KR20220122464A - hard coating film - Google Patents

Abstract

Provided is a hard coating film having antiviral and antiglare properties. The hard coating film (1) is provided with a base film (11) and a hard coat layer (12) provided on at least one surface side of the base film (11), wherein the hard coat layer (12) includes an antiviral agent and the haze value is 3.0% or more and 30% or less.

Description

Hard coating film {HARD COATING FILM}

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

DESCRIPTION OF RELATED ART In recent years, various electronic devices WHEREIN: A touch panel which served also as a display apparatus and an input means is used a lot. The hard coat film which has a hard coat layer is provided on the surface of this touch panel for scratch prevention in many cases.

By the way, in recent years, a pandemic of infectious disease (COVID-19) of novel coronavirus (SARS-CoV-2) is occurring, and it is becoming a big problem worldwide. When a virus is attached to the surface of the touch panel, when the surface of the touch panel is touched with a finger, the virus may enter the human body through the finger and cause infection. Therefore, it is desired to provide antiviral properties to the surface of the touch panel.

Patent Document 1 and Patent Document 2 disclose non-woven fabrics, knitted fabrics, sheets, and the like having antiviral properties, but application to optical uses is not considered. On the other hand, Patent Document 3 discloses an antiviral member for the purpose of application to various uses.

Japanese Patent Publication No. 5577346 Japanese Patent Publication No. 5614802 Japanese Patent Publication No. 6145758

Although the optical use is also included in the application target of the antiviral member of patent document 3, it is not enough as specific examination assuming use in the outermost surface of a display apparatus etc.

On the other hand, in various displays including a touch panel, since light incident from the outside may reflect and make it difficult to see a display image, the hard coat film may be required to have anti-glare properties.

This invention was made in view of such a reality, and an object of this invention is to provide the hard-coat film which has antiviral property and anti-glare property.

In order to achieve the above object, first, the present invention is a hard coat film comprising a base film and a hard coat layer provided on at least one surface side of the base film, wherein the hard coat layer contains an antiviral agent, and haze Values are 3.0% or more and 30% or less, The hard-coat film characterized by the above-mentioned is provided (invention 1).

The hard coat film which concerns on the said invention (invention 1) is also exhibiting anti-glare property, while having antiviral property, enabling the display of a high-definition image and a video|video.

In the said invention (invention 1), it is preferable that the said antiviral agent is a molybdenum type compound (invention 2).

In the said invention (invention 1, 2), it is preferable that content of the said antiviral agent in the said hard-coat layer is 0.01 mass % or more and 30 mass % or less (invention 3).

In the said invention (invention 1-3), it is preferable that the said hard-coat layer contains fillers other than the said antiviral agent (invention 4).

In the said invention (Inventions 1-4), it is preferable that a total light transmittance is 80 % or more (Invention 5).

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

In the said invention (invention 1-6), it is preferable that the pencil hardness of the surface by the side of the said hard-coat layer is F or more (invention 7).

In the said invention (invention 1-7), it is preferable that the thickness of the said hard-coat layer is 0.5 micrometer or more and 20 micrometers or less (invention 8).

It is preferable that the hard-coat film which concerns on the said invention (invention 1-8) is an object (invention 9).

The hard coat film which concerns on this invention has antiviral property and anti-glare property.

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

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described.

1 : is sectional drawing of the hard-coat film which concerns on one Embodiment of this invention. The hard coat film 1 which concerns on this embodiment is equipped with the base film 11 and the hard-coat layer 12 provided in one surface side of the said base film 11. The hard coat layer 12 contains an antiviral agent, and it is preferable that the haze values of the hard coat film 1 are 3.0 % or more and 30 % or less. In addition, the measuring method of a haze value is as showing to the test example mentioned later.

The hard coat film 1 which concerns on this embodiment consists of what has antiviral property when the hard-coat layer 12 contains an antiviral agent. Moreover, anti-glare property is exhibited because the haze value of the hard-coat film 1 is 3.0 % or more. On the other hand, when the haze value of the hard coat film 1 is 30 % or less and it applies to a display body (display), the display of a high-definition image and a video|video becomes possible. Moreover, the antiviral agent contained in the hard-coat layer 12 also has the effect of improving a haze value.

From an anti-glare viewpoint, it is preferable that the haze value of the hard-coat film 1 is 4.0 % or more, It is more preferable that it is 6.0 % or more, It is especially preferable that it is 8.0 % or more, Furthermore, it is preferable that it is 10.0 % or more. In addition, from the viewpoint of high resolution of images and videos, 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 furthermore, 14% or less. it is preferable

1. Each element

1-1. hard coating layer

The hard-coat layer 12 of the hard-coat film 1 which concerns on this embodiment provides high surface hardness to the hard-coat film 1, and makes it excellent in abrasion resistance. This hard-coat layer 12 contains an antiviral agent, and if the haze value of the hard-coat film 1 becomes the value mentioned above, it will not specifically limit.

It is preferable that the hard-coat layer 12 in this embodiment hardened|cured the composition for hard-coat layers (henceforth "composition C for hard-coat layers") containing an active energy ray-curable component and an antiviral agent. .

(1) each component

(1-1) active energy ray-curable component

As an active energy ray-curable component, it hardens|cures by irradiation of an active energy ray, and what does not inhibit the antiviral action by an antiviral agent is preferable.

As a specific active energy ray-curable component, a polyfunctional (meth)acrylate-type monomer, a (meth)acrylate-type prepolymer, an active energy ray-curable polymer, etc. are mentioned preferably. Among them, a polyfunctional (meth)acrylate-based monomer or a (meth)acrylate-based prepolymer is more preferable. A polyfunctional (meth)acrylate-type monomer and a (meth)acrylate-type prepolymer may be used independently, respectively, and may use both together. In addition, in this specification, (meth)acrylate means both an acrylate and a methacrylate. The same is true for other similar terms.

Examples of the polyfunctional (meth)acrylate-based monomer include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, Polyethylene glycol di(meth)acrylate, hydroxypivalate neopentyl glycol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, caprolactone-modified dicyclopentenyl di(meth)acrylate, ethylene oxide-modified phosphoric acid Di(meth)acrylate, allylated cyclohexyldi(meth)acrylate, isocyanurate di(meth)acrylate, trimethylolpropane tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, Propionic acid modified dipentaerythritol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, propylene oxide modified trimethylolpropane tri(meth)acrylate, tris(acryloxyethyl)isocyanurate, propionic acid modified di Pentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene oxide modified dipentaerythritol hexa (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate, such as polyfunctional (meth)acrylates are mentioned. These may be used individually by 1 type, and may be used in combination of 2 or more type.

As a (meth)acrylate type prepolymer, prepolymers, such as a polyester acrylate type, an epoxy acrylate type, a urethane acrylate type, a polyol acrylate type, are mentioned, for example.

As the polyester acrylate-based prepolymer, for example, by esterifying the hydroxyl groups of a polyester oligomer having hydroxyl groups at both terminals obtained by condensation of a polyhydric carboxylic acid and a polyhydric alcohol with (meth)acrylic acid, or alkylene to polyhydric carboxylic acid It can be obtained by esterifying the hydroxyl group at the terminal of the oligomer obtained by adding an oxide with (meth)acrylic acid.

The epoxy acrylate-based prepolymer can be obtained by, for example, reacting and esterifying (meth)acrylic acid with an oxylan ring of a relatively low molecular weight bisphenol-type epoxy resin or novolak-type epoxy resin.

The urethane acrylate-based prepolymer can be obtained by, for example, esterifying a polyurethane oligomer obtained by reaction of polyether polyol or polyester polyol with polyisocyanate with (meth)acrylic acid.

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

The above prepolymers may be used individually by 1 type, and may be used in combination of 2 or more type.

Moreover, it is also preferable to use organic-inorganic hybrid resin as an active energy ray-curable component. As organic-inorganic hybrid resin, the substance formed by bonding the organic compound which has a polymerizable unsaturated group to inorganic fine particles, such as silica, via a silane coupling agent etc. is mentioned preferably. This organic-inorganic hybrid resin is also preferably in the form of an organosol (colloidal) form (eg, silica sol), and is used by mixing with an active energy ray-curable component such as the aforementioned polyfunctional (meth)acrylate monomer. It is also preferable Moreover, the inorganic fine particle which organic-inorganic hybrid resin contains does not correspond to the filler mentioned later, has a function as a binder, and can improve the hardness of the hard-coat layer 12 formed.

In order that the said organic-inorganic hybrid resin makes the hard-coat layer 12 after hardening more rigid, it is preferable that the (meth)acryloyl group or the silanol group couple|bonded with the inorganic fine particle. The average particle diameter of the inorganic fine particles is preferably 5 nm or more, more preferably 10 nm or more, particularly preferably 15 nm or more, and further preferably 20 nm or more. The average particle diameter of the inorganic fine particles is preferably 100 nm or less, more preferably 90 nm or less, particularly preferably 80 nm or less, and further preferably 70 nm or less. When an average particle diameter exists in said range, the intensity|strength of the hard-coat layer 12 after hardening is maintained. Moreover, inhibition of the antiviral action by an antiviral agent is suppressed. In addition, the average particle diameter of the said inorganic fine particle shall be measured according to the centrifugal sedimentation light transmission method.

When the organic-inorganic hybrid resin is mixed with an active energy ray-curable component such as the aforementioned polyfunctional (meth)acrylate-based monomer, the content of the organic-inorganic hybrid resin with respect to 100 parts by mass of the active energy ray-curable component is 10 to It is preferable that it is about 200 mass parts.

(1-2) antiviral agents

As an antiviral agent, what is necessary is just what can inactivate a desired virus. As a target virus, the virus which has an envelope may be sufficient, and the virus which does not have an envelope may be sufficient. Examples of the virus having an envelope include influenza virus, SARS-CoV-2, herpes virus, rubella virus, hepatitis B virus, hepatitis C virus, and AIDS virus. Moreover, as a virus which does not have an envelope, a norovirus, a rotavirus, a poliovirus, an adenovirus, a feline calicivirus, etc. are mentioned, for example.

Although an inorganic type antiviral agent and an organic type antiviral agent are mentioned as an antiviral agent, It is preferable to use an inorganic type antiviral agent from the easiness of fulfillment of the above-mentioned haze value. Preferred examples of the inorganic antiviral agent include metal oxides, metal salts (including double salts; the same applies below), metal ion carriers, and the like. Among them, metal oxides or metal salts are preferable, and in particular, metal oxides containing molybdenum atoms. Or a metal salt (molybdenum-based compound) is preferable. These may be used individually by 1 type, and may be used in combination of 2 or more type.

Examples of the metal oxide 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.

As a metal salt, salts, such as Group 11, such as silver and copper, Group 12, such as zinc, and Group 6, such as molybdenum, are mentioned preferably. As an acid which forms a metal salt, nitric acid, an acetic acid, sulfuric acid, etc. are mentioned preferably. That is, as a preferable silver salt, silver nitrate, silver acetate, silver sulfate, etc. are mentioned, As a preferable zinc salt, zinc nitrate, zinc acetate, zinc sulfate, etc. are mentioned, As a preferable copper salt, copper nitrate, copper acetate, copper sulfate. and the like. Moreover, the alkali salt of molybdenum oxo acid is also preferable. As an alkali salt of molybdenum oxoic acid, sodium molybdate, potassium molybdate, lithium molybdate, ammonium molybdate, sodium polymolybdate, sodium isopolymolybdate, etc. are mentioned preferably.

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 salt of molybdenum oxoic acid. This molybdate exhibits especially excellent antiviral property among a hard-coat layer.

It is preferable that the antiviral agent is in the form of a particle (powder form), and thus the haze value described above is easily satisfied. It is preferable that the average particle diameter of an antiviral agent is 0.01 micrometer or more, It is more preferable that it is 0.1 micrometer or more, It is especially preferable that it is 0.5 micrometer or more, Furthermore, it is preferable that it is 1.0 micrometer or more. Moreover, it is preferable that the average particle diameter of an antiviral agent is 10 micrometers or less, It is more preferable that it is 8.0 micrometers or less, It is especially preferable that it is 6.0 micrometers or less, Furthermore, it is preferable that it is 4.0 micrometers or less. Thereby, while it becomes easy to exhibit favorable antiviral property, it becomes easy to satisfy the haze value mentioned above more. In addition, the average particle diameter of an antiviral agent shall be measured according to the laser diffraction method.

It is preferable that content of the antiviral agent in the hard-coat layer 12 (composition C for hard-coat layers) is 0.01 mass % or more, It is more preferable that it is 0.1 mass % or more, It is especially preferable that it is 0.5 mass % or more, Furthermore, it is 1.0 mass % or more. It is preferable that it is mass % or more. Thereby, suitable antiviral property can be exhibited. Moreover, it is preferable that content of the antiviral agent in the hard-coat layer 12 (composition C for hard-coat layers) is 30 mass % or less, It is more preferable that it is 20 mass % or less, It is especially preferable that it is 14 mass % or less, and further It is preferable that it is 8 mass % or less. Thereby, it becomes easy to obtain the hard-coat layer 12 excellent in abrasion resistance.

The content of the antiviral agent with respect to 100 parts by mass of the active energy ray-curable component is preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, particularly preferably 0.5 parts by mass or more, and further preferably 1.0 parts by mass or more. do. The content of the antiviral agent with respect to 100 parts by mass of the active energy ray-curable component is preferably 30 parts by mass or less, more preferably 20 parts by mass or less, particularly preferably 14 parts by mass or less, and further 8 parts by mass or less. it is preferable

(1-3) filler

It is also preferable that composition C for hard-coat layers contains fillers other than an antiviral agent. Thereby, the haze value mentioned above becomes more easy to be satisfied. Examples of the filler include inorganic fine particles such as silica, calcium carbonate, aluminum hydroxide, magnesium hydroxide, clay, talc, and titanium dioxide; organic microparticles|fine-particles, such as an acrylic resin, a polystyrene resin, a polyethylene resin, and an epoxy resin; and fine particles composed of a silicon-containing compound having an intermediate structure between inorganic and organic (for example, Tospearl series manufactured by Momentive Performance Materials Japan, which is a fine particle of silicone resin), and the like. These fillers may be used individually by 1 type, and may be used in combination of 2 or more type.

The fine particles made of the acrylic resin include, for example, a homopolymer of methyl methacrylate, a copolymer of methyl methacrylate and a monomer such as vinyl acetate, styrene, methyl acrylate, and ethyl (meth) acrylate. can be heard of

As a shape of a filler, fixed shapes, such as a spherical shape, or a non-specified shape may be sufficient, and it can select suitably so that a desired haze value may be obtained. From a viewpoint of exhibiting more anti-glare property, it is preferable to use amorphous inorganic type microparticles|fine-particles (for example, amorphous silica), and it is preferable to use spherical organic type microparticles|fine-particles from a viewpoint of coexistence of anti-glare property and high definition property.

It is preferable that the average particle diameter of a filler is 0.1 micrometer or more, It is more preferable that it is 0.3 micrometer or more, It is especially preferable that it is 0.5 micrometer or more, Furthermore, it is preferable that it is 1.0 micrometer or more. Moreover, it is preferable that it is 10 micrometers or less, and, as for the average particle diameter of a filler, it is more preferable that it is 8.0 micrometers or less, It is especially preferable that it is 5.0 micrometers or less, Furthermore, it is preferable that it is 3.0 micrometers or less. When the average particle diameter of a filler exists in said range, the haze value mentioned above becomes more easy to be satisfied. Moreover, inhibition of the antiviral action by an antiviral agent is suppressed. In addition, the average particle diameter of a filler shall be measured according to the centrifugal sedimentation light transmission method.

The content of the filler with respect to 100 parts by mass of the active energy ray-curable component is preferably 1.0 parts by mass or more, more preferably 3.0 parts by mass or more, particularly preferably 5.0 parts by mass or more, and further preferably 10 parts by mass or more. . Moreover, it is preferable that content of the filler with respect to 100 mass parts of active energy ray-curable components is 50 mass parts or less, It is more preferable that it is 30 mass parts or less, It is especially preferable that it is 20 mass parts or less, Furthermore, it is 15 mass parts or less desirable. When content of a filler exists in said range, it becomes easy to satisfy|fill the above-mentioned haze value. Moreover, inhibition of the antiviral action by an antiviral agent is suppressed.

(1-4) Photoinitiator

When using an ultraviolet-ray for hardening of the said active energy ray-curable component, it is preferable that the composition C for hard-coat layers contains a photoinitiator. By containing a photoinitiator, an active energy ray-curable component can be polymerized efficiently, and polymerization hardening time and the irradiation amount of an ultraviolet-ray can be decreased.

Examples of the photopolymerization initiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl Phenylketone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one, 4-(2-hydroxyethoxy)phenyl-2-(hydroxy-2 -Propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tert-butylanthraquinone, 2 -Aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethyl ketal, acetophenone dimethyl ketal, p -Dimethylaminobenzoic acid ester, oligo[2-hydroxy-2-methyl-1[4-(1-methylvinyl)phenyl]propanone], 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, etc. can be heard These may be used independently and may be used in combination of 2 or more type.

It is preferable that content of the photoinitiator in the composition C for hard-coat layers is 0.01 mass part or more as a lower limit with respect to 100 mass parts of active energy ray-curable components, It is especially preferable that it is 0.1 mass part or more, Furthermore, it is 1 mass part or more. it is preferable Moreover, as an upper limit, it is preferable that it is 20 mass parts or less, It is especially preferable that it is 10 mass parts or less, Furthermore, it is preferable that it is 5 mass parts or less.

(1-5) Leveling agent

It is also preferable that the coating composition C which concerns on this embodiment contains a leveling agent. Thereby, the hard-coat layer 12 formed does not have a stripe-shaped defect, a nonuniformity, etc., becomes a thing uniform in film thickness, and shows the outstanding optical property and an external appearance.

As a leveling agent, a silicone type leveling agent, a fluorine type leveling agent, an acrylic type leveling agent, a vinyl type leveling agent etc. are mentioned, for example, Among them, from a viewpoint of leveling property and compatibility with another component, a silicone type leveling agent or a fluorine type leveling agent Leveling agents are preferred. Moreover, a leveling agent may be used individually by 1 type, and may be used in combination of 2 or more type.

The thing modified|denatured may be sufficient as a leveling agent, and the thing which is not modified|denatured may be sufficient as it. Moreover, what has a reactive group may be sufficient as a leveling agent, and the thing which does not have a reactive group may be sufficient as it.

It is preferable that content of the leveling agent with respect to 100 mass parts of active energy ray-curable components is 0.01 mass part or more, It is especially preferable that it is 0.05 mass part or more, Furthermore, it is preferable that it is 0.1 mass part or more. Moreover, it is preferable that the said content is 5.0 mass parts or less, It is especially preferable that it is 3.0 mass parts or less, Furthermore, it is preferable that it is 1.0 mass parts or less.

(1-6) Other ingredients

The coating composition C in this embodiment may contain various additives other than said component. Various additives include, for example, a dispersant, an antifouling agent, a ultraviolet absorber, an antioxidant, a light stabilizer, an antistatic agent, a silane coupling agent, an antiaging agent, a thermal polymerization inhibitor, a colorant, a surfactant, a storage stabilizer, a plasticizer, a lubricant.劑), an antifoaming agent, and the like.

(2) thickness

It is preferable that it is 0.5 micrometer or more, and, as for the thickness of the hard-coat layer 12, it is more preferable that it is 1.0 micrometer or more, It is especially preferable that it is 1.5 micrometers or more, Furthermore, it is preferable that it is 2.0 micrometers or more. Thereby, while the functions as hard coatings, such as abrasion resistance, are fully exhibited, antiviral property and anti-glare property are exhibited favorably. Moreover, it is preferable that it is 20 micrometers or less, and, as for the thickness of the hard-coat layer 12, it is more preferable that it is 15 micrometers or less, It is especially preferable that it is 10 micrometers or less, Furthermore, it is preferable that it is 5.0 micrometers or less. Thereby, optical properties, such as anti-glare property and light transmittance, are exhibited favorably.

1-2. base film

Although it does not specifically limit as the base film 11, It is preferable to use the resin film which has predetermined|prescribed transparency. Examples of such a resin film include polyester films such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene films and polypropylene films, cellophane, diacetyl cellulose films, and triacetyl cellulose films. , acetyl cellulose butyrate film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, polymethylpentene film, polysulfone film, polyether ether Ketone film, polyethersulfone film, polyetherimide film, fluororesin film, polyamide film, acrylic resin film, polyurethane resin film, norbornene-based polymer film, cyclic olefin-based polymer film, cyclic conjugated diene-based polymer film, vinyl Resin films, such as an alicyclic hydrocarbon polymer film, or those laminated|multilayer films are mentioned. Especially, a polyethylene terephthalate film, a polycarbonate film, a triacetyl cellulose film, a norbornene-type polymer film, etc. are preferable from points, such as mechanical strength.

In addition, in the said base material 11, in order to improve the adhesiveness with the layer provided on the surface, if desired, it can surface-treat on one side or both surfaces by a primer treatment, an oxidation method, an unevenness|corrugation method, etc. Examples of the oxidation method include corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone/ultraviolet treatment, and the like, and examples of the unevenness method include sandblasting method and solvent treatment method. Although these surface treatment methods are suitably selected according to the kind of base material 11, in general, the surface of the effect of adhesive improvement, operability, etc., a corona discharge treatment method is used preferably.

Although the thickness of the base material 11 is not specifically limited, When a touchscreen application is considered, it is preferable that it is 25 micrometers or more, It is especially preferable that it is 38 micrometers or more, Furthermore, it is preferable that it is 50 micrometers or more. Moreover, it is preferable that the thickness of the base material 11 is 500 micrometers or less, It is especially preferable that it is 400 micrometers or less, Furthermore, it is preferable that it is 300 micrometers or less.

1-3. other factors

(1) anti-reflection layer

As shown in FIG. 2, the hard-coat film 1 which concerns on this embodiment is a surface on the opposite side to the base material 11 in the hard-coat layer 12, In particular, it is an antireflection layer on the outermost surface of the hard-coat film 1 (13) may be provided. Thereby, the hard coat film 1 which concerns on this embodiment can exhibit not only anti-glare property but antireflection property, and when it uses for a display, the visibility of an image and a video|video can be improved more. In addition, the antireflection layer 13 is a very thin layer compared to the hard coat layer 12, and even if such an antireflection layer 13 is present on the hard coat layer 12, the antiviral agent contained in the hard coat layer 12 The antiviral function is exhibited without any problem.

The antireflection layer 13 can exhibit antireflection properties by having a refractive index lower than the refractive index of the hard coat layer 12 . Therefore, the antireflection layer 13 is formed by a composition (composition for antireflection layer) using a binder resin having a low refractive index (for example, a fluorine-based binder such as a fluorine-containing acrylate or a silicone-based binder such as a silicone resin), or It is preferable that the composition for an antireflection layer (reflection prevention layer 13) contains low refractive index particle|grains other than a binder resin.

In the case of the antireflection layer 13 containing low-refractive-index particle|grains, as binder resin, the thing similar to the active-energy-ray-curable component in the hard-coat layer 12 can be used.

As low-refractive-index particles, for example, it is preferable to use hollow silica fine particles, porous silica fine particles, and the like, and among these, hollow silica fine particles are preferable. The hollow silica fine particles may be modified with an organic substance for the purpose of improving dispersibility or the like. Moreover, it is also preferable that the hollow silica fine particles are in the form of an organosol (colloidal) (hollow silica sol).

The hollow silica fine particles have fine voids in the fine particles in an open state or a closed state. Since the hollow silica fine particles are filled with gas (air) in the voids, the refractive index is relatively low. Therefore, by using these fine particles, the refractive index of the antireflection layer 13 can be effectively reduced without impairing the transparency of the antireflection layer 13 . The hollow silica fine particles may have closed cells, may have open cells, or may have both closed cells and open cells.

The average particle diameter of the low-refractive-index particles is preferably 5 nm or more from the viewpoint of exhibiting a low refractive index, particularly preferably 10 nm or more, and further preferably 30 nm or more. In addition, from the viewpoint of exhibiting antiviral and anti-glare properties by the hard coating layer 12, the average particle diameter of the low-refractive index particles is preferably 300 nm or less, particularly preferably 200 nm or less, and further preferably 100 nm or less. do. In addition, the average particle diameter of the low-refractive-index particle|grains in this specification shall be measured according to the centrifugal sedimentation light transmission method.

The content of the low-refractive-index particles is preferably 10 parts by mass or more, particularly preferably 25 parts by mass or more, and further preferably 50 parts by mass or more with respect to 100 parts by mass of the binder resin (active energy ray-curable component). Moreover, it is preferable that the said content is 300 mass parts or less with respect to 100 mass parts of said binder resins, It is especially preferable that it is 200 mass parts or less, Furthermore, it is preferable that it is 90 mass parts or less. When content of low-refractive-index particle|grains is the said range, it becomes easy to form the antireflection layer 13 which has a desired refractive index.

The composition for antireflection layers may contain the various additives similar to the coating composition C of the hard-coat layer 12 other than said component. In particular, when the antireflection layer 13 is located in the outermost surface of the hard coat film 1, it is also preferable that the composition for antireflection layers 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. Especially, it is preferable to use a fluorine-type antifouling|stain-resistant agent from a viewpoint of making it difficult to adhere a fingerprint or a stain|pollution|contamination. In addition, as the fluorine-based antifouling agent, an active energy ray-curable component as a binder resin, specifically, a fluorine-based resin having a (meth)acrylate group capable of polymerization with a polyfunctional (meth)acrylate-based monomer or (meth)acrylate-based prepolymer is preferable. do.

It is preferable that content of the antifouling agent in the composition for antireflection layers is 3 mass parts or more with respect to 100 mass parts of binder resin (active energy ray-curable component), It is especially preferable that it is 5 mass parts or more, Furthermore, it is 10 mass parts more preferably. Moreover, it is preferable that content of the said antifouling agent is 30 mass parts or less, It is especially preferable that it is 25 mass parts or less, Furthermore, it is preferable that it is 20 mass parts or less.

The thickness of the antireflection layer 13 is preferably 0.01 µm or more, more preferably 0.03 µm or more, particularly preferably 0.06 µm or more, and further preferably 0.08 µm or more. Thereby, while becoming easy to achieve low reflectance, it becomes the thing excellent also in abrasion resistance. The thickness of the antireflection layer 13 is preferably 1 µm or less, more preferably 0.5 µm or less, particularly preferably 0.3 µm or less, and further preferably 0.2 µm or less. Thereby, the antiviral property and anti-glare property by the hard-coat layer 12 are exhibited favorably.

(2) adhesive layer

The hard coat film 1 which concerns on this embodiment may equip the surface side opposite to the hard coat layer 12 in the base material 11 with an adhesive layer. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited, and a known pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, or a silicone-based pressure-sensitive adhesive may be used, and an pressure-sensitive adhesive having a predetermined transparency is preferably used.

In addition, when the hard coat film 1 which concerns on this embodiment is equipped with the adhesive layer mentioned above, the hard coat film 1 which concerns on this embodiment is the opposite side to the base material 11 in the said adhesive layer. A release film may be laminated|stacked on the surface. The release film is not particularly limited as long as it has desired releasability on the release surface (surface in contact with the pressure-sensitive adhesive layer), and a known release film such as one in which one side of the resin film is subjected to release treatment with a release agent can be used. .

2. Manufacturing method of hard coating film

The hard coating film 1 according to the present embodiment is a coating composition for the hard coating layer 12, preferably a coating composition C, and a coating solution containing a solvent as desired is applied to the base film 11, , it can be prepared by curing to form the hard coating layer 12 .

A solvent can be used for improvement of coatability, viscosity adjustment, adjustment of solid content concentration, etc., and if each component melt|dissolves or disperse|distributes, it can use without limitation in particular. Specific examples of the solvent include alcohols such as methanol, ethanol, isopropanol, butanol, and octanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; esters such as ethyl acetate, butyl acetate, ethyl lactate, and γ-butyrolactone; ethers such as ethylene glycol monomethyl ether (methyl cellosolve), ethylene glycol monoethyl ether (ethyl cellosolve), diethylene glycol monobutyl ether (butyl cellosolve), and propylene glycol monomethyl ether; aromatic hydrocarbons such as benzene, toluene, and xylene; Amides, such as dimethylformamide, dimethylacetamide, and N-methylpyrrolidone, etc. are mentioned.

The coating composition of the coating composition may be applied according to a conventional method, for example, a bar coating method, a knife coating method, a roll coating method, a blade coating method, a die coating method, or a gravure coating method. When the coating liquid of the coating composition is applied, 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 to which the coating composition is applied has no stripe-shaped defects or unevenness, and therefore, the hard coating layer 12 having a uniform film thickness and excellent appearance can be formed

When a coating composition is active-energy-ray-curable like coating composition C, hardening of a coating composition is performed by irradiating active energy rays, such as an ultraviolet-ray and an electron beam, with respect to the coating film of a coating composition. Ultraviolet irradiation can be performed by a high pressure mercury lamp, a fusion H lamp, a xenon lamp, etc., The irradiation amount of an ultraviolet-ray is 50-1000mW/cm<2> of illumination intensity, and about 50-1000mJ/cm<2> of light quantity is preferable. On the other hand, electron beam irradiation can be performed with an electron beam accelerator etc., The irradiation amount of an electron beam is preferably about 10-1000 krad.

Irradiation of an active energy ray to the coating film of the said coating composition can be performed in air atmosphere or inert gas atmosphere. When forming the antireflection layer 13 on the hard coat layer 12, the adhesiveness with the antireflection layer 13 can be improved by hardening in an air atmosphere. On the other hand, depending on the kind of active energy ray-curable component, by performing active energy ray irradiation in an inert gas atmosphere, a coating composition hardens favorably, without receiving oxygen inhibition. Thereby, the hard-coat layer 12 formed becomes a thing more excellent in abrasion resistance.

As an inert gas, nitrogen, argon, helium etc. are mentioned, for example, Among these, nitrogen and argon are preferable and nitrogen is especially preferable. 5 % or less is preferable, as for the oxygen concentration in an inert gas atmosphere, 3 % or less is more preferable, and its 2 % or less is especially preferable.

In the case of the hard coat film 1 shown in FIG. 2 , after forming the hard coat layer 12 as described above, the antireflection layer 13 may be formed on the exposed surface of the hard coat layer 12 . The antireflection layer 13 can be formed in the same manner as the hard coat layer 12 . However, it is preferable to perform hardening of the composition for antireflection layers in an inert gas atmosphere. Thereby, the hardness of the antireflection layer 13 to be formed can be raised and it can be made into the thing excellent in abrasion resistance.

3. Physical properties of hard coating film, etc.

(1) total light transmittance

It is preferable that it is 80 % or more, as for the total light transmittance of the hard-coat film 1 which concerns on this embodiment, it is more preferable that it is 85 % or more, It is especially preferable that it is 90 % or more. When a total light transmittance is said value, transparency is very high and it is especially suitable as an optical use (for display body). In addition, the measuring method of a total light transmittance is as showing to the test example mentioned later.

(2) image sharpness

It is preferable that the sum total value of the image sharpness (%) of the optical comb of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm measured based on JISK7374:2007 of the hard-coat film 1 is 200 or more, and 300 It is more preferable that it is more than it, and it is especially preferable that it is 350 or more, Furthermore, it is preferable that it is 400 or more. Thereby, the visibility of an image and a video|video in a display becomes favorable.

On the other hand, it is preferable that the total value of the said image clarity (%) is 480 or less, It is more preferable that it is 470 or less, It is especially preferable that it is 460 or less, Furthermore, it is preferable that it is 450 or less. Thereby, while the visibility of the image/video in a display is maintained favorably, anti-glare property is exhibited favorably.

Here, the image sharpness is measured through an optical comb having a transmitting portion and a light blocking portion for the amount of light of the parallel light passing through the test body. The smaller the width (comb width) between the transmissive part and the light-shielding part in the optical comb, the higher the image clarity. Image sharpness is measured according to the transmission method of JISK7374:2007. A specific measuring method is as showing in the test example mentioned later.

(3) 60° specular gloss

The surface of the hard-coat layer 12 side in the hard-coat film 1 which concerns on this embodiment (the exposed surface of the hard-coat layer 12 or the exposed surface of the antireflection layer 13; Hereinafter, "of the hard-coat film 1 The 60° specular gloss (gloss value) of the surface”) is preferably 30% or more, more preferably 50% or more, and particularly preferably 70% or more from the viewpoint of preventing fading. Moreover, it is preferable that it is 150 % or less from a viewpoint of providing anti-glare property, and, as for the 60 degree mirror glossiness of the hard-coat film 1, it is especially preferable that it is 110 % or less, Furthermore, it is preferable that it is 90 % or less. In addition, the measuring method of the 60 degree mirror glossiness in this specification is as showing in the test example mentioned later.

(4) pencil hardness

It is preferable that it is F or more, and, as for the pencil hardness of the surface of the hard-coat film 1 which concerns on this embodiment, it is preferable that it is especially H or more, Furthermore, it is preferable that it is 2H or more. When the antireflection layer 13 has such pencil hardness, the surface of the hard coat film 1 will have sufficient hardness, and the outstanding abrasion resistance can be exhibited. Although the upper limit of the said pencil hardness is not specifically limited, It is preferable that it is 6H or less. In addition, the measuring method of pencil hardness is as showing to the test example mentioned later.

(5) reflectance

When the hard coat film 1 which concerns on this embodiment has the reflection prevention layer 13 as shown in FIG. 2, it is preferable that the reflectance in the surface of the hard coat film 1 is 3.0 % or less, and 2.7 % or less is more preferable, particularly preferably 2.5% or less, and further preferably 2.3% or less. Accordingly, in the display in which the hard coating film 1 is used, it is possible to reduce the reflection of external light and improve the visibility of the image or video. Although it does not specifically limit about the lower limit of the said reflectance, Usually, it is preferable that it is 0.1 % or more, It is more preferable that it is 0.2 % or more, It is especially preferable that it is 0.5 % or more. In addition, the measuring method of the reflectance in this specification is as showing to the test example mentioned later.

(6) antiviral activity level

It is preferable that the antiviral activity value of the hard coat film 1 which concerns on this embodiment is 1.0 or more, It is more preferable that it is 1.5 or more, It is especially preferable that it is 2.0 or more. In addition, the measuring method of the antiviral activity level in this specification is as showing in the test example mentioned later.

4. Use of hard coating film

The hard coat film 1 which concerns on this embodiment can be used as a surface layer of various displays (display body), such as a liquid crystal display, an organic electroluminescent display, and a touch panel, for example. Specifically, it is preferable to be laminated on a cover material in a display having a display module such as a liquid crystal (LCD) module, a light emitting diode (LED) module, and an organic electroluminescence (organic EL) module. . It is preferable to perform lamination|stacking to the cover material of the hard-coat film 1 by sticking through the adhesive layer mentioned above.

5. Display with hard coating film

By laminating|stacking the hard-coat film which concerns on embodiment demonstrated above on a display main body, the display with a hard-coat film can be obtained. Specifically, the display with a hard coat film is provided with a hard coat film and a display main body, and the base film side in the said hard coat film is laminated|stacked on the display surface side in the said display main body. The hard coat film may be laminated|stacked directly on the display surface of a display main body, or may be laminated|stacked on the display surface side of a display main body through other members and layers.

The embodiments described above are described in order to facilitate understanding of the present invention, and are not described in order to limit the present invention. Accordingly, each element disclosed in the above embodiment is intended to include all design changes and equivalents falling within the technical scope of the present invention.

For example, between the base film 11 and the hard-coat layer 12 in the hard-coat film 1, another layer may interpose. In addition, the hard-coat layer 12 may be provided in the both surfaces side of the base film 11. In addition, when a hard-coat layer is provided in the both surfaces of the base film 11, one hard-coat layer is the hard-coat layer 12 in this embodiment, and the other hard-coat layer is a normal hard-coat layer which does not contain an antiviral agent. A coating layer may be sufficient.

(Example)

Hereinafter, the present invention will be described in more detail by way of examples and the like, but the scope of the present invention is not limited to these examples and the like.

[Example 1]

6.5 g of sodium molybdate dihydrate was dissolved in 100 ml of ion-exchanged water. Further, 9.1 g of silver nitrate was dissolved in 100 ml of ion-exchanged water. It was dripped at the aqueous solution of sodium molybdate dihydrate over 30 minutes, stirring the aqueous solution of silver nitrate, and the precipitate was obtained. Further, after stirring for 1 hour, the precipitate was filtered and washed with ion-exchanged water, and then sufficiently dried at 100°C. Then, the precipitate was sufficiently crushed with a mortar to obtain about 10 g of a yellowish-white powder.

An organic-inorganic hybrid resin as an active energy ray-curable component (manufactured by Arakawa Chemical Industry Co., Ltd., product name "Opstar Z7530", silica fine particles having an average particle diameter of 50 nm (CV value: 28%)) bonded to an acryloyl group and polyfunctionality A mixture with a (meth)acrylate-based monomer, a product containing a photopolymerization initiator) 100 parts by mass (a solid content conversion value is shown. Hereinafter, the same applies to other components), and 0.5 parts by mass of the above powder (A1) as an antiviral agent; 12.3 parts by mass of polymethyl methacrylate resin filler as a filler (manufactured by Sekisui Kasei, product name "SSX-101", average particle diameter: 1.0 µm), and a carboxyl group-containing polymer modified product as a dispersant (manufactured by Kyoeisha Chemical, product name) "Florene G-700") 0.41 parts by mass and 0.16 parts by mass of polydimethylsiloxane (Toray Dow Corning Co., Ltd., product name "SH28") as a silicone-based leveling agent are mixed in propylene glycol monomethyl ether to obtain a composition for a hard coat layer A coating solution was obtained. The composition for hard-coat layers of this system (content of antiviral agent may differ) is described as "C1" in Table 1.

On one side of a triacetyl cellulose (TAC) film as a base film (manufactured by Konica Minolta, product name "KU8UAW", thickness: 80 μm), the coating solution of the composition for a hard coating layer obtained above was applied with a Meyer bar, and applied at 70° C. for 1 minute dried.

Then, in a nitrogen atmosphere, ultraviolet rays are irradiated under the following conditions by an ultraviolet irradiation device (manufactured by EyeGraphix, product name "Eygrantage ECS-401GX type") to form a 5.0 µm-thick hard coat layer on the base film, , to obtain a hard coat film.

[Ultraviolet irradiation conditions]

·Light source: high pressure mercury lamp

·Lamp power: 2㎾

Conveyor speed: 4.23 m/min

· Illuminance: 200mW/cm2

・Light intensity: 200mJ/cm2

[Examples 2-3, 5]

Except changing the compounding quantity of an antiviral agent as shown in Table 1, it carried out similarly to Example 1, and manufactured the hard-coat film.

[Example 4]

100 parts by mass of a urethane acrylate-based prepolymer (manufactured by Arakawa Chemical Industries, Ltd., product name "Beamset 575CB") as an active energy ray-curable component, and hollow silica sol as low-refractive-index particles (manufactured by Nikkishoku Bai Chemical, product name "Sururia 4320") , average particle diameter: 60 nm) 51.3 parts by mass, 10 parts by mass of a fluorine-based resin having a (meth)acrylate group at one end as an antifouling agent (manufactured by Fluoro Technology, product name "FS-7025"), and 2 as a photoinitiator -Methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one 3 parts by mass is mixed in 1:1 (mass ratio) mixed solvent of cyclohexanone and methyl isobutyl ketone Thus, a coating solution of the composition for an antireflection layer was obtained.

The coating solution of the composition for antireflection layer obtained was applied to the exposed surface of the hard coat layer in the hard coat film obtained by carrying out similarly to Example 3 except having changed to nitrogen atmosphere and irradiated with ultraviolet rays under an air atmosphere with a Meyer bar, and applied at 90 ° C. It was dried for 1 minute.

Then, ultraviolet rays were irradiated under the following conditions with an ultraviolet irradiation device (manufactured by EyeGraphics, product name "Eygrantage ECS-401GX model") in a nitrogen atmosphere to form an antireflection layer with a thickness of 0.1 µm. Thereby, the hard-coat film formed by laminating|stacking a base film, a hard-coat layer, and an antireflection layer in this order was obtained.

[Ultraviolet irradiation conditions]

·Light source: high pressure mercury lamp

·Lamp power: 2㎾

Conveyor speed: 4.23 m/min

· Illuminance: 300mW/cm2

・Light intensity: 250mJ/㎠

[Example 6]

100 parts by mass of dipentaerythritol hexaacrylate as an active energy ray-curable component, 14 parts by mass of amorphous silica fine particles (average particle diameter 0.8 µm) as a filler, 0.5 parts by mass of the above powder (A1) as an antiviral agent, and a fluorine-based leveling agent 0.2 parts by mass of a polymerizable group-containing fluorinated adamantane derivative (Neos Co., Ltd., product name "Ftergent 602A") and 4.0 parts by mass of 1-hydroxycyclohexylphenyl ketone as a photoinitiator, The coating liquid of the composition for hard-coat layers was obtained. The composition for hard-coat layers of this system is described as "C2" in Table 1.

Using the coating liquid of the obtained composition for hard-coat layers, except forming a 4.0-micrometer-thick hard-coat layer, it carried out similarly to Example 1, and produced the hard-coat film.

[Example 7]

100 parts by mass of a urethane acrylate-based prepolymer as an active energy ray-curable component (manufactured by Arakawa Chemical Industry Co., Ltd., product name "Beamset 575CB", a product containing a photoinitiator), and 12 parts by mass of amorphous silica fine particles (average particle diameter of 1.5 µm) as a filler; , 0.5 parts by mass of the powder (A1) as an antiviral agent, and 0.2 parts by mass of polydimethylsiloxane (Toray Dow Corning, product name "SH28") as a silicone-based leveling agent, mixed in propylene glycol monomethyl ether, the composition for a hard coating layer of the coating solution was obtained. The composition for a hard coat layer of this system (the type and content of the antiviral agent may be different) is denoted as "C3" in Table 1.

On one side of a polyethylene terephthalate film as a base film (manufactured by Toyobo Corporation, product name "PET188U403", thickness: 188 μm), the coating solution of the composition for a hard coat layer obtained above was applied with a Meyer bar, and dried at 70° C. for 1 minute.

Then, in a nitrogen atmosphere, ultraviolet rays are irradiated under the following conditions by an ultraviolet irradiation device (manufactured by Eye Graphics, product name "Eygrantage ECS-401GX type") to form a hard coat layer with a thickness of 3.5 µm on the substrate, A hard coat film was obtained.

[Ultraviolet irradiation conditions]

·Light source: high pressure mercury lamp

·Lamp power: 2㎾

Conveyor speed: 4.23 m/min

· Illuminance: 300mW/cm2

・Light intensity: 250mJ/㎠

[Comparative Example 1]

As an antiviral agent, in place of the powder (A1), a silver-containing filler (manufactured by Toyochem, product name "Rioduras AMB-400 WH") (A2) was used in 5.0 parts by mass, except for using 5.0 parts by mass of a hard coating in the same manner as in Example 7 A film was made.

[Comparative Example 2]

As the antiviral agent, in the same manner as in Example 7, except that 5.0 parts by mass of an ether-based organic compound powder (manufactured by Sekisui Materials, product name "Wiltaker IV") (A3) was used instead of the above-mentioned powder (A1) as an antiviral agent. A hard coat film was prepared.

[Test Example 1] (Measurement of haze value)

About the hard-coat film manufactured by the Example and the comparative example, haze value (%) was measured according to JISK7136:2000 using the haze meter (The Nippon Denshoku Kogyo Co., Ltd. make, product name "NDH5000"). A result is shown in Table 2.

[Test Example 2] (Measurement of total light transmittance)

About the hard coat film manufactured by the Example and the comparative example, the total light transmittance (%) was measured according to JISK7361-1:1997 using the haze meter (The Nippon Denshoku Kogyo Co., Ltd. make, product name "NDH5000"). A result is shown in Table 2.

[Test Example 3] (Measurement of image sharpness)

About the hard coat film manufactured by the Example and the comparative example, five types of optical combs were used based on the transmission method of JISK7374:2007 using the image-finishing meter (made by Sugashi Kenki Corporation, product name "ICM-10P"). The image sharpness (%) of (comb width: 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm) was measured, and the total value was computed. A result is shown in Table 2.

[Test Example 4] (Measurement of 60° specular gloss)

About the hard-coat film in an Example and a comparative example, 60 degree specular glossiness (glossy value, %) was measured according to JIS Z8741-1997 using the gloss meter (made by a Nippon Denshoku Kogyo Co., Ltd.). A result is shown in Table 2.

[Test Example 5] (Measurement of reflectance)

The surface by the side of the base film of the hard coat film manufactured in Example 4 was affixed on the single side|surface of the black plate (The Yuko Shokai company make, product name "acrylite") through a double-sided adhesive sheet. Then, the reflectance (%) of the surface (exposed surface of the antireflection layer) of the hard coat film was measured using an ultraviolet-visible-near-infrared spectrophotometer (manufactured by Shimadzu Corporation, product name “UV-3600”), the measurement wavelength range It measured as 380-780 nm. A result is shown in Table 2.

[Test Example 6] (Evaluation of anti-glare properties)

The surface by the side of the base film of the hard-coat film manufactured by the Example and the comparative example was affixed on the single side|surface of the black plate (The Yuko Shokai company make, product name "acrylite") through a double-sided adhesive sheet. About the laminated body of the obtained hard-coat film and a black plate, the 3-wavelength fluorescent lamp was made to light above the said laminated body, and the light was reflected by the hard-coat film. The said reflected light was visually observed and the following reference|standard evaluated anti-glare property. A result is shown in Table 2.

(double-circle): The outline of the fluorescent lamp visually recognized by reflection in a hard-coat film was faint.

(circle): The outline of the fluorescent lamp visually recognized by reflection in a hard-coat film was slightly faint.

x: The outline of the fluorescent lamp visually recognized by reflection in a hard-coat film was not blurred.

[Test Example 7] (Measurement of pencil hardness)

About the surface of the hard-coat film manufactured by the Example and the comparative example, according to JISK5600, pencil hardness was measured. Specifically, on the surface of the hard coat film, pencils (manufactured by Mitsubishi Enfits Co., Ltd., product name "Mitsubishi Enfits Uni") having different hardness of the pencil lead were moved 7 mm or more at a load of 750 g and an angle of 45 ° A test was performed. The said test was done 5 times, and the hardness of the pencil lead which did not damage the film surface 4 times or more was made into the pencil hardness of the surface of the said hard-coat film. A result is shown in Table 2.

[Test Example 8] (evaluation of scratch resistance)

About the surface of the hard-coat film manufactured by the Example and the comparative example, 10 cm and 10 reciprocation were rubbed by the load of 250 g/cm<2> using the steel wool of #0000. The surface of the hard coat film was visually confirmed under a 3-wavelength fluorescent lamp, and the following references|standards evaluated abrasion resistance. A result is shown in Table 2.

(double-circle): The number of flaws was 3 or less.

(circle): The number of flaws was 4 or more and 10 or less.

x: The number of flaws was 11 or more.

[Test Example 9] (Antiviral test)

The virus species of the antiviral test was a seasonal influenza A virus (with an envelope) and a feline calicivirus (without an envelope), and based on ISO 21702, the hard coat film produced in Examples and Comparative Examples was antiviral A sex test was performed. Specifically, it is as follows.

A virus suspension of a predetermined concentration was prepared by infecting a host cell with a virus and culturing it. Put the hard coat film (5 cm x 5 cm; measurement sample) prepared in Examples and Comparative Examples in a petri dish, put 0.4 mL of virus suspension on the surface of the hard coat film, and virus suspension over the entire surface of the hard coat film It coat|covered with the polyethylene film (4 cm x 4 cm) so that it might spread to.

After storing the petri dish in a constant temperature and humidity for a predetermined time, it was washed with SCDLP medium, and the washing solution was serially diluted with EMEM medium. Then, the virus infectivity titer of these dilutions was measured by the plaque measurement method. Instead of the hard coat film, a polyethylene film (5 cm x 5 cm; standard sample) was used as an object, and the virus infectivity titer was measured in the same manner as above. The difference between the virus infectivity titer of the measured standard sample and the virus infectivity titer of the measurement sample was calculated as a log value, and this was set as the antiviral activity value. A result is shown in Table 2.

[Table 1]

[Table 2]

As is clear from Table 2, the hard-coat film manufactured in the Example showed the outstanding antiviral property also about any of the virus which has an envelope, and the virus which does not have an envelope. Moreover, the hard-coat film manufactured in the Example was also excellent in anti-glare property.

The hard coat film of this invention is used suitably as the surface layer of a touchscreen etc. by which antiviral property and anti-glare property are calculated|required.

1: Hard coating film
11: base film
12: hard coating layer
13: anti-reflection layer

Claims (9)

A hard coat film comprising a base film and a hard coat layer provided on at least one surface side of the base film,
The hard coating layer contains an antiviral agent,
Haze value is 3.0 % or more and 30 % or less, The hard coat film characterized by the above-mentioned. According to claim 1,
The hard coating film, characterized in that the antiviral agent is a molybdenum-based compound. According to claim 1,
Content of the said antiviral agent in the said hard-coat layer is 0.01 mass % or more and 30 mass % or less, The hard-coat film characterized by the above-mentioned. According to claim 1,
The said hard-coat layer contains fillers other than the said antiviral agent, The hard-coat film characterized by the above-mentioned. According to claim 1,
Total light transmittance is 80% or more, The hard coat film characterized by the above-mentioned. According to claim 1,
The total values of the image sharpness of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm of optical combs are 200 or more and 480 or less, The hard coat film characterized by the above-mentioned. According to claim 1,
The surface pencil hardness of the said hard-coat layer side is F or more, The hard-coat film characterized by the above-mentioned. According to claim 1,
The thickness of the said hard-coat layer is 0.5 micrometer or more and 20 micrometers or less, The hard-coat film characterized by the above-mentioned. 9. The method according to any one of claims 1 to 8,
Hard coating film, characterized in that it is for optics.

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