JP2011169987A - Antiglare film, method of manufacturing the same, ultraviolet curable resin composition, and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antiglare film that ensures superior antiglare property and antistatic property without complicating a manufacture process. <P>SOLUTION: The antiglare film 1 includes a base material 11 having an rugged surface and a hard coat layer 12 formed on the rugged surface of the base material. A rugged shape imitating the rugged surface of the base material is formed on the surface of the hard coat layer, and the hard coat layer is obtained by applying the ultraviolet curable resin composition onto the rugged surface of the base material and curing it. The ultraviolet curable resin composition contains a monomer and/or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid. The mixing amount of the ionic liquid is 10 to 25 mass% relative to the entire solid portion of the ultraviolet curable resin composition. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an antiglare film and a method for producing the same, an ultraviolet curable resin composition, and a display device. Specifically, the present invention relates to an antiglare film having an antistatic function.

  In recent years, various display devices such as a liquid crystal display (LCD) and a plasma display (PDP) have been widely used. The screens of these display devices are anti-glare film that diffuses and reflects the external light on the screen surface, as the external light such as sunlight and indoor lighting is reflected and the visibility in the bright place is significantly hindered. Is frequently used.

  Conventionally, in this anti-glare film, a method of forming a fine uneven structure on the surface is used in order to diffusely reflect external light on the screen surface. Specifically, a method of applying a diffusion layer in which transparent fine particles are dispersed in a hard coat paint in consideration of scratching properties on a transparent plastic substrate is the mainstream of current liquid crystal display devices.

  Patent Document 1 discloses a technique for obtaining a smoother surface irregularity by applying a paint containing a resin binder and a flow regulator such as organic fine particles or inorganic fine particles on an antiglare layer containing particles. Proposed.

  However, in various display devices typified by recent flat-screen televisions, improvement in image quality and high definition are rapidly progressing, and pixels are downsized. For this reason, the light transmitted through the antiglare film is distorted by refraction and diffusion due to fine particles in the antiglare layer and the surface uneven structure, and the image becomes unclear or the brightness varies, The image quality may be dark and the quality may deteriorate significantly. Therefore, it is difficult for the current antiglare film that forms the surface uneven structure using fine particles to sufficiently follow the improvement in image quality and high definition as described above.

  In view of this, the following technique for forming a surface uneven structure without using fine particles has been proposed. That is, a technique has been proposed in which a concavo-convex shape is formed on the surface of a substrate, and an ultraviolet curable resin composition is applied and cured on the concavo-convex shape to form a concavo-convex shape on the surface of the hard coat layer (for example, Patent Documents). 2). However, in this technique, since the ultraviolet curable resin composition is leveled and fills the unevenness of the substrate surface, the antiglare property is lowered.

  Then, the technique which dries and hardens | cures by making the application surface of an ultraviolet curable resin composition face down is proposed (refer patent document 2). However, in the technique described in Patent Document 2, it is necessary to dry and harden the hard coat liquid coating surface downward, which complicates the manufacturing process.

  In addition, the plastic substrate and the hard coat layer (acrylic cured film) are easily charged, and dust and dust are easily attached thereto. For this reason, in recent years, it has been strongly desired to impart an antistatic function to the antiglare film.

JP 2008-32845 A

JP 2007-233129 A

  Accordingly, an object of the present invention is to provide an antiglare film capable of obtaining excellent antiglare properties and antistatic properties without complicating the production process, a method for producing the same, an ultraviolet curable resin composition, and a display. To provide an apparatus.

In order to solve the above-mentioned problem, the first invention
A substrate having an uneven surface;
A hard coat layer formed on the uneven surface of the substrate,
On the surface of the hard coat layer, an uneven shape following the uneven surface of the substrate is formed,
The hard coat layer is obtained by applying and curing an ultraviolet curable resin composition on the uneven surface of the substrate,
The ultraviolet curable resin composition contains a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid,
It is an anti-glare film whose compounding quantity of an ionic liquid is 10 mass% or more and 25 mass% or less with respect to the total solid of an ultraviolet curable resin composition.

The second invention is
Applying an ultraviolet curable resin composition to the uneven surface of the substrate;
A step of copying the ultraviolet curable resin composition on the uneven surface of the substrate by drying the applied ultraviolet curable resin composition;
A step of curing the dried UV curable resin composition,
The ultraviolet curable resin composition contains a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid,
It is a manufacturing method of the anti-glare film whose compounding quantity of an ionic liquid is 10 to 25 mass% with respect to the total solid of an ultraviolet curable resin composition.

The third invention is
Monomers and / or oligomers having two or more (meth) acryloyl groups;
A photopolymerization initiator;
An inorganic oxide filler;
An ionic liquid and
It is an ultraviolet curable resin composition whose compounding quantity of an ionic liquid is 10 mass% or more and 25 mass% or less with respect to the total solid.

  In the present invention, the ultraviolet curable resin composition contains an inorganic oxide filler and an ionic liquid. Accordingly, in the drying process, the viscosity of the ultraviolet curable resin composition is increased by the action of the inorganic oxide filler and the ionic liquid contained in the ultraviolet curable resin composition, and the viscosity is increased. Follows the uneven surface of the substrate. Accordingly, a concavo-convex shape following the concavo-convex surface of the substrate is formed on the surface of the hard coat layer, and antiglare properties are obtained. That is, an antiglare film having excellent antiglare properties can be obtained without complicating the manufacturing process. Further, since the hard coat layer contains an ionic liquid, antistatic properties are exhibited in the hard coat layer.

  As described above, according to the present invention, excellent antiglare properties and antistatic properties can be obtained without complicating the manufacturing process.

FIG. 1 is a cross-sectional view showing a configuration example of an antiglare film according to the first embodiment of the present invention. 2A and 2B are diagrams for explaining the definition of the bottom surface of the protrusion formed on the surface of the hard coat layer. FIG. 3 is a plan view showing an example of the shape of the uneven surface of the substrate. FIG. 4 is a graph showing a preferable range of the minimum distance R _m and the maximum distance R _M of the structure. FIG. 5 is a flowchart for explaining an example of a method for producing an antiglare film according to the first embodiment of the present invention. 6A to 6C are process diagrams for explaining an example of a method for producing an antiglare film according to the first embodiment of the present invention. 7A to 7D are process diagrams for explaining an example of a method for producing an antiglare film according to the first embodiment of the present invention. 8A to 8C are process diagrams for explaining an example of a method for producing an antiglare film according to the first embodiment of the present invention. FIG. 9: is a top view which shows an example of the shape of the uneven surface of the base material with which the anti-glare film which concerns on the 2nd Embodiment of this invention is equipped. FIG. 10A is a cross-sectional view illustrating a first configuration example of a base material included in an antiglare film according to a third embodiment of the present invention. FIG. 10B is a cross-sectional view illustrating a second configuration example of the base material included in the antiglare film according to the third embodiment of the present invention. FIG. 11A is a schematic diagram illustrating a first example of the shape of a microstructure. FIG. 11B is a schematic diagram illustrating a second example of the shape of the fine structure. FIG. 11C is a schematic diagram illustrating a third example of the shape of the microstructure. FIG. 12: is sectional drawing which shows one structural example of the anti-glare film which concerns on the 4th Embodiment of this invention. FIG. 13 is a cross-sectional view showing a configuration example of a display device according to the fifth embodiment of the present invention.

Embodiments of the present invention will be described in the following order with reference to the drawings.
1. First Embodiment (An example of an antiglare film provided with a hard coat layer containing an ionic liquid: see FIG. 1)
2. Second Embodiment (An example of an antiglare film in which an uneven surface of a substrate is formed by two kinds of structures: see FIG. 9)
3. Third Embodiment (An example of an antiglare film in which a fine structure is formed on an uneven surface of a substrate: see FIG. 10)
4). Fourth Embodiment (An example of an antiglare film in which a step is formed on a side surface of a structure: see FIG. 12)
5. Fifth Embodiment (Example in which an antiglare film is applied to the surface of a display device: see FIG. 13)

<1. First Embodiment>
[1.1. Composition of antiglare film]
FIG. 1 is a cross-sectional view showing a configuration example of an antiglare film according to the first embodiment of the present invention. This anti-glare film 1 is an optical film having a concavo-convex shape on the surface and scattering reflected light by the concavo-convex shape. As shown in FIG. 1, the antiglare film 1 includes a base material 11 having an uneven surface and a hard coat layer 12 formed on the uneven surface of the base material 11. The surface of the hard coat layer 12 is formed with an uneven shape that follows the uneven surface of the substrate 11. The uneven shape on the surface of the hard coat layer 12 is preferably gentler than the uneven shape of the substrate 11.

  It is preferable that the concavo-convex surface of the hard coat layer 12 includes a plurality of protrusions 12a having side surfaces extending from the top to the bottom. By providing the plurality of protrusions 12a having such side surfaces, the uneven surface of the antiglare film 1 can be formed by gentle undulation. That is, the scattering range of external light can be narrowed without impairing the antiglare property. It is preferable that the bottom surfaces of the adjacent protrusions 12a out of the plurality of protrusions 12a are in contact with each other or substantially in contact with each other. With such a relationship, the filling rate of the protrusions 12a on the uneven surface of the antiglare film 1 can be increased, the flat portion can be reduced, and the antiglare property can be increased. Here, that the bottom surfaces of the protrusions 12a are substantially in contact means that the distance between the bottom surfaces of the protrusions 12a is adjacent to each other within a range of 0 μm to 80 μm.

2A and 2B are for explaining the definition of the bottom surface of the protrusion.
As shown in FIG. 2A, the bottom surface of the protrusion 12a is a value obtained as follows. For any given protrusion 12a, the cross-sectional shape on the plane including the z-axis is evaluated. The side surface of the protrusion 12a is lowered to the left and right, and the figure 12v formed by connecting the positions of the minimum values α that are first encountered with respect to an arbitrary cross section is projected onto the xy plane. The projected figure 12w is defined as the bottom surface of the protrusion 12a.

  Further, as shown in FIG. 2B, when there is a gap between the adjacent protrusions 12a, this gap portion is planar. In this case, the position of the minimum value α is defined as follows. That is, the side surface of the projection 12a is lowered from the apex to the left and right, and the boundary point between the side surface of the projection 12a and the planar gap is defined as the position of the minimum value α.

  The height of the concavo-convex surface (height of the protrusion 12a) is a difference in position between the apex of the protrusion 12a and the minimum value between the protrusions in the z-axis direction. However, the z-axis direction is the thickness direction of the substrate 11. The x-axis direction and the y-axis direction are directions orthogonal to each other in the plane of the antiglare film 1 and orthogonal to the z-axis.

  The maximum height (Rz) of the uneven surface of the hard coat layer 12 is 0.1 μm or more and 1 μm or less, preferably 0.25 μm or more and 0.95 μm or less. If it is less than 0.1 μm, the scattering range of external light becomes too narrow, and the antiglare property tends to be impaired. On the other hand, when the thickness exceeds 1 μm, the scattering range of the external light becomes too wide, and when the antiglare film 1 is applied to a liquid crystal display device or the like, the blackness of the display surface tends to decrease and the visibility tends to decrease. .

  The uneven surface of the hard coat layer 12 has a ratio of an inclination angle component of 2.5 ° or more and an inclination angle component of 2 ° or less of 1/1000 or less, and an inclination angle component of 0.5 ° or less is 85% of the whole. It is preferable to have an inclination angle distribution that is not more than%. When the ratio of the tilt angle component of 2.5 ° or more and the tilt angle component of 2 ° or less exceeds 1/1000, the blackness of the display surface is reduced when the antiglare film 1 is applied to a liquid crystal display device or the like. It tends to decrease and visibility decreases. When the inclination angle component of 0.5 ° or less exceeds 85% of the whole, the antiglare property tends to be lowered.

  The uneven surface of the hard coat layer 12 preferably has an inclination angle distribution in which an inclination angle component of 3 ° or more is 0.1% or less. When the tilt angle component of 3 ° or more exceeds 0.1%, when the antiglare film 1 is applied to a liquid crystal display device or the like, the blackness of the display surface tends to be lowered and the visibility tends to be lowered.

  The uneven surface of the hard coat layer 12 preferably has an inclination angle distribution in which an inclination angle component of 2 ° or less is 90% or more. When the tilt angle component of 2 ° or less is less than 90%, when the antiglare film 1 is applied to a liquid crystal display device or the like, the blackness of the display surface tends to be lowered, and the visibility tends to be lowered.

  The uneven surface of the hard coat layer 12 preferably has an inclination angle distribution in which an inclination angle component of 1 ° or less is 40% or more. When the tilt angle component of 1 ° or less is less than 40%, the component of 3 ° or more increases and the component of 2 ° or less tends to decrease, resulting in a decrease in visibility.

  The 5 ° gain of reflected light in the antiglare film 1 is preferably 0.3 or less, more preferably 0.05 or less. When the 5 ° gain exceeds 0.3, the scattering range of the incident light on the antiglare film 1 becomes wide and tends to be whitish.

  The total light transmittance of the antiglare film 1 is preferably 90% or more. This is because if it is 90% or more, the amount of light from the backlight can be maintained without deteriorating the transparency of the substrate 11. The haze is preferably 5% or less. This is because if it is 5% or less, the scattering of backlight light and the scattering of surface reflected light can be suppressed, and black can be visually recognized as black. The haze is a sum of surface haze and internal haze.

  The internal haze is preferably 1% or more and 20% or less, more preferably 1% or more and 5% or less. If it is less than 1%, the uneven surface of the substrate 11 becomes smooth, and the effect of reducing glare tends to decrease. When it exceeds 20%, when the anti-glare film 1 is applied to the display device, the screen becomes whitish and visibility tends to be lost. When it is 5% or less, internal haze can be easily imparted only by forming the fine structure 11b. When the internal haze is greater than 5%, fine particles may be added to the hard coat layer 12 within a range that does not affect the surface shape of the hard coat layer 12.

  The 20 ° glossiness of the antiglare film 1 is preferably 20 or more and 78 or less. If it is less than 20, it tends to be whitish. On the other hand, if it exceeds 78, the antiglare property tends to be insufficient.

  The shape of the bottom surface of the protrusion 12a is preferably at least one of a circular shape, an elliptical shape, and a polygonal shape, and more preferably a polygonal shape. When the shape of the bottom surface of the protrusion 12a is at least one of a circular shape, an elliptical shape, and a polygonal shape, the surface inclination at a high angle tends to be reduced. When the shape of the bottom surface of the protrusion 12a is a polygonal shape, the filling rate of the protrusion 12a on the uneven surface of the hard coat layer 12 can be increased, the flat portion can be reduced, and the antiglare property can be increased.

(Base material)
The concavo-convex surface of the base material 11 is configured by forming a large number of structures 11a that are convex portions on the surface of the base material. A large number of structures 11a are preferably adjacent to each other from the viewpoint of improving the filling rate, but gaps 11b may be provided between the structures as shown in FIG.

  The substrate 11 is, for example, a plastic substrate having transparency. As the shape of the substrate 11, for example, a film having transparency can be used. Here, the film is defined to include a sheet. As a material of the base material 11, for example, a known polymer material can be used. Specific examples of known polymer materials include triacetyl cellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyimide (PI), polyamide (PA), aramid, polyethylene (PE), poly Examples include acrylate, polyether sulfone, polysulfone, polypropylene (PP), diacetyl cellulose, polyvinyl chloride, acrylic resin (PMMA), polycarbonate (PC), epoxy resin, urea resin, urethane resin, and melamine resin. The thickness of the substrate 11 is preferably 38 to 100 μm from the viewpoint of productivity, but is not particularly limited to this range.

(Structure)
FIG. 3 is a plan view showing an example of the shape of the uneven surface of the substrate 11. As shown in FIG. 3, on the surface of the substrate 11, the structures 11a that are convex portions are irregularly (randomly) formed. The structure 11a is preferably formed irregularly two-dimensionally or three-dimensionally. This is because the surface of the hard coat layer 12 can be irregularly irregularly formed two-dimensionally or three-dimensionally by forming the surface of the hardcoat layer that follows the uneven surface of the substrate 11. . Moreover, it is preferable that the size of the bottom surface of the structure 11a changes irregularly. This is because the period of the concavo-convex shape (swell) on the surface of the hard coat layer can be irregularly changed by forming such a hard coat layer surface that follows the concavo-convex surface of the substrate 11. Here, the two-dimensional irregularity means that the structures 11a or irregularities are irregularly formed in the in-plane direction of the antiglare film 1 or the substrate 11. The three-dimensional irregularity means that the structures 11a or irregularities are irregularly formed in the in-plane direction of the antiglare film 1 or the substrate 11, and the antiglare film 1 or the substrate 11 is irregular. In the thickness direction, the structure 11a or irregularities are irregularly formed.

  The structure 11a preferably has a side surface extending from the top to the bottom of the structure 11a. When it has such a shape, it is preferable that the bottom surfaces of the adjacent structures 11a are in contact with each other or substantially in contact with each other. Examples of the shape of the structure 11a that is the concave portion or the convex portion include a dome shape, a cone shape, and a column shape. However, the shape is not limited to these shapes, and may be arbitrarily set according to desired optical characteristics. You can choose. Examples of the dome shape include a hemispherical shape and a semi-elliptical spherical shape. Examples of the cone shape include a cone shape with a sharp tip, a cone shape with a curvature at the tip, and a cone shape with the tip cut off. Specific examples include a cone shape, a truncated cone shape, an elliptical cone shape, an elliptical truncated cone shape, a polygonal pyramid shape, and a polygonal truncated cone shape. Examples of the shape of the polygonal pyramid include a quadrangular pyramid, a hexagonal pyramid, and an octagonal pyramid. Examples of the columnar shape include a columnar shape and a polygonal columnar shape. Examples of the shape of the polygonal column include a quadrangular column, a hexagonal column, and an octagonal column. In addition, shape anisotropy may be imparted to the structure 11a. From the viewpoint of adjusting the optical characteristics in the horizontal direction and the vertical direction of the display device, for example, in two orthogonal directions among the in-plane directions of the substrate 11 It is preferable to impart shape anisotropy. Specifically, examples of the shape of the structure 11a having shape anisotropy include an elliptical columnar shape, a semi-elliptical spherical shape, an elliptical truncated cone shape, and a polygonal columnar shape or a polygonal pyramid shape extended in one direction.

  The shape of the bottom surface of the structure 11a is preferably at least one of a circular shape, an elliptical shape, and a polygonal shape, and more preferably a polygonal shape. Thereby, when the hard coat layer 12 is formed by following the unevenness of the base material 11, the bottom surface shape of the protrusion 12a of the hard coat layer 12 can be at least one of a circular shape, an elliptical shape, and a polygonal shape. Because. Examples of the polygonal shape of the bottom surface of the structure 11a include a quadrangular shape, a hexagonal shape, and an octagonal shape. When the bottom surface of the structure 11a is an elliptical shape or a polygonal shape, the structure 11a is arranged on the substrate surface so that the bottom surface shape of the structure 11a is aligned in the same direction, for example. Specifically, when the bottom surface of the structure 11a is elliptical, the long axis direction or the short axis direction is aligned in the same direction. When the bottom surface of the structure 11a is polygonal, the corners having the same angle are arranged so as to be aligned in the same direction. The shape of the bottom surface of the structure 11a is preferably selected according to desired characteristics. For example, when the shape of the bottom surface of the structure 11a is an elliptical shape, the major axis direction is smoother as compared with the minor axis direction, so that it is less susceptible to external light from the major axis direction. Therefore, the display screen can be prevented from becoming whitish. In addition, since the concave and convex shape is rough in the short axis direction as compared with the long axis direction, it is possible to ensure good antiglare properties. That is, when the bottom surface of the structure 11a is elliptical, the antiglare film 1 having high antiglare property and high contrast as a whole can be obtained.

It is preferable that the structure 11a satisfies the following relationships (1) to (3). It is because generation | occurrence | production of a moire can be suppressed and the anti-glare film 1 excellent in anti-glare property and contrast can be obtained.
(1) The size of bottoms of the structures 11a is, the minimum distance R _m or more, randomly varying within a maximum distance R _M or less.
(However, the minimum distance R _m : the shortest distance from the center of gravity of the bottom surface of the structure 11a to the periphery of the bottom surface, the maximum distance R _M : the maximum distance from the center of gravity of the bottom surface of the structure 11a to the periphery of the bottom surface)
(2) The bottom surfaces of the structures 11a are in contact with or substantially in contact with each other.
(3) The minimum distance R _m and the maximum distance R _M of the bottom surface of the structure 11a satisfy the relationship of R _m / R _M ≦ 0.9.
If the relationship (1) is not satisfied and the size of the bottom surface of the structure 11a does not change randomly, moire tends to occur. When the relationship (2) is not satisfied and the bottom surfaces of the structures 11a are not in contact with each other or are not substantially in contact with each other, the filling rate is lowered and the antiglare property tends to be lowered. If the relationship of (3) is not satisfied and R _m / R _M > 0.9, the arrangement becomes regular and moire tends to occur. Here, that the bottom surfaces of the structures 11a are substantially in contact with each other means that the distance between the bottom surfaces of the structures 11a is adjacent to each other within a range of 0 μm to 80 μm.

FIG. 4 shows a preferred range for the minimum distance R _m and the maximum distance R _M of the structure. As shown in FIG. 4, it is preferable to satisfy the relationship of R _m / R _M ≦ 0.9. The minimum distance R _m and the maximum distance R _M of the structure 11a are preferably in the range of R _m <R _M ≦ 75 μm, more preferably 10 μm ≦ R _m <R _M ≦ 75 μm. When the minimum distance R _m is less than 10 μm, the anti-glare property tends to increase when attempting to obtain anti-glare property, and the anti-glare property tends to decrease when attempting to suppress the opaque effect. That is, it tends to be difficult to achieve both antiglare properties and suppression of cloudiness. When the maximum distance R _M exceeds 75 μm, the surface tends to be rough, or the screen may be glaring when viewed from the screen.

Minimum distance if the R _m and the maximum distance R _M satisfy the relationship _{R m / R M ≦ 0.9,10μm ≦} R m <R M ≦ 75μm, the average irregularity height PV of the surface of the hard coat layer 12 is, 0 It is preferable that it is in the range of 15 μm ≦ PV ≦ 1.6 μm. When PV is less than 0.15 μm, antiglare properties tend not to be obtained. When PV exceeds 1.6 μm, the cloudiness increases and the cloudiness tends to exceed 0.64%. The turbidity is preferably 0.64% or less. This is because if it is 0.64% or less, the scattering of backlight light and the scattering of surface reflected light can be suppressed, and black can be visually recognized as black. PV shows the height between the highest point of the convex part (structure 11a) and the lowest point of the valley part formed between adjacent convex parts.

When the bottom surface of the structure 11a is circular, the minimum distance R _m is the minimum radius R _m and the maximum distance R _M is the maximum radius R _M in each of the above relationships. Further, the bottom surface of the structures 11a, if it is elliptical, the minimum distance R _m is the minimum value R _m of the short axis (short diameter), the maximum distance R _M is the long axis length (major axis) it is the maximum value R _M of.

(Hard coat layer)
The hard coat layer 12 is for imparting both the scratch resistance and the antiglare property to the surface of the substrate 11, that is, the surface of the polarizer to which the antiglare film 1 is applied and the screen of the display device. For example, it is a polymer resin layer harder than the substrate 11. The hard coat layer 12 is obtained by applying, drying and curing the resin composition on the uneven surface of the substrate 11. The hard coat layer 12 has a concavo-convex shape following the concavo-convex surface of the substrate 11 on the surface. This uneven shape is preferably a continuous wavefront that follows the uneven surface of the substrate 11. The concavo-convex shape is preferably a two-dimensional or three-dimensional irregular concavo-convex shape. It is because generation | occurrence | production of a moire can be suppressed. The positions of the concave and convex portions of the hard coat layer 12 preferably correspond to the positions of the concave and convex portions of the base material 11, respectively.

  The amount of unevenness on the surface of the hard coat layer is, for example, smaller than the amount of unevenness on the surface of the substrate, and the amount of unevenness tends to decrease as the hard coat layer is thickened. The cross section of the hard coat layer when cut in an arbitrary direction is preferably a continuous wave shape. Thereby, a smooth wave | undulation can be formed in the hard-coat layer surface, and light can be diffused by this wave | undulation. Here, the continuous wavefront means that the hard coat layer surface is smoothly connected without discontinuities or steps, and specifically, can be differentiated at any point on the hard coat layer surface. . It is preferable that the height of the protrusions 12a formed on the surface of the hard coat layer 12 is continuously changed in correlation with the size of the bottom surface. This is because the spectral phenomenon can be further suppressed by continuously changing the height of the protrusion 12a. When there is a spectroscopic phenomenon, when a distant fluorescent lamp is reflected, a rainbow pattern is generated around the fluorescent lamp.

The pencil hardness of the hard coat layer 12 is preferably H or higher, more preferably 2H or higher. If the pencil hardness is less than H, the function as a hard coat tends to decrease. It is preferable that the Martens hardness of the hard coat layer 12 is 270 or more and 600 or less. When the Martens hardness is less than 270, the pencil hardness is less than H and the function as a hard coat tends to be lowered. When the Martens hardness exceeds 600, flexibility after curing tends to decrease. The surface resistance of the hard coat layer 12 is preferably in the range of 1.0 × 10 ⁸ Ω / □ to 1.0 × 10 ¹³ Ω / □. When the surface resistance is less than 1.0 × 10 ⁸ Ω / □, the film hardness tends to decrease. On the other hand, when the surface resistance exceeds 1.0 × 10 ¹³ Ω / □, the antistatic function is lowered and the dustproof property tends to be insufficient.

[1.2. Manufacturing method of antiglare film]
Next, an example of a method for producing an antiglare film according to the first embodiment of the present invention will be described with reference to the flowchart shown in FIG. 5 and the process diagrams shown in FIGS.

(Plating process)
First, in step S1, if necessary, a plating process is performed on the surface of the master 21, which is a workpiece, to form a plating layer such as copper plating. Examples of the shape of the master 21 that is a workpiece include a plate shape, a sheet shape, a film shape, a block shape, a columnar shape, and a cylindrical shape. As the columnar or cylindrical master 21, for example, a heating roll such as an induction heating jacket roll, a heat medium circulation roll, or a heater built-in roll can be used.

(Resist layer formation process)
Next, in step S2, a resist layer 22 is formed on the surface of the master 21 (see FIG. 6A). As a material of the resist layer 22, for example, either an inorganic resist or an organic resist can be used. When the master 21 has a columnar shape or a cylindrical shape, it is preferable to form the resist layer 22 on the outer peripheral surface thereof.

(Exposure process)
Next, in step S3, for example, a plurality of exposed portions 22a having a predetermined exposure pattern are formed on the resist layer 22 by irradiating the resist layer 22 with laser light L1 (see FIG. 6B). Specifically, for example, a random pattern is generated, and the resist layer 22 is exposed based on the random pattern as described below. That is, the minimum distance R _m or more, the maximum distance with changing the size of the exposed portion 22a in the R _M the range randomly, while in contact or contact substantially exposed portion 22a with each other, the resist layer with a laser beam L1 22 Irradiate. Further, the minimum distance R _m and the maximum distance R _{M of} the exposure unit 22a are set to satisfy the relationship of R _m / R _M ≦ 0.9. However, the minimum distance R _{m is} the shortest distance from the center of gravity of the exposure unit 22a to the outer periphery, and the maximum distance R _M is the maximum distance from the center of gravity of the exposure unit 22a to the outer periphery. Examples of the shape of the exposure unit 22a include a circular shape, an elliptical shape, and a polygonal shape. Note that when the exposure portion 22a is a circular shape, the minimum distance R _m is the minimum radius R _m, the maximum distance R _M is the maximum radius R _M. Further, when the exposure unit 22a is elliptical, the minimum distance R _m is the minimum value R _m of the short axis (short diameter), the maximum value of the maximum distance R _M is the long axis length (major axis) it is an R _M. Further, it is preferable to further arrange a shape such as a circular shape in the gap of the shape constituting the random pattern.

(Development process)
Next, in step S4, the resist layer 22 formed with the plurality of exposed portions 22a is developed. Thereby, an opening 22b corresponding to the exposed portion 22a is formed in the resist layer 22 (see FIG. 6C). FIG. 7C shows an example in which a positive resist is used as the resist and the exposed portion 22a becomes the opening 22b. However, the resist is not limited to this example. That is, a negative resist may be used as the resist and the exposed portion 22a may be left.

  The minimum distance d between adjacent openings 22b is preferably 1 μm or more and (D2 × 4) μm or less. Here, D2 is an etching depth (amount) by re-etching (second etching process). When the minimum distance is less than 1 μm, the walls between the recesses having a columnar shape or the like are broken and connected at the time of re-etching, so that flat portions increase and the antiglare property tends to decrease. When the minimum distance exceeds (D2 × 4) μm, even if the entire surface of the master disk 21 is re-etched, the flat portion is increased and the antiglare property tends to decrease.

(Etching process)
Next, in step S5, an etching process (first etching process) is performed on the surface of the master 21 using the resist layer 22 in which the plurality of openings 22b are formed as an etching mask. Thereby, the some recessed part 21a which has a column shape etc. is formed in the surface of the original recording 21, for example (refer FIG. 7A). In addition, a large number of transfer microstructures 21b can be formed on the surface of the master 21 by adjusting the etching conditions during the etching process.

  As the etching, for example, both dry etching and wet etching can be used, but it is preferable to use wet etching in view of simple equipment. As the etching, for example, both isotropic etching and anisotropic etching can be used, and it is preferable to select appropriately according to the desired shape of the structure 11a. The depth D1 of the etching process is preferably 0.5 μm or more and 10 μm or less. If it is less than 0.5 μm, it is necessary to reduce the film thickness of the hard coat layer 12 in order to maintain the antiglare property, and the pencil hardness tends to decrease. Or, by the re-etching process, the depth of the concave portion becomes shallow, or the flat portion increases, and the antiglare property tends to decrease. On the other hand, if the thickness exceeds 10 μm, it is necessary to increase the thickness of the hard coat layer 12 in order to produce a rough feeling after applying the hard coat paint or to suppress white turbidity, and the curl tends to increase. In addition, the transfer speed tends to decrease and productivity tends to decrease. As an etchant, for example, a cupric chloride etchant (cupric chloride, hydrochloric acid, water) can be used, but is not limited thereto.

(Resist stripping process)
Next, in step S6, the resist layer 22 formed on the substrate surface is removed by ashing or the like (see FIG. 7B). Thereby, the several recessed part 21a is formed in the base-material surface. That is, an uneven surface is formed on the surface of the master.

(Re-etching process)
Next, in step S7, a re-etching process (second etching process) is performed on the entire concave / convex surface of the master 21 as necessary. As a result, the plurality of recesses 21a formed on the surface of the master 21 are changed from, for example, a columnar shape to a gentle dome shape, and a master 23 having a smooth uneven surface is obtained (see FIG. 7C). The smooth uneven surface is preferably a continuous wavefront. This is because it is possible to achieve both excellent antiglare properties and contrast. The uneven surface of the master 23 is a reverse of the uneven surface of the substrate 11.

  The depth D2 of this re-etching is preferably (D1 × 0.6) μm or more and (D1 × 2) μm or less. If it is less than (D1 × 0.6) μm, the formation of a dome shape or the like is insufficient, a flat portion remains, there is a linear inclination, and the improvement of antiglare property tends to be insufficient. On the other hand, when it exceeds (D1 × 2 μm), the depth of the concave portion becomes too shallow, or the flat portion increases, and the antiglare property tends to decrease.

(Plating process)
Next, in step S8, the uneven surface of the master 23 is plated as necessary to form a plating layer (not shown) such as nickel plating or chrome plating. By forming the plating layer in this way, it is possible to improve wear durability for long-term use. In addition, it is preferable that the plating process is appropriately adjusted so that fine irregularities due to a large number of transfer microstructures 21b are also maintained on the surface of the master after the plating process.

(Shape transfer process)
Next, in step S9, the master 23 is pressed against the smooth surface of the base 11 and the base 11 is heated to transfer the uneven shape of the master 23 to the base 11 (see FIG. 7D). . At this time, it is preferable to appropriately adjust the transfer conditions so that a large number of transfer microstructures 21 b are also transferred to the substrate 11.

(Coating process)
Next, in step S10, a resin composition (hereinafter also referred to as a paint as appropriate) 13 is applied onto the uneven surface of the substrate 11 (see FIG. 8A). The coating method is not particularly limited, and a known coating method can be used. Known coating methods include, for example, micro gravure coating method, wire bar coating method, direct gravure coating method, die coating method, dip method, spray coating method, reverse roll coating method, curtain coating method, comma coating method, knife coating. Method, spin coating method and the like.

(Resin composition)
As a resin composition, what has the characteristic that a viscosity rises and fluidity | liquidity is lost in the drying process (step S11) which is a post process is preferable. This is because the resin composition can follow the uneven surface of the substrate 11 in the drying step, which is a subsequent step. From the viewpoint of ease of production, the resin composition is preferably an ionizing radiation curable resin that is cured by light or an electron beam, or a thermosetting resin that is cured by heat. As the ionizing radiation curable resin, a photosensitive resin composition curable by light is preferable, and an ultraviolet curable resin composition curable by ultraviolet light is most preferable. The ionizing radiation curable resin or thermosetting resin preferably contains a viscosity modifier and a solvent. It is because a resin composition can be made to follow the uneven surface of the base material 11 in the drying process which is a post process by including these materials.

(UV curable resin composition)
The ultraviolet curable resin composition includes, for example, a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic viscosity modifier, an ionic liquid, and a solvent. Contains. Moreover, it is preferable that the ultraviolet curable resin composition further contains an organic viscosity modifier from the viewpoint of improving the shape followability of the coating film in the drying step described later. Moreover, it is preferable that the ultraviolet curable resin composition further contains an antifouling agent from the viewpoint of imparting antifouling properties. Moreover, it is preferable that an ultraviolet curable resin composition further contains a leveling agent from a viewpoint of the wettability improvement to the base material 11. FIG. In addition, the ultraviolet curable resin composition preferably further contains an antistatic agent from the viewpoint of imparting an antistatic function to the antiglare film 1. Moreover, you may make it an ultraviolet curable resin composition further contain the organic or inorganic filler which provides an internal haze to a hard-coat as needed. Thus, when a filler is contained, it is preferable that the refractive index difference of a filler and a matrix is 0.01 or more. The average particle size of the filler is preferably 0.1 to 1 μm. Moreover, you may make it an ultraviolet curable resin composition further contain a light stabilizer, a ultraviolet absorber, a flame retardant, antioxidant, etc. as needed.

  Hereinafter, an acrylate, a photopolymerization initiator, an inorganic viscosity modifier, an organic viscosity modifier, a solvent, an antistatic agent, an antifouling agent, and a leveling agent will be sequentially described.

(Acrylate)
As the acrylate, it is preferable to use a monomer and / or an oligomer having two or more (meth) acryloyl groups. As this monomer and / or oligomer, for example, urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, polyol (meth) acrylate, polyether (meth) acrylate, melamine (meth) acrylate and the like are used. be able to. Here, the (meth) acryloyl group means either an acryloyl group or a methacryloyl group. Here, the oligomer refers to a molecule having a molecular weight of 500 or more and 60000 or less.

(Photopolymerization initiator)
As the photopolymerization initiator, those appropriately selected from known materials can be used. As a known material, for example, a benzophenone derivative, an acetophenone derivative, an anthraquinone derivative, or the like can be used alone or in combination. The blending amount of the polymerization initiator is preferably 0.1% by mass or more and 10% by mass or less in the solid content. If it is less than 0.1% by mass, the photocurability is lowered, which is substantially unsuitable for industrial production. On the other hand, when it exceeds 10 mass%, when the amount of irradiation light is small, odor tends to remain in the coating film. Here, solid content means all components other than a solvent and an organic viscosity modifier. Specifically, for example, acrylate, photopolymerization initiator, inorganic oxide filler, antistatic agent, leveling agent, antifouling agent, and the like are referred to as solid content.

(Inorganic viscosity modifier)
As the inorganic viscosity modifier, for example, an inorganic oxide filler can be used. Examples of the inorganic oxide filler include silica, alumina, zirconia, antimony pentoxide, zinc oxide, tin oxide, indium tin oxide (ITO), indium oxide, and antimony-doped tin oxide: ATO), aluminum zinc oxide (AZO), and the like can be used. The surface of the inorganic oxide filler is preferably surface-treated with an organic dispersant having a functional group such as a (meth) acryl group, a vinyl group, or an epoxy group at the terminal. Thereby, the filler is integrated with the surrounding (meth) acrylic monomer / oligomer in the coating film curing step, and the coating film hardness and flexibility are improved.

  As the organic dispersant, for example, a silane coupling agent having the above functional group at the terminal is suitable. Examples of the silane coupling agent having an acryl group at the terminal include KBM-5103 manufactured by Shin-Etsu Chemical Co., Ltd. Examples of the silane coupling agent having a methacryl group at the terminal include KBM-502, KBM-503, KBE-502, and KBE-503 manufactured by Shin-Etsu Chemical Co., Ltd. Examples of the silane coupling agent having a vinyl group at the terminal include KA-1003, KBM-1003, and KBE-1003 manufactured by Shin-Etsu Chemical Co., Ltd. Examples of the silane coupling agent having an epoxy group at the terminal include KBM-303, KBM-403, KBE-402, and KBE-403 manufactured by Shin-Etsu Chemical Co., Ltd. In addition to the silane coupling agent, an organic carboxylic acid may be used. By using the inorganic oxide filler surface-treated in this way, in the curing step of the coating film described later, the inorganic oxide filler is integrated with an acrylate such as a (meth) acrylic monomer and / or oligomer around it, The coating film hardness and flexibility are improved.

  The inorganic oxide filler preferably has an OH group or the like on its surface. As a result, in the process of drying the coating film, which will be described later, in the process of evaporation of the solvent, the OH groups on the surface of the inorganic oxide filler and the functional groups possessed by the organic viscosity modifier are bonded with hydrogen bonds or coordinate bonds. , The viscosity of the paint increases, and preferably the paint gels. As the viscosity increases in this way, the paint follows the uneven shape of the base material 11, and an uneven shape that follows the uneven shape of the base material 11 is formed on the surface of the paint.

  The average particle diameter of the inorganic oxide filler is, for example, 1 nm or more and 100 nm or less. The inorganic oxide filler content is preferably 10% by mass or more and 70% by mass or less in the solid content. The total solid content is 100% by mass. If it is less than 10% by mass, the system will not increase in viscosity in the process of solvent evaporation, or the amount of organic viscosity modifier necessary for increasing the viscosity will be too large, resulting in turbidity in the paint or coating film hardness. There is a tendency to deteriorate. On the other hand, when it exceeds 70 mass%, there exists a tendency for the flexibility of a cured film to fall.

(Organic viscosity modifier)
Inorganic and organic viscosity modifiers are preferably used in combination. It is because shape followability will increase when both are used together. Examples of organic viscosity modifiers include hydroxy groups (OH groups), carboxyl groups (COOH groups), urea groups (—NH—CO—NH—), amide groups (—NH—CO—), amino groups ( A molecule having an NH ₂ ) group can be used, and a molecule having two or more functional groups selected from these functional groups is preferably used. From the viewpoint of suppressing the aggregation of the inorganic oxide filler, it is preferable to use a molecule having a carboxyl group as the organic viscosity modifier. It is also possible to apply known anti-sagging agents and anti-settling agents. Examples of organic viscosity modifiers include BYK-405, BYK-410, BYK-411, BYK-430, BYK-431 manufactured by Big Chemie Japan Co., Ltd., Talen 1450, Talen 2200A manufactured by Kyoeisha Chemical Co., Ltd. Talen 2450, Floren G-700, Floren G-900 and the like are preferable. It is preferable that the compounding quantity of an organic viscosity modifier is 0.001-5 mass parts with respect to 100 mass parts of all the coating materials. It is preferable that the optimum blending amount is appropriately selected according to the material type and blending amount of the inorganic oxide filler, the material type of the organic viscosity modifier, and the desired hard coat film thickness.

(solvent)
The solvent is preferably a solvent that dissolves a resin raw material such as acrylate to be used, has good wettability with the base material 11, and does not whiten the base material 11. Examples of such solvents include acetone, diethyl ketone, dipropyl ketone, methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, cyclohexanone, methyl formate, ethyl formate, propyl formate, isopropyl formate, butyl formate, methyl acetate, and ethyl acetate. , Ketones such as propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, sec-butyl acetate, amyl acetate, isoamyl acetate, sec-amyl acetate, methyl propionate, ethyl propionate, methyl butyrate, ethyl butyrate, methyl lactate or Carboxylic acid esters, methanol, ethanol, isopropanol, n-butanol, sec-butanol, tert-butanol and other alcohols, tetrahydrofuran, 1,4-dioxane, 1,3-dioxolane It can be mentioned ethers. These solvents may be used singly or as a mixture of two or more components. Furthermore, solvents other than those exemplified above can be added as long as the performance of the resin raw material is not impaired.

(Antistatic agent)
As described above, the resin composition preferably further contains an antistatic agent. An ionic liquid can be used as the antistatic agent. Here, the ionic liquid refers to a molten salt (ionic compound) that is liquid at room temperature (for example, 25 ° C.).

(Ionic liquid)
As for the compounding quantity of an ionic liquid, 10 mass% or more and 25 mass% or less are preferable with respect to the total solid of a resin composition. Here, the total solid content of the resin composition is 100% by mass. When the blending amount of the ionic liquid is less than 10% by mass, sufficient antistatic performance tends to be not exhibited in the coating film. On the other hand, when the blending amount of the ionic liquid exceeds 25% by mass, the coating film hardness tends to decrease.

  Examples of ionic liquids include cations such as imidazolium (system), pyridium (system), pyrrolidinium (system), guanidinium (system), isouronium (system), quaternary ammonium (system), and quaternary phosphonium (system). In general, for these cationic substances, those present in the form of salts (liquids) bonded to counter ions, such as halogen, triflate, tetrafluoroborate, hexafluorophosphate, etc. Can be mentioned. The ionic liquid is preferably an ionic liquid that is insoluble in water from the viewpoint of improving durability in a high-humidity environment.

  In the present invention, among ionic liquids, imidazolium (based) and pyridium (based) substances and salts thereof can be preferably used. Specific examples of imidazolium (based) substances and salts thereof (counter ions indicate counter ions) are 1,3-dimethylimidazolium “chloride” and 1,3-dimethylimidazolium “dimethyl phosphate”. 1-ethyl, 3-methylimidazolium “chloride”, 1-ethyl, 3-methylimidazolium “bromide”, 1-ethyl, 3-methylimidazolium “iodide”, 1-ethyl, 3-methylimidazolium “ Trifluoromethanesulfonate ", 1-ethyl, 3-methylimidazolium" p-toluenesulfonate ", 1-ethyl, 3-methylimidazolium" ethyl sulfate ", 1-ethyl, 3-methylimidazolium" 2 -Methyl (2-methoxyethoxy) ethyl sulfate ", 1-ethyl, 3- Tyrimidazolium “dicinanamide”, 1-ethyl, 3-methylimidazolium “tetrafluoroborate”, 1-ethyl, 3-methylimidazolium “hexafluorophosphate”, 1-ethyl, 3-methylimidazolium “ Bis (trifluoromethanesulfonyl) imide ”, 1-methyl, 3-propylimidazolium“ iodide ”, 1-butyl, 3-methylimidazolium“ chloride ”, 1-butyl, 3-methylimidazolium“ bromide ”, 1-butyl, 3-methylimidazolium “iodide”, 1-butyl, 3-methylimidazolium “trifluoromethanesulfonate”, “, 1-butyl, 3-methylimidazolium“ hexafluorophosphate ”, 1- Butyl, 3-methylimidazolium “bis (triflu L-methanesulfonyl) imide ", 1-butyl, 3-methylimidazolium" tetrachloroferrate ", 1-hexyl, 3-methylimidazolium" chloride ", 1-hexyl, 3-methylimidazolium" hexafluorophos Hate, 1-hexyl, 3-methylimidazolium “tetrafluoroborate”, 1-butyl, 2,3-dimethylimidazolium “chloride”, 1-butyl, 2,3-dimethylimidazolium “tetrafluoroborate”, 1-butyl, 2,3-dimethylimidazolium “hexafluorophosphate”, 1-ethyl, 3-methylimidazolium “trifluoromethanesulfonate” and the like are preferable, and high ion conductivity and stability are preferable. 1-butyl-3-methylimidazolium “ Tetrafluoroborate ".

  Specific examples of pyridinium (system) substances and salts thereof (counter ions in the parentheses of the substances indicate 1-ethylpyridinium “chloride”, 1-ethylpyridinium “bromide”, 1-butylpyridinium “chloride”) )), 1-butylpyridinium “bromide”, 1-butylpyridinium “hexafluorophosphate”, 1-butyl-4-methylpyridinium “bromide”, 1-butyl-4-methylpyridinium “hexafluorophosphate”, 1 -Ethyl-3-methylpyridinium “ethyl sulfate”, 1-ethyl-3- (hydroxymethyl) pyridinium “ethyl sulfate”, 1-ethyl-3- (hydroxy) cimethyl) pyridinium “ethyl sulfate” and the like.

(Other antistatic agents)
An ionic liquid may be used in combination with another antistatic agent. Examples of the antistatic agent other than the ionic liquid include quaternary ammonium salts, conductive polymers, conductive fine particles, and the like, and it is particularly preferable to use them in combination with the conductive polymer. One or two or more of these antistatic agents other than these ionic liquids can be used in combination with the ionic liquid.

  As the quaternary ammonium salt, a compound having a quaternary ammonium base in the molecule is preferably used. As the compound having a quaternary ammonium base in the molecule, a monomer and / or oligomer having one or more quaternary ammonium bases and one or more (meth) acryloyl groups may be used. preferable. An antistatic function can be imparted to the hard coat layer 12 by the quaternary ammonium base in the molecule. In addition, since the monomer and / or oligomer has a (meth) acryloyl group, it is integrated with a matrix resin or the like by ultraviolet irradiation. Thereby, bleed-out of the quaternary ammonium salt is suppressed.

  Examples of the compound having a quaternary ammonium base in the molecule include methacryloyloxyethyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, acryloylaminopropyltrimethylammonium chloride, methacryloylaminopropyltrimethylammonium chloride, acryloyloxyethyldimethylbenzylammonium chloride. , Methacryloyloxyethyldimethylbenzylammonium chloride, methacryloylaminopropyldimethylbenzylammonium chloride, methacryloyloxyethyltrimethylammonium methylsulfate, methacryloylaminopropyltrimethylammonium methylsulfate, methacryloyloxyethyldimethyl Le ethylammonium ethyl sulfate, methacryloyl aminopropyl dimethyl ethyl ammonium ethylsulfate, methacryloyloxyethyl trimethyl ammonium p- toluenesulfonate, and the like methacryloylamino trimethylammonium p- toluenesulfonate.

  Examples of the conductive polymer include substituted or unsubstituted polyaniline, polypyrrole, polythiophene, and one or two (co) polymers selected from these. In particular, polypyrrole, polythiophene, poly N-methylpyrrole, poly-3-methylthiophene, poly-3-methoxythiophene, poly (3,4-ethylenedioxythiophene), and one or two selected from these (co-) Polymers are preferred.

  As the conductive polymer, it is preferable to select a polymer having good compatibility with the ultraviolet curable resin composition. When the compatibility is poor, the amount of the conductive polymer necessary for obtaining the desired antistatic performance increases, leading to deterioration of mechanical properties, coloring (transparency deterioration), and the like.

  It is preferable that a conductive polymer contains a dopant from a viewpoint of an electroconductive improvement. Examples of the dopant include halogen compounds, Lewis acids, and protonic acids. Specific examples include organic acids such as organic carboxylic acids and organic sulfonic acids, organic cyano compounds, fullerenes, hydrogenated fullerenes, carboxylic fullerenes, and sulfonated fullerenes. A polyethylene dioxythiophene solution doped with polystyrene sulfonic acid is preferable in that it has a relatively high thermal stability and a low degree of polymerization, and thus is advantageous in transparency after coating film formation.

(Anti-fouling agent)
As described above, the resin composition preferably further contains an antifouling agent. As the antifouling agent, it is preferable to use a silicone oligomer and / or a fluorine-containing oligomer having one or more (meth) acryl groups, vinyl groups, or epoxy groups. When it is necessary to impart alkali resistance to the antiglare film 1, it is preferable to use a fluorine-containing oligomer. It is preferable that the compounding quantity of the said silicone oligomer and / or a fluorine oligomer is 0.01 to 5 mass% of solid content. If it is less than 0.01% by mass, the antifouling function tends to be insufficient. On the other hand, when it exceeds 5 mass%, there exists a tendency for coating-film hardness to fall. Examples of the antifouling agent include RS-602 and RS-751-K manufactured by DIC Corporation, CN4000 manufactured by Sartomer, Optool DAC-HP manufactured by Daikin Industries, Ltd., and X-22 manufactured by Shin-Etsu Chemical Co., Ltd. It is preferable to use -164E, FM-7725 manufactured by Chisso Corporation, EBECRYL350 manufactured by Daicel-Cytec Corporation, TEGORad2700 manufactured by Degussa Corporation, and the like.

(Leveling agent)
As described above, the ultraviolet curable resin composition preferably further contains a known leveling agent from the viewpoint of improving wettability to the substrate 11. The blending amount of the leveling agent is preferably 0.01% by mass or more and 5% by mass or less of the solid content. If it is less than 0.01% by mass, the wettability tends to be insufficiently improved. When it exceeds 5 mass%, there exists a tendency for coating-film hardness to fall.

(Drying process)
Next, in step S <b> 11, the solvent is volatilized by drying the resin composition 13 coated on the uneven surface of the substrate 11. The drying conditions are not particularly limited, and may be natural drying or artificial drying that adjusts the drying temperature, drying time, and the like. However, when wind is applied to the surface of the paint at the time of drying, it is preferable not to generate a wind pattern on the surface of the coating film. Further, the drying temperature and drying time can be appropriately selected depending on the boiling point of the solvent contained in the paint. In that case, it is preferable to select the drying temperature and the drying time in a range in which the base material 11 is not deformed by heat shrinkage in consideration of the heat resistance of the base material 11.

  In the process of evaporating the solvent, for example, the viscosity increases due to the action of the inorganic oxide filler and the ionic liquid contained in the resin composition, thereby increasing the viscosity. Under the present circumstances, it is preferable that solid content of the resin composition 13 gelatinizes by high viscosity. When the resin composition 13 contains an inorganic oxide filler (inorganic viscosity modifier) and an organic viscosity modifier, these viscosity modifiers are also high in viscosity of the resin composition 13. Contributes to That is, when the resin composition 13 contains these viscosity modifiers, for example, the solid content concentration of the resin composition 13 increases in the process of evaporation of the solvent, and the inorganic oxide filler and the organic viscosity modifier are increased. And form a network through bonds such as hydrogen bonds or coordination bonds in the system. Thereby, the viscosity of the resin composition 13 increases and the viscosity is increased. Thus, the resin composition 13 becomes highly viscous, preferably gelled, so that the uneven shape of the substrate 11 remains on the surface 13s of the dried resin composition (see FIG. 8B). That is, moderate smoothness is formed on the surface 13s of the dried resin composition, and antiglare properties are exhibited. Moreover, it is preferable that the fluidity | liquidity of the resin composition 13 is lost by the above-mentioned high viscosity. As described above, when the viscosity of the resin composition is increased during the solvent evaporation process, the resin composition after drying follows the uneven shape of the base material 11 and exhibits anti-glare properties. On the other hand, when the resin composition does not increase in viscosity, the uneven shape of the substrate 11 is crushed by the dried resin composition, and the antiglare property cannot be obtained.

(Curing process)
Next, in step S12, the resin composition 13 dried on the uneven surface of the substrate 111 is cured by, for example, ionizing radiation irradiation L2 or heating. Thereby, the hard coat layer 12 having a smooth uneven shape is formed (see FIG. 8C). As the ionizing radiation, for example, an electron beam, an ultraviolet ray, a visible ray, a gamma ray, an electron beam or the like can be used, and an ultraviolet ray is preferable from the viewpoint of production equipment. The integrated dose is preferably selected as appropriate in consideration of the curing characteristics of the resin composition 13 and the suppression of yellowing of the resin composition 13 and the substrate 11. Moreover, it is preferable to select suitably as atmosphere of irradiation according to the kind of resin composition, For example, the atmosphere of inert gas, such as air, nitrogen, and argon, is mentioned.
Thus, the intended antiglare film 1 is obtained.

  In addition, the formation method of the base pattern (uneven pattern of the base material 11) may be any method as long as it has projection diameter distribution selectivity, random arrangement, height controllability, projection shape (tilt) controllability, and the like. It is not limited to the forming method. For example, after applying a resist on a metal mold, a computer-generated random pattern is ablated and removed by laser light, and a protrusion is formed on a metal mold roll by an etchant that dissolves the metal. Further, it is also possible to use a method in which this laser etching technique is repeated in multiple stages using a pattern obtained by incrementing / decrementing the diameter of the base pattern. After pattern formation by these methods, the inclination can be made gentle by peeling the resist and etching the whole.

  When a random pattern is generated by a computer, if the diameter distribution of the circular pattern is narrowed or the arrangement between patterns is restricted in order to increase the pattern density, the randomness will be reduced, and the moire will be reduced when applied to a display device. Although not generated, the reflected light tends to be dispersed. For this reason, it is preferable that the circular pattern has a wide diameter distribution and that there is no restriction on arrangement. For example, the diameter distribution of the circular pattern is preferably 150 μm or less, more preferably 20 μm or more and 150 μm or less. By selecting the diameter distribution range of such a circular pattern, the maximum value of the autocorrelation function can be suppressed to 0.1 or less, and the spectral phenomenon can be reduced. The diameter distribution on the bottom surface of the structure of the base material 11 is substantially the same as that of the circular pattern generated by the computer described above.

  In order to achieve desired diffuse reflection angle characteristics, it is preferable to adjust the etching depth of the mold and the total etching time after the resist is removed. In addition, it is preferable to apply a resin whose shape following property is adjusted by adding an inorganic filler, an organic viscosity modifier, or the like on the uneven surface of the substrate 11 while adjusting the film thickness.

  Here, the depth D1 of the first etching process refers to the deepest value among the concave structures formed on the surface of the master by the first etching process. Usually, D1 is determined by the etching rate of the etching solution and the etching processing time. When the same etching solution is used and the etching amount is not so large, D1 increases in proportion to the etching processing time Te1.

When the first etching processing depth D1 is obtained by etching at the processing time Te1, the etching rate of this etching solution can be defined as D1 / Te1.
The second etching process is performed by etching the entire surface of the roll for a specific time Te2 using the etching solution having the etching rate D1 / Te1 obtained as described above. At this time, a value obtained by multiplying the etching rate D1 / Te1 by Te2 is defined as a depth D2 of the second etching process (D2 = (D1 / Te1) × Te2).

  As described above, the ultraviolet curable resin composition according to the first embodiment includes a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, Contains ionic liquid. Accordingly, in the drying process, the viscosity of the ultraviolet curable resin composition is increased by the action of the inorganic oxide filler and the ionic liquid contained in the ultraviolet curable resin composition, and the viscosity is increased. Follows the uneven surface of the substrate 11. At this time, it is presumed that the inorganic filler contributes to gelation and the ionic liquid contributes to the increase in viscosity in the solvent evaporation process. Therefore, a concavo-convex shape following the concavo-convex surface of the substrate 11 is formed on the surface of the hard coat layer, and an antiglare property is obtained. Moreover, antistatic property is expressed in the hard coat layer 12 by the ionic liquid. Therefore, excellent antiglare properties and antistatic properties can be obtained without complicating the manufacturing process.

  In addition, when an etching process is performed on the surface of the master using an etching mask, the etching mask is removed, and a re-etching process is performed on the entire surface of the master, so that a master 23 having smooth unevenness is produced. be able to. By applying, drying, and curing a hard coat paint that loses fluidity by drying on the base material formed by the master 23, the hard coat layer 12 that follows the irregularities of the base material surface is formed. . Therefore, the antiglare film 1 satisfying both high antiglare and low cloudiness characteristics can be obtained.

  Moreover, the uneven | corrugated shape on the surface of a hard-coat layer can be adjusted by adjusting the coating thickness of the hard-coat layer 12, and / or the followability of the resin composition for forming the hard-coat layer 12. Accordingly, the antiglare property of the antiglare film 1 can be easily adjusted. That is, the anti-glare film 1 that can be easily produced in a variety of products can be provided.

  In order to form a coating film that conforms to the uneven shape of the substrate 11, it is necessary that the solid content concentration of the resin composition is increased in the process of evaporation of the solvent, and the viscosity is increased, preferably gelled. . When the viscosity is not increased in this way, the coating film cannot be made to follow the uneven shape of the base material 11, and the uneven shape of the base material 11 is buried by the coating film, so that the antiglare property cannot be obtained. .

<2. Second Embodiment>
[2.1. Composition of antiglare film]
FIG. 9: is a top view which shows an example of the shape of the uneven surface of the base material with which the anti-glare film which concerns on the 2nd Embodiment of this invention is equipped. As shown in FIG. 9, the antiglare film according to the second embodiment is the first embodiment in that the structure 11a includes a _first structure 11a ₁ and a second structure 11a _2. Is different.

The size of the bottom surface of the first structure 11a ₁ randomly changes within the range of 10 μm ≦ R _1m <R _1M ≦ 75 μm, and the size of the bottom surface of the _second structure 11a ₂ is R _2m <R. It is preferable to change randomly within the range of _2M ≦ R _1m . However, the minimum distance R _1m : the shortest distance from the center of gravity of the bottom surface of the first structure 11 a ₁ to the periphery of the bottom surface, the maximum distance R _1M : from the center of gravity of the bottom surface of the _first structure 11 a ₁ to the periphery of the bottom surface Is the maximum distance. The minimum distance R _2m: from the center of gravity of the second bottom of the structure 11a _2, the shortest distance to the periphery of the bottom surface, the maximum distance R _2M: from a second center of gravity of the bottom of the structure 11a _2, to the periphery of the bottom surface Is the maximum distance. When 10 μm> R _{1 m} , the corresponding structure is approximately flattened, and the surface tends to be rough. When R _1M > 75 μm, the surface is rough, or when the screen is viewed, it is glaring.

With second structures 11a ₂ are arranged in the gap between the first structures 11a _1, the minimum value h ₁ of the heights of the first structures 11a _1, and the second structures 11a ₂ When the maximum height h ₂ satisfies the relationship of h ₁ ≧ h ₂ , the sizes of the bottom surfaces of the first structure 11a ₁ and the second structure 11a ₂ change as follows. It is preferable. That is, the size of the bottom surface of the first structure 11a ₁ is randomly changed within the range of R _1m <R _1M ≦ 75 μm, and the size of the bottom surface of the _second structure 11a ₂ is R _2m <R. It is preferable to change randomly within the range of _2M ≦ R _1m . When R _1M > 75 μm, the surface is rough, or when the screen is viewed, it is glaring.

The minimum height h _{1 of} the first structure 11a ₁ and the maximum height h _{2 of} the second structure 11a ₂ satisfy the relationship of h ₁ ≧ h ₂ , and the first structure It is preferable that the heights of 11a ₁ and second structure 11a ₂ vary. By doing in this way, the height of the structure 11a varies according to the size of the diameter of the structure 11a, and the surface of the optical element can be given a three-dimensional random surface shape. As a result, it is possible to suppress the rainbow pattern of reflected light, that is, the spectroscopic phenomenon that occurs when the heights of the structures 11a are aligned.

[2.2. Manufacturing method of antiglare film]
The manufacturing method of the anti-glare film which concerns on this 2nd Embodiment differs from the thing of 1st Embodiment except the point provided with the exposure process shown below. First, similarly to the above-described first embodiment, an exposure portion corresponding to the _first structure 11a ₁ is formed. Next, an exposure unit corresponding to the _second structure 11a ₂ is disposed in the gap between the exposure units.

In the following, the recesses for forming the first structure 11a ₁ and the second structure 11a ₂ are respectively referred to as the first recess (first transfer structure) and the second recess (first 2 transfer structure).
When the master is manufactured by the etching process, the depths of the first recess and the second recess are (1) the size of the bottom surface of the recess, (2) the interval between the bottom surfaces of the adjacent recesses, and (3) adjacent. It tends to vary depending on the size of the bottom surface of the recess and (4) other master processing conditions. Therefore, when the master is produced by the etching process, the depths of the first and second recesses are intentionally varied by appropriately adjusting the conditions (1) to (4). Can do. In particular, by setting the maximum value R _M of the bottom radius of the second recess to be equal to or less than the minimum value R _m of the bottom radius of the first recess, the depth of the second recess is made larger than the depth of the first recess. Can be set shallow. Incidentally, these first recess, and a second recess when transferred to the film, it is possible to form the first structure 11a _1, and second structures 11a ₂ on the film.

The heights of the first structure 11a ₁ and the second structure 11a ₂ on the base material side are also intentionally according to the depth variation of the first recess and the second recess on the master side described above. Variations can be produced. Thereby, as anti-glare film 1, what is called spectroscopic phenomenon in which reflected light turns into a rainbow-like state can be controlled.

  Moreover, the density of the recessed parts existing on the master can be increased by further adding the second recessed part to the first recessed part on the master side. Thereby, the density of the structure 11a formed on a base material can be raised. Thus, by improving the density of the structure 11a, a flat part reduces in the uneven surface of the anti-glare film 1, As a result, anti-glare property can be improved.

<3. Third Embodiment>
FIG. 10A is a cross-sectional view illustrating a first example of a configuration of a base material provided in an antiglare film according to a third embodiment of the present invention. As shown to FIG. 10A, the base material 11 differs from 1st Embodiment in the point provided with the some microstructure 11c on the uneven surface in which the hard-coat layer 12 is formed. The fine structure 11c is formed on at least a part of the surface of the fine structure 11c, for example. From the viewpoint of reducing glare, it is preferable to form the fine structure 11 c on the entire surface of the structure 11. The fine structure 11c is a protrusion or recess that is smaller than the structure 11c. Whether or not the fine structure 11c is formed on the uneven surface of the substrate 11 can be confirmed as follows, for example. That is, by dissolving the base material 11 such as a TAC film with a solvent, exposing the interface between the hard coat layer 12 and the base material 11, and observing this interface using a microscope, whether or not the microstructure 11 is formed Can be confirmed.

  It is preferable that the base material 11 and the hard coat layer 12 have different refractive indexes. The difference in refractive index between the substrate 11 and the hard coat layer 12 is preferably 0.01 or more and 0.2 or less. If it is less than 0.01, it tends to be difficult to obtain an internal haze that suppresses glare. On the other hand, if it exceeds 0.2, the reflectance at the interface increases, and the light utilization efficiency tends to decrease.

  The ten-point average roughness (Rzjis) of the uneven surface of the hard coat layer 12 is preferably in the range of 0.1 μm or more and 0.7 μm or less. This is because glare that is felt when observed from the front can be suppressed. Thus, when the ten-point average roughness (Rzjis) of the hard coat layer 12 is in the range of 0.1 μm or more and 0.7 μm or less, it is preferable to form a large number of microstructures 11b on the substrate surface. . This is because glare that can be felt when the anti-glare film 1 is observed from an oblique direction can be suppressed, and glare cannot be felt when observed from any angle.

  Examples of the shape of the fine structure 11c include a dot shape and a line shape, and these shapes may be used in combination. Examples of the linear shape include a linear shape, a curved shape, an annular shape, and combinations thereof, and it is preferable to appropriately select from these shapes according to desired characteristics. The height and width of the fine structure 11c are, for example, smaller than that of the structure 11a. The fine structure 11c is formed on the concavo-convex surface of the substrate 11 with a shorter cycle than the structure 11a. The fine structure 11c can be formed, for example, by adding a surfactant to an etching solution used in the etching process.

  The fine structure 11c can be formed, for example, by etching the surface of the master using an etchant to which a surfactant is added. As the surfactant, for example, a known alkyl sulfonate, alkylaryl sulfonate, perfluoroalkyl sulfonate, or the like can be used.

  It is preferable that the fine structure 11b has a size that does not substantially contribute to the formation of the uneven shape on the surface of the hard coat layer. Here, “substantially not contributing” means that the diffuse reflection characteristic of the hard coat layer surface is substantially equal to the case where the fine structure 11b is not present. Specifically, it means that the displacement of the surface haze due to the formation of the fine structure 11b is within 2%.

  FIG. 11A is a schematic diagram illustrating a first example of the shape of a microstructure. As shown in FIG. 11A, a plurality of fine structures 11c protruding in a dot shape are formed on the surface of the structure 11a. The arrangement of the plurality of fine structures 11c is not particularly limited, and either a regular arrangement or a random arrangement may be employed depending on desired characteristics.

  FIG. 11B is a schematic diagram illustrating a second example of the shape of the fine structure. As shown in FIG. 11B, a plurality of fine structures 11c protruding in a straight line extend from the top to the bottom of the structure 11a.

  FIG. 11C is a schematic diagram illustrating a third example of the shape of the microstructure. As shown in FIG. 11C, a plurality of fine structures 11c protruding in an annular shape are formed from the top to the bottom of the structure 11a. That is, a bellows-like ridge is formed on the surface of the structure 11a.

  In the third embodiment of the present invention, since a plurality of fine structures 11c are formed on the uneven surface on which the hard coat layer 12 is formed, internal haze (for example, 1 to 5%) can be imparted. . When the anti-glare film 1 provided with such a base material 11 is applied to the surface of a display device, glare can be reduced. Note that, by appropriately adjusting the size, shape, and the like of the fine structure 11c, it is possible to obtain substantially the same uneven shape (that is, diffuse reflection characteristics) as in the case where the fine structure 11c is not formed.

  FIG. 10B is a cross-sectional view showing a second example of the configuration of the base material provided in the antiglare film according to the third embodiment of the present invention. As shown in FIG. 10B, the second example is different from the first example in that a gap 11d is formed between adjacent structures 11a. When the gap 11d is thus formed, the fine structure 11c may be formed on at least one of the surface of the structure 11a and the gap 11d between the structures 11a. From the viewpoint of reducing glare, it is preferable to form the fine structures 11c on both the surface of the structures 11a and the gaps 11d between the structures 11a.

  According to the anti-glare film 1 according to the third embodiment, since a large number of fine structures 11b are formed on the uneven surface of the substrate 11 on which the hard coat layer 12 is formed, internal haze (for example, 1 to 1) 5%). When the anti-glare film 1 provided with such a base material 11 is applied to the surface of a display device, glare can be reduced. In addition, by appropriately adjusting the size, shape, and the like of the fine structure 11b, it is possible to obtain a concavo-convex shape (that is, diffuse reflection characteristics) on the surface of the hard coat layer that is almost the same as when the fine structure 11b is not formed. .

<4. Fourth Embodiment>
FIG. 12: is sectional drawing which shows one structural example of the anti-glare film which concerns on the 4th Embodiment of this invention. In the fourth embodiment, the structure 11a includes one or more steps St on the side surface, and the structure 11a has a step structure including two or three or more step structures. This is different from the first embodiment. Two or three or more step structures are configured to become smaller from the substrate side toward the surface side of the hard coat layer. FIG. 4 shows an example in which the structure 11a has one step on the side surface, and the step structure includes a first step structure 16b and a second step structure 16a. The structure 11a preferably has a dome shape as a whole. The shape of the bottom surface of the step structure forming each step is not limited to the same shape, and may be a different shape.

<5. Fifth Embodiment>
[Configuration of liquid crystal display device]
FIG. 13 is a cross-sectional view showing one configuration of the liquid crystal display device according to the fifth embodiment of the present invention. As shown in FIG. 13, the liquid crystal display device includes a backlight 3 that emits light, and a liquid crystal panel 2 that displays an image by temporally and spatially modulating the light emitted from the backlight 3. Polarizers 2a and 2b are provided on both surfaces of the liquid crystal panel 2, respectively. An anti-glare film 1 that is an anti-glare film is provided on the polarizer 2 b on the display surface side of the liquid crystal panel 2.
Hereinafter, the backlight 3, the liquid crystal panel 2, and the antiglare film 1 constituting the liquid crystal display device will be sequentially described.

(Backlight)
As the backlight 3, for example, a direct type backlight, an edge type backlight, and a planar light source type backlight can be used. The backlight 3 includes, for example, a light source, a reflecting plate, an antiglare film, and the like. Examples of the light source include a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), organic electroluminescence (OEL), and inorganic electroluminescence (IEL). ) And a light emitting diode (LED).

(LCD panel)
Examples of the liquid crystal panel 2 include a twisted nematic (TN) mode, a super twisted nematic (STN) mode, a vertically aligned (VA) mode, and a horizontal alignment (In-Plane Switching: IPS). Mode, Optically Compensated Birefringence (OCB) mode, Ferroelectric Liquid Crystal (FLC) mode, Polymer Dispersed Liquid Crystal (PDLC) mode, Phase Transition Guest Host (Phase) A display mode such as Change Guest Host (PCGH) mode can be used.

  For example, polarizers 2a and 2b are provided on both surfaces of the liquid crystal panel 2 so that their transmission axes are orthogonal to each other. The polarizers 2a and 2b allow only one of the orthogonal polarization components of incident light to pass through and block the other by absorption. As the polarizers 2a and 2b, for example, a polyvinyl alcohol (PVA) film with an iodine complex or a dichroic dye arranged in a uniaxial direction can be used. It is preferable to provide protective layers, such as a triacetyl cellulose (TAC) film, on both surfaces of the polarizers 2a and 2b. Thus, when providing a protective layer, it is preferable to set it as the structure which this protective layer serves as the base material of the anti-glare film 1 as well. This is because the polarizers 2a and 2b can be thinned by using such a configuration.

(Anti-glare film)
As the anti-glare film 1, one of the anti-glare films according to the first to fourth embodiments described above can be used.

  According to the fifth embodiment, since the antiglare film 1 is provided on the display surface of the liquid crystal display device, the antiglare property, scratch resistance, antistatic property and the like on the display surface of the liquid crystal panel 2 are improved. be able to.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited only to these Examples.

In this example, the film thickness (average film thickness) of the hard coat layer was determined as follows using a thickness measuring device (TESA Corporation, electric micrometer).
First, a 6 mmφ cylindrical contact terminal is used, and the hard coating layer is brought into contact with the hard coating layer with a low load that does not crush the hard coating layer, and the thickness of the antiglare film is measured at five arbitrary points. did. Then, simply adding the average thickness of the measured antiglare film, an average value was obtained D _A total thickness antiglare film. Next, the thickness of the uncoated part of the same anti-glare film was measured at arbitrary 5 points. Then, simply adding the average thickness of the measured substrate (TAC film), to obtain an average thickness D _B of the base material. Next, it subtracted the mean thickness D _B of the base material from the average value D _A total thickness antiglare film was the value and the film thickness of the hard coat layer.

Example 1
First, irregularities were formed on the surface of a triacetyl cellulose film (hereinafter referred to as a TAC film) (made by Fuji Film Co., Ltd., film thickness: 80 μm) by shape transfer (embossing) from a master produced by etching. Next, this uneven surface was evaluated with a stylus type surface roughness measuring instrument (Surfcoder ET4000 manufactured by Kosaka Laboratory Ltd.). As a result, Ra (arithmetic average roughness) = 0.903 μm, Rz (ten-point average roughness) = 2.907 μm, and RSm (average length of roughness curve elements) = 65 μm.

Next, an ultraviolet curable resin composition having the following composition was coated on the uneven surface of the TAC film with a coil bar. After coating, the ultraviolet curable resin composition was dried at 80 ° C. for 1 minute 30 seconds. In the process of solvent evaporation of the ultraviolet curable resin composition, the ultraviolet curable resin composition gelled, and moderate smoothness was formed following the uneven shape of the TAC film. Next, an antiglare film having an antistatic hard coat layer having a thickness of 9 μm was obtained by irradiating with 350 mJ / cm ² of ultraviolet light in a nitrogen atmosphere. Next, the surface shape of the hard coat layer was evaluated with a stylus type surface roughness measuring instrument (Surfcoder ET4000 manufactured by Kosaka Laboratory Ltd.). As a result, Ra = 0.116 μm, Rz = 0.526 μm, and RSm = 91 μm.

(Combination)
-Urethane acrylic oligomer 25.97 parts by mass (trade name: CN9006 manufactured by Sartomer)
-Polyfunctional acrylic monomer 12.98 mass parts (Brand name: A-TMM-3 Shin-Nakamura Chemical Co., Ltd. product)
-Silica filler with a particle size of 25 nm (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass (trade name: Irgacure 184 Ciba Specialty Chemicals)
・ Fluorine-containing oligomer (bifunctional acrylic) 1 part by mass (trade name: RS-751K manufactured by DIC)
・ 0.05 parts by mass of fluorine-containing acrylic polymer (trade name: KL-600 manufactured by Kyoeisha Chemical Co., Ltd.)
-15 parts by mass of ionic liquid (trade name: CIL-641 (1-butyl-3-methylimidazolium tetrafluoroborate) manufactured by Nippon Carlit)
・ Viscosity modifier 0.0375 parts by mass (trade name: G-700, manufactured by Kyoeisha Chemical Co., Ltd.)
・ Solvent Isopropyl alcohol (IPA) 100.4625 parts by mass 1.3-dioxolane 45 parts by mass Butyl cellosolve 4.5 parts by mass

The structure of an ionic liquid (trade name: CIL-641 (1-butyl-3-methylimidazolium tetrafluoroborate) manufactured by Nippon Carlit Co., Ltd.) is shown in the following chemical formula (1).

(Example 2)
Antiglare property having an antistatic hard coat layer with a film thickness of 9 μm in the same manner as in Example 1 except that the blending amount of the viscosity modifier is doubled and an ultraviolet curable resin composition having the following blending is prepared. A film was obtained. Next, as in Example 1, the surface shape of the hard coat layer was evaluated. As a result, Ra = 0.221 μm, Rz = 0.962 μm, and RSm = 88 μm.

(Combination)
-Urethane acrylic oligomer 25.97 parts by mass-Polyfunctional acrylic monomer 12.98 parts by mass-Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 15 parts by mass, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4 .5 parts by mass In addition, since the company name and the trade name of the source of the material are the same as those in Example 1, their description is omitted.

(Example 3)
An antiglare film having an antistatic hard coat layer having a thickness of 9 μm was obtained in the same manner as in Example 1 except that an ultraviolet curable resin composition having the following composition was prepared without adding a viscosity modifier. Next, as in Example 1, the surface shape of the hard coat layer was evaluated. As a result, Ra = 0.109 μm, Rz = 0.383 μm, and RSm = 87 μm.

(Combination)
-Urethane acrylic oligomer 25.97 parts by mass-Polyfunctional acrylic monomer 12.98 parts by mass-Silica filler with 25 nm particle diameter (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 0 .1 part by mass, fluorine-containing acrylic polymer 0.05 part by mass, ionic liquid 15 parts by mass, solvent isopropyl alcohol (IPA) 100.5 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4.5 parts by mass Since the company name and the trade name of the material source are the same as those in Example 1, their description is omitted.

Example 4
An anti-glare film having an antistatic hard coat layer with a thickness of 9 μm in the same manner as in Example 1 except that the amount of silica filler is reduced to 20 parts by mass and an ultraviolet curable resin composition having the following composition is prepared. Got. Next, as a result of evaluating the surface shape of the hard coat layer in the same manner as in Example 1, Ra = 0.087 μm, Rz = 0.333 μm, and RSm = 96 μm.

(Combination)
Urethane acrylic oligomer 39.3 parts by mass Polyfunctional acrylic monomer 19.65 parts by mass Silica filler with 25 nm particle diameter (acrylic modification) 20 parts by mass Polymerization initiator 5 parts by mass Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 15 parts by mass, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4 .5 parts by mass In addition, since the company name and the trade name of the source of the material are the same as those in Example 1, their description is omitted.

(Example 5)
An antiglare film was obtained in the same manner as in Example 2 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 7 μm.

(Example 6)
An antiglare film was obtained in the same manner as in Example 2 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 11 μm.

(Example 7)
An antiglare film was obtained in the same manner as in Example 1 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 7 μm.

(Example 8)
An antiglare film was obtained in the same manner as in Example 1 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 15 μm.

Example 9
An antiglare film was obtained in the same manner as in Example 3 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 6 μm.

(Example 10)
An antiglare film was obtained in the same manner as in Example 3 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 14 μm.

(Example 11)
An antiglare film was obtained in the same manner as in Example 4 except that the coating thickness of the ultraviolet curable resin composition was adjusted and the thickness of the hard coat layer after curing was 10 μm.

(Example 12)
Antiglare property having an antistatic hard coat layer with a film thickness of 9 μm in the same manner as in Example 1 except that the blending amount of the ionic liquid is reduced to 10 parts by weight and an ultraviolet curable resin composition having the following blending is prepared. A film was obtained.

(Combination)
-Urethane acrylic oligomer 29.3 parts by mass-Polyfunctional acrylic monomer 14.65 parts by mass-Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 15 parts by mass, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4 .5 parts by mass In addition, since the company name and the trade name of the source of the material are the same as those in Example 1, their description is omitted.

(Example 13)
Antiglare property having an antistatic hard coat layer with a film thickness of 9 μm in the same manner as in Example 1 except that the blending amount of the ionic liquid is increased to 25 parts by weight and an ultraviolet curable resin composition having the following blending is prepared. A film was obtained.

(Combination)
Urethane acrylic oligomer 19.3 parts by mass Polyfunctional acrylic monomer 9.62 parts by mass Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass Polymerization initiator 5 parts by mass Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 25 parts by mass, viscosity modifier 0.0075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4 .5 parts by mass In addition, since the company name and the trade name of the source of the material are the same as those in Example 1, their description is omitted.

(Example 14)
An antiglare film was obtained in the same manner as in Example 3 except that azaspiro [4.4] nonanetetrafluoroborate (trade name: CIL-131, manufactured by Nippon Carlit Co., Ltd.) was used as the ionic liquid.

The structure of an ionic liquid (trade name: CIL-131, manufactured by Nippon Carlit) is shown in the following chemical formula (2).

(Example 15)
An antistatic hard coat layer having a film thickness of 9 μm was prepared in the same manner as in Example 1 except that an aliphatic amine-based ionic liquid was used as the ionic liquid and an ultraviolet curable resin composition having the following composition was prepared. A dazzling film was obtained.

(Combination)
Urethane acrylic oligomer 39.3 parts by mass Polyfunctional acrylic monomer 19.65 parts by mass Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass Polymerization initiator 5 parts by mass Fluorine-containing oligomer (bifunctional acrylic) 1 Part by mass, fluorine-containing acrylic polymer 0.05 part by mass, ionic liquid 15 parts by mass (trade name: IL-A5 manufactured by TA Chemical Co., Ltd.)
Viscosity modifier 0.075 parts by mass Solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass Butyl cellosolve 4.5 parts by mass The company name of the above-mentioned material other than the ionic liquid, Since the product names are the same as those in Example 1, their descriptions are omitted.

The structure of an ionic liquid (trade name: IL-A5 manufactured by TA Chemical Co., Ltd.) is shown in the following chemical formula (3).

(Example 16)
An antiglare film was obtained in the same manner as in Example 3 except that 1-butylhexafluorophosphate was used as the ionic liquid.

The structure of “1-butylhexafluorophosphate” which is an ionic liquid is shown in the following chemical formula (4).

(Comparative Example 1)
An antiglare film having an antistatic hard coat layer with a thickness of 9 μm was obtained in the same manner as in Example 1 except that an ultraviolet curable resin composition having the following composition was prepared without blending an ionic liquid. .

(Combination)
-Urethane acrylic oligomer 35.97 parts by mass-Polyfunctional acrylic monomer 17.98 parts by mass-Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass
Butyl cellosolve 4.5 parts by mass In addition, since the company name of the acquisition source of the said material and a brand name are the same as that of Example 1, those description is abbreviate | omitted.

(Comparative Example 2)
An antiglare film having an antistatic hard coat layer having a film thickness of 9 μm was obtained in the same manner as in Example 1 except that an ultraviolet curable resin composition having the following composition was prepared without using a silica filler. Next, as in Example 1, the surface shape of the hard coat layer was evaluated. As a result, Ra = 0.027 μm, Rz = 0.111 μm, and RSm = 101 μm.

(Combination)
-Urethane acrylic oligomer 52.63 parts by mass-Multifunctional acrylic monomer 26.32 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 part by mass-Fluorine-containing acrylic polymer 0.05 part by mass-Ion 15 parts by mass of liquid, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4.5 parts by mass Since the product names are the same as those in Example 1, their descriptions are omitted.

(Comparative Example 3)
Antiglare property having an antistatic hard coat layer with a film thickness of 9 μm in the same manner as in Example 1 except that the blending amount of the ionic liquid is reduced to 5 parts by mass and an ultraviolet curable resin composition having the following blending is prepared. A film was obtained.

(Combination)
-Urethane acrylic oligomer 32.63 parts by mass-Multifunctional acrylic monomer 16.32 parts by mass-Silica filler with 25 nm particle size (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 5 parts by mass, viscosity modifier 0.075 parts by mass, solvent isopropyl alcohol (IPA) 100.425 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4 .5 parts by mass In addition, since the company name and the trade name of the source of the material are the same as those in Example 1, their description is omitted.

(Comparative Example 4)
Antiglare property having an antistatic hard coat layer with a film thickness of 9 μm in the same manner as in Example 1 except that the blending amount of the ionic liquid is increased to 30 parts by mass and an ultraviolet curable resin composition having the following blending is prepared. A film was obtained.

(Combination)
-Urethane acrylic oligomer 15.96 parts by mass-Polyfunctional acrylic monomer 7.9 parts by mass-Silica filler having a particle size of 25 nm (acrylic modification) 40 parts by mass-Polymerization initiator 5 parts by mass-Fluorine-containing oligomer (bifunctional acrylic) 1 Parts by mass, fluorine-containing acrylic polymer 0.05 parts by mass, ionic liquid 30 parts by weight, solvent isopropyl alcohol (IPA) 100.5 parts by mass 1.3-dioxolane 45 parts by mass butyl cellosolve 4.5 parts by mass Since the company name and the product name of the supplier are the same as in Example 1, their description is omitted.

(Comparative Example 5)
An antiglare film having an antistatic hard coat layer having a thickness of 9 μm was obtained in the same manner as in Comparative Example 4 except that CIL-512 (manufactured by Nippon Carlit Co., Ltd.) was used as the ionic liquid.

  The following evaluation was performed about the anti-glare film which concerns on Examples 1-16 obtained as mentioned above and Comparative Examples 1-5.

(Surface resistance)
The surface resistance of the antiglare film was evaluated with a Hiresta-UP manufactured by Mitsubishi Chemical Corporation (probe: URS, applied voltage: 1000 V).

(Martens hardness)
It was evaluated with PICODERTOR HM500 (manufactured by Fisher Instruments Co., Ltd.), and the weight was 5 mN.

(Pencil hardness)
Based on JIS K5400, the weight was evaluated at 500 g.

(HAZE, total light transmittance)
The antiglare film HAZE, (JIS K7136), and total light transmittance Tt (JIS K7361) were evaluated by HM-150 (Murakami Color Research Laboratory Co., Ltd.).

(Adhesion)
The adhesion of the antistatic hard coat layer was evaluated by a peel test of JIS K5400 grid (1 mm interval × 100 mass) cellophane tape CT24 (manufactured by Nichiban Co., Ltd.).

(Steel wool test)
In AB-301 (manufactured by Tester Sangyo Co., Ltd.), steel wool (Nippon Steel Wool Co., Ltd. Bonstar # 0000) was reciprocated 10 times on the surface of the antistatic hard coat layer while applying a load of 250 g, and then visually checked for scratches. It was confirmed.

(Anti-glare)
An antiglare film was attached to a blackboard via an adhesive sheet, and reflection of a fluorescent lamp was confirmed. Evaluation was made according to the following criteria.
○: Antiglare property was developed and the outline of the fluorescent lamp was blurred.
X: Anti-glare property was not exhibited, and the outline of the fluorescent lamp was clearly reflected.

(Surface irregular shape)
The surface shape of the concavo-convex surface of the base material before the formation of the hard coat layer and the concavo-convex surface of the hard coat layer is measured with a stylus type surface roughness measuring instrument (trade name: Surfcorder ET4000, manufactured by Kosaka Laboratory Ltd.). And evaluated according to the following criteria.
(Circle): The uneven surface which followed the uneven surface of the base material is formed in the surface of a hard-coat layer.
X: The uneven surface which followed the uneven surface of the base material is not formed on the surface of the hard coat layer.

  The uneven surface of the hard coat layer that follows the uneven surface of the substrate is formed by the UV curable resin composition becoming highly viscous and following the uneven surface of the substrate during the solvent evaporation process of the UV curable resin composition. Is formed.

(Solubility)
The solubility with respect to water of the ionic liquid used for preparation of the anti-glare film which concerns on Examples 1-16 was evaluated as follows.
1 ml of pure water was added to 1 ml of ionic liquid and stirred. Then, the solution in which the solution became completely transparent with the naked eye was evaluated as soluble in water, and the cloudy white solution was evaluated as insoluble in water.

(Environmental testing)
The following environmental tests were conducted on the antiglare film and evaluated.
(60 ° C 90% Rh)
After the antiglare film was left in an environment of 60 ° C. and 90% Rh for 250 hours, the surface resistance of the antiglare film was measured with a Hiresta-UP manufactured by Mitsubishi Chemical Corporation (probe: URS, applied voltage: 1000 V). . Next, the fluctuation value of the surface resistance after the environmental test with respect to the surface resistance before the environmental test was calculated, and the calculated fluctuation value was evaluated according to the following criteria.
A: The fluctuation value of the surface resistance is one digit or less.
○: The fluctuation value of the surface resistance exceeds 1 digit and is 2 digits or less.
X: The fluctuation value of the surface resistance exceeds 2 digits.

(80 ° C DRY)
After allowing the antiglare film to stand in an environment of 80 ° C. DRY (about 10 to 20% RH) for 250 hours, the surface resistance of the antiglare film was evaluated by Hiresta-UP manufactured by Mitsubishi Chemical Corporation (probe: URS, Applied voltage: 1000 V). Next, the fluctuation value of the surface resistance after the environmental test with respect to the surface resistance before the environmental test was calculated, and the calculated fluctuation value was evaluated according to the following criteria.
A: The fluctuation value of the surface resistance is one digit or less.
○: The fluctuation value of the surface resistance exceeds 1 digit and is 2 digits or less.
X: The fluctuation value of the surface resistance exceeds 2 digits.

(FADE)
The antiglare film was tested with a light resistance tester (Ci35A, manufactured by Atlas Co., Ltd.) under an integrated light quantity condition of 90 kJ / cm2. Next, the fluctuation value of the surface resistance after the test with respect to the surface resistance before the test was calculated, and the calculated fluctuation value was evaluated according to the following criteria.
A: The fluctuation value of the surface resistance is one digit or less.
○: The fluctuation value of the surface resistance exceeds 1 digit and is 2 digits or less.
X: The fluctuation value of the surface resistance exceeds 2 digits.

(Saponification 60 ° C)
After dipping the antiglare film in a 4.5N-potassium hydroxide aqueous solution at 60 ° C. for 1 minute, the surface resistance of the antiglare film was measured with a Hiresta-UP manufactured by Mitsubishi Chemical Corporation (probe: URS, applied voltage: 1000V). Next, the fluctuation value of the surface resistance after saponification relative to the surface resistance before saponification was calculated, and the calculated fluctuation value was evaluated according to the following criteria.
A: The fluctuation value of the surface resistance is one digit or less.
○: The fluctuation value of the surface resistance exceeds 1 digit and is 2 digits or less.
X: The fluctuation value of the surface resistance exceeds 2 digits.

In Table 1, the structure of the anti-glare film which concerns on Examples 1-16 and Comparative Examples 1-5 is shown.

In Table 2, the evaluation result of the anti-glare film which concerns on Examples 1-16 and Comparative Examples 1-5 is shown.

但し、表３中、表面抵抗の評価結果欄における括弧内の数値は、環境試験後の表面抵抗を示す。 In Table 3, the evaluation result of the anti-glare film which concerns on Examples 1-16 and Comparative Examples 1-5 is shown.

However, in Table 3, the numerical value in parentheses in the surface resistance evaluation result column indicates the surface resistance after the environmental test.

From the evaluation results shown in Table 2, the following were found.
In Example 2, it is necessary to reduce the film thickness of the hard coat layer in order to obtain the same degree of antiglare properties as in Example 1.
In Example 3, it is necessary to increase the film thickness of the hard coat layer in order to obtain the same degree of antiglare properties as in Example 1.
In Examples 1 to 16, the surface resistance is in the range of 1.0 × 10 ⁸ Ω / □ to 1.0 × 10 ¹³ Ω / □, whereas in Comparative Example 1, the surface resistance is 1 It exceeded 0.0 × 10 ¹³ Ω / □ and became 1.00 × 10 ¹⁵ Ω / □ or more. This is because in Comparative Example 1, no ionic liquid is contained in the hard coat layer.
-In Examples 1-16, although the uneven surface which followed the uneven surface of the base material was formed in the surface of a hard-coat layer, and excellent anti-glare property was expressed, in Comparative Example 2, a base material The uneven surface following the uneven surface was not formed on the surface of the hard coat layer, and no antiglare property was exhibited. In Comparative Example 2, since the ultraviolet curable resin composition does not contain a silica filler, the system does not increase in viscosity during the solvent evaporation process of the ultraviolet curable resin composition, and the uneven shape of the substrate. This is because it was buried by the ultraviolet curable resin composition.
In Comparative Example 3, the surface resistance of the antiglare film was 1.37 × 10 ¹³ Ω / □, and sufficient antistatic performance was not obtained. This is because in Comparative Example 3, the amount of the ionic liquid was small.
In Comparative Example 4, the pencil hardness of the antiglare film was F, and the Martens hardness was 231 N / mm ² , and sufficient performance as a hard coat layer was not obtained. This is because the blending amount of the ionic liquid is too large.
In Comparative Example 5, the antiglare film had a pencil hardness of F and a Martens hardness of 233 N / mm ² , and sufficient performance as a hard coat layer was not obtained. This is because the blending amount of the ionic liquid is too large.
As described above, the ultraviolet curable resin composition contains a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid. It is preferable. Moreover, it is preferable that the compounding quantity of an ionic liquid is 10 to 25 mass% with respect to the total solid of an ultraviolet curable resin composition.

From the evaluation results shown in Table 3, the following were found.
In Example 1, the surface resistance increased to 6.28 × 0 ¹² Ω / □ when left in an environment of 60 ° C. and 90% Rh for 250 hours. This is thought to be because 1-butyl-3-methylimidazolium tetrafluoroborate was dissolved in water in a high humidity environment. In Example 15, when the sample was left in an environment of 60 ° C. and 90% Rh for 250 hours, the surface resistance was Increased to 1.23 × 10 ¹² Ω / □, but from the results of the environmental test of Example 1, it was found that the value did not increase. This is presumably because IL-A5 was insoluble in water and thus difficult to dissolve in water in a high humidity environment.
From the above, from the viewpoint of improving durability in a high humidity environment, an ionic liquid insoluble in water is preferable.

  As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, Various deformation | transformation based on the technical idea of this invention is possible.

  For example, the configurations, methods, shapes, materials, numerical values, and the like given in the above-described embodiments are merely examples, and different configurations, methods, shapes, materials, numerical values, and the like may be used as necessary.

  The configurations of the above-described embodiments can be combined with each other without departing from the gist of the present invention.

  Moreover, you may make it use the anti-glare film which concerns on the above-mentioned embodiment for a display apparatus as an anti-Newton-Ring (Anti Newton-Ring: ANR) film. By using it as an ANR film in this way, it is possible to suppress the generation of Newton rings or to reduce the generation of Newton rings to the extent that it does not matter.

  Moreover, although the above-mentioned embodiment demonstrated as an example the case where the anti-glare film which concerns on this invention is applied to a liquid crystal display device, the anti-glare film which concerns on this invention is with respect to various display apparatuses other than a liquid crystal display device. Is applicable. For example, CRT (Cathode Ray Tube) display, Plasma Display Panel (PDP), Electro Luminescence (EL) display, Surface-conduction Electron-emitter Display (SED), etc. The antiglare film according to the present invention can be applied to various display devices. Moreover, it is widely applicable also as various film uses, such as a touch panel.

  In the above-described embodiment, the case where the hard coat layer is formed on the base material has been described as an example. However, the base material can be used as a diffusion sheet or a diffusion plate without forming the hard coat layer. is there. When utilizing in this way, it is good also as a structure which formed the uneven | corrugated shape of the above-mentioned embodiment with respect to both surfaces of a base material. Thereby, a spreading | diffusion effect | action can be provided to both surfaces of a base material.

  In the above-described embodiment, the base material may contain fine particles. Moreover, you may make it form uneven | corrugated shape in the back surface of a base material. Examples of the method for forming the concavo-convex shape include embossing and embossing. Further, a resin layer containing fine particles may be provided on the back surface of the base material, and the fine particles may protrude from the surface of the resin layer. Moreover, while making a base material contain microparticles | fine-particles, you may make it make some of these microparticles | fine-particles protrude from a base material back surface. Further, fine particles may be contained inside the base material, and an uneven shape may be formed on the back surface of the base material. By employ | adopting such a structure, a spreading | diffusion effect | action can be provided to the inside and / or back surface of a base material. In addition, when employ | adopting such a structure, formation of a hard-coat layer is abbreviate | omitted and it is good also as a structure which the uneven | corrugated shape of the surface of the base material was exposed. Thereby, a base material can be used as a diffusion sheet, a diffusion plate, etc.

  Moreover, although the above-mentioned embodiment demonstrated as an example the case where a several recessed part was formed in the master surface by an etching process (1st etching process), it replaced with an etching process and the several recessed part was made into the master surface by laser processing. You may make it form. In addition, after forming a plurality of recesses on the surface of the master by laser processing in this way, the entire concave / convex surface of the master may be etched as in the above-described embodiment. As a result, a plurality of recesses formed on the surface of the master can be changed from, for example, a cylindrical shape to a gentle dome shape, and a master having a smooth uneven surface can be produced.

DESCRIPTION OF SYMBOLS 1 Anti-glare film 2 Liquid crystal panel 2a, 2b Deflector 3 Backlight 11 Base material 11a Structure 12 Hard coat layer 12a Protrusion 21 Master 21a Recess 22 Resist layer 22a Exposure pattern 22b Opening 23 Master 13 Resin composition 13s Surface

Claims (12)

A substrate having an uneven surface;
A hard coat layer formed on the uneven surface of the substrate,
On the surface of the hard coat layer, an uneven shape following the uneven surface of the substrate is formed,
The hard coat layer is obtained by applying and curing an ultraviolet curable resin composition on the uneven surface of the substrate,
The ultraviolet curable resin composition contains a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid,
The anti-glare film whose compounding quantity of the said ionic liquid is 10 to 25 mass% with respect to the total solid of the said ultraviolet curable resin composition. The Martens hardness of the hard coat layer is 270 or more,
The antiglare film according to claim 1, wherein the hard coat layer has a surface resistance of 1.0 × 10 ⁸ Ω / □ or more and 1.0 × 10 ¹³ Ω / □ or less. The uneven surface of the substrate is formed by a plurality of structures,
The size of the bottom surface of the structure is not less than the minimum distance R _{m and not} more than the maximum distance R _M (however, the minimum distance R _{m is} the minimum value from the center of gravity of the bottom surface of the structure to the periphery of the bottom surface, the maximum distance R _M : Randomly within the range of the center of gravity of the bottom surface of the above structure to the peripheral edge of the bottom surface)
Among the plurality of structures, the bottom surfaces of the adjacent structures are in contact with each other or substantially in contact with each other.
The antiglare film according to claim 1, wherein the minimum distance R _m and the maximum distance R _M satisfy a relationship of R _m / R _M ≦ 0.9.   2. The uneven surface of the hard coat layer includes a plurality of protrusions having side surfaces extending from the top portion toward the bottom portion, and the bottom surfaces of adjacent protrusions of the plurality of protrusions are in contact with or substantially in contact with each other. Anti-glare film.   The antiglare film according to claim 4, wherein the shape of the bottom surface of the protrusion is at least one of a circular shape, an elliptical shape, and a polygonal shape.   The antiglare film according to claim 4, wherein the plurality of protrusions are randomly formed two-dimensionally or three-dimensionally. The ultraviolet curable resin composition further contains an organic viscosity modifier,
The anti-glare film according to claim 1, wherein the surface of the inorganic oxide filler is bonded to the organic viscosity modifier.   The antiglare film according to claim 7, wherein the bond is a hydrogen bond or a coordinate bond.   The antiglare film according to claim 1, wherein the ultraviolet curable resin composition further contains an antifouling agent.   The display apparatus provided with the anti-glare film of any one of Claims 1-9. Applying an ultraviolet curable resin composition to the uneven surface of the substrate;
A step of copying the ultraviolet curable resin composition on the uneven surface of the substrate by drying the applied ultraviolet curable resin composition;
Curing the dried UV curable resin composition,
The ultraviolet curable resin composition contains a monomer and / or oligomer having two or more (meth) acryloyl groups, a photopolymerization initiator, an inorganic oxide filler, and an ionic liquid,
The manufacturing method of the anti-glare film whose compounding quantity of the said ionic liquid is 10 to 25 mass% with respect to the total solid of the said ultraviolet curable resin composition. Monomers and / or oligomers having two or more (meth) acryloyl groups;
A photopolymerization initiator;
An inorganic oxide filler;
An ionic liquid and
The ultraviolet curable resin composition whose compounding quantity of the said ionic liquid is 10 to 25 mass% with respect to the total solid.

Images