| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a paperboard wherein any wastepaper can be eficiently utilized when the paperboard is to be produced and problems on environment, energy and protection of forests can be solved and the paperboard can be inexpensively produced and it can be safely used in the field of everyday life. SOLUTION: A flat sheet-like paperboard 2 is produced by a method wherein a number of wastepapers 1 of the same kind are bonded together to form core bodies 7 with an area and a thickness in accordance with a purpose for use and other papers 8 are covered and stuck on the top face and the underside of the cor body 7 and a corrugated paperboard is produced by applying a V-shaped or U-shaped corrugate treatment on this flat sheet-like corrugated paperboard 2 and in addition, a corrugated board-like paperboard is produced by sticking the flat sheet-like paperboard on the top face and the underside of the corrugated paperboard.
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