| 摘要 |
PROBLEM TO BE SOLVED: To reliably attain an automatic water barrier action when damage such as boring occurs. SOLUTION: A powder/grain-like highly-hygroscopic polymer material 3 is filled between a pair of nonwoven fabrics 1, 2 at the density of 200-3000 g/m2, and fibers 5 are inserted from one nonwoven fabric to the outer face of the other nonwoven fabric at intermittent positions in the planar direction of a pair of nonwoven fabrics 1, 2 to connect them together. Resin layers 4 are applied to the outer faces of the nonwoven fabrics 1, 2 to stick and fix the terminals of the fibers 5 protruded on the outer faces of the nonwoven fabrics 1, 2.
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