TW202235554A - Hard coat film including a base film and a hard coat layer - Google Patents

Abstract

The invention aims to provide a hard coat film with anti-virus and anti-glare properties. A hard coat film 1 comprises a base film 11 and a hard coat layer 12 disposed on at least one side of the base film 11. The hard coat layer 12 includes an antiviral agent and has a haze value more than 3.0% and less than 30%. The antiviral agent includes a Molybdenum compound. The hard coat film 1 includes the antiviral agent 0.01% to 30% by mass. The hard coat film 1 also includes additional filler.

Description

Hard Coating Film

The present invention relates to a hard coat film having antiviral properties.

In recent years, in various electronic devices, a touch panel having both a display device and an input means has been widely used. A hard coat film having a hard coat layer is often provided on the surface of the touch panel in order to prevent scratches.

By the way, the recent outbreak of the novel coronavirus (SARS-CoV-2) infection (COVID-19) has become a major problem in the world. When a virus is attached to the surface of the touch panel, if the surface of the touch panel is touched with a finger, the virus will enter the human body through the finger, and there is a risk of infection. Therefore, it is desired to impart antiviral properties to the surface of the touch panel.

Patent Document 1 and Patent Document 2 disclose antiviral nonwoven fabrics, knitted fabrics, sheets, etc., but application to optical applications is not considered. On the other hand, Patent Document 3 discloses an antiviral member intended to be applied to various uses. [Prior Art Literature] [Patent Document]

Patent Document 1: Patent No. 5577346. Patent Document 2: Patent No. 5614802. Patent Document 3: Patent No. 6145758.

[Problem to be solved by the invention]

The application targets of the antiviral member of Patent Document 3 include optical applications, but specific studies on the use on the outermost surfaces of display devices and the like are still insufficient.

On the other hand, in various displays including touch panels, light incident from the outside may be reflected, making display images difficult to see. Therefore, hard coat films are required to have anti-glare properties.

The present invention has been made in view of such actual conditions, and an object of the present invention is to provide a hard coat film having antiviral properties and antiglare properties. [means used to solve problems]

In order to achieve the above object, firstly, the present invention provides a hard coat film comprising a base film and a hard coat layer provided on at least one side of the base film, characterized in that , the hard coat layer contains an antiviral agent, and has a haze value of not less than 3.0% and not more than 30% (Invention 1).

The hard coat film of the above invention (Invention 1) has antiviral properties and can display high-definition images. image, and play anti-glare.

In the above invention (Invention 1), the antiviral agent is preferably a molybdenum compound (Invention 2).

In the above inventions (Inventions 1 and 2), the content of the antiviral agent in the hard coat layer is preferably not less than 0.01% by mass and not more than 30% by mass (Invention 3).

In the above inventions (Inventions 1 to 3), it is preferable that the hard coat layer contains a filler other than the antiviral agent (Invention 4).

In the above inventions (Inventions 1 to 4), the total light transmittance is preferably 80% or more (Invention 5).

In the above inventions (Inventions 1 to 5), the total value of the image sharpness of optical combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm is preferably 200 or more and 480 or less (Invention 6 ).

In the above inventions (Inventions 1 to 6), the pencil hardness of the surface on the hard coat layer side is preferably F or higher (Invention 7).

In the above inventions (Inventions 1 to 7), the thickness of the hard coat layer is preferably not less than 0.5 μm and not more than 20 μm (Invention 8).

The hard coat film of the above inventions (Inventions 1 to 8) is preferably for optical use (Invention 9). [Efficacy of the invention]

The hard coat film of the present invention has antiviral properties and antiglare properties.

[Mode for Carrying Out the Invention]

Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view of a hard coat film according to an embodiment of the present invention. The hard coat film 1 according to one embodiment of the present invention includes a base film 11 and a hard coat layer 12 provided on at least one surface side of the base film 11 . Preferably, the hard coat layer 12 contains an antiviral agent, and the haze value of the hard coat film 1 is not less than 3.0% and not more than 30%. In addition, the measuring method of the haze value is as shown in the test example mentioned later.

With regard to the hard coat film 1 of this embodiment, since the hard coat layer 12 contains an antiviral agent, it becomes what has an antiviral property. Moreover, when the haze value of the hard coat film 1 is 3.0% or more, antiglare property can be exhibited. On the other hand, since the haze value of the hard coat film 1 is 30% or less, high-definition images can be displayed when applied to a display body (display). image. In addition, the antiviral agent contained in the hard coat layer 12 also has the effect of increasing the haze value.

From the viewpoint of anti-glare properties, the haze value of the hard coat film 1 is preferably at least 4.0%, more preferably at least 6.0%, particularly preferably at least 8.0%, and still more preferably at least 10.0%. In addition, from the image. From the viewpoint of high definition of images, the haze value of the hard coat film 1 is preferably 25% or less, more preferably 20% or less, particularly preferably 17% or less, and even more preferably 14% or less.

1. Each component 1-1. Hard coating layer With regard to the hard coat layer 12 of the hard coat film 1 of this embodiment, high surface hardness is provided to the hard coat film 1, and it becomes what is excellent in scratch resistance. The hard coat layer 12 contains an antiviral agent and is not particularly limited as long as the haze value of the hard coat film 1 becomes the above-mentioned value.

The hard coat layer 12 of this embodiment is preferably cured with a hard coat layer composition (hereinafter also referred to as "hard coat layer composition C") containing an active energy ray curable component and an antiviral agent. .

(1) Ingredients (1-1) Active energy ray hardening ingredients The active energy ray-curing component is preferably one that is cured by irradiation of active energy rays and that does not inhibit the antiviral action of the antiviral agent.

As specific active energy ray-curable components, polyfunctional (meth)acrylate-based monomers, (meth)acrylate-based prepolymers, active energy ray-curable polymers, and the like are preferably exemplified. Among them, polyfunctional (meth)acrylate monomers or (meth)acrylate prepolymers are more preferable. The polyfunctional (meth)acrylate monomer and the (meth)acrylate prepolymer may be used alone or in combination. In addition, in this specification, a (meth)acrylate means both an acrylate and a methacrylate. The same applies to other similar terms.

Examples of polyfunctional (meth)acrylate monomers include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, new Pentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, hydroxypivalate neopentyl glycol di(meth)acrylate, dicyclopentyl di(meth)acrylate , caprolactone modified dicyclopentenyl di(meth)acrylate, ethylene oxide modified phosphate di(meth)acrylate, allylated cyclohexyl di(meth)acrylate, isocyanate Urate di(meth)acrylate, trimethylolpropane tri(meth)acrylate, diperythritol tri(meth)acrylate, propionic acid modified diperythritol tri(meth)acrylate ) acrylate, neopentylthritol tri(meth)acrylate, propylene oxide modified trimethylolpropane tri(meth)acrylate, ginseng (acryloxyethyl) isocyanurate, propane Acid-modified diperythritol penta(meth)acrylate, diperythritol hexa(meth)acrylate, caprolactone-modified diperythritol hexa(meth)acrylate, etc. (meth)acrylates. These may be used alone or in combination of two or more.

Examples of the (meth)acrylate prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, polyol acrylate, and other prepolymers.

As a polyester acrylate prepolymer, for example, polycarboxylic acid and polyhydric alcohol are condensed to obtain hydroxyl groups and (meth)acrylates of polyester oligomers with hydroxyl groups at both ends, or alkylene oxide plus It is obtained by esterifying the terminal hydroxyl group of the oligomer obtained by forming a polycarboxylic acid with (meth)acrylate.

Epoxy acrylate prepolymers, for example, can be synthesized by (meth)acrylic acid and relatively low molecular weight bisphenol-type epoxy resin, novolac-type epoxy resin, oxirane ring (oxirane ring) reaction, esterification get.

The urethane acrylate prepolymer can be obtained, for example, by (meth)acrylating a polyurethane oligomer obtained by reacting polyether polyol, polyester polyol, or the like with polyisocyanate.

The polyol acrylate prepolymer can be obtained, for example, by esterifying the hydroxyl group of polyether polyol with (meth)acrylate.

The above prepolymers may be used alone or in combination of two or more.

In addition, it is preferable to use an organic-inorganic hybrid resin as the active energy ray-curing component. As an organic-inorganic hybrid resin, what combined the inorganic fine particle which has silica (silica) etc., and the organic compound of a polymerizable unsaturated group via a silane coupling agent etc. is mentioned preferably. This organic-inorganic hybrid resin is preferably in the form of a sol (colloid) (such as a silica sol), and may be mixed with an active energy ray-curing component such as the above-mentioned polyfunctional (meth)acrylate monomer. It is better to use. In addition, the inorganic fine particles contained in the organic-inorganic hybrid resin do not correspond to fillers described later, but have a function as a binder, and can increase the hardness of the formed hard coat layer 12 .

The above-mentioned organic-inorganic hybrid resin is preferably one in which (meth)acryl groups, silanol groups, etc. are bonded to inorganic fine particles in order to make the cured hard coat layer 12 stronger. The average particle diameter of the inorganic fine particles is preferably at least 5 nm, more preferably at least 10 nm, particularly preferably at least 15 nm, and even more preferably at least 20 nm. In addition, the average particle diameter of the inorganic fine particles is preferably not more than 100 nm, more preferably not more than 90 nm, particularly preferably not more than 80 nm, and even more preferably not more than 70 nm. When the average particle diameter is in the above-mentioned range, the strength of the cured hard coat layer 12 can be maintained. In addition, the antiviral action of antiviral agents can be inhibited. In addition, the average particle diameter of the said inorganic fine particle was measured by the centrifugal sedimentation light transmission method.

In the case where the organic-inorganic hybrid resin is mixed with an active energy ray-curable component such as the above-mentioned polyfunctional (meth)acrylic monomer, the amount of the organic-inorganic hybrid resin is The content is preferably about 10 to 200 parts by mass.

(1-2) Antiviral agents Any antiviral agent may be used as long as it can inactivate a desired virus. The target virus may be a virus with an envelope or a virus without an envelope. Examples of viruses having an outer membrane include influenza virus, SARS-CoV-2, herpes virus, rubella virus, hepatitis B virus, hepatitis C virus, and AIDS virus. In addition, examples of viruses that do not have an outer membrane include norovirus, rotavirus, poliovirus, adenovirus, and feline calicivirus.

Examples of the antiviral agent include inorganic antiviral agents and organic antiviral agents, but it is preferable to use an inorganic antiviral agent because it is easy to satisfy the aforementioned haze value. Examples of inorganic antiviral agents include metal oxides, metal salts (including double salts; the same applies hereinafter), metal ionophores, and the like, among which metal oxides or metal salts are preferable, and molybdenum atoms are included. Metal oxides or metal salts (molybdenum compounds) are particularly preferred. These may be used alone or in combination of two or more.

Examples of metal oxides include silver oxide, zinc oxide, copper oxide, iron oxide, titanium oxide, tin oxide, tungsten oxide, chromium oxide, zirconium oxide, and molybdenum oxide. Among these, silver oxide, zinc oxide, copper (I) oxide, or copper (II) oxide is preferable.

Preferred examples of the metal salt include Group 11 salts such as silver and copper, Group 12 salts such as zinc, and Group 6 salts such as molybdenum. As the acid which forms a metal salt, nitric acid, acetic acid, sulfuric acid, etc. are mentioned preferably. That is, as a preferable silver salt, silver nitrate, silver acetate, silver sulfate etc. can be mentioned; As a preferable zinc salt, zinc nitrate, zinc acetate, zinc sulfate etc. can be mentioned; As a preferable copper salt, copper nitrate can be mentioned , copper acetate, copper sulfate, etc. In addition, an alkali metal salt (alkali salt) of oxymolybdic acid is also preferred. Examples of the alkali metal salt of oxymolybdic acid preferably include sodium molybdate, potassium molybdate, lithium molybdate, ammonium molybdate, sodium polymolybdate, sodium isopolymolybdate, and the like.

A particularly preferable metal salt is a molybdate obtained by reacting one or more metal salts selected from silver salts, copper salts, and zinc salts with an alkali metal salt of oxymolybdic acid. This molybdate exhibits particularly excellent antiviral properties even in a hard coat layer.

The antiviral agent is preferably in the form of particles (powder), so that the aforementioned haze value can be easily satisfied. The average particle diameter of the antiviral agent is preferably at least 0.01 μm, more preferably at least 0.1 μm, particularly preferably at least 0.5 μm, and still more preferably at least 1.0 μm. In addition, the average particle diameter of the antiviral agent is preferably at most 10 μm, more preferably at most 8.0 μm, particularly preferably at most 6.0 μm, and even more preferably at most 4.0 μm. Thereby, it becomes easier to satisfy the above-mentioned haze value while exhibiting antiviral property favorably. In addition, the average particle diameter of the antiviral agent was measured by a laser diffraction method.

The content of the antiviral agent in the hard coat layer 12 (composition C for hard coat layer) is preferably at least 0.01% by mass, more preferably at least 0.1% by mass, particularly preferably at least 0.5% by mass, and preferably at least 1.0% by mass. More preferably, mass % or more. Thereby, suitable antiviral properties can be exhibited. In addition, the content of the antiviral agent in the hard coat layer 12 (composition C for hard coat layer) is preferably not more than 30% by mass, more preferably not more than 20% by mass, and most preferably not more than 14% by mass. More preferably, it is 8 mass % or less. Thereby, the hard coat layer 12 excellent in scratch resistance can be obtained easily.

The content of the antiviral agent is preferably at least 0.01 part by mass, more preferably at least 0.1 part by mass, particularly preferably at least 0.5 part by mass, and further preferably at least 1.0 part by mass relative to 100 parts by mass of the active energy hardening component. good. In addition, the content of the antiviral agent is preferably not more than 30 parts by mass, more preferably not more than 20 parts by mass, particularly preferably not more than 14 parts by mass, and not more than 8 parts by mass relative to 100 parts by mass of the active energy-curing component. For better.

(1-3) filler Composition C for a hard coat layer preferably contains a filler other than an antiviral agent. Thereby, it is easier to satisfy the aforementioned haze value. Examples of fillers include inorganic fine particles such as silica, calcium carbonate, aluminum hydroxide, magnesium hydroxide, clay, talc, and titanium dioxide; organic particles such as acrylic resins, polystyrene resins, polyethylene resins, and epoxy resins. Microparticles; microparticles composed of silicon-containing compounds with an intermediate structure between inorganic and organic (for example, the Tospearl series of silicone resin microparticles manufactured by Momentive Performance Materials Japan Co., Ltd.), etc. These fillers may be used alone or in combination of two or more.

Examples of fine particles composed of the aforementioned acrylic resin include methyl methacrylate homopolymer, methyl methacrylate and vinyl acetate, styrene, methacrylate, ethyl (meth)acrylate Those composed of copolymers of monomers, etc.

The shape of the filler may be a fixed shape such as a spherical shape, or may be an unfixed shape without a specific shape, and is appropriately selected so that a desired haze value can be obtained. From the point of view of better anti-glare performance, it is better to use non-fixed inorganic fine particles (for example, non-fixed silicon dioxide). It is preferable to use spherical organic fine particles.

The average particle size of the filler is preferably at least 0.1 μm, particularly preferably at least 0.3 μm, particularly preferably at least 0.5 μm, and still more preferably at least 1.0 μm. In addition, the average particle diameter of the filler is preferably not more than 10 μm, more preferably not more than 8.0 μm, particularly preferably not more than 5.0 μm, and still more preferably not more than 3.0 μm. When the average particle size of the filler is in the above range, it is easier to satisfy the aforementioned haze value. In addition, the antiviral action of antiviral agents can be inhibited. In addition, the average particle diameter of a filler is measured by the centrifugal sedimentation light transmission method.

The content of the filler is preferably at least 1.0 parts by mass, more preferably at least 3.0 parts by mass, particularly preferably at least 5.0 parts by mass, and still more preferably at least 10 parts by mass, based on 100 parts by mass of the active energy ray-curing component. . In addition, the content of the filler is preferably not more than 50 parts by mass, more preferably not more than 30 parts by mass, particularly preferably not more than 20 parts by mass, and not more than 15 parts by mass relative to 100 parts by mass of the active energy ray-curing component. Further better. With the content of the filler within the above range, it is easier to satisfy the aforementioned haze value. In addition, the antiviral action of antiviral agents can be inhibited.

(1-4) Photopolymerization initiator When curing the above-mentioned active energy ray-curable component using ultraviolet rays, the composition C for a hard coat layer preferably contains a photopolymerization initiator. By containing the photopolymerization initiator, the active energy ray-curable component can be efficiently polymerized, and the polymerization curing time and the irradiation amount of ultraviolet rays can be reduced.

Examples of such photopolymerization initiators include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, Methylaminoacetophenone, 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-morpholinyl-propane-1- Ketone, 4-(2-hydroxyethoxy)phenyl-2(hydroxy-2-propyl)ketone, benzophenone, p-phenylbenzophenone, 4,4'-diethylamino Diphenyl ketone, dichlorodiphenyl ketone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tert-butylanthraquinone, 2-aminoanthraquinone, 2-methylthioxanthraquinone Ketone (2-methylthioxanthone), 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone Ketone, benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethylamino benzoate, oligo[2-hydroxy-2-methyl-1[4-(1-methyl vinyl) phenyl] acetone], 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, etc. These may be used alone or in combination of two or more.

The lower limit of the content of the photopolymerization initiator in the composition C for a hard coat layer is preferably 0.01 parts by mass or more, particularly 0.1 parts by mass or more, based on 100 parts by mass of the active energy ray-curable component. Preferably, more than 1 part by mass is more preferred. Moreover, as an upper limit, 20 mass parts or less is preferable, 10 mass parts or less is especially preferable, and 5 mass parts or less is still more preferable.

(1-5) leveling agent The coating composition C of this embodiment preferably contains a leveling agent. Thereby, the formed hard coat layer 12 has a uniform film thickness without stripe defects, unevenness, etc., and exhibits excellent optical properties and appearance.

As leveling agents, for example, silicone-based leveling agents, fluorine-based leveling agents, acrylic-based leveling agents, vinyl-based leveling agents, etc. can be cited. From the point of view, it is better to use silicone leveling agent or fluorine leveling agent. Moreover, a leveling agent may be used individually by 1 type, and may use it in combination of 2 or more types.

The leveling agent can be modified or unmodified. In addition, the leveling agent may have a reactive group or may not have a reactive group.

The content of the leveling agent is preferably at least 0.01 part by mass, particularly preferably at least 0.05 part by mass, and still more preferably at least 0.1 part by mass with respect to 100 parts by mass of the active energy ray-curing component. In addition, the content is preferably not more than 5.0 parts by mass, particularly preferably not more than 3.0 parts by mass, and more preferably not more than 1.0 parts by mass.

(1-6) Other ingredients The coating composition C in this embodiment may contain various additives in addition to the above-mentioned components. Examples of various additives include dispersants, antifouling agents, ultraviolet absorbers, antioxidants, light stabilizers, antistatic agents, silane coupling agents, antiaging agents, thermal polymerization inhibitors, colorants, and surfactants. , storage stability, plasticizers, lubricants, defoamers, etc.

(2) Thickness The thickness of the hard coat layer 12 is preferably at least 0.5 μm, more preferably at least 1.0 μm, particularly preferably at least 1.5 μm, and still more preferably at least 2.0 μm. Thereby, while fully exhibiting the function as a hard coat, such as scratch resistance, antiviral property and antiglare property can be exhibited favorably. In addition, the thickness of the hard coat layer 12 is preferably at most 20 μm, more preferably at most 15 μm, particularly preferably at most 10 μm, and even more preferably at most 5.0 μm. Thereby, optical properties such as anti-glare property and light transmittance can be exhibited favorably.

1-2. Substrate film Although it does not specifically limit as the base film 11, it is preferable to use the resin film which has predetermined transparency. As such a resin film, for example, polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyethylene films, polypropylene films, etc.; Films and other polyolefin films; cellophane, diacetyl cellulose film, triacetyl cellulose film, acetyl cellulose butyrate film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film , Ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, polycarbonate film, polyetheretherketone film, polyether film, polyetherimide film, fluororesin Films, polyamide films, acrylic resin films, polyurethane resin films, norbornene-based polymer films, cycloolefin-based polymer films, cyclic conjugated diene-based polymer films, vinyl cycloaliphatic polymer films, etc. Plastic film or its laminated film. Among them, polyethylene terephthalate film, polycarbonate film, triacetyl cellulose film, norcamphene-based polymer film, etc. are preferable in terms of mechanical strength and the like.

In addition, in the above-mentioned base material 11 , for the purpose of improving the adhesiveness with the layer provided on the surface, one or both sides may be subjected to surface treatment by priming, oxidation, embossing, etc. as desired. As an oxidation method, for example, corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone. Ultraviolet treatment and the like; Examples of the roughening method include a sand blasting method, a solvent treatment method, and the like. These surface treatment methods can be appropriately selected according to the type of base material 11 , but corona discharge treatment is preferably used from the viewpoint of the general effect of improving the adhesion and operability.

The thickness of the substrate 11 is not particularly limited, but considering the use of the touch panel, it is preferably 25 μm or more, particularly preferably 38 μm or more, and more preferably 50 μm or more. In addition, the thickness of the substrate 11 is preferably not more than 500 μm, particularly preferably not more than 400 μm, and more preferably not more than 300 μm.

1-3. Other components (1) Anti-reflection layer With regard to the hard coat film 1 of this embodiment, as shown in FIG. . Thereby, the hard coat film 1 of this embodiment can exhibit not only the anti-glare property but also the anti-reflection property, and the image can be further improved when used in a display. Image visibility. In addition, compared with the hard coat layer 12, the antireflection layer 13 is a very thin layer, and even if the antireflection layer 13 exists on the hard coat layer 12, it is possible to exert the functions contained in the hard coat layer 12 without any doubt. The antiviral function of the antiviral agent.

The antireflection layer 13 exhibits antireflection properties by having a refractive index lower than that of the hard coat layer 12 . Therefore, it is preferable to use a composition (composition for an antireflective layer) by using a binder resin with a low refractive index (for example, a fluorine-based adhesive such as a fluorine-containing acrylate, a silicone-based adhesive such as a silicone resin) object) to form the antireflection layer 13, or, in addition to the binder resin, the composition for the antireflection layer (the antireflection layer 13) contains low-refractive index particles.

In the case of the antireflection layer 13 containing low-refractive-index particles, the same binder resin as the active energy ray-curable component in the hard coat layer 12 can be used.

As the low-refractive index particles, for example, hollow silica fine particles, porous silica fine particles, etc. are preferably used, among which hollow silica fine particles are preferable. Hollow silica microparticles can be modified with organic substances for the purpose of improving dispersibility. In addition, the hollow silica microparticles are preferably in the form of an organosol (colloid) (hollow silica sol).

The hollow silica microparticles have fine voids in the microparticles in an open state or in a closed state. Hollow silica fine particles have a lower refractive index because gas (air) is filled in the above-mentioned voids. Therefore, by using such fine particles, the refractive index of the antireflection layer 13 can be efficiently lowered without impairing the transparency of the antireflection layer 13 . The hollow silica fine particles may have independent cells, continuous cells, or both independent cells and continuous cells.

The average particle diameter of the low-refractive-index particles is preferably at least 5 nm, particularly preferably at least 10 nm, and still more preferably at least 30 nm, from the viewpoint of exhibiting a low refractive index. In addition, from the viewpoint of exhibiting the antiviral and antiglare properties of the hard coat layer 12, the average particle diameter of the low-refractive index particles is preferably not more than 300 nm, particularly preferably not more than 200 nm, and more preferably not more than 100 nm. . In addition, the average particle diameter of the low-refractive-index particles in this specification is measured by the centrifugal sedimentation light transmission method.

The content of the low-refractive index particles is preferably at least 10 parts by mass, particularly preferably at least 25 parts by mass, and still more preferably at least 50 parts by mass, based on 100 parts by mass of the binder resin (active energy ray-curable component). In addition, the content is preferably at most 300 parts by mass, particularly preferably at most 200 parts by mass, and still more preferably at most 90 parts by mass, based on 100 parts by mass of the above-mentioned binder resin. When the content of the low-refractive-index particles is within the above-mentioned range, it is easy to form the antireflection layer 13 having a desired refractive index.

The antireflection layer composition may contain the same various additives as the coating composition C for the hard coat layer 12 in addition to the above components. In particular, when the antireflection layer 13 is located on the outermost surface of the hard coat film 1, the antireflection layer composition preferably contains an antifouling agent.

As an antifouling agent, a silicone type antifouling agent, a fluorine type antifouling agent, an acrylic type antifouling agent etc. are mentioned, for example. Among them, it is preferable to use a fluorine-based antifouling agent from the viewpoint of preventing the adhesion of fingerprints and stains. In addition, as a fluorine-based antifouling agent, an active energy ray-curable component as a binder resin, specifically, a polyfunctional (meth)acrylate-based monomer or a (meth)acrylate-based monomer that can be prepolymerized Polymerized (meth)acrylate-based fluororesins are preferred.

The content of the antifouling agent in the antireflective layer composition is preferably at least 3 parts by mass, particularly preferably at least 5 parts by mass, and 10 parts by mass relative to 100 parts by mass of the binder resin (active energy ray-curing component). More than one serving is further preferred. In addition, the content of the antifouling agent is preferably not more than 30 parts by mass, particularly preferably not more than 25 parts by mass, and still more preferably not more than 20 parts by mass.

The thickness of the antireflection layer 13 is preferably at least 0.01 μm, more preferably at least 0.03 μm, particularly preferably at least 0.06 μm, and still more preferably at least 0.08 μm. Thereby, it becomes easy to achieve low reflectance, and it becomes what is excellent in scratch resistance. In addition, the thickness of the antireflection layer 13 is preferably not more than 1 μm, more preferably not more than 0.5 μm, particularly preferably not more than 0.3 μm, and still more preferably not more than 0.2 μm. Thereby, the antiviral property and antiglare property of the hard coat layer 12 can be exhibited favorably.

(2) Adhesive layer The hard coat film 1 of this embodiment may be provided with an adhesive layer on the surface side of the substrate 11 opposite to the hard coat layer 12 . The adhesive constituting the adhesive layer is not particularly limited, and known adhesives such as acrylic adhesives, rubber adhesives, and silicone adhesives can be used, and an adhesive having predetermined transparency can be used. good.

In addition, when the hard coat film 1 of the present embodiment includes the above-mentioned adhesive layer, the hard coat film 1 of the present embodiment may have a peeling film on the surface opposite to the substrate 11 of the adhesive layer. The release film is not particularly limited as long as it has desired release properties on its release surface (the surface in contact with the adhesive layer). A known release film can be used, such as one side of the resin film with a release agent. Strip handlers, etc.

2. Manufacturing method of hard coat film The hard coat film 1 of this embodiment can be produced by applying a coating liquid to the base film 11 and curing it to form the hard coat layer 12, wherein the coating liquid contains a coating composition for the hard coat layer 12, Coating composition C is preferred, and a solvent as needed.

The solvent can be used for improvement of coatability, adjustment of viscosity, adjustment of solid content concentration, etc., and is not particularly limited as long as it dissolves or disperses each component. Specific examples of solvents include alcohols such as methanol, ethanol, isopropanol, butanol, and octanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; Esters of ethyl acetate, butyl acetate, ethyl lactate, γ-butyrolactone, etc.; ethylene glycol monomethyl ether (methyl celuso), ethylene glycol monoethyl ether (ethyl celuso), di Ethers such as ethylene glycol monobutyl ether (butyl celuso) and propylene glycol monomethyl ether; aromatic hydrocarbons such as benzene, toluene, xylene, etc.; dimethylformamide, dimethylacetamide, Amides such as N-methylpyrrolidone, etc.

Coating of the coating liquid of the coating composition can be performed by a common method, for example, bar coating, blade coating, roll coating, blade coating, die coating, or gravure coating. After applying the coating liquid of the coating composition, it is preferable to dry the coating film at 40 to 120° C. for about 30 seconds to 5 minutes.

Here, when the coating composition contains a leveling agent, the coating film coated with this coating composition has no streaky defects or unevenness, so a hard coating layer with uniform film thickness and excellent appearance can be formed 12.

When the coating composition such as coating composition C is cured by active energy rays, the coating composition is cured by irradiating the coating film of the coating composition with active energy rays such as ultraviolet rays or electron beams. Ultraviolet irradiation can be carried out by high-pressure mercury lamps, Fusion H lamps, xenon lamps, etc., and the irradiation amount of ultraviolet rays is preferably about 50-1000mW/cm ² illuminance and 50-1000mJ/cm ² light intensity. On the other hand, electron beam irradiation can be performed by an electron beam accelerator or the like, and the irradiation dose of electron beam is preferably about 10 to 1000 krad.

Irradiation of the active energy ray to the coating film of the above-mentioned coating composition can be performed in an air atmosphere or an inert gas atmosphere. When the antireflection layer 13 is formed on the hard coat layer 12, the adhesion to the antireflection layer 13 can be improved by curing it in an air environment. On the other hand, depending on the type of active energy ray-curable component, by irradiating the active energy ray in an inert gas atmosphere, the coating composition is cured favorably without being hindered by oxygen. Thereby, the hard coat layer 12 formed becomes one more excellent in scratch resistance.

Examples of the inert gas include nitrogen, argon, and helium, among which nitrogen and argon are preferred, and nitrogen is particularly preferred. The oxygen concentration in the inert gas environment is preferably less than 5%, more preferably less than 3%, and most preferably less than 2%.

In the case of the hard coat film 1 shown in FIG. 2 , after forming the hard coat layer 12 as described above, an antireflection layer 13 may be formed on the exposed surface of the hard coat layer 12 . The antireflection layer 13 can also be formed in the same manner as the hard coat layer 12 . However, it is preferable to harden the composition for an antireflection layer under an inert gas atmosphere. Thereby, the hardness of the formed antireflection layer 13 can be increased, and it can become more excellent in scratch resistance.

3. Physical properties of hard coat film, etc. (1) Total light transmittance The total light transmittance of the hard coat film 1 of this embodiment is preferably at least 80%, more preferably at least 85%, and most preferably at least 90%. Since the total light transmittance is the above value, the transparency is very high, and it is particularly suitable for optical applications (for displays). In addition, the measuring method of the total light transmittance is as shown in the test example mentioned later.

(2) Image sharpness Hard coat film 1 The total value of image sharpness (%) of optical combs of 0.125mm, 0.25mm, 0.5mm, 1.0mm and 2.0mm measured in accordance with JIS K7374:2007 is preferably 200 or more, and 300 or more More preferably, more than 350 is especially preferred, and more than 400 is still more preferred. In this way, the image in the display. The visibility of the image becomes good.

On the other hand, the total value of the above image sharpness (%) is preferably 480 or less, more preferably 470 or less, particularly preferably 460 or less, and still more preferably 450 or less. In this way, the image in the display can be well maintained at the same time. While maintaining the visibility of images, it exhibits anti-glare properties well.

Here, the image sharpness is measured by measuring the light quantity of parallel rays passing through a test object with an optical comb having a transmission part and a light shielding part. The smaller the width of the transmissive part and the light-shielding part (comb width) in the optical comb, the higher the sharpness of fineness. Image sharpness was measured based on the transmission method of JIS K7374:2007. The specific measuring method is shown in the test example mentioned later.

(3) 60∘ specular gloss In the hard coat film 1 of this embodiment, the surface on the hard coat layer 12 side (the exposed surface of the hard coat layer 12 or the exposed surface of the antireflection layer 13 is sometimes referred to as "the surface of the hard coat film 1" below). 」) of 60∘ specular gloss (gloss) from the viewpoint of preventing fading, preferably at least 30%, more preferably at least 50%, and most preferably at least 70%. In addition, the 60∘ specular gloss of the hard coat film 1 is preferably 150% or less, particularly preferably 110% or less, and still more preferably 90% or less from the viewpoint of imparting anti-glare properties. In addition, the measuring method of 60∘ specular gloss in this specification is as shown in the test example mentioned later.

(4) Pencil hardness The pencil hardness of the surface of the hard coat film 1 of this embodiment is preferably F or higher, particularly preferably H or higher, and still more preferably 2H or higher. Since the antireflection layer 13 has such a pencil hardness, the surface of the hard coat film 1 has sufficient hardness and can exhibit excellent scratch resistance. The upper limit of the pencil hardness is not particularly limited, but is preferably 6H or less. In addition, the measuring method of pencil hardness is as shown in the test example mentioned later.

(5) Reflectivity Regarding the pencil hardness of the surface of the hard coat film 1 of the present embodiment, in the case of having an antireflection layer 13 as shown in FIG. Below is better, below 2.5% is particularly good, and below 2.3% is even better. Thereby, in the display using this hard coat film 1, the reflection of external light can be reduced and the image can be improved. Image visibility. The lower limit of the above-mentioned reflectance is not particularly limited, but generally, it is preferably 0.1% or higher, more preferably 0.2% or higher, and particularly preferably 0.5% or higher. In addition, the measuring method of the reflectance in this specification is as shown in the test example mentioned later.

(6) Antiviral activity value The antiviral activity value of the hard coat film 1 of the present embodiment is preferably at least 1.0, more preferably at least 1.5, and particularly preferably at least 2.0. In addition, the measurement method of the antiviral activity value in this specification is as shown in the test example mentioned later.

4. Use of hard coating film The hard coat film 1 of this embodiment is used, for example, as a surface layer of various displays (display bodies) such as a liquid crystal display, an organic EL display, and a touch panel. Specifically, it is laminated on a cover material of a display such as a liquid crystal (LCD) module, a light emitting diode (LED) module, an organic electroluminescence (organic EL) module, etc. good. Lamination of the hard coat film 1 to the covering material is preferably carried out by sticking via the above-mentioned adhesive layer.

5. Display with hard coat film A display with a hard coat film can be obtained by laminating the hard coat film of the embodiment described above on the display main body. The display with a hard coat film specifically includes a hard coat film and a display body, and the base film side of the hard coat film is laminated on the display surface side of the display body. The hard coat film may be laminated directly on the display surface of the display main body, or may be laminated on the display surface side of the display main body via other members, layers, or the like.

The embodiments described above are described for easy understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiments is intended to include all design changes, equivalents, and the like belonging to the technical scope of the present invention.

For example, another layer may be inserted between the base film 11 and the hard coat layer 12 in the hard coat film 1 . In addition, the hard coat layer 12 may be provided on both surfaces of the base film 11 . Further, when the hard coat layer is provided on both sides of the base film 11, one hard coat layer is the hard coat layer 12 of this embodiment, and the other hard coat layer may not contain an antiviral agent. The usual hard coating layer. [Example]

Hereinafter, although an Example etc. demonstrate this invention more concretely, the scope of the present invention is not limited to these Examples etc.

[Example 1] 6.5 g of sodium molybdate dihydrate was dissolved in 100 ml of ion exchanged water. In addition, 9.1 g of silver nitrate was dissolved in 100 ml of ion-exchanged water. While stirring the aqueous solution of silver nitrate, it was dropped into the aqueous solution of sodium molybdate dihydrate over 30 minutes to obtain a precipitate. After stirring for an additional hour, the precipitate was filtered, washed with ion-exchanged water, and then sufficiently dried at 100°C. Next, this precipitate was thoroughly ground in a mortar to obtain about 10 g of a yellow-white powder.

Organic-inorganic hybrid resin (manufactured by Arakawa Chemical Industry Co., Ltd., product name "Opstar Z7530", silica fine particles (CV value: 28%) with an average particle size of 50nm) as an active energy ray-curing component is combined with acryl group 100 parts by mass of a mixture of the resulting substance and a polyfunctional (meth)acrylate monomer, a product containing a photopolymerization initiator) (expressed as a solid content conversion value. The same applies to other components below), as an anti- 0.5 parts by mass of the above-mentioned powder (A1) of the virus agent, 12.3 parts by mass of a polymethyl methacrylate resin filler (manufactured by Sekisui Chemical Co., Ltd., product name "SSX-101", average particle size: 1.0 μm) as a filler, and as a dispersion 0.41 parts by mass of a carboxyl-containing polymer modified product (manufactured by Kyoeisha Chemical Co., Ltd., product name "Floren G-700"), and polydimethylsiloxane (Toray Dow Corning Co., Ltd.) as a silicone-based leveling agent. manufactured, product name "SH28"), 0.16 parts by mass were mixed in propylene glycol monomethyl ether to obtain a coating solution of a composition for a hard coat layer. This series of compositions for hard coating layers (the content of the antiviral agent may vary) is denoted as "C1" in Table 1.

The above-obtained coating solution for the hard coat layer was applied with a Meyer rod to a triacetyl cellulose (TAC) film (manufactured by Konica Minolta, product name "KU8UAW", thickness: 80 μm) as a base film. Dry one side at 70°C for 1 minute.

Next, in a nitrogen atmosphere, ultraviolet rays were irradiated with an ultraviolet irradiation device (manufactured by Eye Graphics, product name "EYE GRANTAGE ECS-401GX type") under the following conditions to form a hard coat layer with a thickness of 5.0 μm on the base film. , to obtain a hard coating film. [UV irradiation conditions] ． Light source: high pressure mercury lamp ． Lamp power: 2kW ．  Conveyor belt speed: 4.23m/min ． Illumination: 200mW/cm2 ． Light quantity: 200mJ/cm2

[Example 2~3, 5] A hard coat film was produced in the same manner as in Example 1 except that the compounding amount of the antiviral agent was changed as shown in Table 1.

[Example 4] 100 parts by mass of urethane acrylate prepolymer (manufactured by Arakawa Chemical Industry Co., Ltd., product name "Beamset 575CB") as an active energy ray-curable component, hollow silica sol as low refractive index particles ( Nikki Catalyst Chemicals Co., Ltd., "Thruria 4320", average particle size: 60nm) 51.3 parts by mass, as an antifouling agent, a fluorine-based resin having a (meth)acrylate group at one end (Fluorotechnology Co., Ltd., "FS-7025 ”) 10 parts by mass, and 3 parts by mass of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-propan-1-one as a photopolymerization initiator, in Cyclohexanone and methyl isobutyl ketone were mixed in a mixed solvent of 1:1 (mass ratio) to obtain a coating liquid of a composition for an antireflection layer.

In addition to changing the nitrogen atmosphere to the air atmosphere to irradiate ultraviolet rays, the coating solution of the obtained antireflection layer composition was applied to the hard coat film obtained in the same manner as in Example 3 with a Meyer rod. The exposed side of the coating was allowed to dry at 90°C for 1 minute.

Next, in a nitrogen atmosphere, ultraviolet rays were irradiated under the following conditions with an ultraviolet irradiation device (manufactured by Eye Graphics, product name "EYE GRANTAGE ECS-401GX") to form an antireflection layer with a thickness of 0.1 μm. Thereby, the hard coat film which laminated|stacked a base film, a hard coat layer, and an antireflection layer sequentially was obtained. [Ultraviolet irradiation conditions] . Light source: high pressure mercury lamp. Lamp power: 2kW. Conveyor belt speed: 4.23m/min. Illumination: 300mW/cm ² . Light quantity: 250mJ/cm ²

[Example 6] The above-mentioned powder ( A1) 0.5 parts by mass, 0.2 parts by mass of a fluorinated adamantane derivative containing a polymerizable group as a fluorine-based leveling agent (manufactured by Neos, product name "Futergent 602A"), 1-hydroxyl as a photopolymerization initiator 4.0 parts by mass of cyclohexyl phenyl ketone was mixed with propylene glycol monomethyl ether to obtain a coating liquid of a composition for a hard coat layer. This series of compositions for the hard coat layer is denoted as "C2" in Table 1.

A hard coat film was produced in the same manner as in Example 1 except that a hard coat layer having a thickness of 4.0 μm was formed using the obtained coating liquid of the composition for a hard coat layer.

[Example 7] 100 parts by mass of urethane acrylate-based prepolymer (manufactured by Arakawa Chemical Industry Co., Ltd., product name "Beamset 575CB", product containing a photopolymerization initiator) as an active energy ray-curable component, and not used as a filler 12 parts by mass of immobilized silica microparticles (average particle diameter 1.5 μm), 0.5 parts by mass of the above-mentioned powder (A1) as an antiviral agent, and polydimethylsiloxane (Toray Dow Corning Corporation, product name "SH28") 0.2 parts by mass were mixed with propylene glycol monomethyl ether to obtain a coating solution of a composition for a hard coat layer. This series of compositions for hard coating layers (the type and content of the antiviral agent may vary) is denoted as "C3" in Table 1.

The above-obtained coating solution for a hard coat layer was coated on a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., product name "PET188 U403", thickness: 188 μm) as a base film with a Meyer rod. ) on one side and let it dry at 70°C for 1 minute.

Next, in a nitrogen atmosphere, a hard coat layer with a thickness of 3.5 μm was formed on the substrate by irradiating ultraviolet rays under the following conditions with an ultraviolet irradiation device (manufactured by Eye Graphic, product name "EYE GRANTAGE ECS-401GX type"). A hard coat film was obtained. [Ultraviolet irradiation conditions] . Light source: high pressure mercury lamp. Lamp power: 2kW. Conveyor belt speed: 4.23m/min. Illumination: 300mW/cm ² . Light quantity: 250mJ/cm ²

[Comparative example 1] As an antiviral agent, instead of the above-mentioned powder (A1), a silver-containing filler (manufactured by Toyochem, product name "Riodurus AMB-400 WH") (A2) was used in the same manner as in Example 7, except that 5.0 parts by mass was used. Hard coated film.

[Comparative example 2] As an antiviral agent, instead of the above-mentioned powder (A1), the powder of an ether-based organic compound (manufactured by Sekisui Material Co., Ltd., product name "Wiltaker IV") (A3) was used in the same manner as in Example 7 except for 5.0 parts by mass. Manufacture of hard coat films.

[Test Example 1] (Measurement of haze value) About the hard coat film manufactured by the Example and the comparative example, the haze value (%) was measured based on JISK7136:2000 using the haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd., product name "NDH5000"). The results are shown in Table 2.

[Test example 2] (Measurement of total light transmittance) The total light transmittance (%) was measured according to JIS K7361-1:1997 about the hard coat film manufactured by the Example and the comparative example using the haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd., product name "NDH5000"). The results are shown in Table 2.

[Test Example 3] (Measurement of Image Sharpness) For the hard coat films produced in Examples and Comparative Examples, five types of optical combs were measured by the transmission method in accordance with JIS K7374:2007 using an imaging tester (manufactured by Suga Test Instrument Co., Ltd., product name "ICM-10P"). (comb width: 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm) image sharpness (%), and calculate the total value. The results are shown in Table 2.

[Test Example 4] (Measurement of 60∘ specular gloss) About the hard coat film manufactured by the Example and the comparative example, the 60∘ specular gloss (gloss value, %) was measured based on JIS Z8741-1997 using the gloss meter (made by Nippon Denshoku Kogyo Co., Ltd.). The results are shown in Table 2.

[Test Example 5] (Measurement of Reflectance) The base film-side surface of the hard coat film produced in Example 4 was attached to one surface of a black board (manufactured by U-KOU Shokai, product name "Acrylite") via a double-sided adhesive sheet. Next, the reflectance (%) of the surface of the hard coat film (exposed surface of the antireflection layer) was measured using an ultraviolet-visible-near-infrared spectrophotometer (manufactured by Shimadzu Corporation, product name "UV-3600"). The wavelength range was set to 380 to 780 nm and measured. The results are shown in Table 2.

[Test Example 6] (Evaluation of anti-glare property) The surface of the base film side of the hard coat film manufactured in the Example and the comparative example was attached to one surface of a black board (manufactured by U-KOU Shokai, product name "Acrylite") via a double-sided adhesive sheet. For the obtained laminated body of the hard coat film and the black plate, a 3-wavelength fluorescent lamp was lit above the laminated body, and light was reflected by the hard coat film. This reflected light was visually observed, and the anti-glare property was evaluated by the following reference|standard. The results are shown in Table 2. ⊚: The outline of the fluorescent lamp seen by the reflection of the hard coat film was blurred. ◯: The outline of the fluorescent lamp visually recognized by the reflection of the hard coat film is slightly blurred. ╳: The outline of the fluorescent lamp recognized by the reflection of the hard coat film is not blurred.

[Test Example 7] (Measurement of Pencil Hardness) The pencil hardness was measured based on JISK5600 about the hard coat film manufactured by the Example and the comparative example. Specifically, on the surface of the hard coat film, a pencil with a different hardness of the pencil lead (manufactured by Mitsubishi Pencil Co., Ltd., product name "Mitsubishi Pencil uni") was run with a load of 750g and an angle of 45∘ to run more than 7mm. test. This test was performed 5 times, and the hardness of the pencil lead whose film surface was not scratched 4 times or more was defined as the pencil hardness of the surface of the hard coat film. The results are shown in Table 2.

[Test Example 8] (Evaluation of Scratch Resistance) The surface of the hard coat film produced in Examples and Comparative Examples was rubbed back and forth for 10 cm under a load of 250 g/cm ² using #0000 steel wool. ,10 times. The surface of this hard coat film was visually confirmed under the fluorescent lamp of 3 wavelengths, and the abrasion resistance was evaluated by the following reference|standard. The results are shown in Table 2. ⊚: The number of scratches is 3 or less. ○: The number of scars is 4 or more and 10 or less. ╳: The number of scars is 11 or more.

[Test Example 9] (Antiviral Test) The virus types of the antiviral test were set as seasonal influenza A virus (with outer membrane) and feline calicivirus (without outer membrane), and according to ISO 21702, the hard-coated films manufactured in Examples and Comparative Examples were tested against Viral test. Specifically, as follows.

By infecting host cells with virus and culturing, a virus suspension of a predetermined concentration is prepared. Put the hard-coated films (5cm×5cm; measurement samples) produced in Examples and Comparative Examples into petri dishes (Schale), and place 0.4mL of virus suspension on the surface of the hard-coated films to suspend the virus The solution was spread over the entire surface of the hard coat film, and covered with a polyethylene film (4 cm x 4 cm).

After the above-mentioned petri dish was kept in a constant temperature and humidity machine for a predetermined period of time, it was washed out with SCDLP medium, and the eluate was diluted step by step with EMEM medium. These dilutions were then assayed for viral infectivity in a plaque assay. Instead of the hard coat film, a polyethylene film (5 cm×5 cm; standard sample) was used as a target, and the virus infectivity was measured in the same manner as above. The difference between the virus infection level of the measured standard sample and the virus infection level of the measurement sample was calculated as a log value, and this was used as the antiviral activity value. The results are shown in Table 2.

[Table 1] Composition for hard coat layer antiviral agent Hard Coating Thickness Substrate film Anti-reflection layer type type parts by mass µm type with or without Example 1 C1 A1 0.5 5.0 TAC 80μm none Example 2 1.0 Example 3 2.0 Example 4 have Example 5 5.0 none Example 6 C2 0.5 4.0 PET 100μｍ Example 7 C3 0.5 3.5 PET 100μｍ Comparative example 1 A2 5 Comparative example 2 A3 5

[Table 2] Haze value (%) Total light transmittance (%) Image sharpness (5-comb total value) 60∘Specular Gloss (%) Reflectivity(%) Anti-glare evaluation pencil hardness Scratch resistance evaluation Antiviral activity value Seasonal Influenza A feline calicivirus Example 1 10.7 91.2 448 103 - ○ 3H ◎ 3.6 5.2 Example 2 12.0 91.1 432 88 - ○ 3H ◎ 3.6 5.2 Example 3 13.3 91.0 431 86 - ○ 3H ◎ 3.6 5.2 Example 4 10.8 92.6 435 89 2.1 ○ 3H ○ 1.0 2.4 Example 5 15.7 90.7 408 74 - ○ 3H ◎ 3.6 5.2 Example 6 5.7 90.9 375 104 - ○ 3H ◎ 2.3 5.7 Example 7 8.1 90.5 312 91 - ◎ 3H ◎ 2.9 5.3 Comparative example 1 9.2 90.1 305 88 - ◎ 3H ◎ 0.2 0.1 Comparative example 2 31.5 88.6 88 33 - ◎ 3H ◎ 2.4 0.3

As is clear from Table 2, the hard coat films produced in Examples showed excellent antiviral properties against both viruses with an outer membrane and viruses without an outer membrane. Moreover, the hard coat film manufactured in the Example was also excellent in anti-glare property. [Industrial Utilization]

The hard coat film of the present invention is suitably used as a surface layer of a touch panel requiring antiviral properties and antiglare properties.

1: Hard coating film 11: Substrate film 12: Hard coating layer 13: Anti-reflection layer

FIG. 1 is a cross-sectional view of a hard coat film according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of a hard coat film according to another embodiment of the present invention.

1: Hard coating film

11: Substrate film

12: Hard coating layer

Claims (9)

A hard coat film comprising a base film and a hard coat layer provided on at least one side of the base film, wherein: The aforementioned hard coat layer contains an antiviral agent, The haze value is not less than 3.0% and not more than 30%. The hard coat film according to claim 1, wherein the antiviral agent is a molybdenum compound. The hard coat film according to claim 1, wherein the content of the antiviral agent in the hard coat layer is not less than 0.01% by mass and not more than 30% by mass. The hard coat film according to claim 1, wherein the hard coat layer contains fillers other than the antiviral agent. The hard coating film as claimed in item 1, wherein the total light transmittance is above 80%. The hard coat film according to claim 1, wherein the total value of the image sharpness of optical combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm and 2.0 mm is 200 or more and 480 or less. The hard coat film according to claim 1, wherein the pencil hardness of the surface on the side of the hard coat layer is F or higher. The hard coat film according to claim 1, wherein the thickness of the hard coat layer is not less than 0.5 μm and not more than 20 μm. The hard coating film according to any one of Claims 1 to 8, which is for optics.

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