簡易予測式による段ボールの反り変形評価

概要

論文の詳細を見る
Demand for corrugated flberboard for use in multi purpose packing materials has grown recently, and the requirements for mechanical precision and strength are becoming more stringent. Because corrugated fiberboard is composed of a top liner, a bottom one and a wavy-shaped medium liner, the warping deformation depends on the difference in the fiber orientation and the expansivity between top and bottom liners. To prevent the warping deformation of corrugated fiberboards, it is necessary to formularize the warping deformation and elucidate the mechanism of warping. In this study, a prediction equation of warping deformation for corrugated fiberboards is derived from the lamination theory, and the mechanism of the warping deformations is investigated. The relationship between the warping and the parameters influencing the warping has been elucidated by a simple prediction equation, and prediction of the warping deformation is made possible. Twisting warping is closely connected with the difference in the fiber orientation angle between the top liner and bottom liner, and increases with fiber orientation angle. The bending warping and twisting warping increase with the anisotropy ratio of Young's modulus and the anisotropy ratio of the expansivity, and the increased ratio of bending warping in the machine direction (MD) is larger than that in the cross direction (CD).
社団法人日本機械学会の論文
1993-01-25