膠合(he)(he)板(ban)(ban)(ban)(ban)(ban)是將原(yuan)木(mu)(mu)沿(yan)年輪方向旋切成大張單(dan)(dan)板(ban)(ban)(ban)(ban)(ban)，經干燥、涂膠后按相鄰單(dan)(dan)板(ban)(ban)(ban)(ban)(ban)層(ceng)(ceng)木(mu)(mu)紋方向相互垂(chui)直的(de)原(yuan)則(ze)組(zu)坯、膠合(he)(he)而成的(de)板(ban)(ban)(ban)(ban)(ban)材。單(dan)(dan)板(ban)(ban)(ban)(ban)(ban)層(ceng)(ceng)數為(wei)奇數，一般為(wei)三(san)層(ceng)(ceng)至十三(san)層(ceng)(ceng)，常見的(de)有三(san)合(he)(he)板(ban)(ban)(ban)(ban)(ban)、五(wu)合(he)(he)板(ban)(ban)(ban)(ban)(ban)、九合(he)(he)板(ban)(ban)(ban)(ban)(ban)、和十三(san)合(he)(he)板(ban)(ban)(ban)(ban)(ban)（市(shi)場上(shang)俗稱(cheng)為(wei)三(san)厘(li)(li)板(ban)(ban)(ban)(ban)(ban)，五(wu)厘(li)(li)板(ban)(ban)(ban)(ban)(ban)，九厘(li)(li)板(ban)(ban)(ban)(ban)(ban)，十三(san)厘(li)(li)板(ban)(ban)(ban)(ban)(ban)）。最外(wai)層(ceng)(ceng)的(de)正面單(dan)(dan)板(ban)(ban)(ban)(ban)(ban)稱(cheng)為(wei)面板(ban)(ban)(ban)(ban)(ban)，反面的(de)稱(cheng)為(wei)背(bei)板(ban)(ban)(ban)(ban)(ban)，內層(ceng)(ceng)板(ban)(ban)(ban)(ban)(ban)稱(cheng)為(wei)芯(xin)板(ban)(ban)(ban)(ban)(ban)。

一類膠合(he)板為耐(nai)氣候、耐(nai)沸水膠合(he)板，由此(ci)及彼有耐(nai)久、耐(nai)高溫，能蒸汽處理的優點(dian)；

二類膠合(he)(he)板為耐(nai)水膠合(he)(he)板，能在冷水中浸漬和短(duan)時間熱(re)水浸漬；

三類(lei)膠(jiao)合(he)板(ban)為耐潮(chao)膠(jiao)合(he)板(ban)，能在冷(leng)水中短(duan)時間浸漬，適于室內常溫下使用(yong)(yong)。用(yong)(yong)于家具和一般建筑用(yong)(yong)途；

四類膠(jiao)合板為(wei)不耐(nai)潮膠(jiao)合板，在室內常態下使(shi)用(yong)，一般用(yong)途膠(jiao)合板用(yong)材有櫸木(mu)(mu)、椴木(mu)(mu)、水曲柳、樺木(mu)(mu)、榆(yu)木(mu)(mu)、楊(yang)木(mu)(mu)等。

建(jian)筑用(yong)膠合板(ban)主要(yao)在室外條件下使用(yong)，如(ru)建(jian)筑外裝(zhuang)修和混泥土(tu)模板(ban)，在裝(zhuang)飾工(gong)程中主要(yao)應用(yong)于天花板(ban)、墻裙(qun)、地板(ban)襯板(ban)等。