JP6739949B2 - Anti-glare film and display device - Google Patents

Description

The present invention relates to an antiglare film including an antiglare layer containing particles. The present invention also relates to a display device using the antiglare film.

Display devices such as liquid crystal displays, plasma displays and organic EL displays are used in various fields such as televisions and computers. When the above-mentioned display device is used outdoors or near a lighting fixture, sunlight or external light is reflected on the display unit, and visibility is deteriorated. Therefore, in order to prevent the reflection of external light, an antiglare film is used in the display device. The antiglare film is disclosed in, for example, Patent Document 1 below.

Patent Document 1 discloses an antireflection film in which a low refractive index layer is provided on a transparent substrate by applying a low refractive index coating agent. The low refractive index coating agent contains a copolymer of the composition A and the composition B, and a hollow silica sol having an average particle diameter of 0.5 to 200 nm. The composition A contains an organosilicon compound represented by the general formula (1) or a polymer of the organosilicon compound. The composition B contains a perfluoropolyether group-containing silicon compound represented by the general formula (2) or a polymer of the perfluoropolyether group-containing silicon compound.

JP, 2002-265866, A

When the antiglare film described in Patent Document 1 is used for a touch panel, scratches may occur on the antiglare film when the touch panel is operated with a hand or a touch pen. Further, in the conventional antiglare film described in Patent Document 1, light scattering is not uniform, and uneven color may occur.

It is an object of the present invention to provide an antiglare film which can improve scratch resistance and can reduce color unevenness by making light scattering uniform. Another object of the present invention is to provide a display device using the antiglare film.

According to a broad aspect of the present invention, an antiglare layer main body and an antiglare layer including a plurality of particles are provided, and the 10% compression elastic modulus of the particles is 4500 N/mm ² or more, and the compression recovery of the particles is performed. The antiglare film has a ratio of 50% or more and an average particle size of the particles of 1 μm or more and 15 μm or less.

In a specific aspect of the antiglare film according to the present invention, the particles have a hydrophilic group on the surface.

In a particular aspect of the antiglare film according to the present invention, in the particles contained in the antiglare layer, there is no particle having an average particle diameter of 2 times or more the average particle diameter of the particles. Or, in 100% of the total number of the particles, 0.1% or less of the particles having an average particle diameter of 2 times or more of the average particle diameter of the particles are present.

In a specific aspect of the antiglare film according to the present invention, the refractive index of the particles is 1.5 or more and less than 1.7.

In a particular aspect of the antiglare film according to the present invention, the particles have a portion protruding from the surface of the antiglare layer main body, or not, the particles are of the antiglare layer main body In the case of having a portion protruding from the surface, particles having a portion protruding from the surface of the antiglare layer body in 100% by volume of the total volume of the particle having a portion protruding from the surface of the antiglare layer body. The volume of the portion protruding from the surface of the antiglare layer body is 50% by volume or less.

In a specific aspect of the antiglare film according to the present invention, the particles are resin particles or organic-inorganic hybrid particles.

In a specific aspect of the antiglare film according to the present invention, the particles are resin particles.

In a specific aspect of the antiglare film according to the present invention, the haze of the antiglare layer is 2% or less.

In a specific aspect of the antiglare film according to the present invention, the antiglare film includes a support film, and the antiglare layer is disposed on the surface of the support film.

In a specific aspect of the antiglare film according to the present invention, the antiglare film is used by being arranged on the surface of the display unit of the display device.

According to a broad aspect of the present invention, there is provided a display device including a display unit and the antiglare film described above, and the antiglare film being disposed on the surface of the display unit.

The antiglare film according to the present invention includes an antiglare layer main body and an antiglare layer including a plurality of particles, and the 10% compression elastic modulus of the particles is 4500 N/mm ² or more, and the particles are compressed. Since the recovery rate is 50% or more and the average particle size of the particles is 1 μm or more and 15 μm or less, scratch resistance can be enhanced, and color unevenness can be reduced by making light scattering uniform. can do.

FIG. 1 is a schematic cross-sectional view showing an antiglare film according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing an antiglare film according to the second embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

First, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic cross-sectional view showing an antiglare film according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing an antiglare film according to the second embodiment of the present invention. In FIGS. 1 and 2, the size, thickness, shape, addition amount, etc. of the antiglare layer and particles are appropriately changed from the actual size and shape for convenience of illustration.

The antiglare film 1 shown in FIG. 1 includes an antiglare layer 2 containing a plurality of particles 11. The antiglare film 1 is a single layer and is composed of only the antiglare layer 2. The antiglare film 1 is the antiglare layer 2. The antiglare film 1 has antiglare properties. The antiglare film 1 is preferably a film having light transmittance.

The antiglare layer 2 has a first surface 2a and a second surface 2b. The first surface 2a and the second surface 2b face each other.

The antiglare layer 2 includes particles 11 and an antiglare layer body 12. The antiglare layer body 12 is a portion of the antiglare layer 2 excluding the particles 11. The antiglare layer body 12 is preferably made of a material having high light transmittance.

The entire particles 11 are arranged inside the antiglare layer body 12, and the particles 11 do not protrude from the surface of the antiglare layer body 12. The antiglare layer 2 has a protrusion on one surface and a protrusion on the first surface 2a. The antiglare layer 2 does not have a protrusion on the other surface (second surface). The antiglare layer may have a protrusion on the other surface (second surface).

The particles may have a portion that does not protrude from the surface of the antiglare layer body and a portion that protrudes from the surface of the antiglare layer body. The particles may have a portion protruding from one surface of the main body of the antiglare layer. The particles may be projected only from the first surface of the antiglare layer body. The particles may not protrude from the second surface of the antiglare layer body.

The antiglare film 1A shown in FIG. 2 includes an antiglare layer 2 and a support film 21. The antiglare film 1A is a multilayer and has a structure of two or more layers. The antiglare layer 2 is arranged on the surface of the support film 21. The antiglare layer 2 is arranged on the surface of the support film 21 from the second surface 2b side. The antiglare layer 2 in the antiglare film 1A is the antiglare layer 2 shown in FIG.

The antiglare layer 2 is disposed on the surface of the support film 21 from the second surface 2b (the surface that does not project) side. In this case, the support film 21 may be incorporated in the display device. The antiglare layer 2 may be arranged on the surface of the support film 21 from the first surface 2a (projecting surface) side. In this case, the support film 21 may be incorporated in the display device, and the support film 21 may be peeled off when the antiglare film 1A is used.

The support film 21 may have a single-layer structure having only a film layer, or may have a multi-layer structure having two or more layers having a protective layer and an adhesive layer in addition to the film layer.

The particles preferably do not have a portion protruding from the surface of the antiglare layer body. The antiglare layer preferably has a protrusion on one surface. The particles are preferably arranged inside the protrusion. The particles preferably have a protrusion on at least one of the first surface and the second surface of the antiglare layer, and only one of the first surface and the second surface of the antiglare layer is provided. It is preferable to have a protrusion on the surface.

The protrusions impart high antiglare properties to the antiglare film. When the antiglare film is used for a touch panel or the like, the surface of the antiglare layer having the protrusion is the surface opposite to the display unit side when the antiglare film is arranged on the display unit. It is preferable that the surface is a surface on which the user visually recognizes and operates. The surface of the antiglare layer having no protruding portion is preferably the surface on the display unit side when the antiglare film is arranged on the display unit. The surface of the antiglare layer having no protruding portion is preferably a mounting surface to be mounted on a touch panel or the like when the antiglare film is used for the touch panel or the like.

The particles have or do not have a portion protruding from the surface of the main body of the antiglare layer. From the viewpoint of further suppressing the detachment of particles and further improving the antiglare property of the antiglare film, when the particles have a portion protruding from the surface of the antiglare layer main body, the antiglare The volume of the portion of the particles having a portion protruding from the surface of the antiglare layer main body in 100% by volume of the total volume of the particles having a portion protruding from the surface of the layer main body, the portion protruding from the surface of the antiglare layer main body. Is preferably 50% by volume or less, more preferably 40% by volume or less. Further, from the viewpoint of further improving the antiglare property of the antiglare film and further reducing color unevenness, the particles are preferably uniformly dispersed in the antiglare layer, and the particles are aggregated with each other. Preferably not. The antiglare layer preferably does not contain aggregated particles, and it is preferable that the particles are not in contact with each other in the antiglare layer.

From the viewpoint of further improving the visibility of the antiglare film, the haze of the antiglare film is preferably 1.5% or less, more preferably 1% or less. The lower limit of haze of the antiglare film is not particularly limited. The haze of the antiglare film may be 0% or more.

From the viewpoint of further improving the visibility of the antiglare film, the haze of the antiglare layer is preferably 2% or less, more preferably 1.5% or less, still more preferably 1% or less. The lower limit of haze of the antiglare layer is not particularly limited. The haze of the antiglare layer film may be 0% or more.

The haze of the antiglare film and the antiglare layer can be measured by, for example, a haze meter (“TC-H3PDK” manufactured by Tokyo Denshoku Co., Ltd.).

Hereinafter, other details of the present invention will be described.

[Anti-glare layer]
The antiglare film according to the present invention includes an antiglare layer containing particles.

The main body of the antiglare layer, which is a portion excluding the particles in the antiglare layer, preferably has high light transmittance and is preferably formed of a resin.

The material of the antiglare layer preferably contains a curable compound. Examples of the curable compound include a thermosetting compound and an active energy ray curable compound.

Examples of the thermosetting compounds include phenol compounds, epoxy compounds, urea compounds, melamine compounds, urethane compounds, polyimide compounds and unsaturated polyester compounds. The active energy ray-curable compound is preferably a photocurable compound, preferably an ultraviolet-curable compound, and a polyfunctional (meth)acryl monomer having a plurality of (meth)acryloyl groups or a (meth)acryloyl group. A polymer of a polyfunctional (meth)acrylic monomer having a plurality of is more preferable.

Examples of the polyfunctional (meth)acrylic monomer include tripropylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, tripropylene glycol di. (Meth)acrylate, ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, modified bisphenol A di(meth)acrylate, tricyclode Bifunctional (meth)acrylates such as candimethanol di(meth)acrylate; pentaerythritol tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane ethoxytri(meth)acrylate, polyether tri(meth)acrylate , Trifunctional (meth)acrylates such as glycerinpropoxytri(meth)acrylate; tetrafunctional (meth)acrylates such as pentaerythritol tetra(meth)acrylate, pentaerythritol ethoxytetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate A pentafunctional or higher (meth)functional group such as dipentaerythritol penta(meth)acrylate, propionic acid-modified dipentaerythritol penta(meth)acrylate, dipentaerythritol monohydroxypenta(meth)acrylate, dipentaerythritol hexa(meth)acrylate Mention may be made of acrylates. As for the said polyfunctional (meth)acrylic monomer, only 1 type may be used and 2 or more types may be used together.

The term "(meth)acrylate" refers to acrylate and methacrylate. The term "(meth)acrylic" refers to acrylic and methacrylic. The term "(meth)acryloyl" refers to acryloyl and methacryloyl.

Further, a photopolymerization initiator, a photosensitizer, a leveling agent, a diluent and the like may be added to the active energy ray-curable compound.

Moreover, when using the said thermosetting compound, you may add a thermosetting agent, a leveling agent, a diluent, etc. to the said thermosetting compound.

From the viewpoint of making the antiglare film even thinner, the thickness of the antiglare layer is preferably 1 μm or more, more preferably 3 μm or more, preferably 300 μm or less, more preferably 200 μm or less.

[particle]
The 10% compression elastic modulus of the particles is 4500 N/mm ² or more. The compression recovery rate of the particles is 50% or more. The average particle diameter of the particles is 1 μm or more and 15 μm or less.

Since the present invention is provided with the above-described configuration, scratch resistance can be enhanced, and color unevenness can be reduced by making light scattering uniform.

From the viewpoint of further reducing color unevenness, the content of the particles is preferably 10% by weight or more, more preferably 30% by weight or more, and preferably 60% by weight or less in 100% by weight of the antiglare layer. , And more preferably 40% by weight or less.

The 10% compression elastic modulus is a compression elastic modulus when the particles are compressed by 10%. From the viewpoint of sufficiently enhancing the scratch resistance, the 10% compression elastic modulus of the particles is 4500 N/mm ² or more. From the viewpoint of further enhancing the scratch resistance, the 10% compression elastic modulus of the particles is preferably 5000 N/mm ² or more, more preferably 5500 N/mm ² or more, preferably 10000 N/mm ² or less, more preferably Is 8000 N/mm ² or less.

The 10% compression elastic modulus of the above particles can be measured as follows.

Using a micro compression tester, particles are compressed on a smooth indenter end face of a cylinder (diameter 50 μm, made of diamond) under the conditions of 25° C. and a maximum test load of 20 mN for 60 seconds. At this time, the load value (N) and the compression displacement (mm) are measured. From the obtained measured value, the compression elastic modulus can be calculated by the following formula. As the above-mentioned micro compression tester, for example, "Fisherscope H-100" manufactured by Fisher, Inc. is used.

10% compression elastic modulus (N/mm ² )=(3/2 ^1/2 )·F·S ⁻³ / ² ·R ^−1/2
F: Load value (N) when particles are compressed and deformed by 10%
S: Compressive displacement (mm) when the particles are compressed and deformed by 10%
R: radius of particle (mm)

From the viewpoint of sufficiently enhancing the scratch resistance, the compression recovery rate of the particles is 50% or more. From the viewpoint of further enhancing the scratch resistance, the compression recovery rate of the particles is preferably 55% or more, more preferably 60% or more. The upper limit of the compression recovery rate of the particles is not particularly limited. The compression recovery rate of the particles may be 100% or less.

The compression recovery rate of the particles can be measured as follows.

Disperse the particles on the sample table. A load (reverse load value) is applied to one of the dispersed particles in the direction of the center of the particle until the particle is compressed and deformed by 30% using a micro compression tester. Then, unloading is performed up to the load value for origin (0.40 mN). The load-compressive displacement during this period is measured, and the compression recovery rate can be obtained from the following formula. The load speed is 0.33 mN/sec. As the above-mentioned micro compression tester, for example, "Fisherscope H-100" manufactured by Fisher, Inc. is used.

Compression recovery rate (%)= [L2/ L1]×100
L1: Compressive displacement from load value for origin to reverse load value when load is applied L2: Unload displacement from reverse load value to load value for origin when releasing load

From the viewpoint of sufficiently reducing color unevenness, the average particle size of the particles is 1 μm or more and 15 μm or less. From the viewpoint of further reducing color unevenness, the average particle size of the above particles is preferably 2 μm or more, more preferably 3 μm or more, preferably 10 μm or less, more preferably 9 μm or less.

The average particle size is obtained by observing the particles with a scanning electron microscope and arithmetically averaging the maximum sizes of 50 particles selected arbitrarily in the observed image.

From the viewpoint of further reducing color unevenness, the ratio of the average particle diameter of the particles to the thickness of the antiglare layer (average particle diameter of particles/thickness of antiglare layer) is preferably 0.003 or more, and more preferably Is 0.02 or more, preferably 2 or less, more preferably less than 1, and further preferably 0.5 or less.

From the viewpoint of further enhancing the dispersibility of the particles in the antiglare layer, making the light scattering more uniform, and further reducing the color unevenness, the particles preferably have a hydrophilic group on the surface. Preferred examples of the hydrophilic group include a hydroxyl group, an amino group, an epoxy group, a (meth)acrylic group, an isocyanate group and a carboxyl group.

Examples of the method of introducing a hydrophilic group onto the surface of the particles include a method of coating or modifying the surface of the particle with a metal coupling agent, an emulsifier, a polymer dispersant, or the like.

From the viewpoint of making the light scattering more uniform and further reducing the color unevenness, in the particles contained in the antiglare layer, the average particle diameter is at least twice the average particle diameter of the particles. It is preferred that no particles are present. Further, when there is a particle having an average particle diameter of 2 times or more of the average particle diameter of the above particles, the above-mentioned prevention is performed from the viewpoint of making the light scattering more uniform and further reducing the color unevenness. In the particles contained in the glare layer, the average particle diameter is relative to the average particle diameter of the particles in 100% of the total number of particles having an average particle diameter of at least 2 times the average particle diameter of the particles. Are preferably present in a number of 0.1% or less, and more preferably in a number of 0.01% or less.

From the viewpoint of making the light scattering more uniform and further reducing the color unevenness, the coefficient of variation (CV value) of the particle diameter of the particles is preferably 7% or less, more preferably 5% or less. The lower limit of the CV value of the particle diameter of the particles is not particularly limited. The CV value may be 1% or more.

The coefficient of variation (CV value) of the particle diameter of the particles can be measured as follows.

CV value (%)=(ρ/Dn)×100
ρ: Standard deviation of particle size of particles Dn: Average value of particle size of particles

From the viewpoint of further improving the effect of reducing the reflected light intensity of the antiglare film, the refractive index of the particles is preferably 1.5 or more, more preferably 1.53 or more, still more preferably 1.55 or more. Yes, it is preferably less than 1.7, more preferably less than 1.65, and even more preferably less than 1.63.

The refractive index of the particles can be measured as follows.

A film having the same composition as the particles and having a thickness of about 1 μm is prepared. After roughening the surface of the film with sandpaper #400, a matte black paint is applied. After that, a spectrophotometer (“UV-3101PC” manufactured by Shimadzu Corp.) is used to measure the reflectance spectrum of one side of the light wavelength of 380 to 780 nm at an incident angle of 5°. The reflectance of the film at the light wavelength of 550 nm in the obtained reflectance spectrum is defined as the reflectance of the particles. The reflectance spectrum of one side of the light wavelength of 380 to 780 nm obtained by measuring the reflectance of the film was analyzed using the optical property calculation software ("WVASE32" manufactured by JA Woollam Japan Co., Ltd.) to refract the film. The refractive index of the particles is calculated by calculating the index.

From the viewpoint of making the light scattering more uniform and further reducing the color unevenness, the regular reflectance of the particles is preferably 2% or less, more preferably 1% or less.

Examples of the particles include resin particles, inorganic particles other than metal particles, and organic-inorganic hybrid particles. The particles may be core-shell particles including a core and a shell arranged on the surface of the core. The core may be an organic core. The shell may be an inorganic shell. Particles excluding metal particles are preferable, and resin particles, inorganic particles excluding metal particles, or organic-inorganic hybrid particles are more preferable. Resin particles or organic-inorganic hybrid particles are particularly preferable because they are more excellent in the effect of the present invention.

From the viewpoint of further enhancing the scratch resistance, making the light scattering more uniform, and further reducing the color unevenness, the particles are preferably resin particles.

Examples of the material of the particles include vinyl compounds, (meth)acrylic compounds, α-olefin compounds, diene compounds, silicone compounds and epoxy compounds. From the viewpoint of further enhancing the scratch resistance, further uniformly scattering the light and further reducing the color unevenness, the material of the particles is a vinyl compound, a (meth)acrylic compound, an α-olefin compound, a diene compound. Or a silicone compound is preferable.

Specific examples of the particles include polyolefin resins such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyisobutylene, and polybutadiene; acrylic resins such as polymethyl methacrylate and polymethyl acrylate; polyalkylene terephthalate, polycarbonate. , Polyamide, phenol formaldehyde resin, melamine formaldehyde resin, benzoguanamine formaldehyde resin, urea formaldehyde resin, phenol resin, melamine resin, benzoguanamine resin, urea resin, epoxy resin, unsaturated polyester resin, saturated polyester resin, polysulfone, polyphenylene oxide, polyacetal, Examples thereof include polyimide, polyamideimide, polyetheretherketone, polyethersulfone, and polymers obtained by polymerizing one or more kinds of various polymerizable monomers having an ethylenically unsaturated group.

Since the hardness and average particle diameter of the particles can be easily controlled within a suitable range, the resin for forming the particles is obtained by polymerizing one or more polymerizable monomers having a plurality of ethylenically unsaturated groups. It is preferable that the polymer is a polymer.

The particles, when obtained by polymerizing a monomer having an ethylenically unsaturated group, the monomer having an ethylenically unsaturated group, a non-crosslinkable monomer and a crosslinkable monomer Are listed.

Examples of the non-crosslinkable monomer include vinyl compounds such as styrene-based monomers such as styrene, α-methylstyrene and chlorostyrene; methyl vinyl ether, ethyl vinyl ether, propyl vinyl ether, and 1,4-butanedioldiene. Vinyl ether compounds such as vinyl ether, cyclohexane dimethanol divinyl ether, diethylene glycol divinyl ether; acid vinyl ester compounds such as vinyl acetate, vinyl butyrate, vinyl laurate, vinyl stearate; halogen-containing monomers such as vinyl chloride and vinyl fluoride. As a (meth)acrylic compound, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, cetyl (meth) Alkyl (meth)acrylate compounds such as acrylate, stearyl (meth)acrylate, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate; 2-hydroxyethyl (meth)acrylate, glycerol (meth)acrylate, polyoxyethylene (meth)acrylate , An oxygen atom-containing (meth)acrylate compound such as glycidyl (meth)acrylate; a nitrile-containing monomer such as (meth)acrylonitrile; a halogen-containing (meth)acrylate such as trifluoromethyl (meth)acrylate, pentafluoroethyl (meth)acrylate ) Acrylate compounds; α-olefin compounds such as diisobutylene, isobutylene, linearene, ethylene and propylene olefin compounds; conjugated diene compounds such as isoprene and butadiene.

Examples of the crosslinkable monomer include vinyl compounds such as vinyl compounds such as divinylbenzene, 1,4-divinyloxybutane, and divinylsulfone; and (meth)acrylic compounds such as tetramethylolmethanetetra( (Meth)acrylate, tetramethylolmethane tri(meth)acrylate, tetramethylolmethane di(meth)acrylate, trimethylolpropane tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol penta(meth)acrylate, glycerol Tri(meth)acrylate, glycerol di(meth)acrylate, (poly)ethylene glycol di(meth)acrylate, (poly)propylene glycol di(meth)acrylate, (poly)tetramethylene glycol di(meth)acrylate, 1,4 A polyfunctional (meth)acrylate compound such as butanediol di(meth)acrylate; as an allyl compound, triallyl(iso)cyanurate, triallyl trimellitate, diallyl phthalate, diallyl acrylamide, diallyl ether; as a silicone compound, tetramethoxysilane , Tetraethoxysilane, triethylsilane, t-butyldimethylsilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, isopropyltrimethoxysilane, isobutyltrimethoxysilane, cyclohexyltrimethoxysilane, n -Hexyltrimethoxysilane, n-octyltriethoxysilane, n-decyltrimethoxysilane, phenyltrimethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diisopropyldimethoxysilane, trimethoxysilylstyrene, γ-(meth)acryloxy Silane alkoxide compounds such as propyltrimethoxysilane, 1,3-divinyltetramethyldisiloxane, methylphenyldimethoxysilane, diphenyldimethoxysilane; vinyltrimethoxysilane, vinyltriethoxysilane, dimethoxydimethylvinylsilane, dimethoxyethylvinylsilane, Diethoxymethyldivinylsilane, diethoxyethylvinylsilane, ethylmethyldivinylsilane, methylvinyldimethoxysilane, ethylvinyldimethoxysilane, methylvinyldiethoxysilane, ethylvinyldiethoxysilane, p-styryltrimethoxysilane, 3 -Methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, etc. Bond-containing silane alkoxides; cyclic siloxanes such as decamethylcyclopentasiloxane; silicone oils modified at one end, silicone oils modified at both ends, modified (reactive) silicone oils such as side chain silicone oils; (meth)acrylic acid, maleic acid, Examples include carboxyl group-containing monomers such as maleic anhydride.

The resin particles can be obtained by polymerizing the polymerizable monomer having an ethylenically unsaturated group by a known method. Examples of this method include a method of performing suspension polymerization in the presence of a radical polymerization initiator, and a method of swelling a monomer together with a radical polymerization initiator using non-crosslinked seed particles to perform polymerization.

When the particles are inorganic particles excluding metal particles or organic-inorganic hybrid particles, examples of the inorganic material as the material of the particles include silica and carbon black. It is preferable that the inorganic substance is not a metal. The particles formed of the above silica are not particularly limited, but for example, after hydrolyzing a silicon compound having two or more hydrolyzable alkoxysilyl groups to form crosslinked polymer particles, firing is optionally performed. Particles obtained by carrying out are included. Examples of the organic-inorganic hybrid particles include organic-inorganic hybrid particles formed of a crosslinked alkoxysilyl polymer and an acrylic resin.

[Supporting film]
The antiglare film according to the present invention may include a support film and the antiglare layer disposed on the surface of the support film.

The support film may be composed of a single-layer film of one layer, or may be composed of a multilayer film of two or more layers. In the case of the above-mentioned multilayer film, it may be composed of a protective layer, an adhesive layer, a release layer and the like.

The support film preferably has high light transmittance. The material of the support film is not particularly limited, for example, polyolefin, polyether sulfone, polysulfone, polycarbonate, cycloolefin polymer, polyarylate, polyamide, polymethylmethacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, Examples include triacetyl cellulose, o and cellulose nanofibers. The support film is preferably made of resin. As the material of the support film, only one type may be used, or two or more types may be used in combination.

Further, the support film may contain various additives. Examples of the additives include various stabilizers, ultraviolet absorbers, antioxidants, antistatic agents, plasticizers, coupling agents, lubricants or colorants.

[Display device]
The antiglare film according to the present invention is preferably used by being disposed on the surface of the display section of a display device.

A display device according to the present invention includes a display unit and the antiglare film described above, and the antiglare film is disposed on the surface of the display unit.

The display device is not particularly limited, and a known display device such as a liquid crystal display can be used. The antiglare film can be preferably used for a display device for a touch panel.

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. The present invention is not limited to the following examples.

(Example 1)
(Synthesis of Particle 1)
20 parts by weight of benzoyl peroxide was added to 1000 parts by weight of divinylbenzene (purity 96%), and stirred until they were uniformly dissolved to obtain a monomer mixture solution. 4000 parts by weight of a 2% by weight aqueous solution obtained by dissolving polyvinyl alcohol having a molecular weight of about 1700 in pure water was placed in a reaction kettle. The obtained monomer mixed liquid was put in this and stirred for 4 hours to adjust the particle size of the monomer droplets to a predetermined particle size. Then, the reaction was performed for 9 hours in a nitrogen atmosphere at 90° C. to obtain particles. The obtained particles were washed several times each with hot water, methanol and acetone, and then classified to obtain particles 1. The average particle diameter of the particles 1 was 6.9 μm.

(Synthesis of particles 2)
Particles 2 were obtained in the same manner as the synthesis of particles 1 except that 800 parts by weight of divinylbenzene (96% purity) and 200 parts by weight of acrylonitrile were used instead of 1000 parts by weight of divinylbenzene (96% purity). .. The average particle diameter of the particles 2 was 7.2 μm.

(Synthesis of particles 3)
Instead of 1000 parts by weight of divinylbenzene (purity 96%), 500 parts by weight of divinylbenzene (purity 96%) and 500 parts by weight of tetramethylolmethane tetramethacrylate were used in the same manner as in the synthesis of the particle 1, and particles were obtained. Got 3. The average particle diameter of the particles 3 was 7.2 μm.

(Synthesis of particles 4)
Particle 4 was obtained in the same manner as the synthesis of particle 1 except that the classification operation was not performed. The average particle diameter of the particles 4 was 8.3 μm.

(Synthesis of particles 5)
Particle 5 was obtained in the same manner as in the synthesis of particle 1 except that particles having a relatively large average particle diameter were selected by a classification operation. The average particle diameter of the particles 5 was 14.5 μm.

(Synthesis of Particle A)
Particles A were obtained in the same manner as the synthesis of the particles 1, except that 1000 parts by weight of polyethylene glycol dimethacrylate was used instead of 1000 parts by weight of divinylbenzene (purity 96%). The average particle diameter of the particles A was 6.5 μm.

(Synthesis of Particle B)
Particle B was prepared in the same manner as Particle 1 except that 800 parts by weight of divinylbenzene (purity 57%) and 200 parts by weight of vinyltrimethoxysilane were used instead of 1000 parts by weight of divinylbenzene (purity 96%). Got The average particle diameter of the particles B was 7.0 μm.

(Synthesis of particles C)
Particle C was obtained in the same manner as in the synthesis of particle 1 except that particles having a relatively large average particle diameter were selected by a classification operation. The average particle diameter of the particles C was 16.0 μm.

(Example 1)
(Preparation of antiglare film)
100 parts by weight of a mixture of dipentaerythritol penta and dipentaerythritol hexaacrylate (“Aronix M402” manufactured by Toagosei Co., Ltd.), 90 parts by weight of toluene, and 10 parts by weight of cyclohexanone were mixed to obtain a mixed solution. 10 parts by weight of the particles 1 were dispersed in the obtained mixed liquid to prepare a particle mixed liquid for an antiglare film.

The particle mixture solution for an antiglare film was applied on a base material (supporting film) made of polyethylene terephthalate (PET) having a thickness of 0.2 mm with a bar coater. At this time, the coating amount of the particle liquid mixture was adjusted so that the thickness of the coating layer (antiglare layer) after drying was 10 μm (0.01 mm). After drying, the coating layer was cured by irradiating it with ultraviolet rays at 500 mJ/cm ² with a high pressure mercury lamp to prepare an antiglare film.

(Example 2)
An antiglare film was produced in the same manner as in Example 1 except that the particle 1 was changed to the particle 2.

(Example 3)
An antiglare film was produced in the same manner as in Example 1 except that the particles 1 were changed to the particles 3.

(Example 4)
An antiglare film was produced in the same manner as in Example 1 except that the particles 1 were changed to the particles 4.

(Example 5)
An antiglare film was produced in the same manner as in Example 1 except that the particles 1 were changed to the particles 5.

(Comparative Example 1)
An antiglare film was produced in the same manner as in Example 1 except that the particle 1 was changed to the particle A.

(Comparative example 2)
An antiglare film was produced in the same manner as in Example 1 except that the particle 1 was changed to the particle B.

(Comparative example 3)
An antiglare film was produced in the same manner as in Example 1 except that the particle 1 was changed to the particle C.

(Comparative Example 4)
An anti-glare film was produced in the same manner as in Example 1 without adding particles when producing the anti-glare film.

(Evaluation)
(1) Average Particle Diameter of Particles The particles were observed by a scanning electron microscope (SEM), and the maximum diameter of arbitrarily selected 50 particles in the observed image was calculated by arithmetically averaging.

(2) 10% compression elastic modulus of particles The 10% compression elastic modulus of the particles was measured by the method described above using "Fisherscope H-100" manufactured by Fisher.

(3) Particle compression recovery rate The compression recovery rate of the particles was measured by the method described above using "Fisherscope H-100" manufactured by Fisher.

(4) Refractive index of particles Using a spectrophotometer "UV-3101PC" manufactured by Shimadzu Corporation, the refractive index of particles was measured by the method described above.

(5) Haze of Antiglare Film The haze of the obtained antiglare film was measured using a haze meter “TC-H3PDK” manufactured by Tokyo Denshoku Co., Ltd.

(6) Concavo-convexity The surface roughness measuring device "SV30000S4" manufactured by Mitutoyo Corporation was used to measure the concavo-convexity of the obtained antiglare layer. The unevenness was judged according to the following criteria.

[Judgment criteria for unevenness]
A: The absolute value of the difference between the height of the convex uppermost portion of the surface of the antiglare layer and the height of the concave lowermost portion of the surface of the antiglare layer is 30% or more and less than 50% with respect to the average particle diameter of the particles. B: The absolute value of the difference between the height of the convex uppermost portion of the surface of the antiglare layer and the height of the concave lowermost portion of the surface of the antiglare layer is 10% or more and less than 30% with respect to the average particle diameter of the particles. C: The absolute value of the difference between the height of the convex uppermost portion of the surface of the antiglare layer and the height of the concave lowermost portion of the surface of the antiglare layer is 0% or more and less than 10% with respect to the average particle diameter of the particles.

(7) Evaluation of scratch resistance The surface of the obtained antiglare film was rubbed with steel wool (“Bonster #0000” manufactured by Nippon Steel Wool Co., Ltd.) 20 times at 250 g/cm ² , and the presence or absence of scratches was visually observed. .. The scratch resistance was judged according to the following criteria.

[Criteria for scratch resistance]
○: No scratch △: Slight scratch
×: There is a scratch

(8) Color unevenness evaluation The obtained anti-glare film was evaluated for the degree of glare of light from a fluorescent lamp. This evaluation was visually confirmed. Color unevenness was judged according to the following criteria.

[Criteria for color unevenness]
○ ○: Almost no glare ○: Little glare △: Glare ×: Many glare

The results are shown in Table 1 below.

1, 1A... Antiglare film 2... Antiglare layer 2a... First surface 2b... Second surface 11... Particles 12... Antiglare layer main body 21... Support film

Claims (9)

An antiglare layer main body, and an antiglare layer containing a plurality of particles,
The particles are resin particles,
The resin forming the particles is a polymer obtained by polymerizing one or more polymerizable monomers having a plurality of ethylenically unsaturated groups,
10% compression modulus of the particles is 4500 N/mm ² or more,
The following compression recovery rate of the particles is 50% or more,
An antiglare film in which the average particle diameter of the particles is 1 μm or more and 15 μm or less.
Compression recovery rate (%)=[L2/L1]×100
L1: Compressive displacement from load value for origin to reverse load value when applying load
L2: Unloading displacement from the reverse load value when releasing the load to the origin load value The antiglare film according to claim 1, wherein the particles have a hydrophilic group on the surface. Among the particles contained in the antiglare layer, there is no particle having an average particle diameter of 2 times or more of the average particle diameter of the particles, or the particles are present in 100% of the total number of the particles. The anti-glare film according to claim 1 or 2, wherein the number of particles having an average particle diameter of 2 times or more of the average particle diameter of 0.1% or less is present. The antiglare film according to claim 1, wherein the particles have a refractive index of 1.5 or more and less than 1.7. The particles, with or without a portion protruding from the surface of the antiglare layer body,
When the particles have a portion protruding from the surface of the antiglare layer main body, the antiglare layer main body is included in 100% by volume of the total amount of the particles having the portion protruding from the surface of the antiglare layer main body. The antiglare film according to any one of claims 1 to 4, wherein the volume of the portion of the particle having a portion protruding from the surface of the antiglare layer main body is 50% by volume or less. .. The haze of the antiglare layer is not more than 2%, the antiglare film of any one of claims 1-5. Equipped with a support film,
Wherein the antiglare layer on the surface of the support film is disposed, antiglare film according to any one of claims 1-6. The antiglare film according to any one of claims 1 to 8 , which is used by being disposed on a surface of a display unit of a display device. Display part,
The antiglare film according to any one of claims 1 to 9 ,
A display device in which the antiglare film is disposed on the surface of the display unit.

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