TW201339626A - Antireflective member - Google Patents

Abstract

The objective of the present invention is to provide an antireflective member which has a good balance between low reflectance characteristics and a neutral color. An antireflective member of the present invention is provided with a base that is formed of a polyester, a first layer, a second layer and a third layer; and these components are laminated in the aforementioned order. The first layer has a reflectance within the range of from 1.52 to 1.65 (inclusive). The second layer has a reflectance within the range from 1.67 to 1.80 (inclusive) and a thickness within the range from 100 nm to 180 nm (inclusive). The third layer has a reflectance within the range from 1.30 to 1.45 (inclusive) and a thickness within the range from 70 nm to 130 nm (inclusive).

Description

Anti-reflection member

The present invention relates to an antireflection member used in a touch panel or a liquid crystal display or the like.

In recent years, with the spread of touch panels, liquid crystal displays, and the like, an anti-reflection member (anti-reflection film) for suppressing glare or the like is attracting attention.

In the past, various antireflection members have been proposed which have a structure in which a plurality of layers having different refractive indices are laminated (see, for example, Japanese Patent Laid-Open Publication No. Hei.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2010-32735

Among the antireflection members described above, in order to further reduce the reflection by a wet method, a method of laminating three layers of a medium refractive index layer, a high refractive index layer, and a low refractive index layer is known.

However, in the three-layer anti-reflection member, although the reflectance is low, the light on the short-wavelength side (blue, wavelength λ = 400 to 500 nm) and the light on the long-wavelength side (red, λ = 600 to 800 nm) The reflectance is relatively higher than that of the medium-wavelength region (yellow, λ=500~600nm), so the reflection The color is clearly purple, and there are many situations in which the appearance is problematic.

The present invention has been made in view of the above problems, and an object thereof is to provide an antireflection member which has both low reflectance characteristics and neutral hue.

The antireflection member according to the first aspect of the present invention includes a base material made of polyester, a first layer, a second layer, and a third layer, and these elements are laminated in the above-described order, and the refractive index of the first layer is In the range of 1.52 or more and 1.65 or less, the refractive index of the second layer is in the range of 1.67 or more and 1.80 or less, and the thickness thereof is in the range of 100 nm or more and 180 nm or less, and the refractive index of the third layer is in the range of 1.30 or more and 1.45 or less. The thickness is in the range of 70 nm or more and 130 nm or less.

In the antireflection member according to the second aspect of the present invention, the thickness of the first layer is in a range of 0.5 μm or more and 100 μm or less.

The antireflection member according to the third aspect of the present invention is the first or second aspect, wherein a* of the CIE 1976L*a*b* color space of the transmission color generated by the standard C light source is -0.5 or more and 0.0 or less. In the range of b* in the range of 0.2 or more and 0.8 or less, the reflection color produced by the standard C light source has a range of a* in the CIE 1976L*a*b* color space of -8.0 or more and 9.0 or less, and b* is -9.0 or more and 3.0 or less. The scope.

The antireflection member according to the fourth aspect of the present invention is the first to third aspect, wherein the second layer has a thickness of 100 nm or more and 160 nm or less. The thickness of the third layer is in the range of 70 nm or more and 110 nm or less.

An antireflection member according to a fifth aspect of the present invention is characterized in that a first layer, a second layer, and a third layer are sequentially laminated on a surface of a polyester film, and a refractive index of 1.52 or more and 1.65 or less is formed. The first layer is formed in a range of a thickness of 1.0 μm or more and 10.0 μm or less, and the second layer is formed in a range of a refractive index of 1.67 or more and 1.80 or less and a thickness of 100 nm or more and 160 nm or less, and a refractive index of 1.30 or more and 1.45. The third layer is formed in the range of 70 nm or more and 110 nm or less in the following range.

In other words, the antireflection member according to the fifth aspect of the present invention is the fourth aspect, wherein the thickness of the first layer is in a range of 1.0 μm or more and 10.0 μm or less.

Further, in the present invention, among the CIE 1976 L*a*b* color spaces, the a* of the transmission color generated by the standard C light source is preferably in the range of -0.5 or more and 0.0 or less, and b* is preferably 0.2 or more and 0.8. In the following range, in the CIE 1976 L*a*b* color space, the a* of the reflection color by the standard C light source is preferably in the range of 0.0 or more and 9.0 or less, and b* is preferably in the range of -9.0 or more and 0.0 or less.

That is, the antireflection member according to the sixth aspect of the present invention is the fourth or fifth aspect, wherein a* of the CIE 1976L*a*b* color space of the transmission color by the standard C light source is -0.5 or more. In the range of 0.0 or less, b* is in the range of 0.2 or more and 0.8 or less, and the range of a* in the CIE 1976La*b* color space generated by the standard C light source is 0.0 or more and 9.0 or less. , b* is in the range of -9.0 or more and 0.0 or less.

The antireflection member according to the seventh aspect of the present invention, wherein the second layer has a thickness of 130 nm or more and 180 nm or less, and the third layer has a thickness of 80 nm or more and 130 nm or less. range.

The antireflection member according to the eighth aspect of the present invention is the seventh aspect, wherein a* of the CIE 1976L*a*b* color space of the transmission color by the standard C light source is in a range of -0.5 or more and 0.0 or less, b * In the range of 0.2 or more and 0.8 or less, a* in the CIE 1976L*a*b* color space of the reflection color by the standard C light source is in the range of -8.0 or more and 2.0 or less, and b* is in the range of -6.0 or more and 3.0 or less.

In the present invention, the minimum reflectance is preferably 0.5% or less, the average visual reflectance is preferably 0.7% or less, and the total light transmittance is preferably 94% or more.

In other words, the anti-reflection member according to the ninth aspect of the present invention is the first to eighth aspects, wherein the minimum reflectance is 0.5% or less, and the average visual reflectance is 0.7% or less. The transmittance is above 94%.

The invention of any one of the first to ninth aspects, wherein the first layer contains a cured product of a first ultraviolet curable resin, and the first ultraviolet curable resin contains At least one of a reactive organofunctional alkoxysilane and a partially hydrolyzed polymer thereof, the second layer comprising a cured product of a second ultraviolet curable resin, The second ultraviolet curable resin is at least one of alkoxysilane having a reactive organic functional group and a partially hydrolyzed polymer thereof, and the third layer is composed of an alkoxysilane and a partially hydrolyzed polymer thereof. At least one hardened material is composed of cerium oxide.

The anti-reflection member according to the eleventh aspect of the invention is the tenth aspect, wherein the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the first ultraviolet curable resin to the first layer is 3 More than % by mass.

According to a tenth or eleventh aspect, the anti-reflection member according to the twelfth aspect of the present invention, wherein the alkoxysilane and the partially hydrolyzed polymer thereof in the second ultraviolet curable resin are opposite to the second layer The ratio is 3% by mass or more.

Further, in the present invention, the third layer is composed of a polymer of a mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton, and preferably contains hollow cerium oxide particles.

In a third aspect of the invention, the third aspect, wherein the third layer comprises a polymer of a mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton and a hollow ceria. particle.

Further, in the invention, it is preferable that the anti-adhesion layer is laminated on the surface of the substrate opposite to the first layer.

In any one of the first to thirteenth aspects, the anti-reflection member according to the fourteenth aspect of the present invention, further comprising the anti-adhesive layer laminated on the surface of the substrate opposite to the first layer Layered.

The present invention combines the low reflectance characteristics of the antireflection member with the neutral hue.

Embodiments of the invention are described below.

In the embodiment of the present invention, as shown in FIG. 1, the anti-reflection member A includes a substrate 4, a first layer (hard coat layer) 1, a second layer (high refractive index layer) 2, and a third layer. (low refractive index layer) 3. The substrate 4, the first layer 1, the second layer 2, and the third layer 3 are laminated in this order. That is, the first layer 1 is laminated on the first main surface (single side) of the substrate 4, and the second layer 2 is laminated on the main surface on the opposite side of the first layer 1 and the substrate 4, and the second layer 2 is The third layer 3 is laminated on the main surface (single side) on the opposite side of the first layer 1. Any of the base material 4, the first layer 1, the second layer 2, and the third layer 3 has light transmissivity, and the antireflection member A has light transmissivity as a whole.

In the present embodiment, the refractive index of the first layer 1 is in the range of 1.52 or more and 1.65 or less. Further, the refractive index of the second layer 2 is in the range of 1.67 or more and 1.80 or less, and the thickness thereof is in the range of 100 nm or more and 180 nm or less. Further, the refractive index of the third layer 3 is in the range of 1.30 or more and 1.45 or less, and the thickness thereof is in the range of 70 nm or more and 130 nm or less.

Further, the refractive index of the optical material is generally expressed by the refractive index of sodium D-ray (wavelength 589.3 nm).

By setting the refractive indices and thicknesses of the first layer 1, the second layer 2, and the third layer 3 in this manner, the wavelength dependence of the reflectance of the antireflection member can be reduced. The color of the reflected light from the anti-reflection member can be made close to white, and the low reflectance of the anti-reflection member A can be achieved.

The thickness of the first layer 1 is preferably in the range of 0.5 μm or more and 10.0 μm or less. In this case, the mechanical strength of the anti-reflection member A is increased.

When the light of the standard C light source defined by the CIE is incident on the anti-reflection member A, the a* in the CIE 1976L*a*b* color space of the transmission color (the color of the transmitted light) is preferably -0.5 or more and 0.0 or less. The range of b* is preferably in the range of 0.2 or more and 0.8 or less. Further, in the case where the light of the standard C light source defined by the CIE is incident on the anti-reflection member A, the a* in the CIE 1976L*a*b* color space of the reflected color (the color of the reflected light) is preferably -8.0 or more. In the range of 9.0 or less, b* is preferably in the range of -9.0 or more and 3.0 or less.

In the present embodiment, the thickness of the second layer 2 is in the range of 100 nm or more and 160 nm or less, and the thickness of the third layer 3 is preferably in the range of 70 nm or more and 110 nm or less. In this case, the reflected color from the anti-reflection member A is closer to white. The thickness of the first layer 1 is more preferably in the range of 1.0 μm or more and 10.0 μm or less. In this case, the mechanical strength of the anti-reflection member A is sufficiently increased.

Further, when the thickness of the second layer 2 is set to be in the range of 100 nm or more and 160 nm or less, and the thickness of the third layer 3 is set to be in the range of 70 nm or more and 110 nm or less, the light of the standard C light source defined by the CIE is incident on the antireflection. In the case of the member A, the a* in the CIE 1976L*a*b* color space of the transmission color (the color of the transmitted light) is preferably in the range of -0.5 or more and 0.0 or less, and b* is preferably in the range of 0.2 or more and 0.8 or less. In addition, the light of the standard C light source specified by the CIE is incident on the anti-reflection member A. In the CIE 1976L*a*b* color space of the reflection color (the color of the reflected light), a* is preferably in the range of 0.0 or more and 9.0 or less, and b* is preferably in the range of -9.0 or more and 0.0 or less. In this case, the reflected light from the anti-reflection member A is particularly closer to white, and the visibility is not easily lowered.

In the present embodiment, the thickness of the second layer 2 may be in the range of 130 nm or more and 180 nm or less, and the thickness of the third layer 3 may be in the range of 80 nm or more and 130 nm or less. In this case, the color of the reflected light is close to white, but slightly blue. The reflected light from the anti-reflection member A is derived from the reflected light of the ITO film and the color of the light is very close to white. Therefore, the anti-reflection member A is suitable for use with an ITO film which is widely used as a transparent electrode. In this case, the color of the reflected light from the ITO film can be made inconspicuous from the outside. The use of the antireflection member A in combination with the ITO film may be, for example, applied to an image display device 6 to be described later.

Further, when the thickness of the second layer 2 is set to be in the range of 130 nm or more and 180 nm or less, and the thickness of the third layer 3 is set to be in the range of 80 nm or more and 130 nm or less, the light of the standard C light source defined by the CIE is incident on the antireflection member. In the case of A, a* in the CIE 1976L*a*b* color space of the transmission color (color of transmitted light) is preferably in the range of -0.5 or more and 0.0 or less, and b* is preferably in the range of 0.2 or more and 0.8 or less. Further, in the case where the light of the standard C light source defined by the CIE is incident on the anti-reflection member A, the a* in the CIE 1976L*a*b* color space of the reflected color (the color of the reflected light) is preferably -8.0 or more. In the range of 2.0 or less, b* is preferably in the range of -6.0 or more and 3.0 or less. In this case, the reflected light from the anti-reflection member A and The light from which the reflected light from the ITO film is superposed is closer to white, and the visibility is not easily lowered.

The minimum reflectance of the anti-reflection member A may be 0.5% or less, the average visual reflectance may be 0.7% or less, and the total light transmittance may be 94% or more. In this case, the anti-reflection member A may be It exhibits excellent light transmittance, transparency, and low reflectivity, and exhibits excellent performance against reflection.

The materials of the first layer 1, the second layer 2, and the third layer 3 are not particularly limited. In the first example of a suitable combination of materials of the first layer 1, the second layer 2, and the third layer 3, the first layer 1 contains a cured product of a first ultraviolet curable resin, and the first ultraviolet curable resin is At least one of alkoxysilane having a reactive organic functional group and a partially hydrolyzed polymer thereof. Further, in this example, the second layer 2 contains a cured product of a second ultraviolet curable resin containing an alkoxysilane having a reactive organic functional group and a partially hydrolyzed polymer thereof. At least one. Further, in this example, the third layer 3 is composed of at least one hardened material of alkoxysilane and a partially hydrolyzed polymer thereof and cerium oxide. In this case, the hardness of the third layer 3 becomes very high, whereby the mechanical strength of the anti-reflection member A is improved. Thereby, the scratch resistance of the anti-reflection member A becomes high. Further, since any of the first layer 1, the second layer 2, and the third layer 3 contains a cured product of a composition containing an alkoxydecane-based compound, the adhesion between the layers is improved. In particular, both the first layer 1 and the second layer 2 contain a cured product of an ultraviolet curable resin containing an alkoxydecane compound having a reactive organic functional group, and thus a reactive organic official When the energy base reacts, the adhesion between the first layer 1 and the second layer 2 is further enhanced. Further, since the first layer 1 contains a cured product of an ultraviolet curable resin and has a sufficiently high thickness, the hardness of the antireflection member A is increased.

In the case where the first layer 1 contains a cured product of the first ultraviolet curable resin, the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the first ultraviolet curable resin to the first layer 1 is 3% by mass or more. good. In this case, the scratch resistance of the anti-reflection member A is further improved, and the adhesion between the layers is further improved.

Further, in the case where the second layer 2 contains a cured product of the second ultraviolet curable resin, the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the second ultraviolet curable resin to the second layer 2 is 3 masses. More than % is better. In this case, the scratch resistance of the anti-reflection member A is further improved, and the adhesion between the layers is further improved.

In a second example of a suitable combination of materials of the first layer 1, the second layer 2, and the third layer 3, the third layer 3 is a polymer containing a mixture of an alkoxy decane and an alkoxy decane having a fluorocarbon skeleton. With hollow ceria particles. In this case, the materials of the first layer 1 and the second layer 2 are not particularly limited. In this example, the third layer 3 is liable to have a low refractive index, and even the antifouling property and chemical resistance of the third layer 3 are improved.

Further, the anti-reflection member A may further include an anti-adhesion layer 5. The anti-adhesion layer 5 is laminated on the surface of the substrate opposite to the first layer 1. In this case, when the anti-reflection member A is wound into a roll shape or the like and overlapped, the occurrence of adhesion can be suppressed. Further, in the case where the anti-reflection member A is superposed, the smoothness of the surface of the anti-reflection member A is improved.

The constituent elements of the anti-reflection member A will be further described in detail below.

[About substrate 4]

The base material 4 is made of polyester. For example, the substrate 4 is formed of a polyester film. Among the polyester films, particularly biaxially stretched films of polyethylene terephthalate (PET) or polyethylene naphthalate, which have excellent mechanical properties, heat resistance, chemical resistance, etc., are suitable as A material such as a magnetic tape, a ferromagnetic film tape, a film for packaging, a film for electronic parts, an electrical insulating film, a film for lamination, a film attached to a surface of a display, or a film for protection of various members. In particular, in the use of a display, a biaxially stretched film of polyethylene terephthalate (PET) or polyethylene naphthalate, which is suitable as a member of a liquid crystal display device, a touch panel, a backlight panel, etc. The base film, the base film of the antireflection member of the television, the antireflection member used for the front filter of the plasma TV, the near-infrared blocking film, the base film of the electromagnetic shielding film, and the like.

The polyester is, for example, an aromatic dicarboxylic acid component such as terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid or 4,4'-diphenyldicarboxylic acid, and ethylene glycol, 1 An aromatic polyester produced by reacting a diol component such as 4-butanediol, 1,4-cyclohexanedimethanol, and 1,6-hexanediol, especially polyethylene terephthalate Diester, polyethylene-2,6-naphthalate or the like is preferred. Further, the polyester may be a copolymerized polyester of a plurality of components and the like exemplified above.

The substrate 4 may also contain organic or inorganic particles. In this case, the winding property, handling property, and the like of the substrate 4 are improved. Such particles can be exemplified by calcium carbonate particles. Calcium oxide particles, alumina particles, kaolin, cerium oxide particles, zinc oxide particles, crosslinked acrylic resin particles, crosslinked polystyrene resin particles, urea resin particles, melamine resin particles, crosslinked polyoxymethylene resin particles, and the like.

The base material 4 may contain a coloring agent, an antistatic agent, an ultraviolet absorber, an antioxidant, a lubricant, a catalyst, another resin, etc., in the range which does not impair transparency.

The haze of the substrate 4 is preferably 3% or less. In this case, the visibility of the antireflection member A or the like is improved, and the antireflection member A is a film which is particularly suitable for optical use. If the haze is 1.5% or less, it is more preferable.

The thickness of the substrate 4 is not particularly limited, but is preferably in the range of 25 μm or more and 200 μm or less. In particular, when the thickness of the substrate 4 is 25 μm or more and 100 μm or less, the antireflection member A can be made thinner and lighter, and interference between the two surfaces (front and back) of the antireflection member A can be suppressed, and further, The heat shrinkage at the time of heating of the base material 4 is suppressed, and the problem of deterioration of workability by heat shrinkage of the base material 4 can be suppressed.

The surface reflectance of the substrate 4 is preferably in the range of 4% or more and 6% or less. When the surface reflectance of the substrate 4 is in this range, interference between the two surfaces (front and back surfaces) of the substrate 4 can be suppressed, and it is easy to ensure low reflectance characteristics.

In the present embodiment, the surface of the substrate 4 is preferably subjected to easy subsequent treatment. The subsequent treatment may be a dry treatment such as a plasma treatment or a corona treatment, a chemical treatment such as an alkali treatment, or a coating treatment for forming an easy-adhesion layer. easy In the subsequent process, when the base material 4 which is a material of the anti-reflection member A is individually wound into a roll shape or the like and overlapped, it is carried out in order to suppress the occurrence of adhesion or to improve the smoothness. In the above-described easy-to-continue treatment, it is preferable to laminate the easy-adhesion layer on the surface (first main surface) of the substrate 4. In this case, it is preferable that the substrate 4 and the first layer 1 are interposed between the substrate and the first layer 1. Even easy handling can be utilized to enhance the adhesion between the substrate 4 and the first layer 1. The material of the easy-adhesion layer is not particularly limited, and is preferably formed of a polyester resin, an acrylic resin or the like. In order to suppress the reflectance of the anti-reflection member A from increasing due to the interface reflection on the surface of the adhesion layer, the refractive index of the adhesion layer is desirably close to the refractive index of the substrate 4 and the refractive index of the first layer 1, especially at 1.58 to 1.75. The range is good. The optical film thickness of the easy-adhesion layer is preferably in the range of 120 to 160 nm. In this case, high adhesion between the substrate 4 and the first layer 1 can be ensured, and an increase in reflectance or interference spots caused by the presence of the easy-to-adhere layer can be suppressed.

[About the first layer 1]

The first layer 1 is preferably formed in such a manner as to have a hard coat layer higher than the hardness of the substrate 4. Thereby, the mechanical strength of the anti-reflection member A is improved. The pencil hardness of the first layer 1 is preferably H or more, and more preferably 2H or more.

The refractive index of the first layer 1 is required to be 1.52 or more and 1.65 or less. By setting the refractive index of the first layer 1 within this range, the occurrence of interference spots between the first layer 1 and the substrate 4 can be suppressed. The thickness of the first layer 1 is not particularly limited. Further, in one form of the embodiment, the first layer 1 The thickness must be in the range of 1.0 μm or more and 10.0 μm or less. As long as the thickness of the first layer 1 is in this range, the mechanical strength of the anti-reflection member A is sufficiently enhanced. Further, the thickness of the first layer 1 may be in the range of 0.5 μm or more and 10.0 μm or less. As long as the thickness of the first layer 1 is in this range, the mechanical strength of the anti-reflection member A can be improved.

The first layer 1 is preferably formed of a reactive curable resin composition, and is preferably formed of, for example, at least one of a thermosetting resin composition and a free radiation curable resin composition. The thermosetting resin composition contains a phenol resin, a urea resin, a diallyl citrate resin, a melamine resin, an unsaturated polyester resin, a polyurethane resin, an epoxy resin, an amino alkyd resin, an anthracene resin. A thermosetting resin such as a polyoxyalkylene resin. The thermosetting resin may be used together with a crosslinking agent, a polymerization initiator, a curing agent, a hardening accelerator, a solvent, and the like as necessary. Such a thermosetting resin composition can be formed by, for example, coating on a substrate 4 (having a surface having an easy adhesion layer), and then heating the thermosetting resin composition to heat-harden it to form a first Layer 1.

The free radiation curable resin composition is preferably a resin containing a functional group having an acrylate type. The resin having an acrylate functional group may, for example, be an oligomer or a prepolymer such as a (meth) acrylate of a comparative low molecular weight polyfunctional compound. Examples of the polyfunctional compound include a polyester resin, a polyether resin, an acrylic resin, an epoxy resin, an urethane resin, an alkyd resin, a acetal resin, a polybutadiene resin, a polythiol resin, and a polyvalent compound. Alcohol, etc. The free radiation curable resin composition may further contain a reactive diluent. The reactive diluent may, for example, be ethyl (meth)acrylate. a monofunctional monomer such as ethylhexyl (meth)acrylate, styrene, methylstyrene or N-vinylpyrrolidone, and trimethylolpropane tri(meth)acrylate or (meth)acrylic acid Hexanediol ester, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6- a polyfunctional monomer of hexanediol di(meth)acrylate or neopentyl glycol di(meth)acrylate.

In the case where the free radiation curable resin composition is a photocurable resin composition such as an ultraviolet curable resin composition, the photocurable resin composition preferably contains a photopolymerization initiator. Examples of the photopolymerization initiator include acetophenones, diphenylketones, α-amyloxime esters, and thioxanthones. The photo-curable resin composition may contain a photo-sensitizer in addition to or in place of the photopolymerization initiator. Examples of the photosensitizer include n-butylamine, triethylamine, tri-n-butylphosphine, and thioxanthone. The photocurable resin composition can be applied to the substrate 4 by, for example, and then the photocurable resin composition is irradiated with light such as ultraviolet rays to be photocured to form the first layer 1.

The refractive index of the first layer 1 can be easily adjusted by the composition of the resin composition for forming the first layer 1. The first layer 1 contains particles for refractive index adjustment, and the refractive index of the first layer 1 can be adjusted by adjusting the ratio thereof.

The particle diameter of the particles for refractive index adjustment is sufficiently small, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles. In this case, the light transmittance of the first layer 1 can be sufficiently maintained. The particle diameter of the particles for refractive index adjustment is preferably in the range of 0.5 nm or more and 200 nm or less. Particle size of the refractive index adjusting particle Is the diameter of a circle (area equivalent circle) having the same area as the projected area calculated from the electron micrograph image of the particle. The particles for refractive index adjustment are preferably particles having a high refractive index, and particularly preferably particles having a refractive index of 1.6 or more. This particle is preferably a metal or metal oxide particle.

The content of the refractive index adjusting particles in the first layer 1 can be appropriately adjusted so that the refractive index of the first layer 1 becomes an appropriate value, and in particular, the ratio of the refractive index adjusting particles in the first layer 1 is preferably adjusted. 5 vol% or more and 70 vol% or less. Specific examples of the particles for refractive index adjustment include particles containing one or two or more kinds of oxides selected from the group consisting of titanium, aluminum, lanthanum, cerium, zirconium, hafnium and ytterbium. Specific examples of the oxide include ZnO (refractive index 1.90), TiO ₂ (refractive index: 2.3 to 2.7), CeO ₂ (refractive index: 1.95), Sb ₂ O ₅ (refractive index: 1.71), and SnO ₂ (refractive index: 1.8 to 2.0). ITO (refractive index 1.95), Y ₂ O ₃ (refractive index 1.87), La ₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.05), Al ₂ O ₃ (refractive index 1.63), and the like.

It is also suitable to impart antistatic properties to the first layer 1. In this case, charging of the anti-reflection member A can be suppressed, and dust can be suppressed from adhering to the anti-reflection member A. In order to achieve this, the first layer 1 is preferably made of conductive particles. The conductive particles can also exhibit the function of the particles for refractive index adjustment. The conductive particles are preferably nanoparticles, and particularly preferably ultrafine particles having a particle diameter of 0.5 nm or more and 200 nm or less. The particle diameter of the conductive particles is also the diameter of the area equivalent circle. Examples of the material of the conductive particles include a suitable metal having conductivity, a metal oxide, and the like. Specific examples thereof include oxides of one or two or more kinds selected from the group consisting of indium, zinc, tin, and antimony. More specifically, Examples thereof include indium oxide (ITO), tin oxide (SnO ₂ ), antimony/tin oxide (ATO), lead/titanium oxide (PTO), and antimony oxide (Sb ₂ O ₅ ). In order to impart sufficient antistatic property to the first layer 1, it is preferable to contain conductive particles, and the sheet resistance of the first layer 1 is preferably 10 ¹⁵ Ω/sq. or less. The smaller the sheet resistance of the first layer 1 is, the more the antistatic property is improved, so the lower limit is not particularly set, but there is a limit in reducing the sheet resistance, so the practical lower limit of the sheet resistance of the first layer 1 is 10 ⁶ Ω/ Sq. The content of the conductive particles in the first layer 1 can be appropriately adjusted so that the antistatic property of the first layer 1 is appropriate, and in particular, the ratio of the conductive particles in the first layer 1 is adjusted to 5% by mass or more. 70% by mass or less is preferred.

As described above, the first layer 1 may further contain a cured product of a first ultraviolet curable resin containing an alkoxysilane having a reactive organic functional group and a partially hydrolyzed polymer thereof. At least one of them. In order to achieve this, in the case where the first layer 1 is formed of, for example, an ultraviolet curable resin composition, the ultraviolet curable resin composition preferably contains the first ultraviolet curable resin.

Examples of the reactive organic functional group in the alkoxysilane having a reactive organic functional group include an acryloyl group, a methacryl fluorenyl group, a glycidyl group, and an isocyanate group. Examples of the alkoxydecane having a reactive organic functional group include 3-methylpropenyloxypropyltrimethoxydecane, 3-methylpropenyloxypropylmethyldimethoxydecane, and 3-methyl group. Propylene methoxypropyl triethoxy decane, 3-propenyl methoxy propyl trimethoxy decane, 3-propenyl methoxy propyl methyl dimethoxy decane, 3-glycidyl ether propyl trimethyl Oxaloxane, 3-glycidyl ether propyl triethoxy decane, 3-isocyanate propyl triethoxy decane, 3-isocyanate propyl triethoxy decane, and the like.

As described above, in the case where the first layer 1 contains a cured product of the first ultraviolet curable resin, the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the first ultraviolet curable resin to the first layer 1 is It is preferably 3% by mass or more. This ratio is further preferably in the range of 5 to 10% by mass. In this case, the scratch resistance of the anti-reflection member A is further improved, and the adhesion between the layers is further improved.

[About the second layer 2]

The second layer 2 is formed of a high refractive index layer having a higher refractive index than the third layer 3. The refractive index of the second layer 2 is in the range of 1.67 or more and 1.80 or less, and the thickness (actual film thickness) is in the range of 100 nm or more and 160 nm or less. By setting the refractive index and thickness of the second layer 2 in the range as described above, the light reflectivity of the anti-reflection member A can be suppressed, and the color of the reflected light from the anti-reflection member A can be adjusted to a moderate color tone. . If the refractive index of the second layer 2 is larger than the above range, the light reflectivity of the antireflection member A is reduced, but the color of the reflected light becomes too strong, which is not preferable. In addition, if the thickness of the second layer 2 is larger than the above range, the color of the reflected light from the anti-reflection member A may have a blue color, and if the thickness becomes larger, the reflectance of the anti-reflection member A is remarkably increased, Not good. Further, if the thickness of the second layer 2 is smaller than the above range, the reflected color will be dark purple, which is not preferable.

As described above, when the thickness of the second layer 2 is increased, the reflected light tends to have a blue color, and when the thickness of the second layer 2 is in the range of 100 nm or more and 180 nm or less, the color of the reflected light is sufficiently close to white. . but In order to make the color of the reflected light particularly close to white, the thickness of the second layer 2 is preferably in the range of 100 nm or more and 160 nm or less as described above. This thickness is more preferably in the range of 130 nm or more and 160 or less.

Further, as described above, in the case where the antireflection member A and the ITO film are used in combination, in order to make the reflected light from the antireflection member A come from the reflected light of the ITO film, the color of the light is close to white, and the second layer 2 The thickness is preferably in the range of 130 nm or more and 180 nm or less. This thickness is more preferably in the range of 160 nm or more and 180 nm or less.

The second layer 2 is preferably formed of a reactive curable resin composition, and is preferably formed of, for example, at least one of a thermosetting resin composition and a free radiation curable resin composition. The thermosetting resin composition contains a phenol resin, a urea resin, a diallyl citrate resin, a melamine resin, an unsaturated polyester resin, a polyurethane resin, an epoxy resin, an amino alkyd resin, an anthracene resin. A thermosetting resin such as a polyoxyalkylene resin. The thermosetting resin may be used together with a crosslinking agent, a polymerization initiator, a curing agent, a hardening accelerator, a solvent, and the like as necessary.

The free radiation curable resin composition is preferably a resin containing an acrylate functional group. The resin having an acrylate functional group may, for example, be an oligomer or a prepolymer such as a (meth) acrylate of a comparative low molecular weight polyfunctional compound. Examples of the polyfunctional compound include a polyester resin, a polyether resin, an acrylic resin, an epoxy resin, an urethane resin, an alkyd resin, a acetal resin, a polybutadiene resin, a polythiol resin, and a polyvalent compound. Alcohol, etc. The free radiation curable resin composition may further contain a reactive diluent. The reactive diluent may, for example, be ethyl (meth)acrylate. , monofunctional monomer such as ethyl (meth) acrylate, styrene, methyl styrene, N-vinyl pyrrolidone, and trimethylolpropane tri (meth) acrylate, hexane diol (A) Acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6- a polyfunctional monomer of hexanediol di(meth)acrylate or neopentyl glycol di(meth)acrylate.

In the case where the free radiation curable resin composition is a photocurable resin composition such as an ultraviolet curable resin composition, the photocurable resin composition preferably contains a photopolymerization initiator. Examples of the photopolymerization initiator include acetophenones, benzophenones, α-amyloxime esters, and thioxanthones. In the photocurable resin composition, a photo sensitizer may be contained in addition to or in place of the photopolymerization initiator. Examples of the photosensitizer include n-butylamine, triethylamine, tri-n-butylphosphine, and thioxanthone.

The refractive index of the second layer 2 can be easily adjusted by the composition of the resin composition for forming the second layer 2. The second layer 2 contains particles for refractive index adjustment, and the refractive index of the second layer 2 can be adjusted by adjusting the ratio thereof.

The particle diameter of the particles for refractive index adjustment is sufficiently small, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles. In this case, the light transmittance of the second layer 2 can be sufficiently maintained. The particle diameter of the particles for refractive index adjustment is preferably in the range of 0.5 nm or more and 200 nm or less. The particle diameter of the refractive index adjusting particles means a diameter having a circle (area equivalent circle) having the same area as the projected area calculated from the electron micrograph image of the particles.

The particles for refractive index adjustment are preferably particles having a high refractive index, and particularly preferably particles having a refractive index of 1.6 or more. This particle is preferably a metal or metal oxide particle.

The content of the refractive index adjusting particles in the second layer 2 can be appropriately adjusted so that the refractive index of the second layer 2 becomes an appropriate value, and in particular, the ratio of the refractive index adjusting particles in the second layer 2 is adjusted. It is preferably 5% by volume or more and 70% by volume or less.

Specific examples of the particles for refractive index adjustment include particles containing one or two or more kinds of oxides selected from the group consisting of titanium, aluminum, lanthanum, cerium, zirconium, hafnium and ytterbium. Specific examples of the oxide include ZnO (refractive index 1.90), TiO ₂ (refractive index: 2.3 to 2.7), CeO ₂ (refractive index: 1.95), Sb ₂ O ₅ (refractive index: 1.71), and SnO ₂ (refractive index: 1.8 to 2.0). ITO (refractive index 1.95), Y ₂ O ₃ (refractive index 1.87), La ₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.05), Al ₂ O ₃ (refractive index 1.63), and the like.

The second layer 2 contains particles of one or more oxides selected from the group consisting of titanium, aluminum, lanthanum, cerium, zirconium, lanthanum, cerium, and may contain methacryl oxime functional decane and acryl oxime functionality. At least one of decane. In this case, the adhesion between the second layer 2 and the third layer 3 is improved. Examples of the methacryl oxime functional decane include 3-methacryloxypropyltrimethoxydecane, 3-methylpropenyloxypropylmethyldimethoxydecane, and the like. Examples of the acryl-based functional decane include 3-propenyloxypropyltrimethoxydecane, 3-propenyloxypropylmethyldimethoxydecane, and the like.

The content of the methacryl fluorenyl functional decane and the acryl fluorenyl functional decane in the second layer 2 is not particularly limited, and the methyl group in the second layer 2 is not particularly limited. The ratio of the total amount of the acryl-based functional decane to the acryl-based functional decane is preferably in the range of 5 mass% or more and 30 mass% or less. When the ratio is 5% by mass or more, the adhesion between the second layer 2 and the third layer 3 can be sufficiently improved, and if the ratio is 30% by mass or less, the crosslinking in the second layer 2 can be sufficiently enhanced. The density and the hardness of the second layer 2 can be sufficiently increased.

It is preferable that the main surface on the side opposite to the first layer 1 in the second layer 2 is subjected to surface treatment before forming the third layer 3. In this case, the wettability, the adhesion, and the like between the second layer 2 and the third layer 3 can be improved. Examples of the surface treatment include physical surface treatment such as plasma treatment, corona discharge treatment, and flame treatment, and chemical surface treatment using a coupling agent, an acid, and an alkali.

As described above, the second layer 2 may further contain a cured product of a second ultraviolet curable resin containing alkoxysilane having a reactive organic functional group and a partially hydrolyzed polymer thereof. At least one. In order to achieve this, for example, in the case where the second layer 2 is formed of the ultraviolet curable resin composition, the ultraviolet curable resin composition preferably contains the second ultraviolet curable resin.

Examples of the reactive organic functional group in the alkoxysilane having a reactive organic functional group include an acryloyl group, a methacryl fluorenyl group, a glycidyl group, and an isocyanate group. Examples of the alkoxydecane having a reactive organic functional group include 3-methylpropenyloxypropyltrimethoxydecane, 3-methylpropenyloxypropylmethyldimethoxydecane, and 3-methyl group. Propylene methoxypropyl triethoxy decane, 3-propenyl methoxy propyl trimethoxy decane, 3-propenyl methoxy propyl methyl dimethoxy decane, 3-glycidyl ether propyl trimethyl Oxydecane, 3-glycidyl ether propyl triethoxy decane, 3-isocyanate propyl three Ethoxy decane, 3-isocyanate propyl triethoxy decane, and the like.

As described above, in the case where the second layer 2 contains a cured product of the second ultraviolet curable resin, the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the second ultraviolet curable resin to the second layer 2 is It is preferably 3% by mass or more. This ratio is further preferably in the range of 5 to 10% by mass. In this case, the scratch resistance of the anti-reflection member A is further improved, and the adhesion between the layers is further improved.

[About the third layer 3]

The refractive index of the third layer 3 is lower than the refractive index of any of the substrate 4, the first layer 1 and the second layer 2. The refractive index of the third layer 3 is in the range of 1.30 or more and 1.45 or less, and the thickness (solid film thickness) is in the range of 70 nm or more and 110 nm or less.

By setting the refractive index of the third layer 3 to the range as described above, the reflectance of the anti-reflection member A is reduced due to the interference of the first layer 1 and the second layer 2, further by the third layer 3 The thickness is set in the range as described above, and the color of the reflected light from the anti-reflection member A can be appropriately adjusted.

When the thickness of the third layer 3 is in the range of 70 nm or more and 130 nm or less, the color of the reflected light is sufficiently close to white. However, in order to make the color of the reflected light particularly close to white, the thickness of the third layer 3 is preferably in the range of 70 nm or more and 110 nm or less as described above. This thickness is more preferable if it is in the range of 70 nm or more and less than 80 nm.

In addition, as described previously, the anti-reflective member A and the combined ITO In the case of the film, in order to make the color of the light reflected from the antireflection member A from the reflected light of the ITO film close to white, the thickness of the third layer 3 is preferably in the range of 80 nm or more and 130 nm or less. This thickness is more preferably in the range of 110 nm or more and 130 nm or less.

The third layer 3 is formed of, for example, a composition containing a binder material and particles for refractive index adjustment necessary for use. In the case where the binder material and the particles for refractive index adjustment are used in combination, the refractive index of the third layer 3 can be appropriately adjusted by a combination of the two, a blend ratio, and the like.

The binder material may be a polymer having at least one of an alkoxy fluorene-based resin, a saturated hydrocarbon, and a polyether as a main chain (for example, a UV-curable resin composition, a thermosetting resin composition, etc.), and a polymer chain. A resin or the like having a unit having a fluorine atom.

The alkoxy fluorene-based resin may, for example, be an alkoxy fluorene represented by R _m Si(OR') _n (R, R' is an alkyl group having 1 to 10 carbon atoms, m + n = 4, and m and n are each an integer. An oligomer and a polymer of a partially hydrolyzed condensate. Specific examples of the alkoxy oxime include tetramethoxy decane, tetraethoxy decane, tetraisopropoxy decane, tetra-n-propoxy decane, tetra-n-butoxy decane, and tetra-butoxy decane. , tetra-butoxy decane, tetra-pentaethoxy decane, tetra-penta-isopropoxy decane, tetra-penta-propoxy decane, tetra-penta-n-butoxy decane, tetra-five second butyl Oxydecane, tetra-pentadecyloxydecane, methyltrimethoxydecane, methyltriethoxydecane, methyltripropoxydecane, methyltributoxydecane, dimethylformene Oxy decane, dimethyl diethoxy decane, dimethyl ethoxy decane, dimethyl methoxy decane, dimethyl propoxy decane, dimethyl butoxy decane, methyl dimethoxy Base decane, methyl diethoxy decane, hexyl trimethoxy decane, and the like.

As the binder material, a reactive organic hydrazine compound having a plurality of groups (polymerizable double bond groups or the like) which can be crosslinked by reaction with heat or free radiation can also be used. The molecular weight of the organic cerium compound is preferably 5,000 or less. Such a reactive organic hydrazine compound may, for example, be a mono-terminal vinyl functional polydecane, a two-terminal vinyl functional polydecane, a single-end vinyl functional polyoxyalkylene, a two-terminal vinyl functional polyoxyalkylene, and These compounds are reacted with a vinyl functional polydecane, a vinyl functional polyoxyalkylene or the like. In addition to these, examples of the reactive organic hydrazine compound include 3-(meth)acryloxypropyltrimethoxydecane, 3-(meth)acryloxypropylmethyldimethoxydecane, and the like. (Meth) propylene decyl decane compound.

The particles for refractive index adjustment are preferably particles having a lower refractive index. Examples of the material of the particles for refractive index adjustment include cerium oxide, magnesium fluoride, lithium fluoride, aluminum fluoride, calcium fluoride, and sodium fluoride. It is preferable that the particles for refractive index adjustment contain hollow particles in the middle. Hollow particles refer to particles having voids surrounded by an outer shell. The refractive index of the hollow particles is preferably from 1.20 to 1.45. For the particle for refractive index adjustment, it is desirable to carry out a surface treatment for improving the wettability with the binder material.

The particle diameter of the particles for refractive index adjustment is sufficiently small, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles. In this case, the light transmittance of the third layer 3 can be sufficiently maintained. The particle diameter of the particles for refractive index adjustment is preferably in the range of 0.5 nm to 200 nm. The particle diameter of the particle for refractive index adjustment means that it has the same projected area as that of the electron micrograph image of the particle. The diameter of the circle of the area (area equivalent circle).

The content of the refractive index adjusting particles in the third layer 3 can be appropriately adjusted so that the refractive index value of the third layer 3 becomes an appropriate value, and in particular, the ratio of the refractive index adjusting particles in the third layer 3 is preferably Adjust to 20~99% by volume.

The composition may further contain water-repellent and oil-repellent materials. In this case, the third layer 3 can be imparted with antifouling properties. For water-repellent and oil-repellent materials, general wax-based materials can be used. In particular, if a fluorine-containing compound is used, the dirtiness of the third layer 3, the fingerprint, and the like are particularly improved, and the frictional resistance of the surface of the third layer 3 is reduced, and the wear resistance of the third layer 3 is improved.

A suitable form of the third layer 3 is exemplified by a polymer composed of a mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton and containing hollow cerium oxide particles. In this case, it is suitable to obtain an effect of ensuring a low refractive index or imparting antifouling properties and imparting chemical resistance. The alkoxydecane may, for example, be a polymethoxydecane or the like. Further, the alkoxydecane having a fluorocarbon skeleton may, for example, be trimethoxycarbamidyldodecylohexane or the like. A mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton can be prepared by mixing alkoxysilane having a fluorocarbon skeleton in a ratio of 5 to 1900 parts by mass based on 100 parts by mass of the alkoxysilane. . Further, a polymer of a mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton can be produced by a polymerization method such as a sol-gel method. The polymer of the mixture of alkoxy decane and alkoxy decane having a fluorocarbon skeleton preferably has a molecular weight of from 500 to 3,000. Further, the hollow ceria particles have a refractive index of preferably from 1.20 to 1.45 and a particle diameter of from 0.5 nm to 200 nm in the same manner as described above. In addition, In the third layer 3, a ratio of 5 to 233 parts by mass of the hollow cerium oxide particles is preferably contained in 100 parts by mass of the polymer of the mixture of the alkoxy decane and the alkoxy decane having a fluorocarbon skeleton.

The third layer 3 can be applied to the second layer 2 by the above-described composition, and further, the composition can be subjected to heating, humidification, ultraviolet irradiation, electron beam irradiation or the like in accordance with the properties of the binder material. It is formed by hardening.

[About anti-adhesion layer 5]

It is preferable to laminate the anti-adhesion layer 5 on the surface of the substrate 4 opposite to the first main surface. That is, the anti-adhesion layer 5 is preferably laminated on the surface of the substrate 4 opposite to the surface on which the first layer 1 is laminated. The anti-adhesion layer 5 is formed so as to suppress the occurrence of adhesion or to improve the smoothness when the anti-reflection member A is wound into a roll shape or the like. Further, the anti-adhesion layer 5 may be used to improve the adhesion when the anti-reflection member A is fixed to a member (for example, an adhesive layer or an acrylic resin film).

In order to suppress the reflectance of the anti-reflection member A from increasing due to the interface reflection of the surface of the anti-adhesion layer 5, the refractive index of the anti-adhesion layer 5 is desirably a refractive index between the substrate 4 and a member to which the anti-reflection member A is fixed. The value between the refractive indices and the optical film thickness of the anti-adhesion layer 5 is preferably 110 to 170 nm. In order to achieve this, the refractive index of the anti-adhesion layer 5 is preferably from 1.45 to 1.65. For example, in the case where the substrate 4 is a PET film having a refractive index of 1.69, the anti-reflection member A is followed by an adhesive layer having a refractive index of 1.45 to 1.65 or In the case of the acrylic resin film having a refractive index of 1.45 to 1.65, the refractive index of the anti-adhesion layer 5 is preferably 1.62, and the optical film thickness is preferably 140 nm.

The material of the anti-adhesion layer 5 is not limited, and is preferably in the range of 95% by mass or more and 80% by mass or less based on acrylate or polyurethane-acrylate, and further contains 5 mass% or more of 20% by mass of cerium oxide particles having an average particle diameter of 250 nm. % below the range.

[About anti-reflection member A]

In the anti-reflection member A obtained in the present embodiment, the reflected light rays in the first layer 1, the second layer 2, and the third layer 3 interfere with each other and cancel each other, and therefore the reflected light of the entire anti-reflection member A is The intensity will be significantly reduced.

In the conventional antireflection film, the reflectance has a wavelength dependency. In general, when light is reflected by the antireflection member, it is desirable that the reflectance at a wavelength near 550 nm where the sensitivity of the human eye is the highest is low. In this case, the reflectance of light having a wavelength of 400 to 500 nm (blue) or 600 to 800 nm (red) is relatively high, and thus the reflected color is dark purple.

In the present embodiment, by optimizing the refractive index and the film thickness of the second layer 2 and the third layer 3, the wavelength dependence of the reflectance of the anti-reflection member A can be lowered, and the reflection color can be made more than ever. It is close to white and can achieve low reflectivity.

In the case where the light from the standard C light source defined by the CIE is incident on the anti-reflection member A obtained in the present embodiment, the color (transmissive color) of the transmitted light penetrating the anti-reflection member A is CIE 1976L*a*b* color. space Among them, a* is in the range of -0.5 or more and 0.0 or less, and b* is preferably in the range of 0.2 or more and 0.8 or less. In this case, the color of the transmitted light penetrating through the anti-reflection member A is nearly colorless. Further, in the case where the light from the standard C light source defined by the CIE is incident on the surface of the third layer 3 to the anti-reflection member A obtained in the present embodiment, the color (reflected color) of the reflected light from the anti-reflection member A is The a* in the CIE 1976L*a*b* color space is preferably in the range of 0.0 or more and 9.0 or less, and b* is preferably in the range of -9.0 or more and 0.0 or less. In this case, the color of the reflected light is close to white, and the visibility is not lowered.

In particular, when the thickness of the second layer 2 is set to be in the range of 100 nm or more and 160 nm or less, the thickness of the third layer 3 is set to be in the range of 70 nm or more and 110 nm or less, or the thickness of the second layer 2 is set to be in the range of 130 nm or more and 160 nm or less. When the thickness of the third layer 3 is set to a range of 70 μm or more and less than 80 μm, the thickness is set in such a manner that, as described above, the transmission color a* is preferably in the range of -0.5 or more and 0.0 or less, b* is preferably In the range of 0.2 or more and 0.8 or less, the reflection color a* is preferably in the range of 0.0 or more and 9.0 or less, and b* is preferably in the range of -9.0 or more and 0.0 or less. In this case, the reflected light is particularly close to white.

Further, when the thickness of the second layer 2 is set to be in the range of 100 nm or more and 180 nm or less, and the thickness of the third layer 3 is set to be in the range of 70 nm or more and 130 nm or less, the thickness is set in such a manner that the transmission color a* can be used. In the range of -0.5 or more and 0.0 or less, b* may be in the range of 0.2 or more and 0.8 or less, a* of the reflection color may be in the range of -8.0 or more and 9.0 or less, and b* may be in the range of -9.0 or more and 3.0 or less. In this case, the reflected light will also be close to white.

Further, the thickness of the second layer 2 is set to be in the range of 130 nm or more and 180 nm, the thickness of the third layer 3 is set to be in the range of 80 nm or more and 130 nm or less, or the thickness of the second layer 2 is set to be in the range of 160 nm or more and 180 nm or less. When the thickness of the third layer 3 is set to be in the range of 110 nm or more and 130 nm or less, the thickness is set in such a manner that the a* of the transmission color is preferably in the range of -0.5 or more and 0.0 or less, and b* is preferably 0.2 or more and 0.8. In the following range, the a* of the reflection color is preferably in the range of -8.0 or more and 2.0 or less, and b* is preferably in the range of -6.0 or more and 3.0 or less. In this case, the color of the reflected light from the anti-reflection member from the reflected light of the ITO film is very close to white.

The total light transmittance of the antireflection member A obtained by the present embodiment measured by JIS K7361-1 may be 94% or more, and the haze measured by JIS K7136 may be 0.9% or less, and the minimum reflectance may be It may be 0.5% or less, and the average visual reflectance may be 0.7% or less. In this case, the anti-reflection member A exhibits excellent light transmittance, transparency, and low reflectivity, and exhibits excellent performance against reflection. The minimum reflectance refers to the reflectance of the antireflection member A at the wavelength of the light having the smallest reflectance (minimum reflectance wavelength) among the reflectances of the monochromatic light in the wavelength range of 380 to 800 nm. In addition, the average visual reflectance is a value obtained by correcting the reflectance of each wavelength in the wavelength range of 380 to 800 nm by the specific sensitivities and averaging them.

In the present embodiment, such a high-performance anti-reflection member A can be obtained. By designing the refractive indices and thicknesses of the respective layers of the first layer 1, the second layer 2, and the third layer 3 to the above-described appropriate ranges, high total light transmittance as described above can be achieved. In addition, in order to make the haze 0.9% or less, in the second layer 2 In the case of containing inorganic particles and the case where the third layer 3 contains inorganic particles, the particle diameter of the inorganic particles is preferably 0.5 μm or less, and the haze of the substrate 4 is preferably 1.0% or less. In addition, in the state in which the antireflection member A is formed of the base material 4, the haze of the base material 4 may be 1.0% or less. For example, even if the haze of the substrate 4 alone is about 1.0% or higher because of the adhesion of the oligomer particles on the surface of the substrate 4 or the like, as long as it is on the surface of the substrate 4 The first layer 1 is formed such that the haze of the substrate 4 becomes 1.0% or less, for example, as low as about 0.6%, which is suitable. Further, by designing the refractive indices and thicknesses of the respective layers of the first layer 1, the second layer 2, and the third layer 3 to the above-described appropriate ranges, the low minimum reflectance as described above can be achieved.

The present invention combines low reflectance characteristics with neutral hue. In other words, it is known that a conventional low-reflectance antireflection member (antireflection film) has a strong reflection color and a poor color tone. However, in the present invention, by the three layers of the first layer 1, the second layer 2, and the third layer 3, a low reflectance and a neutral color (white) can be realized. Further, the method of realizing a low reflectance and a neutral color has a method of multi-layering, but there is a disadvantage that the manufacturing cost is greatly improved, and thus it is practically unsuitable.

Further, the "neutral hue" refers to a case where light is reflected by the anti-reflection member A, and the color of the light before and after the reflection is less likely to change in hue.

[About image display machine 6]

The anti-reflection member A obtained in the present embodiment can be applied to an anti-reflection application of an image display device as described above. Will be provided by this embodiment A schematic configuration of an example of the image display device 6 of the obtained anti-reflection member A is shown in Fig. 2 .

The image display device 6 is an image display device with a touch panel, and includes a video display device 7 such as a liquid crystal display device and a touch panel 8. In FIG. 2, the touch panel 8 has a configuration in which an ITO transparent electrode 9 and a transparent adhesive sheet layer (OCA layer) 10 are alternately laminated, and this is a view schematically showing the structure of the touch panel 8. A protective layer 11 made of a glass plate, a hard resin film, or the like is formed on the outermost layer of the touch panel 8.

The anti-reflection member A obtained in the present embodiment is fixed to the surface of the image display device 7 by the touch panel 8 fixed to the image display device 6. The outer surface of the anti-reflection member A and the image display device 7 are Adhesive tape 12 is fixed. The anti-reflection member A is disposed such that the main surface of the base material 4 opposite to the first layer 1 faces the touch panel 8, and the main surface of the third layer 3 opposite to the second layer 2 faces the image display device 7.

In the image display device 6 configured in this manner, the light irradiated from the image display device 7 to the touch panel 8 is efficiently incident into the touch panel 8 by the action of the anti-reflection member A, and is touched by the touch panel 8. The reflected light will be less. Therefore, the image or image represented by the image display device 7 passes through the touch panel 8, and can be clearly seen from the outside.

The reflected light from the anti-reflection member A has a hue close to white as compared with the case of the conventional anti-reflection film, and thus the visibility of an image or the like displayed by the image display device 6 is not lowered.

Further, when the image display device 6 is externally irradiated with light such as white light, the light is reflected in the image display device 6, and the image is displayed. The visibility of images and the like displayed by the machine 6 also becomes high. In this case, the visibility of the image displayed by the image display device 6 is greatly affected by the reflection of light reflected from the surface of the anti-reflection member A facing the image display device 7, but by the same mechanism as described above, The reflected light reflected from the image display device 7 to the outside can be reduced, whereby the visibility of the image displayed by the image display device 6 becomes high.

As shown in FIG. 2, the image display device 6 can be formed by bonding the touch panel 8 and the image display device 7 via the air layer 13. Thus, by attaching the anti-reflection member A to the lower surface of the touch panel 8, light reflection at the interface between the air layer 13 and the touch panel 8 can be prevented. In this manner, the anti-reflection member A of the present invention can be mainly used for the purpose of being placed inside the image display device 6, for example, under the touch panel 8, and the like. Further, a method of removing an air layer buried between the touch panel 8 and the image display device 7 by a transparent adhesive tape or the like may be considered. However, bubbles are easily mixed during manufacture, and in the case of a large screen of 7 inches or more, Practical. As shown in FIG. 2, by attaching the anti-reflection member A to the lower surface of the touch panel 8, it is possible to achieve a low reflectance equivalent to a method of eliminating an air layer such as a transparent adhesive tape.

[Examples]

The invention will be specifically described below by way of examples.

(Example 1)

The base material was a polyester film (Cosmoshine (registered trademark) "A4300" manufactured by Toyobo Co., Ltd., which was easily processed (both sides) and had a surface reflectance of 5.1%). A hard coat layer as a first layer is formed on the surface of the polyester film which is easily treated. In the case of forming a hard coat layer, an acrylic ultraviolet curable resin ("SEIKABEAM PET-HC301" manufactured by Dairi Seiki Co., Ltd., 60% by mass of active ingredient (solid content)) was diluted with a toluene solvent to 30% by mass. A hard coating material for a hard coat layer is obtained. The hard coat material was applied onto the polyester film 1 by a bar coater #10, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form a hard coat material. Hard coating. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high-refractive-index layer, the acrylic-based ultraviolet-curable resin (SEIKABEAM MD-2 clear) manufactured by Dairi Seiki Co., Ltd., is used as an active ingredient in the total amount of the acrylic ultraviolet-curable resin and the high-refractive-index particles. (solid content: 60% by mass) 60% by mass, and titanium oxide particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) of high refractive index particles are mixed at 40% by mass to be toluene The solvent was diluted to a solid content of 5% by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer by a wire bar coater #4, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form High refractive index layer. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When a low refractive index layer is formed, a hydrolyzable alkoxysilane ("MS56S" manufactured by Mitsubishi Chemical Corporation) 0.6 relative to the total amount of the low refractive layer material is formed. % by mass, hollow cerium oxide microparticle sol ("CS60-IPA" manufactured by Nippon Chemical Co., Ltd., solvent-dispersed sol, solid content 20%) 3.2% by mass, 0.1 N nitric acid 4.6% by mass, and isopropanol 89.6 % by mass Further, 20% by mass of 2-butoxyethanol was mixed to obtain a material of a low refractive layer.

The low refractive index layer material was applied by a bar coater #4 to form a coating film having a thickness of 100 nm, and further dried at 120 ° C for 1 minute, and then dried at 120 ° C in an oxygen atmosphere. Heat treatment for 5 minutes. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 2)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer as a first layer is formed on the surface of the polyester film which is easily treated. Acrylic ultraviolet curable resin (SEIKABEAM PET-HC301, manufactured by Daisei Seiki Co., Ltd.), which is an active ingredient (solid), is obtained by the combination of the acrylic ultraviolet curable resin and the cerium oxide particles. 60% by mass), 50% by mass, cerium oxide particles ("IPA-ST" manufactured by Nissan Chemical Co., Ltd., 30% by mass of active ingredient (solid content)), mixed with 50% by mass, and isopropyl alcohol solvent It was diluted to a solid concentration of 30% to obtain a hard coat material for a hard coat layer. The hard coat material was applied onto the polyester film 1 by a bar coater #10, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form a hard coat material. Hard coating. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 3)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer as a first layer is formed on the surface of the polyester film which is easily treated. In the case of forming a hard coat layer, an acrylic ultraviolet curable resin (SEIKABEAM PET-HC301) manufactured by Daisei Seiki Co., Ltd., and an active ingredient (solid content), which are combined with the acrylic ultraviolet curable resin and titanium oxide particles. 60% by mass of 85% by mass, and titanium oxide particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) were mixed at 15% by mass, and diluted with a toluene solvent to have a solid concentration of 30% by mass. And a hard coating material for a hard coat layer is obtained. The hard coat material was applied onto the polyester film 1 by a bar coater #10, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form a hard coat material. Hard coating. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 4)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high refractive index layer, an acrylic ultraviolet curable resin ("SEIKABEAM MD-2 clear" manufactured by Daisei Seiki Co., Ltd.) is used as an active ingredient in the total amount of the acrylic ultraviolet curable resin and titanium oxide particles. 70% by mass of the titanium oxide particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) of 30% by mass of the high refractive index particles are mixed with a toluene solvent. The material was diluted to a solid content of 5% by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer by a wire bar coater #4, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form High refractive index layer. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 5)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high-refractive-index layer, the acrylic-based ultraviolet curable resin (SEIKABEAM MD-2 clear) manufactured by Dainipis Seika Co., Ltd. is an active ingredient (for the total amount of the acrylic ultraviolet curable resin and the titanium oxide particles). 60% by mass of the titanium oxide particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) of 70% by mass of the high refractive index particles, and the mixture was mixed with toluene solvent. The material was diluted to a solid content of 5% by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer by a wire bar coater #4, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form High refractive index layer. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 6)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was produced in the same manner as in Example 1 except that the thickness was set to 100 nm. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 7)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was produced in the same manner as in Example 1 except that the thickness was changed to 160 nm. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 8)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. In the formation of the low refractive index layer, the hydrolyzable alkoxymethyl decyl carbon tetrafluoride relative to the total amount of the low refractive index layer material (Momentive shares limited) "XC95-810" manufactured by the company, 0.4 mass%, hollow cerium oxide microparticle sol ("CS60-IPA" manufactured by Nippon Chemical Co., Ltd., isopropyl alcohol solvent dispersion sol, solid content 20% by mass), 3.4% by mass, 0.1 N nitric acid 4.6% by mass, isopropyl alcohol 89.6% by mass, and 2-butoxyethanol 2.0% by mass were mixed to obtain a low refractive layer material. The low refractive index layer material was applied by a bar coater #4 to form a coating film having a thickness of 100 nm, and further dried at 120 ° C for 1 minute, and then dried at 120 ° C in an oxygen atmosphere. Heat treatment for 5 minutes. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 9)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer as a first layer is formed on the surface of the polyester film which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer is formed, the hydrolyzable alkane ("MS56S" manufactured by Mitsubishi Chemical Corporation) is 1.4% by mass based on the total amount of the material of the low refractive layer, and the hollow cerium oxide microparticle sol is converted into a stock. limited Company company "CS60-IPA", solvent-dispersed sol, solid content 20% by mass) 2.4% by mass, 0.1 N nitric acid 4.6% by mass, isopropanol 89.6 mass%, and 2-butoxyethanol 2.0% by mass were mixed. Low refractive layer material. The low refractive index layer material was applied by a bar coater #4 to form a coating film having a thickness of 100 nm, and further dried at 120 ° C for 1 minute, and then dried at 120 ° C in an oxygen atmosphere. Heat treatment for 5 minutes. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Embodiment 10)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. The formation of the low refractive index layer was carried out in the same manner as in Example 1 except that the thickness was changed to 70 nm. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Example 11)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. The formation of the low refractive index layer was carried out in the same manner as in Example 1 except that the thickness was set to 110 nm. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Embodiment 12)

The same polyester film as in Example 1 was used as the substrate.

An anti-blocking layer is formed on the surface of the polyester film which is easily treated. When an anti-blocking layer is formed, an acrylic ultraviolet curable resin (manufactured by Dairi Seiki Co., Ltd., model PET-HC301, solid content: 60% by mass) and cerium oxide particles (CIK Nanotek Co., Ltd.) are blended. The amount of the cerium oxide particles (in terms of the solid content) is 15% by mass based on the total amount of the acrylic ultraviolet curable resin and the cerium oxide particles, and the amount of the cerium oxide particles is 15% by mass. The mixture was mixed to obtain an ultraviolet curable resin composition. The resin composition was applied onto a substrate by a bar coater #10, and then dried by heating at 80 ° C for 5 minutes, and then irradiated with ultraviolet rays under conditions of 500 mJ/cm ² to be cured.

The polyester film was formed as a hard coat layer as a first layer on the side which was easily treated (the side on which the anti-blocking layer was not formed). When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, the anti-blocking layer was obtained, and an anti-reflection member having a structure of a sequential laminated substrate, a hard coat layer, a high refractive index layer, and a low refractive index layer was obtained.

(Example 13)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. In the case of forming a hard coat layer, an acrylic ultraviolet curable resin (SEIKABEAM PET-HC301, manufactured by Dairi Seiki Co., Ltd., active ingredient (solid content) 60% by mass), 97 parts by mass, methacryl 3 parts by mass of decyloxydecane (manufactured by Shin-Etsu Chemical Co., Ltd., 3-methacryloxypropyltrimethoxydecane, model KBM-503) was obtained to obtain a hard coat material for a hard coat layer. The hard coat material was applied onto the polyester film 1 by a bar coater #10, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form a hard coat material. Hard coating. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high refractive index layer, 60 parts by mass of an active ingredient (solid content) (60% by mass) of "acrylic ultraviolet curable resin (SEIKABEAM MD-2 clear" manufactured by Dairi Seiki Co., Ltd.) is blended. Titanium oxide particles of high refractive index particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) 40 parts by mass, methacryloxydecane (manufactured by Shin-Etsu Chemical Co., Ltd., 3) -Methyl propylene methoxy propyl trimethoxy decane, model KBM-503) 3 parts by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer by a wire bar coater #4, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form High refractive index layer. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer is formed, the hydrolyzable alkoxysilane ("MS56S" manufactured by Mitsubishi Chemical Corporation) is 0.6% by mass of the total amount of the material of the low refractive layer, and the hollow cerium oxide microparticle sol is formed. Co., Ltd. "CS60-IPA", solvent dispersion sol, solid content 20%) 3.2 The mass%, 0.1 N nitric acid 4.6% by mass, isopropyl alcohol 89.6% by mass, and 2-butoxyethanol 2.0% by mass were mixed to obtain a low refractive layer material. The low refractive index layer material was applied by a bar coater #4 to form a coating film having a thickness of 100 nm, and further dried at 120 ° C for 1 minute, and then dried at 120 ° C in an oxygen atmosphere. Heat treatment for 5 minutes. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Examples 14 to 16)

In the thirteenth embodiment, the first layer, the second layer and the third layer were formed, and the thickness thereof was as disclosed in the table below. Thereby, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer was obtained.

(Example 17)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer as a first layer is formed on the substrate which is subjected to an easy-to-treat treatment. In the case of forming a hard coat layer, an acrylic ultraviolet curable resin ("SEIKABEAM PET-HC301" manufactured by Dairi Seiki Co., Ltd., 60% by mass of active ingredient (solid content)) was diluted with a toluene solvent to 30% by mass. A hard coat material for a hard coat layer is obtained. The hard coat material was applied onto the polyester film 1 by a bar coater #10, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form a hard coat material. Hard coating. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer and a low refractive index layer were formed by the same means as in the case of Example 13.

The refractive index and thickness of the high refractive index layer and the low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Embodiment 18)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer was formed on the substrate which was subjected to the easy-to-treat treatment in the same manner as in Examples 13 to 16. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer was formed on the hard coat layer in the same manner as in Example 1. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer was formed in the same manner as in Examples 13 to 16. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Embodiment 19)

The same polyester film as in Example 1 was used as the substrate.

On the side of the substrate that is easily processed, and the embodiment 13~ 16 The same means sequentially forms a hard coat layer and a high refractive index layer. The refractive index and thickness of the hard coat layer and the high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. The low-refractive-index layer is formed by blending fluorine-containing acrylate ("LINC-3A" manufactured by Kyoeisha Chemical Co., Ltd., active ingredient (solid content) 100% by mass), 57 parts by mass, hollow cerium oxide microparticles. 40 parts by mass of a sol ("CS60-IPA", a solvent-dispersed sol, a solid component of 20%) manufactured by Nippon Chemical Co., Ltd., and a photopolymerization initiator (IRGACURE 184, manufactured by BASF Corporation), active ingredient (solid content) 100% by mass) 3 parts by mass to obtain a low refractive index layer material. The low refractive index layer material was applied by a wire bar coater #4 to form a coating film, which was further allowed to stand at 120 ° C for 1 minute, and dried, and then heat treated at 120 ° C in an oxygen atmosphere. 5 minutes. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Examples 20 to 34)

In Embodiment 13, the refraction of the first layer, the second layer, and the third layer is performed by adjusting the blending ratio of the components in the materials required to form the first layer, the second layer, and the third layer. The rate is adjusted as shown in the table below. Further, the thicknesses of the respective layers of the first layer, the second layer, and the third layer are adjusted as shown in the following table.

Further, anti-adhesion was formed in the same manner as in the case of Example 12. Floor.

From the above process, an anti-reflection member having an anti-adhesion layer, a structure having a sequential laminated substrate, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Comparative Example 1)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a hard coat layer as a first layer on the side which is easily treated. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. When the high refractive index layer was formed, the same procedure as in Example 1 was carried out except that the thickness was set to 83 nm. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. The formation of the low refractive index layer was carried out in the same manner as in Example 1 except that the thickness was set to 100 nm. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Comparative Example 2)

The same polyester film as in Example 1 was used as the substrate.

The polyester film is formed as a first layer on the easy-to-handle side Hard coating. When the hard coat layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high-refractive-index layer, an acrylic ultraviolet-curable resin (SEIKABEAM MD-2 clear) manufactured by Daisei Seiki Co., Ltd., is used as an active ingredient in combination with an acrylic ultraviolet curable resin and high refractive index particles. (solid content: 60% by mass) of 75 mass%, and titanium oxide particles ("760T" manufactured by Tayca Co., Ltd., dispersing solvent: toluene, solid content: 48% by mass) of high refractive index particles are mixed at 25 mass%, and The toluene solvent was diluted to a solid content of 5% by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer by a wire bar coater #4, dried at 80 ° C for 5 minutes, and then hardened by UV irradiation (500 mJ/cm ² ) to form High refractive index layer. The refractive index and thickness of this high refractive index layer are disclosed in the table below.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Comparative Example 3)

The same polyester film as in Example 1 was used as the substrate.

A hard coat layer as a first layer is formed on the surface of the polyester film which is easily treated. When the hard coat layer is formed, the same method as in the first embodiment is used. To proceed. The refractive index and thickness of this hard coat layer are disclosed in the table below.

Next, a high refractive index layer as a second layer is formed on the hard coat layer. In the case of forming a high-refractive-index layer, an acrylic ultraviolet-curable resin (SEIKABEAM MD-2 clear) manufactured by Daisei Seiki Co., Ltd., is used as an active ingredient in combination with an acrylic ultraviolet curable resin and high refractive index particles. (solid content: 60% by mass), 22% by mass, and titanium oxide particles ("760TC, dispersion solvent: toluene, solid content: 48% by mass") of high refractive index particles, 78% by mass, and mixed with toluene solvent Diluted into a solid content of 5% by mass to obtain a high refractive index layer material. The high refractive index material was coated on a hard coat layer by a bar coater #4, and dried at 80 ° C for 5 minutes. The high refractive index layer was formed by hardening by UV irradiation (500 mJ/cm ² ), and the refractive index and thickness of the high refractive index layer are disclosed in the following table.

Next, a low refractive index layer as a third layer is formed on the high refractive index layer. When the low refractive index layer was formed, it was carried out in the same manner as in Example 1. The refractive index and thickness of this low refractive index layer are disclosed in the table below.

From the above process, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer can be obtained.

(Comparative examples 4 and 5)

In the thirteenth embodiment, the first layer, the second layer and the third layer were formed, and the thickness thereof was as disclosed in the following table. Thereby, an antireflection member having a structure of a sequentially laminated base material, a hard coat layer, a high refractive index layer, and a low refractive index layer was obtained.

The antireflection members of the above respective examples and comparative examples were evaluated for the following items.

[Haze measurement]

The haze of each antireflection member was measured using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., model NDH2000).

[Measurement of total light transmittance]

The total light transmittance of each of the anti-reflection members was measured using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., model NDH2000).

[Minimum reflectance measurement]

The reflectance of light rays in the wavelength range of 380 to 800 nm of each antireflection member was measured using a spectrophotometer [manufactured by Hitachi HighTechnologies Co., Ltd., model U-4100). Based on this, the wavelength of the light (the minimum reflectance wavelength) at which the reflectance becomes minimum and the reflectance of the light at the minimum reflectance wavelength are derived.

[Average visual reflectance]

The back surface of each of the anti-reflection members was blackened, and a measuring apparatus was used with a spectrophotometer (manufactured by Hitachi High-Technologies Co., Ltd., model U-4100), and a light source was used as a light source, and a spectral reflectance of positive reflection of 5° was measured based on JIS R3106. Thereby, the average visual reflectance is derived from the obtained results.

[Transmission color evaluation]

Light from a standard C light source specified by the CIE is incident from the low refractive index layer side to each of the anti-reflection members, and a* in the CIE 1976 L*a*b* color space for the color of the transmitted light penetrating the anti-reflection member b*, measured by a spectrophotometer manufactured by Konica-Minolta Co., Ltd., model CM3600D.

[reflection color evaluation]

Light from a standard C light source defined by the CIE is incident on each of the anti-reflection members from the side of the low refractive index layer. In this case, L*, a*, and b* in the CIE 1976L*a*b* color space of the color of the reflected light from the anti-reflection member in the 10° field of view are measured by Konica-Minolta Co., Ltd. Color meter, model CM3600D for measurement.

In addition, the excellent difference (=((L*) ² +(a*) ² +(b*) ² ) ^1/2 )) is calculated based on L*, a*, and b* derived therefrom.

In addition, the smaller the value of this color difference, the more the tone of the light can be rated as neutral.

[Reflection color evaluation (with ITO film)]

An ITO film was prepared which was composed of an ITO film having a thickness of 20 nm and a PET film having a thickness of 188 μm superposed thereon. This ITO film was bonded to the substrate of each antireflection member by an acrylic adhesive.

Light from a standard C light source defined by the CIE was incident from the low refractive index layer side to the antireflection member on which the ITO film was superposed. In this case, the CIE of the color of the reflected light from the 10° field of view of the anti-reflection member L*, a*, and b* in the 1976 L*a*b* color space were measured by a spectrophotometer manufactured by Konica-Minolta Co., Ltd., model CM3600D.

In addition, the excellent difference (:((L*) ² +(a*) ² +(b*) ² ) ^1/2 ) is calculated based on L*, a*, and b* derived therefrom.

[Scratch resistance evaluation]

Using a surface tester (Type 14FW, manufactured by Shinto Scientific Co., Ltd.), steel wool #0000 was pressed on the low refractive index layer of the antireflection member with a load of 250 g, and the low refractive index layer was rubbed with the steel wool #0000. The surface is 10 times. Next, the surface of the low refractive index layer was visually observed for scratches. As a result, the case where the significant scratch was observed was evaluated as "A", and the case where no significant scratch was observed was evaluated as "B".

[Adhesion evaluation after durability test]

Each of the anti-reflection members was placed in a constant temperature and humidity chamber at a temperature of 85 ° C and a humidity of 85% for 72 hours. Next, a checkerboard tape peeling test was performed for each of the antireflection members in accordance with JIS D0202:1988. Adhesive tape was made of cellophane tape CT24 made by Nichiban Co., Ltd. As a result of this test, the case where no peeling occurred was rated as "A", and the case where peeling occurred was rated as "B".

The above results are disclosed in the tables below.

Further, in the table to be described later, the composition "A" of the low refractive index layer means that the hydrolyzable alkane and the hollow cerium oxide particles are blended in the material of the low refractive index layer. The composition "B" means that fluorine-containing acrylate and hollow cerium oxide particles are blended in the low refractive index layer material.

As is apparent from the foregoing table, in Examples 1 to 34, compared with Comparative Examples 1 to 3, the minimum reflectance or the average visual reflectance was small, and the reflection property was low. Further, in Examples 1 to 34, compared with Comparative Examples 1 to 5, the deviations of a* and b* or the reflection color a* and b* of the transmission color were small, and the color tone was neutral.

Among them, in Examples 1 to 13 and 15 to 28, the color of the reflected light when the antireflection member was used alone was particularly neutral.

Further, in Examples 1 to 5.7 to 9.11 to 21 and 29 to 34, when the antireflection member overlaps with the ITO film, the color of the reflected light has a neutral color tone.

As shown in FIG. 3, in Example 1, compared with Comparative Example 1, the reflectance was less changed with the wavelength. That is, among the long wavelength region (wavelength region higher than about 600 nm) and the short wavelength region (wavelength region lower than about 500 nm), the reflectance of the embodiment is smaller than that of the comparative example. On the other hand, among the medium wavelength regions (wavelength regions between about 500 and 600 nm), the reflectance of the examples was slightly higher than that of the comparative examples. Therefore, the reflectance of the embodiment is small as compared with the reflectance of the comparative example throughout the short-wavelength region to the long-wavelength region, and this result represents that the neutralization of the reflected color can be achieved.

A‧‧‧Anti-reflection member

1‧‧‧ first floor

2‧‧‧ second floor

3‧‧‧ third floor

4‧‧‧Substrate

5‧‧‧Anti-adhesion layer

Fig. 1 is a schematic cross-sectional view showing an example of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view showing an example of a video display device including the antireflection member of the present invention.

Fig. 3 is a graph showing changes in reflectance with wavelengths of Examples and Comparative Examples.

A‧‧‧Anti-reflection member

1‧‧‧ first floor

2‧‧‧ second floor

3‧‧‧ third floor

4‧‧‧Substrate

5‧‧‧Anti-adhesion layer

Claims (14)

An antireflection member comprising a polyester substrate, a first layer, a second layer, and a third layer, wherein the elements are laminated in the above-described order, and the refractive index of the first layer is in a range of 1.52 or more and 1.65 or less. The refractive index of the second layer is in the range of 1.67 or more and 1.80 or less, and the thickness thereof is in the range of 100 nm or more and 180 nm or less, and the refractive index of the third layer is in the range of 1.30 or more and 1.45 or less, and the thickness thereof is 70 nm or more and 130 nm or less. The scope. The antireflection member according to claim 1, wherein the thickness of the first layer is in a range of 0.5 μm or more and 10.0 μm or less. The anti-reflection member according to claim 1, wherein a* in the CIE 1976L*a*b* color space of the transmission color generated by the standard C light source is in a range of -0.5 or more and 0.0 or less, and b* is 0.2 or more and 0.8 or less. The range of CIE in the CIE 1976L*a*b* color space of the standard C light source is in the range of -8.0 or more and 9.0 or less, and b* is in the range of -9.0 or more and 3.0 or less. The antireflection member according to claim 1, wherein the thickness of the second layer is in a range of 100 nm or more and 160 nm or less, and the thickness of the third layer is in a range of 70 nm or more and 110 nm or less. The antireflection member of claim 4, wherein the thickness of the first layer is in the range of 1.0 μm or more and 10.0 μm or less. The anti-reflection member of claim 4, wherein the a* in the CIE 1976L*a*b* color space of the transmission color produced by the standard C light source is in the range of -0.5 or more and 0.0 or less, and b* is 0.2 or more and 0.8 or less. Scope The reflection color produced by the quasi-C light source has a range of a* in the CIE 1976L*a*b* color space of 0.0 or more and 9.0 or less, and b* is in the range of -9.0 or more and 0.0 or less. The antireflection member according to claim 1, wherein the thickness of the second layer is in a range of 130 nm or more and 180 nm or less, and the thickness of the third layer is in a range of 80 nm or more and 130 nm or less. An anti-reflection member according to claim 7 wherein the a* in the CIE 1976L*a*b* color space of the transmission color produced by the standard C light source is in the range of -0.5 or more and 0.0 or less, and b* is 0.2 or more and 0.8 or less. The range of CIE in the CIE 1976L*a*b* color space of the standard C light source is in the range of -8.0 or more and 2.0 or less, and b* is in the range of -6.0 or more and 3.0 or less. The antireflection member according to claim 1, wherein the minimum reflectance is 0.5% or less, the average visual reflectance is 0.7% or less, and the total light transmittance is 94% or more. The antireflection member of claim 1, wherein the first layer contains a cured product of a first ultraviolet curable resin, and the cured product of the first ultraviolet curable resin contains an alkoxy group having a reactive organic functional group. At least one of decane and a partially hydrolyzed polymer thereof, wherein the second layer contains a cured product of a second ultraviolet curable resin, and the cured product of the second ultraviolet curable resin contains an alkoxy group having a reactive organic functional group. At least one of decane and a partially hydrolyzed polymer thereof, wherein the third layer is derived from alkoxysilane and a partially hydrolyzed polymer thereof At least one hardened material is composed of cerium oxide. The antireflection member according to claim 10, wherein a ratio of the alkoxysilane and the partially hydrolyzed polymer in the first ultraviolet curable resin to the first layer is 3% by mass or more. The antireflection member according to claim 10, wherein the ratio of the alkoxysilane and the partially hydrolyzed polymer thereof in the second ultraviolet curable resin to the second layer is 3% by mass or more. The antireflection member of claim 1, wherein the third layer comprises a polymer of a mixture of an alkoxydecane and an alkoxysilane having a fluorocarbon skeleton and hollow ceria particles. The antireflection member of claim 1, further comprising an anti-adhesion layer laminated on a surface of the substrate opposite to the first layer.