The ligneous type interior facing null flooring which possesses

摘要

PROBLEM TO BE SOLVED: To provide a woody interior-finishing material displaying an excellent radio absorptive performance while having the radio absorptive performance being capable of being directly used as the interior-finishing material.;SOLUTION: The woody interior-finishing material is used under the state in which a surface is exposed in a flooring, a spandrel wall, a panelling board, a decorative wall panel, a ceiling board or the like. In the woody interior-finishing material, each layer of a surface facing-material layer 1, an absorbing layer 2, a spacer layer 3 and a reflecting layer 4 is integrally laminated successively from the indoor side, and at least the spacer layer 3 is formed of a woody material. Radio absorptive characteristics are determined previously by changing the thickness of the spacer layer 3 to the frequency of a radio wave under the state in which the surface facing-material layer 1, the absorbing layer 2 and the reflecting layer 4 are kept constant. The thickness of the spacer layer 3 is determined in the thickness capable of bringing the absorption of the frequency of the radio wave as an object to a specified dB or more on the basis of the radio absorptive characteristics.;COPYRIGHT: (C)2006,JPO&NCIPI