段ボールの多溝罫線の折り曲げ性能

抄録

Recently, the difference of flap opening/closing resistance of container boxes becomes one of severe problems for workers in various packaging industries. This kind of opening/closing resistance is desired to be even or at least similar in the both moving directions. In this recent situation, a new processing method is desired for performing the evenness of closing/opening resistance of the scored lines of container boxes. Currently used corrugated fiberboard is easy to bend in a single direction by score line processing. Therefore, we expect improvement of bending characteristics by changing the condition of score line processing. In this paper describes the bending moment resistance of scored portion of corrugated fiberboard (Cfb) and the corresponded bulging behavior of scored portion. In order to reveal the folding mechanism of scored Cfb using one-point type and three-point type die-set when varying the indentation depth of attacker bite, two kinds of prototype die-set were developed and the folding process was investigated using the folding test apparatus. The difference of one-point type and three-point type scoring was revealed as the characteristics of bending moment resistance of scored Cfb and the occurrence limit of failure modes of folding with respect to the folding direction.