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

A manufacturing method and technology of optical film, applied in the field of optical film, capable of solving problems such as film breakage

Inactive Publication Date: 2011-09-14
KONICA MINOLTA OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is presumed that the cellulose melted in the extruder and the acrylic resin are weakly entangled with each other. When stretching is performed while cooling between the die and the cooling roll, the acrylic resin and the cellulose ester resin are weakly entangled with each other. The film is formed in the state, and the film is prone to breakage due to the application of conveying stress on it.

Method used

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

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Embodiment 1

[0349] [Preparation of acrylic resin]

[0350] As the acrylic resin used in the present invention, the following commercially available acrylic resins were used.

[0351] Daiyanaichiru BR83 (manufactured by Mitsubishi Rayon Co., Ltd.) Mw40000

[0352] Dayanaichiru BR85 (manufactured by Mitsubishi Rayon Co., Ltd.) Mw280000

[0353] Acrypet VH-4 (manufactured by Mitsubishi Rayon Co., Ltd.) Mw140000

[0354] Acrypetus V (manufactured by Mitsubishi Rayon Co., Ltd.) Mw105000

[0355] The ratio of the MMA unit in the molecule in the acrylic resin used in the present invention is 90% by mass or more and 99% by mass or less.

[0356] [Preparation of acrylic particles]

[0357]

[0358] In a reactor with an internal volume of 60 liters and a reflux condenser, 38.2 liters of ion-exchanged water and 111.6 g of sodium dioctyl sulfosuccinate were put in, stirred at a rotation speed of 250 rpm, and the temperature was raised to 75 ° C under a nitrogen atmosphere at the same time, Mak...

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Abstract

Disclosed is an optical film mainly composed of an acrylic resin and a cellulose ester resin. The optical film is prevented from breakage due to conveyance stress during melt film formation, and does not cause light leakage when used in a polarizing plate. Also disclosed is a polarizing plate using the optical film, and a liquid crystal display device. The optical film is characterized by containing an acrylic resin (A) and a cellulose ester resin (B), which are mixed at a mass ratio of from 50:50 to 95:5, and additionally containing a phosphorus additive selected from phosphinite, phosphonite and phosphite.

Description

technical field [0001] The present invention relates to an optical film, its manufacturing method, a polarizing plate and a liquid crystal display device using the same. Background technique [0002] Liquid crystal display devices are in increasing demand for applications such as liquid crystal televisions and personal computer liquid crystal displays. Generally, a liquid crystal display device is composed of a liquid crystal cell with a transparent electrode, a liquid crystal layer, a color filter, etc. sandwiched between glass plates, and two polarizers arranged on both sides thereof. Sheet protective film) sandwiches the polarizer (also called polarizing film, polarizing film). As the polarizing plate protective film, a cellulose triacetate film is generally used. [0003] On the other hand, due to technological progress in recent years, liquid crystal display devices have been rapidly increased in size, and at the same time, applications of liquid crystal display devic...

Claims

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Application Information

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IPC IPC(8): C08L33/00C08K5/53C08L1/10G02B5/30G02F1/1335
CPCC08L33/08C08K5/51G02F1/133528C08L1/14C08L33/00C08L1/10G02B5/3033C08L2666/04C08L2666/02
Inventor R·山田
Owner KONICA MINOLTA OPTO
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