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A composition and method for producing a fiberboard. The fiberboard is produced from a mixture of wood-containing material, a binder, a waterproofing agent and a liquid concentrate. The liquid concentrate contains boric acid or a derivative thereof, a water soluble compound which includes an alcohol

A composition and method for producing a fiberboard. The fiberboard is produced from a mixture of wood-containing material, a binder, a waterproofing agent and a liquid concentrate. The liquid concentrate contains boric acid or a derivative thereof, a water soluble compound which includes an alcohol and a water soluble amine-containing compound, and optionally water. The mixture is intermixed and subsequently pressed at a predetermined compacting pressure and a predetermined temperature.

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A formaldehyde resin bonded fiberboard having a reduced tendency to release formaldehyde, produced by a process comprising the steps of: (1) producing a mixture comprising: 100 parts by weight of a particulate material; from about 4 to about 30 parts by weight of a glue bath containing from about 35

A formaldehyde resin bonded fiberboard having a reduced tendency to release formaldehyde, produced by a process comprising the steps of: (1) producing a mixture comprising: 100 parts by weight of a particulate material; from about 4 to about 30 parts by weight of a glue bath containing from about 35% to about 65% by weight on a dry weight basis of a formaldehyde-containing synthetic resin binder selected from the group consisting of urea-formaldehyde resin, melamine-urea-formaldehyde resin, and mixtures of at least one of the aforementioned resins with isocyanate, alone or in combination with tannin resins; and from about 0.5 to about 5 parts by weight of a liquid concentrate, said liquid concentrate comprising: from about 50 to about 80 parts by weight of a compound selected from the group consisting of boric acid, an aqueous solution of a boric acid-forming compound, an alkaline borate, and a mixture thereof; from about 50 to about 20 parts by weight of a water soluble component comprising (1) a mixture of at least one alcohol and at least one amine selected from the group consisting of an aliphatic amine and a polyamine, (2) an alkoxyamine or an alkanolamine, or (3) a mixture thereof; and from about 0 to about 50 parts by weight water; (2) preforming a mat from said mixture; and (3) pressing said mat into a fiberboard using a compaction pressure of from about 12 to about 40 dN/cm2 and a temperature of from about 140°C. to about 200°C. in a pressing step having a duration of from about 0.08 to about 2 minutes per millimeter of board thickness.