多層板是由三(san)層或(huo)多層一毫(hao)米左右的實木單板(ban)(ban)(ban)(ban)或(huo)薄板(ban)(ban)(ban)(ban)膠貼(tie)熱壓制成,常見的有三(san)夾板(ban)(ban)(ban)(ban)、五夾板(ban)(ban)(ban)(ban)、九(jiu)夾板(ban)(ban)(ban)(ban)和(he)十(shi)二夾板(ban)(ban)(ban)(ban)(俗稱三(san)合板(ban)(ban)(ban)(ban),五厘(li)(li)板(ban)(ban)(ban)(ban),九(jiu)厘(li)(li)板(ban)(ban)(ban)(ban),十(shi)二厘(li)(li)板(ban)(ban)(ban)(ban)),結構強(qiang)度好(hao),穩定(ding)性好(hao)。
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)底板、板式家具的(de)背板等各種(zhong)木制(zhi)品工藝。多層板的(de)長寬規(gui)格(ge)和建筑模板的(de)長寬規(gui)格(ge)一(yi)樣,基本是:1220×2440mm,而厚度規(gui)格(ge)則一(yi)般有:3、5、9、12、15、18mm等。主要樹種(zhong)有:山樟、柳按、楊木、桉木等。
多(duo)(duo)層板(ban)有正反面的區別(bie)。挑(tiao)選時,膠合板(ban)要(yao)木紋清晰,正面光(guang)潔平滑(hua),不(bu)毛(mao)糙,要(yao)平整(zheng)無滯手感。多(duo)(duo)層板(ban)選購(gou)應注意,多(duo)(duo)層板(ban)不(bu)應有破損(sun)、碰傷、硬傷、疤節等(deng)疵(ci)點。多(duo)(duo)層板(ban)無脫膠現象(xiang)。
有的多層板(ban)是將兩(liang)個不同紋(wen)路的單(dan)板(ban)貼在一起制成(cheng)的,所以在選擇上要注(zhu)意夾板(ban)拼縫處應嚴密(mi),沒有高低不平(ping)現(xian)(xian)(xian)象。挑選多層板(ban)時(shi),應注(zhu)意挑選不散膠的膠合板(ban)。如果手敲膠合板(ban)各部位時(shi),聲(sheng)音(yin)發脆,則(ze)證(zheng)明質量良好,若聲(sheng)音(yin)發悶,則(ze)表示膠合板(ban)已出現(xian)(xian)(xian)散膠現(xian)(xian)(xian)象。