Patent ID: 8297013

Claim:
A fireproof resin sash, which comprises synthetic resin members that are composed of vertical and lateral frame members and vertical and lateral rail members, the synthetic resin members each having a plurality of hollows along the longitudinal directions thereof and which supports fireproof plate members, wherein fireproof sheets are inserted into selected hollows of the rail members and disposed in the hollows so that a broad surface corresponding to a long side of the cross-section thereof is in the direction along the broad surfaces of the plate members, said fireproof sheets being made up of a metallic member bonded together with thermally expandable fireproof material, and the fireproof sheets are inserted into hollows while leaving a space therein, wherein when the fireproof resin sash is heated, the thermally expandable fireproof material expands in volume and forms fireproof heat insulating layers without gaps, and the thermally expandable fireproof material is formed with a resin composition material comprising 10 to 300 parts by weight of thermally expandable graphite, 30 to 400 parts by weight of inorganic filler and metal carbonates, and 30 to 300 parts by weight of ammonium polyphosphate, wherein the sum of the thermally expandable graphite, the inorganic filler and metal carbonates, and the ammonium polyphosphate is 70 to 500 parts by weight, with respect to 100 parts by weight of a resin component.