06.09.16
Hirotomo Mukai, Kanonji, Japan; and Takaya Arayama, Kanonji, Japan. Assigned to Unicharm Corporation, Ehime, Japan.
Filed: 12/22/11
Issued: 3/1/16
An absorbent layer for a disposable wearing article having a longitudinal direction and a transverse direction orthogonal to the longitudinal direction, and comprising: a front region and a rear region, a first absorbent core formed from at least one of fluff wood pulp and superabsorbent polymer particles, and having transversely extending front and rear end sections and an intermediate section lying between the front and rear end sections, a second absorbent core layered on an upper or lower surface of the first absorbent core, wherein at least the intermediate section of the first absorbent core is formed with a central depression extending in the longitudinal direction, the first absorbent core has a mass per unit area substantially uniform over an entire area thereof, except in a region enclosed by the central depression, the first absorbent core has, on sides of the central depression, high density zones outside the central depression, each high density zone having a density higher than the front and rear end sections, the second absorbent core has a dimension in the longitudinal direction smaller than that of the first absorbent core, an intermediate section of the second absorbent core overlapping the intermediate section of the first absorbent core is narrower than the intermediate section of the first absorbent core, and the central depression of the first absorbent core comprises a wider depression extending in the longitudinal direction and narrower depressions extending on sides of the wider depression as viewed in the transverse direction.
Filed: 12/22/11
Issued: 3/1/16
An absorbent layer for a disposable wearing article having a longitudinal direction and a transverse direction orthogonal to the longitudinal direction, and comprising: a front region and a rear region, a first absorbent core formed from at least one of fluff wood pulp and superabsorbent polymer particles, and having transversely extending front and rear end sections and an intermediate section lying between the front and rear end sections, a second absorbent core layered on an upper or lower surface of the first absorbent core, wherein at least the intermediate section of the first absorbent core is formed with a central depression extending in the longitudinal direction, the first absorbent core has a mass per unit area substantially uniform over an entire area thereof, except in a region enclosed by the central depression, the first absorbent core has, on sides of the central depression, high density zones outside the central depression, each high density zone having a density higher than the front and rear end sections, the second absorbent core has a dimension in the longitudinal direction smaller than that of the first absorbent core, an intermediate section of the second absorbent core overlapping the intermediate section of the first absorbent core is narrower than the intermediate section of the first absorbent core, and the central depression of the first absorbent core comprises a wider depression extending in the longitudinal direction and narrower depressions extending on sides of the wider depression as viewed in the transverse direction.
