JP2007058162A - Surface material for display and display with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface material for a display which has an antidazzle function and a function to make a fingerprint attached to the surface inconspicuous in combination and can improve visibility, and a display with the same. <P>SOLUTION: The surface material 10 for the display is used by being arranged on the surface of the display. The surface material 10 for the display is configured by forming an irregularity layer 14 having irregularities 13 on the surface by a resin on a transparent base 11, and is set at ≤60° in the contact angle of a flat film formed of the resin with oleic acid. The resin does not preferably contain a fluorine atom or if the resin contains the fluorine atom, the content of the fluorine atom is preferably ≤0.05mass%. Preferably, the irregularities 13 on the surface of the irregularity layer 14 is 0.05 to 5 μm as the arithmetic mean roughness (Ra) stipulated in JIS B 0601-1994 and is 5 to 500 μm as the mean spacing (Sm) of the irregularities 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display surface material provided on the surface of a display such as a display for a glass case, a plastic case or the like, or an image display such as a personal computer, a television, or a mobile phone, and a display having the same.

  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). The antiglare layer having antifouling properties contains a fluorine-modified compound and has a contact angle with respect to triacetin exceeding 43 °.
JP 2000-194272 A (pages 2 and 4)

  Since the antifouling layer formed of the fluorine 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 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. However, it is still unimproved that fingerprints are conspicuous on the surface of the display because the microdroplets are easy to form. 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 display surface material that has both an anti-glare function and a function that makes fingerprints attached to the surface less noticeable and can improve visibility, and a display including the same. There is to do.

  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 that the micro-droplets are not generated even if the lipid component derived from the living body is attached, for example, the fingerprint can be made inconspicuous visually when it becomes wet. That is, based on the surface irregularities for developing anti-glare properties, the amount of adherence of living body-derived lipid components is reduced, and the substances constituting the surface in addition to the unevenness are made easier to adapt to living body-derived lipid components. The inventors have found that if the lipid component from the living body is further absorbed by capillary action, the conspicuousness of the attached fingerprint can be effectively prevented, and the present invention has been completed.

  That is, the display surface material of the first invention in the present invention is a display surface material used by being disposed on the surface of the display, and has an antiglare layer having a concavo-convex portion on the surface by a resin on a transparent substrate. And a contact angle of a flat film formed of the resin with respect to oleic acid is 60 ° or less.

The display surface material of the second invention is characterized in that, in the first invention, the resin contains a metal oxide having an average particle diameter of 1 to 200 nm.
In the first or second invention, the surface material for display of the third invention does not contain a fluorine atom in the first or second invention, or when the resin contains a fluorine atom, the fluorine atom content is 0.05. It is characterized by being not more than mass%.

  The surface material for display according to a fourth aspect of the present invention is the surface material for display according to any one of the first to third aspects, wherein the uneven portion on the surface of the antiglare layer has an arithmetic average roughness (Ra) defined in JIS B 0601-1994. It is 0.05-5 micrometers, and it is 5-500 micrometers as an average space | interval (Sm) of an uneven | corrugated | grooved part.

  The display of the fifth invention is characterized in that the display surface material of any one of the first to fourth inventions is arranged on the surface.

According to the present invention, the following effects can be exhibited.
In the surface material for display according to the first aspect of the invention, the antiglare layer having an uneven portion on the surface by the resin changes the reflection direction of the light, suppresses the reflected light that enters the eyes and exhibits antiglare properties. . Further, it is considered that the living body-derived lipid component forming a fingerprint based on the capillary phenomenon is induced to the concave portion (a kind of capillary tube) on the surface by having the uneven portion on the surface. In addition, since the contact angle of the flat film formed of the resin with respect to oleic acid is set to 60 ° or less, the resin constituting the antiglare layer is easily compatible with the biological lipid component. It is presumed that the component is promptly guided to the concave portion on the surface, and the attached fingerprint is hardly visible. Therefore, the display surface material has both an antiglare function and a function of making the fingerprint attached to the surface less noticeable, and can improve the visibility of display images and the like.

  In the surface material for display of the second invention, since the resin contains a metal oxide having an average particle diameter of 1 to 200 nm, the uneven portion on the surface of the antiglare layer becomes a fine one on the order of nanometers, and the capillary phenomenon The biological lipid component is promptly guided to the concave portion on the surface, and the attached fingerprint becomes difficult to be visually recognized. Therefore, the effect of the invention according to claim 1 can be improved.

  In the display surface material of the third invention, the fluorine atom is not contained in the resin, or when the fluorine atom is contained, the fluorine atom content is 0.05% by mass or less. It is possible to suppress the formation of fine droplets of the living body-derived lipid component due to the above, suppress the irregular reflection of light, and improve the effects of the first or second invention.

  In the surface material for display of the fourth invention, the uneven portion on the surface of the antiglare layer has an arithmetic average roughness (Ra) specified in JIS B 0601-1994 of 0.05 to 5 μm, and the average of the uneven portion. The interval (Sm) is 5 to 500 μm. For this reason, the capillary phenomenon by an uneven | corrugated | grooved part can be expressed more effectively, and the effect of the invention in any one of 1st to 3rd can be heightened.

  Since the display surface material of any one of the first to fourth inventions is arranged on the surface of the display of the fifth invention, any one of the first to fourth surface materials for the display is used. The effects of the invention can be achieved, and the functions of the display can be fully exhibited.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view schematically showing an example of a display surface material 10 of the present invention. As shown in FIG. 1, a concavo-convex layer 14 having concavo-convex portions 13 is formed on the surface of a transparent substrate 11 with a resin containing fine particles 12, and an adhesive layer 15 is provided on the back surface. The uneven layer 14 has a function as an antiglare layer due to the uneven portion 13 on the surface. In this case, the resin constituting the concavo-convex layer 14 is compatible with the biological lipid component.

  FIGS. 2A to 2C are cross-sectional views schematically showing another example of the display surface material 10 of the present invention. As shown in FIG. 2 (a), the surface material 10 for display is provided with a coating layer (fingerprint familiar layer) 16 having compatibility with a biological lipid component on the concavo-convex layer 14 in FIG. The rest of the configuration is the same as in FIG. As shown in FIG. 2 (b), the surface material 10 for display has a concavo-convex layer 14 formed by concavo-convex transfer, and the resin constituting the concavo-convex layer 14 is compatible with a biological lipid component. It is the same structure as FIG. As shown in FIG. 2 (c), the surface material 10 for display has a concavo-convex layer 14 formed by concavo-convex transfer, and on the concavo-convex layer 14, a coating layer 16 having compatibility with a biological lipid component is provided. Other configurations are the same as those in FIG. As shown in FIGS. 2A and 2C, when the coating layer 16 is provided on the uneven layer 14, the uneven layer 14 and the cover layer 16 constitute an antiglare layer.

  As the transparent substrate 11, a transparent resin sheet, a transparent resin film, a transparent glass plate or the like is used, and is not particularly limited. Specifically, the resin material for forming the transparent substrate 11 is poly (meth) acrylic resin, poly (meth) acrylonitrile resin, polystyrene resin, polysulfone resin, polyethersulfone resin, polyether resin. Resin, 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, poly Pyrene-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.

  The thickness of the transparent substrate 11 is usually 10 to 5000 μm, preferably 25 to 1000 μm, and more preferably 35 to 500 μm. When this thickness is thinner than 10 μm, the workability is poor and the strength of the transparent substrate 11 tends to decrease. On the other hand, when the thickness exceeds 5000 μm, it is meaningless because it becomes unnecessarily thick.

  As described above, the concavo-convex layer 14 has the concavo-convex portion 13 formed of a resin, and the contact angle of the flat film made of the resin with respect to oleic acid needs to be 60 ° or less, preferably 50 ° or less, More preferably, it is 1 to 40 °. The concavo-convex layer 14 may have a concavo-convex part 13 on the surface as described above, and may have a good conformability with a biological lipid component, and has a concavo-convex part 13 on the surface. The form which provided the coating layer 16 favorable with a biologically derived lipid component on top may be sufficient. When the contact angle is 60 ° or less, the resin constituting the concavo-convex layer 14 is easily adapted to the biological lipid component, and the biological lipid component quickly enters the concave layer 13a on the surface of the concavo-convex layer 14 or the coating layer 16. It is presumed that a function that makes it difficult for the attached fingerprint to be visually recognized can be expressed. When the contact angle exceeds 60 °, the lipid component derived from the living body is easily formed into microdroplets, and the light is irregularly reflected, and the visibility of a display image or the like is deteriorated, which is inappropriate.

  Moreover, regarding the uneven | corrugated | grooved part 13 of the said surface, 0.05-5 micrometers is preferable as arithmetic mean roughness (Ra) prescribed | regulated to JISB0601-1994, and 5-500 micrometers is preferable as an average space | interval (Sm) of the uneven | corrugated part 13. preferable. This Ra is more preferably 0.05 to 2 μm, Sm is more preferably 5 to 500 μm, Ra is particularly preferably 0.1 to 0.7 μm, and Sm is 5 to 350 μm. It is particularly preferred. When Ra is less than 0.05 μm or Sm exceeds 500 μm, the uneven portion 13 becomes too small or the interval becomes too wide, so that the antiglare property is insufficient and a capillary phenomenon that absorbs a lipid component derived from a living body. There is a tendency for the effect to decrease and the anti-adherent fingerprint conspicuous prevention function to decrease. On the other hand, if Ra exceeds 5 μm or Sm is less than 5 μm, the concavo-convex portion 13 becomes too large or the interval thereof becomes too narrow, which is not preferable because the haze value tends to increase.

  The surface material 10 for display is a desired functional layer, for example, an adhesive layer, an ultraviolet absorption layer, an infrared absorption layer, a reflection, between the back surface of the transparent substrate 11 and the transparent substrate 11 and the uneven layer 14 as necessary. Each layer such as a prevention layer, a soft (impact resistant) layer, a hard coat layer, a conductive layer, an antistatic layer, a heat insulating layer, a reflective layer, and a primer layer can be provided as a single layer or a plurality of layers.

  In addition, when the antiglare layer is composed of the uneven layer 14 and the covering layer 16 having a good fit with the fingerprint thereon, the covering layer 16 holds the uneven portion 13 to the extent that the intended function of the present invention is maintained. It is also possible to provide a desired functional layer as a single layer or a plurality of layers between the concavo-convex layer 14 and the covering layer 16 as necessary, provided that Examples of such a layer include an ultraviolet absorbing layer, an infrared absorbing layer, a soft (impact resistant) layer, a hard coat layer, a conductive layer, an antistatic layer, a heat insulating layer, a reflective layer, and a primer layer.

  Next, the coating layer 16 will be described for convenience of description. The coating layer 16 is a fingerprint familiar layer that has a good familiarity (affinity) with the fingerprint because the fingerprint mainly includes an oil component. A contact angle with respect to oleic acid in the flat film of the resin is adopted as an index of good compatibility with fingerprints. This contact angle is required to be 60 ° or less for this function expression, preferably 50 ° or less, and more preferably 1 to 40 °. When the contact angle exceeds 60 °, the biological lipid component tends to form microdroplets on the display surface material 10, and it becomes difficult to absorb the biological lipid component based on the capillary phenomenon by the uneven portion 13 on the surface. Any resin can be used without particular limitation as long as the material has 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 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. Incidentally, the contact angle of the surface of the coating layer 16 in this embodiment is 43 ° or less as the contact angle with respect to triacetin.

  When an active energy ray-curable resin is used as a 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 includes a monofunctional monomer, a polyfunctional monomer, an oligomer having a vinyl group or a (meth) acryloyl group (hereinafter referred to as a polymerizable oligomer), and a heavy group having a vinyl group or a (meth) acryloyl group. One type or two or more types are selected and used from a combination (hereinafter referred to as a polymerizable polymer). 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. It may be added.

  The coating layer 16 is not particularly limited as long as the contact angle of the flat film to oleic acid is 60 ° or less. The contact angle of 60 ° or less can be controlled by, for example, the type and amount of monofunctional monomer or metal oxide. 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 “each oligomer or each polymer” and a combination of a monofunctional monomer and a polyfunctional monomer without using a metal oxide, the amount of the monofunctional monomer is such that the contact angle of the flat film with respect to oleic acid is There is no particular limitation as long as it is possible to form a resin that is 60 ° or less. When only the monofunctional monomer is an active ingredient for achieving the contact angle of 60 ° or less, the amount of the monofunctional monomer is usually 10% by mass or more, preferably 30% in the polymerizable component. % 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 16 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.

  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, it is not preferable because the film obtained from the coating agent is not completely cured and the curing becomes insufficient. On the other hand, if it exceeds 20% 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 contact angle of 60 ° or less is used. However, in the total amount of the monofunctional monomer, polyfunctional monomer, and “each oligomer or each polymer”, it is usually 10% by mass or more, preferably 30% by mass or more, more preferably 50% by mass or more, Most preferably, it is 75 mass% or more. When this ratio is less than 30% by mass, the coating layer 16 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 1 to 80 parts by mass with respect to 100 parts by mass of the polymerizable component. When the added amount is 1 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 coating agent, the coating agent component does not contain a polymer obtained by polymerizing a monofunctional monomer used in the case of the active energy ray-curable resin, and an acrylic functional group. A polymer is essential, and a surfactant, a diluent solvent, a stabilizer, an ultraviolet absorber, an infrared absorber, an antioxidant, and the like may be added as necessary.

  As the monofunctional monomer, all known monofunctional monomers can be used as long as the condition that the contact angle of the flat film formed from the resin obtained from the monofunctional monomer for oleic acid is 60 ° or less is satisfied. However, as the monofunctional monomer effective for lowering the contact angle with oleic acid, for example, the following monofunctional monomers are preferable. That is, (meth) acrylic acid ester, itaconic acid ester, and fumaric acid ester are 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.

  Specifically, the following monofunctional monomers can be exemplified. That is, monofunctional monomers include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, ( Isobutyl acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, (meth) acrylic acid Cetyl, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, tricyclodecyl (meth) acrylate, benzyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, dicyclopentenyloxy (meth) acrylate Ethyl, (meth) acrylic acid dicyclopentanyl, (meth) acrylic acid N-methylpiperidyl, ethyl (meth) acrylate hexahydrophthalate, ethyl (meth) acrylate 2-hydroxypropyl phthalate, 2-hydroxybutyl (meth) acrylate, butoxyethyl (meth) acrylate, (meth) acryl (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 contains pyrrolidone Yes.

  The lower the contact angle with respect to oleic acid, the more effectively it is possible to prevent the attached fingerprint from being noticeable. Therefore, it is more preferable to contain 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 coating layer 16 tends to be inferior in familiarity with the biological lipid component.

  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 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 having a vinyl group or (meth) acryloyl group include an oligomer obtained by adding a vinyl group or (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 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. It is more preferable to select a segmented copolymer such as a copolymer 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 thioxanthone. Specifically, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-methyl-1- [4- (methylthio) phenyl ] -2-Morferinopropan-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- (methylphenol Nylthio) phenyl] phenylmethanone, 4-hydroxybenzophenone, 4-phenylbenzophenone, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone, 2-chlorothioxanthone, 2,4-diethylthioxanthone , Α-amyloxime ester, Michler benzoylbenzoate, tetramethylchuram monosulfide and the like.

  The surfactant is used for the purpose of compatibilization when various raw materials are blended and for the purpose of improving the smoothness of the coating. Such a surfactant is not particularly limited, but an acrylic copolymer (ionic or nonionic) is used to maintain the contact angle of a flat film formed of a resin for oleic acid at 60 ° or less. ), A methacrylic copolymer, a leveling agent for solvent-based paints, and the like are preferably used.

  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 coating agent is usually 0.01 to 10 parts by mass and preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the coating agent solid content. When the blending ratio exceeds 10 parts by mass, the amount is more than necessary to express compatibilization or smoothness of the coating, which is meaningless. On the other hand, when the amount is less than 0.01 parts by mass, a sufficient effect tends not to be obtained, which is not preferable.

  Polysiloxane compounds can also be used as surfactants, but depending on the amount and type of addition, the contact angle of the flat film may exceed 60 °, so the amount of addition must be adjusted accordingly. .

  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 dilution solvent is not particularly limited as long as it is non-polymerizable and is used for adjusting the viscosity of the coating liquid when a coating agent made of an active energy ray-curable resin or a thermoplastic resin is applied. 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, Examples include hexane, heptane, octane, decane, dodecane, propylene glycol monomethyl ether, and 3-methoxybutanol.

  As the photosensitizer, a known compound for the polymerization initiator is used, and examples thereof include tributylamine, triethylamine, polyethyleneimine, poly-n-butylphosphine, p-dimethylaminobenzoic acid ethyl ester, p-dimethyl. And tertiary amines such as aminobenzoic 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%, the fluorine atoms become a low surface free energy component, and the biological lipid component tends to form fine droplets on the outermost surface of the display surface material 10. This is not preferable because the attached fingerprint is easily noticeable and the visibility of the display image 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, considering 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 attached fingerprint is less noticeable. When the average particle diameter is less than 1 nm, the unevenness on the surface of the film tends to be too small and the capillary phenomenon tends not to be sufficiently expressed, and fingerprints due to biological lipid components adhering to the surface of the film 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.

  When the metal oxide is contained in the coating agent, it is used in the form of an organic sol previously dispersed in an organic dispersion medium in order not to lower the dispersion stability in the coating agent, the adhesion with the binder resin, or the like. Is desirable. Furthermore, in the composition, in order to improve the dispersion stability of the metal oxide fine particles, the adhesion in the binder resin, etc., the surface of the metal oxide fine particles may be modified in advance using various coupling agents. it can. 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 preferably 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 proportion 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 for the coating agent, there is no particular limitation as long as the resin can form a resin having a flat film contact angle with respect to oleic acid of 60 ° or less. It is usually composed mainly 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 coating agent, there is no particular limitation as long as the contact angle of the flat film with respect to oleic acid is 60 ° or less. For example, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin, silicon resin, polysiloxane resin, and 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 coating agent for forming the coating layer 16 on the uneven layer 14, 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, and a die coating method. Any known method such as a gravure coating method, a curtain flow coating method, a reverse coating method, a kiss coating method, or a comma coating method may be used. At the time of application, some pretreatment such as corona discharge may be performed in advance in order to improve interlayer adhesion as necessary.

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 coating agent 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.

  Next, the uneven layer 14 will be described. The uneven layer 14 is formed using a transparent resin as a constituent component. As the transparent resin, a conventional resin can be used and is not particularly limited. For example, an active energy ray curable resin, a thermosetting resin, a thermoplastic resin, or the like can be used, and is generally used as a coating agent. It is. 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.

  As a component constituting the coating agent for the active energy ray-curable resin, a polymerizable component is essential. As the polymerizable component, one or two or more kinds selected from a monofunctional monomer, a polyfunctional monomer, a polymerizable oligomer, and a polymerizable polymer are used. In addition, if necessary, a polymerization initiator, a non-polymerizable oligomer, a non-polymerizable polymer, a surfactant, a diluting solvent, fine particles 12 for providing the uneven portion 13, an anti-settling agent, a photosensitizer, a stabilizer, An ultraviolet absorber, an infrared absorber, an antioxidant and the like are added.

  A known monofunctional monomer can be used as the monofunctional monomer. However, in order for the antiglare layer to be a single layer of the concavo-convex layer 14 and to be well-fitted with the biological lipid component, the idea of making the concavo-convex layer 14 to be familiar with the biological lipid component in the coating layer 16 is applied. There is a need to. That is, as the monofunctional monomer for forming the uneven layer 14, monomers as described for the coating layer 16 can be used, and the same applies to preferable monomers and composition ratios. As the polyfunctional monomer, monomers described in the coating layer 16 can be used, and the same applies to preferable monomers. For each “oligomer or each polymer”, “each oligomer or each polymer” as described for the coating layer 16 can be used, and the same applies to the preferred “each oligomer or each polymer” and its addition ratio. is there. Further, as the metal oxide, the metal oxide as described for the coating layer 16 can be used, and the same applies to the preferred metal oxide and its addition ratio.

  The component constituting the thermoplastic resin coating agent must be 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. is there. In addition, a surfactant, a diluting solvent, fine particles 12 for providing the uneven portion 13, an anti-settling agent, a stabilizer, an ultraviolet absorber, an infrared absorber, an antioxidant, and the like may be added as necessary.

  A known monofunctional monomer can be used as the monofunctional monomer. However, in order for the antiglare layer to be a single layer of the concavo-convex layer 14 and to have good familiarity with a biological lipid component, it is necessary to apply the concept of the coating layer 16 to the monofunctional monomer constituting the concavo-convex layer 14. is there. That is, as the monofunctional monomer for forming the uneven layer 14, any known monofunctional monomer can be used as long as the contact angle of a flat film formed of a resin obtained from the monofunctional monomer with respect to oleic acid is 60 ° or less. All mers can be used. Among them, it is preferable to include a monofunctional monomer that is effective in reducing the contact angle with respect to oleic acid described in the coating layer 16, and it is more preferable to include a more preferable monofunctional monomer. . 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. If this ratio is less than 30% by mass, the familiarity with the biological lipid component tends to be inferior. As the polyfunctional monomer, monomers described in the coating layer 16 can be used, and the same applies to preferable monomers.

  For each “oligomer or polymer”, each oligomer and polymer as described in the coating layer 16 can be used. 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-compatible resin that forms an adjacent layer. 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.

  As the polymerization initiator, the polymerization initiator as described in the coating layer 16 can be used, and the blending ratio in the active energy ray-curable resin is the same as that of the coating layer 16. As the photosensitizer, a photosensitizer as described in the coating layer 16 can be used. The surfactant is used for the purpose of compatibilization when various raw materials are blended and for the purpose of improving the smoothness of the coating, and the type thereof is not particularly limited, and is as described in the coating layer 16. A surfactant can be used. The dilution solvent is not particularly limited as long as it is a non-polymerizable one used to adjust the viscosity of the coating liquid in applying a coating agent comprising an active energy ray-curable resin or a thermoplastic resin. Dilution solvents as described for the coating layer 16 can be used.

  In the case where the antiglare layer is a single layer of the concave / convex layer 14 and has good composition with the fingerprint, the fluorine atom content in the concave / convex layer 14 is 0.05% by mass or less as in the case of the coating layer 16. Preferably, it is 0.01% or less, and most preferably it is not contained at all.

  As a method of applying the coating agent made of the active energy ray-curable resin or the thermoplastic resin on the transparent substrate 11, a coating method as described in the coating layer 16 can be adopted. May be subjected to some pretreatment such as corona discharge in advance in order to improve interlayer adhesion as required. The active energy ray source as described in the coating layer 16 can be used for the active energy ray source used for curing the active energy ray curable resin, and the irradiation amount is the same.

  A method for forming the uneven portion 13 on the surface of the uneven layer 14 is performed according to a conventional method, and the method is not particularly limited. For example, a method by adding fine particles 12 or pressing of an original plate that is a negative image having a desired uneven shape Examples thereof include a mark, that 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.

  First, in the method using the addition of fine particles 12, inorganic particles and plastic beads can be cited as the fine particles 12, but the viewpoint that a desired refractive index can be selected when adjustment of the refractive index difference with transparency or a transparent resin is required. Then, plastic beads are preferable. 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, and polycarbonate resin. Moreover, the average particle diameter of these fine particles 12 is preferably 0.1 to 10 μm, more preferably 0.5 to 5 μm. If this 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.

  Moreover, as a compounding quantity added to the transparent resin of the microparticles | fine-particles 12, it is 0.1-40 mass% normally with respect to a transparent resin, Preferably it is 0.5-30 mass%, More preferably, it is 1-20 mass%, Most preferably Is 1 to 15% by mass. When the blending amount is less than 0.1% by mass, sufficient antiglare property cannot be obtained, and it becomes difficult to form sufficient uneven portions 13 sufficient to develop a capillary phenomenon so as to absorb living body-derived lipid components. If the amount exceeds 40% by mass, the haze value becomes too high, which is not preferable.

  Subsequently, in the method of forming the concavo-convex layer 14 by concavo-convex transfer, it can be produced using, for example, a transparent resin or a composition to which the fine particles 12 are added. Specifically, in the case of an active energy ray curable resin, a coating agent of the resin is applied, and if necessary, precuring is performed with active energy rays to a degree of flexibility or thermoplasticity that allows uneven transfer. Then, it can be produced by imprinting with an original plate and removing the original plate or irradiating and curing the active energy ray in the same state without removing the original plate. In addition, you may heat as needed at the time of stamping. Moreover, in the case of a thermoplastic resin, uneven | corrugated transcription | transfer can be performed by applying the coating agent which forms the resin, and drying and then imprinting the film at the temperature more than a softening point. 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.

  Although the thickness of the said uneven | corrugated layer 14 should just be more than the height difference of the uneven | corrugated | grooved part 13 desired, it is 0.1-1000 micrometers normally, Preferably it is 0.1-200 micrometers, More preferably, it is 0.1-100 micrometers. If this thickness is less than 0.1 μm, it becomes difficult to form the desired uneven portion 13, and if it exceeds 1000 μm, it is meaningless because it becomes unnecessarily thick.

  As described above, one or more functional layers can be provided between the transparent substrate 11 and the uneven layer 14. This 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. The method for forming the functional layer is not particularly limited, and a dry coating method or a wet coating method can be used. Functions include improved hardness, improved scratch resistance, improved antiglare properties, prevention of formation of Newton rings (concentric light and darkness), improved adhesion, light blocking at a specific wavelength, improved conductivity, chargeability Prevention, ultraviolet absorption, infrared absorption, improvement in impact resistance, improvement in heat insulation, improvement in reflectivity, and the like. The method for imparting the function is not particularly limited, and a conventionally known method is employed. 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 the scratch resistance, there are a method of increasing the hardness of the layer between the transparent substrate 11 and the concavo-convex layer 14 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, organic substances, inorganic substances, and mixtures thereof can be used. In particular, in order to increase the hardness (for example, for a hard coat layer), it is preferable to include a crosslinkable curable monomer. As the curable monomer, those that are cured in a short time by heating or irradiation with active energy rays such as ultraviolet rays and electron beams are preferable. 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. As the inorganic substance, silica gel ultrafine particles and the like can be used.

  Next, the pressure-sensitive adhesive layer 15 provided on the back surface of the display surface material 10 is for attaching the display surface material 10 to the surface of the display. Examples of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 15 include acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. In terms of transparency, acrylic pressure-sensitive adhesives are preferable, and removability is also possible. 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 that is the main component of the acrylic adhesive, there is a copolymer of a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 10 carbon atoms and a functional group-containing unsaturated monomer. 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, styrene-butadiene random copolymer, styrene-isoprene block copolymer, natural rubber and the like are preferable. The thickness of the pressure-sensitive adhesive layer 15 is preferably 5 to 100 μm.

  It is effective to provide the display surface material 10 on the outermost surface of the display main body that may be touched by a hand and the surface of the display surface material 10 may be soiled by fingerprints. Specifically, glass cases and plastic cases such as show cases and show windows used for display for display can be mentioned. In addition, a touch panel as a display 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. Surface (CRT, plasma display, liquid crystal display, electroluminescence display, field emission display, projection display, toner-based display used for electronic paper, etc.).

  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.

  FIG. 3A is a cross-sectional view showing a resistive film type touch panel 20. As shown in the figure, the base materials 23 and 24 made of a transparent resin sheet on the fixed side (lower side in the figure) and movable side (upper side in the figure) provided with the transparent conductive thin films 21 and 22 on one side are transparent conductive. It arrange | positions so that the property thin films 21 and 22 may oppose, and the circumference | surroundings are adhere | attached with the reinforcing material 25 for adhesion | attachment, and it is comprised so that a fixed space | interval can be hold | maintained. On one transparent conductive thin film 21, a large number of insulating spacers 26 are scattered like dots, and the transparent conductive thin films 21 and 22 facing each other are insulated. A touch panel body is constituted by the base materials 23 and 24, the transparent conductive thin films 21 and 22, the insulating spacer 26, and the like. The display surface material 10 is provided on the movable base 24. Alternatively, as shown in FIG. 3B, the surface material 10 for display 10 in which the transparent base material 11 is bonded to the surface of the base material 24 on the movable side by the pressure-sensitive adhesive layer 15 and the uneven layer 14 is formed thereon. Is provided. Then, by pressing the display surface material 10 with a finger 27, the movable transparent conductive thin film 22 is brought into contact with the fixed transparent conductive thin film 21 to be electrically connected to allow input. .

  The electromagnetic induction type touch panel 20 is configured as shown in the sectional view of FIG. That is, the display surface material 10 is laminated and adhered to the surface of the base material 24 made of transparent resin, and a pen position detector 28 in which a receiving circuit is stretched around a liquid crystal element (LCD) is provided on the back surface of the base material 24. It is provided and configured. The display surface material 10 is configured such that an uneven layer 14 is provided on the surface of a transparent substrate 11 made of a transparent resin sheet, and an adhesive layer 15 is provided on the back surface. Further, an electromagnetic input pen 29 having a transmission coil (not shown) is provided. Then, by pressing the display surface material 10 with the input pen 29, the electromagnetic wave generated by electromagnetic induction is detected by the pen position detector 28, and the input position is recorded.

  Now, the operation of the present embodiment will be described. The display surface material 10 is composed of a transparent substrate 11 and an uneven layer 14 having an uneven portion 13 on the surface thereof by a resin. When the display surface material 10 is used by being disposed on the surface of a resistive film type touch panel 20 as a display, the touch panel 20 is operated by pressing the surface of the display surface material 10 with a finger 27. At this time, a biological lipid component that forms a fingerprint adheres to the surface of the display surface material 10, and the image visibility of the touch panel 20 decreases. Further, when the touch panel 20 is an electromagnetic induction type, it is operated by the input pen 29 and not by touching the finger 27. However, when the input pen 29 is operated, the palm touches the display surface and the biological lipid In some cases, a component adheres or a biological lipid component adheres by touching the display screen with a fingertip even if it is not an operation. In that case, the image visibility of the touch panel 20 is similarly lowered.

  However, since the concavo-convex layer 14 is configured to have the concavo-convex portion 13 on the surface by the resin, the reflection direction of the light incident on the surface changes at the concavo-convex portion 13 and is diffused and the reflected light entering the eyes is suppressed. , Dazzling is reduced. In addition, capillary action is expressed by the uneven portion 13 on the surface, and the biological lipid component forming the fingerprint is guided to the concave portion 13a on the surface. Furthermore, since the contact angle of the flat film formed of the resin constituting the concavo-convex layer 14 with respect to oleic acid is set to 60 ° or less, the resin is easily adapted to the biological lipid component, and the biological lipid component Is promptly guided to the concave portion 13a on the surface, the fingerprint is not visually recognized, and the visibility of the image on the touch panel 20 can be improved.

The effects exhibited by the above embodiment will be described collectively below.
In the display surface material 10 of the present embodiment, the reflected light is diffused by the concavo-convex layer 14 having the concavo-convex portion 13 on the surface by the resin, and the antiglare property is exhibited. Furthermore, the living body-derived lipid component which forms a fingerprint based on a capillary phenomenon is induced | guided | derived to the recessed part 13a of the surface by having the uneven | corrugated | grooved part 13 on the surface. In addition, since the contact angle of the flat film formed of the resin constituting the surface of oleic acid is set to 60 ° or less, the resin constituting the concavo-convex layer 14 is easily compatible with the biological lipid component, The biological lipid component is promptly guided to the concave portion 13a on the surface, and the attached fingerprint is difficult to be visually recognized. Therefore, the display surface material 10 has both an anti-glare function and a function that makes fingerprints attached to the surface less noticeable, and can improve the visibility of images and the like on the display.

  -Furthermore, it is presumed that the inclusion of a metal oxide having an average particle diameter of 1 to 200 nm in the resin makes the uneven portions 13 on the surface of the antiglare layer finer on the order of nanometers and promotes the capillary phenomenon. Thus, the lipid component derived from the living body is promptly guided to the concave portion on the surface of the antiglare layer, and the attached fingerprint is difficult to be visually recognized.

  -The resin does not contain a fluorine atom, or if it contains a fluorine atom, the content of the fluorine atom is 0.05% by mass or less, so that a fine droplet of a biological lipid component due to the fluorine atom Can be suppressed, and irregular reflection of light can be suppressed.

  -The uneven | corrugated | grooved part 13 of the said uneven | corrugated layer 14 is 0.05-5 micrometers as arithmetic mean roughness (Ra) prescribed | regulated to JISB0601-1994, and is 5-5 as an average space | interval (Sm) of the uneven | corrugated part 13. By being 500 micrometers, the capillary phenomenon by the uneven | corrugated | grooved part 13 can be expressed more effectively. In such a surface state of the concavo-convex portion 13, the haze value is relatively small, and the fingerprint attached to the surface is a conspicuous region, so that the effect of preventing the conspicuous fingerprint can be effectively exhibited.

  -The display surface material 10 as described above is arranged on the surface of the display to constitute the display, whereby the display surface material 10 can exhibit the above-described effects and sufficiently exhibit the display function. Can do.

  Hereinafter, the embodiment will be described more specifically with reference to examples and comparative examples. The fingerprint visibility, surface roughness, contact angle and haze value in each example were measured by the methods shown below.

1) Fingerprint visibility A fingerprint was attached on the surface material 10 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 Surface roughness measuring machine manufactured by Kosaka Laboratory Co., Ltd. Based on JIS B 0601-1994, using a surf coder SE4000 with a scanning range of 1.5 mm and a scanning speed of 0.1 mm / s. Ra and Sm were measured.

3) Contact angle Using DropMaster500 manufactured by Kyowa Interface Science Co., Ltd., the contact angle was measured with 4 μl droplets.

4) Haze value A haze value (%) as an optical characteristic was measured using a direct reading haze meter (trade name: direct reading haze meter (No. 206) manufactured by Toyo Seiki Seisakusho Co., Ltd.).

5) Visibility evaluation of display image The surface material 10 for display was mounted | worn on the display, and the sensory evaluation by visual observation was performed in the following four steps about the visibility of a display image.

4: Vivid and good visibility is obtained. 3: Slight clarity is lacking but visibility is present. 2: Slight visibility is lacking. 1: Image identification is difficult.
(Production Example 1)
Colloidal silica (manufactured by Nissan Chemical Industries, Ltd., trade name: IPA-ST-L, 30% solution of 2-propanol, average particle size 40-50 nm), 500 parts, γ-acryloyloxypropyltrimethoxysilane [Shin-Etsu Chemical Industry Co., Ltd., trade name: KBM5103] 30 parts and distilled water 40 parts were mixed to obtain a coating solution for modified colloidal silica. Thereafter, the mixture was heated to reflux (reaction temperature: 80 ° C.) for 4 hours to conduct a hydrolysis reaction and a condensation reaction. By this operation, modified colloidal silica (2-propanol 30% solution, average particle size 55 nm) was obtained.
(Production Example 2)
Colloidal silica, manufactured by Nissan Chemical Industries, Ltd., trade name: XBA-ST, 30% solution of a mixed solution of xylene and n-butanol, reaction according to Production Example 1 except that an average particle size of 10-15 nm is used Then, modified colloidal silica (30% solution of a mixed solution of xylene and n-butanol, average particle diameter of 20 nm) was obtained.
Example 1
Pentaerythritol triacrylate 50 parts by mass Dicyclopentanyl acrylate 50 parts by mass Silica filler (average particle size 1 μm) 8 parts by mass 1-hydroxycyclohexyl phenyl ketone 2 parts by mass Methyl ethyl ketone 150 parts by mass The coating agent forms a concavo-convex layer 14 (a contact angle with respect to oleic acid of a flat film made of a resin layer constituting the layer is 60 ° or less). This coating agent was applied on a 100 μm-thick PET film as a transparent substrate 11 with a roll coater so that the dry film thickness was 3 μm, and dried at 70 ° C. for 60 seconds. 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 concavo-convex layer 14 having a single layer and good compatibility with fingerprints. Ra of the uneven layer 14 was 0.33 μm, Sm was 150 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 33 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation of this touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent obtained by removing the silica filler from the coating agent was applied on a PET film, dried, and then irradiated with ultraviolet rays to form a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 30 °.
(Example 2)
Pentaerythritol triacrylate 30 parts by weight Phenoxyethyl acrylate 35 parts by weight Polymethyl methacrylate 35 parts by weight Silica filler (average particle size 1 μm) 7 parts by weight 1-hydroxycyclohexyl phenyl ketone 2 parts by weight Methyl ethyl ketone 150 parts by weight Thus, a coating agent for forming a concavo-convex layer 14 (a contact angle with respect to oleic acid of a flat film made of a resin layer constituting the layer) of which a single layer has good conformity with a fingerprint was obtained. This coating agent was applied on a PET film having a thickness of 100 μm by a roll coater so as to have a dry film thickness of 3 μm, and dried at 70 ° C. for 60 seconds. 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 concavo-convex layer 14 having a single layer and good compatibility with fingerprints. Ra of this uneven | corrugated layer 14 was 0.30 micrometer, Sm was 130 micrometers, and the haze value of this film was 8%. The contact angle with respect to triacetin was 30 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent obtained by removing the silica filler from the coating agent was coated on a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 25 °.
(Example 3)
Hexafunctional urethane acrylate (purchased UV-7600B, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 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-hydroxy Cyclohexyl phenyl ketone 3 parts by weight Methyl isobutyl ketone 150 parts by weight The above-mentioned raw material is mixed to form a concavo-convex layer 14 (a flat film oleic acid formed from a resin constituting the concavo-convex layer 14). The contact angle with respect to the coating agent is 60 ° or less. This coating agent was applied on a PET film having a thickness of 100 μm by a roll coater so that the dry film thickness was 3 μm, and dried at 80 ° C. for 60 seconds. Then, a 120W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) is irradiated with ultraviolet rays under a nitrogen stream (integrated light quantity 200 mJ / cm ² ) and cured to form a concavo-convex layer 14 that is a single layer and has good familiarity with fingerprints. did. Ra of this uneven | corrugated layer 14 was 0.30 micrometer, Sm was 130 micrometers, and the haze value of this film was 8%. The contact angle with respect to triacetin was 17 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 14 °.
Example 4
A display surface material 10 is produced in the same manner as in Example 3 except that cross-linked PMMA fine particles (manufactured by Soken Chemical Co., Ltd .; MX-300; average particle size of 3 μm) are used as metal oxide fine particles instead of silica filler. did. Ra of the uneven layer 14 was 0.35 μm, Sm was 150 μm, and the haze value of this film was 6%. The contact angle with respect to triacetin was 17 °.

The fingerprint visibility of the display surface material 10 was 3. The visibility evaluation of the display image was 3.
Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 12 °.
(Example 5)
A display surface material 10 was produced in the same manner as in Example 3 except that a TAC film was used instead of the PET film as a substrate. Ra of the uneven layer 14 was 0.33 μm, Sm was 140 μm, and the haze value of this film was 7%. The contact angle with respect to triacetin was 18 °.

The fingerprint visibility of the display surface material 10 was 3. The visibility evaluation of the display image was 3.
Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 13 °.
(Example 6)
Polymethylmethacrylate 100 parts by weight Silica filler (average particle size 1 μm) 7 parts by weight Methyl ethyl ketone 150 parts by weight The above-mentioned raw material is mixed to form a concavo-convex layer 14 (a resin layer constituting the layer) that has a good compatibility with fingerprints. The contact angle with respect to oleic acid of the flat film made of is a coating agent that forms 60 ° or less. This coating agent was applied on a 100 μm-thick PET film with a roll coater so that the dry film thickness was 3 μm, and dried at 70 ° C. for 60 seconds. Then, it was further dried at 80 ° C. for 30 minutes to form a concavo-convex layer 14 having a single layer and good compatibility with fingerprints. 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 respect to triacetin was 18 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 4. The visibility evaluation of the display image was 3.

Next, the coating agent obtained by removing the silica filler from the coating agent was applied and dried on a PET film to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 15 °.
(Example 7)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., Purple UV-7600B) 0.50 parts by mass Dicyclopentanyl acrylate 0.50 parts by mass 1-hydroxycyclohexyl phenyl ketone 0.03 parts by mass Methyl isobutyl ketone 100 parts by mass Part The above-mentioned raw materials were mixed to form a coating agent that forms the coating layer 16 that is compatible with 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. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light quantity 400 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.33 μm, Sm was 210 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 31 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent was coated on the PET film from the coating agent, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 29 °.
(Example 8)
Pentaerythritol triacrylate 1.50 parts by weight Phenoxyethyl acrylate 1.75 parts by weight Polymethyl methacrylate 1.75 parts by weight 1-hydroxycyclohexyl phenyl ketone 0.10 parts by weight Methyl ethyl ketone 100 parts by weight A coating agent for forming the coating layer 16 to be adapted was used. On the other hand, the coating agent was applied to a commercially available AG film (Sanwa Supply Co., Ltd., LCD protective film LCD-190) by the dip coating method, and dried at 70 ° C. for 60 seconds. 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 the antiglare layer 14 and the coating layer 16 having good familiarity with fingerprints thereon were provided. A layer was formed. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 30 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 26 °.
Example 9
Hexafunctional urethane acrylate (Nihon Synthetic Chemical Industry Co., Ltd., Murasakiko UV-7600B) 0.60 parts by mass Trimethylolpropane triacrylate 0.10 parts by mass Polymethyl methacrylate 0.30 parts by mass 1-hydroxycyclohexyl phenyl ketone 03 parts by mass Methyl isobutyl ketone 100 parts by mass The above-mentioned raw materials were mixed to form a coating agent that forms the coating layer 16 that is compatible with 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. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount 200 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.33 μm, Sm was 170 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 17 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. The visibility evaluation of the display image was 3.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 15 °.
(Example 10)
Hexafunctional urethane acrylate (Nihon Synthetic Chemical Industry Co., Ltd., Murasakiko UV-7600B) 0.60 parts by mass Trimethylolpropane triacrylate 0.10 parts by mass Polymethyl methacrylate 0.30 parts by mass 1-hydroxycyclohexyl phenyl ketone 03 parts by mass Surface conditioner (BYK-361 manufactured by BYK-Chemie Co., Ltd.) 0.02 parts by mass Methyl isobutyl ketone 100 parts by mass The above raw materials were mixed to form a coating layer 16 that is compatible with 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. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount 200 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.30 μm, Sm was 175 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 20 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. The visibility evaluation of the display image was 3.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 18 °.
(Example 11)
Polystyrene 5 parts by mass Toluene 100 parts by mass The raw material was mixed to form a coating layer 16. On the other hand, the coating agent was applied to a commercially available AG film (Sanwa Supply Co., Ltd., LCD protective film LCD-190) by the dip coating method, and dried at 70 ° C. for 60 seconds. Thereafter, it was further dried at 80 ° C. for 30 minutes to form an antiglare layer in which the uneven layer 14 and the coating layer 16 having good conformity with the fingerprint were provided thereon. Ra of the antiglare layer was 0.32 μm, Sm was 230 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 35 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. The visibility evaluation of the display image was 3.

Next, the coating agent was applied and dried on a PET film to form a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 15 °.
(Example 12)
Pentaerythritol triacrylate 30 parts by weight Cyclohexyl acrylate 35 parts by weight Polymethyl methacrylate 35 parts by weight 1-hydroxycyclohexyl phenyl ketone 2 parts by weight Methyl ethyl ketone 150 parts by weight Mixing the above raw materials makes the blending with the fingerprint good in a single layer A coating agent for forming the concavo-convex layer 14 (the contact angle of the flat film composed of the resin layer constituting the layer with respect to oleic acid is 60 ° or less) was used. This coating agent was applied on a 100 μm-thick PET film with a roll coater so as to have a dry film thickness of 20 μm, and dried at 70 ° C. for 60 seconds. After that, a commercially available AG film (manufactured by Sanwa Supply Co., Ltd., LCD protective film LCD-190) was bonded so that the coated surface and the AG surface were in contact with each other, and then ultraviolet light was applied with a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.). After being cured by irradiation (cumulative light intensity 400 mJ / cm ² ), the commercially available AG film (Sanwa Supply Co., Ltd., LCD protective film LCD-190) is peeled off, so that the single layer has good compatibility with fingerprints. An uneven layer 14 was formed. Ra of the concavo-convex layer 14 was 0.37 μm, Sm was 300 μm, and the haze value of this film was 12%. The contact angle with respect to triacetin was 31 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 3. The visibility evaluation of the display image was 3.

Next, the coating agent was coated on the PET film from the coating agent, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 25 °.
(Example 13)
Polybutyl t-butyl methacrylate 5 parts by weight Methyl ethyl ketone 100 parts by weight The above raw materials were mixed to form a coating agent 16. On the other hand, the coating agent was applied to a commercially available AG film (manufactured by Sanwa Supply Co., Ltd., LCD protective film LCD-190) by the dip coating method, and dried at 70 ° C. for 60 seconds. Thereafter, the film was further dried at 80 ° C. for 30 minutes to form an antiglare layer on which the coating layer 16 having good conformity with the uneven layer 14 and the biological lipid component was provided. Ra of the antiglare layer was 0.32 μm, Sm was 230 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 40 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 2. The visibility evaluation of the display image was 3.

Next, the above coating agent was applied and dried on a PET film to produce a flat film having no irregularities 13 on the surface. The contact angle of the obtained flat film with respect to oleic acid was 37 °.
(Example 14)
Hexafunctional urethane acrylate (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., Purple UV-7600B) 0.25 parts by mass Dicyclopentanyl acrylate 0.25 parts by mass Modified colloidal silica of Production Example 1 (average particle size 55 nm, 2-propanol 1.70 parts by mass 1-hydroxycyclohexyl phenyl ketone 0.03 parts by mass Methyl isobutyl ketone 100 parts by mass The above raw materials were mixed to form a coating agent 16 that is compatible with 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. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light quantity 400 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 11 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. The visibility evaluation of the display image was 4. These visibility evaluations were sufficiently improved as compared with Example 7 in which the modified colloidal silica having an average particle diameter of 55 nm was not included.

Next, the coating agent was coated on the PET film from the coating agent, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 11 °, and the contact angle could be greatly reduced as compared with Example 7. That is, the familiarity with fingerprints by the lipid component derived from the living body could be remarkably improved.
(Example 15)
Hexafunctional urethane acrylate (Nippon Synthetic Chemical Industry Co., Ltd., Purple light UV-7600B) 0.30 parts by weight Trimethylolpropane triacrylate 0.05 parts by weight Polymethyl methacrylate 0.15 parts by weight Modified colloidal silica of Production Example 1 ( (Average particle size 55 nm, 30% solution of 2-propanol) 1.70 parts by mass 1-hydroxycyclohexyl phenyl ketone 0.03 parts by mass Methyl isobutyl ketone 100 parts by mass The above raw materials are mixed to form a coating layer 16 that is compatible with fingerprints. A coating agent was obtained. 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. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light quantity 400 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.33 μm, Sm was 220 μm, and the haze value of this film was 10%. The contact angle with respect to triacetin was 12 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. Moreover, the visibility evaluation of the display image was 4, which was improved as compared with Example 9 in which the modified colloidal silica having an average particle diameter of 55 nm was not included.

Next, the coating agent was coated on the PET film from the coating agent, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 14 °, which was slightly better than that of Example 9.
(Example 16)
Hexafunctional urethane acrylate (purple UV-7600B manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 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 diameter 55 nm, 30% solution of 2-propanol) 1.70 parts by mass 1-hydroxycyclohexyl phenyl ketone 0.03 parts by mass Methyl isobutyl ketone 100 parts by mass The above raw materials are mixed to form a coating layer 16 that is compatible with fingerprints. An agent was used. On the other hand, the coating agent was applied to a commercially available AG film (Sanwa Supply Co., Ltd., LCD protective film LCD-190) by the dip coating method, and dried at 70 ° C. for 60 seconds. Thereafter, ultraviolet rays are irradiated under a nitrogen stream by a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) (accumulated light amount 200 mJ / cm ² ), and the coating layer 16 having a good familiarity with the fingerprint is provided on the uneven layer 14. An antiglare layer was formed. Ra of the antiglare layer was 0.32 μm, Sm was 210 μm, and the haze value of this film was 9%. The contact angle with respect to triacetin was 11 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on this touch panel 20 was 4. The visibility evaluation of the display image was 4. These visibility evaluations were sufficiently improved as compared with Example 8 in which modified colloidal silica having an average particle diameter of 55 nm was not included.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 14 °, which was significantly improved as compared with Example 8.
(Example 17)
The surface material for display 10 was the same as in Example 15 except that the modified colloidal silica of Production Example 2 (average particle size 20 nm, 30% solution of a mixture of xylene and n-butanol) was used as the modified colloidal silica. Was made. Ra of the concavo-convex layer 14 was 0.32 μm, Sm was 220 μm, and the haze value of this film was 9%. The contact angle with respect to triacetin was 12 °.

  The fingerprint visibility of the display surface material 10 was 4. The visibility evaluation of the display image was 4. These visibility evaluations were sufficiently improved as compared with Example 8 in which modified colloidal silica having an average particle diameter of 55 nm was not included.

Next, the coating agent was applied onto a PET film, dried, and then irradiated with ultraviolet rays to produce a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 13 °, which was significantly improved as compared with Example 8. In Example 17, compared with Example 16, there was almost no difference in contact angle and visibility evaluation.
(Comparative Example 1)
5 parts by mass of polymethyl methacrylate,
Polymethyl methacrylate-b-polyacrylic acid (perfluorooctylethyl), that is, 0.05 part by mass of a block copolymer,
Methyl ethyl ketone 100 parts by mass The above raw materials were mixed to form a coating agent for forming the coating layer 16. On the other hand, the above coating agent was applied to a commercially available AG film (Sanwa Supply Co., Ltd., LCD protective film LCD-190) by dip coating, dried at 70 ° C. for 60 seconds, and further dried at 80 ° C. for 30 minutes. . Ra of the obtained anti-glare layer was 0.33 μm, Sm was 230 μm, and the haze value of this film was 11%. The contact angle with respect to triacetin was 73 °.

  Next, a pressure-sensitive adhesive layer 15 made of a silicone-based pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce a display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 1. The visibility evaluation of the display image was 3.

Next, the coating agent was applied and dried on a PET film to form a flat film without the uneven portion 13. The contact angle of the obtained flat film with respect to oleic acid was 71 °.
(Comparative Example 2)
Pentaerythritol triacrylate 50 parts by mass Dicyclopentanyl acrylate 50 parts by mass 1-hydroxycyclohexyl phenyl ketone 2 parts by mass Methyl ethyl ketone 150 parts by mass The above raw materials were mixed and applied to a PET film having a thickness of 100 μm by a dip coating method. Dry at 70 ° C. for 60 seconds. Then, a 120 W high-pressure mercury lamp (manufactured by Nippon Batteries Co., Ltd.) was irradiated with ultraviolet rays (integrated light quantity 400 mJ / cm ² ) and cured to produce a flat film that had good familiarity with fingerprints but had no irregularities 13. . The flat film had an Ra of 0.01 μm and an Sm of 12 μm, and the haze value of the film was 0.3%. The contact angle with respect to triacetin was 45 °.

  Next, the pressure-sensitive adhesive layer 15 made of an acrylic pressure-sensitive adhesive was formed on the surface of the PET film opposite to the concavo-convex portion 13 to produce the display surface material 10. This was bonded to the front part of the touch panel body to produce the touch panel 20. The fingerprint visibility evaluation on the touch panel 20 was 1. The visibility evaluation of the display image was 4. The contact angle of the obtained film with respect to oleic acid was 30 °.

It should be noted that the present embodiment can be implemented with the following modifications.
-Elaidic acid or the like can be used instead of oleic acid for measuring the contact angle.

-It can comprise so that the visibility of the display surface with respect to lipid-derived lipid components other than a fingerprint may be improved.
-It can also comprise so that the display surface material 10 may be attached to the surface of a display using an adhesive etc., without providing the adhesive layer 15 in the back surface of the display surface material 10. FIG.

-The uneven | corrugated | grooved part 13 in the surface of the said glare-proof layer can also be represented by the maximum height (Ry) prescribed | regulated to JISB0601-1994, ten-point average roughness (Rz), etc.
-The display surface material 10 is configured so that the chroma C ^* defined by the following formula is increased from the chromaticity a ^* and b ^* specified in JIS Z 8729, whereby a biologically derived lipid The color can be the same as that of the component, and the visibility can be further improved.

C ^* = ((a ^* ) ² + (b ^* ) ² ) ^1/2
The particle size distribution of the metal oxide fine particles can be made as narrow (sharp) as possible to improve the dispersibility of the metal oxide fine particles in the resin and to sufficiently exhibit the capillary phenomenon.

Furthermore, the technical idea grasped from the embodiment will be described below.
The antiglare layer is composed of a concavo-convex layer having concavo-convex portions formed by fine particles or concavo-convex transfer, and the concavo-convex layer has an affinity for a biological lipid component forming a fingerprint. The display surface material according to any one of claims 1 to 4. When comprised in this way, the effect of the invention which concerns on any one of Claims 1-4 can be improved.

  The anti-glare layer is composed of a concavo-convex layer having concavo-convex portions formed by fine particles or concavo-convex transfer, and a coating layer formed thereon, and a biological lipid component in which the coating layer forms a fingerprint The display surface material according to any one of claims 1 to 4, wherein the display surface material has an affinity for. When comprised in this way, the effect of the invention which concerns on any one of Claims 1-4 can be improved.

  The display according to any one of claims 1 to 4, wherein a functional layer that exhibits a function as a display surface material is provided between the transparent substrate and the antiglare layer. Surface material. When constituted in this way, in addition to the effect of the invention according to any one of claims 1 to 4, the function based on the functional layer can be exhibited.

  The display surface material according to any one of claims 1 to 4, 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 1-4, the surface material for displays can be easily affixed on the surface of a display.

  The surface material for display according to any one of claims 2 to 4, wherein the metal oxide is silicon oxide. When constituted in this way, in addition to the effect of the invention according to any one of claims 2 to 4, fine particles such as colloidal silica can be easily utilized.

Sectional drawing which shows the surface material for a display in which the uneven | corrugated | grooved part of the surface was formed with microparticles | fine-particles in embodiment. (A) is sectional drawing which shows the surface material for a display which formed the uneven | corrugated | grooved part of the surface with microparticles | fine-particles, and formed the coating layer on the uneven | corrugated | grooved part surface, (b) The surface material for a display which formed the uneven | corrugated | grooved part of the surface by the uneven | corrugated transfer (C) is sectional drawing which shows the surface material for displays which formed the coating layer in the uneven | corrugated | grooved part surface of (b). (A) is sectional drawing which shows typically a resistive film type touchscreen, (b) is sectional drawing which shows typically the resistive film type touchscreen of another form. Sectional drawing which shows an electromagnetic induction type touchscreen typically.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Display surface material, 11 ... Transparent base material, 13 ... Uneven part, 14 ... Uneven layer, 20 ... Touch panel as a display.

Claims (5)

A display surface material disposed and used on the surface of a display, comprising a transparent base material provided with an antiglare layer having uneven portions on the surface by a resin, and formed of the resin for oleic acid A surface material for a display, wherein the flat film has a contact angle of 60 ° or less. The display surface material according to claim 1, wherein the resin contains a metal oxide having an average particle diameter of 1 to 200 nm. 3. The resin according to claim 1, wherein the resin does not contain a fluorine atom, or when the resin contains a fluorine atom, the fluorine atom content is 0.05% by mass or less. Surface material for display. The uneven portion on the surface of the antiglare layer is 0.05 to 5 μm as an arithmetic average roughness (Ra) defined in JIS B 0601-1994, and is 5 to 500 μm as an average interval (Sm) between the uneven portions. The display surface material according to any one of claims 1 to 3, wherein the surface material is for display. A display comprising the surface material for display according to any one of claims 1 to 4 disposed on a surface thereof.

Images