Stretchable electrode sheet and stretchable wiring sheet, and biological information measurement interface
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.
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 contains a resin having an elastic modulus of 30 MPa to 1000 MPa, and has an electric resistance of 300 Ω/cm or less, and
wherein a load, when the stretchable conductive sheet is stretched at a stretching rate of 10% of the stretchable conductive sheet, is 100 N or less.
2. The stretchable conductive sheet according to claim 1 ,
wherein the stretchable conductor layer has an initial sheet resistance of 1Ω square or less.
3. The stretchable conductive sheet according to claim 1 ,
wherein, when the stretchable conductive sheet is stretched at a stretching rate of 20% of stretchable conductive sheet, the stretchable conductive sheet has a change in electric resistance of less than 5-fold.
4. The stretchable conductive sheet according to claim 1 ,
wherein the stretchable conductor layer further comprises a conductive filler.
5. The stretchable conductive sheet according to claim 1 ,
wherein the stretchable conductive sheet has a thickness of 200 μm or less.
6. The stretchable conductive sheet according to claim 1 ,
wherein the stretchable conductor layer further comprises conductive particles, and
wherein the resin is contained in an amount of 7 to 35% by mass relative to a total amount of the conductive particles and the resin.
7. 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.
8. The stretchable conductive sheet according to claim 1 ,
wherein the stretchable conductor layer further comprises conductive particles and barium sulfate particles, and
wherein the barium sulfate particles are contained in an amount of 2 to 30% by mass relative to a total amount of the conductive particles and barium sulfate particles, and the resin is contained in an amount of 7 to 35% by mass relative to the total amount of the conductive particles, barium sulfate particles and the resin.
9. The stretchable conductive sheet according to claim 8 ,
wherein an average particle diameter of the conductive particles as measured by a dynamic light scattering method is larger than an average particle diameter of the barium sulfate particles as measured by a dynamic light scattering method.
10. The stretchable conductive sheet according to claim 8 ,
wherein the barium sulfate particles are surface treated barium sulfate particles obtained by subjecting the barium sulfate particles to a surface treatment with a hydroxide and/or oxide of one or both of Al and Si.
11. 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 configured 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.
12. The biological information measurement interface according to claim 11 , wherein the strip-shaped material is a belt or a brassiere.
13. The stretchable conductive sheet according to claim 1 , further comprising a second insulating layer provided on the stretchable conductor layer.