Abstract: Provided is a multi-layered reinforced wood material which is excellent in fire resistance, has extremely small damages on a support wood material part, and is also excellent in strength. The present invention is directed to a multi-layered reinforced wood material A for use as a building material, the multi-layered reinforced wood material A including a support wood material part 1 for supporting load, a sheet part 3 attached to the periphery of the support wood material part 1, an inflammable wood material part 2 attached outside the sheet part 3 so as not to expose the sheet part 3, wherein the inflammable wood material part 1 is made of a wood material containing therein an inflammable agent, and the sheet part 3 is made of a fiber reinforced plastic.

Abstract: A multi-layered inflammable wood material A for use as a building material includes a support wood material part 1 for supporting load, an inner inflammable wood material part 2a attached to a periphery of the support wood material part 1, and an outer inflammable wood material part 2b attached to a periphery of the inner inflammable wood material part 2a, wherein the inner inflammable wood material part 2a and the outer inflammable wood material part 2b both contain therein an inflammable agent, and an amount of the inflammable agent contained in the inner inflammable wood material part 2a is smaller than an amount of the inflammable agent contained in the outer inflammable wood material part 2b.

Abstract: Provided is a multi-layered reinforced wood material which is excellent in fire resistance, has extremely small damages on a support wood material part, and is also excellent in strength. The present invention is directed to a multi-layered reinforced wood material A for use as a building material, the multi-layered reinforced wood material A including a support wood material part 1 for supporting load, a sheet part 3 attached to the periphery of the support wood material part 1, an inflammable wood material part 2 attached outside the sheet part 3 so as not to expose the sheet part 3, wherein the inflammable wood material part 1 is made of a wood material containing therein an inflammable agent, and the sheet part 3 is made of a fiber reinforced plastic.

Abstract: A multi-layered inflammable wood material A for use as a building material includes a support wood material part 1 for supporting load, an inner inflammable wood material part 2a attached to a periphery of the support wood material part 1, and an outer inflammable wood material part 2b attached to a periphery of the inner inflammable wood material part 2a, wherein the inner inflammable wood material part 2a and the outer inflammable wood material part 2b both contain therein an inflammable agent, and an amount of the inflammable agent contained in the inner inflammable wood material part 2a is smaller than an amount of the inflammable agent contained in the outer inflammable wood material part 2b.

Abstract: Provided is a method of manufacturing incombustible wood that enables maximization of the amount of an incombustion agent used to be impregnated into wood. Further provided is a method of manufacturing incombustible wood that completely satisfies incombustible-wood conditions required by the Building Standard law and that can be relatively easily manufactured. The method of manufacturing incombustible wood includes performing plural times of individual drying steps for drying wood (for example, board material B), decompression steps for decompressing the wood, decompression impregnation steps for impregnating the wood with an incombustibility treatment agent in a decompressed state, and compression impregnation steps for impregnating the wood with the incombustibility treatment agent in a compressed state, wherein two times of the individual decompression steps, individual decompression impregnation steps, and compression impregnation steps are performed, and three times of the drying steps are performed.

Abstract: A fire-proof treatment solution capable of resolving problems, such as low solubility leading to low concentration and hence low combustion inhibiting effect and water solubility leading to a disadvantage of eluviation, of boron compounds used as a constituent of a flame-retarding treatment solution. In particular, a fire-proof treatment solution produced by adding phosphoric acid and a silane coupling agent to a weak acid or weak alkali aqueous metal salt solution containing a boron compound to thereby obtain a mixed aqueous solution and adding a plant extract composed mainly of a polyphenol compound to the mixed aqueous solution. This fire-proof treatment solution can be widely applied to members composed mainly of cellulose, such as wood, paper and natural fibers. This fire-proof treatment solution can increase the fixation of chemicals to thereby attain a high combustion inhibiting effect and can minimize the occurrence of eluviation.

Abstract: A fire proof treatment solution capable of resolving problems, such as low solubility leading to low concentration and hence low combustion inhibiting effect and water solubility leading to a disadvantage of eluviation, of boron compounds used as a constituent of flame retarding treatment solution. In particular, a fire proof treatment solution produced by adding phosphoric acid and a silane coupling agent to a weak acid or weak alkali aqueous metal salt solution containing a boron compound to thereby obtain a mixed aqueous solution and adding a plant extract composed mainly of a polyphenol compound to the mixed aqueous solution. This fire proof treatment solution can be widely applied to members composed mainly of cellulose, such as wood, paper and natural fibers. This fire proof treatment solution can increase the fixation of chemicals to thereby attain a high combustion inhibiting effect and can minimize the occurrence of eluviation.

Abstract: Provided is a method of manufacturing incombustible wood that enables maximization of the amount of an incombustion agent used to be impregnated into wood. Further provided is a method of manufacturing incombustible wood that completely satisfies incombustible-wood conditions required by the Building Standard law and that can be relatively easily manufactured. The method of manufacturing incombustible wood includes performing plural times of individual drying steps for drying wood (for example, board material B), decompression steps for decompressing the wood, decompression impregnation steps for impregnating the wood with an incombustibility treatment agent in a decompressed state, and compression impregnation steps for impregnating the wood with the incombustibility treatment agent in a compressed state, wherein two times of the individual decompression steps, individual decompression impregnation steps, and compression impregnation steps are performed, and three times of the drying steps are performed.