IP Library Granted Patent US 10,139,671
Granted Patent B2
US 10,139,671 · App. 15/341,101 · Granted Nov 27, 2018

Polarizing plate with pressure-sensitive adhesive layer

Inventors: Katsunori Takada (Ibaraki, JP); Kota Nakai (Ibaraki, JP); Naotaka Higuchi (Ibaraki, JP); Shinobu Nagano (Ibaraki, JP); Eiko Suefusa (Ibaraki, JP); Yoshitsugu Kitamura (Ibaraki, JP); Youichirou Sugino (Ibaraki, JP); Keisuke Kimura (Ibaraki, JP)
Assignee: NITTO DENKO CORPORATION
G02F1/133528B32B3/266B32B7/12B32B37/12B32B37/14G02B5/305G02B5/3033G02B5/3041B29D11/00644B32B2307/42G02B5/30G02B5/3025G02F2001/133541G02F2202/28
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Quick Facts
Patent No.
US 10,139,671
App. No.
15/341,101
Granted
Nov 27, 2018
Kind
B2
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.

Claims (17)

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.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 23, 2016
From: TAKADA, KATSUNORI; NAKAI, KOTA; HIGUCHI, NAOTAKA; NAGANO, SHINOBU; SUEFUSA, EIKO; KITAMURA, YOSHITSUGU; SUGINO, YOUICHIROU; KIMURA, KEISUKE
To: NITTO DENKO CORPORATION
Reel/Frame 040412/0983 →
Priority Claims (2)
JP 2015-216369 · Nov 4, 2015 · national
JP 2016-176171 · Sep 9, 2016 · national
Continuity (1)
Related Publication 20170123266A1 · May 4, 2017