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題 名 | 造林木之粒片板製造:日本柳杉製造定向粒片板及低密度粒片板 |
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作 者 | 陳載永; | 書刊名 | 林產工業 |
卷 期 | 7:3 1988.09[民77.09] |
頁 次 | 頁13-30 |
分類號 | 474.5 |
關鍵詞 | 日本; 低密度; 定向; 柳杉; 粒片板; 造林木; 製造; |
語 文 | 中文(Chinese) |
中文摘要 | 以日本柳杉人工林之疏戌木為原料製造粒片板。其粒片尺寸為厚度平均0.33~0.50mm,長度12.2mm及寬度為1.23mm。兩系列粒片板均以Isocy-anate(異氰酸鹽)樹脂為膠合劑,其用膠量為絕乾木材粒片之10%,丙酮添加量為用膠量之20%,其試驗條件如下:1.靜電式及機械式定向抄板方法對粒片板性質之影響。當靜電式定向方法之變化條件為極板間之電壓,分為4,3及2 KV/cm時,機械式定向方法之變化條件為自由落下距離,區別為5,10及15mm,粒片板比重為0.4及0.6,厚度12mm,熱壓條件為160℃,3.5 min,10kg f/cm^2。2. 木材原料之比重對低密度粒片板性質之影響,於此除以日本柳杉(Cryptomeria Japonica),比重0.346)為原料外,為比較起見,尚取柳桉(Shorea spp.,比重0.321),冰片樹(Dryobalanops spp,比重0.675)及第倫桃(Dillenia spp.,比重0.692)為原料,各製造密度O.3~0.4 g/cm^3之粒片板,厚度20 mm。兩系列試驗之結果綜合如下:1.定向抄板方法有改善柳杉粒斤扳平行方向之MOR與MOE之效果,但對內聚力之作用不明顯。2.以極板間電壓4 KV/cm之靜電式定向方法及以粒片自由落下距離5 mm之機械式定向方法所抄造之粒片板,具有較良好之性質。3.比重低之日本柳杉及Shorea spp.(柳核)較比重高之Dryobalanops spp.(水片樹)與Dillenia spp.(第倫桃)更適宜製造低密度粒片板。 |
英文摘要 | Wood thinnings from Cryptomeria japonica tree plantations were used as raw materials in the manufacture of particleboards. Average dimensions of particles were 0.33mm-0.50mm thick, 12.2mm long, and 1.23mm wide. Two experiments were conducted using an isocyanate compound resin (20% acetone added) at 10% resin content level based on oven dry wood weight as adhesive. These were as follows: 1. Influence of electrostatic and mechanical orientation on the properties of particleboards-In the electrostatic method of particle orientation, electrosstatic field intensity was varied at 4,3, and 2 Kv/cm while particle free fall distance was varied at 5, 10, and 15mm in the mechanical orientation method. Board thickness was 12mm and specific gravity(SG), 0.4 and 0.6, respectively. Pressing conditions were set at 160°C and 3.5 minutes at 10Kgf/cm^2 initial pressure. 2. Influence of specific gravity of wood raw material on the properties of low density particleboards-In this investigation , comparisons were made on particleboards from Cryptomeria japonica (SG=0.346) with those from other raw materials, i.e. Shorea spp. (SG=0.321), Dryobalanops spp. (SG=0.675), and Dillenia spp. (SG=0.692). Twenty millimeter thick particleboardsat 0.3-0.4 g/cm^3 density were manufactured by the same glue blending condition as in the first experiment. Pressing conditions were 160°C and 5 minutesat 10 Kgf/cm^2 initial pressure. The experimental results are summarized as follows: 1. Oriented particleboards from Cryptomeria japonica showed effective improvement in moduli of rupture (MOR) and elasticity (MOE) in the direction parallel to target particle orientation. Orientation showed no significant effect on internal bond (IB). 2. Boards formed by the electrostatic orientation at 4 Kv/cm electrostatic field intensity level and by mechanical orientation method with 5 mm particle free fall distance showed better properties. 3. Wood raw materials with lower densities such as Cryptomeria japonica and Shorea spp. are more suitable for the production of low density particleboards than those with higher densities such as Dryobalanops spp. and Dillenia spp. |
本系統中英文摘要資訊取自各篇刊載內容。