Optical film with pressure sensitive adhesive and production method thereof, and method for producing image display device
AssigneeNitto Denko Corporation
InventorsShou TAKARADA, Masaki MIZUTANI, Atsushi YASUI
Life of this patent
Estimating the term…
Abstract
The optical film with a pressure sensitive adhesive comprises an optical film including a polarizing plate, a first pressure sensitive adhesive layer provided on first main surface of the optical film, and a second pressure sensitive adhesive layer provided on second main surface of the optical film. The first pressure sensitive adhesive layer has a thickness of 30 μm or more. In the first pressure sensitive adhesive layer, a fluidity of a pressure sensitive adhesive at an end surface is lower than a fluidity of the pressure sensitive adhesive at an in-plane central part.
Claims15
An optical film with a pressure sensitive adhesive, which is to be disposed between a front transparent plate or a touch panel and an image display cell, wherein
- the optical film with a pressure sensitive adhesive comprises:
- an optical film including a polarizing plate;
- a first pressure sensitive adhesive layer provided on first main surface of the optical film, which is to be bonded to a front transparent plate or a touch panel;
- and a second pressure sensitive adhesive layer provided on second main surface of the optical film, which is to be bonded to an image display cell,
- the first pressure sensitive adhesive layer has a thickness of 30 μm or more, and in the first pressure sensitive adhesive layer, a fluidity of a pressure sensitive adhesive at an end surface is lower than a fluidity of the pressure sensitive adhesive at an in-plane central part.
A method for producing an image display device, the image display device comprising:
- a front transparent plate or a touch panel;
- an optical film including a polarizing plate;
- and an image display cell, arranged in this order from a viewing side, wherein
- the method comprising:
- providing an optical film with a pressure sensitive on both sides which comprises an optical film, a first pressure sensitive adhesive layer provided on first main surface of the optical film, and a second pressure sensitive adhesive layer provided on second main surface of the optical film,
- bonding the second main surface of the optical film and the image display cell to each other with the second pressure sensitive adhesive layer interposed therebetween;
- and
- bonding the first main surface of the optical film and the front transparent plate or the touch panel to each other with the first pressure sensitive adhesive layer interposed therebetween, wherein
- the optical film includes a polarizing film,
- the first pressure sensitive adhesive layer has a thickness of 30 μm or more, and
- before bonding the optical film and the front transparent plate or the touch panel to each other with the first pressure sensitive adhesive layer, a fluidity of a pressure sensitive adhesive at an end surface of the first pressure sensitive adhesive layer is lower than a fluidity of a pressure sensitive adhesive at an in-plane central part of the first pressure sensitive adhesive.
Dependencies are inferred from the claim text.