POLARIZING PLATE PROTECTIVE FILM, POLARIZING PLATE AND RESISTIVE TOUCH PANEL

• US 20100321779A1
• Filed: 12/27/2007
• Published: 12/23/2010
• Est. Priority Date: 12/27/2006
• Status: Abandoned Application

• Current Assignee: Gunze Limited
• Original Assignee: Gunze Limited
• Inventors: Ishii, Yoshinori, Hane, Tomoko
• Application Number:
  US12/521,365
• Publication Number:
  US 20100321779A1
• Time in Patent Office: Days
• US Class Current: 359/491
• CPC Class Codes: C08J 2365/00 Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain C08J2307/00 - C08J2357/00, C08J2361/00 take precedence; Derivatives of such polymers
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/065 Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/3025 Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state G02B5/3008, G02B5/3016 take precedence
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

The present invention provides a polarizing plate protective film obtained by forming a silane coupling agent layer on one side of a cyclic olefin-based resin film; a polarizing plate wherein the protective film is laminated on one side or both sides of a polarizer through the isocyanate-based silane coupling agent layer; and a resistive touch panel using the polarizing plate.

Claims

1. A polarizing plate protective film obtained by forming a silane coupling agent layer on one side of a cyclic olefin-based resin film.

2. The polarizing plate protective film according to claim 1, wherein the silane coupling agent is an isocyanate-based silane coupling agent.

3. The polarizing plate protective film according to claim 1, wherein the cyclic olefin-based resin film is a retardation film to which the phase difference is imparted through stretching.

4. A polarizing plate comprising the protective film according to claim 1 and a polarizer, wherein the protective film is laminated on one side or both sides of a polarizer through the isocyanate-based silane coupling agent layer.

5. The polarizing plate according to claim 4, wherein the polarizer is a polarizing film obtained by adsorbing iodine or a dichromatic dye into a film comprising a polyvinyl alcohol-based polymer.

6. The polarizing plate according to claim 4, wherein the protective film is bonded to the polarizer using an aqueous adhesive comprising an aqueous polyvinyl alcohol solution.

7. A resistive touch panel using the polarizing plate according to claim 4.