DOUBLE-FACED CORRUGATED FIBERBOARD SHEET

PROBLEM TO BE SOLVED: To obtain a double-faced corrugated fiberboard sheet which has an excellent compression strength without taking a labor hour in manufacture without changing a basis weight and a material of using base paper. SOLUTION: The double faced corrugated fiberboard sheet satisfies a formula (1): 65°≤θ≤90°, wherein when any of a liner laminating surface of a section of a flowing direction of the sheet is an X-axis, a flute height direction is a Y-axis, and a flute height is h, the θ is the angle formed between a contact line of a corrugating material at Y=h/2. The double-faced corrugated fiberboard sheet also satisfies formulae (2) h/3≤t≤h, and (3) p/6≤t≤p/2, wherein h is the flute height, p is a pitch, and t is a length of a contact part of the flute top of the material and the liner at one pitch in the section of the flowing direction of the sheet. COPYRIGHT: (C)2003,JPO