# US 2018/0021472 A1 · Absorbent materials

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- Number: US 2018/0021472 A1
- Document ID: US20180021472A1
- Status: Published application
- Kind: A1
- Application number: 15/653,848
- Filed: 2017-07-19
- Published: 2018-01-25
- Earliest claimed: 2016-07-20
- Assignees: Advanced Medical Solutions Limited
- Applicants: Advanced Medical Solutions Limited
- Inventors: Colin Raymond BRADFORD; Brian John HAMERSLAGH
- Web page: https://patentgrep.com/patent/US20180021472A1

## CPC

- A61L 15/60: Liquid-swellable gel-forming materials, e.g. super-absorbents
- A61F 13/0253: {characterized by the adhesive material}
- A61L 15/32: Proteins, polypeptides; Degradation products or derivatives thereof, e.g. albumin, collagen, fibrin, gelatin {(A61L15/225 takes precedence)}
- A61L 15/46: Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
- A61L 26/0023: {Polysaccharides}
- A61L 26/0052: {Mixtures of macromolecular compounds}
- D04H 1/43825: {Composite fibres}
- A61F 2013/00421: {with double adhesive layer}
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- 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)
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)

## Abstract

The present invention provides dry-creped absorbent material comprised of gelling fibres intended for use particularly, but not necessarily exclusively, as wound dressings or as a component (absorbent substrate) of a wound dressing, as well as wound dressings comprising the absorbent material.

## Claims

### Claim 1

A dry-creped absorbent material comprised of gelling fibres.

### Claim 2 (depends on 1)

A material as claimed in claim 1 having a compaction ratio of 80 to 40%.

### Claim 3 (depends on 1)

A material as claimed in claim 1 having a stretch ratio of 30 to 100%.

### Claim 4 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres comprise alginate fibres.

### Claim 5 (depends on 4)

A material as claimed in claim 4 wherein the alginate fibres incorporate carboxymethyl cellulose.

### Claim 6 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres comprise carboxymethyl cellulose, carboxymethyl viscose or carboxymethyl chitosan.

### Claim 7 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres are sulphonated fibres.

### Claim 8 (depends on 7)

A material as claimed in claim 7 wherein the sulphonated fibres comprise sulphonated cellulose or sulphonated viscose.

### Claim 9 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres comprise super absorbent fibres.

### Claim 10 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres incorporate an antimicrobial agent.

### Claim 11 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres have a length of 25 to 100 mm.

### Claim 12 (depends on 1)

A material as claimed in claim 1 wherein the gelling fibres have a thickness of 1.5 to 5.0 dtex.

### Claim 13 (depends on 1)

A material as claimed in claim 1 further comprising up to 50% by weight of non-gelling fibres.

### Claim 14 (depends on 13)

A material as claimed in claim 13 wherein the non-gelling fibres have a length of 25 to 100 mm.

### Claim 15 (depends on 13)

A material as claimed in claim 13 wherein the non-gelling fibres have a thickness of 1.5 to 5.0 dtex.

### Claim 16 (depends on 1)

A material as claimed in claim 1 wherein the absorbent substrate is a non-woven material.

### Claim 17 (depends on 16)

A material as claimed in claim 16 wherein the non-woven material is a felt.

### Claim 18 (depends on 1)

A material as claimed in claim 1 wherein the material does not incorporate stitching.

### Claim 19 (depends on 1)

A wound dressing comprising an absorbent material as claimed in claim 1.