TW202132093A - Anti-glare film and film with anti-glare and low reflectivity - Google Patents

Abstract

Provided is an antiglare film in which a reflection reducing layer that is less likely to reduce light reflection performance can be formed. This antiglare film 1 comprises, on at least one surface of a transparent base material layer 2, an antiglare layer 3 which contains a binder resin (A), and organic fine particles (B) and inorganic fine particles (C) dispersed in the binder resin (A). The absolute value of the difference in refractive index between the binder resin (A) and the organic fine particles (B) is 0.005-0.25. The average primary particle diameter of the inorganic fine particles (C) is smaller than the average primary particle diameter of the organic fine particles (B). The arithmetic average roughness (Ra) of the surface of the antiglare layer 3 is in the range of 0.080-0.210 [mu]m. The average interval (Sm) of the irregularities on the surface of the antiglare layer 3 is 0.100-0.200 [mu]m.

Description

Anti-glare film and film with anti-glare property and low reflectivity

The present disclosure relates to anti-glare films and films with anti-glare properties and low reflectivity. In more detail, it relates to the following anti-glare film, which has a transparent substrate layer and an anti-glare layer on at least one surface of the transparent substrate layer, the anti-glare layer is a binder resin dispersed with organic and inorganic particles者; And, the present disclosure relates to the use of the anti-glare film with anti-glare and low reflectivity film.

Patent Document 1 (Japanese Patent No. 5974894) describes an anti-glare film. The anti-glare film has an anti-glare layer with a concave-convex shape on the surface of at least one surface of a light-transmitting substrate. The aforementioned anti-glare layer contains agglomerates formed by agglomeration of two or more kinds of spherical fine particles. The agglomerates form convex portions on the surface of the anti-glare layer, thereby forming the concave-convex shape on the surface of the anti-glare layer. In addition, the aforementioned two or more kinds of spherical fine particles include at least one or more kinds of organic fine particles and one or more kinds of inorganic fine particles. The average particle size of the aforementioned organic fine particles is 0.3 to 10.0 µm, and the average particle size of the aforementioned inorganic fine particles is 500 nm to 5.0 µm.

In the anti-glare film described in Patent Document 1, when a functional layer such as a reflection reduction layer is to be formed on the surface of the uneven shape of the anti-glare layer, the effect of the uneven shape on the surface of the anti-glare layer makes it difficult for the functional layer to function. The situation of its function.

For example, when the function layer is a reflection reduction layer, if the reflection reduction layer is formed on the surface of the anti-glare layer, the thickness of the function layer is likely to become uneven, and the ability of the reflection reduction layer to suppress light reflection may decrease.

The purpose of the present disclosure is to provide an anti-glare film and a film with anti-glare properties and low reflectivity. The anti-glare film is easy to form a reflection reduction layer whose ability to suppress light reflection is not easily reduced.

An anti-glare film of one aspect of the present disclosure includes a transparent substrate layer and an anti-glare layer on at least one surface of the transparent substrate layer. The anti-glare layer contains a binder resin (A) dispersed in the binder resin (A). ) In the organic particles (B) and inorganic particles (C). The absolute value of the difference in refractive index between the binder resin (A) and the organic fine particles (B) is 0.005 or more and 0.25 or less. The average primary particle size of the inorganic fine particles (C) is smaller than the average primary particle size of the organic fine particles (B). The arithmetic average roughness (Ra) of the aforementioned anti-glare layer surface is in the range of 0.080 μm or more and 0.210 μm or less, and the average interval (Sm) of the unevenness on the surface of the anti-glare layer is 0.100 μm or more and 0.200 μm or less.

One aspect of the present disclosure has anti-glare and low-reflection films. The anti-glare layer in the anti-glare film is sequentially provided with a high refractive index layer, an ultra-high refractive index layer and a low refractive index layer. The refractive index of the high refractive index layer is 1.60 or more and 1.70 or less. The refractive index of the ultra-high refractive index layer is 1.75 or more and 1.90 or less. The refractive index of the low refractive index layer is 1.30 or more and 1.40 or less.

(1) Summary The anti-glare film 1 of this embodiment includes a transparent base layer 2 and an anti-glare layer 3 on at least one surface of the transparent base layer 2. The anti-glare layer 3 contains a binder resin (A) dispersed in the binder resin ( A) Organic fine particles (B) and inorganic fine particles (C) (refer to Figure 1). The absolute value of the difference in refractive index between the binder resin (A) and the aforementioned organic fine particles (B) is 0.005 or more and 0.25 or less. The average primary particle size of the inorganic fine particles (C) is smaller than the average primary particle size of the organic fine particles (B). The arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 is in the range of 0.080 μm or more and 0.210 μm or less, and the average interval (Sm) of the unevenness on the surface of the anti-glare layer 3 is 0.100 μm or more and 0.200 μm or less.

The anti-glare film 1 has an anti-glare layer 3 in which organic particles (B) and inorganic particles (C) are dispersed in a binder resin (A). Therefore, the organic particles (B) in the binder resin (A) tend to become convex. And the part of the binder resin (A) where there are no organic particles (B) tends to become concave, and the surface of the anti-glare layer 3 can be formed into a concave-convex shape by the organic particles (B) and the inorganic particles (C). In addition, the absolute value of the difference between the refractive index of the binder resin (A) and the aforementioned organic fine particles (B) is 0.005 or more and 0.25 or less. Therefore, due to the interaction with the unevenness on the surface of the anti-glare layer 3, the anti-glare layer 3 It is anti-glare. The so-called "anti-glare property" is the property of suppressing the decrease in visibility caused by the reflection of external light by diffuse reflection of incident light on the surface with unevenness. Therefore, by disposing the anti-glare film 1 on the surface of the display, etc., the reflection of fluorescent lamps or external light can be reduced, and the visibility can be improved.

In addition, the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 of the anti-glare film 1 is in the range of 0.080 µm or more and 0.210 µm or less, and the average interval (Sm) of the asperities on the surface of the anti-glare layer 3 is 0.100 µm or more and 0.200 µm or less, so the functional layer formed on the surface of the anti-glare layer 3 is easily formed with the same thickness as the concave and convex portions on the surface of the anti-glare layer 3. Therefore, when the functional layer is a reflection reduction layer, the thickness of the reflection reduction layer will be uniformly formed, so the function of the reflection reduction layer is not easily damaged, that is, the function of suppressing the reflection of incident light is not easily damaged.

Moreover, since the average primary particle size of the inorganic fine particles (C) is smaller than the average primary particle size of the organic fine particles (B), the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 and the average interval of the unevenness on the surface of the anti-glare layer 3 (Sm) is easily formed into a desired range.

In the anti-glare film 1, the hydroxyl group concentration of the aforementioned binder resin (A) is preferably greater than 0 mmol/g and less than 2.50 mmol/g. At this time, it is easy to control the agglomeration state of the organic fine particles (B) and the inorganic fine particles (C), and it is easy to control the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 and the average interval (Sm) of concavities and convexities.

In the anti-glare film 1, the aforementioned binder resin (A) preferably contains a hydroxyl-containing acrylate. In this case, it is easy to adjust the hydroxyl group concentration of the aforementioned binder resin (A).

In the anti-glare film 1, the average primary particle size of the aforementioned organic fine particles (B) is preferably 2 µm or more and 7 µm or less. At this time, it is easy to form a moderate concave-convex shape on the surface of the anti-glare layer, so that the anti-glare performance of the anti-glare film is not likely to be insufficient.

In the anti-glare film 1, the average primary particle diameter of the aforementioned inorganic fine particles (C) is preferably 1 nm or more and 200 nm or less. At this time, it is easy to form agglomerates of the organic fine particles (B) in the anti-glare layer, and the inorganic fine particles (C) easily enter between the organic fine particles (B) and the transparent base layer 2, so that the anti-glare film 1 is easy to obtain an anti-glare film. sex.

In the anti-glare film 1, the aforementioned inorganic fine particles (C) preferably contain fumed silica. At this time, the affinity of the inorganic fine particles (C) to the organic fine particles (B) can be made high, so that the inorganic fine particles (C) can easily enter between the organic fine particles (B) and the transparent substrate layer 2.

The anti-glare and low-reflectivity film 10 is provided in order on the anti-glare layer in the anti-glare film: a high refractive index layer with a refractive index of 1.60 or more and 1.70 or less, and a refractive index of 1.75 or more and 1.90 or less The ultra-high refractive index layer and the low refractive index layer with a refractive index above 1.30 and below 1.40. At this time, the film 10 can easily obtain anti-glare properties and low reflectivity. (2) Details (Anti-glare film)

The anti-glare film 1 has an anti-glare layer 3 in which organic fine particles (B) and inorganic fine particles (C) are dispersed in a binder resin (A) on at least one surface of a transparent substrate layer 2 (refer to FIG. 1). The anti-glare layer 3 may be formed only on one of the two opposite surfaces of the transparent base layer 2 in the thickness direction, or may be formed on both surfaces. The anti-glare layer 3 is formed by containing organic fine particles (B) and inorganic fine particles (C) in a binder resin (A). (Anti-glare and low-reflection film)

Anti-glare and low-reflective film (hereinafter sometimes referred to as "anti-glare low-reflection film") 10 on the anti-glare layer 3 of the anti-glare film 1 is sequentially provided with a high refractive index layer 41, a super The high refractive index layer 42 and the low refractive index layer 43. (Transparent substrate layer)

The transparent substrate layer 2 is a thin film that is transparent and supports the anti-glare layer 3 and the reflection reduction layer 4. Here, the term "transparent" includes translucent, and its light transmittance is 80% or more and 100% or less, preferably 85% or more and 100% or less, and more preferably 90% or more and 100% or less. If the light transmittance of the transparent substrate layer 2 is above 90%, it has the advantage of being suitable for use as an optical film.

The transparent substrate layer 2 may be formed of a material containing synthetic resin. The synthetic resin is preferably polyester (PET), triacetate cellulose (TAC), etc., so that the transparent substrate layer 2 has excellent mechanical strength and good optical properties. In addition to PET and TAC, synthetic resins can also include cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyether stubble, poly stubble, polypropylene, polymethylpentene, and polychloride. Thermoplastic resins such as ethylene, polyvinyl acetal, polyether ketone, polymethyl methacrylate, polycarbonate, or polyurethane.

Among polyester films, biaxially stretched films of polyethylene terephthalate (PET) or polyethylene naphthalate are particularly suitable because of their excellent mechanical properties, heat resistance, chemical resistance, etc. Materials such as magnetic tapes, ferromagnetic film tapes, packaging films, electronic parts films, electrical insulating films, laminating films, films attached to the surface of displays, and films used to protect various components. Particularly, in display applications, it is suitable as a base film for a thin slice, touch panel, backlight, etc., which is a component of a liquid crystal display device, or a base film for anti-glare film 1 and anti-glare low-reflection film 10 for televisions, and electric Anti-glare film 1 and anti-glare reflection film 10, near infrared cut-off film, base film of electromagnetic wave shielding film, etc. used in the front filter of a slurry TV.

The polyester is preferably aromatic dicarboxylic acid components such as terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-diphthalic acid, and ethylene glycol, 1,4-butanediol , 1,4-cyclohexanedimethanol, 1,6-hexanediol and other diol components produced by the reaction of aromatic polyesters, especially polyethylene terephthalate, polyethylene-2,6 -Naphthalate, etc. In addition, the polyester may be a copolyester of a plurality of components and the like exemplified above.

The transparent substrate layer 2 may also contain organic or inorganic particles. At this time, the winding properties, conveying properties, etc. of the transparent base material layer 2 are improved. The particles can include calcium carbonate particles, calcium oxide particles, alumina particles, kaolin, silica particles, zinc oxide particles, crosslinked acrylic resin particles, crosslinked polystyrene resin particles, urea resin particles, melamine resin particles, crosslinked Polysilicone resin particles, etc. The transparent base layer 2 may also contain colorants, antistatic agents, ultraviolet absorbers, antioxidants, lubricants, catalysts, other resins, etc., within a range that does not impair transparency.

The haze of the transparent substrate layer 2 is preferably 3% or less. In this case, the visibility of the image through the anti-glare film 1 and the anti-glare low-reflection film 10 will be improved, and the anti-glare film 1 and the anti-glare low-reflection film 10 It will become particularly suitable as a film for optical applications. It is better if the haze is below 1.5%.

The thickness of the transparent substrate layer 2 is not particularly limited, but is preferably in the range of 20 μm or more and 200 μm or less. Especially when the thickness of the transparent substrate layer 2 is 25 µm or more and 100 µm or less, the anti-glare film 1 and the anti-glare low-reflection film 10 can be thinner and lighter, and are used in both the anti-glare film 1 and the anti-glare low-reflection film 10 The occurrence of interference on the surface (front and back) is suppressed, and the heat shrinkage of the transparent base layer 2 when heated is suppressed, so that defects such as deterioration of the processability of the transparent base layer 2 due to heat shrinkage are suppressed.

The surface reflectance of the transparent substrate layer 2 is preferably in the range of 4% or more and 6% or less. If the surface reflectance of the transparent substrate layer 2 is in this range, the occurrence of interference on both surfaces (front and back) of the transparent substrate layer 2 is suppressed, and it is easy to ensure low reflectance characteristics.

In this embodiment, the surface of the transparent substrate layer 2 is preferably treated with easy adhesion treatment. The easy adhesion treatment can include dry treatment such as plasma treatment and corona treatment, chemical treatment such as alkali treatment, and coating treatment for forming an easy adhesion layer. The easy bonding process is performed to prevent the single film of the transparent base material layer 2 which is the material of the anti-glare film 1 and the anti-glare low-reflection film 10 from sticking when they are wound into a roll and overlapped, or to improve slipperiness. Among the above-mentioned easy-adhesion treatments, it is better to laminate an easy-adhesion layer on the surface (first main surface) of the transparent substrate layer 2. In this case, it is preferable that an easy-adhesion layer is interposed between the transparent base material layer 2 and the high refractive index layer 41. In addition, easy bonding treatment can also be used to improve the bonding between the transparent substrate layer 2 and the anti-glare layer 3. The material of the easy bonding layer is not limited, and it is particularly preferably formed of polyester resin, acrylic resin, etc. In order to suppress the interface reflection on the surface of the easy-adhesive layer and increase the reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10, the refractive index of the easy-adhesive layer should be close to the refractive index of the transparent substrate layer 2 and the anti-glare layer 3. The refractive index is particularly preferably in the range of 1.58~1.75. The optical film thickness of the easy bonding layer is preferably in the range of 120 to 160 nm. At this time, high adhesion between the transparent base material layer 2 and the high refractive index layer 41 can be ensured, and at the same time, the presence of the easy-to-adhesive layer leads to an increase in reflectivity or uneven interference. (Anti-glare layer)

The anti-glare layer 3 is formed by dispersing organic fine particles (B) and inorganic fine particles (C) in a binder resin (A). The organic microparticles (B) and the inorganic microparticles (C) are not uniformly dispersed in the binder resin (A), but the organic microparticles (B) and the inorganic microparticles (C) are locally dispersed appropriately. In particular, the plurality of organic fine particles (B) form secondary particles, and the surface of the anti-glare layer 3 (the surface that does not face the transparent base layer 2) is formed into an uneven shape by the secondary particles. That is, it is easy to form a convexity on the surface of the anti-glare layer 3 corresponding to a part where a plurality of secondary particles of organic fine particles (B) are present, and is easily formed corresponding to a part where a plurality of secondary particles of organic fine particles (B) are not present The surface of the anti-glare layer 3 is concave.

The arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 is in the range of 0.080 μm or more and 0.210 μm or less, and the average interval (Sm) of the unevenness on the surface of the anti-glare layer 3 is 0.100 μm or more and 0.200 μm or less. The arithmetic average roughness (Ra) and the average interval between concavities and convexities (Sm) are measured in accordance with JIS B 0601-1994. As long as the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 and the average interval (Sm) of the concavities and convexities on the surface of the anti-glare layer 3 are each within the above-mentioned predetermined range, the thickness of the reflection reduction layer can be easily formed uniformly without damage and reflection reduction. The function of layer 4 to suppress the reflection of incident light.

The arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 is preferably in the range of 0.080 µm or more and 0.200 µm or less, and more preferably in the range of 0.080 µm or more and 0.130 µm or less. When the aforementioned arithmetic average roughness (Ra) is less than 0.080 µm, when the reflection reduction layer 4 is laminated on the anti-glare layer 3, the unevenness formed on the surface of the anti-glare layer 3 is easily buried by the reflection reduction layer 4, and may not be easy to show Anti-glare property. When the aforementioned arithmetic average roughness (Ra) is greater than 0.210 µm, the surface roughness of the anti-glare layer 3 will be too large, and when the reflection-reducing layer 4 is laminated on the anti-glare layer 3, the thickness of the reflection-reducing layer 4 Prone to unevenness.

The average interval (Sm) of the unevenness on the surface of the anti-glare layer 3 is preferably 0.100 µm or more and 0.150 µm or less, and more preferably in the range of 0.100 µm or more and 0.140 µm or less. When the average interval (Sm) of the aforementioned concavities and convexities is less than 0.100 µm, the organic fine particles (B) may not be able to form agglomerates of an appropriate size in the anti-glare layer 3, and the arithmetic average thickness (Ra) may be too small. When the average interval (Sm) of the aforementioned concavities and convexities is greater than 0.200 µm, the interval between the concavities and convexities on the surface of the anti-glare layer 3 will be too large, and when the reflection reduction layer 4 is laminated on the anti-glare layer 3, the thickness of the reflection reduction layer 4 is likely to be uneven. all.

Fig. 2 schematically shows the anti-glare layer 3. The anti-glare layer 3 is formed on one surface of the transparent substrate layer 2, and a plurality of organic particles (B) and a plurality of inorganic particles (C) are dispersed in the layered binder resin (A). The average primary particle size of the inorganic fine particles (C) is smaller than the average primary particle size of the organic fine particles (B). The inorganic fine particles (C) are very small particles compared to the organic fine particles (B), so they are not clearly shown in the figure.

The surface of the anti-glare layer 3 (the surface that does not face the transparent base layer 2) is formed in an uneven shape (refer to FIG. 2). Taking the convex part of the surface of the anti-glare layer 3 as an example, a plurality of organic fine particles (B) in the binder resin (A) are aggregated to form secondary particles. In other words, the binder resin (A) swells and forms a convex due to the secondary particles of the plurality of organic fine particles (B). On the other hand, in the concave part of the surface of the anti-glare layer 3, the plurality of organic fine particles (B) in the binder resin (A) are not aggregated, or the organic fine particles (B) do not exist. That is, in the part where the plurality of organic fine particles (B) are not agglomerated or where the organic fine particles (B) are not present, the binder resin (A) is lower than the convexity and forms a concave.

In this embodiment, the unevenness on the surface of the anti-glare layer 3 is relatively gentle. That is, the height difference between the concave and convex on the surface of the anti-glare layer 3 is small. Therefore, when the reflection reduction layer 4 is formed (laminated) on the anti-glare layer 3 by wet coating as shown in FIGS. 3 and 4, it is easy to form a uniform reflection when the reflection reduction layer 4 is formed on the surface of the anti-glare layer 3 thickness. That is, if the surface of the anti-glare layer 3 is formed with a moderate uneven shape, the unevenness of the film thickness of the reflection reduction layer 4 formed on the surface of the anti-glare layer 3 is small, and the desired optical characteristics (low reflection, etc.) are easily exhibited. . In addition, the unevenness can be maintained, so that anti-glare properties and low reflectivity can be achieved at the same time.

On the other hand, the anti-glare layer 3 shown in Fig. 5 shows a case where the arithmetic average roughness (Ra) of the surface is greater than 0.210 µm and the average interval (Sm) of the unevenness (Sm) is less than 0.100 µm. Compared with the case of FIG. 2, in the anti-glare layer 3, the agglomerated particle diameter of the organic fine particles (B) agglomerated in the binder resin (A) is larger on average and the number is larger. In addition, there are many parts where the organic fine particles (B) are not present in the binder resin (A). Therefore, the difference in height between the concavities and convexities on the surface of the anti-glare layer 3 will be greater than that shown in FIG. 2. Therefore, when the reflection reduction layer 4 is formed (laminated) on the anti-glare layer 3 by wet coating, as shown in FIG. 6, the thickness of the reflection reduction layer 4 is not easy to become uniform. In other words, the reflection reduction layer 4 often becomes thicker in the concave portion of the anti-glare layer 3 and thinner in the convex portion, and liquid accumulates in the concave portion, resulting in uneven film thickness, so it is not easy to exhibit the desired optical characteristics (low Reflection etc.). Moreover, when the reflection reduction layer 4 is laminated on the anti-glare layer 3 by dry coating as shown in FIG. 7, although the reflection reduction layer 4 with high thickness uniformity can be formed, the anti-glare layer 4 may appear on the surface of the reflection reduction layer 4 The unevenness of the surface of layer 3 can not achieve the desired reflection performance. Here, the so-called dry coating means PVD (physical vapor deposition) method or CVD (chemical vapor deposition) method, and the so-called wet coating means coating method, spraying method, etc. The method of coating and coating.

In addition, the anti-glare layer 3 shown in FIG. 8 shows the case where the arithmetic average roughness (Ra) of the surface is less than 0.080 µm and the average interval of the unevenness (Sm) is greater than 0.200 µm. Compared with the situation in Fig. 2, in the anti-glare layer 3, the agglomerated particle size of the organic particles (B) aggregated in the binder resin (A) is smaller on average and the number is smaller. The organic particles (B) ) Almost no agglomeration, and the binder resin (A) does not contain organic fine particles (B). Therefore, the difference in height between the concavities and convexities on the surface of the anti-glare layer 3 will be smaller than that shown in FIG. 2. Therefore, as shown in FIG. 9, the thickness of the reflection reduction layer 4 can easily become uniform. However, the anti-glare performance brought about by the uneven shape of the anti-glare layer 3 will be reduced, and it is not easy to obtain an anti-glare low-reflection film 10 having excellent anti-glare properties and reflectivity.

The concavo-convex state of the anti-glare layer 3 is mainly affected by the primary particle size, agglomerated particle size and dispersion state of the organic fine particles (B). Therefore, the organic fine particles (B) should be mainly dispersed in the anti-glare layer 3 opposite to the transparent base layer 2. Inorganic particles (C) are preferably dispersed between the organic particles (B) of the anti-glare layer 3 and the transparent base layer 2 on the surface side of the side.

Moreover, since the average primary particle size of the inorganic fine particles (C) is smaller than the average primary particle size of the organic fine particles (B), the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 and the average interval of the unevenness on the surface of the anti-glare layer 3 (Sm) is easily formed into a desired range. Although the details are not clear, the inventor believes that the inorganic fine particles (C) that enter between the organic fine particles (B) and the transparent substrate layer 2 play a role in causing the organic fine particles (B) to locally exist on the surface of the transparent substrate layer 2. The inventor believes that since the inorganic particles (C) are smaller than the organic particles (B), the influence of the organic particles (B) on the surface unevenness of the anti-glare layer 3 can be finely controlled.

The anti-glare layer 3 can be formed, for example, by the following method: anti-glare containing organic fine particles (B), inorganic fine particles (C), free radiation curable resin and other uncured binder resin, photopolymerization initiator, solvent, etc. The layer composition is applied to a transparent base film and dried to form a coating film, and then the coating film is cured by irradiation with free radiation or the like.

In addition, the thickness of the anti-glare layer 3 is preferably 2 µm or more and 10 µm or less. If the thickness of the anti-glare layer 3 is less than 2 μm, the surface of the anti-glare layer 3 may be easily damaged, and if the thickness of the anti-glare layer 3 is greater than 10 μm, the anti-glare layer 3 may be easily broken. The thickness of the anti-glare layer 3 is preferably 3 μm or more and 8 μm or less, and the thickness of the anti-glare layer 3 is more preferably 3 μm or more and 6 μm or less. (Binder resin)

The binder resin (A) is preferably transparent. For example, it is preferably a free radiation curable resin that is a resin that is cured by ultraviolet rays or electron beams. The "resin" includes monomers, oligomers, and the like.

Examples of the above-mentioned free radiation curable resin include compounds having 1 or 2 or more unsaturated bonds, such as compounds having functional groups such as acrylates. Examples of the compound having one unsaturated bond include ethyl (meth)acrylate, ethylhexyl (meth)acrylate, styrene, methylstyrene, N-vinylpyrrolidone, and the like. The compound having two or more unsaturated bonds may include, for example, polyhydroxymethyl propane tri(meth)acrylate, hexanediol (meth)acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, Meth) acrylate, neopentyl erythritol tri (meth) acrylate, dineopentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol Multifunctional compounds such as di(meth)acrylates, or reaction products of the above-mentioned multifunctional compounds and (meth)acrylates, etc. (for example, poly(meth)acrylates of polyols), etc. In addition, "(meth)acrylate" means methacrylate and acrylate. Furthermore, in the present invention, the free radiation curable resin may be modified with PO, EO, or the like.

In addition to the above compounds, lower molecular weight polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadienes with unsaturated double bonds Resin, polythiol polyene resin, etc. can also be used as the above-mentioned free radiation curable resin.

The above-mentioned free radiation-curable resin can also be used in combination with a solvent-drying resin (thermoplastic resin, etc., as long as the solvent added to adjust the solid content at the time of coating is dried to become a resin such as a film). By using a solvent-drying resin in combination, the viscosity of the coating liquid can be easily adjusted when the anti-glare layer 3 is formed, thereby effectively preventing coating defects on the coating surface of the coating liquid. The solvent-drying resin that can be used in combination with the above-mentioned free radiation curable resin is not particularly limited, and a thermoplastic resin can generally be used.

The above-mentioned thermoplastic resin is not particularly limited, and examples thereof include styrene resins, (meth)acrylic resins, vinyl acetate resins, vinyl ether resins, halogen-containing resins, alicyclic olefin resins, and polycarbonate resins. Resin, polyester resin, polyamide resin, cellulose derivative, silicone resin, rubber or elastomer, etc. The above-mentioned thermoplastic resin is preferably non-crystalline and soluble in an organic solvent (especially a common solvent that can dissolve a plurality of polymers or curable compounds). In particular, from the viewpoint of film-forming properties, transparency or weather resistance, styrene resins, (meth)acrylic resins, alicyclic olefin resins, polyester resins, cellulose derivatives (cellulose derivatives) Esters, etc.) are preferred.

Moreover, the said anti-glare layer may contain thermosetting resin. The thermosetting resin is not particularly limited, and examples include phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, unsaturated polyester resins, polyurethane resins, and epoxy resins. , Amino alkyd resin, melamine-urea co-condensation resin, silicone resin, polysiloxane resin, etc.

The binder resin (A) preferably contains a hydroxyl-containing multifunctional acrylate. Thereby, it is easy to adjust the hydroxyl group concentration of the binder resin (A). Examples of the hydroxyl-containing polyfunctional acrylates are those shown in Table 1. Here, the so-called PE2A is neopentyl erythritol diacrylate, PE3A is neopentaerythritol triacrylate, and PE4A is neopentaerythritol tetraacrylate. In addition, DP5A is dineopentaerythritol pentaacrylate, and DP6A is dineopentaerythritol hexaacrylate. In addition, GR2A is glycerol diacrylate, and GR3A is glycerol triacrylate. [Table 1]

The hydroxyl concentration of the binder resin (A) should be greater than 0 mmol/g and less than 2.50 mmol/g. Thereby, the agglomeration state of the organic fine particles (B) and the inorganic fine particles (C) can be controlled, so that the arithmetic average roughness (Ra) and the average interval (Sm) of unevenness on the surface of the anti-glare layer 3 can be easily controlled.

When the binder resin (A) is composed of a single resin, the hydroxyl group concentration of the binder resin (A) is represented by the following formula 1 in terms of the number of hydroxyl groups contained in 1 molecule of the resin. Hydroxyl concentration (mmol/g) = (number of hydroxyls in 1 molecule)/(molecular weight)×1000 (formula 1)

When the binder resin (A) is composed of a plurality of resins, the hydroxyl group concentration can be calculated from Equation 1 for each binder resin, and a weighted average value can be calculated from the hydroxyl group concentration.

The hydroxyl concentration of the binder resin (A) is preferably greater than 0 mmol/g and less than 1.50 mmol/g, and more preferably greater than 0 mmol/g and less than 1.00 mmol/g.

In particular, when the organic fine particles (B) are generally composed of low-polarity copolymer particles, like acrylic-styrene copolymer particles, they are among the binder resins (A) of the matrix (dispersion medium). The lower the polarity, that is, the lower the hydroxyl concentration of the binder resin (A), the easier it is to increase the dispersibility of the organic fine particles (B) that are dispersants, and are less likely to form agglomerates. state. On the other hand, the higher the polarity of the binder resin (A), that is, the higher the hydroxyl group concentration of the binder resin (A), the easier the dispersibility of the organic fine particles (B) as a dispersoid is reduced, and aggregates are easily formed , The agglomerates of organic fine particles (B) are also more likely to become larger.

In the present invention, when the hydroxyl group concentration of the binder resin (A) is greater than 2.50 mmol/g, the agglomerates of the organic fine particles (B) may become too large, and in particular, the average interval (Sm) may become too large.

The hydroxyl concentration of the binder resin (A) can be adjusted by mixing multiple resin components with different hydroxyl concentrations. For example, among 100% of the resin component of the binder resin (A), 40% can be set as high-viscosity urethane acrylate (hydroxyl concentration 0mmol/g), and the remaining 60% can be set as PE2A The combination of /PE3A/PE4A generally controls the hydroxyl concentration in the form of a mixture of neopentyl erythritol polyacrylates with different hydroxyl concentrations. Especially in the mass ratio range of PE3A/PE4A=70/30~10/90, it is easy to show the performance of the anti-glare layer 3. It is also possible to use a mixture of di-neo-pentaerythritol polyacrylate instead of the above-mentioned mixture of neo-pentaerythritol polyacrylate. (Organic particles)

The organic fine particles (B) are also called diffusion particles, and are mainly used to form the surface unevenness of the anti-glare layer 3. Since the agglomerate contains the organic fine particles (B), the size of the uneven shape formed on the anti-glare layer 3 or the refractive index of the anti-glare layer 3 can be easily controlled, and the control of anti-glare properties and low reflectivity can be suppressed. The organic particles (B) are preferably transparent.

The organic particles (B) are preferably selected from acrylic resins, polystyrene resins, styrene-acrylic copolymer resins, polyethylene resins, epoxy resins, silicone resins, polyvinylidene fluoride resins and polyvinyl fluoride resins. Particles composed of at least one material in the constituted group. Among them, from the viewpoint of easy control of the refractive index, fine particles of styrene-acrylic copolymer are preferred.

The absolute value of the difference in refractive index between the binder resin (A) and the organic fine particles (B) is 0.005 or more and 0.25 or less. Therefore, the anti-glare layer 3 will have anti-glare properties under the interaction with the unevenness on the surface of the anti-glare layer 3. The absolute value of the difference in refractive index between the binder resin (A) and the organic fine particles (B) is preferably 0.005 or more and 0.15 or less, and more preferably 0.005 or more and 0.10 or less.

The organic fine particles (B) are preferably contained in the anti-glare layer 3 by 5 mass% or more and 20 mass% or less. If the content of the organic fine particles (B) is less than 5% by mass, the agglomerates of the organic fine particles (B) decrease, and the anti-glare performance of the anti-glare layer 3 may decrease. If the content of the organic fine particles (B) is more than 20% by mass, the agglomerates may increase or the agglomerates may become too large, and the anti-glare performance of the anti-glare layer 3 may decrease. The organic fine particles (B) are preferably contained in the anti-glare layer 3 by 6 mass% or more and 15 mass% or less, and more preferably contained in the anti-glare layer 3 by 8 mass% or more and 12 mass% or less. In addition, the organic fine particles (B) are preferably contained in the anti-glare layer 3 at 5 vol% or more and 20 vol% or less. It is more preferably 6.0 volume% or more and 15.0 volume% or less, and more preferably 8.0 volume% or more and 12.0 volume% or less.

The average primary particle size of the organic particles (B) should preferably be 2 µm or more and 7 µm or less. If the average primary particle size of the organic fine particles (B) is less than 2 µm, it is not easy to form a sufficient uneven shape on the surface of the anti-glare layer 3, and the anti-glare film 1 may have insufficient anti-glare performance. If the average primary particle size of the organic fine particles (B) is greater than 7 µm, the uneven shape of the surface of the anti-glare layer 3 will become too large, and the anti-glare performance of the anti-glare film 1 may be insufficient. The average primary particle size of the organic microparticles (B) is preferably 3 µm or more and 6 µm or less, and the average primary particle size of the organic microparticles (B) is more preferably 3 µm or more and 5 µm or less.

In addition, the "average primary particle size" in the present disclosure may be any method as long as the average primary particle size can be calculated, and examples include image analysis method, Coulter method, centrifugal sedimentation method, and laser diffraction scattering method. (Inorganic particles)

Inorganic particles are also called binder particles, and are included in the anti-glare layer 3 in such a way that they enter between adjacent organic particles (B) or the upper and lower portions of the organic particles (B). In particular, by allowing the inorganic fine particles (C) to enter between the adjacent organic fine particles (B) and the inorganic fine particles (C) between the organic fine particles (B) and the transparent substrate layer 2, the arithmetic average thickness can be maintained moderately (Ra) or the average interval of bumps (Sm).

The density of the inorganic particles (C) is preferably greater than the density of the organic particles (B). Thereby, when the composition for the anti-glare layer including the binder resin (A), the organic fine particles (B), and the inorganic fine particles (C) is applied to the transparent base material layer 2, the inorganic fine particles (C) are better than the organic fine particles ( B) is easier to settle first, and as a result, the inorganic fine particles (C) become easier to enter between the organic fine particles (B) and the transparent substrate layer 2.

Organic fine particles (B) desirably has a density in the range of 0.8 ~ 1.5g / cm ^3, the inorganic fine particles (C) desirably has a density in the range of 1.8 ~ 3.0g / cm ³ of.

The inorganic fine particles (C) are preferably, for example, at least one fine particle selected from the group consisting of aluminosilicate, talc, mica and silica. The inorganic fine particles (C) preferably contain fumed silica. Thereby, the affinity of the inorganic fine particles (C) to the organic fine particles (B) can be made high. The so-called vapor phase silicon dioxide refers to amorphous silicon dioxide produced by a dry method and having a particle size of 200 nm or less, which is obtained by reacting volatile compounds containing silicon in the gas phase.

Silanol groups exist on the surface of vapor-phase silica. The vapor-phase silica should be surface-treated, and the surface treatment should be hydrophobization. By surface treatment of the above-mentioned vapor-phase silica, the vapor-phase silica can be appropriately localized on the surface of the organic particles, and by the cohesive force of the vapor-phase silica itself, agglomeration of the organic particles (B) can be formed Things. In addition, it is also possible to improve the chemical resistance and saponification resistance of fumed silica itself. When there is no surface treatment (hydrophobization treatment), the fumed silica will be excessively present on the surface of the organic fine particles, and the cohesive force will increase, so it may not be possible to form a suitable uneven shape. The above-mentioned hydrophobization treatment is preferably, for example, methyl treatment, octyl silane treatment, or dimethyl polysiloxane oil treatment.

The average primary particle size of the inorganic fine particles (C) is preferably 1 nm or more and 200 nm or less. If the average primary particle size of the inorganic fine particles (C) is less than 1 nm, there may be cases where agglomerates of the organic fine particles (B) cannot be sufficiently formed in the anti-glare layer 3. If the average primary particle size of the inorganic fine particles (C) is greater than 200 nm, The inorganic fine particles (C) cannot easily enter between the organic fine particles (B) and the transparent substrate layer 2, and the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 may become too small to obtain anti-glare properties. The average primary particle size of the inorganic fine particles (C) is more preferably 10 nm or more and 200 nm or less, and the average primary particle size of the inorganic fine particles (C) is more preferably 12 nm or more and 40 nm or less.

The content of the inorganic fine particles (C) in the anti-glare layer 3 is preferably 1% by mass or more and 10% by mass or less. If the content of the inorganic fine particles (C) is less than 1% by mass, it is difficult for the inorganic fine particles (C) to enter between the organic fine particles (B) and form agglomerates, so that the anti-glare layer 3 having uneven shapes is not easily formed. If the content of the inorganic fine particles (C) is greater than 10% by mass, the arithmetic average roughness (Ra) of the surface of the anti-glare layer 3 may become too large and it is difficult to obtain anti-glare properties. The inorganic fine particles (C) are preferably contained in the anti-glare layer 3 by 1% by mass or more and 5% by mass or less, and more preferably in the anti-glare layer 3 by 1% by mass or more and 3% by mass or less. In addition, the content of the inorganic fine particles (C) in the anti-glare layer 3 is preferably 0.5% by volume or more and 5% by volume or less. It is more preferably 0.5 vol% or more and 2.5 vol% or less, and more preferably 0.5 vol% or more and 1.5 vol% or less. (Reflection reduction layer)

The reflection reduction layer 4 is formed by including a high refractive index layer 41, an ultra-high refractive index layer 42, and a low refractive index layer 43 (see FIG. 3). The reflection reduction layer 4 is formed on the anti-glare layer 3. The surface of the anti-glare layer 3 is formed with a high refractive index layer 41, the surface of the high refractive index layer 41 is formed with an ultra-high refractive index layer 42, and the surface of the ultra-high refractive index layer 42 is formed with a low refractive index layer 43. (High refractive index layer)

The high refractive index layer 41 is formed as a high refractive index layer having a higher refractive index than the anti-glare layer 3. The refractive index of the high refractive index layer 41 is preferably in the range of 1.60 or more and 1.70 or less, and the thickness (actual film thickness) is preferably in the range of 50 nm or more and 80 nm or less. Since the refractive index and thickness of the high refractive index layer 41 are in the aforementioned ranges, the light reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10 is suppressed, and comes from the anti-glare film 1 and the anti-glare low-reflection film The color of the reflected light of 10 will be adjusted to a moderate hue. If the refractive index of the high refractive index layer 41 is greater than the aforementioned range, the light reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10 will be further reduced, but the color of the reflected light will become too strong and unfavorable. In addition, if the thickness of the high refractive index layer 41 is greater than the aforementioned range, the color of the reflected light from the anti-glare film 1 and the anti-glare low-reflection film 10 will become bluish. If the thickness becomes larger, the anti-glare The reflectance of the film 1 and the anti-glare low-reflection film 10 will increase significantly, so they are not good. In addition, if the thickness of the high refractive index layer 41 is less than the aforementioned range, the reflection color becomes a color with a strong purple color, which is not preferable.

As mentioned above, if the thickness of the high refractive index layer 41 becomes larger, the reflected light tends to become bluish. However, as long as the thickness of the high refractive index layer 41 is in the range from 40 nm to 110 nm, the reflected light The color will become a color close enough to white. However, in order to make the color of the reflected light particularly close to white, the thickness of the high refractive index layer 41 is preferably within the range of 50 nm or more and 80 nm or less as described above. It is more preferable if the thickness is greater than 60 nm and less than 70 nm.

The high refractive index layer 41 is preferably formed of a reactive curable resin composition, for example, is preferably formed of at least one of a thermosetting resin composition and an ionizing radiation curable resin composition. Thermosetting resin composition contains phenol resin, urea resin, diallyl phthalate resin, melamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, amino alkyd resin, silicon Thermosetting resins such as resins and polysiloxane resins. A crosslinking agent, polymerization initiator, hardener, hardening accelerator, solvent, etc. can also be used together with the thermosetting resin as required. The thermosetting resin composition can be coated on the transparent substrate layer 2 (when it has an easy-to-adhesive layer, then the surface), and then the thermosetting resin composition is heated to thermally harden, thereby forming High refractive index layer 41.

The free radiation curable resin composition preferably contains a resin having an acrylate-based functional group. Examples of resins having acrylate-based functional groups include oligomers and prepolymers such as (meth)acrylates of polyfunctional compounds having a relatively low molecular weight. The aforementioned polyfunctional compound may include polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin, alkyd resin, spiroacetal resin, polybutadiene resin, polythiol polyene resin, poly Alcohol etc. It is also preferable that the free radiation-curable resin composition further contains a reactive diluent. Reactive diluents include monofunctional monomers such as ethyl (meth)acrylate, ethylhexyl (meth)acrylate, styrene, methylstyrene, and N-vinylpyrrolidone, and trimethylolpropane Tri(meth)acrylate, hexanediol (meth)acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, neopenteritol tri(meth)acrylic acid It is a multifunctional monomer of ester, dineopentyl erythritol hexa(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate.

類等。光硬化型樹脂組成物除了光聚合引發劑還可含有光敏劑，或可含有光敏劑來取代光聚合引發劑。光敏劑可舉正丁胺、三乙胺、三正丁膦、9-氧硫𠮿

等。所述光硬化型樹脂組成物例如可塗佈於透明基材層2上，接著對該光硬化型樹脂組成物照射紫外線等光使其光硬化，從而形成高折射率層41。When the free radiation curable resin composition is a photocurable resin composition such as an ultraviolet curable resin composition, the photocurable resin composition preferably contains a photopolymerization initiator. The photopolymerization initiator can include acetophenones, diphenyl ketones, α-pentyl oxime ester, and 9-oxysulfur 𠮿

Class etc. The photocurable resin composition may contain a photosensitizer in addition to the photopolymerization initiator, or may contain a photosensitizer instead of the photopolymerization initiator. The photosensitizer can include n-butylamine, triethylamine, tri-n-butylphosphine, 9-oxysulfur 𠮿

Wait. The photo-curable resin composition may be coated on the transparent substrate layer 2, and then the photo-curable resin composition may be irradiated with light such as ultraviolet rays to be photocured to form the high refractive index layer 41.

The refractive index of the high refractive index layer 41 can be easily adjusted by the composition of the resin composition used to form the high refractive index layer 41. It is also preferable to adjust the ratio of particles for adjusting the refractive index while the high refractive index layer 41 contains particles for adjusting the refractive index, thereby adjusting the refractive index of the high refractive index layer 41.

The particle size of the particles for refractive index adjustment is preferably sufficiently small, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles, in which case the light transmittance of the high refractive index layer 41 can be sufficiently maintained. The particle diameter of the particles for refractive index adjustment is particularly preferably in the range of 0.5 nm or more and 200 nm or less. The particle size of the particles for refractive index adjustment refers to the diameter of a circle (area equivalent circle) having the same area as the projected area of the particle calculated from the electron micrograph image. The particles for refractive index adjustment are preferably particles with a relatively high refractive index, and particularly preferably particles with a refractive index of 1.6 or more. The particles are preferably metal or metal oxide particles.

The content of the particles for refractive index adjustment in the high refractive index layer 41 is appropriately adjusted so that the refractive index of the high refractive index layer 41 can become an appropriate value, and it is particularly preferable to adjust the content of the particles for refractive index adjustment in the high refractive index layer 41. The ratio can be 5% by volume or more and 70% by volume or less. Specific examples of particles for refractive index adjustment include particles containing one or two or more oxides selected from titanium, aluminum, cerium, yttrium, zirconium, niobium, and antimony. Specific examples of oxides include ZnO (refractive index 1.90), TiO ₂ (refractive index 2.3 to 2.7), CeO ₂ (refractive index 1.95), Sb ₂ O ₅ (refractive index 1.71), SnO ₂ (refractive index 1.8 to 2.0 ), ITO (refractive index 1.95), Y ₂ O ₃ (refractive index 1.87), La ₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.05), Al ₂ O ₃ (refractive index 1.63), etc. The high refractive index layer 41 should also be given antistatic properties. At this time, the static electricity of the anti-glare film 1 and the anti-glare low-reflection film 10 is suppressed, and the adhesion of dust to the anti-glare film 1 and the anti-glare low-reflection film 10 is suppressed. Therefore, the high refractive index layer 41 preferably contains conductive particles.

The conductive particles may also function as particles for refractive index adjustment at the same time. The conductive particles are preferably nano particles, especially ultrafine particles with a particle size of 0.5 nm or more and 200 nm or less. The particle size of the conductive particles is also the diameter of the area equivalent circle. The material of the conductive particles can be exemplified by suitable metals and metal oxides having conductivity. Specifically, they can include oxides of one or more metals selected from the group consisting of indium, zinc, tin, and antimony, and more specifically Examples include indium oxide (ITO), tin oxide (SnO ₂ ), antimony/tin oxide (ATO), lead/titanium oxide (PTO), antimony oxide (Sb ₂ O ₅ ), and the like. In order to provide the high refractive index layer 41 with sufficient antistatic performance, it is preferable to make the sheet resistance of the high refractive index layer 41 10 ¹⁵ Ω/□ or less by containing conductive particles. The smaller the sheet resistance of the high refractive index layer 41, the more improved the antistatic property, so there is no special lower limit, but there is a limit to reduce the sheet resistance, so the actual lower limit of the sheet resistance of the high refractive index layer 41 is 10 ⁶ Ω/□ . The content of the conductive particles in the high refractive index layer 41 is appropriately adjusted so that the antistatic property of the high refractive index layer 41 can become an appropriate level, and the ratio of the conductive particles in the high refractive index layer 41 can be adjusted to 5 mass. % Or more and 70% by mass or less.

As mentioned above, the high refractive index layer 41 may also contain a cured product of a first ultraviolet-curable resin. The first ultraviolet-curable resin contains at least one of the alkoxysilane having a reactive organic functional group and its partially hydrolyzed polymer. A sort of. Therefore, for example, when the high refractive index layer 41 is to be formed from an ultraviolet-curable resin composition, the ultraviolet-curable resin composition preferably contains the first ultraviolet-curable resin.

Examples of the reactive organic functional group in the alkoxysilane having a reactive organic functional group include an acryl group, a methacryl group, a glycidyl group, an isocyanate group, and the like. Alkoxysilanes with reactive organic functional groups include 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methyl Allyloxypropyltriethoxysilane, 3-propenoxypropyltrimethoxysilane, 3-propenoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethyl Oxysilane, 3-glycidoxypropyltriethoxysilane, 3-isocyanatepropyltriethoxysilane, 3-isocyanatepropyltriethoxysilane, etc.

As mentioned above, when the high refractive index layer 41 contains the cured product of the first ultraviolet curable resin, the ratio of the alkoxysilane and the partially hydrolyzed polymer in the first ultraviolet curable resin to the high refractive index layer 41 Preferably, it is 3% by mass or more. The ratio is more preferably in the range of 5-10% by mass. At this time, the scratch resistance of the anti-glare film 1 and the anti-glare low-reflection film 10 will be improved, and the adhesion between the layers will also be improved. (Ultra-high refractive index layer)

The ultra-high refractive index layer 42 is formed as a high refractive index layer having a higher refractive index than the low refractive index layer 43. The refractive index of the ultra-high refractive index layer 42 is preferably in the range of 1.75 or more and 1.90 or less, and the thickness (actual film thickness) is preferably in the range of 100 nm or more and 160 nm or less. Since the refractive index and thickness of the ultra-high refractive index layer 42 are in the aforementioned ranges, the light reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10 is suppressed, and comes from the anti-glare film 1 and the anti-glare low-reflection film The color of the reflected light of the film 10 will be adjusted to an appropriate hue. If the refractive index of the ultra-high refractive index layer 42 is greater than the aforementioned range, the light reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10 will be further reduced, but the color of the reflected light will become too strong and unfavorable. In addition, if the thickness of the ultra-high refractive index layer 42 is greater than the aforementioned range, the color of the reflected light from the anti-glare film 1 and the anti-glare low-reflection film 10 will become bluish. The reflectivity of the glare film 1 and the anti-glare low-reflection film 10 will increase significantly, so they are not good. In addition, if the thickness of the ultra-high refractive index layer 42 is less than the aforementioned range, the reflected color will become a color with a strong purple color, which is not preferable.

As mentioned above, if the thickness of the ultra-high refractive index layer 42 becomes larger, the reflected light tends to become bluish. However, as long as the thickness of the ultra-high refractive index layer 42 is within the range of 100 nm or more and 180 nm or less, the reflection The color of light becomes a color close enough to white. However, in order to make the color of the reflected light particularly close to white, the thickness of the ultra-high refractive index layer 42 is preferably within the range of 100 nm or more and 160 nm or less as described above. It is more preferable if the thickness is greater than 130 nm and less than 160.

The ultra-high refractive index layer 42 is preferably formed of a reactive curable resin composition, for example, is preferably formed of at least one of a thermosetting resin composition and an ionizing radiation curable resin composition. The thermosetting resin composition, the free radiation curing resin composition, and the photopolymerization initiator may be the same as the resins listed in the description of the high refractive index layer 41.

The refractive index of the ultra-high refractive index layer 42 can be easily adjusted by the composition of the resin composition used to form the ultra-high refractive index layer 42. It is also preferable to adjust the ratio of particles for adjusting the refractive index while the ultra-high refractive index layer 42 contains particles for adjusting the refractive index, thereby adjusting the refractive index of the ultra-high refractive index layer 42.

The particle size of the particles for refractive index adjustment is preferably small enough, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles. In this case, the light transmittance of the high refractive index layer 42 can be sufficiently maintained. The particle diameter of the particles for refractive index adjustment is particularly preferably in the range of 0.5 nm or more and 200 nm or less. The particle size of the particles for refractive index adjustment refers to the diameter of a circle (area equivalent circle) having the same area as the projected area of the particle calculated from the electron micrograph image.

The particles for refractive index adjustment are preferably particles with a relatively high refractive index, and particularly preferably particles with a refractive index of 1.6 or more. The particles are preferably metal or metal oxide particles.

The content of the particles for refractive index adjustment in the ultra-high refractive index layer 42 is appropriately adjusted so that the refractive index of the ultra-high refractive index layer 42 can become an appropriate value, and it is particularly suitable to be adjusted for the refractive index adjustment of the ultra-high refractive index layer 42 The ratio of particles can be 5 vol% or more and 70 vol% or less.

Specific examples of particles for refractive index adjustment include particles containing one or two or more oxides selected from titanium, aluminum, cerium, yttrium, zirconium, niobium, and antimony. Specific examples of oxides include ZnO (refractive index 1.90), TiO ₂ (refractive index 2.3 to 2.7), CeO ₂ (refractive index 1.95), Sb ₂ O ₅ (refractive index 1.71), SnO ₂ (refractive index 1.8 to 2.0 ), ITO (refractive index 1.95), Y ₂ O ₃ (refractive index 1.87), La ₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.05), Al ₂ O ₃ (refractive index 1.63), etc.

The ultra-high refractive index layer 42 also preferably contains particles of one or more oxides selected from titanium, aluminum, cerium, yttrium, zirconium, niobium, and antimony, as well as methacrylic functional silane and acrylic functional At least one of silanes. At this time, the adhesion between the ultra-high refractive index layer 42 and the low refractive index layer 43 is improved. Examples of the methacrylic functional silane include 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, and the like. Examples of the acrylic functional silane include 3-propenoxypropyltrimethoxysilane, 3-propenoxypropylmethyldimethoxysilane, and the like.

The content of methacrylic functional silane and acrylic functional silane in the ultra-high refractive index layer 42 is not particularly limited. The ratio of the total amount of methacrylic functional silane and acrylic functional silane in the ultra-high refractive index layer 42 is suitable It is the range of 5% by mass or more and 30% by mass or less. If the aforementioned ratio is 5% by mass or more, the adhesion between the ultra-high refractive index layer 42 and the low-refractive index layer 43 becomes sufficiently high, and if the aforementioned ratio is less than 30% by mass, the ultra-high refractive index layer 42 The cross-linking density in the medium will be sufficiently increased, and the hardness of the ultra-high refractive index layer 42 will be sufficiently high.

For the main surface of the ultra-high refractive index layer 42 opposite to the high refractive index layer 41, it is preferable to perform surface treatment before forming the low refractive index layer 43. At this time, the wettability, adhesion, etc. between the ultra-high refractive index layer 42 and the low refractive index layer 43 can be improved. Surface treatment methods include physical surface treatment such as plasma treatment, corona discharge treatment, flame treatment, and chemical surface treatment using coupling agents, acids, and alkalis.

As mentioned above, the ultra-high refractive index layer 42 may also contain a cured product of a second ultraviolet-curable resin. The second ultraviolet-curable resin includes an alkoxysilane with a reactive organic functional group and one of the partially hydrolyzed polymers. At least one. Therefore, for example, when the ultra-high refractive index layer 42 is to be formed from an ultraviolet-curable resin composition, the ultraviolet-curable resin composition preferably contains a second ultraviolet-curable resin.

Examples of the reactive organic functional group in the alkoxysilane having a reactive organic functional group include an acryl group, a methacryl group, a glycidyl group, an isocyanate group, and the like. Alkoxysilanes with reactive organic functional groups include 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methyl Allyloxypropyltriethoxysilane, 3-propenoxypropyltrimethoxysilane, 3-propenoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethyl Oxysilane, 3-glycidoxypropyltriethoxysilane, 3-isocyanatepropyltriethoxysilane, 3-isocyanatepropyltriethoxysilane, etc.

As mentioned above, when the ultra-high refractive index layer 42 contains a cured product of the second ultraviolet-curable resin, compared to the ultra-high refractive index layer 42, the alkoxysilane and its partially hydrolyzed polymer in the second ultraviolet-curable resin The ratio is preferably 3% by mass or more. The ratio is more preferably in the range of 5-10% by mass. At this time, the scratch resistance of the anti-glare film 1 and the anti-glare low-reflection film 10 will be improved, and the adhesion between the layers will also be improved. (Low refractive index layer)

The refractive index of the low refractive index layer 43 is lower than the refractive index of any one of the transparent base material layer 2, the high refractive index layer 41, and the ultra-high refractive index layer 42. The refractive index of the low refractive index layer 43 is preferably in the range of 1.30 or more and 1.40 or less, and its thickness (actual film thickness) is preferably in the range of 70 nm or more and 110 nm or less.

Since the refractive index of the low-refractive index layer 43 is in the aforementioned range, the reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10 will be The color of the reflected light from the anti-glare film 1 and the anti-glare low-reflection film 10 can be adjusted appropriately by the thickness of the low refractive index layer 43 within the aforementioned range.

As long as the thickness of the low refractive index layer 43 is in the range of 70 nm or more and 130 nm or less, the color of the reflected light becomes a color close enough to white. However, in order to make the color of the reflected light particularly close to white, the thickness of the low refractive index layer 43 is preferably in the range of 70 nm or more and 110 nm or less as described above. It is more preferable if the thickness is in the range of 70 nm or more and less than 80 nm.

Also, as described above, when the anti-glare film 1 and the anti-glare low-reflection film 10 are used in combination with an ITO film, in order to overlap the reflected light from the anti-glare film 1 and the anti-glare low-reflection film 10 with the reflected light from the ITO film The color of the light is close to white, and the thickness of the low refractive index layer 43 is preferably in the range of 80 nm or more and 130 nm or less. It is more preferable if the thickness is greater than 110 nm and less than 130 nm.

The low refractive index layer 43 is formed of, for example, a composition containing a binder material and particles for refractive index adjustment used as needed. When the binder material and the particles for refractive index adjustment are used in combination, the refractive index of the low refractive index layer 43 can be appropriately adjusted by the combination of the two, the blending ratio, and the like.

The binder material can include silicone resins, polymers with at least one of saturated hydrocarbons and polyethers as the main chain (e.g., UV curable resin compositions, thermosetting resin compositions, etc.), and polymers containing Resins containing units of fluorine atoms in the chain, etc.

The silicone resin may include the partial hydrolysis condensation of silicone represented by RmSi(OR')n (R and R'are alkyl groups with 1 to 10 carbons, m+n=4, and m and n are each an integer). Objects are oligomers and polymers. Silicone can specifically exemplify tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetra-n-propoxysilane, tetra-n-butoxysilane, tetra-secondary butoxysilane, four -Tertiary butoxysilane, tetrapentaethoxysilane, tetrapentaisopropoxysilane, tetrapentan-propoxysilane, tetrapentan-butoxysilane, tetrapenta-2-butoxysilane, four Five-tertiary butoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, dimethyldimethoxysilane, two Methyldiethoxysilane, dimethylethoxysilane, dimethylmethoxysilane, dimethylpropoxysilane, dimethylbutoxysilane, methyldimethoxysilane, methyl Diethoxysilane, hexyltrimethoxysilane, etc.

As the binder material, a reactive organosilicon compound having a plurality of groups (polymerizable double bond groups, etc.) that undergo reactive crosslinking by heat or free radiation can also be used. The molecular weight of the organosilicon compound is preferably below 5000. The reactive organosilicon compound may include single-terminal vinyl functional polysiloxane, two-terminal vinyl functional polysiloxane, single-terminal vinyl functional polysiloxane, two-terminal vinyl functional polysiloxane, and Vinyl functional polysiloxane and vinyl functional polysiloxane etc. obtained by reaction of these compounds. In addition to these, reactive organosilicon compounds can also include 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, etc. (Meth) acryloxy silane compound.

The particles for adjusting the refractive index should preferably be particles with a lower refractive index. The materials of the particles for refractive index adjustment include silicon dioxide, magnesium fluoride, lithium fluoride, aluminum fluoride, calcium fluoride, sodium fluoride, and the like. The particles for refractive index adjustment preferably include hollow particles. The so-called hollow particle is a particle having a cavity surrounded by a shell. The refractive index of the hollow particles is preferably 1.20~1.45. Regarding the particles for refractive index adjustment, it is advisable to perform surface treatment to improve the wettability of the binder material as required.

The particle size of the particles for refractive index adjustment is preferably small enough, that is, the particles for refractive index adjustment are preferably so-called ultrafine particles. In this case, the light transmittance of the low refractive index layer 43 can be sufficiently maintained. The particle size of the particles for refractive index adjustment is particularly preferably in the range of 0.5 nm to 200 nm. The particle size of the particles for refractive index adjustment refers to the diameter of a circle (area equivalent circle) having the same area as the projected area of the particle calculated from the electron micrograph image.

The content of the particles for refractive index adjustment in the low refractive index layer 43 is appropriately adjusted to the value of the refractive index of the low refractive index layer 43 to become an appropriate value, and it is particularly suitable to be adjusted to the particles for refractive index adjustment in the low refractive index layer 43 The ratio can be 20~99% by volume.

The composition may further contain water-repellent and oil-repellent materials. At this time, antifouling properties can be imparted to the low refractive index layer 43. As the water-repellent and oil-repellent materials, general wax-based materials and the like can be used. Especially if a fluorine-containing compound is used, the removal of dirt, fingerprints, etc. of the low refractive index layer 43 will be improved, and at the same time the friction resistance of the surface of the low refractive index layer 43 will be reduced, so that the abrasion resistance of the low refractive index layer 43 will be improved. .

An ideal form of the low refractive index layer 43 can be exemplified by a polymer composed of a mixture of alkoxysilane and alkoxysilane having a fluorocarbon skeleton, and containing hollow silica particles. In this case, the effects of ensuring low refractive index, imparting antifouling function, and imparting chemical resistance can be obtained, which is preferable. The above-mentioned alkoxysilane can be exemplified by polymethoxysilane and the like. In addition, the alkoxysilane having a fluorocarbon skeleton can be exemplified by trimethoxysilyl dodecafluorohexane and the like. The mixture of alkoxysilane and alkoxysilane with fluorocarbon skeleton can be prepared by mixing alkoxysilane with fluorocarbon skeleton in the ratio of 5 to 1900 parts by mass relative to 100 parts by mass of alkoxysilane . In addition, the polymer of a mixture of an alkoxysilane and an alkoxysilane having a fluorocarbon skeleton can be produced, for example, by a polymerization method such as a sol-gel method. The molecular weight of the polymer of the mixture of alkoxysilane and alkoxysilane having a fluorocarbon skeleton is preferably 500-3000. In addition, the hollow silica particles are as described above, the refractive index is preferably 1.20 to 1.45, and the particle size is preferably in the range of 0.5 nm to 200 nm. In addition, the low refractive index layer 43 preferably contains hollow silica particles in a ratio of 5 to 233 parts by mass relative to 100 parts by mass of a polymer of a mixture of alkoxysilane and alkoxysilane having a fluorocarbon skeleton.

The low refractive index layer 43 can be formed by the following method: coating the composition as described above on the ultra-high refractive index layer 42, and applying heating, humidification, ultraviolet irradiation, and electron to the composition according to the properties of the binder material. Treatments such as beam irradiation make it harden. (3) Modifications

The embodiment is only one of various embodiments of the present disclosure. As long as the implementation form can achieve the purpose of cost disclosure, various changes can be made in response to the design and so on.

The anti-glare film 1 and the anti-glare low-reflection film 10 may be provided with an unevenness adjustment layer. The unevenness adjustment layer adjusts the unevenness of the surface of the anti-glare layer 3 to adjust the anti-glare properties and reflectivity of the anti-glare film 1 and the anti-glare low-reflection film 10.

Example (Example 1) A light-transmitting transparent substrate layer (thickness 80µm cellulose triacetate resin film, manufactured by Fujifilm Co., TD80UL) was prepared, and the following was coated on one side of the transparent substrate film The composition for the anti-glare layer of the indicated composition forms a coating film. Next, the coating film formed was dried in a circulating air dryer at 80 deg.] C of 1 minute, whereby the coating film of the solvent was evaporated, and the cumulative amount of light to be 150mJ / cm ² of the cured coating film irradiated with ultraviolet rays, Thereby, an anti-glare layer with a thickness of 5 µm (when cured) was formed, and the anti-glare film of Example 1 was produced. (Composition for anti-glare layer) Organic fine particles (acrylic-styrene copolymer particles, average primary particle size 3.5 µm, refractive index 1.555, manufactured by Sekisui Chemical Industry Co., Ltd.): 10 parts by mass of inorganic fine particles (gas phase silica, Octylsilane treatment; average primary particle size 12nm, density: 2.2g/cm ³ , manufactured by AEROSIL Japan): 2 parts by mass of a mixture of neopentyl erythritol polyacrylate with a hydroxyl concentration of 0.001 mmol/g or more and 0.15 mmol/g or less : 60 parts by mass of urethane acrylate (product name: LUXYDIR V-4000BA, manufactured by DIC Co., Ltd.): 40 parts by mass of IRGACURE 184 (manufactured by BASF Japan, photopolymerization initiator): 5 parts by mass of branched fluorine Surfactant (Ftergent 681, manufactured by NEOS COMPANY LIMITED): 3.3 parts by mass

For the above-mentioned organic microparticles, inorganic microparticles, neopentylerythritol polyacrylate mixture, urethane acrylate, IRGACURE 184 and a mixture of branched fluorine-based surfactants, toluene/cyclohexanone=70 parts by mass/30 The mass part of the mixed solvent is diluted to the effective ingredient (vehicle) and becomes 30%.

In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is calculated as 0.0004 mmol/g or more and 0.06 mmol/g or less. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05.

Next, an unevenness adjustment layer is formed as a second layer on the anti-glare layer. When forming the unevenness adjustment layer, 95 parts by mass of p-urethane acrylate (product name: LUXYDIR V-4000BA, manufactured by DIC Co., Ltd.) was mixed with 5 parts by mass of IRGACURE 184 (made by BASF Japan, photopolymerization initiator), and The active ingredient (vehicle) was diluted with propylene glycol monomethyl ether to 10%, and the unevenness adjustment layer material was obtained. The unevenness adjustment layer material was applied to the surface of the anti-glare layer with a wire bar coater #6 to form a coating film. Next, the coating film formed was dried in a circulating air dryer at 80 deg.] C of 1 minute, whereby the coating film of the solvent was evaporated, and the cumulative amount of light to be 150mJ / cm ² of the cured coating film irradiated with ultraviolet rays, A 0.9µm bump adjustment layer is formed.

Next, a high refractive index layer is formed on the surface of the unevenness adjustment layer as the third layer. When the high refractive index layer is formed, it is effective against the total amount of acrylic ultraviolet curable resin and high refractive index particles. It is effective against acrylic ultraviolet curable resin (“SEIKABEAM MD-2 clear” manufactured by Dainichi Seiki Kogyo Co., Ltd.) Ingredients (solid content) 60% by mass) mixed with titanium oxide particles as high refractive index particles ("760T" manufactured by TAYCA Co., Ltd., dispersion solvent: toluene, solid content 48% by mass) 40% by mass (acrylic ultraviolet curable resin , 60% by mass), and diluted with a toluene solvent to a solid content of 2% by mass to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer with a wire bar coater #3, dried at 80°C for 5 minutes, and then ^{cured by UV irradiation (500 mJ/cm 2} ) to form it. The high refractive index layer has a refractive index of 1.63 and a film thickness of 60 nm.

Then, an ultra-high refractive index layer is formed on the surface of the high refractive index layer as the fourth layer. When the ultra-high refractive index layer is formed, it is based on the total amount of acrylic ultraviolet curable resin and high refractive index particles, compared to acrylic ultraviolet curable resin ("SEIKABEAM MD-2 clear" manufactured by Dainichi Seiki Kogyo Co., Ltd.) Active ingredient (solid content) 60% by mass) mixed with titanium oxide particles as high refractive index particles ("760T" manufactured by TAYCA Co., Ltd., dispersing solvent: toluene, solid content 48% by mass) 70% by mass (acrylic ultraviolet curing type) Resin, 30% by mass), and diluted with a toluene solvent to a solid content of 12% by mass, to obtain a high refractive index layer material. The high refractive index material was coated on the hard coat layer with a wire bar coater #3, dried at 80°C for 5 minutes, and then ^{cured by UV irradiation (500 mJ/cm 2} ) to form it. The high refractive index layer has a refractive index of 1.76 and a film thickness of 130 nm.

Next, a low refractive index layer is formed on the ultra-high refractive index layer as the fifth layer. When forming the low refractive index layer, the hollow silica microparticle sol ("THRULYA 4320" manufactured by Nikkei Catalytic Kasei Co., Ltd., solvent dispersion sol, solid content 20%) is mixed with 58% by mass relative to the total amount of the low refractive layer material , Dineopentaerythritol polyacrylate ("ARONIX M-402" manufactured by Toagosei Co., Ltd.) 40% by mass, photopolymerization initiator Omnirad127 (made by BASF) 2% by mass, and diluted with methyl isobutyl ketone to be effective The composition (vehicle) is 2.4% to obtain a low-refractive layer material.

Use wire rod coater #3 to coat the low-refractive index layer material to form a coating film with a thickness of 90nm, and place it at 120°C for 1 minute to dry, then UV irradiation (500mJ/500mJ/ cm ² ) for 5 minutes to harden and form. The high refractive index layer has a refractive index of 1.37 and a film thickness of 90 nm.

Through the above, an anti-reflection member having a structure in which a transparent substrate layer, an anti-glare layer, an unevenness adjustment layer, a high refractive index layer, an ultra-high refractive index layer, and a low refractive index layer are sequentially laminated is obtained. (Example 2)

The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the neopentyl erythritol polyacrylate mixture was replaced with a neopentyl erythritol polyacrylate mixture with a hydroxyl concentration of 1.05 mmol/g. In the same manner as in Example 1, an anti-glare film was prepared. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is calculated as 0.63 mmol/g ((1.05×60+0×40)/(60+40)=0.63). In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 3)

The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the neopentyl erythritol polyacrylate mixture was replaced with a neopentyl erythritol polyacrylate mixture with a hydroxyl group concentration of 2.80 mmol/g. In the same manner as in Example 1, an anti-glare film was prepared. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer was calculated as 1.68 mmol/g. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 4)

The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the neopentyl erythritol polyacrylate mixture was replaced with a neopentyl erythritol polyacrylate mixture with a hydroxyl group concentration of 3.85 mmol/g, except that In the same manner as in Example 1, an anti-glare film was prepared. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer was calculated as 2.31 mmol/g. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 5)

Except that the neopentyl erythritol polyacrylate mixture was replaced with a dineopentyl erythritol polyacrylate mixture with a hydroxyl group concentration of 0.63 mmol/g, the anti-glare layer composition was prepared in the same manner as in Example 1, except that The anti-glare film was made in the same manner as in Example 1. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is 0.38 mmol/g as a calculated value. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 6)

Except that the neopentylerythritol polyacrylate mixture was substituted with a dineopentylerythritol polyacrylate mixture with a hydroxyl group concentration of 1.00 mmol/g, the anti-glare layer composition was prepared in the same manner as in Example 1, except that The anti-glare film was made in the same manner as in Example 1. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer was 0.60 mmol/g as a calculated value. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 7)

Except for substituting the mixture of neopenteritol polyacrylate with a mixture of dineopentitol polyacrylate with a hydroxyl group concentration of 2.10 mmol/g, a composition for the anti-glare layer was prepared in the same manner as in Example 1, except that The anti-glare film was made in the same manner as in Example 1. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is 1.26 mmol/g as a calculated value. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Example 8)

Except that the neopentyl erythritol polyacrylate mixture is set to a hydroxy group concentration of 0.27mmol/g, the organic microparticles are replaced with organic microparticles (acrylic acid-styrene copolymer particles, average primary particle size). The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the refractive index was 1.525, and the refractive index was 1.525. . In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer was calculated as 0.16 mmol/g. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05.

Here, by making the ratio of the acrylic component of the acrylic-styrene copolymer particles higher than that of Examples 1-7, the refractive index of the organic particles can be reduced, whereby the density of the acrylic component will be greater than the density of the styrene component, so the organic The density of fine particles also increases. We believe that the increase in the composition of the acrylic resin makes the polarity of the organic particles higher than that of Example 1, and the hydroxyl group concentration of the binder resin (A) is also higher than that of Example 1. Therefore, it is believed that the polarity of the dispersion medium and the dispersion can be ensured to a certain extent. Therefore, the dispersibility of the organic fine particles is ensured, and the agglomerates of the organic fine particles affect the unevenness of the anti-glare layer surface, so that Ra and Sm suitable for the present invention can be obtained. (Example 9)

Except that the neopentyl erythritol polyacrylate mixture is set to a hydroxy group concentration of 0.63 mmol/g of dineopentaerythritol polyacrylate mixture, and the organic microparticles are replaced with organic microparticles (acrylic acid-styrene copolymer particles, average primary particle size) The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the refractive index was 1.525, and the refractive index was 1.525. . In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is 0.38 mmol/g as a calculated value. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.025. (Comparative example 1)

The anti-glare layer was prepared in the same manner as in Example 1, except that the organic fine particles were replaced with organic fine particles (acrylic-styrene copolymer particles, average primary particle size 3.5 µm, refractive index 1.525, manufactured by Sekisui Chemical Industry Co., Ltd.) Using the composition, an anti-glare film was prepared in the same manner as in Example 1 except for the above. In addition, the hydroxy group concentration of the binder of the anti-glare composition is calculated as 0.0004 mmol/g or more and 0.06 mmol/g or less. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.025.

Here, as in Examples 8 and 9, by making the ratio of the acrylic component of the acrylic-styrene copolymer particles higher than that of Examples 1 to 7, the refractive index of the organic fine particles can be reduced, thereby reducing the density of the acrylic component. It is larger than the styrene content, so the density of organic particles also becomes larger. We believe that the increase in the composition of the acrylic resin makes the polarity of the organic microparticles higher than that of Example 1, but the hydroxyl concentration of the binder resin (A) is the same as that of Example 1, so the difference in polarity between the organic microparticles and the binder resin becomes larger. Therefore, the organic fine particles agglomerate larger than that of Example 1, or the density of the organic fine particles becomes larger and thus they tend to settle. In this case, the influence of the organic fine particles on the unevenness of the anti-glare layer surface is reduced. As a result, Ra and Sm become higher than Example 1 is smaller, and Ra and Sm suitable for the invention of this case cannot be obtained. (Comparative example 2)

The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the neopentylerythritol polyacrylate mixture was substituted with a neopentylerythritol polyacrylate mixture with a hydroxyl group concentration of 4.9 mmol/g. In the same manner as in Example 1, an anti-glare film was prepared. In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer was calculated as 2.94 mmol/g. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.05. (Comparative example 3)

In addition to setting the mixture of neopentyl erythritol polyacrylate to a mixture of dineopritol polyacrylate with a hydroxyl concentration of 2.1 mmol/g, and replacing the organic particles with organic particles (acrylic acid-styrene copolymer particles, the average primary particle size The composition for the anti-glare layer was prepared in the same manner as in Example 1, except that the refractive index was 1.525, and the refractive index was 1.525. . In addition, the hydroxyl group concentration of the binder resin of the composition for the anti-glare layer is 1.26 mmol/g as a calculated value. In addition, the absolute value of the difference in refractive index between the binder resin and the organic fine particles is 0.025. (Measurement method and evaluation)

(1) Ra: The arithmetic average roughness of the surface of the anti-glare layer, which is a value obtained in accordance with JIS B 0601-1994 and measured with a surface roughness tester: ET3000i/Kosaka Research Institute Co., Ltd.

(2) Sm: The average interval of the unevenness on the surface of the anti-glare layer. It is a value obtained in accordance with JIS B 0601-1994 and measured with a surface roughness measuring device: ET3000i/Kosaka Research Institute Co., Ltd.

(3) T%: the transmittance, preferably 90% or more and 100% or less. It is measured in accordance with JIS K 7361-1: 1997 using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., model NDH2000).

(4) Haze: It is the ratio of the transmittance of parallel light to the transmittance of diffused light among the incident light, preferably 1% or more and 20% or less. It is measured in accordance with JIS K 7361-1: 1997 using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., model NDH2000). (5) Visual reflectivity: SCI(Y)

The reflectance of the visual sensitivity including unidirectional reflected light and diffuse reflected light is preferably 0.7 or less. After coating the back of the transparent substrate with black Magic Ink (registered trademark) and attaching black vinyl tape (Nitto Denko, No. 21), use a spectrophotometer (KONICA MINOLTA JAPAN (stock) system, model CM-3600d), the visual reflectance SCI(Y) is measured under the conditions of C light source, 10° field of view, measuring diameter 4mmΦ, and SCI. (6) Reflective chromaticity (a ^* , b ^* )

The back side of the transparent base material on which the composition for the anti-glare layer has been coated is painted with black Magic Ink (registered trademark) and then black vinyl tape (Nitto Denko, No. 21) is attached. , Using a spectrophotometer (manufactured by KONICA MINOLTA JAPAN (stock), model CM-3600d), under the conditions of C light source, 10° field of view, measuring diameter 4mmΦ, and SCI, measure the reflection chromaticity (a ^* , b ^* ). SCI(a ^* ) is the red-green hue index including unidirectional reflection light and diffuse reflection light, preferably in the range of -5 to 5 or less. SCI (b ^* ) is the yellow-blue hue index including unidirectional reflection light and diffuse reflection light, preferably in the range of -5 to 5 or less. (7) Anti-glare

[表3]

The back side of the transparent base material on which the composition for the anti-glare layer has been coated is painted with black Magic Ink (registered trademark) and then black vinyl tape (Nitto Denko, No. 21) is attached. , Evaluate the reflection of the fluorescent lamp on the side of the anti-glare layer. The "A" series is good without reflection, and the "C" series has obvious reflections. [Table 2]

[table 3]

1: Anti-glare film 2: Transparent substrate layer 3: Anti-glare layer 4: reflection reduction layer 10: Anti-glare low-reflection film (anti-glare and low-reflection film) 41: High refractive index layer 42: Ultra-high refractive index layer 43: low refractive index layer A: Binder resin B: Organic particles C: Inorganic particles

Fig. 1 is a cross-sectional view showing an embodiment of the anti-glare film of the present disclosure.

Fig. 2 shows an embodiment of the anti-glare film of the present disclosure, and is a partially enlarged schematic diagram.

Fig. 3 is a cross-sectional view showing an embodiment of the anti-glare and low-reflection film of the present disclosure.

Fig. 4 shows an embodiment of the anti-glare and low-reflection film of the present disclosure, and is a partially enlarged schematic diagram.

Fig. 5 shows a comparative example with respect to the anti-glare film of the present disclosure, and is a partially enlarged schematic diagram.

FIG. 6 shows a comparative example with respect to the anti-glare and low-reflection film of the present disclosure, and is a partially enlarged schematic diagram.

FIG. 7 shows other comparative examples with respect to the anti-glare and low-reflection film of the present disclosure, and is a partially enlarged schematic diagram.

FIG. 8 shows other comparative examples with respect to the anti-glare film of the present disclosure, and is a partially enlarged schematic diagram.

FIG. 9 shows other comparative examples with respect to the anti-glare and low-reflection film of the present disclosure, and is a partially enlarged schematic diagram.

1: Anti-glare film

2: Transparent substrate layer

3: Anti-glare layer

Claims (7)

An anti-glare film comprising a transparent substrate layer and an anti-glare layer on at least one surface of the transparent substrate layer, the anti-glare layer containing a binder resin, organic particles and inorganic particles dispersed in the binder resin; The absolute value of the difference between the refractive index of the binder resin and the organic fine particles is 0.005 or more and 0.25 or less; The average primary particle size of the aforementioned inorganic particles is smaller than the average primary particle size of the aforementioned organic particles; The arithmetic average roughness (Ra) of the aforementioned anti-glare layer surface is in the range of 0.080 μm or more and 0.210 μm or less, and the average interval (Sm) of the unevenness on the surface of the anti-glare layer is 0.100 μm or more and 0.200 μm or less. The anti-glare film of claim 1, wherein the hydroxyl group concentration of the binder resin is greater than 0 mmol/g and less than 2.50 mmol/g. The anti-glare film of claim 2, wherein the aforementioned binder resin contains a hydroxyl-containing acrylate. The anti-glare film according to any one of claims 1 to 3, wherein the average primary particle size of the aforementioned organic fine particles is 2 µm or more and 7 µm or less. The anti-glare film according to any one of claims 1 to 3, wherein the average primary particle size of the aforementioned inorganic fine particles is 1 nm or more and 200 nm or less. The anti-glare film according to any one of claims 1 to 3, wherein the aforementioned inorganic fine particles contain fumed silica. A film with anti-glare properties and low reflectivity. The anti-glare layer in the anti-glare film of any one of claims 1 to 6 is provided with: A high refractive index layer with a refractive index of 1.60 or more and 1.70 or less, An ultra-high refractive index layer with a refractive index above 1.75 and below 1.90, and A low refractive index layer with a refractive index of 1.30 or more and 1.40 or less.

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