JP2001174604A - Antireflection transparent electrically conductive laminated film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antireflection transparent electrically conductive laminated film used for the face plate of a cathode-ray tube, a plasma display or the like and excellent in antistatic property, electromagnetic wave shielding performance, antireflection property, mechanical characteristics and antifouling property. SOLUTION: A hard coat layer, a transparent electrically conductive layer with fine particles comprising one or more metals, at least one transparent antireflection layer having a refractive index different from that of the electrically conductive layer and an antifouling layer formed as the outermost layer are successively disposed on a high elasticity transparent substrate of polyethylene naphthalate or the like to obtain the objective antireflection transparent electrically conductive laminated film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antireflection transparent conductive laminated film having excellent antistatic effect, electromagnetic wave shielding effect, antireflection effect, mechanical properties and antifouling property.

[0002]

2. Description of the Related Art In a cathode ray tube or a plasma display used as a TV cathode ray tube or a computer display, dust adheres due to static electricity generated on a face panel surface, thereby lowering visibility. It has problems such as adverse effects. Further, the flattening of the cathode ray tube or the like requires an antireflection function. Further, there is a problem that the face panel surface is liable to be scratched by touching or removing dirt.

For the purpose of preventing static electricity, shielding electromagnetic waves and preventing reflection, a method has been proposed in which a conductive layer is formed directly on the face panel surface by vapor deposition or sputtering of a metal such as silver or a conductive metal oxide such as ITO. However, vacuum processing and high-temperature processing are required for film formation, which increases the manufacturing cost and raises productivity problems.

A method of forming a conductive thin film by a coating method by a sol-gel method has also been proposed (Hanyu et al., National
Technical Report 40, No.1 (1994) 90), requires high-temperature treatment, and can be used as a base material when laminated on a plastic film or hard coat, which is a transparent base material, due to the deterioration of the base material There was a problem that the material was limited.

[0005] A transparent conductive paint in which conductive oxide fine particles and colloids are dispersed has also been proposed (JP-A-6-34).
4489, JP-A-7-268251), and there was a problem that the conductivity of the obtained transparent conductive layer was low.

Further, in order to increase the conductivity, a transparent conductive film made of fine metal particles has been proposed (JP-A-63-160140, JP-A-9-55175). In addition, a method of forming a low-reflection transparent conductive film by applying an antireflection paint such as tetraethoxysilane on the transparent conductive film has been proposed (JP-A-10-142401).
The problem that mechanical strength is weak just by coating metal fine particles on a transparent base material, and anti-reflective coatings such as tetraethoxysilane require long-term high-temperature heat treatment, and the anti-reflection layer is laminated by a sol-gel method. However, there is a problem that the use of a transparent base material is limited, and there is a problem that the method for forming a low-reflection transparent conductive film can only be directly applied to a glass face panel.

Also, silver fine particles are directly applied to a glass face panel by a spin coating method, and a sintering reaction is caused at about 150 ° C., and Ag ₂ O on the surface is also decomposed to be baked to cause a conductive property. Although an improvement has been proposed (Japanese Patent Laid-Open No. 10-66861), it can be applied only to heat-resistant substrates such as glass.

In view of the above, there has been proposed a method of directly forming a coating film on the front surface of a face panel which requires a high investment and requires a high-temperature treatment, and a method of attaching a thin film formed on a base material (Taki et al., National Technical Report, 42,
No. 3 (1996) 264-268).

The method of forming these thin films is a method of forming a conductive layer by depositing or sputtering a conductive metal oxide such as ITO, and requires a vacuum treatment for forming the film, which is expensive. Or there was a problem with productivity.

In order to solve these problems, a hard coat layer on a transparent substrate, a transparent conductive layer having fine particles of at least one kind of metal, and an outer layer of the transparent conductive layer are formed. A low-reflection transparent conductive laminated film composed of at least one transparent coating layer having a refractive index different from the refractive index of the layer and an antifouling layer formed on the outermost layer has been developed, but the mechanical properties are still low. In particular, characteristics relating to surface hardness, such as a pencil scratch test, were not sufficient. Wipe off dust and dirt attached to the face panel surface such as a cathode ray tube or plasma display used as a TV cathode ray tube or a computer display,
Scratches occur when the surface is rubbed with a hard object.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has an antistatic property,
An object of the present invention is to provide an anti-reflective transparent conductive laminated film that can be attached to a face panel that has excellent mechanical properties in addition to electromagnetic wave shielding, anti-reflection, anti-fouling, and productivity.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to provide a hard coat layer, a transparent conductive layer having fine particles of one or more metals, and a refractive index different from that of the transparent conductive layer on a transparent substrate. In the antireflection transparent conductive laminated film provided with at least one transparent antireflection layer having a modulus and an antifouling layer formed as the outermost layer, the transparent substrate has a Young's modulus of 540 × 10 ⁷ Pa or more. The problem was solved by an antireflective conductive laminated film characterized by the following.

The transparent substrate of the present invention has a transmittance of about 80% or more, and preferably has a transmittance of 90% or more. 1
Fine particles composed of more than one kind of metal include fine particles composed of a single metal and fine particles composed of a metal alloy. The transparent conductive layer has a transmittance of about 50% or more, preferably 60%
It has the above transmittance. About 50% of transparent anti-reflective layer
It has the above transmittance, and preferably has a transmittance of 60% or more. One of the essential constituent layers of the present invention, a transparent substrate, a hard coat layer, a transparent conductive layer, an antireflection layer, and an antifouling layer.
The above layers may be two or more layers as necessary. For example, the hard coat layer may be composed of two layers having the same or different compositions, and the transparent antireflection layer may be composed of two layers having different refractive indices. Conversely, the antireflection layer may also have the function of an antifouling layer and be the outermost layer. In this case, three layers are provided on the transparent substrate.

The antireflective transparent conductive film of the present invention is
By directly laminating on the surface of a cathode ray tube or a plasma display used as a V cathode ray tube or a computer display, a conventional conductive film forming technique using a PVD method or a CVD method, or a direct conductive film on a face panel or the like. In comparison with the method of applying a varnish, the equipment and the process can be significantly simplified, and the surface mechanical properties, particularly the resistance to the pencil scratch test, can be improved.

[0015]

Embodiments of the present invention will be described below in detail. FIG. 1 shows an antireflection transparent conductive laminated film which is a preferred embodiment of the present invention. A hard coat layer from the side of the base material base, a transparent conductive layer made of metal fine particles, and a transparent antireflection layer having a refractive index different from that of the transparent conductive layer formed on the outer layer, and an outermost layer formed of an antifouling layer. I have.

The laminated film is provided with a hard coat layer to prevent the film from being damaged. Since the transparent conductive layer made of metal fine particles is laminated, the laminated film is conductive. Electromagnetic waves radiated from a tube or the like can be effectively blocked, and furthermore, external reflection light can be reduced by the antireflection layer. The antifouling layer provided on the outermost layer can prevent the film from being stained.

As the transparent substrate used in the present invention, a film-shaped transparent plastic film having an elastic modulus of 540 × 10 ⁷ Pa or more by a tensile test can be used, and preferably 540 × 10 ⁷ Pa or more and 200 × 10 ^8. A transparent plastic film of Pa or less can be used. If the elastic modulus is too high, there is no flexibility and the brittleness is extremely poor, so that the film cannot function as a film.
Specific examples of these include polyethylene naphthalate,
Films such as polyimide and aromatic polyamide can be used, but polyethylene naphthalate is preferred.
There is no particular limitation on the thickness of this transparent substrate film,
The thickness of these films is preferably 20 to 500 μm, and the thickness of these films is preferably 20 to 500 μm. If the thickness is too thin, the film strength is weak. . This transparent substrate film may be colored or vapor-deposited as desired, and may contain an ultraviolet absorber. Further, for the purpose of improving the adhesion to a layer provided on the surface, one or both surfaces can be subjected to a surface treatment by an oxidation method, a roughening method, or the like, if desired. Examples of the oxidation method include corona discharge treatment, glow discharge treatment, chromic acid treatment (wet method), flame treatment, hot air treatment, and ozone / ultraviolet irradiation treatment. Further, one or more undercoat layers can be provided. Examples of the material for the undercoat layer include copolymers or latexes of vinyl chloride, vinylidene chloride, butadiene, (meth) acrylate (meaning of methacrylate or acrylate; the same applies hereinafter), vinyl ester, and the like. Examples include water-soluble polymers such as gelatin.

As the hard coat used in the present invention, a known curable resin can be used, and examples thereof include a thermosetting resin and a radiation curable resin. Melamine resin as thermosetting resin,
Some use a crosslinking reaction of a prepolymer such as a urethane resin or an epoxy resin. Examples of the radiation-curable resin include trifunctional or higher-functional polyfunctional monomers. Examples thereof include pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol tetraacrylate, and trimethylolpropane triacrylate. Active energy rays such as acrylates (including gamma rays, electron beams, ultraviolet rays, etc.)
Curable compounds, in particular, UV curable compounds.
A polymerization initiator can be added to these compounds as needed.

In order to increase the hardness in the hard coat layer, fine particles of oxides such as silica, alumina, titania and zirconia and colloidal particles can be added as a filler. The hardness of these particles is preferably higher, and those having a Mohs hardness of 6 or more are more preferable. The particle size of these fine particles is preferably from 1 to 100 nm.
The addition amount of the fine particles is preferably 20 to 50% by volume or less of the curable resin. If the content is 50% by volume or more, the film becomes brittle, and if the content is too small, the added effect cannot be obtained. The layer thickness of the hard coat is preferably from 2 to 30 μm, particularly preferably from 4 to 10 μm. If necessary, an anionic surfactant or a cationic surfactant may be added, or a corona treatment, a glow treatment,
Surface treatment such as flame treatment can be performed to improve the hydrophilicity and adhesion of the hard coat surface.

The transparent conductive layer of the present invention basically comprises a layer containing fine particles of at least one metal. Fine particles composed of one or more metals include gold, silver,
Examples thereof include metals such as copper, aluminum, iron, nickel, palladium, and platinum, and alloys thereof. Particularly, silver is preferable, and an alloy of palladium and silver is more preferable from the viewpoint of weather resistance. 5-30 as the content of palladium
wt% is preferable. When the amount of palladium is small, the weather resistance is poor, and when the amount of palladium is large, the conductivity is reduced. Examples of the method for preparing metal fine particles include a method for preparing fine particles by a low vacuum evaporation method and a method for preparing a metal colloid in which an aqueous solution of a metal salt is reduced with a reducing agent such as iron (II), hydrazine, boron hydride, or hydroxyethylamine. No.

The average particle diameter of these metal fine particles is 1 to 100.
nm is preferred. If it exceeds 100 nm, the absorption of light by the metal particles becomes large, so that the light transmittance of the particle layer is reduced and the haze is increased.
When the average particle diameter of these metal fine particles is less than 1 nm, it becomes difficult to disperse the fine particles, and the surface resistance of the fine particle layer sharply increases. No coating can be obtained. Preferably, the transparent conductive layer is substantially composed of only metal fine particles,
It is preferable not to contain a non-conductive material such as a binder from the viewpoint of conductivity.

In order to form a metal fine particle layer, a coating material in which metal fine particles are dispersed in a solution mainly composed of water or an organic solvent is applied on a hard coat. For the purpose of stabilizing the dispersion of the metal fine particles, a solution mainly composed of water is preferable. As a solvent that can be mixed with water, ethyl alcohol, n
Alcohols such as -propyl alcohol, i-propyl alcohol, butyl alcohol, methyl cellosolve and butyl cellosolve are preferred. The amount of metal applied is 5
The amount is preferably from 0 to 150 mg / m ^{2. If} the coating amount is small, the conductivity cannot be obtained, and if the coating amount is large, the transmittance is poor.

The surface resistivity of the transparent conductive layer is required to be 1000 Ω / □ or less in order to meet the TCO guidelines established by the Swedish Central Workers' Council, and the transmittance is preferably 50% or more.

Heat treatment or water treatment can be performed to improve the conductivity and permeability of the transparent conductive layer. The heat treatment depends on the heat resistance of the plastic film, but is preferably 150 ° C. or lower. 100 ° C to 150 ° C is preferred. If the temperature is higher than 150 ° C., the plastic film is likely to be deformed by heat. If the temperature is lower than 100 ° C., the effect of the heat treatment is hardly obtained, and a long processing time is required.

The heat treatment is preferably carried out while passing through a heating zone in a web state, since uniform treatment can be achieved. The stay time can be adjusted by the length of the heating zone and the transport speed. It is also possible to heat the roll-shaped film in a high-temperature bath, but it is necessary to set a time in consideration of variations in heat conduction.

Further, prior to the heat treatment, the heat treatment can be further efficiently performed by subjecting the transparent conductive layer to a water treatment such as washing with water. Water treatment such as water washing includes application of only water by a normal application method, specifically, dip coating, application of water by a wire bar, etc. In addition, water is applied to the transparent conductive layer by spraying or showering. There is a way. After water is applied to the transparent conductive layer, excess water can be scraped off with a wire bar or a rod bar or with an air knife as necessary.

These water treatments can further reduce the surface resistance of the transparent conductive bath after the heat treatment, increase the transmittance, flatten the transmission spectrum, and reflectivity after the antireflection layer is laminated. The effect on the reduction of the amount becomes significant.

The refractive index of at least one transparent antireflection layer having a refractive index different from that of the transparent conductive layer of the present invention is preferably smaller than 2. Preferably, the product of the refractive index and the thickness (nm) of the transparent antireflection film is 100 to 20.
It is preferable to fall within the range of 0. As these substances, for example, organic synthetic resins such as polyester resin, acrylic resin, epoxy resin, melamine resin, polyurethane resin, polyvinyl butyral resin, ultraviolet curing resin,
Hydrolysis products of metal alkoxides such as silicon, or organic compounds such as silicone monomers and silicone oligomers
A transparent oxide film formed by a sol-gel reaction of an inorganic compound, silica, alumina, titania, zirconia, or a mixture thereof can be used. Particularly preferably, radiation curable resins such as pentaerythritol tetra (meth) acrylate and dipentaerythritol hexa (meth) acrylate, or those obtained by adding fine particles of silica or alumina to these resins are preferable because they increase the surface hardness.

The outermost antifouling layer is preferably a known fluorine-containing compound having a low surface energy, specifically, a silicon compound containing a fluorinated hydrocarbon group, a fluorinated hydrocarbon group-containing polymer, or a fluorine-containing compound. Examples include grafted hydrocarbons, grafts of monomers having silicon, and block copolymers. These are preferably thermosetting or crosslinkable resins containing a radiation-curable group. The contact angle of water on the surface is preferably 80 ° C. or more, more preferably 90 ° C. or more.

The laminated film of the present invention is prepared by coating each layer of the coating on the base film by a known thin film forming method such as a dipping method, a spinner method, a spray method, a roll coater method, a gravure method, and a wire bar method. It can be formed by sequentially forming and drying.

[0031]

The present invention will be described more specifically with reference to the following examples. Preparation of paint: Preparation of coating liquid for hard coat layer: (Surface treatment of silica fine particles) 200 g of a 40% by weight methanol dispersion of silica fine particles having an average particle diameter of 15 nm was 500 ml equipped with a stirrer, a thermometer and a reflux condenser.
In a three-necked glass flask. Here, 2N hydrochloric acid was added.
After adding 2 g and heating to 60 ° C. under a nitrogen stream, 10 g of 3-methacryloyloxypropyltrimethoxysilane was added.
Was added and stirring was continued for 4 hours to surface-treat the silica fine particles.

(Preparation of Hard Coat Layer Coating Solution) A 43% by weight methanol dispersion of surface-treated silica fine particles 11
To 6 g, 97 g of methanol and 163 g of isopropanol
And 163 g of butyl acetate. To the mixture, 200 g of a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA, manufactured by Nippon Kayaku Co., Ltd.) was added and dissolved. 7.5 g of a photopolymerization initiator (Irgacure 907, manufactured by Ciba Geigy) and a photosensitizer (Kayacure DET) were added to the obtained solution.
X, manufactured by Nippon Kayaku Co., Ltd.) and dissolved. After stirring the mixture for 30 minutes, the mixture was filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution for a hard coat layer (hard coat agent (1)).

[0033] Preparation of silver-palladium colloid coating solution: adjusted (silver adjustment of palladium colloid dispersion) 30% iron sulfate _{(II) FeSO 4 · 7H 2} O, 40% citric acid,
Mix, maintain at 20 ° C. and stir with stirring 10% silver nitrate and palladium nitrate (9/1 molar ratio)
The solution was added and mixed at a rate of 200 ml / min, and thereafter, washing with water was repeated by centrifugation, and pure water was finally added to a concentration of 3% by weight to prepare a silver-palladium colloidal dispersion. The particle size of the obtained silver colloid particles is TE
As a result of M observation, the particle size was about 9 to 12 nm. ICP
As a result, the ratio of silver to palladium was the same as the charging ratio of 9/1.

(Adjustment of Silver Colloid Coating Solution) To 100 g of the silver colloid dispersion solution, i-propyl alcohol was added, ultrasonically dispersed, and filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution.

Preparation of Coating Solution for Antireflection Layer A mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPH
A, 2 g of Nippon Kayaku Co., Ltd., 80 mg of photopolymerization initiator (Irgacure 907, Ciba-Geigy) and 30 m of photosensitizer (Kayacure DETX, Nippon Kayaku Co., Ltd.)
g was dissolved in a mixed solution of 38 g of methyl isopropyl ketone, 38 g of 2-butanol and 19 g of methanol.
After stirring the mixture for 30 minutes, the mixture was filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution for a low antireflection layer.

Preparation of Coating Solution for Antifouling Layer To a heat-crosslinkable fluoropolymer (JN-7214, manufactured by Nippon Synthetic Rubber Co., Ltd.), isopropyl alcohol was added.
A 2% by weight crude dispersion was prepared. The coarse dispersion was further ultrasonically dispersed to prepare a coating solution for an antifouling layer.

Example 1 Preparation of Antireflective Transparent Conductive Laminated Film: A hard coat coating solution was applied to a 90 μm polyethylene naphthalate film using a wire bar to a layer thickness of 8 μm, dried, and irradiated with ultraviolet rays. A hard coat layer was produced. After the corona treatment, the silver colloid coating solution was coated with a wire bar at a coating amount of 70 mg / m ^2.
And dried at 40 ° C. Water fed by a pump was sprayed on the silver colloid-coated surface, excess water was removed with an air knife, and a treatment was carried out for 5 minutes while transporting in a heating zone at 120 ° C. Next, an antireflection layer was applied to a thickness of 80 nm, dried, and irradiated with ultraviolet rays. Further, the coating solution for the antifouling layer was similarly applied at 5 mg / m ² with a wire bar, and dried and heat-treated at 120 ° C.

Comparative Examples 2 and 3 Instead of polyethylene naphthalate film, polyethylene terephthalate was used.
A laminated film was produced in the same manner as in Example 1 except that cellulose triacetate was used.

[Example 2, Comparative Examples 3 and 4] No fine particles of surface-treated silica were added to the hard coat layer coating solution used in Example 1, Comparative Examples 2 and 3 (hard coat agent (2)).
In the same manner, a laminated film was prepared.

Table 1 shows the results of measuring the characteristics of the laminated film thus produced. The surface electric resistivity of each film is 2
00Ω / □, the average reflectance was 0.8%, and the antifouling property was good (（).

Table 1 shows the results of the pencil scratch hardness test of the laminated film thus produced. In the table, PEN represents polyethylene naphthalate, PET represents polyethylene terephthalate, and TAC represents cellulose triacetate.

[0042]

[Table 1]

Each measurement was performed by the following method. (Evaluation of anti-reflection film) (1) Surface resistivity 4-terminal method surface resistivity meter (Loresta G manufactured by Mitsubishi Chemical Corporation)
P)) (2) Average reflectance 450-65 using a spectrophotometer (manufactured by JASCO Corporation).
Average reflectance of specular reflection of incident light 5 ° in a wavelength region of 0 nm. (3) Antifouling property Evaluation of the state where fingerprints were adhered to the film surface and wiped off using Toray's Toraysee (○ indicates that the fingerprints were completely wiped off, × indicates that some of the fingerprints were not wiped off Left in the state). (4) Measurement of Young's modulus Tensilon UT, a universal tensile tester manufactured by Toyo Seiki Seisaku-sho, Ltd.
Using "M-II-20", the film cut into a predetermined size was pulled at a speed of 50% / min, and the Young's modulus was determined from the gradient of the initial stress change. (5) Hardness of Pencil Scratch Test After conditioning the film for 2 hours at a temperature of 25 ° C. and a relative humidity of 60%, using a test pencil specified by JIS-S-6006, specified by JIS-K-5400. According to the pencil hardness evaluation method, the value of the pencil hardness at which no scratch is observed at a load of 1 kg.

According to Table 1, the Young's modulus is 540 × 10 ⁷ Pa.
It can be seen that the hard coat provided on the above-described base material has improved the pencil hardness by one rank as compared with other films. This low-reflection transparent conductive laminated film, in which a hard coat layer, a silver colloid layer, an antireflection layer and an antifouling layer are laminated on this substrate, has excellent conductivity, and furthermore has excellent antireflection properties, antifouling properties and excellent mechanical properties It turns out that it is equipped with. In recent years, plastic products are being replaced with glass products from the viewpoint of workability and weight reduction.However, since the surface of these plastic products is easily damaged, a case where a hard coat film is used for the purpose of imparting scratch resistance is used. There are many.
In addition, even with conventional glass products, the number of cases where plastic films are bonded to prevent scattering is increasing,
Due to insufficient hardness, a hard coat is widely formed on the surface thereof, and it is naturally possible to use the film of the present invention in the form of a film with a hard coat. In addition, a film having a hard coat layer coated on a substrate having a large Young's modulus is used to provide a transparent conductive layer other than metal fine particles, for example, an oxide or the like represented by ITO. It is of course possible to make a conductive film.

[0045]

The anti-reflective transparent conductive laminated film of the present invention is a film having a simple layer structure, which has an antistatic property, an electromagnetic wave shielding property, and a surface reflection prevention, and has a high surface mechanical strength. It is possible to obtain an antireflection transparent conductive film having characteristics. Therefore, by laminating on a surface of a cathode ray tube, a plasma display or the like, it is possible to provide an anti-reflection transparent conductive laminated film capable of adding excellent mechanical strength in addition to electromagnetic wave shielding, anti-reflection, and surface contamination prevention functions.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a layer configuration of an antireflection transparent conductive laminated film according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent base material 2 Hard coat layer 3 Transparent conductive layer 4 Antireflection layer 5 Antifouling layer

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Naohiro Matsunaga 210 Nakanakanuma, Minamiashigara, Kanagawa Prefecture Inside Fuji Photo Film Co., Ltd. (72) Inventor Akihiro Ikeyama 210 Nakanakanuma, Minamiashigara City, Kanagawa Prefecture Fuji Photo Film Co., Ltd. Reference) 2K009 AA04 AA15 BB24 CC09 CC26 DD02 DD05 DD06 EE02 EE03 5G435 AA00 AA08 AA16 BB02 BB06 DD12 GG32 GG33 HH02 HH03 HH12 KK07 LL04 LL06 LL08

Claims (3)

[Claims] 1. A hard coat layer on a transparent substrate,
A transparent conductive layer having fine particles of one or more metals, at least one transparent antireflection layer having a refractive index different from that of the transparent conductive layer, and an antifouling layer formed as an outermost layer are provided. An anti-reflection conductive laminated film, wherein the transparent base material has a Young's modulus of 540 × 10 ⁷ Pa or more. 2. The antireflection transparent material according to claim 1, wherein the fine particles made of one or more metals are silver or an alloy mainly composed of silver, and the particle size is 1 to 100 nm. Conductive laminated film. 3. The method according to claim 1, wherein the transparent substrate is a polyethylene naphthalate film.
4. The anti-reflective transparent conductive laminated film according to item 1.