JPH11109112A - Manufacture of glare preventive treated layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glare preventive treatment layer which is excellent in display quality and pollution adhesion prevention property, and useful for a glare preventive treated layer for display and other applications requesting the light scattering by mixing and stirring the base resin and the filler with the ultrasonic wave in manufacturing the glare preventive treated layer. SOLUTION: The base resin and the filter are mixed and stirred with the ultrasonic wave to obtain the mixture thereof. After the mixing and stirring, the mixture is coated and then, cured. The filler includes the polysiloxane compound and the fluorine compound. The blend of the filter is preferably 0.001-500 pts.wt. (more preferably 0.1-100 pts.wt.) to 100 pts.wt. base resin. In the ultrasonic stirring, the oscillation frequency of >=10 kHz (more preferably, 10-500 kHz) is preferably used, and when the frequency is below 10 kHz, no sufficient stirring effect is obtained. The high frequency output is preferably >=50 W (more preferably, 5-1000 W), and when it is below 50 W, no stirring effect is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an anti-glare treatment layer, and more particularly, to a method for producing an anti-glare treatment layer having good display quality and excellent stain prevention.

[0002]

2. Description of the Related Art In CRT displays and flat displays (liquid crystal display devices, plasma displays, EL displays, etc.), light is incident on the screen from the outside,
This light is reflected (referred to as glare or glare) and there is a drawback that the displayed image is difficult to see. As a countermeasure against this, an anti-glare treatment is performed on each display surface.
The image display surface of the glass of a cathode ray tube is roughened by chemical etching using chemicals or the like, and in the anti-glare of a flat display such as a liquid crystal display device, it is mechanically (sandblasted) or chemically etched. Separately mounting a glass plate or a plastic plate, separately mounting a glass plate or a plastic plate to which a multi-layer vapor-deposited film of titanium oxide, silicon oxide, etc. has been added, and attaching an anti-glare film to the display Matching is being done.

[0003]

In particular, in recent years, as the size of the display has been increased, the definition thereof has been increased, and the use thereof has been expanded, an anti-glare treatment layer having good display quality and excellent antifouling property has been desired. It has become

[0004]

Accordingly, the present inventor has conducted intensive studies in view of the present situation. As a result, the present inventors have found that the production method is achieved by mixing and stirring the base resin and the filler with ultrasonic waves and then applying the resulting mixture. The inventor has found that the anti-glare treatment layer can achieve the above object, and has completed the present invention.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described specifically. Anti-glare treatment layer produced by the method of the present invention,
Consisting of a base resin and a filler, a mixture comprising the base resin and the filler is applied and cured to form an anti-glare treatment layer.In the present invention, in obtaining a mixture of the base resin and the filler, The greatest feature is that the two are mixed and stirred by ultrasonic waves, and the mixture is applied after the mixing and stirring, and is further cured. The method of the present invention will be described more specifically.

The base resin used in the present invention is not particularly limited, but the cured film has a transmittance of 88% or more (further 90 to 100%) and a glossiness (incident angle of 60 °) of 60%.
(%) Or more (more preferably 70 to 100 (%)). When the transmittance is less than 88%, the entire display element becomes dark, and the gloss (incident angle 60 °) is less than 60 (%). In this case, it is not preferable because the stain prevention property is reduced and slime is generated. Specific examples of such base resins include cellulose acetate resins, acrylic urethane resins, polyester acrylate resins, epoxy acrylate resins, cellophane resins, polyolefin resins, polycarbonate resins, polyvinyl alcohol resins, and polyether ether ketones. -Based resins, melamine-based resins, polysulfone-based resins, fluorine-based resins, and the like. Curable, ultraviolet-curable, electron beam-curable resins, or a combination of these treatments are preferred, and from the viewpoint of industrial simplicity, ultraviolet-curable resins are practical.

[0007] The ultraviolet-curable resin used here is not particularly limited as long as it can be photocured by irradiating ultraviolet rays, and these resins are usually used together with a known photosensitizer. Examples of such a resin include acrylic urethane-based resins, polyester acrylate-based resins, epoxy acrylate-based resins, and the like.The acrylic urethane-based resins generally include a polyester polyol reacted with an isocyanate monomer or a prepolymer, Further 2-
It is obtained by reacting an acrylate having a hydroxyl group such as hydroxylethyl (meth) acrylate or 2-hydroxylpropyl (meth) acrylate or a methacrylate monomer. As the polyester acrylate resin, generally, a polyester polyol,
It is obtained by reacting an acrylate or methacrylate monomer having a hydroxyl group such as 2-hydroxylethyl (meth) acrylate or 2-hydroxylpropyl (meth) acrylate. The epoxy acrylate-based resin is obtained by using epoxy acrylate as an oligomer, adding a reactive diluent and a photoreaction initiator to the oligomer, and causing the reaction to occur. As the reactive diluent, ethoxyethoxyethyl acrylate, tetrahydrofuryl acrylate, butyl juquizol acetate, etc. are used.As the photoreaction initiator, benzoin ether derivatives, acetophenone derivatives, oxime ketone derivatives, benzophenone derivatives, thioxane Ketone derivatives, anthraquinone derivatives and the like are used.

The filler (filler) to be mixed with the base resin as described above is not particularly limited, but has a transmittance of 40% or more (when the material of the filler is a 10 μm thick layered material, Further, the refractive index is preferably 50% to 100%, and the refractive index is 1.0 to 1.7 (furthermore, 1.3 to 1.3).
1.6) is preferred. Specific examples of such a filler include a polysiloxane compound and a fluorine compound. Specific examples of the polysiloxane compound include "Tospearl" manufactured by Toshiba Silicone, "KMP Series" manufactured by Shin-Etsu Silicone, and " X-52 Series ", Toray Dow Corning's" Trefill ", Fuji Silysia Chemical's" Sycilia ", Tokuyama's" Toksil "
Preferably, "Tospearl" manufactured by Toshiba Silicone Co., Ltd. is used, and as the fluorine compound, "Fluon" and "Lubricant" manufactured by Asahi ICC Fluoropolymers Co., Ltd., and Mitsui DuPont Fluorochemical Co., Ltd. "Zonil" manufactured by Daikin Industries, Ltd., and "Rublon" manufactured by Daikin Industries, Ltd., and "Rublon" manufactured by Daikin Industries, Ltd. are preferably used.

The amount of the filler is preferably 0.001 to 500 parts by weight (more preferably 0.1 to 100 parts by weight) with respect to 100 parts by weight of the base resin. If the amount is less than the weight part, the anti-glare effect cannot be obtained,
Conversely, when the amount exceeds 500 parts by weight, the display quality is deteriorated, which is not preferable. The most characteristic feature of the present invention is that, when the base resin and the filler are mixed as described above, ultrasonic stirring is performed, and such stirring will be described in detail.

In performing the ultrasonic stirring, there is no particular limitation, but 10 kHz or more (further 10 to 500 kHz)
It is preferable to use the oscillation frequency of z), and if the oscillation frequency is less than 10 kHz, a sufficient stirring effect cannot be obtained, which is not preferable. The high-frequency output at this time is preferably 50 W or more (more preferably 50 to 1000 W). If the output is less than 50 W, the stirring effect cannot be obtained, which is not preferable. As such a stirrer, specifically, "UT-" manufactured by Sharp Corporation
104 "and" US-4 "manufactured by Iuchi Corporation.

As an example of stirring using such an ultrasonic stirrer, the above-mentioned compound (resin, filler, etc.) is sealed in a container such as a mayonnaise bottle and the temperature of the solution in the ultrasonic stirrer is reduced. The stirring is performed while maintaining the temperature at about 20 to 30 ° C. After ultrasonic agitation, it is applied, but in application, casting casting, die casting, spray coating, gravure coating, microgravure coating, roll coating, bar coating, die coating, spin coating,
An anti-glare treatment layer can be obtained by forming or applying a film by a known method such as dip coating or electrostatic heliophone coating and curing. In the case of using such an ultraviolet-curable resin as the base resin for the curing, the resin may be photocured by irradiating ultraviolet rays, and a method of curing the used base resin may be employed.

Thus, an antiglare treatment layer is obtained. The thickness of such a layer is preferably 0.01 to 1000 μm (more preferably 0.1 to 100 μm), and the thickness is preferably 0.0 to 1000 μm.
When the thickness is less than 1 μm, the material tends to be easily broken or peeled off due to hard and brittle mechanical properties accompanying the surface hardness.

The antiglare treatment layer of the present invention thus obtained comprises:
It is provided on the surface of various display devices (displays) such as a liquid crystal display device, a plasma display device, a CRT, and an EL (electroluminescence), and is provided for practical use. About how to attach,
There are the following four methods.

(A) a method in which the anti-glare treatment layer is directly laminated on a display element of each display with an acrylic pressure-sensitive adhesive in the form of a formed film, and (B) the anti-glare treatment layer is A method in which the film is bonded to another film (a film of a cellulose acetate resin or a polyester resin) in the form of a formed film and then bonded on a display element of each display; (C) the anti-glare treatment layer Is applied to another film (same as above) and then bonded on the display element of each display, and (D) the antiglare treatment layer is applied directly on the display element of each display. Any of these methods may be used, and the effect is not changed, but the method (C) is practical from the viewpoint of industrial simplicity.

Thus, the anti-glare treatment layer obtained by the method of the present invention is an anti-glare treatment layer having good display quality and excellent anti-staining properties, such as an anti-glare treatment layer for displays, other windows and It is also useful for applications that require light scattering on walls and the like.

[0016]

Next, the present invention will be described in more detail with reference to examples. Example 1 50 parts by weight of a polysiloxane compound having an average particle diameter of 12 μm (“Tospearl 3120” manufactured by Toshiba Silicone Co., Ltd.) and an average length of 7 were added to 100 parts by weight of an ultraviolet curable acrylic resin.
μm, 50 parts by weight of an amorphous fluorine compound having an average width of 7 μm (“Rublon L-5” manufactured by Daikin) were mixed, and an ultrasonic stirrer (“US-4” manufactured by Iuchi Co., Ltd., oscillation frequency 38) was mixed.
After mixing and stirring at 80 W for 120 minutes using a
Heat at 0 ° C. for 2 minutes, and then irradiate with ultraviolet light to obtain a thickness of 1
An antiglare layer having a thickness of 0 μm was obtained. The following evaluation was performed using the obtained anti-glare treatment layer.

A cellulose triacetate film having such an anti-glare treatment layer is coated on a polarizing plate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., “PH
N18442S "), after peeling off the masking film on the side of the masking film (that is, the non-adhesive surface),
A polarizing plate was obtained by bonding with an acrylic pressure-sensitive adhesive. On the other hand, a TFT liquid crystal display device (manufactured by Fujitsu Limited, "UL-210
07 ”, 21.3 inch model, 1280 × 1024 dots), and the resulting polarizing plate having the anti-glare layer was bonded to obtain a liquid crystal display device.

Using the obtained liquid crystal display device, the liquid crystal display device and one 100 W fluorescent lamp were placed in a dark room at a distance of 4 m, and the following evaluations were visually evaluated by 10 evaluators (panels). Was. In addition, the evaluation criteria were evaluated as good when 8 or more panelists out of 10 panelists evaluated it as good, and as poor when not. Reflection: The state of reflection of the fluorescent light on the screen surface of the liquid crystal display element was observed, and the visibility was evaluated. Glare: The state of the bright defect of astigmatic local scattered light due to the filler of the anti-glare treatment layer on the screen surface of the liquid crystal display element (that is, the state of luminance unevenness between minute pixels and between pixels) was observed, and the visibility was evaluated. . Shiromoya: Observing the state of dark defects of astigmatic local scattered light due to the anti-glare treatment layer filler on the screen surface of the liquid crystal display element (that is, the state of whitening unevenness in minute areas and between pixels)
The visibility was evaluated. Eye fatigue: Using a liquid crystal display device, after performing a word processing operation for 12 hours continuously, the eyestrain of the evaluator was evaluated. Stain removal property: The anti-glare treatment layer on the screen surface of the liquid crystal display element is stained with a finger fingerprint, and then left for 3 days. The stain is washed once with absorbent cotton soaked with a cleaner solution of 20% isopropyl alcohol and 80% water. After wiping off, the state of contamination on the surface of the display element was observed. Visibility after removing dirt: After the anti-glare treatment layer on the screen surface of the liquid crystal display element is stained with fingerprints of a finger, and left for 3 days, the dirt is removed from isopropyl alcohol 20% acetone 20% water 60.
After wiping and removing once with absorbent cotton soaked with a% cleaner solution, the above-mentioned reflection, glare and shiromoya were comprehensively evaluated. Eye fatigue after removing stains: After the anti-glare treatment layer on the screen surface of the liquid crystal display element is stained with finger prints and allowed to stand for 3 days, the stains are washed with isopropyl alcohol 20% acetone 20% water 6
After wiping off once with absorbent cotton soaked with 0% cleaner solution, a word processing operation was performed continuously for 12 hours, and then the eyestrain of the evaluator was evaluated.

Example 2 In Example 1, the condition of the ultrasonic stirring was changed to a high frequency power of 8
An anti-glare treatment layer was obtained in the same manner except that the power was changed from 0 W to 200 W, and the evaluation was similarly performed.

Example 3 In Example 1, the condition of the ultrasonic stirring was changed to an oscillation frequency of 3
An anti-glare treatment layer was obtained in the same manner except that the frequency was changed from 8 kHz to 40 kHz, and the same evaluation was performed.

Example 4 An antiglare treatment layer was obtained in the same manner as in Example 1 except that the filler was changed to “Zonyl TLP-10F-1” (average particle diameter: 3 μm) manufactured by Du Pont-Mitsui Fluorochemicals. And evaluated similarly.

Example 5 A glaze-treated layer was obtained in the same manner as in Example 1, except that the blending amount of the filler was changed to 25 parts by weight.

Comparative Example 1 An antiglare treatment layer was obtained in the same manner as in Example 1, except that mixing and stirring of the base resin and the filler were performed using a screw-type stirrer instead of the ultrasonic stirrer. And evaluated similarly. Table 1 shows the evaluation results of the examples and the comparative examples.

[0024]

[Table 1]Evaluation item  Example 1 ○ ○ ○ ○ ○ ○ ○ 〃 2 ○ ○ ○ ○ ○ ○ ○ 〃 3 ○ ○ ○ ○ ○ ○ ○ ○ ４ 4 ○ ○ ○ ○ ○ ○ ○〃 5 ○ ○ ○ ○ ○ ○ ○ Comparative Example 1 × × × × × × ×

[0025]

According to the present invention, since the base resin and the filler are mixed and agitated by ultrasonic waves in the method of manufacturing the anti-glare treatment layer, (1280 × 1024 dots) in the display surface having a very large number of pixels. A) An anti-glare treatment layer having good display quality and excellent anti-staining properties can be obtained, and an anti-glare treatment layer for displays such as word processors, personal computers, televisions, car navigation systems, and other windows and walls. It is also useful for applications requiring light scattering.

Claims (5)

[Claims] 1. A method for producing an anti-glare treatment layer, comprising mixing and stirring a base resin and a filler by ultrasonic waves, and then applying the mixture. 2. The method of claim 1, wherein the high frequency power of the ultrasonic wave is 50 W or more. 3. The method for producing an anti-glare treatment layer according to claim 1, wherein the oscillation frequency of the ultrasonic wave is 10 kHz or more. 4. The method for producing an antiglare layer according to claim 1, wherein 0.001 to 500 parts by weight of a filler is mixed with respect to 100 parts by weight of the base resin. 5. The method according to claim 1, wherein the filler is a polysiloxane compound and / or
Or a fluorine compound.
4. The method for producing an anti-glare treatment layer according to any one of 4.