A Novel Rapid Artificial Drying Schedule for Japanese Cedar Boards Retaining Natural Durability

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  • Hattori Takefumi
    Faculty of Bioscience and Bioindustry, Tokushima University Bio-Innovetion Research Center, Tokushima University
  • Hashimoto Shigeru
    Tokushima Prefectural Agriculture, Forestry, and Fisheries Technology Support Center
  • Miyoshi Yu
    Tokushima Prefectural Agriculture, Forestry, and Fisheries Technology Support Center
  • Noji Masaaki
    Faculty of Pharmaceutical Sciences, Tokushima Bunri University
  • Umeyama Akemi
    Faculty of Pharmaceutical Sciences, Tokushima Bunri University
  • Yoshimura Tsuyoshi
    Research Institute for Sustainable Humanosphere, Kyoto University
  • Hermawan Andi
    Universiti Malaysia Kelantan Faculty of Agriculture, Kyushu University
  • Fujimoto Noboru
    Faculty of Agriculture, Kyushu University

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Other Title
  • 耐腐朽性，耐蟻性を保持したスギ板材の迅速な新規人工乾燥法の検討
  • タイフキュウセイ,タイアリセイ オ ホジ シタ スギ イタザイ ノ ジンソク ナ シンキ ジンコウ カンソウホウ ノ ケントウ

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<p>The objective of this study was to develop a novel and rapid artificial drying schedule for a boards of Japanese cedar (Cryptomeria japonica). Boards of green wood were dried to a moisture content of 15% under 9 artificial drying conditions with a combination of three dry-bulb temperatures (50°C, 70°C and 90°C) and three wet-bulb depressions (5°C, 10°C and 20°C). We found that the condition of 90°C dry-bulb temperature and 20°C wet-bulb depression produced dried boards in the shortest period. The boards indicated no significant color change for practical use. In addition, the dried boards showed durability against brown-rot fungi Fomitopsis palustris and subterranean termites Coptotermes formosanus comparable to naturally dried heartwood boards. The relative contents of cadinols demonstrated negative correlation with weight loss in decay tests. These results may lead to improvement of drying schedules for Japanese cedar boards while retaining natural durability. </p>

Journal

  • Mokuzai Gakkaishi

    Mokuzai Gakkaishi 67 (2), 73-85, 2021-04-25

    The Japan Wood Research Society

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