JP4660255B2 - Conductive film - Google Patents

Description

  The present invention relates to a conductive film excellent in transparency and conductivity. More specifically, the present invention relates to a transparent conductive film suitable as a transparent electrode for a liquid crystal display (LCD), a transparent touch panel, an organic electroluminescence element, an inorganic electroluminescence lamp, etc., with an improved ratio of surface resistivity and contact resistance. is there.

Conventionally, a transparent conductive film is suitably used as a transparent electrode such as a liquid crystal display or a transparent touch panel or an electromagnetic shielding material. Examples of such transparent conductive films include indium oxide (In ₂ O ₃ ), tin oxide (SnO ₂ ), In ₂ O _{3 on} at least one surface of a transparent film surface such as polyethylene terephthalate (PET) or triacetyl cellulose (TAC). It is well known that a mixed sintered body (ITO) of SnO ₂ and SnO ₂ is provided by a dry process such as vacuum deposition, sputtering, or ion plating.

  However, the transparent conductive film usually has continuous processing and punching processing in a web shape, and is used in a bent state during surface processing and is also stored. In the conductive film, cracks may occur during the processing step or storage, and the surface resistance may increase.

  On the other hand, the transparent conductive coating layer formed by applying a conductive polymer on a transparent substrate film (wet process) has flexibility in the film itself, and problems such as cracks hardly occur. In addition, the method of obtaining a transparent conductive film by applying a conductive polymer has the advantage that the manufacturing cost is relatively low unlike the dry process, and the coating speed is generally high, so that the productivity is excellent. . Transparent conductive films obtained by applying such conductive polymers are charged with polythiophene, polyaniline, polypyrrole, etc., which have been generally used so far, because high conductivity cannot be obtained at the initial stage of development. The use was limited to the prevention use etc., or the hue of the conductive coating layer itself was problematic. However, these problems have recently been improved by improving the production method. For example, a conductive polymer (Patent Document 1) comprising a poly (3,4-dialkoxythiophene) obtained by oxidative polymerization of 3,4-dialkoxythiophene in the presence of a polyanion and a polyanion is a recent production method. (Patent Document 2 and Patent Document 3) improve the surface resistance while maintaining a high light transmittance.

  However, a transparent conductive film having such a conductive polymer as a transparent conductive coating film layer has many polyanion components that do not contribute to conductivity near the surface of the coating film. For example, when used as a base material for a touch panel There are problems such as high contact resistance, which causes erroneous operation. In addition, even when used as a transparent electrode such as an organic electroluminescence element or an inorganic electroluminescence lamp, there is a problem that predetermined conductivity cannot be obtained.

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

  The present invention has been made in view of the above-mentioned background art, and its object is to have excellent transparency and conductivity while using a conductive polymer, and at least as excellent as a laminate of ITO. Another object is to provide a conductive film.

  As a result of diligent investigations to achieve the above-mentioned problems, the present inventors have used a conductive polymer composed of polycationic polythiophene and polyanion and specified the ratio between the surface resistivity and the contact resistance value. For example, it is possible to suppress erroneous operation when used as a base material for a touch panel, for example, and even when used as a transparent electrode such as an organic electroluminescence element or an inorganic electroluminescence lamp, it has been found that desired conductivity can be expressed, The present invention has been reached.

（式中、Ｒ^１およびＲ^２は相互に独立して水素または炭素数１〜４のアルキル基を表すか、あるいは一緒になって任意に置換されてもよい炭素数１〜１２のアルキレン基を表す）で表される繰り返し単位からなるポリカチオン状のポリチオフェンとポリアニオンとからなる導電性高分子を構成成分とする透明導電性塗膜が設けられた導電性フィルムであって、その全光線透過率が７０％以上、表面抵抗率が１０〜１×１０^４Ω／□でかつ接触抵抗値との比が６以下であり、該透明導電性塗膜が、透明導電性塗膜を形成するためのコーティング組成物を塗布する際に、２回以上に分けて塗布して形成された透明導電性塗膜であるか、または、透明導電性塗膜の形成後、コロナ放電処理もしくはプラズマ放電処理が施された透明導電性塗膜であることを特徴とする導電性フィルム。」が提供される。 Thus, according to the present invention, “at least one side of the base film has the following general formula:

(Wherein R ¹ and R ² each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms, or an alkylene group having 1 to 12 carbon atoms which may be optionally substituted together) A conductive film provided with a transparent conductive film comprising a conductive polymer composed of a polycationic polythiophene and a polyanion composed of a repeating unit represented by the following formula, and its total light transmittance: There 70%, surface resistivity Ri ratio 6 der following the 10~1 × 10 ⁴ Ω / □ in and contact resistance, since the transparent conductive coating film, a transparent conductive coating film When the coating composition is applied, it is a transparent conductive coating formed by applying it twice or more, or after the formation of the transparent conductive coating, corona discharge treatment or plasma discharge treatment is performed. transparent conductive coating film der subjected Conductive film, characterized in that. Is provided.

  The conductive film of the present invention is formed by forming a transparent conductive coating film containing a specific polythiophene-based conductive polymer. Since the ratio of the surface resistivity to the contact resistance value is 6 or less, it is equivalent to ITO. It has excellent transparency and conductivity. Therefore, it can be suitably used as a transparent electrode such as a liquid crystal display (LCD) touch panel, an organic electroluminescence element, and an inorganic electroluminescence lamp.

で表される繰り返し単位からなるポリカチオン状のポリチオフェン（以下、“ポリ（３，４−ジ置換チオフェン）”と称することがある）と、ポリアニオンとからなる導電性高分子を構成成分として含有する透明導電性塗膜が形成されている。ここで、上記式中Ｒ^１およびＲ^２は、相互に独立して水素または炭素数が１〜４のアルキル基を表すか、あるいは一緒になって任意に置換されてもよい炭素数が１〜１２のアルキレン基を表す。Ｒ^１およびＲ^２が一緒になって形成される、置換基を有してもよい炭素数が１〜１２のアルキレン基の代表例としては、１，２−アルキレン基（例えば、１，２−シクロヘキシレン、２，３−ブチレンなど）があげられる。この１，２−アルキレン基は、α−オレフィン類（例えば、エテン、プロペン、ヘキセン、オクテン、デセン、ドデセンおよびスチレン）を臭素化して得られる１，２−ジブロモアルカン類から誘導される。Ｒ^１およびＲ^２が一緒になって形成される炭素数が１〜１２のアルキレン基の好適な置換基は、メチレン、１，２−エチレンおよび１，３−プロピレン基であり、１，２−エチレン基が特に好適である。 The conductive film of the present invention has the following general formula on at least one side of the base film.

A conductive polymer composed of a polycationic polythiophene composed of repeating units represented by the formula (hereinafter sometimes referred to as “poly (3,4-disubstituted thiophene)”) and a polyanion is contained as a constituent component. A transparent conductive coating film is formed. Here, R ¹ and R ² in the above formula independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms, or have 1 to 1 carbon atoms that may be optionally substituted together. 12 alkylene groups are represented. As a typical example of the alkylene group having 1 to 12 carbon atoms which may be substituted and formed by R ¹ and R ² together, a 1,2-alkylene group (for example, 1,2- Cyclohexylene, 2,3-butylene, etc.). This 1,2-alkylene group is derived from 1,2-dibromoalkanes obtained by brominating α-olefins (for example, ethene, propene, hexene, octene, decene, dodecene and styrene). Suitable substituents of the alkylene group having 1 to 12 carbon atoms formed by combining R ¹ and R ² are methylene, 1,2-ethylene and 1,3-propylene groups, An ethylene group is particularly preferred.

  On the other hand, the polyanion constituting the conductive polymer includes polymeric carboxylic acids (for example, polyacrylic acid, polymethacrylic acid, polymaleic acid, etc.), and polymeric sulfonic acids (for example, polystyrene sulfonic acid, polyvinyl sulfonic acid, etc.). Etc. These polymeric carboxylic acids and sulfonic acids may also be copolymers of vinyl carboxylic acids and vinyl sulfonic acids with other polymerizable monomers such as acrylates and styrene. Among these polyanions, those in which polystyrene sulfonic acid and all or a part thereof are metal salts are particularly suitable. The number average molecular weight of the polyanion is suitably in the range of 1,000 to 2,000,000, particularly preferably in the range of 2,000 to 500,000.

  The transparent conductive coating film containing the conductive polymer may contain diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, or the like from the viewpoint of improving the conductive performance. Further, a water-soluble compound that is liquid at room temperature having an amide bond in the molecule may be contained.

  These compounds are preferably contained in the range of 10 to 1000 parts by weight, preferably in the range of 30 to 600 parts by weight, with respect to 100 parts by weight of the conductive polymer. When the content is less than 10 parts by weight, the effect of improving the conductive performance is reduced. Conversely, when the content is more than 1000 parts by weight, the haze value of the coating is increased and the transparency is lowered. Since the strength of the film itself is reduced, the film easily peels off, and when the film is wound into a roll, a problem such as easy transfer to the back surface with which the coating film comes into contact easily occurs. Here, “with respect to 100 parts by weight of the conductive polymer” means “with respect to 100 parts by weight of the solid content of the conductive polymer”.

  Next, you may add an alkoxysilane compound to the transparent conductive coating film concerning this invention in order to improve the intensity | strength of the coating film obtained. These silane compounds are present in the coating film in the form of a reaction product obtained by hydrolysis and subsequent condensation reaction. Examples of these silane compounds include tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, tetraisobutoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane, phenyltriethoxysilane, and γ-glycidoxy. Examples include trialkoxysilanes having reactive functional groups other than alkoxy groups such as propyltrimethoxysilane and vinyltriethoxysilane, especially 3-glycidoxypropyltrimethoxysilane and 3-glycidoxypropylmethyl having an epoxy group. Dimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane and the like are preferable.

  The amount of the alkoxysilane compound added is preferably in the range of 20 to 500 parts by weight with respect to 100 parts by weight of the conductive polymer. When the added amount is less than 20 parts by weight, the effect of improving the coating film strength is reduced, while when it exceeds 500 parts by weight, the surface resistivity tends to increase.

  In order to efficiently proceed such hydrolysis / condensation of the silane compound, it is preferable to use a catalyst in combination. As the catalyst, either an acidic catalyst or a basic catalyst can be used. As the acidic catalyst, inorganic acids such as acetic acid, hydrochloric acid and nitric acid, and organic acids such as acetic acid, citric acid, propionic acid, oxalic acid and p-toluenesulfonic acid are suitable. On the other hand, 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.

  In the present invention, as the coating composition for forming the transparent conductive coating film layer, a dispersion liquid in which the conductive polymer as a main component is dispersed in water is used. If necessary, polyester, polyacryl, polyurethane A suitable organic polymer material such as polyvinyl acetate or polyvinyl butyral can be added as a binder.

  Furthermore, if necessary, an appropriate solvent compatible with water can be added for the purpose of dissolving the binder, improving the wettability to the base film, or adjusting the solid content concentration. . For example, alcohols (methanol, ethanol, propanol, isopropanol, etc.), amides (formamide, N, N-dimethylformamide, acetamide, N-methylacetamide, N, N-dimethylacetamide, N-methylpropionamide) and the like are preferable. Used.

  Furthermore, you may add a small amount of surfactant to the said coating composition in order to improve the wettability with respect to a base film. Preferred surfactants include nonionic surfactants (eg, polyoxyethylene alkylphenyl ether, polyoxyethylene alkyl ether, sorbitan fatty acid ester, etc.), and fluorosurfactants (eg, fluoroalkylcarboxylates, Fluoroalkylbenzene sulfonate, perfluoroalkyl quaternary ammonium salt, perfluoroalkyl polyoxyethylene ethanol, etc.).

  The base film in the present invention is not particularly limited, but polyester, polystyrene, polyimide, polyamide, polysulfone, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, and blends and copolymers thereof, and phenol resin and epoxy resin. A film made of ABS resin or the like is preferable.

  Among them, a biaxially oriented polyester film is preferable because it has excellent dimensional stability, mechanical properties, heat resistance, electrical properties, and the like. Particularly, polyethylene terephthalate or polyethylene-2,6-naphthalate has a high Young's modulus. It is more preferable because it has excellent mechanical characteristics such as excellent thermal characteristics such as excellent heat-resistant dimensional stability. The thickness of the base film is not particularly limited, but is preferably 500 μm or less. When it is thicker than 500 μm, the rigidity is too strong, and the handleability when the obtained film is attached to a display or the like tends to be lowered.

Next, the conductive film of the present invention has a total light (visible light) transmittance of 70% or more, preferably 80% or more, and simultaneously has a surface resistivity of 10 to 1 × 10 ⁴ on the transparent conductive coating film side. It is necessary that it is Ω / □, preferably 10 to 5 × 10 ³ Ω / □. When the total light transmittance is less than 70%, the transparency is insufficient, and for example, even if a touch panel is created, it is not preferable because it is too dark to see the display screen. In addition, when the surface resistivity exceeds 1 × 10 ⁴ Ω / □, the surface resistivity is too high, which is not preferable. Conversely, when the surface resistivity is less than 10Ω / □, the amount of the conductive polymer used is remarkably increased. Therefore, the manufacturing cost increases and it is not economical.

  Furthermore, the ratio of the surface resistivity to the contact resistance value (contact resistance value / surface resistivity) needs to be 6.0 or less, preferably 5.0 or less. When this ratio exceeds 6.0, the electrical conductivity becomes insufficient. For example, when it is used as a base material for a touch panel, a problem such as an erroneous operation occurs, and an organic electroluminescent element or inorganic When it is used as a transparent electrode such as an electroluminescence lamp, a problem such as failure to obtain predetermined conductivity occurs, which is not preferable.

  The method for producing the conductive film of the present invention described above is not particularly limited, but when the coating composition for forming the transparent conductive coating layer is applied and dried, the polyanion component is on the surface layer. Because it is easy to migrate, for example, it is applied in two or more times, the polyanion component is removed by corona discharge treatment or plasma discharge treatment after forming the coating film, or the affinity with the polyanion component before applying the coating composition A preferable example is a method in which a component having high properties is previously applied to a base film. In particular, in the method of applying the coating composition twice or more times, the thickness of the polyanionic component layer is proportional to about 2 to 10% of the applied transparent conductive coating layer thickness. In addition, since the polyanion component layer is present on the upper part of the previously applied transparent conductive coating layer, a component having a high affinity with the polyanion component is applied in advance. Thinning is preferable.

  In addition, removal of the polyanion component layer by plasma discharge treatment is one of the preferred methods as in the case of two-time overcoating, as reproducibility and fine control become possible due to recent development of plasma treatment technology.

  As a method for applying the transparent conductive coating layer, a method known per se can be adopted. 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. The heating and drying conditions are preferably 80 to 160 ° C. for 10 to 300 seconds, particularly preferably 100 to 150 ° C. for 20 to 120 seconds.

  When the base film is a polyester film, it is preferable to adopt an in-line coating method during the film forming process, in particular, applying the coating liquid after vertically stretching the unstretched film, and then heat-treating after drying and horizontal stretching. .

  According to such an in-line coating method, for example, the adhesion to the base film is improved compared to the off-line processing, and the film obtained by gripping both ends of the film with a clip at the time of heat treatment does not have wrinkles and is flat. Is effective. In addition, it is preferable to perform the heat processing by an in-line coating method at 200 degreeC or more. In addition, when applying the coating liquid, if necessary, physical surface treatment such as corona discharge treatment or plasma discharge treatment is applied to the substrate film surface as a preliminary treatment for further improving the adhesion and coating properties. May be applied.

  The thickness of the fully transparent conductive coating layer is preferably 60 nm or more, particularly 80 nm or more, and preferably 300 nm or less, particularly 200 nm or less. If the thickness of the coating film is too thin, sufficient conductivity may not be obtained. Conversely, if it is too thick, transparency may be insufficient or blocking may occur.

  As described above, the conductive film of the present invention requires a polythiophene-based transparent conductive coating layer to be laminated on at least one side of the base film, but the side on which the transparent conductive coating layer is formed. A coating film such as an anchor coat layer or a hard coat layer can be provided on the opposite surface to the surface as needed.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. In addition, each evaluation in an Example followed the following method.

(1) Thickness of Transparent Conductive Coating Layer An ultra-thin film slice is cut out of a conductive film perpendicularly to the film surface using a microtome ULTRACUT-S, and this ultra-thin film slice is accelerated with a transmission electron microscope LEM-2000. The layer thickness was measured by observing and photographing at 100 kV.

(2) Total light transmittance and haze Measured with a haze meter HCM-2B manufactured by Suga Test Instruments Co., Ltd. according to JIS K7150.

(3) Surface specific resistivity It measured based on JISK7194 using Mitsubishi Chemical Corporation Lorester MCP-T600. The measurement was performed five times at an arbitrary location, and the average value thereof was taken.

(4) A sheet of polyethylene terephthalate having a contact resistance value of 750 μm is cut into a long side of 130 mm and a short side of 70 mm, and this is a square with a side of 30 mm centering on a point of 30 mm from the end of the long side and 40 mm from the end of the short side. The part was cut and removed, and a spacer having a double-sided paper tape with a width of 5 mm (made by Nichiban: Nystack NW-5) on four sides was prepared.
For measuring two sheets of conductive film cut into a long side of 130 mm and a short side of 70 mm, leaving only 3 mm from the end on one side of the short side and a conductive tape (manufactured by Shinto Chemical Co., Ltd .: STRtape width 8 mm) Created as a sample.
With the measurement sample created above, the side with the conductive tape applied is the right side, and the spacer from which the release paper of the double-sided tape has been peeled is overlaid, and another measurement sample is attached to the side with the conductive tape applied. Were stacked on the left side to create a contact resistance measuring cell.
Using a rubbing tester manufactured by Taihei Rika Kogyo Co., Ltd., the conductive film is brought into contact with each other by applying a load of 1.38 kg with a round bar having a diameter of 8 mm at the center of the window with a side of 30 mm on one side of the spacer. A voltage of 5 V was applied between the tape electrodes by a constant voltage power source, and the voltage at this time was measured to calculate the resistance value of the cell to obtain the contact resistance value.

(5) Suitability test for touch panel As a measure of suitability of the conductive film to the touch panel, a model touch panel was prepared, and a linearity test by pen input was performed. In this test, a conductive film was cut out to 100 mm × 100 mm, and an electrode having a width of 5 mm was applied to both ends of the transparent conductive coating layer forming surface by applying silver paste. A voltage V _{i, j is} applied to 2500 points from (x ₁ , y ₁ ) to (x ₅₀ , y ₅₀ ) in a sample center portion of 50 mm × 50 mm at intervals of 1 mm in the vertical direction by applying 5 V between the electrodes by a constant voltage power source. (I, j = 1 to 50) was measured. The deviation from the theoretical voltage U i, j = V _1,1 + (V _50,50 −V _1,1 ) / 50 × (j−1) at each voltage measurement point is expressed as Δ _{i, j} = ( _{Vi, j} − U _{i, j} ) / U _{i, j} , and the maximum absolute value of Δ _{i, j} is defined as linearity.
The test was performed by applying a load of 250 gf with a touch pen made of polyacetal resin and having a pen tip radius of 0.8 mm from the side of the panel plate made of a conductive film.
○: Linearity is less than 3%.
X: Linearity is 3% or more.

[Example 1]
Conductive paint comprising poly (3,4-ethylenedioxythiophene) and polystyrene sulfonic acid as main components, and containing a silane coupling agent and diethylene glycol (Nippon Agfa Gevaert Co., Ltd., trade name: Orgacon S) -300) is applied onto a substrate film (PET film, manufactured by Teijin DuPont Films, trade name: O3PF8W-100) using a Mayer bar, and dried at 140 ° C. for 1 minute to have a film thickness of 150 nm. A transparent conductive coating layer was formed. Next, on the transparent conductive coating layer, the same conductive paint as described above (product name: Orgacon S-300, manufactured by Nippon Agfa Gevaert Co., Ltd.) was applied again using a Mayer bar, and 140 ° C. And dried for 1 minute to obtain a transparent conductive coating layer having a total film thickness of 200 nm. The evaluation results of the obtained conductive film are shown in Table 1.

[Example 2]
Conductive paint (Nippon Agfa Gebalt Co., Ltd., trade name: Orgacon S-300) on a base film (PET film, Teijin DuPont Films, trade name: O3PF8W-100) using a Mayer bar And dried at 140 ° C. for 1 minute to form a transparent conductive coating layer having a thickness of 200 nm. The obtained conductive film was subjected to an applied current of 4A, a distance between the film and the electrode of 1 mm, and a processing speed of the film of 0.1 m / s using a table corona discharge treatment machine CG-102 manufactured by Kasuga Electric. The treatment was performed 4 times. The evaluation results of the obtained conductive film are shown in Table 1.

[Example 3]
The same operation as in Example 2 was performed except that the corona discharge treatment was changed to the plasma discharge treatment. At this time, the plasma discharge treatment was performed using a normal pressure plasma surface treatment apparatus (AP-T03-L manufactured by Sekisui Chemical Co., Ltd.) under a nitrogen stream (flow rate 60 L / min) at a film processing speed of 0.2 m / min. The surface of the transparent conductive coating layer was treated three times. The evaluation results of the obtained conductive film are shown in Table 1.

[Comparative Example 1]
Conductive paint (Nippon Agfa Gebalt Co., Ltd., trade name: Orgacon S-300) on a base film (PET film, Teijin DuPont Films, trade name: O3PF8W-100) using a Mayer bar And dried at 140 ° C. for 1 minute to form a transparent conductive coating layer having a thickness of 200 nm. The evaluation results of the obtained conductive film are shown in Table 1.

[Example 4]
100 parts by weight of an aqueous dispersion (BaytronP: Bayer AG) comprising 0.5% by weight of poly (3,4-ethylenedioxythiophene) and 0.8% by weight of polystyrene sulfonic acid (molecular weight Mn = 150,000) Orgacon is a conductive coating composition in which 3 parts by weight of diethylene glycol, 0.65 parts by weight of 3-glycidoxypropyltrimethoxysilane and 1 part by weight of PLUSCOAT RY-2 (manufactured by Kyoyo Chemical Industry) as a surfactant are added. The same operation as in Example 1 was performed except that S-300 was used instead. The evaluation results of the obtained conductive film are shown in Table 1.

[Comparative Example 2]
An aqueous dispersion of a polymer (BaytronP: Bayer AG) comprising 0.5% by weight of a conductive polymer (3,4-ethylenedioxythiophene) and 0.8% by weight of polystyrenesulfonic acid (molecular weight Mn = 150,000) ) Conductive coating in which 3 parts by weight of diethylene glycol, 0.65 parts by weight of 3-glycidoxypropyltrimethoxysilane and 1 part by weight of PLUSCOAT RY-2 (manufactured by Kyodo Chemical Co., Ltd.) as a surfactant were added to 100 parts by weight The same operation as in Comparative Example 1 was performed except that the composition was used in place of Orgacon S-300. The evaluation results of the obtained conductive film are shown in Table 1.

[Reference example]
Table 1 shows the characteristics of ITO film (OTEC 250B-100N) having a surface resistivity of 450Ω / □ manufactured by Tobi.

  As can be seen from Table 1, it can be seen that the conductive film of the present invention is excellent in transparency and conductivity, and has a contact resistance value equivalent to that of the ITO-based conductive film.

  The conductive film of the present invention described above has a transparency, conductivity, and contact resistance equivalent to those obtained by laminating ITO while using a conductive polymer. For example, a liquid crystal display ( LCD) can be suitably used as transparent electrodes for transparent touch panels, organic electroluminescent elements, inorganic electroluminescent lamps and the like.

The spacer front view used for the Example of this invention. The measurement sample front view used for the Example of this invention.

Claims (3)

On at least one side of the base film, the following general formula

(Wherein R ¹ and R ² each independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms, or an alkylene group having 1 to 12 carbon atoms which may be optionally substituted together) A conductive film provided with a transparent conductive film comprising a conductive polymer composed of a polycationic polythiophene and a polyanion composed of a repeating unit represented by the following formula, and its total light transmittance: There 70%, surface resistivity Ri ratio 6 der following the 10~1 × 10 ⁴ Ω / □ in and contact resistance, since the transparent conductive coating film, a transparent conductive coating film When the coating composition is applied, it is a transparent conductive coating formed by applying it twice or more, or after the formation of the transparent conductive coating, corona discharge treatment or plasma discharge treatment is performed. transparent conductive coating film der subjected Conductive film, characterized in that. 2. The conductive film according to claim 1, having a total light transmittance of 80% or more and a surface resistivity of 10 to 5 × 10 ³ Ω / □. When manufacturing the conductive film according to claim 1 or 2, when applying a coating composition for forming a transparent conductive coating film, it is applied in two or more times, or A method for producing a conductive film, wherein a corona discharge treatment or a plasma discharge treatment is performed on the transparent conductive coating after the formation of the transparent conductive coating.

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