| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite board material which has excellent fireproof performance and heat insulating performance, which is lightweight by virtue of the small thickness of a board, which reduces noxious-gas yield in case of fire, and which can be recycled as a recyclable material. SOLUTION: In this composite board material, noncombustible material layers 20 are each joined to both sides of a heat insulating layer 10 of foamed rigid urethane; two noncombustible rock wool molded plates 21 are superposed on each other in the layer 20; and surfaces of the molded plates 21 are covered with steel plates 22. COPYRIGHT: (C)2005,JPO&NCIPI
|
