臺灣櫸造林木製作層壓板的基本力學性質探討

本研究利用臺灣櫸（Zelkova serrata）做為開發薄片型集成板材材料，將不同配置方式之臺灣櫸薄片型層壓板料配合聚胺基甲酸酯樹脂（Polyurethane resin；PU）熱壓完成，並評估其機械性質。評估結果指出6種試材之抗彎彈性模數（Modulus of elasticity；MOE）及抗彎強度（Modulus of rupture；MOR）皆為（方程式略），此即表示上下二外層之木理角度對試材靜曲強度影響最顯著。由拉伸試驗結果顯示試材之拉伸強度受上下二外層之木理角度影響甚鉅（P＜0.05），而以木理角度0°者較佳。於上下二層木理角度相同之條件下，內側夾層為45°及0°之層壓板料具有相同拉伸強度。尺寸安定性方面試驗結果發現上下二層木理角度將顯著性影響厚度膨脹率，其中木理角度為0°者大於90°者。6組試材於浸水及反覆煮沸浸水剝離試驗後皆無剝離現象，符合CNS 11031標準10%以下，顯示層壓板料具有優良膠合層性質。綜合材料之強度性質、尺寸安定性及膠合強度等性質，可得知Type C_(|--|)為薄片型層壓板料之理想配置方式。

關鍵字

臺灣櫸；平地造林木；薄片型層壓板料；機械性質；尺寸安定性

並列摘要

In this study, Zelkova serrata was used as materials for developing the laminated sheet. Different sheet-type configurations of the laminated Z. serrata were all glued by Polyurethane re sin (PU) with hot pressing, a nd e valuated fo r t heir m echanical prope rties. Based o n t he results of modulus of elasticity (MOE) and modulus of rupture (MOR) of the 6 samples, both the elasticity and rupture mechanical properties appeared a rank of (The equation is abbreviated), which indicated that the grain angle of the two outer layers had the most significant effect on t he static bending strength of the samples. In a ddition, from the tensile strength test, our results showed that the tensile properties of samples were greatly affected by the grant angle of the two out er 1 ayers (P ＜ 0.05), and the gra in angle of 0° showed be tter strength. When the out er two-layer grain angle was the same, the laminated Z. serrata with the inner interlayer of 45° and 0° had the same tensile stress and elastic modulus (P ＞ 0.05). In terms of the dimensional stability, our results I ndicated a s ignificant e ffect of t he grain a ngle of t he out er t wo-layer on t he thickness expansion rate, of which the grain angle of 0° showed greater effect than that of 90°. Furthermore, all the 6 groups of samples di d not appear peeling phenomenon by delaminating tests of immersing in water and boiled stripping test. These laminated samples all showed outstanding gluing properties to meet the standard oft he C NS 110 31 with a less t han 10% pe eling ra te. Ba sed on t he strength, dimensional stability, and gluing properties of the six samples, we conclude that Type C_(|--|), is the ideal configuration method for sheet-type laminated Z. serrata.

並列關鍵字

Taiwan Zelkova ； A fforestation t imber ； L aminated s heet ； M echanical prope rties ； Dimensional stability

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