樹液流を利用した材の染色と寸法安定化処理

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  • 樹液流を利用した材の染色と寸法安定化処理(林学部門)
  • ジュエキリュウ オ リヨウシタ ザイ ノ センショク ト スンポウ アンテイカ
  • Dyeing and dimentional stabilization of xylem utilizing the sap flow of freshly-felled trees(Forestry)

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Abstract

For effective utilization of lesser-used species the impregnation of dye aqueous solution and dimensional stability agents to green trees using the sap-flow and transpiration actions of leaves is described. The effect of using different dyes and species on the shape of the dye patterns in the cross section, antishrink efficiency (ASE) and the extent of dyeing in the height of tree (ratio of dyeing areas to cross section) were investigated. The amount of adsorption of the dye aqueous solution differs with dyeing materials and adsorption of four dye aqueous solutions for sugi wood has been shown to decrease in the following order : Malachite green>Methylen blue>Acid fuchusin>Nigroshin. Malachite green aqueous solution was absorbed 96 liters in 17 days by Sugi wood. In the same height of tree the adsorption of dye aqueous solution did not correspond to the extent of dyeing area except Nigroshin and the extent of dyeing areas was maximum inthe Acid fuchusin. The ratio of dyed area to cross section was bigger in the diffuse porous woods than in the ring porous woods : at the 2m height of tree the dyed area of cross section was about 70% for the diffuse porous woods and about 33% for the ring porous woods. The hardwoods showed the characteristic dye patterns in the cross section as shown in Fig.4. Sugi wood showed about 66% ASE up to the 2.8m height of tree. Sugi wood discs could be dried without checking from green to oven-dry state, but the checking was found in hardwoods discs during drying and this treatment did not give enough efficiency for hardwoods.

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