速生樹種之理化學性質及膠合方法對集成材性能之影響（第九報）－相思樹、楓香、台灣杉縱向接合製作成材之研究

Effect of Physcochemical Properties and Gluing Methods on the Qualities Laminate Wood Made from Fast-Growing Species (9) Studies on the Fabrication of End-to-End Grain Joint Laminated Wood from Taiwan Acacia, Formosan Sweet Gum and Taiwania

劉正字(Cheng-Tzu Liu) ； 李文昭(Wen-Jau Lii)

《林產工業》 8卷4期 (1989/12) Pp. 75-84

https://doi.org/10.6561/FPI.1989.8(4).7

摘要

本研究以相思樹、楓香、台灣杉為試材，UF膠為膠合劑，探討其經由各種不同對接、斜接、指接等縱向接合斷面及接口排列位置所製作之四層集成材之性質，結果以對接者強度最差，若將各層接口位置錯開則可改善其集成材強度，然效果有限，但若將底層改用完整集成元者，則強度明顯提高而可達與4層均為完整集庇元者相近似之強度；斜接者隨1/h及各層接口間距加大，其強度增加，且比重愈大之材種所製作之集成材，其1/h值及接口間距之要求愈大；指接者其強度略低於1/h為8.0之斜接集成材，而將各層接口錯開或底層採用完整集成元則強度可進一步提高。

關鍵字

集成元 ； 對接 ； 斜接 ； 指接 ； 高週波加熱

並列摘要

The purpose of this study was to investigate the properties of the four-plied laminated wood with different kinds and locations of end-to-end grain joint made from Taiwan acacia. Formosan sweet gum and Taiwania with UF adhesive. The property of butt joint laminated wood was the worst, but increasing the distance of butt joint between each lamina could slightly improve it. When use a full-length lamina as bottom lamina of butt joint laminated wood, the strength could be obviously raised as to the strength of laminated wood made from four full-length laminas. The strength of scarf joint laminated wood was better as increasing the 1/h ratio and joint distance between each lamina and also the higher of these two values needed to be in the higher specific gravity of the wood. The strength of finger joint laminated wood was slightly lower than scarf joint laminated wood with 1/h ratio 8.0. Increase the distance of joint between each lamina or use the full-length lamina the bottom lamina of laminated wood could also improved the strength of finger joint laminated wood.

並列關鍵字

Lamina ； Butt joint ； Scarf joint ； Finger joint ； High radio frequency heating