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- W174580917 abstract "Inflammable materials like a wood can be use for the fire door by the Ministry of Construction Notice No.1125 in 1990. Wood has good fire endurance when it was made with a large thickness dimension. A door, however, cannot be made with such a large thickness dimension for building purpose, especially in thin panel–stile constructed doors flames the thin panels on fire. In order to improve this behavior, fire retardant wood treated with phosphorus and nitrogen compounds was tested for use in fire doors. Here two treatment methods are compared, which are heat–dried treatment and heat–pressed one. It was recognized that the latter method is more useful than the former method, because density of wood and concentration of chemicals are raised at the surface by the former method and they decrease gradually from the surface to the center. In this system it was recognized that gradient of fire resistance with chemical reactions such as phosphorylation, esterification and polymerization among chemicals and wood occurred on its surface in presence of water. Then laminated boards with surface layers treated this way were used for panels of a wooden fire door and it has been authorized by the Ministry of Construction." @default.
- W174580917 created "2016-06-24" @default.
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- W174580917 date "1997-01-01" @default.
- W174580917 modified "2023-09-25" @default.
- W174580917 title "Development of the fire door with functionally graded wood" @default.
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- W174580917 doi "https://doi.org/10.1016/b978-044482548-3/50121-9" @default.
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