拋光骨膠使用
使(shi)(shi)用(yong)(yong)(yong)(yong)骨膠(jiao)(jiao)時(shi),先用(yong)(yong)(yong)(yong)體積(ji)相等或略多的水(shui)(用(yong)(yong)(yong)(yong)熱(re)(re)水(shui))將骨膠(jiao)(jiao)浸(jin)泡10小時(shi)左右,使(shi)(shi)膠(jiao)(jiao)塊變(bian)軟,然(ran)后加(jia)熱(re)(re)至(zhi)75℃左右,使(shi)(shi)其(qi)成為(wei)膠(jiao)(jiao)液即可使(shi)(shi)用(yong)(yong)(yong)(yong)。膠(jiao)(jiao)與水(shui)的比例(li)應根據所需黏(nian)度(du)(du)而(er)定(ding),如水(shui)多黏(nian)度(du)(du)低而(er)稀(xi):加(jia)水(shui)少黏(nian)度(du)(du)就高而(er)稠。熱(re)(re)膠(jiao)(jiao)時(shi)膠(jiao)(jiao)溫不宜過高,溫度(du)(du)超過100℃則會因分(fen)子降解而(er)使(shi)(shi)黏(nian)度(du)(du)下降,膠(jiao)(jiao)老化(hua)變(bian)質。骨膠(jiao)(jiao)在使(shi)(shi)用(yong)(yong)(yong)(yong)中有微(wei)量沉淀,所以(yi)要邊用(yong)(yong)(yong)(yong)邊加(jia)水(shui)井進行必要的攪拌,以(yi)調節黏(nian)度(du)(du)和(he)流(liu)動性。熱(re)(re)膠(jiao)(jiao)時(shi)采用(yong)(yong)(yong)(yong)浴熱(re)(re)方法,決不可用(yong)(yong)(yong)(yong)儲(chu)存(cun)膠(jiao)(jiao)的容(rong)器直(zhi)接加(jia)熱(re)(re)。
骨(gu)(gu)膠(jiao)(jiao)(jiao)要(yao)保持(chi)(chi)在一(yi)(yi)定溫(wen)度條(tiao)件下才可使(shi)(shi)用(yong),因此,當使(shi)(shi)用(yong)中需(xu)加水(shui)時,加入的水(shui)與膠(jiao)(jiao)(jiao)體溫(wen)度應(ying)基本相同,不可加入冷(leng)水(shui)。因為(wei)骨(gu)(gu)膠(jiao)(jiao)(jiao)要(yao)保持(chi)(chi)一(yi)(yi)定溫(wen)度(75℃±10℃),加入冷(leng)水(shui)后膠(jiao)(jiao)(jiao)水(shui)的溫(wen)度驟降會出現(xian)凝條(tiao)塊(kuai)狀,而(er)影響黏結效果。使(shi)(shi)用(yong)骨(gu)(gu)膠(jiao)(jiao)(jiao)時涂膠(jiao)(jiao)(jiao)速度要(yao)快、均(jun)勻(yun),不要(yao)一(yi)(yi)次蘸(zhan)膠(jiao)(jiao)(jiao)過(guo)多造成膠(jiao)(jiao)(jiao)層不平、聯粘(zhan)漏膠(jiao)(jiao)(jiao)等問題。