JP2002182015A - Anti-glare film and method for producing the same - Google Patents

Abstract

(57) [Summary] (with correction) [Problems] (1) High anti-glare property, (2) clearness of transmitted image, and (3) high light transmittance (total light transmittance), and (4) ) High anti-glare, anti-glare film,
And a production method thereof. SOLUTION: A non-aggregating particle to be added to a resin is used having a specific particle size, a difference in refractive index between the resin and the particle is set to 0.05 to 0.15, and a good solvent and a poor solvent for the resin are used as solvents. It is made into a paint using a solvent, and this paint is applied on a base film and dried, and as the good solvent in the paint film at the time of drying decreases, the particles and the resin are gelled by the action of the poor solvent, and good unevenness is obtained. Was produced, and by obtaining in this manner, various properties required for the antiglare film could be satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antiglare film which is disposed on the front of a CRT display or a liquid crystal display, and which diffuses light entering the display from outside to reduce glare. .

[0002]

2. Description of the Related Art In a CRT display, accelerated electrons collide with a phosphor inside a glass on the front side to give energy, and the phosphor emits light.
The red, green, and blue light is emitted toward the front side. In a liquid crystal display, the liquid crystal itself does not emit light, but is illuminated from the back in order to enhance the visibility of the liquid crystal image, so that the display as a whole emits light toward the front. When a display is used indoors, illumination light such as a fluorescent lamp is incident on the display surface, and when the light is reflected, the screen becomes dazzling, and the fluorescent lamp is reflected, so that it is difficult to recognize characters and the like. .

[0003] An antiglare film having a light diffusing layer formed by applying a resin coating containing silica on a transparent base film is arranged on the front surface of the display to diffuse external light which causes glare. Reducing screen glare has already been done. Conventional anti-glare films have irregularities on the surface of the light-diffusing layer due to aggregation of particles such as cohesive silica, and resin beads with a particle size larger than the thickness of the coating film are added to make the surface irregular. There is a product obtained by using a shaped film having irregularities on the surface, laminating it on a non-solidified coating surface, transferring the irregularity shape, and then peeling the shaped film. Each of them has a light diffusing property, shows a certain anti-glare effect, and is easily applied to a display because it is a thin film. However, when the above-mentioned light emitted from the display toward the front passes through this anti-glare film, a brilliant shine called scintillation is generated on the film surface, and the visibility of the display object is increased. There is a problem that decreases. As the performance of the anti-glare film used by placing it on the front of the display, it is highly anti-glare,
High image clarity, high light transmittance (= total light transmittance), and high light-diffusing property and high anti-glare property (= anti-reflection property of external light such as fluorescent light (reflection It is important that the anti-glare film has a high anti-glare property.

[0004]

SUMMARY OF THE INVENTION The present invention provides an anti-glare effect, a clear image transmission, a total light transmittance, and an anti-reflection without significantly changing the conventional thin film shape as described above. It is an object of the present invention to provide an anti-glare film which has high properties and satisfies all points, and a method for producing the same.

[0005]

In the present invention, the point that a resin coating material in which particles are dispersed is applied to form an antiglare film is common to the conventional one, but specific non-aggregating particles added to the resin are used. Use a resin with a particle size, make the refractive index difference between the resin and the particles 0.05 to 0.15, make a paint using a good solvent and a poor solvent for the resin as a solvent, and apply this paint on the base film. As the good solvent in the coating film at the time of drying decreases, the particles and the resin gel due to the action of the poor solvent, and good unevenness is generated. It has been found that the properties required for the film are satisfied.

The first invention comprises at least a light-diffusing resin film in which non-aggregated light-transmitting fine particles are dispersed in a light-transmitting resin, wherein the light-transmitting fine particles have a particle size of 1.0 to 5%. 0.0μ
m, the difference between the refractive index of light of the light-transmitting fine particles and the refractive index of light of the light-transmitting resin is 0.05 to 0.15, and the ratio of the light-transmitting fine particles to 100 parts by weight of the light-transmitting resin is small. 5 added
-30 parts by weight, and the surface roughness of the light diffusing resin film is such that the center line average roughness (Ra) is 0.12-0.3.
0 and 10 point average roughness (Rz) 1.0 to 2.9
The present invention relates to an antiglare film represented by the following formula: A second invention relates to an anti-glare film, characterized in that, in addition to the effects of the first invention, the light diffusing resin film is laminated on a transparent substrate. The third invention is
3. The anti-glare film according to claim 1, wherein the thickness of the light-diffusing resin film of the first invention or the second invention is 1 to 3 times the particle diameter of the light-transmitting fine particles. Things. According to a third aspect, in the first or second aspect, the thickness of the light-diffusing resin film is 1 to 3 times the particle size of the light-transmitting fine particles. It is about a film. In a fourth aspect based on the first aspect or the second aspect, the image definition is 80 to 3 pixels.
The present invention relates to an anti-glare film having a reflection preventing property of 5 to 70. A fifth invention relates to the antiglare film according to any one of the first to fourth inventions, wherein the translucent resin is obtained by curing an ionizing radiation curable resin. The sixth invention comprises a non-aggregating light-transmitting fine particle, a light-transmitting resin, and a good solvent and a poor solvent for the light-transmitting resin,
A particle diameter of the light-transmitting fine particles is 1.0 to 5.0 μm, and a difference between a refractive index of light of the light-transmitting fine particles and a refractive index of light of the light-transmitting resin is 0.05 to 0.15; When the compounding amount of each component with respect to 100 parts by weight of the light-transmitting resin is 5%,
Using a coating composition in which the solvent in which the good solvent and the poor solvent are combined is 20 to 1000 parts by weight, and the weight ratio of the good solvent to the poor solvent is 100/20 to 100/70. After coating on the substrate to be coated, drying is performed, and the weight ratio of the good solvent to the light-transmitting resin is reduced, so that the light-transmitting fine particles and the light-transmitting resin are gelled. The present invention relates to a method for producing an antiglare film, which comprises solidifying to form irregularities on the surface of a coating film. A seventh invention relates to a method for producing an antiglare film according to the sixth invention, wherein a translucent resin and a good solvent and a poor solvent selected from the following combinations are used. A combination of an acrylate resin and toluene, methyl ethyl ketone, ethyl acetate, n-butyl acetate or cyclohexanone as a good solvent for the acrylate resin, and methanol, ethanol, n-butanol or isopropanol as a poor solvent, a cellulose resin, and cellulose Ethyl acetate, n-butyl acetate, acetone, or cyclohexanone as a good solvent for the system resin, and methanol, ethanol,
a combination of n-butanol or isopropanol, an epoxy resin, and methanol / toluene (“/” means mixed), ethanol / xylene, methyl ethyl ketone as a good solvent for the epoxy resin;
Ethyl acetate, n-butyl acetate, or methyl isobutyl ketone and a combination of toluene, xylene, cyclohexanone, or cyclopentane as a poor solvent, urea melamine resin, and ethyl acetate, n-butyl acetate, n as a good solvent for the urea melamine resin -Butanol, n-hexyl alcohol, and a combination of toluene or xylene as a poor solvent, or a urethane resin and ethyl acetate, n-butyl acetate, or methyl ethyl ketone as a good solvent for the urethane resin, and methanol or ethanol as a poor solvent Combinations. The eighth invention relates to the method for producing an antiglare film according to the sixth or seventh aspect, wherein drying is performed at a temperature of 20 to 100 ° C. In a ninth aspect, in the sixth to eighth aspects, the light-transmitting resin is an ionizing radiation-curable resin. And a method for producing an antiglare film.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1. An anti-glare film 1 of the present invention basically comprises a light-diffusing resin film 3 laminated on a transparent substrate 2. It has a laminated structure. The light-diffusing resin film 3 contains light-transmitting fine particles 4 inside and has fine irregularities 5 on the surface. The transparent substrate 2 is an object to be applied when the light-diffusing resin film 3 is formed by painting. Therefore, in most cases, the transparent substrate 2 is necessary. According to the casting method, a light-diffusing resin film 3 without the transparent substrate 2 is obtained according to a casting method in which a light-diffusing resin film 3 is formed by applying a base material having a surface to form a light-diffusing resin film 3. You can also.

[0008] The following material constituting the antiglare film of the present invention, material mixing ratio of the surface roughness of the antiglare film, as well as anti-solvent used glare film in the production (good solvent of the invention, the poor solvent ), Drying and the like will be described sequentially.

The non-aggregated light-transmitting fine particles constituting the anti-glare film of the present invention have a very similar refractive index to that of the light-transmitting resin described below. It has transparency, as the particle size of the translucent fine particles,
Those having a range of 1.0 to 5.0 μm are preferred. The particle size is less than 1.0, to do not occur sufficiently light diffusibility be added, and when the particle size exceeds 5.0 .mu.m, image sharpness,
And a sufficient light transmittance cannot be obtained. Specific examples of the non-aggregating light-transmitting fine particles include styrene beads (refractive index; 1.60), melamine beads (refractive index; 1.57), and acryl beads (refractive index; 1.4).
9), acryl - styrene beads (refractive index: 1.5
4), polycarbonate beads, polyethylene beads,
Polyvinyl chloride beads and the like can be used, and among them, styrene beads and acryl-styrene beads are preferable. Also,
Among the non-aggregating light-transmitting fine particles, inorganic materials include SiO ₂ (refractive index: 1.5 to 2.0), Al—Si
O ₂ (refractive index; 1.65), GeO ₂ (refractive index: 1.6
5) can be used, and among them, SiO ₂ is preferable. Since the above light-transmitting fine particles are all non-aggregating, an effective internal scattering property is obtained due to a difference in refractive index from the light-transmitting resin,
This makes it possible to prevent glare.

As the translucent resin, a resin obtained by crosslinking and curing an ionizing radiation-curable resin, a resin obtained by crosslinking and curing an ionizing radiation-curable resin together with a solvent-drying resin, and particularly, a thermoplastic resin is used as a solvent-drying resin. There is a cured product or a cured thermosetting resin.

[0011] Of these, the ionizing radiation-curable resin is mainly an acrylate-based oligomer or prepolymer, or a monofunctional or polyfunctional monomer. As oligomers or prepolymers, relatively low molecular weight polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins,
There are alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and acrylates or methacrylates such as polyhydric alcohols (hereinafter, both are collectively referred to as (meth) acrylate). The following monofunctional monomer or polyfunctional monomer may be added to these ionizing radiation curable resins as a reactive diluent. Monofunctional monomers include ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, and N-pyrrolidone; and polyfunctional monomers include trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, and trimethylolpropane. Propylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, or neopentyl glycol di ( (Meth) acrylates. In addition, these monofunctional monomers or polyfunctional monomers are monomers alone without the oligomer or prepolymer described above,
It can be used for crosslinking and curing, or it can be used in combination with a thermoplastic resin or a thermosetting resin.

As the solvent-drying type resin which may be added to the ionizing radiation-curable resin, for example, a cellulose-based resin such as a nitrocellulose resin, an acetylcellulose resin, a cellulose acetate propionate resin and an ethylhydroxyethylcellulose resin is mainly transparent. It is highly preferred.

The thermosetting resin used as the light-transmitting resin includes phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, amino alkyd resin, urea melamine Resin or silicone resin. When a thermosetting resin is used, a crosslinking agent or a polymerization initiator is added as necessary.

In the antiglare film of the present invention, the difference in the refractive index of light between the light-transmitting fine particles and the light-transmitting resin is 0.05 to 0.1.
Must be 15. The refractive index of the translucent resin is about 1.5 in the case of ionizing radiation-curable resin, but in the case of other resins, if the refractive index of light is low, it is larger than the difference in allowable refractive index. In some cases, the transparency of the light-transmitting fine particles may decrease. In such a case, TiO ₂ (refractive index; 2.3 to
2.7), Y ₂ O ₃ (refractive index; 1.87), La ₂ O ₃ (refractive index; 1.95), ZrO ₂ (refractive index; 2.05), or Al ₂ O ₃ (refractive index) rate; by adding 1.63) or the like, by increasing the refractive index of the translucent resin, it is possible to adjust the difference in refractive index between the translucent particles. This method is effective when inorganic light-transmitting fine particles are used.

The non-aggregating light-transmitting fine particles are made of a light-transmitting resin 10
It is added at a ratio of 5 to 30 parts by weight with respect to 0 parts by weight. If the amount of the non-aggregated light-transmitting fine particles is less than 5 parts by weight, sufficient light diffusing properties cannot be obtained, and thus the resulting antiglare film cannot have sufficient antiglare and antireflection properties. Also, 30
When the amount is more than 10 parts by weight, the light diffusivity is improved, but the haze value (= haze value) is increased, the transmitted image definition is reduced, and the light transmittance (= total light transmittance) is reduced. Occurs.

The antiglare film of the present invention preferably has a surface roughness defined as follows.
That is, the center line average roughness (Ra) is 0.12 to 0.30.
And the 10-point average roughness (Rz) is 1.0 to
2.9. The center line average roughness (Ra) and the 10-point average roughness (Rz) are determined by a method defined by JIS B0601. Here, the center line average roughness (Ra) is 0.12 to 0.30, and the 10-point average roughness (Rz) is 1.0 to 2.9.

In the antiglare film of the present invention, the thickness of the light-diffusing resin film is 1 to 3 times the particle size of the light-transmitting fine particles dispersed therein. The light-diffusing film of the present invention is obtained by the production method of the present invention using a good solvent and a poor solvent, as described later, because irregularities are caused on the surface of the coating film by a drying mechanism during the production. Even if the film thickness clearly exceeds the particle diameter of the fine particles and the fine particles are buried inside the light diffusing resin film, an antiglare film having the above-described surface roughness can be obtained. Here, if the thickness of the light-diffusing resin film is smaller than the particle size of the light-transmitting fine particles dispersed inside, the surface irregularity becomes rough, and the anti-glare property decreases, and conversely, If it exceeds three times, in order to obtain a good surface unevenness, the amount of added fine particles must be increased, and as a result, the haze value increases, and the transmission clearness and the total light transmittance decrease. .

The anti-glare film of the present invention provides a transmission image by defining the particle size of the light-transmitting fine particles, the difference in the refractive index between the light-transmitting fine particles and the light-transmitting resin, the mixing ratio of the two, and the surface roughness. The sharpness is 80 to 300, and the anti-reflection property is 5 to
An excellent performance of 70 can be exhibited. The transmitted image clarity is determined according to JIS K 7105, and the light transmitted or reflected by the sample is measured through a moving optical comb using an image clarity apparatus, and C is the transmitted image clarity (%) and M is the highest. When the wave height and m are the minimum wave height, C =
It is calculated by the formula of (M−m) / (M + m) × 100. The larger the value of the transmitted image sharpness C (%), the clearer and better the image. The equipment used by Suga Test Instruments Co., a clarity meter (ICM-1DP), because the slit width of the optical comb is four, 100% × 4 = 4
00% is the maximum value. The measurement of anti-glare may put a non-shaped surface black adhesive tape to the light diffusing resin film as a sample to prevent reflection of light at the back surface, the sample was held flat, its 5 from 10 ° direction to normal
A parallel light beam of mm square is made incident, and the light beam reflected on the uneven surface of the light diffusing resin film from the specular reflection direction is observed with a CCD camera. The brightness of the peak is set to a certain value by adjusting the aperture of the CCD camera, and the angle of inclination of the brightness at the inflection point of the brightness at the edge portion of the captured light beam is used as the anti-reflection property. When a light beam is projected onto a mirror surface, the inclination of the luminance is almost equal to 90 °, but the inclination of the luminance is small on a mat surface having large irregularities. The “external light reflection” in the evaluation items of the antiglare films of Examples and Comparative Examples described later refers to the anti-reflection property thus obtained.

To produce the anti-glare film of the present invention, non-aggregated light-transmitting fine particles and a light-transmitting resin are blended, and a good solvent and a poor solvent for the light-transmitting resin are used. dispersed or dissolved to prepare a coating composition Te, after performing coating onto the coated substrate is cured by performing drying. In this coating composition, based on 100 parts by weight of the translucent resin,
Solvent (good solvent and poor solvent are collectively referred to as solvent)
It is used at a ratio of 1000 parts by weight, and is blended so that the weight ratio of good solvent / poor solvent in the solvent is 100/20 to 100/70. Here, a good solvent refers to a solvent having excellent resin solubility and swelling degree, and a poor solvent has poor resin solubility,
Although it is a term that refers to a solvent that easily causes gelation, both good solvents and poor solvents are determined for each resin that is a solute,
In addition, since the solubility is excellent or inferior, it is probably also relative, so examples of combinations of a typical translucent resin and a good solvent and a poor solvent for the resin are given; Good solvents include toluene, methyl ethyl ketone, ethyl acetate and n-acetic acid.
Butyl or cyclohexanone, and a combination of methanol, ethanol, n-butanol, or isopropanol as a poor solvent, a cellulose resin,
Ethyl acetate, n-butyl acetate, acetone, or cyclohexanone as a good solvent for the cellulosic resin, and methanol, ethanol, n-
A combination of butanol or isopropanol,
Epoxy resin, methanol / toluene (“/” means mixed), ethanol / xylene, methyl ethyl ketone, ethyl acetate, n-butyl acetate, or methyl isobutyl ketone as a good solvent for the epoxy resin, and toluene as a poor solvent. A combination of xylene, cyclohexanone, or cyclopentane, urea melamine resin, and ethyl acetate, n-butyl acetate, n-butanol, n-
A combination of hexyl alcohol and toluene or xylene as a poor solvent, or a combination of a urethane resin and ethyl acetate, n-butyl acetate, or methyl ethyl ketone as a good solvent for the urethane resin, and methanol or ethanol as a poor solvent. In the above combination, two or more solvents may be selected and used as a good solvent or a poor solvent for the translucent resin.

In this coating composition, the translucent resin 100
The mixing ratio of the solvent is 20 to 1000 parts by weight with respect to parts by weight. For soluble good resin and monomer, the solvent may be used a small amount of, but if the solubility is relatively low, or if dissolved even viscosity is high, to increase the amount of the solvent. If the amount of the solvent is less than the lower limit, the viscosity increases due to slight evaporation of the solvent or gelation occurs, which hinders use in the production, and if the amount exceeds the upper limit, the solvent is dried. It requires a great deal of energy to.

Further, the ratio by weight of the good solvent to the poor solvent in the solvent is preferably from 100/20 to 100/70.
When the coating is performed using a coating composition in which the content of the poor solvent is less than the lower limit, most of the solvent is a good solvent, so the disappearance of the entire solvent is fast, and as a result, it is merely dried,
Unevenness of the coating film surface is unlikely to occur. Further, when the poor solvent is blended in excess of the upper limit, the gelation proceeds from an early stage, so that the resulting irregularities tend to be rough, and the coating composition may gel during storage, and When the drying speed of the solvent is low, the coating film may not be easily dried. The drying speed of the solvent can be based on the relative evaporation speed R of the solvent. The relative evaporation rate R of the solvent A is determined based on the time required for n-butyl acetate to evaporate at room temperature, and R = [time required for evaporating n-butyl acetate] / [solvent A evaporates The larger the value, the faster the evaporation rate, and the smaller the value, the slower the evaporation rate. The relative evaporation rate R of a good solvent and a poor solvent is the relative evaporation rate R of a good solvent.
Is preferably 3.7 or less, and the poor solvent preferably has a relative evaporation rate R of 1.9 or less. When a good solvent and a poor solvent are selected, it is better to select a good solvent having a higher relative evaporation rate R than a poor solvent. The relative evaporation rate R may be smaller in a good solvent than in a poor solvent, depending on the capacity of the dryer after applying the substance.

With respect to 100 parts by weight of the light-transmitting resin in the coating composition, a solvent (a combination of a good solvent and a poor solvent is referred to as a solvent) is used in a proportion of 20 to 1000 parts by weight. when a certain weight part ratio of the poor solvent as 100 / 20-100 / 70, the coating composition has no disadvantages such as gelling during storage, it is possible to maintain a viscosity suitable for application.

When a light diffusing resin film is formed using the above-described coating composition, the material of the substrate to be applied includes transparent glass and transparent resin. There are, or boards. Transparent resins include those in which some or all of the hydroxyl groups of cellulose are mainly esterified with lower fatty acids, such as acetyl cellulose and cellulose acetate butyrate, typically cellulose triacetate. In addition, various polyesters (typically, polyethylene terephthalate = PET), acrylics (typically, polymethyl methacrylate), polyurethane, polycarbonate, polymethylpentene, (meth) acrylonitrile, polyethersulfone, polysulfone, or polyether Ketones and the like can also be used. Of the above,
Using of the transparent resin film, an antiglare film coating is continuously performed, also obtained has a flexibility, since easily adapted to various applications, it is more preferable to use a transparent resin film. The thickness of the transparent resin film is usually 25 to 1000 μm.
By making the surface of the substrate to be applied peelable, the light-diffusing resin film can be peeled off after forming the light-diffusing resin film to form a light-diffusing resin film without the substrate. As described above, due to the relationship between the material of the substrate to be coated and the material of the light-diffusing resin film, the adhesiveness is poor and there is a case where it is not particularly necessary to impart releasability. Alternatively, a method of applying a film on a metal mirror surface or the like to form a film and then peeling the film may be used.

The coating composition can be applied to the substrate to be coated by a general coating or printing technique, and includes a roll coating method, a gravure roll coating method, a spray coating method, a curtain flow coating method, and a pouring method. Kiss coating method, spin coating method using spinner wheeler or the like, or coating method such as brush coating method, or printing method such as gravure printing or silk screen printing.

When drying is performed after coating on the substrate to be coated, irregularities are generated on the surface of the coating film as the drying proceeds. The drying of the coating composition starts when the coating composition is applied on the substrate to be applied by a coating technique or a printing technique. Drying is usually accomplished by blowing and / or heating, under which conditions the solvent evaporates little by little. When the solvent in the coating composition decreases, the translucent resin near the surface, which had been dissolved by the action of the good solvent, begins to gel due to the presence of the poor solvent, and the translucent resin near the coating film surface Lumps composed of translucent fine particles occur. When gelling, the drying rate of the good solvent is higher than that of the poor solvent,
Alternatively, the higher the drying temperature or the greater the amount of air blown, the more the solvent rapidly decreases, the more rapidly the agglomeration of the light-transmitting resin and the light-transmitting fine particles occurs, and relatively large irregularities are formed. The slower the drying rate of the solvent than the poor solvent, or the slower the drying conditions, the slower the rate of solvent reduction in the coating composition, forming relatively fine irregularities. Further, as the amount of the good solvent in the coating composition is smaller, gelation occurs more rapidly and relatively large irregularities are formed. In other words, according to the production method of the present invention, the difference between the drying rate of the good solvent and the drying rate of the poor solvent, the drying conditions, by adjusting the ratio of the good solvent in the solvent, the unevenness formed on the coating film surface Since the size can be controlled and the size of the light-transmitting fine particles does not determine the unevenness of the coating film surface, different sizes of unevenness can be formed even if the same size of light-transmitting fine particles are used. There are advantages that can be done.

The state in which the surface of the coating film is gelled due to irregularities is solidified by continuing drying, or is cured by a method according to the resin component of the coating composition used. If it is a thermosetting resin, it is further heated if necessary, and if an ionizing radiation curable resin is used, it is crosslinked and cured by irradiating it with ionizing radiation.

[0027]

EXAMPLES (Example 1) each of the following materials were blended predetermined amount, may be mixed to prepare a coating composition of the following composition for light diffusion resin film. Transparent resin 100 parts by weight Pentaerythritol triacrylate (Nippon Kayaku Co., Ltd., PET30) Photoinitiator 5 parts by weight (Ciba Geigy, Irgacure 184) Transparent fine particles 8 parts by weight Polystyrene resin filler (particles) Diameter: 1.3 μm, refractive index: 1.6) good solvent 60 parts by weight methyl isobutyl ketone (relative evaporation rate R; 1.6) poor solvent 15 parts by weight isobutyl alcohol (relative evaporation rate R: 0.64) A cellulose triacetate film (manufactured by Fuji Photo Film Co., Ltd., TD-80U, thickness 80 μm) was prepared as a base material, and one side of the film was coated with the coating composition obtained above by a roll coating method. At a temperature of 3 ° C. to form irregularities on the surface of the coating film.
The coating film was cured by irradiation with 20 mJ to obtain an antiglare film.

(Other Examples and Comparative Examples) Example 2
7 and Comparative Examples 1 to 4, the translucent resin and the photoinitiator in Example 1, and the blending amounts thereof were left as they were, and the translucent fine particles and the coating composition in which the solvent was changed were used. The same procedures were performed as in the examples except that the film thickness and the drying temperature were changed each time. In Comparative Example 5, only pentaerythritol triacrylate was applied on a shaping film having a surface with irregularities to a thickness of 3 μm.
m and then cured and peeled off. The changes from Example 1 in each example and each comparative example are described below.
The results are shown in Table 1 and Table 2 below.

[0029]

[Table 1]

[0030]

[Table 2]

The evaluation results of the antiglare films obtained in the above Examples and Comparative Examples are shown in Table 3 below.
And "Table 4". However, in Tables 3 and 4, “face-to-face” refers to a backlight for a liquid crystal display (a LIGHTBOX 45 manufactured by HAKUBA is used).
A color filter with a houndstooth arrangement (or triangular arrangement) and a pitch of 150 μm (to avoid the effect of color, use only a black matrix and use a non-colored filter on each pixel). The standard deviation of luminance variation when the film surface was observed with a CCD camera was obtained by fixing the uneven surface of the antiglare film at a position 160 μm away from the surface of the color filter so as to be on the observation side.

[0032]

[Table 3]

[0033]

[Table 4]

In Example 1 and Example 2, only the drying temperature was different, and the one obtained in Example 1 in which the drying temperature was lower had finer irregularities, so that the surface and the transmission were different. The image sharpness (hereinafter sometimes and abbreviated as sharpness in the table) is good. Moreover, since the surface obtained in Example 2 having a higher drying temperature is rougher, the sharpness is lowered and the haze is slightly increased, but the anti-reflection property is improved. In Example 3,
Since increasing the proportion of the poor solvent than in Example 1,
Although the drying temperature is the same as in Example 1, even when compared with Example 2 in which the temperature is increased, the roughness becomes coarser, the definition becomes lower, and the haze increases. It gets even better. In Example 4, half of the fine particles were added with fine particles having a refractive index of 1.5 close to the resin, so that the haze was reduced and the sharpness was slightly increased.
Since the internal haze is lowered, but in terms of surface glare numerically inferior than Example 1, the value of the surface glare is practically sufficient. In Examples 5 to 7, the particle size of the fine particles and the solvent were changed, but the performance of the obtained antiglare film shows the same good performance as that obtained in Example 1 and the like.

In Comparative Example 1, since only a good solvent was used as the solvent, unevenness was unlikely to occur, and the surface was almost flat.
The surface and the sharpness are good, but the anti-reflection property is not good. In Comparative Example 2, since only the poor solvent was used as the solvent, frosted glass-like rather rough irregularities were generated, the light transmittance was reduced, and the sharpness was extremely low. In Comparative Example 3,
Although the transmittance is high, the sharpness is low and the surface roughness is inferior to that of Example 1. In Comparative Example 4, the sharpness is poor. Surface glare,
It is good in terms of reflection prevention. Comparative Example 5 is different from the examples and other comparative examples in that an irregular shape is formed using a shaping film, and since fine particles are not added, the transmittance and the sharpness are good. It is not good in terms of preventing reflection.

[0036]

According to the first invention, since the translucent resin, the translucent fine particles, and the surface roughness are specified, the antiglare film having such a resin layer has an antiglare property, The transmitted image clarity and light transmittance (= total light transmittance) are high, and excellent performance with high reflection prevention is exhibited. Second
According to the invention, in addition to the effects of the first invention, since with transparency substrate, it is strong, and there is an advantage that easy to handle during their manufacture and processing. According to the third invention, in addition to the effects of the first or second invention, a durable anti-glare film is provided because it has a resin coating film thicker than the particle diameter of the fine particles as compared with the conventional one, and thus has durability. it can. According to the fourth invention,
In addition to the effects of any one of the first to third aspects, the image displayed on the display using the anti-glare film is clear, and the image has sufficient visibility even when used in an environment with external light or illumination. Is obtained. According to the fifth aspect, in addition to the effects of any one of the first to fourth aspects, the ionizing radiation-curable resin composition is formed of a crosslinked and cured resin film, and thus has excellent physical and chemical properties. Film can be provided. According to the sixth aspect, the particle size of the fine particles to be blended is not necessarily limited,
An antiglare film having desired irregularities can be produced by controlling the type, blending ratio, drying temperature and the like of the good solvent and the poor solvent. According to the seventh aspect, in addition to the effects of the sixth aspect,
An antiglare film can be manufactured by selecting a solvent from solvents having a high degree of versatility. According to the eighth invention, in addition to the effects of the sixth or seventh invention, after forming unevenness using an ionizing radiation-curable resin, the resin is cross-linked and cured by irradiation with ionizing radiation, whereby physical and chemical properties are improved. An excellent antiglare film can be stably manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an antiglare film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anti-glare film 2 Transparent base material 3 Light diffusing resin film 4 Translucent fine particles 5 Fine unevenness

Claims (9)

[Claims] 1. A light-diffusing resin film in which non-aggregated light-transmitting fine particles are dispersed in a light-transmitting resin, wherein the light-transmitting fine particles have a particle size of 1.0 to 5.0 μm. The difference between the refractive index of light of the light-transmitting fine particles and the refractive index of light of the light-transmitting resin is 0.05 to 0.15, and the amount of the light-transmitting fine particles added to 100 parts by weight of the light-transmitting resin is 5 to 30 parts by weight, and the surface roughness of the light diffusing resin film is such that the center line average roughness (Ra) is 0.12 to 0.30, and 1
An antiglare film having a zero point average roughness (Rz) of 1.0 to 2.9. 2. The antiglare film according to claim 1, wherein said light diffusing resin film is laminated on a transparent substrate. 3. The antiglare film according to claim 1, wherein the thickness of the light diffusing resin film is 1 to 3 times the particle diameter of the light transmitting fine particles. 4. The anti-glare film according to claim 1, wherein the image clarity is 80 to 300 and the reflection preventing property is 5 to 70. 5. The anti-glare film according to claim 1, wherein the translucent resin is obtained by curing an ionizing radiation curable resin. 6. A non-aggregating light-transmitting fine particle, a light-transmitting resin,
And a good solvent and a poor solvent for the translucent resin, wherein the particle size of the translucent fine particles is 1.0 to 5.0 μm.
m, the difference between the refractive index of light of the light-transmitting fine particles and the refractive index of light of the light-transmitting resin is 0.05 to 0.15, and the compounding amount of each component with respect to 100 parts by weight of the light-transmitting resin is 5 to 30 parts by weight of the light-transmitting fine particles, 20 to 1000 parts by weight of the combined solvent of the good solvent and the poor solvent, and 100/20 to 100 parts by weight of the good solvent and the poor solvent.
/ With 70 a is coating compositions, after performing coating on base material to be coated, subjected to drying by the weight ratio of the good solvent for the transparent resin is reduced, the translucent particles and magnetic A method for producing an antiglare film, comprising: solidifying a light resin while gelling the same to form irregularities on a coating film surface. 7. The method for producing an antiglare film according to claim 6, wherein a translucent resin and a good solvent and a poor solvent selected from the following combinations are used; Combination of toluene, methyl ethyl ketone, ethyl acetate, n-butyl acetate, or cyclohexanone as a good solvent for acrylate resin and methanol, ethanol, n-butanol, or isopropanol as a poor solvent, as a good solvent for cellulose resin and cellulose resin Ethyl acetate, n-butyl acetate, acetone, or cyclohexanone, and a combination of methanol, ethanol, n-butanol, or isopropanol as a poor solvent; an epoxy resin; Ruene (“/” means mixed), ethanol / xylene, methyl ethyl ketone, ethyl acetate, n-butyl acetate, or methyl isobutyl ketone, and a combination of toluene, xylene, cyclohexanone, or cyclopentane as a poor solvent, urea melamine Resin, as a good solvent for urea melamine resin, ethyl acetate, n-butyl acetate, n-butanol,
A combination of n-hexyl alcohol and toluene or xylene as a poor solvent, or a combination of a urethane resin and ethyl acetate, n-butyl acetate or methyl ethyl ketone as a good solvent for the urethane resin, and methanol or ethanol as a poor solvent. 8. The method for producing an antiglare film according to claim 6, wherein the drying is performed at a temperature of 20 to 100 ° C. Wherein said translucent resin is ionizing radiation-curable resin, after causing irregularities on the surface of the coating film was irradiated with ionizing radiation, and wherein the cross-linking curing the coating film according Item 10. The method for producing an antiglare film according to any one of Items 6 to 8.