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(gao)溫低溫的(de)區別(bie)(bie)，這主要是以熔(rong)點為(wei)依據來(lai)劃分的(de)。下面來(lai)介紹下熱熔(rong)膠(jiao)膜高(gao)溫與低溫的(de)區別(bie)(bie)。

1、高溫熱熔膠膜類型

高(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)主要(yao)是(shi)指熔(rong)(rong)(rong)點(dian)溫(wen)(wen)度(du)比較高(gao)的熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，其實高(gao)溫(wen)(wen)類(lei)型(xing)熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)只有(you)(you)高(gao)溫(wen)(wen)TPU熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，熔(rong)(rong)(rong)點(dian)溫(wen)(wen)度(du)在(zai)150℃，使(shi)用(yong)溫(wen)(wen)度(du)在(zai)180℃左(zuo)(zuo)右。還有(you)(you)一些中(zhong)高(gao)溫(wen)(wen)類(lei)型(xing)熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)，主要(yao)包括PA熱(re)(re)(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)度(du)150℃）、PES熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)溫(wen)(wen)度(du)115℃，使(shi)用(yong)溫(wen)(wen)度(du)140℃）和PO熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)在(zai)110℃，使(shi)用(yong)溫(wen)(wen)度(du)140℃左(zuo)(zuo)右）以及中(zhong)溫(wen)(wen)TPU熱(re)(re)(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)在(zai)110℃，使(shi)用(yong)溫(wen)(wen)度(du)在(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)(di)(di)(di)溫(wen)(wen)(wen)熱(re)(re)熔膠(jiao)(jiao)膜指的(de)(de)(de)(de)是熔點(dian)溫(wen)(wen)(wen)度低(di)(di)(di)(di)的(de)(de)(de)(de)熱(re)(re)熔膠(jiao)(jiao)膜，除了中高(gao)溫(wen)(wen)(wen)和高(gao)溫(wen)(wen)(wen)類型(xing)的(de)(de)(de)(de)，其他材質的(de)(de)(de)(de)都屬于低(di)(di)(di)(di)溫(wen)(wen)(wen)類型(xing)熱(re)(re)熔膠(jiao)(jiao)膜，主要(yao)包括低(di)(di)(di)(di)溫(wen)(wen)(wen)TPU熱(re)(re)熔膠(jiao)(jiao)膜和EVA熱(re)(re)熔膠(jiao)(jiao)膜。其中低(di)(di)(di)(di)溫(wen)(wen)(wen)TPU熱(re)(re)熔膠(jiao)(jiao)膜的(de)(de)(de)(de)熔點(dian)溫(wen)(wen)(wen)度在(zai)70℃，有的(de)(de)(de)(de)型(xing)號可(ke)低(di)(di)(di)(di)至五(wu)六十度；而EVA的(de)(de)(de)(de)熱(re)(re)熔膠(jiao)(jiao)膜熔點(dian)主要(yao)是在(zai)70攝氏度，低(di)(di)(di)(di)的(de)(de)(de)(de)型(xing)號可(ke)以(yi)達到四五(wu)十度，具有良好的(de)(de)(de)(de)耐低(di)(di)(di)(di)溫(wen)(wen)(wen)性(xing)能。

3、高溫與低溫熱熔膠膜的區別

兩者(zhe)最大的(de)(de)區(qu)別就是(shi)熔點不(bu)同，除了熔點的(de)(de)不(bu)同之外，在性能和使(shi)用(yong)范圍上也有所不(bu)同。低溫熱(re)熔膠(jiao)膜主(zhu)要(yao)是(shi)用(yong)在一(yi)些不(bu)耐高(gao)溫材質的(de)(de)材料復(fu)合中(zhong)，而高(gao)溫熱(re)熔膠(jiao)膜主(zhu)要(yao)應用(yong)在有耐高(gao)溫要(yao)求(qiu)的(de)(de)領域。整體來說的(de)(de)話，高(gao)溫熱(re)熔膠(jiao)膜的(de)(de)粘(zhan)接性能會更好(hao)一(yi)點，但是(shi)低溫熱(re)熔膠(jiao)膜可以更好(hao)地保護(hu)材料不(bu)受(shou)到熱(re)損傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)熔膠(jiao)膜(mo)的特點是(shi)需(xu)要加熱(re)熔化(hua)才具有(you)黏性(xing)，冷卻硬化(hua)后才具有(you)粘(zhan)接強度(du)(du)。高溫(wen)(wen)熱(re)熔膠(jiao)膜(mo)顧名思義，就(jiu)是(shi)需(xu)要加熱(re)的溫(wen)(wen)度(du)(du)高，相反(fan)，低溫(wen)(wen)熱(re)熔膠(jiao)膜(mo)也就(jiu)是(shi)在低溫(wen)(wen)條件下就(jiu)可以加熱(re)熔化(hua)了(le)。

因為熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)達(da)到一(yi)(yi)定溫(wen)度后就會(hui)熔(rong)(rong)(rong)化，熔(rong)(rong)(rong)化后，即使前期已經形成良好(hao)的(de)粘(zhan)接(jie)，也會(hui)再一(yi)(yi)次失去粘(zhan)接(jie)強度。所以，熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)的(de)熔(rong)(rong)(rong)化溫(wen)度，也就是接(jie)近它的(de)一(yi)(yi)個耐(nai)溫(wen)溫(wen)度。超過這(zhe)個耐(nai)溫(wen)溫(wen)度，熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)就會(hui)失去粘(zhan)接(jie)。所以，通常(chang)情(qing)況下，高溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)的(de)耐(nai)溫(wen)性能也是比較高的(de)，相反，低溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)它的(de)耐(nai)高溫(wen)性能比較差。

值(zhi)得(de)一(yi)(yi)提的是，熔(rong)化溫(wen)(wen)度(du)和實際的熱(re)熔(rong)膠膜(mo)(mo)使用溫(wen)(wen)度(du)是不(bu)一(yi)(yi)樣的。熱(re)熔(rong)膠膜(mo)(mo)的實際使用溫(wen)(wen)度(du)通(tong)常會比熔(rong)化溫(wen)(wen)度(du)高(gao)幾十度(du)。具體高(gao)多少還需要(yao)看熱(re)熔(rong)膠膜(mo)(mo)本身(shen)的熔(rong)指等其(qi)它(ta)特性(xing)，為的是使得(de)熱(re)熔(rong)膠膜(mo)(mo)在(zai)更(geng)短的時間內可以熔(rong)化。

通(tong)過上面(mian)的(de)(de)(de)(de)說(shuo)(shuo)明(ming)，我們(men)似(si)乎感覺到高(gao)(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)具有更(geng)好(hao)的(de)(de)(de)(de)性能優勢，能復合要(yao)求更(geng)高(gao)(gao)(gao)的(de)(de)(de)(de)場(chang)合，但實際上并不是(shi)這(zhe)樣。選擇高(gao)(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)還是(shi)低溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)是(shi)由復合的(de)(de)(de)(de)材料(liao)類型決定(ding)(ding)的(de)(de)(de)(de)。俗話說(shuo)(shuo)，存在即(ji)合理！高(gao)(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)、低溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)本就是(shi)為(wei)了滿足不同材料(liao)的(de)(de)(de)(de)復合要(yao)求而比(bi)研發推出(chu)的(de)(de)(de)(de)，不能單獨討論是(shi)高(gao)(gao)(gao)溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)好(hao)，還是(shi)低溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠膜(mo)更(geng)好(hao)。判(pan)定(ding)(ding)哪一種類型的(de)(de)(de)(de)熱(re)(re)熔(rong)(rong)膠膜(mo)更(geng)好(hao)或者更(geng)合適(shi)，需(xu)要(yao)根據具體的(de)(de)(de)(de)復合要(yao)求來測(ce)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)(ke)以符合性能(neng)需(xu)求(qiu)。并且，使用低溫熱熔膠膜可(ke)(ke)以大大降低能(neng)耗，在性能(neng)達到(dao)要求(qiu)的基礎上，盡量做到(dao)節能(neng)環(huan)保的，這才是我們所追求(qiu)的。