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)(di)(di)溫熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)指的(de)(de)(de)是(shi)熔點(dian)溫度(du)低(di)(di)(di)的(de)(de)(de)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)，除了中(zhong)高溫和高溫類(lei)型(xing)的(de)(de)(de)，其他材質的(de)(de)(de)都(dou)屬于低(di)(di)(di)溫類(lei)型(xing)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)，主(zhu)要包括低(di)(di)(di)溫TPU熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)和EVA熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)。其中(zhong)低(di)(di)(di)溫TPU熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)的(de)(de)(de)熔點(dian)溫度(du)在70℃，有(you)(you)的(de)(de)(de)型(xing)號可低(di)(di)(di)至五六(liu)十(shi)度(du)；而EVA的(de)(de)(de)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)熔點(dian)主(zhu)要是(shi)在70攝氏度(du)，低(di)(di)(di)的(de)(de)(de)型(xing)號可以達(da)到四五十(shi)度(du)，具有(you)(you)良好的(de)(de)(de)耐低(di)(di)(di)溫性(xing)能(neng)。

3、高溫與低溫熱熔膠膜的區別

兩者最大的區別(bie)就是熔點(dian)不(bu)同，除了熔點(dian)的不(bu)同之外，在(zai)(zai)性能和使用范圍上也(ye)有所不(bu)同。低(di)溫(wen)熱(re)熔膠(jiao)膜(mo)主要是用在(zai)(zai)一些不(bu)耐高(gao)(gao)溫(wen)材(cai)(cai)質的材(cai)(cai)料復合中，而(er)高(gao)(gao)溫(wen)熱(re)熔膠(jiao)膜(mo)主要應用在(zai)(zai)有耐高(gao)(gao)溫(wen)要求(qiu)的領域。整(zheng)體(ti)來說的話，高(gao)(gao)溫(wen)熱(re)熔膠(jiao)膜(mo)的粘接性能會更好一點(dian)，但是低(di)溫(wen)熱(re)熔膠(jiao)膜(mo)可以更好地(di)保(bao)護材(cai)(cai)料不(bu)受到熱(re)損傷(shang)。

二、熱熔膠膜高溫好還是低溫好

熱(re)(re)熔膠膜(mo)的(de)特點是需要加熱(re)(re)熔化(hua)(hua)(hua)才具有(you)黏性，冷卻硬化(hua)(hua)(hua)后才具有(you)粘接強度。高溫(wen)(wen)熱(re)(re)熔膠膜(mo)顧名思(si)義，就(jiu)是需要加熱(re)(re)的(de)溫(wen)(wen)度高，相(xiang)反，低溫(wen)(wen)熱(re)(re)熔膠膜(mo)也就(jiu)是在低溫(wen)(wen)條件下(xia)就(jiu)可以加熱(re)(re)熔化(hua)(hua)(hua)了。

因為熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)達到一(yi)定溫(wen)度后就(jiu)會熔(rong)化(hua)，熔(rong)化(hua)后，即使前期已(yi)經(jing)形(xing)成良好的(de)(de)粘(zhan)接，也(ye)會再一(yi)次失去粘(zhan)接強度。所(suo)以(yi)，熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)的(de)(de)熔(rong)化(hua)溫(wen)度，也(ye)就(jiu)是接近它的(de)(de)一(yi)個(ge)耐溫(wen)溫(wen)度。超過這個(ge)耐溫(wen)溫(wen)度，熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)就(jiu)會失去粘(zhan)接。所(suo)以(yi)，通(tong)常情況(kuang)下(xia)，高(gao)溫(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)的(de)(de)耐溫(wen)性能也(ye)是比(bi)較高(gao)的(de)(de)，相(xiang)反，低溫(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)它的(de)(de)耐高(gao)溫(wen)性能比(bi)較差。

值得一提的(de)是，熔(rong)(rong)(rong)化溫度(du)和實(shi)際的(de)熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)使用(yong)(yong)溫度(du)是不一樣(yang)的(de)。熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)的(de)實(shi)際使用(yong)(yong)溫度(du)通(tong)常會比熔(rong)(rong)(rong)化溫度(du)高(gao)幾十度(du)。具體(ti)高(gao)多少還需(xu)要(yao)看熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)本身的(de)熔(rong)(rong)(rong)指等(deng)其它特性，為的(de)是使得熱熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)在更短的(de)時間內可以(yi)熔(rong)(rong)(rong)化。

通過(guo)上面(mian)的(de)說明，我們似(si)乎感覺到高(gao)溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)具有更(geng)好(hao)的(de)性能(neng)優勢，能(neng)復(fu)(fu)合(he)要(yao)(yao)(yao)求更(geng)高(gao)的(de)場合(he)，但實際上并不(bu)(bu)是(shi)(shi)(shi)這樣。選擇高(gao)溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)還(huan)是(shi)(shi)(shi)低溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)是(shi)(shi)(shi)由復(fu)(fu)合(he)的(de)材(cai)料(liao)類(lei)型決定的(de)。俗話(hua)說，存在即合(he)理！高(gao)溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)、低溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)本就是(shi)(shi)(shi)為了滿足不(bu)(bu)同材(cai)料(liao)的(de)復(fu)(fu)合(he)要(yao)(yao)(yao)求而比研發推(tui)出的(de)，不(bu)(bu)能(neng)單獨討論是(shi)(shi)(shi)高(gao)溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)好(hao)，還(huan)是(shi)(shi)(shi)低溫熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)更(geng)好(hao)。判(pan)定哪(na)一種類(lei)型的(de)熱(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)(jiao)膜(mo)更(geng)好(hao)或者更(geng)合(he)適，需要(yao)(yao)(yao)根據具體的(de)復(fu)(fu)合(he)要(yao)(yao)(yao)求來(lai)測評、判(pan)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可(ke)以符(fu)合性能需求。并(bing)且，使用低(di)溫熱熔膠膜可(ke)以大大降(jiang)低(di)能耗，在(zai)性能達到(dao)要求的(de)基礎(chu)上，盡量(liang)做到(dao)節能環保的(de)，這才是(shi)我們所追求的(de)。