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Optically functional film

A technology of optical function and optical function layer, applied in optics, optical components, thin material processing, etc., can solve the problems of poor fingerprint resistance, poor resistance to marking ink, etc.

Inactive Publication Date: 2009-09-02
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although silane-based compounds are good in marking ink resistance, sliding properties, and hydrophobicity, on the contrary, they have a problem of poor fingerprint resistance
On the other hand, although fluorine-based compounds are good in fingerprint resistance and hydrophobicity, they have the problem of poor resistance to marking inks
Therefore, attempts have been made to mix or copolymerize such a silane-based compound and a fluorine-based compound to combine the advantages of both (Patent Document 1, Patent Document 2), but it is not possible to obtain both advantages while satisfying fingerprint resistance, Anti-magic maker properties, sliding properties, hydrophobic substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] (1) Formation of hard coating

[0217] (Preparation of composition for forming a hard coat layer)

[0218] Components of the following compositions were mixed to prepare a composition for forming a hard coat layer.

[0219] ・Pentaerythritol triacrylate (PET-30: trade name, manufactured by Nippon Kayaku); 30.0 parts by mass

[0220] ・Egacure 907 (trade name, manufactured by Chiba Special Chemicals Co., Ltd.): 1.5 parts by mass

[0221] Methyl isobutyl ketone: 73.5 parts by mass

[0222] (production of hard coat)

[0223] On a triacetyl cellulose (TAC) film with a thickness of 80 μm, the composition for forming a hard coat layer prepared above was bar-coated, and after removing the solvent by drying, a radiation dose of about 20 mJ / cm was applied using an ultraviolet irradiation device. 2 The coating film was cured by ultraviolet irradiation to obtain a laminated film having a hard coat layer having a film thickness of 10 μm and consisting of a base material / hard coat...

Embodiment 2

[0237] Except that the composition for forming the low refractive index layer is made into the following components, it is carried out in the same manner as in Example 1 to obtain a substrate / hard coat layer / low refractive index layer / antifouling layer (formed by exudation). Optical functional film with layer structure.

[0238] (Composition for forming a low refractive index layer)

[0239] ・Hollow silica microparticle dispersion (hollow silica methyl isobutyl ketone sol; average particle diameter 50 nm, solid content 20%, manufactured by Catalyst Chemical Industry Co., Ltd.); 13.6 parts by mass

[0240] Pentaerythritol triacrylate (PET-30: trade name, manufactured by Nippon Kayaku); 1.8 parts by mass

[0241] ・Egacur 127 (trade name, manufactured by Chiba Special Chemicals Co., Ltd.): 0.1 parts by mass

[0242] · ZX-007C (solid content 35%, trade name, manufactured by Fuji Chemical Industries, fluororesin / siloxane graft type polymer); 0.5 parts by mass

[0243]5088X (trad...

Embodiment 3

[0246] (1) Formation of substrate / hard coat layer / low refractive index layer

[0247] It carried out similarly to Example 1, and obtained the laminated film which has a base material / hard-coat layer structure. Next, the composition for forming a low-refractive index layer was made to have the following composition, and a low-refractive index layer was formed on the laminated film.

[0248] (Composition for forming a low refractive index layer)

[0249] ・Hollow silica microparticle dispersion (hollow silica methyl isobutyl ketone sol; average particle diameter 50 nm, solid content 20%, manufactured by Catalyst Chemical Industry Co., Ltd.); 16.4 parts by mass

[0250] Pentaerythritol triacrylate (PET-30: trade name, manufactured by Nippon Kayaku); 1.6 parts by mass

[0251] ・Egacur 127 (trade name, manufactured by Chiba Special Chemicals Co., Ltd.): 0.1 parts by mass

[0252] Methyl isobutyl ketone: 81.9 parts by mass

[0253] (2) Formation of antifouling layer

[0254] Com...

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Abstract

An optically functional film provided at its outermost surface with an antifouling layer that simultaneously attains imperviousness to fingerprint, imperviousness to marking ink, slipperiness and water repellency. The optically functional film is one comprising a substratum, an optically functional layer superimposed on the substratum and an antifouling layer superimposed on the optically functional layer, wherein the antifouling layer exhibits element proportions of 0.25 to 1.0 Si / C, meaning a ratio of silicon element (Si) to carbon element (C), and 0.10 to 1.0 F / C, meaning a ratio of fluorine element (F) to carbon element (C), and the antifouling layer has the following properties: (a) liquid paraffin contact angle of 65 DEG or greater and liquid paraffin fall angle of 15 DEG or below, (b) black marking ink contact angle of 35 DEG or greater and black marking ink fall angle of 15 DEG or below, and (c) dynamic friction coefficient of below 0.15.

Description

technical field [0001] The present invention relates to an optically functional film suitable for use as the outermost layer of a display such as a liquid crystal display device, and having an antifouling layer having excellent fingerprint resistance, marking ink resistance, and sliding properties on the outermost surface. Background technique [0002] Displays of TVs, personal computers, mobile phones, etc., back mirrors, goggles, window glass, and other commercial displays must have anti-reflection surfaces to read displayed text, graphics, and other information. Anti-reflection or anti-glare properties, conductivity for shielding electromagnetic waves, barrier properties such as rust, light diffraction properties such as holograms (holographs) for improved design or security, and / or protection against damage due to external forces Hard coating and other functionalities. Therefore, an optically functional film having these functions is generally provided on the surface of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10B32B7/02B32B9/00
CPCG02B1/105G02B27/0006Y10T428/31G02B1/14G02B1/18
Inventor 筱原诚司
Owner DAI NIPPON PRINTING CO LTD
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