多層板是由三(san)(san)層(ceng)或(huo)多層(ceng)一毫米(mi)左右的實木單(dan)板(ban)(ban)(ban)或(huo)薄板(ban)(ban)(ban)膠貼熱(re)壓制(zhi)成(cheng),常見的有(you)三(san)(san)夾(jia)板(ban)(ban)(ban)、五夾(jia)板(ban)(ban)(ban)、九(jiu)夾(jia)板(ban)(ban)(ban)和十二(er)夾(jia)板(ban)(ban)(ban)(俗稱三(san)(san)合(he)板(ban)(ban)(ban),五厘板(ban)(ban)(ban),九(jiu)厘板(ban)(ban)(ban),十二(er)厘板(ban)(ban)(ban)),結構強度好,穩(wen)定(ding)性好。
膠合板含膠量大,施工時要做好封邊處理,晝減少污染。膠合板主要用于裝飾面板的(de)底(di)板(ban)、板(ban)式家具的(de)背板(ban)等(deng)(deng)各種木制品(pin)工藝。多層(ceng)板(ban)的(de)長(chang)寬(kuan)規格和建筑模板(ban)的(de)長(chang)寬(kuan)規格一(yi)樣,基本是(shi):1220×2440mm,而厚度規格則一(yi)般有(you):3、5、9、12、15、18mm等(deng)(deng)。主(zhu)要(yao)樹種有(you):山樟、柳按、楊(yang)木、桉木等(deng)(deng)。
多層(ceng)(ceng)板有正(zheng)反面的區別(bie)。挑選(xuan)時,膠合(he)板要(yao)木紋清晰,正(zheng)面光潔平滑,不毛(mao)糙,要(yao)平整(zheng)無滯手感。多層(ceng)(ceng)板選(xuan)購應注意,多層(ceng)(ceng)板不應有破損、碰傷、硬傷、疤節等疵點(dian)。多層(ceng)(ceng)板無脫膠現(xian)象。
有(you)的多層(ceng)板(ban)(ban)是將兩(liang)個不同紋路(lu)的單板(ban)(ban)貼在一(yi)起(qi)制成的,所以(yi)在選擇上要注意(yi)(yi)夾板(ban)(ban)拼縫處(chu)應(ying)嚴密,沒有(you)高低(di)不平現(xian)象(xiang)。挑選多層(ceng)板(ban)(ban)時(shi),應(ying)注意(yi)(yi)挑選不散膠(jiao)(jiao)(jiao)的膠(jiao)(jiao)(jiao)合(he)(he)板(ban)(ban)。如果(guo)手敲(qiao)膠(jiao)(jiao)(jiao)合(he)(he)板(ban)(ban)各部(bu)位時(shi),聲(sheng)音(yin)發脆,則證明質(zhi)量良好,若聲(sheng)音(yin)發悶,則表(biao)示膠(jiao)(jiao)(jiao)合(he)(he)板(ban)(ban)已出現(xian)散膠(jiao)(jiao)(jiao)現(xian)象(xiang)。