| 摘要 |
Corrugated cardboard plates are made by laminating and bonding corrugated cardboards 1, each including a corrugated sheet 1a and at least one liner sheet 1b bonded to the corrugated sheet 1a, to provide a corrugated cardboard laminate 5, which is in turn cut along a plurality of cutting lines b lying perpendicular to a direction parallel to ridge lines a of the corrugated sheet 1a to provide a plurality of corrugated blocks 7. The corrugated blocks 7 are then arrayed in a line to provide an elongated flat corrugated plank 9 in which the top face of one of the corrugated blocks 7 is bonded to the bottom face of the next adjoining corrugated block 7. At least one backing sheet 11a or 11b, made of paper, to one of opposite surfaces of the elongated flat corrugated plank 9 and is subsequently cut into a plurality of corrugated cardboard plates 14 of a predetermined size. In this way, the corrugated cardboard plates 14 or 90 can be obtained at a reduced cost, each of the plates 14 or 90 having an excellent heat insulation, a sound insulation and being lightweight and robust.
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