速生樹種各種基本理化學性質及膠合方法影響所製及成材性能之研究（第十二報）台灣二葉松、桃花心木、柚木縱向接合製作集成材之研究

Effect of Physicochemical Properties and Gluing Methods on the Qualities of Laminated Wood Made from Fast-Growing Species (12) -Studies on the Fabrication of End-to-End Grain Joint Laminated Wood from Taiwan Red Pine, Honduras Mahogany and Common Teak

李文昭(Wen-Jau Lii) ； 劉正字(Cheng-Tzu Liu)

《林產工業》 10卷1期 (1991/03) Pp. 25-34

https://doi.org/10.6561/FPI.1991.10(1).2

摘要

本研究以台灣二葉松、桃花心木、柚木為試材，尿素膠為膠合劑，探討其經由各種不同對接、斜接、指接等端部接合斷面及接口排列位置所製作之四層集成材之性質，所得結論如下：1.對接膠合集成材隨各層接口位置錯開之間距加大，其強度增加；而底層改用完整集成元者，其強度顯著改良而與四層均用完整集成元所製作者強度相近。2.斜接膠合集成材隨斜角長度（L/H）及各層接口間距加大，其強度增加；且底層改用完整集成元者其強度亦明顯增加。3.指接膠合者其靜曲強度略低於L/H為8.0之斜接膠合者，且將各層接口位置錯開時其對強度之改良效果並不顯著。

關鍵字

對接 ； 斜接 ； 指接 ； 高週波加熱膠合

並列摘要

The purpose of this study was to investigate the properties of 4-plies laminated wood made from Taiwan red pine , Honduras mahogany and common teak with butt, scarf and finger joint by UF adhesive, and with different location of joint in laminated wood. The results obtained were as follows: 1. The strength of butt joint laminated wood could be improved when the distance between each butt joint increased, when use the full-length lamina as bottom lamina in laminated wood, its strength would be improved significantly and up to the strength of laminated wood made from four full-length laminas. 2. The strength of scarf joint laminated wood could be improved as increasing either the ratio of horizontal length (L) to vertical length (H) of the slope or the distance between each scarf joint. The over all strength could be improved obviously when use the full-length lamina as bottom lamina in scarf joint laminated wood. 3. The bending strength of finger joint laminated wood was slightly lower than the scarf joint laminated wood with L/H ratio of 8.0. The strength of finger joint laminated wood had a little or no progress as the finger joint position in each lamina was not on a line.

並列關鍵字

Butt joint ； Scarf joint ； Finger joint ； Radio frequency heating