# US 10,952,911 B2 · Incontinence absorbent article with cotton fiber front-surface sheet

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- Number: US 10,952,911 B2
- Document ID: US10952911B2
- Status: Granted
- Kind: B2
- Application number: 15/778,484
- Filed: 2016-11-30
- Published: 2018-12-06
- Granted: 2021-03-23
- Earliest claimed: 2015-11-30
- Assignees: Daio Paper Corporation
- Applicants: Daio Paper Corporation
- Inventors: Ryoko Kurihara; Mariko Nagashima
- Web page: https://patentgrep.com/patent/US10952911B2

## CPC

- A61F 13/51113: {comprising an additive, e.g. lotion or odour control (A61F13/51108 takes precedence)}
- A61F 13/51121: {characterised by the material}
- A61F 13/47: Sanitary towels, incontinence pads or napkins (A61F13/49 takes precedence)
- A61F 13/511: Topsheet, i.e. the permeable cover or layer facing the skin
- A61F 13/51104: {the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections}
- A61F 13/512: characterised by its apertures, e.g. perforations
- A61F 2013/5104: {with pulp and polymeric fibres}
- A61F 2013/530007: {being made from pulp}
- 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

To provide an absorbent article that uses a cotton fiber in a front-surface sheet, prevents rebounding, improves an absorption speed, and reduces a diffusion range of urine in the front-surface sheet. An incontinence pad 1 having a medium or larger volume that absorbs 20 cc or a larger volume of urine is provided. A front-surface sheet 3 is a spunlace nonwoven fabric made of 100% cotton fiber by weight, is coated with a water repellent agent and has many front-face/back-face penetrating openings 10 in a region containing a part corresponding to an excreting hole. The absorber is made of a pulp fiber that does not contain synthetic fiber and a superabsorbent polymer, a basis weight of the pulp fiber being 75 to 300 g/m2, a basis weight of the superabsorbent polymer being 85 to 185 g/m2, and a ratio of the pulp fiber and the superabsorbent polymer being pulp fiber:superabsorbent polymer=70 to 30% by weight:30 to 70% by weight.

## Claims

### Claim 1

An incontinence absorbent article having an absorber interposed between a front-surface sheet and a back-surface sheet characterized in that:
the incontinence absorbent article is an incontinence pad having a medium or larger volume that absorbs 20 cc or a larger volume of urine;
the front-surface sheet is a spunlace nonwoven fabric made of 100% by weight of cotton fiber, is coated with a water repellent agent and has many front-face/back-face penetrating openings in a region containing a part corresponding to an excreting hole;
the front-surface sheet has a structure in which many vertical streaks that extend along the longitudinal direction of the incontinence absorbent article and are formed with gaps in the width direction and many lateral streaks that extend along the width direction of the incontinence absorbent article and connect between adjacent vertical streaks that are formed with a gap in the longitudinal direction are formed by the cotton fiber; the openings are formed in a part surrounded by the vertical streaks and lateral streaks; a width W1 of each of the vertical streaks is set at 0.5 to 2.5 mm, a width W2 of each of the lateral streaks is set at 0.2 to 1.6 mm, and a ratio of the width W1 to W2 (W1/W2) is set at 1.2 to 2.0;
the openings are formed in a vertically long shape that is long in the longitudinal direction of the incontinence absorbent article and each of the openings has a dimension in which a length L1 in the longitudinal direction of the incontinence absorbent article is set at 1.0 to 4.0 mm, a length L2 in the width direction of the absorbent article is set at 0.5 to 1.5 mm, and a ratio of L1 to L2 (L1/L2) is set at 1.2 to 5.0; an area of each of the openings is set at 0.9 to 3.0 mm2, and an aperture ratio is set at 15 to 45%; and
the absorber is made of a pulp fiber that does not contain synthetic fiber and a superabsorbent polymer, a basis weight of the pulp fiber being 75 to 300 g/m2, a basis weight of the superabsorbent polymer being 85 to 185 g/m2, and a ratio of the pulp fiber and the superabsorbent polymer being pulp fiber:superabsorbent polymer=70 to 30% by weight:30 to 70% by weight.

### Claim 2 (depends on 1)

The absorbent article according to claim 1, wherein the front-surface sheet is made of non-degreased cotton fiber.

### Claim 3 (depends on 1)

The absorbent article according to claim 1, wherein glyceryl stearate is used as the water repellent agent, a coating amount of the water repellent agent being 0.05 to 0.30 parts by weight relative to 100 parts by weight of pulp fiber.

### Claim 4 (depends on 2)

The absorbent article according to claim 2, wherein glyceryl stearate is used as the water repellent agent, a coating amount of the water repellent agent being 0.05 to 0.30 parts by weight relative to 100 parts by weight of pulp fiber.