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| PDF : |  21090525.pdf |
| title(En) : | Preservative Treatments for Structural Plywoods of Seraya Woods by Pressure, Dipping and Coating Processes |
| author(En) : | Kyoji Minami, Yoshihisa Kenjo, Shingo Sugiyama |
| information : | Mokuzai Gakkaishi 21(9), 525-531 (1975) |
| assort : | Note |
| summary(En) : | Structural plywoods composed of face veneers of red seraya and core veneers of white seraya, were treated with 2 % Wolman salt solution by pressure, dipping and coating processes. Untreated and treated specimens were subjected to decay durability test by soil-block method, with or without preliminary weathering, against two fungi-Coriolus versicolor and Tyromyces palustris, estimating resistance to decay on weight and compression strength. The specimens of face veneers of fiber direction at 0° and 90°, treated with pressure process or with dipping process without weathering, showed satisfactory durability to decay. Concerning the kinds of fungi, in the correlation of the reduction of weight with the residual compression strength, the reduction of residual compression strength brought about with Tyromyces palustris was more remarkable than that brought about with Coriolus versicolor in the case of the equal reduction of weight over 6-8 % of weight loss. In the case of untreated original plywood, the decay of core veneers progressed more rapidly than that of face veneers: it is possible to attribute it to the difference of decay durability of both wood species of veneers. |