| 摘要 |
<p>PURPOSE:To provide a heat insulative body easy manufacturable and having a high order of heat insulativeness by impregnating a rock wool with organic binder, tirning it into a plate with a specific pressure, and turning the organic binder into pyrolyzed gas. CONSTITUTION:A vessel is provided having a heat insulative wall 1, and the front and rear surfaces of a plate consisting of rock wool are impregnated with a resin, for example phenol resin. The resultant in the form of a mat impregnated is compressed with a pressurizing force over 2kgf/cm<2>, hardened by compaction press into a density of 0.4-0.7g/cm<3>, and turned into a plate 2A. This plate 2A is inserted into the wall 1 provided with an opening 3, which is blocked by welding after the inside is filled densely. The vessel obtained is put in a baking furnace 4 and heated at 400 deg.C for 1.5hr, and the phenol resin is baked and gasified, and after the gas is exhausted by suction, the inside of the insulative space is evacuated to under 0.1Torr. Thereby a heat insulated vessel is easily produced which excels in the heat insulativeness.</p> |
