一、低溫熱熔膠膜和高溫熱熔膠膜的區別

熱熔膠膜具有(you)高溫(wen)低(di)溫(wen)的區別，這主(zhu)要是以熔點為依據來(lai)(lai)劃(hua)分(fen)的。下面來(lai)(lai)介(jie)紹下熱熔膠膜高溫(wen)與低(di)溫(wen)的區別。

1、高溫熱熔膠膜類型

高溫熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)主要(yao)是(shi)指熔(rong)(rong)(rong)(rong)點(dian)溫度(du)(du)(du)比較高的熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，其(qi)實高溫類型熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)只有高溫TPU熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，熔(rong)(rong)(rong)(rong)點(dian)溫度(du)(du)(du)在(zai)150℃，使(shi)(shi)用(yong)溫度(du)(du)(du)在(zai)180℃左(zuo)右(you)。還(huan)有一(yi)些中(zhong)高溫類型熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)，主要(yao)包括PA熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)120℃，使(shi)(shi)用(yong)溫度(du)(du)(du)150℃）、PES熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)溫度(du)(du)(du)115℃，使(shi)(shi)用(yong)溫度(du)(du)(du)140℃）和PO熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)在(zai)110℃，使(shi)(shi)用(yong)溫度(du)(du)(du)140℃左(zuo)右(you)）以(yi)及(ji)中(zhong)溫TPU熱(re)(re)(re)(re)熔(rong)(rong)(rong)(rong)膠(jiao)膜(mo)(mo)(mo)（熔(rong)(rong)(rong)(rong)點(dian)在(zai)110℃，使(shi)(shi)用(yong)溫度(du)(du)(du)在(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)(di)溫(wen)熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)指的是熔(rong)點溫(wen)度(du)(du)(du)低(di)(di)的熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)，除了中高溫(wen)和(he)高溫(wen)類型的，其他材質的都屬于低(di)(di)溫(wen)類型熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)，主要包括低(di)(di)溫(wen)TPU熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)和(he)EVA熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)。其中低(di)(di)溫(wen)TPU熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)的熔(rong)點溫(wen)度(du)(du)(du)在70℃，有的型號可低(di)(di)至五六(liu)十度(du)(du)(du)；而EVA的熱(re)(re)(re)熔(rong)膠膜(mo)(mo)(mo)熔(rong)點主要是在70攝氏度(du)(du)(du)，低(di)(di)的型號可以達(da)到(dao)四(si)五十度(du)(du)(du)，具有良好的耐低(di)(di)溫(wen)性能。

3、高溫與低溫熱熔膠膜的區別

兩者最(zui)大的(de)區(qu)別(bie)就是熔(rong)(rong)點(dian)不(bu)同(tong)，除了熔(rong)(rong)點(dian)的(de)不(bu)同(tong)之外，在性能(neng)和使(shi)用范圍(wei)上也有(you)(you)所不(bu)同(tong)。低溫(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜主(zhu)要(yao)是用在一些不(bu)耐高(gao)溫(wen)材(cai)(cai)質的(de)材(cai)(cai)料復合中，而高(gao)溫(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜主(zhu)要(yao)應用在有(you)(you)耐高(gao)溫(wen)要(yao)求的(de)領域。整體來說的(de)話，高(gao)溫(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜的(de)粘接性能(neng)會更好一點(dian)，但是低溫(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜可以(yi)更好地保護材(cai)(cai)料不(bu)受到熱(re)(re)損(sun)傷。

二、熱熔膠膜高溫好還是低溫好

熱(re)熔(rong)膠膜(mo)的特點(dian)是需要(yao)加(jia)熱(re)熔(rong)化(hua)(hua)才具有黏性，冷卻硬化(hua)(hua)后才具有粘接強(qiang)度。高(gao)溫(wen)(wen)熱(re)熔(rong)膠膜(mo)顧名思義，就(jiu)是需要(yao)加(jia)熱(re)的溫(wen)(wen)度高(gao)，相反，低(di)溫(wen)(wen)熱(re)熔(rong)膠膜(mo)也就(jiu)是在低(di)溫(wen)(wen)條件(jian)下就(jiu)可(ke)以(yi)加(jia)熱(re)熔(rong)化(hua)(hua)了(le)。

因為熱熔(rong)膠(jiao)膜(mo)(mo)(mo)達到一(yi)定溫(wen)(wen)(wen)度(du)(du)后(hou)就會熔(rong)化，熔(rong)化后(hou)，即使前期已經形成良好的(de)(de)粘接(jie)，也(ye)(ye)會再一(yi)次失去(qu)粘接(jie)強度(du)(du)。所以(yi)，熱熔(rong)膠(jiao)膜(mo)(mo)(mo)的(de)(de)熔(rong)化溫(wen)(wen)(wen)度(du)(du)，也(ye)(ye)就是(shi)接(jie)近它的(de)(de)一(yi)個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)(du)。超過這(zhe)個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)(du)，熱熔(rong)膠(jiao)膜(mo)(mo)(mo)就會失去(qu)粘接(jie)。所以(yi)，通常情(qing)況下(xia)，高(gao)溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)(mo)的(de)(de)耐(nai)溫(wen)(wen)(wen)性能也(ye)(ye)是(shi)比(bi)(bi)較高(gao)的(de)(de)，相反，低(di)溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)(mo)它的(de)(de)耐(nai)高(gao)溫(wen)(wen)(wen)性能比(bi)(bi)較差。

值得一提的(de)是，熔(rong)(rong)化溫度和(he)實(shi)際的(de)熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)使(shi)(shi)用溫度是不一樣的(de)。熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)的(de)實(shi)際使(shi)(shi)用溫度通(tong)常會比熔(rong)(rong)化溫度高(gao)幾(ji)十度。具體高(gao)多(duo)少(shao)還需(xu)要(yao)看(kan)熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)本身的(de)熔(rong)(rong)指等(deng)其它特性，為的(de)是使(shi)(shi)得熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)在更短(duan)的(de)時間(jian)內可以熔(rong)(rong)化。

通過上面的(de)說(shuo)明，我們(men)似(si)乎(hu)感覺到高(gao)(gao)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)具有更好(hao)(hao)的(de)性能優勢，能復合(he)(he)(he)要(yao)求更高(gao)(gao)的(de)場(chang)合(he)(he)(he)，但(dan)實際上并(bing)不是這樣。選擇高(gao)(gao)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)還(huan)是低(di)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)是由(you)復合(he)(he)(he)的(de)材料類型(xing)決定(ding)的(de)。俗話說(shuo)，存在即合(he)(he)(he)理！高(gao)(gao)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)、低(di)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)本就是為了滿(man)足不同材料的(de)復合(he)(he)(he)要(yao)求而(er)比研(yan)發推出的(de)，不能單獨(du)討論是高(gao)(gao)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)好(hao)(hao)，還(huan)是低(di)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)更好(hao)(hao)。判定(ding)哪一(yi)種類型(xing)的(de)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)(jiao)膜(mo)更好(hao)(hao)或者(zhe)更合(he)(he)(he)適(shi)，需要(yao)根(gen)據(ju)具體(ti)的(de)復合(he)(he)(he)要(yao)求來測評、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(ke)以符(fu)合(he)性能(neng)(neng)需(xu)求(qiu)。并且(qie)，使(shi)用低溫熱熔膠膜可(ke)以大大降低能(neng)(neng)耗，在性能(neng)(neng)達到(dao)要求(qiu)的基(ji)礎(chu)上，盡(jin)量做到(dao)節能(neng)(neng)環保的，這才是我們所(suo)追求(qiu)的。