一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具(ju)有高溫低溫的(de)區別，這主(zhu)要(yao)是(shi)以熔(rong)點為依據來劃分的(de)。下(xia)面來介紹下(xia)熱(re)熔(rong)膠膜高溫與低溫的(de)區別。

1、高溫熱熔膠膜類型

高(gao)溫(wen)(wen)(wen)(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)主(zhu)要(yao)是指熔(rong)(rong)(rong)點(dian)溫(wen)(wen)(wen)(wen)度(du)(du)(du)比較高(gao)的熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，其實高(gao)溫(wen)(wen)(wen)(wen)類型(xing)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)只有高(gao)溫(wen)(wen)(wen)(wen)TPU熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，熔(rong)(rong)(rong)點(dian)溫(wen)(wen)(wen)(wen)度(du)(du)(du)在150℃，使(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)(du)在180℃左右。還有一(yi)些中高(gao)溫(wen)(wen)(wen)(wen)類型(xing)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，主(zhu)要(yao)包括PA熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)120℃，使(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)(du)150℃）、PES熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)溫(wen)(wen)(wen)(wen)度(du)(du)(du)115℃，使(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)(du)140℃）和(he)PO熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)在110℃，使(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)(du)140℃左右）以及中溫(wen)(wen)(wen)(wen)TPU熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)在110℃，使(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)(du)在140℃）。

2、低溫熱熔膠膜類型

低(di)(di)溫(wen)(wen)熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)指的(de)是(shi)熔(rong)(rong)(rong)(rong)(rong)點溫(wen)(wen)度(du)低(di)(di)的(de)熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)，除了中高溫(wen)(wen)和高溫(wen)(wen)類(lei)型(xing)的(de)，其(qi)他材質的(de)都屬于低(di)(di)溫(wen)(wen)類(lei)型(xing)熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)，主(zhu)要包(bao)括低(di)(di)溫(wen)(wen)TPU熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)和EVA熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)。其(qi)中低(di)(di)溫(wen)(wen)TPU熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)的(de)熔(rong)(rong)(rong)(rong)(rong)點溫(wen)(wen)度(du)在70℃，有的(de)型(xing)號可低(di)(di)至(zhi)五(wu)六(liu)十度(du)；而EVA的(de)熱(re)(re)熔(rong)(rong)(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)熔(rong)(rong)(rong)(rong)(rong)點主(zhu)要是(shi)在70攝氏度(du)，低(di)(di)的(de)型(xing)號可以(yi)達到四五(wu)十度(du)，具有良(liang)好(hao)的(de)耐低(di)(di)溫(wen)(wen)性能。

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(shi)熔(rong)點(dian)(dian)不(bu)(bu)同，除了熔(rong)點(dian)(dian)的(de)(de)不(bu)(bu)同之(zhi)外(wai)，在(zai)性能(neng)和使用范圍上也有所不(bu)(bu)同。低溫(wen)(wen)熱熔(rong)膠(jiao)膜(mo)主要(yao)是(shi)用在(zai)一些不(bu)(bu)耐(nai)高(gao)溫(wen)(wen)材(cai)(cai)質的(de)(de)材(cai)(cai)料復合中，而高(gao)溫(wen)(wen)熱熔(rong)膠(jiao)膜(mo)主要(yao)應用在(zai)有耐(nai)高(gao)溫(wen)(wen)要(yao)求的(de)(de)領域。整體來說的(de)(de)話，高(gao)溫(wen)(wen)熱熔(rong)膠(jiao)膜(mo)的(de)(de)粘接性能(neng)會更好(hao)一點(dian)(dian)，但是(shi)低溫(wen)(wen)熱熔(rong)膠(jiao)膜(mo)可(ke)以更好(hao)地保護材(cai)(cai)料不(bu)(bu)受到熱損傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)熔(rong)膠(jiao)膜的特(te)點是(shi)需要(yao)加(jia)(jia)(jia)熱(re)熔(rong)化才具有(you)(you)黏性(xing)，冷卻(que)硬化后才具有(you)(you)粘接強度。高溫熱(re)熔(rong)膠(jiao)膜顧(gu)名思義，就(jiu)是(shi)需要(yao)加(jia)(jia)(jia)熱(re)的溫度高，相反，低溫熱(re)熔(rong)膠(jiao)膜也就(jiu)是(shi)在低溫條件下就(jiu)可以(yi)加(jia)(jia)(jia)熱(re)熔(rong)化了(le)。

因為(wei)熱(re)熔(rong)膠(jiao)膜(mo)達到一(yi)定溫度后就會(hui)熔(rong)化(hua)，熔(rong)化(hua)后，即(ji)使前期已經形成良(liang)好的(de)(de)粘(zhan)接，也(ye)(ye)會(hui)再一(yi)次失(shi)去(qu)粘(zhan)接強度。所(suo)以，熱(re)熔(rong)膠(jiao)膜(mo)的(de)(de)熔(rong)化(hua)溫度，也(ye)(ye)就是(shi)接近它的(de)(de)一(yi)個耐溫溫度。超(chao)過這個耐溫溫度，熱(re)熔(rong)膠(jiao)膜(mo)就會(hui)失(shi)去(qu)粘(zhan)接。所(suo)以，通常(chang)情況下，高溫熱(re)熔(rong)膠(jiao)膜(mo)的(de)(de)耐溫性(xing)能也(ye)(ye)是(shi)比較(jiao)高的(de)(de)，相反，低溫熱(re)熔(rong)膠(jiao)膜(mo)它的(de)(de)耐高溫性(xing)能比較(jiao)差。

值得(de)一提的(de)是(shi)，熔(rong)化溫(wen)度(du)和實(shi)際(ji)的(de)熱熔(rong)膠(jiao)膜(mo)使用溫(wen)度(du)是(shi)不一樣的(de)。熱熔(rong)膠(jiao)膜(mo)的(de)實(shi)際(ji)使用溫(wen)度(du)通常會比熔(rong)化溫(wen)度(du)高(gao)幾十度(du)。具體高(gao)多少還需要看熱熔(rong)膠(jiao)膜(mo)本身的(de)熔(rong)指(zhi)等其它特性，為(wei)的(de)是(shi)使得(de)熱熔(rong)膠(jiao)膜(mo)在更短的(de)時間內可以熔(rong)化。

通過上面的(de)(de)(de)說明，我們似乎感覺到高(gao)溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)具有更(geng)好(hao)(hao)的(de)(de)(de)性(xing)能優勢，能復(fu)合(he)要求更(geng)高(gao)的(de)(de)(de)場合(he)，但實際上并(bing)不是這(zhe)樣。選擇高(gao)溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)還(huan)是低溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)是由(you)復(fu)合(he)的(de)(de)(de)材(cai)料類型(xing)決定(ding)的(de)(de)(de)。俗話說，存在即合(he)理(li)！高(gao)溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)、低溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)本就是為了滿足(zu)不同材(cai)料的(de)(de)(de)復(fu)合(he)要求而比研發推出(chu)的(de)(de)(de)，不能單獨討論是高(gao)溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)好(hao)(hao)，還(huan)是低溫(wen)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)更(geng)好(hao)(hao)。判定(ding)哪一(yi)種(zhong)類型(xing)的(de)(de)(de)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)更(geng)好(hao)(hao)或者更(geng)合(he)適，需(xu)要根(gen)據具體(ti)的(de)(de)(de)復(fu)合(he)要求來(lai)測評(ping)、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)可以符(fu)合(he)性能(neng)(neng)需求。并且，使用低溫熱熔膠(jiao)膜可以大大降(jiang)低能(neng)(neng)耗，在性能(neng)(neng)達到要求的基礎上，盡量做(zuo)到節能(neng)(neng)環(huan)保的，這才是我們所追求的。