| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high sheet strength as compared with the number of corrugations of a corrugating medium, and to reduce the occurrence of corrugation cracking or splitting of a corrugating medium paperboard during a corrugation process in the corrugating medium, a corrugated cardboard sheet and the devices for producing them. SOLUTION: The corrugating medium is produced by corrugating a sheet-like raw material using a pair of corrugating rolls, the peripheral surfaces of which are corrugated. In this case, the height of corrugation is set to be 2.5±0.2 mm and also the number of corrugation per 30 cm to be 48±1. COPYRIGHT: (C)2004,JPO
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