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(di)溫的區別(bie)，這(zhe)主要(yao)是以熔(rong)點(dian)為(wei)依(yi)據來劃分的。下(xia)(xia)面來介紹下(xia)(xia)熱熔(rong)膠膜高(gao)溫與低(di)溫的區別(bie)。

1、高溫熱熔膠膜類型

高溫(wen)(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)主(zhu)要(yao)是(shi)指熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)度(du)(du)比較高的熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，其實高溫(wen)(wen)(wen)(wen)類(lei)型熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)只有(you)高溫(wen)(wen)(wen)(wen)TPU熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)度(du)(du)在(zai)150℃，使(shi)(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)在(zai)180℃左右(you)。還有(you)一些(xie)中高溫(wen)(wen)(wen)(wen)類(lei)型熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)，主(zhu)要(yao)包括PA熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)120℃，使(shi)(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)150℃）、PES熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)溫(wen)(wen)(wen)(wen)度(du)(du)115℃，使(shi)(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)140℃）和PO熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在(zai)110℃，使(shi)(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)140℃左右(you)）以及中溫(wen)(wen)(wen)(wen)TPU熱(re)(re)熔(rong)(rong)(rong)膠(jiao)膜(mo)(mo)（熔(rong)(rong)(rong)點(dian)(dian)在(zai)110℃，使(shi)(shi)用(yong)溫(wen)(wen)(wen)(wen)度(du)(du)在(zai)140℃）。

2、低溫熱熔膠膜類型

低(di)溫熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)指的(de)(de)(de)是熔(rong)(rong)(rong)(rong)點溫度(du)低(di)的(de)(de)(de)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)，除了中高溫和(he)高溫類(lei)型的(de)(de)(de)，其他材質的(de)(de)(de)都屬于低(di)溫類(lei)型熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)，主要包括(kuo)低(di)溫TPU熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)和(he)EVA熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)。其中低(di)溫TPU熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)的(de)(de)(de)熔(rong)(rong)(rong)(rong)點溫度(du)在70℃，有(you)的(de)(de)(de)型號(hao)可低(di)至五(wu)六十度(du)；而EVA的(de)(de)(de)熱(re)(re)(re)熔(rong)(rong)(rong)(rong)膠膜(mo)(mo)熔(rong)(rong)(rong)(rong)點主要是在70攝(she)氏度(du)，低(di)的(de)(de)(de)型號(hao)可以達到四五(wu)十度(du)，具有(you)良好的(de)(de)(de)耐低(di)溫性能。

3、高溫與低溫熱熔膠膜的區別

兩者(zhe)最大的(de)區別就(jiu)是(shi)熔點(dian)不同(tong)，除了(le)熔點(dian)的(de)不同(tong)之(zhi)外，在(zai)性(xing)能(neng)和使用范圍(wei)上也有(you)所不同(tong)。低(di)(di)溫(wen)熱熔膠(jiao)膜主要(yao)是(shi)用在(zai)一(yi)些不耐(nai)高(gao)(gao)溫(wen)材質的(de)材料(liao)復合中(zhong)，而高(gao)(gao)溫(wen)熱熔膠(jiao)膜主要(yao)應用在(zai)有(you)耐(nai)高(gao)(gao)溫(wen)要(yao)求的(de)領(ling)域。整體來說的(de)話，高(gao)(gao)溫(wen)熱熔膠(jiao)膜的(de)粘接性(xing)能(neng)會(hui)更(geng)(geng)好一(yi)點(dian)，但是(shi)低(di)(di)溫(wen)熱熔膠(jiao)膜可以更(geng)(geng)好地保護材料(liao)不受(shou)到熱損傷(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(shi)(shi)需(xu)(xu)要加熱(re)(re)熔(rong)化(hua)(hua)才具(ju)有(you)黏(nian)性，冷卻硬(ying)化(hua)(hua)后才具(ju)有(you)粘(zhan)接強度。高(gao)溫(wen)熱(re)(re)熔(rong)膠(jiao)膜顧名思義，就是(shi)(shi)需(xu)(xu)要加熱(re)(re)的溫(wen)度高(gao)，相反，低(di)(di)溫(wen)熱(re)(re)熔(rong)膠(jiao)膜也就是(shi)(shi)在低(di)(di)溫(wen)條件下就可以加熱(re)(re)熔(rong)化(hua)(hua)了。

因(yin)為熱熔(rong)膠(jiao)膜(mo)(mo)達到一定溫(wen)(wen)(wen)度(du)(du)(du)后就會(hui)熔(rong)化，熔(rong)化后，即使前期已經形(xing)成良(liang)好的粘接(jie)，也(ye)會(hui)再一次失(shi)去粘接(jie)強度(du)(du)(du)。所以，熱熔(rong)膠(jiao)膜(mo)(mo)的熔(rong)化溫(wen)(wen)(wen)度(du)(du)(du)，也(ye)就是接(jie)近它(ta)的一個耐(nai)(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)(du)(du)。超過這個耐(nai)(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)(du)(du)，熱熔(rong)膠(jiao)膜(mo)(mo)就會(hui)失(shi)去粘接(jie)。所以，通常情(qing)況下，高溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)的耐(nai)(nai)溫(wen)(wen)(wen)性(xing)能也(ye)是比(bi)較高的，相反，低(di)溫(wen)(wen)(wen)熱熔(rong)膠(jiao)膜(mo)(mo)它(ta)的耐(nai)(nai)高溫(wen)(wen)(wen)性(xing)能比(bi)較差。

值得一提的(de)(de)是，熔(rong)化溫(wen)度和(he)實際的(de)(de)熱熔(rong)膠膜(mo)使用(yong)溫(wen)度是不一樣的(de)(de)。熱熔(rong)膠膜(mo)的(de)(de)實際使用(yong)溫(wen)度通(tong)常會比熔(rong)化溫(wen)度高幾十度。具體高多少還需要看熱熔(rong)膠膜(mo)本身的(de)(de)熔(rong)指等其它(ta)特性，為的(de)(de)是使得熱熔(rong)膠膜(mo)在(zai)更短的(de)(de)時間內可以熔(rong)化。

通(tong)過上面的(de)(de)說明，我(wo)們似乎感覺到(dao)高(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)具(ju)有(you)更(geng)好(hao)的(de)(de)性(xing)能優勢，能復(fu)(fu)合(he)要求更(geng)高(gao)的(de)(de)場合(he)，但實際上并不是這樣。選擇高(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)還是低(di)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)是由(you)復(fu)(fu)合(he)的(de)(de)材(cai)料類(lei)型決定的(de)(de)。俗話(hua)說，存(cun)在即合(he)理！高(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)、低(di)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)本(ben)就是為了滿足不同材(cai)料的(de)(de)復(fu)(fu)合(he)要求而比研發推(tui)出的(de)(de)，不能單獨(du)討論是高(gao)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)好(hao)，還是低(di)溫(wen)(wen)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)更(geng)好(hao)。判(pan)定哪一種類(lei)型的(de)(de)熱(re)(re)(re)熔(rong)膠(jiao)膜(mo)(mo)更(geng)好(hao)或(huo)者更(geng)合(he)適(shi)，需(xu)要根(gen)據具(ju)體的(de)(de)復(fu)(fu)合(he)要求來測(ce)評(ping)、判(pan)斷(duan)。

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)以符合性(xing)能需求(qiu)。并且，使用低(di)溫熱熔膠膜可(ke)以大大降低(di)能耗，在性(xing)能達(da)到要求(qiu)的(de)基(ji)礎上，盡量(liang)做到節能環保的(de)，這才是我們所追求(qiu)的(de)。