木質複合板之研究（一）定向粒片層為芯層之複合板製造

Studies on Wood Composite Board (Ⅰ) Investigation on Oriented Particle-mat Used in the Core Layer for Making Wood Composite Board

黃耀富(Yaw-Fuh Huang) ； 林錦盛(Jing-Sheng Lin) ； 侯永焜(Yung-Kueng Hou) ； 林志雄(Chi-Hsung Lin) ； 陳坤鎮(Kueng-Cheng Chen)

《林產工業》 14卷2期 (1995/06) Pp. 17-38

https://doi.org/10.6561/FPI.1995.14(2).2

摘要

以省產杉木（＂Cunninghamia lanceolata＂ (Lamb.) Hook）間伐小徑木為原料，製備長度60mm之粒片，以隔板間隔10mm，隔板方向與衝程方向平行，衝程距離為50mm，使用水溶性酚甲醛樹脂膠合劑，用膠量為8%之定向粒片層為芯層，探討製造複合板之可行性。其結果如下：（1）在相同密度條件下，上下兩表層經單板複合後之複合板，其板面吸水量均較未複合者為低。（2）各種製板之木螺絲保持力除製板密度0.4g/cm^3之外，密度0.5g/cm^3及0.6g/cm^3之製板均符合CNS-2215中100型（30Kgf）之標準。（3）各種製板之內聚強度除未定向粒片板密度0.5g/cm^3符合CNS-2215中150型（2Kgf/cm^2）外，其餘均符合CNS-2215中200型（3Kgf/cm^2）之標準。（4）單板複合單層構造定向粒片板（C-SOSB）與單層構造定向粒片板（S-OSB）之比靜曲破壞強度（MOR）並無明顯之差異，但C-SOSB之靜曲彈性係數（MOE）大於S-OSB者。單板複合三層構造定向粒片板（C-TOSB）密度0.4g/cm^3 及0.5g/cm^3之靜曲MOR均較未複合之三層構造定向粒片板（T-OSB）者低，但靜曲MOE不論何種密度（0.4, 0.5及0.6g/cm^3）均以C-TOSB為高。單板複合未定向粒片板（C-RPB）之靜曲MOR及MOE均明顯的較未定向粒片板（RPB）高，且其靜曲強度均均符合CNS-2215中200型（180Kgf/cm^2）之標準。又S-OSB之縱向之靜曲MOR高於T-OSB，但橫向則相反。就整體而言，各種製板均以密度0.5g/cm^3之內聚強度、比靜曲破壞強度、殘存強度為最佳，因此從力學性質及經濟成本而言，芯層之定向粒片層以密度0.5g/cm^3者最為適當。（5）相同種類之各種製板，縱向靜曲彈性係數實測值均大於理論值，約為1.39~2.63倍。橫向之靜曲彈性係數之實測值小於理論值約為0.41~0.81倍。

關鍵字

複合板 ； 定向粒片層 ； 芯層

並列摘要

The feasibility of oriented particle-mat used in the core layer and veneer laminated on both faces for making wood composite board is investigated. Small sized logs of China -fir (＂Cunninghamia lanceolata＂ (Lamb.) Hook) from thinning operation were used for making strands (60mm in length.). The strip spacing of aligning box was 10mm and the strip direction was parallel to the direction of vibration, which the distance of amplitude was 50mm. Adehesive was water soluble phenol-formaldehyde resin glue, and resin content level was 8%. The results obtained by this experiment may be summarized as follows: (1) The amount of water absorption by the veneer overlayed composite boards were less than that unlaminated boards under the same density conditions. (2) The screw holding ability (SH.) of the boards fabricated with the densities of 0.5g/cm^3 and 0.6g/cm^3 could meet the requirement for the Type 100 described under the CNS-2215. (3) The internal bonding strength (IB) of random particleboard (RPB) fabricated with the density of 0.5g/cm^3 could meet the requirement for the Type 150 described under the CNS-2215. And the boards fabricated with the other conditions could meet the requirement for the Type 200 described under the CNS2215. (4) There are less difference in the specific bending MOR between single layer oriented particle-mat veneer overlayed composite board (C-SOSB) and single layer oriented particleboard (S-OSB). The static bending MOR of three layer oriented particle-mat veneer overlayed composite boards (C-TOSB) fabricated with the densities of 0.4g/cm^3 and 0.5g/cm^3 were lower than that of three layer oriented particleboards (T-OSB). The static bending MOE of composite board (C-TOSB) with all density conditions (0.4, 0.5 and 0.6g/cm^3) were higher than that of three layer oriented particleboards (T-OSB). The static bending MOR and MOE of random particle-mat veneer overlayed composite board(CRPB) are higher than that of random particleboard (RPB), obviously, and the static bending MOR and MOE of those boards can meet the requirement for the Type 200 described ;under the CNS-2215.The static bending MOR of SOSB, tested in the direction parallel to the strand orientation are higher than that of T-OSB, the contrary results can be found for the specimens tested in the direction perpendicular to the strand orientation. Based on the mechanical properties and cost, the suitable condition for core layer of oriented particle-mat is using the density of 0.5 g/cm^3, furthermore, those IE strength, specific bending MOR and residual strength of the board are also higher than those of the boards fabricated with the other density conditions. (5) The static bending MOE values of the boards tested in the parallel direction were higher than that of theoretical 1.39~2.63 times for the boards with each manufacturing condition. Those values of the boards tested in the perperdicular direction were lower than that of theoretical 0.41~0.81 times.

並列關鍵字

Composite board ； Core layer of oriented particle-mat ； Core layer