# US 2018/0353353 A1 · Absorbent article

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- Number: US 2018/0353353 A1
- Document ID: US20180353353A1
- Status: Published application
- Kind: A1
- Application number: 15/781,279
- Filed: 2016-12-08
- Published: 2018-12-13
- Earliest claimed: 2015-12-09
- Assignees: Daio Paper Corporation
- Applicants: Daio Paper Corporation
- Inventors: Satoko KONAWA
- Web page: https://patentgrep.com/patent/US20180353353A1

## CPC

- A61F 13/53756: {the layer facing the back-sheet}
- A61F 13/532: inhomogeneous in the plane of the pad
- A61F 13/533: having discontinuous areas of compression
- A61F 13/537: characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer {(A61F13/538 takes precedence)}
- A61F 13/5323: {having absorbent material located in discrete regions, e.g. pockets}
- A61F 13/53436: {having an undulated or corrugated cross-section}
- A61F 2013/4708: {Panty-liner}
- A61F 2013/530306: {coated with superabsorbent polymer}
- A61F 2013/530562: {being arranged in discontinuous pattern}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A polymer provided region (13) at which a superabsorbent polymer (12) is provided, and a polymer non-provided region (14) at which the superabsorbent polymer (12) is not provided are formed, a liquid diffusion sheet (15), that promotes diffusion of body fluid in a plane direction, is staked to be adjacent to a skin side surface of a lower layer sheet (11), and an upper layer sheet (10) is bonded with the liquid diffusion sheet (15) under a state that the upper layer sheet (10) contacts the liquid diffusion sheet (15), at the polymer non-provided region (14) to form a polymer sheet (4).

## Claims

### Claim 1

An absorbent article, comprising:
a polymer sheet in which a superabsorbent polymer is provided between an upper layer sheet provided at a skin side, and a lower layer sheet provided at a non-skin side,
wherein a polymer provided region at which the superabsorbent polymer is provided, and a polymer non-provided region at which the superabsorbent polymer is not provided are formed in the polymer sheet,
wherein a liquid diffusion sheet, that promotes diffusion of body fluid in a plane direction, is staked to be adjacent to a skin side surface of the lower layer sheet, and
wherein the upper layer sheet is bonded with the liquid diffusion sheet under a state that the upper layer sheet contacts the liquid diffusion sheet, at the polymer non-provided region.

### Claim 2 (depends on 1)

The absorbent article according to claim 1, wherein Klemm water absorbency defined by JIS P8141 of the liquid diffusion sheet, by 10 minutes, is greater than or equal to 25 mm, and liquid permeability in a thickness direction of the liquid diffusion sheet is lower than that of each of the upper layer sheet and the lower layer sheet.

### Claim 3 (depends on 1)

The absorbent article according to claim 1,
wherein the polymer sheet is sectioned into a plurality of first defined regions each of whose inside is the polymer provided region, and second defined regions each of which is positioned at a center of the four adjacent first defined regions and each of whose inside is the polymer non-provided region,
wherein each of the first defined regions is surrounded by bonded portions at least at upper, lower, left and right positions, respectively, each of the bonded portions bonding the upper layer sheet with the liquid diffusion sheet, and
wherein the plurality of first defined regions are aligned in a square lattice form along a longitudinal direction and also a width direction of the absorbent article.

### Claim 4 (depends on 1)

The absorbent article according to claim 1,
wherein the liquid diffusion sheet has a multi-layered structure in which a first sheet that promotes diffusion of the body fluid in the plane direction, and a second sheet whose liquid permeability in the thickness direction is lower than that of each of the upper layer sheet and the lower layer sheet are stacked, and
wherein the first sheet and the second sheet are provided in this order from the skin side.

### Claim 5 (depends on 4)

The absorbent article according to claim 4, wherein Klemm water absorbency defined by JIS P8141 of the first sheet of the liquid diffusion sheet, by 10 minutes, is greater than or equal to 25 mm.