CN1904646A - Surface material for display and display with the same - Google Patents

Abstract

The present invention relates to a surface material for a display. The surface material (10) for a display has an anti-glare layer (14; 14, 16) provided on a transparent substrate (11), and the anti-glare layer has resin-made concavo-convex portions on the surface (13). The contact angle of the flat film formed of the above resin with an oleic acid droplet is 60 degrees or less. The present invention also relates to a display having the surface material for a display.

Description

Surface material for display and display with same

technical field

The present invention relates to a surface material for a display, and a display having the surface material for a display, the surface material for a display is provided on display displays such as glass casings and plastic casings, and image displays such as personal computers, televisions, and mobile phones. surface.

Background technique

In this kind of display, if the light from the outside is reflected on the surface (display surface) without scattering, the image will be reflected there, and it is difficult to see the internal image. Diffuse anti-glare film.

However, when using the display, since the finger touches the surface, fingerprints (hereinafter simply referred to as "fingerprints") produced by lipid components derived from living organisms such as sebum will adhere to the surface, and the visibility of the image ( cognition) are easily impaired. For this reason, countermeasures for preventing fingerprints from adhering to the display surface have been proposed. For example, an antiglare film is disclosed in which a resin layer is laminated on a transparent base film, and an antiglare layer having antifouling properties is formed thereon (for example, refer to Patent Document 1). The anti-glare layer with anti-fouling properties contains fluorine-modified compounds, and the contact angle with glyceryl triacetate is greater than 43 degrees.

Patent Document 1: Japanese Patent Laid-Open No. 2000-194272 (2nd and 4th pages)

The above-mentioned antifouling layer formed of a fluorine-containing compound has advantages in that since its surface free energy is low, the amount of adhering fingerprints is reduced, and the adhering fingerprints are easily wiped off. However, the anti-glare layer contains fluorine-containing compounds, and the contact angle with glycerol triacetate is greater than 43 degrees, so the lipid components from living organisms that are used to form fingerprints attached to the anti-glare layer easily form tiny droplets, Such tiny droplets are an important reason why attached fingerprints are seen, and the point that light is diffusely reflected on the tiny droplets and fingerprints are clearly visible on the display surface has not yet been improved. Therefore, there is a problem that the visibility of the displayed image on the display is reduced.

Contents of the invention

The object of the present invention is to provide a surface material for a display and a display having the surface material for a display. The surface material for a display has an anti-glare function and a function of making fingerprints adhering to the surface difficult to be seen, thereby improving visibility.

For fingerprints attached to the surface of the display, lipid components from living organisms form tiny droplets on the surface, and light is diffusely reflected by the tiny droplets, so that the fingerprints are seen by the eyes. Therefore, thinking about it from another angle: if the micro-droplets are not formed even if the lipid components from the living body are attached, for example, the surface of the display is in a wet state, fingerprints can be hardly noticeable visually. That is to say, if based on the surface irregularities for showing anti-glare properties, reduce the adhesion of lipid components from organisms, and make the material that constitutes the surface with irregularities and lipid components from organisms It is easy to fuse, absorbs more lipid components from living organisms through the siphon phenomenon (capillary phenomenon), and can effectively prevent the attached fingerprints from being conspicuous. Thus, the present invention has been completed.

The surface material for displays according to the first aspect of the present invention is a surface material for displays arranged on the surface of a display and used, and is characterized in that it is formed by providing an anti-glare layer on a transparent base material. The surface made of the resin has concavo-convex parts, and the contact angle of the flat film made of the resin with the oleic acid droplet is 60 degrees or less.

According to the present invention, the following effects can be obtained.

In the surface material for a display of the present invention, the antiglare layer formed of resin and having unevenness on the surface changes the reflection direction of light and scatters it, suppresses reflected light entering the eyes, and exhibits antiglare properties. It is further speculated that since the surface has concave and convex portions, lipid components derived from living organisms that form fingerprints can be drawn to concave portions (a type of capillary) on the surface by a siphon phenomenon. In addition, it is speculated that since the contact angle between the flat film formed by the above-mentioned resin and the oleic acid droplet is set at 60 degrees or less, the resin constituting the antiglare layer is easily fused with the lipid component from the living body, and the lipid component from the living body is easily fused. The lipid components are quickly drawn to the concave parts of the surface, and the attached fingerprints are difficult to identify. Therefore, the surface material for a display has both an anti-glare function and a function of making fingerprints adhering to the surface less conspicuous, and can improve the visibility of a display image or the like.

Description of drawings

FIG. 1 is an enlarged cross-sectional view of a surface material for a display according to a preferred embodiment of the present invention.

FIG. 2( a ) to FIG. 2( c ) are modified examples of FIG. 1 .

Fig. 3(a) is a cross-sectional view of a resistive touch panel of the present invention.

Fig. 3(b) is a cross-sectional view of a resistive touch panel of the present invention.

4 is a cross-sectional view of an electromagnetic induction type touch panel.

Detailed ways

Next, preferred embodiments of the present invention will be described.

FIG. 1 shows a representative structure of a surface material 10 for a display of the present invention. The structure of the surface material 10 for a display of this embodiment is not limited to what is shown in FIG. 1, Various changes are possible. As shown in FIG. 1 , a concave-convex layer 14 having concave-convex portions 13 made of a resin containing fine particles 12 is formed on the surface of a transparent substrate 11 and an adhesive layer 15 is provided on the back. The concave-convex layer 14 functions as an antiglare layer through the concave-convex portion 13 on the surface. In this case, the resin constituting the concave-convex layer 14 has compatibility with lipid components derived from a living body.

2( a ) to FIG. 2( c ) are cross-sectional views schematically showing other examples of the surface material 10 for a display of the present invention. As shown in FIG. 2( a), in this display surface material 10, a coating layer (fingerprint fusion layer) 16 having fusion properties to lipid components from living organisms is provided on the concave-convex layer 14 in the above-mentioned FIG. 1, Other structures are the same as in Fig. 1 . As shown in Figure 2(b), the display surface material 10 forms a concave-convex layer 14 by concave-convex transfer printing, and the resin constituting the concave-convex layer 14 has compatibility with lipid components from living organisms, and other structures are the same as in Figure 1 . As shown in Figure 2 (c), the surface material 10 for the display forms a concave-convex layer 14 by concave-convex transfer printing, and a coating layer 16 is arranged on the concave-convex layer 14, and the coating layer 16 has a certain effect on lipid components from a living body. Fusibility, other structures are the same as in Figure 1. As shown in FIG. 2( a ) and FIG. 2( c ), when the coating layer 16 is provided on the concave-convex layer 14 , the anti-glare layer is constituted by the concave-convex layer 14 and the coating layer 16 .

As the above-mentioned transparent base material 11, a transparent resin sheet, a transparent resin film, a transparent glass plate, etc. can be used, and it does not specifically limit. As the resin material for forming the transparent substrate 11, specifically, poly(meth)acrylic resins, poly(meth)acrylonitrile resins, polystyrene resins, polysulfone resins, polyethersulfone resins, etc. Resins, polyether resins, polymethylpentene resins, cellulose triacetate (TAC) resins, polyethylene terephthalate (PET) resins, polyurethane resins, regenerated cellulose resins, Diacetyl cellulose resin, cellulose acetate butyrate resin, polyester resin, acrylonitrile-styrene-butadiene ternary copolymer resin, polycarbonate resin, polyether ketone resin, polychloride Vinyl resin, polyvinylidene chloride resin, polyvinyl alcohol resin, nylon resin, polyethylene resin, polypropylene resin, polyamide resin, polyimide resin, norbornene resin, etc. Among them, poly(meth)acrylic resins, polystyrene resins, cellulose triacetate (TAC) resins, polyethylene terephthalate (PET) resins are preferable from the viewpoint of general versatility and application effectiveness. resins, polycarbonate resins.

The thickness of the transparent substrate 11 is usually 10 μm to 5000 μm, preferably 25 μm to 1000 μm, more preferably 35 μm to 500 μm. When the thickness is 10 μm to 5000 μm, the handleability is good, the strength of the transparent base material 11 does not decrease, and the transparent substrate 11 does not become unnecessarily thick.

As mentioned above, the concave-convex layer 14 is formed with the concave-convex portion 13 by resin, and the contact angle between the flat film formed by the above-mentioned resin and the oleic acid droplet needs to be 60 degrees or less, preferably 50 degrees or less, more preferably 1 degree to 40 degrees. Spend. The concave-convex layer 14 may have the concave-convex portion 13 on its surface as described above, and has a good fusion property with the lipid component from the living body, or it may have the concave-convex portion 13 on the surface, and the A form of the coating layer 16 having good compatibility with lipid components derived from living organisms. Presumably, by setting the contact angle at 60 degrees or less, the resin constituting the uneven layer 14 is easily fused with the lipid component derived from the living body, and the lipid component derived from the living body is quickly drawn to the surface of the uneven layer 14 or the coating layer 16. The concave portion 13a can realize the function that attached fingerprints are hard to be seen. When the contact angle is larger than 60 degrees, the lipid component derived from the living body tends to form fine droplets, which diffusely reflects light and deteriorates the visibility of display images and the like, so it is not suitable.

For the concave-convex portion 13 on the above-mentioned surface, the arithmetic mean roughness (Ra) specified in JIS B 0601-1994 is preferably 0.05 μm to 5 μm, and the average interval (Sm) of the concave-convex portion 13 is preferably 5 μm to 500 μm. The Ra is more preferably 0.05 μm to 2 μm, the Sm is more preferably 5 μm to 500 μm, the Ra is particularly preferably 0.1 μm to 0.7 μm, and the Sm is particularly preferably 5 μm to 350 μm. When Ra is 0.05 μm to 5 μm, or when Sm is 5 μm to 500 μm, the concave-convex portion 13 does not become too small, the interval between the concave-convex portion 13 does not become too large, the anti-glare property is sufficient, and the absorption from biological The effect of the siphon phenomenon of the body's lipid components will not be reduced, and the function of preventing the obvious adhesion of fingerprints will not be reduced. Furthermore, since the unevenness|corrugation part 13 does not become large too much, and the space|interval of the unevenness|corrugation part 13 does not become narrow too much, haze value (haze) can be reduced.

The display surface material 10 can be provided with a single or multiple desired functional layers on the back of the transparent substrate 11, between the transparent substrate 11 and the concave-convex layer 14 as required, such as an adhesive layer, an ultraviolet absorbing layer, Infrared absorbing layer, anti-reflection layer, soft (shock-resistant) layer, hard coat layer, conductive layer, antistatic layer, heat insulating layer, reflective layer, primer (primer) layer and other layers.

In the case where the anti-glare layer is composed of a concave-convex layer 14 and a covering layer 16 having good fusion properties with fingerprints on the concave-convex layer 14, it is a condition that the coating layer 16 maintains the concave-convex portion 13 at a level capable of maintaining the function of the object of the present invention. , a single layer or multiple layers of desired functional layers can be provided between the concave-convex layer 14 and the coating layer 16 . Examples of such layers include ultraviolet absorbing layers, infrared absorbing layers, soft (shock-resistant) layers, hard coat layers, conductive layers, antistatic layers, heat insulating layers, reflective layers, primer layers, and the like.

Next, the covering layer 16 described above will be described based on the description. Since the fingerprint is mainly composed of oil, the covering layer 16 is a fingerprint fusion layer having good fusion property (affinity) with the fingerprint. The contact angle of an oleic acid droplet on a flat film of the above-mentioned resin was used as an index showing good fusion with fingerprints. In order to realize this function, the contact angle needs to be 60 degrees or less, preferably 50 degrees or less, more preferably 1 degree to 40 degrees. If the contact angle is 60 degrees or less, the lipid component from the living body is difficult to form fine droplets on the display surface material 10, and it is easy to absorb the lipid from the living body by the siphon phenomenon caused by the uneven part 13 on the surface. Element. Any resin can be used without particular limitation as long as it is a material having such a contact angle. As such a resin, for example, an active energy ray-curable resin, a thermosetting resin, a thermoplastic resin, or the like can be used. Among them, active energy ray-curable resins, thermoplastic resins, and the like are preferably used from the viewpoint of productivity and storage properties. Furthermore, in the present embodiment, the contact angle of the surface of the coating layer 16 is 43 degrees or less as the contact angle with triacetin.

When an active energy ray-curable resin is used as the coating agent for the coating layer 16, a polymerizable component is essential as a constituent component of the coating agent. That is, the polymerizable component can be selected from monofunctional monomers, polyfunctional monomers, oligomers having vinyl or (meth)acryloyl groups (hereinafter referred to as polymerizable oligomers) and vinyl or (meth)acryloyl oligomers. ) acryloyl-based polymers (hereinafter, referred to as polymerizable polymers) are used by selecting one or two or more. In addition, if necessary, a polymerization initiator such as a photolysis type or a thermal decomposition type, an oligomer without a vinyl group or a (meth)acryloyl group (hereinafter referred to as a non-polymerizable oligomer) may be added. ), polymers not having vinyl or (meth)acryloyl groups (hereinafter referred to as non-polymerizable polymers), metal oxides, surfactants, dilution solvents, photosensitizers, stabilizers, ultraviolet absorbers , infrared absorbers, antioxidants and other additives.

The coating layer 16 is not particularly limited as long as the contact angle between the flat film and the oleic acid droplet is 60 degrees or less. The contact angle of 60 degrees or less can be controlled by, for example, the type and amount of the monofunctional monomer or metal oxide. Use of polymerizable oligomers, polymerizable polymers, non-polymerizable oligomers, or non-polymerizable polymers (these two types of oligomers and two types of polymers are collectively referred to as "each oligomer or each polymer" ), the type and amount of the monofunctional monomer constituting "each oligomer or each polymer" may be considered in terms of the level of the monofunctional monomer.

For example, in a combination of a monofunctional monomer and a polyfunctional monomer not using "each oligomer or each polymer" and a metal oxide, the amount of the monofunctional monomer is only sufficient to form a flat film and oleic acid droplets Resins with a contact angle of 60 degrees or less may be used as a condition, and there is no particular limitation. When the active ingredient for achieving the above-mentioned contact angle of 60 degrees or less is only a monofunctional monomer, the amount of the monofunctional monomer in the polymerizable component is usually 10% by mass or more, preferably 30% by mass or more, More preferably, it is 50% or more, and most preferably, it is 75% by weight or more. When this ratio is 30% by mass or more, the coating layer 16 is easily fused with the lipid component derived from a living body. When this ratio is reduced to 10% by mass, the coating layer 16 hardly fuses with the living body-derived lipid component.

As for other additives added as needed, there is no problem as long as they are within the range of normal use, but for active energy ray-curable resins, photodecomposition-type or thermal-decomposition-type polymerization initiators are used with respect to 100 parts by mass of polymerizable components Preferably, it is 0.01 mass part - 20 mass parts. In this case, the coating film obtained from the coating agent can be fully or completely cured. If the addition ratio is greater than 20% by mass, although a sufficiently cured coating film can be obtained, the effect will not be improved, and the excess amount is unnecessary and wasteful. The type of polymerization initiator such as photolysis type or thermal decomposition type to be used can be used without any particular limitation.

In the case of adding "each oligomer or each polymer" to the combination of the above-mentioned monofunctional monomer and polyfunctional monomer, in the case of adding "each oligomer or each polymer" In the total amount of "substances", the monofunctional monomer used to achieve the above-mentioned contact angle of 60 degrees or less is usually 10% by mass or more, preferably 30% by mass or more, more preferably 50% by mass or more, most preferably 75% by mass above. When the ratio is 30% by mass or more, the coating layer 16 is sufficiently fused with the lipid component derived from a living body. When this ratio is reduced to 10% by mass, the coating layer hardly fuses with the living body-derived lipid component. The amount of the non-polymerizable oligomer or non-polymerizable polymer added is usually 100 parts by mass or less, preferably 1 to 80 parts by mass, relative to 100 parts by mass of the polymerizable component. When the added amount is 1 to 80 parts by mass, compatibility with a lipid component derived from a living body and characteristic strength of an active energy ray-curable resin coating are excellent.

When a thermoplastic resin is used as a coating agent, as a constituent of the coating agent, there must be a polymer obtained by polymerizing the monofunctional monomer used in the above-mentioned active energy ray-curable resin, which does not contain acrylic In addition to functional group polymers, surfactants, diluent solvents, stabilizers, ultraviolet absorbers, infrared absorbers, or antioxidants may be added as needed.

As the monofunctional monomer, as long as the contact angle between the flat film formed by the resin obtained from the monofunctional monomer and the oleic acid droplet is 60 degrees or less, all known monofunctional monomers can be used. However, As the monofunctional monomer effective in reducing the contact angle with oleic acid droplets, for example, the following monofunctional monomers are preferable. That is, examples of ester compounds with alcohols having 1 to 20 carbon atoms and containing no fluorine atoms include (meth)acrylates, itaconate esters, and fumarate esters. Furthermore, (meth)acrylamide which is an amide compound with an amine having 1 to 10 carbon atoms and does not contain a fluorine atom is mentioned. Furthermore, styrene and substituted styrenes not containing fluorine atoms can be mentioned. In addition, N-vinyl-2-pyrrolidone and substituted N-vinyl-2-pyrrolidone not containing a fluorine atom are mentioned.

Specifically, the following monofunctional monomers can be shown. That is, as the monofunctional monomer, it is preferable to include methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, t- Butyl, isobutyl (meth)acrylate, n-hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isodecyl (meth)acrylate, lauryl (meth)acrylate, ( Stearyl methacrylate, cetyl (meth)acrylate, isobornyl (meth)acrylate ((meth)acryl acid isobonil), cyclohexyl (meth)acrylate, (meth)acrylic acid Tricyclodecanyl, Benzyl (meth)acrylate, Tetrahydrofurfuryl (meth)acrylate, Dicyclopentenyloxyethyl (meth)acrylate, Dicyclopentyl (meth)acrylate, (Meth) Pentamethylpiperidinyl Acrylate, Ethyl (Meth)acrylate Hexahydrophthalate, 2-Hydroxypropyl Ethyl (Meth)acrylate, 2-Hydroxybutyl (Meth)acrylate, Butoxyethyl (meth)acrylate, Phenoxyethyl (meth)acrylate, Methoxydiethylene glycol (meth)acrylate, Methoxytriethylene glycol (meth)acrylate, (Meth)acrylates such as methoxypolyethylene glycol (meth)acrylate, styrene, α-methylstyrene, p-(m)-methoxystyrene, di-tert-butyl fumarate Ester, di-n-butyl fumarate, diethyl fumarate, mono(di)methyl itaconate, mono(di)ethyl itaconate, N-isopropylacrylamide, N-vinyl- 2-pyrrolidone.

It is more preferable to include the following monofunctional monomers, because the following monomers can make the contact angle of the obtained flat film with oleic acid droplets smaller, and the effect of preventing attached fingerprints from being conspicuous is greater. Examples of the monofunctional monomer involved include methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, (meth) tert-butyl acrylate, isobutyl (meth)acrylate, isodecyl (meth)acrylate, stearyl (meth)acrylate, cetyl (meth)acrylate, cyclohexyl (meth)acrylate Tricyclodecanyl (meth)acrylate, Benzyl (meth)acrylate, Tetrahydrofurfuryl (meth)acrylate, Dicyclopentyl (meth)acrylate, Pentamethylpiperidinyl (meth)acrylate , ethyl (meth)acrylate hexahydrophthalate, ethyl (meth)acrylate 2-hydroxypropylphthalate, butoxyethyl (meth)acrylate, phenoxy (meth)acrylate (meth)acrylic esters such as ethyl ethyl ester, methoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth)acrylate, and styrene, N-isopropylpropylene amides.

These preferred monofunctional monomers can be used alone or in combination, and their proportion in the active energy ray-curable resin or thermoplastic resin is preferably 30% by mass or more, more preferably 50% by mass or more, and most preferably 75% by mass. Mass% or more. When the ratio is 30% by mass or more, the coating layer 16 having sufficient compatibility with the lipid component derived from a living body can be obtained.

Examples of the polyfunctional monomer include polyfunctional polymerizable compounds containing two or more (meth)acryloyl groups, such as esterified products of polyols and (meth)acrylic acid and urethane-modified acrylates. Examples of polyhydric alcohols include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, polypropylene glycol, Propanediol (propanediol), butanediol, pentylene glycol, hexanediol, neopentyl glycol, 2-methyl-1,3 hexanediol, 2,2'-thiodiethanol (2,2' Dihydric alcohols such as -thiodiethanol), 1,4-cyclohexanedimethanol, trimethylolpropane, glycerol, pentaerythritol, diglycerin, dipentaerythritol, ditrimethylolpropane, and other trihydric or higher alcohols.

The urethane-modified acrylate can be obtained by subjecting an organic isocyanate having a plurality of isocyanate groups in one molecule and a (meth)acrylic acid derivative having a hydroxyl group to a urethanization reaction. Examples of organic isocyanates containing a plurality of isocyanate groups in one molecule include hexamethylene diisocyanate, isophorone diisocyanate, benzylidene diisocyanate, naphthylene diisocyanate, diphenylmethane diisocyanate, Organic isocyanates having two isocyanate groups in one molecule, such as xylyl diisocyanate and dicyclohexylmethane diisocyanate, are subjected to isocyanurate modification, addition modification, and biuret modification to these organic isocyanates. Organic isocyanates containing three isocyanate groups in one molecule, etc.

Among them, from the viewpoint of improving film strength and availability, hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, (Meth)acrylates such as tripropylene glycol (meth)acrylate, polymethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, hexaethylene Adducts of methyl diisocyanate and 2-hydroxyethyl (meth)acrylate, adducts of isophorone diisocyanate and 2-hydroxyethyl (meth)acrylate, tolylene diisocyanate and (meth) base) adducts of 2-hydroxyethyl acrylate, adducts of addition-modified isophorone diisocyanate and 2-hydroxyethyl (meth)acrylate, and biuret-modified isophorone di Adduct of isocyanate and 2-hydroxyethyl (meth)acrylate.

Examples of oligomers that do not contain a vinyl group or a (meth)acryloyl group include acrylic oligomers, polyester oligomers, epoxy oligomers, urethane oligomers, polyether oligomers, alcohol Various oligomers such as acid oligomers, polybutadiene oligomers, polythiol polyene (polythiol-polyene) oligomers, and spiro acetal oligomers, as well as polyfunctional (methanol) containing polyols base) oligomers of acrylates.

As an oligomer containing a vinyl group or a (meth)acryloyl group, the oligomer which added the vinyl group or (meth)acryloyl group to the said oligomer is mentioned. As a polymer not containing a vinyl group or a (meth)acryloyl group, the polymer type which does not contain the above-mentioned oligomer which does not contain a vinyl group and a (meth)acryloyl group is mentioned. Examples of the polymer containing a vinyl group and a (meth)acryloyl group include the above-mentioned polymer types of oligomers containing a vinyl group and a (meth)acryloyl group.

These oligomers and polymers are preferably selected so that they can perform various functions or can improve adhesion to adjacent layers. For example, in terms of adhesiveness, a resin having an affinity for a resin forming an adjacent layer is preferable. That is, segmented copolymers such as block copolymers and graft copolymers (segmented copolymers) containing the above-mentioned active energy ray-curable Two types of polymers are a polymer having an affinity for a resin or a thermoplastic resin, and a polymer having an affinity for a layer adjacent to an active energy ray-curable resin or a thermoplastic resin.

Examples of the polymerization initiator include known compounds that initiate polymerization by irradiating active energy rays such as ultraviolet rays or light, such as benzophenones, acetophenones, α-amyloximesters Ester), Michaelis (Mihira) benzoyl benzoate, Tetramethilchurum monosulfaid, thioxanthone, etc., specifically, 1-hydroxycyclohexylbenzophenone, 2-hydroxy-2- Methyl-1-phenylpropan-1-one, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino (molferino) propane-1-one, 1-[4 -(2-Hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-1-propan-1-one, benzoin, 2,2-dimethoxy-1,2-diphenylethyl Alkan-1-one, benzophenone, [4-(methylphenylthio)phenyl]phenylphenone, 4-hydroxybenzophenone, 4-phenylbenzophenone, 3,3 ', 4,4'-Tetra(tert-butylperoxycarbonyl)benzophenone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, α-amyloxime ester, Michaelis benzophenone Formic acid esters, Tetramethilchurum Monosalfaid, etc.

The above-mentioned surfactants are used for the purpose of compatibilization when mixing various raw materials and for the purpose of improving the smoothness of the coating. Such a surfactant is not particularly limited, but in order to keep the contact angle between the flat film formed of the resin and the oleic acid droplet at 60 degrees or less, it is preferable to use an acrylic copolymer (ionic, nonionic), formazan, etc. Acrylic-based copolymers, leveling agents for solvent-based coatings (rebering agents), etc.

Commercially available surfactants include "BYK-361", "BYK380", "BYK-390", "BYKetol-WS", "BYK-OK", and "NANOBYK-3601" (manufactured by Bitsukudemi Co., Ltd. )wait. The addition ratio of the surfactant to the coating agent is usually 0.01 to 10 parts by mass, preferably 0.01 to 5 parts by mass, relative to 100 parts by mass of the solid content of the coating agent. If the mixing ratio is 0.01 parts by mass to 10 parts by mass, there will be no excess or deficiency (excess or deficiency) in compatibilization or the smoothness of the coating.

A polysiloxane compound can also be used as a surfactant, but depending on the amount and type of addition, the contact angle of the flat film may be larger than 60 degrees, so the amount of addition needs to be adjusted appropriately.

As the polysiloxane compound, it is preferably a linear or branched polydiorganosiloxane compound, and may also be a copolymer containing a polyorganosiloxane group. A representative example of the polydiorganosiloxane compound is polydimethylsiloxane. Furthermore, a reactive group such as a vinyl group or a (meth)acryloyl group may be present at the terminal of the main chain or side chain. It may also be a structure in which part or all of the methyl group is substituted with other organic groups (where the methyl group is substituted, either at the terminal or in the chain). Examples of other organic groups include alkyl groups other than methyl groups, aryl groups, cycloalkyl groups, chains having repeating units such as polyoxyalkylene chains and polyester chains, and the like. Furthermore, these organic groups may have hydroxyl, amino, epoxy, acyl, acyloxy, carboxyl and other functional groups.

Examples of chains having the above-mentioned repeating units include polyoxyalkylene chains such as polyoxyethylene chains, polyoxypropylene chains, polyoxytetramethylene chains, and poly(oxyethylene oxypropylene) chains, polycaprolactone chains, and polyoxyethylene chains. Polyester chains such as ester chains, polyethylene sebacate chains, and polyethylene adipate chains. These chains may terminate in hydroxyl or carboxyl groups, (meth)acryloyl or vinyl groups, and may be terminated with organic groups. For example, capping with alkyl etherification, alkyl esterification, or the like. This chain is usually bonded to a silicon atom through an alkylene group such as dimethylene or trimethylene, but is not limited thereto.

As the polysiloxane compound, polyether-modified polydimethylsiloxane is preferable, and commercially available products thereof include "BYK-306", "BYK330", "BYK-341", "BYK-344 ", "BYK-307", "BYK-333" (manufactured by Vitsukudemi Corporation), "VXL4930" (manufactured by Viano Valegins), etc.

The diluting solvent is used to adjust the viscosity of the coating liquid when coating a coating agent for forming an active energy ray-curable resin or a thermoplastic resin, and is not particularly limited as long as it is a non-polymerizable diluting solvent. For example, toluene, xylene, ethyl acetate, propyl acetate, butyl acetate, methyl cellosolve, ethyl cellosolve, ethyl cellosolve acetate, methanol, ethanol, isopropanol , butanol, acetone, butanone, methyl isobutyl ketone, cyclohexanone, hexane, heptane, octane, decane, dodecane, propylene glycol monomethyl ether, 3-methoxybutanol, etc.

As the photosensitizer, known compounds used in the above-mentioned polymerization initiators are used, for example: tributylamine, triethylamine, polyethyleneimine, poly-n-butylphosphine (hosofin), p-dimethyl Tertiary amines such as ethyl aminobenzoate and isopentyl p-dimethylaminobenzoate, etc.

In the above-mentioned active energy ray-curable resin or thermoplastic resin, the proportion of fluorine atoms is preferably 0.05% by mass or less, more preferably 0.01% by mass or less, and most preferably contains no fluorine atoms at all. In other words, the active energy ray-curable resin or thermoplastic resin is preferably composed of atoms other than fluorine atoms, or 99.95% by mass or more is composed of atoms other than fluorine atoms; more preferably 99.99% by mass or more is composed of atoms other than fluorine atoms. When the ratio of fluorine atoms is 0.05% or less, on the outermost surface of the surface material 10 for a display, the fluorine atoms as a low surface free energy component are not likely to make lipid components from living organisms form fine droplets, so that fingerprints are less likely to adhere. Obviously, the visibility of display images and the like will not decrease after fingerprints are attached.

In order to make fingerprints formed by lipid components derived from living organisms adhering to the surface more inconspicuous, it is preferable that the resin forming the anti-glare layer contain metal oxides (fine particles). Various types of metal oxides may be mentioned without particular limitation, but silicon oxide, hollow silicon oxide, aluminum oxide, titanium oxide, antimony oxide, zinc oxide, tin oxide, zirconium oxide and the like are preferable. One or more of these metal oxides can be appropriately selected. The form of the metal oxide to be added is not particularly limited, but forms such as powder and sol are preferable.

The average particle size of the metal oxide is not particularly limited, but it is preferably 1 nm to 200 nm, more preferably 1 nm to 150 nm, and most preferably 10 nm to 80 nm in consideration of the dispersibility of the metal oxide and the transparency of the film. By setting the average particle diameter of the metal oxide within a preferable range, the fusion property of the coating film with the lipid component derived from a living body is improved, and the adhered fingerprint becomes less conspicuous. Specifically, if the average particle size is more than 1 nm, the unevenness on the surface of the coating will not become too small, sufficient siphon phenomenon can be obtained, and the fingerprints formed by the lipid components from the organism attached to the surface of the coating will not be easy to be obvious. . When the average particle diameter is 200 nm or less, the dispersibility of the metal oxide and the transparency of the coating will not decrease.

When the above-mentioned metal oxide is contained in the coating agent, in order not to lower the dispersion stability in the coating agent, the adhesiveness with the binder resin, etc., it is preferable to use an organic compound previously dispersed in an organic dispersion medium. It is used in the form of sol. Furthermore, in the composition, in order to improve the dispersion stability of the metal oxide fine particles, the adhesiveness in the binder resin, etc., the surface of the metal oxide fine particles may be modified in advance with various coupling agents. Examples of various coupling agents include organically substituted silicon compounds; metal alkoxides such as aluminum, titanium, zirconium, antimony, or mixtures thereof; salts of organic acids; compounds etc. In order to improve the adhesiveness with the adhesive resin, it is preferable to modify the surface of the metal oxide used with a polymerizable functional group such as an allyl group or an acryloyl group. The ratio of the metal oxide to the polymerizable component is preferably 5% by mass to 95% by mass, more preferably 20% by mass to 80% by mass, and most preferably 35% by mass to 70% by mass. If the ratio is 5% by mass or more, the function of making fingerprints due to the lipid components of living organisms adhering to the surface less conspicuous will not be reduced. If this ratio is 95% by mass or less, sufficient strength which is a feature of the active energy ray-curable resin film can be obtained.

When a thermoplastic resin is used in the coating agent, it is not particularly limited as long as it can form a resin with a contact angle of oleic acid droplets and a flat film of 60 degrees or less. It is generally composed mainly of polymers obtained by polymerizing monofunctional monomers used in the case of the above-mentioned active energy ray-curable resins, polymers containing no acrylic functional groups polymer. In addition, additives such as diluting solvents, stabilizers, ultraviolet absorbers, infrared absorbers, or antioxidants may be added as needed. One kind or two or more kinds of thermoplastic resins can be used, and when two or more kinds are used, the ratio can be set arbitrarily. Other additives added as needed can be used without problems within the ranges usually used.

When a thermosetting resin is used in the coating agent, it is not particularly limited as long as the contact angle between the oleic acid droplet and the flat film is 60 degrees or less. For example, phenolic resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, amino alkyd resin, melamine-urea polycondensation Resin, silicone resin, polysiloxane resin, etc. These thermosetting resins can be used alone or in combination of two or more, and the ratio can be set arbitrarily when two or more are used in combination. Additives such as polymerization initiators, metal oxides, surfactants, diluting solvents, stabilizers, ultraviolet absorbers, infrared absorbers, and antioxidants can be added to the thermosetting resin according to the usual method as needed.

As a method of applying the above-mentioned coating agent for forming the coating layer 16 on the concave-convex layer 14, roll coating, spin coating, dip coating, brush coating, spray coating, bar coating, blade coating, etc. known arbitrary methods such as die coating, gravure coating, curtain coating, reverse coating, kiss coating, and comma coating. When coating, in order to improve interlayer adhesiveness as needed, arbitrary pretreatments such as corona discharge may be performed in advance.

As the active energy ray light source used for curing the active energy ray curable resin, for example, a high pressure mercury lamp, a halogen lamp, a xenon lamp, a nitrogen laser, an electron beam accelerator, a line light source such as a radioactive element, etc. are used. The irradiation amount of the energy ray light source is preferably 50 mJ/cm ² to 5000 mJ/cm ² as the accumulated light amount at the ultraviolet wavelength of 365 nm. If the irradiation amount is 50 mJ/cm ² or more, the coating agent can be sufficiently cured; if it is 5000 mJ/cm ² or less, the active energy ray-curable resin is less likely to be colored.

Next, the concave-convex layer 14 will be described. The concave-convex layer 14 is formed using a transparent resin as a constituent. As the transparent resin, existing resins can be used without particular limitation, and for example, active energy ray-curable resins, thermosetting resins, or thermoplastic resins can be used, and such transparent resins are generally used as coating agents. Among them, active energy ray-curable resins or thermoplastic resins are preferably used from the viewpoint of productivity and storage properties.

A polymerizable component is essential as a component constituting the coating agent of the active energy ray curable resin. As the polymerizable component, one or more kinds selected from monofunctional monomers, polyfunctional monomers, polymerizable oligomers, and polymerizable polymers can be used. In addition, polymerization initiators, non-polymerizable oligomers, non-polymerizable polymers, surfactants, dilution solvents, fine particles 12 for providing unevenness 13, anti-settling agents, optical Sensitizers, stabilizers, ultraviolet absorbers, infrared absorbers or antioxidants, etc.

A known monofunctional monomer can be used as the monofunctional monomer. However, in order to make the anti-glare layer have a good fusion property with the lipid component from the living body with the uneven layer 14 monolayer, it is necessary to apply the above-mentioned covering layer 16 to the uneven layer 14. A well-integrated solution. That is, as the monofunctional monomer for forming the concave-convex layer 14, the monomers described above for the coating layer 16 can be used, and the preferred monomers and compositional ratios are also the same. As the polyfunctional monomer, the monomers described above for the coating layer 16 can be used, and the preferred monomers are also the same. For "each oligomer or each polymer", the "each oligomer or each polymer" described in the above coating layer 16 can be used, and the preferred "each oligomer or each polymer" and its addition ratio Also the same. Furthermore, as the metal oxide, the metal oxides described above for the coating layer 16 can be used, and the preferred metal oxides and their addition ratios are also the same.

As a component of the coating agent constituting the thermoplastic resin, a polymer obtained by polymerizing the monofunctional monomer used for the above active energy ray curable resin or a polymer not containing an acrylic functional group is essential. In addition, surfactants, diluting solvents, microparticles 12 for providing unevenness 13 , anti-settling agents, stabilizers, ultraviolet absorbers, infrared absorbers, or antioxidants may be added as needed.

As the monofunctional monomer, known monofunctional monomers can be used. However, in order for the anti-glare layer to have good compatibility with lipid components derived from living organisms in the uneven layer 14 monolayer, it is necessary to apply the scheme considered in the above-mentioned coating layer 16 to the monofunctional monomer constituting the uneven layer 14 . That is, as the monofunctional monomer for forming the concave-convex layer 14, any known monomer may be used as long as the contact angle between the flat film formed by the resin obtained from the monofunctional monomer and the oleic acid droplet is 60 degrees or less. use. Among them, it is preferable to contain the monofunctional monomer effective in reducing the contact angle with the oleic acid droplet described above in the coating layer 16 , and it is more preferable to contain the more preferable monofunctional monomer. These preferred monofunctional monomers can be used alone or in combination, and their proportion in the active energy ray curable resin or thermoplastic resin is preferably 30% by mass or more, more preferably 50% by mass or more, and most preferably 75% by mass. %above. If the ratio is 30% by mass or more, sufficient compatibility with the lipid component derived from a living body can be obtained. As the polyfunctional monomer, the monomers described above for the coating layer 16 can be used, and the same applies to preferable monomers.

As "each oligomer or each polymer", each of the oligomers and polymers described in 16 in the above coating layer can be used. These oligomers and polymers are preferably selected so as to perform various functions or to improve adhesion with adjacent layers. For example, in terms of adhesiveness, a resin having an affinity for a resin forming an adjacent layer is preferable. That is, a fragmented copolymer such as a block copolymer or a graft copolymer containing a compound having an affinity for the above-mentioned active energy ray-curable resin or thermoplastic resin can be selected. There are two types of polymers, namely, a polymer that is non-toxic, and a polymer that has an affinity with a layer adjacent to the active energy ray-curable resin or the thermoplastic resin.

As the polymerization initiator, the polymerization initiator described in the above-mentioned coating layer 16 can be used, and the addition ratio to the active energy ray-curable resin is also the same as that of the above-mentioned coating layer 16 . As the photosensitizer, the photosensitizers described above for the coating layer 16 can be used. The surfactant is used for the purpose of compatibilization when mixing various raw materials and for the purpose of improving the smoothness of the coating, and the type is not particularly limited, and the surfactants described above for the coating layer 16 can be used. . The diluting solvent is used to adjust the viscosity of the coating liquid when coating a coating agent for forming an active energy ray-curable resin or a thermoplastic resin, and it is not particularly limited as long as it is a non-polymerizable substance, and can be used The dilution solvent described above for the coating layer 16 .

If the anti-glare layer has a good fusion property with the uneven layer 14 single layer and the fingerprint, as in the case of the coating layer 16, the fluorine atom content contained in the uneven layer 14 is preferably 0.05% by mass or less, more preferably 0.05% by mass or less. 0.01% by mass or less, most preferably no fluorine atoms are contained at all.

As a method of coating the coating agent composed of the above-mentioned active energy ray-curable resin or thermoplastic resin on the transparent substrate 11, the coating method described above for the coating layer 16 can be used. When coating, if necessary, In order to improve interlayer adhesiveness, arbitrary pretreatments such as corona discharge may be performed in advance. As the active energy ray light source used for curing the active energy ray-curable resin, the active energy ray light source described above for the coating layer 16 can also be used, and the irradiation amount is also the same.

The method of forming the concave-convex portion 13 on the surface of the concave-convex layer 14 can be performed according to a normal method, and the method is not particularly limited, and examples thereof include a method of adding fine particles 12, and a master of a reversed image of a desired concave-convex shape. Embossing is a method of concave-convex transfer printing, etc. The method by embossing transfer is not particularly limited, and examples thereof include mold type, sheet type, film type, and the like.

First, in the method based on adding microparticles 12, inorganic particles or plastic beads can be mentioned as the microparticles 12. In order to select a desired refractive index when it is necessary to adjust the transparency and the refractive index difference with the transparent resin, Plastic beads are preferred. Examples of the material of such plastic beads include vinyl chloride resin, poly(meth)acrylic resin, acrylic-styrene copolymer, polystyrene resin, melamine resin, polyethylene resin, polycarbonate resin, and the like. The average particle diameter of these microparticles 12 is preferably 0.1 μm to 10 μm, more preferably 0.5 μm to 5 μm. Sufficient anti-glare property can be obtained as this average particle diameter is 0.1 micrometer or more. If the average particle diameter is 10 μm or less, the haze value can be prevented from becoming too high, and the transparency will not be impaired.

The amount of fine particles 12 added to the transparent resin is usually 0.1% to 40% by mass, preferably 0.5% to 30% by mass, more preferably 1% to 20% by mass, and most preferably Preferably it is 1 mass % - 15 mass %. When the added amount is 0.1% by mass or more, sufficient anti-glare properties can be obtained, and sufficient unevenness 13 can be easily formed to exhibit a siphon phenomenon when absorbing a lipid component from a living body. When this addition amount is 40 mass % or less, haze value will not become high too much.

Next, in the method of forming the concave-convex layer 14 by concave-convex transfer, for example, a transparent resin or a composition to which the above-mentioned fine particles 12 are added can be used. Specifically, in the case of an active energy ray-curable resin, a coating agent for the resin is applied, and if necessary, precured by an active energy ray. degree. Then, imprinting is performed using a master, and the master is removed and irradiated with active energy rays, or directly irradiated with active energy rays without removing the master, and cured to form the convex-concave layer 14 . During imprinting, heating may be performed as necessary. In the case of a thermoplastic resin, a coating agent for forming the resin is applied and dried, and then the film is embossed at a temperature equal to or higher than the softening point to transfer unevenness. Examples of the master include, for example, a forming film, a forming roll, and a flat die for forming a press, and a commercially available AG (Anti-Glare: anti-glare) film can be used as the forming film.

The thickness of the concave-convex layer 14 may be equal to or greater than the desired level difference of the concave-convex portion 13, and is usually 0.1 μm to 1000 μm, preferably 0.1 μm to 200 μm, and more preferably 0.1 μm to 100 μm. If the thickness is 0.1 μm to 1000 μm, there will be no excess or deficiency (too much deficiency) when forming the desired uneven portion 13 .

As described above, one or more functional layers may be provided between the above-mentioned transparent substrate 11 and the uneven layer 14 . The functional layer can be formed using an inorganic substance, an organic substance, or a mixture thereof. Its thickness is preferably 0.005 μm to 100 μm. The method for forming the functional layer is not particularly limited, and a dry coating method or a wet coating method can be used. Examples of such functions include improving hardness, improving scratch resistance, improving anti-glare properties, preventing formation of Newton rings (concentric circles of light and shade), improving adhesion, blocking light of a specific wavelength, improving electrical conductivity, and preventing static electricity. , absorbing ultraviolet rays, absorbing infrared rays, improving impact resistance, improving heat insulation, and improving reflectivity. The method of imparting the function is not particularly limited, and conventionally known methods can be used. In particular, it is preferable to form a functional layer for the purpose of improving hardness, adhesion, and scratch resistance.

For example, in order to improve scratch resistance, there are methods of increasing the hardness and softening of the layer between the transparent base material 11 and the uneven layer 14 . The material for forming the functional layer is not particularly limited as long as the effects of the present invention are not impaired, and conventionally known materials can be used. For example, organic substances, inorganic substances and mixtures thereof can be used. In particular, in order to increase hardness (for example, for a hard coat layer), it is preferable to contain a crosslinkable curable monomer. As the curable monomer, a monomer cured in a short time by heating or irradiation with active energy rays such as ultraviolet rays and electron rays is preferable. Examples of curable monomers include silicon compounds such as monofunctional or polyfunctional (meth)acrylates and tetraethoxysilane. Examples of polyfunctional (meth)acrylates include dipentaerythritol hexaacrylate, tetramethylolmethane tetraacrylate (pentaerythritol tetraacrylate), tetramethylolmethane triacrylate (pentaerythritol triacrylate), Trimethylolpropane triacrylate, 1,6-hexanediol diacrylate, 1,6-bis(3-acryloyloxy-2-hydroxypropoxy)hexane and other polyfunctional alcohol derivatives, Polyethylene glycol diacrylate, urethane acrylate, etc. As the inorganic substance, silica gel ultrafine particles and the like can be used.

Furthermore, the adhesive layer 15 provided on the back surface of the surface material 10 for a display is used for adhering the surface material 10 for a display to the surface of a display. As the adhesive for forming the adhesive layer 15, for example, acrylic adhesives, rubber adhesives, silicone adhesives, etc. are mentioned, and from the viewpoint of transparency, acrylic adhesives are preferably used; From the viewpoint of releasability, it is preferable to use a silicone-based adhesive. In addition to the adhesive resin component, these adhesives may contain plasticizers, tackifiers, etc., and it is preferable to determine the compounding amount of these substances to such an extent that the transparency is not impaired. As the adhesive polymer as the main component of the acrylic adhesive, a copolymer of an alkyl (meth)acrylate having an alkyl group having 1 to 10 carbon atoms and a functional group-containing unsaturated monomer is preferable. Examples of the alkyl (meth)acrylate having an alkyl group having 1 to 10 carbon atoms include 2-ethylhexyl acrylate, butyl acrylate, isooctyl acrylate, butyl methacrylate, methyl Propyl acrylate, etc. Acrylic acid, methacrylic acid, maleic acid, fumaric acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, etc. are mentioned as an unsaturated monomer containing a functional group. As the adhesive polymer as the main component of the rubber-based adhesive, styrene-butadiene random copolymer, styrene-isoprene-based block copolymer, natural rubber, and the like are preferable. The thickness of the adhesive layer 15 is preferably 5 μm to 100 μm.

It is effective if the surface material 10 for a display is provided on the outermost (outer) surface of the display main body where the surface may be stained with fingerprints due to hand contact. Specifically, the surface material 10 for a display can be provided, for example, on the surface of a glass case or a plastic case such as a small case or a small window used in a display for display. For example, it can be used for display in personal computers, word processors, televisions, mobile phones, portable terminals, game machines, automatic cash deposit and withdrawal machines, automatic cash withdrawal machines, automatic vending machines, navigation devices, security system terminals, etc. The surface of the touch panel of the image display (CRT, plasma display, liquid crystal display, electroluminescent display, field emission display (field emission), projection display, electronic paper, etc.) has the Display surface material 10.

For example, the touch panel may be integrated with the above-mentioned various displays and may be a separate type arranged on the display surface of various displays. As the form of the touch panel, any known form can be used, and it is not particularly limited. Specifically, methods such as an ultrasonic method, a resistive film method, an electrostatic capacitance method, an electrical deformation method, a magnetic gas deformation method, an infrared ray method, and an electromagnetic induction method are exemplified. From the viewpoint of power consumption and manufacturing cost, a resistive touch panel is preferable, and from the viewpoint of resolution, an electromagnetic induction touch panel is preferable.

FIG. 3( a ) is a cross-sectional view showing a resistive touch panel 20 . As shown in the figure, its structure is as follows: base materials 23, 24 on the fixed side (lower side in the figure) and movable side (upper side in the figure) are formed of transparent resin sheets, and the base materials 23, 24 are respectively on one side. The transparent conductive films 21, 22 are provided, the substrates 23, 24 are arranged so that the transparent conductive films 21, 22 face each other, and the surroundings are adhered with an adhesive reinforcing material 25 so that the substrates 23, 24 are kept at a constant interval. . A plurality of insulating spacers 26 are arranged in dots on one side of the transparent conductive film 21 , so that the transparent conductive films 21 and 22 facing each other form an insulating structure. The main body of the touch panel is constituted by the base materials 23, 24, the transparent conductive films 21, 22, the insulating spacer 26, and the like. The above-mentioned surface material for a display is provided on the base material 24 on the movable side. Or the touch panel 20 as shown in Figure 3 (b) is configured as follows: on the surface of the base material 24 on the movable side, the transparent base material 11 is adhered by the adhesive layer 15, and the surface is provided with a concave-convex layer 14 formed thereon. Display surface material 10. Then, by pressing the surface material 10 for a display with a finger 27, the transparent conductive film 22 on the movable side is brought into contact with the transparent conductive film 21 on the fixed side, thereby enabling electrical conduction and input.

The electromagnetic induction touch panel 20 is configured as shown in the sectional view of FIG. 4 . That is, the surface material 10 for a display is laminated and bonded on the surface of the base material 24 made of transparent resin, and a pen position detector 28 is provided on the back surface of the base material 24. LCD) is covered with receiving circuits. The surface material 10 for a display is constituted by providing a concave-convex layer 14 on the surface of a transparent substrate 11 made of a transparent resin sheet, and providing an adhesive layer 15 on the back surface. Furthermore, an electromagnetic input pen 29 incorporating an unillustrated transmission coil is provided. Then, when the surface material 10 for a display is pressed with the input pen 29, electromagnetic induction is generated, and the generated electromagnetic wave is detected by the pen position detector 28, and the input position is recorded.

To describe the operation of this embodiment, the surface material 10 for a display is composed of a transparent substrate 11 and an uneven layer 14 thereon having an uneven portion 13 on the surface made of resin. When this display surface material 10 is placed on the surface of a resistive touch panel 20 of a display and used, the touch panel 20 is operated by pressing the surface of the display surface material 10 with a finger 27 . At this time, lipid components derived from living organisms that form fingerprints adhere to the surface of the surface material 10 for a display, and image visibility of the touch panel 20 deteriorates. When the touch panel 20 is an electromagnetic induction method, the input pen 29 is used to operate instead of the finger 27. However, when the input pen 29 is operated, the palm of the hand touches the surface of the display, which will cause fat from the living body to touch the surface of the display. Lipid components attached thereto, or sometimes even without manipulation, fingertips touch the surface of the display, and lipid components from living organisms adhere thereto. In this case, likewise, the visibility of the image on touch panel 20 is reduced.

However, since the concave-convex layer 14 has the concave-convex portion 13 on the surface formed of resin, the reflection direction of the light incident on the surface is changed and scattered by the concave-convex portion 13, which suppresses the reflected light entering the eyes and reduces the glare. And, by the siphon phenomenon that appears on the uneven part 13 on the surface, the lipid component derived from the living body that forms the fingerprint is drawn to the concave part 13a on the surface. Moreover, the contact angle between the flat film formed by the resin constituting the concave-convex layer 14 and the oleic acid droplet is set to be 60 degrees or less, so the resin is easily fused with the lipid component from the living body, and the lipid from the living body The components are quickly drawn to the concave portion 13 a on the surface, and fingerprints are rendered invisible, thereby improving the image visibility of the touch panel 20 .

According to the preferred embodiment, the following effects can be obtained.

In the surface material 10 for a display, since the concave-convex layer 14 has the concave-convex part 13 on the surface formed of resin, reflected light is scattered, and anti-glare property is exhibited. Furthermore, by having the concavo-convex portion 13 on the surface, the living body-derived lipid component forming the fingerprint is drawn to the concave portion 13a on the surface by the siphon phenomenon. In addition, since the contact angle between the flat film formed by the resin constituting the surface and the oleic acid droplet is set to be 60 degrees or less, the resin constituting the concave-convex layer 14 is easily fused with the lipid component derived from the organism, and the lipid derived from the organism Grain components are quickly drawn to the concave portion 13a of the surface, and the attached fingerprints become difficult to recognize. Therefore, the surface material 10 for a display has both the antiglare function and the function of making the fingerprint adhering to the surface difficult to see, and can improve the visibility of the image etc. of a display.

In addition, it is speculated that since the resin contains metal oxides with an average particle diameter of 1 nm to 200 nm, the unevenness 13 on the surface of the anti-glare layer becomes a nanoscale fine part, which promotes the siphon phenomenon, and the lipid components from the organism are quickly absorbed. Fingerprints adhering to the recesses on the surface of the anti-glare layer become difficult to see.

The above-mentioned resin does not contain fluorine atoms, or when the fluorine atoms are contained, the content of the fluorine atoms is 0.05% by mass or less, so that the lipid components derived from the living body caused by the fluorine atoms are made into fine droplets. is suppressed, and diffuse reflection of light can be suppressed.

For the concave-convex portion 13 on the surface of the concave-convex layer 14, the arithmetic mean roughness (Ra) specified in JIS B 0601-1994 is 0.05 μm to 5 μm, and the average interval (Sm) of the concave-convex portion 13 is 5 μm to 500 μm, so that it can be more effective The siphon phenomenon due to the concavo-convex portion 13 is clearly shown. In such a surface state of the concavo-convex portion 13 , the haze value is small, and the fingerprints adhering to the surface are in relatively obvious areas, so the effect of preventing fingerprints from being conspicuous can be effectively achieved.

Such a surface material 10 for a display is arranged on the surface of a display to constitute a display, so that the surface material 10 for a display can exhibit the above-mentioned effects, and the function of the display can be fully exhibited.

Example

Next, examples of the present invention will be described. First, methods for measuring fingerprint visibility, surface roughness, contact angle, and haze value will be described.

1) Fingerprint visibility

Fingerprints were attached to the surface material 10 for a display, and the visibility was sensory-evaluated on the following four levels by visual observation.

4: No fingerprints can be seen at all; 3: Fingerprints can be seen slightly; 2: Fingerprints are relatively thin, but can be seen clearly; 1: Fingerprints can be seen clearly.

2) Surface roughness

Using the surface roughness measuring machine Surfkoda SE4000 manufactured by Kosaka Research Institute, under the conditions of scanning range 1.5mm and scanning speed 0.1mm/s, according to the regulations in JIS B 0601-1994, Ra and Sm.

3) Contact angle

The contact angle was measured with a drop of 4 μl using Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd.

4) Haze value

The haze value (%) which is an optical characteristic was measured using the direct-reading haze meter [manufactured by Toyo Seiki Seisakusho Co., Ltd., trade name: direct-reading haze meter (No. 206)].

5) Visual evaluation of monitor images

The surface material 10 for a display was mounted on a display, and the visibility of a display image was sensory-evaluated by the following 4 grades by visual observation.

4: Clear and good visibility was obtained; 3: Visibility was slightly lacking in sharpness; 2: Visibility was somewhat lacking; 1: Image was difficult to see.

(Manufacturing example 1)

In a flask, 500 parts of colloidal silica [manufactured by Nissan Chemical Industry Co., Ltd., trade name: IPA-SR-L, 30% solution of 2-propanol, average particle diameter of 40 nm to 50 nm], 30 parts of γ-propylene Acyloxypropyltrimethoxysilane [manufactured by Shin-Etsu Chemical Co., Ltd., trade name: KBM5103] and 40 parts of distilled water were mixed to obtain a coating liquid for modified colloidal silica. Thereafter, heating and reflux (reaction temperature: 80° C.) were performed for 4 hours to perform hydrolysis and condensation reactions. Through this operation, modified colloidal silica (30% solution of 2-propanol, average particle diameter: 55 nm) was obtained.

(Manufacturing example 2)

Colloidal silica manufactured by Nissan Chemical Industry Co., Ltd. under the trade name XBA-ST (30% solution of a mixture of xylene and n-butanol, with an average particle diameter of 10 nm to 15 nm) was used. 1 was reacted to obtain modified colloidal silica (a 30% solution of a mixture of xylene and n-butanol, with an average particle diameter of 20 nm).

(Example 1)

Pentaerythritol triacrylate 50 parts by mass

Dicyclopentyl acrylate 50 parts by mass

Silica filler (average particle size is 1 μm) 8 parts by mass

1-hydroxycyclohexyl benzophenone 2 parts by mass

Butanone 150 parts by mass

The above-mentioned raw materials are mixed to produce a concavo-convex layer 14 (the contact angle between the flat film formed by the resin layer constituting this layer and the oleic acid droplet is 60 degrees or less) for forming a single layer having good fusion properties with fingerprints. Coating agent. The above-mentioned coating agent was coated on a PET film having a thickness of 100 μm as the transparent substrate 11 by a roll coater so that the dry film thickness would be 3 μm, and dried at 70° C. for 60 seconds. Then, it was cured by irradiating ultraviolet rays (cumulative light intensity: 400 mJ/cm ² ) with a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) to form a single-layer concave-convex layer 14 with good compatibility with fingerprints. Ra of the uneven layer 14 was 0.33 μm, Sm was 150 μm, and the haze value of the film was 10%. The contact angle with triacetin is 33 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Then, a coating agent obtained by removing the silicon oxide filler from the above coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 30 degrees.

(Example 2)

Pentaerythritol triacrylate 30 parts by mass

Phenoxyethyl acrylate 35 parts by mass

Polymethyl methacrylate 35 parts by mass

Silica filler (average particle size is 1 μm) 7 parts by mass

1-hydroxycyclohexyl benzophenone 2 parts by mass

Butanone 150 parts by mass

The above-mentioned raw materials are mixed to produce a single-layer uneven layer 14 having good compatibility with fingerprints (the contact angle between a flat film formed of a resin layer constituting this layer and an oleic acid droplet is 60 degrees or less). Coating agent. The above-mentioned coating agent was coated on a PET film with a thickness of 100 μm by a roll coater to a dry film thickness of 3 μm, and dried at 70° C. for 60 seconds. Then, it was cured by irradiating ultraviolet rays (cumulative light intensity: 400 mJ/cm ² ) with a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) to form a single layer of concavo-convex layer 14 with good compatibility with fingerprints. Ra of the uneven layer 14 was 0.30 μm, Sm was 130 μm, and the haze value of the film was 8%. The contact angle with triacetin is 30 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Then, a coating agent obtained by removing the silicon oxide filler from the above coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 25 degrees.

(Example 3)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. purple light UV-7600B) 60 parts by mass

Trimethylolpropane triacrylate 10 parts by mass

Polymethyl methacrylate 30 parts by mass

Silica filler (average particle size 1 μm) 8 parts by mass

1-hydroxycyclohexyl benzophenone 3 parts by mass

Methyl isobutyl ketone 150 parts by mass

The above-mentioned raw materials are mixed to produce a single layer for forming a concave-convex layer 14 with good compatibility with fingerprints (the contact angle between a flat film formed of a resin layer constituting this layer and an oleic acid droplet is 60 degrees or less). Coating agent. The above-mentioned coating agent was coated on a PET film with a thickness of 100 μm by a roll coater to a dry film thickness of 3 μm, and dried at 80° C. for 60 seconds. Then, it was cured by irradiating ultraviolet rays (cumulative light intensity: 200 mJ/cm ² ) with a 120W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) to form a single-layer concave-convex layer 14 with good compatibility with fingerprints. Ra of the uneven layer 14 was 0.30 μm, Sm was 130 μm, and the haze value of the film was 8%. The contact angle with glycerol triacetate is 17 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Then, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 14 degrees.

(Example 4)

As the metal oxide particles, instead of using a silicon oxide filler, crosslinked PMMA fine particles (manufactured by Soken Chemical Co., Ltd., MX-300, with an average particle diameter of 3 μm) were used, and the same method as in Example 3 was used. In this way, the surface material 10 for a display is produced. Ra of the uneven layer 14 was 0.35 μm, Sm was 150 μm, and the haze value of the film was 6%. The contact angle with glycerol triacetate is 17 degrees.

The fingerprint visibility evaluation of this display surface material 10 was 3. The visual evaluation of the display image was 3.

Next, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 12 degrees.

(Example 5)

A surface material 10 for a display was produced in the same manner as in Example 3 except that the TAC film was used instead of the PET film as the base material. Ra of the uneven layer 14 was 0.33 μm, Sm was 140 μm, and the haze value of the film was 7%. The contact angle with glycerol triacetate is 18 degrees.

The fingerprint visibility evaluation of this display surface material 10 was 3. The visual evaluation of the display image was 3.

Next, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 13 degrees.

(Example 6)

Polymethyl methacrylate 100 parts by mass

Silica filler (average particle size is 1 μm) 7 parts by mass

Butanone 150 parts by mass

The above-mentioned raw materials are mixed to produce a single layer for forming a concave-convex layer 14 with good compatibility with fingerprints (the contact angle between a flat film formed of a resin layer constituting this layer and an oleic acid droplet is 60 degrees or less). coating agent. The coating agent was coated on a PET film having a thickness of 100 μm by a roll coater so that the dry film thickness would be 3 μm, and dried at 70° C. for 60 seconds. Then, it was further dried at 80° C. for 30 minutes to form the concavo-convex layer 14 having good compatibility with fingerprints as a single layer. Ra of the uneven layer 14 was 0.31 μm, Sm was 120 μm, and the haze value of this film was 8%. The contact angle with glycerol triacetate is 18 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 3.

Then, the coating agent obtained by removing the silicon oxide filler from the above-mentioned coating agent was applied to a PET film, and dried to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 15 degrees.

(Example 7)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. purple light UV-7600B) 0.50 parts by mass

Dicyclopentyl acrylate 0.50 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the covering layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Dainippon Printing Co., Ltd.) by a dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) was used to irradiate ultraviolet light (cumulative light intensity: 400mJ/cm ² ) under a nitrogen stream to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.33 μm, Sm was 210 μm, and the haze value of the film was 10%. The contact angle with triacetin is 31 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Next, a coating agent derived from the above-mentioned coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 29 degrees.

(Embodiment 8)

Pentaerythritol triacrylate 1.50 parts by mass

Phenoxyethyl acrylate 1.75 parts by mass

Polymethyl methacrylate 1.75 parts by mass

1-Hydroxycyclohexylbenzophenone 0.10 parts by mass

Butanone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the covering layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Sunwasuply Co., Ltd., liquid crystal protective film LCD-190) by the dip coating method, and dried at 70° C. for 60 seconds. Then, utilize a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) to irradiate ultraviolet light (accumulative light intensity is 400mJ/cm ² ) to form an anti-glare layer. Coating layer 16 with good fusion property. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of the film was 10%. The contact angle with triacetin is 30 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Next, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 26 degrees.

(Example 9)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. Ziguang UV-7600B) 0.60 parts by mass

Trimethylolpropane triacrylate 0.10 parts by mass

Polymethyl methacrylate 0.30 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the covering layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Dainippon Printing Co., Ltd.) by a dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) was used to irradiate ultraviolet rays (cumulative light intensity: 200mJ/cm ² ) under a nitrogen stream to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.33 μm, Sm was 170 μm, and the haze value of the film was 10%. The contact angle with glycerol triacetate is 17 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 3.

Then, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 15 degrees.

(Example 10)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. purple light UV-7600B) 0.60 parts by mass

Trimethylolpropane triacrylate 0.10 parts by mass

Polymethyl methacrylate 0.30 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Surface conditioner (byk-361 manufactured by ビツクケミイイイスイスタスイスタスイスススタススタスス) 0.02 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the coating layer 16 fused with fingerprints. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Dainippon Printing Co., Ltd.) by a dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) was used to irradiate ultraviolet rays (cumulative light intensity: 200mJ/cm ² ) under a nitrogen stream to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.30 μm, Sm was 175 μm, and the haze value of the film was 10%. The contact angle with glycerol triacetate is 20 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 3.

Then, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 18 degrees.

(Example 11)

Polystyrene 5 parts by mass

Toluene 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the coating layer 16 . On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Sunwasuply Co., Ltd., liquid crystal protective film LCD-190) by the dip coating method, and dried at 70° C. for 60 seconds. Then, it was further dried at 80° C. for 30 minutes to form an anti-glare layer including a concave-convex layer 14 and a coating layer 16 provided on the concave-convex layer 14 which is well compatible with fingerprints. Ra of the antiglare layer was 0.32 μm, Sm was 230 μm, and the haze value of the film was 10%. The contact angle with triacetin is 35 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 3.

Next, the above-mentioned coating agent was applied on the PET film, and dried to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 15 degrees.

(Example 12)

Pentaerythritol triacrylate 30 parts by mass

Cyclohexyl acrylate 35 parts by mass

Polymethyl methacrylate 35 parts by mass

1-hydroxycyclohexyl benzophenone 2 parts by mass

Butanone 150 parts by mass

The above-mentioned raw materials are mixed to produce a single-layer concave-convex layer 14 having good fusion properties with fingerprints (the contact angle between the flat film formed by the resin layer constituting this layer and the oleic acid droplet is 60 degrees or less). Coating agent. The coating agent was coated on a PET film having a thickness of 100 μm by a roll coater so that the dry film thickness would be 20 μm, and dried at 70° C. for 60 seconds. Then, after bonding it to a commercially available AG film (manufactured by Sunwasapurai Co., Ltd., liquid crystal protective film LCD-190) in such a manner that the coated surface and the AG surface are in contact, a 120W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) ) was irradiated with ultraviolet rays (cumulative light intensity: 400mJ/cm ² ) and cured, and then peeled off a commercially available AG film (manufactured by Sunwasapurai Co., Ltd., liquid crystal protective film LCD-190) to form a single layer with good compatibility with fingerprints. Concave-convex layer 14. Ra of the uneven layer 14 was 0.37 μm, Sm was 300 μm, and the haze value of the film was 12%. The contact angle with triacetin is 31 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 3. The visual evaluation of the display image was 3.

Then, a coating agent derived from the above-mentioned coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 25 degrees.

(Example 13)

Poly tert-butyl methacrylate 5 parts by mass

Butanone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the coating layer 16 . On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Sunwasuply Co., Ltd., liquid crystal protective film LCD-190) by the dip coating method, and dried at 70° C. for 60 seconds. Then, it was further dried at 80° C. for 30 minutes to form an anti-glare layer including a concave-convex layer 14 and a coating layer 16 provided on the concave-convex layer 14 with good compatibility with lipid components from living organisms. Ra of the antiglare layer was 0.32 μm, Sm was 230 μm, and the haze value of the film was 10%. The contact angle with triacetin is 40 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 2. The visual evaluation of the display image was 3.

Then, the above-mentioned coating agent was applied on the PET film and dried to prepare a flat film having no irregularities 13 on the surface. The contact angle of the obtained flat film with an oleic acid droplet was 37 degrees.

(Example 14)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. Ziguang UV-7600B) 0.25 parts by mass

Dicyclopentyl acrylate 0.25 parts by mass

Modified colloidal silica of Production Example 1

(average particle size is 55nm, 30% solution of 2-propanol) 1.70 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the covering layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Dainippon Printing Co., Ltd.) by a dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) was used to irradiate ultraviolet light (cumulative light intensity: 400mJ/cm ² ) under nitrogen flow to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of the film was 10%. The contact angle with triacetin is 11 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 4. Compared with Example 7 which does not contain this modified colloidal silica having an average particle diameter of 55 nm, these visual evaluations are greatly improved.

Then, a coating agent derived from the above-mentioned coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with the oleic acid droplet was 11 degrees, which was significantly lower than that of Example 7. That is, the compatibility with fingerprints generated from lipid components derived from living organisms can be remarkably improved.

(Example 15)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. purple light UV-7600B) 0.30 parts by mass

Trimethylolpropane triacrylate 0.05 parts by mass

Polymethyl methacrylate 0.15 parts by mass

Modified colloidal silica of Production Example 1

(average particle size is 55nm, 30% solution of 2-propanol) 1.70 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the coating layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Dainippon Printing Co., Ltd.) by a dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) was used to irradiate ultraviolet light (cumulative light intensity: 400mJ/cm ² ) under nitrogen flow to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of the film was 10%. The contact angle with triacetin is 12 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 4, which was improved compared to Example 9 which did not contain the modified colloidal silica having an average particle diameter of 55 nm.

Then, a coating agent derived from the above-mentioned coating agent was applied to a PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle between the obtained flat film and the oleic acid droplet was 14 degrees, which was slightly better than Example 9.

(Example 16)

Hexafunctional urethane acrylate

(Nippon Synthetic Chemical Industry Co., Ltd. purple light UV-7600B) 0.15 parts by mass

Phenoxyethyl acrylate 0.175 parts by mass

Polymethyl methacrylate 0.175 parts by mass

Modified colloidal silica of Production Example 1

(average particle size is 55nm, 30% solution of 2-propanol) 1.70 parts by mass

1-Hydroxycyclohexylbenzophenone 0.03 parts by mass

Methyl isobutyl ketone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the covering layer 16 fused with the fingerprint. On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Sunwasuply Co., Ltd., liquid crystal protective film LCD-190) by the dip coating method, and dried at 70° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) was used to irradiate ultraviolet light (cumulative light intensity: 200mJ/cm ² ) under a nitrogen stream to form an anti-glare layer. The covering layer 16 with good fusion property with fingerprints on it. Ra of the antiglare layer was 0.32 μm, Sm was 210 μm, and the haze value of the film was 9%. The contact angle with triacetin is 11 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 4. The visual evaluation of the display image was 4. Compared with Example 8 which does not contain the modified colloidal silica having an average particle diameter of 55 nm, these visual evaluations are significantly improved.

Then, the above-mentioned coating agent was coated on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle between the obtained flat film and the oleic acid droplet was 14 degrees, which was significantly improved compared with Example 8.

(Example 17)

As the particles of modified colloidal silica, the modified colloidal silica (average particle diameter: 20 nm, 30% solution of mixed solution of xylene and n-butanol) of Production Example 2 was used, and the same method as in Example 15. In the same manner, the surface material 10 for a display is produced. Ra of the uneven layer 14 was 0.32 μm, Sm was 220 μm, and the haze value of this film was 9%. The contact angle with triacetin is 12 degrees.

The fingerprint visibility evaluation of this display surface material 10 was 4. The visual evaluation of the display image was 4. Compared with Example 8 which does not contain the modified colloidal silica having an average particle diameter of 55 nm, these visual evaluations are greatly improved.

Then, the above-mentioned coating agent was applied on the PET film, dried, and then irradiated with ultraviolet rays to prepare a flat film without the concave-convex portion 13 . The contact angle between the obtained flat film and the oleic acid droplet was 13 degrees, which was significantly improved compared with Example 8. In this Example 17, compared with Example 16, almost no difference was seen in the contact angle and visual evaluation.

(comparative example 1)

Polymethyl methacrylate 5 parts by mass

Polymethylmethacrylate-b-polyacrylic acid (perfluorooctyl ethyl ester)

That is, block copolymer 0.05 parts by mass

Butanone 100 parts by mass

The above-mentioned raw materials are mixed to prepare a coating agent for forming the coating layer 16 . On the other hand, the above-mentioned coating agent was coated on a commercially available AG film (manufactured by Sunwasuply Co., Ltd., liquid crystal protective film LCD-190) by the dip coating method, dried at 70° C. for 60 seconds, and further dried at 80° C. Let dry for 30 minutes. Ra of the obtained antiglare layer was 0.33 μm, Sm was 230 μm, and the haze value of the film was 11%. The contact angle with triacetin is 73 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using a silicone-based adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 1. The visual evaluation of the display image was 3.

Then, the above-mentioned coating agent was applied on the PET film, and dried to prepare a flat film without the concave-convex portion 13 . The contact angle of the obtained flat film with an oleic acid droplet was 71 degrees.

(comparative example 2)

Pentaerythritol triacrylate 50 parts by mass

Dicyclopentyl acrylate 50 parts by mass

1-Hydroxycyclohexylbenzophenone 2 parts by mass

Butanone 150 parts by mass

The above raw materials were mixed, coated on a PET film with a thickness of 100 μm by dip coating, and dried at 70° C. for 60 seconds. Then, it was cured by irradiating ultraviolet rays (cumulative light intensity: 400 mJ/cm ² ) with a 120W high-pressure mercury lamp (manufactured by Nippon Battery Co., Ltd.) to form a flat film with good compatibility with fingerprints but no unevenness 13 . Ra of the flat film was 0.01 μm, Sm was 12 μm, and the haze value of the film was 0.3%. The contact angle with triacetin is 45 degrees.

Next, an adhesive layer 15 was formed on the surface of the PET film opposite to the concave-convex portion 13 using an acrylic adhesive, whereby the surface material 10 for a display was produced. This is bonded to the front surface of the touch panel main body to manufacture the touch panel 20 . The fingerprint visibility evaluation of this touch panel 20 was 1. The visual evaluation of the display image was 4. The contact angle of the obtained film with an oleic acid droplet was 30 degrees.

This embodiment can be implemented with the following changes.

In the measurement of the contact angle, elaigin or the like may be used instead of oleic acid droplets.

It may also be configured to improve the visibility of the display surface to lipid components derived from living organisms other than fingerprints.

The adhesive layer 15 is not provided on the back surface of the surface material 10 for a display, but the surface material 10 for a display is attached to the surface of a display using an adhesive agent etc. in a structure.

On the surface of the anti-glare layer, the concave-convex portion 13 can be represented by the maximum height (Ry), ten-point average roughness (Rz), etc. specified in JIS B 0601-1994.

With regard to the surface material 10 for the above-mentioned display, by increasing the chroma C ^* specified by the following formula from the chroma a ^* and b ^* specified in JIS Z 8729 in the configuration, the surface material can be made compatible with The same color system as the lipid components of the body can further improve visibility.

C ^* ＝((a ^* ) ²⁺ (b ^* ) ² ) ^1/2

In the composition, the particle size distribution of the metal oxide particles can be made as narrow (sharp) as possible, the dispersibility of the metal oxide particles in the resin can be improved, and the siphon phenomenon can be fully exerted.

Claims (10)

1. display surfacing, it has transparent base (11) and is arranged on antiglare layer (14 on the above-mentioned transparent base (11); 14,16), this display surfacing is to be configured in the display surfacing (10) that uses on the surface of display, it is characterized in that,

Above-mentioned antiglare layer has resinous jog (13) on the surface,

The planar film that is formed by above-mentioned resin and the contact angle of oleic acid drop are below 60 degree.

2. display surfacing according to claim 1 is characterized in that, above-mentioned resin contains the metal oxide that mean grain size is 1nm～200nm.

3. display surfacing according to claim 1 is characterized in that, above-mentioned resin does not contain fluorine atom or fluorine atom content below 0.05 quality %.

4. display surfacing according to claim 1 is characterized in that, above-mentioned jog is 0.05 μ m～5 μ m according to the arithmetic average roughness Ra of JIS B 0601-1994 defined, and the equispaced Sm of above-mentioned jog is 5 μ m～500 μ m.

5. according to any described display surfacing of claim 1 to 4; it is characterized in that; above-mentioned antiglare layer comprises buckle layer (14); this buckle layer (14) has the above-mentioned jog that utilizes particle or concavo-convex transfer printing to form, and above-mentioned buckle layer has affinity to the lipid components from biosome that forms fingerprint.

6. according to any described display surfacing of claim 1 to 4; it is characterized in that; above-mentioned antiglare layer comprises buckle layer (14) and is formed at coating (16) on this buckle layer; this buckle layer (14) has the above-mentioned jog that utilizes particle or concavo-convex transfer printing to form, and above-mentioned coating has affinity to the lipid components from biosome that forms fingerprint.

7. according to any described display surfacing of claim 1 to 4, it is characterized in that, this surfacing further possesses functional layer, and this functional layer is arranged between above-mentioned transparent base and the above-mentioned antiglare layer, is used to realize the function of display with surfacing.

8. according to any described display surfacing of claim 1 to 4, it is characterized in that this surfacing further has adhering agent layer, this adhering agent layer is arranged at the back side of above-mentioned transparent base.

9. display surfacing according to claim 2 is characterized in that above-mentioned metal oxide is a monox.

10. a display is characterized in that, at its surface configuration requirement 1 to 4 any described display surfacing of having the right.

Images