| 摘要 |
PROBLEM TO BE SOLVED: To provide such a method for manufacturing a heat insulator as is capable of manufacturing efficiently a lightweight heat insulator by using a silica-based waste, and to provide a heat insulator which is manufactured by this manufacturing method for a heat insulator and which has a low cost and a high heat-insulation efficiency. SOLUTION: The method comprises blending (a) a silica-based material, (b) a calcium-based material and (c) water with (d) a foaming material which produces carbon dioxide when blended with a silica-based material, a calcium-based material and water in a predetermined ratio, kneading it, then expanding the blended raw material, thereafter charging the expanded blended raw material into a given frame, and then drying and solidifying the in-frame blended raw material. The penetrating of a water-soluble silica aqueous solution into the heat insulator of the molded body, in which the in-frame blended raw material has been dried and solidified, allows to react the calcium component and the silica in the heat insulator molded body to thereby improve the mechanical strength. COPYRIGHT: (C)2006,JPO&NCIPI
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