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Process for production of hard coat film

A manufacturing method, a technology for hard coating films, applied in the directions of chemical instruments and methods, devices for applying liquid to surfaces, coatings, etc.

Active Publication Date: 2014-12-24
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a thin-film optical film with a thin film thickness is formed by a solution casting method, as described above, flaws transferred from the support remain on the surface of the support side during casting of the thin-film optical film, so the film is formed on both sides of the thin-film optical film. Impossible without damage

Method used

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  • Process for production of hard coat film
  • Process for production of hard coat film
  • Process for production of hard coat film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0279] (Production of cellulose ester film)

[0280] · Preparation of silica dispersion

[0281] AEROSIL R812 (manufactured by Japan Aerosil Co., Ltd.) 10 parts by mass

[0282] (The average diameter of primary particles is 7nm)

[0283] 90 parts by mass of ethanol

[0284] The above materials were stirred and mixed with a dissolver for 30 minutes, and then dispersed with a Manton Gaulin. While stirring, 88 parts by mass of methylene chloride was added to the silica dispersion, and stirred and mixed in a dissolver for 30 minutes to prepare a silica dispersion dilution. Filtration was performed with a fine particle dispersion diluent filter (Advantec Toyo Co., Ltd.: polypropylene wound filter TCW-PPS-1N).

[0285]

[0286] (cellulose ester resin)

[0287] Cellulose triacetate A (cellulose triacetate synthesized from cotton linters, acetyl substitution degree 2.88, Mn=140000) 90 parts by mass

[0288] (additive)

[0289] X-1 5 parts by mass

[0290] X-12 4 parts by mas...

Embodiment 2

[0350] Except having made content of the plasticizer A in the cellulose ester film of a hard coat into 1 weight%, it was the same as Example 1.

Embodiment 3

[0352] Except having made content of the plasticizer A in the cellulose ester film of a hard coat into 20 weight%, it was the same as Example 1.

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Abstract

This process includes applying a hard coat layer (51) to a thin optical film (such as a cellulose ester film (41)) which is formed by a solution casting method and has a thickness of 15 to 30 [mu]m and which contains not only 1 to 20wt% of a plasticizer having a property of being more densely distributed on a side that has acted as the support side in a casting process for film formation but also silica fine particles as a matting agent, wherein the hard coat layer (51) is applied onto a side such that the silica fine particle concentration on the side is higher than the overall average silica fine particle concentration of the thin optical film.

Description

technical field [0001] The present invention relates to a method for producing a hard coat film in which a hard coat layer is applied to a thin optical film. Background technique [0002] Since the surface of a display device is easily damaged by direct hand contact or contact with an object, a hard coat film having a hard coat layer for preventing damage is generally attached to the surface of the display device. In particular, in a liquid crystal display device, by affixing the above-mentioned hard coat film on the surface of the polarizing film (polarizer) of the polarizing plate on the light exit side, it is possible to reduce the thickness of the entire device while preventing damage. [0003] An example of such a hard coat film is disclosed in patent document 1. In the examples of Patent Document 1, a hard coat layer with a film thickness of 20 μm was formed on one surface of a film base material with a film thickness of 80 μm to produce a hard coat film. [0004] Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/04B32B27/22C08J7/043C08J7/044C08J7/046C08J7/056
CPCG02B5/30C08J2301/10B32B5/16B32B23/12B32B23/16B32B23/20B32B2264/102B32B2307/42B32B2457/00B32B2457/208G02B1/16C08J7/0427C08J7/043C08J7/046C08J7/044C08J7/056G02B1/14
Inventor 北条裕子
Owner KONICA MINOLTA INC
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