Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of manufacturing optical film, optical film, polarizing plate, optical compensation film, antireflection film and liquid crystal display device

A technology of optical thin film and manufacturing method, applied in the direction of optics, polarizing elements, optical elements, etc., can solve problems such as thin film optical properties that have not been studied in detail

Inactive Publication Date: 2010-05-12
FUJIFILM CORP
View PDF137 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is currently no known method of producing an optical film having sufficient performance for optical compensation of a transmissive TN or ECB liquid crystal display device or a semi-transmissive TN or ECB liquid crystal display device
Moreover, the relationship between the optical properties of the above-mentioned thin films and the characteristics of the internal structure of the thin films has not been studied in detail.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of manufacturing optical film, optical film, polarizing plate, optical compensation film, antireflection film and liquid crystal display device
  • Method of manufacturing optical film, optical film, polarizing plate, optical compensation film, antireflection film and liquid crystal display device
  • Method of manufacturing optical film, optical film, polarizing plate, optical compensation film, antireflection film and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0356] [Production Example 1] Production of Cyclic Olefin Copolymer Particles

[0357] As the cyclic olefin copolymer, "TOPAS #6013" pellets manufactured by Polyplastics Co., Ltd. were used. In addition, "TOPAS#6013" showed positive intrinsic birefringence. In addition, the glass transition temperature of this resin was 136 degreeC.

manufacture example 2

[0358] [Production Example 2] Production of Acrylic Cellulose Granules

[0359] Cellulose acetate propionate (CAP) was produced by the method described in Example 1 of JP-A-2006-348123, and granulated by a conventional method. In the CAP composition used, the degree of acetylation was 0.15, the degree of propionylation was 2.60, the degree of substitution of all acyl groups was 2.75, and the number average degree of polymerization DPn=118, showing positive intrinsic birefringence. In addition, the glass transition temperature of this resin was 137°C.

manufacture example 3

[0360] [Production Example 3] Production of polycarbonate pellets

[0361] As the polycarbonate, "Teflon MD1500" pellets manufactured by Idemitsu Kosan Co., Ltd. were used. In addition, "Teflon MD1500" showed positive intrinsic birefringence. In addition, the glass transition temperature of this resin was 142 degreeC.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A method for producing an optical film comprising leading a melt of a composition containing a thermoplastic resin to pass between a first nip-pressing surface and a second nip-pressing surface of a nip-pressing unit whereby the melt is continuously nip-pressed therebetween to form a film, wherein the nip-pressing unit applies a pressure of from 20 to 500 MPa to the melt, and the first nip-pressing surface moves at a higher speed than the second nip-pressing surface.

Description

technical field [0001] The present invention relates to a method for manufacturing an optical film. It also relates to an optical film produced by the production method, an optical film having a special internal structure, a polarizing plate having the film, and a liquid crystal display device. Background technique [0002] In recent years, with the prosperity of the liquid crystal display device market, various thin films are being developed. For example, Patent Documents 1 to 3 disclose oblique retardation films. [0003] For example, Patent Document 1 describes a method in which a film is passed between two rollers with different peripheral speeds, thereby imparting a shear force to the film, and its application to a TN-type liquid crystal display device. , so as to produce a film with a tilted optical axis. However, in the method described in the above-mentioned document 1, there are problems such as the unevenness of the optical properties of the film is serious, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/22B29C43/58B29C43/46G02B5/30G02F1/1335G02F1/13363B29C48/08B29C48/305
CPCB29C55/00B29C55/143B29C55/08B29C55/06G02B5/3083B29C55/146B29C48/08B29C48/914B29C48/916B29C48/9165B29C48/917B29C48/919Y10T428/263C09K2323/00G02F1/1335G02B5/30G02F1/13363
Inventor 竹上龙太则常雅彦林直毅
Owner FUJIFILM CORP