| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a flame-retardant treatment method for a wood material capable of inexpensively producing a wood material having fire retardancy and also suppressing an efflorescence phenomenon of its surface. <P>SOLUTION: The method includes: an injection step of injecting the wood material with an acid aqueous solution in which a fire retardant is contained and further a phosphate, a magnesium and an ammonium components, which are not combined and deposited, and are in an ionic state, are present in the solution; and after the injection step, a formation step of bringing the wood material into contact with an alkaline aqueous solution to form a poor solubility substance having phosphate, magnesium and ammonium as principal components on the surface of the wood material and/or inside the wood material. Further, between the injection step and the formation step, it is preferable to include a drying step of drying the surface of the wood material. In the formation step, it is preferable to form the poor solubility substance having phosphate, magnesium and ammonium as the principal components on the surface of the wood material and/or inside the wood material, and also to form an insoluble material of a polymer agent. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
