WO2015145618A1 - Anti-glare hard coat film - Google Patents
Anti-glare hard coat film Download PDFInfo
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- WO2015145618A1 WO2015145618A1 PCT/JP2014/058552 JP2014058552W WO2015145618A1 WO 2015145618 A1 WO2015145618 A1 WO 2015145618A1 JP 2014058552 W JP2014058552 W JP 2014058552W WO 2015145618 A1 WO2015145618 A1 WO 2015145618A1
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- hard coat
- component
- fine particles
- antiglare hard
- coat layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/106—Esters of polycondensation macromers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
Definitions
- the present invention relates to an antiglare hard coat film.
- the present invention relates to an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
- incident light from the outside (hereinafter sometimes referred to as “external light”) is reflected on the screen.
- incident light hereinafter sometimes referred to as “external light”.
- a technique using a member having an antiglare hard coat layer has been implemented.
- a method of forming such an antiglare hard coat layer (1) a method of roughening the surface of the hard coat layer by a physical method when forming the hard coat layer, (2) for forming the hard coat layer
- the method is roughly divided into three types: a method of mixing a filler into a hard coating agent, and a method of (3) mixing two components that are incompatible with the hard coating agent for forming a hard coating layer and utilizing their phase separation. Can do.
- fine irregularities are formed on the surface of the hard coat layer to suppress regular reflection of external light and prevent reflection of external light such as a fluorescent lamp.
- the mainstream method is to mix a filler into the hard coat layer (see, for example, Patent Documents 1 and 2).
- Patent Document 1 (A) (a) a polyfunctional (meth) acrylate monomer and / or (meth) acrylate prepolymer and (b) reactive silica fine particles are formed on the surface of a transparent plastic film.
- a hard coat layer formed using a hard coat layer-forming material containing an active energy ray-sensitive composition, (B) spherical organic fine particles, and (C) a dispersant having at least one polar group in the molecule.
- an antiglare hard coat film characterized in that the hard coat layer has a thickness larger than the average particle size of (B) spherical organic fine particles.
- the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 6 to 10 ⁇ m.
- Patent Document 2 discloses a hard coat layer formed on the surface of a transparent plastic film using a hard coat layer forming material containing (A) an active energy ray-sensitive composition and (B) spherical organic fine particles.
- Anti-glare hard coat wherein the total haze value of the hard coat layer is 20% or less, and the value of “total haze value ⁇ internal haze value” is in the range of ⁇ 10 to + 1%.
- a film is disclosed.
- the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 1 to 10 ⁇ m.
- the anti-glare hard coat film disclosed in Patent Document 1 can obtain a predetermined anti-glare property, the average particle diameter of the spherical organic fine particles is large, resulting in a glare feeling on the screen ( Hereinafter, there is a problem that it may be referred to as “glare”.
- glare when applied to a high-definition display with a high resolution, it has become difficult to suppress the occurrence of glare, and there has been a problem that comfort when viewing the screen is reduced.
- the antiglare hard coat film disclosed in Patent Document 2 is not sufficiently considered in the numerical range of the average particle diameter of the spherical organic fine particles, but also contains a dispersant in the hard coat layer forming material. As a result, there was a problem that it was difficult to sufficiently control the sedimentation of the spherical organic fine particles. As a result, not only is it difficult to stably obtain the predetermined antiglare property, but even if the predetermined antiglare property can be obtained, the spherical organic fine particles are excessively removed from the surface of the hard coat layer. In other words, there was a problem that the film could easily fall off and sufficient scratch resistance could not be obtained, and the antiglare property was likely to be lowered.
- an object of the present invention is to provide an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display. There is.
- an anti-glare hard coat film having an anti-glare hard coat layer on the surface of a plastic substrate, wherein the anti-glare hard coat layer is active energy ray curable as the component (A).
- Cured product of antiglare hard coat layer forming composition comprising resin, resin fine particles as component (B), dispersant as component (C), and photopolymerization initiator as component (D)
- the volume average particle diameter of the resin fine particles as the component (B) is set to a value within the range of 1 to 2.5 ⁇ m, and the blending amount of the resin fine particles as the component (B) is determined as the activity as the component (A).
- the dispersant as the component (C) has at least one polar group in the molecule, As a polar group, a carboxyl group, Compound having at least one selected from the group consisting of droxyl group, sulfo group, primary amino group, secondary amino group, tertiary amino group, amide group, quaternary ammonium base, pyridium base, sulfonium base and phosphonium base
- the blending amount of the dispersant as the component (C) is 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
- An anti-glare hard coat film characterized by having a value within the range is provided, and the above-described problems can be solved. That is, if it is an anti-glare hard coat film of the present invention, resin fine particles having a relatively small volume average particle diameter relative to the anti-glare hard coat layer forming composition for forming the anti-glare hard coat layer Therefore, even if it is applied to a high-definition display, the occurrence of glare can be effectively suppressed. In addition, since a predetermined dispersant is blended at a predetermined ratio, the sedimentation state of the resin fine particles in the coating film of the composition for forming an antiglare hard coat layer applied to the surface of the plastic substrate is effectively controlled.
- the anti-glare hard coat layer surface is stably formed with fine irregularities, and the resin particles have excellent anti-glare properties despite the volume average particle diameter being limited to a relatively small range. Can do. Therefore, the antiglare hard coat film of the present invention has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
- the resin fine particles as the component (B) are acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles. It is preferably at least one selected from the group consisting of By comprising in this way, a fine unevenness
- the composition for forming an antiglare hard coat layer contains silica fine particles as the component (E), and the volume of the silica fine particles as the component (E).
- the average particle diameter is set to a value in the range of 2 to 500 nm, and the blending amount of the silica fine particles as the component (E) is 10 to A value within the range of 200 parts by weight is preferred.
- the composition for forming an antiglare hard coat layer contains a slip agent as the component (F), and contains a slip agent as the component (F).
- the amount is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
- the slip agent as the component (F) is preferably silicone oil and modified silicone oil or one of them.
- the film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 ⁇ m.
- FIGS. 1 (a) to 1 (b) are diagrams for explaining the antiglare hard coat film of the present invention.
- FIG. 2 is a diagram provided for explaining the relationship between the volume average particle diameter of resin fine particles and the glare and antiglare property of the antiglare hard coat film.
- FIGS. 3A to 3E are diagrams for explaining a method for evaluating glare in an antiglare hard coat film.
- FIGS. 4A and 4B are diagrams for explaining a particle size distribution chart of resin fine particles in Examples 1 and 2.
- FIG. FIG. 5 is a diagram for explaining a particle size distribution chart of resin fine particles in Comparative Example 1.
- An embodiment of the present invention is an antiglare hard coat film 14 having an antiglare hard coat layer 13 on the surface of a plastic substrate 12, as shown in FIG.
- Layer 13 is an active energy ray-curable resin as component (A), resin fine particles as component (B), a dispersant as component (C), a photopolymerization initiator as component (D),
- the volume average particle diameter of the resin fine particles as the component (B) is in the range of 1 to 2.5 ⁇ m
- the amount of the resin fine particles is a value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A), and the dispersion as the component (C)
- the agent has at least one polar group in the molecule
- the polar group consists of carboxyl group, hydroxyl group, sulfo group, primary amino group, secondary amino group, tertiary amino group, amide group, quaternary ammonium base, pyr
- a compound having at least one selected from the group, and the blending amount of the dispersant as the component (C) is 0 to 2 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A)
- the antiglare hard coat film 14 has a value within the range (excluding 0 parts by weight).
- Anti-glare hard coat layer (1) Anti-glare hard coat layer forming composition
- the anti-glare hard coat layer in the anti-glare hard coat film of the present invention comprises an active energy ray-curable resin as component (A) and And a cured product of an antiglare hard coat layer forming composition comprising resin fine particles as component (B), a dispersant as component (C), and a photopolymerization initiator as component (D).
- component (A) active energy ray-curable resin
- B resin fine particles
- C dispersant
- D photopolymerization initiator
- active energy ray-curable resin As the type of active energy ray-curable resin as the component (A) contained in the composition for forming an antiglare hard coat layer in the present invention, It is not limited, and can be selected from conventionally known ones, and examples include energy ray-curable monomers, oligomers, resins, and mixtures thereof. More specifically, it is preferable to use a polyfunctional (meth) acrylic monomer or a (meth) acrylate prepolymer.
- polyfunctional (meth) acrylic monomer examples include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and polyethylene.
- Examples of the (meth) acrylate prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, and polyol acrylate.
- the polyester acrylate-based prepolymer for example, by esterifying hydroxyl groups of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid, or It can be obtained by esterifying a hydroxyl group at the terminal of an oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid with (meth) acrylic acid.
- the epoxy acrylate prepolymer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol-type epoxy resin or novolak-type epoxy resin and esterifying it.
- the urethane acrylate prepolymer can be obtained, for example, by esterifying, with (meth) acrylic acid, a polyurethane oligomer obtained by a reaction between polyether polyol or polyester polyol and polyisocyanate.
- the polyol acrylate-based prepolymer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid.
- These prepolymers may be used individually by 1 type, may be used in combination of 2 or more type, and may be used together with the polyfunctional (meth) acrylate type monomer mentioned above.
- Resin Fine Particle i) Type As the type of resin fine particle as component (B) contained in the composition for forming an antiglare hard coat layer in the present invention, for example, silicone resin fine particles , Modified silicone resin fine particles, melamine resin fine particles, acrylic polymer resin fine particles (for example, polymethyl methacrylate resin fine particles, etc.), acrylic-styrene copolymer resin fine particles, polycarbonate resin fine particles, polyethylene resin fine particles, styrene polymer Examples thereof include resin fine particles and benzoguanamine resin fine particles.
- At least one selected from the group consisting of acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles is preferable. This is because these resin fine particles can stably form fine irregularities on the surface of the antiglare hard coat layer. From the viewpoint of homogenizing the light scattering state and stabilizing the antiglare property, it is preferable that the resin fine particles have a spherical shape.
- the volume average particle diameter of the resin fine particles is set to a value within the range of 1 to 2.5 ⁇ m. This is because the occurrence of glare can be effectively suppressed while maintaining excellent anti-glare properties by setting the volume average particle diameter of the resin fine particles to a value within this range. That is, when the volume average particle diameter of the resin fine particles is less than 1 ⁇ m, it may be difficult to maintain sufficient antiglare properties. On the other hand, when the volume average particle diameter of the resin fine particles exceeds 2.5 ⁇ m, it may be difficult to effectively suppress the occurrence of glare particularly when applied to a high-definition display. .
- the volume average particle diameter of the resin fine particles is more preferably set to a value within the range of 1.2 to 2.3 ⁇ m, and further preferably set to a value within the range of 1.3 to 2 ⁇ m.
- the volume average particle diameter of the resin fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
- the horizontal axis represents the volume average particle diameter ( ⁇ m) of the resin fine particles
- the left vertical axis represents the glare (ppi) in the antiglare hard coat film
- the right vertical axis represents The characteristic curve B which took 60 degree specular glossiness (%) in an anti-glare hard coat film is shown.
- specific methods for measuring glare (ppi) and 60 ° specular gloss (%) in an antiglare hard coat film are described in Examples.
- the glare value tends to decrease as the volume average particle diameter of the resin fine particles increases.
- the glare value in the characteristic curve A should be set to a value exceeding 80 ppi in order to stably suppress the occurrence of glare.
- the volume average particle diameter of the resin fine particles should be 2.5 ⁇ m or less in order to set the glare value to a value exceeding 80 ppi and effectively suppress the glare.
- the 60 ° specular gloss also tends to decrease as the volume average particle diameter of the resin fine particles increases.
- the volume average particle diameter of the resin fine particles should be a value of 1 ⁇ m or more in order to set the 60 ° specular gloss to a value of 120% or less and stably obtain a predetermined antiglare property.
- the volume average particle diameter of the resin fine particles is set to 1-2. It is understood that the value should be in the range of 5 ⁇ m.
- the Cv value of the resin fine particles is preferably set to a value of 50% or less.
- the reason for this is that when the Cv value exceeds 50%, the abundance of particles having a particle size larger or smaller than the volume average particle size increases, and if the abundance of a large particle size increases, glare occurs. This is because it may be difficult to suppress the occurrence of the occurrence of an antiglare, and it may be difficult to obtain a desired antiglare property when the amount of small particle size increases. Therefore, the Cv value of the resin fine particles is more preferably 40% or less, and further preferably 30% or less.
- Cv value means the variation coefficient of the particle size distribution represented by following formula (1).
- Cv value (%) (standard deviation particle diameter / volume average particle diameter) ⁇ 100 (1)
- the Cv value can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
- Blending amount of the resin fine particles is set to a value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). And This is because fine irregularities are formed on the surface of the antiglare hard coat layer to obtain excellent antiglare properties. That is, when the amount of the resin fine particles is less than 0.1 parts by weight, fine irregularities cannot be sufficiently formed on the surface of the antiglare hard coat layer, and a desired antiglare property can be obtained. This is because it may be difficult. On the other hand, when the amount of the resin fine particles exceeds 20 parts by weight, the haze value becomes excessively large, and the visibility of the display image on the display may be lowered.
- the amount of the resin fine particles is more preferably set to a value within the range of 1 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is more preferable to set the value within the range.
- composition for forming an antiglare hard coat layer in the present invention is characterized by containing a dispersant as the component (C).
- a dispersant as the component (C).
- the reason for this is that when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is effectively settled by including a dispersant.
- the anti-glare hard coat layer surface is stably controlled to form fine irregularities, and the anti-glare property is excellent even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. It is because it can be obtained. That is, resin fine particles are unevenly distributed in a suitable range on the surface side of the antiglare hard coat layer, and fine irregularities on the surface of the antiglare hard coat layer can be stably formed. Obtainable.
- the dispersant as the component (C) contained in the composition for forming an antiglare hard coat layer in the present invention has at least one polar group in the molecule, and includes a carboxyl group, a hydroxyl group as the polar group. It is a compound having a group, a sulfo group, a primary amino group, a secondary amino group, a tertiary amino group, an amide group, a quaternary ammonium base, a pyridium base, a sulfonium base and a phosphonium base.
- polar groups described above a carboxyl group, a sulfo group, and a primary to tertiary amino group are particularly preferable. This is because these polar groups can more effectively coordinate the dispersant to the surface of the resin fine particles.
- one or more of the polar groups described above may be introduced into the molecule.
- a basic skeleton for bonding organic compounds having each polar group is required. As such a basic skeleton, an ester chain, a vinyl chain, an acrylic chain, Those composed of an ether chain and a urethane chain are preferred.
- a part of hydrogen atoms in these molecules may be substituted with a halogen atom.
- acrylic resins, urethane resins, polyester resins and alkyd resins are preferred, and acrylic resins, urethane resins and polyester resins are particularly preferred.
- the polar group mentioned above may be arrange
- numerator by a block structure or a graft structure is preferable. This is because the adsorption performance to the resin fine particles is enhanced by the polar group being arranged at the terminal portion.
- the molecular weight of the dispersant is not particularly limited, but can be selected from a wide range of from 100 to 900,000.
- a dispersing agent may be used individually by 1 type, and may be used in combination of 2 or more type.
- the blending amount of the dispersant is in the range of 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is characterized by being a value within. This is because the resin fine particles can be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer. That is, when the blending amount of the dispersant is 0 part by weight, the resin fine particles cannot be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer, and it becomes difficult to obtain a desired antiglare property. Because there is. On the other hand, if the blending amount of the dispersant exceeds 2 parts by weight, the scratch resistance may decrease.
- the blending amount of the dispersant is more preferably set to a value within the range of 0.01 to 1 part by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 0.5 parts by weight.
- composition for forming an antiglare hard coat layer in the present invention preferably contains silica fine particles as the component (E). This is because when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is more effectively controlled to prevent This is because fine irregularities can be more stably formed on the surface of the dazzling hard coat layer. That is, by utilizing the difference in specific gravity with the resin fine particles, the resin fine particles are unevenly distributed on the surface side of the antiglare hard coat layer in a more suitable range, and the fine irregularities on the surface of the antiglare hard coat layer are more stable. Thus, excellent antiglare properties can be obtained.
- silica fine particles having a surface functional group examples include silica fine particles having a group containing a (meth) acryloyl group as the surface functional group (hereinafter sometimes referred to as reactive silica fine particles).
- reactive silica fine particles can be obtained, for example, by reacting a silanol group on the surface of the silica fine particles with a polymerizable unsaturated group-containing organic substance having a functional group capable of reacting with the silanol group.
- Examples of the polymerizable unsaturated group include a radical polymerizable (meth) acryloyl group.
- Examples of the polymerizable unsaturated group-containing organic compound having a functional group capable of reacting with a silanol group include acrylic acid, acrylic acid chloride, 2-isocyanatoethyl acrylate, glycidyl acrylate, and 2,3-acrylic acid. Iminopropyl, 2-hydroxyethyl acrylate, acryloyloxypropyltrimethoxysilane, and the like, and methacrylic acid derivatives corresponding to these acrylic acid derivatives can be preferably used. In addition, these acrylic acid derivatives and methacrylic acid derivatives may be used individually by 1 type, and may be used in combination of 2 or more type.
- volume average particle size of the silica fine particles is preferably set to a value in the range of 2 to 500 nm. This is because when the volume average particle diameter of the silica fine particles is less than 2 nm, the dispersion stability of the silica fine particles may decrease. On the other hand, when the volume average particle diameter of the silica fine particles exceeds 500 nm, the haze value may excessively increase due to the silica fine particles. Accordingly, the volume average particle diameter of the silica fine particles is more preferably set to a value within the range of 4 to 300 nm, and further preferably set to a value within the range of 6 to 50 nm. The volume average particle diameter of the silica fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
- the blending amount of the silica fine particles is preferably set to a value within the range of 10 to 200 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
- the reason for this is that if the amount of silica fine particles is less than 10 parts by weight, it may be difficult to make the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer.
- the blending amount of the silica fine particles exceeds 200 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin.
- the blending amount of the silica fine particles is more preferably 12 to 175 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A), preferably 15 to 150 parts by weight. It is more preferable to set the value within the range.
- the blending amount of the photopolymerization initiator should be a value within the range of 0.2 to 10 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). Is preferred. This is because it may be difficult to obtain sufficient curability when the blending amount of the photopolymerization initiator is less than 0.2 parts by weight. On the other hand, when the blending amount of the photopolymerization initiator exceeds 10 parts by weight, the scratch resistance may be lowered. Accordingly, the blending amount of the photopolymerization initiator is more preferably set to a value within the range of 0.5 to 7 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 5 parts by weight.
- the antiglare hard coat layer forming composition in the present invention preferably contains a slip agent as the component (F).
- a slip agent as the component (F).
- the scratch resistance of the antiglare hard coat film can be improved by including a slip agent. That is, in the present invention, since the volume average particle diameter of the resin fine particles as the component (B) is limited to a relatively small range, the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer are caused by friction or the like. It may be easy to drop off.
- the slip agent by improving the slip property of the antiglare hard coat layer surface by the slip agent, the predetermined fine scratch resistance can be obtained even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. Obtainable.
- slip agent is preferably silicone oil and modified silicone oil or one of them. This is because these slip agents are excellent in compatibility with other components in the antiglare hard coat layer forming composition, and further improve the scratch resistance in the antiglare hard coat film. Because it can. More specifically, silicone-modified urethane acrylate and a mixture of urethane acrylate, polydimethylsiloxane, modified polydimethylsiloxane and the like can be mentioned.
- the blending amount of the slip agent is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). .
- the blending amount of the slip agent is less than 0.05 parts by weight, sufficient slip properties cannot be obtained, and it may be difficult to obtain sufficient scratch resistance.
- the blending amount of the slip agent exceeds 20 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin. Therefore, the blending amount of the slip agent is more preferably 0.5 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of parts by weight.
- composition for forming antiglare hard coat layer used in the present invention may be used as an essential component described above in an appropriate solvent, if necessary. It can be prepared by adding the components A) to (D) and the optional components (E) to (F) and dissolving or dispersing them. At this time, in addition to the components (A) to (F), for example, an antioxidant, an ultraviolet absorber, a silane coupling agent, a light stabilizer, a leveling agent, an antifoaming agent and the like can be added.
- the solvent used examples include aliphatic hydrocarbons such as hexane and heptane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as methylene chloride and ethylene chloride, methanol, ethanol, propanol, and butanol. Alcohols, acetone, methyl ethyl ketone, ketones such as 2-pentanone, isophorone and cyclohexanone, esters such as ethyl acetate and butyl acetate, cellosolve solvents such as ethyl cellosolve and the like.
- the concentration and viscosity of the antiglare hard coat layer forming composition thus prepared may be in a numerical range that can be coated on the surface of the plastic substrate, and should be appropriately selected according to the situation. Can do.
- the film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 ⁇ m. This is because when the film thickness of the antiglare hard coat layer is less than 0.5 ⁇ m, it may be difficult to obtain the hardness required for actual use in pencil hardness. On the other hand, when the film thickness of the antiglare hard coat layer exceeds 6 ⁇ m, curling due to the curing shrinkage of the active energy ray curable resin and antiglare generated when the antiglare hard coat film is bent. This is because it may be difficult to suppress cracks in the conductive hard coat layer. Therefore, the film thickness of the antiglare hard coat layer is more preferably set to a value within the range of 1 to 6 ⁇ m, and further preferably set to a value within the range of 2 to 5 ⁇ m.
- Plastic substrate As the type of plastic substrate in the present invention, it can be appropriately selected from known plastic substrates as a substrate for conventional optical hard coat films, such as polyethylene terephthalate, polybutylene terephthalate, Polyester film such as polyethylene naphthalate, polyethylene film, polypropylene film, cellophane, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, polystyrene, polycarbonate , Polymethylpentene, polysulfone, polyether ether ketone, polyether sulfone, polyether imide, polyimide, fluororesin, poly Examples include imide, acrylic resin, norbornene resin, and cycloolefin resin.
- the film thickness of the plastic substrate is preferably set to a value in the range of 15 to 300 ⁇ m, and more
- the antiglare hard coat film of the present invention can be bonded to a polarizer to form a polarizing plate 20. That is, a film 12a having no optical anisotropy, such as a triacetylcellulose (TAC) film, is used as a plastic substrate, and an antiglare hard coat layer 13 is formed on one surface thereof, and an antiglare hard coat film 14 is formed. And Next, a TAC film 12a having an antiglare hard coat layer 13 formed on one surface of the polyvinyl alcohol polarizer 11 is laminated via an adhesive layer 15a, and an antiglare hard disk is formed on the opposite surface of the polyvinyl alcohol polarizer.
- TAC triacetylcellulose
- the TAC film 12b on which the coat layer 13 is not formed is laminated via the adhesive layer 15b.
- the polarizing plate 20 which can suppress generation
- the polarizing plate 20 may be provided with an adhesive layer 16 and a release sheet 17 for bonding to an optical component such as a liquid crystal cell.
- Characteristics of antiglare hard coat film (1) 60 ° specular gloss
- the 60 ° specular gloss of an antiglare hard coat film measured in accordance with JIS Z 8741 may be 130% or less. preferable. This is because it may be difficult to obtain excellent antiglare properties when the 60 ° specular glossiness exceeds 130%. Accordingly, the 60 ° specular gloss of the antiglare hard coat film measured in accordance with JIS Z 8741 is more preferably 120% or less, and even more preferably 115% or less.
- ppi pixel / inch
- the glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition. Therefore, the larger the ppi value mentioned above, the more effectively the occurrence of glare can be suppressed.
- the haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is preferably set to a value in the range of 3 to 40%. The reason for this is that when the haze value is less than 3%, it may be difficult to obtain excellent antiglare properties. On the other hand, if the haze value exceeds 40%, the visibility of the display image on the display may be lowered. Accordingly, the haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is more preferably set to a value in the range of 3.5 to 35%, and a value in the range of 4 to 30%. More preferably.
- the total light transmittance of the anti-glare hard coat film measured based on JIS K 7361 is more preferably 88% or more, and even more preferably 90% or more.
- an anti-glare hard coat film is a thing without an external appearance change in the abrasion-resistant evaluation using steel wool. This is because it may be difficult to obtain sufficient scratch resistance as a hard coat film when a change in appearance is observed in the evaluation of scratch resistance. Details of the evaluation of the scratch resistance will be described later.
- a composition for forming an antiglare hard coat layer on the surface of a plastic substrate is a conventionally known method, For example, the coating is performed using a bar coating method, a knife coating method, a roll coating method, a blade coating method, a die coating method, a gravure coating method, or the like. Subsequently, after drying a coating film, an active energy ray is irradiated, a coating film is hardened, and an anti-glare hard coat film is obtained by making a coating film into an anti-glare hard coat layer.
- the active energy ray for curing the coating film includes ultraviolet rays, and the ultraviolet rays can be irradiated by a high-pressure mercury lamp, an electrodeless lamp, a metal halide lamp, a xenon lamp, or the like.
- the irradiation amount of ultraviolet rays is usually in the range of 100 to 500 mJ / cm 2 .
- Example 1 Production of Antiglare Hard Coat Film (1) Preparation Step of Composition for Forming Antiglare Hard Coat Layer
- active energy ray-curable resin as component (A), and (B) Resin fine particles as a component, a dispersant as a component (C), a photopolymerization initiator as a component (D), a silica fine particle as a component (E), and a slip agent as a component (F).
- active energy ray-curable resin as component (A)
- B) Resin fine particles as a component
- a dispersant as a component (C)
- a photopolymerization initiator as a component
- D silica fine particle
- E silica fine particle
- a slip agent as a component
- Cv value of the component (B) means a variation coefficient of the particle size distribution represented by the following formula (1).
- Cv value (%) (standard deviation particle diameter / volume average particle diameter) ⁇ 100 (1)
- the volume average particle size and Cv value of the component (B) were measured using a laser diffraction / scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.). At this time, methyl ethyl ketone was used as a dispersion solvent.
- the particle size distribution chart of (B) component used in Example 1 is shown to Fig.4 (a).
- the obtained composition for forming an antiglare hard coat layer was easily made into a polyester film with an easy-adhesion layer as a plastic substrate (manufactured by Toray Industries, Inc., Lumirror U48, film thickness: 100 ⁇ m).
- the wire layer # 14 was applied to the adhesive layer so that the film thickness after curing was 5 ⁇ m to form a coating layer.
- the dried coating layer is irradiated with ultraviolet rays under the following conditions using an ultraviolet irradiation device (GS Yuasa Corporation, light source: high-pressure mercury lamp) to cure the coating layer.
- an ultraviolet irradiation device GS Yuasa Corporation, light source: high-pressure mercury lamp
- Evaluation 1 of antiglare property The antiglare property of the obtained antiglare hard coat film was evaluated. That is, the obtained antiglare hard coat film was placed on a black plate so that the antiglare hard coat layer was on top. Next, a three-wavelength fluorescent lamp was turned on above the antiglare hard coat film, reflected by the antiglare hard coat film, and evaluated according to the following criteria. The obtained results are shown in Table 2. ⁇ : The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is blurred. ⁇ : The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is not blurred.
- Anti-glare evaluation 2 The antiglare property of the obtained antiglare hard coat film was evaluated based on the specular gloss (%). That is, using a gloss meter (Nippon Denshoku Industries Co., Ltd., VG2000), the 60 ° specular gloss (%) of the obtained antiglare hard coat film was measured according to JIS Z 8741. The obtained results are shown in Table 2.
- a lattice pattern provided with a light transmission portion so as to be 60 ppi (pixels / inch) was prepared.
- Such a lattice-shaped pattern was prepared by providing a metal vapor deposition layer on a glass plate, performing a resist treatment on the metal vapor deposition layer, etching, and then removing the resist.
- the prepared grid pattern was placed on a backlight (Bright Box 5000, manufactured by King Corp.).
- the obtained antiglare hard coat film was placed on the lattice pattern so that the antiglare hard coat layer was on top, and the occurrence of glare was confirmed.
- the antiglare hard coat film is moved in a direction parallel to the lattice pattern, and when the occurrence of the glare previously confirmed moves together with the antiglare hard coat film, the glare It was judged that the occurrence of the phenomenon was caused by the antiglare hard coat film.
- the antiglare hard coat was sequentially used by increasing the ppi in increments of 10 ppi. The same operation was repeated until the occurrence of glare caused by the film was confirmed.
- Table 2 shows the largest lattice pattern (ppi) in which the occurrence of glare due to the antiglare hard coat film is not confirmed. The glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition.
- FIG. 3B shows a photograph of an 80 ppi lattice pattern
- FIG. 3C shows a photograph of a 100 ppi lattice pattern
- FIG. 3D shows a photograph of a 140 ppi lattice pattern
- FIG. 3E shows photographs of a 180 ppi lattice pattern.
- the haze value (%) in the obtained antiglare hard coat film was evaluated. That is, the haze value (%) of the obtained antiglare hard coat film was measured based on JIS K 7136 using a haze meter (NDH5000, manufactured by Nippon Denshoku Industries Co., Ltd.). The obtained results are shown in Table 2.
- the scratch resistance of the obtained antiglare hard coat film was evaluated. That is, using a # 0000 steel wool, the anti-glare hard coat layer of the obtained anti-glare hard coat film was subjected to a 10 reciprocating rub test at a load of 250 g / cm 2 and a sliding distance of 10 cm. . Next, the presence or absence of scratches on the antiglare hard coat layer was visually confirmed under a three-wavelength fluorescent lamp, and evaluated according to the following criteria. The obtained results are shown in Table 2. ⁇ : No change is confirmed in the appearance of the antiglare hard coat layer ⁇ : A change is confirmed in the appearance of the antiglare hard coat layer
- Example 2 the antiglare hard coat film was the same as in Example 1 except that the components (A) to (B) and (E) in the antiglare hard coat layer forming composition were changed as follows. Were manufactured and evaluated. The obtained results are shown in Table 2. Moreover, the particle size distribution chart of (B) component used in Example 2 is shown in FIG.4 (b).
- (A1) Component: Urethane Acrylate Prepolymer: 70 parts by weight
- (A2) Component: Multifunctional acrylate: 30 parts by weight
- (B) Component: Crosslinked acrylic-styrene copolymer resin fine particles: 5 parts by weight (Sekisui Plastics Industry ( Co., Ltd., Techpolymer XX16LA, volume average particle size: 2.5 ⁇ m, Cv value: 28%)
- Example 3 an antiglare hard coat film was produced in the same manner as in Example 1, except that the components (A) to (E) in the antiglare hard coat layer forming composition were changed as follows: evaluated. The obtained results are shown in Table 2.
- component Silicone resin fine particles: 5 parts by weight (Momentive Co., Ltd., Tospearl 120, volume average particle size: 2 ⁇ m, Cv value: 20%)
- Example 4 an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (F) was not blended in the antiglare hard coat layer forming composition. The obtained results are shown in Table 2.
- Comparative Example 1 an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2. Further, a particle size distribution chart of the component (B) used in Comparative Example 1 is shown in FIG. (B) Component: Crosslinked acrylic polymer resin fine particles: 10 parts by weight (manufactured by Soken Chemical Co., Ltd., MX-80H3 wt, volume average particle size: 0.8 ⁇ m, Cv value: 10%)
- Comparative Example 2 In Comparative Example 2, an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2.
- resin fine particles having a predetermined volume average particle diameter are predetermined for an antiglare hard coat layer forming composition for forming an antiglare hard coat layer.
- a predetermined dispersant at a predetermined ratio, it has become possible to effectively suppress the occurrence of glare while maintaining excellent antiglare properties.
- an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display is obtained. I was able to do it. Therefore, the antiglare hard coat film of the present invention is expected to contribute significantly to the improvement of visibility in a high-definition display.
- 12 Plastic substrate, 12a, b: TAC film, 13: Antiglare hard coat layer, 14: Antiglare hard coat film, 15a, b: Adhesive layer, 16: Adhesive layer, 17: Release sheet, 20: Polarizing plate
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Abstract
Description
本発明は、防眩性ハードコートフィルムに関する。
特に、優れた防眩性を有するとともに、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制することができる防眩性ハードコートフィルムに関する。
The present invention relates to an antiglare hard coat film.
In particular, the present invention relates to an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
従来、ブラウン管(CRT)や液晶ディスプレイ(LCD)、プラズマディスプレイ(PDP)などのディスプレイにおいては、画面において外部からの入射光(以下、「外光」と称する場合がある。)が反射して、表示画像が視認しにくくなるという問題が見られた。
特に、近年、ディスプレイの大型化に伴い、かかる問題を解決することが、ますます重要な課題となってきている。
Conventionally, in a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), or a plasma display (PDP), incident light from the outside (hereinafter sometimes referred to as “external light”) is reflected on the screen. There was a problem that the display image was difficult to visually recognize.
In particular, in recent years, with the increase in the size of displays, it has become increasingly important to solve such problems.
そこで、かかる外光反射の問題を解決する手段の一つとして、防眩性ハードコート層を有する部材を用いる技術が実施されている。
かかる防眩性ハードコート層の形成手法としては、(1)ハードコート層を形成する際に、物理的手法によりハードコート層の表面を粗面化する方法、(2)ハードコート層形成用のハードコート剤にフィラーを混入する方法、(3)ハードコート層形成用のハードコート剤に非相溶な2成分を混入し、それらの相分離を利用する方法、の3種類に大別することができる。
これらの方法はいずれもハードコート層の表面に微細な凹凸を形成することにより、外光の正反射を抑え、蛍光灯などの外光の写り込みを防止するものであるが、特に(2)のハードコート層にフィラーを混入する方法が主流である(例えば、特許文献1~2参照)。
Therefore, as one means for solving the problem of external light reflection, a technique using a member having an antiglare hard coat layer has been implemented.
As a method of forming such an antiglare hard coat layer, (1) a method of roughening the surface of the hard coat layer by a physical method when forming the hard coat layer, (2) for forming the hard coat layer The method is roughly divided into three types: a method of mixing a filler into a hard coating agent, and a method of (3) mixing two components that are incompatible with the hard coating agent for forming a hard coating layer and utilizing their phase separation. Can do.
In any of these methods, fine irregularities are formed on the surface of the hard coat layer to suppress regular reflection of external light and prevent reflection of external light such as a fluorescent lamp. The mainstream method is to mix a filler into the hard coat layer (see, for example, Patent Documents 1 and 2).
すなわち、特許文献1には、透明プラスチックフィルムの表面に、(A)(a)多官能性(メタ)アクリレート系モノマーおよび/または(メタ)アクリレート系プレポリマーと、(b)反応性シリカ微粒子を含む活性エネルギー線感応型組成物、(B)球状有機微粒子、および(C)分子内に少なくとも一つの極性基を有する分散剤を含有するハードコート層形成材料を用いて形成されたハードコート層を有し、かつ該ハードコート層の厚さが、(B)球状有機微粒子の平均粒径よりも大きいことを特徴とする防眩性ハードコートフィルムが開示されている。
また、(B)球状有機微粒子の平均粒子径としては、6~10μmの範囲内の値とすることが好ましいとされている。
That is, in Patent Document 1, (A) (a) a polyfunctional (meth) acrylate monomer and / or (meth) acrylate prepolymer and (b) reactive silica fine particles are formed on the surface of a transparent plastic film. A hard coat layer formed using a hard coat layer-forming material containing an active energy ray-sensitive composition, (B) spherical organic fine particles, and (C) a dispersant having at least one polar group in the molecule. And an antiglare hard coat film characterized in that the hard coat layer has a thickness larger than the average particle size of (B) spherical organic fine particles.
Further, (B) the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 6 to 10 μm.
また、特許文献2には、透明プラスチックフィルムの表面に、(A)活性エネルギー線感応型組成物、および(B)球状有機微粒子を含有するハードコート層形成材料を用いて形成されたハードコート層を有し、かつ該ハードコート層の全ヘイズ値を20%以下とし、「全ヘイズ値-内部ヘイズ値」の値を-10~+1%の範囲にすることを特徴とする防眩性ハードコートフィルムが開示されている。
また、(B)球状有機微粒子の平均粒子径としては、1~10μmの範囲内の値とすることが好ましいとされている。
Patent Document 2 discloses a hard coat layer formed on the surface of a transparent plastic film using a hard coat layer forming material containing (A) an active energy ray-sensitive composition and (B) spherical organic fine particles. Anti-glare hard coat, wherein the total haze value of the hard coat layer is 20% or less, and the value of “total haze value−internal haze value” is in the range of −10 to + 1%. A film is disclosed.
Further, (B) the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 1 to 10 μm.
しかしながら、特許文献1に開示されている防眩性ハードコートフィルムは、所定の防眩性を得ることはできるものの、球状有機微粒子の平均粒子径が大きいことに起因して、画面におけるギラギラ感(以下、「ギラツキ」と称する場合がある。)が生じやすいという問題が見られた。
特に、解像度の高い高精細ディスプレイに適用した場合には、ギラツキの発生を抑制することが困難になり、画面を視認する際の快適性が低下するという問題が見られた。
However, although the anti-glare hard coat film disclosed in Patent Document 1 can obtain a predetermined anti-glare property, the average particle diameter of the spherical organic fine particles is large, resulting in a glare feeling on the screen ( Hereinafter, there is a problem that it may be referred to as “glare”.
In particular, when applied to a high-definition display with a high resolution, it has become difficult to suppress the occurrence of glare, and there has been a problem that comfort when viewing the screen is reduced.
また、特許文献2に開示されている防眩性ハードコートフィルムは、球状有機微粒子の平均粒子径の数値範囲が十分に考慮されていないばかりか、ハードコート層形成材料に分散剤を配合していないことから、球状有機微粒子の沈降具合を十分に制御することが困難になるという問題が見られた。
その結果、所定の防眩性を安定的に得ることが困難であるばかりか、仮に所定の防眩性を得ることができた場合であっても、球状有機微粒子がハードコート層の表面から過度に脱落しやすくなって、十分な耐擦傷性が得られなくなり、ひいては防眩性も低下しやすくなるという問題が見られた。
Further, the antiglare hard coat film disclosed in Patent Document 2 is not sufficiently considered in the numerical range of the average particle diameter of the spherical organic fine particles, but also contains a dispersant in the hard coat layer forming material. As a result, there was a problem that it was difficult to sufficiently control the sedimentation of the spherical organic fine particles.
As a result, not only is it difficult to stably obtain the predetermined antiglare property, but even if the predetermined antiglare property can be obtained, the spherical organic fine particles are excessively removed from the surface of the hard coat layer. In other words, there was a problem that the film could easily fall off and sufficient scratch resistance could not be obtained, and the antiglare property was likely to be lowered.
そこで、本発明者等は、以上のような事情に鑑み、鋭意努力したところ、防眩性ハードコート層を形成するための防眩性ハードコート層形成用組成物に対し、所定の体積平均粒子径を有する樹脂微粒子を所定の割合で配合するとともに、所定の分散剤を所定の割合で配合することにより、優れた防眩性を維持しつつ、ギラツキの発生についても効果的に抑制できることを見出し、本発明を完成させたものである。
すなわち、本発明の目的は、優れた防眩性を有するとともに、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制することができる防眩性ハードコートフィルムを提供することにある。
Therefore, the present inventors made extensive efforts in view of the circumstances as described above, and with respect to the antiglare hard coat layer forming composition for forming the antiglare hard coat layer, predetermined volume average particles were obtained. It has been found that, by blending resin fine particles having a diameter in a predetermined ratio and blending a predetermined dispersant in a predetermined ratio, the occurrence of glare can be effectively suppressed while maintaining excellent antiglare properties. The present invention has been completed.
That is, an object of the present invention is to provide an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display. There is.
本発明によれば、プラスチック基材の表面に防眩性ハードコート層を備えた防眩性ハードコートフィルムであって、防眩性ハードコート層が、(A)成分としての活性エネルギー線硬化性樹脂と、(B)成分としての樹脂微粒子と、(C)成分としての分散剤と、(D)成分としての光重合開始剤と、を含む防眩性ハードコート層形成用組成物の硬化物からなるとともに、(B)成分としての樹脂微粒子の体積平均粒子径を1~2.5μmの範囲内の値とし、(B)成分としての樹脂微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.1~20重量部の範囲内の値とし、かつ、(C)成分としての分散剤が、分子内に少なくとも1つの極性基を有するとともに、極性基として、カルボキシル基、ヒドロキシル基、スルホ基、1級アミノ基、2級アミノ基、3級アミノ基、アミド基、第4級アンモニウム塩基、ピリジウム塩基、スルホニウム塩基およびホスホニウム塩基からなる群から選択される少なくとも一種を有する化合物であり、(C)成分としての分散剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0~2重量部(但し、0重量部を除く。)の範囲内の値とすることを特徴とする防眩性ハードコートフィルムが提供され、上述した問題を解決することができる。
すなわち、本発明の防眩性ハードコートフィルムであれば、防眩性ハードコート層を形成するための防眩性ハードコート層形成用組成物に対し、比較的小さな体積平均粒子径を有する樹脂微粒子を所定の割合にて配合していることから、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制することができる。
また、所定の分散剤を所定の割合で配合していることからプラスチック基材表面に塗布された防眩性ハードコート層形成用組成物の塗膜における樹脂微粒子の沈降具合を効果的に制御して、防眩性ハードコート層表面の微細な凹凸を安定的に形成し、樹脂微粒子の体積平均粒子径を比較的小さな範囲に限定しているにもかかわらず、優れた防眩性を得ることができる。
したがって、本発明の防眩性ハードコートフィルムであれば、優れた防眩性を有するとともに、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制することができる。
According to the present invention, an anti-glare hard coat film having an anti-glare hard coat layer on the surface of a plastic substrate, wherein the anti-glare hard coat layer is active energy ray curable as the component (A). Cured product of antiglare hard coat layer forming composition comprising resin, resin fine particles as component (B), dispersant as component (C), and photopolymerization initiator as component (D) The volume average particle diameter of the resin fine particles as the component (B) is set to a value within the range of 1 to 2.5 μm, and the blending amount of the resin fine particles as the component (B) is determined as the activity as the component (A). A value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the energy ray curable resin, and the dispersant as the component (C) has at least one polar group in the molecule, As a polar group, a carboxyl group, Compound having at least one selected from the group consisting of droxyl group, sulfo group, primary amino group, secondary amino group, tertiary amino group, amide group, quaternary ammonium base, pyridium base, sulfonium base and phosphonium base The blending amount of the dispersant as the component (C) is 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). An anti-glare hard coat film characterized by having a value within the range is provided, and the above-described problems can be solved.
That is, if it is an anti-glare hard coat film of the present invention, resin fine particles having a relatively small volume average particle diameter relative to the anti-glare hard coat layer forming composition for forming the anti-glare hard coat layer Therefore, even if it is applied to a high-definition display, the occurrence of glare can be effectively suppressed.
In addition, since a predetermined dispersant is blended at a predetermined ratio, the sedimentation state of the resin fine particles in the coating film of the composition for forming an antiglare hard coat layer applied to the surface of the plastic substrate is effectively controlled. The anti-glare hard coat layer surface is stably formed with fine irregularities, and the resin particles have excellent anti-glare properties despite the volume average particle diameter being limited to a relatively small range. Can do.
Therefore, the antiglare hard coat film of the present invention has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
また、本発明の防眩性ハードコートフィルムを構成するにあたり、(B)成分としての樹脂微粒子が、アクリル重合体樹脂微粒子、アクリル-スチレン共重合体樹脂微粒子、スチレン重合体樹脂微粒子およびシリコーン樹脂微粒子からなる群から選択される少なくとも一種であることが好ましい。
このように構成することにより、防眩性ハードコート層の表面に対し、微細な凹凸をより安定的に形成することができる。
Further, in constituting the antiglare hard coat film of the present invention, the resin fine particles as the component (B) are acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles. It is preferably at least one selected from the group consisting of
By comprising in this way, a fine unevenness | corrugation can be more stably formed with respect to the surface of an anti-glare hard-coat layer.
また、本発明の防眩性ハードコートフィルムを構成するにあたり、防眩性ハードコート層形成用組成物が、(E)成分としてのシリカ微粒子を含むとともに、(E)成分としてのシリカ微粒子の体積平均粒子径を2~500nmの範囲内の値とし、かつ、(E)成分としてのシリカ微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、10~200重量部の範囲内の値とすることが好ましい。
このように構成することにより、防眩性ハードコート層形成用組成物をプラスチック基材の表面に塗布した際に、塗膜における(B)成分としての樹脂微粒子の沈降具合をより効果的に制御して、防眩性ハードコート層の表面に対し、微細な凹凸をさらに安定的に形成することができる。
Further, in constituting the antiglare hard coat film of the present invention, the composition for forming an antiglare hard coat layer contains silica fine particles as the component (E), and the volume of the silica fine particles as the component (E). The average particle diameter is set to a value in the range of 2 to 500 nm, and the blending amount of the silica fine particles as the component (E) is 10 to A value within the range of 200 parts by weight is preferred.
By comprising in this way, when the anti-glare hard coat layer forming composition is applied to the surface of the plastic substrate, the sedimentation degree of the resin fine particles as the component (B) in the coating film is controlled more effectively. Thus, fine irregularities can be more stably formed on the surface of the antiglare hard coat layer.
また、本発明の防眩性ハードコートフィルムを構成するにあたり、防眩性ハードコート層形成用組成物が、(F)成分としてのスリップ剤を含むとともに、(F)成分としてのスリップ剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.05~20重量部の範囲内の値とすることが好ましい。
このように構成することにより、防眩性ハードコートフィルムにおける耐擦傷性を向上させることができる。
Further, in constituting the antiglare hard coat film of the present invention, the composition for forming an antiglare hard coat layer contains a slip agent as the component (F), and contains a slip agent as the component (F). The amount is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
By comprising in this way, the abrasion resistance in an anti-glare hard coat film can be improved.
また、本発明の防眩性ハードコートフィルムを構成するにあたり、(F)成分としてのスリップ剤が、シリコーンオイルおよび変性シリコーンオイル、あるいはいずれか一方であることが好ましい。
このように構成することにより、防眩性ハードコートフィルムにおける耐擦傷性をさらに向上させることができる。
Further, in constituting the antiglare hard coat film of the present invention, the slip agent as the component (F) is preferably silicone oil and modified silicone oil or one of them.
By comprising in this way, the abrasion resistance in an anti-glare hard coat film can further be improved.
また、本発明の防眩性ハードコートフィルムを構成するにあたり、防眩性ハードコート層の膜厚を0.5~6μmの範囲内の値とすることが好ましい。
このように構成することにより、実使用上必要な硬度を得るとともに、活性エネルギー線硬化性樹脂の硬化収縮に伴うカールの抑制と、防眩性ハードコートフィルムを曲げた際に生じる防眩性ハードコート層におけるクラックの抑制をすることができる。
In constituting the antiglare hard coat film of the present invention, the film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 μm.
By configuring in this way, the hardness necessary for practical use is obtained, curling due to curing shrinkage of the active energy ray curable resin, and antiglare hard generated when the antiglare hard coat film is bent. Cracks in the coat layer can be suppressed.
本発明の実施形態は、図1(a)に示すように、プラスチック基材12の表面に防眩性ハードコート層13を備えた防眩性ハードコートフィルム14であって、防眩性ハードコート層13が、(A)成分としての活性エネルギー線硬化性樹脂と、(B)成分としての樹脂微粒子と、(C)成分としての分散剤と、(D)成分としての光重合開始剤と、を含む防眩性ハードコート層形成用組成物の硬化物からなるとともに、(B)成分としての樹脂微粒子の体積平均粒子径を1~2.5μmの範囲内の値とし、(B)成分としての樹脂微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.1~20重量部の範囲内の値とし、かつ、(C)成分としての分散剤が、分子内に少なくとも1つの極性基を有するとともに、極性基として、カルボキシル基、ヒドロキシル基、スルホ基、1級アミノ基、2級アミノ基、3級アミノ基、アミド基、第4級アンモニウム塩基、ピリジウム塩基、スルホニウム塩基およびホスホニウム塩基からなる群から選択される少なくとも一種を有する化合物であり、(C)成分としての分散剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0~2重量部(但し、0重量部を除く。)の範囲内の値とすることを特徴とする防眩性ハードコートフィルム14である。
以下、本発明の実施形態を、図面を適宜参照して、具体的に説明する。
An embodiment of the present invention is an antiglare
Embodiments of the present invention will be specifically described below with reference to the drawings as appropriate.
1.防眩性ハードコート層
(1)防眩性ハードコート層形成用組成物
本発明の防眩性ハードコートフィルムにおける防眩性ハードコート層は、(A)成分としての活性エネルギー線硬化性樹脂と、(B)成分としての樹脂微粒子と、(C)成分としての分散剤と、(D)成分としての光重合開始剤と、を含む防眩性ハードコート層形成用組成物の硬化物からなる。
以下、防眩性ハードコート層形成用組成物に含まれる各成分について説明する。
1. Anti-glare hard coat layer (1) Anti-glare hard coat layer forming composition The anti-glare hard coat layer in the anti-glare hard coat film of the present invention comprises an active energy ray-curable resin as component (A) and And a cured product of an antiglare hard coat layer forming composition comprising resin fine particles as component (B), a dispersant as component (C), and a photopolymerization initiator as component (D). .
Hereinafter, each component contained in the composition for forming an antiglare hard coat layer will be described.
(1)-1 (A)成分:活性エネルギー線硬化性樹脂
本発明における防眩性ハードコート層形成用組成物に含まれる(A)成分としての活性エネルギー線硬化性樹脂の種類としては、特に制限されるものではなく、従来公知のものの中から選択することができ、エネルギー線硬化性のモノマー、オリゴマー、樹脂またはこれらの混合物が挙げられる。
より具体的には、多官能性(メタ)アクリル系モノマーや(メタ)アクリレート系プレポリマーを用いることが好ましい。
(1) -1 Component (A): Active energy ray-curable resin As the type of active energy ray-curable resin as the component (A) contained in the composition for forming an antiglare hard coat layer in the present invention, It is not limited, and can be selected from conventionally known ones, and examples include energy ray-curable monomers, oligomers, resins, and mixtures thereof.
More specifically, it is preferable to use a polyfunctional (meth) acrylic monomer or a (meth) acrylate prepolymer.
また、多官能性(メタ)アクリル系モノマーとしては、例えば、1,4-ブタンジオールジ(メタ)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、ポリエチレングリコールジ(メタ)アクリレート、ヒドロキシピバリン酸ネオペンチルグリコールジ(メタ)アクリレート、ジシクロペンタニルジ(メタ)アクリレート、カプロラクトン変性ジシクロペンテニルジ(メタ)アクリレート、エチレンオキシド変性リン酸ジ(メタ)アクリレート、アリル化シクロヘキシルジ(メタ)アクリレート、イソシアヌレートジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、ジペンタエリスリトールトリ(メタ)アクリレート、プロピオン酸変性ジペンタエリスリトールトリ(メタ)アクリレート、ペンタエリスリトールトリ(メタ)アクリレート、プロピレンオキシド変性トリメチロールプロパントリ(メタ)アクリレート、トリス(アクリロキシエチル)イソシアヌレート、プロピオン酸変性ジペンタエリスリトールペンタ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、カプロラクトン変性ジペンタエリスリトールヘキサ(メタ)アクリレートなどの多官能性(メタ)アクリレートが挙げられる。
また、これらのモノマーは1種用いてもよいし、2種以上を組み合わせて用いてもよい。
Examples of the polyfunctional (meth) acrylic monomer include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and polyethylene. Glycol di (meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate phosphate, Allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate , Pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, propionic acid modified dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) Examples thereof include polyfunctional (meth) acrylates such as acrylate and caprolactone-modified dipentaerythritol hexa (meth) acrylate.
Moreover, these monomers may be used 1 type and may be used in combination of 2 or more type.
また、(メタ)アクリレート系プレポリマーとしては、例えば、ポリエステルアクリレート系、エポキシアクリレート系、ウレタンアクリレート系、ポリオールアクリレート系などが挙げられる。
ここで、ポリエステルアクリレート系プレポリマーとしては、例えば、多価カルボン酸と多価アルコールの縮合によって得られる両末端に水酸基を有するポリエステルオリゴマーの水酸基を(メタ)アクリル酸でエステル化することにより、あるいは、多価カルボン酸にアルキレンオキシドを付加して得られるオリゴマーの末端の水酸基を(メタ)アクリル酸でエステル化することにより得ることができる。
また、エポキシアクリレート系プレポリマーは、例えば、比較的低分子量のビスフェノール型エポキシ樹脂やノボラック型エポキシ樹脂のオキシラン環に、(メタ)アクリル酸を反応しエステル化することにより得ることができる。
また、ウレタンアクリレート系プレポリマーは、例えば、ポリエーテルポリオールやポリエステルポリオールとポリイソシアネートの反応によって得られるポリウレタンオリゴマーを、(メタ)アクリル酸でエステル化することにより得ることができる。
さらに、ポリオールアクリレート系プレポリマーは、ポリエーテルポリオールの水酸基を(メタ)アクリル酸でエステル化することにより得ることができる。これらのプレポリマーは1種単独で用いてもよいし、2種以上を組み合わせて用いてもよく、また、上述した多官能性(メタ)アクリレート系モノマーと併用してもよい。
Examples of the (meth) acrylate prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, and polyol acrylate.
Here, as the polyester acrylate-based prepolymer, for example, by esterifying hydroxyl groups of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid, or It can be obtained by esterifying a hydroxyl group at the terminal of an oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid with (meth) acrylic acid.
The epoxy acrylate prepolymer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol-type epoxy resin or novolak-type epoxy resin and esterifying it.
The urethane acrylate prepolymer can be obtained, for example, by esterifying, with (meth) acrylic acid, a polyurethane oligomer obtained by a reaction between polyether polyol or polyester polyol and polyisocyanate.
Furthermore, the polyol acrylate-based prepolymer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid. These prepolymers may be used individually by 1 type, may be used in combination of 2 or more type, and may be used together with the polyfunctional (meth) acrylate type monomer mentioned above.
(1)-2 (B)成分:樹脂微粒子
(i)種類
本発明における防眩性ハードコート層形成用組成物に含まれる(B)成分としての樹脂微粒子の種類としては、例えば、シリコーン樹脂微粒子、変性シリコーン樹脂微粒子、メラミン樹脂微粒子、アクリル重合体樹脂微粒子(例えば、ポリメチルメタクリレート樹脂微粒子等が挙げられる。)、アクリル-スチレン共重合体樹脂微粒子、ポリカーボネート樹脂微粒子、ポリエチレン樹脂微粒子、スチレン重合体樹脂微粒子、ベンゾグアナミン樹脂微粒子などが挙げられる。
中でも、アクリル重合体樹脂微粒子、アクリル-スチレン共重合体樹脂微粒子、スチレン重合体樹脂微粒子およびシリコーン樹脂微粒子からなる群から選択される少なくとも一種であることが好ましい。
この理由は、これらの樹脂微粒子であれば、防眩性ハードコート層の表面に対し、微細な凹凸を安定的に形成することができるためである。
なお、光の散乱状態を均質化して、防眩性を安定化させる観点から、樹脂微粒子の形状を球状とすることが好ましい。
(1) -2 Component (B): Resin Fine Particle (i) Type As the type of resin fine particle as component (B) contained in the composition for forming an antiglare hard coat layer in the present invention, for example, silicone resin fine particles , Modified silicone resin fine particles, melamine resin fine particles, acrylic polymer resin fine particles (for example, polymethyl methacrylate resin fine particles, etc.), acrylic-styrene copolymer resin fine particles, polycarbonate resin fine particles, polyethylene resin fine particles, styrene polymer Examples thereof include resin fine particles and benzoguanamine resin fine particles.
Among these, at least one selected from the group consisting of acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles is preferable.
This is because these resin fine particles can stably form fine irregularities on the surface of the antiglare hard coat layer.
From the viewpoint of homogenizing the light scattering state and stabilizing the antiglare property, it is preferable that the resin fine particles have a spherical shape.
(ii)体積平均粒子径
また、本発明においては、樹脂微粒子の体積平均粒子径を1~2.5μmの範囲内の値とすることを特徴とする。
この理由は、樹脂微粒子の体積平均粒子径をかかる範囲内の値とすることにより、優れた防眩性を維持しつつ、ギラツキの発生についても効果的に抑制することができるためである。
すなわち、樹脂微粒子の体積平均粒子径が1μm未満の値となると、十分な防眩性を維持することが困難になる場合があるためである。一方、樹脂微粒子の体積平均粒子径が2.5μmを超えた値となると、特に高精細ディスプレイに適用した場合に、ギラツキの発生を効果的に抑制することが困難になる場合があるためである。
したがって、樹脂微粒子の体積平均粒子径を1.2~2.3μmの範囲内の値とすることがより好ましく、1.3~2μmの範囲内の値とすることがさらに好ましい。
なお、樹脂微粒子の体積平均粒子径は、レーザー回折散乱式粒度分布測定装置を用いて測定することができる。
(Ii) Volume average particle diameter In the present invention, the volume average particle diameter of the resin fine particles is set to a value within the range of 1 to 2.5 μm.
This is because the occurrence of glare can be effectively suppressed while maintaining excellent anti-glare properties by setting the volume average particle diameter of the resin fine particles to a value within this range.
That is, when the volume average particle diameter of the resin fine particles is less than 1 μm, it may be difficult to maintain sufficient antiglare properties. On the other hand, when the volume average particle diameter of the resin fine particles exceeds 2.5 μm, it may be difficult to effectively suppress the occurrence of glare particularly when applied to a high-definition display. .
Accordingly, the volume average particle diameter of the resin fine particles is more preferably set to a value within the range of 1.2 to 2.3 μm, and further preferably set to a value within the range of 1.3 to 2 μm.
The volume average particle diameter of the resin fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
次いで、図2を用いて、樹脂微粒子の体積平均粒子径と、防眩性ハードコートフィルムにおけるギラツキおよび防眩性と、の関係を説明する。
すなわち、図2には、横軸に樹脂微粒子の体積平均粒子径(μm)を採り、左縦軸に防眩性ハードコートフィルムにおけるギラツキ(ppi)を採った特性曲線A、および右縦軸に防眩性ハードコートフィルムにおける60°鏡面光沢度(%)を採った特性曲線Bを示す。
また、防眩性ハードコートフィルムにおけるギラツキ(ppi)、および60°鏡面光沢度(%)の具体的な測定方法については、実施例において記載する。
なお、ギラツキの値(ppi)が大きいほどギラツキの発生を効果的に抑制できていることを意味する。
Next, the relationship between the volume average particle diameter of the resin fine particles and the glare and antiglare property of the antiglare hard coat film will be described with reference to FIG.
That is, in FIG. 2, the horizontal axis represents the volume average particle diameter (μm) of the resin fine particles, the left vertical axis represents the glare (ppi) in the antiglare hard coat film, and the right vertical axis represents The characteristic curve B which took 60 degree specular glossiness (%) in an anti-glare hard coat film is shown.
In addition, specific methods for measuring glare (ppi) and 60 ° specular gloss (%) in an antiglare hard coat film are described in Examples.
In addition, it means that generation | occurrence | production of glare can be suppressed effectively, so that the value (ppi) of glare is large.
まず、特性曲線Aから理解されるように、ギラツキの値は、樹脂微粒子の体積平均粒子径が大きくなるのに伴って、減少する傾向がある。
ここで、280ppi以上の実際の高精細ディスプレイに適用した場合に、ギラツキの発生を安定的に抑制するためには、特性曲線Aにおけるギラツキの値を80ppiを超えた値にすればよいことが確認されている。
したがって、ギラツキの値を80ppiを超えた値とし、ギラツキを効果的に抑制するためには、樹脂微粒子の体積平均粒子径を2.5μm以下の値とすべきことが理解される。
First, as understood from the characteristic curve A, the glare value tends to decrease as the volume average particle diameter of the resin fine particles increases.
Here, when applied to an actual high-definition display of 280 ppi or more, it is confirmed that the glare value in the characteristic curve A should be set to a value exceeding 80 ppi in order to stably suppress the occurrence of glare. Has been.
Therefore, it is understood that the volume average particle diameter of the resin fine particles should be 2.5 μm or less in order to set the glare value to a value exceeding 80 ppi and effectively suppress the glare.
次に、特性曲線Bから理解されるように、60°鏡面光沢度も、樹脂微粒子の体積平均粒子径が大きくなるのに伴って、減少する傾向がある。
ここで、実際のディスプレイに適用した場合に、所定の防眩性を安定的に得るためには、60°鏡面光沢度を120%以下の値にする必要がある。
したがって、60°鏡面光沢度を120%以下の値とし、所定の防眩性を安定的に得るためには、樹脂微粒子の体積平均粒子径を1μm以上の値とすべきことが理解される。
以上、説明したように、特性曲線AおよびBからは、ギラツキの発生を効果的に抑制し、かつ、所定の防眩性を得るためには、樹脂微粒子の体積平均粒子径を1~2.5μmの範囲内の値とすべきことが理解される。
Next, as understood from the characteristic curve B, the 60 ° specular gloss also tends to decrease as the volume average particle diameter of the resin fine particles increases.
Here, in order to stably obtain a predetermined antiglare property when applied to an actual display, it is necessary to set the 60 ° specular glossiness to a value of 120% or less.
Therefore, it is understood that the volume average particle diameter of the resin fine particles should be a value of 1 μm or more in order to set the 60 ° specular gloss to a value of 120% or less and stably obtain a predetermined antiglare property.
As described above, from the characteristic curves A and B, in order to effectively suppress the occurrence of glare and to obtain a predetermined antiglare property, the volume average particle diameter of the resin fine particles is set to 1-2. It is understood that the value should be in the range of 5 μm.
また、樹脂微粒子のCv値を50%以下の値とすることが好ましい。
この理由は、かかるCv値が50%を超えた値となると、体積平均粒子径よりも大きいまたは小さい粒径の粒子の存在量が増加し、大きい粒径の存在量が増加した場合にはギラツキの発生を抑制することが困難になり、小さい粒径の存在量が増加した場合には所望の防眩性を得ることが困難になる場合があるためである。
したがって、樹脂微粒子のCv値を40%以下の値とすることがより好ましく、30%以下の値とすることがさらに好ましい。
なお、Cv値とは、下記式(1)で表される粒子径分布の変動係数を意味する。
Cv値(%)=(標準偏差粒子径/体積平均粒子径)×100 (1)
また、かかるCv値は、レーザー回折散乱式粒度分布測定装置を用いて測定することができる。
The Cv value of the resin fine particles is preferably set to a value of 50% or less.
The reason for this is that when the Cv value exceeds 50%, the abundance of particles having a particle size larger or smaller than the volume average particle size increases, and if the abundance of a large particle size increases, glare occurs. This is because it may be difficult to suppress the occurrence of the occurrence of an antiglare, and it may be difficult to obtain a desired antiglare property when the amount of small particle size increases.
Therefore, the Cv value of the resin fine particles is more preferably 40% or less, and further preferably 30% or less.
In addition, Cv value means the variation coefficient of the particle size distribution represented by following formula (1).
Cv value (%) = (standard deviation particle diameter / volume average particle diameter) × 100 (1)
The Cv value can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
(iii)配合量
また、樹脂微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.1~20重量部の範囲内の値とすることを特徴とする。
この理由は、防眩性ハードコート層の表面に微細な凹凸を形成させて、優れた防眩性を得るためである。
すなわち、樹脂微粒子の配合量が0.1重量部未満の値となると、防眩性ハードコート層の表面に微細な凹凸を十分に形成することができず、所望の防眩性を得ることが困難となる場合があるためである。一方、樹脂微粒子の配合量が20重量部を超えた値となると、ヘイズ値が過度に大きくなって、ディスプレイの表示画像の視認性が低下する場合があるためである。
したがって、樹脂微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、1~15重量部の範囲内の値とすることがより好ましく、3~12重量部の範囲内の値とすることがさらに好ましい。
(Iii) Blending amount The blending amount of the resin fine particles is set to a value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). And
This is because fine irregularities are formed on the surface of the antiglare hard coat layer to obtain excellent antiglare properties.
That is, when the amount of the resin fine particles is less than 0.1 parts by weight, fine irregularities cannot be sufficiently formed on the surface of the antiglare hard coat layer, and a desired antiglare property can be obtained. This is because it may be difficult. On the other hand, when the amount of the resin fine particles exceeds 20 parts by weight, the haze value becomes excessively large, and the visibility of the display image on the display may be lowered.
Therefore, the amount of the resin fine particles is more preferably set to a value within the range of 1 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is more preferable to set the value within the range.
(1)-3 (C)成分:分散剤
本発明における防眩性ハードコート層形成用組成物は、(C)成分としての分散剤を含むことを特徴とする。
この理由は、分散剤を含むことにより、防眩性ハードコート層形成用組成物をプラスチック基材の表面に塗布した際に、塗膜における(B)成分としての樹脂微粒子の沈降具合を効果的に制御して、防眩性ハードコート層表面の微細な凹凸を安定的に形成し、樹脂微粒子の体積平均粒子径を比較的小さな範囲に限定しているにも関わらず、優れた防眩性を得ることができるためである。
すなわち、防眩性ハードコート層の表面側に樹脂微粒子を好適な範囲で偏在させ、防眩性ハードコート層表面の微細な凹凸を安定的に形成することができ、ひいては優れた防眩性を得ることができる。
(1) -3 Component (C): Dispersant The composition for forming an antiglare hard coat layer in the present invention is characterized by containing a dispersant as the component (C).
The reason for this is that when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is effectively settled by including a dispersant. The anti-glare hard coat layer surface is stably controlled to form fine irregularities, and the anti-glare property is excellent even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. It is because it can be obtained.
That is, resin fine particles are unevenly distributed in a suitable range on the surface side of the antiglare hard coat layer, and fine irregularities on the surface of the antiglare hard coat layer can be stably formed. Obtainable.
(i)種類
本発明における防眩性ハードコート層形成用組成物に含まれる(C)成分としての分散剤は、分子内に少なくとも1つの極性基を有するとともに、極性基として、カルボキシル基、ヒドロキシル基、スルホ基、1級アミノ基、2級アミノ基、3級アミノ基、アミド基、第4級アンモニウム塩基、ピリジウム塩基、スルホニウム塩基およびホスホニウム塩基を有する化合物であることを特徴とする。
この理由は、これらの極性基を有する分散剤であれば、プラスチック基材表面に塗布された防眩性ハードコート層形成用組成物の塗膜における樹脂微粒子の沈降具合を効果的に制御することができるためである。
かかる分散剤のメカニズムは、明確には解明されていないが、分散剤中の極性基が、樹脂微粒子の表面に配位し、その結果、樹脂微粒子の表面の極性が変化し、樹脂微粒子が塗膜の表面近傍に存在する確率が高くなるものと推定される。
(I) Type The dispersant as the component (C) contained in the composition for forming an antiglare hard coat layer in the present invention has at least one polar group in the molecule, and includes a carboxyl group, a hydroxyl group as the polar group. It is a compound having a group, a sulfo group, a primary amino group, a secondary amino group, a tertiary amino group, an amide group, a quaternary ammonium base, a pyridium base, a sulfonium base and a phosphonium base.
The reason for this is that if it is a dispersant having these polar groups, it effectively controls the sedimentation of resin fine particles in the coating film of the antiglare hard coat layer-forming composition applied to the surface of the plastic substrate. It is because it can do.
Although the mechanism of such a dispersant has not been clearly clarified, the polar group in the dispersant is coordinated to the surface of the resin fine particles, and as a result, the polarity of the surface of the resin fine particles changes, and the resin fine particles are coated. It is presumed that the probability of being present near the surface of the film increases.
また、上述した極性基の中でも、カルボキシル基、スルホ基、1~3級アミノ基が特に好ましい。
この理由は、これらの極性基であれば、樹脂微粒子の表面に対して、分散剤をより効果的に配位させることができるためである。
また、上述した極性基は、分子内に1つ導入されていてもよく、複数導入されていてもよい。
また、分子内に複数の極性基を有する場合、それぞれの極性基を有する有機化合物同士を結合する基本骨格が必要となるが、そのような基本骨格としては、エステル連鎖、ビニル連鎖、アクリル連鎖、エーテル連鎖およびウレタン連鎖等で構成されるものが好ましい。
また、これらの分子中の水素原子の一部がハロゲン原子で置換されていてもよい。
また、これらの中でもアクリル樹脂、ウレタン樹脂、ポリエステル樹脂およびアルキド樹脂が好ましく、特にアクリル樹脂、ウレタン樹脂、ポリエステル樹脂が好ましい。
Among the polar groups described above, a carboxyl group, a sulfo group, and a primary to tertiary amino group are particularly preferable.
This is because these polar groups can more effectively coordinate the dispersant to the surface of the resin fine particles.
In addition, one or more of the polar groups described above may be introduced into the molecule.
In addition, when having a plurality of polar groups in the molecule, a basic skeleton for bonding organic compounds having each polar group is required. As such a basic skeleton, an ester chain, a vinyl chain, an acrylic chain, Those composed of an ether chain and a urethane chain are preferred.
Moreover, a part of hydrogen atoms in these molecules may be substituted with a halogen atom.
Of these, acrylic resins, urethane resins, polyester resins and alkyd resins are preferred, and acrylic resins, urethane resins and polyester resins are particularly preferred.
また、上述した極性基は、樹脂の分子中に全くランダムに配置されていてもよいが、ブロック構造、またはグラフト構造により、極性基が分子中の末端部分に配置されているものが好ましい。
この理由は、極性基が末端部分に配置されることにより、樹脂微粒子への吸着性能が高くなるためである。
また、分散剤の分子量は特に限定されないが、100~90万までの幅広いものの中から選択することができる。
なお、分散剤は、1種単独で用いてもよく、2種以上を組み合わせて用いてもよい。
Moreover, although the polar group mentioned above may be arrange | positioned at random in the molecule | numerator of resin, what has the polar group arrange | positioned at the terminal part in a molecule | numerator by a block structure or a graft structure is preferable.
This is because the adsorption performance to the resin fine particles is enhanced by the polar group being arranged at the terminal portion.
The molecular weight of the dispersant is not particularly limited, but can be selected from a wide range of from 100 to 900,000.
In addition, a dispersing agent may be used individually by 1 type, and may be used in combination of 2 or more type.
(ii)配合量
また、分散剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0~2重量部(但し、0重量部を除く。)の範囲内の値とすることを特徴とする。
この理由は、樹脂微粒子を防眩性ハードコート層の表面において好適な範囲で偏在させることができるためである。
すなわち、分散剤の配合量が0重量部となると、樹脂微粒子を防眩性ハードコート層の表面において好適な範囲で偏在させることができず、所望の防眩性を得ることが困難となる場合があるためである。一方、分散剤の配合量が2重量部を超えた値となると、耐擦傷性が低下する場合があるためである。
したがって、分散剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.01~1重量部の範囲内の値とすることがより好ましく、0.03~0.5重量部の範囲内の値とすることがさらに好ましい。
(Ii) Blending amount The blending amount of the dispersant is in the range of 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is characterized by being a value within.
This is because the resin fine particles can be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer.
That is, when the blending amount of the dispersant is 0 part by weight, the resin fine particles cannot be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer, and it becomes difficult to obtain a desired antiglare property. Because there is. On the other hand, if the blending amount of the dispersant exceeds 2 parts by weight, the scratch resistance may decrease.
Therefore, the blending amount of the dispersant is more preferably set to a value within the range of 0.01 to 1 part by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 0.5 parts by weight.
(1)-4 (E)成分:シリカ微粒子
本発明における防眩性ハードコート層形成用組成物は、(E)成分としてのシリカ微粒子を含むことが好ましい。
この理由は、防眩性ハードコート層形成用組成物をプラスチック基材の表面に塗布した際に、塗膜における(B)成分としての樹脂微粒子の沈降具合をより効果的に制御して、防眩性ハードコート層の表面に対し、微細な凹凸をより安定的に形成することができるためである。
すなわち、樹脂微粒子との比重差を利用して、防眩性ハードコート層の表面側に樹脂微粒子をより好適な範囲で偏在させ、防眩性ハードコート層表面の微細な凹凸をより安定的に形成することができ、ひいては優れた防眩性を得ることができる。
(1) -4 Component (E): Silica Fine Particle The composition for forming an antiglare hard coat layer in the present invention preferably contains silica fine particles as the component (E).
This is because when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is more effectively controlled to prevent This is because fine irregularities can be more stably formed on the surface of the dazzling hard coat layer.
That is, by utilizing the difference in specific gravity with the resin fine particles, the resin fine particles are unevenly distributed on the surface side of the antiglare hard coat layer in a more suitable range, and the fine irregularities on the surface of the antiglare hard coat layer are more stable. Thus, excellent antiglare properties can be obtained.
(i)種類
また、シリカ微粒子の種類としては、コロイド状シリカ微粒子や、表面官能基を有するシリカ微粒子を用いることが好ましい。
また、表面官能基を有するシリカ微粒子としては、例えば、表面官能基として(メタ)アクリロイル基を含む基を有するシリカ微粒子(以下、反応性シリカ微粒子と称する場合がある。)を挙げることができる。
かかる反応性シリカ微粒子は、例えば、シリカ微粒子の表面のシラノール基に、該シラノール基と反応し得る官能基を有する重合性不飽和基含有有機物を反応させることにより得ることができる。
また、重合性不飽和基としては、例えば、ラジカル重合性の(メタ)アクリロイル基等が挙げられる。
また、シラノール基と反応し得る官能基を有する重合性不飽和基含有有機化合物としては、例えば、アクリル酸、アクリル酸クロリド、アクリル酸2-イソシアナートエチル、アクリル酸グリシジル、アクリル酸2,3-イミノプロピル、アクリル酸2-ヒドロキシエチル、アクリロイルオキシプロピルトリメトキシシラン等、およびこれらのアクリル酸誘導体に対応するメタクリル酸誘導体を好ましく用いることができる。
なお、これらのアクリル酸誘導体やメタクリル酸誘導体は1種単独で用いてもよいし、2種以上を組み合わせて用いてもよい。
(I) Kind As the kind of silica fine particles, it is preferable to use colloidal silica fine particles or silica fine particles having a surface functional group.
Examples of the silica fine particles having a surface functional group include silica fine particles having a group containing a (meth) acryloyl group as the surface functional group (hereinafter sometimes referred to as reactive silica fine particles).
Such reactive silica fine particles can be obtained, for example, by reacting a silanol group on the surface of the silica fine particles with a polymerizable unsaturated group-containing organic substance having a functional group capable of reacting with the silanol group.
Examples of the polymerizable unsaturated group include a radical polymerizable (meth) acryloyl group.
Examples of the polymerizable unsaturated group-containing organic compound having a functional group capable of reacting with a silanol group include acrylic acid, acrylic acid chloride, 2-isocyanatoethyl acrylate, glycidyl acrylate, and 2,3-acrylic acid. Iminopropyl, 2-hydroxyethyl acrylate, acryloyloxypropyltrimethoxysilane, and the like, and methacrylic acid derivatives corresponding to these acrylic acid derivatives can be preferably used.
In addition, these acrylic acid derivatives and methacrylic acid derivatives may be used individually by 1 type, and may be used in combination of 2 or more type.
(ii)体積平均粒子径
また、シリカ微粒子の体積平均粒子径を2~500nmの範囲内の値とすることが好ましい。
この理由は、シリカ微粒子の体積平均粒子径が2nm未満の値となると、シリカ微粒子の分散安定性が低下する場合があるためである。一方、シリカ微粒子の体積平均粒子径が500nmを超えた値となると、シリカ微粒子に起因してヘイズ値が過度に増加する場合があるためである。
したがって、シリカ微粒子の体積平均粒子径を4~300nmの範囲内の値とすることがより好ましく、6~50nmの範囲内の値とすることがさらに好ましい。
なお、シリカ微粒子の体積平均粒子径は、レーザー回折散乱式粒度分布測定装置を用いて測定することができる。
(Ii) Volume average particle size The volume average particle size of the silica fine particles is preferably set to a value in the range of 2 to 500 nm.
This is because when the volume average particle diameter of the silica fine particles is less than 2 nm, the dispersion stability of the silica fine particles may decrease. On the other hand, when the volume average particle diameter of the silica fine particles exceeds 500 nm, the haze value may excessively increase due to the silica fine particles.
Accordingly, the volume average particle diameter of the silica fine particles is more preferably set to a value within the range of 4 to 300 nm, and further preferably set to a value within the range of 6 to 50 nm.
The volume average particle diameter of the silica fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
(iii)配合量
また、シリカ微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、10~200重量部の範囲内の値とすることが好ましい。
この理由は、シリカ微粒子の配合量が10重量部未満の値となると、樹脂微粒子を防眩性ハードコート層の表面において好適は範囲で偏在させることが困難になる場合があるためである。一方、シリカ微粒子の配合量が200重量部を超えた値となると、活性エネルギー線硬化性樹脂の配合割合が減ることで、耐擦傷性が低下する場合があるためである。
したがって、シリカ微粒子の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、12~175重量部の範囲内の値とすることがより好ましく、15~150重量部の範囲内の値とすることがさらに好ましい。
(Iii) Blending amount The blending amount of the silica fine particles is preferably set to a value within the range of 10 to 200 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
The reason for this is that if the amount of silica fine particles is less than 10 parts by weight, it may be difficult to make the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer. On the other hand, when the blending amount of the silica fine particles exceeds 200 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin.
Accordingly, the blending amount of the silica fine particles is more preferably 12 to 175 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A), preferably 15 to 150 parts by weight. It is more preferable to set the value within the range.
(1)-5 (D)成分:光重合開始剤
(i)種類
本発明における防眩性ハードコート層形成用組成物に含まれる(D)成分としての光重合開始剤の種類としては、例えば、ベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテル、ベンゾイン-n-ブチルエーテル、ベンゾインイソブチルエーテル、アセトフェノン、ジメチルアミノアセトフェノン、2,2-ジメトキシ-2-フェニルアセトフェノン、2,2-ジエトキシ-2-フェニルアセトフェノン、2-ヒドロキシ-2-メチル-1-フェニルプロパン-1-オン、1-ヒドロキシシクロヘキシルフェニルケトン、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノ-プロパン-1-オン、4-(2-ヒドロキシエトキシ)フェニル-2(ヒドロキシ-2-プロピル)ケトン、ベンゾフェノン、p-フェニルベンゾフェノン、4,4’-ジエチルアミノベンゾフェノン、ジクロロベンゾフェノン、2-メチルアントラキノン、2-エチルアントラキノン、2-ターシャリーブチルアントラキノン、2-アミノアントラキノン、2-メチルチオキサントン、2-エチルチオキサントン、2-クロロチオキサントン、2,4-ジメチルチオキサントン、2,4-ジエチルチオキサントン、ベンジルジメチルケタール、アセトフェノンジメチルケタール、p-ジメチルアミノ安息香酸エステル等が挙げられる。
なお、これらは1種単独で用いてもよいし、2種以上を組み合わせて用いてもよい。
(1) -5 (D) Component: Photopolymerization Initiator (i) Type As the type of the photopolymerization initiator as the (D) component contained in the antiglare hard coat layer forming composition in the present invention, for example, , Benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2- Phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1- ON, 4- (2-hydroxy Toxi) phenyl-2 (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tertiarybutylanthraquinone, 2 -Aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethyl ketal, acetophenone dimethyl ketal, p-dimethylaminobenzoate, etc. Can be mentioned.
In addition, these may be used individually by 1 type and may be used in combination of 2 or more type.
(ii)配合量
また、光重合開始剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.2~10重量部の範囲内の値とすることが好ましい。
この理由は、光重合開始剤の配合量が0.2重量部未満の値となると、十分な硬化性を得ることが困難となる場合があるためである。一方、光重合開始剤の配合量が10重量部を超えた値となると、耐擦傷性が低下する場合があるためである。
したがって、光重合開始剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.5~7重量部の範囲内の値とすることがより好ましく、1~5重量部の範囲内の値とすることがさらに好ましい。
(Ii) Blending amount The blending amount of the photopolymerization initiator should be a value within the range of 0.2 to 10 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). Is preferred.
This is because it may be difficult to obtain sufficient curability when the blending amount of the photopolymerization initiator is less than 0.2 parts by weight. On the other hand, when the blending amount of the photopolymerization initiator exceeds 10 parts by weight, the scratch resistance may be lowered.
Accordingly, the blending amount of the photopolymerization initiator is more preferably set to a value within the range of 0.5 to 7 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 5 parts by weight.
(1)-6 (F)成分:スリップ剤
また、本発明における防眩性ハードコート層形成用組成物は、(F)成分としてのスリップ剤を含むことが好ましい。
この理由は、スリップ剤を含むことにより、防眩性ハードコートフィルムにおける耐擦傷性を向上させることができるためである。
すなわち、本発明においては、(B)成分としての樹脂微粒子の体積平均粒子径を比較的小さな範囲に限定していることから、防眩性ハードコート層の表面に偏在した樹脂微粒子が摩擦等により脱落しやすくなる場合がある。
この点、スリップ剤により防眩性ハードコート層表面のスリップ性を向上させることにより、樹脂微粒子の体積平均粒子径が比較的小さな範囲に限定されているにもかかわらず、所定の耐擦傷性を得ることができる。
(1) -6 (F) Component: Slip Agent The antiglare hard coat layer forming composition in the present invention preferably contains a slip agent as the component (F).
This is because the scratch resistance of the antiglare hard coat film can be improved by including a slip agent.
That is, in the present invention, since the volume average particle diameter of the resin fine particles as the component (B) is limited to a relatively small range, the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer are caused by friction or the like. It may be easy to drop off.
In this regard, by improving the slip property of the antiglare hard coat layer surface by the slip agent, the predetermined fine scratch resistance can be obtained even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. Obtainable.
(i)種類
また、スリップ剤の種類としては、シリコーンオイルおよび変性シリコーンオイル、あるいはいずれか一方であることが好ましい。
この理由は、これらのスリップ剤であれば、防眩性ハードコート層形成用組成物における他の成分との相溶性にも優れており、防眩性ハードコートフィルムにおける耐擦傷性をさらに向上させることができるためである。
より具体的には、シリコーン変性ウレタンアクリレートおよびウレタンアクリレートの混合物、ポリジメチルシロキサン、変性ポリジメチルシロキサン等が挙げられる。
(I) Type The type of slip agent is preferably silicone oil and modified silicone oil or one of them.
This is because these slip agents are excellent in compatibility with other components in the antiglare hard coat layer forming composition, and further improve the scratch resistance in the antiglare hard coat film. Because it can.
More specifically, silicone-modified urethane acrylate and a mixture of urethane acrylate, polydimethylsiloxane, modified polydimethylsiloxane and the like can be mentioned.
(ii)配合量
また、スリップ剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.05~20重量部の範囲内の値とすることが好ましい。
この理由は、スリップ剤の配合量が0.05重量部未満の値となると、十分なスリップ性が得られず、ひいては十分な耐擦傷性を得ることが困難となる場合があるためである。一方、スリップ剤の配合量が20重量部を超えた値となると、活性エネルギー線硬化性樹脂の配合割合が減ることにより耐擦傷性が低下する場合があるためである。
したがって、スリップ剤の配合量を、(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.5~15重量部の範囲内の値とすることがより好ましく、1~10重量部の範囲内の値とすることがさらに好ましい。
(Ii) Blending amount The blending amount of the slip agent is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). .
This is because when the blending amount of the slip agent is less than 0.05 parts by weight, sufficient slip properties cannot be obtained, and it may be difficult to obtain sufficient scratch resistance. On the other hand, when the blending amount of the slip agent exceeds 20 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin.
Therefore, the blending amount of the slip agent is more preferably 0.5 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of parts by weight.
(1)-7 防眩性ハードコート層形成用組成物の調製
本発明で用いる防眩性ハードコート層形成用組成物は、必要に応じ、適当な溶媒中に、上述した必須成分としての(A)~(D)成分、および任意成分としての(E)~(F)成分を加え、溶解または分散させることにより調製することができる。
このとき、(A)~(F)成分の他にも、例えば、酸化防止剤、紫外線吸収剤、シラン系カップリング剤、光安定剤、レベリング剤、消泡剤等を加えることもできる。
また、使用する溶媒としては、例えば、ヘキサン、ヘプタン等の脂肪族炭化水素、トルエン、キシレン等の芳香族炭化水素、塩化メチレン、塩化エチレン等のハロゲン化炭化水素、メタノール、エタノール、プロパノール、ブタノール等のアルコール、アセトン、メチルエチルケトン、2-ペンタノン、イソホロン、シクロヘキサノン等のケトン、酢酸エチル、酢酸ブチル等のエステル、エチルセロソルブ等のセロソルブ系溶剤等が挙げられる。
なお、このようにして調製された防眩性ハードコート層形成用組成物の濃度および粘度としては、プラスチック基材の表面にコーティング可能な数値範囲であればよく、状況に応じて適宜選定することができる。
(1) -7 Preparation of composition for forming antiglare hard coat layer The composition for forming an antiglare hard coat layer used in the present invention may be used as an essential component described above in an appropriate solvent, if necessary. It can be prepared by adding the components A) to (D) and the optional components (E) to (F) and dissolving or dispersing them.
At this time, in addition to the components (A) to (F), for example, an antioxidant, an ultraviolet absorber, a silane coupling agent, a light stabilizer, a leveling agent, an antifoaming agent and the like can be added.
Examples of the solvent used include aliphatic hydrocarbons such as hexane and heptane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as methylene chloride and ethylene chloride, methanol, ethanol, propanol, and butanol. Alcohols, acetone, methyl ethyl ketone, ketones such as 2-pentanone, isophorone and cyclohexanone, esters such as ethyl acetate and butyl acetate, cellosolve solvents such as ethyl cellosolve and the like.
The concentration and viscosity of the antiglare hard coat layer forming composition thus prepared may be in a numerical range that can be coated on the surface of the plastic substrate, and should be appropriately selected according to the situation. Can do.
(2)膜厚
また、防眩性ハードコート層の膜厚を0.5~6μmの範囲内の値とすることが好ましい。
この理由は、防眩性ハードコート層の膜厚が0.5μm未満の値となると、鉛筆硬度において実使用上必要な硬度を得ることが困難となる場合があるためである。一方、防眩性ハードコート層の膜厚が6μmを超えた値となると、活性エネルギー線硬化性樹脂の硬化収縮に伴うカールの抑制と、防眩性ハードコートフィルムを曲げた際に生じる防眩性ハードコート層におけるクラックの抑制をすることが困難になる場合があるためである。
したがって、防眩性ハードコート層の膜厚を1~6μmの範囲内の値とすることがより好ましく、2~5μmの範囲内の値とすることがさらに好ましい。
(2) Film thickness The film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 μm.
This is because when the film thickness of the antiglare hard coat layer is less than 0.5 μm, it may be difficult to obtain the hardness required for actual use in pencil hardness. On the other hand, when the film thickness of the antiglare hard coat layer exceeds 6 μm, curling due to the curing shrinkage of the active energy ray curable resin and antiglare generated when the antiglare hard coat film is bent. This is because it may be difficult to suppress cracks in the conductive hard coat layer.
Therefore, the film thickness of the antiglare hard coat layer is more preferably set to a value within the range of 1 to 6 μm, and further preferably set to a value within the range of 2 to 5 μm.
2.プラスチック基材
本発明におけるプラスチック基材の種類としては、従来光学用ハードコートフィルムの基材として公知のプラスチック基材の中から適宜選択して用いることができ、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート等のポリエステルフィルム、ポリエチレンフィルム、ポリプロピレンフィルム、セロファン、ジアセチルセルロース、トリアセチルセルロース、アセチルセルロースブチレート、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリビニルアルコール、エチレン-酢酸ビニル共重合体、ポリスチレン、ポリカーボネート、ポリメチルペンテン、ポリスルホン、ポリエーテルエーテルケトン、ポリエーテルスルホン、ポリエーテルイミド、ポリイミド、フッ素樹脂、ポリアミド、アクリル樹脂、ノルボルネン系樹脂、シクロオレフィン樹脂等が挙げられる。
なお、プラスチック基材の膜厚を15~300μmの範囲内の値とすることが好ましく、30~200μmの範囲内の値とすることがより好ましい。
2. Plastic substrate As the type of plastic substrate in the present invention, it can be appropriately selected from known plastic substrates as a substrate for conventional optical hard coat films, such as polyethylene terephthalate, polybutylene terephthalate, Polyester film such as polyethylene naphthalate, polyethylene film, polypropylene film, cellophane, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, polystyrene, polycarbonate , Polymethylpentene, polysulfone, polyether ether ketone, polyether sulfone, polyether imide, polyimide, fluororesin, poly Examples include imide, acrylic resin, norbornene resin, and cycloolefin resin.
The film thickness of the plastic substrate is preferably set to a value in the range of 15 to 300 μm, and more preferably set to a value in the range of 30 to 200 μm.
また、例えば、図1(b)に示すように、本発明の防眩性ハードコートフィルムを偏光子に貼合して偏光板20とすることもできる。
すなわち、プラスチック基材としてトリアセチルセルロース(TAC)フィルムのような光学異方性のないフィルム12aを用い、その一方の面に防眩性ハードコート層13を形成し、防眩性ハードコートフィルム14とする。
次いで、ポリビニルアルコール系偏光子11の片面に防眩性ハードコート層13が形成されたTACフィルム12aを、接着剤層15aを介して積層し、ポリビニルアルコール系偏光子の反対面に防眩性ハードコート層13が形成されていないTACフィルム12bを、接着剤層15bを介して積層する。
これにより、優れた防眩性を有するとともに、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制できる偏光板20が得られる。
なお、偏光板20には、液晶セル等の光学部品に貼合するための粘着剤層16や剥離シート17を設けることもできる。
Further, for example, as shown in FIG. 1 (b), the antiglare hard coat film of the present invention can be bonded to a polarizer to form a
That is, a
Next, a
Thereby, while having the outstanding anti-glare property, even if it is a case where it applies to a high-definition display, the
The
3.防眩性ハードコートフィルムの特性
(1)60°鏡面光沢度
また、JIS Z 8741に準拠して測定される防眩性ハードコートフィルムの60°鏡面光沢度を130%以下の値とすることが好ましい。
この理由は、60°鏡面光沢度が130%を超えた値となると、優れた防眩性を得ることが困難になる場合があるためである。
したがって、JIS Z 8741に準拠して測定される防眩性ハードコートフィルムの60°鏡面光沢度を120%以下の値とすることがより好ましく、115%以下の値とすることがさらに好ましい。
3. Characteristics of antiglare hard coat film (1) 60 ° specular gloss The 60 ° specular gloss of an antiglare hard coat film measured in accordance with JIS Z 8741 may be 130% or less. preferable.
This is because it may be difficult to obtain excellent antiglare properties when the 60 ° specular glossiness exceeds 130%.
Accordingly, the 60 ° specular gloss of the antiglare hard coat film measured in accordance with JIS Z 8741 is more preferably 120% or less, and even more preferably 115% or less.
(2)ギラツキ
また、図3(a)~(e)に示すような所定のppi(ピクセル/インチ)となるように光透過部を設けた格子状パターンを用いて、実施例において後述するようにして実施されるギラツキの評価結果を、80ppiを超えた範囲内の値とすることが好ましい。
この理由は、かかるギラツキの評価結果が80ppi以下の値となると、280ppi以上の実際の高精細ディスプレイに適用した場合に、ギラツキが発生しやすくなる場合があるためである。
したがって、実施例において後述するようにして実施されるギラツキの評価結果を90ppi以上の値とすることがより好ましく、100ppi以上の値とすることがさらに好ましい。
なお、防眩性ハードコートフィルムに起因したギラツキは、格子状パターンにおけるppiが大きくなるほど、言い換えればディスプレイが高精細になるほど発生しやすくなる。
したがって、上述したppiの数値は、大きければ大きいほどギラツキの発生を効果的に抑制できることを意味する。
(2) Glitter In addition, as will be described later in the embodiment, a grid pattern in which a light transmission portion is provided so as to have a predetermined ppi (pixel / inch) as shown in FIGS. It is preferable to set the glare evaluation result to be a value within a range exceeding 80 ppi.
This is because, when the evaluation result of the glare is a value of 80 ppi or less, glare is likely to occur when applied to an actual high-definition display of 280 ppi or more.
Therefore, it is more preferable to set the glare evaluation result implemented as described later in the examples to a value of 90 ppi or more, and more preferably to a value of 100 ppi or more.
The glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition.
Therefore, the larger the ppi value mentioned above, the more effectively the occurrence of glare can be suppressed.
(3)ヘイズ値
また、JIS K 7136に準拠して測定される防眩性ハードコートフィルムのヘイズ値を3~40%の範囲内の値とすることが好ましい。
この理由は、ヘイズ値が3%未満の値となると、優れた防眩性を得ることが困難になる場合があるためである。一方、ヘイズ値が40%を超えた値となると、ディスプレイの表示画像の視認性が低下する場合があるためである。
したがって、JIS K 7136に準拠して測定される防眩性ハードコートフィルムのヘイズ値を3.5~35%の範囲内の値とすることがより好ましく、4~30%の範囲内の値とすることがさらに好ましい。
(3) Haze value The haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is preferably set to a value in the range of 3 to 40%.
The reason for this is that when the haze value is less than 3%, it may be difficult to obtain excellent antiglare properties. On the other hand, if the haze value exceeds 40%, the visibility of the display image on the display may be lowered.
Accordingly, the haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is more preferably set to a value in the range of 3.5 to 35%, and a value in the range of 4 to 30%. More preferably.
(4)全光線透過率
また、JIS K 7361に準拠して測定される防眩性ハードコートフィルムの全光線透過率を85%以上の値とすることが好ましい。
この理由は、全光線透過率が85%未満の値となると、ディスプレイの表示画像の視認性が低下する場合があるためである。
したがって、JIS K 7361に準拠して測定される防眩性ハードコートフィルムの全光線透過率を88%以上の値とすることがより好ましく、90%以上の値とすることがさらに好ましい。
(4) Total light transmittance Moreover, it is preferable to make the total light transmittance of the anti-glare hard coat film measured based on JIS K 7361 into the value of 85% or more.
This is because the visibility of the display image on the display may be reduced when the total light transmittance is less than 85%.
Therefore, the total light transmittance of the antiglare hard coat film measured in accordance with JIS K 7361 is more preferably 88% or more, and even more preferably 90% or more.
(5)硬度
また、防眩性ハードコートフィルムは、スチールウールを用いた耐擦傷性の評価において外観変化なきものであることが好ましい。
この理由は、かかる耐擦傷性の評価において外観変化が認められる場合、ハードコートフィルムとして十分な耐擦傷性を得ることが困難になる場合があるためである。
なお、かかる耐擦傷性の評価の詳細は後述する。
(5) Hardness Moreover, it is preferable that an anti-glare hard coat film is a thing without an external appearance change in the abrasion-resistant evaluation using steel wool.
This is because it may be difficult to obtain sufficient scratch resistance as a hard coat film when a change in appearance is observed in the evaluation of scratch resistance.
Details of the evaluation of the scratch resistance will be described later.
4.防眩性ハードコートフィルムの製造方法
本発明の防眩性ハードコートフィルムの製造方法としては、まず、プラスチック基材の表面に、防眩性ハードコート層形成用組成物を、従来公知の方法、例えば、バーコート法、ナイフコート法、ロールコート法、ブレードコート法、ダイコート法、グラビアコート法等を用いてコーティングし、塗膜を形成する。
次いで、塗膜を乾燥した後、活性エネルギー線を照射して塗膜を硬化させて、塗膜を防眩性ハードコート層とすることにより防眩性ハードコートフィルムが得られる。
4). Method for Producing Antiglare Hard Coat Film As a method for producing the antiglare hard coat film of the present invention, first, a composition for forming an antiglare hard coat layer on the surface of a plastic substrate is a conventionally known method, For example, the coating is performed using a bar coating method, a knife coating method, a roll coating method, a blade coating method, a die coating method, a gravure coating method, or the like.
Subsequently, after drying a coating film, an active energy ray is irradiated, a coating film is hardened, and an anti-glare hard coat film is obtained by making a coating film into an anti-glare hard coat layer.
また、塗膜を硬化させる際の活性エネルギー線としては紫外線が挙げられ、かかる紫外線は高圧水銀ランプ、無電極ランプ、メタルハライドランプ、キセノンランプ等により照射することができる。
また、紫外線の照射量としては、通常100~500mJ/cm2の範囲内の値とすることが好ましい。
The active energy ray for curing the coating film includes ultraviolet rays, and the ultraviolet rays can be irradiated by a high-pressure mercury lamp, an electrodeless lamp, a metal halide lamp, a xenon lamp, or the like.
In addition, it is preferable that the irradiation amount of ultraviolet rays is usually in the range of 100 to 500 mJ / cm 2 .
以下、実施例を参照して、本発明の防眩性ハードコートフィルムをさらに詳細に説明する。 Hereinafter, the antiglare hard coat film of the present invention will be described in more detail with reference to Examples.
[実施例1]
1.防眩性ハードコートフィルムの製造
(1)防眩性ハードコート層形成用組成物の準備工程
表1および以下に示すように、(A)成分としての活性エネルギー線硬化性樹脂と、(B)成分としての樹脂微粒子と、(C)成分としての分散剤と、(D)成分としての光重合開始剤と、(E)成分としてのシリカ微粒子と、(F)成分としてのスリップ剤と、を混合するとともに、プロピレングリコールモノメチルエーテルにて希釈し、固形分30重量%の防眩性ハードコート層形成用組成物を調製した。
なお、表1および下記における配合量は、固形分換算された値を示す。
[Example 1]
1. Production of Antiglare Hard Coat Film (1) Preparation Step of Composition for Forming Antiglare Hard Coat Layer As shown in Table 1 and below, active energy ray-curable resin as component (A), and (B) Resin fine particles as a component, a dispersant as a component (C), a photopolymerization initiator as a component (D), a silica fine particle as a component (E), and a slip agent as a component (F). While mixing, it was diluted with propylene glycol monomethyl ether to prepare a composition for forming an antiglare hard coat layer having a solid content of 30% by weight.
In addition, the compounding quantity in Table 1 and the following shows the value converted into solid content.
(A)成分:多官能性アクリレート : 100重量部
(B)成分:架橋アクリル重合体樹脂微粒子 : 10重量部
(積水化成品工業(株)製、テクポリマーXX-27LA、体積平均粒子径:1.5μm、Cv値:23%)
(C)成分:カルボキシル基含有ポリマー変性物 : 0.1重量部
(共栄社化学(株)製、フローレン G700)
(D)成分:1-ヒドロキシ-シクロヘキシル-フェニル-ケトン
: 5重量部
(BSF(株)製、イルガキュア 184)
(E)成分:アクリロイル基導入ナノシリカゾル : 150重量部
(体積平均粒子径:50nm)
(F)成分:シリコーン変性ウレタンアクリレート/ウレタンアクリレート : 7重量部
(日本合成化学工業(株)製、紫光 UV-AF100)
(A) Component: Multifunctional acrylate: 100 parts by weight (B) Component: Cross-linked acrylic polymer resin fine particles: 10 parts by weight (manufactured by Sekisui Plastics Co., Ltd., Techpolymer XX-27LA, volume average particle diameter: 1 .5 μm, Cv value: 23%)
Component (C): Modified carboxyl group-containing polymer: 0.1 part by weight (Kyoeisha Chemical Co., Ltd., Floren G700)
Component (D): 1-hydroxy-cyclohexyl-phenyl-ketone: 5 parts by weight (manufactured by BSF Corporation, Irgacure 184)
Component (E): acryloyl group-introduced nano silica sol: 150 parts by weight (volume average particle diameter: 50 nm)
Component (F): Silicone-modified urethane acrylate / urethane acrylate: 7 parts by weight (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-AF100)
また、(B)成分のCv値とは、下記式(1)で表される粒子径分布の変動係数を意味する。
Cv値(%)=(標準偏差粒子径/体積平均粒子径)×100 (1)
また、(B)成分の体積平均粒子径およびCv値は、レーザー回折散乱式粒度分布測定装置(堀場製作所(株)製、LA-920)を用いて測定した。
このとき、分散溶剤としてメチルエチルケトンを使用した。
なお、実施例1で用いた(B)成分の粒度分布チャートを図4(a)に示す。
Further, the Cv value of the component (B) means a variation coefficient of the particle size distribution represented by the following formula (1).
Cv value (%) = (standard deviation particle diameter / volume average particle diameter) × 100 (1)
The volume average particle size and Cv value of the component (B) were measured using a laser diffraction / scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.).
At this time, methyl ethyl ketone was used as a dispersion solvent.
In addition, the particle size distribution chart of (B) component used in Example 1 is shown to Fig.4 (a).
(2)塗布工程
次いで、得られた防眩性ハードコート層形成用組成物を、プラスチック基材としての易接着層付きポリエステルフィルム(東レ(株)製、ルミラーU48、膜厚:100μm)の易接着剤層に、ワイヤーバー#14を用いて、硬化後の膜厚が5μmとなるように塗布し、塗布層を形成した。
(2) Coating process Next, the obtained composition for forming an antiglare hard coat layer was easily made into a polyester film with an easy-adhesion layer as a plastic substrate (manufactured by Toray Industries, Inc., Lumirror U48, film thickness: 100 μm). The
(3)乾燥工程
次いで、得られた塗布層を、熱風乾燥装置を用いて、70℃、1分間の条件で乾燥させた。
(3) Drying process Next, the obtained coating layer was dried under conditions of 70 ° C. for 1 minute using a hot air drying apparatus.
(4)硬化工程
次いで、乾燥させた塗布層に対して、紫外線照射装置(ジーエスユアサコーポレーション(株)製、光源:高圧水銀灯)を用いて、下記条件にて紫外線を照射し、塗布層を硬化して防眩性ハードコート層とし、最終的な防眩性ハードコートフィルムを得た。
照度:100mW/cm2
光量:240mJ/cm2
(4) Curing step Next, the dried coating layer is irradiated with ultraviolet rays under the following conditions using an ultraviolet irradiation device (GS Yuasa Corporation, light source: high-pressure mercury lamp) to cure the coating layer. Thus, a final antiglare hard coat film was obtained as an antiglare hard coat layer.
Illuminance: 100 mW / cm 2
Light intensity: 240 mJ / cm 2
2.評価
(1)防眩性の評価1
得られた防眩性ハードコートフィルムにおける防眩性を評価した。
すなわち、黒色の板の上に、得られた防眩性ハードコートフィルムを、防眩性ハードコート層が上になるように載置した。
次いで、防眩性ハードコートフィルムの上方で、3波長蛍光灯を点灯し、防眩性ハードコートフィルムによって反射させ、下記基準に沿って評価した。得られた結果を表2に示す。
○:防眩性ハードコートフィルムでの反射により視認される蛍光灯の輪郭がぼやける
×:防眩性ハードコートフィルムでの反射により視認される蛍光灯の輪郭がぼやけない
2. Evaluation (1) Evaluation 1 of antiglare property
The antiglare property of the obtained antiglare hard coat film was evaluated.
That is, the obtained antiglare hard coat film was placed on a black plate so that the antiglare hard coat layer was on top.
Next, a three-wavelength fluorescent lamp was turned on above the antiglare hard coat film, reflected by the antiglare hard coat film, and evaluated according to the following criteria. The obtained results are shown in Table 2.
○: The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is blurred. ×: The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is not blurred.
(2)防眩性の評価2
得られた防眩性ハードコートフィルムにおける防眩性を、鏡面光沢度(%)により評価した。
すなわち、光沢計(日本電色工業(株)製、VG2000)を用いて、得られた防眩性ハードコートフィルムの60°鏡面光沢度(%)を、JIS Z 8741に準拠して測定した。得られた結果を表2に示す。
(2) Anti-glare evaluation 2
The antiglare property of the obtained antiglare hard coat film was evaluated based on the specular gloss (%).
That is, using a gloss meter (Nippon Denshoku Industries Co., Ltd., VG2000), the 60 ° specular gloss (%) of the obtained antiglare hard coat film was measured according to JIS Z 8741. The obtained results are shown in Table 2.
(3)ギラツキの評価
得られた防眩性ハードコートフィルムにおけるギラツキの発生を評価した。
すなわち、図3(a)に示すように、60ppi(ピクセル/インチ)となるように光透過部を設けた格子状パターンを用意した。
かかる格子状パターンは、ガラス板上に金属蒸着層を設けた後、金属蒸着層にレジスト処理を行い、エッチングし、さらにレジストを除去することにより作成した。
次いで、用意した格子状パターンをバックライト(キング(株)製、ブライトボックス5000)上に載置した。
次いで、得られた防眩性ハードコートフィルムを格子状パターン上に防眩性ハードコート層が上になるように載置し、ギラツキの発生箇所を確認した。
次いで、防眩性ハードコートフィルムを、格子状パターン上でこれと平行な方向に移動させ、予め確認しておいたギラツキの発生箇所が、防眩性ハードコートフィルムと共に移動した場合は、当該ギラツキの発生が防眩性ハードコートフィルムに起因したものと判断した。
(3) Evaluation of glare The occurrence of glare in the obtained antiglare hard coat film was evaluated.
That is, as shown in FIG. 3A, a lattice pattern provided with a light transmission portion so as to be 60 ppi (pixels / inch) was prepared.
Such a lattice-shaped pattern was prepared by providing a metal vapor deposition layer on a glass plate, performing a resist treatment on the metal vapor deposition layer, etching, and then removing the resist.
Next, the prepared grid pattern was placed on a backlight (Bright Box 5000, manufactured by King Corp.).
Subsequently, the obtained antiglare hard coat film was placed on the lattice pattern so that the antiglare hard coat layer was on top, and the occurrence of glare was confirmed.
Next, the antiglare hard coat film is moved in a direction parallel to the lattice pattern, and when the occurrence of the glare previously confirmed moves together with the antiglare hard coat film, the glare It was judged that the occurrence of the phenomenon was caused by the antiglare hard coat film.
また、60ppiの格子状パターンでは防眩性ハードコートフィルムに起因したギラツキの発生が確認されなかった場合には、10ppi刻みでppiを増加させた格子状パターンを順次用いて、防眩性ハードコートフィルムに起因したギラツキの発生が確認されるまで、同様の作業を繰り返した。
表2に、防眩性ハードコートフィルムに起因したギラツキの発生が確認されない一番大きな格子状パターン(ppi)を示す。
なお、防眩性ハードコートフィルムに起因したギラツキは、格子状パターンにおけるppiが大きくなるほど、言い換えればディスプレイが高精細になるほど発生しやすくなる。
したがって、表2に示すppiの値が大きいほどギラツキの発生を効果的に抑制できていることを意味する。
また、図3(b)には80ppiの格子状パターンの写真を、図3(c)には100ppiの格子状パターンの写真を、図3(d)には140ppiの格子状パターンの写真を、図3(e)には180ppiの格子状パターンの写真をそれぞれ示す。
In addition, when the occurrence of glare due to the antiglare hard coat film was not confirmed in the lattice pattern of 60 ppi, the antiglare hard coat was sequentially used by increasing the ppi in increments of 10 ppi. The same operation was repeated until the occurrence of glare caused by the film was confirmed.
Table 2 shows the largest lattice pattern (ppi) in which the occurrence of glare due to the antiglare hard coat film is not confirmed.
The glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition.
Therefore, it means that generation | occurrence | production of glare can be suppressed effectively, so that the value of ppi shown in Table 2 is large.
FIG. 3B shows a photograph of an 80 ppi lattice pattern, FIG. 3C shows a photograph of a 100 ppi lattice pattern, and FIG. 3D shows a photograph of a 140 ppi lattice pattern. FIG. 3E shows photographs of a 180 ppi lattice pattern.
(4)ヘイズ値の評価
得られた防眩性ハードコートフィルムにおけるヘイズ値(%)を評価した。
すなわち、ヘイズメーター(日本電色工業(株)製、NDH5000)を用いて、得られた防眩性ハードコートフィルムのヘイズ値(%)を、JIS K 7136に準拠して測定した。得られた結果を表2に示す。
(4) Evaluation of haze value The haze value (%) in the obtained antiglare hard coat film was evaluated.
That is, the haze value (%) of the obtained antiglare hard coat film was measured based on JIS K 7136 using a haze meter (NDH5000, manufactured by Nippon Denshoku Industries Co., Ltd.). The obtained results are shown in Table 2.
(5)全光線透過率の評価
得られた防眩性ハードコートフィルムにおける全光線透過率(%)を評価した。
すなわち、ヘイズメーター(日本電色工業(株)製、NDH5000)を用いて、得られた防眩性ハードコートフィルムの全光線透過率(%)を、JIS K 7361に準拠して測定した。得られた結果を表2に示す。
(5) Evaluation of total light transmittance Total light transmittance (%) in the obtained antiglare hard coat film was evaluated.
That is, the total light transmittance (%) of the obtained antiglare hard coat film was measured based on JIS K 7361 using a haze meter (NDH5000, manufactured by Nippon Denshoku Industries Co., Ltd.). The obtained results are shown in Table 2.
(6)耐擦傷性の評価
得られた防眩性ハードコートフィルムにおける耐擦傷性を評価した。
すなわち、#0000のスチールウールを用いて、得られた防眩性ハードコートフィルムの防眩性ハードコート層を、250g/cm2の荷重で10cmの摺動距離にて10往復擦り試験を実施した。
次いで、防眩性ハードコート層における傷の有無を、3波長蛍光灯の下で目視にて確認し、下記基準に沿って評価した。得られた結果を表2に示す。
○:防眩性ハードコート層の外観に変化が確認されない
×:防眩性ハードコート層の外観に変化が確認される
(6) Evaluation of scratch resistance The scratch resistance of the obtained antiglare hard coat film was evaluated.
That is, using a # 0000 steel wool, the anti-glare hard coat layer of the obtained anti-glare hard coat film was subjected to a 10 reciprocating rub test at a load of 250 g / cm 2 and a sliding distance of 10 cm. .
Next, the presence or absence of scratches on the antiglare hard coat layer was visually confirmed under a three-wavelength fluorescent lamp, and evaluated according to the following criteria. The obtained results are shown in Table 2.
○: No change is confirmed in the appearance of the antiglare hard coat layer ×: A change is confirmed in the appearance of the antiglare hard coat layer
[実施例2]
実施例2では、防眩性ハードコート層形成用組成物における(A)~(B)および(E)成分を以下のように変えたほかは、実施例1と同様に防眩性ハードコートフィルムを製造し、評価した。得られた結果を表2に示す。
また、実施例2で用いた(B)成分の粒度分布チャートを図4(b)に示す。
[Example 2]
In Example 2, the antiglare hard coat film was the same as in Example 1 except that the components (A) to (B) and (E) in the antiglare hard coat layer forming composition were changed as follows. Were manufactured and evaluated. The obtained results are shown in Table 2.
Moreover, the particle size distribution chart of (B) component used in Example 2 is shown in FIG.4 (b).
(A1)成分:ウレタンアクリレート系プレポリマー : 70重量部
(A2)成分:多官能性アクリレート : 30重量部
(B)成分 :架橋アクリル-スチレン共重合樹脂微粒子
: 5重量部
(積水化成品工業(株)製、テクポリマーXX16LA、体積平均粒子径:2.5μm、Cv値:28%)
(E)成分 :ナノシリカゾル : 45重量部
(日産化学(株)製、MIBK-ST、体積平均粒子径:10nm)
(A1) Component: Urethane Acrylate Prepolymer: 70 parts by weight (A2) Component: Multifunctional acrylate: 30 parts by weight (B) Component: Crosslinked acrylic-styrene copolymer resin fine particles: 5 parts by weight (Sekisui Plastics Industry ( Co., Ltd., Techpolymer XX16LA, volume average particle size: 2.5 μm, Cv value: 28%)
Component (E): Nanosilica sol: 45 parts by weight (manufactured by Nissan Chemical Co., Ltd., MIBK-ST, volume average particle size: 10 nm)
[実施例3]
実施例3では、防眩性ハードコート層形成用組成物における(A)~(E)成分を以下のように変えたほかは、実施例1と同様に防眩性ハードコートフィルムを製造し、評価した。得られた結果を表2に示す。
[Example 3]
In Example 3, an antiglare hard coat film was produced in the same manner as in Example 1, except that the components (A) to (E) in the antiglare hard coat layer forming composition were changed as follows: evaluated. The obtained results are shown in Table 2.
(A)成分:多官能性アクリレート(ジペンタエリスリトールヘキサアクリレート) : 100重量部
(新中村工業(株)製、NK エステル A-DPH)
(B)成分:シリコーン樹脂微粒子 : 5重量部
(モメンティブ(株)製、トスパール 120、体積平均粒子径:2μm、Cv値:20%)
(C)成分:カルボキシル基含有ポリマー変性物 :0.05重量部
(共栄社化学(株)製、フローレン G700)
(D)成分:1-ヒドロキシ-シクロヘキシル-フェニル-ケトン
: 3重量部
(BSF(株)製、イルガキュア 184)
(E)成分:反応性ナノシリカゾル : 18重量部
(日産化学(株)製、MIBK-SD、体積平均粒子径:10nm)
Component (A): Multifunctional acrylate (dipentaerythritol hexaacrylate): 100 parts by weight (manufactured by Shin-Nakamura Kogyo Co., Ltd., NK Ester A-DPH)
(B) component: Silicone resin fine particles: 5 parts by weight (Momentive Co., Ltd.,
Component (C): Modified carboxyl group-containing polymer: 0.05 parts by weight (Kyoeisha Chemical Co., Ltd., Floren G700)
Component (D): 1-hydroxy-cyclohexyl-phenyl-ketone: 3 parts by weight (manufactured by BSF Corporation, Irgacure 184)
Component (E): Reactive nano silica sol: 18 parts by weight (manufactured by Nissan Chemical Co., Ltd., MIBK-SD, volume average particle size: 10 nm)
[実施例4]
実施例4では、防眩性ハードコート層形成用組成物において(F)成分を配合しなかったほかは、実施例1と同様に防眩性ハードコートフィルムを製造し、評価した。得られた結果を表2に示す。
[Example 4]
In Example 4, an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (F) was not blended in the antiglare hard coat layer forming composition. The obtained results are shown in Table 2.
[比較例1]
比較例1では、防眩性ハードコート層形成用組成物における(B)成分を以下のように変えたほかは、実施例1と同様に防眩性ハードコートフィルムを製造し、評価した。得られた結果を表2に示す。
また、比較例1で用いた(B)成分の粒度分布チャートを図5に示す。
(B)成分:架橋アクリル重合体樹脂微粒子 : 10重量部
(綜研化学(株)製、MX-80H3wt、体積平均粒子径:0.8μm、Cv値:10%)
[Comparative Example 1]
In Comparative Example 1, an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2.
Further, a particle size distribution chart of the component (B) used in Comparative Example 1 is shown in FIG.
(B) Component: Crosslinked acrylic polymer resin fine particles: 10 parts by weight (manufactured by Soken Chemical Co., Ltd., MX-80H3 wt, volume average particle size: 0.8 μm, Cv value: 10%)
[比較例2]
比較例2では、防眩性ハードコート層形成用組成物における(B)成分を以下のように変えたほかは、実施例1と同様に防眩性ハードコートフィルムを製造し、評価した。得られた結果を表2に示す。
(B)成分:架橋アクリル重合体樹脂微粒子 : 10重量部
(綜研化学(株)製、Mx-300、体積平均粒子径:3μm、Cv値:10%)
[Comparative Example 2]
In Comparative Example 2, an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2.
Component (B): Cross-linked acrylic polymer resin fine particles: 10 parts by weight (manufactured by Soken Chemical Co., Ltd., Mx-300, volume average particle size: 3 μm, Cv value: 10%)
以上、詳述したように、本発明によれば、防眩性ハードコート層を形成するための防眩性ハードコート層形成用組成物に対し、所定の体積平均粒子径を有する樹脂微粒子を所定の割合で配合するとともに、所定の分散剤を所定の割合で配合することにより、優れた防眩性を維持しつつ、ギラツキの発生についても効果的に抑制できるようになった。
その結果、本発明によれば、優れた防眩性を有するとともに、高精細ディスプレイに適用した場合であっても、ギラツキの発生を効果的に抑制することができる防眩性ハードコートフィルムを得ることができるようになった。
したがって、本発明の防眩性ハードコートフィルムは、高精細ディスプレイにおける視認性の向上に著しく寄与することが期待される。
As described above in detail, according to the present invention, resin fine particles having a predetermined volume average particle diameter are predetermined for an antiglare hard coat layer forming composition for forming an antiglare hard coat layer. In addition, by adding a predetermined dispersant at a predetermined ratio, it has become possible to effectively suppress the occurrence of glare while maintaining excellent antiglare properties.
As a result, according to the present invention, an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display is obtained. I was able to do it.
Therefore, the antiglare hard coat film of the present invention is expected to contribute significantly to the improvement of visibility in a high-definition display.
12:プラスチック基材、12a、b:TACフィルム、13:防眩性ハードコート層、14:防眩性ハードコートフィルム、15a、b:接着剤層、16:粘着剤層、17:剥離シート、20:偏光板 12: Plastic substrate, 12a, b: TAC film, 13: Antiglare hard coat layer, 14: Antiglare hard coat film, 15a, b: Adhesive layer, 16: Adhesive layer, 17: Release sheet, 20: Polarizing plate
Claims (6)
前記防眩性ハードコート層が、(A)成分としての活性エネルギー線硬化性樹脂と、(B)成分としての樹脂微粒子と、(C)成分としての分散剤と、(D)成分としての光重合開始剤と、を含む防眩性ハードコート層形成用組成物の硬化物からなるとともに、
前記(B)成分としての樹脂微粒子の体積平均粒子径を1~2.5μmの範囲内の値とし、前記(B)成分としての樹脂微粒子の配合量を、前記(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0.1~20重量部の範囲内の値とし、かつ、
前記(C)成分としての分散剤が、分子内に少なくとも1つの極性基を有するとともに、前記極性基として、カルボキシル基、ヒドロキシル基、スルホ基、1級アミノ基、2級アミノ基、3級アミノ基、アミド基、第4級アンモニウム塩基、ピリジウム塩基、スルホニウム塩基およびホスホニウム塩基からなる群から選択される少なくとも一種を有する化合物であり、前記(C)成分としての分散剤の配合量を、前記(A)成分としての活性エネルギー線硬化性樹脂100重量部に対して、0~2重量部(但し、0重量部を除く。)の範囲内の値とすることを特徴とする防眩性ハードコートフィルム。 An antiglare hard coat film comprising an antiglare hard coat layer on the surface of a plastic substrate,
The antiglare hard coat layer comprises an active energy ray-curable resin as component (A), resin fine particles as component (B), a dispersant as component (C), and light as component (D). And a cured product of a composition for forming an antiglare hard coat layer containing a polymerization initiator,
The volume average particle diameter of the resin fine particles as the component (B) is set to a value within the range of 1 to 2.5 μm, and the blending amount of the resin fine particles as the component (B) is defined as the active energy as the component (A). A value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the linear curable resin, and
The dispersant as the component (C) has at least one polar group in the molecule, and the polar group includes a carboxyl group, a hydroxyl group, a sulfo group, a primary amino group, a secondary amino group, and a tertiary amino group. A compound having at least one selected from the group consisting of a group, an amide group, a quaternary ammonium base, a pyridium base, a sulfonium base, and a phosphonium base, and the blending amount of the dispersant as the component (C) is ( A) Antiglare hard coat characterized by having a value within the range of 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as component A) the film.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016509711A JP6603652B2 (en) | 2014-03-26 | 2014-03-26 | Anti-glare hard coat film |
| PCT/JP2014/058552 WO2015145618A1 (en) | 2014-03-26 | 2014-03-26 | Anti-glare hard coat film |
| KR1020167016985A KR102116291B1 (en) | 2014-03-26 | 2014-03-26 | Anti-glare hard coat film |
| CN201480071029.7A CN105874357B (en) | 2014-03-26 | 2014-03-26 | Hard-coated antiglare film |
| TW104107911A TWI648154B (en) | 2014-03-26 | 2015-03-12 | Anti-glare hard coat film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/058552 WO2015145618A1 (en) | 2014-03-26 | 2014-03-26 | Anti-glare hard coat film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015145618A1 true WO2015145618A1 (en) | 2015-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/058552 Ceased WO2015145618A1 (en) | 2014-03-26 | 2014-03-26 | Anti-glare hard coat film |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6603652B2 (en) |
| KR (1) | KR102116291B1 (en) |
| CN (1) | CN105874357B (en) |
| TW (1) | TWI648154B (en) |
| WO (1) | WO2015145618A1 (en) |
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| WO2019221000A1 (en) * | 2018-05-15 | 2019-11-21 | 株式会社ポラテクノ | Photosensitive resin composition and antiglare film |
| US11313995B2 (en) | 2017-08-04 | 2022-04-26 | Daicel Corporation | Anti-glare film |
| US11613643B2 (en) | 2017-08-04 | 2023-03-28 | Daicel Corporation | Antiglare film |
| US11650357B2 (en) | 2017-08-04 | 2023-05-16 | Daicel Corporation | Anti-glare film |
| WO2024127722A1 (en) * | 2022-12-12 | 2024-06-20 | 日東電工株式会社 | Curable resin composition, polarizing film, multilayer optical film and image display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160137508A (en) | 2016-11-30 |
| KR102116291B1 (en) | 2020-05-29 |
| TWI648154B (en) | 2019-01-21 |
| CN105874357B (en) | 2018-08-21 |
| TW201601904A (en) | 2016-01-16 |
| CN105874357A (en) | 2016-08-17 |
| JP6603652B2 (en) | 2019-11-06 |
| JPWO2015145618A1 (en) | 2017-04-13 |
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