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)低(di)溫(wen)的區別,這主要是以(yi)熔點為依據來(lai)(lai)劃分的。下面來(lai)(lai)介紹下熱(re)熔膠(jiao)膜高溫(wen)與低(di)溫(wen)的區別。
1、高溫熱熔膠膜類型
高(gao)溫(wen)(wen)(wen)熱(re)熔膠(jiao)(jiao)膜(mo)(mo)主要是指(zhi)熔點溫(wen)(wen)(wen)度(du)(du)比較高(gao)的熱(re)熔膠(jiao)(jiao)膜(mo)(mo),其實高(gao)溫(wen)(wen)(wen)類型熱(re)熔膠(jiao)(jiao)膜(mo)(mo)只有(you)高(gao)溫(wen)(wen)(wen)TPU熱(re)熔膠(jiao)(jiao)膜(mo)(mo),熔點溫(wen)(wen)(wen)度(du)(du)在(zai)(zai)150℃,使用(yong)(yong)溫(wen)(wen)(wen)度(du)(du)在(zai)(zai)180℃左(zuo)右(you)。還(huan)有(you)一些中高(gao)溫(wen)(wen)(wen)類型熱(re)熔膠(jiao)(jiao)膜(mo)(mo),主要包括(kuo)PA熱(re)熔膠(jiao)(jiao)膜(mo)(mo)(熔點120℃,使用(yong)(yong)溫(wen)(wen)(wen)度(du)(du)150℃)、PES熱(re)熔膠(jiao)(jiao)膜(mo)(mo)(熔點溫(wen)(wen)(wen)度(du)(du)115℃,使用(yong)(yong)溫(wen)(wen)(wen)度(du)(du)140℃)和PO熱(re)熔膠(jiao)(jiao)膜(mo)(mo)(熔點在(zai)(zai)110℃,使用(yong)(yong)溫(wen)(wen)(wen)度(du)(du)140℃左(zuo)右(you))以及中溫(wen)(wen)(wen)TPU熱(re)熔膠(jiao)(jiao)膜(mo)(mo)(熔點在(zai)(zai)110℃,使用(yong)(yong)溫(wen)(wen)(wen)度(du)(du)在(zai)(zai)140℃)。
2、低溫熱熔膠膜類型
低(di)(di)溫(wen)(wen)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo)指的(de)是熔(rong)(rong)(rong)點溫(wen)(wen)度(du)低(di)(di)的(de)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo),除了中高溫(wen)(wen)和高溫(wen)(wen)類型(xing)(xing)的(de),其(qi)他材質的(de)都屬于(yu)低(di)(di)溫(wen)(wen)類型(xing)(xing)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo),主(zhu)要包括(kuo)低(di)(di)溫(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo)和EVA熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo)。其(qi)中低(di)(di)溫(wen)(wen)TPU熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo)的(de)熔(rong)(rong)(rong)點溫(wen)(wen)度(du)在70℃,有(you)的(de)型(xing)(xing)號可(ke)低(di)(di)至五(wu)六(liu)十度(du);而EVA的(de)熱熔(rong)(rong)(rong)膠(jiao)(jiao)膜(mo)(mo)(mo)(mo)熔(rong)(rong)(rong)點主(zhu)要是在70攝氏度(du),低(di)(di)的(de)型(xing)(xing)號可(ke)以(yi)達到四五(wu)十度(du),具(ju)有(you)良(liang)好的(de)耐低(di)(di)溫(wen)(wen)性能。
3、高溫與低溫熱熔膠膜的區別
兩者最(zui)大(da)的(de)(de)區別(bie)就是(shi)熔(rong)點(dian)不同,除了熔(rong)點(dian)的(de)(de)不同之外,在性能和使(shi)用(yong)范(fan)圍上也有所不同。低(di)溫(wen)(wen)(wen)(wen)熱(re)(re)(re)熔(rong)膠膜(mo)(mo)主(zhu)要是(shi)用(yong)在一些不耐(nai)高溫(wen)(wen)(wen)(wen)材(cai)質(zhi)的(de)(de)材(cai)料復合中,而高溫(wen)(wen)(wen)(wen)熱(re)(re)(re)熔(rong)膠膜(mo)(mo)主(zhu)要應用(yong)在有耐(nai)高溫(wen)(wen)(wen)(wen)要求的(de)(de)領(ling)域。整(zheng)體來說的(de)(de)話,高溫(wen)(wen)(wen)(wen)熱(re)(re)(re)熔(rong)膠膜(mo)(mo)的(de)(de)粘接性能會更好一點(dian),但是(shi)低(di)溫(wen)(wen)(wen)(wen)熱(re)(re)(re)熔(rong)膠膜(mo)(mo)可以更好地(di)保護材(cai)料不受到熱(re)(re)(re)損傷。
二、熱熔膠膜高溫好還是低溫好
熱(re)熔膠(jiao)膜的特點(dian)是需要加熱(re)熔化才(cai)(cai)具有黏性,冷卻(que)硬化后才(cai)(cai)具有粘接(jie)強(qiang)度(du)。高溫(wen)熱(re)熔膠(jiao)膜顧名(ming)思義,就(jiu)是需要加熱(re)的溫(wen)度(du)高,相反,低溫(wen)熱(re)熔膠(jiao)膜也就(jiu)是在低溫(wen)條件下就(jiu)可以(yi)加熱(re)熔化了。
因為熱(re)(re)熔(rong)(rong)膠(jiao)膜(mo)達到一定(ding)溫(wen)(wen)(wen)度(du)后(hou)就(jiu)(jiu)會熔(rong)(rong)化(hua),熔(rong)(rong)化(hua)后(hou),即使(shi)前期已經形成良好的粘接,也會再一次(ci)失去(qu)粘接強度(du)。所以(yi),熱(re)(re)熔(rong)(rong)膠(jiao)膜(mo)的熔(rong)(rong)化(hua)溫(wen)(wen)(wen)度(du),也就(jiu)(jiu)是(shi)(shi)接近(jin)它(ta)的一個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du)。超過這個耐(nai)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度(du),熱(re)(re)熔(rong)(rong)膠(jiao)膜(mo)就(jiu)(jiu)會失去(qu)粘接。所以(yi),通常情(qing)況(kuang)下,高溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜(mo)的耐(nai)溫(wen)(wen)(wen)性能也是(shi)(shi)比較(jiao)高的,相反(fan),低溫(wen)(wen)(wen)熱(re)(re)熔(rong)(rong)膠(jiao)膜(mo)它(ta)的耐(nai)高溫(wen)(wen)(wen)性能比較(jiao)差。
值得一(yi)提(ti)的(de)(de)是,熔(rong)化(hua)溫度(du)(du)和實際的(de)(de)熱熔(rong)膠(jiao)膜(mo)使(shi)用溫度(du)(du)是不一(yi)樣的(de)(de)。熱熔(rong)膠(jiao)膜(mo)的(de)(de)實際使(shi)用溫度(du)(du)通常會比熔(rong)化(hua)溫度(du)(du)高幾十度(du)(du)。具體高多少還需要看熱熔(rong)膠(jiao)膜(mo)本身的(de)(de)熔(rong)指(zhi)等其它特性(xing),為的(de)(de)是使(shi)得熱熔(rong)膠(jiao)膜(mo)在(zai)更短的(de)(de)時間內可以熔(rong)化(hua)。
通(tong)過(guo)上(shang)面的(de)說明,我們似乎感(gan)覺到高(gao)(gao)(gao)(gao)溫(wen)熱(re)熔膠(jiao)(jiao)膜具(ju)有更(geng)(geng)好(hao)(hao)的(de)性(xing)能(neng)優勢,能(neng)復合(he)要(yao)求(qiu)更(geng)(geng)高(gao)(gao)(gao)(gao)的(de)場合(he),但(dan)實(shi)際上(shang)并不是(shi)(shi)(shi)這樣。選擇高(gao)(gao)(gao)(gao)溫(wen)熱(re)熔膠(jiao)(jiao)膜還是(shi)(shi)(shi)低(di)溫(wen)熱(re)熔膠(jiao)(jiao)膜是(shi)(shi)(shi)由(you)復合(he)的(de)材料(liao)類型決定的(de)。俗話說,存(cun)在即合(he)理(li)!高(gao)(gao)(gao)(gao)溫(wen)熱(re)熔膠(jiao)(jiao)膜、低(di)溫(wen)熱(re)熔膠(jiao)(jiao)膜本就是(shi)(shi)(shi)為了滿(man)足不同(tong)材料(liao)的(de)復合(he)要(yao)求(qiu)而比研發推出的(de),不能(neng)單(dan)獨(du)討(tao)論是(shi)(shi)(shi)高(gao)(gao)(gao)(gao)溫(wen)熱(re)熔膠(jiao)(jiao)膜好(hao)(hao),還是(shi)(shi)(shi)低(di)溫(wen)熱(re)熔膠(jiao)(jiao)膜更(geng)(geng)好(hao)(hao)。判定哪一種類型的(de)熱(re)熔膠(jiao)(jiao)膜更(geng)(geng)好(hao)(hao)或者(zhe)更(geng)(geng)合(he)適,需要(yao)根據具(ju)體的(de)復合(he)要(yao)求(qiu)來測(ce)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)以符合(he)性能(neng)需求(qiu)。并且(qie),使用(yong)低溫熱熔膠膜可(ke)以大(da)大(da)降低能(neng)耗,在性能(neng)達到要求(qiu)的基礎上,盡量(liang)做到節能(neng)環保(bao)的,這才是(shi)我們(men)所追(zhui)求(qiu)的。