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Applicability of Plantation Wood for Blockboard and Fancy Plywood Making

以造林木製造木芯板及化粧合板之實用性研究

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摘要


本研究計畫之目的在於探討國內造林木製造木芯板與化粧合板之實用性,以期提高造林木之利用價值,進而達到有效利用森林資源之目標。試驗中以造林木之杉木作為木芯與中板,而以進口之放射松單板作為副心板、面板與底板,分別製造木芯板與合板,又以所製得之合板作為台板製造化粧合板。試板經由一些性質試驗以檢測其實用性。由木芯板之靜曲強度性質試驗結果得知無論是縱向或是橫向靜曲強度性質均不受木芯拼板膠合與否之影響,且縱向靜曲強度性質較橫向者大。芯板未經拼板膠合之木芯板在初期吸濕三種測定方向之翹曲率均較芯板經拼板膠合者小,且橫向翹曲率與縱向翹曲率之比價亦較芯板經拼板膠合者明顯減小。由合板之試驗結果得知以杉木為中板所製得合板之拉伸剪斷膠合強度與放射松為中板者相近,並且較市售柳桉合板為佳,而以杉木為中板之合板無論剪斷方向與面板木理平行或成45°,其嵌板剪斷膠合強度較以放射松為中板者略小,雖然剪斷方向與面板木理平行之嵌板剪斷強度較市售柳桉合板大,但是剪斷方向與面板木理成45°時則較小。超音波檢測合板欠膠之試驗結果顯示可使用超音波進行合板之非破壞試驗。又由試驗得知化粧合板經NC塗料塗裝後,其表面光澤度、硬度與接觸角均較無塗裝者明顯提高。

關鍵字

人工造林木 杉木 木芯板 合板 化粧合板

並列摘要


This study focused on the use of plantation wood grown in Taiwan for making wood blockboard and fancy plywood and their actual practice tests. The ultimate goal of the study is to enhance the value of the wood for these uses, thereby stimulating more effective use of forest resources. In the experiment, the wood of plantation China fir (Cunninghamia lanceolata) was used as central block or ply. The veneers of radiata pine (an imported wood species) were placed near the central layer and also served as the face plies. Then the wood blockboard and the plywood were made. The resulting wood blockboard and plywood were further processed to form the fancy plywood by way of overlaying. Certain property tests were chosen to examine the test panels in an attempt to learn their application potentials. The test results obtained from the static bending of the wood blockboard showed no difference as to whether the glue was applied or if it was not applied to the edge of the wood blocks that formed the core of the panel. As noted, the bending strength was stronger in the parallel grain direction than in perpendicular direction. The use of glue on the edge of the wood blocks caused an adverse effect on the panel stability with a severer warpage result as compared to those blocks without glue on edge. The shear test results indicated that the plywood with China fir veneer as central ply had a comparable glue shear strength to that with radiata pine veneer and that both panels were superior to commercial lauan plywood. The shear through-the-thickness tests of plywood were conducted using the test specimens prepared with the grain of face veneers in the parallel or 45 direction. In both cases, the plywood with radiata pine as the core showed higher shear strengths than those of China fir. The use of China fir veneer core showed a better shear strength than that of commercial lauan plywood when tested in the parallel grain direction of face veneer. The reverse was true in the 45° direction. The study used an ultrasonic wave test to examine the starved joint of plywood defect. The results were promising, indicating the nondestructive test potential. Furthermore, it was found that after applying NC lacquer, the degree of gloss, surface hardness, and wetting angle of the fancy plywood all increased. It is concluded that the plantation wood of China fir may be used as core materials in making blockboard and plywood.

被引用紀錄


鄭煥諭(2007)。木材防腐業與製材業勞工之CCA暴露對鉻及砷的生物性指標的影響〔碩士論文,長榮大學〕。華藝線上圖書館。https://doi.org/10.6833%2fCJCU.2007.00148

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