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U.S. Patent No. 9,173,781 B2
December 1, 2015
By: Tara Olivo
Associate Editor at Nonwovens Industry
Toshifumi Otsubo, Kanonji, Japan; Tatsuya Hashimoto, Kanonji, Japan; Mariko Yamashita, Kanonji, Japan; Etsuko Kudo, Kanonji, Japan; and Akiko Tange, Kanonji, Japan. Assigned to Unicharm Corporation, Ehime, Japan. Filed: 1/6/11 Issued: 11/3/15 A disposable wearing article having a longitudinal direction, a transverse direction, and a thickness direction, said disposable wearing article comprising: a chassis comprising a side adapted to face a wearer’s body, a side adapted to face away from the wearer’s body, a first waist region which is one of front and rear waist regions, a second waist region which is the other of the front and rear waist regions, and a crotch region extending between the first and second waist regions; waist elastic elements configured to contractibly elasticize the first and second waist regions in the transverse direction; and leg elastic elements configured to contractibly elasticize the crotch region in the longitudinal direction, wherein the first and second waist regions are joined together along respective opposite side edges thereof to form lines of side seams having a stiffness higher than a remaining region of the first and second waist regions and to form a waist-opening and a pair of leg-openings, the leg elastic elements are formed of elasticized sheets each having opposite ends at least one of which overlaps associated one of the opposite side edges and having a stiffness higher than the remaining region, a contractile force of the waist elastic elements is greater than that of the leg elastic elements so that sections of the first and second waist regions adjacent the crotch region and overlapping the leg elastic elements are broadened outward in the transverse direction, the waist elastic elements comprise first waist elastic yarns or threads formed of elastomeric elastic yarns or threads attached along the waist-opening; and waist elastic sheets arranged closer to the crotch region than the first waist elastic yarns or threads and formed of elasticized sheets, the waist elastic sheet arranged in the front waist region overlaps the leg elastic elements in the thickness direction, and the waist elastic sheet arranged in the rear waist region is located in the longitudinal direction between (i) the first waist elastic yarns or threads and (ii) the leg elastic elements, without overlapping the leg elastic elements in the thickness direction.
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