一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具有高溫低(di)(di)溫的(de)區別，這主要是以熔點(dian)為依據來劃分(fen)的(de)。下面來介紹下熱熔膠(jiao)膜高溫與低(di)(di)溫的(de)區別。

1、高溫熱熔膠膜類型

高(gao)(gao)(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)主要是指熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)度(du)比較(jiao)高(gao)(gao)(gao)的熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)，其實(shi)高(gao)(gao)(gao)溫(wen)(wen)類(lei)型熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)只有高(gao)(gao)(gao)溫(wen)(wen)TPU熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)，熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)度(du)在(zai)150℃，使(shi)用(yong)(yong)溫(wen)(wen)度(du)在(zai)180℃左右。還有一些中高(gao)(gao)(gao)溫(wen)(wen)類(lei)型熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)，主要包括PA熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)120℃，使(shi)用(yong)(yong)溫(wen)(wen)度(du)150℃）、PES熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)度(du)115℃，使(shi)用(yong)(yong)溫(wen)(wen)度(du)140℃）和(he)PO熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在(zai)110℃，使(shi)用(yong)(yong)溫(wen)(wen)度(du)140℃左右）以(yi)及(ji)中溫(wen)(wen)TPU熱(re)(re)(re)熔(rong)(rong)(rong)膠膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在(zai)110℃，使(shi)用(yong)(yong)溫(wen)(wen)度(du)在(zai)140℃）。

2、低溫熱熔膠膜類型

低溫(wen)(wen)(wen)(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)指的(de)(de)(de)是熔(rong)點溫(wen)(wen)(wen)(wen)(wen)度(du)低的(de)(de)(de)熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)，除(chu)了中(zhong)高溫(wen)(wen)(wen)(wen)(wen)和(he)高溫(wen)(wen)(wen)(wen)(wen)類型(xing)(xing)(xing)的(de)(de)(de)，其他材質的(de)(de)(de)都(dou)屬于低溫(wen)(wen)(wen)(wen)(wen)類型(xing)(xing)(xing)熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)，主(zhu)要(yao)(yao)包括低溫(wen)(wen)(wen)(wen)(wen)TPU熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)和(he)EVA熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)。其中(zhong)低溫(wen)(wen)(wen)(wen)(wen)TPU熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)的(de)(de)(de)熔(rong)點溫(wen)(wen)(wen)(wen)(wen)度(du)在70℃，有的(de)(de)(de)型(xing)(xing)(xing)號可低至五六十度(du)；而EVA的(de)(de)(de)熱(re)(re)(re)熔(rong)膠(jiao)(jiao)膜(mo)(mo)熔(rong)點主(zhu)要(yao)(yao)是在70攝氏度(du)，低的(de)(de)(de)型(xing)(xing)(xing)號可以達(da)到四五十度(du)，具有良好的(de)(de)(de)耐(nai)低溫(wen)(wen)(wen)(wen)(wen)性能。

3、高溫與低溫熱熔膠膜的區別

兩(liang)者最大(da)的(de)(de)區別就是(shi)(shi)熔點(dian)不(bu)(bu)(bu)同(tong)，除了熔點(dian)的(de)(de)不(bu)(bu)(bu)同(tong)之(zhi)外(wai)，在性能和使用(yong)范圍(wei)上也有所不(bu)(bu)(bu)同(tong)。低溫(wen)(wen)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)主(zhu)(zhu)要(yao)是(shi)(shi)用(yong)在一些不(bu)(bu)(bu)耐高溫(wen)(wen)材(cai)質的(de)(de)材(cai)料(liao)復合中，而高溫(wen)(wen)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)主(zhu)(zhu)要(yao)應用(yong)在有耐高溫(wen)(wen)要(yao)求的(de)(de)領域(yu)。整體來說的(de)(de)話，高溫(wen)(wen)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)的(de)(de)粘接性能會更好一點(dian)，但是(shi)(shi)低溫(wen)(wen)熱(re)(re)(re)熔膠(jiao)膜(mo)(mo)可以(yi)更好地(di)保護材(cai)料(liao)不(bu)(bu)(bu)受到熱(re)(re)(re)損傷(shang)。

二、熱熔膠膜高溫好還是低溫好

熱(re)(re)熔(rong)膠(jiao)膜的特點是需要加熱(re)(re)熔(rong)化才具有黏(nian)性(xing)，冷卻硬化后(hou)才具有粘(zhan)接強(qiang)度。高溫(wen)(wen)(wen)熱(re)(re)熔(rong)膠(jiao)膜顧名思義，就是需要加熱(re)(re)的溫(wen)(wen)(wen)度高，相反，低溫(wen)(wen)(wen)熱(re)(re)熔(rong)膠(jiao)膜也就是在低溫(wen)(wen)(wen)條件(jian)下就可以加熱(re)(re)熔(rong)化了。

因為熱(re)熔(rong)膠(jiao)(jiao)膜達到一定溫(wen)度(du)(du)后就(jiu)會熔(rong)化(hua)，熔(rong)化(hua)后，即使前期(qi)已經形成良好的(de)粘(zhan)(zhan)接，也會再一次失(shi)去粘(zhan)(zhan)接強度(du)(du)。所(suo)(suo)以(yi)(yi)，熱(re)熔(rong)膠(jiao)(jiao)膜的(de)熔(rong)化(hua)溫(wen)度(du)(du)，也就(jiu)是(shi)接近它(ta)的(de)一個耐溫(wen)溫(wen)度(du)(du)。超過這個耐溫(wen)溫(wen)度(du)(du)，熱(re)熔(rong)膠(jiao)(jiao)膜就(jiu)會失(shi)去粘(zhan)(zhan)接。所(suo)(suo)以(yi)(yi)，通常情況下，高(gao)溫(wen)熱(re)熔(rong)膠(jiao)(jiao)膜的(de)耐溫(wen)性(xing)(xing)能也是(shi)比較高(gao)的(de)，相反，低(di)溫(wen)熱(re)熔(rong)膠(jiao)(jiao)膜它(ta)的(de)耐高(gao)溫(wen)性(xing)(xing)能比較差。

值得(de)一(yi)提的是，熔(rong)(rong)(rong)(rong)化溫度和(he)實際的熱(re)熔(rong)(rong)(rong)(rong)膠膜(mo)使(shi)用(yong)溫度是不一(yi)樣的。熱(re)熔(rong)(rong)(rong)(rong)膠膜(mo)的實際使(shi)用(yong)溫度通常會比熔(rong)(rong)(rong)(rong)化溫度高(gao)幾十度。具體(ti)高(gao)多(duo)少還(huan)需要看熱(re)熔(rong)(rong)(rong)(rong)膠膜(mo)本身的熔(rong)(rong)(rong)(rong)指等其它特性，為的是使(shi)得(de)熱(re)熔(rong)(rong)(rong)(rong)膠膜(mo)在更短的時間內可以熔(rong)(rong)(rong)(rong)化。

通過上(shang)面的(de)(de)(de)(de)說明，我們似乎感覺到高(gao)溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)具有更好(hao)的(de)(de)(de)(de)性能優勢，能復合(he)(he)(he)(he)要(yao)(yao)求更高(gao)的(de)(de)(de)(de)場(chang)合(he)(he)(he)(he)，但實際上(shang)并不(bu)是(shi)這樣。選擇高(gao)溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)還是(shi)低溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)是(shi)由復合(he)(he)(he)(he)的(de)(de)(de)(de)材(cai)(cai)料類型(xing)決定(ding)的(de)(de)(de)(de)。俗話說，存(cun)在即合(he)(he)(he)(he)理！高(gao)溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)、低溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)本就是(shi)為了滿(man)足不(bu)同(tong)材(cai)(cai)料的(de)(de)(de)(de)復合(he)(he)(he)(he)要(yao)(yao)求而比研發推(tui)出(chu)的(de)(de)(de)(de)，不(bu)能單(dan)獨(du)討論是(shi)高(gao)溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)好(hao)，還是(shi)低溫熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)更好(hao)。判定(ding)哪一(yi)種類型(xing)的(de)(de)(de)(de)熱熔(rong)(rong)膠(jiao)膜(mo)(mo)(mo)(mo)更好(hao)或(huo)者更合(he)(he)(he)(he)適，需要(yao)(yao)根據(ju)具體的(de)(de)(de)(de)復合(he)(he)(he)(he)要(yao)(yao)求來(lai)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(yi)符合性能(neng)需求。并且，使用低溫熱熔膠(jiao)膜可以(yi)大(da)大(da)降低能(neng)耗(hao)，在性能(neng)達到(dao)要求的基礎上，盡(jin)量做到(dao)節能(neng)環保的，這才是(shi)我們所追求的。