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Optical film, manufacturing method thereof, polarizer and liquid crystal panel

An optical film, liquid crystal panel technology, applied in chemical instruments and methods, optics, optical components, etc., can solve the problems of inability to obtain optical wide-width films, difficulty in film thickness uniformity, and low film yield, and achieve excellent transparency. , Film thickness uniformity and excellent surface smoothness, excellent surface smoothness effect

Active Publication Date: 2011-03-23
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to maintain the uniformity of film thickness in the width direction when producing wide-width optical films industrially.
In addition, there is a problem that even when the above-mentioned die lines are slightly generated, an optically homogeneous wide-width film cannot be obtained, and the yield of the film is very low.

Method used

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  • Optical film, manufacturing method thereof, polarizer and liquid crystal panel
  • Optical film, manufacturing method thereof, polarizer and liquid crystal panel
  • Optical film, manufacturing method thereof, polarizer and liquid crystal panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0251] Hereinafter, specific examples of the present invention will be described, but the present invention is not limited to these examples. In addition, unless otherwise specified, the following "part" and "%" mean "weight part" and "weight%".

[0252] In addition, in the following examples, glass transition temperature, total light transmittance, haze, in-plane phase difference of transmitted light, transmittance and polarization degree of polarizer, thickness distribution of film and MFR, are used The following method was used for measurement.

[0253] [Glass transition temperature (Tg)]

[0254] The glass transition temperature was measured using a differential scanning calorimeter (DSC) manufactured by Seiko Instruments Co., Ltd. under a nitrogen atmosphere at a temperature increase rate of 20° C. / min.

[0255] [Total light transmittance, haze]

[0256] The total light transmittance and haze were measured using a haze meter "HM-150 type" manufactured by Murakami Color...

preparation example 1

[0266] Put 250 parts of distilled water in the reaction vessel, add 90 parts of butyl acrylate, 8 parts of methacrylate-2-hydroxyethyl ester, 2 parts of divinylbenzene and 0.1 part of potassium oleate in the reaction vessel, then the The system was stirred with a stirring blade made of polytetrafluoroethylene (Teflon: registered trademark) to perform dispersion treatment. Then, after replacing the inside of the reaction container with nitrogen, the temperature of the system was raised to 50° C., and 0.2 parts of potassium persulfate was added to initiate polymerization. After 2 hours had elapsed from the start of the polymerization, 0.1 part of potassium persulfate was further added to the polymerization reaction system, the temperature of the system was raised to 80° C., and the polymerization reaction was continued for 1 hour to obtain a polymer dispersion.

[0267] Then, the polymer dispersion was concentrated to a solid content concentration of 70% using an evaporator to o...

Synthetic example 1-1

[0272] 8-methyl-8-carboxymethyltetracyclo[4.4.0.1 2，5 .1 7，10 225 parts of ]-3-dodecene, 25 parts of bicyclo[2.2.1]hept-2-ene as a specific monomer b, 27.0 parts of 1-hexene as a molecular weight regulator, and 750 parts of toluene as a solvent. The solution was heated to 60°C. Then, 0.62 parts of a toluene solution containing 1.5 mol / liter of triethylaluminum as a polymerization catalyst and tungsten hexachloride modified with tert-butanol and methanol (tert-butanol:methanol) were added to the solution in the reaction vessel. : tungsten=0.35 mole: 0.3 mole: 1 mole) concentration is 3.7 parts of toluene solution of 0.05 mole / liter, this system is heated and stirred at 80 ℃ for 3 hours, thus makes it carry out ring-opening copolymerization reaction, obtains ring-opening Copolymer solution.

[0273] The polymerization conversion rate in this polymerization reaction was 97%, and the intrinsic viscosity (η inh ), which is 0.507dl / g.

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Abstract

The invention provides optical thin film of broad width with excellent film thickness uniformity and surface smoothness uniformity. The optical thin film is composed of annular alkenes resin, the width of which is above 10000 millimeter, the characteristic of which is that the thin film with the measurement of 100 millimeter multiplied by 500 millimeter is cut along the direction of the thin filmwidth per 100 millimeter as sample. The deviation of melt flow rate is less than above or below 5%, according to the JISK7210 determining melt flow rate (MFR) with 260 centidegree, 98N load.

Description

technical field [0001] The present invention relates to an optical film composed of a cyclic olefin resin and excellent in film thickness uniformity and surface smoothness, a method for producing the optical film, and a polarizing plate and a liquid crystal panel using the optical film. Background technique [0002] Cyclic olefin-based resins are suitable for use in optical films because they are excellent in transparency, heat resistance, moisture resistance, and the like. Generally, a film made of a cyclic olefin resin is produced by forming a film by a solution casting method (solution casting method) or a melt extrusion method, and stretching it as necessary. [0003] An optical film is required to have excellent optical properties such as transparency, and it is also important that the film is homogeneous and has little optical unevenness (optical unevenness). As a method of producing an optical film by preventing or suppressing optical unevenness generated during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02B1/04C08J5/18G02F1/1335
CPCB29C55/02B29D11/0073B29D11/00788B32B27/08B32B27/32C08J5/18C08J2323/02C08L23/02G02B1/04G02B5/305
Inventor 鹫见浩一冈庭求树山崎大辅横山功
Owner JSR CORPORATIOON