JP2020095092A - Optical laminate, manufacturing method of optical laminate, lamination member and display device - Google Patents

Abstract

To provide an optical laminate excellent in antiglare properties and scratch resistance, excellent in image sharpness from a bright viewing distance when used in a display device, and appropriately used as an antiglare member composing an outermost surface of a touch panel, and also to provide a manufacturing method of an optical laminate, a lamination member having an optical laminate and a display device.SOLUTION: An optical laminate 100 includes a resin layer 2 containing a binder resin 3 and organic particles 4 at least on one side of a transparent base material 1. The resin layer has a rugged shape on a top face thereof. The organic particle particles are not exposed on the top face of the resin layer. In the resin layer, thickness t of the binder resin present closer to the top face than the organic particles is 0.5 μm or more. The number of organic particles included in a range of 0.1 mm×0.1 mm is 20 or more when the resin layer is observed from the top face, and transmission image sharpness with an optical comb having a width of 2.0 mm is 20.0-55.0%, measured in compliance with JIS K7374:2007.SELECTED DRAWING: Figure 1

Description

The present invention relates to an optical layered body, a method for manufacturing the optical layered body, a layered member, and a display device.

In display devices such as mobile information terminal devices, PC monitors, and TV monitors, an antiglare film is installed closer to the viewer than the display element for the purpose of preventing reflection of external light. Sometimes. As the antiglare film, there is known a film in which a transparent support is provided with an antiglare layer containing a binder and translucent fine particles and having an uneven surface.
For example, in Patent Document 1, an antiglare layer containing a binder and translucent fine particles is provided on a support, and the average particle diameter of the translucent fine particles is 3 μm or more and 15 μm or less, and the transparency in the antiglare layer is The content of the light-transparent fine particles is 0.1% by mass or more and 1.0% by mass or less based on the total solid content of the antiglare layer, and the translucent fine particles are grounded at the support-side interface of the antiglare layer to transmit light. There is disclosed an optical film in which substantially no functional fine particles are stacked in multiple layers in the thickness direction of the antiglare layer. It is described that the optical film has good black reproducibility and antiglare property, has no point defects due to uneven interference and coarse particles, and has excellent adhesion to the antiglare layer.
Further, the antiglare layer is formed by laminating a layer composed of a coating composition containing a binder and translucent fine particles and a layer composed of a coating composition containing the binder but not translucent fine particles (overcoat layer). It is also disclosed that it can be formed by.

JP, 2011-186008, A

In recent years, in mobile type information terminal devices equipped with a touch panel, development of an antiglare member that can substitute for the cover glass that constitutes the outermost surface of the touch panel has been promoted. However, Patent Document 1 does not disclose such an antiglare member.
Applications of the antiglare optical film disclosed in Patent Document 1 are a protective film for a polarizing film used in a liquid crystal TV and an antiglare film used by being attached to a cover glass on the surface of a display. On the other hand, the cover glass substitute member that constitutes the outermost surface of the touch panel needs to have sufficient scratch resistance that can be repeatedly used in applications such as operating a display screen by touching a finger or a touch pen.

When an overcoat layer is provided on a layer containing a binder and translucent fine particles, like the antiglare layer of the antiglare optical film disclosed in Patent Document 1, the antiglare property is reduced accordingly. .. However, if the antiglare property is increased, there is a problem that the image clarity is deteriorated.
Among display devices, TV monitors are prioritized to improve image quality, and in particular, image clarity when viewing a screen from a long distance and a wide viewing angle is important. Further, since the TV monitor is mainly used indoors, the anti-glare property may be imparted within the range in which high image quality can be maintained. On the other hand, in the case of a mobile information terminal device equipped with a touch panel, the touch panel is operated while looking at the display screen at hand, so an image when viewed from a distance (clear viewing distance) of about 30 cm from the display screen. The most important thing is to be clear. Further, since mobile type information terminal equipment is frequently used outdoors, a high level of antiglare property is essential to reduce the reflection of external light, and it is necessary for display devices used indoors. Performance was not sufficient with the permeable film.

The present invention has been made in such a situation, excellent in antiglare property, scratch resistance, when applied to a display device, excellent in image clarity from near the visual distance, the outermost surface of the touch panel. An object of the present invention is to provide an optical layered body that is preferably used as an antiglare member to be configured, a method for manufacturing the optical layered body, and a layered member and a display device including the optical layered body.

As a result of intensive studies to solve the above problems, the present inventors have found that in an optical laminate having a resin layer containing a binder resin and organic particles on at least one surface of a transparent substrate, the resin layer has a predetermined configuration. Further, they have found that an optical layered body satisfying a predetermined transmitted image sharpness can solve the above problems, and have completed the present invention.
That is, the present invention provides the following optical laminates [1] to [4], a method for producing the optical laminate, a laminate member, and a display device.

[1] An optical layered body having a resin layer containing a binder resin and organic particles on at least one surface of a transparent substrate, wherein the resin layer has an uneven shape on its upper surface, and the upper surface of the resin layer has The organic particles are not exposed, and the thickness of the binder resin existing on the upper surface side of the organic particles in the resin layer is 0.5 μm or more. The number of the organic particles contained in the range of 1 mm×0.1 mm is 20 or more, and the transmitted image clarity when the width of the optical comb is 2.0 mm, which is measured according to JIS K7374:2007, is 20.0. The optical laminated body, which is ˜55.0%.
[2] A laminated member having the optical laminated body according to the above [1] and a polarizing element.
[3] An antiglare resin layer is formed on the transparent substrate using a coating liquid containing the binder resin or its precursor and the organic particles, and then the binder resin or the binder resin is formed on the antiglare resin layer. The optical laminate according to the above [1], which has a step of forming a surface resin layer using a coating liquid containing a precursor and not containing the organic particles, and forming the resin layer on the transparent substrate. Body manufacturing method.
[4] A display device provided with the optical laminate according to [1] above or the laminate member according to [2] above on the viewer side of the display device.

The optical layered body of the present invention is excellent in antiglare property, scratch resistance, and, when applied to a display device, is excellent in image clarity from the vicinity of the clear viewing distance, and thus is particularly used for the outermost surface of a touch panel display device. It is suitable as an antiglare member.

It is a cross-sectional schematic diagram which shows an example of the optical laminated body of this invention.

[Optical layered product]
The optical layered body of the present invention is an optical layered body having a resin layer containing a binder resin and organic particles on at least one surface of a transparent substrate. The resin layer has an uneven shape on its upper surface, the organic particles are not exposed on the upper surface of the resin layer, and the thickness of the binder resin present on the upper surface side of the organic particles in the resin layer. Is 0.5 μm or more, and the number of the organic particles contained in the range of 0.1 mm×0.1 mm when observing the resin layer from the upper surface is 20 or more, according to JIS K7374:2007. It is characterized in that the measured transmission image clarity is 2.0 mm to 55.0% when the width of the optical comb is 2.0 mm. Here, the “upper surface of the resin layer” means a surface of the resin layer on the side opposite to the interface with the transparent substrate.

FIG. 1 is a schematic sectional view showing an example of the optical layered body of the present invention. The optical layered body 100 of the present invention shown in FIG. 1 has a resin layer 2 on one surface of a transparent substrate 1, and the resin layer 2 contains a binder resin 3 and organic particles 4. The resin layer 2 has an uneven shape on its upper surface 2a. The concavo-convex shape is preferably a shape that follows the organic particles 4 contained in the resin layer 2.
The organic particles 4 are not exposed on the upper surface 2a of the resin layer. That is, in the resin layer 2, the upper surface 2a of the resin layer is covered with the binder resin 3, and the organic particles 4 are present closer to the transparent substrate 1 than the upper surface 2a of the resin layer. In addition, the thickness of the binder resin existing on the upper surface side of the organic particles 4 in the resin layer 2 is represented by t in FIG. 1, and t is 0.5 μm or more.

The optical layered body of the present invention, having the above-mentioned constitution, is excellent in antiglare property and scratch resistance, and when applied to a display device, it is excellent in image sharpness when viewed from near the clear viewing distance.
Conventionally, in the field of antiglare films, scratch resistance of the film surface has been evaluated based on the surface hardness. However, in the anti-glare film that constitutes the outermost surface of the touch panel, since a finger or a touch pen is brought into contact with the surface of the anti-glare film, it is sufficient to improve the surface hardness of the film (for example, the pencil hardness of the surface). It turned out that sex could not be obtained. Further, the present inventors have found that the results of the surface hardness of the film and the evaluation of whether the surface is likely to be scratched when a force is applied to the film surface in the horizontal direction do not always match. .. For example, there is known a method of providing a clear hard coat layer between a transparent substrate and an antiglare layer in order to achieve both antiglare property and pencil hardness in an antiglare film (for example, International Publication No. WO 2008/020613). See). When the clear hard coat layer is located inside (the transparent substrate side) of the antiglare layer, the antiglare property of the antiglare film is not hindered by the clear hard coat layer. You can exercise your sexuality. Since the pencil hardness is affected not only by the hardness of the surface but also by the hardness of the base, the pencil hardness can be improved by using the antiglare film having the above structure. However, even if the antiglare film has the above-mentioned structure, it has no effect on the durability when the film surface is rubbed by applying a force in the horizontal direction, so that the pencil hardness can be improved, but the steel wool resistance is improved. I couldn't let it go.
Therefore, the present inventors have diligently studied not only to improve the surface hardness of the optical layered body having the antiglare property, but also to make the surface scratch-resistant even by the steel wool resistance test. The present invention has led to the completion of the optical laminate.

Further, in general, as the antiglare property is improved, the image sharpness tends to decrease. Therefore, in the case where the image clarity when viewed from a distance from the display screen is prioritized as in a TV monitor, for example, the antiglare property has to be sacrificed to some extent. On the other hand, a mobile type information terminal device equipped with a touch panel is frequently used outdoors, and therefore a high level of antiglare property is essential in order to reduce reflection of external light. In addition, since the touch panel is operated while looking at the display screen at hand, image clarity when viewing the display screen from a long distance is not required, and image clarity when viewing from near the clear viewing distance is optimized. It is important to.
Focusing on the above points, the optical layered body of the present invention achieves the optimum antiglare property and image clarity at the same time as an antiglare member that is particularly a substitute for a cover glass of a touch panel.

The reason why the optical layered body of the present invention exerts the above effects can be explained as follows.
First, in the optical layered body of the present invention, the resin layer has a structure containing a binder resin and organic particles, and the resin layer has an uneven shape on its upper surface, whereby good antiglare properties can be imparted. Further, from the viewpoint of antiglare property, it is preferable that the resin layer has a thickness portion that exceeds the average particle diameter of the organic particles and a thickness portion that is less than the average particle diameter of the organic particles. This will be described in detail later.
The organic particles are not exposed on the upper surface of the resin layer, and the number of organic particles contained in the range of 0.1 mm×0.1 mm when the resin layer is observed from the upper surface side is 20 or more. .. When the organic particles are exposed on the upper surface of the resin layer, not only the organic particles are likely to fall off from the resin layer but also easily scratched particularly in the steel wool resistance test, and the optical layered body having the resin layer has a touch panel display. It is not suitable for use on the outermost surface of the device. However, if the organic particles are covered with the binder resin without being exposed on the upper surface of the resin layer, the surface will not be scratched even after a steel wool resistance test of 1500 round trips or more, and the surface of the touch panel display device will not be damaged. High scratch resistance that can be practically used even when used can be imparted. On the other hand, when the organic particles are embedded in the resin layer, the antiglare property tends to decrease, but by setting the number of organic particles in the resin layer to the above range, excellent antiglare property and scratch resistance are obtained. It can be compatible with sex.
Furthermore, in the optical layered body of the present invention, when the width of the optical comb is 2.0 mm and the transmitted image clarity is in the range of 20.0 to 55.0%, the optical layered body of the present invention is used as a display device. When installed on the surface, the image clarity is good when the display screen is viewed from the vicinity of the clear viewing distance, and the balance between the antiglare property and the scratch resistance is optimal.

In the present specification, the number of organic particles in the optical layered body and the optical physical properties (total light transmittance, haze, image clarity, etc.) exclude the minimum value and the maximum value of 16 measurement values unless otherwise specified. It means the average value of the measured values at 14 points.
In the present specification, the 16 measurement points are the area 1 cm from the outer edge of the measurement sample as a margin, and the area inside the margin, when a line that divides the longitudinal direction and the lateral direction into 5 equal parts is drawn, It is preferable to set 16 points of intersection as the center of measurement. For example, in the case where the measurement sample is a quadrangle, the area 1 cm from the outer edge of the quadrangle is used as a margin, and the area inside the margin is measured centering on 16 points of intersections of the dotted lines that are divided into 5 parts in the vertical and horizontal directions. It is preferable to calculate the parameter with the average value. When the measurement sample has a shape other than a quadrangle such as a circle, an ellipse, a triangle, or a pentagon, it is preferable to draw a quadrangle inscribed in these shapes and measure the quadrangle at 16 points by the above method.

Hereinafter, members constituting the optical layered body of the present invention will be described.
<Transparent substrate>
The transparent base material used for the optical layered body of the present invention is preferably one having optical transparency, smoothness, heat resistance, and excellent mechanical strength. Examples of the resin material constituting such a transparent substrate include polyester, acrylic, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyether sulfone, polysulfone, polypropylene, polymethylpentene. Examples of the plastic film include polyvinyl chloride, polyvinyl acetal, polyether ketone, polycarbonate, polyurethane, amorphous olefin (Cyclo-Olefin-Polymer: COP), and may be a mixture of a plurality of resins. The transparent substrate may be a laminate of two or more plastic films.
Among the above, TAC and acrylic are preferable from the viewpoint of light transmission and optical isotropy. Further, COP and polyester are preferable because they are excellent in weather resistance. Further, when it is desired to impart foldability, polyimide, polyamide imide, COP and the like are preferable. From the viewpoint of mechanical strength and dimensional stability, stretched polyester, particularly biaxially stretched polyester (polyethylene terephthalate, polyethylene naphthalate) is preferable. In addition, in this specification, "acrylic" means acrylic and/or methacrylic.

The thickness of the transparent substrate is preferably 5 to 300 μm, more preferably 10 to 200 μm. When the thickness of the laminate or the display device itself is made thin and the foldability is important, the thickness is more preferably 10 to 80 μm.
On the surface of the transparent base material, in order to improve the adhesiveness, a physical treatment such as a corona discharge treatment or an oxidation treatment, or a coating called an anchor agent or a primer may be applied in advance.

<Resin layer>
The resin layer included in the optical layered body of the present invention is a layer containing a binder resin and organic particles and functioning as an antiglare layer.
The resin layer has an uneven shape on the upper surface thereof, which can impart good antiglare properties. The concavo-convex shape is preferably a shape that follows the shape of the organic particles contained in the resin layer. The resin layer having such an uneven shape can be formed by applying a coating solution containing a binder resin or its precursor and organic particles on the transparent substrate. As a coating method, known coating methods such as gravure coating and bar coating can be used. The coating film obtained by applying the coating liquid can be dried and cured as necessary to form a resin layer having an uneven shape.
Here, when the binder resin is a cured product of a curable resin composition, the "precursor of the binder resin" means the curable resin composition.

The optical layered body of the present invention may be any one as long as it has the above-mentioned predetermined resin layer having an uneven shape on the upper surface on at least one surface of the transparent base material and has light transmittance. The resin layer may be provided on both sides of the transparent substrate, but from the viewpoints of handleability and image clarity, the transparent substrate has the resin layer having an uneven shape on one side thereof and the other side thereof. Is preferably substantially smooth.

The resin layer has 20 or more organic particles contained in a range of 0.1 mm×0.1 mm when observed from the upper surface. When the organic particles are embedded in the resin layer, the antiglare property tends to decrease, but by setting the number of the organic particles in the resin layer in the above range, excellent antiglare property and scratch resistance can be obtained. Can be compatible. The number of the organic particles is preferably 25 or more, more preferably 30 or more, from the viewpoint of exhibiting high antiglare property, and preferably 50 or less, or more from the viewpoint of balance with image clarity. It is preferably 45 or less.
The number of the above-mentioned organic particles in the resin layer can be measured by observing with an optical microscope, and specifically can be measured by the method described in Examples.

The resin layer preferably has an antiglare resin layer and a surface resin layer in this order from the transparent substrate side. The antiglare resin layer contains the organic particles, and the surface resin layer contains no organic particles. With such a configuration, the entire upper surface of the antiglare resin layer containing organic particles can be covered with the surface resin layer, so that the organic particles can be prevented from being exposed on the upper surface of the resin layer. Further, since it is easy to adjust the thickness of the binder resin constituting the upper surface of the resin layer, it is preferable from the viewpoint of easily adjusting the balance between the antiglare property and the scratch resistance. Furthermore, when the resin layer has a structure having an antiglare resin layer and a surface resin layer, the organic particles present in the resin layer can be arranged on the transparent substrate side, so that the uneven shape formed is random. In addition, the in-plane uniformity of the optical characteristics of the resin layer can be improved.
The binder resin contained in the antiglare resin layer and the binder resin contained in the surface resin layer may be the same or different, but when these layers are laminated, there is little interfacial reflection and excellent adhesion. It is preferable that the same binder resin is included. In the present invention, "containing the same kind of binder resin" means that the binder resin forming the antiglare resin layer and the binder resin forming the surface resin layer are wholly or partially overlapped. Further, from the viewpoint of reducing the above-mentioned interface reflection, it is preferable that the difference in refractive index between the binder resin forming the antiglare resin layer and the binder resin forming the surface resin layer is small. For example, the difference in refractive index is 0.02 or less. Preferably.

The antiglare resin layer preferably contains the binder resin and organic particles, and further contains inorganic fine particles described later. On the other hand, the surface resin layer preferably contains the binder resin and the below-mentioned fluorine-containing compound, and preferably does not contain any particles. When the surface resin layer does not contain particles, scratch resistance is further improved. In addition, since the surface resin layer does not contain the above-mentioned inorganic fine particles, fine irregularities derived from the fine particles are not formed, so that the image clarity at a clear viewing distance becomes good.

(Binder resin)
The binder resin contained in the resin layer is preferably a cured product of the curable resin composition from the viewpoint of mechanical strength.
The curable resin composition may be a thermosetting resin composition or an ionizing radiation curable resin composition, and an ionizing radiation curable resin composition is preferable from the viewpoint of improving mechanical strength. That is, the binder resin contained in the resin layer is more preferably a cured product of the ionizing radiation curable resin composition.

The thermosetting resin composition is a composition containing at least a thermosetting resin and is a resin composition that is cured by heating.
Examples of the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, and silicone resin. In the thermosetting resin composition, a curing agent is added to these curable resins as needed.

The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as “ionizing radiation curable compound”). Examples of the ionizing radiation-curable functional group include (meth)acryloyl group, vinyl group, ethylenically unsaturated bond group such as allyl group, epoxy group, and oxetanyl group. As the ionizing radiation curable compound, a compound having an ethylenically unsaturated bond group is preferable, a compound having two or more ethylenically unsaturated bond groups is more preferable, and among them, having two or more ethylenically unsaturated bond groups, A polyfunctional (meth)acrylate compound is more preferable. As the polyfunctional (meth)acrylate compound, either a monomer or an oligomer can be used.
In addition, in this specification, "(meth)acrylate" refers to methacrylate and acrylate.
Further, in the present specification, ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule, and usually an ultraviolet ray (UV) or an electron beam (EB) is used. However, electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion rays can also be used.

Among the polyfunctional (meth)acrylate compounds, the bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, polyalkylene glycol di(meth)acrylate, 1, 6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, bisphenol A tetraethoxy di(meth)acrylate, bisphenol A tetrapropoxy di(meth)acrylate, isocyanuric acid di(meth)acrylate, etc. Is mentioned.
Examples of trifunctional or higher functional (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, pentaerythritol tetra(meth)acrylate (PETTA). ), dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, isocyanuric acid-modified tri(meth)acrylate, and the like.
Further, the (meth)acrylate-based monomer may be one in which a part of the molecular skeleton is modified, and is modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like. It can also be used.

Examples of the polyfunctional (meth)acrylate oligomer include acrylate polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate.
Urethane (meth)acrylate is obtained by, for example, reacting a polyhydric alcohol and an organic diisocyanate with hydroxy (meth)acrylate.
A preferable epoxy (meth)acrylate is a (meth)acrylate obtained by reacting a trifunctional or higher functional aromatic epoxy resin, an alicyclic epoxy resin, an aliphatic epoxy resin or the like with (meth)acrylic acid, and a bifunctional bifunctional epoxy resin. (Meth)acrylate obtained by reacting the above aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with a polybasic acid and (meth)acrylic acid, and a bifunctional or higher functional aromatic epoxy resin, It is a (meth)acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin and the like with phenols and (meth)acrylic acid.

In addition, as ionizing radiation curable compounds having only one ethylenically unsaturated bond group, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, ethylhexyl (meth)acrylate, polyalkylene glycol (meth) Acrylate, styrene, methylstyrene, N-vinylpyrrolidone and the like can also be used.

The ionizing radiation curable compounds may be used alone or in combination of two or more.
When a 1- to 3-functional meta (acrylate) monomer is used as the ionizing radiation-curable compound, in order to improve the mechanical strength of the resin layer, the ionizing radiation-curable resin composition further has a tetra- or higher-functional meta ( (Acrylate) monomers and/or oligomers are preferable, and 4- to 6-functional meta (acrylate) monomers and/or oligomers are more preferable. In this case, the content of the mono-functional meta(acrylate) monomer in the ionizing radiation-curable compound is preferably 0 to 60% by mass, more preferably 0 to 30% by mass.
The content of the ionizing radiation-curable compound in the ionizing radiation-curable resin composition constituting the binder resin is preferably 50 to 100% by mass based on the total solid content of the ionizing radiation-curable resin composition, and 75 to It is more preferably 100% by mass.

When the ionizing radiation curable compound is an ultraviolet curable compound, the ionizing radiation curable resin composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator.
Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethylketal, benzoylbenzoate, α-acyl oxime ester, thioxanthones and the like.
The photopolymerization accelerator is capable of reducing polymerization inhibition by air during curing and accelerating the curing rate, and is selected from, for example, p-dimethylaminobenzoic acid isoamyl ester and p-dimethylaminobenzoic acid ethyl ester. One or more may be mentioned.
The photopolymerization initiators and photopolymerization accelerators may be used alone or in combination of two or more.
When the ionizing radiation curable resin composition contains a photopolymerization initiator or a photopolymerization accelerator, the content thereof should be 1 to 10% by mass based on the total solid content of the ionizing radiation curable resin composition. Is preferable, and 2-8 mass% is more preferable.

(Organic particles)
The organic particles are used to form an uneven shape on the upper surface of the resin layer and impart antiglare properties. Since the organic particles have a small hardness difference from the binder resin, cracks are less likely to occur at the interface between the particles and the binder resin as compared with the inorganic particles, so that the steel wool resistance is improved. When inorganic particles are used as the particles for forming the uneven shape on the upper surface of the resin layer, even if the pencil hardness is improved, cracks easily occur at the interface due to the large hardness difference with the binder resin, and the steel wool resistance is high. descend.
When the resin layer has a configuration including an antiglare resin layer and a surface resin layer, it is preferable that the organic particles are contained only in the antiglare resin layer and not in the surface resin layer among the resin layers. Thereby, higher steel wool resistance can be imparted.
The organic particles may be those having light transmittance. The organic particles may have a spherical shape, a disc shape, a rugby ball shape, an amorphous shape, or the like, and may also include hollow particles, porous particles, solid particles, or the like having these shapes. From the viewpoint of improving the resistance to steel wool, the organic particles are preferably spherical solid particles.
As the organic particles, polymethylmethacrylate, acrylic-styrene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, silicone, fluorine-based resin, and polyester resin particles such as Can be mentioned. Among the above-mentioned organic particles, at least one selected from acrylic-styrene copolymer particles and polystyrene particles is preferable. Since the polystyrene particles have a high degree of hydrophobicity, when they are used in combination with the below-described inorganic fine particles, they are uniformly dispersed in the resin layer without being densely packed with silica fine particles, which is a typical example of the inorganic fine particles. Therefore, it is considered that the unevenness formed on the upper surface of the resin layer has less variation. Further, the acrylic-styrene copolymer particles are good in that the control of the refractive index and the degree of hydrophilicity/hydrophobicity is easy, and thus the control of internal haze and aggregation/dispersion is easy.
The organic particles may be used alone or in combination of two or more.

When two or more kinds of organic particles having different refractive indexes are used, the refractive index of the organic particles can be regarded as an average value according to the refractive index and the usage ratio of each organic particle. Therefore, it is preferable from the viewpoint that a fine refractive index can be set by adjusting the mixing ratio of the organic particles.
Therefore, in the present invention, two or more kinds of particles having different refractive indexes may be used as the organic particles. In this case, the difference in refractive index between the first organic particles and the second organic particles is preferably 0.03 or more and 0.10 or less. If the difference in the refractive index is 0.03 or more, the degree of freedom in controlling the refractive index becomes large when the both are mixed, and if the difference in the refractive index is 0.10 or less, the difference in the refractive index with the binder resin is Light diffusion is less likely to occur due to large organic particles. The difference in refractive index is more preferably 0.04 or more and 0.09 or less, and further preferably 0.04 or more and 0.07 or less.

The organic particles used in the present invention preferably have an average particle size of 7 μm or more from the viewpoint of forming a concavo-convex shape on the upper surface of the resin layer and imparting high antiglare properties. When the average particle diameter of the organic particles is 7 μm or more, high antiglare properties can be imparted even when the organic particles are not exposed on the upper surface of the resin layer and are coated with the binder resin. Both scratch resistance can be achieved. From the above viewpoint, the average particle diameter of the organic particles is more preferably 8 μm or more, and further preferably 9 μm or more. From the viewpoint of antiglare property, the average particle size of the organic particles is preferably 15 μm or less, more preferably 13 μm or less, and further preferably 11 μm or less.
Further, in the present invention, it is preferable that the organic particles have a uniform particle size. This is because if the particle diameters of the organic particles are uniform, the heights of the irregular shapes formed following the shape of the organic particles are uniform, so that higher steel wool resistance can be imparted. From this viewpoint, it is preferable that 80% or more, and more preferably 90% or more of the total organic particles have a particle diameter within the range of average particle diameter ±300 nm.

In the present invention, the average particle size of the organic particles can be calculated by the following operations (1) to (3).
(1) A transmission observation image of the optical laminate of the present invention is taken with an optical microscope. The magnification is preferably 500 to 2000 times.
(2) Arbitrary 10 particles are extracted from the observed image, the major axis and the minor axis of each particle are measured, and the particle diameter of each particle is calculated from the average of the major axis and the minor axis. The major axis is the longest diameter on the screen of each particle. In addition, the minor axis refers to a distance between two points where a line segment orthogonal to the midpoint of the line segment forming the major axis is drawn and the orthogonal line segment intersects with particles.
(3) The same operation is performed 5 times on the observation image of another screen of the same sample, and the value obtained from the number average of the particle diameters of 50 particles in total is taken as the average particle diameter of the particles.
Further, the average particle diameter of the inorganic fine particles described below is obtained by first imaging the cross section of the optical layered body of the present invention with TEM or STEM, and then performing the same method as in (2) and (3) above after imaging. The average particle size of the inorganic fine particles can be calculated. The TEM or STEM acceleration voltage is preferably 10 kV to 30 kV and the magnification is preferably 50,000 to 300,000 times.

The content of the organic particles in the resin layer is 0.1 mm×0.1 mm when the resin layer is observed from the upper surface, from the viewpoint of forming unevenness on the upper surface of the resin layer and imparting high antiglare property. The number of organic particles included in the range may be 20 or more, preferably 25 or more, and more preferably 30 or more. From the viewpoint of obtaining high scratch resistance, the number is preferably 100 or less, more preferably 70 or less, still more preferably 50 or less, still more preferably 45 or less.
In order to make the number of the organic particles contained in the range of 0.1 mm×0.1 mm when observing the resin layer from the top is 20 or more, the content of the organic particles in the resin layer is usually the resin layer. It is more than 1.0% by mass, preferably 5.0 to 30% by mass, and more preferably 10 to 20% by mass.

It is more preferable that the resin layer in the present invention further contains inorganic fine particles, if necessary. When the resin layer contains the organic particles and the inorganic fine particles, the aggregation of the organic particles can be suppressed, so that the organic particles are uniformly dispersed in the resin layer, and the unevenness of the uneven shape formed on the upper surface of the resin layer is reduced. The average particle diameter of the inorganic fine particles is preferably on the order of nanometers, but a part of the inorganic fine particles may be aggregated to be contained in the state of particles having a particle diameter of about several μm.
When the resin layer has a structure having an antiglare resin layer and a surface resin layer, the inorganic fine particles are preferably contained only in the antiglare resin layer and not in the surface resin layer. Since the antiglare resin layer contains the organic particles, the effect that the uneven shape formed on the upper surface of the resin layer can be reduced by further containing the inorganic particles in the layer. On the other hand, the surface resin layer can achieve higher steel wool resistance when it does not contain inorganic fine particles. In addition, since the fine uneven shape derived from the inorganic fine particles is not formed, the influence of the diffusion by the inorganic fine particles is reduced, and the image definition at the clear viewing distance is also improved.

From the viewpoint of obtaining the above effects, the inorganic fine particles preferably have an average particle diameter of 1 nm to 3 μm, more preferably 3 nm to 2 μm, and further preferably 5 nm to 2 μm. The average particle size of the inorganic fine particles is determined by the method described above.

Silica, alumina, zirconia, titania and the like are suitable as the inorganic substance constituting the inorganic fine particles. Among these, silica is preferable from the viewpoint of transparency and the viewpoint of reducing unevenness in unevenness. Examples of the method for producing the silica fine particles include a dry method and a wet method, but the wet method is preferable in order to form an aggregate capable of imparting high antiglare property. The wet method can be divided into a precipitation method and a gel method, but any method may be used in the present invention. When using wet process silica fine particles as the inorganic fine particles, it is preferable to use silica fine particles having an irregular shape in order to suppress excessive aggregation.
The silica fine particles obtained by the dry method are known as fumed silica (average particle diameter 5 nm to 40 nm), and are used to adjust the viscosity of the composition for forming an antiglare resin layer or to form irregularities on the upper surface of the resin layer to be formed. It can be preferably used when controlling the shape. It suffices to impart a slight degree of antiglare property that blurs the outline of an object, and when importance is attached to image sharpness and color clearness, the dry method silica fine particles are used to form the uneven shape of the resin layer upper surface. It can be made smooth and the antiglare property can be adjusted.

The inorganic fine particles may have a surface subjected to a hydrophobic treatment. Examples of the hydrophobic treatment include a chemical treatment method in which a hydrophobic compound is chemically bonded to the surface of the inorganic fine particles, and a physical treatment method in which the hydrophobic compound is allowed to penetrate into the void without chemical bonding. Generally, a chemical treatment method in which a hydrophobic compound is chemically bonded using an active group such as a hydroxyl group or a silanol group on the surface of inorganic fine particles such as silica fine particles is preferably used from the viewpoint of treatment efficiency.
As the hydrophobic compound used for the hydrophobizing treatment, a silane-based material, a siloxane-based material, a silazane-based material or the like having a hydrophobic group and a functional group having high reactivity with the active group is used. Examples of silane-based materials include chlorosilanes having one linear or branched alkyl group such as methyltrichlorosilane, ethyltrichlorosilane, and n-butyltrichlorosilane; diethyldichlorosilane, di-n-butyldichlorosilane, and ethyldimethyl. Examples thereof include chlorosilanes having two or more linear alkyl groups or branched alkyl groups such as chlorosilanes. Examples of the siloxane-based material and the silazane-based material include siloxane compounds and silazane compounds having at least one linear alkyl group or branched alkyl group.

Further, as the inorganic fine particles, reactive inorganic fine particles having a reactive group introduced by surface treatment can also be used. By introducing the reactive group, the hardness of the resin layer can be improved. A polymerizable functional group is preferably used as the reactive group, and an ionizing radiation-curable functional group is preferable. Specific examples thereof include ethylenically unsaturated bond groups such as (meth)acryloyl group, (meth)acryloyloxy group, vinyl group and allyl group.
Examples of the reactive inorganic fine particles include inorganic fine particles surface-treated with the above-mentioned silane coupling agent having a reactive group. To treat the surface of the inorganic fine particles with the silane coupling agent, a dry method of spraying the silane coupling agent on the inorganic fine particles, a wet method of dispersing the inorganic fine particles in a solvent and then adding the silane coupling agent to react Is mentioned.

The content of the inorganic fine particles in the resin layer is preferably 0.1 to 10.0% by mass in the resin layer, more preferably 0.2 to 5.0% by mass, and 0.5 to It is more preferably 2.5% by mass. By setting it in this range, it becomes easier to form the uneven shape with less variation. When the resin layer has a structure having an antiglare resin layer and a surface resin layer, the content of the inorganic fine particles in the antiglare resin layer is preferably 0.2 to 15.0% by mass, more preferably 0.4. ˜10.0% by mass.
Further, the ratio of the content of the inorganic fine particles and the organic particles in the resin layer (content of the inorganic fine particles/content of the organic particles) is 0.001 to 1.0 in terms of mass ratio from the viewpoint of obtaining high antiglare property. Is more preferable, 0.01 to 0.8 is more preferable, and 0.04 to 0.5 is further preferable.

The resin layer preferably further contains a fluorine-containing compound. In the optical layered body of the present invention, the fluorine-containing compound is preferably contained on the side close to the upper surface of the resin layer, and when the resin layer has a structure having an antiglare resin layer and a surface resin layer, the surface resin layer Preferably contains a fluorine-containing compound. This improves the scratch resistance (particularly steel wool resistance) of the upper surface of the resin layer. Further, when the optical layered body of the present invention is used on the outermost surface of a display device equipped with a touch panel, antifouling property can be imparted.
It is generally known that it is preferable to improve surface slipperiness in order to improve steel wool resistance. As the additive for improving the slipperiness of the surface, usually, a fluorine-free silicone compound is preferably used, but in the optical layered body of the present invention, a fluorine-containing silicone compound is more preferable than a fluorine-free silicone compound. The present inventors have found that the use of the compound improves the resistance to steel wool. Although the reason why such an effect is obtained is not clear, when lipids or the like are attached to the surface of the resin layer, the frictional force when rubbing with steel wool is changed or becomes non-uniform and the steel wool resistance is reduced, It is considered that this phenomenon can be avoided because the compound has a high antifouling property.
As the fluorine-containing compound, a compound known as a fluorine-based leveling agent is suitable. Since the binder resin contains the fluorine-based leveling agent, it is possible to improve the steel wool resistance and antifouling property on the upper surface of the resin layer, and to form an uneven shape following the shape of the organic particles on the upper surface of the resin layer. is there. Among them, the fluorosilicone leveling agent is more preferable from the viewpoint of obtaining the above effects.

Examples of the fluorosilicone-based leveling agent include compounds having a perfluoroalkyl group and a siloxane bond in the molecule. Specifically, the fluorine-silicone leveling agent has a perfluoroalkyl group and is a copolymer of siloxane and polyether. Compounds. The carbon number of the perfluoroalkyl group is preferably 4 to 10. The perfluoroalkyl group may be linear or branched. Examples of the polyether group include polyethylene oxide chains, polypropylene oxide chains, and copolymers thereof.
Specific examples of such a fluorosilicone leveling agent include compounds represented by the following general formula (1).

In the above general formula (1), R is a perfluoroalkyl group having 4 to 10 carbon atoms, and Q is one or more polyether chains selected from the group consisting of polyethylene oxide chains and polypropylene oxide chains. k and m are each independently 0 or 1, and n is an integer of 1 to 3.

The fluorosilicone leveling agent may have a reactive group. A polymerizable functional group is preferably used as the reactive group, and an ionizing radiation-curable functional group is preferable. Specific examples thereof include ethylenically unsaturated bond groups such as (meth)acryloyl group, (meth)acryloyloxy group, vinyl group and allyl group.
Specific examples of the fluorosilicone-based leveling agent include X-70-090, X-70-091, X-70-092, X-70-093 manufactured by Shin-Etsu Chemical Co., Ltd., and Megafac R manufactured by DIC. -08, XRB-4, etc. can be mentioned.

The content of the fluorine-containing compound in the resin layer is preferably 0.01 to 1.5% by mass, more preferably 0.05 to 1.0% by mass. When the resin layer has a structure having an antiglare resin layer and a surface resin layer, the content of the fluorine-containing compound in the surface resin layer is preferably within the above range.

From the viewpoint of antiglare property, the resin layer preferably has a thickness portion that exceeds the average particle diameter of the organic particles and a thickness portion that is less than the average particle diameter of the organic particles. The thickness of the thickest part of the resin layer (the convex-concave portion having an uneven shape) is preferably 105 to 150% of the average particle diameter of the organic particles, and more preferably 110 to 140%. When the thickness of the thickest part of the resin layer is within the above range, high antiglare properties can be achieved while imparting steel wool resistance. Further, the thickness of the thickest part of the resin layer is preferably 5 to 15 μm, and more preferably 7 to 13 μm from the viewpoint of the balance between curl suppression, mechanical strength, hardness and toughness.
The thickness of the resin layer can be calculated, for example, by measuring the thickness at 20 locations from an image of a cross section taken using a scanning transmission electron microscope (STEM) and averaging the values at 20 locations. The accelerating voltage of STEM is preferably 10 kV to 30 kV and the magnification is preferably 1000 to 7000 times.
Further, in the present invention, the thickness of the binder resin present on the upper surface side of the organic particles in the resin layer is 0.5 μm or more. When the thickness is less than 0.5 μm, the steel wool resistance of the resin layer decreases. The thickness is more preferably 1.0 μm or more, still more preferably 1.5 μm or more. Further, from the viewpoint of imparting high antiglare properties, the thickness is preferably 3.5 μm or less, more preferably 3.0 μm or less, and further preferably 2.5 μm or less.
The thickness of the binder resin existing on the upper surface side of the organic particles in the resin layer can be calculated by the same method as the thickness of the resin layer described above.

The optical layered body of the present invention has an antireflection layer, an antifouling layer, an antistatic layer on a surface of a transparent substrate on which a resin layer is not laminated, an upper surface of the resin layer, or between the transparent substrate and the resin layer. It may have a functional layer such as.

<Properties of optical laminate>
The optical layered body of the present invention has a transmitted image sharpness of 20.0 to 55.0% when the optical comb width is 2.0 mm, measured according to JIS K7374:2007. When the image clarity is within this range, while achieving high antiglare property, the image clarity when the display screen is viewed from near the clear viewing distance is also good. The image clarity is preferably 20.0 to 50.0%, more preferably 25.0 to 40.0%, and further preferably 30.0 to 40.0%.
Further, in the optical layered body of the present invention, the transmitted image sharpness when the width of the optical comb is 2.0 mm is important, but the transmitted image sharpness when the width of the optical comb is other than 2.0 mm is, for example, the optical comb. The width of 1.0 mm for the transmitted image may be about 1.0 to 20.0%.

The resin layer of the optical layered body of the present invention is preferably not damaged by the following steel wool resistance test.
Steel wool resistance test: Steel wool #0000 is used and reciprocated 1500 times at a load of 250 g/cm ² , a moving speed of 100 mm/sec, and a reciprocating moving distance of 100 mm.
As the steel wool #0000, “Bonster B-204” manufactured by Nippon Steel Wool Co., Ltd. can be used.
Since the optical layered body of the present invention has high resistance to steel wool, it has scratch resistance that can be sufficiently practically used even when used on the outermost surface of a touch panel display device. In the steel wool resistance test, it is more preferable that the steel wool is not scratched even when it is reciprocated 3000 times.

Further, in the optical layered body of the present invention, it is preferable that the resin layer has a pencil hardness of 3H or more measured at a load of 500 g and a speed of 1.4 mm/sec based on JIS K5600-5-4:1999. When both the steel wool resistance and the pencil hardness are high, the optical layered body of the present invention has more excellent scratch resistance. The pencil hardness is more preferably 4H or more, further preferably 5H or more.

Further, the optical layered body of the present invention preferably has a total light transmittance (JIS K7361-1:1997) and a haze (JIS K7136:2000) in the following ranges.
The total light transmittance is preferably 90.5% or more, more preferably 90.7% or more, and further preferably 91.0% or more.
The haze is preferably from 15 to 50%, more preferably from 20 to 40%, even more preferably from 20 to 30%.

When the optical laminate has one or two or more of the functional layers, or via an adhesive layer or the like, a cover glass, a film, or other members such as a polarizing element and a display element described later are further provided. When laminated, optical characteristics such as transmission image clarity, total light transmittance, and haze of the optical layered product are removed by peeling and removing the functional layer, the pressure-sensitive adhesive layer and the member. The measurement may be performed after pretreatment for reducing the film thickness of the agent layer as much as possible.
On the other hand, regarding the mechanical properties such as steel wool resistance and pencil hardness of the resin layer in the optical layered body, and the number of organic particles in the resin layer, if the resin layer is laminated on the outermost surface, the above pretreatment is performed. It can be measured directly without. The resin layer preferably has the above-mentioned steel wool resistance and pencil hardness and high mechanical strength. Therefore, even if another member is further laminated on the upper surface side of the resin layer, the mechanical properties of the resin layer and the number of organic particles in the resin layer are usually maintained in the state before laminating the other member. ..

<Size, shape, etc.>
The optical layered body of the present invention may be in the form of a sheet cut into a predetermined size, or in the form of a roll obtained by winding a long sheet into a roll. Although the size of the sheet is not particularly limited, the maximum diameter is about 2 to 500 inches. The “maximum diameter” means the maximum length when two arbitrary points of the optical laminated body are connected. For example, when the optical laminate has a rectangular shape, the diagonal line of the area has the maximum diameter. When the optical laminate has a circular shape, the diameter is the maximum.
When the optical layered body is in the form of a roll, the width and the length of the long sheet wound in a roll are not particularly limited, but generally, the width is 300 to 3000 mm and the length is about 50 to 5000 m. Is. The optical laminate in the form of a roll can be cut into individual sheets for use according to the size of a display device or the like. At the time of cutting, it is preferable to exclude a roll end portion or the like whose physical properties are not stable.
Further, the shape of the sheet is not particularly limited, and may be, for example, a polygon (triangle, quadrangle, pentagon, etc.), a circle, or a random irregular shape. More specifically, when the optical laminate has a quadrangular shape, the aspect ratio is not particularly limited as long as there is no problem as a display screen. For example, height:width=1:1, 3:4, 10:16, 9:16, 1:2, etc., but in in-vehicle applications and digital signage that are rich in design, they are limited to such aspect ratios. Not done.

[Method for producing optical laminate]
The method for producing the optical layered body of the present invention is not particularly limited, but as described above, on the transparent substrate, a coating solution containing a binder resin or its precursor and organic particles is applied, and dried if necessary, A method of forming a resin layer having an uneven shape on the upper surface by curing is mentioned.
The method for producing an optical layered body of the present invention, an antiglare resin layer is formed on a transparent substrate using a coating solution containing a binder resin or its precursor and organic particles, and then on the antiglare resin layer. It is preferable to have a step of forming a surface resin layer using a coating liquid containing a binder resin or a precursor thereof and containing no organic particles, and forming the resin layer on the transparent substrate. By this method, a resin layer having the above-mentioned antiglare resin layer and surface resin layer can be formed on the transparent substrate in order from the transparent substrate side. Since the resin layer has an uneven shape on the upper surface and the upper surface of the resin layer is constituted by a surface protective layer, organic particles are not exposed on the upper surface of the resin layer.

As the coating liquid for forming the antiglare resin layer, it is preferable to use a coating liquid containing a binder resin or its precursor and organic particles. As the "binder resin precursor", the above-mentioned curable resin composition is preferable, and an ionizing radiation-curable resin composition is more preferable. The coating liquid for forming the antiglare resin layer preferably further contains the above-mentioned inorganic fine particles.
The curable resin composition, the inorganic fine particles, and their preferable embodiments are as described above.

The coating liquid for forming the antiglare resin layer may further contain a leveling agent other than the fluorine-containing compound from the viewpoint of forming an uneven shape having a shape following the organic particles. Examples of the leveling agent include silicone-based ones. The content of the leveling agent other than the fluorine-containing compound is preferably 0.01 to 1.5 mass% and more preferably 0.05 to 1.0 mass% in the total solid content of the coating liquid for forming an antiglare resin layer. ..

In addition, a solvent is usually used in the coating solution for forming the antiglare resin layer in order to adjust the viscosity and make each component soluble or dispersible. Since the uneven shape after coating and drying may differ depending on the type of solvent, it is preferable to select the solvent in consideration of the saturated vapor pressure of the solvent, the permeability of the solvent into the transparent substrate, and the like.
Specifically, the solvent includes, for example, ketones (acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), cyclohexanone, etc.), ethers (dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (hexane, etc.), Alicyclic hydrocarbons (cyclohexane etc.), aromatic hydrocarbons (toluene, xylene etc.), halogenated carbons (dichloromethane, dichloroethane etc.), esters (methyl acetate, ethyl acetate, butyl acetate etc.), alcohols (Butanol, cyclohexanol, etc.), cellosolves (methyl cellosolve, ethyl cellosolve, etc.), cellosolve acetates, sulfoxides (dimethyl sulfoxide, etc.), amides (dimethylformamide, dimethylacetamide, etc.), etc. It may be.

When the transparent base material is an acrylic base material, the acrylic base material tends to swell or be dissolved easily by the solvent. Therefore, it is preferable to select a solvent that appropriately swells or dissolves the acrylic base material.
As such a solvent, alcohols (methanol, ethanol, isopropanol, 1-butanol) are preferable, and among the other solvent types, those having a larger number of carbon atoms tend to be good, and among them, those having a high evaporation rate Tend to be good. For example, in the case of ketones, methyl isobutyl ketone, in the case of aromatic hydrocarbons, toluene, in the case of glycols, propylene glycol monomethyl ether, and the like, and a mixed solvent thereof may be used.
Among the above solvents, those containing at least one selected from methyl isobutyl ketone, isopropanol and 1-butanol, and propylene glycol monomethyl ether are particularly preferable.
Examples of the solvent that swells or dissolves the TAC substrate include MEK, cyclohexanone, MIBK and the like.

The content of the solvent in the coating liquid for forming the antiglare resin layer is not particularly limited, but is preferably 50 to 250 parts by mass, and 60 to 250 parts by mass based on 100 parts by mass of the solid content in the coating liquid for forming the antiglare resin layer. It is more preferably 220 parts by mass.

As the coating liquid for forming the surface resin layer, it is preferable to use a coating liquid containing a binder resin or a precursor thereof and containing no organic particles, containing an ionizing radiation curable resin composition, and containing any particles. It is more preferable to use no coating liquid.
From the viewpoint of improving scratch resistance, the ionizing radiation-curable resin composition contained in the coating liquid for forming the surface resin layer contains a tetra- or higher functional meta(acrylate) monomer and/or oligomer as an ionizing radiation-curable compound. It is preferable that it contains a 4- to 6-functional meta (acrylate) monomer and/or oligomer. The content of the tetra- or higher functional meta (acrylate) monomer and/or oligomer in the ionizing radiation-curable compound is preferably 40 to 100% by mass, more preferably 60 to 100% by mass, and further preferably 90 to 100% by mass. Is. A 1-3 functional meta(acrylate) monomer may be used as the ionizing radiation curable compound, but the content of the 1-3 functional meta(acrylate) monomer in the ionizing radiation curable compound in that case is preferably The amount is 0 to 60% by mass, more preferably 0 to 30% by mass, and further preferably 0 to 10% by mass.
Further, the coating liquid for forming the surface resin layer preferably further contains a fluorine-containing compound.
Other than the above, the curable resin composition, the organic particles, the fluorine-containing compound, and preferred embodiments thereof are as described above.
Further, the coating liquid for forming the surface resin layer preferably contains a solvent in order to adjust the viscosity and dissolve or disperse each of the above components. Examples of the solvent include the same solvents as those exemplified in the coating liquid for forming the antiglare resin layer. The content of the solvent in the coating solution for forming the surface resin layer is not particularly limited, but is preferably 50 to 250 parts by mass, and 100 to 200 parts by mass with respect to 100 parts by mass of the solid content in the coating solution for forming the surface resin layer. More preferably, it is a part.

As a method for producing an optical laminate of the present invention, a coating solution for forming an antiglare resin layer containing an ionizing radiation curable resin composition, and a coating solution for forming a surface resin layer containing an ionizing radiation curable resin composition are used. The case will be described as an example.
First, the coating liquid for forming the antiglare resin layer described above is applied onto the transparent substrate. The coating solution for forming the antiglare resin layer is, for example, a resin composition containing the above-mentioned ionizing radiation-curable compound, organic particles, and optionally inorganic fine particles, a solvent, etc., which are uniformly mixed at a predetermined ratio. Can be prepared.
As a coating method of the coating liquid for forming the antiglare resin layer, known coating methods such as gravure coating and bar coating can be used. Further, if necessary, it is dried to form an uncured resin layer on the transparent substrate.
From the viewpoint of forming an uneven shape with less variation, it is preferable to control the drying conditions when forming the antiglare resin layer. The drying conditions can be controlled by the drying temperature and the wind speed in the dryer. A specific drying temperature is preferably 30 to 120° C., and a drying wind speed is preferably 0.2 to 50 m/s. Further, in order to control the leveling of the antiglare resin layer depending on the drying condition, it is preferable that the irradiation of the ionizing radiation is performed after the drying.

Next, the uncured resin layer is irradiated with ionizing radiation such as an electron beam or an ultraviolet ray to cure the uncured resin layer to form an antiglare resin layer. Here, when an electron beam is used as the ionizing radiation, the accelerating voltage thereof can be appropriately selected according to the resin used and the thickness of the layer, but usually the uncured resin layer is cured at an accelerating voltage of about 70 to 300 kV. preferable.
When ultraviolet rays are used as the ionizing radiation, those containing ultraviolet rays having a wavelength of 190 to 380 nm are usually emitted. The ultraviolet source is not particularly limited, and for example, a high pressure mercury lamp, a low pressure mercury lamp, a metal halide lamp, a carbon arc lamp, etc. can be used.

A surface resin layer is formed on the antiglare resin layer formed as described above using the coating solution for forming the surface resin layer. For example, a resin composition containing the above-mentioned ionizing radiation-curable compound, and a fluorine-containing compound, a solvent, and the like, which are optionally used, are uniformly mixed at a predetermined ratio to prepare a coating solution for forming a surface resin layer. A surface resin layer made of a cured product of an ionizing radiation curable resin composition, which is obtained by applying the coating solution on the antiglare resin layer so as to have a desired thickness after curing, drying it if necessary, and then curing it. Can be formed. The method of applying the coating solution and the method of curing the same are the same as the method of forming the antiglare resin layer described above.

[Laminated material]
The laminated member of the present invention has the above-mentioned optical laminated body of the present invention and a polarizing element.
The layered structure of the laminated member may be a structure in which the optical laminated body is laminated on at least one surface of the polarizing element. Specifically, a structure in which the optical laminate of the present invention is laminated on one surface of the polarizing element and the polarizing element protective film is laminated on the other surface, or the polarizing element protective film is laminated on both surfaces of the polarizing element. A configuration in which the optical layered body of the present invention is further laminated on one polarizing element protective film may be mentioned. The optical layered body is usually layered so that the transparent substrate side faces the polarizing element side surface.
The laminated member of the present invention can also be used as a polarizing plate. In addition to the polarizing element, the laminated member may further include another optical member such as a retardation film.

The laminated member of the present invention may be formed, for example, by cutting the optical laminated body of the present invention and a polarizing element into sheets each of which is cut in accordance with the size of a display device, and then pasted together, or rolled members are pasted together. May be combined. When the roll-shaped members are attached to each other, they may be cut thereafter according to the size of the display device.
When the laminated member of the present invention is applied to a display device such as a liquid crystal display device, after laminating the laminated member in the form of a sheet or a roll with a display element or the like described later, the size of the display device is adjusted. You may cut it. At the time of cutting, it is preferable to exclude a roll end portion or the like whose physical properties are not stable.

The optical layered body and the layered member of the present invention are used as a constituent member of a display device such as a liquid crystal display device, and arranged so that the upper surface of the resin layer in the optical layered body faces the viewer side (light emitting surface side of the display device). It is preferable to use. Furthermore, the optical laminated body or the laminated member of the present invention is installed on the outermost surface of the display device, and the resin layer upper surface of the optical laminated body is arranged so as to face the observer side (light emitting surface side of the display device). It is preferable to use.

[Display device]
The display device of the present invention is characterized by comprising the above-mentioned optical laminated body or laminated member. From the viewpoint of more effectively obtaining the effects of the present invention, it is preferable that the display device includes the above-mentioned optical laminate or laminate member on the viewer side of the display element (light emitting surface side of the display device). More specifically, the above-mentioned optical laminated body or laminated member is provided on the outermost surface of the display element on the observer side, and the upper surface (the surface having the uneven shape) of the resin layer in the optical laminated body is the observer side. It is preferable that the display device is arranged as described above.
The size of the display device is not particularly limited, but the maximum diameter is about 2 to 500 inches. The "maximum diameter" means the maximum length when two arbitrary points of the display device are connected. For example, when the display device has a rectangular shape, the diagonal line of the region has the maximum diameter, and when the display device has a circular shape, the diameter has the maximum diameter.

A liquid crystal display element, a plasma display element, an organic EL display element, etc. are mentioned as a display element which comprises a display apparatus.
The specific configuration of the display element is not particularly limited. For example, in the case of a liquid crystal display device, it has a basic structure having a lower glass substrate, a lower transparent electrode, a liquid crystal layer, an upper transparent electrode, a color filter and an upper glass substrate in that order. The upper transparent electrode is densely patterned.

The display device of the present invention is preferably a display device equipped with a touch panel. A display device equipped with a touch panel has a touch panel on a display element, and a display device including the optical laminate or the laminate member of the present invention as a constituent member of the touch panel, preferably a member forming the outermost surface of the touch panel. Can be mentioned. Also in this embodiment, it is preferable to dispose the resin layer in the optical laminate so that the upper surface (the surface having the uneven shape) is on the observer side.

Examples of the touch panel include a capacitive touch panel, a resistive film touch panel, an optical touch panel, an ultrasonic touch panel, an electromagnetic induction touch panel, and the like.
The resistive film type touch panel has a basic structure in which conductive films of a pair of upper and lower transparent substrates having conductive films are arranged so as to face each other, and a circuit is connected to the basic structure. is there.
The capacitive touch panel includes a surface type and a projection type, and the projection type is often used. The projected capacitive touch panel has a circuit connected to a basic configuration in which an X-axis electrode and a Y-axis electrode orthogonal to the X-axis electrode are arranged via an insulator. The basic configuration will be described in more detail. (1) A mode in which an X-axis electrode and a Y-axis electrode are formed on different surfaces of one transparent substrate, and (2) an X-axis electrode and an insulator on the transparent substrate. Layer, Y-axis electrode is formed in this order, (3) X-axis electrode is formed on a transparent substrate, Y-axis electrode is formed on another transparent substrate, and laminated via an adhesive layer or the like Etc. In addition to these basic aspects, there is an aspect in which another transparent substrate is laminated.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The "parts" are based on mass unless otherwise specified.
The atmosphere at the time of each measurement and evaluation in the examples was set to a temperature of 23° C.±5° C. and a humidity of 40 to 65%. In addition, before the start of each measurement and evaluation, the target sample was exposed to the atmosphere for 30 minutes or more and then measured and evaluated.

1. Measurement and Evaluation of Physical Properties of Optical Laminates Physical properties of optical laminates of Examples and Comparative Examples were measured and evaluated as follows. The results are shown in Table 1. In all measurements and evaluations, a portion of the sample free from wrinkles and stains was used, and the measurement sample was taken from the central portion, which is considered to be a relatively stable coating film, rather than the end portion of the manufactured sample.

1-1. Number of organic particles in resin layer 100 mm×100 mm cut on four sides of an optical laminate with a mending tape (3M, product name “810-3-18”) optical microscope (manufactured by KEYENCE CORPORATION, product name) "Digital microscope VHX-5000") was attached to the stage. From the upper surface side of the resin layer, observe with an optical microscope at a magnification of 1000 times by a transmission method, measure the number of particles in a 0.1 mm square area at 16 points, and exclude the minimum and maximum measured values at 14 points. The average value of the measured values was used as the number of organic particles.

1-2. Transmission image sharpness The optical laminate cut into 100 mm×100 mm was used for image clarity measurement according to JIS K7374:2007 by using an image clarity measuring device (trade name: ICM-1T) manufactured by Suga Test Instruments Co., Ltd. The transmitted image sharpness of 0.0 mm was measured. The light incident surface was on the transparent substrate side.

1-3. Antiglare property A black acrylic plate (manufactured by Kuraray Co., Ltd.) via a transparent adhesive (manufactured by Hitachi Chemical Co., Ltd., product name “DA-1000”) on the transparent substrate side of the optical laminate cut into 100 mm×100 mm. , A product name "COMOGLASS 502K") was attached to the evaluation sample, and the fluorescent lamp was placed 2 m above the evaluation sample. A fluorescent lamp was transferred onto the evaluation sample, and the illuminance on the evaluation sample was visually observed from various angles under the environment of 800 to 1200 Lx, and evaluated according to the following criteria.
AA: White reflection was observed on the entire surface of the sample, and clear light and darkness could not be recognized.
A: The reflection area of the fluorescent lamp can be recognized as the bright portion, but the shape cannot be recognized as the fluorescent lamp.
B: The boundary between the center of the reflection area of the fluorescent lamp (the portion corresponding to the core of the fluorescent lamp) and its periphery is blurred, and the boundary cannot be recognized. Furthermore, the boundary between the reflective area and the non-reflective area of the fluorescent lamp is blurred and the boundary cannot be recognized.
C: The boundary between the center of the reflection area of the fluorescent lamp (the portion corresponding to the core of the fluorescent lamp) and its periphery can be clearly recognized. Alternatively, the boundary between the reflective area and the non-reflective area of the fluorescent lamp can be clearly recognized.

1-4. Steel wool resistance A black tape (manufactured by Yamato, trade name "Yamato vinyl tape No. 200") was attached to the back surface of the optical laminate cut into 50 mm x 150 mm. The resin layer of the optical layered body is placed on the upper surface, and a mending tape (manufactured by 3M, product name "810-3-18") is attached to the short side of the back surface of the optical layered body, and a Gakushin abrasion tester (Tester Sangyo Co., Ltd.) Manufactured, product name “AB-301”) and attached to a base. Steel wool #0000 (manufactured by Nippon Steel Wool Co., Ltd., trade name "Bonster B-204") is set and brought into contact with the upper surface of the resin layer, with a load of 250 g/cm ² , a moving speed of 100 mm/sec, and a reciprocating moving distance of 100 mm. It was reciprocated 1500 times and 3000 times. The degree of scratches on the upper surface of the resin layer was visually observed by reflection with a fluorescent lamp, and the steel wool resistance was evaluated according to the following criteria.
A: No scratches were confirmed even after 3000 round trips.
B: No scratches were found after 1500 round trips, but scratches were found after 3000 round trips. C: A scratch was confirmed after reciprocating 1500 times.

1-5. The pencil hardness of the optical layer cut on the pencil hardness of 50 mm×100 mm was measured according to JIS K5600-5-4:1999 at a load of 500 g and a speed of 1.4 mm/sec to measure the pencil hardness of the resin layer upper surface of the optical layer. The hard coat properties of the obtained optical laminate were evaluated.
A pencil hardness tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.) was used for the measurement. Mending tape (manufactured by 3M, product name “810-3-18”) was attached to both ends of the cut sample, and attached to the base of a pencil hardness tester. The pencil hardness was defined as the hardness of the pencil used when the pencil hardness test was conducted 5 times and no abnormal appearance such as scratches was observed 3 times or more. Regarding the abnormal appearance, discoloration was not included, and scratches and dents were checked. For example, the pencil hardness of the optical layered body is 2H when the test is performed 5 times using a pencil of 2H and the appearance abnormality does not occur 3 times.

1-6. Haze The optical layered body cut into 50 mm x 100 mm was measured for haze using a haze meter (HM-150, manufactured by Murakami Color Research Laboratory Co., Ltd.) according to JIS K-7136:2000. The resin layer surface side was used as the light incident surface.

1-7. Image clarity from clear viewing distance A commercially available tablet (7 to 13 inches) with an optical layered body cut into a size of 50 mm×100 mm on the surface of the resin layer is used as a mending tape (manufactured by 3M, trade name “810-3”). -18"), the characters of newspaper articles were displayed on the tablet in the size of "standard", and the readability of the characters was evaluated according to the following criteria.
A: Letters look clear and sentences can be read clearly. B: Letters appear to be slightly blurred, but there is no problem in reading the sentences. C: Letters appear to be blurred and the sentences are difficult to read.

1-8. The thickness of the thickest part of the resin layer/the thickness of the binder resin existing on the organic particles The optical laminate cut into 2 mm x 5 mm is placed in a silicone-based embedding plate, and an epoxy-based resin is poured as the embedding resin for optical lamination. The whole body was embedded in resin. After allowing the embedding resin to stand at 65° C. for 12 hours or more to cure it, an ultramicrotome (manufactured by Leica Microsystems, trade name “Ultramicrotome EM UC7”) was used to set the delivery thickness to 100 nm and to obtain an ultrathin film. A section was prepared. The prepared ultrathin section was sampled with a mesh (150) with a collodion film, and used as a sample for scanning transmission electron microscope (STEM) observation. It should be noted that it is preferable to sputter Pt-Pd for about 20 seconds, because the observed image by STEM may be difficult to see if conduction is not obtained in this sample. The sputter time can be adjusted as appropriate, but care must be taken because the sputtered metal becomes a particle-like foreign particle image because it is too short at 10 seconds and too long at 100 seconds.
The thickness of the thickest part of the resin layer and the thickness of the binder resin existing on the organic particles were measured as follows. First, a scanning transmission electron microscope (STEM) (manufactured by Hitachi High-Technologies Corporation, trade name "S-4800 (TYPE2)") was used to take a cross-sectional photograph of the STEM sample. When taking this cross-sectional photograph, the focus was adjusted at 5000 times to 200,000 times for the STEM observation with the detector (selection signal) set to “TE”, the acceleration voltage set to 30 kV, and the emission set to “10 μA”. Then, the contrast and brightness were adjusted appropriately so that each layer can be distinguished. Preferred magnifications are 10,000 times to 100,000 times, more preferable magnifications are 10,000 times to 50,000 times, and most preferable magnifications are 25,000 times to 50,000 times. When taking a cross-sectional photograph, the beam monitor diaphragm 3 and the objective lens diaphragm 3 may be used as the aperture and the working distance (WD) may be 8 mm. The thickness of 20 points of the obtained cross-sectional image was measured and calculated from the average value of the values of 20 points.

2. Production Example 1 of Optical Laminate
Coating on a transparent base material (triacetyl cellulose base material (TAC), "TD80UL" manufactured by Fuji Film Co., Ltd., thickness 80 μm, 200 mm×600 mm) after drying, the coating solution A for forming an antiglare resin layer having the following formulation The amount of coating is 5 g/m ² , and the coating is dried at 70° C. for 30 seconds, and then is irradiated with ultraviolet rays in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) so that the integrated light amount becomes 70 mJ/cm ² , An antiglare resin layer was formed.
Then, a coating solution A for forming a surface resin layer having the following formulation was applied on the antiglare resin layer so that the coating amount after drying was 5 g/m ^2, and was dried at 70° C. for 30 seconds, and then ultraviolet rays were applied in a nitrogen atmosphere. Irradiation was performed under an (oxygen concentration of 200 ppm or less) so that the integrated light amount was 100 mJ/cm ² , and a surface resin layer was formed to obtain an optical laminate. The thickness of the thickest part of the entire resin layer including the antiglare resin layer and the surface resin layer was 11 μm.
The said evaluation was performed using the obtained optical laminated body. The results are shown in Table 1.

<Anti-glare resin layer forming coating liquid A>
* Trifunctional acrylate monomer (PETA) 60 parts * Hexafunctional acrylate monomer (DPHA) 40 parts * Photopolymerization initiator 3.5 parts (BASF Corporation, Irgacure 184)
-Photopolymerization initiator 0.5 part (BASF Corporation, Irgacure 907)
-Silicone-based leveling agent 0.025 parts-Organic particles A (spherical acrylic-styrene copolymer particles (monodisperse), refractive index n=1.55, average particle diameter 9 μm) 30 parts-Organic particles B (spherical acrylic- Styrene copolymer particles (monodisperse), refractive index n=1.59, average particle size 9 μm) 15 parts/inorganic fine particles 5 parts (wet method (precipitation method) silica, average particle size 1 μm)
・Solvent (toluene) 86 parts ・Solvent (cyclohexanone) 12 parts ・Solvent (MIBK) 2 parts

<Surface resin layer forming coating liquid A>
・6 functional acrylate monomer (DPHA) 100 parts ・Photopolymerization initiator 4 parts (BASF, Irgacure 184)
・Fluorosilicone leveling agent 0.2 parts ・Solvent (MIBK) 150 parts

Example 2
In the antiglare resin layer-forming coating solution A of Example 1, 20 parts of organic particles A and 10 parts of organic particles B were prepared to prepare an antiglare resin layer forming coating solution B, and except that this was used. An optical laminate was obtained in the same manner as in Example 1. The results of the above evaluations are shown in Table 1.
Example 3
An optical layered body was obtained in the same manner as in Example 1 except that the coating amount of the surface resin layer of Example 1 after drying was 4 g/m ² . The results of the above evaluations are shown in Table 1.

Comparative Example 1
In the antiglare resin layer-forming coating liquid A of Example 1, an antiglare resin layer forming coating liquid C in which the organic particles A were changed to 3 parts and the organic particles B were changed to 2 parts was prepared, and this was used. An optical laminate was obtained in the same manner as in Example 1. The results of the above evaluations are shown in Table 1.

Comparative example 2
The coating solution D for forming an antiglare resin layer having the following formulation was applied to a transparent substrate so that the coating amount after drying was 7 g/m ^2, and dried at 70° C. for 30 seconds, and then ultraviolet rays were applied in a nitrogen atmosphere (oxygen concentration). Under 200 ppm or less), irradiation was performed so that the integrated light amount was 100 mJ/cm ² , to form an antiglare resin layer, and an optical layered body was obtained.
<Coating liquid D for forming antiglare resin layer>
-Pentaerythritol triacrylate (PETA) 50 parts-Urethane acrylate 30 parts-Photopolymerization initiator 5 parts (BASF Corporation, Irgacure 184)
-Silicone-based leveling agent 0.025 parts-Organic particles C (spherical acrylic-styrene copolymer particles, refractive index n=1.55, average particle size 3.5 μm) 14 parts-Inorganic fine particles 60 parts (Nissan Chemical Industry ( Co., Ltd., silica fine particles having a reactive functional group introduced on the surface (dispersion liquid), solvent: toluene, solid content: 60 mass%, average particle diameter 5 nm)
・Solvent (toluene) 135 parts ・Solvent (cyclohexanone) 55 parts

Comparative Example 3
The coating solution A for forming an intermediate resin layer having the following formulation was applied to a transparent substrate so that the coating amount after drying was 20 g/m ² and dried at 70° C. for 30 seconds, and then ultraviolet light was applied in a nitrogen atmosphere (oxygen concentration: 200 ppm). Below), the intermediate resin layer was formed by irradiation so that the integrated light amount was 70 mJ/cm ² . Then, an antiglare resin layer was formed in the same manner as in Comparative Example 2 to obtain an optical layered body.
<Coating liquid A for forming intermediate resin layer>
* Hexafunctional acrylate monomer (DPHA) 100 parts * Inorganic fine particles 80 parts (manufactured by Nissan Chemical Industries, Ltd., silica fine particles (dispersion liquid) with reactive functional groups introduced on the surface, solvent: toluene, solid content: 60 mass %, average particle size 5 nm)
-Photopolymerization initiator 5 parts (manufactured by BASF, Irgacure 184)
・Silicone leveling agent 0.1 parts ・Solvent (toluene) 150 parts

Comparative Example 4
In the antiglare resin layer forming coating liquid A of Example 1, an antiglare resin layer forming coating liquid E was prepared by changing the organic particles A to 40 parts and the organic particles B to 20 parts, and using this, except that An optical laminate was obtained in the same manner as in Example 1. The results of the above evaluations are shown in Table 1.

As shown in the results of Table 1, the optical layered body and the display device of the present invention are excellent in antiglare property and scratch resistance, and also have an image sharpness from the vicinity of the clear viewing distance when applied to the display device. It is good.
On the other hand, in the optical layered body of Comparative Example 1, the number of organic particles contained in the range of 0.1 mm×0.1 mm was less than 20, and the transmitted image clarity was 50 when the width of the optical comb was 2.0 mm. Since it exceeds 0.0%, the antiglare property was insufficient. In the optical layered body of Comparative Example 2, since the thickness of the binder resin existing on the organic particles was small and the thickness of the entire resin layer was small, the steel wool resistance and pencil hardness were lowered. The optical layered body of Comparative Example 3 had a good pencil hardness because it had an intermediate resin layer, but the steel wool resistance decreased because the thickness of the binder resin present on the organic particles was thin. Further, in Comparative Example 4, the transmitted image clarity when the width of the optical comb was 2.0 mm was less than 20.0%, and therefore the image clarity from the clear viewing distance was insufficient.

The optical layered body of the present invention is excellent in antiglare property, scratch resistance, and, when applied to a display device, is excellent in image clarity from the vicinity of the clear viewing distance, and therefore is particularly used for the outermost surface of a touch panel display device. It is suitable as an antiglare member. In addition, it is also useful as a constituent member of a polarizing plate used for a display device or the like.

100 Optical Layered Body 1 Transparent Substrate 2 Resin Layer 2a Resin Layer Upper Surface 3 Binder Resin 4 Organic Particles

Claims (12)

An optical laminate having a resin layer containing a binder resin and organic particles on at least one surface of a transparent substrate,
The resin layer has an uneven shape on its upper surface,
The organic particles are not exposed on the upper surface of the resin layer, and the thickness of the binder resin present on the upper surface side of the organic particles in the resin layer is 0.5 μm or more. The number of the organic particles contained in the range of 0.1 mm×0.1 mm when observed from above is 20 or more,
An optical laminate having a transmitted image clarity of 20.0 to 55.0% when the width of the optical comb is 2.0 mm, which is measured according to JIS K7374:2007. The optical laminate according to claim 1, wherein the average particle diameter of the organic particles is 7 µm or more. The optical laminate according to claim 1 or 2, wherein the binder resin is a cured product of an ionizing radiation curable resin composition. The optical layered body according to any one of claims 1 to 3, wherein the resin layer is not damaged by the following steel wool resistance test.
Steel wool resistance test: Steel wool #0000 is used and reciprocated 1500 times at a load of 250 g/cm ² , a moving speed of 100 mm/sec, and a reciprocating moving distance of 100 mm. The pencil hardness of the resin layer measured at a load of 500 g and a speed of 1.4 mm/sec in accordance with JIS K5600-5-4:1999 has a pencil hardness of 4H or more, and the pencil hardness of any one of claims 1 to 4. Optical stack. The optical layered body according to any one of claims 1 to 5, wherein the resin layer contains a fluorine-containing compound. The optical layered body according to any one of claims 1 to 6, wherein the resin layer has a thickness portion that exceeds the average particle diameter of the organic particles and a thickness portion that is less than the average particle diameter of the organic particles. The resin layer is a structure having an antiglare resin layer and a surface resin layer in order from the transparent substrate side, the antiglare resin layer contains the organic particles, the surface resin layer does not contain the organic particles, The optical layered body according to any one of claims 1 to 7. A laminated member having the optical laminated body according to claim 1 and a polarizing element. An antiglare resin layer is formed on the transparent substrate by using a coating liquid containing the binder resin or its precursor and the organic particles, and then the binder resin or its precursor is formed on the antiglare resin layer. 9. The method according to claim 1, further comprising a step of forming a surface resin layer using a coating liquid containing and not containing the organic particles to form the resin layer on the transparent substrate. The method for producing an optical layered body of. A display device provided with the optical layered body according to any one of claims 1 to 8 or the layered member according to claim 9 on the viewer side of the display element. The display device according to claim 11, which is a display device equipped with a touch panel.