JP2002060526A - Hard coated film and hard coated film with functional film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hard coated film having a pencil hardness of >=4 H by coating on a surface(s) with a hard coating layer(s) with high scratch resistance, surface hardness and transparency. SOLUTION: This hard coated film is obtained by coating at least one side of a transparent base film with a hard coating layer consisting mainly of an active energy ray-polymerizable resin; wherein the hard coating layer contains inorganic microparticles each >=1.5 in the ratio of the major axis to the minor axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an excellent scratch resistance,
The present invention relates to a hard coat film having surface hardness. More specifically, the present invention relates to a hard coat film having a transparent resin film having a cured resin layer by active energy rays. The present invention further relates to a hard-coated film having a surface having functions of an anti-reflection, an ultraviolet / infrared absorption, a selective wavelength absorption layer, an electromagnetic wave shielding layer and an antifouling layer. Furthermore, the present invention relates to an image display device provided with these hard coat films on the surface.

[0002]

2. Description of the Related Art In recent years, plastic products have been replaced by glass products from the viewpoint of workability and weight reduction. However, since the surfaces of these plastic products are easily damaged, a hard coat film is applied for the purpose of imparting scratch resistance. Often used together. Also, for conventional glass products,
A plastic film is often bonded to prevent scattering, but due to insufficient hardness of the film surface, a hard coat layer is widely formed on the surface.

Conventional hard coat films are usually prepared by coating an active energy ray-polymerizable resin such as a thermosetting resin or an ultraviolet curing resin directly on a plastic substrate film or via a primer layer of about 1 μm. Fifteen
It is manufactured by coating and curing to a thickness of about μm.

[0004] However, the conventional hard coat film has insufficient hardness as a hard coat layer and has a thin coating film thickness.
When the underlying plastic substrate film is deformed, the hard coat layer is also deformed accordingly, and the hardness of the hard coat film as a whole is lowered, so that it is not sufficiently satisfactory. For example, in the case of a hard coat film in which an ultraviolet curable paint is applied to the above-mentioned thickness on a polyethylene terephthalate film widely used as a plastic base film, a pencil hardness of 3H is generally used, and a glass pencil is used. This is far below the hardness of 9H.

[0005] On the other hand, even if the hardness is insufficient, if the thickness of the hard coat layer is simply made thicker than the usual thickness of 3 to 15 µm, the hardness of the obtained hard coat film is improved, but cracking of the hard coat layer and At the same time, there is a problem that peeling is likely to occur and curling of the hard coat film due to curing shrinkage increases. For this reason, it has been difficult to obtain a hard coat film having good characteristics that can be practically used by the conventional technique.

A coating composition containing a polyfunctional acrylate monomer as a resin-forming component of the hard coat layer, and a powdered inorganic filler such as alumina, silica, titanium oxide or the like and a polymerization initiator is also known. Patent No. 18151
No. 16 discloses this. Also, a photopolymerizable composition containing an inorganic filler material made of silica or alumina surface-treated with alkoxysilane or the like is disclosed in Japanese Patent No. 14162.
Although it is disclosed in Japanese Patent Publication No. 40, it is not satisfactory with respect to the surface hardness of a hard coat recently required. Japanese Patent Application Laid-Open No. 2000-52472 proposes a method of satisfying curl and scratch resistance by forming a hard coat layer into two layers and adding fine particle silica to the first layer, but a sufficient effect cannot be obtained. Was.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hard coat film having high hardness. Still another object of the present invention is to provide an antireflection transparent conductive layer laminated film and an image display device using the same.

Means for Solving the Problems The inventors of the present invention have made it possible to increase the hardness of a hard coat film by filling inorganic fine particles having a specific structure in a hard coat layer and to reduce the crosslinking shrinkage. Thus, they found that the flatness of the coating film was improved, and based on these findings, the present invention was accomplished. That is, the present invention provides (1) at least one hard coat layer coated on at least one surface of a transparent substrate film, and the hard coat layer has inorganic fine particles having a major axis / minor axis ratio of 1.5 or more on average. (Hereinafter referred to as high aspect ratio inorganic particles). (2) At least one layer of the hard coat layer is characterized in that:
The hard coat film according to item (1), which is a layer mainly composed of a polymerizable resin crosslinked by active energy rays, and (3) the total number of inorganic fine particles contained in the hard coat layer. (1) or (2), wherein 10% or more of the high aspect ratio inorganic particles are the inorganic particles.
(4) The hard coat film according to any one of (1) to (3), wherein the high aspect ratio inorganic particles have a long axis / short axis ratio of 2 to 20 on average. (5) At least one kind of inorganic fine particles contained in the hard coat layer comprises at least one kind of aluminum oxide, silicon dioxide, titanium dioxide or zirconium oxide (1). The hard coat film according to any one of (1) to (4), (6) at least one of the inorganic fine particles contained in the hard coat layer comprises aluminum oxide. (7) The hard coat film according to any one of (1) to (6), wherein the inorganic fine particles contained in the hard coat layer are surface-treated. A hard conductive film according to any one of (8) and (1) to a hard conductive film according to any one of (1) to (7), wherein a transparent conductive layer and the transparent conductive layer are provided on the hard coat layer. And (9) an anti-reflection transparent conductive laminated film characterized by laminating a transparent coating layer having a different refractive index and an antifouling layer as the outermost layer; The present invention also provides an image display device provided with the hard coat film described in any one of the above items or the antireflection transparent conductive laminated film described in the item (8).

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As the high aspect ratio inorganic particles and other inorganic fine particles used in the present invention, those having high hardness are preferable, and inorganic oxide particles having Mohs hardness of 6 or more are preferable. For example, silicon dioxide particles, titanium dioxide particles, zirconium oxide particles, and aluminum oxide particles are used, and preferably, aluminum oxide particles are used. In the present invention, various types may be used in combination. The average particle diameter of the inorganic fine particles used in the present invention is 1
２０００2000 nm, preferably 2 to 1000 n
m, more preferably 5 to 500 nm, and most preferably 10 to 200 nm. Particles with too large a particle size have the disadvantage of increasing haze. The average particle diameter described in the present invention is a particle diameter represented by the diameter of a circle having the same area as the projected area of each particle.

The shape of the inorganic fine particles used in the present invention is as follows.
It is preferably a rod, a needle, an ellipsoid, a cylinder, a plate, or a rectangular parallelepiped. Many of the particles are observed as rectangles when projected, and in the present invention, the average value (aspect ratio) obtained by dividing the long axis of the projected form by the short axis is 1.5 or more, preferably 2 or more and 20 or less. More preferably, inorganic particles having a high aspect ratio of 3 or more and 20 or less are used. Furthermore, in the present invention, such high aspect ratio inorganic particles are preferably used at a content of 10% or more, preferably 15% or more, based on the total number of inorganic fine particles contained in the hard coat layer. More preferred. The shape of the inorganic fine particles used in the present invention, for example,
It can be observed from a photograph taken at a magnification of 50,000 or more with a transmission electron microscope. For more accurate shape determination, the photograph should be
The measurement can be performed by measuring the minor axis and the major axis of each particle by doubling the size and determining the axial length ratio. The high aspect ratio inorganic particles used in the present invention have a higher interaction between the fine particles than fine particles having an aspect ratio of less than 1.5 (for example, spherical fine particles), amorphous fine particles, and the like. Even with the amount, a hard coat layer having higher hardness can be formed.

Examples of the high aspect ratio inorganic particles applicable to the present invention include, for example, alumina fine particles AKP-G015 and AKP-G008 manufactured by Sumitomo Chemical Co., Ltd., and titanium oxide particles MT-100S manufactured by Teika Co., Ltd. In each case, trade names) can be used. The addition amount of all the inorganic fine particles used in the present invention is preferably 1 to 99% by mass, more preferably 10 to 90% by mass, and more preferably 15 to 80% by mass of the total amount of the hard coat layer. Is more preferable, and most preferably 20 to 60% by mass.

In general, inorganic fine particles have a poor affinity for a binder polymer (a polymer containing a polyfunctional monomer component), so that simply mixing the two easily breaks the interface, cracks the film, and improves the scratch resistance. It is difficult. In the present invention, in order to improve the affinity between the inorganic fine particles and the binder polymer, the surface of the inorganic fine particles used in the present invention can be treated with a surface modifier containing an organic segment. The surface modifier forms a bond with the inorganic fine particles on the one hand and has a high affinity with the binder polymer on the other hand. Therefore, the surface modifier preferably has a functional group capable of forming a bond with a metal, for example, metal alkoxide compounds such as silane, aluminum, titanium, and zirconium, and phosphoric acid, sulfonic acid, and carboxylic acid groups. Compounds having an anionic group such as Further, it is preferable that the surface modifier is chemically bonded to the binder polymer, and that a vinylic polymer group or the like is introduced into a terminal is suitable. For example, when a binder polymer synthesized from a monomer having an ethylenically unsaturated group as a polymerizable group and a crosslinkable group is used, as a surface modifier, a metal alkoxide compound or an anionic compound has an ethylenically unsaturated group at the terminal. Are preferred.

The following are typical examples of these surface modifiers.
Coupling agent containing saturated double bond, phosphoric acid, sulfone
Acids, carboxylic acids and the like. S-1H_TwoC = C (X) COOC_ThreeH₆Si (OC
H_Three)_Three  S-2H_TwoC = C (X) COOC_TwoH_FourOti (OC_Two
H_Five)_Three  S-3H_TwoC = C (X) COOC_TwoH_FourOCOC_FiveH_Ten
OPO (OH)_Two  S-4 (H_TwoC = C (X) COOC_TwoH_FourOCOC_FiveH
_TenO)_TwoPOOH S-5H_TwoC = C (X) COOC_TwoH_FourOSO_ThreeH S-6 H_TwoC = C (X) COO (C_FiveH_TenCOO)_Two
H S-7 H_TwoC = C (X) COOC_FiveH_TenCOOH (X = H or CH_ThreeRepresents)

The surface treatment of the inorganic fine particles is preferably performed in a solution. When the fine particles are mechanically finely dispersed, the surface modifier is present together, or after the fine particles are finely dispersed, the surface modifier is added and stirred,
Further, a method may be used in which surface modification is performed before finely dispersing the fine particles (if necessary, heating or drying is followed by heating or pH change), and then fine dispersion is performed.
As the solution for dissolving the surface modifier, a highly polar organic solvent is preferable. Specific examples include known solvents such as alcohols, ketones, and esters. Examples of the fine particle disperser used in the present invention include an ultrasonic wave, a disper,
It is preferable to use a homogenizer, dissolver, polytron, paint shaker, sand grinder, kneader, Eiger mill, Dyno mill, Koball mill, or the like. As the dispersion medium, the above-mentioned solvent for surface modification is preferably used.

The resin of the hard coat layer used in the present invention is not particularly limited, and a known curable resin can be used. Examples thereof include a thermosetting resin and an active energy ray polymerizable resin. Resins are preferred. As the thermosetting resin, there is a resin utilizing a crosslinking reaction of a prepolymer such as a melamine resin, a urethane resin, and an epoxy resin.

Hereinafter, the active energy ray polymerizable resin will be described in more detail. Radiation, gamma rays, alpha rays, electron beams, ultraviolet rays and the like can be used as the active energy rays, and ultraviolet rays are preferably used. In the present invention, the active energy ray-polymerizable resin used as a main component of the hard coat layer also includes an active energy ray-curable polymer that is crosslinked by active energy rays. Polymerizable resin cross-linked by such active energy rays,
It preferably accounts for 5 to 95% by mass of the total mass of the hard coat layer, and more preferably 20 to 90% by mass. An active energy ray polymerizable resin layer containing such a cross-linked polymer is coated with a coating solution containing a polyfunctional monomer and a polymerization initiator on the transparent substrate film, and the polyfunctional monomer is irradiated with the active energy ray. It can be formed by polymerizing.

The functional group of the monomer used in the present invention is preferably a polymerizable unsaturated double bond. Examples of the polymerizable unsaturated double bond include an acrylate group, a methacrylate group, and a vinyl group. An acrylate group is preferably used from the viewpoint of reactivity.

Specific examples of the above polyfunctional monomer include ethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra ( Polyol polyacrylates such as (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, di (meth) acrylate of bisphenol A diglycidyl ether, di (meth) of hexanediol diglycidyl ether Obtained by the reaction of epoxy acrylates such as acrylates and polyisocyanates with hydroxyl-containing acrylates such as hydroxyethyl (meth) acrylate Mention may be made of a urethane acrylate, and the like.

In the present invention, a monofunctional monomer may be used in combination with the above polyfunctional monomer, if necessary, for adjusting the elastic modulus, improving the adhesion, and the like. Monofunctional monomers, methyl (meth) acrylate, alkyl ester of acrylic acid such as butyl (meth) acrylate, hydroxyethyl (meth) acrylate, acrylate ester containing a polar group such as dimethylaminoethyl (meth) acrylate, Existing monomers such as acrylamide, styrene, vinyl acetate, maleic anhydride, acrylic acid and the like can be mentioned.

The monomer used in the present invention is preferably a monomer having five or more functionalities such as dipentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate. For flexibility, ethylene glycol di (meth) acrylate,
It is also preferable to appropriately use a monomer having less than pentafunctionality such as trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, and pentaerythritol tetra (meth) acrylate.

Examples of the photopolymerization initiator used in the present invention include acetophenones, benzophenones, Michler's ketone, benzoylbenzoate, benzoin, α
-Asiloxime esters, tetramethylthiuram monosulfide, thioxanthone and the like. In addition to such a photopolymerization initiator, a photosensitizer may be used.
Examples of the photosensitizer include n-butylamine, triethylamine, tri-n-butylphosphine, thioxanthone, and the like. In the present invention, the photopolymerization initiator is preferably used in a range of 0.1 to 15 parts by mass, more preferably in a range of 1 to 10 parts by mass, based on 100 parts by mass of the polyfunctional monomer. .

The active energy ray polymerizable resin coating solution used in the present invention is prepared by dissolving the above-mentioned polyfunctional monomer and polymerization initiator mainly in an organic solvent such as a ketone, alcohol or ester. Further, the dispersion is prepared by adding a surface-modified inorganic fine particle dispersion.

The transparent substrate used in the present invention is a plastic film in the form of a film, and is preferably a film such as polyester such as polyethylene terephthalate and polyethylene naphthalate, and a cellulose resin such as polycarbonate, triacetyl cellulose and diacetyl cellulose. The thickness of the film is preferably from 20 to 500 μm, and if it is too thin, the film strength is weak, and if it is too thick, the stiffness becomes too large, and more preferably from 80 to 200 μm.

The hard coat film of the present invention is, for example, a dipping method, a spinner method, a spray method, a roll coater method, a gravure method, a wire bar method, or the like, on which the active energy ray-curable resin coating material is coated on the transparent substrate film. Formed into a film using a known thin film forming method, dried,
It can be manufactured by irradiating the active energy ray. In the present invention, the thickness of the hard coat layer is preferably 1 to 50 μm, more preferably 5 to 30 μm.

Further, in the present invention, for the purpose of improving the adhesion of the hard coat layer to the transparent substrate, if necessary, one or both surfaces of the hard coat layer may be subjected to a surface treatment by an oxidation method or a roughening method. Can be. As the oxidation method,
For example, a corona discharge treatment, a glow discharge treatment, a chromic acid treatment (wet method), a flame treatment, a hot air treatment, an ozone / ultraviolet irradiation treatment and the like can be mentioned. Further, one or more undercoat layers can be provided between the transparent substrate and the hard coat layer. Examples of the material of the undercoat layer include copolymers or latexes of vinyl chloride, vinylidene chloride, butadiene, (meth) acrylate, vinyl ester, etc., low molecular weight polyester,
Examples include water-soluble polymers such as gelatin.

In the present invention, the hard coat layer may be composed of a plurality of layers, and may be formed by appropriately laminating layers having different filling rates of inorganic fine particles in the order of hardness.

On these prepared hard coat layers,
A film having functions such as an ordinary antireflection layer, an ultraviolet / infrared absorbing layer, a selective wavelength absorbing layer, an electromagnetic wave shielding layer and an antifouling layer can be provided, and is provided as a high-hardness functional film. These functional films can be produced by applying a solution of a known material, or by vacuum film formation such as sputtering or vapor deposition. Examples of the transparent conductive layer, the transparent coating layer and the antifouling layer used in the antireflection transparent conductive layer laminated film of the present invention include, for example, JP-A-1-164991, JP-A-4-338901, and JP-A-3-903.
No. 45, and the like, and preferable ranges such as surface resistivity, average reflectance, and antifouling property are the same as those described in the publication.

The hard coat film and the antireflection transparent conductive layer laminated film of the present invention are used for a cathode ray tube display (CR).
T), liquid crystal display (LCD), plasma display panel (PDP), display such as field emission display (FED), touch panel for home electric appliances and the like, and protective film such as glass.

[0028]

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited to these examples.

Example 1 (1-1) Preparation of Dispersion of Inorganic Fine Particles Only the type of inorganic fine particles was changed as shown in Table 1,
Dispersion was performed. The dispersion formulation is as follows. The following amounts of each reagent were weighed in a ceramic-coated vessel. Methyl isobutyl ketone 234 g Anionic functional group-containing surface treating agent S-6 (X = H) 36 g Inorganic fine particles (as shown in Table 1) 180 g Fine dispersion of the above mixture in a sand mill (1 / 4G sand mill) at 1600 rpm for 10 hours did. Media is 1
1400 g of zirconia beads having a diameter of mmΦ was used. After the dispersion, the beads were separated to obtain surface-treated inorganic fine particle dispersions.

(1-2) Preparation of Coating Solution for Active Energy Beam Cured Layer A mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate was added to 300 g of a 40% by mass dispersion of methylisobutylketone of each of the surface-treated inorganic fine particles described above. (Trade name DPHA, manufactured by Nippon Kayaku Co., Ltd.) 284 g and 329 methyl isobutyl ketone
g was added and dissolved. Further, 16.8 g of a photopolymerization initiator (trade name: Irgacure 184, manufactured by Ciba Geigy) was added and dissolved. After stirring the mixture for 30 minutes, the pore size is 1 μm
The mixture was filtered through a polypropylene filter to prepare each coating liquid for an active energy ray-curable layer.

(1-3) Preparation of Hard Coat Film After a glow discharge treatment was applied to a 188 μm polyethylene terephthalate film as a transparent substrate, each of the coating liquids for the active energy ray-cured layer mixed with the inorganic fine particle dispersion was dried. By applying and drying with a wire bar so that the film thickness becomes 10 μm, and irradiating with ultraviolet rays, a hard coat film sample on which an active energy ray cured layer was laminated was produced. That is, for both the sample of the present invention and the sample of the comparative example, samples were prepared in the same manner except that only the type of the inorganic fine particles was changed as shown in Table 1, and samples 101 to 110 were prepared.
Was prepared. Table 1 shows the sample contents and the evaluation results.
The average particle diameter of the inorganic fine particles used for each sample was 15 n for each of the samples 101 to 105, 107 and 108.
m, samples 106 and 110 are 21 nm each, sample 1
09 was 13 nm.

The hardness (pencil hardness) of the pencil scratch test is as follows:
After the prepared hard coat film sample was conditioned for 2 hours at a temperature of 25 ° C. and a relative humidity of 60%, JIS-S-6 was used.
JIS-K-5 using a test pencil specified in 006
According to the pencil hardness evaluation method specified by 400, scratching was repeated 10 times with a pencil of each hardness under a load of 1 kg, and the number of scratches at which no scratch was observed was represented.

[0033]

[Table 1]

From the results shown in Table 1, the ratio of the major axis / minor axis was 1.
Samples 101 to 101 of the present invention containing 5 or more inorganic fine particles
108 shows that the pencil hardness is remarkably improved as compared with Comparative Samples 109 and 110 having an average ratio of major axis / minor axis of less than 1.5.

[0035] Example 2 (silver-palladium Preparation of colloidal dispersion) 30% iron sulfate _{(II) FeSO 4 · 7H 2} O, 40% citric acid prepared, mixed and held at 20 ° C., to this stirring 10%
Silver nitrate and palladium nitrate (mixed at a molar ratio of 9/1) were added and mixed at a rate of 200 ml / min, and the resulting mixture was repeatedly washed with water by centrifugation.
Pure water was added so that the final concentration was 3% by mass to prepare a silver-palladium colloidal dispersion. As a result of observation by a transmission electron microscope (TEM), the particle size of the obtained silver colloid particles was about 9 to 12 nm. Emission spectrometer (ICP)
As a result, the ratio of silver to palladium was the same as the charging ratio of 9/1.

(Preparation of Silver Colloid Coating Solution) To 100 g of the above silver colloid dispersion solution, i-propyl alcohol was added, ultrasonically dispersed, and filtered through a polypropylene filter having a pore size of 1 μm to prepare a silver colloid coating solution.

(Preparation of Antireflection Layer Coating Solution) A mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (trade name: DPHA,
2 g of Nippon Kayaku Co., Ltd., 80 mg of a photopolymerization initiator (trade name: Irgacure 907, manufactured by Ciba Geigy) and 30 mg of photosensitizer (trade name: Kayacure DETX, manufactured by Nippon Kayaku Co., Ltd.) are methyl isopropyl ketone 38.
g, 38 g of 2-butanol, and 19 g of methanol. After the mixture was stirred for 30 minutes, the mixture was filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution for a low antireflection layer.

(Preparation of coating solution for antifouling layer) Thermally crosslinkable fluoropolymer (trade name: JN-7214, Nippon Synthetic Rubber)
Isopropyl alcohol was added to the mixture to prepare a 0.2% by mass crude dispersion. The coarse dispersion was further ultrasonically dispersed to prepare a coating solution for an antifouling layer.

(Formation of Antireflective Transparent Conductive Laminate) The same hard coat film samples 101 to 101 as those prepared in Example 1
After performing a corona treatment on each of the 110 active energy ray-cured layers, the silver colloid coating solution was applied using a wire bar so that the coating amount was 70 mg / m ² , and dried at 40 ° C. Water fed by a pump was sprayed on the silver colloid-coated surface, excess water was removed with an air knife, and a treatment was carried out for 5 minutes while transporting in a heating zone at 120 ° C. Next, the coating liquid for an anti-reflection layer was coated to a thickness of 80
It was applied to a thickness of nm, dried, and irradiated with ultraviolet rays. Furthermore, 5 mg of the coating solution for the antifouling layer was similarly
/ M ² and dried and heat-treated at 120 ° C. to prepare anti-reflection transparent conductive laminated film samples 201 to 210. That is, the samples 201 to 210 of the second embodiment are the anti-reflection transparent conductive laminated film samples using the hard coat film samples of the samples 101 to 110 of the first embodiment, respectively (the last two digits of the sample No.). Digit corresponds to the order).

The laminated film samples prepared in Example 2 were evaluated for surface electrical resistivity, average reflectance, and stain resistance. As a result, the surface electric resistivity was 2 for all samples.
00Ω / □, average reflectance was 0.8%, and antifouling property was ○. Further, the same laminated film was subjected to the same pencil hardness scratch test as in Example 1, and the results are shown in Table 2.

Each measurement was performed by the following method. (Evaluation method of anti-reflective transparent conductive laminated film) (1) Surface resistivity Measured value by 4-terminal surface resistivity meter (Mitsubishi Chemical Corporation, trade name "Loresta GP") (2) Average reflectance spectrum 450-65 using a photometer (manufactured by JASCO Corporation)
Average reflectance of specular reflection of incident light 5 ° in a wavelength region of 0 nm. (3) Antifouling property Evaluation of the state in which a fingerprint was attached to the film surface and wiped off using Toray's Toraysee (trade name) (○: fingerprint completely wiped off, ×: part of fingerprint) Remains without being wiped off).

[0042]

[Table 2]

From the results shown in Table 2, it can be seen that even a film sample in which a functional layer such as a transparent conductive layer is laminated on such a hard coat layer, the present invention 201 filled with the high aspect ratio inorganic particles defined in the present invention. It can be seen that Samples Nos. To 208 have better pencil scratch resistance than Comparative Samples 209 and 210 filled with so-called spherical fine particles.

[0044]

The hard coat film of the present invention has excellent surface mechanical strength (surface hardness), and the antireflective transparent conductive layer laminated film of the present invention obtained by laminating a functional film on this hard coat film has excellent surface hardness. Having. Furthermore, if these films are provided on the image display surface, an image display device having a protective layer having excellent surface hardness can be provided.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02B 1/10 C09D 4/02 // C09D 4/02 163/10 163/10 175/16 175/16 C08L 101: 00 C08L 101: 00 G02B 1/10 Z F term (reference) 2K009 AA15 CC03 CC09 CC24 CC42 DD02 EE03 EE05 4F006 AA02 AA35 AA36 AB43 AB74 AB76 BA02 CA05 CA08 DA04 4F100 AA00B AA00C AA19B AA19AAAAABA AAB21AAB21A AK01B AK01C AK25 AK42 AR00D AR00E BA02 BA03 BA05 BA06 BA10B BA10C BA10E CA23B CA23C DE01B DE01C EH46B EH46C GB41 JB14B JB14C JG01D JK01B JK01C JL06E JN01A JN01D JN01E JN06 YY00B YY00C 4J038 FA042 FA062 FA082 FA092 FA121 FA182 FA251 FA281 KA08 KA15 KA18 MA14 NA11 NA19 PA17 PB09 PC08

Claims (9)

[Claims] At least one hard coat layer is provided on at least one side of a transparent substrate film, and the hard coat layer has inorganic fine particles having a major axis / minor axis ratio of 1.5 or more on average. A hard coat film characterized by containing high aspect ratio inorganic particles). 2. The method according to claim 1, wherein at least one of the hard coat layers comprises
The hard coat film according to claim 1, wherein the hard coat film is a layer mainly composed of a polymerizable resin crosslinked by an active energy ray. 3. The hard coat film according to claim 1, wherein 10% or more of the total number of the inorganic fine particles contained in the hard coat layer is the high aspect ratio inorganic particles. 4. The high aspect ratio inorganic particle according to claim 1, wherein the long axis / short axis ratio is 2 to 20 on average.
4. The hard coat film according to any one of 3. 5. The method according to claim 1, wherein at least one kind of inorganic fine particles contained in said hard coat layer contains at least one kind of aluminum oxide, silicon dioxide, titanium dioxide or zirconium oxide. The hard coat film according to any one of the above. 6. The hard coat film according to claim 1, wherein at least one of the inorganic fine particles contained in the hard coat layer contains aluminum oxide. 7. The inorganic fine particles contained in the hard coat layer are surface-treated.
The hard coat film according to any one of the above. 8. A transparent conductive layer, a transparent coating layer having a refractive index different from that of the transparent conductive layer on the hard coat layer of the hard coat film according to any one of claims 1 to 7, An anti-reflective transparent conductive laminated film characterized by laminating an antifouling layer as an outermost layer. 9. An image comprising a hard coat film according to claim 1 or an antireflective transparent conductive laminated film according to claim 8 provided on an image display surface. Display device.