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)(wen)低溫(wen)(wen)的區別，這(zhe)主(zhu)要是以熔(rong)點為(wei)依據(ju)來(lai)(lai)劃分的。下(xia)(xia)面來(lai)(lai)介紹下(xia)(xia)熱(re)熔(rong)膠膜(mo)高溫(wen)(wen)與低溫(wen)(wen)的區別。

1、高溫熱熔膠膜類型

高(gao)溫(wen)(wen)(wen)熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)主(zhu)要(yao)(yao)是指熔(rong)點(dian)(dian)溫(wen)(wen)(wen)度(du)比較高(gao)的(de)熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，其實高(gao)溫(wen)(wen)(wen)類型(xing)(xing)熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)只有高(gao)溫(wen)(wen)(wen)TPU熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，熔(rong)點(dian)(dian)溫(wen)(wen)(wen)度(du)在(zai)150℃，使用(yong)(yong)溫(wen)(wen)(wen)度(du)在(zai)180℃左右。還有一些中(zhong)高(gao)溫(wen)(wen)(wen)類型(xing)(xing)熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)，主(zhu)要(yao)(yao)包括(kuo)PA熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點(dian)(dian)120℃，使用(yong)(yong)溫(wen)(wen)(wen)度(du)150℃）、PES熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點(dian)(dian)溫(wen)(wen)(wen)度(du)115℃，使用(yong)(yong)溫(wen)(wen)(wen)度(du)140℃）和(he)PO熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點(dian)(dian)在(zai)110℃，使用(yong)(yong)溫(wen)(wen)(wen)度(du)140℃左右）以及中(zhong)溫(wen)(wen)(wen)TPU熱熔(rong)膠(jiao)(jiao)(jiao)膜(mo)(mo)(mo)（熔(rong)點(dian)(dian)在(zai)110℃，使用(yong)(yong)溫(wen)(wen)(wen)度(du)在(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)(di)(di)溫熱(re)熔膠(jiao)膜(mo)指的是(shi)熔點(dian)溫度(du)(du)(du)低(di)(di)(di)的熱(re)熔膠(jiao)膜(mo)，除(chu)了中(zhong)高溫和高溫類型的，其他材質的都屬于低(di)(di)(di)溫類型熱(re)熔膠(jiao)膜(mo)，主(zhu)要包括(kuo)低(di)(di)(di)溫TPU熱(re)熔膠(jiao)膜(mo)和EVA熱(re)熔膠(jiao)膜(mo)。其中(zhong)低(di)(di)(di)溫TPU熱(re)熔膠(jiao)膜(mo)的熔點(dian)溫度(du)(du)(du)在(zai)70℃，有的型號(hao)(hao)可低(di)(di)(di)至五(wu)六十度(du)(du)(du)；而EVA的熱(re)熔膠(jiao)膜(mo)熔點(dian)主(zhu)要是(shi)在(zai)70攝(she)氏度(du)(du)(du)，低(di)(di)(di)的型號(hao)(hao)可以達到四(si)五(wu)十度(du)(du)(du)，具有良好的耐(nai)低(di)(di)(di)溫性能。

3、高溫與低溫熱熔膠膜的區別

兩者最大的區(qu)別就是熔(rong)(rong)(rong)點不(bu)同(tong)，除了熔(rong)(rong)(rong)點的不(bu)同(tong)之外(wai)，在性能和使用范圍上(shang)也有所不(bu)同(tong)。低溫(wen)(wen)熱熔(rong)(rong)(rong)膠膜(mo)主(zhu)要(yao)是用在一些不(bu)耐高(gao)(gao)(gao)溫(wen)(wen)材(cai)質的材(cai)料復(fu)合(he)中，而高(gao)(gao)(gao)溫(wen)(wen)熱熔(rong)(rong)(rong)膠膜(mo)主(zhu)要(yao)應(ying)用在有耐高(gao)(gao)(gao)溫(wen)(wen)要(yao)求(qiu)的領(ling)域。整體來說的話，高(gao)(gao)(gao)溫(wen)(wen)熱熔(rong)(rong)(rong)膠膜(mo)的粘接性能會更(geng)好一點，但(dan)是低溫(wen)(wen)熱熔(rong)(rong)(rong)膠膜(mo)可以(yi)更(geng)好地保(bao)護材(cai)料不(bu)受到熱損(sun)傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)(re)熔(rong)膠(jiao)膜的(de)特點是需(xu)要加(jia)熱(re)(re)熔(rong)化(hua)才(cai)具(ju)有黏性，冷卻硬化(hua)后才(cai)具(ju)有粘接(jie)強(qiang)度。高(gao)溫(wen)熱(re)(re)熔(rong)膠(jiao)膜顧名思義(yi)，就是需(xu)要加(jia)熱(re)(re)的(de)溫(wen)度高(gao)，相反，低溫(wen)熱(re)(re)熔(rong)膠(jiao)膜也就是在低溫(wen)條件下就可以加(jia)熱(re)(re)熔(rong)化(hua)了。

因為熱(re)熔(rong)膠(jiao)膜(mo)達到(dao)一定(ding)溫(wen)(wen)(wen)度(du)后(hou)就會熔(rong)化，熔(rong)化后(hou)，即使前(qian)期已經形成良(liang)好(hao)的(de)粘接，也會再一次失去(qu)粘接強度(du)。所(suo)以，熱(re)熔(rong)膠(jiao)膜(mo)的(de)熔(rong)化溫(wen)(wen)(wen)度(du)，也就是接近它的(de)一個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)。超(chao)過(guo)這個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)，熱(re)熔(rong)膠(jiao)膜(mo)就會失去(qu)粘接。所(suo)以，通常(chang)情況下，高溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜(mo)的(de)耐(nai)溫(wen)(wen)(wen)性(xing)(xing)能也是比(bi)(bi)較高的(de)，相反，低溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜(mo)它的(de)耐(nai)高溫(wen)(wen)(wen)性(xing)(xing)能比(bi)(bi)較差。

值(zhi)得(de)一提的(de)(de)是(shi)(shi)，熔(rong)化(hua)(hua)溫度(du)(du)和實(shi)際的(de)(de)熱(re)熔(rong)膠(jiao)膜使用溫度(du)(du)是(shi)(shi)不一樣的(de)(de)。熱(re)熔(rong)膠(jiao)膜的(de)(de)實(shi)際使用溫度(du)(du)通常(chang)會比熔(rong)化(hua)(hua)溫度(du)(du)高(gao)幾十度(du)(du)。具體高(gao)多少還(huan)需要看熱(re)熔(rong)膠(jiao)膜本身的(de)(de)熔(rong)指等其它特性，為的(de)(de)是(shi)(shi)使得(de)熱(re)熔(rong)膠(jiao)膜在更(geng)短的(de)(de)時間內(nei)可以熔(rong)化(hua)(hua)。

通(tong)過上(shang)面(mian)的(de)(de)說明，我們(men)似乎感覺到高(gao)溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)具(ju)有更(geng)好(hao)的(de)(de)性能優勢(shi)，能復(fu)(fu)合要(yao)求(qiu)更(geng)高(gao)的(de)(de)場合，但實際(ji)上(shang)并不是(shi)(shi)這樣(yang)。選擇(ze)高(gao)溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)還是(shi)(shi)低溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)是(shi)(shi)由(you)復(fu)(fu)合的(de)(de)材料類型決定的(de)(de)。俗話說，存在即(ji)合理(li)！高(gao)溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)、低溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)本就是(shi)(shi)為(wei)了滿足不同材料的(de)(de)復(fu)(fu)合要(yao)求(qiu)而比研發推(tui)出的(de)(de)，不能單(dan)獨討論是(shi)(shi)高(gao)溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)好(hao)，還是(shi)(shi)低溫(wen)(wen)(wen)熱熔(rong)(rong)膠膜(mo)更(geng)好(hao)。判定哪一種類型的(de)(de)熱熔(rong)(rong)膠膜(mo)更(geng)好(hao)或者更(geng)合適，需(xu)要(yao)根(gen)據具(ju)體的(de)(de)復(fu)(fu)合要(yao)求(qiu)來測評、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可以符合性能需求(qiu)(qiu)。并且，使用低溫熱(re)熔膠膜可以大大降(jiang)低能耗，在性能達(da)到(dao)要求(qiu)(qiu)的(de)基礎上(shang)，盡(jin)量做到(dao)節能環保的(de)，這才是(shi)我們所(suo)追求(qiu)(qiu)的(de)。