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Optical film, method for producing same, polarizing plate, and display device

A manufacturing method and technology of optical films, which are applied in the directions of optics, polarizing elements, lighting devices, etc., to achieve the effects of sufficient film thickness, good adhesion and thin film thickness

Pending Publication Date: 2022-07-12
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem in the case of producing an optical film made of a cycloolefin resin by reducing the film thickness at the initial stage of casting has been studied using the phase difference increasing agent disclosed in Patent Document 1. As a result, the above-mentioned problem has not been solved. question

Method used

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  • Optical film, method for producing same, polarizing plate, and display device
  • Optical film, method for producing same, polarizing plate, and display device
  • Optical film, method for producing same, polarizing plate, and display device

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Embodiment

[0316] The present invention will be specifically described below with reference to Examples, but the present invention is not limited to these Examples. In addition, although the representation of "part" or "%" is used in an Example, unless otherwise indicated, "mass part" or "mass %" are represented.

[0317] [Optical film]

[0318] 1. The material of the optical film

[0319] (1) Cycloolefin resin

[0320] As the cycloolefin resin having a polar group, a cycloolefin resin A composed of a unit having a structure represented by the following formula (I) was used (in the formula (I), R is CH 3 ). In addition, as the cycloolefin resin having no polar group, the cycloolefin resin B composed of a unit having a structure in which the group represented by COOR in the following formula (I) was substituted with a hydrogen atom was used.

[0321] [hua 5]

[0322] Formula (I)

[0323]

[0324] (2) Additives

[0325] (2-1) Compound (1)

[0326] As compound (1), compounds 1-1 ...

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Abstract

An optical film containing a cycloolefin resin and a compound having a structure represented by general formula (1). (Y represents an aromatic heterocycle having 5-20 elements, X1 and X2 represent substituted or unsubstituted aromatic ring groups that form a single bond with the atoms constituting Y, and R represents a hydrogen atom, a cyano group, a hydroxyl group, or an alkyl group having 1-10 carbon atoms, or two groups of R represent = O. And n is the valence of Y and is an integer of 2 or more. The angle formed by a straight line L1 connecting the center of Y and the center of the ring farthest from Y among the rings constituting X1 and a straight line L2 connecting the center of Y and the center of the ring farthest from Y among the rings constituting X2 is 110-145 DEG. )

Description

technical field [0001] The present invention relates to an optical film and its manufacturing method, a polarizing plate, and a display device. More specifically, the present invention relates to an optical film having a sufficiently thin film thickness, obtaining a desired optical compensation value (retardation), and having good adhesion to a polarizer, a method for producing the same, a polarizing plate including the optical film, and display device. Background technique [0002] In recent years, the reduction in thickness of the display device has been strongly desired, and along with this, the reduction in the thickness of the resin-made protective film used for the polarizing plate included in the display device has also been strongly desired. In the polarizer, the protective film is disposed on both surfaces of the polarizer by adhesion or the like. As a protective film, an optical film whose retardation is controlled in order to compensate for a change in retardati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B29C55/02H01L27/32G02F1/13363H05B33/02H01L51/50
CPCB29C55/02G02B5/30G02F1/13363H05B33/02H10K59/8791C08J5/18C08L23/00
Inventor 松本彩花大泽祥畠泽翔太
Owner KONICA MINOLTA INC
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