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)溫的區別,這主(zhu)要(yao)是以熔點(dian)為依(yi)據來劃分的。下面來介(jie)紹下熱熔膠膜高溫與(yu)低(di)溫的區別。
1、高溫熱熔膠膜類型
高(gao)溫(wen)熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)主(zhu)要(yao)是指熔(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)比(bi)較(jiao)高(gao)的熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo),其實高(gao)溫(wen)類(lei)型熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)只有高(gao)溫(wen)TPU熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo),熔(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)在150℃,使(shi)用(yong)溫(wen)度(du)(du)在180℃左右(you)。還有一(yi)些中高(gao)溫(wen)類(lei)型熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo),主(zhu)要(yao)包括PA熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(熔(rong)(rong)(rong)點(dian)120℃,使(shi)用(yong)溫(wen)度(du)(du)150℃)、PES熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(熔(rong)(rong)(rong)點(dian)溫(wen)度(du)(du)115℃,使(shi)用(yong)溫(wen)度(du)(du)140℃)和PO熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(熔(rong)(rong)(rong)點(dian)在110℃,使(shi)用(yong)溫(wen)度(du)(du)140℃左右(you))以及中溫(wen)TPU熱(re)熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(熔(rong)(rong)(rong)點(dian)在110℃,使(shi)用(yong)溫(wen)度(du)(du)在140℃)。
2、低溫熱熔膠膜類型
低(di)(di)溫熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)指的(de)是(shi)熔(rong)(rong)點(dian)(dian)溫度(du)低(di)(di)的(de)熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo),除了中高溫和高溫類(lei)型的(de),其(qi)他材質的(de)都屬于低(di)(di)溫類(lei)型熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo),主要(yao)包括低(di)(di)溫TPU熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)和EVA熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)。其(qi)中低(di)(di)溫TPU熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)的(de)熔(rong)(rong)點(dian)(dian)溫度(du)在70℃,有(you)的(de)型號(hao)可低(di)(di)至(zhi)五六十(shi)度(du);而EVA的(de)熱(re)熔(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)熔(rong)(rong)點(dian)(dian)主要(yao)是(shi)在70攝(she)氏度(du),低(di)(di)的(de)型號(hao)可以達(da)到四五十(shi)度(du),具有(you)良(liang)好的(de)耐低(di)(di)溫性(xing)能(neng)。
3、高溫與低溫熱熔膠膜的區別
兩者最大的區(qu)別就(jiu)是(shi)熔(rong)點不(bu)(bu)同,除了熔(rong)點的不(bu)(bu)同之外,在性能和使用(yong)范圍(wei)上(shang)也有所不(bu)(bu)同。低溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜主要是(shi)用(yong)在一(yi)些不(bu)(bu)耐(nai)高(gao)(gao)溫(wen)(wen)(wen)材(cai)質的材(cai)料復合中,而高(gao)(gao)溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜主要應用(yong)在有耐(nai)高(gao)(gao)溫(wen)(wen)(wen)要求的領域。整體來說(shuo)的話,高(gao)(gao)溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜的粘接性能會更好一(yi)點,但是(shi)低溫(wen)(wen)(wen)熱(re)熔(rong)膠(jiao)膜可以更好地保護(hu)材(cai)料不(bu)(bu)受到熱(re)損傷。
二、熱熔膠膜高溫好還是低溫好
熱熔膠膜的特點是(shi)需要(yao)加(jia)熱熔化才具(ju)有黏性(xing),冷卻硬化后才具(ju)有粘接強度。高(gao)溫(wen)熱熔膠膜顧名思義(yi),就是(shi)需要(yao)加(jia)熱的溫(wen)度高(gao),相反,低(di)溫(wen)熱熔膠膜也就是(shi)在低(di)溫(wen)條(tiao)件下就可以加(jia)熱熔化了。
因為熱熔膠膜(mo)(mo)達到一(yi)定(ding)溫(wen)度后(hou)(hou)就(jiu)(jiu)會熔化,熔化后(hou)(hou),即(ji)使前(qian)期已經形成(cheng)良好(hao)的粘(zhan)接,也(ye)會再一(yi)次失去粘(zhan)接強度。所(suo)以,熱熔膠膜(mo)(mo)的熔化溫(wen)度,也(ye)就(jiu)(jiu)是(shi)接近它的一(yi)個耐溫(wen)溫(wen)度。超過這個耐溫(wen)溫(wen)度,熱熔膠膜(mo)(mo)就(jiu)(jiu)會失去粘(zhan)接。所(suo)以,通常情況下,高(gao)溫(wen)熱熔膠膜(mo)(mo)的耐溫(wen)性能也(ye)是(shi)比較高(gao)的,相(xiang)反,低溫(wen)熱熔膠膜(mo)(mo)它的耐高(gao)溫(wen)性能比較差。
值得一提(ti)的(de)(de)是(shi),熔(rong)(rong)化溫(wen)度(du)和實際(ji)的(de)(de)熱(re)熔(rong)(rong)膠(jiao)膜使用溫(wen)度(du)是(shi)不一樣的(de)(de)。熱(re)熔(rong)(rong)膠(jiao)膜的(de)(de)實際(ji)使用溫(wen)度(du)通常會(hui)比熔(rong)(rong)化溫(wen)度(du)高(gao)(gao)幾十(shi)度(du)。具體高(gao)(gao)多(duo)少還需要(yao)看熱(re)熔(rong)(rong)膠(jiao)膜本(ben)身的(de)(de)熔(rong)(rong)指等其它特性,為的(de)(de)是(shi)使得熱(re)熔(rong)(rong)膠(jiao)膜在更短的(de)(de)時間內可以熔(rong)(rong)化。
通過(guo)上面的(de)(de)(de)(de)說明(ming),我們似乎感覺(jue)到高溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)具有更(geng)好(hao)(hao)的(de)(de)(de)(de)性能優勢,能復(fu)合(he)要(yao)求(qiu)更(geng)高的(de)(de)(de)(de)場合(he),但(dan)實際(ji)上并不是(shi)(shi)這樣。選擇高溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)還是(shi)(shi)低溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)是(shi)(shi)由(you)復(fu)合(he)的(de)(de)(de)(de)材料類型決定(ding)的(de)(de)(de)(de)。俗話說,存在即合(he)理!高溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)、低溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)本就是(shi)(shi)為了滿足不同材料的(de)(de)(de)(de)復(fu)合(he)要(yao)求(qiu)而比(bi)研(yan)發推出的(de)(de)(de)(de),不能單(dan)獨討論(lun)是(shi)(shi)高溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)好(hao)(hao),還是(shi)(shi)低溫(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)更(geng)好(hao)(hao)。判(pan)(pan)定(ding)哪(na)一種類型的(de)(de)(de)(de)熱(re)熔膠(jiao)(jiao)膜(mo)更(geng)好(hao)(hao)或(huo)者更(geng)合(he)適(shi),需要(yao)根據具體的(de)(de)(de)(de)復(fu)合(he)要(yao)求(qiu)來測評、判(pan)(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)以符合(he)性(xing)能(neng)需求(qiu)(qiu)(qiu)。并且,使(shi)用低溫熱熔膠膜可(ke)以大大降(jiang)低能(neng)耗,在性(xing)能(neng)達到要求(qiu)(qiu)(qiu)的基礎上,盡量做到節能(neng)環(huan)保的,這才(cai)是我們所(suo)追求(qiu)(qiu)(qiu)的。