JP2011008945A - Conductive film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive film excellent in conductivity, transparency, and a Newton ring preventing property.SOLUTION: The conductive film is provided with a transparent conductive film containing, on at least one side of a base material film, (i) a conductive polymer (A) containing polythiophene of a polycation shape and polyanion containing a repeating unit of a specific structure as a principal component, and (ii) aggregated particles (B) of an average particle diameter 10 nm or more and 200 nm or smaller in an amount of 1 mass% or more and 30 mass% or smaller against the mass of the conductive polymer (A), and (iii) a central surface average surface roughness Ra of the surface of the transparent conductive layer is 10 nm or more and 250 nm or smaller.

Description

  The present invention relates to a conductive film. More specifically, the present invention relates to a conductive film suitably used as a transparent electrode such as a liquid crystal display (LCD), a transparent touch panel, an organic electroluminescence element, an inorganic electroluminescence lamp, or an electromagnetic wave shielding material such as a plasma display panel (PDP).

  Conventionally, transparent conductive films have been used as transparent electrodes such as LCDs and transparent touch panels, and electromagnetic shielding materials such as PDPs.

Examples of such transparent conductive films include indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), In _{2 on} at least one surface of a transparent base film such as polyethylene terephthalate (PET) or triacetyl cellulose (TAC). It is well known that an O ₃ and SnO ₂ mixed sintered body (ITO) or the like is provided by a dry process such as vacuum deposition, sputtering, or ion plating. Such a dry process is very excellent in that a high-purity transparent conductive layer can be formed with high accuracy, but the film-forming speed is slow, and since a vacuum is used, energy is also required in terms of time. In particular, there are many losses and low productivity. In addition, the transparent conductive film obtained by such a dry process is used in a web-like continuous processing or punching process, or used in a bent state in a surface processing step, or is bent. Therefore, there is a problem that a crack is generated in the transparent conductive layer and the surface resistance is increased during each process or during storage.

  On the other hand, a transparent conductive layer formed by a method (wet process) of applying a liquid containing a conductive polymer on a transparent substrate film has flexibility in the film itself, and problems such as cracks are unlikely to occur. In addition, the wet process has an advantage of excellent productivity because the manufacturing cost is relatively low and the film forming speed is generally high.

  As the conductive polymer used in such a wet process, polythiophene, polyaniline, polypyrrole, and the like are known. However, the transparent conductive film obtained by using these conductive polymers cannot obtain high conductivity at an early stage of development, and as a result, its use is limited to antistatic uses. In addition, the hue of the transparent conductive layer itself may be a problem.

  Therefore, for the purpose of improving the conductivity of the transparent conductive layer obtained by the wet process, improving the hue, or improving the yield of the conductive polymer, etc., the production method of the conductive polymer has been improved. ing. For example, a conductive polymer (Patent Document 1) composed of poly (3,4-dialkoxythiophene) and polyanion obtained by oxidative polymerization of 3,4-dialkoxythiophene in the presence of a polyanion is, for example, patented By the methods described in Document 2 and Patent Document 3, etc., very low surface resistance is expressed while maintaining high light transmittance.

  When a transparent conductive film using such a conductive polymer is used as a transparent electrode of a touch panel, Newton's ring occurs when the upper electrode and the lower electrode of the touch panel come into contact with each other, and visibility It becomes a problem. This occurs because the surface of the transparent conductive layer is smooth. Therefore, in at least one of the upper electrode and the lower electrode, a Newton ring prevention layer in which fine particles are dispersed in a binder is provided between the transparent base film and the transparent conductive layer to suppress the occurrence of Newton rings. (Patent Document 4).

Japanese Patent Laid-Open No. 1-313521 JP 2002-193972 A JP 2003-286336 A JP 2000-246844 A

  However, in the method described in Patent Document 4, the coating is performed twice in order to form the two layers of the Newton ring prevention layer and the transparent conductive layer, resulting in low productivity and production of the wet process. The merit that it is high is reduced. Moreover, transparency will become low by performing coating twice. Moreover, since a transparent conductive layer is formed on the Newton ring prevention layer which is a comparatively rough surface, electroconductivity will become low.

  This invention is made | formed in view of the said prior art, The place made into the objective is to provide the electroconductive film excellent in electroconductivity, transparency, and Newton ring prevention property with sufficient productivity.

  The present inventor has intensively studied to solve the above problems. As a result, it has been found that a conductive film having a transparent conductive layer containing a conductive polymer and agglomerated particles and having a specific surface property has excellent conductivity, transparency, and Newton's ring prevention properties. The present invention has been reached.

That is, the present invention
(1) On at least one side of the base film,
(I) a conductive polymer (A) containing a polycationic polythiophene containing a repeating unit represented by the following formula (I) as a main component and a polyanion, and (ii) a conductive polymer (A) Aggregated particles (B) having an average particle diameter of 10 nm or more and 200 nm or less, with a mass of 1% by mass to 30% by mass.
Is a conductive film provided with a transparent conductive layer containing as a constituent component,
(Iii) A conductive film having an average surface roughness Ra of 10 nm or more and 250 nm or less on the surface of the transparent conductive layer.

(In formula (I), R ¹ and R ² each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or may be optionally substituted together. Represents an alkylene group having 1 to 12 carbon atoms.)

Furthermore, the present invention provides
(2) The surface resistance is 1Ω / □ or more and 10000Ω / □ or less, the total light transmittance is 60% or more,
(3) haze is less than 10%,
(4) A more excellent conductive film can be obtained by providing at least one of the embodiments in which the anchor coat layer is provided between the base film and the transparent conductive layer.

  ADVANTAGE OF THE INVENTION According to this invention, the electroconductive film excellent in electroconductivity, transparency, and Newton ring prevention property can be provided. Further, the present invention is based on a wet process using a conductive polymer, and it is not necessary to separately form two layers of the Newton ring prevention layer and the transparent conductive layer. Can be provided with good productivity. The conductive film of the present invention can be suitably used as a transparent electrode such as an LCD, a transparent touch panel, an organic electroluminescence element, an inorganic electroluminescence element, or an electromagnetic wave shielding material such as a PDP.

It is a figure which shows an example of sectional drawing of the electroconductive film of this invention.

  First, the conductive film of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional view of the conductive film of the present invention, that is, an example of a layer structure. In FIG. 1, the code | symbol 1 shows a base film, the code | symbol 2 shows a transparent conductive layer, the code | symbol 3 shows the anchor coat layer provided as needed, and the code | symbol 4 shows the hard-coat layer provided as needed. As can be seen from FIG. 1, the conductive film of the present invention has a transparent conductive layer laminated on at least one side of a base film. As long as it has such a configuration, other functional layers such as an anchor coat layer and a hard coat layer may be formed as long as the object of the present invention is not impaired.

The present invention will be described in detail below.
[Conductive film]
The conductive film of the present invention is one in which a transparent conductive layer described later is provided on at least one side of a substrate film described later.
In the conductive film of the present invention, the center surface average surface roughness Ra on the surface of the transparent conductive layer is 10 nm or more and 250 nm or less. Here, Ra is obtained by the following measurement method.

(Measuring method of center surface average surface roughness Ra)
Using a non-contact three-dimensional surface structure analysis microscope (NewView 5022) manufactured by ZYGO, measurement was performed under the conditions of a measurement magnification of 25 times and a measurement area of 283 μm × 213 μm (= 0.0603 mm ² ), and the surface built in the roughness meter The center plane average surface roughness Ra was determined by the following equation using analysis software.

  Zjk is the height on the two-dimensional roughness chart at the j-th and k-th positions in each direction when the measurement method (283 μm) and the direct method (213 μm) are divided into M and N, respectively.

  When Ra is in the above numerical range, it is excellent in Newton's ring prevention properties, and at the same time, is excellent in conductivity and transparency, and in an excellent balance between these. Such a balance is particularly suitable when the conductive film of the present invention is used as a transparent electrode or an electromagnetic wave shielding material. When Ra is too small, transparency and conductivity tend to be excellent, but Newton ring prevention tends to be poor. On the other hand, when Ra is too large, the Newton ring prevention property tends to be excellent, but the transparency and conductivity tend to be inferior. From such a viewpoint, Ra is preferably 50 nm to 200 nm, and more preferably 90 nm to 140 nm.

  In order to achieve the center surface average surface roughness Ra on the surface of the transparent conductive layer as described above, the amount and average particle diameter of the aggregated particles (B) may be set as described below. Ra increases when the blending amount is increased or the average particle size is increased. Moreover, when the thickness of the transparent conductive layer is reduced, Ra tends to increase.

  The conductive film of the present invention preferably has a surface resistance in the range of 1Ω / □ or more and 10000Ω / □ or less. When the surface resistance is in the above numerical range, the conductivity is suitable, and it can be suitably used as a transparent electrode or an electromagnetic shielding material. When the surface resistance is too high, the functions as a transparent electrode and an electromagnetic shielding material tend to be insufficient. On the other hand, the lower the surface resistance, the better, but if it is too low, the cost tends to increase. In addition, the manufacturing process becomes unstable and productivity tends to be lowered. In addition, transparency tends to be low. From such a viewpoint, the surface resistance is more preferably 10Ω / □ or more and 5000Ω / □ or less, and particularly preferably 100Ω / □ or more and 3000Ω / □ or less. Such surface resistance tends to decrease when the thickness of the transparent conductive layer is increased or the amount of the conductive polymer is increased, and can be adjusted as appropriate.

The conductive film of the present invention preferably has a total light transmittance of 60% or more. When the total light transmittance is in the above numerical range, the transparency is good, and the visibility is excellent when used as a transparent electrode of an LCD or a transparent touch panel or an electromagnetic wave shielding material of a PDP. When the total light transmittance is too low, the visibility tends to be inferior. From such a viewpoint, the total light transmittance is more preferably 70% or more, and particularly preferably 85% or more. Such total light transmittance increases the transparency of the base film, reduces the thickness of the transparent conductive layer, decreases the average particle size of the aggregated particles (B) described later, and decreases the blending amount. Then, it tends to be high, and can be adjusted as appropriate by these.
In the present invention, an embodiment in which the above-described surface resistance and total light transmittance are simultaneously satisfied is particularly preferable.

  Furthermore, the conductive film of the present invention preferably has a haze of less than 10%. When the haze is in the above numerical range, transparency is good, and when used as a transparent electrode of an LCD or a transparent touch panel or an electromagnetic wave shielding material of a PDP, the visibility is excellent. When the haze is too high, the visibility tends to be inferior. On the other hand, the haze is preferably as low as possible. However, when it is too low, it tends to be difficult to obtain sufficient conductivity and Newton's ring prevention property, and the practical lower limit is about 0.1%. From such a viewpoint, the haze is more preferably 0.1% or more and less than 6%, further preferably 1% or more and less than 5%, and particularly preferably 2% or more and less than 4%. Such haze tends to decrease when the transparency of the base film is increased, the thickness of the transparent conductive layer is decreased, the average particle size of the aggregated particles (B) is decreased, or the blending amount is decreased. Yes, and can be adjusted accordingly.

[Transparent conductive layer]
The transparent conductive layer in the present invention contains a conductive polymer (A) and aggregated particles (B) as constituent components. In this invention, moderate unevenness | corrugation is formed in the surface of a transparent conductive layer by containing the moderate amount of the aggregated particle (B) which has a moderate particle size in a transparent conductive layer. Such irregularities can suppress the occurrence of Newton rings even when the transparent conductive layers of the conductive films facing each other come into contact with each other on a transparent touch panel or the like.

  The thickness of the transparent conductive layer is preferably 0.01 μm or more and 0.3 μm or less. By setting the thickness within the above numerical range, the Newton ring prevention property, conductivity, and transparency are excellent, and the balance between them can be improved. Moreover, dropping of the aggregated particles (B) can be suppressed. If the thickness is too thin, the conductivity tends to be inferior. In addition, the aggregated particles (B) tend to fall off. On the other hand, if it is too thick, it tends to be inferior in Newton ring prevention and transparency. From such a viewpoint, the thickness is more preferably 0.02 μm or more and 0.25 μm or less, and particularly preferably 0.05 μm or more and 0.15 μm or less.

Hereinafter, each structural component which comprises the transparent conductive layer in this invention is demonstrated.
(Conductive polymer (A))
The conductive polymer (A) in the present invention is called a polycationic polythiophene (hereinafter referred to as poly (3,4-disubstituted thiophene)) containing a repeating unit represented by the following formula (I) as a main component. In some cases) and a polyanion. That is, the conductive polymer (A) is a composite compound of poly (3,4-disubstituted thiophene) and a polyanion. The conductive polymer (A) is used as a dispersion liquid dispersed in water.

In the above formula (I), R ¹ and R ² each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, and a butyl group.
R ¹ and R ² together represent an optionally substituted alkylene group having 1 to 12 carbon atoms. Examples of the alkylene group having 1 to 12 carbon atoms include methylene group, 1,2-ethylene group, 1,2-propylene group, 1,3-propylene group, 2,3-butylene group, 2,3-pentylene group, 1,2-cyclohexylene group and the like can be mentioned. In particular, 1,2-alkylene groups such as a methylene group, 1,2-ethylene group, and 1,2-cyclohexylene group are preferable. Such 1,2-alkylene groups are derived from 1,2-dibromoalkanes obtained by brominating α-olefins such as ethene, propene, hexene, octene, decene, dodecene, and styrene, for example. Can do. Examples of the substituent include an alkyl group having 1 to 12 carbon atoms or a phenyl group. Examples of the alkyl group having 1 to 12 carbon atoms as a substituent include a methyl group, an ethyl group, and a propyl group.

Here, “mainly” means that the content of the unit represented by the formula (I) is preferably 50 to 100 mol%, more preferably 80 to 100 mol% with respect to the entire repeating unit constituting the polythiophene. More preferably, it means 90 to 100 mol%. Examples of the other repeating unit include a repeating unit having no substituents OR ¹ and / or OR ^{2 in} the above formula (I).

  The polythiophene having a repeating unit represented by the above formula (I) exhibits a cationic property. Such cationic polythiophene can be obtained, for example, by oxidative polymerization of a monomer, 3,4-disubstituted thiophene, by the method described in JP-A-01-313521.

  Examples of polyanions include polymeric carboxylic acids and polymeric sulfonic acids. Examples of the polymeric carboxylic acid include polyacrylic acid, polymethacrylic acid, and polymaleic acid. Examples of the polymeric sulfonic acid include polystyrene sulfonic acid and polyvinyl sulfonic acid.

  In addition, the polyanion such as the polymeric carboxylic acid and the polymeric sulfonic acid may be a homopolymer polymerized only from an anionic monomer such as vinyl carboxylic acid or vinyl sulfonic acid. Moreover, the copolymer which consists of multiple types of anionic monomer may be sufficient. Further, it may be a copolymer of an anionic monomer and other monomers copolymerizable with the monomer. Examples of other monomers copolymerizable with the anionic monomer include acrylates and styrene. When the polyanion is a copolymer, it is sufficient that at least one kind of anionic monomer is contained as a copolymer component, and plural kinds of anionic monomers or plural kinds of other copolymerizable monomers are arbitrarily selected. Can be used.

  Among these, as the polyanion, polystyrene sulfonic acid and polystyrene sulfonic acid at least a part of which is a metal salt are particularly preferable. The number average molecular weight of the polyanion is preferably 1,000 to 2,000,000, more preferably 2,000 to 500,000.

The content of the anionic monomer composing the polyanion in the conductive polymer (A) is preferably 0. 1 mol per 1 mol of the repeating unit represented by the above formula (I) of the poly 3,4-disubstituted thiophene. It is 1-20 mol%, More preferably, it is 0.25-10 mol%, Most preferably, it is 0.5-5 mol%.
In the present invention, by using the conductive polymer (A) as described above, the conductivity and transparency of the transparent conductive layer can be made excellent.

(Agglomerated particles (B))
The transparent conductive layer in the present invention contains aggregated particles (B) as a constituent component. Such aggregated particles (B) are aggregates in which primary particles aggregate in the transparent conductive layer to form secondary particles. As the aggregated particles (B), those that have been aggregated in advance may be used, or those that are originally primary particle dispersions form a coating composition for forming a transparent conductive layer. An aggregate may be formed in the process or the process of forming the transparent conductive layer. In the present invention, the transparent conductive layer may have primary particles that do not participate in aggregation, but it is necessary that 60% or more of the primary particles participate in aggregation. is there. The number of primary particles involved in such aggregation is preferably 80% or more.

  The average particle size (average particle size of secondary particles) of the aggregated particles (B) in the present invention is 10 nm or more and 200 nm or less. By setting the average particle size within the above numerical range, the height of the unevenness formed by the aggregated particles (B) on the transparent conductive layer surface becomes moderate, and the average surface roughness Ra of the center plane defined by the present invention is reduced. It becomes easy to set it as an aspect. Moreover, it is excellent in Newton ring prevention property, electroconductivity, and transparency simultaneously. Moreover, dropping off of the aggregated particles (B) from the transparent conductive layer can be suppressed. When the average particle size is too small, irregularities due to the aggregated particles (B) tend not to be formed on the surface of the transparent conductive layer, and the Newton ring prevention property tends to be inferior. On the other hand, when too large, it exists in the tendency to be inferior to transparency and electroconductivity. In addition, the aggregated particles (B) tend to fall off. From such a viewpoint, the average particle size is preferably 20 nm to 150 nm, more preferably 30 nm to 100 nm, and particularly preferably 30 nm to 50 nm. In addition, in the process of forming the transparent conductive layer, when the primary particles form aggregates and become aggregated particles (B), the blended amount of primary particles so that the blended amount of aggregated particles (B) falls within the range described later. Should be selected. Further, the average particle diameter of the primary particles forming the aggregated particles (B) is preferably 2 nm or more and 8 nm or less, and the blending amount is selected as described above, and the average particle diameter is set to the above numerical range. By doing this, it becomes easy for such primary particles to form aggregates, and the average particle diameter of the aggregated particles (B) can be easily set within the numerical range defined by the present invention.

  The blending amount of the aggregated particles (B) is 1% by mass or more and 30% by mass or less with respect to the mass of the conductive polymer (A). By setting the blending amount within the above numerical range, the surface of the transparent conductive layer has an appropriate frequency of unevenness formed by the aggregated particles (B), and the aspect of the center plane average surface roughness Ra defined by the present invention is as follows. Easy to do. Moreover, when primary particles form aggregates in the process of forming the transparent conductive layer to form aggregated particles (B), such aggregates are easily formed. Moreover, it is excellent in Newton ring prevention property, electroconductivity, and transparency simultaneously. When the blending amount is too small, unevenness due to the aggregated particles (B) tends to be sparse on the surface of the transparent conductive layer, and the Newton ring prevention property tends to be poor. On the other hand, when the amount is too large, the unevenness due to the aggregated particles (B) tends to become nectar, and as a result, there is a tendency that there is no difference in height between the protruding portion and the flat portion, and the Newton ring prevention property tends to be inferior. . Moreover, it exists in the tendency which is inferior to transparency and electroconductivity. From such a viewpoint, the blending amount is preferably 2% by mass or more and 25% by mass or less, and more preferably 5% by mass or more and 20% by mass or less with respect to the mass of the conductive polymer (A).

  The kind of aggregated particles (B) in the present invention as described above is not particularly limited, and may be organic aggregated particles or inorganic aggregated particles. Among them, from the viewpoint of excellent dispersibility in the coating composition, or excellent strength of the transparent conductive layer obtained, the organic aggregated particles are preferably those in which primary particles composed of silicone fine particles form aggregates, As the inorganic agglomerated particles, those in which primary particles made of a metal oxide such as silica, titanium oxide, zirconium oxide, zinc oxide, cerium oxide form an agglomerate are preferable. Among these, inorganic agglomerated particles are preferable, and those in which primary particles made of silica form an agglomerate are preferable, and are excellent in transparency.

  The transparent conductive layer in the present invention preferably has an aspect that does not substantially contain particles having an average primary particle size of 1 μm or more (hereinafter sometimes referred to as large particles). Here, “substantially does not contain” means that the content of large particles in the transparent conductive layer is 1% by mass or less, preferably 0.1% by mass or less, more preferably 0.01% by mass or less. Show. Conventionally, those containing such large particles to exhibit Newton's ring prevention properties, and further containing particles having an average primary particle size of less than 1 μm (hereinafter sometimes referred to as small particles). Although there were many, in such an aspect, the small particles aggregated around the large particles, and only inferior transparency could be obtained. Furthermore, in such a case, if the thickness of the transparent conductive layer is reduced to increase transparency, the conductive film will curl, so the thickness of the transparent conductive layer should be reduced to the extent that excellent transparency is obtained. Was virtually impossible. On the other hand, in the present invention, the surface irregularities are formed by the aggregated particles (B) in the transparent conductive layer, and the Newton ring prevention property is exhibited. And this aggregated particle (B) becomes an aspect which exists intensively in the surface layer part of a transparent conductive layer, and there exists only a small amount of aggregated particle (B) in an intermediate part (the primary particle before forming an aggregate is Therefore, even if the thickness of the transparent conductive layer is increased in order to suppress curling, the transparency can be maintained.

(Other components that may be added to the transparent conductive layer)
In order to improve the strength of the transparent conductive layer, an appropriate organic polymer material such as polyester, polyacryl, polyurethane, polyvinyl acetate, and polyvinyl butyral is added as a binder to the transparent conductive layer in the present invention as necessary. can do.

  Moreover, an alkoxysilane can be added to the transparent conductive layer in this invention for the purpose of improving the intensity | strength of a transparent conductive layer as needed. Such alkoxysilanes include methyltriacetoxysilane, dimethyldiacetoxysilane, trimethylacetoxysilane, tetraacetoxysilane, tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetraisobutoxysilane, methyltriethoxysilane, dimethyldiethoxy. Examples thereof include silane, trimethylethoxysilane, and phenyltriethoxysilane.

  The alkoxysilane as described above is present in the transparent conductive layer in the form of a reaction product obtained by hydrolysis and subsequent condensation reaction. A catalyst is used for the purpose of efficiently proceeding such hydrolysis and condensation. It is preferable. As the catalyst, an acidic catalyst or a basic catalyst can be used. As the acidic catalyst, inorganic acids such as hydrochloric acid and nitric acid, and organic acids such as acetic acid, citric acid, propionic acid, oxalic acid and p-toluenesulfonic acid are suitable. As the basic catalyst, organic amine compounds such as ammonia, triethylamine and tripropylamine, and alkali metal compounds such as sodium methoxide, potassium methoxide, potassium ethoxide, sodium hydroxide and potassium hydroxide are suitable.

[Method for forming transparent conductive layer]
The transparent conductive layer in the present invention is formed by applying a coating composition for forming a transparent conductive layer (hereinafter sometimes referred to as a coating composition) on a substrate film and drying.

(Coating composition for forming transparent conductive layer)
The coating composition in the present invention is agglomerated in the process of forming the above-described conductive polymer (A) and aggregated particles (B) (and / or forming a coating composition or forming a transparent conductive layer). Monodispersed particles that may become aggregated particles (B) in the layer may be used.Hereinafter, such monodispersed particles may be referred to as aggregating particles) are dispersed in water.

  Such a coating composition comprises a conductive polymer (A) and aggregated particles (B) (and / or aggregated particles), and other components and / or coatings that may be added to the transparent conductive layer as necessary. Each component such as other components that may be added to the composition can be prepared by mixing under stirring. In addition, the conductive polymer (A) and the aggregated particles (B) (and / or the aggregated particles) are preferably used as a dispersion in which each of them is previously dispersed in water. Becomes uniform.

(Other components that may be added to the coating composition)
If necessary, the coating composition for forming the transparent conductive layer is compatible with water for the purpose of dissolving the binder, improving the wettability of the base film, and adjusting the solid content concentration. Any suitable solvent can be added. Such solvents include alcohols (methanol, ethanol, propanol, isopropanol, etc.), amides (formamide, N, N-dimethylformamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, N-methylpropionamide, etc. And the like are preferred.

  Moreover, a small amount of surfactant can be added to the coating composition for forming the transparent conductive layer in the present invention, if necessary, for the purpose of improving the wettability with respect to the base film. Examples of such surfactants include nonionic surfactants (for example, polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether, sorbitan fatty acid ester, etc.), fluorosurfactants (for example, fluoroalkyl carboxylates, Fluoroalkylbenzene sulfonate, perfluoroalkyl quaternary ammonium, perfluoroalkyl polyoxyethylene ethanol, etc.) are preferred.

(Application method)
The coating composition as described above is applied to at least one side of the base film. As such a coating method, a method known per se can be used. For example, a lip direct method, a comma coater method, a slit reverse method, a die coater method, a gravure roll coater method, a blade coater method, a spray coater method, an air knife coat method, a dip coat method, a bar coater method and the like are preferable.

  When applying the coating composition on the base film, if necessary, it is applied to the surface of the base film for the purpose of improving the coating property and for improving the adhesion between the base film and the transparent conductive layer. Further, physical surface treatment such as corona discharge treatment and plasma discharge treatment can be performed. Moreover, in order to improve the adhesion between the base film and the transparent conductive layer, it is preferable to provide an anchor coat layer described later between the base film and the transparent conductive layer.

(Drying and curing method)
After applying the coating composition, it is dried by heating to form a transparent conductive layer. Such heat drying conditions are preferably 80 to 160 ° C. for 10 to 120 seconds, more preferably 100 to 150 ° C. for 20 to 60 seconds. When a thermosetting resin is used as the binder, the heating and drying conditions are selected so that the thermosetting resin is sufficiently cured. In addition, when a UV curable resin or an EB curable resin is used as a binder, generally, after preliminary drying, ultraviolet irradiation or electron beam irradiation is performed.
Thus, a transparent conductive layer can be formed on the base film.

[Base film]
Although it does not specifically limit as a base film in this invention, (meth) acrylic-type resin, polystyrene, polyvinyl acetate, polyolefin like polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyimide, polyamide, polysulfone, polycarbonate A film made of polyester, a resin partially modified with a functional group such as an amino group, an epoxy group, a hydroxyl group, or a carbonyl group, or triacetyl cellulose (TAC) is preferable.

  Examples of the polyester include polyethylene terephthalate (PET) and polyethylene naphthalate (PEN). The polyester may be copolymerized with a third component of 20 mol% or less, preferably 10 mol% or less, based on the total acid component.

  Among these base films, a base film made of PET, PEN, or a copolymer thereof from the viewpoints of excellent mechanical properties and transparency, few attached foreign matters and internal foreign matters, and relatively low production costs. Is particularly preferred. Although the thickness of a base film is not specifically limited, 500 micrometers or less are preferable. When the thickness is in the above numerical range, it is suitable for use in LCDs, transparent touch panels, PDPs and the like. When the thickness is too thick, the rigidity of the substrate film is too strong, and the resulting conductive film tends to be difficult to handle.

  When using a polyester film as a base film, the aspect which provided the anchor coat layer mentioned later between a base film and a transparent conductive layer is preferable. Such an anchor coat layer can increase the adhesion between the base film and the transparent conductive layer. For example, in a transparent touch panel, the durability of the transparent touch panel can be increased. As will be described later, the anchor coat layer is formed by applying a coating liquid for forming the anchor coat layer (hereinafter sometimes referred to as a coating liquid). Such coating can be carried out at any stage, but it is preferably carried out during the production process of the polyester film, and particularly preferably applied to the polyester film before the orientation crystallization is completed.

  Here, the polyester film before orientation crystallization is completed is an unstretched film, a uniaxially stretched film in which the unstretched film is stretched and oriented in any one of the machine direction and the transverse direction, and the machine direction and the transverse direction. And the like that are low-stretch stretch-oriented in the two directions (biaxially stretched film before being finally re-stretched in the machine direction and the transverse direction to complete orientation crystallization), and the like. Especially, it is preferable to apply | coat the coating liquid for forming an anchor coat layer to an unstretched film or a uniaxially stretched film, and to perform longitudinal stretching and / or horizontal stretching and heat setting as it is.

[Anchor coat layer]
The anchor coat layer in the present invention is not particularly limited as long as it has transparency, but from the viewpoint of improving the adhesion to the transparent conductive layer or increasing the transparency, the polyester resin, the oxazoline group and the poly What contains both the acrylic resin which has an alkylene oxide chain as a structural component is preferable.

(Polyester resin)
Although it does not specifically limit as a polyester resin, The polyester resin obtained from the polybasic acid shown below or its ester formation derivative, and a polyol or its ester formation derivative can be mentioned. Such a polyester resin is particularly preferably soluble or dispersible in water (which may contain some organic solvent).

  Examples of the polybasic acid component of the polyester resin include terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid , Pyromellitic acid, dimer acid, 5-sodium sulfoisophthalic acid and the like. The polyester resin is preferably a copolymerized polyester resin containing two or more of these acid components. The polyester resin may contain an unsaturated polybasic acid component such as maleic acid or itaconic acid, or a hydroxycarboxylic acid component such as p-hydroxybenzoic acid, as long as it is in a slight amount.

  Examples of the polyol component of the polyester resin include ethylene glycol, 1,4-butanediol, diethylene glycol, dipropylene glycol, 1,6-hexanediol, 1,4-cyclohexanedimethanol, xylene glycol, dimethylolpropane, and the like. Examples thereof include poly (ethylene oxide) glycol and poly (tetramethylene oxide) glycol.

(acrylic resin)
Examples of the acrylic resin having an oxazoline group and a polyalkylene oxide chain include acrylic resins containing the following monomers as copolymerization components. Such an acrylic resin is particularly preferably soluble or dispersible in water (which may contain some organic solvent).

  Examples of the monomer having an oxazoline group include 2-vinyl-2-oxazoline, 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-5-methyl-2-oxazoline, 2-isopropenyl-4-methyl-2 -Oxazoline, 2-isopropenyl-5-methyl-2-oxazoline and the like can be mentioned, and one or a mixture of two or more thereof can be used. Among these, 2-isopropenyl-2-oxazoline is preferred because it is easily available industrially. By using such an acrylic resin having an oxazoline group, the cohesive force of the anchor coat layer is improved, and the adhesiveness with the transparent conductive layer is further strengthened. Furthermore, the abrasion resistance with respect to the metal roll in a film forming process or a transparent conductive layer processing process can be provided to the base film surface. Content of the monomer which has an oxazoline group is 2-40 mass% as content in an acrylic resin, Preferably it is 3-35 mass%, More preferably, it is 5-30 mass%. When the content is in the above numerical range, adhesion and scratch resistance are more excellent.

  Examples of the monomer having a polyalkylene oxide chain include those obtained by reacting an ester part of acrylic acid or methacrylic acid with polyalkylene oxide. Examples of the polyalkylene oxide chain include polymethylene oxide, polyethylene oxide, polypropylene oxide, and polybutylene oxide. The number of repeating units of the polyalkylene oxide chain is preferably 3 to 100. By using such an acrylic resin having a polyalkylene oxide chain, in the anchor coat layer, the compatibility between the polyester resin and the acrylic resin becomes better than that of an acrylic resin having no polyacrylene oxide chain, The transparency of the anchor coat layer can be improved. When the number of repeating units of the polyalkylene oxide chain is in the above numerical range, the anchor coat layer is excellent in transparency and adhesiveness with the transparent conductive layer. When the number of repeating units of the polyalkylene oxide chain is smaller than 3, the compatibility with the polyester resin tends to be low, and the transparency of the anchor coat layer tends to be low. On the other hand, when it is larger than 100, the moisture and heat resistance of the anchor coat layer tends to be low, and the adhesiveness with the transparent conductive layer tends to deteriorate under high humidity and high temperature. Content of the monomer which has a polyalkylene oxide chain is 3-40 mass% as content in an acrylic resin, Preferably it is 4-35 mass%, More preferably, it is 5-30 mass%. When the content is in the above numerical range, it is more excellent in transparency and adhesion.

  Examples of other copolymerization components of the acrylic resin include the following monomers. That is, alkyl acrylate, alkyl methacrylate (alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, 2-ethylhexyl, cyclohexyl, etc.) ( Hereinafter, acrylate and methacrylate may be referred to as (meth) acrylate.); Hydroxy group-containing monomers such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate; glycidyl (meth) acrylate, allyl Epoxy group-containing monomers such as glycidyl ether; (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, styrenesulfonic acid and salts thereof (sodium salt, potassium salt, ammonium salt, tertiary salt Amine salt, etc. A monomer having a carboxy group or a salt thereof such as: (meth) acrylamide, N-alkyl (meth) acrylamide, N, N-dialkyl (meth) acrylamide (the alkyl group includes a methyl group, an ethyl group, an n-propyl group, Isopropyl group, n-butyl group, isobutyl group, t-butyl group, 2-ethylhexyl group, cyclohexyl group, etc.), acryloylmorpholine, N-methylol (meth) acrylamide, N-phenyl (meth) acrylamide, etc. Monomers having acid anhydrides such as maleic anhydride and itaconic anhydride; vinyl isocyanate, allyl isocyanate, styrene, vinyl methyl ether, vinyl ethyl ether, vinyl trialkoxysilane, alkyl maleic acid monoester, alkyl fumarate Esters, alkyl itaconic acid monoester, (meth) acrylonitrile, vinylidene chloride, ethylene, propylene, vinyl chloride, vinyl acetate, and butadiene, and the like monomers.

  The content of the polyester resin forming the anchor coat layer in the anchor coat layer is preferably 5 to 95% by mass, particularly preferably 50 to 90% by mass. The content of the acrylic resin having an oxazoline group and a polyalkylene oxide chain forming the anchor coat layer in the anchor coat layer is preferably 5 to 90% by mass, particularly preferably 10 to 50% by mass. When the content ratio of the polyester resin and the acrylic resin is in the above numerical range, the adhesiveness with the transparent conductive layer is excellent. Moreover, it is excellent in transparency. When the content ratio of the polyester resin exceeds 95% by mass, or the content ratio of the acrylic resin having an oxazoline group and a polyalkylene oxide chain is less than 5% by mass, the cohesive force of the anchor coat layer tends to decrease, There exists a tendency for adhesiveness with a transparent conductive layer to become low. Moreover, it tends to be inferior in transparency.

(Other components that may be added to the anchor coat layer)
The anchor coat layer preferably contains an aliphatic wax in an amount of 0.5 to 30% by mass, more preferably 1 to 10% by mass. When the content is in the above numerical range, the slipperiness of the base film and the adhesion between the base film and the anchor coat layer are excellent. When the content is less than 0.5% by mass, the lubricity tends to be low. On the other hand, when it exceeds 30% by mass, the adhesion tends to be low.

  Specific examples of the aliphatic wax that is preferably used include carnauba wax, candelilla wax, rice wax, wood wax, jojoba oil, palm wax, rosin modified wax, olicuric wax, sugar cane wax, esparto wax, bark wax and the like. Animal waxes such as plant wax, beeswax, lanolin, whale wax, shellac wax, mineral waxes such as montan wax, ozokerite, ceresin wax, petroleum waxes such as paraffin wax, microcrystalline wax, petrolactam, Fischer Tropu Synthetic hydrocarbon waxes such as wax, polyethylene wax, polypropylene wax and the like. Of these, carnauba wax, paraffin wax, and polyethylene wax are preferred because of good lubricity. These aliphatic waxes are particularly preferably aqueous dispersions from the viewpoints of environmental problems and ease of handling.

  The anchor coat layer preferably contains 0.1 to 20% by mass of a filler having an average particle size of 0.005 to 0.5 μm. When the content is in the above numerical range, the slipperiness of the base film and the transparency of the anchor coat layer are excellent. When the content is less than 0.1% by mass, the slipperiness tends to be low, and it tends to be difficult to wind it into a roll. On the other hand, when it exceeds 20 mass%, the transparency of the anchor coat layer tends to be low, and it may not be usable for various displays, transparent touch panels and the like.

Specific examples of fillers preferably used include calcium carbonate, magnesium carbonate, calcium oxide, zinc oxide, magnesium oxide, silicon oxide (silica), sodium silicate, aluminum hydroxide, iron oxide, zirconium oxide, barium sulfate, and titanium oxide. , Tin oxide, antimony oxide, carbon black, molybdenum disulfide, etc. and their composite inorganic fine particles, acrylic cross-linked polymers, styrene cross-linked polymers, silicone resins, fluororesins, benzoguanamine resins, phenol resins, nylon resins, Organic fine particles such as polyethylene wax may be mentioned. Among them, a filler whose specific gravity does not exceed 3 is preferable for the purpose of suppressing the precipitation of the water-insoluble solid substance in the aqueous dispersion.
In the anchor coat layer, other resins other than the above components, for example, an antistatic agent, a colorant, a surfactant, an ultraviolet absorber and the like can be added as necessary.

(Anchor coat layer thickness)
The anchor coat layer has a thickness of 0.01 to 0.3 μm, preferably 0.02 to 0.25 μm. When the thickness is too thin, the adhesion with the transparent conductive layer tends to be low. On the other hand, if it is too thick, blocking tends to occur. Further, the transparency of the anchor coat layer tends to be low. In addition, the thickness of an anchor coat layer can be suitably adjusted with the solid content concentration and coating amount of a coating liquid.

[Method of forming anchor coat layer]
(Coating solution for forming anchor coat layer)
The anchor coat layer in the present invention as described above is formed by applying a coating liquid containing each component constituting the anchor coat layer on a base film and drying. Such a coating liquid is preferably used in the form of an aqueous coating liquid such as an aqueous solution, an aqueous dispersion, or an emulsion.

  The solid content concentration of the coating liquid is usually 20% by mass or less, but is particularly preferably 1 to 10% by mass. When the solid content concentration is in the above numerical range, the wettability of the coating liquid with respect to the base film becomes good. Moreover, the appearance of the anchor coat layer is excellent. Moreover, it is excellent in the storage stability of the coating liquid. When solid content concentration is less than 1 mass%, it exists in the tendency for it to be inferior to the wettability with respect to a base film. On the other hand, when it exceeds 20 mass%, the storage stability of the coating liquid tends to be low. Further, the anchor coat layer tends to be inferior in appearance. The coating amount may be such that the thickness of the anchor coat layer is in the above numerical range.

(Application method)
As a coating method for coating the coating liquid, a method known per se can be used. For example, a lip direct method, a comma coater method, a slit reverse method, a die coater method, a gravure roll coater method, a blade coater method, a spray coater method, an air knife coat method, a dip coat method, a bar coater method and the like are preferable. These coating methods may be used alone or in combination. In addition, an anchor coat layer may be formed only on one side of a base film as needed, and may be formed on both surfaces.

  When applying the coating liquid on the base film, if necessary, for the purpose of improving the coatability, and for improving the adhesion with the base film, the surface of the base film is subjected to corona discharge treatment, It is preferable to perform a physical surface treatment such as a plasma discharge treatment or a flame treatment, or to use a chemically inert surfactant together with each component constituting the anchor coat layer. Such a surfactant improves the wettability of the coating liquid for forming the anchor coat layer with respect to the base film, such as polyoxyethylene alkylphenyl ether, polyoxyethylene-fatty acid ester, sorbitan fat. Anionic surfactants and nonionic surfactants such as aliphatic esters, glycerin fatty acid esters, fatty acid metal soaps, alkyl sulfates, alkyl sulfonates, and alkyl sulfosuccinates. It is preferable that 0.1-10 mass% of surfactant is contained on the basis of the mass of the solid content in a coating liquid.

(Drying method)
After applying the coating liquid, the anchor coat layer is formed by heating and drying. As such heat-drying conditions, conditions are selected such that the water in the coating liquid is sufficiently evaporated. As described above, the coating liquid for forming the anchor coat layer is preferably applied to an unstretched film or a uniaxially stretched film and subjected to longitudinal stretching and / or lateral stretching and heat setting as it is.
Thus, an anchor coat layer can be formed on the base film.

  Hereinafter, the present invention will be described in more detail with reference to examples. In addition, evaluation in an Example was performed as follows.

(1) Average particle diameter and aggregation rate of aggregated particles (B) A conductive film is sliced in the cross-sectional direction to form an ultrathin section having a thickness of 100 nm, and a transmission electron microscope (for example, JEM-1200EX manufactured by JEOL Ltd.) is used. The aggregated particles in the transparent conductive layer were observed at a magnification of about 100,000 times. Next, using the photograph obtained from the observation, the equivalent circular area diameter of each aggregated particle was determined by an image analyzer or the like. The measurement was performed on 1000 aggregated particles, and the value obtained by number averaging these was used as the average particle size (unit: nm). Here, the aggregated particles are those in which two or more primary particles are gathered. The primary particles were determined by observing the particles at a high magnification of 100,000 to 1,000,000 times, and determining that the particles were not aggregates as primary particles.
Furthermore, using a transmission electron microscope, the total number of primary particles in the range of 2 × 10 ⁻³ mm ² and the number of primary particles involved in the formation of agglomerated particles at a magnification at which the number of primary particles can be confirmed. Counting was performed, and the value obtained by dividing the number of primary particles involved in the formation of aggregated particles by the total number of primary particles was evaluated as the aggregation rate (unit:%) according to the following criteria.
A: Aggregation rate is 80% or more. O: Aggregation rate is 60% or more and less than 80%. X: Aggregation rate is less than 60%. In the present invention, the type of aggregated particles is identified by SEM-XMA and ICP. Can be performed using quantitative analysis of the above. Moreover, the average particle diameter of primary particles can be calculated | required according to the measuring method of the average particle diameter of the aggregated particle mentioned above by making the magnification of a transmission electron microscope into 100,000-1 million times.

(2) Center plane average surface roughness Ra
Using a non-contact three-dimensional surface structure analysis microscope (NewView 5022) manufactured by ZYGO, measurement was performed under the conditions of a measurement magnification of 25 times and a measurement area of 283 μm × 213 μm (= 0.0603 mm ² ), and the surface built in the roughness meter The center plane average surface roughness Ra was determined by the following equation using analysis software.
Zjk is the height on the two-dimensional roughness chart at the j-th and k-th positions in each direction when the measurement method (283 μm) and the direct method (213 μm) are divided into M and N, respectively.

(3) Thickness of transparent conductive layer and anchor coat layer The thickness (unit: nm or μm) of the transparent conductive layer and anchor coat layer was measured using a reflection spectral film thickness meter (trade name: FE-3000, manufactured by Otsuka Electronics Co., Ltd.). The nk Cauchy dispersion formula is cited as an approximate expression of the chromatic dispersion of a typical refractive index, and is obtained by fitting with the actual measured value of the spectrum.

(4) Total light transmittance and haze Measured with a haze meter HCM-2B manufactured by Suga Test Instruments Co., Ltd. according to JIS K7150. The measurement was carried out at arbitrary five locations of the conductive film, and the average values thereof were defined as the total light transmittance (unit:%) and haze (unit:%).

(5) Surface resistance It measured based on JISK7194 using Mitsubishi Chemical Corporation Lorester MCP-T600. The measurement was carried out at any five locations on the surface of the conductive film on the transparent conductive layer side, and the average value thereof was defined as the surface resistance (unit: Ω / □).

(6) Newton ring prevention property The obtained conductive film is bonded to a glass plate so that the surface of the transparent conductive layer side is on the glass plate side, and further pressed against the glass plate using a rubber roller to generate Newton rings. The state was observed. Observation was carried out visually from the base film side under a three-wavelength fluorescent tube, and was determined according to the following criteria.
A: Newton ring does not occur.
○: Newton ring occurs at the moment of pressing, but disappears within 1 second after releasing the rubber roller.
X: After releasing the rubber roller, it takes 1 second or more for the Newton ring to disappear or does not disappear.

(7) Evaluation of dropout of aggregated particles The transparent conductive layer of the obtained conductive film was rubbed against a glass plate under a load of 250 g / cm, and the subsequent dropout state of aggregated particles was observed with a microscope. Judged by. In addition, the observation with a microscope was implemented about arbitrary 1 area | regions of 1 mm x 1 mm.
○: Agglomerated particles fall off ×: Agglomerated particles do not fall off

[Example 1]
<Preparation of coating liquid for forming anchor coat layer>
Polyester resin: Acid component is composed of 65 mol% of 2,6-naphthalenedicarboxylic acid / 30 mol% of isophthalic acid / 5 mol% of 5-sodium sulfoisophthalic acid, and glycol component is composed of 90 mol% of ethylene glycol / 10 mol% of diethylene glycol. Polyester (glass transition temperature (Tg) = 80 ° C., number average molecular weight 13000) was used.
Such a polyester resin can be obtained by a conventional method, for example, according to the method described in Example 1 of JP-A-6-116487.
Acrylic resin: acrylic (Tg = 50 ° C.) composed of 30% by mole of methyl methacrylate / 2% by mole of 2-isopropenyl-2-oxazoline / 10% by mole of polyethylene oxide (n = 10) methacrylate / 30% by mole of acrylamide Using.
Such an acrylic resin can be obtained by a conventional method, for example, according to the method described in Production Examples 1 to 3 of JP-A-63-37167.
Filler: Composite inorganic fine particles of silica and titania (average particle size 100 nm) were used.
Such a filler can be obtained by a conventional method in accordance with, for example, the methods described in Production Examples and Examples of JP-A-7-2520.
Aliphatic wax: Carnauba wax (manufactured by Chukyo Yushi Co., Ltd., trade name: cellosol 524, solid content concentration 30% by mass) was used.
Surfactant: Polyoxyethylene (n = 7) lauryl ether (manufactured by Sanyo Chemical Co., Ltd., trade name: NAROACTY N-70) was used.

  Each component obtained as described above has a mass ratio in the solid content of the resulting coating liquid of 67 parts polyester resin, 20 parts acrylic resin, 3 parts filler, 5 parts aliphatic wax, and interface. The mixture was mixed using a stirring blade so that the activator was 5 parts, and diluted with ion-exchanged water to prepare a coating liquid (solid content concentration 8% by mass) for forming an anchor coat layer.

<Formation of base film and anchor coat layer>
Molten polyethylene terephthalate ([η] = 0.63 dl / g (25 ° C., orthochlorophenol), Tg = 79 ° C.) was extruded from a die and cooled with a cooling drum by a conventional method to obtain an unstretched film. Subsequently, this unstretched film was stretched 3.4 times in the longitudinal direction to obtain a longitudinally uniaxially stretched film. Then, the coating liquid for forming the anchor coat layer obtained above was uniformly applied on both surfaces of the obtained longitudinally uniaxially stretched film with a roll coater. Next, the film was stretched 3.6 times in the transverse direction at 120 ° C. and heat-set while shrinking 3% in the width direction at 220 ° C. to obtain a base film having a thickness of 188 μm on which an anchor coat layer was formed. The thickness of the anchor coat layer was 0.07 μm.

<Formation of transparent conductive layer>
As the conductive polymer (A), a conductive coating liquid mainly composed of poly (3,4-ethylenedioxythiophene), polystyrene sulfonic acid (number average molecular weight Mn = 150,000), and a silane coupling agent ( Made of Nippon Agfagebalt, trade name: Orgacon S-300, solid content concentration 1.1% by mass), a water dispersion of cohesive silica particles (manufactured by Nissan Chemical, trade name: Snowtex XS, average particle diameter of primary particles) 4-6 nm) is added so that the solid content mass of the aggregated particles (B) is 10% by mass with respect to the solid content mass of the conductive polymer to form a transparent conductive layer. It was created. An anchor coat layer of the base film in which the anchor coat layer obtained above was formed using the Mayer bar so that the thickness of the transparent conductive layer after drying was 0.1 μm using the Mayer bar. It apply | coated on top and dried for 1 minute at 140 degreeC, the transparent conductive layer was formed, and the electroconductive film was obtained. Table 1 shows the properties of the obtained conductive film.

[Example 2, Comparative Examples 1-3]
A conductive film was obtained in the same manner as in Example 1 except that the type of aggregated particles, average particle diameter, and blending amount were as shown in Table 1. Table 1 shows the properties of the obtained conductive film.
As can be seen from Table 1, only when the requirements of the present invention were satisfied, a conductive film having sufficient Newton ring prevention property, conductivity, and transparency was obtained at the same time. These conductive films can be suitably used in transparent touch panel applications.

DESCRIPTION OF SYMBOLS 1 Base film 2 Transparent conductive layer 3 Anchor coat layer 4 Hard coat layer

Claims (4)

On at least one side of the base film,
(I) a conductive polymer (A) containing a polycationic polythiophene containing a repeating unit represented by the following formula (I) as a main component and a polyanion, and (ii) a conductive polymer (A) Aggregated particles (B) having an average particle diameter of 10 nm or more and 200 nm or less, with a mass of 1% by mass to 30% by mass.
Is a conductive film provided with a transparent conductive layer containing as a constituent component,
(Iii) The electroconductive film whose center plane average surface roughness Ra in the surface of a transparent conductive layer is 10 nm or more and 250 nm or less.
(In formula (I), R ¹ and R ² each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or may be optionally substituted together. Represents an alkylene group having 1 to 12 carbon atoms.)   The conductive film according to claim 1, wherein the surface resistance is 1Ω / □ or more and 10,000Ω / □ or less, and the total light transmittance is 60% or more.   The conductive film according to claim 1 or 2, wherein the haze is less than 10%.   The conductive film according to claim 1, wherein an anchor coat layer is provided between the base film and the transparent conductive layer.