長束狀單板層積板製造條件之研究（Ⅰ）

The Manufacturing Conditions of Long Stick Veneer Laminated Board (LSB) (Ⅰ)

王永松(Song-Yung Wang) ； 洪崇彬(Chung-Pin Hong)

《林產工業》 14卷3期 (1995/09) Pp. 400-413

https://doi.org/10.6561/FPI.1995.14(3).5

摘要

本研究目的係探討單板樹種，用膠量，氣乾比重，單板構成比等條件對長束狀單板層積板強度性質之影響，得到次述結果。（l）柳杉及台灣杉LSB靜曲性能（MOR及MOE），壓縮性能（σ c ，Ec）及內聚強度（I.B.）比同比重之定向粒片板為大，其值已與構造用合板性能相當。（2）構成比1:1:1之LSB，靜曲強度及靜曲剛性異方性較合板及OSB大很多，尤其以靜曲剛性為甚，但仍很大，就板材安定性觀之，stick的構成有再加以探討之必要。（3）柳杉LSB之靜曲強度較台灣杉LSB為大，但就比靜曲強度（MOR/ru及MOE/ru）觀之，經鄧肯新多變域分析，在兩樹種間，三種用膠量均無顯著差異。（4）柳杉LSB之σc // /ru，I.B./ru值在三種用膠量間無顯著性差異，但台灣杉LSB則以用膠量高者會顯著的大於用膠量較低者。（5）台灣杉與柳杉LSB之σc // /ru及I.B./ru值，除TP8試材會顯著大於JP8試材外，其他試材均無顯著性差異。

關鍵字

長束狀單板層積板 ； 用膠暈 ； 單板構成比 ； 機械強度 ； 比強度

並列摘要

The purpose of this study was to investigate the effects of manufactural conditions on the mechanical properties of long stick board (LSB). The manufactural conditions included veneer species, resin content, veneer construction and air-dried specific gravity of LSB. The veneers were peeled from Japanese cedar (Cryptomeria japconica D. Don) and Taiwania (Taiwania cryptomerioides). The powder type of phenol formaldehyde resin was used as a binder. The results were summarized as follows: (1) The values of bending strength (MOR and MOE), compression strength (σC and Ec) and internal bond strength (I.B.) of LSB made from Japanese cedar and Taiwania were higher than those of oriented strand board (OSB) with the same specific gravity. Their values were nearly equal to using as construction plywoods. (2) The anisotropy of bending strength (MOR 〃 /MOR⊥) and stiffness (MOE 〃 /MOE⊥) for LSB made of 1:1:1 construction ratio were more than those of plywoods and OSBs. Especially in the case of bending stiffness. However, the anisotropy of construction strength was less compared to bending strength, but it was also larger than that of plywood, therefore from the view of dimensional stability of board, the construction of stick veneer needs further investigation. (3) The bending strength of Japanese cedar LSB was larger than that of Taiwania LSB. However, from the view of specific bending strength (MPR/ru and MOE /ru), there were no significant differences between Japanese cedar and Taiwania LSB, among three different resin contents analyzed by Duncan's new multiple range method. (4) There were significant differences among three different resin contents for σc 〃 /ru and I.B./ru values of Japanese cedar LSB. However, significant differences existed between Taiwania LSB with high resin content and that with low resin content. The value of σc 〃 /ru and I.B./ru for Taiwania LSB (TP8 sample) were significant larger than those of Japanese cedar LSB (JP8 sample). However, there were no significant differences among other samples.

並列關鍵字

Long stick board (LSB) ； resin content ； veneer construction ratio ； mechanical strength properties ； specific strength