JP2008096781A - Surface material for high definition display and high definition display and high definition touch panel having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface material for a high definition display, the material having an antidazzle function and a function of rendering a fingerprint remaining on the surface into hardly visible and capable of improving visibility of a display, and to provide a high definition display and a high definition touch panel having the surface material. <P>SOLUTION: The surface material for a high definition display is used by disposing on the surface of a display such as a touch panel and a liquid crystal panel. The surface material for a display comprises a transparent substrate and a single antidazzle layer thereon or an antidazzle layer over a functional layer on the substrate. The antidazzle layer is designed to have an average spacing of projections and recesses on its surface of 20 to 300 μm and the surface energy of 30 to 70 mN/m, and the haze value of the surface material for a display is set to 3 to 50%. The antidazzle layer comprises fine particles dispersed in a binder resin, wherein the average particle diameter of the fine particles is 0.1 to 10 μm and the content of the particles is 0.5 to 30 mass% with respect to the binder resin. The functional layer is preferably a light diffusing layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a display surface material provided on the surface of an image display such as a personal computer, a television, or a mobile phone, a touch panel display such as a car navigation system or an ATM, a display for display such as a glass case or a plastic case, and the like. The present invention relates to a high-definition display and a high-definition touch panel.

  In this type of display, if external light is reflected without diffusing on its surface (display surface), the image will move into it, making the internal image very difficult to see. An anti-glare film is provided for diffusing light from.

However, since the finger touches the surface when the display is used, fingerprints or the like (hereinafter also simply referred to as “fingerprints”) due to a lipid component such as sebum adhere to the surface, and the visibility of the image tends to be impaired. . Therefore, a countermeasure for preventing the fingerprint from adhering to the surface of the display has been proposed. For example, an antiglare film is disclosed in which a resin layer is laminated on a transparent substrate film and an antiglare layer having antifouling properties is formed thereon (see, for example, Patent Document 1). This anti-glare layer having antifouling properties contains a fluorine-modified compound, and the contact angle with respect to triacetin exceeds 43 °.
JP 2000-194272 A (pages 2 and 4)

  Since the antifouling layer formed of the fluorine-modified compound has low surface free energy, it has an advantage that the amount of fingerprints attached is reduced and the attached fingerprints can be easily wiped off. However, since the antiglare layer contains a fluorine-modified compound and the contact angle with respect to triacetin exceeds 43 °, the fingerprint derived from the biological lipid component that forms the fingerprint attached on the antiglare layer is visible. It is easy to form micro droplets that cause the phenomenon. For this reason, irregular reflection of light occurs in the formed fine droplets, and the point that the fingerprint is conspicuous on the display surface has not been improved. Therefore, there is a problem that the visibility of the display image on the display is lowered.

  Accordingly, an object of the present invention is to provide a surface material for high-definition displays that has both an anti-glare function and a function that makes fingerprints attached to the surface less noticeable, and can improve the visibility of the display, and the same. The object is to provide a high-definition display and a high-definition touch panel.

  The fingerprint attached to the surface of the display is recognized by the eyes when the biological lipid component forms microdroplets on the surface and light is irregularly reflected by the microdroplets. Therefore, the idea was changed so that the fingerprint can hardly be noticed visually when the microdroplet is not generated even when the biological lipid component adheres, that is, when the display surface gets wet. In other words, based on the surface irregularities to develop anti-glare properties, the amount of adherence of biological lipid components is reduced, and in addition to the surface irregularities, the substances constituting the surface are easily adapted to the biological lipid components. If the living body-derived lipid component is further absorbed by capillary action, the attached fingerprint can be effectively prevented from being noticeable. Furthermore, by controlling the haze value, an effect of making the fingerprint familiar with the surface less noticeable can be exhibited. As a result, the present invention has been completed.

  That is, the surface material for high-definition display according to the first aspect of the present invention is a surface material for display used by being disposed on the surface of the display. That is, the antiglare layer is provided on the transparent substrate alone or via the functional layer, and the average interval of the irregularities on the surface of the antiglare layer is 20 to 300 μm, and the surface energy is 30. The haze value of the surface material for display is 3 to 50%.

  In the first invention, the antiglare layer is formed by dispersing fine particles in a binder resin, and the average particle size of the fine particles is 0.1 to 10 μm. In addition, the content of the fine particles is 0.5 to 30% by mass with respect to the binder resin.

A surface material for a high-definition display according to a third invention is characterized in that, in the first or second invention, the functional layer is a light diffusion layer.
A high-definition display according to a fourth aspect is characterized in that the surface material for a high-definition display according to any one of the first to third aspects is arranged on the outermost surface of the display.

  A high-definition touch panel according to a fifth invention is characterized in that the surface material for a high-definition display according to any one of the first to third inventions is arranged on the outermost surface of the touch panel.

According to the present invention, the following effects can be exhibited.
In the surface material for a high-definition display according to the first aspect of the invention, by setting the average interval of the irregularities on the surface of the anti-glare layer to 20 to 300 μm, a good anti-glare property can be exhibited by light diffusion and installed on the high-definition display. Even if it does not produce glare etc., visibility can be improved. Furthermore, by making the surface energy of the antiglare layer 30 to 70 mN / m, the familiarity with the attached fingerprint component can be improved. In addition, by setting the haze value of the display surface material to 3 to 50%, fingerprints familiar on the surface can be made inconspicuous. Therefore, it has both an anti-glare function and a function that makes the fingerprint attached to the surface less noticeable, and can improve the visibility of the display.

  In the surface material for a high-definition display of the second invention, the average particle diameter of the fine particles forming the antiglare layer is set in a small range, and the content of the fine particles is set to a small amount. For this reason, in addition to the effect of the first invention, the anti-glare function can be expressed without forming excessive irregularities on the surface, and the effect of suppressing glare on the surface and preventing reflection is efficiently obtained. Can be expressed.

In the surface material for a high-definition display of the third invention, the anti-glare function can be improved in addition to the effects of the first or second invention by the functional layer being a light diffusion layer.
In the high-definition display according to the fourth invention and the high-definition touch panel according to the fifth invention, the surface material for the high-definition display according to any one of the first to third inventions is arranged on the outermost surface. Even with a high display and touch panel, there is no glare or the like, and the fingerprint can be made inconspicuous.

In the following, embodiments that are considered to be the best of the present invention will be described in detail.
The surface material for high-definition display of the present embodiment (hereinafter also referred to as a surface material for display or simply a surface material) is used by being disposed on the surface of a display such as a touch panel or a liquid crystal panel. Such a display surface material is constituted by providing an antiglare layer on a transparent substrate with an antiglare layer alone or via a functional layer, the average interval of irregularities on the surface of the antiglare layer is 20 to 300 μm, and the surface energy is 30 to 70 mN / m, and the haze value of the surface material is set to 3 to 50%. By setting the average interval of the irregularities on the surface of the antiglare layer to 20 to 300 μm, the reflected light is diffused and the antiglare property can be exhibited. Also, by setting the surface energy of the antiglare layer surface to 30 to 70 mN / m, the compatibility with the biological lipid component that forms fingerprints and the like is improved, and the biological lipid component is formed in the concave portion of the antiglare layer surface. It can be difficult to guide and stand out. Furthermore, the biologically derived lipid component on the surface of the antiglare layer can be made inconspicuous by setting the haze value to 3 to 50% and adjusting the cloudiness. Therefore, the visibility with respect to a high-definition display can be improved.

  The antiglare layer is usually provided directly on the transparent substrate, but at least one functional layer can be provided between the transparent substrate and the antiglare layer. In addition, a coating layer having compatibility with a biological lipid component that forms a fingerprint or the like can be formed on the antiglare layer. And the adhesive layer is provided in the back surface of the surface material for displays, and a surface material is stuck and used for the front surface of the touchscreen as a display, or a liquid crystal panel with the adhesive layer.

  Here, the high-definition display will be described. The high-definition display means a high-quality display having a high image resolution. That is, it is a display in which the number of pixels is increased in order to make an image (video) more precise. In a normal display, the number of pixels is about 50 to 100 (dots per inch; dpi, image resolution) per 2.54 cm (1 inch) in length and width of the display screen, but in a high-definition display, the number of pixels is about 100 to 300 dpi. belongs to.

  When a display surface material (film) having a conventional anti-glare layer is placed on a high-definition display, the surface of the anti-glare layer is more uneven than the black matrix openings at the pixel boundaries of the display. In addition, the lens effect due to the unevenness works. For this reason, the scintillation phenomenon that the image light is scattered and glaring and shining occurs, and the visibility of characters, lines, etc. is significantly impaired.

Next, each component of the display surface material will be described in order.
As the transparent substrate, a transparent resin film, a transparent resin sheet, a transparent glass plate or the like is used, and is not particularly limited. Specific examples of the resin material that forms the transparent substrate include poly (meth) acrylic resins, poly (meth) acrylonitrile resins, polystyrene resins, polysulfone resins, polyethersulfone resins, and polyether resins. , Polymethylpentene resin, triacetate cellulose (TAC) resin, polyethylene terephthalate (PET) resin, polyurethane resin, regenerated cellulose resin, diacetyl cellulose resin, acetate butyrate cellulose resin, polyester resin, acrylonitrile Styrene-butadiene terpolymer resin, polycarbonate resin, polyether ketone resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl alcohol resin, nylon resin, polyethylene resin, polypropylene Emissions-based resin, polyamide resin, polyimide resin, and norbornene resin. Among these, poly (meth) acrylic resins, polystyrene resins, triacetate cellulose (TAC) resins, polyethylene terephthalate (PET) resins, and polycarbonate resins are preferable from the viewpoints of versatility and application results. When using a polarizing plate as a functional layer, triacetate cellulose (TAC) resin is usually used.

  The thickness of the transparent substrate is usually 10 to 5000 μm, preferably 25 to 1000 μm, more preferably 35 to 500 μm. If this thickness is less than 10 μm, the workability is poor and the strength of the transparent substrate tends to decrease. On the other hand, when the thickness exceeds 5000 μm, it is meaningless because it is unnecessarily thick.

Next, the antiglare layer will be described.
The antiglare layer is a layer that has irregularities on its surface, and light can be reflected and diffused on the irregularities (surface diffusibility) to exhibit a function of exhibiting antiglare properties. In order to express the surface diffusibility, it can be achieved by controlling the uneven shape on the surface of the antiglare layer. Regarding the uneven shape on the surface of the antiglare layer, it is necessary that the average interval (Sm) of the unevenness defined in JIS B 0601-1994 is 20 to 300 μm, preferably 30 to 200 μm, and 30 to 100 μm. It is particularly preferred that If this Sm is 20-300 micrometers, when a surface material is installed on a high-definition display, glare is suppressed and it becomes possible to ensure the favorable visibility of a display. Furthermore, by setting Sm to 30 to 100 μm, glare is further suppressed, and better visibility can be ensured. Specifically, as shown in Examples described later, when Sm is 55 to 90 μm (Examples 3 to 8), compared to the case where Sm is 230 μm or 150 μm (Examples 1 and 2), In addition to excellent fingerprint visibility and display visibility, it is possible to effectively suppress glare in particular.

  Further, the arithmetic average roughness (Ra) defined in JIS B 0601-1994 on the surface of the antiglare layer is preferably 0.3 μm or less, and the ten-point average roughness (Rz) is preferably 2.0 μm or less. More preferably, Ra is 0.01 to 0.2 μm, Rz is 0.1 to 1.5 μm, Ra is 0.05 to 0.15 μm, and Rz is 0.5 to 1.3 μm. Most preferred. By setting the Ra and Rz of the irregularities on the surface of the antiglare layer in such a range, when the surface material is arranged on a high-definition display, it is possible to ensure good visibility of the display without glare. Become.

  The glare appears because the unevenness on the surface of the antiglare layer acts as a lens. The size of the lens is correlated with the value of Sm. If Sm is in the above-mentioned range, glare is suppressed when it is installed on a so-called high-definition display surface. When the relationship with the pixel is clearly defined, Sm is preferably in the range of 1 to 80%, more preferably in the range of 1 to 65%, and 1 to 50% of the size of one pixel. The range is most preferable.

  Further, the 60 ° gloss value representing the surface gloss is preferably 100% or less, more preferably 90% or less, more preferably 10 to 90%, and most preferably 50 to 90%. preferable. Here, the 60 ° gloss value is a value obtained by measuring in accordance with JIS K7105, measuring the specular reflection component with a light receiver by applying light from a standard light source to the sample at a specified angle. The reference surface is the glass surface, and its value is 100%. When the gloss value exceeds 100%, the antiglare property on the front surface of the display is insufficient, and the effect of preventing reflection when installed on the display surface is insufficient. The gloss value correlates with the uneven shape on the surface of the antiglare layer, and that the gloss value is 100% or less indicates that it is denser than the uneven shape when the value exceeds that value.

  As described above, the surface of the antiglare layer is uneven, and the surface energy needs to be 30 to 70 mN / m in order to improve the compatibility with biological lipid components such as fingerprints. It is preferably 35 to 70 mN / m, and more preferably 37 to 70 mN / m. When this surface energy is 30 to 70 mN / m, the antiglare layer is easily adapted to the lipid component from the living body, and the living body lipid component is promptly guided to the concave portion of the surface of the antiglare layer and adheres to the living body. It is presumed that a function that makes it difficult to visually recognize the fingerprint due to the derived lipid component can be expressed. When the surface energy is less than 30 mN / m, the biological lipid component is easily converted into microdroplets and the light is irregularly reflected, and it is difficult to absorb the biological lipid component based on the capillary phenomenon due to the surface irregularities, and the like. The visibility becomes worse and is inappropriate. Moreover, when it exceeds 70 mN / m, it becomes difficult to form such an anti-glare layer. The method for measuring the surface energy is not particularly limited, and any method may be adopted, but it is preferable to measure in accordance with JIS K6768 “wetting tension test method”.

  Any resin (binder resin) can be used for the antiglare layer without particular limitation as long as it is a material having such surface energy, but it is usually formed using a transparent resin as a constituent component. As such a transparent resin, for example, an active energy ray curable resin, a thermosetting resin, a thermoplastic resin, or the like can be used. Among these, it is preferable to use an active energy ray-curable resin or a thermoplastic resin from the viewpoints of productivity and various physical properties.

  When an active energy ray-curable resin is used, a polymerizable component is essential as a constituent component. Examples of such polymerizable components include monofunctional monomers, polyfunctional monomers, vinyl groups and (meth) acryloyl group-containing oligomers (hereinafter referred to as polymerizable oligomers), vinyl groups and (meth) acryloyl groups. One type or two or more types are selected and used from the polymers having the following (hereinafter referred to as polymerizable polymers). In addition, photodecomposition type or thermal decomposition type polymerization initiators, oligomers that do not contain vinyl groups or (meth) acryloyl groups (hereinafter referred to as non-polymerizable oligomers), vinyl groups or (meth) acryloyl groups are included as necessary. No additives (hereinafter referred to as non-polymerizable polymers), metal oxides, surfactants, diluent solvents, photosensitizers, stabilizers, ultraviolet absorbers, infrared absorbers, antioxidants, etc. You may mix | blend.

  The surface energy can be controlled by, for example, the types and amounts of monofunctional monomers and metal oxides. In the case of using a polymerizable oligomer, a polymerizable polymer, a non-polymerizable oligomer, or a non-polymerizable polymer (these two kinds of oligomers and two kinds of polymers are collectively referred to as “each oligomer or each polymer”). For this, the type and amount of the monofunctional monomer constituting each “oligomer or polymer” may be considered at the monofunctional monomer level.

  For example, in the combination of “each oligomer or each polymer” and a monofunctional monomer and polyfunctional monomer that does not use a metal oxide, the amount of the monofunctional monomer is such that the surface energy is 30 to 70 mN / m. There is no particular limitation as long as the resin can be formed. When only the monofunctional monomer is an active ingredient for achieving the surface energy of 30 to 70 mN / m, the amount of the monofunctional monomer is usually 10% by mass or more, preferably in the polymerizable component. Is 30% by mass or more, more preferably 50% by mass or more, and most preferably 75% by mass or more. When this ratio is less than 30% by mass, the coating layer tends to be poorly compatible with the biological lipid component, and when it is less than 10% by mass, there is almost no familiarity with the biological lipid component.

  Other additives that can be added as necessary are not problematic within the range usually used, but the polymerization initiator such as photodegradable type or thermal decomposable type with respect to the active energy ray-curable resin has a polymerizable component of 100 mass. It is desirable that it is 0.01-20 mass parts with respect to a part. When the blending ratio is less than 0.01 parts by mass, the film obtained from the composition for forming an antiglare layer is not completely cured and is not preferable because curing becomes insufficient. On the other hand, if it exceeds 20 parts by mass, curing is sufficient, but no further effect can be expected, and the amount is unnecessarily large and wasted. Further, the type of polymerization initiator such as photodecomposition type or thermal decomposition type used can be used without any particular limitation.

  In addition, when “each oligomer or each polymer” is added in the combination of the monofunctional monomer and the polyfunctional monomer, the monofunctional monomer for achieving the surface energy of 30 to 70 mN / m is used. The monomer is usually 10% by mass or more, preferably 30% by mass or more, and more preferably 50% by mass in the total amount of the monofunctional monomer, polyfunctional monomer and “each oligomer or each polymer”. As mentioned above, Most preferably, it is 75 mass% or more. When this proportion is less than 30% by mass, the antiglare layer tends to be inferior with the biological lipid component, and with less than 10% by mass, there is almost no familiarity with the biological lipid component. In addition, the addition amount of a nonpolymerizable oligomer or a nonpolymerizable polymer is usually 100 parts by mass or less, preferably 10 to 80 parts by mass with respect to 100 parts by mass of the polymerizable component. When the added amount is 10 to 80 parts by mass, the compatibility with the biological lipid component and the strength that is a feature of the active energy ray-curable resin coating are excellent.

  When a thermoplastic resin is used as a composition for forming an antiglare layer, the constituent components of the composition for forming an antiglare layer are obtained by polymerizing a monofunctional monomer used in the case of the active energy ray-curable resin. Polymers that do not contain acrylic functional groups are essential, and as necessary, surfactants, diluting solvents, stabilizers, UV absorbers, infrared absorbers, antioxidants, etc. may be added. May be.

  The monofunctional monomer is not particularly limited as long as it can form a resin having a surface energy of 30 to 70 mN / m. As the monofunctional monomer effective for increasing the surface energy, for example, the following monofunctional monomers are preferable. That is, (meth) acrylic acid ester, itaconic acid ester or fumaric acid ester is mentioned as a compound which is an ester compound with an alcohol having 1 to 20 carbon atoms and does not contain a fluorine atom. Furthermore, (meth) acrylic acid amide which is an amide compound with an amine having 1 to 10 carbon atoms and does not contain a fluorine atom can be mentioned. In addition, styrene and substituted styrene containing no fluorine atom can be mentioned. Other examples include N-vinyl-2-pyrrolidone and substituted N-vinyl-2-pyrrolidone containing no fluorine atom.

  Specific examples of the monofunctional monomer include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, Isobutyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, (meth) acrylic Cetyl acid, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, tricyclodecyl (meth) acrylate, benzyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, dicyclopentenyl (meth) acrylate Oxyethyl, (meth) acrylic acid dicyclopentanyl, (meth) acrylic acid Tamethylpiperidyl, (meth) acrylic acid ethyl hexahydrophthalate, (meth) acrylic acid 2-hydroxypropyl ethyl phthalate, (meth) acrylic acid 2-hydroxybutyl, (meth) acrylic acid butoxyethyl, (meth) acrylic (Meth) acrylic acid esters such as phenoxyethyl acid, methoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, and methoxypolyethylene glycol (meth) acrylate, styrene, α-methylstyrene, p (m ) -Methoxystyrene, di-t-butyl fumarate, di-n-butyl fumarate, diethyl fumarate, mono (di) methyl itaconate, mono (di) ethyl itaconate, N-isopropylacrylamide, N-vinyl-2- Preferably it contains pyrrolidone .

  Since the higher the surface energy, the more effectively the attached fingerprint can be prevented from being noticeable, it is more preferable to include the following monofunctional monomer. As such monofunctional monomers, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, (meth) acrylic Isobutyl acid, isodecyl (meth) acrylate, stearyl (meth) acrylate, cetyl (meth) acrylate, cyclohexyl (meth) acrylate, tricyclodecyl (meth) acrylate, benzyl (meth) acrylate, (meth) Tetrahydrofurfuryl acrylate, dicyclopentanyl (meth) acrylate, pentamethylpiperidyl (meth) acrylate, ethyl hexahydrophthalate (meth) acrylate, ethyl (meth) acrylate 2-hydroxypropyl phthalate, ( (Meth) butoxyethyl acrylate, (meth) acrylic acid phenoxy Chill, (meth) acrylic acid methoxy diethylene glycol, (meth) (meth) acrylic acid esters such as acrylic acid methoxy triethylene glycol, styrene, include N- isopropylacrylamide.

  These preferred monofunctional monomers can be used alone or in combination of two or more, but the proportion of the active energy ray-curable resin or thermoplastic resin is preferably 30% by mass or more, and more preferably 50% by mass or more. More preferably, 75% by mass or more is most preferable. When this ratio is less than 30% by mass, the antiglare layer tends to be unable to exhibit the surface energy necessary for its surface.

  Examples of the polyfunctional monomer include esterified products of polyhydric alcohol and (meth) acrylic acid, polyfunctional polymerizable compounds containing two or more (meth) acryloyl groups such as urethane-modified acrylate, and the like. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, polypropylene glycol, propanediol, butanediol, pentanediol, Divalent alcohols such as hexanediol, neopentyl glycol, 2-ethyl-1,3-hexanediol, 2,2′-thiodiethanol, 1,4-cyclohexanedimethanol; trimethylolpropane, glycerol, pentaerythritol, di Examples thereof include trivalent or higher alcohols such as glycerol, dipentaerythritol, and ditrimethylolpropane.

  The urethane-modified acrylate can be obtained by a urethanization reaction between an organic isocyanate having a plurality of isocyanate groups in one molecule and a (meth) acrylic acid derivative having a hydroxyl group. Examples of organic isocyanates having a plurality of isocyanate groups in one molecule include two isocyanates in one molecule such as hexamethylene diisocyanate, isophorone diisocyanate, tolylene diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, and dicyclohexylmethane diisocyanate. Organic isocyanate having a group, organic isocyanate having three isocyanate groups in one molecule obtained by subjecting these organic isocyanates to isocyanurate modification, adduct modification, biuret modification, and the like.

  Among them, hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, and tripropylene di (meth) acrylate from the viewpoint of improving coating strength and availability. (Meth) acrylic acid esters such as glycol, tri (meth) acrylic acid polymethylolpropane, tri (meth) acrylic acid pentaerythritol, hexa (meth) acrylic acid dipentaerythritol, hexamethylene diisocyanate and (meth) acrylic acid 2 -Adducts of hydroxyethyl, adducts of isophorone diisocyanate and 2-hydroxyethyl (meth) acrylate, adducts of tolylene diisocyanate and 2-hydroxyethyl (meth) acrylate, adduct-modified isophorone diisocyanate and (meta Adducts of adduct and biuret modified isophorone diisocyanate and 2-hydroxyethyl (meth) acrylate and 2-hydroxyethyl acrylate is preferable.

  Oligomers that do not contain vinyl or (meth) acryloyl groups include acrylic oligomers, polyester oligomers, epoxy oligomers, urethane oligomers, polyether oligomers, alkyd oligomers, polybutadiene oligomers, polythiol polyene oligomers and spiroacetal oligomers, polyvalent oligomers. The oligomer which consists of polyfunctional (meth) acrylic acid ester of alcohol is mentioned.

  Examples of the oligomer containing a vinyl group or a (meth) acryloyl group include an oligomer obtained by adding a vinyl group or a (meth) acryloyl group to the above oligomer. Examples of the polymer that does not contain a vinyl group or (meth) acryloyl group include polymer types of oligomers that do not contain the vinyl group or (meth) acryloyl group. Examples of the polymer having a vinyl group or a (meth) acryloyl group include polymer types of oligomers having the vinyl group or the (meth) acryloyl group.

  These oligomers and polymers are preferably selected so that various functions can be exhibited, or adhesion with adjacent layers can be improved. For example, in terms of adhesion, it is preferable to select a resin that has an affinity for the resin forming the adjacent layers. That is, a block copolymer comprising both a polymer having an affinity for an active energy ray-curable resin or a thermoplastic resin and a polymer having an affinity for a layer adjacent to the active energy ray-curable resin or the thermoplastic resin. It is more preferable to select a segmented copolymer such as a polymer or a graft copolymer.

  Examples of the polymerization initiator include known compounds that start polymerization upon irradiation with active energy rays such as ultraviolet rays and light. For example, benzophenones, acetophenones, α-amyloxime esters, Michler benzoylbenzoate, tetramethylchuram mono Examples thereof include sulfide and thioxanthones. Specifically, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane- 1-one, 1- [4- (2-hydroxyethoxy) phenyl] -2-hydroxy-2-methyl-1-propan-1-one, benzoin, 2,2-dimethoxy-1,2-diphenylethane-1 -One, benzophenone, [4- (methylphenylthio) phenyl] phenylmethanone, 4-hydroxybenzophenone, 4-phenylbenzophenone, 3,3 ', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, α-amyloxime ester, Michler Emissions benzoyl benzoate, tetramethylthiuram monosulfide, and the like.

  The surfactant is used as needed for the purpose of compatibilization when various raw materials are blended and the smoothness of the antiglare layer surface. As such a surfactant, it is important to maintain the surface energy at 30 to 70 mN / m. For that purpose, acrylic copolymers (ionic and nonionic), methacrylic copolymers, It is preferable to use a leveling agent for solvent-type paints.

  Examples of commercially available surfactants include “BYK-361”, “BYK380”, “BYK-390”, “BYKetol-WS”, “BYK-OK”, “NANOBYK-3601” (manufactured by BYK Chemie) and the like. . The blending ratio of the surfactant in the composition for forming an antiglare layer is preferably 0.01 to 10 parts by weight, and preferably 0.01 to 5 parts per 100 parts by weight of the solid content of the composition for forming an antiglare layer. Part by mass is more preferable. When this blending ratio exceeds 10 parts by mass, it is not necessary since it is an amount more than necessary to develop compatibilization or smoothness of the antiglare layer. On the other hand, when the amount is less than 0.01 parts by mass, a sufficient effect of the surfactant tends not to be obtained, which is not preferable. Polysiloxane compounds can also be used as the surfactant, but depending on the amount and type of addition, the surface energy may be less than 30 mN / m, so it is necessary to adjust the amount added.

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

  Examples of the chain having a repeating unit include a polyoxyalkylene chain such as a polyoxyethylene chain, a polyoxypropylene chain, a polyoxytetramethylene chain, and a poly (oxyethyleneoxypropylene) chain, a polycaprolactone chain, and a polyethylene sebacate chain. And polyester chains such as polyethylene adipate chains. The ends of these chains may be hydroxyl groups, carboxyl groups, (meth) acryloyl groups or vinyl groups, or the ends may be blocked with organic groups. For example, it may be blocked by alkyl etherification, alkyl esterification or the like. Further, this chain is usually bonded to a silicon atom via an alkylene group such as a dimethylene group or a trimethylene group, but is not limited thereto.

  As the polysiloxane compound, polyether-modified polydimethylsiloxane is preferable, and commercially available products such as “BYK-306”, “BYK330”, “BYK-341”, “BYK-344”, “BYK-307”, “BYK” -333 "(manufactured by Big Chemie)," VXL4930 "(manufactured by Vianova Resins) and the like.

  The diluting solvent is used to adjust the viscosity of the coating solution when applying the antiglare layer-forming composition comprising an active energy ray-curable resin or a thermoplastic resin. It is not limited. For example, toluene, xylene, ethyl acetate, propyl acetate, butyl acetate, methyl cellosolve, ethyl cellosolve, ethyl cellosolve acetate, methyl alcohol, ethyl alcohol, isopropyl alcohol, butyl alcohol, acetone, methyl ethyl ketone, methyl isobutyl ketone , Cyclohexanone, hexane, heptane, octane, decane, dodecane, propylene glycol monomethyl ether, 3-methoxybutanol and the like.

  As the photosensitizer, a known compound for the above polymerization initiator is used. For example, tributylamine, triethylamine, polyethyleneimine, poly-n-butylphosphine, p-dimethylaminobenzoic acid ethyl ester, p-dimethylaminobenzoic acid. And tertiary amines such as acid isoamyl ester.

  In the above 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 not contained at all. Most preferred. In other words, the active energy ray-curable resin or the thermoplastic resin is preferably composed of atoms other than fluorine atoms, or is composed of 99.95% by mass or more of atoms other than fluorine atoms. More preferably, the content is 99% by mass or more. When the proportion of fluorine atoms exceeds 0.05% by mass, the fluorine atoms become a low surface free energy component, and the biological lipid component tends to form microdroplets on the outermost surface of the surface material. This is not preferable because the fingerprint becomes conspicuous and the visibility of a display image or the like after the fingerprint is attached is lowered.

  The resin forming the antiglare layer preferably contains a metal oxide (fine particles) in order to make fingerprints due to biologically derived lipid components adhering to the surface more inconspicuous. Various types of metal oxides are exemplified and are not particularly limited, but preferably silicon oxide (silica), hollow silica, aluminum oxide (alumina), titanium oxide, antimony oxide, zinc oxide, tin oxide, zirconium oxide. Etc. are used. One or more of these metal oxides are appropriately selected and used. The form of the metal oxide to be added is not particularly limited, but forms such as powder and sol are suitable.

  Although the average particle diameter of the metal oxide is not particularly limited, it is preferably 1 to 200 nm, more preferably 1 to 150 nm in consideration of the dispersibility of the metal oxide and the transparency of the film. Most preferably, it is 80 nm. When the average particle diameter of the metal oxide is in a preferable range, the coating is more familiar with the biological lipid component, and the fingerprint attached to the coating surface is less noticeable. When the average particle diameter of the metal oxide is less than 1 nm, it is difficult to produce and obtain, and fingerprints due to biological lipid components adhering to the coating surface become conspicuous, which is not preferable. On the other hand, when it exceeds 200 nm, the dispersibility of a metal oxide and the transparency of a film will fall.

  In including the metal oxide in the composition for forming an antiglare layer, the dispersion stability in the composition for forming an antiglare layer, adhesion with a binder resin, etc. are not reduced in advance in an organic dispersion medium. It is desirable to use it in the form of an organic sol dispersed in. Furthermore, in order to improve the dispersion stability of the metal oxide fine particles, the adhesion in the binder resin, etc. in the composition for forming an antiglare layer, the surface of the metal oxide fine particles is previously used with various coupling agents. Can be modified. Examples of the various coupling agents include organic substituted silicon compounds; metal alkoxides such as aluminum, titanium, zirconium, antimony or mixtures thereof; salts of organic acids; coordination compounds bonded to coordination compounds, and the like. Can be mentioned. The surface of the metal oxide to be used is desirably surface-modified with a polymerizable functional group such as an allyl group or an acryloyl group in order to improve adhesion with the binder resin. The proportion of the metal oxide in the polymerizable component is preferably 5 to 95% by mass, more preferably 20 to 80% by mass, and most preferably 35 to 70% by mass. When this ratio is less than 5% by mass, the function of making fingerprints due to biological lipid components adhering to the surface inconspicuous decreases. On the other hand, when the ratio exceeds 95% by mass, the strength, which is a feature of the active energy ray-curable resin film, is insufficient, which is not preferable.

  When a thermoplastic resin is used in the composition for forming an antiglare layer, there is no particular limitation as long as a resin having a surface energy of 30 to 70 mN / m can be formed. It is mainly composed of a polymer obtained by polymerizing a monofunctional monomer used in the case of the active energy ray-curable resin or a polymer containing no acrylic functional group. In addition, additives such as a diluent, a stabilizer, an ultraviolet absorber, an infrared absorber and an antioxidant may be added as necessary. A thermoplastic resin can use 1 type (s) or 2 or more types, and when using 2 or more types, the ratio can be set arbitrarily. Other additives that can be added as necessary can be used without any problem within the usual range.

  When a thermosetting resin is used for the composition for forming an antiglare layer, the resin is not particularly limited as long as the surface energy is 30 to 70 mN / m. Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea co-condensation resin, silicon resin, poly A siloxane resin or the like can be used. These thermosetting resins can use 1 type (s) or 2 or more types, and when using it in combination of 2 or more types, the ratio can be set arbitrarily. If necessary, additives such as polymerization initiators, metal oxides, surfactants, diluents, stabilizers, UV absorbers, infrared absorbers, and antioxidants are added to thermosetting resins according to conventional methods. May be.

  As a method for applying the antiglare layer forming composition on the transparent substrate, a roll coating method, a spin coating method, a dip coating method, a brush coating method, a spray coating method, a bar coating method, a knife coating method, a die coating method, Any known method such as a gravure coating method, curtain flow coating method, reverse coating method, kiss coating method or comma coating method may be used. At the time of application, in order to improve interlayer adhesion as necessary, the layer surface may be subjected to some pretreatment such as corona discharge treatment in advance.

As the active energy ray 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 radioactive element or the like is used. The irradiation amount of the energy ray source is preferably 50 to 5000 mJ / cm ² as an integrated light amount at an ultraviolet wavelength of 365 nm. When the irradiation amount is less than 50 mJ / cm ² , curing of the composition for forming an antiglare layer becomes insufficient, which is not preferable. On the other hand, when it exceeds 5000 mJ / cm ² , the active energy ray-curable resin tends to be colored, which is not preferable.

  The antiglare layer is preferably selected so that the adhesion between adjacent layers can be improved. Therefore, it is preferable to select a resin having an affinity for the resin forming the adjacent layers. That is, a block comprising both a polymer having affinity for the active energy ray-curable resin or thermoplastic resin and a polymer having affinity for the layer adjacent to the active energy ray-curable resin or thermoplastic resin. A segmented copolymer such as a copolymer or a graft copolymer is preferably selected.

  A method for forming irregularities on the surface of the antiglare layer is performed according to a conventional method, and the method is not particularly limited. For example, a method by adding fine particles, or a stamp of an original plate that is a negative image having a desired irregular shape, An example is a method using uneven transfer. Although the method by uneven | corrugated transfer is not specifically limited, For example, a mold type, a sheet type, a film type etc. are mentioned.

  In the method by addition of fine particles, inorganic particles and plastic beads (resin particles) can be cited as the fine particles, but the viewpoint that a desired refractive index can be selected when adjustment of the difference in refractive index with transparency or transparent resin is required. Then, plastic beads are preferable. Examples of the material of such plastic beads include vinyl chloride resin, (meth) acrylic resin, acrylic-styrene copolymer, polystyrene resin, melamine resin, polyethylene resin, and polycarbonate resin. The average particle diameter of these fine particles is preferably 0.1 to 10 μm, more preferably 0.5 to 5 μm. If the average particle size is less than 0.1 μm, the antiglare property tends to be insufficient, and if it exceeds 10 μm, the haze value becomes too high and the transparency tends to be impaired. These fine particles can also be used for the light diffusion layer.

  Moreover, as a compounding quantity added to the transparent resin of fine particles, it is 0.5-30 mass% normally with respect to a transparent resin, Preferably it is 2-25 mass%, More preferably, it is 3-20 mass%, Most preferably, it is 5-5 mass%. 15% by mass. If the blending amount is less than 0.5% by mass, sufficient antiglare property cannot be obtained, and it becomes difficult to form sufficient irregularities sufficient to develop a capillary phenomenon so as to absorb a biological lipid component. Yes, if it exceeds 30% by mass, the haze value becomes too high, and image recognizability such as whitening becomes worse when installed on the display surface.

  Subsequently, in the method of forming an antiglare layer by uneven transfer, for example, it can be produced using a composition for forming an antiglare layer to which a transparent resin or the above-mentioned fine particles are added. Specifically, in the case of an active energy ray curable resin, the composition for forming an antiglare layer is applied onto the original plate, and the active energy ray is applied to such an extent that flexibility or thermoplasticity capable of uneven transfer can be maintained if necessary. Pre-curing is performed. Then, after pressing an original plate against a transparent substrate, it can be produced by removing the original plate or curing it by irradiating active energy rays in the same state without removing the original plate. In addition, you may heat as needed at the time of a press. Moreover, in the case of a thermoplastic resin, uneven | corrugated transcription | transfer can be performed by pressing the formed film at the temperature more than a softening point after apply | coating and drying the composition for glare-proof layer formation, and drying. Examples of the original plate include a forming film, a forming roll, a flat plate mold for forming press, and the like, and a commercially available AG (anti-glare, anti-glare) film can also be used as the forming film. It is.

  The thickness of the antiglare layer may be not less than the desired height difference of the unevenness, but is usually 0.1 to 1000 μm, preferably 0.1 to 200 μm, more preferably 0.1 to 100 μm. If this thickness is less than 0.1 μm, it becomes difficult to form unevenness with a desired height, and if it exceeds 1000 μm, it is meaningless because it becomes unnecessarily thick. In designing the antiglare layer to have high definition, it is preferable to prevent a decrease in contrast due to glare and white blur. As described above, the glare can be solved by optimizing the surface unevenness. White blur can be solved by controlling the haze value due to internal diffusion. From the above, it is necessary to balance surface diffusion and internal diffusion due to surface irregularities.

  In order to express the internal diffusibility, it is preferable to fill the inside of the film with fine particles having a particle diameter smaller than the film thickness of the antiglare layer. The haze value is applied as the index. In the surface material for high-definition displays, the haze value (haze value, haze value) is measured in accordance with JIS K7136, and the value obtained by dividing the scattered light transmittance by the total light transmittance is expressed as a percentage. is there. This haze value is 3 to 50%, preferably 3 to 30%, more preferably 3 to 25%, and most preferably 3 to 20%. When the haze value is less than 3%, the antiglare effect is insufficient, and when the surface material is arranged on the display surface, the reflection preventing effect is insufficient. If it is larger than 50%, the contrast is lowered or the display image becomes white when placed on the display surface.

Next, the coating layer provided on the antiglare layer will be described.
The coating layer is a fingerprint familiar layer having good conformability (affinity) with the fingerprint since the fingerprint mainly includes a biological lipid component, that is, an oil component. In order for the familiarity with the fingerprint to be good, the surface energy of the coating layer needs to be 30 to 70 mN / m as in the case of the antiglare layer. Furthermore, in order to improve the familiarity with the fingerprint, the proportion of fluorine atoms in the resin forming the coating layer is preferably 0.05% by mass or less, more preferably 0.01% by mass or less. Preferably, it is most preferable not to include at all. That is, the resin forming the coating layer is preferably composed of atoms other than fluorine atoms, or atoms other than fluorine atoms are preferably composed of 99.95% by mass or more, and 99.99% by mass or more. More preferably, it is configured. In addition, as the component for forming the coating layer, the component for forming the antiglare layer is appropriately selected, and the method for forming the antiglare layer is appropriately employed.

  If the film thickness of a coating layer is a grade which does not lose the unevenness | corrugation of an anti-glare layer, there will be no problem in particular. Specifically, the thickness of the coating layer is preferably 1 to 1000 nm, more preferably 5 to 500 nm, and most preferably 10 to 300 nm. If this film thickness is less than 1 nm, there is a tendency that coating cannot be performed uniformly. On the other hand, when the thickness exceeds 1000 nm, the coating layer cannot follow the unevenness of the antiglare layer and fills the unevenness, so that the “function of making fingerprints less noticeable” tends to decrease. However, the film thickness when coated on a smooth surface under the condition of coating on the uneven surface of the antiglare layer is regarded as the film thickness.

Next, the functional layer provided between the transparent substrate and the antiglare layer will be described.
In the display surface material, a desired functional layer can be provided as a single layer or a plurality of layers between the transparent substrate and the antiglare layer, if necessary. Examples of such a functional layer include a light diffusion layer, a polarizing plate, an ultraviolet absorbing layer, an infrared absorbing layer, an antireflection layer, a soft (impact resistant) layer, a hard coat layer, a conductive layer, an antistatic layer, a heat insulating layer, and a reflective layer. Layer, primer layer and the like.

  When the functional layer is a light diffusion layer, when the total haze value of both the antiglare layer and the light diffusion layer is defined as the haze value, the haze value resulting from the light diffusion layer (with the antiglare layer on the top) The haze value before formation) is preferably 50% or less with respect to the haze value after formation of the antiglare layer (total haze value). When the ratio of the haze value exceeds 50%, the display image is white, which is not preferable because the contrast is lowered.

  The light diffusion layer increases the proportion of light in the antiglare layer in the normal direction relative to the proportion of light in the normal direction in the antiglare layer by diffusing light from the display in the surface material. To express the function In order to express this function, the light diffusion layer is made by dispersing fine particles (translucent fine particles) in a transparent resin, and in order to maintain the transparency of the light diffusion layer, the light is refracted between the transparent resin and the fine particles. The difference in rate is preferably 0.01 to 0.5, and the average particle diameter of the fine particles is preferably 0.1 to 7.5 μm in order to ensure scattering properties.

  When the difference in refractive index is less than 0.01, in order to exert the effect of light diffusion, it is necessary to mix a large number of light-transmitting fine particles. Therefore, the light diffusion layer and the transparent substrate or the light diffusion layer The adhesion between the antiglare layer and the antiglare layer is reduced, and when the light diffusing layer is formed, the coating suitability of the composition for forming a light diffusing layer containing a large amount of light-transmitting fine particles is reduced. Formation becomes difficult. On the contrary, when the difference in refractive index exceeds 0.5, the transparency is lowered, and the sharpness of the image and the contrast are lowered when the surface material is applied to the display.

  Further, when the average particle diameter is less than 0.1 μm, the light diffusing layer forming composition used for forming the light diffusing layer tends to aggregate the light transmissive fine particles, and the light diffusing layer forming composition. As a result, the light-diffusing layer is difficult to form uniformly. Conversely, if the average particle diameter exceeds 7.5 μm, glare starts to appear, which is not preferable. The thickness of the light diffusion layer is usually 0.1 to 1000 μm, preferably 0.1 to 200 μm, more preferably 0.1 to 100 μm. When the thickness is less than 0.1 μm, the light diffusion effect is not sufficient, and when it exceeds 1000 μm, the diffusion effect becomes excessive, and the sharpness of the image on the display is lowered.

  When the functional layer is a polarizing film, an antiglare polarizing film can be used. In the liquid crystal display, the term “polarizing plate” is often used. However, since the actual state is that of a relatively thick film or sheet, it is referred to as a polarizing film here. The polarizing film is a transparent plastic film (usually a TAC film) having a structure in which a polarizer composed of a polyvinyl alcohol (PVA) film stretched by adding iodine or a dye is sandwiched. . In addition to the polyvinyl alcohol film, a polyvinyl formal film, a polyvinyl acetal film, an ethylene-vinyl acetate copolymer saponified film, and the like can also be used as a polarizer material. Therefore, in manufacturing, one transparent plastic film of the polarizing film is treated as a transparent substrate, and a light diffusion layer, an antiglare layer, etc. are laminated, and if necessary, various layers as described above are formed. Or a surface material for a display is manufactured by adding a function to each layer.

  Such a functional layer can be formed using an inorganic material, an organic material, or a mixture thereof. The thickness is preferably 0.005 to 100 μm. Moreover, the formation method of a functional layer is not specifically limited, A dry coating method or a wet coating method can be taken. As the function of the functional layer, it is preferable to improve hardness, adhesion and scratch resistance.

  For example, in order to improve the scratch resistance, there are a method of increasing the hardness of the functional layer between the transparent substrate and the antiglare layer and a method of softening. 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, an organic substance, an inorganic substance, or a mixture thereof can be used. For example, in order to increase the hardness for the hard coat layer, it is preferable to include a crosslinkable curable monomer. The crosslinkable curable monomer is preferably one that cures in a short time by heating or irradiation with active energy rays such as ultraviolet rays and electron beams. Examples of the curable monomer include silicon compounds such as monofunctional or polyfunctional (meth) acrylic acid esters and tetraethoxysilane.

  Examples of the polyfunctional (meth) acrylic acid ester include dipentaerythritol hexaacrylate, tetramethylolmethane tetraacrylate (pentaerythritol tetraacrylate), tetramethylolmethane triacrylate (pentaerythritol totoacrylate), trimethylolpropane triacrylate, 1, Examples include 6-hexanediol diacrylate, polyfunctional alcohol derivatives such as 1,6-bis (3-acryloyloxy-2-hydroxypropyloxy) hexane, polyethylene glycol diacrylate, and polyurethane acrylate. Examples of the inorganic material include silica gel ultrafine particles.

  Next, the pressure-sensitive adhesive layer provided on the back surface of the display surface material is for attaching the surface material to the surface of the display. Examples of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer include acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. From the viewpoint of transparency, acrylic pressure-sensitive adhesives are preferable and removable. In this respect, a silicone-based pressure-sensitive adhesive is preferable. These pressure-sensitive adhesives can contain a plasticizer, a tackifier component and the like in addition to the pressure-sensitive polymer component, but it is desirable to determine the formulation so as not to impair the transparency. As the adhesive polymer which is the main component of the acrylic adhesive, a copolymer of (meth) acrylic acid alkyl ester having an alkyl group having 1 to 10 carbon atoms and a functional group-containing unsaturated monomer is preferable. . Examples of the (meth) acrylic acid alkyl ester having an alkyl group having 1 to 10 carbon atoms include 2-ethylhexyl acrylate, butyl acrylate, isooctyl acrylate, butyl methacrylate, and propyl methacrylate. Examples of the functional group-containing unsaturated monomer include acrylic acid, methacrylic acid, maleic acid, fumaric acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, and the like. As the adhesive polymer which is the main component of the rubber adhesive, a styrene-butadiene random copolymer, a styrene-isoprene block copolymer, natural rubber and the like are preferable. The thickness of the pressure-sensitive adhesive layer is preferably 5 to 100 μm.

  It is effective to provide the display surface material on the outermost surface of the display where the surface may be soiled by fingerprints when touched by a hand. Specifically, displays for displaying images of personal computers, word processors, televisions, mobile phones, portable terminals, game machines, automatic cash withdrawal and deposit devices, cash dispensers, vending machines, navigation devices, security system terminals, etc. The outermost surface of a touch panel (CRT, plasma display, liquid crystal display, electroluminescence display, field emission display, projection display, toner-based display used for electronic paper, etc.). Moreover, the outermost surface of glass cases and plastic cases, such as a showcase used for a display for a display, a show window, is mentioned.

  For example, in the case of a touch panel as a display, there are an integrated type incorporated in various displays as described above and a separate type arranged on the display surface of various display devices. Any known method can be adopted as the touch panel method, and it is not particularly limited. Specifically, for example, methods such as an ultrasonic method, a resistive film method, a capacitance method, an electric strain method, a magnetostriction method, an infrared method, and an electromagnetic induction method can be given. A resistive touch panel is preferable from the viewpoint of power consumption and price, and an electromagnetic induction touch panel is preferable from the viewpoint of resolution.

  Now, the operation of the present embodiment will be described. The display surface material is formed of a transparent base material and an antiglare layer having irregularities on the surface by a resin. When this surface material is used by being placed on the surface of a resistive film type touch panel, for example, the touch panel is operated by pressing the surface of the surface material with a finger. At this time, a biological lipid component that forms a fingerprint adheres to the surface of the surface material, and the image visibility of the touch panel decreases. In addition, when the touch panel is an electromagnetic induction system, it is operated by the input pen and not by touching the finger. However, when the input pen is operated, the palm touches the display surface and biological lipid components adhere to it. Even if it is not an operation, the living body-derived lipid component may adhere by touching the display screen with a fingertip. In such a case, the image visibility of the touch panel is reduced as in the case of the resistive film method.

  In this case, since the average interval Sm of the unevenness on the surface of the antiglare layer of the surface material is set to 20 to 300 μm, particularly Sm is set to 30 to 100 μm, glare is reduced. In addition, capillarity is expressed by the unevenness on the surface, and the biological lipid component that forms the fingerprint is guided to the recesses on the surface. Moreover, since the surface energy of the anti-glare layer is set to 30 to 70 mN / m, the anti-glare layer is easily adapted to the biological lipid component, and the biological lipid component is promptly guided to the concave portion on the surface. , Fingerprints are not visible. In addition, by setting the haze value of the surface material to 3 to 50%, the cloudiness is adjusted, and the fingerprint familiar on the surface of the antiglare layer becomes difficult to stand out. Therefore, these actions act synergistically and the image on the touch panel is clearly visually recognized.

The effects exhibited by the above embodiment will be described collectively below.
-In the surface material for high-definition displays of this embodiment, effective anti-glare property can be expressed by setting the average interval Sm of the irregularities on the surface of the anti-glare layer to 20 to 300 μm, and the surface energy of the anti-glare layer is set to 30 to 70 mN. By being / m, the familiarity with the biological lipid component by fingerprint can be improved. Furthermore, by making the haze value of the surface material 3 to 50%, fingerprints can be made more inconspicuous. As a result, the surface material has both an antiglare function and a function that makes the fingerprint attached to the surface less noticeable, and can improve the visibility of the display.

  The average particle diameter of the fine particles forming the antiglare layer is set in a small range, and the content of the fine particles is set in a small range. For this reason, an anti-glare function can be expressed without forming excessive unevenness on the surface, and an effect of suppressing glare and preventing reflection can be efficiently expressed.

-Since the said functional layer is a light-diffusion layer, an anti-glare function can be improved, suppressing a glare.
・ In high-definition displays and high-definition touch panels, the surface material for high-definition displays is arranged on the outermost surface, so even high-resolution displays and touch panels have no glare and make fingerprints inconspicuous. be able to.

Hereinafter, the embodiment will be described more specifically with reference to examples and comparative examples. The fingerprint visibility, surface roughness, haze value, and glare in each example were measured by the following methods.
(1) Fingerprint visibility Fingerprints were attached on the surface material for display, and the sensory evaluation by visual observation was performed on the visibility in the following four stages.

4: The fingerprint is not visible at all. 3: The fingerprint is slightly visible. 2: The fingerprint is thin but clearly visible. 1: The fingerprint is clearly visible.
(2) Surface roughness JIS B 0601-1994, using a surface roughness measuring machine Surfcorder SE4000 manufactured by Kosaka Laboratory Ltd., with a scanning range of 1.5 mm and a scanning speed of 0.1 mm / s. The average roughness Ra (μm), the ten-point average roughness Rz (μm), and the average interval Sm (μm) of irregularities were measured.
(3) 60 ° gloss value Based on JIS K7105, 60 ° gloss value (%) was measured using a portable gloss meter HG-268 manufactured by Suga Test Instruments Co., Ltd.
(4) Surface energy It measured by the method according to JISK6768 "wetting tension test method".
(5) Haze value A haze value (%) as an optical characteristic was measured using a direct reading haze meter (manufactured by Toyo Seiki Seisakusho, direct reading haze meter (No. 206)).
(6) Visibility evaluation of display image A surface material for display was mounted on the display, and visual sensory evaluation was performed on the visibility of the display image in the following four stages.

4: Clear, 3: Slightly clear, 2: Slightly lacking in clarity, 1: Image identification is difficult.
(7) Glare A display surface material was placed on the surface of a high-definition display or high-definition touch panel, and the glare was visually evaluated in the following three stages.

3: No glare, 2: Some glare, 1: Glare (Production Example 1)
(Production of poly (cyclohexyl methacrylate))
75 g of methyl isobutyl ketone was placed in a 300 ml three-necked flask equipped with a stirrer and heated to 70 ° C. under a nitrogen purge. Then, after reaching 70 ° C., 25 g of cyclohexyl methacrylate and 0.81 g of polymerization initiator perbutyl PV (manufactured by Nippon Oil & Fats Co., Ltd., 71% shell sol diluted product) were each divided into 3 parts and added dropwise over 1 hour. After completion of the dropping, polymerization was further performed at 70 ° C. for 3 hours, and then the temperature was raised to 80 ° C. and polymerization was continued for 3 hours. Thereafter, the mixture was cooled to complete the polymerization. Subsequently, reprecipitation was dropped into methanol and poly (cyclohexyl methacrylate) was obtained. As a result of measurement by gel permeation chromatography (GPC), the mass average molecular weight was 26,000 and the number average molecular weight was 9,000.
(Example 1)
(Anti-glare layer forming composition)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 60 parts by mass Trimethylolpropane triacrylate 10 parts by mass Polycyclohexyl methacrylate 30 parts by mass of Production Example 1 Crosslinked polystyrene fine particles (Soken Chemical Co., Ltd.) Manufactured by SX-130H; average particle size 1.3 μm) 3 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass This anti-glare layer forming composition is used as a transparent substrate with a roll coater to a thickness of 100 μm. The film was coated on the PET film so as to have a dry film thickness of 5 μm and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount: 400 mJ / cm ² ) and cured to form a single layer of an antiglare layer that would be well-fitted with fingerprints. In this way, a display surface material was produced. The antiglare layer had an Sm of 230 μm, an Ra of 0.20 μm, an Rz of 1.3 μm, a 60 ° gloss of 90%, and a haze value of the display surface material of 5.8%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 38 mN / m, and the fingerprint visibility evaluation was 3. Moreover, the visibility evaluation of the display image was 3, and the glare was 2.
(Example 2)
As a composition for forming an antiglare layer, a display surface material was prepared in the same procedure as in Example 1 except that 5 parts by mass of crosslinked polystyrene was used. The obtained antiglare layer had Sm of 150 μm, Ra of 0.16 μm, Rz of 1.2 μm, 60 ° gloss of 89%, and a haze value of the display surface material of 9.0%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 38 mN / m, and the fingerprint visibility evaluation was 3. Moreover, the visibility evaluation of the display image was 3, and the glare was 2.
(Example 3)
(Anti-glare layer forming composition)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 70 parts by mass Trimethylolpropane triacrylate 10 parts by mass Polycyclohexyl methacrylate 20 parts by mass Cross-linked polystyrene fine particles (SX-130H, manufactured by Soken Chemical Co., Ltd.) Average particle size 1.3 μm) 5 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass This anti-glare layer forming composition is dried on a PET film having a thickness of 100 μm by a roll coater. The film was applied to a thickness of 5 μm and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount: 400 mJ / cm ² ) and cured to form a single layer of an antiglare layer that would be well-fitted with fingerprints. In this way, a display surface material was produced. The antiglare layer had an Sm of 90 μm, an Ra of 0.17 μm, an Rz of 1.2 μm, a 60 ° gloss of 80%, and a haze value of the display surface material of 10.0%.

Next, a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive was formed on the surface opposite to the unevenness of the PET film. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 34 mN / m, and the fingerprint visibility evaluation was 3. Moreover, the visibility evaluation of the display image was 4, and the glare was 3.
Example 4
(Light diffusion layer forming resin composition)
Hexafunctional urethane acrylate (manufactured by 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 Cross-linked polystyrene fine particles (manufactured by Soken Chemical Co., Ltd., SX- 130H; average particle diameter 1.3 μm) 1 part by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass (composition for forming an antiglare layer)
Hexafunctional urethane acrylate (purchased UV-7600B manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 60 parts by mass Trimethylolpropane triacrylate 10 parts by mass Polycyclohexyl methacrylate 30 parts by mass Cross-linked polystyrene fine particles (manufactured by Soken Chemical Co., Ltd., SX-130H) Average particle diameter 1.3 μm) 5 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass The above resin composition for forming a light diffusion layer is dried on a PET film having a thickness of 100 μm using a roll coater. The film was applied to a thickness of 5 μm and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (integrated light amount 400 mJ / cm ² ) and cured to form a light diffusion layer.

Subsequently, the antiglare layer-forming resin composition was applied onto a light diffusion layer on a PET film having a thickness of 100 μm with a roll coater so that the dry film thickness was 2.5 μm, and then at 80 ° C. for 2 minutes. Dried. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (integrated light amount 400 mJ / cm ² ) and cured to form a light diffusion layer. Thereafter, an antiglare layer was formed under the same conditions so that the dry film thickness was 2.5 μm. In this way, a display surface material was produced. The obtained antiglare layer had Sm of 80 μm, Ra of 0.15 μm, Rz of 1.2 μm, 60 ° gloss of 73%, and haze value of the display surface material of 30%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 37 mN / m, and the fingerprint visibility evaluation was 4. Moreover, the visibility evaluation of the display image was 3, and the glare was 3.
(Example 5)
As a composition for forming an antiglare layer, a surface material for display was prepared in the same procedure as in Example 1 except that 5 parts by mass of crosslinked polystyrene fine particles were used and the dry film thickness was 3.5 μm. The antiglare layer had Sm of 60 μm, Ra of 0.16 μm, Rz of 1.2 μm, 60 ° gloss of 60%, and a haze value of the display surface material of 10.1%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. Then, the surface material for display was bonded to the front surface portion of a so-called WUXGA display liquid crystal display main body having a resolution of 15 inches and 160 dpi (150 μm / dot) to produce a liquid crystal display. The surface energy of the antiglare layer in this liquid crystal display was 38 mN / m, and the fingerprint visibility evaluation was 4. Moreover, the visibility evaluation of the display image was 4, and the glare was 3.
(Example 6)
As a composition for forming an antiglare layer, a surface material for display was produced in the same procedure as in Example 1 except that 20 parts by mass of crosslinked polystyrene fine particles were used and the dry film thickness was 3.5 μm. The antiglare layer had an Sm of 55 μm, an Ra of 0.17 μm, an Rz of 1.3 μm, a 60 ° gloss of 56%, and a haze value of the display surface material of 20.0%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. Then, the surface material for display was bonded to the front surface portion of a so-called WUXGA display liquid crystal display main body having a resolution of 15 inches and 160 dpi (150 μm / dot) to produce a liquid crystal display. The surface energy of the antiglare layer in this liquid crystal display was 38 mN / m, and the fingerprint visibility evaluation was 4. Moreover, the visibility evaluation of the display image was 4, and the glare was 3.
(Example 7)
A display surface material was prepared in the same manner as in Example 5 except that a film (TAC film) made of triacetate cellulose (TAC) resin having a thickness of 80 μm was used as the antiglare layer forming composition. The antiglare layer had Sm of 65 μm, Ra of 0.15 μm, Rz of 1.2 μm, 60 ° gloss of 63%, and a haze value of the display surface material of 12.0%.

Next, a pressure-sensitive adhesive layer made of an acrylic pressure-sensitive adhesive was formed on the surface of the TAC film opposite to the antiglare layer, and was bonded to the polarizing film. Then, the surface material for display was bonded to the front surface of a so-called WUXGA display liquid crystal display main body having a resolution of 15 inches and 160 dpi (150 μm / dot) to produce a liquid crystal display. The surface energy of the antiglare layer in this liquid crystal display was 37 mN / m, and the fingerprint visibility evaluation was 4. Moreover, the visibility evaluation of the display image was 4, and the glare was 3.
(Example 8)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 0.6 parts by mass Trimethylolpropane triacrylate 0.1 parts by mass Polycyclohexyl methacrylate 0.3 parts by mass 1-hydroxycyclohexyl phenyl ketone 0 0.03 parts by mass Methyl isobutyl ketone 100 parts by mass The above raw materials were mixed to form a coating layer that conforms to fingerprints. On the other hand, the coating agent was applied to a commercially available AG film (Dai Nippon Printing Co., Ltd.) by the dip coating method and dried at 70 ° C. for 60 seconds. After that, ultraviolet rays were irradiated under a nitrogen stream by a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount 400 mJ / cm ² ), and a concavo-convex layer and a coating layer having a good familiarity with fingerprints thereon were provided. A glare layer was formed. In this way, a display surface material was produced. The obtained antiglare layer had Sm of 80 μm, Ra of 0.15 μm, Rz of 1.1 μm, 60 ° gloss of 91%, and a haze value of the display surface material of 6.0%. As a result of measuring the film thickness of the coated and cured coating film on a smooth PET film under the same conditions as those applied to the concavo-convex layer with a reflective spectral film thickness meter FE-3000 manufactured by Otsuka Electronics Co., Ltd. The film thickness was 60 nm.

  Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 37 mN / m, and the fingerprint visibility evaluation was 4. Moreover, the visibility evaluation of the display image was 4, and the glare was 3.

As mentioned above, in Examples 1-8, the average space | interval of the unevenness | corrugation of the glare-proof layer surface is 20-300 micrometers, the surface energy of a glare-proof layer is 30-70 mN / m, and the haze value of the surface material for a display is 3 Since it was set to ˜50%, fingerprint visibility and display visibility could be improved. Moreover, the display surface glare can be sufficiently suppressed. In addition to the high-definition touch panel, the visibility of the high-definition liquid crystal panel could be improved sufficiently.
(Comparative Example 1)
Pentaerythritol triacrylate 50 parts by weight Dicyclopentanyl acrylate 50 parts by weight 1-hydroxycyclohexyl phenyl ketone 2 parts by weight Methyl ethyl ketone 150 parts by weight The above raw materials are mixed and dried to a 100 μm thick PET film by dip coating. Was applied to a thickness of 5 μm and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated with a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount 400 mJ / cm ² ) and cured to produce a flat film having good irregularities but not unevenness. In this way, a display surface material was produced. The flat film had Sm of 12 μm, Ra of 0.01 μm, Rz of 0.1 μm, 60 ° gloss of 135%, and haze value of the display surface material of 0.3%.

Subsequently, the adhesive layer by an acrylic adhesive was formed in the surface on the opposite side to the flat film of PET film. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The fingerprint visibility evaluation on the touch panel was 1. The visibility evaluation of the display image was 3. The surface energy of the obtained flat film was 32 mN / m, and the glaring property was 3.
(Comparative Example 2)
(Anti-glare layer forming composition)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 85 parts by mass Trimethylolpropane triacrylate 15 parts by mass Cross-linked polystyrene fine particles (SX-350H, manufactured by Soken Chemical Co., Ltd.); average particle size 3.5 μm 3 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass This antiglare layer-forming composition is formed on a PET film having a thickness of 100 μm by a roll coater so that the dry film thickness becomes 5 μm. It was applied and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount: 400 mJ / cm ² ) and cured to form a single layer of an antiglare layer that would be well-fitted with fingerprints. In this way, a display surface material was produced. Sm of this antiglare layer was 401 μm, Ra was 0.18 μm, Rz was 1.3 μm, 60 ° gloss was 101%, and the haze value of the display surface material was 7.5%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 32 mN / m, and the fingerprint visibility evaluation was 2. Further, the visibility evaluation of the display image was 2, and the glare was 1.
(Comparative Example 3)
(Anti-glare layer forming composition)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 85 parts by mass Trimethylolpropane triacrylate 15 parts by mass Perfluorooctylethyl polyacrylate 1 part by mass Cross-linked polystyrene fine particles (manufactured by Soken Chemical Co., Ltd.) SX-350H; average particle diameter 3.5 μm) 3 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass On a PET film having a thickness of 100 μm with a roll coater The film was applied to a dry film thickness of 5 μm and dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount: 400 mJ / cm ² ) and cured to form a single layer of an antiglare layer that would be well-fitted with fingerprints. In this way, a display surface material was produced. The antiglare layer had an Sm of 430 μm, an Ra of 0.22 μm, an Rz of 1.5 μm, a 60 ° gloss of 98%, and a haze value of the display surface material of 8.3%.

Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 25 mN / m, and the fingerprint visibility evaluation was 1. Further, the visibility evaluation of the display image was 2, and the glare was 1.
(Comparative Example 4)
(Anti-glare layer forming composition)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., purple light UV-7600B) 85 parts by mass Trimethylolpropane triacrylate 15 parts by mass Cross-linked polystyrene fine particles (manufactured by Soken Chemical Co., Ltd., SX-350H; average particle size 3. 5 parts by mass) 20 parts by mass 1-hydroxycyclohexyl phenyl ketone 3 parts by mass Methyl isobutyl ketone 150 parts by mass This antiglare layer-forming composition is formed on a 100 μm-thick PET film by a roll coater so that the dry film thickness becomes 5 μm. And dried at 80 ° C. for 2 minutes. Thereafter, ultraviolet rays were irradiated by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount: 400 mJ / cm ² ) and cured to form a single layer of an antiglare layer that would be well-fitted with fingerprints. In this way, a display surface material was produced. The antiglare layer had an Sm of 200 μm, an Ra of 0.45 μm, an Rz of 3.5 μm, a 60 ° gloss of 80%, and a haze value of the display surface material of 65%.

  Next, an adhesive layer made of an acrylic adhesive was formed on the surface of the PET film opposite to the antiglare layer. And the surface material for a display was bonded together to the front part of the touch-panel main body whose resolution is 7 inches and 160 dpi (150 micrometers / dot), and produced the touch panel. The surface energy of the antiglare layer in this touch panel was 32 mN / m, and the fingerprint visibility evaluation was 2. Further, the visibility evaluation of the display image was 1, and the glare was 1.

  In the above Comparative Examples 1 to 4, any one of the average spacing of the irregularities on the surface of the antiglare layer, the surface energy of the antiglare layer, and the haze value of the surface material for display was outside the scope of the present invention. At least one effect of display visibility was not obtained. Furthermore, there were many cases where glare on the display surface could not be suppressed.

It should be noted that the present embodiment can be implemented with the following modifications.
-It is also possible to comprise an anti-glare layer with several anti-glare layers according to the adjacent layer.
In Examples 1 to 8, a plurality of functional layers can be laminated so that different functions are exhibited.

The display surface material can be attached to the surface of the display using an adhesive or the like without providing an adhesive layer on the back surface of the display surface material.
-It can also be configured to improve the visibility of the display surface in consideration of oils other than lipid components such as fingerprints.

Furthermore, the technical idea grasped from the embodiment will be described below.
The surface material for high-definition displays according to any one of claims 1 to 3, wherein an average interval (Sm) of irregularities on the surface of the antiglare layer is 30 to 100 µm. When configured in this manner, the effects of the invention according to any one of claims 1 to 3 can be improved, and in particular, glare can be effectively suppressed, and a high-definition display can be achieved. Is preferred.

  The surface material for a high-definition display according to claim 2 or 3, wherein the fine particles are plastic beads. When constituted in this way, in addition to the effect of the invention according to claim 2 or claim 3, the refractive index is easily set when adjustment of the transparency of the antiglare layer and the difference in refractive index with the binder resin is necessary. be able to.

  The surface material for a high-definition display according to any one of claims 1 to 3, wherein the 60 ° gloss value representing the surface gloss of the antiglare layer is 50 to 80%. When comprised in this way, in addition to the effect of the invention which concerns on any one of Claims 1-3, anti-glare property can be improved and the reflection preventing effect can be improved.

  The high-definition display surface according to any one of claims 1 to 3, wherein an arithmetic average roughness (Ra) of the surface of the antiglare layer is 0.01 to 0.2 µm. Wood. When comprised in this way, in addition to the effect of the invention which concerns on any one of Claims 1-3, glare can be suppressed and the visibility of a display can be improved.

  The ten-point average roughness (Rz) of the surface of the antiglare layer is 0.1 to 1.5 µm, for high-definition displays according to any one of claims 1 to 3. Surface material. When comprised in this way, in addition to the effect of the invention which concerns on any one of Claims 1-3, glare can be suppressed and the visibility of a display can be improved.

  The surface material for high-definition displays according to any one of claims 1 to 3, wherein an adhesive layer is provided on the back surface of the transparent substrate. When comprised in this way, in addition to the effect of the invention which concerns on any one of Claims 1-3, the surface material for a display can be easily affixed on the surface of a display.

  The high-definition display according to any one of claims 1 to 3, wherein a coating layer having an affinity for a biological lipid component is provided on the antiglare layer. Surface material. When comprised in this way, in addition to the effect of the invention which concerns on any one of Claims 1-3, the familiarity with respect to biologically derived lipid components, such as a fingerprint, can be improved, and the visibility of a display can be improved.

Claims (5)

A display surface material used by being disposed on the surface of a display, wherein the antiglare layer is provided on a transparent substrate with an antiglare layer alone or via a functional layer. A surface material for high-definition displays, characterized in that the average distance between the surfaces is 20 to 300 μm, the surface energy is 30 to 70 mN / m, and the haze value of the display surface material is 3 to 50%. The antiglare layer is formed by dispersing fine particles in a binder resin, the fine particles have an average particle size of 0.1 to 10 μm, and the content of the fine particles is 0.5 to 30% by mass with respect to the binder resin. The surface material for a high-definition display according to claim 1, wherein: The surface material for a high-definition display according to claim 1, wherein the functional layer is a light diffusion layer. A high-definition display characterized in that the surface material for a high-definition display according to any one of claims 1 to 3 is arranged on the outermost surface of the display. A high-definition touch panel comprising the surface material for a high-definition display according to any one of claims 1 to 3 arranged on an outermost surface of the touch panel.