Patent ID: 7976900

Claim:
A method of producing a fire-retardant flat structural member configured as a composite body comprising the steps of: providing at least two veneer sheets and an intermediate layer of a core material located therebetween to provide the composite body; disposing a resin film between the intermediate layer of the core material and the respective veneer sheet on each side of the intermediate layer, the veneer sheets having pores; and supplying heat to the veneer sheets such that (i) water bound in the pores of the veneer sheets evaporates and is exhausted from the pores thereof and (ii) the resin films are liquefied by the heat, the exhausting evaporated water drawing the liquefied resin films into the pores of the veneer sheets by capillary action, the step of heating being effected under an applied pressure such that the evaporated water exhausted from the pores flows out through edges of the member.