| 摘要 |
A method for forming a solidified granular material ( 15 ), in which granules ( 16, 17 ) are charged into a tubular frame member ( 11 ) and then heated together with the frame member, to solidify the granules. The granules include a mixture of first granules ( 16 ) and second granules ( 17 ), each of which second granules has a thermoplastic resin shell enclosing a solid or liquid which expands by vaporization. The mixture is charged into the frame member and heated together with the frame member. The heating causes the second granules ( 17 ) to expand and the surfaces of the second granules to melt for bonding with the first granules ( 16 ). The mixture, upon cooling, becomes a solidified granular material ( 15 ), filling the frame member with no space therebetween.
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