Polarizing plate with pressure-sensitive adhesive layer

Patent metadata

Field	Value
Publication number	US-10139671-B2
Application number	US-201615341101-A
Country	US
Kind code	B2
Filing date	Nov 2, 2016
Priority date	Nov 4, 2015
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

There is provided a polarizing plate which is imparted durability. A polarizing plats with a pressure-sensitive adhesive, layer according to an embodiment of the present invention includes: a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer; and a pressure-sensitive adhesive layer formed on at least one surface of the polarizing plate, wherein in the surface of the polarizing plate where the pressure-sensitive adhesive layer is formed, a non-contact portion that is out of contact with the pressure-sensitive adhesive layer is formed in an end portion of the polarizing plate.

First claim

The invention claimed is:

1. A polarizing plate with a pressure-sensitive adhesive layer, comprising:
a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer; and
a pressure-sensitive adhesive layer formed on at least one surface of the polarizing plate,
wherein in the surface of the polarizing plate where the pressure-sensitive adhesive layer is formed, a non-contact portion that is out of contact with the pressure-sensitive adhesive layer is formed in an end portion of the polarizing plate.

2. The polarizing plate with a pressure-sensitive adhesive layer according to claim 1 , wherein the non-contact portion is formed at a position distant from an end side of the polarizing plate by 10 μm or more inward in a plane direction.

3. The polarizing plate with a pressure-sensitive adhesive layer according to claim 1 , wherein the non-contact portion is formed in an end portion in an absorption axis direction of the polarizer.

4. The polarizing plate with a pressure-sensitive adhesive layer according to claim 1 , wherein the polarizing plate has formed therein a through-hole and the non-contact portion is formed in a peripheral edge portion of the through-hole.

5. The polarizing plate with a pressure-sensitive adhesive layer according to claim 1 , wherein the non-contact portion is formed in an outer edge portion of the polarizing plate.

6. The polarizing plate with a pressure-sensitive adhesive layer according to claim 5 , wherein the outer edge portion includes a site that forms a substantially V-shape that is convex inward in a plane direction.

7. An image display apparatus, comprising the polarizing plate with a pressure-sensitive adhesive layer of claim 1 .

8. A method of bonding a polarizing plate, comprising:
forming a pressure-sensitive adhesive layer on at least one surface of a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer; and
bonding the polarizing plate to an adherend through intermediation of the pressure-sensitive adhesive layer,
wherein in the surface of the polarizing plate where the pressure-sensitive adhesive layer is formed, a non-contact portion that is out of contact with the pressure-sensitive adhesive layer is formed in an end portion of the polarizing plate.

9. A method of producing a polarizing plate with a pressure-sensitive adhesive layer, comprising in the following order:
bonding, to a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer, a press lire-sensitive adhesive film including a resin film and a pressure-sensitive adhesive layer arranged on one surface of the resin film, the pressure-sensitive adhesive film having formed therein a penetration hole penetrating the resin film and the pressure-sensitive adhesive layer integrally; and
forming, at a position of the polarizing plate corresponding to the penetration hole of the pressure-sensitive adhesive film, a through-hole smaller than the penetration hole.

Assignees

• Nitto Denko Corp

Inventors

• Takada Katsunori
• Nakai Kota
• Higuchi Naotaka
• Nagano Shinobu
• Suefusa Eiko
• Kitamura Yoshitsugu
• Sugino Youichirou
• Kimura Keisuke

Classifications

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02B5/3025

  Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence) · CPC title

• B32B3/266

  characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12 · CPC title

• G02F2001/133541

  Physics · mapped topic

• G02B5/305

  including organic materials, e.g. polymeric layers · CPC title