| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated sheet which is lightweight and shows high longitudinal and crosswise folding strength and can be beautifully decoration- printed and manufactured by a sheet doubler. SOLUTION: This laminated sheet is obtained by laminating a corrugated fiberboard sheet for combination with the number of corrugation crests of not less than 120 per 30 cm and the corrugation height of not more than 0.6 mm and a corrugated fiberboard sheet to be combined with the corrugation height of at least not less than 1 mm in the way that the row of corrugations of both corrugated fiberboard sheets are orthogonal with each other. COPYRIGHT: (C)2004,JPO
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