| 摘要 |
<p>It is intended to provide a method of modifying and coating a surface layer whereby the surface layer of various materials such as wooden materials, inorganic materials or ceramic materials, which are inherently porous but cannot be coated or impregnated with aqueous coatings, aqueous adhesives or the like, can be impregnated with water-soluble organic or inorganic matters to thereby modify the surface layer. The surface of a wooden material is coated with colloidal silica and then hot steam (in particular, steam under the continuous application of heat energy so as to avoid liquefaction into droplets) is brought into contact with the coated surface. Thus, the surface layer is impregnated with the colloidal silica. Owing to this method, the surface layer can be impregnated with the colloidal silica and the solution coated can entirely impregnate without causing any change (for example, moistening the surface or forming a coating film) in the design or form of the surface after the treatment. The surface layer of the wooden material is strengthened, since it is hardened and becomes damage proof owing to the silica incorporated thereinto. Furthermore, multi-functional laminate materials can be obtained by forming a coating film or an adhesive layer thereon.</p> |
