KR20080004907A - Anti-glare film including complex particles and manufacturing method thereof - Google Patents

Abstract

An anti-glare film including complex particles and a manufacturing method thereof are provided to improve visibility and to reduce reflectivity of the anti-glare film, by including a nano particle group and nano particles and at least one kind of micro particles with different refractive index from the refractive index of a resin layer into the resin layer. An anti-glare film(300) includes a transparent base film(202), a resin layer(204), a number of first particles(203), a number of second particles(205) and at least one kind of micro particles(303,305). The resin layer is located on the transparent base film. The first particles are dispersed on the resin layer. The second particles forms a pseudo-nano assembly dispersed on the resin layer. The micro particles have a different refractive index from that of the resin layer.

Description

Anti-glare film including composite particles and manufacturing method thereof {Anti-glare film including complex particles and manufacturing method}

1 is a schematic cross-sectional view of a conventional anti-glare film.

Figure 2 is a schematic cross-sectional view of another conventional anti-glare film.

Figure 3 is a cross-sectional view of the anti-glare film formed a virtual particle assembly according to the nanoparticle group.

Figure 4 is a cross-sectional view of the anti-glare film according to an embodiment of the present invention.

5 is a view illustrating a process of forming a microcell and a virtual nanoparticle aggregate dispersed in a resin layer of an antiglare film according to the present invention.

Figure 6 is a flow chart of the manufacturing process of the anti-glare film according to an embodiment of the present invention.

`` Explanation of symbols for main parts of drawings ''

100, 200: antiglare film 102, 202: transparent substrate

103: fine particles 105: large particles

104, 204: resin layer 203: nanoparticles

205 virtual nanoparticle aggregate 210 surfactant

215: microcell 303: first microparticle

305: second micro particles

The present invention relates to an antiglare film comprising composite particles, and more particularly, to an antiglare film and a method for manufacturing the antiglare film, which are disposed on the front of a CRT or LCD display to diffuse light entering the outside of the display to prevent or minimize glare. Invention.

In general, a CRT display emits light to the front of the display by emitting phosphors inside the liquid crystal display, and emits light toward the front of the display by emitting light from the back with backlighting to illuminate the liquid crystal image.

When the display is used indoors, the illumination light of the fluorescent light is incident on the surface of the display and the screen is dazzling while the light is reflected, and the character recognition is difficult because the fluorescent light shines.

In order to prevent this, as shown in Fig. 1, on the transparent substrate 102, a resin coating material having large particles 105 dispersed therein is formed to form a layer having irregularities, and antiglare manufactured by the above method. By arranging the film 100 on the front of the display, a technique of alleviating the glare of the screen and realizing the sharp image quality from the display has been performed in the past.

Also, In order to obtain a clearer and clearer display, an antireflection film coated with a low refractive index and a high refractive index material in the form of a lamination may be additionally installed on the upper surface of the antiglare film. Technology is also being used.

However, when the anti-reflection film is additionally installed, the display transmittance is lowered, resulting in a loss of image quality and a problem such as an increase in manufacturing cost.

On the other hand, a technique of additionally coating a low refractive index material on the surface of the anti-glare film also remains a problem such as lowering the process yield and manufacturing cost increases.

Anti-glare is proportional to the roughness of the surface in contact with the outside.

That is, the greater the surface irregularities, the greater the scattering effect of external light, so that the anti-glare property can be improved.

In order to make the surface irregularities large, it is possible to increase the size of the particles contained in the resin or to increase the content of the particles.

However, when the size of the particles is increased or the content of the particles is increased, the anti-glare property is improved, but the haze increases, which may cause a problem of lowering the sharpness of the image emitted from the inside of the display.

In addition, as the particles in the coating material become larger and the content thereof increases, the particles in the coating liquid are easily precipitated, which may cause problems such as poor uniformity of the coating material.

Therefore, in order to solve the problems of anti-glare reduction and haze rise mentioned above, as shown in FIG. 2, two or more kinds of fine particles 103 and 105 may be mixed.

However, when two or more kinds of fine particles are mixed, haze and anti-glare can be realized to a level satisfactory to the user. However, in order to further improve the anti-reflection function, an anti-reflection layer on the surface of the anti-glare film Additionally requires.

Since it must go through a separate coating process, problems such as an increase in manufacturing cost and a decrease in process yield are still not solved.

Accordingly, in order to solve the above problems, the present applicant, as filed with the patent application 2006-28561, using the nanoparticles as an antiglare layer formed on the resin layer, the nanoparticles are clustered in a virtual microcell. By forming large virtual nanoparticle aggregates and dispersing residual nanoparticles and taking the form of using two or more particle sizes, both anti-glare and low reflectivity can be achieved without affecting process yield and cost increase. An anti-glare film is proposed to satisfy.

Figure 3 is a cross-sectional view of the anti-glare film according to an embodiment of the present invention, the anti-glare film 200 is a transparent substrate 202, the resin layer 204 is located on the transparent substrate 202, A plurality of first particles 203 as nanoparticles dispersed in the resin layer 204, and a surfactant formed in the resin layer 204 to form a micro cell (micro cell) and to the inside of the micro cell The first particle 203 includes a plurality of second particles 205 which are pseudo-assembly formed by entering and collecting.

The virtual nanoparticle assembly 205 serves as large particles functioning as surface irregularities in the antiglare film by forming antiglare irregularities on the transparent substrate 202.

In addition, the nanoparticles 203 dispersed in the resin layer 204 are different from the original refractive index values of the resin layer 204, and some of the resin layers 204 and the nanoparticles 203 are in nano units. By alternately generating the difference in refractive index into the resin layer 204, which reduces the reflectance of the anti-glare film 200 by the optical interference principle.

On the other hand, the anti-glare film 200 composed of the nanoparticle group 205 and the nanoparticles 203 dispersed in the resin layer 204 By further including at least one particle having a different refractive index from the resin layer, it is possible to implement an anti-glare film having better visibility and reduced reflectance.

The present invention has been made in view of the above point, at least one or more microparticles having a difference between the nanoparticle group and the nanoparticles and the refractive index of the resin layer functioning as surface irregularities of the resin layer It is for providing the outstanding anti-glare film which the visibility of an anti-glare film improved and the reflectance reduced by further including in the said resin layer.

Anti-glare film according to the present invention for achieving the above object is a transparent substrate, a resin layer located on the transparent substrate, a plurality of first particles as nanoparticles dispersed in the resin layer, dispersed in the resin layer It includes a plurality of second particles that are virtual nanoparticle aggregates, and at least one or more microparticles having a different refractive index than the resin layer.

In addition, in the anti-glare film according to the present invention, the first particles are characterized in that it comprises one or more of the group consisting of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, zinc oxide.

In addition, in the anti-glare film according to the present invention, the size of the first particles is characterized in that about 1nm to 50nm.

In addition, in the anti-glare film according to the present invention, the size of the second particles is characterized in that about 50nm to 20㎛.

In addition, in the anti-glare film according to the present invention, the second particles are formed by forming a micro cell by the surfactant contained in the resin layer and is formed by the plurality of first particles enter and collect into the micro cell. It is characterized by.

In addition, in the antiglare film according to the present invention, the micro particles are preferably used as styrene beads, acryl beads, acrylic-styrene beads, melamine beads, polycarbonate beads, polyethylene beads, and the like. Beads are more preferable, Si02, Al-Si0, etc. are preferably used as the inorganic particles, and Si02 is more preferable.

In addition, in the anti-glare film according to the present invention, the size of the microparticles is characterized in that less than about 1㎛ 10㎛, characterized in that the refractive index of the particles is 1.4 to 1.6 or less.

On the other hand, in the production method of the anti-glare film according to the present invention, after adding a solvent to the resin to dissolve the surfactant and the high-speed mixing and stirring to form a micro cell, the nano-particles are added to the resin coating material formed with the micro cell Preparing a nanoparticle composition by stirring at low speed; adding and stirring and mixing the microparticle composition including at least one or more types of microparticles and the nanoparticle composition to prepare a mixed particle composition; Coating the upper portion, removing the solvent by passing the transparent substrate coated with the mixed particle composition solution through a drying furnace, and curing the ultraviolet light by irradiating the transparent substrate coated with the mixed particle composition solution.

In addition, in the method for producing an antiglare film according to the present invention, the solvent is characterized in that a mixture of a fast drying solvent and a slow drying solvent.

In addition, in the manufacturing method of the anti-glare film according to the present invention, the nanoparticles to be added to the composition is a silica-based, the particle size is characterized in that the range of about 1nm to 50nm.

Hereinafter, exemplary embodiments will be described in more detail with reference to the accompanying drawings.

Figure 4 is a cross-sectional view of the anti-glare film according to an embodiment of the present invention.

Referring to FIG. 4, the antiglare film 300 according to the present invention includes a transparent substrate 202, a resin layer 204 positioned on the transparent substrate 202, and nanoparticles dispersed in the resin layer 204. A plurality of first particles 203 and a surfactant included in the resin layer 204 form a micro cell, and the plurality of first particles 203 enter and collect into the micro cell. And a plurality of second particles 205 which are pseudo-assembly formed by at least one of them, and at least one or more micro particles 303 and 305 having different refractive indices from the resin layer 204.

The virtual nanoparticle assembly 205 serves as large particles functioning as surface irregularities in the antiglare film by forming antiglare irregularities on the transparent substrate 202.

In addition, the nanoparticles 203 dispersed in the resin layer 204 are different from the original refractive index values of the resin layer 204, and some of the resin layers 204 and the nanoparticles 203 are in nano units. By alternately generating a difference in refractive index into the resin layer 204, which can reduce the reflectance of the anti-glare film 300 by the optical interference principle.

In addition, by providing the internal haze according to the additional use of the microparticles 303 and 305, the production of an anti-glare film having excellent visibility is facilitated.

The transparent substrate 202 is a cellulose derivative such as diacetyl cellulose, triacetyl cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, polysulfone, polyamide, Polypropylene, polyethylene, polycarbonate, and the like are preferable, and triacetyl cellulose, polyethylene terephthalate, and polyether sulfone are more preferable, but are not necessarily limited thereto, and any transparent substrate can be used.

The transparent substrate 202 has a transmittance of 80% or more, and preferably has a transmittance of 85% or more.

Here, the first particles as the nanoparticles are preferably used in one or two or more mixed forms of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, and zinc oxide, and are silica-based nanoparticles. It is more preferable that the particles, the size of the first particles is preferably in the range of 1nm to 50nm.

In addition, in the antiglare film according to the present invention, the size of the micro cell by the surfactant 210 is inversely proportional to the speed of the high speed mixing stirrer, and the size of the second particles is preferably in the range of 50 nm to 20 μm. .

5 is a view illustrating a process of forming a microcell and a virtual nanoparticle aggregate dispersed in a resin layer of an antiglare film according to the present invention.

The microcell 215 is manufactured in a form including a cavity inside the resin by dissolving the resin in a solvent, adding a surfactant and stirring at high speed.

The size of the micro cell 215 is inversely proportional to the speed of the high speed mixing stirrer, and the amount of micro cell 215 depends on the concentration of the surfactant.

At this time, the content of the surfactant is preferably about 0.1 parts by weight to 2 parts by weight, more preferably about 0.3 parts by weight to 1.7 parts by weight per 100 parts by weight of the resin coating material.

If the surfactant is less than 0.1 parts by weight, it is difficult to form microcells that exhibit sufficient anti-glare properties. If the surfactant is more than 2 parts by weight, it is difficult to cause process problems due to the increase in viscosity of the resin coating and the bubbles generated in the mixing process. do.

When the nanoparticles 203 are introduced into the resin coating material on which the microcells 215 are formed, and then stirred at a low speed, the nanoparticles 203 having hydrophilicity enter the empty space inside the microcells and are collected. pseudo-assembly, 205).

Here, the solvent of the resin coating material is used by mixing one or two or more kinds of fast-drying and slow-drying solvent.

The solvent may be freely selected from methyl isobutyl ketone, methyl ethyl ketone, toluene, ethyl acetate, enbutyl acetate, cyclohexanone, methanol, ethanol, n-butanol, isopropanol, but evaporated through data such as boiling point of the solvent. It is preferable to select at least one type in consideration of performance.

4 and 5, when the nanoparticles are coated with a resin coating material on the transparent substrate 202 and a drying process is performed, the virtual nanoparticle aggregates 205 where the nanoparticles are clustered and aggregated are on the anti-glare film 300. By forming anti-glare irregularities in the role of the large particles used in the anti-glare film.

In addition, since the virtual nanoparticle aggregate 205 has an irregular lump form having surface irregularities, it is possible to implement a greater roughness than smooth spherical particles.

Therefore, the anti-glare film according to the embodiment of the present invention uses two or more kinds of particle sizes, such as the first particles 203 and the second particles 205 and, due to the surface irregularities of the second particles 205 which are virtual particles. Anti-glare by external light scattering is maximized.

Here, as the first particles 203 as nanoparticles are used, the reflectance can be lowered as the material having a lower refractive index is used.

In addition, the first microparticles 303 and the second microparticles 305 affect the internal haze implementation.

Here, the size of the microparticles is characterized in that about 1㎛ 10㎛ or less, the refractive index of the particles is preferably 1.4 to 1.6 or less.

In addition, as the organic particles, styrene beads, acryl beads, acryl-styrene beads, melamine beads, polycarbonate beads, polyethylene beads, etc. are preferably used as the organic particles, and styrene beads and acryl beads are more preferable. Si02, Al-Si0, or the like is preferably used, and Si02 is more preferable.

In addition, the second particles 205, which are made as a group of nanoparticles using nanoparticles, realize external haze, whereas the microparticles 303 and 305 are different from the nanoparticles dispersed in the resin layer 202. The optical properties such as refractive index are different, which affects the reflectance and visibility of the antiglare film 300.

That is, the visibility of the antiglare film in the case of using only the nanoparticles by the composite particles including the nanoparticles and the microparticles is excellent, and the nanoparticles and the microparticles in the case of using only the microparticles By using the composite particles together with the excellent reflectance characteristics.

Compared to the case where only the nanoparticles or microparticles are dispersed in the resin layer 202, the correlation between visibility and reflectance in the case where nanoparticles and microparticles are dispersed together is shown in the following table.

<Relationship between Visibility and Reflectance of Nano, Nano + Micro, and Micro>

particle Micro Micro + Nano Nano Visibility Micro + Nano > Nano reflectivity Micro < Micro + Nano

In other words, it can be seen that the use of micro + nanoparticles is better than the use of only nanoparticles in visibility, and the use of micro + nanoparticles is better than that of using only microparticles in reflectance.

Next, the manufacturing method of the anti-glare film which concerns on this invention is demonstrated.

6 shows a flowchart of a manufacturing method according to an embodiment of the present invention.

As shown in Figure 6, in the manufacturing process of the anti-glare film according to an embodiment of the present invention, first by adding a solvent to the resin to dissolve, the surfactant is added to the microcell by the surfactant 210 by high-speed mixing and stirring Proceeding to form a step (215) (S10).

Next, the nanoparticles are added to the resin coating material in which the microcells are formed, and then the mixture is stirred at low speed to prepare a nanoparticle composition solution (S20).

In this step, the nanoparticles 203 entering into the empty space of the micro cell 215 gather to form the virtual nanoparticle aggregate 205, and the remaining residual nanoparticles 203 are irregularly dispersed in the solution.

At this time, the preparation of the nanoparticle composition according to one embodiment may be as follows.

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, a high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of photopolymerization initiator (IGC184, Ciba-Geigy) were added to the mixture, and the mixture was stirred at 800 rpm for 30 minutes to prepare a nanoparticle composition. Prepared. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

Next, a step of preparing a mixed particle composition solution by preparing a micro particle composition solution containing at least one type of micro particles, adding and stirring and mixing the micro particle composition solution and the nanoparticle composition solution (S30).

At this time, the preparation of the microparticle composition according to one embodiment may be as follows.

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) and 5 parts by weight of photopolymerization initiator (IGC184, Ciba-Geigy) were added to 130 parts by weight of cyclohexanone (Duksan Chemical), followed by stirring and dissolving for 10 minutes. 15 parts by weight of acryl beads (MX300, Soken), styrene beads 5 parts by weight of (SX350H, Soken) was further added and stirred at 500 rpm for 30 minutes to prepare a microparticle composition. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

Next, the mixed particle composition is coated with a micro-gravure roll on the upper portion of the transparent substrate 202 (S40).

The plurality of second particles 205, which are the virtual nanoparticle aggregates, are preferably positioned on the surface of the resin layer 204.

Thereafter, the step of removing the solvent by passing the transparent base material 202 coated with the resin coating material through a drying furnace (S50).

Finally, the anti-glare film 300 including the anti-glare resin layer 204 is manufactured by irradiating UV-curing the transparent base material coated with the resin coating material from which the solvent is removed (S60).

Hereinafter, the present invention will be described in more detail with reference to preferred examples and comparative examples. The following examples are intended to illustrate the invention but are not limited thereto.

<Example 1>

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, the high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

To this solution, 10 parts by weight of the prepared microparticle composition was added and stirred to prepare a mixed particle composition. The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

<Example 2>

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, the high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

To this solution, 20 parts by weight of the prepared microparticle composition was added and stirred to prepare a mixed particle composition. The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

<Example 3>

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, the high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

30 parts by weight of the microparticle composition solution prepared above was added to this solution and stirred to prepare a mixed particle composition solution. The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

<Example 4>

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, a high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

40 parts by weight of the microparticle composition solution prepared above was added to the solution and stirred to prepare a mixed particle composition solution. The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

Example 5

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, the high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

To this solution, 50 parts by weight of the prepared microparticle composition solution was added and stirred to prepare a mixed particle composition solution. The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 of ultraviolet light (Igraphix Co., Ltd.) was performed to form a coating thickness of 8 μm to prepare an anti-glare film.

Comparative Example 1

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) resin was mixed with 65 parts by weight of cyclohexanone (Dysan Chemical) and 65 parts by weight of isopropyl alcohol (IPA, large purified gold) and then dissolved. After adding 3 parts by weight of surfactant (disperBYK2000, BYK chemie) to the solution, the high-speed mixer Homogenizer (IKA) is stirred at 10,000 rpm for 10 minutes. After stirring, 100 parts by weight of silica sol (20 nm, 20 wt%, thiochem) and 5 parts by weight of a photopolymerization initiator (IGC184, Ciba-Geigy) were further added, followed by low speed stirring at 800 rpm for 30 minutes to prepare a nanoparticle composition solution. It was. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

Comparative Example 2

20 parts by weight of urethane acrylate oligomer (EB1290, SK Cytec), 15 parts by weight of polyfunctional acrylate monomer (PETIA, SK Cytec), 35 parts by weight of epoxy acrylate oligomer (CN133LC, Satomer), 30 parts by weight of urethane acrylic The late oligomer (UP016, SK Cytec) and 5 parts by weight of photopolymerization initiator (IGC184, Ciba-Geigy) were added to 130 parts by weight of cyclohexanone (Duksan Chemical), followed by stirring and dissolving for 10 minutes. 15 parts by weight of acryl beads (MX300, Soken) and 5 parts by weight of styrene beads (SX350H, Soken) were further added to the solution, followed by stirring at 500 rpm for 30 minutes to prepare a microparticle composition. The above-mentioned parts by weight notation indicates each used composition in parts by weight based on 100 parts by weight of the monomer and oligomer resin used.

The prepared mixed particle composition was coated on one surface of the TAC film (40㎛, Fuji) using Micro-Gravure (Mesh 9), and then dried sequentially at a temperature condition of 80 ° C-80 ° C-80 ° C-80 ° C for 60 seconds. After the coating, photopolymerization of the coating material coated with 250 mJ / cm 2 ultraviolet (Igrafix Co., Ltd.) was carried out to form a coating thickness of 8 μm to prepare an anti-glare film.

Evaluation of the anti-glare film prepared from the above Examples and Comparative Examples is carried out by the following method.

(1) Haze, internal and external haze & total transmittance

The value is measured using a spectrophotometer (NDH2000, Nippon Denshoku).

       Result notation: Haze (%), internal and external haze (%), total light transmittance (%)

(2) reflectance

 Attach black film with excellent wetting and adhesion to prevent bubbles from occurring, and measure 5˚ reflectance using a reflectance measuring instrument.

Result notation:% reflectance

(3) visibility

The antiglare film prepared on the black acrylic plate was pasted using an optical adhesive and visually grasped the black degree.

Result notation: Excellent ◎, Good ○, Normal △, Poor X

<Nano + micro particle composition liquid combination and result>

division Evaluation item Haze (%) Internal haze (%) Transmittance (%) Reflectance (%) Visibility Example 1 45 35 93 ◎ (2.0) ○ Example 2 43 37 91 ○ (3.1) ◎ Example 3 44 42 92 ○ (3.7) ◎ Example 4 45 25 93 ◎ (1.5) ○ Example 5 44 43 92 ○ (3.9) ◎ Comparative Example 1 42 3 92 ◎ (0.7) X Comparative Example 2 43 42 93 X (4.6) ◎

As shown in the above table, the evaluation results of the present invention could be derived through the preferred examples and the comparative examples.

In the case of dispersing a composite of microparticles in an antiglare film having nanoparticles and a pseudo-assembly formed from the particles as a coating layer, the nanosites of Examples 1 to 5 are excellent in visibility and reflection performance. Visibility under similar haze value conditions was compared with the antiglare film prepared using and microparticles and the comparative example in which only nanoparticles or microparticles were dispersed. It can be seen that the high reflectance and low reflectivity can enable not only the function of the antiglare film but also the secondary role of the antireflection film.

Although the present invention has been described in detail only with respect to the specific embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims. .

According to the present invention, as the anti-glare film uses two or more kinds of size particles, the virtual particles themselves have irregularities to maximize the anti-glare property and lower the reflectance by the small particles, and at the same time the refractive characteristics of the different particles. By providing this, the visibility of the antiglare film is improved and an excellent antiglare film with reduced reflectance is provided.

In addition, according to the present invention, there is an effect of providing an anti-glare film having a low reflectance while securing a low manufacturing cost without lowering the process yield in the production of the anti-glare film.

Claims (10)

Transparent substrates; A resin layer located on the transparent substrate; A plurality of first particles as nanoparticles dispersed in the resin layer, A plurality of second particles that are virtual nanoparticle aggregates dispersed in the resin layer; And An antiglare film comprising at least one microparticle having a different refractive index from the resin layer. The method of claim 1, The first particle is an anti-glare film, characterized in that it comprises one or more of the group consisting of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, zinc oxide. The method of claim 1, Antiglare film, characterized in that the size of the first particle is about 1nm to 50nm. The method of claim 1, The size of the second particles, anti-glare film, characterized in that about 50nm to 20㎛. The method of claim 1, The second particle is formed by forming a micro cell by the surfactant included in the resin layer and formed by collecting the plurality of first particles entering the micro cell. The method of claim 1, The microparticles are anti-glare film, characterized in that at least one selected from styrene beads, acryl beads, acrylic-styrene beads, melamine beads, polycarbonate beads, polyethylene beads, Si02, Al-Si02. The method of claim 1, The size of the microparticles is characterized in that less than about 1㎛ 10㎛, anti-glare film, characterized in that the refractive index is 1.4 to 1.6 or less. Adding a solvent to the resin to dissolve and then adding a surfactant and stirring the mixture at high speed to form a microcell; Preparing nanoparticle compositions by adding nanoparticles to the resin coating material in which the microcells are formed and stirring at low speed; Preparing a mixed particle composition solution by adding, stirring and mixing the micro particle composition solution including the at least one kind of micro particles and the nanoparticle composition solution; Coating the mixed particle composition on an upper portion of the transparent substrate; Removing the solvent by passing the transparent substrate coated with the mixed particle composition solution through a drying furnace; And Method for producing an anti-glare film comprising the step of curing by irradiating UV light to the transparent substrate coated with the mixed particle composition. The method of claim 8, The solvent is a method for producing an anti-glare film, characterized in that to use a quick-drying solvent and a slow-drying solvent. The method of claim 8, Nanoparticles are added to the composition is a silica-based, the size of the particle production method of the anti-glare film, characterized in that in the range of about 1nm to 50nm.

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