| 摘要 |
Provided are: a vacuum thermal insulating material with which machining such as drilling and recess machining can be stably performed, for which the ease of work during manufacturing is favorable, and surface flatness has been maintained; and a manufacturing method therefor. A vacuum thermal insulating material is provided with: an outer covering material obtained by disposing a gas-tight film with a thermal welding layer on one surface so that the thermal welding layers face each other; a sheet-shaped core material with a lacuna that penetrates in the sheet thickness direction; and a replacement material, which is disposed in the lacuna so as to occlude the lacuna and has a gas-tight resin member with a pair of surfaces that are roughly parallel to the main surface of the core material. In the vacuum thermal insulating material in which the interior of the outer covering material is in a reduced pressure state, the core material in which said replacement material has been disposed is held within the outer covering material, and the region that is located outside the perimeter of the core material and entirely surrounds the core material is bonded tightly by thermal welding of the thermal welding layers to each other. The resin member is bonded with the outer covering material so as to maintain gas-tightness. |
