抄録
A new method was designed to improve the liquid penetration in wood using the precompression treatment, and the effects of compressive deformation and its recovery on uptake of liquid solution were evaluted with respects to the deformation levels and the dimensions of specimen-size. The employment of the precompression treatment under the moisture and heat conditions effectively enabled the increase of liquid penetration of refractory wood species of the practical size.
Results obtained were as follows:
1) Liquid penetration increased with the increase of the precompressive ratio for the Karamatsu (Larix Leptolepsis Goldon) heartwood, and the amount of liquid uptake for the precompressed wood (42% of compression ratio) demonstrated nine times as much as value of uncompressed wood.
2) The treated wood with 40-50% of precompression ratio showed the peculiar character of in- creasing liquid uptake with the increase of specimen thickness when the amount was expressed in value relative to volume or surface area.
3) The liquid penetration of the precompressed wood specimen decreased with the increase of specimen length in the case of the free penetration. However, the value was hold constant at the high level when the pressure impregnation method was conducted. It was expected that even the long wood specimens were effectively penetrated with liquid solution when the precompression treatment was employed followed with the pressure impregnation.
