WO2013047626A1 - 防眩ハードコートフィルム - Google Patents
防眩ハードコートフィルム Download PDFInfo
- Publication number
- WO2013047626A1 WO2013047626A1 PCT/JP2012/074810 JP2012074810W WO2013047626A1 WO 2013047626 A1 WO2013047626 A1 WO 2013047626A1 JP 2012074810 W JP2012074810 W JP 2012074810W WO 2013047626 A1 WO2013047626 A1 WO 2013047626A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hard coat
- film
- antiglare hard
- glare
- antiglare
- Prior art date
Links
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- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 claims description 4
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Images
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- 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
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
-
- 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
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
Definitions
- the present invention relates to an antiglare hard coat film suitable for preventing a reduction in visibility used on the surface of various displays typified by liquid crystal displays, plasma displays, and organic EL displays.
- the average particle diameter is 0.5 to 5.0 ⁇ m
- the difference in refractive index from the transparent resin is 0.02 to 0.20.
- An antiglare film containing translucent fine particles is disclosed.
- the difference in refractive index between the translucent resin constituting the antiglare layer and the translucent fine particles contained therein is 0.02 to 0.20.
- the image definition can be maintained high even if the haze value is increased to reduce glare.
- the haze of the film specifically obtained is as high as 10% or more and has an antiglare property, while the coating film becomes whitish and the transmittance and contrast are remarkably reduced.
- Patent Document 2 discloses that in an anti-glare film, the difference in refractive index between a cured binder and a light-transmitting fine particle is limited to a small range of 0 to 0.05.
- the light transmittance inside the antiglare hard coat layer can be improved, and the arithmetic average roughness (Ra) measured in accordance with JIS B 0601-1994 on the surface of the antiglare hard coat layer Is suppressed to a small range of 0.01 to 0.30 ⁇ m and the average interval of unevenness (Sm) of 10 to 300 ⁇ m, so that while diffusing light on the surface (outer surface) of the antiglare hard coat layer, Light transmittance can be maintained, and the anti-glare film is said to be able to exhibit a good balance between suppression of glare and improvement of transmission clarity.
- Ra arithmetic average roughness measured in accordance with JIS B 0601-1994 on the surface of the antiglare hard coat layer
- the range of arithmetic average roughness (Ra) of 0.01 to 0.30 ⁇ m and the average interval of unevenness (Sm) of 10 to 300 ⁇ m is not small, and most of the anti-glare films currently on the market are Applicable to the range.
- the film obtained specifically has an arithmetic average roughness (Ra) of 0.1 ⁇ m or more, an image sharpness value measured through an optical comb having a width of 2 mm is less than 70%, and a reflection of 60 degrees.
- the measured image sharpness value is 60% or less, the antiglare property is not achieved, but glare prevention on the high-definition panel is insufficient, and the whiteness of the coating film is not taken into consideration. The problem remains that the contrast is significantly reduced.
- the haze value is increased from the viewpoint of preventing glare, and the image clarity cannot be sufficiently increased, so the low transmittance and the whitishness of the coating are eliminated. If the image is not formed and the image is displayed, the screen becomes whitish, and there is a problem that the image quality is deteriorated particularly in the black display.
- the object of the present invention is to provide a high transmittance, a low haze value, excellent transparency, and image clarity, without imparting an antiglare property more than necessary, compared to such a conventional antiglare film.
- an antiglare hard coat film comprising an antiglare hard coat layer containing fine particles and a resin on a transparent film, Maximum cross-section height expressed by the difference between the maximum height in the evaluation area and the minimum height in the evaluation area when the average height in the evaluation area on the surface of the hard coat film is zero.
- the present inventors have found that the above-mentioned problems can be solved when the thickness is 1.0 to 3.0 ⁇ m and the average inclination angle of the irregularities on the surface of the antiglare hard coat film is 1 degree or less.
- an antiglare hard coat film having a low haze value, high transmittance, and excellent transparency can be obtained, glare of an image can be suppressed and display visibility can be improved.
- transmission measured through four optical combs width 2 mm, 1 mm, 0.5 mm, 0.125 mm
- a transmission sharpness measuring device based on JIS K 7105-1981 When the total value of the sharpness is 280% or more and the transmission sharpness value measured through each optical comb is 70% or more, the image sharpness is high and the whiteness of the coating film (white blur) ) Can be reduced to suppress a decrease in contrast, and the visibility of the display can be improved.
- the fine particles have an average particle diameter of 1.0 to 4.8 ⁇ m, and the coating thickness of the antiglare hard coat layer is 0 of the average particle diameter of the fine particles. It is preferably 5 to 1.5 times.
- the average particle size of the fine particles is more preferably 3.0 to 4.8 ⁇ m.
- the amount of the fine particles is 0.05 to 3 parts by weight with respect to 100 parts by weight of the resin.
- the antiglare hard coat film has a haze value of 0.1 to 5.0%, a 60 ° specular gloss of 70% to 95%, and a 20 ° specular gloss of 30% to 90%. Furthermore, when the luminous transmittance (transmission Y value) is 92.00 or more, the effect of the present invention can be further exhibited.
- the transparent film used in the present invention for example, a triacetyl cellulose film, a polyethylene terephthalate film, or a norbornene film is preferable from the viewpoint of high visibility and price.
- the transmittance is high, the haze value is low, the transparency is excellent, the image clarity is high, and the image is not glaring, as compared with the conventional antiglare film.
- the antiglare hard coat film of the present invention is an antiglare hard coat film in which an antiglare hard coat layer containing fine particles and a resin is provided on a transparent film, and the evaluation region of the surface of the antiglare hard coat film
- the maximum cross-sectional height represented by the difference between the maximum height value in the evaluation region and the minimum height value in the evaluation region when the average value of the inner heights is zero (zero) is 1.0-3.
- the average inclination angle of the irregularities on the surface of the antiglare hard coat film is 0 ° or less, and is characterized by being 1 ° or less.
- maximum cross-sectional height is as defined above, but as defined in JIS B0601, it is a value calculated from the cross-sectional curve (measurement curve) of the film surface that is the object of measurement. is there.
- the surface of the antiglare hard coat film provided with the antiglare hard coat layer containing the fine particles and the resin as in the present invention has not only fine irregular shapes but also undulations.
- a measurement curve (usually called a cross-section curve) measured with a surface roughness measuring machine is between a waviness curve and a roughness curve.
- cross-sectional curve waviness curve + roughness curve. Therefore, the “maximum cross-sectional height” in the present invention evaluates a cross-sectional curve including a “surface waviness component”.
- the maximum cross-sectional height is represented by the symbol “Pt”.
- the above “average inclination angle” refers to the slope of a line segment that divides a cross-sectional curve (measurement curve) of the film surface to be measured at a constant interval ⁇ X and connects the start points of the cross-sectional curves in each section.
- the inclination angle is obtained by calculating the absolute value of tan ⁇ 1 (determined by ⁇ Yi / ⁇ X) and averaging the values ( ⁇ a) (see FIG. 1), that is, the average inclination angle ( ⁇ a ) Is a value defined by the following formula.
- the reason why the antiglare hard coat film of the present invention has a low haze value, high transmittance, and excellent transparency is presumed as follows.
- the haze value of the antiglare hard coat film is attributed to the surface haze generated when light is refracted and scattered due to the irregularities on the surface of the antiglare hard coat layer and the presence of fine particles in the antiglare hard coat layer. There is an internal haze generated by light being refracted and scattered, and the maximum height in the evaluation area when the average height in the evaluation area on the surface of the antiglare hard coat film is zero.
- the maximum cross-sectional height expressed by the difference between the height of the evaluation area and the minimum height in the evaluation area is 1.0 to 3.0 ⁇ m, and the average inclination angle of the irregularities on the surface of the antiglare hard coat film is 1 degree or less
- the surface properties such as the undulation of the specific region or the gentle (gradual) surface unevenness can be obtained, and the refraction and scattering of the light caused by the surface unevenness can be suppressed, so that the surface haze is hardly expressed and the light Light loss due to refraction and scattering is suppressed
- With the decrease in transmittance can be suppressed because it is, by the scattered light in the antiglare hard coat layer surface is considered that excellent transparency since the antiglare hard coat film is suppressed phenomenon turbid whitish.
- the lower limit of the maximum cross-sectional height is not particularly limited, but when the maximum cross-sectional height is less than 1.0 ⁇ m, the unevenness of the film surface becomes too small, and thus the scattered light on the surface of the antiglare hard coat layer. It becomes difficult to obtain the antiglare property due to. Further, when the average inclination angle is larger than 1 degree (more than 1 degree), refraction and scattering of light due to surface unevenness is enhanced, so that surface haze is easily developed, and light loss due to refraction and scattering of light.
- the maximum cross-sectional height of the surface of the antiglare hard coat film is preferably 1.0 ⁇ m or more and 3.0 ⁇ m or less, and more preferably the maximum cross-sectional height is 1.2 ⁇ m or more and 2 or less. .5 ⁇ m or less.
- the average inclination angle of the surface of the antiglare hard coat film is preferably 1 degree or less, more preferably the average inclination angle is 0.9 degree, and further preferably the average inclination angle is 0.7 degree. Less than or equal to degrees. Although there is no restriction
- the “evaluation region” is a measurement region.
- the antiglare hard coat film of the present invention it is measured through four optical combs (width 2 mm, 1 mm, 0.5 mm, 0.125 mm) using a transmission sharpness measuring device based on JIS K 7105-1981.
- the total value of the transmission definition is 280% or more, and the transmission definition value measured through each optical comb is 70% or more, so that the image definition is high and the whiteness of the coating film (white) It is possible to reduce blur and suppress a decrease in contrast and improve the visibility of the display.
- the transparent film that can be used in the present invention is not particularly limited.
- a polyethylene terephthalate film (PET; refractive index 1.665), a polycarbonate film (PC; refractive index 1.582), a triacetyl cellulose film (TAC) ; Refractive index 1.485), norbornene film (NB; refractive index 1.525) can be used, and the film thickness is not particularly limited, but about 25 ⁇ m to 250 ⁇ m is generally used. Since the refractive index of a general ionizing radiation curable resin is about 1.52, a TAC film or NB film close to the refractive index of the resin is preferable in order to increase the visibility. A PET film is preferred.
- the resin used in the present invention can be used without particular limitation as long as it is a resin that forms a film.
- it imparts hard properties (pencil hardness, scratch resistance) to the surface of the antiglare hard coat layer, and also provides antiglare hard.
- An ionizing radiation curable resin is preferred in that a large amount of heat is not required when forming the coat layer.
- the antiglare hard coat layer is a leveling agent, antifoaming agent, lubricant, ultraviolet absorber, light stabilizer, polymerization inhibitor, wetting and dispersing agent, rheology control agent, antioxidant as long as the effect of the present invention is not changed.
- An agent, an antifouling agent, an antistatic agent, a conductive agent and the like may be contained as necessary.
- the ionizing radiation curable resin is not particularly limited as long as it is a transparent resin that is cured by irradiation with an electron beam or ultraviolet rays.
- a urethane acrylate resin a polyester acrylate resin, and an epoxy acrylate resin It can select suitably from resin etc.
- Preferred examples of the ionizing radiation curable resin include those composed of an ultraviolet curable polyfunctional acrylate having two or more (meth) acryloyl groups in the molecule.
- UV-curable polyfunctional acrylate having two or more (meth) acryloyl groups in the molecule include neopentyl glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and trimethylol.
- Polyol polyacrylates such as propane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, bisphenol A diglycidyl Epoxys such as diacrylate of ether, diacrylate of neopentyl glycol diglycidyl ether, di (meth) acrylate of 1,6-hexanediol diglycidyl ether ( A) Polyester (meth) acrylate, polyhydric alcohol, polyisocyanate and hydroxyl group-containing (meta) which can be obtained by esterifying acrylate, polyhydric alcohol and polyhydric carboxylic acid and / or anhydride and acrylic acid ) Urethane (meth) acrylate obtained by reacting acrylate,
- the UV-curable polyfunctional acrylates may be used alone or in combination of two or more, and the content thereof is preferably 50 to 95% by weight based on the resin solid content of the antiglare hard coat layer coating material. is there.
- the content thereof is preferably 50 to 95% by weight based on the resin solid content of the antiglare hard coat layer coating material. is there.
- polyfunctional (meth) acrylate preferably 10% by weight or less of 2-hydroxy (meth) acrylate, 2-hydroxypropyl (meta) with respect to the resin solid content of the antiglare hard coat layer coating material.
- Monofunctional acrylates such as acrylate and glycidyl (meth) acrylate can also be added.
- a polymerizable oligomer used for the purpose of adjusting the hardness can be added to the antiglare hard coat layer.
- oligomers include terminal (meth) acrylate polymethyl (meth) acrylate, terminal styryl poly (meth) acrylate, terminal (meth) acrylate polystyrene, terminal (meth) acrylate polyethylene glycol, terminal (meth) acrylate acrylonitrile-styrene copolymer.
- Examples thereof include macromonomers such as polymers and terminal (meth) acrylate styrene-methyl methacrylate copolymers, and the content thereof is preferably 5 to 50% by weight with respect to the solid content of the resin in the antiglare hard coat paint. %.
- the material for forming the fine particles used in the present invention is not particularly limited.
- silica (refractive index 1.420 to 1.460), vinyl chloride resin (refractive index 1.530), acrylic resin (refractive index 1.. 490), (meth) acrylic resin (refractive index 1.520 to 1.530), polystyrene resin (refractive index 1.590), melamine resin (refractive index 1.650), polyethylene resin, polycarbonate resin, acrylic-styrene copolymer Resin (refractive index: 1.490 to 1.590) and the like, and the fine particles may be used alone or in combination of two or more.
- the refractive index of the fine particles is not limited, but in order to further obtain the effects of the present invention, the fine particles have a refractive index difference of 0.001 with respect to the refractive index of the resin used for the antiglare hard coat layer. It is preferable to use fine particles having a refractive index of ⁇ 0.200, and it is particularly preferable to use fine particles having a refractive index difference of 0.001 to 0.100.
- the coating thickness of the antiglare hard coat layer is preferably 0.5 to 1.5 times the average particle size of the fine particles constituting the antiglare hard coat layer, more preferably 0. .8 to 1.2 times.
- the average particle diameter of the fine particles is preferably 1.0 to 4.8 ⁇ m, and the average particle diameter of the fine particles is more preferably 3.0 to 4.8 ⁇ m in order to impart high pencil hardness.
- the coating film thickness is less than 0.5 times the average particle size of the fine particles constituting the antiglare hard coat layer, the fine particles are not fixed in the coating film, and the hardness of the coating film surface is remarkably deteriorated.
- the coating thickness exceeds 1.5 times the average particle size of the fine particles constituting the antiglare hard coat layer, no antiglare property can be obtained.
- the average particle diameter of the fine particles can be measured by, for example, a laser diffraction scattering method. Further, when the average particle size of the fine particles is larger than 4.8 ⁇ m, it is more than necessary when the coating thickness of the antiglare hard coat layer is set to 0.5 to 1.5 times the average particle size of the fine particles.
- the anti-glare property is imparted, and the scattering of external light on the surface of the coating film increases, and the surface becomes whitish due to the scattering of light, and the visibility of the display is remarkably lowered.
- the coating film thickness must be reduced, so that the hard property is lacking.
- the fine particles are preferably added in an amount of 0.05 to 3 parts by weight, more preferably 0.075 to 1 part by weight, based on 100 parts by weight of the resin, in the antiglare hard coat layer. Preferably 0.1 to 0.5 parts by weight is blended.
- the coating thickness of the antiglare hard coat layer is 0.5 to 1.5 times the average particle diameter of the fine particles.
- the compounding quantity of microparticles exceeds 3 weight part with respect to 100 weight part of said resin, a haze value will become high and the transmittance
- the antiglare hard coat film of the present invention is an antiglare hard coat film in which an antiglare hard coat layer containing fine particles and a resin is provided on a transparent film, the antiglare hard coat film.
- the maximum cross-sectional height represented by the difference between the maximum height in the evaluation area and the minimum height in the evaluation area when the average value of the height in the evaluation area of the surface is zero (zero) is 1 0.04 to 3.0 ⁇ m, and the average inclination angle of the unevenness on the surface of the antiglare hard coat film is 1 degree or less, and four optical combs using a transmission sharpness measuring device based on JIS K 7105-1981 ( The total value of transmitted sharpness measured through a width of 2 mm, 1 mm, 0.5 mm, and 0.125 mm is 280% or more, and the transmitted sharpness value measured through each optical comb is 70% or more.
- the fine particles have an average particle diameter of 1.0 to 4.8 ⁇ m, and the coating thickness of the antiglare hard coat layer is 0.5 to 1.5 of the average particle diameter of the fine particles. It is preferable that the amount of the fine particles is 0.05 to 3 parts by weight with respect to 100 parts by weight of the resin.
- the antiglare hard coat film preferably has a haze value of 0.1 to 5.0%, more preferably a haze value of 0.1 to 3.5%, still more preferably a haze value of 0. .1 to 2.0%.
- the anti-glare hard coat layer can be formed by coating and drying a paint obtained by dissolving and dispersing the resin and fine particles in a solvent on a transparent film.
- the solvent can be appropriately selected depending on the solubility of the resin, and may be any solvent that can uniformly dissolve or disperse at least solid content (resin, fine particles, catalyst, curing agent, and other additives).
- Examples of such a solvent include ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), ethers (dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (hexane, etc.), alicyclic hydrocarbons ( Cyclohexane, etc.), aromatic hydrocarbons (toluene, xylene, etc.), halogenated carbons (dichloromethane, dichloroethane, etc.), esters (methyl acetate, ethyl acetate, butyl acetate, etc.), alcohols (methanol, ethanol, isopropanol, Butanol, cyclohexanol, etc.), cellosolves (methyl cellosolve, ethyl cellosolve, etc.), cellosolve acetates, sulfoxides, amides and the like.
- the coating method of the anti-glare hard coat layer is not particularly limited, but the coating thickness can be adjusted by gravure coating, micro gravure coating, bar coating, slide die coating, slot die coating, dip coating, etc. Coating is possible with an easy method.
- the film thickness of the coated antiglare hard coat layer can be measured by observing a cross-sectional photograph of the antiglare film with a microscope or the like and actually measuring from the coating film interface to the surface.
- the 60 ° specular gloss is preferably 70% or more and 95% or less, and the 20 ° specular gloss is preferably 30% or more and 90% or less.
- the transmittance (transmission Y value) is preferably 92.00 or more.
- a functional layer such as an antireflection layer or an antistatic layer can be provided on the transparent film in addition to the antiglare hard coat layer containing fine particles and a resin. is there.
- a functional layer is provided on the anti-glare hard coat layer containing fine particles.
- the thickness of the functional layer is desirably 0.5 ⁇ m or less.
- the functional layer includes a refractive index control layer for improving the antireflection function, an easy adhesion layer for obtaining adhesion between the base material and the antiglare hard coat layer, and an antistatic layer.
- a functional layer such as an antireflection layer or an antistatic layer is contained on the transparent film.
- a functional layer such as an antireflection layer or an antistatic layer.
- the antiglare hard coat film of the present invention is provided with a functional layer such as an antireflection layer or an antistatic layer on the antiglare hard coat layer containing the fine particles and the resin on the transparent film
- a functional layer such as an antireflection layer or an antistatic layer on the antiglare hard coat layer containing the fine particles and the resin on the transparent film
- the maximum height in the evaluation area and the minimum height in the evaluation area when the average height in the evaluation area of the surface of the antiglare hard coat film, that is, the surface of the functional layer is zero.
- the maximum cross-sectional height expressed by the difference between the above and the above is 1.0 to 3.0 ⁇ m, and the average inclination angle of the irregularities on the surface of the functional layer is required to be 1 degree or less.
- the following examples illustrate the invention, but are not intended to limit the invention.
- the average particle size of the fine particles was measured with a laser diffraction particle size analyzer SALD2200 (manufactured by Shimadzu Corporation).
- the thickness of the coating film was measured by observing the cross section with a scanning electron microscope manufactured by Keyence Corporation.
- parts and “%” described below represent “parts by weight” and “% by weight”, respectively.
- Example 1 ⁇ Preparation of paint> To 70.0 g of toluene, 0.09 g of acrylic-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525) was added and stirred sufficiently.
- acrylic-styrene copolymer particles manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525
- Example 2 ⁇ Preparation of paint> Example 1 except that the acrylic-styrene copolymer particles used in Example 1 were changed to melamine resin-silica composite particles (manufactured by Nissan Chemical Industries, Ltd., average particle size 2.0 ⁇ m, refractive index 1.650). A paint was prepared in the same manner as described above. ⁇ Preparation of antiglare film> An antiglare film was produced in the same manner as in Example 1. The thickness of the obtained coating film was 1.6 ⁇ m.
- Example 3 ⁇ Preparation of paint> To 80.00 g of toluene, 0.02 g of acrylic particles (manufactured by Soken Chemical Co., Ltd., average particle size 1.5 ⁇ m, refractive index: 1.49) was added and sufficiently stirred. Acrylic UV curable resin (Toyo Ink Mfg. Co., Ltd., refractive index: 1.49) 18.02 g and Irgacure 184 (photopolymerization initiator, Ciba Specialty Chemicals Co., Ltd.) 1.00 g BYK325 (leveling agent, manufactured by Big Chemie Co., Ltd.) (0.96 g) was added and sufficiently stirred to prepare a paint.
- Example 4 ⁇ Preparation of paint> The same method as in Example 1 except that the acrylic-styrene copolymer particles used in Example 1 were changed to particles having an average particle size of 3.0 ⁇ m (manufactured by Sekisui Plastics Co., Ltd., refractive index 1.525). A paint was prepared.
- Example 5 ⁇ Preparation of paint> To 70.0 g of toluene, 0.75 g of acrylic-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525) was added and stirred sufficiently.
- acrylic-styrene copolymer particles manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525
- Example 6 ⁇ Preparation of paint> To 70.0 g of toluene, 0.02 g of acrylic-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525) was added and stirred sufficiently.
- acrylic-styrene copolymer particles manufactured by Sekisui Plastics Co., Ltd., average particle size 2.0 ⁇ m, refractive index: 1.525
- Example 7 ⁇ Preparation of paint> To 45.0 g of toluene, 0.17 g of acrylic-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 4.0 ⁇ m, refractive index: 1.525) was added and stirred sufficiently.
- Example 8 ⁇ Preparation of paint> 0.18 g of acryl-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 3.3 ⁇ m, refractive index: 1.525) was added to 65.0 g of butyl acetate and sufficiently stirred.
- Acrylic ultraviolet curable resin manufactured by Nippon Synthetic Chemical Industry Co., Ltd., refractive index: 1.52
- 32.50 g and Irgacure 184 photopolymerization initiator, manufactured by Ciba Specialty Chemicals Co., Ltd.
- 75 g and 0.57 g of BYK325 leveling agent, manufactured by Big Chemie Co., Ltd.
- BYK325 leveling agent, manufactured by Big Chemie Co., Ltd.
- Example 9 ⁇ Preparation of paint> To 60.0 g of butyl acetate, 0.20 g of acrylic-styrene copolymer particles (manufactured by Sekisui Plastics Co., Ltd., average particle size 4.8 ⁇ m, refractive index: 1.525) was added and stirred sufficiently.
- acrylic-styrene copolymer particles manufactured by Sekisui Plastics Co., Ltd., average particle size 4.8 ⁇ m, refractive index: 1.525
- Acrylic ultraviolet curable resin (Nippon Synthetic Chemical Industry Co., Ltd., refractive index: 1.52) 15.96 g and Irgacure 184 (photopolymerization initiator, Ciba Specialty Chemical Co., Ltd.) 90 g and 0.96 g of BYK325 (leveling agent, manufactured by Big Chemie Co., Ltd.) were added and sufficiently stirred to prepare a paint.
- ⁇ Preparation of antiglare film> An antiglare film was produced in the same manner as in Example 1. The thickness of the obtained coating film was 1.2 ⁇ m.
- Example 5 ⁇ Preparation of paint> The same method as in Example 1 except that the acrylic-styrene copolymer particles used in Example 1 were changed to particles having an average particle diameter of 5.0 ⁇ m (manufactured by Sekisui Plastics Co., Ltd., refractive index 1.525). A paint was prepared. ⁇ Preparation of antiglare film> An antiglare film was produced in the same manner as in Example 1 except that the Meyer bar used in Example 1 was changed to # 10. The thickness of the obtained coating film was 5.6 ⁇ m.
- Luminous transmittance (transmission Y value) Murakami Color Research Laboratory “integrated sphere high-speed spectral transmission measurement system DOT-3” was used, and the measurement was carried out according to JISZ8722.
- S ( ⁇ ) spectral distribution at a wavelength of 400 to 700 nm
- y ( ⁇ ) color matching function
- T ( ⁇ ) spectral solid angle transmittance
- Y luminous transmittance.
- Glitter Each anti-glare film was layered on a liquid crystal display (LCD) having a resolution of 150 ppi that was displayed in green on the entire surface, and the degree of occurrence of glittering screen was visually evaluated.
- LCD liquid crystal display
- a clear type hard coat film which does not generate glare was previously set on the LCD surface. The case where there was no glare and the case where the glare was slight was designated as “ ⁇ ”, and the case where the glare was large and the visibility deteriorated was designated as “X”.
- White bokeh, whitish White bokeh due to reflection of external light is applied with a black vinyl tape (Nitto Vinyl Tape, PROSELF No. 21 (wide)) on the opposite side of the coating as black density using a Macbeth densitometer. It was measured. 2.15 or more is “ ⁇ ”, 2.10 or more and less than 2.15 is “ ⁇ ”, and less than 2.10 is “x”.
- the whitishness of the coating film due to transmitted light is that light diffuses in the film due to internal haze when the white fluorescent lamp is viewed through an anti-glare hard coat film with the coated surface facing the observer. The state in which the coating became whitish was visually evaluated. Those with no whiteness and slight whiteness were indicated with “ ⁇ ”, those with a slight whiteness were indicated with “ ⁇ ”, and those with a white coating film were indicated with “X”.
- the anti-glare property is obtained by reflecting 10 lines drawn at 1 mm width on the coated surface of the anti-glare hard coat film, with the coated surface facing the observer, and through the anti-glare hard coat film.
- the line width was viewed, the state in which the line width was blurred and difficult to see due to light scattering was visually evaluated. “ ⁇ ” indicates that the line width cannot be recognized, and “X” indicates that the line width can be recognized.
- the maximum cross-sectional height in the evaluation region of the surface of the antiglare hard coat film is 1.0 to 3.0 ⁇ m or less, and the average inclination angle is 1 degree or less.
- the image has good image sharpness, good luminous transmittance, glossiness, surface strength (pencil hardness) of the present invention, and also has glare, white blur, whitishness.
- An antiglare hard coat film with reduced thickness was obtained.
- the average particle diameter of the fine particles used in the antiglare hard coat layer, the blending amount thereof, the coating thickness of the antiglare hard coat layer, and the haze value of the antiglare hard coat film are respectively shown.
- Anti-glare hardware that is within the desired range of the invention, has good image clarity, luminous transmittance, glossiness, surface strength (pencil hardness), and suppresses glare, white blur, and whitishness A coated film was obtained.
- Comparative Examples 1 and 2 that contain fine particles, but the maximum cross-sectional height in the evaluation region of the surface of the antiglare hard coat film is outside the range of 1.0 to 3.0 ⁇ m. Further, an antiglare hard coat film having good luminous transmittance, image sharpness and glossiness and suppressing glare, white blur and whitishness could not be obtained. In Comparative Example 1 having a thin coating film thickness, haze was increased, and image sharpness, glossiness, glare, white blur, and whitishness were remarkably deteriorated.
- Comparative Example 3 in which the number of added parts of the fine particles is large, high anti-glare properties are exhibited by the fine particles protruding from the coating film, and the image sharpness is lowered and the glare, white blur, and whitish are strong. . Furthermore, Comparative Example 2 with a thick coating film and Comparative Example 4 with no fine particles added had high gloss and no antiglare property. Further, in Comparative Example 5 using fine particles having an average particle diameter larger than the desired range of the present invention, the maximum cross-sectional height and the average inclination angle were both within the range of the present invention, but the transmission sharpness value was The image sharpness of the present invention was not good.
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Abstract
Description
本発明の防眩ハードコートフィルムは、透明フィルム上に、微粒子および樹脂を含有する防眩ハードコート層を設けてなる防眩ハードコートフィルムであって、該防眩ハードコートフィルムの表面の評価領域内の高さの平均値をゼロ(零)としたときの、評価領域内の高さ最大値と評価領域内の高さ最小値との差で表わす最大断面高さが1.0~3.0μmであり、かつ該防眩ハードコートフィルム表面の凹凸の平均傾斜角が1度以下であることを特徴としている。
断面曲線=うねり曲線+粗さ曲線
の関係がある。従って、本発明における「最大断面高さ」は、「表面うねり成分」を含む断面曲線を評価している。なお、2001年版のJISでは、最大断面高さは記号「Pt」で表す。
また、上記平均傾斜角が1度よりも大きい(1度超)場合、表面の凹凸に起因する光の屈折、散乱が強まるため表面ヘイズが発現し易くなり、光の屈折、散乱による光のロスにより透過率の低下が懸念されるとともに、防眩ハードコート層表面での散乱光による防眩性は得られ易くなるが、防眩ハードコートフィルムが白っぽく濁る現象を抑えられ難くなることから透明性や透過鮮明度が低下しやすいという問題がある。
また、防眩ハードコートフィルムの表面の上記平均傾斜角は1度以下であることが好ましく、より好ましくは上記平均傾斜角が0.9度であり、更に好ましくは上記平均傾斜角が0.7度以下である。上記平均傾斜角の下限値については特に制約はないが、防眩性の観点から、0.1度以上であることが好ましい。
なお、本発明において、「評価領域」とは測定領域のことである。
一方塗膜厚さが防眩ハードコート層を構成する微粒子の平均粒径の1.5倍を超えると防眩性が全く得られなくなる。なお、前記微粒子の平均粒径は、例えばレーザー回折散乱法で測定することができる。
また、微粒子の平均粒径が4.8μmよりも大きい場合は、防眩ハードコート層の塗膜厚さを前記微粒子の平均粒径の0.5~1.5倍と設定した場合に必要以上の防眩性が付与され塗膜表面での外光の散乱が大きくなり、光の散乱により表面が白っぽくなり、ディスプレイの視認性を著しく低下させる。一方、微粒子の平均粒径が1.0μmより小さい場合は塗膜厚さを薄くしなければならないため、ハード性に欠ける。
微粒子の配合量が、前記樹脂100重量部に対して0.05重量部未満の場合は、防眩ハードコート層の塗膜厚さを微粒子の平均粒径の0.5~1.5倍と設定した場合に防眩性が全く得られない。また、微粒子の配合量が、前記樹脂100重量部に対して3重量部を超えるとヘイズ値が高くなり透過率、コントラストが低下する。
なお、微粒子の平均粒径は、レーザー回折粒度測定器SALD2200(島津製作所製)で測定した。塗膜厚さは、キーエンス(株)製の走査型電子顕微鏡にて断面を観察し、計測した。また、特に断らない限り、以下に記載する「部」及び「%」は、それぞれ「重量部」及び「重量%」を表す。
<塗料調製>
トルエン70.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径2.0μm、屈折率:1.525)0.09gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)27.45gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.50g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
Fuji TAC(トリアセチルセルロースフィルム、富士フィルム(株)社製)に上記塗料をマイヤーバー#4(RDS社製)で塗工し、80℃で1分間乾燥後、350mJ/cm2の紫外線(光源:Fusion Japan社製UVランプ)を照射し硬化した。得られた塗膜の厚さは1.6μmであった。
<塗料調製>
実施例1で用いたアクリル─スチレン共重合粒子をメラミン樹脂─シリカ複合粒子(日産化学工業(株)社製、平均粒子径2.0μm、屈折率1.650)に変更した以外は実施例1と同様の方法で塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.6μmであった。
<塗料調製>
トルエン80.00gにアクリル粒子(綜研化学(株)社製、平均粒径1.5μm、屈折率:1.49)0.02gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(東洋インキ製造(株)社製、屈折率:1.49)18.02gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.00g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.2μmであった。
<塗料調製>
実施例1で用いたアクリル─スチレン共重合粒子を平均粒子径3.0μmの粒子(積水化成品工業(株)社製、屈折率1.525)に変更した以外は実施例1と同様の方法で塗料を調製した。
<防眩フィルム作製>
実施例1で用いたマイヤーバーを#5に変更した以外は実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは3.4μmであった。
<塗料調製>
トルエン70.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径2.0μm、屈折率:1.525)0.75gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)26.79gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.50g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.6μmであった。
<塗料調製>
トルエン70.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径2.0μm、屈折率:1.525)0.02gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)27.52gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.50g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.6μmであった。
<塗料調製>
トルエン45.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径4.0μm、屈折率:1.525)0.17gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)51.12gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)2.75g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは3.6μmであった。
<塗料調製>
酢酸ブチル65.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径3.3μm、屈折率:1.525)0.18gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)32.50gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.75g、BYK325(レベリング剤、ビックケミー(株)社製)0.57gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1で用いたマイヤーバーを#6に変更した以外は実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは2.9μmであった。
<塗料調製>
酢酸ブチル60.0gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径4.8μm、屈折率:1.525)0.20gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)37.22gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)2.00g、BYK325(レベリング剤、ビックケミー(株)社製)0.58gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1で用いたマイヤーバーを#8に変更した以外は実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは4.3μmであった。
<塗料調製>
トルエン82.00gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒径3.0μm、屈折率:1.525)0.18gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)15.96gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)0.90g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.2μmであった。
<塗料調製>
トルエン52.5gにアクリル─スチレン共重合粒子(積水化成品工業(株)社製、平均粒子径3.0μm 屈折率1.525)0.48gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)43.69gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)2.38g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1で用いたマイヤーバーを#6に変更した以外は実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは6.9μmであった。
<塗料調製>
トルエン70.0gにアクリル─スチレン粒子(積水化成品工業(株)社製、平均粒径2.0μm、屈折率:1.525)3.00gを添加し十分攪拌した。この液にアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.52)24.54gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.50g、BYK325(レベリング剤、ビックケミー(株)社製)0.96gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは1.8μmであった。
<塗料調製>
トルエン60.0gにアクリル系紫外線硬化樹脂(日本合成化学工業(株)社製、屈折率:1.520)33.0gとイルガキュア184(光重合開始剤、(株)チバスペシャリティーケミカル社製)1.50g、BYK325(レベリング剤、ビックケミー(株)社製)0.50gを添加し十分攪拌し塗料を調製した。
<防眩フィルム作製>
実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは3.4μmであった。
<塗料調製>
実施例1で用いたアクリル─スチレン共重合粒子を平均粒子径5.0μmの粒子(積水化成品工業(株)社製、屈折率1.525)に変更した以外は実施例1と同様の方法で塗料を調製した。
<防眩フィルム作製>
実施例1で用いたマイヤーバーを#10に変更した以外は実施例1と同様の方法で防眩フィルムを作製した。得られた塗膜の厚さは5.6μmであった。
(株)菱化システム製の三次元表面粗計「VertScan2.0」を用いて測定した。測定により得られた領域断面曲線パラメータの評価領域内の高さの平均値(Ave)がゼロのときの、評価領域内の高さ最大値(P)と評価領域内の高さ最小値(V)との差から最大断面高さ(Pt)を求めた。測定条件の設定は以下のとおりである。
<光学条件>
Camera:SONY HR-50 1/3型
Objective:10×(10倍)
Tube:1×Body
Relay:No Relay
Filter:530white
※光量調節:Lampの値が50~95の範囲内に入るよう自動で実施。
<測定条件>
Mode:Wave
Size:640×480
Range(μm):Start(5)、Stop(-10)
(株)菱化システム製の三次元表面粗計「VertScan2.0」を用いて、フィルム表面の凹凸部の平均傾斜角を測定した。
(3)ヘイズ値
村上色彩技術研究所製ヘイズメーター「HM150」を用いて測定した。
村上色彩技術研究所製「積分球高速分光透過測定システムDOT-3」を用い、JISZ8722に順ずる方法にて測定を実施した。
ここで視感透過率とは、Y=K∫S(λ)y(λ)T(λ)dλから求められる。なお、S(λ):波長400~700nmの分光分布、y(λ):等色関数、T(λ):分光立体角透過率、Y:視感透過率である。
スガ試験機(株)製写像性測定器「ICM-1DP」を使用し測定を実施した。測定は2mm、1mm、0.5mm、0.125mmの巾をもつ光学櫛を用いて行い、各巾における測定値とその総和を算出した。
(6)光沢度(20度、60度)
村上色彩技術研究所製グロスメーター(GM-3D)を使用し、塗工反対面に黒色のビニールテープ(日東ビニールテープ、PROSELFNo.21(幅広))を貼り20度または、60度光沢度を測定した。
新東科学(株)製HEIDON14を使用し、JIS K 5400に準拠して実施した。
(8)ギラツキ
全面緑色表示させた解像度150ppiの液晶表示体(LCD)の上に各防眩フィルムを重ね、画面のキラキラ光る輝きの発生度合いを目視で評価した。なお、LCD表面には予めギラツキの発生しないクリアタイプのハードコートフィルムを設置した。ギラツキがないもの及びギラツキがわずかであるものを「○」、ギラツキが大きく視認性が悪化するものを「×」とした。
外光の写り込みによる白ボケは、塗工反対面に黒色のビニールテープ(日東ビニールテープ、PROSELFNo.21(幅広))を貼りマクベス濃度計で黒濃度として測定した。2.15以上を「○」、2.10以上2.15未満を「△」、2.10未満を「×」とした。また、透過光による塗膜の白っぽさは、塗工面を観測者側にして防眩ハードコートフィルムを介して、白色蛍光灯を見たときの、内部ヘイズによりフィルム中で光が拡散し塗膜が白っぽくなる状態を目視で評価した。白っぽさがないもの及びわずかなものを「○」、白っぽさが若干強いものを「△」、塗膜が白っぽくなるものを「×」とした。
防眩性は幅1mm間隔で直線を10本引いたものを防眩ハードコートフィルムの塗工面に写り込ませ、塗工面を観測者側にして防眩ハードコートフィルムを介して線幅を見たときの、光の散乱により線幅がぼやけて見え難くなる状態を目視で評価した。線幅を認識できないものを「○」、線幅を認識できるものを「×」とした。
また、実施例1~9はいずれも、防眩ハードコート層に用いる微粒子の平均粒径、その配合量、防眩ハードコート層の塗膜厚さ及び防眩ハードコートフィルムのヘイズ値がそれぞれ本発明の所望の範囲内であり、良好な像鮮明度、視感透過率、光沢度、表面強度(鉛筆硬度)を有し、なお且つギラツキ、白ボケ、白っぽさを抑制した防眩ハードコートフィルムが得られた。
また、微粒子の添加部数の多い比較例3では、塗膜から微粒子が突出することにより高い防眩性が発現し、像鮮明度の低下と、ギラツキ、白ボケ、白っぽさが強くなった。さらに、塗膜厚さの厚い比較例2および微粒子が無添加である比較例4は光沢度が高く防眩性が得られなかった。また、平均粒径が本発明の所望の範囲よりも大きな微粒子を用いた比較例5では、最大断面高さと平均傾斜角はいずれも本発明の範囲内であったが、透過鮮明度の値が低く本発明の良好な像鮮明度が得られなかった。
Claims (7)
- 透明フィルム上に、微粒子および樹脂を含有する防眩ハードコート層を設けてなる防眩ハードコートフィルムであって、該防眩ハードコートフィルムの表面の評価領域内の高さの平均値をゼロ(零)としたときの、評価領域内の高さ最大値と評価領域内の高さ最小値との差で表わす最大断面高さが1.0~3.0μmであり、かつ該防眩ハードコートフィルム表面の凹凸の平均傾斜角が1度以下であり、JIS K 7105-1981に基づく透過鮮明度測定装置を用いて4つの光学櫛(巾2mm、1mm、0.5mm、0.125mm)を通して測定される透過鮮明度の合計値が280%以上であり、各光学櫛を通して測定される透過鮮明度の値が各々70%以上であることを特徴とする防眩ハードコートフィルム。
- 前記微粒子は平均粒径1.0~4.8μmであり、且つ前記防眩ハードコート層の塗膜厚さが前記微粒子の平均粒径の0.5~1.5倍であることを特徴とする請求項1に記載の防眩ハードコートフィルム。
- 前記微粒子は平均粒径が3.0~4.8μmであることを特徴とする請求項1又は2に記載の防眩ハードコートフィルム。
- 前記微粒子の配合量が前記樹脂100重量部に対して0.05~3重量部であることを特徴とする請求項1乃至3のいずれか一項に記載の防眩ハードコートフィルム。
- 前記防眩ハードコートフィルムのヘイズ値が0.1~5.0%で、60度鏡面光沢度が70%以上95%以下で、かつ20度鏡面光沢度が30%以上90%以下で、さらに視感透過率(透過Y値)が92.00以上であることを特徴とする請求項1乃至4のいずれか一項に記載の防眩ハードコートフィルム。
- 前記防眩ハードコート層に含まれる前記樹脂が電離放射線硬化型樹脂であることを特徴とする請求項1乃至5のいずれか一項に記載の防眩ハードコートフィルム。
- 前記透明フィルムがトリアセチルセルロースフィルム、ポリエチレンテレフタレートフィルム、又はノルボルネンフィルムであることを特徴とする請求項1乃至6のいずれか一項に記載の防眩ハードコートフィルム。
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KR (1) | KR102056953B1 (ja) |
CN (1) | CN104115039B (ja) |
WO (1) | WO2013047626A1 (ja) |
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WO2016208785A1 (ko) * | 2015-06-24 | 2016-12-29 | 삼성전자 주식회사 | 표시 장치용 하드코팅 필름 및 이를 포함하는 표시 장치 |
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JP6743305B2 (ja) | 2017-08-04 | 2020-08-19 | 株式会社ダイセル | 防眩フィルム |
WO2019107924A1 (ko) * | 2017-11-28 | 2019-06-06 | 주식회사 엘지화학 | 디스플레이 패널용 시인성 개선 필름 및 이를 포함하는 디스플레이 장치 |
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JP7326734B2 (ja) * | 2018-12-10 | 2023-08-16 | 大日本印刷株式会社 | 光学積層体、該光学積層体の製造方法、積層部材及び表示装置 |
JP2020098239A (ja) * | 2018-12-17 | 2020-06-25 | 大日本印刷株式会社 | 樹脂シート及びそれを用いた画像表示装置、並びに転写シート |
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CN104311751B (zh) * | 2014-09-28 | 2017-04-12 | 上海乘鹰新材料有限公司 | 用于疏水材料的表面亲水改性剂的制备方法 |
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KR102056953B1 (ko) | 2019-12-17 |
CN104115039B (zh) | 2017-07-11 |
JP5653378B2 (ja) | 2015-01-14 |
JP2013083914A (ja) | 2013-05-09 |
JP2014038362A (ja) | 2014-02-27 |
KR20140111641A (ko) | 2014-09-19 |
US20140254020A1 (en) | 2014-09-11 |
US9684098B2 (en) | 2017-06-20 |
CN104115039A (zh) | 2014-10-22 |
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