Method of producing polarizing plate

Patent metadata

Field	Value
Publication number	US-11022735-B2
Application number	US-201916676615-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Nov 4, 2015
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.

First claim

What is claimed is:

1. A method of producing a polarizing plate, comprising:
preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer;
shrinking the polarizing film laminate; and
cutting the polarizing film laminate,
wherein the cutting forms one selected from the group consisting of a through-hole, a site whose outer edge forms a V-shape that is convex inward in a plane direction, a site whose outer edge forms an R-shape that is convex inward in a plane direction, and the combination thereof, on the polarizing film laminate.

2. The production method according to claim 1 , wherein shrinking the polarizing film laminate is performed in a transmission axis direction of the polarizer by 0.2% or more.

3. The production method according to claim 1 , wherein the shrinking the polarizing film laminate is performed after cutting the polarizing film laminate.

Assignees

• Nitto Denko Corp

Inventors

• Takada Katsunori
• Nagano Shinobu
• Suefusa Eiko
• Kitamura Yoshitsugu
• Kimura Keisuke
• Kuramoto Hiroki
• Sugino Youichirou

Classifications

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• G02B5/305 Primary

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

• B29C61/02

  Thermal shrinking · CPC title

• B32B7/023

  Optical properties · CPC title

• B29D11/0073

  Optical laminates · CPC title