| 摘要 |
<p>PURPOSE:To prevent an inner pressure from increasing by sheathing, with a housing agent, a core material consisting of hard urethane foam of continuous foaming structure, high molecular compound which has carboxyl group or hydroxyl group in a molecular structure as an absorption substance, and an absorption element including a carbon oxide absorption agent. CONSTITUTION:This heat insulating element 1 sheathes hard urethane foam 2 of continuous foam structure and an absorption element 4 with a sheathing agent 3 consisting of metallic plastic and depresses and seals its inside. In the absorption element 4, activated carbon is added as an organic gas absorption substance, silica alumina compound is added as a carbon oxide absorption substance, and organic compound which has carboxyl group or hydroxyl group as an oxygen absorption substance. The absorption element 4 is charged in a bag 5 consisting of polyproplylene unwoven paper in advance. It is thus possible to ensure long-term heat insulation for preventing inner pressure from increasing by selectively-absorbing oxygen gas which enters from the outside.</p> |
