ABSORBENT ARTICLE

• US 20190328586A1
• Filed: 06/05/2017
• Published: 10/31/2019
• Est. Priority Date: 06/06/2016
• Status: Active Grant

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: MUKAI, Hirotomo, NAGAI, Takahito
• Granted Patent: US 11,318,053 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• CPC Class Codes: A61F 13/49 Absorbent articles specially adapted to be worn around the waist, e.g. diapers
• CPC Class Codes: A61F 13/49011 the elastic means is located at the waist region
• CPC Class Codes: A61F 13/49017 the elastic means being located at the crotch region
• CPC Class Codes: A61F 13/494 characterised by edge leakage prevention means
• CPC Class Codes: A61F 13/49413 the edge leakage prevention means being an upstanding barrier
• CPC Class Codes: A61F 13/4942 the barrier not being integral with the top- or back-sheet
• CPC Class Codes: A61F 13/496 in the form of pants or briefs
• CPC Class Codes: A61F 13/532 inhomogeneous in the plane of the pad
• CPC Class Codes: A61F 2013/49074 hourglass; dog bone-shaped
• CPC Class Codes: A61F 2013/49084 conformable

Abstract

An absorbent article includes: an absorbent main body including an absorbent core; and leak-proof walls on respective widthwise side portions of the absorbent main body. Each leak-proof wall is capable of standing on a skin side in the thickness direction, and includes a skin-side portion and a non-skin-side portion. A joined part is formed by joining at least partially facing surfaces of the skin-side and non-skin-side portions. The absorbent main body includes a crotch stretchable portion in a central portion in the width direction and the longitudinal direction, and the crotch stretchable portion stretches/contracts in at least one of the longitudinal direction and the width direction. The joined part is provided inside a distal end of the leak-proof wall and outside the crotch stretchable portion in the width direction. A part of the joined part and a part of the crotch stretchable portion at least overlap in the longitudinal direction.

Claims

1. An absorbent article comprising:

an absorbent main body including an absorbent core and having a longitudinal direction, a width direction, and a thickness direction that intersect one another,

the absorbent main body including a crotch stretchable portion in a central portion in the width direction and the longitudinal direction,

the crotch stretchable portion being capable of stretching and contracting in at least one direction of the longitudinal direction and the width direction;

a pair of leak-proof walls provided on respective widthwise side portions of the absorbent main body,

each of the leak-proof walls including an elastic member that stretches and contracts in the longitudinal direction,

each of the leak-proof walls being capable of standing on a skin side in the thickness direction,

each of the leak-proof walls including a skin-side portion and a non-skin-side portion,

the non-skin-side portion disposed on a non-skin side in the thickness direction with respect to the skin-side portion; and

a joined part provided inside a distal end of the leak-proof wall and outside the crotch stretchable portion in the width direction,

the joined part formed by joining at least partially a surface of the skin-side portion and a surface of the non-skin-side portion, the surfaces facing to each other,

a part of the joined part and a part of the crotch stretchable portion at least overlapping in the longitudinal direction.

2. The absorbent article according to claim 1, wherein

a longitudinal center of the crotch stretchable portion and a longitudinal center of the joined part are located on a front side with respect to a longitudinal center of the absorbent article.

3. The absorbent article according to claim 1, wherein

a longitudinal length of the joined part is larger than a longitudinal length of the crotch stretchable portion, and

a longitudinal back end portion of the joined part is located on a back side in the longitudinal direction with respect to the crotch stretchable portion.

4. The absorbent article according to claim 1, wherein

the absorbent article further comprises:

a front waist portion located on one end side of the absorbent main body; and

a back waist portion located on another end side of the absorbent main body, and

at least one end portion of the joined part overlaps in the longitudinal direction an elastic member of the front waist portion or the back waist portion,

the elastic member disposed surrounding a leg of a wearer.

5. The absorbent article according to claim 1, wherein

the absorbent article further comprises an exterior body including

a front waist portion located on one end side of the absorbent main body and

a back waist portion located on another end side of the absorbent main body, and

at least one end portion of the joined part overlaps in the longitudinal direction a bonding region where the exterior body and the absorbent main body are bonded.

6. The absorbent article according to claim 1, wherein

the absorbent core includes a low-basis-weight portion in a widthwise central portion,

the low-basis-weight portion is a portion in which a basis weight of the absorbent core is smaller than the basis weight in a surrounding of the portion, and

the low-basis-weight portion, the joined part, and the crotch stretchable portion at least partially overlap in the longitudinal direction.

7. The absorbent article according to claim 1, wherein

the absorbent core includes a pair of second low-basis-weight portions on respective widthwise side portions,

each of the pair of second low-basis-weight portions is a portion in which a basis weight of the absorbent core is smaller than the basis weight in a surrounding of the portion,

the joined part is disposed outside in the width direction with respect to the second low-basis-weight portion, and

the second low-basis-weight portion, the joined part, and the crotch stretchable portion at least partially overlap in the longitudinal direction.

8. The absorbent article according to claim 1, wherein

the absorbent article further comprises an exterior body including

a front waist portion located on one end side of the absorbent main body,

a back waist portion located on another end side of the absorbent main body, and

a crotch portion located between the front waist portion and the back waist portion,

a longitudinal central portion of the exterior body is narrowed inward in the width direction, and

the absorbent main body includes a part having a larger width than a width of the exterior body, in a region in which the absorbent main body overlaps the joined part in the longitudinal direction.

9. The absorbent article according to claim 1, wherein

the absorbent article further comprises an exterior body including

a front waist portion located on one end side of the absorbent main body,

a back waist portion located on another end side of the absorbent main body, and

a crotch portion located between the front waist portion and the back waist portion, and

a bonding region in which the exterior body and the absorbent main body are bonded includes a part having a smaller width than widths of longitudinal end portions of the bonding region, in a region in which the bonding region overlaps the joined part in the longitudinal direction.