Antidazzle optical film and preparation method thereof

A technology of optical film and resin film, which is applied in the field of anti-glare optical film of polarizer and its preparation, can solve the problems of no anti-glare optical film and its preparation method, obtain visibility, inconvenience, etc., and achieve high anti-glare effect, whitening Effect of reducing phenomenon and improving visibility

Active Publication Date: 2008-01-30
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conventionally known antiglare-treated film does not necessarily have a sufficient effect of preventing the aforementioned whitening phenomenon, and it cannot be said that sufficient visibility is obtained.
[0012] This shows that above-mentioned existing anti-glare optical film and preparation method thereof obviously still have inconvenience and defect in method and use, and urgently need to be further improved
In order to

Method used

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  • Antidazzle optical film and preparation method thereof
  • Antidazzle optical film and preparation method thereof
  • Antidazzle optical film and preparation method thereof

Examples

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preparation example Construction

[0076] A method of producing a film having a specific surface shape as another item of the present invention will be explained below.

[0077] In the present invention, glass having fine irregularities formed on the surface by a prescribed method is used as an embossing template. As a starting sheet for this embossing template, SiO 2 General-purpose glass as the main ingredient. The glass may be soda lime glass called blue glass, borosilicate glass called white glass, or quartz glass. The glass used is not limited as long as it can be etched with an aqueous solution containing hydrogen fluoride and dissolved isotropically with the solution. However, since glass is subjected to a heat-pressing step when transferring fine irregularities made by etching onto a transparent resin film, or when a transparent substrate coated with an ionizing radiation-curable resin is adhered to an irregular surface, The state is subjected to exposure to ionizing radiation, so glass is expected t...

Embodiment 1

[0125] Soda lime glass having a thickness of 1.1 mm obtained from Nippon Sheet Glass Co., Ltd. Sandblasting. The blasting pressure is 0.5kg / cm 2 (50kPa), the blasting time is 120 seconds. The thus-blasted glass was ultrasonically washed, dried, immersed in 10% by weight of hydrofluoric acid at 40°C for 1200 seconds, sufficiently washed with pure water, and then dried to obtain a template glass.

[0126] 10 g of urethane acrylate ultraviolet curing resin "UA-1" obtained from Shin-Nakamura Chemical Co., Ltd., and 0.5 g of photopolymerization initiator "Lucirin TPO" (chemical name: 2,4 , 6-trimethylbenzoyldiphenylphosphine oxide) was dissolved in 10 g of ethyl acetate to prepare a coating solution. This coating solution was coated on one side of an 80 μm thick triacetylcellulose film obtained from Fuji Photo Film Co., Ltd. with a #16 bar coater in the dark. Let it dry in an oven at 80° C. for 5 minutes, use a hand push roller to adhere the coated surface in an uncured state t...

Embodiment 2

[0131] An anti-glare optical film was prepared in the same manner as in Example 1, except that the blasting particles were changed to monodisperse aluminum crystals "Sumicorundum AA-18" (average particle diameter: 18 μm) obtained from Sumitomo Chemical Co., Ltd., the blasting particles were The sand pressure is 0.4kg / cm 2 (40kPa), and the blasting time is 120 seconds. The optical properties and visual evaluation results of the obtained films are shown in Table 1. It was found that the film also had sufficient anti-glare properties and anti-whitening ability.

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Abstract

An object of the present invention is to provide an anti-glare optical film which reduces in whitening of a screen without sacrificing anti-glare property, and a process for preparing the same. There is provided an anti-glare optical film having irregularities on the surface, wherein a ratio of areas of the surface having an inclination angle of 1 DEG or less is 20% or less, a ratio of areas of the surface having an inclination angle of 5 DEG or more is 20% or less, and a standard deviation of a height of the surface is 0.2 mum or less. There is also provided a process for preparing an anti-glare optical film, comprising the steps of contacting a glass with an aqueous solution containing hydrogen fluoride to obtain a template which comprises the glass having the surface on which a fine irregular shape is formed so that approximately spherical concave shapes are arranged to be substantially compact, and transferring the irregular shape of the surface of the template onto the surface of a resin film.

Description

[0001] This application is a divisional application of a patent application with an application date of August 9, 2004, an application number of 200410055167.4, and an invention title of "anti-glare optical film and its preparation method". technical field [0002] The invention relates to an anti-glare optical film and a preparation method thereof, in particular to an anti-glare optical film used for a polarizer of an image display device and a preparation method thereof. Background technique [0003] The visibility of image display devices, including liquid crystal display devices, is significantly reduced when outdoor light is reflected on its image display surface. In applications that require high-quality images—such as televisions and personal computers, in outdoor applications where there is strong outdoor light—such as video cameras and digital cameras, and in applications that use reflected light for display—such as mobile phones In reflective liquid crystal display...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02F1/1335
Inventor 波冈诚桑原真人
Owner SUMITOMO CHEM CO LTD
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