Assignors: Takaya Arayama, Kagawa, Japan; and Hirotomo Mukai, Kagawa, Japan. Assigned to Unicharm Corporation, Ehime-Ken, Japan.
Filed: 2/25/11
Issued: 9/29/15

A disposable wearing article, comprising: an absorber having a lengthwise direction; a widthwise direction which is orthogonal to the lengthwise direction; an inward direction which is configured to be oriented toward a wearer; and an outer direction which is oriented to a side opposite to the inward direction, the absorber including a water absorbent polymer, wherein the absorber has, in a crotch portion region configured to be applied to a crotch portion of the wearer, a central portion formed at a central part of the absorber in the widthwise direction, a pair of side edge portions including a side edge of the absorber in the widthwise direction, and a pair of middle portions positioned between the central portion and the side edge portions, at the central portion, a central curve forming portion is formed along the lengthwise direction so as to cause the absorber to be curved and convex in the inward direction in use, and the central curve forming portion comprises a central slit formed at the absorber along the lengthwise direction, at each of the middle portions, a side curve forming portion is formed along the lengthwise direction so as to cause the absorber to be curved and convex in the outward direction in use, and the side curve forming portion comprises a side slit formed at the absorber along the lengthwise direction, an average basis weight of the water absorbent polymer at the central portion is smaller than an average basis weight of the water absorbent polymer at the middle portions, an average basis weight of the water absorbent polymer at the side edge portions is smaller than the average basis weight of the water absorbent polymer at the middle portions, each of the middle portions is formed from a position corresponding to, in the widthwise direction, a half of a distance between a center of the central slit and a center of the respective side slit to a position corresponding to, in the widthwise direction, a half of a distance between the respective side slit and a respective side edge of the absorber, each of the middle portions includes an outside middle portion extending, in the widthwise direction, from the respective side curve forming portion to a boundary with the respective side edge portion, the average basis weight of the water absorbent polymer at the side edge portions is smaller than an average basis weight of the water absorbent polymer at the outside middle portions, the absorber has a first layer and a second layer which are superimposed on one another, the central portion and the side edge portions are formed by the second layer but not by the first layer, and the middle portions are formed by both the first layer and the second layer.