Phase difference film and production method for same

A technology of retardation film and manufacturing method, applied in chemical instruments and methods, instruments, polarizing elements, etc., can solve problems such as difficulty in manufacturing retardation film, and achieve the effects of small NZ coefficient, easy manufacture and high visibility

Active Publication Date: 2018-06-08
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a manufacturing method, it is diffic

Method used

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  • Phase difference film and production method for same
  • Phase difference film and production method for same
  • Phase difference film and production method for same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0199] Example

[0200] Examples are shown below to specifically explain the present invention. However, the present invention is not limited to the examples shown below, and can be implemented with arbitrarily changed without departing from the scope of the present invention and the scope equivalent thereto.

[0201] In the following description, unless otherwise specified, the "%" and "parts" indicating the amount are based on weight. In addition, unless otherwise specified, the operations described below are performed under normal temperature and normal pressure conditions.

[0202] [Evaluation method]

[0203] [Measurement method of weight average molecular weight and number average molecular weight]

[0204] The weight average molecular weight and number average molecular weight of the polymer were measured as polystyrene conversion values ​​using a gel permeation chromatography (GPC) system ("HLC-8320" manufactured by To Soh). In the measurement, an H-type column (manufactured ...

Example Embodiment

[0213] [Production Example 1: Production of hydrogenated product of ring-opening polymer of dicyclopentadiene]

[0214] After the metal pressure-resistant reactor is sufficiently dried, nitrogen substitution is performed. In this metal pressure-resistant reactor, 154.5 parts of cyclohexane and 42.8 parts of dicyclopentadiene (with an internal content of 99% or more) were added to a 70% cyclohexane solution (dicyclopentane The amount of diene is 30 parts) and 1.9 parts of 1-hexene, heated to 53°C.

[0215] 0.014 parts of tungsten tetrachloride phenylimide (tetrahydrofuran) complex was dissolved in 0.70 parts of toluene to prepare a solution. Add 0.061 parts of 19% diethylaluminum ethoxide / n-hexane solution to this solution, and stir for 10 minutes to prepare a catalyst solution.

[0216] The catalyst solution is added to a pressure-resistant reactor to initiate a ring-opening polymerization reaction. Then, it was made to react for 4 hours while maintaining 53 degreeC, and the solut...

Example Embodiment

[0227] [Production Example 2-1: Production of Raw Film 1]

[0228] The pelletized molded body obtained in Production Example 1 was used in a hot melt extrusion film molding machine with a T-die (product name "Measuring Extruder TypeMe-20 / 2800V3", manufactured by Optical Control Systems), and the thickness was 200μm A method in which a film with a width of 120 mm is wound on a roll at a speed of 1.5 m / min to obtain a film formed body (hereinafter, may be referred to as a raw film 1).

[0229] The operating conditions of the film forming machine are as follows.

[0230] ·Cylinder temperature setting=280℃~290℃

[0231] ·Die head temperature=270℃

[0232] ·Screw speed = 30rpm

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Abstract

Provided is a phase difference film that comprises a resin including a crystalline polymer. Further provided is a production method which includes: a bonding step for obtaining a third film by bondinga second film to one or both surfaces of a first film comprising a resin that includes the crystalline polymer, has a glass transition temperature of Tg ( DEG C), and a melting point of Tm ( DEG C),wherein the second film has a shrinkage factor of 5-50% in at least one direction in (Tg+30) DEG C; a shrinking step for heating the third film to Tg DEG C to (Tg+30) DEG C, shrinking in at least onedirection, and shrinking the area thereof 5-50% to obtain a fourth film; and a secondary heating step for heating the fourth film to from (Tg+50) DEG C to (Tm-40) DEG C. The NZ coefficient is less than 1.

Description

technical field [0001] The present invention relates to a retardation film and a manufacturing method thereof. Background technique [0002] In display devices such as liquid crystal display devices, various retardation films are often provided. [0003] As a method for producing a retardation film, a method of imparting optical anisotropy by stretching an isotropic raw material film is widely used. However, in such a manufacturing method, it is difficult to manufacture a certain type of retardation film. For example, it is difficult to obtain a film having an NZ coefficient of less than 1, such as a three-dimensional retardation film, a negative A-plate, or a positive C-plate, simply by stretching an isotropic film. [0004] As a method of obtaining a retardation film having a small NZ coefficient value, several methods have been proposed. As one of them, there is known a method including bonding a raw material film and a shrinkable film together to obtain a laminated fi...

Claims

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Application Information

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IPC IPC(8): G02B5/30B42D25/328B42D25/364G02B5/18G02B5/32
CPCG02B5/3083B32B27/08B32B38/0012B32B38/0036C08G61/06C08L65/00C08G2261/3321B42D25/364B42D25/328G02B5/32G02B5/18G02B5/30G02F1/133638C08G61/08C08G2261/3324C08G2261/418C08J5/18C08J2365/00G02F1/133634
Inventor 村上俊秀
Owner ZEON CORP
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