Absorbent article

Patent metadata

Field	Value
Publication number	US-10888472-B2
Application number	US-201615761545-A
Country	US
Kind code	B2
Filing date	Aug 4, 2016
Priority date	Sep 30, 2015
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

An absorbent article includes an absorbent element obtained by wrapping an absorbent body in a wrapping sheet. The wrapping sheet includes an intermediate part located on one side of a front side and a back side of the absorbent body and both side parts folded back to the other side of the absorbent body from the intermediate part. The both side parts are overlapped with each other on the other side of the absorbent body. An overlapped part is bonded through a hot melt adhesive to form a connecting portion. A surface of the absorbent body on a side of the connecting portion is bonded to an internal surface of the wrapping sheet through hot melt adhesives, and the connecting portion of the wrapping sheet extends in a width direction to extend over both widthwise sides of a slit provided in the absorbent body.

First claim

The invention claimed is:

1. An absorbent article having a crotch portion, and a front side portion and a back side portion extending at a front side and a back side of the crotch portion, respectively, the absorbent article comprising:
an absorbent element having an absorbent body provided in a front-back direction range including the crotch portion and a wrapping sheet wrapping the absorbent body,
the wrapping sheet including an intermediate part located at a first side of a front face side and a back face side of the absorbent body and both side parts folded back to a second side of the front face side and the back face side of the absorbent body from the intermediate part, the both side parts of the wrapping sheet being overlapped at the second side, overlapping parts of the both side parts being bonded each other through a hot melt adhesive to form a connecting portion, and
at least a surface of the absorbent body on a connecting portion side being bonded to an internal surface of the wrapping sheet through a hot melt adhesive,
wherein a slit having a predetermined width extends in a front-back direction in the absorbent body in at least the crotch portion, and
the connecting portion of the wrapping sheet extends in a width direction to extend over both sides of the slit in the width direction in the absorbent body,
wherein in the intermediate part of the wrapping sheet, a part across the both sides of the slit in the width direction in the absorbent body is folded back an even number of times, opposing surfaces of a folded part are bonded through a hot melt adhesive, and the folded part is bonded to the absorbent body through a hot melt adhesive.

2. The absorbent article according to claim 1 , wherein the connecting portion of the wrapping sheet is located on the back face side of the absorbent body.

3. The absorbent article according to claim 2 , wherein a liquid impervious sheet made of a resin film is provided on a back face side of the absorbent element, and the connecting portion of the wrapping sheet is bonded to the liquid impervious sheet through a hot melt adhesive.

4. The absorbent article according to claim 1 , wherein
parts directly opposing each other by the slit in the wrapping sheet are bonded through a hot melt adhesive layer, and
a usage amount of a hot melt adhesive bonding the parts directly opposing each other by the slit in the wrapping sheet is larger than a usage amount of the hot melt adhesive bonding the wrapping sheet and the absorbent body together.

5. The absorbent article according to claim 1 , wherein at least one part of two parts forming the connecting portion in the both side parts of the wrapping sheet is folded back once or a plurality of times, and opposing surfaces of a folded part are bonded through a hot melt adhesive.

6. The absorbent article according to claim 1 , wherein a plurality of slits is provided in the absorbent body at an interval in the width direction, and the connecting portion of the wrapping sheet extends in the width direction from a first side of the slit in the width direction located closest to a first side in the width direction to a second side of the slit in the width direction located closest to the second side in the width direction.

7. The absorbent article according to claim 1 , wherein
the absorbent body is obtained by mixing and accumulating fibers and high absorbent polymer particles, and
a weight ratio of fibers:high absorbent polymer particles in the absorbent body corresponds to 50:50 to 20:80.

Assignees

• Daio Seishi Kk

Inventors

• Ito Shuichi
• Murai Kosuke
• Mori Yosuke

Classifications

• A61F2013/53908

  with adhesive · CPC title

• A61F2013/53765

  characterized by its geometry · CPC title

• A61F2013/530496

  being fixed to fibres · CPC title

• A61F13/539 Primary

  characterised by the connection of the absorbent layers with each other or with the outer layers · CPC title

• A61F13/5376

  characterised by the performance of the layer, e.g. acquisition rate, distribution time, transfer time · CPC title