Disposable wearing article with curving unit

Patent metadata

Field	Value
Publication number	US-9801764-B2
Application number	US-201214343373-A
Country	US
Kind code	B2
Filing date	Sep 5, 2012
Priority date	Sep 7, 2011
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

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.

First claim

The invention claimed is:

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
the absorber has a curving unit in at least the urination region to cause the absorber to curve convexly in the inner direction,
the absorbent sheet is disposed in the buttocks region, but not in the urination region,
the buttocks region includes at least one polymer containing region in which the absorbent polymer is disposed,
the curving unit is positioned forward of the at least one polymer containing region,
the curving unit is elongated in the longitudinal direction, and
the curving unit includes a curving unit stretchable member stretchable in the longitudinal direction.

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 first and second regions having an absorbent polymer, and wherein a basis weight of the absorbent polymer in the second region is lower than a basis weight of the absorbent polymer in the first region,
the absorber has a curving unit in at least the urination region to cause the absorber to bend convexly in the inner direction,
the second region is in the urination region,
the first region is on a top side of the absorber in the buttocks region,
the buttocks region includes at least one polymer containing region in which the absorbent polymer is disposed,
the curving unit is positioned forward of the at least one polymer containing region,
the curving unit is elongated in the longitudinal direction, and
the curving unit includes a curving unit stretchable member stretchable in the longitudinal direction.

3. The disposable wearing article according to claim 1 , wherein the curving unit further comprises at least one of:
a slit formed in the absorber;
a low basis weight region in the absorber, and having a lower basis weight than a further region of the absorber, the further region surrounding the low basis weight region; or
a compressed region of the absorber.

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

5. The disposable wearing article according to claim 4 , wherein the buttocks stretchable member includes a pair of leg-holes stretchable members adapted to be disposed around the legs of the wearer.

6. 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.

7. The disposable wearing article according to claim 1 , wherein
the buttocks region further includes a polymer non-containing region where the absorbent polymer is not disposed; and
the polymer non-containing region is provided between adjacent polymer containing regions among the plurality of polymer containing regions.

8. The disposable wearing article according to claim 1 , wherein the curving unit extends in the urination region and in the buttocks region.

9. The disposable wearing article according to claim 4 , wherein the buttocks stretchable member is further stretchable in the widthwise direction.

10. The disposable wearing article according to claim 8 , wherein the at least one polymer containing region defines a V-shape where an apex of the V-shape is directed rearwardly in the longitudinal direction.

11. The disposable wearing article according to claim 1 , wherein
the curving unit further includes a central aperture,
the central aperture is formed in a center of the absorber in the widthwise direction, and
the curving unit stretchable member overlaps the central aperture in the thickness direction of the disposable wearing article.

12. The disposable wearing article according to claim 1 , wherein the at least one polymer containing region includes a plurality of polymer containing regions.

13. The disposable wearing article according to claim 1 , wherein the curving unit stretchable member is a central elastic member on a center longitudinal line that bisects a width of the absorber in the widthwise direction.

Assignees

• Arayama Takaya
• Mukai Hirotomo
• Unicharm Corp

Inventors

• Arayama Takaya
• Mukai Hirotomo

Classifications

• A61F13/494

  characterised by edge leakage prevention means · CPC title

• A61F13/532 Primary

  inhomogeneous in the plane of the pad · CPC title

• A61F13/535

  inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ({A61F13/5323,} A61F13/537 take precedence) · CPC title

• A61F13/49001

  having preferential bending zones, e.g. fold lines or grooves · CPC title