To provide a fire-resistant composite floor material having high strength, excellent not only in lightweight properties and fire resistance but also in processability and capable of preventing the scattering of a gypsum powder by using a gypsum board as a floor material.
A fire-resistant composite floor material is obtained by bonding a reinforcing layer consisting of a thermosetting resin and an inorg. fiber to at least one of the upper and rear surfaces of a gypsum board 3 and forming a coating layer 1 for preventing the scattering of a gypsum powder on the cut end surface 30 of the gypsum board 3. The coating layer 1 is formed, for example, by using an inorg. material such as water glass or the like or an org. material such as a rubbery emulsion.
OGAWA TETSUJI
SATO KENJI
