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題名 | 杉木定向粒片板之定向率與超音波傳播速度之關係=The Relationship between the Degree of Flake Alignment and Sound Velocity of China Fir OSB |
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作者 | 陳柏璋; 王松永; Chen, Bor-jang; Wang, Song-yung; |
期刊 | 林產工業 |
出版日期 | 19990900 |
卷期 | 18:3 1999.09[民88.09] |
頁次 | 頁269-278 |
分類號 | 436.18 |
語文 | chi |
關鍵詞 | 杉木; 定向粒片板; 長薄片型粒片; 定向率; 音速; China fir; Oriented strand board; Flake alignment; Sound velocity; |
中文摘要 | 定向粒片板定向率累計至15°時,已佔全部長薄片型粒片之2/3,具優良定向效果 。 全板面板木理方向與機械方向成平行之音速 (v��) 為 4586 ∼ 4632m/sec;而面板木理方 向與機械方向成垂直之音速 (V) 為 1430 ∼ 1565m/sec。 V��/V 之比值, 約 2.93 ∼ 3.24 之間。 音速值會隨�鮈X之增加而遞減, 至 V �Y時會減少至約 1/2。 由 Hankinson's formula 所得之 n 值為 1.83 ∼ 1.89。小試片之音速值表現與全板相同。破壞係數 (MOR) 會隨密度及用膠量之增加而增大,彈性係數 (MOE) 亦同。靜曲強度異方性:MOR() 為 4.54 ∼ 5.02,MOE() 為 6.83 ∼ 11.01,故定向效果極優良。 MOR、 MOE、動彈性係數 (MOEd) 各與音速值 (V) 間,均具極顯著之正相關。 |
英文摘要 | The purposes of this study were to investigate the flake alignment on the orthotropic properties of OSB, such as sound velocity and static bending strength. Furthermore, the relationships among the sound velocity, MOR and MOE due to the flake alignment were also discussed. The results were summarized as follows: 1.The grain direction of 2/3 of the total flakes was about 15 ° ,showing good performance of OSB. 2.The sound velocity of OSB with grain direction parallel to the machine direction (V��) was 4586 ∼ 4632m/sec, and that perpendicular to the machine direction (V) was 1430 ∼ 1565m/sec. The ratio of (V��/V) was 2.93 ∼ 3.24. The bending specimen had the same phenomenon. 3.The sound velocity decreased with increasing grain direction on the surface of OSB. 4.The n values derived from Hankinson's formula were 1.83 ∼ 1.89. 5.The MOR and MOE increased with increasing the resin content and board density. The orthotropic property of MOR was 4.54 ∼ 5.02, and that of MOE was 6.83 ∼ 11.01. 6.The sound velocity was highly related with MOR and MOE and dynamic MOE. |
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