Articles with dispersed conductive coatings

• US 20060257638A1
• Filed: 01/29/2004
• Published: 11/16/2006
• Est. Priority Date: 01/30/2003
• Status: Abandoned Application

• Current Assignee: Eikos, Inc.
• Original Assignee: Eikos, Inc.
• Inventors: Ito, Hidemi, Sakai, Masato, Glatkowski, Paul J., Piche, Joseph W.
• Application Number:
  US10/542,785
• Publication Number:
  US 20060257638A1
• Time in Patent Office: Days
• US Class Current: 428/292.100
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: Y10T 428/249924 Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity

Abstract

A conductive article includes a substrate made of a thermoplastic resin, and a transparent and conductive layer comprising carbon nanotubes and formed on at least one face of the substrate. The carbon nanotubes are electrical in contact with each other and dispersed so that each of the carbon nanotubes is separated form other carbon nanotubes, or that each of bundles of the carbon nanotubes is separated from other bundles.

Claims

1. A conductive article comprising:

a substrate; and

a transparent and conductive layer comprising fine conductive fibers and formed on at least one face of the substrate,

wherein the fibers are electrically in contact with each other and dispersed so as not to form agglomerates of said fibers.

2. The conductive article of claim 1,

wherein the fibers are electrically in contact with each other and dispersed so that each of the fibers is separated from other fibers, or that each of bundles of the fibers is separated from other bundles.

3. The conductive article of claim 1, wherein the fibers are carbon fibers.

4. The conductive article of claim 1, wherein carbon fibers are carbon nanotubes.

5. The conductive article of claim 1, wherein the fibers are multi-wall carbon nanotubes, and each of the carbon nanotubes is separated from other carbon nanotubes while maintaining electrical contact between the nanotubes.

6. The conductive article of claim 1, wherein the fibers are single-wall carbon nanotubes that form bundles of the carbon nanotubes, and each of the bundles is separated from other bundles while maintaining electrical contact between the bundles.

7. The conductive article of claim 1, wherein the fibers are double-wall or triple-wall carbon nanotubes that form bundles of the carbon nanotubes, and each of the bundles is separated from other bundles while maintaining electrical contact between the bundles.

8. The conductive article of claim 1, wherein the conductive article has a surface resistivity of from 10⁰ to 10¹¹ /□

.

9. The conductive article of claim 1, wherein the transparent and conductive layer has a surface resistivity of from 10⁰ to 10¹ /□

and a 550 nm light transmittance of at least 50%.

10. The conductive article of claim 1, wherein the transparent and conductive layer has a surface resistivity of from 10² to 10³ /□

and a 550 nm light transmittance of at least 75%.

11. The conductive article of claim 1, wherein the transparent and conductive layer has a surface resistivity of from 10⁴ to 10⁶ /□

and a 550 nm light transmittance of at least 90%.

12. The conductive article of claim 1, wherein the transparent and conductive layer has a surface resistivity of from 10⁷ to 10¹¹ /□

and a 550 nm light transmittance of at least 93%.

13. The conductive article of claim 1, wherein the substrate is formed of a transparent synthetic resin.

14. A conductive article comprising:

a substrate made of a thermoplastic resin; and

a transparent and conductive layer comprising carbon nanotubes and formed on at least one face of the substrate,

wherein the carbon nanotubes are electrically in contact with each other and dispersed so that each of the carbon nanotubes is separated form other carbon nanotubes, or that each of bundles of the carbon nanotubes is separated from other bundles.

15. A method for manufacture of a conductive article comprising:

applying a layer of fine conductive fibers to a surface of a substrate, wherein the fibers are electrically in contact with each other and dispersed so as not to form agglomerates of said fibers.

16. The method of claim 15, wherein the fine conductive fibers are carbon nanotubes.

17. The method of claim 15, wherein the conductive article has a surface resistivity of from 10⁰ to 10¹¹ /□

.

18. The method of claim 15, wherein the conductive article has a surface resistivity of from 10⁰ to 10¹ /□

and a 550 nm light transmittance of at least 50%.

19. The method of claim 15, wherein the conductive article has a surface resistivity of from 10² to 10³ /□

and a 550 nm light transmittance of at least 75%.

20. The method of claim 15, wherein the conductive article has a surface resistivity of from 10⁴ to 10⁶ /□

and a 550 nm light transmittance of at least 90%.

21. The method of claim 15, wherein the substrate is formed of a transparent synthetic resin.