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Articles with dispersed conductive coatings

a technology of conductive coating and dispersed conductive material, which is applied in the field of articles, can solve the problems of deterioration of the transparency of the anti-electrostatic layer, carbon fibers not well dispersed, and carbon fibers, so as to reduce the amount of ultra fine conductive fibers, improve the transparency, and good conductivity

Inactive Publication Date: 2006-11-16
EIKOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] Another embodiment of the invention is directed to methods for forming articles with the conductive layers that demonstrate a good conductivity, the thickness of which is reduced to improve the transparency, which may be by reducing the amount of the ultra fine conductive fiber.
[0010] Another embodiment of the invention is directed to method for forming articles with the transparent conductive layer that can be produced with low production costs.

Problems solved by technology

Therefore, the carbon fibers are not well dispersed.
However, the transparency of the anti-electrostatic layer is deteriorated when the amount of the carbon fiber is increased.
Thus, it is difficult to acquire the practical anti-electrostatic transparent resin plate that has both good transparency and electromagnetic shield property.
Therefore, it has a poor productivity and the high production cost.

Method used

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  • Articles with dispersed conductive coatings
  • Articles with dispersed conductive coatings
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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0059] The multi-layered carbon nanotube (product of Tsinghua-Nafine Nano-Powder Commercialization Engineering Center, with the average outer diameter of 10 nm) and tertiary amine modified alkyl co-polymer as the disperser are added to and equally dispersed in ethanol solvent. This coating solution is prepared such that it has 0.007 weight % of the multi-layered carbon nanotube and the 0.155 weight % of the disperser.

[0060] This coating solution is applied to the surface of a polycarbonate plate, which is a product of Takiron Co. Ltd., with the thickness of 3 mm, the light transmission of 90.2%, and the haze of 0.40%. The transparent conductive polycarbonate resin plate with the conductive layer of the thickness of 29 nm and the estimated content of the multi-layered carbon nanotube of 2.5 mg / m2 is obtained after the solution is dried. The surface resistivity and the light transmission of the conductive layer of the resin plate are measured by the same way as that of the example 1....

example 3

[0061] 1.7 weight % of the powdered vinylchloride resin as the binder is solved into cyclohexanon solvent. The single-layered carbon nanotube (product of Carbon Nano Technology, with the diameter of 0.7-2 nm) and alkylammonate solution of acid polymer, as a disperser are added to and equally dispersed in the solution. This coating solution has 0.3 weight % of single-layered carbon nanotube and 0.18 weight % of disperser. This coating solution is applied to and dried on the surface of acryl film with the thickness of 100 μm, acquiring the conductive laminate film. The transparent conductive vinylchloride resin plate is obtained by pressing the laminate film described above to the vinylchloride resin plate with the thickness of 3 mm in the temperature of 160° C. with the pressure of 30 Kg / cm2.

[0062] The conductive layer of this resin plate is observed by a transmission electron microscopy (a product of Nihon Denshi Kogyo Corp., JEM-2010), measuring the area ratio of the single-layere...

example 4

[0064] The coating solution is prepared by the following procedure. Single-layered Carbon nanotube (synthesized by referring to Chemical Physics Letters, 323 (2000) P 580-585, with the diameter of 1.3-1.8 nm) and the co-polymer between poly oxy-ethylene and poly oxy-propylene as the disperser are added to and dispersed in the mixture of isopropylene alcohol and water (with the compound ratio of 3:1) as a solvent. This coating solution is prepared such that it has 0.003 weight % of single-layered carbon nanotube and 0.05 weight % of disperser. This coating solution is applied to the surface of a polyethyleneterephtalate film with the thickness of 100 μm (with the light transmission of 94.5%, and the haze of 1.5%). After drying the solution, the film is coated with the urethane acrylate solution diluted to 1-600th with methyl isobutyl ketone, and then dried. The transparent conductive polyethyleneterephtalate film is obtained.

[0065] The conductive layer of the film is observed by a s...

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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.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to an articles that have a conductive layer and optionally a light transmittance, and to methods for producing such articles. [0003] 2. Description of the Background [0004] An anti-electrostatic resin plate that is able to release static electricity and avoid dust adherence has been used for a clean room partition such as windows used in the clean room. One such example is described in Japanese Laid Open Patent Publication 2001-62952. The resin material of this invention includes tangled fibers that would extend at the time of article formation to provide a good conductivity. A substrate film, where ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide) is placed on the surface, has been known as a transparent conductive film with a surface resistivity of 100 to 105Ω / □(Japanese Laid Open Paten Publication 2003-151358). [0005] In the conventional anti-electrostatic transparent resin plate (Japanese...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H1/00
CPCH01B1/24C09D5/24Y10T428/249924
Inventor GLATKOWSKI, PAUL J.PICHE, JOSEPH W.SAKAI, MASATOITO, HIDEMI
Owner EIKOS
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