Invention Grant
- Patent Title: Method for manufacturing optical film-forming pressure-sensitive adhesive layer, optical film-forming pressure-sensitive adhesive layer, pressure-sensitive adhesive-type optical film, and image display device
- Patent Title (中): 光学成膜压敏粘合剂层的制造方法,光学成膜压敏粘合剂层,压敏粘合型光学膜和图像显示装置
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Application No.: US13626159Application Date: 2012-09-25
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Publication No.: US09181458B2Publication Date: 2015-11-10
- Inventor: Taiki Shimokuri , Kunihiro Inui , Toshitaka Takahashi , Yousuke Makihata , Toshitsugu Hosokawa , Takaaki Ishii
- Applicant: NITTO DENKO CORPORATION
- Applicant Address: JP Ibaraki-shi
- Assignee: NITTO DENKO CORPORATION
- Current Assignee: NITTO DENKO CORPORATION
- Current Assignee Address: JP Ibaraki-shi
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2011-209331 20110926
- Main IPC: B05D5/10
- IPC: B05D5/10 ; C09J7/02 ; C09J133/08

Abstract:
An object of the present invention is to provide a method for manufacturing an optical film-forming pressure-sensitive adhesive layer, which can reduce the problem with visibility without a reduction in productivity, such as a reduction in coating speed. A method for manufacturing an optical film-forming pressure-sensitive adhesive layer, comprising the steps of: (1) applying, to a release film, an aqueous dispersion-type pressure-sensitive adhesive including an aqueous dispersion containing a (meth)acryl-based polymer in the form of an aqueous dispersion; and (2) drying the applied aqueous dispersion-type pressure-sensitive adhesive, wherein the aqueous dispersion-type pressure-sensitive adhesive has a viscosity of 0.01 Pa·s to 0.1 Pa·s at a shear rate of 4,000 (l/s), the optical film-forming pressure-sensitive adhesive layer formed on the release film has a surface roughness (Ra) of 10 nm to 40 nm, and the optical film-forming pressure-sensitive adhesive layer has a haze of 1% or less.
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