| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-insulating panel capable of preventing the retention of moisture in the panel and having a heat-insulating property. SOLUTION: The heat-insulating panel is formed by mounting a frame structure 4 formed by fitting boards 2 and 3 on both surfaces of a frame material 1, respectively, and a heat-insulating material 5 disposed inside the frame structure 4. A kenaf-fiber board 6 having a thickness of 1 to 4 mm and molded by bonding an aggregate composed of kenaf fibers obtained by yarn-splitting a kenaf by a thermosetting resin is used as at least one board 2 in the boards 2 and 3 on both surfaces of the frame material 1. The kenaf fibers have fiber lengths of 10 to 200 mm and fiber diameters of 10 to 300μm. Even if the moisture infiltrates into the frame structure 4 by dew condensation or the like. the moisture is permeated as damp and can be discharged by the high moisture permeability of the kenaf-fiber board 6, and the retention of the moisture in the panel can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
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