| 摘要 |
PROBLEM TO BE SOLVED: To obtain a microflute corrugated fiberboard sheet not reducing a compressing strength of a case in the case of case manufacturing from the corrugated fiberboard sheet by enabling direct printing of the sheet having a height of a flute of the corrugated fiberboard sheet of 1 mm or less and eliminating a registering fault at multicolor printing time. SOLUTION: The corrugated fiberboard sheet for printing is obtained by drawing, for example, the corrugated fiberboard sheet in between upper and lower pressure rolls by using a suitable pressurizing means before printing the overall surface of a double faced corrugated fiberboard sheet having the height of the flute of 1.0 mm or less, a number of flutes per 30 cm of 90 or more, thereby compressing the fiberboard sheet in a thickness direction. The method for manufacturing the corrugated fiberboard sheet is provided.
|
