PLEATED FREE-STANDING PACKING BAG, PLEATED FREE-STANDING PACKAGE, MASTER ROLL FOR PLEATED FREE-STANDING PACKAGE, AND METHOD FOR PRODUCING PLEATED FREE-STANDING PACKAGE

摘要

Heat seal performance is enhanced at a portion of a pleated free-standing packaging material where the rib intersects the pleat perpendicularly. Furthermore, free-standing stability of the pleated free-standing packaging material is enhanced by bending the portion where the rib intersects the pleat perpendicularly to provide a sharper acute angle, thus imparting excellent design. The pleated free-standing packaging bag having a principal rafter type ribs in the vertical direction of the packaging bag with the inner surfaces being bonded at the edge of the packaging material where at least one pleat is drawn by folding trebly in a stripe form in the direction perpendicular to the vertical direction of the packaging bag and by bonding the inner surfaces at the folded portion, characterized in that at least a pleat formed at the ridge formed by the folded base portion and the outer circumferential portion is extended from the outer circumferential portion to form the same plane, the base portion and the upper end on the backside of the pleat are formed substantially at a right angle, and a cut is formed at a portion where the pleat intersects the rib.