To provide a composite board and its production method which can curtail a production time and stabilize quality.
The composite board 10 is produced through a process (a) for producing a mixed material 16 by dry-mixing a wood material 12 and a plastic material 14, a process (b) for molding a forming mat 18a by dry-forming the mixed material 16, a process (c) for molding a single layer board 18b by hot-pressing the forming mat 18a, a process (d) for laminating a lamination material 20b on the surface of the single layer board 18b, and a process (e) for integrating the single layer board 18b and the lamination material 20b by hot-pressing before the single layer board 18b is cooled. Even when the wall thickness is thick, a time necessary for the hot-pressing in the process (e) can be curtailed, the total production time can be curtailed, and the occurrence of burning in the surface of the composite board can be prevented.
TANAKA TAKUJI