Electrode sheet and process for producing electrode sheet

• US 8,739,397 B2
• Filed: 09/25/2008
• Issued: 06/03/2014
• Est. Priority Date: 09/25/2007
• Status: Expired due to Fees

• Current Assignee: Asakura Senpu Co., Ltd., Nihon Kohden Corporation
• Original Assignee: Asakura Senpu Co., Ltd., Nihon Kohden Corporation
• Inventors: Nagata, Shinya, Iwasaki, Nobumichi
• Primary Examiner(s): Cohen, Lee S
• Assistant Examiner(s): Cardinal, Erin M
• Application Number:
  US12/679,747
• Publication Number:
  US 20100198038A1
• Time in Patent Office: 2,077 Days
• Field of Search: 600/388, 600/389, 600/395, 600/509, 298/25, 295/921, 298/29, 442/117
• US Class Current: 29/829
• CPC Class Codes: A61B 2562/125 characterised by the manufacture of electrodes
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/6804 Garments; Clothes
• CPC Class Codes: A61B 5/6833 Adhesive patches
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base
• CPC Class Codes: Y10T 442/2418 Coating or impregnation increases electrical conductivity or anti-static quality

Abstract

A material 2 is used as the fabric of a shirt, and formed by knitting a blended yarn of polyester and urethane. The material 2 is flattened by a calendering process. A conductive ink is printed on an insulating layer serving as an underlayer to form wiring layers L1 to L10. The conductive ink contains carbon nanotubes. Consequently, wiring layers that ensure a sufficient conductivity can be obtained.

Claims

1. A process for making an electrode sheet, comprising the steps of:

providing a material, the material being formed by knitting or weaving;

flattening at least one surface of the material that was formed by knitting or weaving;

printing a conductive ink containing carbon nanotubes on the one flattened surface of the material to form a wiring layer; and

forming, on the electrode sheet, an electrode electrically connected to the wiring layer, the wiring layer extending from the electrode to an edge of the electrode sheet.

2. The process of making an electrode sheet according to claim 1,

wherein the conductive ink contains a binder containing an acrylic resin, a dispersant containing an acrylic acid polymer, and carbon nanotubes.

3. The process of making an electrode sheet according to claim 1,

wherein the material is produced by knitting or weaving, and is selected from group consisting of:

a blended yarn of polyester fibers and urethane fibers, a yarn of nylon fibers, and a yarn of urethane fibers.

4. The process of making an electrode sheet according to claim 1,

wherein the material is flattened by a calendering process.

5. The process for an electrode sheet according to claim 1,

wherein after the material is flattened,

a non-conductive ink is printed on the one flattened surface of the material to form a lower insulating layer, and

the wiring layer is formed on the lower insulating layer.

6. The process of making an electrode sheet according to claim 1,

wherein after the wiring layer is formed,

an insulating ink is printed on the wiring layer to form an upper insulating layer.

7. The process of making an electrode sheet according to claim 1,

wherein an adhesive conductive paste is applied on the wiring layer to form the electrode.

8. The process of making an electrode sheet according to claim 1,

wherein the electrode is an electrode that measures an electrocardiographic waveform of a wearer of the electrode sheet.

9. The process of making an electrode sheet according to claim 1,

wherein the wiring layer and a wire on a film substrate connected to a connector are secured by a hot-melt adhesive.