# US 2018/0020936 A1 · Stretchable electrode sheet and stretchable wiring sheet, and biological information measurement interface

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- Number: US 2018/0020936 A1
- Document ID: US20180020936A1
- Status: Published application
- Kind: A1
- Application number: 15/543,087
- Filed: 2016-01-13
- Published: 2018-01-25
- Earliest claimed: 2015-01-14
- Assignees: Toyobo Co., Ltd.
- Applicants: Toyobo Co., Ltd.
- Inventors: Euichul KWON; Sonoko ISHIMARU
- Web page: https://patentgrep.com/patent/US20180020936A1

## CPC

- A61B 5/256: Wearable electrodes, e.g. having straps or bands
- A61B 5/263: characterised by the electrode materials
- A61B 5/265: containing silver or silver chloride
- A61B 5/268: containing conductive polymers, e.g. PEDOT:PSS polymers
- A61B 5/27: Conductive fabrics or textiles
- A61B 5/6804: {Garments; Clothes}
- H01B 1/02: mainly consisting of metals or alloys
- H01B 1/22: the conductive material comprising metals or alloys
- H01B 5/14: comprising conductive layers or films on insulating-supports
- A61B 5/68: {Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient}
- A61B 5/6802: {Sensor mounted on worn items}
- A61B 2562/164: the sensor is mounted in or on a conformable substrate or carrier
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

A stretchable conductive sheet comprising a first insulating layer and a stretchable conductor layer provided on the first insulating layer, wherein the stretchable conductor layer has an electric resistance of 300 Ω/cm or less, and a load at stretching of a stretching rate of 10% of the conductive sheet is 100 N or less.

## Claims

### Claim 1

A stretchable conductive sheet comprising:
a first insulating layer and a stretchable conductor layer provided on the first insulating layer,
wherein the stretchable conductor layer has an electric resistance of 300 Ω/cm or less, and a load at stretching of a stretching rate of 10% of the conductive sheet is 100 N or less.

### Claim 2 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein the stretchable conductor layer has an initial sheet resistance of 1 Ω square or less.

### Claim 3 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein the stretchable conductive sheet has a change in electric resistance at 20% stretching of less than 5-fold.

### Claim 4 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein the stretchable conductor layer comprises a conductive filler and a resin.

### Claim 5 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein the stretchable conductive sheet has a thickness of 200 μm or less.

### Claim 6 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein a stretchable conductor composition used in the stretchable conductive sheet contains at least conductive particles (a) and a flexible resin (c) having a tensile elastic modulus of 1 MPa or more and 1000 MPa or less, and
wherein the flexible resin (c) is contained in an amount of 7 to 35% by mass relative to the total amount of the conductive particles (a) and the flexible resin (c).

### Claim 7 (depends on 1)

The stretchable conductive sheet according to claim 1,
wherein a stretchable conductor composition used in the stretchable conductive sheet contains at least conductive particles (a), barium sulfate particles (b) and a flexible resin (c) having a tensile elastic modulus of 1 MPa or more and 1000 MPa or less, and
wherein the barium sulfate particles (b) are contained in an amount of 2 to 30% by mass relative to the total amount of the conductive particles (a) and barium sulfate particles (b), and the flexible resin (c) is contained in an amount of 7 to 35% by mass relative to the total amount of the conductive particles (a), barium sulfate particles (b) and the flexible resin (c).

### Claim 8 (depends on 6)

The stretchable conductive sheet according to claim 6,
wherein the average particle diameter of the conductive particles as measured by a dynamic light scattering method is larger than the average particle diameter of the barium sulfate particles as measured by a dynamic light scattering method.

### Claim 9 (depends on 7)

The stretchable conductive sheet according to claim 7,
wherein the barium sulfate particles are subjected to a surface treatment with a hydroxide and/or oxide of one or both of Al and Si.

### Claim 10 (depends on 6)

The stretchable conductive sheet according to claim 6,
wherein the conductive particles comprise silver particles having an average particle diameter, as measured by a dynamic light scattering method, of 0.5 to 20 μm.

### Claim 11 (depends on 1)

A biological information measurement interface comprising a substrate on which the stretchable conductive sheet according to claim 1 is laminated,
wherein the substrate is a strip-shaped material to be attached at least in a circumferential direction of a trunk of a human body, and/or a garment having a woven or knitted fabric or a non-woven fabric.

### Claim 12 (depends on 1)

The stretchable conductive sheet according to claim 1, further comprising a second insulating layer provided on the stretchable conductor layer.

### Claim 13 (depends on 11)

The biological information measurement interface according to claim 11, wherein the strip-shaped material is a belt or a brassiere.