中(zhong)空(kong)玻(bo)璃(li)(li)是(shi)目前(qian)已(yi)普遍應(ying)用(yong)于(yu)商(shang)(shang)業(ye)寫字樓、大型商(shang)(shang)場、高層住宅等建筑物的一種節(jie)能(neng)玻(bo)璃(li)(li)，具(ju)有(you)優良的隔(ge)(ge)熱、隔(ge)(ge)音(yin)性(xing)能(neng)且(qie)美觀實用(yong)。中(zhong)空(kong)玻(bo)璃(li)(li)是(shi)由兩(liang)(liang)片（或以上(shang)）玻(bo)璃(li)(li)與(yu)(yu)間(jian)隔(ge)(ge)條(tiao)粘(zhan)結(jie)(jie)而成，密(mi)封類型主要(yao)采(cai)用(yong)膠條(tiao)法和膠接法兩(liang)(liang)種，而目前(qian)采(cai)用(yong).多(duo)的是(shi)膠接法密(mi)封結(jie)(jie)構(gou)中(zhong)的雙道(dao)(dao)密(mi)封結(jie)(jie)構(gou)，其結(jie)(jie)構(gou)形式如圖1所示(shi)：兩(liang)(liang)片玻(bo)璃(li)(li)由間(jian)隔(ge)(ge)條(tiao)隔(ge)(ge)開(kai)，間(jian)隔(ge)(ge)條(tiao)與(yu)(yu)玻(bo)璃(li)(li)之間(jian)用(yong)丁基(ji)膠進(jin)行..道(dao)(dao)密(mi)封，在間(jian)隔(ge)(ge)條(tiao)內部填充(chong)分(fen)子(zi)篩(shai)，玻(bo)璃(li)(li)邊(bian)緣與(yu)(yu)間(jian)隔(ge)(ge)條(tiao)外側形成的縫隙用(yong)二(er)道(dao)(dao)密(mi)封膠進(jin)行密(mi)封。中(zhong)空(kong)玻(bo)璃(li)(li)膠廠家為你介紹(shao)！

一道(dao)密(mi)封(feng)(feng)膠(jiao)所起(qi)的(de)作用是阻止水氣或(huo)惰(duo)性氣體(ti)進出空腔，一般使用丁(ding)基膠(jiao)，因為丁(ding)基膠(jiao)的(de)水氣透過率(lv)(lv)和惰(duo)性氣體(ti)透過率(lv)(lv)都非常低(di)。但是丁(ding)基膠(jiao)本身粘結(jie)(jie)強度低(di)，彈性小，必須靠(kao)二道(dao)密(mi)封(feng)(feng)膠(jiao)對(dui)整體(ti)結(jie)(jie)構(gou)進行固定，將玻璃板塊(kuai)與間(jian)隔條粘結(jie)(jie)在一起(qi)，使中空玻璃在承受荷(he)載時，一道(dao)密(mi)封(feng)(feng)膠(jiao)能保持良好的(de)密(mi)封(feng)(feng)效果，同(tong)時整體(ti)結(jie)(jie)構(gou)不受影響。

中空玻璃二道密封膠的類型

中空玻璃(li)二道密封膠主要有(you)聚硫、聚氨酯(zhi)和硅酮(tong)三類，目前國內市場上以聚硫和硅酮(tong)為(wei)主，聚氨酯(zhi)類在(zai)國內出現較(jiao)晚，應(ying)用(yong)較(jiao)少。表1列(lie)出了(le)三種膠完全固化后(hou)的一些特性。

聚(ju)(ju)硫密封(feng)膠的優點是(shi)(shi)(shi)常溫下水氣(qi)和氬氣(qi)透(tou)過(guo)率(lv)較(jiao)(jiao)(jiao)(jiao)低；缺點是(shi)(shi)(shi)吸(xi)水率(lv)較(jiao)(jiao)(jiao)(jiao)高，模量、彈性恢(hui)復(fu)率(lv)隨溫度(du)升高下降較(jiao)(jiao)(jiao)(jiao)大，溫度(du)較(jiao)(jiao)(jiao)(jiao)高時水氣(qi)透(tou)過(guo)率(lv)也較(jiao)(jiao)(jiao)(jiao)大，另外(wai)由于其(qi)耐紫(zi)外(wai)老(lao)化性能較(jiao)(jiao)(jiao)(jiao)差，長期紫(zi)外(wai)線照射會有(you)不粘脫膠現象(xiang)。聚(ju)(ju)氨酯(zhi)密封(feng)膠的優點是(shi)(shi)(shi)水氣(qi)和氬氣(qi)透(tou)過(guo)率(lv)較(jiao)(jiao)(jiao)(jiao)低，而且(qie)溫度(du)較(jiao)(jiao)(jiao)(jiao)高時水氣(qi)透(tou)過(guo)率(lv)也相對較(jiao)(jiao)(jiao)(jiao)低；缺點是(shi)(shi)(shi)耐紫(zi)外(wai)老(lao)化性能較(jiao)(jiao)(jiao)(jiao)差。

硅(gui)酮(tong)(tong)密(mi)(mi)封(feng)膠(jiao)(jiao)是指以聚硅(gui)氧(yang)烷為主要原料的(de)(de)一種密(mi)(mi)封(feng)膠(jiao)(jiao)，也叫有機硅(gui)密(mi)(mi)封(feng)膠(jiao)(jiao)。硅(gui)酮(tong)(tong)密(mi)(mi)封(feng)膠(jiao)(jiao)的(de)(de)高分子鏈主要由Si—O—Si組成(cheng)，在(zai)固化過程中交聯行成(cheng)網狀的(de)(de)Si—O—Si骨架結構(gou)。Si—O鍵鍵能（444KJ/mol)很高，不僅遠大于其它聚合物鍵能，而且還(huan)大于紫外線能量（399KJ/mol）。硅(gui)酮(tong)(tong)密(mi)(mi)封(feng)膠(jiao)(jiao)的(de)(de)分子結構(gou)使得硅(gui)酮(tong)(tong)密(mi)(mi)封(feng)膠(jiao)(jiao)具有優異的(de)(de)耐(nai)(nai)高低溫(wen)性能、耐(nai)(nai)候性能和(he)耐(nai)(nai)紫外老化性能等優點，同(tong)時吸水率低；用于中空玻璃缺點是氣體滲(shen)透率較高。

中空玻璃二道密封膠的正確選用

聚(ju)硫(liu)膠(jiao)(jiao)(jiao)、聚(ju)氨酯(zhi)膠(jiao)(jiao)(jiao)與(yu)玻(bo)(bo)璃(li)(li)的(de)粘結(jie)面如(ru)果(guo)被陽(yang)光長期照射，會(hui)出現脫(tuo)膠(jiao)(jiao)(jiao)的(de)現象(xiang)，會(hui)導致隱框(kuang)玻(bo)(bo)璃(li)(li)幕(mu)墻(qiang)(qiang)(qiang)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)的(de)外片(pian)脫(tuo)落或點支式玻(bo)(bo)璃(li)(li)幕(mu)墻(qiang)(qiang)(qiang)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)密(mi)封(feng)(feng)失效(xiao)，因此隱框(kuang)幕(mu)墻(qiang)(qiang)(qiang)、半隱框(kuang)幕(mu)墻(qiang)(qiang)(qiang)的(de)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)二道密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)必(bi)須(xu)(xu)選(xuan)(xuan)(xuan)用(yong)硅(gui)酮(tong)結(jie)構密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)，且(qie)接口(kou)尺(chi)寸要依據JGJ102《玻(bo)(bo)璃(li)(li)幕(mu)墻(qiang)(qiang)(qiang)工程技術規范》進行(xing)計算；點支式玻(bo)(bo)璃(li)(li)幕(mu)墻(qiang)(qiang)(qiang)的(de)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)二道密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)必(bi)須(xu)(xu)選(xuan)(xuan)(xuan)用(yong)硅(gui)酮(tong)結(jie)構密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)；大尺(chi)寸明(ming)框(kuang)幕(mu)墻(qiang)(qiang)(qiang)的(de)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)二道密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)推薦選(xuan)(xuan)(xuan)用(yong)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)硅(gui)酮(tong)結(jie)構膠(jiao)(jiao)(jiao)；門窗和普通明(ming)框(kuang)幕(mu)墻(qiang)(qiang)(qiang)用(yong)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)二道密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)可(ke)以選(xuan)(xuan)(xuan)用(yong)中(zhong)(zhong)空(kong)玻(bo)(bo)璃(li)(li)硅(gui)酮(tong)密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)、聚(ju)硫(liu)密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)或聚(ju)氨酯(zhi)密(mi)封(feng)(feng)膠(jiao)(jiao)(jiao)。

基于(yu)以上所述，用(yong)戶應根據中(zhong)空玻(bo)璃的(de)(de)具體(ti)應用(yong)選(xuan)(xuan)擇(ze)(ze)(ze)合(he)適的(de)(de)中(zhong)空玻(bo)璃二道(dao)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)產品(pin)。在密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)質(zhi)量(liang)合(he)格的(de)(de)前提下(xia)，只(zhi)要(yao)(yao)(yao)選(xuan)(xuan)擇(ze)(ze)(ze)和(he)使(shi)用(yong)得當(dang)，均可(ke)以制造出(chu)壽命滿足(zu)使(shi)用(yong)要(yao)(yao)(yao)求(qiu)的(de)(de)中(zhong)空玻(bo)璃。但是(shi)如果選(xuan)(xuan)擇(ze)(ze)(ze)和(he)使(shi)用(yong)不(bu)當(dang)，即(ji)使(shi)再(zai)好的(de)(de)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)也有(you)可(ke)能生產出(chu)質(zhi)量(liang)不(bu)合(he)格的(de)(de)中(zhong)空玻(bo)璃。在選(xuan)(xuan)擇(ze)(ze)(ze)二道(dao)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)尤其是(shi)硅(gui)酮(tong)結構密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)時還要(yao)(yao)(yao)綜合(he)考(kao)慮到(dao)硅(gui)酮(tong)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)需滿足(zu)中(zhong)空玻(bo)璃的(de)(de)功能要(yao)(yao)(yao)求(qiu)、與一道(dao)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)丁(ding)基膠(jiao)的(de)(de)相(xiang)容性問題(ti)、硅(gui)酮(tong)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)的(de)(de)性能應符合(he)相(xiang)關標準要(yao)(yao)(yao)求(qiu)。同時，硅(gui)酮(tong)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)產品(pin)的(de)(de)質(zhi)量(liang)穩(wen)定(ding)性、硅(gui)酮(tong)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)膠(jiao)生產廠家(jia)的(de)(de)**度(du)與廠家(jia)在售前、售中(zhong)以及(ji)售后全過程中(zhong)的(de)(de)技術(shu)服務能力與水平也是(shi)用(yong)戶需考(kao)慮的(de)(de)重(zhong)要(yao)(yao)(yao)因素。

中(zhong)空(kong)(kong)玻(bo)璃密(mi)封(feng)(feng)(feng)(feng)膠(jiao)在(zai)整個中(zhong)空(kong)(kong)玻(bo)璃的制(zhi)造成(cheng)本中(zhong)所占的比例(li)較(jiao)低(di)(di)，卻對中(zhong)空(kong)(kong)玻(bo)璃的質量(liang)和使用(yong)壽(shou)命(ming)有著很大(da)的影響，中(zhong)空(kong)(kong)玻(bo)璃結構(gou)密(mi)封(feng)(feng)(feng)(feng)膠(jiao)甚至直(zhi)接關系到(dao)幕(mu)墻安全(quan)問題(ti)。目前，隨著國內密(mi)封(feng)(feng)(feng)(feng)膠(jiao)市(shi)(shi)場競爭(zheng)日(ri)趨激烈，有些密(mi)封(feng)(feng)(feng)(feng)膠(jiao)生產廠(chang)家為了(le)(le)以低(di)(di)價爭(zheng)取客戶，在(zai)降低(di)(di)成(cheng)本時不惜犧(xi)牲產品性能(neng)和質量(liang)，市(shi)(shi)面出現了(le)(le)相當(dang)一部分低(di)(di)質低(di)(di)價的中(zhong)空(kong)(kong)玻(bo)璃密(mi)封(feng)(feng)(feng)(feng)膠(jiao)產品。如用(yong)戶選(xuan)用(yong)不慎，為了(le)(le)節省一點密(mi)封(feng)(feng)(feng)(feng)膠(jiao)的成(cheng)本，而(er)帶來安全(quan)隱(yin)患甚至導致(zhi)質量(liang)事故(gu)，可能(neng)造成(cheng)重(zhong)大(da)損失。

中空(kong)玻璃膠的小編在此呼吁一定要選對的產品，要選好的產品；同時將在后續將為您奉上使用低質量的中空玻璃二道密封膠和使用不當將會產生的各種危害。