| 摘要 |
PROBLEM TO BE SOLVED: To enable a tatami mat to sufficiently cope even with a current dwelling environment, in which high airtightness of a dwelling house progresses, by exerting a moisture absorption/desorption effect, which is possessed by the tatami mat itself, to the utmost.SOLUTION: A porous corrugated sheet 5 is made by alternately forming many ridgeline parts 3 and many valley-line parts 4 on a porous plate with many vent holes 1 in many rows in parallel and at equal heights, and a nonelastic permeable nonwoven fabric 6 is superposed on the respective multi-row ridgeline parts 3 of the porous corrugated sheet 5 and fixed in a stretched state. Thus, a corrugated porous permeable material 9, which makes the permeable nonwoven fabric 6 inhibit expansion of the respective multi-row ridgeline parts 3 subjected to a normal under-tatami-mat load, is configured, and a tatami mat 11 is laid by interposing the corrugated porous permeable material 9 between a floor surface and the backside 12 of the tatami mat. |
