| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire resistant building material capable of passing a 60 min fire resistance test and being mass-producible. Ž<P>SOLUTION: This 60 min heatproof building material is composed of a core material (a) made of (a-1) a composite resin sheet constituted by heating, compressing, and molding composite chips comprising 85-70 wt.% of a hydration metal compound and 15-30 wt.% of a thermoplastic resin or (a-2) a composite mortar sheet formed by mixing the composite chips comprising 85-70 wt.% of the hydration metal compound and 15-30 wt.% of the thermoplastic resin with a wall material such as cement or gypsum or the like, an intermediate layer (b) composed of fiber nets provided on both surfaces of the core material and nipping and holding the core material, and an outer layer (c) composed of an inorganic fire resistant layer formed by the cement or the gypsum composition formed on one surface or both surfaces of the core matrial through the fiber nets. This heatproof building material has the physical properties causing no weight loss of 30% or more in a noncombustibility test and no collapse due to burning of the core material in the 60 min fire resistance test. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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