JP2018031979A - Production method of antiglare film - Google Patents

Abstract

A new production method capable of producing an antiglare film by a coating method is provided.
A first step of coating a thermoplastic resin film with a coating liquid having a liquid temperature T containing an organic solvent A, an organic solvent B, and a solute, and forming a layer of the coating liquid; The liquid layer includes a second step in which the liquid layer is exposed to an atmosphere having a dew point temperature Tr and a relative humidity R, and a third step in which the coating liquid layer is dried in this order. The solubility C _A of the organic solvent A in water at 20 ° C., the solubility C _B of the organic solvent B in water at 20 ° C., the evaporation rate V _A of the organic solvent A with a butyl acetate evaporation rate of 1, and the butyl acetate The evaporation rate V _B , the liquid temperature T, the dew point temperature Tr, and the relative humidity R of the organic solvent B with an evaporation rate of 1 satisfy a predetermined relationship.
[Selection figure] None

Description

  The present invention relates to a method for producing an antiglare film.

  A method for producing a coated film by coating a coating solution on a thermoplastic resin film has been conventionally known. In this production method, a coating liquid is usually applied onto a thermoplastic resin film to form a coating liquid layer. Then, this coating liquid layer is dried to obtain a coating film including a thermoplastic resin film and a coating layer (see Patent Document 1).

JP 2002-326049 A

  An anti-glare film is arranged on the screen of a display device such as a liquid crystal display (LCD) or an organic electroluminescence display (organic EL display) in order to suppress a decrease in contrast and reflection of an image due to external light reflection. Sometimes. Such an antiglare film is an optical film having a high haze.

  This inventor tried to manufacture such an anti-glare film as a coating film. An anti-glare film can be manufactured, for example, by providing a coating layer containing metal particles. In the coating layer containing metal particles, since the metal particles reflect light, the haze increases and an antiglare action is obtained. However, in the coating layer containing metal particles, there is a possibility that the metal particles fall off.

  The antiglare film can be produced by subjecting the surface of the coating layer to processing such as sandblasting or etching. By the processing, a concavo-convex structure is provided on the surface of the coating layer, and light is refracted or reflected by the concavo-convex structure, so that the haze increases and an antiglare action is obtained. However, the processing as described above increases the number of steps required for film production, which can cause an increase in cost.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a new manufacturing method capable of manufacturing an antiglare film by a coating method.

The inventor has intensively studied to solve the above problems. As a result, the present inventors combined a plurality of organic solvents having different solubility in water and satisfying a predetermined relationship as the solvent of the coating liquid, and adjusting the liquid temperature at the time of coating the coating liquid Furthermore, after controlling the dew point temperature and humidity of the atmosphere until coating after coating of the coating liquid, it was found that an antiglare film can be easily produced using the coating method, and the present invention has been completed. .
That is, the present invention includes the following.

[1] A first step of coating a thermoplastic resin film with a coating liquid having a liquid temperature T containing an organic solvent A, an organic solvent B, and a solute, and forming a layer of the coating liquid;
A second step in which the coating liquid layer is exposed to an atmosphere of dew point temperature Tr and relative humidity R;
A third step of drying the coating liquid layer, in this order, and a method for producing an antiglare film,
Solubility C _{A of} the organic solvent A in water at 20 ° C.,
Solubility C _{B of} the organic solvent B in water at 20 ° C.,
The evaporation rate V _{A of} the organic solvent A with the evaporation rate of butyl acetate being 1,
The evaporation rate V _{B of} the organic solvent B with an evaporation rate of butyl acetate as 1,
The liquid temperature T,
The dew point temperature Tr, and
The relative humidity R is represented by the following formulas (1) to (4):
C _A > C _B (1)
1.5 <V _A −V _B (2)
0 ° C <T-Tr <12 ° C (3)
40% <R (4)
The manufacturing method of the anti-glare film which satisfy | fills.
[2] The solubility C _A is 50 g / L or more,
The solubility C _B is less than 50 g / L, (1) method for producing an antiglare film according.
[3] One of the organic solvent A and the organic solvent B is a poor solvent for the thermoplastic resin film,
The method for producing an antiglare film according to [1] or [2], wherein the other of the organic solvent A and the organic solvent B is a good solvent for the thermoplastic resin film.
[4] The method for producing an antiglare film according to any one of [1] to [3], wherein the thermoplastic resin film contains a cycloolefin polymer.

  ADVANTAGE OF THE INVENTION According to this invention, the new manufacturing method which can manufacture an anti-glare film with a coating method can be provided.

  Hereinafter, the present invention will be described in detail with reference to examples and embodiments, but the present invention is not limited to the examples and embodiments shown below, and the claims of the present invention and the equivalent scope thereof Any change can be made without departing from the scope of the invention.

  In the following description, the term “(meth) acryl” encompasses both acrylic and methacryl, the term “(meth) acrylonitrile” encompasses both acrylonitrile and methacrylonitrile, and the term “(meth) acrylate” Includes both acrylates and methacrylates.

[1. Outline of Embodiment of Manufacturing Method of Antiglare Film]
The method for producing an antiglare film according to one embodiment of the present invention comprises applying a coating liquid having a liquid temperature T containing an organic solvent A, an organic solvent B, and a solute to a thermoplastic resin film, and then applying the coating liquid. A second step in which the coating solution layer is exposed to an atmosphere having a dew point temperature Tr and a relative humidity R; and a third step in which the coating solution layer is dried. Including.

[2. Coating liquid]
In the manufacturing method of the anti-glare film which concerns on one Embodiment of this invention, after preparing a coating liquid, the 1st process of coating the coating liquid on a thermoplastic resin film is performed. A coating liquid contains the organic solvent A, the organic solvent B, and a solute, and may contain arbitrary components as needed. Here, the solute is a component other than the organic solvent A and the organic solvent B contained in the coating liquid, and is dissolved in the organic solvent A and the organic solvent B in the coating liquid, and depending on drying in the third step. A component that is not removed.

[2.1. solvent〕
A coating liquid contains the organic solvent A and the organic solvent B in combination as a solvent. The combination of these organic solvent A and organic solvent B includes an organic solvent A having a relatively high solubility C _A in water at 20 ° C. and an organic solvent _B having a relatively low solubility C _B in water at 20 ° C. It is a combination.

Specifically, the solubility C _A of the organic solvent A in water at 20 ° C. and the solubility C _B of the organic solvent B in water at 20 ° C. satisfy the following formula (1).
C _A > C _B (1)

The range of the difference C _A -C _B between the solubility C _A of the organic solvent _A and the solubility C _B of the organic solvent B is preferably greater than 0, more preferably greater than 100 g / L, particularly preferably greater than 250 g / L. , Preferably 1200 g / L or less, more preferably 1100 g / L or less, particularly preferably 1000 g / L or less. When the solubility difference C _A -C _B is larger than the lower limit value of the range, the haze in the coating layer can be increased and an antiglare action can be obtained. Moreover, since the solubility difference C _A -C _B is equal to or less than the upper limit of the above range, the compatibility between the organic solvent A and the organic solvent B can be easily improved, so that the uniformity of the composition of the coating layer is facilitated. Can be increased.

The specific range of the solubility C _A of the organic solvent A is preferably 50 g / L or more, more preferably 100 g / L or more, particularly preferably 200 g / L or more, preferably 1300 g / L or less, more preferably 1200 g. / L or less, particularly preferably 1100 g / L or less. Solubility C _A of the organic solvent A is, by the range at least as large as the lower limit, it is possible to effectively increase the haze of the coating layer, to obtain a sufficient anti-glare effect. Further, the solubility C _A of the organic solvent A is, by it is not more than the upper limit of the range, because it is easy enhanced compatibility with organic solvent A and organic solvent B, a readily enhance the uniformity of the composition of the coating layer be able to.

The specific range of the solubility C _B of the organic solvent B is preferably 0.1 g / L or more, more preferably 0.5 g / L or more, particularly preferably 5 g / L or more, preferably less than 50 g / L, More preferably, it is less than 40 g / L, Most preferably, it is less than 30 g / L. Solubility C _B of the organic solvent B is, by the range at least as large as the lower limit of, because it is easy enhanced compatibility with organic solvent A and organic solvent B, can be enhanced easily uniformity of the composition of the coating layer it can. Further, the solubility C _B of the organic solvent B, a by less than the upper limit of the range, it is possible to effectively increase the haze of the coating layer, to obtain a sufficient anti-glare effect.

  The measured value is usually used as the solubility value of the organic solvent. However, when the solubility value is known, the known value may be adopted. For example, when the solubility value of a certain organic solvent is described in the literature, the literature value may be adopted. For example, when the solubility value of a certain organic solvent is described in a database such as PHYSPPROP Database, the value described in the database may be adopted.

Furthermore, the combination of the organic solvent A and the organic solvent B is a combination of the organic solvent A having a relatively high evaporation rate and the organic solvent B having a relatively low evaporation rate. Specifically, the evaporation speed V _A of the organic solvent A is taken as 1 the evaporation rate of butyl _acetate, and the evaporation rate V _B of the organic solvent B which has a 1 the evaporation rate of butyl acetate, the following equation (2) Fulfill. Here, the evaporation rate V _A of the organic solvent _A is not the evaporation rate in the state of being mixed with the organic solvent B, but represents the evaporation rate measured in the state of the organic solvent A alone. Further, the evaporation rate V _B of the organic solvent _B represents not the evaporation rate in the state of being mixed with the organic solvent A but the evaporation rate measured in the state of the organic solvent B alone.
1.5 <V _A −V _B (2)

The range of the difference V _A −V _B between the evaporation rate V _A and the evaporation rate V _B is usually larger than 1.5, preferably larger than 1.6, more preferably larger than 1.7, preferably 4 Hereinafter, it is more preferably 3.9 or less, particularly preferably 3.8 or less. When the evaporation rate difference V _A −V _B is equal to or greater than the lower limit of the range, the haze in the coating layer can be increased and an antiglare effect can be obtained. Further, the evaporation speed difference V _A -V _B is, by it is not more than the upper limit of the above range, it is easy to obtain organic solvent A and organic solvent B.

The specific range of the evaporation rate V _A of the organic solvent A with the evaporation rate of butyl acetate being 1 is preferably 1.5 or more, more preferably 1.7 or more, particularly preferably 2 or more, preferably 6 Hereinafter, it is more preferably 5.9 or less, particularly preferably 5.8 or less. Evaporation rate V _A of the organic solvent A is, by the range at least as large as the lower limit, it is possible to effectively increase the haze of the coating layer, to obtain a sufficient anti-glare effect. The evaporation rate V _A of the organic solvent A is, by it is not more than the upper limit of the range, it is possible to suppress the disturbance of the liquid surface due to solvent volatilization, it is possible to enhance the uniformity of the thickness of the coating layer.

The specific range of the evaporation rate V _B of the organic solvent B with the evaporation rate of butyl acetate being 1 is preferably 1.8 or more, more preferably 1.9 or more, particularly preferably 2 or more, preferably 3 .8 or less, more preferably 3.7 or less, and particularly preferably 3.6 or less. Evaporation speed V _B of the organic solvent B is, by the range at least as large as the lower limit of, it is possible to perform smoothly the removal of the solvent, it is possible to enhance the productivity of the antiglare film. Further, the evaporation speed V _B of the organic solvent B, a by it is not more than the upper limit of the range, it is possible to effectively increase the haze of the coating layer, to obtain a sufficient anti-glare effect.

  The evaporation rate of the organic solvent is determined according to ASTM D 3539-87 Standard Test Methods for. Evaporation Rates of Volatiles Liquids by Shell Thin-Film Evaporometer. Can be measured according to

  Examples of the solvent that can be used as the organic solvent A and the organic solvent B include ketone solvents such as cyclopentanone, cyclohexanone, methyl ethyl ketone, and acetone; alcohol solvents such as ethanol, methanol, 1-propanol, and 2-propanol; cyclohexane, hexane, Hydrocarbon solvents such as methylcyclohexane and ethylcyclohexane; Acetic ester solvents such as ethyl acetate, butyl acetate, amyl acetate, propyl acetate and isopropyl acetate; Aromatic hydrocarbon solvents such as toluene, xylene, chlorobenzene and 1,2-dichlorobenzene Halogenated hydrocarbon solvents such as chloroform, dichloromethane and 1,2-dichloroethane; ether solvents such as 1,4-dioxane, cyclopentylmethyl ether, tetrahydrofuran and tetrahydropyran; And the like.

  Table 1 below shows the solubility in water at 20 ° C. and the evaporation rate when the evaporation rate of butyl acetate is 1 for typical organic solvents.

  At least one of the organic solvent A and the organic solvent B is preferably a poor solvent for the thermoplastic resin film. Thereby, the breakage of the thermoplastic resin film due to the application of the coating liquid can be suppressed. Here, the poor solvent for the thermoplastic resin film refers to a solvent that hardly dissolves the resin contained in the outermost layer on the side on which the coating solution of the thermoplastic resin film is applied. The solvent in which the resin is difficult to dissolve refers to a solvent having an insoluble content of 0.5% by weight or more when 0.5 g of the resin is dissolved in 100 g of solvent at 25 ° C. On the other hand, the good solvent for the thermoplastic resin film refers to a solvent that easily dissolves the resin contained in the outermost layer on the side on which the coating solution of the thermoplastic resin film is applied. The solvent in which the resin is easily dissolved refers to a solvent having an insoluble content of less than 0.5% by weight when 0.5 g of the resin is dissolved in 100 g of solvent at 25 ° C.

  As a combination of the organic solvent A and the organic solvent B, one of the organic solvent A and the organic solvent B is a poor solvent for the thermoplastic resin film, and the other of the organic solvent A and the organic solvent B is a thermoplastic resin film. A combination that is a good solvent for is preferred. According to this combination, the orientation of the polymer in the thermoplastic resin contained in the film is relaxed by the good solvent in the vicinity of the surface coated with the coating liquid. As a result, the degree of entanglement of the polymer molecules is increased and the toughness of the resin is increased, so that it is difficult to cause the coating layer to peel off due to breakage of the thermoplastic resin film. Therefore, the adhesive force between the thermoplastic resin film and the coating layer can be increased, and is particularly effective when the thermoplastic resin film is a stretched film.

  For example, when a resin film containing a cycloolefin polymer is used as the thermoplastic resin film, examples of the good solvent include cyclopentanone, cyclohexanone, cyclohexane, hexane, methylcyclohexane, toluene, xylene, chlorobenzene, 1, 2 -Dichlorobenzene, chloroform, dichloromethane, 1,2-dichloroethane, 1,4-dioxane, cyclopentylmethyl ether, tetrahydrofuran, and tetrahydropyran. In addition, examples of the poor solvent include methyl ethyl ketone, acetone, ethanol, methanol, 1-propanol, 2-propanol, ethyl acetate, butyl acetate, amyl acetate, propyl acetate, and isopropyl acetate.

  Specific examples of the combination of the organic solvent A and the organic solvent B include, for example, combinations shown in Table 2 below.

  The weight ratio represented by “weight of organic solvent A / weight of organic solvent B” is preferably 30/70 or more, more preferably 40/60 or more, particularly preferably 50/50 or more, preferably 90 / It is 10 or less, more preferably 85/15 or less, and particularly preferably 75/25 or less. When the weight ratio falls within the above range, the haze in the coating layer can be effectively increased and a sufficient antiglare action can be obtained.

  The ratio of the total amount of the organic solvent A and the organic solvent B to 100% by weight of the coating solution is preferably 50% by weight or more, more preferably 55% by weight or more, particularly preferably 60% by weight or more, preferably 95% by weight. % Or less, more preferably 90% by weight or less, and particularly preferably 85% by weight or less. When the ratio of the total amount of the organic solvent A and the organic solvent B is not less than the lower limit of the above range, the haze in the coating layer can be effectively increased and a sufficient antiglare action can be obtained. Moreover, since the thickness of the layer of the coated coating liquid can be thickened because it is below an upper limit, a thick coating layer can be formed easily.

[2.2. Solute)
As a solute contained in the coating liquid, any material that can be dissolved in the coating liquid can be used. In the method for producing an antiglare film according to this embodiment, the coating layer is usually formed as a layer containing a reaction product such as a solute contained in the coating solution or a polymer thereof. Therefore, it is preferable to set the kind of solute of the coating layer according to the composition of the coating layer provided on the antiglare film.

  Examples of the solute include acrylic compounds. When an acrylic compound is used as the solute, a layer having high hardness can be obtained as the coating layer. Examples of acrylic compounds include (meth) acrylic acid compounds, (meth) acrylic acid ester compounds, (meth) acrylamide compounds, (meth) acrylonitrile compounds, urethane (meth) acrylate compounds, and the like. Specific examples thereof include those described in JP2012-236922A.

  Examples of the solute include additives such as a leveling agent, a polymerization initiator, a surfactant, an ultraviolet absorber, a light stabilizer, and a silane coupling agent.

  A solute may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.

  The concentration of the solute in the coating solution can be arbitrarily set according to the thickness of the coating layer provided on the antiglare film, the kind of the solute, and the like. The specific concentration is preferably 10% by weight or more, more preferably 12% by weight or more, particularly preferably 15% by weight or more, preferably 30% by weight or less, more preferably 27% by weight or less, and particularly preferably 25%. % By weight or less. When the concentration of the solute is equal to or higher than the lower limit value of the range, a coating layer having a desired thickness can be easily formed. When the concentration of the solute is equal to or lower than the upper limit value of the range, the organic solvent A and the organic layer Since the ratio of the solvent B can be relatively increased, the haze in the coating layer can be effectively increased to obtain a sufficient antiglare action.

[2.3. (Optional ingredients)
The coating liquid may further contain an optional component in combination with the organic solvent A, the organic solvent B, and the solute described above. For example, any solvent other than the organic solvent A and the organic solvent B; an insoluble component that does not dissolve in the solvent;

[3. Thermoplastic resin film]
The thermoplastic resin film is a film made of a thermoplastic resin. As the thermoplastic resin, a resin containing a thermoplastic polymer and optional components as required can be used. Examples of the polymer include cycloolefin polymer, cellulose ester, polyvinyl alcohol, polyimide, polycarbonate, polysulfone, polyethersulfone, epoxy polymer, polystyrene, acrylic polymer, methacrylic polymer, polyethylene, polypropylene, and combinations thereof. Is mentioned. Among these, from the viewpoints of transparency, low hygroscopicity, dimensional stability, lightness, and the like, cycloolefin polymers and cellulose esters are preferable, and cycloolefin polymers are more preferable.

  A cycloolefin polymer is a polymer in which the structural unit of the polymer has an alicyclic structure. The cycloolefin polymer is a polymer having an alicyclic structure in the main chain, a polymer having an alicyclic structure in the side chain, a polymer having an alicyclic structure in the main chain and the side chain, and these 2 A mixture of any of the above ratios can be obtained. Among these, from the viewpoint of mechanical strength and heat resistance, a polymer having an alicyclic structure in the main chain is preferable.

  Examples of the alicyclic structure include a saturated alicyclic hydrocarbon (cycloalkane) structure and an unsaturated alicyclic hydrocarbon (cycloalkene, cycloalkyne) structure. Among these, from the viewpoint of mechanical strength and heat resistance, a cycloalkane structure and a cycloalkene structure are preferable, and a cycloalkane structure is particularly preferable.

  The number of carbon atoms constituting the alicyclic structure is preferably 4 or more, more preferably 5 or more, particularly preferably 6 or more, preferably 30 or less, more preferably per alicyclic structure. Is 20 or less, particularly preferably 15 or less. When the number of carbon atoms constituting the alicyclic structure is within this range, the mechanical strength, heat resistance and moldability of the thermoplastic resin film are highly balanced.

  In the cycloolefin polymer, the proportion of the structural unit having an alicyclic structure is preferably 50% by weight or more, more preferably 70% by weight or more, and particularly preferably 90% by weight or more. When the proportion of the structural unit having an alicyclic structure in the cycloolefin polymer is within this range, the transparency and heat resistance of the thermoplastic resin film are improved.

  Specific examples of the cycloolefin polymer include (1) a norbornene polymer, (2) a monocyclic olefin polymer, (3) a cyclic conjugated diene polymer, (4) a vinyl alicyclic hydrocarbon polymer, And hydrogenated products thereof. Among these, norbornene polymers and hydrogenated products thereof are more preferable from the viewpoints of transparency and moldability.

  Examples of the norbornene-based polymer include a ring-opening polymer of a monomer having a norbornene structure and a hydride thereof; an addition polymer of a monomer having a norbornene structure and a hydride thereof. Examples of a ring-opening polymer of a monomer having a norbornene structure include a ring-opening homopolymer of one kind of monomer having a norbornene structure and a ring-opening of two or more kinds of monomers having a norbornene structure. Examples thereof include a copolymer and a ring-opening copolymer of a monomer having a norbornene structure and an arbitrary monomer copolymerizable therewith. Furthermore, examples of the addition polymer of a monomer having a norbornene structure include an addition homopolymer of one kind of monomer having a norbornene structure and an addition copolymer of two or more kinds of monomers having a norbornene structure. And addition copolymers of a monomer having a norbornene structure and an arbitrary monomer copolymerizable therewith. Examples of these polymers include polymers disclosed in Japanese Patent Application Laid-Open No. 2002-321302. Among these, a hydride of a ring-opening polymer of a monomer having a norbornene structure is particularly suitable from the viewpoints of transparency, moldability, heat resistance, low hygroscopicity, dimensional stability and lightness.

  Specific examples of the norbornene-based polymer include “ZEONOR” manufactured by ZEON Corporation; “ARTON” manufactured by JSR Corporation; “TOPAS” manufactured by TOPAS ADVANCED POLYMERS.

  The weight average molecular weight (Mw) of the polymer contained in the thermoplastic resin is preferably 10,000 or more, more preferably 25,000 or more, preferably 100,000 or less, more preferably 80,000 or less, particularly Preferably it is 50,000 or less. When the weight average molecular weight of the polymer is in such a range, the mechanical strength and molding processability of the thermoplastic resin film are highly balanced.

  The molecular weight distribution (weight average molecular weight (Mw) / number average molecular weight (Mn)) of the polymer contained in the thermoplastic resin is preferably 1 or more, more preferably 1.2 or more, preferably 10 or less, more preferably. Is 4 or less, particularly preferably 3.5 or less.

  Here, the weight average molecular weight and number average molecular weight of the polymer are determined by gel permeation chromatography using cyclohexane as a solvent (however, if the sample does not dissolve in cyclohexane, toluene may be used). It can be measured as a value in terms of polyisoprene (when the solvent is toluene, in terms of polystyrene).

  The amount of the polymer in the thermoplastic resin is preferably 70% by weight to 100% by weight, more preferably 80% by weight to 100% by weight.

  The glass transition temperature of the thermoplastic resin is preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and preferably 250 ° C. or lower. A thermoplastic resin having a glass transition temperature in such a range is excellent in durability since the deformation and stress generation during use at high temperatures are suppressed.

  The thermoplastic resin has a resin component (that is, oligomer component) having a molecular weight of 2,000 or less, preferably 5% by weight or less, more preferably 3% by weight or less, and still more preferably 2% by weight or less. When the content of the oligomer component is within the above range, generation of fine convex portions on the surface of the thermoplastic resin film is reduced, thickness variation is reduced, and surface accuracy is improved. The amount of the oligomer component can be reduced by appropriately setting, for example, selection of a polymerization catalyst and a hydrogenation catalyst; reaction conditions such as polymerization and hydrogenation; and temperature conditions in a step of pelletizing a resin as a molding material. Yes. The amount of the oligomer component can be measured by the above-mentioned gel permeation chromatography.

  As the thermoplastic resin film, a single-layer film having only one layer may be used, or a multilayer film having two or more layers may be used. When a thermoplastic resin film is provided with two or more layers, it is preferable that the outermost layer on the side coated with the coating liquid contains a cycloolefin polymer. In general, the surface of a layer made of a resin containing a cycloolefin polymer tends to have poor adhesion to other layers. On the other hand, when a coating solution containing a good solvent is used as one of the organic solvent A and the organic solvent B, the adhesion between the outermost layer made of a resin containing a cycloolefin polymer and the coating layer can be improved. An antiglare film having excellent mechanical strength can be obtained.

  As the thermoplastic resin film, a single film may be used, but a long film is preferably used. “Long film” means a film having a length of 5 times or more with respect to the width, preferably 10 times or more, and specifically wound in a roll shape. A film having a length that can be stored or transported. Although the upper limit of the ratio of the length with respect to the width of a film is not specifically limited, For example, it can be 100,000 times or less. By using a long thermoplastic resin film, roll-to-roll production is possible, and the productivity of the antiglare film can be increased.

  The thickness of the thermoplastic resin film may be arbitrarily set according to the use of the antiglare film, and is preferably 1 μm or more, more preferably 5 μm or more, particularly preferably 10 μm or more, and preferably 1000 μm or less. Preferably it is 300 micrometers or less, Most preferably, it is 100 micrometers or less. A thermoplastic resin film having such a thickness has good productivity, is thin, and can be reduced in weight.

  The thermoplastic resin film can be produced, for example, by molding a thermoplastic resin by an arbitrary film forming method. Examples of the film forming method include a cast forming method, an extrusion forming method, and an inflation forming method. Especially, the melt extrusion method which does not use a solvent can reduce the quantity of a volatile component efficiently, and is preferable from a viewpoint of a global environment viewpoint, a viewpoint of work environment, and a viewpoint of manufacturing efficiency. Examples of the melt extrusion method include an inflation method using a die, and a method using a T die is preferable in terms of excellent productivity and thickness accuracy.

  Moreover, the manufacturing method of a thermoplastic resin film may include the process of extending | stretching the obtained film. Thereby, a stretched film is obtained as a thermoplastic resin film. In such a stretched film, the polymer molecules contained in the film are usually oriented. Thus, the stretched film can have optical properties such as retardation.

  As the stretching process, for example, a uniaxial stretching process in which stretching is performed only in one direction may be performed, or a biaxial stretching process in which stretching is performed in two different directions may be performed. Further, in the biaxial stretching treatment, simultaneous biaxial stretching treatment in which stretching is performed simultaneously in two directions may be performed, and sequential biaxial stretching processing is performed in which stretching is performed in one direction and then stretching in another direction. Also good. Furthermore, the stretching process includes any of a longitudinal stretching process for stretching in the film longitudinal direction, a transverse stretching process for stretching in the film width direction, and an oblique stretching process for stretching in an oblique direction that is neither parallel nor perpendicular to the film width direction. You may carry out and may carry out combining these. Examples of the stretching method include a roll method, a float method, and a tenter method.

[5. First step]
In the manufacturing method of the multilayer film which concerns on one Embodiment of this invention, after preparing a coating liquid and a thermoplastic resin film, the 1st process of coating a coating liquid on a thermoplastic resin film is performed. By applying the coating liquid, the layer of the coating liquid is formed on the thermoplastic resin film.

  In the first step, the liquid temperature T of the coating liquid to be applied is preferably higher than 0 ° C., more preferably higher than 5 ° C., particularly preferably higher than 10 ° C., and preferably lower than 20 ° C., more Preferably it is less than 18 degreeC, Most preferably, it is less than 17 degreeC. When the liquid temperature T of the coating liquid is in the above temperature range, the haze in the coating layer can be effectively increased to obtain a sufficient antiglare action.

  The atmosphere in the first step is preferably adjusted so that the dew point temperature and relative humidity of the atmosphere in the first step are the same as the dew point temperature Tr and relative humidity R of the atmosphere in the second step, respectively. Thereby, sufficient anti-glare action can be obtained stably. Usually, since the first step and the second step are performed in the same room, the dew point temperature of the atmosphere in the first step is adjusted by adjusting the atmosphere in the second step so that the dew point temperature Tr and the relative humidity R are obtained. The relative humidity is also adjusted to the temperature Tr and the relative humidity R.

  There are no restrictions on the coating method, for example, spray coating method, bar coating method, roll coating method, die coating method, inkjet coating method, screen coating method, dip coating method, slot die coating method, letterpress printing method, intaglio printing method, gravure The printing method etc. are mentioned.

[6. Second step]
After the first step, a second step is performed in which the coating liquid layer formed on the thermoplastic resin film is exposed to an atmosphere having a dew point temperature Tr and a relative humidity R.

The dew point temperature Tr of the atmosphere to which the coating liquid layer is exposed in the second step satisfies the formula (3).
0 ° C <T-Tr <12 ° C (3)
More specifically, the difference T-Tr between the liquid temperature T of the coating liquid applied in the first step and the dew point temperature Tr of the atmosphere in the second step is usually greater than 0 ° C and usually less than 12 ° C. Preferably, it is less than 11 degreeC. When the temperature difference T-Tr is in the temperature range, the haze in the coating layer can be increased to obtain an antiglare action.

Further, the relative humidity R of the atmosphere to which the coating liquid layer is exposed in the second step satisfies the formula (4).
40% <R (4)
More specifically, the relative humidity R is usually greater than 40%, preferably greater than 45%, particularly preferably greater than 50%. When the relative humidity R is in the above range, the anti-glare action can be obtained by increasing the haze in the coating layer. From the viewpoint of increasing haze, the relative humidity R is preferably as large as possible. However, from the viewpoint of stably producing by suppressing dew condensation in the production facility, it is preferably 75% or less, more preferably 70% or less, and particularly preferably 65%. % Or less.

  The second step can be performed in at least a part of the period after the first step and before the third step. Especially, it is preferable to perform a 2nd process in the at least one part period continuous from a 1st process. Furthermore, it is particularly preferable that the second step is performed in the entire period after the first step and before the third step. Therefore, for example, when producing an anti-glare film while conveying a long thermoplastic resin film, after the coating apparatus for performing the first step, drying for drying the layer of the coating liquid In the section before the apparatus, it is preferable to adjust the atmosphere of the film transport path so that the dew point temperature Tr and the relative humidity R can be obtained. Thereby, the haze in a coating layer can be enlarged effectively and sufficient anti-glare action can be obtained.

  The time for exposing the coating liquid layer formed on the thermoplastic resin film to an atmosphere having a dew point temperature Tr and a relative humidity R is arbitrary as long as the haze in the coating layer can be increased, preferably 3 seconds or more, More preferably 5 seconds or more, particularly preferably 7 seconds or more, preferably 30 seconds or less, more preferably 27 seconds or less, particularly preferably 25 seconds or less. Since the time for exposing the coating liquid layer to the atmosphere having the dew point temperature Tr and the relative humidity R is equal to or higher than the lower limit of the above range, uniform condensation can be stably generated, so that a remarkable anti-glare effect is obtained. be able to. Moreover, by being below an upper limit, generation | occurrence | production of excessive dew condensation can be suppressed or productivity of an anti-glare film can be improved.

[7. Third step]
After the second step, a third step of drying the coating liquid layer formed on the thermoplastic resin film is performed. By the third step, the organic solvent A, the organic solvent B, and any volatile components are removed from the coating liquid contained in the coating liquid layer, and a coating layer is formed. Thereby, an anti-glare film provided with a thermoplastic resin film and a coating layer is obtained.

  In the third step, the coating liquid layer is usually dried by heating. Heating can be achieved, for example, by exposing the coating liquid layer to a high temperature dry atmosphere. The temperature of the drying atmosphere is usually higher than the liquid temperature T of the coating liquid in the first step. The specific temperature of the drying atmosphere is arbitrary as long as the solvent can be removed, but is preferably 70 ° C. or higher, more preferably 75 ° C. or higher, particularly preferably 80 ° C. or higher, preferably 110 ° C. or lower, More preferably, it is 105 degrees C or less, Most preferably, it is 100 degrees C or less.

[8. Any process]
In addition to the process mentioned above, the manufacturing method of the anti-glare film which concerns on one Embodiment of this invention may further include arbitrary processes.
The method for producing an antiglare film may include, for example, a step of curing the coating layer. Examples thereof will be described below. The coating layer obtained by the third step described above usually contains a solute. When this solute can be polymerized by active energy rays such as ultraviolet rays, a step of irradiating the coating layer with active energy rays may be performed after the third step. By irradiation with active energy rays, the solute is polymerized and the hardness of the coating layer can be increased. Thereby, an anti-glare film having high mechanical strength can be obtained.

  In addition, the method for producing an antiglare film includes, for example, a step of subjecting the antiglare film to a surface treatment, a step of stretching the antiglare film, a coating surface of the antiglare film, or a surface on the opposite side (anticoating surface). ) May include a step of bonding a protective film, a step of slitting the antiglare film, a step of winding up the antiglare film, and the like.

[9. Antiglare film]
By the manufacturing method mentioned above, an anti-glare film provided with a thermoplastic resin film and a coating layer can be obtained. Since the antiglare film has a large haze, it can exhibit an excellent antiglare action. The specific haze of the antiglare film is arbitrary as long as the antiglare action is obtained, but is preferably more than 0.6%, more preferably more than 0.8%, and particularly preferably more than 1.0%. large. The upper limit of the haze may be set according to the use of the antiglare film. For example, the haze of the antiglare film for a display device is preferably less than 20%, more preferably less than 15%, particularly preferably. Less than 10%. Among these, the haze is preferably 2.0% or less from the viewpoint of effectively suppressing glare on the screen.
The haze of the film can be measured using a haze meter (for example, “NDH5000” manufactured by Nippon Denshoku Industries Co., Ltd.).

Moreover, in the anti-glare film manufactured with the manufacturing method mentioned above, it is possible to raise a haze, without using a metal particle. Therefore, it is possible to suppress functional degradation due to the detachment of the metal particles.
Furthermore, the manufacturing method mentioned above can raise the haze of a film by adjusting the atmosphere from the coating in a 1st process to the drying in a 3rd process appropriately, and needs to process a film Therefore, the manufacturing cost can be reduced.

  According to this inventor, it is guessed that the mechanism by which the anti-glare film which has the outstanding anti-glare effect by the manufacturing method mentioned above is obtained is as follows. However, the technical scope of the present invention is not limited by the mechanism described below.

  In the above-described method for producing an antiglare film, the layer of the coating liquid formed on the thermoplastic resin film is usually immediately after the coating liquid is applied to the thermoplastic resin film in the first step. The liquid temperature T before coating is maintained. Thereafter, as time elapses, volatile components such as a solvent are volatilized from the coating liquid layer. Since the vaporization heat is lost due to such volatilization, the temperature of the coating liquid layer is lowered. When the temperature of the coating liquid layer reaches the dew point temperature Tr of the atmosphere in the second step, condensation occurs on the surface of the coating liquid layer.

Here, the coating solution contains a combination of an organic solvent A having a relatively fast evaporation rate V _A and an organic solvent _B having a relatively slow evaporation rate V _B as shown in Formula (2). Therefore, when the solvent is volatilized, a large amount of the organic solvent A and a small amount of the organic solvent B are volatilized from the coating liquid layer. If the dew point temperature Tr of the atmosphere in the second step is significantly lower than the liquid temperature T of the coating liquid, the temperature of the coating liquid layer reaches the dew point temperature Tr after coating the coating liquid. It takes a long time. Then, when the temperature of the coating liquid layer reaches the dew point temperature Tr, a large amount of the organic solvent A is lost from the coating liquid layer, and the organic solvent B is mostly on the surface of the coating liquid layer. It can be considered to occupy.

  However, in the manufacturing method described above, the liquid temperature T of the coating liquid is close to the dew point temperature Tr of the atmosphere in the second step, as shown by the equation (3). Therefore, the time required for the temperature of the layer of the coating liquid to reach the dew point temperature Tr after applying the coating liquid is short. Then, when the temperature of the coating liquid layer reaches the dew point temperature Tr, only a small amount of the organic solvent A is lost from the coating liquid layer. Therefore, the coating liquid layer can contain a sufficiently large amount of the organic solvent A.

When the coating solution layer contains a sufficiently large amount of the organic solvent A, the organic solvent A and the organic solvent B are uniformly mixed and distributed in the in-plane direction on the surface of the coating solution layer. it can. Here, as shown by the formula (1), since the solubility C _A of the organic solvent A in water is larger than the solubility C _{B of the} organic solvent B in water, the affinity of the organic solvent A for water is It is higher than the affinity of B for water. Therefore, dew condensation hardly occurs in the portion where the molecule of the organic solvent B exists, and tends to occur in the portion where the molecule of the organic solvent A exists. Therefore, on the surface of the coating liquid layer, condensation occurs uniformly in the in-plane direction according to the uniform distribution of the organic solvent A.

  Furthermore, the atmosphere in the second step has a high relative humidity R as shown by the equation (4). For this reason, the number and size of condensation occurring as described above can be sufficiently increased. Therefore, in the second step of the manufacturing method described above, a sufficient number and size of dew condensation can be formed on the surface of the coating liquid layer so as to be uniformly distributed in the in-plane direction.

  In general, in a portion where condensation occurs, a large depression is generated on the surface of the coating layer, and a large protrusion is generated around the depression. Therefore, a sufficient number and size of depressions and protrusions are uniformly formed on the surface of the coating layer of the resulting antiglare film. Then, due to the concavo-convex structure including the depressions and protrusions formed in this way, light refraction and reflection are uniformly generated on the surface of the coating layer. As a result, since a large haze can be obtained uniformly in the in-plane direction, an antiglare film having an excellent antiglare effect can be obtained.

  The thickness of the coating layer of the antiglare film can be arbitrarily set according to the use of the antiglare film. Specifically, when showing the range, the thickness of the coating layer is preferably 0.5 μm or more, more preferably 1 μm or more, particularly preferably 1.5 μm or more, preferably 20 μm or less, more preferably 15 μm or less, particularly Preferably it is 10 micrometers or less.

  Examples of the use of the antiglare film include an antiglare film for a display device. When used as such an antiglare film for a display device, the antiglare film preferably has high transparency. Specifically, the total light transmittance of the antiglare film is preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more. The total light transmittance of the antiglare film can be measured in a wavelength range of 380 nm to 780 nm using an ultraviolet / visible spectrometer.

  Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to the following examples, and can be implemented with any modifications without departing from the scope of the claims of the present invention and the equivalents thereof.

  In the following description, “%” and “part” representing amounts are based on weight unless otherwise specified. The following operations were performed in a normal temperature and normal pressure atmosphere unless otherwise specified.

[Evaluation method]
(Measurement method of solvent evaporation rate)
The evaporation rate of the solvent was measured using ASTM D 3539-87 Standard Test Methods for. Evaporation Rates of Volatiles Liquids by Shell Thin-Film Evaporometer. Measured according to By dividing the measured evaporation rate by the evaporation rate of butyl acetate, it was converted to the evaporation rate of the solvent with the evaporation rate of butyl acetate as 1.

(Method for measuring haze of film)
The film was cut into 50 mm x 50 mm square thin film samples at any selected site. Thereafter, the haze of the thin film sample was measured using a haze meter (“NDH5000” manufactured by Nippon Denshoku Industries Co., Ltd.).

[Example 1]
(1-1. Preparation of coating solution)
A mixed solvent containing acetone as the organic solvent A and methylcyclohexane as the organic solvent B (weight ratio: acetone / methylcyclohexane = 70/30) was prepared. Acetone is a poor solvent for the resin contained in the thermoplastic resin film. On the other hand, methylcyclohexane is a good solvent for the resin contained in the thermoplastic resin film.

  62.0 parts of this mixed solvent, 50.0 parts of urethane acrylate oligomer (“UV-7640B” manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) having 6 or more acryloyl groups in one molecule, leveling agent (“GRANDIC PC11 manufactured by DIC Corporation”) -6204L ") 0.2 part and 3.0 parts of a polymerization initiator (" Irgacure 184 "manufactured by BASF) were mixed to prepare a coating solution.

(1-2. Preparation of thermoplastic resin film)
As a thermoplastic resin film, a long transversely stretched film made of a thermoplastic resin containing a cycloolefin polymer (“ZEONOR film” manufactured by Nippon Zeon Co., Ltd., glass transition temperature (Tg) of thermoplastic resin: 126 ° C., thickness: 20 μm, wavelength: In-plane retardation at 590 nm (130 nm) was prepared.

(1-3. Production of antiglare film)
A die coater consisting of a coating liquid stock tank, a gear pump, a liquid feeding tube and a coating die was installed in the coating room. As the coating liquid stock tank and the coating die, those capable of adjusting the temperature by passing water were used. Moreover, the liquid supply tube was installed so that temperature adjustment was possible by water flow in a water flow jacket by covering with a water flow jacket. The stock tank, the coating die, and the water flow jacket were adjusted to flow 22.5 ° C. water so that the liquid temperature T of the coating solution was maintained at 22.5 ° C.

  Moreover, the dew point temperature Tr in the coating chamber was adjusted to 11.7 ° C. by adjusting the temperature and relative humidity in the coating chamber, and the relative humidity R in the coating chamber was adjusted to 52.1%.

  The following steps were performed while continuously conveying the thermoplastic resin film in the longitudinal direction.

  A thermoplastic resin film was supplied to the coating room. And the coating liquid with liquid temperature T = 22.5 degreeC was applied on the thermoplastic resin film using the die coater, and the layer of the coating liquid was formed (1st process).

  Thereafter, the thermoplastic resin film was conveyed toward an oven provided immediately downstream of the coating chamber. At this time, the coating liquid layer was run in the coating chamber for 20 seconds after being applied by the die coater until entering the oven, so that the dew point temperature Tr = 11.7 ° C. and the relative humidity R = 52. Exposed to 1% atmosphere (second step).

  Thereafter, the coating liquid layer was dried for about 2 minutes in an oven at 100 ° C. Thereby, the solvent was removed from the layer of the coating liquid, and the coating layer was formed (third step).

Thereafter, the coating layer was irradiated with ultraviolet rays using an ultraviolet irradiation device (high pressure mercury lamp) under the conditions of an illuminance of 250 mW / cm ² and an integrated light amount of 400 mJ / cm ² . Thereby, the urethane acrylate oligomer contained in the coating layer was polymerized, and the coating layer was cured. The thickness of the coating layer after curing was 3.0 μm.
As described above, an antiglare film comprising a thermoplastic resin film and a coating layer provided on the thermoplastic resin film was obtained. The haze of the obtained antiglare film was measured by the measurement method described above.

[Example 2]
The weight ratio of the organic solvent was changed to acetone / methylcyclohexane = 75/25.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Example 3]
The liquid temperature T of the coating liquid applied on the thermoplastic resin film was changed to 14.5 ° C.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 11.9 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Example 4]
The weight ratio of the organic solvent was changed to acetone / methylcyclohexane = 75/25.
Moreover, the liquid temperature T of the coating liquid coated on a thermoplastic resin film was changed to 14.5 degreeC.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 11.9 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Example 5]
A copolymer having a copolymerization ratio of norbornene and ethylene of 82:18, a glass transition temperature of 180 ° C. and a melt volume rate (MVR) = 1.5 (“TOPAS” manufactured by TOPAS Advanced Polymers) is melt-extruded. The obtained long film was transversely uniaxially stretched to obtain a long transversely stretched film (thickness 20 μm, in-plane retardation 130 nm at a wavelength of 590 nm). This laterally stretched film was used as a thermoplastic resin film.
Moreover, the liquid temperature T of the coating liquid coated on a thermoplastic resin film was changed to 14.5 degreeC.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 11.9 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Example 6]
The kind of the organic solvent B was changed from methylcyclohexane to toluene. Toluene is a good solvent for the resin contained in the thermoplastic resin film.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 16 degreeC.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 11.0 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 1]
The liquid temperature T of the coating liquid applied on the thermoplastic resin film was changed to 22.3 ° C.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.2%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 2]
The weight ratio of the organic solvent was changed to acetone / methylcyclohexane = 75/25.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 22.3 degreeC.
Furthermore, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.2%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 3]
The liquid temperature T of the coating liquid applied on the thermoplastic resin film was changed to 16.2 ° C.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.3%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 4]
The weight ratio of the organic solvent was changed to acetone / methylcyclohexane = 75/25.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 16.2 degreeC.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.3%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 5]
The thermoplastic resin film was changed to a laterally stretched film similar to that used in Example 5.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 16.2 degreeC.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.3%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 6]
No urethane acrylate oligomer was used.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 16.2 degreeC.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 33.3%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 7]
Acetone was used as both organic solvent A and organic solvent B by changing the type of organic solvent B from methylcyclohexane to acetone.
Moreover, the liquid temperature T of the coating liquid applied on a thermoplastic resin film was changed to 16.2 degreeC.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[Comparative Example 8]
The liquid temperature T of the coating liquid applied on the thermoplastic resin film was changed to 22.3 ° C.
Further, the dew point temperature Tr and the relative humidity R in the coating chamber were changed to 5.2 ° C. and 52.9%, respectively.
Except for the above items, the antiglare film was produced and evaluated in the same manner as in Example 1.

[result]
The results of Examples and Comparative Examples described above are shown in Table 3 and Table 4 below. In the following table, the meanings of the abbreviations are as follows.
COP: cycloolefin polymer.
UA: urethane acrylate.
MCH: methylcyclohexane.
V _A : The evaporation rate of the organic solvent A with the evaporation rate of butyl acetate as 1.
V _B : The evaporation rate of the organic solvent B with the evaporation rate of butyl acetate as 1.
T: Liquid temperature of the coating liquid.
Tr: Dew point temperature of the coating room atmosphere.
R: Relative humidity of the coating room atmosphere.
C _A : Solubility of organic solvent A in water at 20 ° C.
C _B : Solubility of organic solvent B in water at 20 ° C.
S _A : The weight ratio of the organic solvent A to the total 100% of the organic solvent A and the organic solvent B.
S _B : Weight ratio of organic solvent B to 100% of organic solvent A and organic solvent B in total.

[Consideration]
All the films obtained in Comparative Examples 1 to 8 have a small haze, and therefore it is difficult to obtain an antiglare action. On the other hand, in Examples 1-6, the anti-glare film which has a big haze was obtained. These antiglare films can exhibit a high antiglare action.

Claims (4)

A first step of coating a thermoplastic resin film with a coating liquid having a liquid temperature T containing an organic solvent A, an organic solvent B and a solute, and forming a layer of the coating liquid;
A second step in which the coating liquid layer is exposed to an atmosphere of dew point temperature Tr and relative humidity R;
A third step of drying the coating liquid layer, in this order, and a method for producing an antiglare film,
Solubility C _{A of} the organic solvent A in water at 20 ° C.,
Solubility C _{B of} the organic solvent B in water at 20 ° C.,
The evaporation rate V _{A of} the organic solvent A with the evaporation rate of butyl acetate being 1,
The evaporation rate V _{B of} the organic solvent B with an evaporation rate of butyl acetate as 1,
The liquid temperature T,
The dew point temperature Tr, and
The relative humidity R is represented by the following formulas (1) to (4):
C _A > C _B (1)
1.5 <V _A −V _B (2)
0 ° C <T-Tr <12 ° C (3)
40% <R (4)
The manufacturing method of the anti-glare film which satisfy | fills. The solubility _{C A} is, is at 50 g / L or more,
The solubility C _B is less than 50 g / L, the method for producing an antiglare film according to claim 1, wherein. One of the organic solvent A and the organic solvent B is a poor solvent for the thermoplastic resin film,
The method for producing an antiglare film according to claim 1 or 2, wherein the other of the organic solvent A and the organic solvent B is a good solvent for the thermoplastic resin film.   The manufacturing method of the anti-glare film as described in any one of Claims 1-3 in which the said thermoplastic resin film contains a cycloolefin polymer.