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)低溫(wen)的(de)區別，這主要是以熔點為依據來劃分的(de)。下(xia)面來介紹下(xia)熱(re)熔膠膜高(gao)溫(wen)與低溫(wen)的(de)區別。

1、高溫熱熔膠膜類型

高(gao)(gao)溫(wen)(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)主(zhu)要(yao)是指熔(rong)(rong)點(dian)溫(wen)(wen)度(du)(du)比較高(gao)(gao)的熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，其實高(gao)(gao)溫(wen)(wen)類(lei)型熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)只有高(gao)(gao)溫(wen)(wen)TPU熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，熔(rong)(rong)點(dian)溫(wen)(wen)度(du)(du)在150℃，使用溫(wen)(wen)度(du)(du)在180℃左右(you)。還有一些(xie)中高(gao)(gao)溫(wen)(wen)類(lei)型熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，主(zhu)要(yao)包括PA熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)點(dian)120℃，使用溫(wen)(wen)度(du)(du)150℃）、PES熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)點(dian)溫(wen)(wen)度(du)(du)115℃，使用溫(wen)(wen)度(du)(du)140℃）和PO熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)點(dian)在110℃，使用溫(wen)(wen)度(du)(du)140℃左右(you)）以及(ji)中溫(wen)(wen)TPU熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)點(dian)在110℃，使用溫(wen)(wen)度(du)(du)在140℃）。

2、低溫熱熔膠膜類型

低溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)指的(de)(de)是熔(rong)點溫(wen)(wen)(wen)度(du)(du)低的(de)(de)熱熔(rong)膠(jiao)膜(mo)(mo)，除(chu)了(le)中高溫(wen)(wen)(wen)和高溫(wen)(wen)(wen)類型的(de)(de)，其(qi)他材(cai)質的(de)(de)都屬于低溫(wen)(wen)(wen)類型熱熔(rong)膠(jiao)膜(mo)(mo)，主要(yao)包括(kuo)低溫(wen)(wen)(wen)TPU熱熔(rong)膠(jiao)膜(mo)(mo)和EVA熱熔(rong)膠(jiao)膜(mo)(mo)。其(qi)中低溫(wen)(wen)(wen)TPU熱熔(rong)膠(jiao)膜(mo)(mo)的(de)(de)熔(rong)點溫(wen)(wen)(wen)度(du)(du)在70℃，有的(de)(de)型號(hao)可(ke)低至五(wu)六(liu)十度(du)(du)；而EVA的(de)(de)熱熔(rong)膠(jiao)膜(mo)(mo)熔(rong)點主要(yao)是在70攝氏度(du)(du)，低的(de)(de)型號(hao)可(ke)以達到(dao)四五(wu)十度(du)(du)，具有良(liang)好(hao)的(de)(de)耐低溫(wen)(wen)(wen)性能。

3、高溫與低溫熱熔膠膜的區別

兩者最大的區別就是(shi)熔點(dian)不(bu)同(tong)，除(chu)了(le)熔點(dian)的不(bu)同(tong)之外，在性能和使用(yong)范圍(wei)上(shang)也有所不(bu)同(tong)。低溫熱(re)(re)熔膠膜主(zhu)要是(shi)用(yong)在一些(xie)不(bu)耐(nai)高溫材(cai)(cai)質(zhi)的材(cai)(cai)料復(fu)合中，而高溫熱(re)(re)熔膠膜主(zhu)要應用(yong)在有耐(nai)高溫要求的領域。整體來說的話，高溫熱(re)(re)熔膠膜的粘接(jie)性能會更(geng)好一點(dian)，但是(shi)低溫熱(re)(re)熔膠膜可以更(geng)好地保(bao)護材(cai)(cai)料不(bu)受到熱(re)(re)損傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)(re)熔(rong)膠(jiao)膜的特點是(shi)需要(yao)加(jia)(jia)熱(re)(re)熔(rong)化(hua)才(cai)具有(you)黏性，冷卻硬化(hua)后才(cai)具有(you)粘(zhan)接強度(du)(du)。高溫熱(re)(re)熔(rong)膠(jiao)膜顧名(ming)思義，就(jiu)是(shi)需要(yao)加(jia)(jia)熱(re)(re)的溫度(du)(du)高，相反，低(di)溫熱(re)(re)熔(rong)膠(jiao)膜也(ye)就(jiu)是(shi)在低(di)溫條件下就(jiu)可以加(jia)(jia)熱(re)(re)熔(rong)化(hua)了(le)。

因為熱(re)熔(rong)(rong)膠(jiao)膜達到一定(ding)溫(wen)(wen)(wen)(wen)度(du)(du)后就(jiu)(jiu)會(hui)(hui)熔(rong)(rong)化(hua)，熔(rong)(rong)化(hua)后，即(ji)使前(qian)期(qi)已經(jing)形(xing)成良好的(de)粘接，也(ye)(ye)會(hui)(hui)再一次失去粘接強(qiang)度(du)(du)。所以，熱(re)熔(rong)(rong)膠(jiao)膜的(de)熔(rong)(rong)化(hua)溫(wen)(wen)(wen)(wen)度(du)(du)，也(ye)(ye)就(jiu)(jiu)是(shi)(shi)接近它的(de)一個耐溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du)(du)。超(chao)過這個耐溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du)(du)，熱(re)熔(rong)(rong)膠(jiao)膜就(jiu)(jiu)會(hui)(hui)失去粘接。所以，通常情況下(xia)，高(gao)(gao)溫(wen)(wen)(wen)(wen)熱(re)熔(rong)(rong)膠(jiao)膜的(de)耐溫(wen)(wen)(wen)(wen)性能也(ye)(ye)是(shi)(shi)比(bi)較高(gao)(gao)的(de)，相反，低溫(wen)(wen)(wen)(wen)熱(re)熔(rong)(rong)膠(jiao)膜它的(de)耐高(gao)(gao)溫(wen)(wen)(wen)(wen)性能比(bi)較差。

值得(de)一提的是，熔(rong)(rong)化溫(wen)度和實際(ji)的熱(re)熔(rong)(rong)膠(jiao)膜(mo)(mo)使用(yong)溫(wen)度是不一樣的。熱(re)熔(rong)(rong)膠(jiao)膜(mo)(mo)的實際(ji)使用(yong)溫(wen)度通常會比熔(rong)(rong)化溫(wen)度高幾十度。具體高多少還(huan)需要看熱(re)熔(rong)(rong)膠(jiao)膜(mo)(mo)本身的熔(rong)(rong)指等其它特性(xing)，為的是使得(de)熱(re)熔(rong)(rong)膠(jiao)膜(mo)(mo)在更(geng)短(duan)的時間內可以熔(rong)(rong)化。

通過上(shang)面(mian)的(de)說(shuo)(shuo)明(ming)，我們似乎感覺(jue)到高(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)具有(you)更(geng)好(hao)的(de)性能(neng)優勢，能(neng)復(fu)(fu)合(he)要求更(geng)高(gao)(gao)的(de)場(chang)合(he)，但實(shi)際上(shang)并不是(shi)這樣。選擇高(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)還是(shi)低溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)是(shi)由復(fu)(fu)合(he)的(de)材料類型決定的(de)。俗(su)話(hua)說(shuo)(shuo)，存在即合(he)理(li)！高(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)、低溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)本就是(shi)為了(le)滿足不同材料的(de)復(fu)(fu)合(he)要求而比(bi)研發推出(chu)的(de)，不能(neng)單(dan)獨討論是(shi)高(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)好(hao)，還是(shi)低溫(wen)(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)更(geng)好(hao)。判(pan)(pan)定哪一種類型的(de)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)更(geng)好(hao)或者(zhe)更(geng)合(he)適，需要根據(ju)具體的(de)復(fu)(fu)合(he)要求來測(ce)評、判(pan)(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以(yi)符合性能(neng)(neng)需求(qiu)。并且(qie)，使用低溫熱(re)熔膠(jiao)膜可以(yi)大大降低能(neng)(neng)耗，在性能(neng)(neng)達到要求(qiu)的(de)(de)基礎上，盡量做到節能(neng)(neng)環保的(de)(de)，這才是我們(men)所追求(qiu)的(de)(de)。