水蒸気処理ストランドを表層に用いた三層パーティクルボード　　ボード物性に及ぼす密度の影響

• 関野 登

  岩手大学農学部農林環境科学科

• 井上 雅文

  京都大学木質科学研究所

• 山内 秀文

  秋田県立大学木材高度加工研究所

書誌事項

タイトル別名

• Three-Layered Particleboards with Steam Pre-Treated Face Strands. Effects of Panel Density on the Basic Properties.
• スイジョウキ ショリ ストランド オ ヒョウソウ ニ モチイタ サンソウ パーティクルボード ボード ブッセイ ニ オヨボス ミツド ノ エイキョウ
• Effects of Panel Density on the Basic Properties
• ボード物性に及ぼす密度の影響

抄録

Mechanical properties of particleboards such as surface hardness, modulus of elasticity (MOE), bending strength (MOR) can be improved by high densification of its face layers. One of the effective ways for this purpose is introducing a steam pre-treatment technique into preparations of wood furnish for face layers, because steaming wood at high temperature increases wood compressibility. Also steam treated and then compressed particles show much less irreversible swelling than ordinary particles. This excellent dimensional stability would contribute to reductions of panel thickness swellings.<br>Three-layered particleboards with a density ranging 0.5-0.8g/cm³, a face to core ratio of 2/3, and a thickness of 12mm were manufactured from Sugi (Cryptomeria japonica D. Don) face strands (75mm×9.0mm×0.67mm) and core particles (14.9mm×2.9mm×0.97mm). The face strands were steam pre-treated in an autoclave by introducing high pressure steam at 210°C for 10 minutes. Phenol-formaldehyde resin was used as a binder. The manufactured panels showed the following characteristics, when compared to control panels with non-treated face strands: 1) the maximum density through the thickness increased by 10-15 percent, 2) surface hardness increased by 30 percent, 3) thickness swellings were greatly improved, this being pronounced at higher density panels, 4) however, the reduction of linear expansion was not obvious because this layer structure showed excellent resistance against for in-plane swelling, 5) in spite of face layer's high densification, MOE and proportional limit stress in bending were almost the same as the controls, 6) MOR and withdrawal resistance of wood screw decreased at most by 30 percent due to the reduction of wood cohesion itself caused by steaming.

収録刊行物

• 材料

  材料 50 (4), 415-420, 2001

  公益社団法人 日本材料学会

キーワード

• Steam pre-treatment
• Three-layered particleboard
• Mechanical property
• Dimensional stability

詳細情報

• CRID: 1390282680369036544
• NII論文ID: 110002292574
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.50.415
• ISSN: 18807488
• ISSN: 05145163
• NDL書誌ID: 5748847
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5748847
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可