Support film for a transparent conductive thin film

• US 6,495,253 B1
• Filed: 09/14/2000
• Issued: 12/17/2002
• Est. Priority Date: 09/17/1999
• Status: Expired due to Term

• Current Assignee: Kimoto Company Limited
• Original Assignee: Kimoto Company Limited
• Inventors: Kimura, Yoshihisa, Koyama, Masuo, Hirosawa, Atsunobu
• Primary Examiner(s): Zirker, Daniel
• Assistant Examiner(s): CHANG, VICTOR S
• Application Number:
  US09/662,344
• Time in Patent Office: 824 Days
• Field of Search: 428/343, 428/345, 428/355.R, 428/354, 428/352
• US Class Current: 428/343
• CPC Class Codes: B32B 17/10752 containing polycarbonate
• CPC Class Codes: B32B 2323/04 Polyethylene
• CPC Class Codes: B32B 2323/10 Polypropylene
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2809 including irradiated or wave energy treated component
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2852 Adhesive compositions

Abstract

An adhesive layer composed of at least an ionizing radiation curable resin binder, a thermoplastic resin binder and two or more matting agents having different average diameters is formed on a transparent polymer film to obtain a support film for a transparent conductive thin film. Alternatively, a transparent hard coat layer containing at least an ionizing radiation curable resin binder and,a matting agent having an average diameter of 1-15 μm, and an adhesive layer containing at least an ionizing radiation curable resin binder, a thermoplastic resin binder and a matting agent having an average diameter of 5-50 nm are formed on a transparent polymer film. The thus obtained support film is excellent in durability when the transparent conductive thin film is formed thereon and prevents occurrence of a Newton-ring, which is produced in a touch panel of the conventional liquid crystal display. The support film, when used in a touch panel of a color liquid crystal display, prevents glare of the color screen and is suitable for use in touch panels of both monochrome and color liquid crystal displays.

Claims

1. A support film providing good adhesiveness to a transparent conductive thin film comprising:

a transparent polymer film; and

an adhesive layer formed on the transparent polymer film, said adhesive layer comprising an ionizing radiation curable resin binder, a thermoplastic resin binder and at least two matting agents having first and second average diameters.

2. The support film providing good adhesiveness to a transparent conductive thin film of claim 1,

wherein the matting agents include a first matting agent having an average diameter of 1-15 μ m and a second matting agent having an average diameter of 5-50 nm.

5. A transparent conductive film sheet comprising a support film of claim 1 and a transparent conductive thin film formed on the support film.

6. A transparent conductive film sheet comprising a support film of claim 2 and a transparent conductive thin film formed on the support film.

3. A support film providing good adhesiveness to a transparent conductive thin film comprising:

a transparent polymer film;

a transparent hard coat layer formed on the transparent polymer film and comprising an ionizing radiation curable resin binder and a matting agent having an average diameter of 1-15 μ

m; and

an adhesive layer formed on said transparent hard coat layer and comprising an ionizing radiation curable resin binder, a thermoplastic resin binder and a matting agent having an average diameter of 5-50 nm.

4. The support film of claim 3,

wherein the thickness of the transparent hard coat layer is 2-15 μ m and the thickness of the adhesive layer is 0.2-1.5 μ

m.

7. A transparent conductive film sheet comprising a support film of claim 3 and a transparent conductive thin film formed on the support film.

8. A transparent conductive film sheet comprising a support film of claim 4 and a transparent conductive thin film formed on the support film.