| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the leakage of scraps broken to small pieces in using a pillow while realizing their excellent characteristics as the pillow by using the natural stones. SOLUTION: This pillow is formed by packing the natural stones 2 which are rhyolite or sandstones having numerous fine gaps crushed to grain sizes of an average grain size of 1 to 10 mm and are sintered in an oxidation atmosphere of 700 to 1,300 deg.C into a bag sheet 1 having flexibility and air permeability.
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