# US 4,948,651 A · Burn sheet

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- Number: US 4,948,651 A
- Document ID: US4948651A
- Status: Granted
- Kind: A
- Application number: 07/372,870
- Filed: 1989-06-27
- Granted: 1990-08-14
- Earliest claimed: 1989-06-27
- Assignees: DeRoyal Industries, Inc.
- Inventors: Autry O. V. DeBusk; Charles A. Lee
- Web page: https://patentgrep.com/patent/US4948651A

## CPC

- A61F 13/01017: {synthetic, e.g. polymer based}
- A61B 46/40: {Drape material, e.g. laminates; Manufacture thereof}
- A61F 13/01008: {characterised by the material}
- A61F 13/5116: {being formed of multiple layers (A61F13/5123 takes precedence)}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/36: comprising polyesters
- A61F 2013/00157: {for burns or skin transplants (A61F2013/00187 takes precedence; not adhering to the wound A61F2013/00217)}
- A61F 2013/00217: {not adhering to the wound}
- A61F 2013/00519: {for treating burn}
- A61F 2013/00604: {Multilayer}
- A61F 2013/15073: {as drapes}
- A61F 2013/51126: {being nets}
- A61F 2013/51147: {being polymeric films}
- A61F 2013/51409: {being a film}
- A61F 2013/530007: {being made from pulp}
- B32B 2262/0276: Polyester fibres
- B32B 2307/726: Permeability to liquids, absorption
- B32B 2367/00: Polyesters, e.g. PET, i.e. polyethylene terephthalate
- B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter
- Y10T 428/24091: with additional layer[s]
- Y10T 428/24099: On each side of strands or strand-portions
- Y10T 442/186: Comprising a composite fiber
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A burn sheet comprising a plurality of layers laminated one to another and including a liquid-permeable top layer, a liquid-absorbent layer and a strength-imparting scrim layer. The scrim layer comprises an open pattern of crossing multifilamentary yarns bonded on one another at their crossings. The scrim is flattened prior to its incorporation into the burn sheet laminate so that cut ends of the scrim yarn monofilaments yield to the touch and the sheet is rendered conformable, and telegraphing of the scrim to the surface of the sheet is minimized. The sheet is suitable for use as a transfer sheet as well as for a burn sheet.

## Claims

### Claim 1

A burn sheet characterized in that said sheet comprises a plurality of layers including a layer of liquid-absorbent material and a strength-imparting layer comprising a scrim formed of a plurality of multifilamentary yarns, said scrim having a tensile strength of at least about 45 pli and an elongation in either its length or width dimension of not greater than about 30% thereby permitting said burn sheet to be grasped at the side edges thereof and serve as a transfer sheet for a patient disposed theron.

### Claim 2 (depends on 1)

The burn sheet of claim 1 and further characterized in that each of said multifilamentary yarns comprises a plurality of monofilaments.

### Claim 3 (depends on 2)

The burn sheet of claim 2 and further characterized in that said monofilaments of said yarn are bonded one to another.

### Claim 4 (depends on 2)

The burn sheet of claim 2 and further characterized in that said monofilaments of said yarn are bonded one to another by means of a heat-rebondable adhesive.

### Claim 5 (depends on 1)

The burn sheet of claim 1 and further characterized in that said scrim is of an open pattern and includes between 2 and 12 yarns per inch in the machine direction and between about 2 and about 12 yarns per inch in the cross direction.

### Claim 6 (depends on 5)

The burn sheet of claim 5 and further characterized in that said scrim includes 4 yarns per inch in the machine direction and 3 yarns per inch in the cross direction.

### Claim 7 (depends on 1)

The burn sheet of claim 1 and further characterized in that the yarns of said scrim are flattened to respective flat widths that are slightly less than about twice their respective diameters when in an unflattened condition.

### Claim 8 (depends on 1)

The burn sheet of claim 1 and further characterized in that said flattened scrim has a thickness of between about 0.005" and about 0.015" inch.

### Claim 9 (depends on 1)

The burn sheet of claim 1 and further characterized in that said scrim is formed of polyester.

### Claim 10 (depends on 1)

The burn sheet of claim 1 wherein each of said yarns of said scrim has a denier of at least about 1000 denier.

### Claim 11 (depends on 10)

The burn sheet of claim 10 wherein each of said yarns comprises at least about 192 individual filaments.