| 摘要 |
PROBLEM TO BE SOLVED: To reuse a corrugated fiberboard box as a returnable box used for transportation by avoiding applying a packing kraft tape directly to the fiberboard box. SOLUTION: A corrugated fiberboard box is not endowed with the function as a returnable box, so that the surface of the box is broken by the tape when it is opened. The corrugated fiberboard box can be folded without damaging it by suitably applying a pressure-sensitive adhesive sheet provided with elastic protrusions to it, sealing it with a packing tape, and peeling only the kraft tape when opened. Further, the pressure-sensitive adhesive sheet provides a repeatedly usable releasable pressure-sensitive adhesive sheet to or from which an invoice, a seal, or a label can be easily stuck or peeled.
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