DISPOSABLE WEARING ARTICLE

• US 20140378935A1
• Filed: 09/05/2012
• Published: 12/25/2014
• Est. Priority Date: 09/07/2011
• Status: Active Grant

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Arayama, Takaya, Mukai, Hirotomo
• Granted Patent: US 9,801,764 B2
• Time in Patent Office: Days
• US Class Current: 604/385.101
• CPC Class Codes: A61F 13/49001 having preferential bending zones, e.g. fold lines or grooves
• CPC Class Codes: A61F 13/494 characterised by edge leakage prevention means
• CPC Class Codes: A61F 13/532 inhomogeneous in the plane of the pad
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence

Abstract

A disposable wearing article includes a urination region to be in contact with a urination unit of the wearer, a buttocks region to be in contact with buttocks of the wearer, and an absorbent sheet which includes an absorbent polymer sandwiched between liquid-impermeable layers. The absorbent sheet is disposed in the buttocks region but not in the urination region.

Claims

1. A disposable wearing article, comprising:

a liquid-permeable topsheet;

a backsheet;

an absorber disposed between the topsheet and the backsheet, the absorber having a longitudinal direction, a widthwise direction orthogonal to the longitudinal direction, an inner direction for facing a wearer, and an outer direction opposite to the inner direction;

a urination region, which is adapted to be in contact with a urination unit of the wearer;

a buttocks region, which is disposed rearwardly of the urination region and is adapted to be in contact with buttocks of the wearer; and

an absorbent sheet which includes an absorbent polymer sandwiched between liquid-impermeable layers and is provided between the topsheet and the absorber;

wherein

a curving unit is formed in at least the urination region for causing the absorber to curve convexly in the inner direction; and

the absorbent sheet is disposed in the buttocks region, but not in the urination region.

3. The disposable wearing article according to claim 1, wherein the curving unit comprises at least one selected from the group consisting of:

a slit formed in the absorber;

a low basis weight region in the absorber, and having a lower basis weight than a surrounding region; and

a compressed region of the absorber.

4. The disposable wearing article according to claim 1, wherein

the curving unit is disposed along the longitudinal direction, and

the curving unit comprises a curving unit stretchable member which is stretchable in the longitudinal direction.

5. The disposable wearing article according to claim 1, wherein the buttocks region includes a buttocks stretchable member which is stretchable in at least the longitudinal direction.

6. The disposable wearing article according to claim 5, wherein the buttocks stretchable member includes a pair of leg-holes stretchable members adapted to be disposed around the legs of the wearer.

7. The disposable wearing article according to claim, 1, wherein the buttocks region includes a waistline elastic member which is adapted to be disposed around the waist of the wearer and is stretchable in the widthwise direction.

8. The disposable wearing article according to claim 1, wherein

the buttocks region includes a plurality of polymer containing regions in which the absorbent polymer is disposed, and a polymer non-containing region where the absorbent polymer is not disposed;

and

the polymer non-containing region is provided between the adjacent polymer containing regions.

9. The disposable wearing article according to claim 1, wherein the curving unit is further formed in the buttocks region.

10. The disposable wearing article according to claim 5, wherein the buttocks stretchable member is further stretchable in the widthwise direction.

11. The disposable wearing article according to claim 9, wherein the polymer containing regions define a V-shape where the apex is directed rearwardly in the longitudinal direction.

12. The disposable wearing article according to claim 4, wherein the curving unit is configured to have a central aperture and the curving unit stretchable member,

the central aperture is formed in the center in the widthwise direction in the absorber, and

the curving unit stretchable member is arranged so as to overlap on the central aperture in the thickness direction of the disposable wearing article.

2. A disposable wearing article, comprising:

a liquid-permeable topsheet;

a backsheet;

an absorber disposed between the topsheet and the backsheet, the absorber having a longitudinal direction, a widthwise direction orthogonal to the longitudinal direction, an inner direction for facing a wearer, and an outer direction opposite to the inner direction;

a urination region, which is adapted to be in contact with a urination unit of the wearer;

a buttocks region, which is disposed rearwardly of the urination region and is adapted to be in contact with buttocks of the wearer, wherein the absorber has a first region having

an absorbent polymer, and a

second region where the basis weight of the absorbent polymer is lower than a basis weight in the first region,

a curving unit is formed in at least the urination region for causing the absorber to bend convexly in the inner direction;

the second region is provided to the absorber in the urination region,

and

the first region is provided to a topsheet side of the absorber in the buttocks region.