CARDBOARD MATERIAL, CARDBOARD BOX USING SAME, BOX MAKING MATERIAL, BOX MAKING ARTICLE, AND JOINING METHOD

摘要

A cardboard material (1) in which: rectangular sheets (2) of continuous double-sided cardboard are folded back in a second direction MD at folds F that extend in a straight line along a first direction CD; and the sheets (2) are stacked in a third direction TD. The folds of the cardboard material (1) have OK folds of a shape such that the sheet is folded back across only one ridge among a plurality of ridges forming the corrugations of the cardboard.