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Retardation film process for producing same and display device using same

A technology of retardation film and manufacturing method, applied in chemical instruments and methods, instruments, layered products, etc., can solve the problems of intractability, high birefringence performance, low photoelastic constant, etc., to achieve high performance, bending Excellent properties and processability, low photoelastic constant

Inactive Publication Date: 2018-08-14
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, in order to obtain a film having both optical and mechanical properties, the types of monomers that can be used are special and limited, so it is difficult to obtain a film that has various physical properties such as optical and mechanical properties in a balanced manner.
[0008] Furthermore, these retardation films are very brittle, difficult to handle, and do not have the bend resistance required for flexible displays
[0009] Hitherto, for retardation films formed by orienting a laminate of resins having positive birefringence and resins having negative birefringence in at least a uniaxial direction, it has not been possible to obtain nearly ideal wavelength dispersion characteristics over a wide range, Retardation film with low photoelastic constant, high expression of birefringence, excellent flexibility and processability

Method used

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  • Retardation film process for producing same and display device using same
  • Retardation film process for producing same and display device using same
  • Retardation film process for producing same and display device using same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0156] 441 parts of isosorbide (hereinafter abbreviated as ISS), 66 parts of 1,9-nonanediol (hereinafter abbreviated as ND), 750 parts of diphenyl carbonate (hereinafter abbreviated as DPC) and tetramethylammonium hydroxide as a catalyst 0.8× 10 -2 parts and NaOH 0.6×10 -4 The parts were melted by heating to 180°C under a nitrogen atmosphere. Then, the degree of reduced pressure was adjusted to 13.4 kPa over 30 minutes. Then, the temperature was raised to 240° C. at a rate of 60° C. / hr, and the temperature was maintained for 10 minutes, and then the degree of reduced pressure was reduced to 133 Pa or less over 1 hour. The reaction was carried out under stirring for a total of 6 hours, discharged from the bottom of the reaction tank under nitrogen pressure, and cut with a pelletizer while cooling in a water tank to obtain copolymerized polycarbonate resin pellets as resin A.

manufacture example 2

[0158] Using 366 parts of ISS, 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5.5)undecane (hereinafter abbreviated as SPG) 219 parts, 33 parts of ND, except that, the same operation as the resin production example 1 was performed to obtain a copolymerized polycarbonate resin.

manufacture example 3

[0160] Except having used 366 parts of ISS, 125 parts of SPG, and 83 parts of ND, the same operation as resin manufacture example 1 was performed, and the copolymerized polycarbonate resin was obtained.

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PUM

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Abstract

The invention provides a phase difference film in which it has the chromatic dispersion characteristic approaching the broadband as to the phase difference film which at least 1 axially aligns the laminate laminating the layer consisting of the resin having the definition birefringence and the layer consisting of the resin having the birefringence of the part and the light elastic constant is lowand the emerging property of the birefringence is high and flexibility and workability are excellent. The phase difference film production method in which it is the resin in which the resin having thebirefringence of the part contains the styrene resin and the thickness ratio of the resin having the birefringence of the part and the resin having the definition birefringence of the relation of theinplane phase-difference value R550 in the in-plane phase-difference value R450 in 1: 1-2: 1, the wavelength 450 nm and wavelength 550 nm are the following equation (1) satisfied: 0.60<=R450 / R550<=0.95 (1).

Description

technical field [0001] The present invention relates to a retardation film made of a laminated body of a resin having positive birefringence and a resin having negative birefringence at least in a uniaxial direction, and a manufacturing method thereof, as well as a display device using the retardation film. The oriented retardation film has specific wavelength dispersion, has a low photoelastic constant, and is excellent in flexibility and processability. Background technique [0002] Generally, optical films, especially retardation films, are used in displays such as liquid crystal and organic EL display devices, and have functions such as color compensation, widening of viewing angle, and anti-reflection. Optical characteristics required for a retardation film include near-ideal wavelength dispersion characteristics over a wide range, a low photoelastic constant, and high birefringence expression. [0003] In recent years, flexibilization has been proposed for these displ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/13363C08G64/30C08G64/16
CPCC08G64/1608C08G64/305G02B1/04G02B5/3083G02F1/13363B32B27/08B32B27/302B32B27/36B32B2307/418B32B7/023C08L35/06C08L67/04G02B5/3041
Inventor 冈田阳平今里健太清水利行桧垣裕二山中克浩
Owner TEIJIN LTD
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