Patent ID: 8979816
Filing Date: 2015-03-17
Classification: A61F

Abstract:
1. A disposable wearing article having a longitudinal direction and a transverse direction, the article comprising: a skin-contacting side; a garment-contacting side opposite to the skin-contacting side; a chassis including a front waist region, a rear waist region and a crotch region extending between the front and rear waist regions; an absorbent structure lying at least in the crotch region; a waist-opening defined by front and rear ends of the chassis; and leg-openings defined by lateral edges of the chassis, wherein a plurality of front and rear waist elastics extending in the transverse direction and spaced apart from each other in the longitudinal direction are contractibly attached under tension to the front and rear waist regions, wherein: the chassis includes a plurality of sheets layered upon one another; at least one of the front and rear waist regions is formed with a variable stiffness region including a low stiffness sub-region extending in the transverse direction and a pair of high stiffness sub-regions adjacent to both sides of the low stiffness sub-region in the longitudinal direction, wherein the variable stiffness region is bordered by a pair of the waist elastics in the corresponding waist region; and the chassis comprises an inner sheet lying on the skin-contacting side, an outer sheet lying on the garment-contacting side and a waist-opening sheet adapted to define the waist-opening in said at least one of the front and rear waist regions; the waist-opening sheet comprises a first sheet segment lying on the garment-contacting side, a second sheet segment lying on the skin-contacting side and a boundary lying between the first and second sheet segments so as to coincide with the waist-opening; the first sheet segment overlaps both the inner sheet and the outer sheet, the second sheet segment overlaps the inner sheet, and the second sheet segment and the outer sheet are arranged so as to be spaced apart from each other in the longitudinal direction; and the low stiffness sub-region is defined by a region in which the second sheet segment and the outer sheet are spaced apart from each other, and the respective high stiffness regions are defined by a region in which the first sheet segment, the second sheet segment and the inner sheet are overlapped and by a region in which the first sheet segment, the outer sheet and the inner sheet are overlapped, such that the number of the sheets overlapped to form the low stiffness sub-region is fewer than the number of the sheets to form the respective high stiffness sub-regions.