KR101524580B1 - Transparent conductive film, touch panel, and display device - Google Patents

Abstract

A transparent conductive film having excellent antireflection property at low cost is provided. Wherein the base film has a transparent conductive film on one side of a base film having a refractive index of 1.6 to 1.7 and a low refractive index layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm through the adhesive layer on the other side of the base film, The adhesive layer is a transparent conductive film satisfying the following Condition 1, Condition 2, or (Condition 1 and Condition 2). Condition 1; The absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.08 or less. Condition 2; The thickness of the adhesive layer is 5 nm or more and less than 50 nm.

Description

TECHNICAL FIELD [0001] The present invention relates to a transparent conductive film, a transparent conductive film, a touch panel, and a display device.

TECHNICAL FIELD The present invention relates to a transparent conductive film having good light transmittance. More specifically, the present invention relates to a transparent conductive film capable of suppressing a decrease in transmittance of light emitted from a display panel in a touch panel and a display device using a transparent conductive film.

A transparent conductive film to be used for a touch panel or the like is provided on the opposite surface of the transparent conductive film (the surface opposite to the surface on which the transparent conductive film is formed with respect to the base film) to provide scratch resistance on the touch input surface and anti- It is known to laminate functional layers such as a coat layer, an antireflection layer, and an antiglare layer (Patent Document 1, Patent Document 2).

In addition, the presence of the internal void layer (air layer) of the display device provided with the touch panel increases the interface reflection between the transparent conductive film and the air layer, thereby causing a problem that the transmittance of light emitted from the display panel is lowered. In order to solve this problem, it is known to use a transparent conductive film having an antireflection layer on the surface opposite to the transparent conductive film inside a touch panel or a display device (Patent Document 3, Patent Document 4).

Japanese Patent Application Laid-Open No. 11-34206 Japanese Patent Laid-Open No. 2001-15941 Japanese Patent Application Laid-Open No. 2000-321558 Japanese Patent Application Laid-Open No. 11-90458

The above patent documents disclose that a multilayer structure or a single structure can be employed as the antireflection layer. However, in the case of a multilayer structure, high antireflection properties tend to be obtained, but there is a problem that production costs (low productivity) and interference patterns tend to occur. When the antireflection layer has a single structure, there is a problem that the antireflection property can not be obtained although the cost is low, the antiscratching property is lowered, and the slipperiness and blocking resistance are lowered. In addition, the above patent document does not describe a single antireflection layer.

Accordingly, an object of the present invention is to provide a transparent conductive film having good antireflection properties at low cost. Another object of the present invention is to provide a touch panel using the transparent conductive film of the present invention and a display device provided with the touch panel.

The above object of the present invention has been achieved by the following invention.

1) A transparent conductive film is formed on one surface of a base film having a refractive index of 1.6 to 1.7, and a low refractive index layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm through the adhesive layer is formed on the other surface of the base film, , And the adhesive layer satisfies the following condition (1).

Condition 1; The absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.08 or less.

2) A transparent conductive film is formed on one surface of a base film having a refractive index of 1.6 to 1.7, and a low refractive index layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm is formed on the other surface of the base film through this adhesive layer, And the adhesive layer satisfies the following condition (2).

Condition 2; The thickness of the adhesive layer is 5 nm or more and less than 50 nm.

3) A transparent conductive film is formed on one surface of a base film having a refractive index of 1.6 to 1.7, and a low refractive index layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm through the adhesive layer is formed on the other surface of the base film, And the adhesive layer satisfies the following Condition 1 and Condition 2:

Condition 1; The absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.08 or less.

Condition 2; The thickness of the adhesive layer is 5 nm or more and less than 50 nm.

4) The method according to 1) or 3)

Wherein an absolute value of a difference between a refractive index of the base film and a refractive index of the adhesive layer is 0.05 or less.

5) The method according to 1) or 4)

Wherein the adhesive layer has a thickness of 5 nm or more and less than 200 nm.

6) In any one of 1) to 5)

Wherein the base film is a polyester film.

7) In 6)

Wherein the polyester film is a polyethylene terephthalate film.

8) In any one of 1) to 7)

Wherein the adhesive layer contains at least a resin and a crosslinking agent.

9) In 8)

Wherein the resin is a polyester resin.

10) The method according to any one of 1) to 9)

Wherein the low refractive index layer is a layer obtained by applying an active energy ray curable resin composition by a wet coating method and curing the layer.

11) The method according to any one of 1) to 10)

Wherein the adhesive layer comprises particles and the relationship between the average particle diameter r of the particles and the thickness d of the adhesive layer satisfies the following formula 1. < EMI ID = 1.0 >

0.5? (R / d)? 20 Equation 1

12) The method according to 11)

Wherein the particles are contained in an amount of 0.05 to 20% by mass based on 100% by mass of the total solid content of the adhesive layer.

13) In any one of 1) to 12)

Wherein the low refractive index layer contains a polysiloxane compound having an ethylenic unsaturated group.

14) A touch panel comprising the transparent conductive film according to any one of 1) to 13).

15) A display device in which a touch panel is disposed on a display panel using the transparent conductive film according to any one of 1) to 13) above, wherein the low refractive index layer side of the transparent conductive film is disposed so as to face the display panel through the air layer And the display device.

16) A display device in which an electromagnetic wave shielding member using the transparent conductive film according to any one of 1) to 13) above is placed on a display panel, wherein the low refractive index layer side of the transparent conductive film faces the display panel through the air layer And wherein the display device is disposed on the display device.

(Effects of the Invention)

According to the present invention, it is possible to provide a transparent conductive film having good antireflection property at low cost. Further, by disposing the touch panel and / or the electromagnetic wave shielding member using the transparent conductive film of the present invention in the display device, it is possible to provide a display device having good light-transmissive property from the display panel.

Further, according to a preferred embodiment of the present invention, it is possible to provide a transparent conductive film having improved slidability.

Further, according to a preferred embodiment of the present invention, it is possible to provide a transparent conductive film in which oligomer precipitation from the base film is suppressed.

1 is a schematic cross-sectional view of an example of a display device having a resistive film touch panel using the transparent conductive film of the present invention.
2 is a schematic sectional view of an example of a display device having a capacitive touch panel using the transparent conductive film of the present invention.
3 is a schematic cross-sectional view of an example of a display device having a capacitive touch panel using the transparent conductive film of the present invention.
4 is a schematic sectional view of an example of a display device having an electromagnetic wave shielding member using the transparent conductive film of the present invention.

The transparent conductive film of the present invention has a transparent conductive film on one side of a base film and has only one low refractive index layer through the adhesive layer on the other side of the base film. Hereinafter, each component of the transparent conductive film of the present invention will be described in detail.

[Base film]

The base film of the present invention is a film having a refractive index in the range of 1.6 to 1.7. The refractive index of the base film is preferably as large as possible from the viewpoint of reducing the reflectance at the interface between the low refractive index layer and the air layer. Specifically, the refractive index of the base film is preferably 1.61 or more, more preferably 1.62 or more, further preferably 1.63 or more, and particularly preferably 1.64 or more.

The base film of the present invention can be selected from plastic films. Among the plastic films, a polyester film is preferable in view of tensile strength, heat resistance and solvent resistance, and a polyethylene terephthalate film (PET film) is particularly preferably used.

The thickness of the base film is suitably in the range of 20 to 300 mu m, preferably in the range of 30 to 200 mu m, and more preferably in the range of 50 to 150 mu m.

[Adhesive layer]

This adhesive layer of the present invention is intended to enhance the adhesion between the base film and the low refractive index layer and to maintain excellent antireflection properties (low reflectance) by the combination of the base film and the low refractive index layer described later. In order to maintain excellent antireflection property, this adhesive layer needs to satisfy the following condition 1, condition 2 or (condition 1 and condition 2). Particularly, it is preferable that the adhesive layer satisfies the condition 1.

Condition 1; The absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.08 or less.

Condition 2; The thickness of the adhesive layer is 5 nm or more and less than 50 nm.

[This adhesive layer satisfying Condition 1]

This adhesive layer under Condition 1 is the adhesive layer in which the absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.08 or less. The absolute value of the refractive index difference is preferably 0.06 or less, more preferably 0.05 or less, particularly preferably 0.03 or less, most preferably 0.01 or less. If the absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is larger than 0.08, good anti-reflection properties can not be obtained.

It is preferable that the hardness of the adhesive layer itself is not too high in the sense of enhancing the adhesion between the base film and the low refractive index layer. Since the transparent conductive film of the present invention has only a low refractive index layer of an extremely thin film on the adhesive layer, there arises a problem that if the thickness of the adhesive layer whose hardness is not too high, the hardness of the low refractive index layer is lowered. Therefore, it is preferable that the thickness of the adhesive layer is relatively small.

Specifically, the thickness of the adhesive layer is preferably less than 200 nm, more preferably less than 150 nm, further preferably less than 130 nm, and particularly preferably less than 100 nm. The thickness of the lower limit is preferably not less than 5 nm, more preferably not less than 10 nm, and even more preferably not less than 20 nm from the viewpoint of securing adhesion between the base film and the low refractive index layer.

This adhesive layer under Condition 1 is an adhesive layer having a relatively high refractive index. Such an adhesive layer can be obtained by containing a high refractive index material such as resin or metal oxide fine particles having a relatively high refractive index.

It is known to form this adhesive layer on a polyethylene terephthalate film. The refractive index of the polyethylene terephthalate film is usually about 1.63 to 1.67. The adhesive layer which is conventionally laminated in the prior art is made mainly of a resin such as a polyester resin, an acrylic resin, and a urethane resin. The refractive index is usually about 1.50 to 1.54 Small, does not meet Condition 1.

One form of the adhesive layer of Condition 1 is a resin using a resin having a high refractive index obtained by introducing an aromatic ring, a sulfur atom, a bromine atom, or the like into a resin such as polyester resin, acrylic resin or urethane resin. The content of the high refractive index resin is preferably 50 mass% or more, more preferably 60 mass% or more, and particularly preferably 70 mass% or more based on 100 mass% of the total solid content of the adhesive layer. The content of the upper limit is about 98% by mass.

As the resin having a high refractive index, a polyester resin having an aromatic ring in a molecule is preferable, and a polyester resin having a condensed aromatic ring in a molecule is more preferable. Examples of the condensed aromatic ring include naphthalene ring, fluorene ring and the like.

The polyester resin is generally obtained by polycondensation from a carboxylic acid component and a glycol component. The polyester resin having a naphthalene ring in the molecule can be synthesized by using a dicarboxylic acid having a naphthalene ring such as 1,4-naphthalenedicarboxylic acid or 2,6-naphthalenedicarboxylic acid as a carboxylic acid component can do. The refractive index of the polyester resin having a naphthalene ring in the molecule can be controlled by adjusting the ratio of the dicarboxylic acid having a naphthalene ring in the whole carboxylic acid component.

The polyester resin having a fluorene ring in the molecule can be synthesized by using a compound having a fluorene ring as a carboxylic acid component and / or a glycol component. The refractive index of the polyester resin can be controlled by adjusting the content of the fluorene ring-containing compound. A polyester resin having a fluorene ring in a molecule is described in detail, for example, in International Publication No. WO2009 / 145075, and can be synthesized with reference to this.

The polyester resin is preferably water-soluble or water-dispersible. The water-soluble or water-dispersible polyester resin can be synthesized by including a polycarboxylic acid having three or more carboxyl groups or a dicarboxylic acid having a sulfo group in the carboxylic acid component used for synthesis of polyester resin.

Another form of this adhesive layer under Condition 1 is a form containing metal oxide fine particles. This adhesive layer in this form is a layer in which metal oxide fine particles are dispersed in a resin. As the resin, for example, an acrylic resin (preferably an acrylic resin having an OH group such as an acrylic resin polyol), a polyester resin (preferably a polyester resin having an OH group such as a polyester resin polyol), an epoxy resin, , A styrene-maleic acid graft polyester resin, an acryl graft polyester resin, a silicone resin, or a polyester resin having a condensed aromatic ring in the molecule.

Examples of the metal oxide fine particles include titanium oxide, zirconium oxide, zinc oxide, tin oxide, antimony oxide, cerium oxide, iron oxide, zinc antimonate, indium tin oxide (ITO), antimony doped tin oxide (ATO) Aluminum-doped zinc oxide, and gallium-doped zinc oxide may be used. Among these metal oxide fine particles, titanium oxide and zirconium oxide are preferable in view of transparency, light resistance, and high refractive index, and zirconium oxide is particularly preferable.

The content of the resin and the metal oxide fine particles in the adhesive layer is suitably in the range of 100: 10 to 100: 400, more preferably 100: 20 to 100: 300, particularly 100: 30 to 100: Is preferable.

[This adhesive layer satisfying the condition 2]

The adhesive layer of Condition 2 has a thickness in the range of 5 nm or more and less than 50 nm. When the thickness of the adhesive layer is 50 nm or more, a low reflectance can not be obtained. On the contrary, when the thickness of the adhesive layer is less than 5 nm, the adhesion of the low refractive index layer is lowered. The thickness of this adhesive layer under Condition 2 is preferably as small as possible within the above-mentioned range of thickness, more specifically, preferably less than 40 nm, and more preferably less than 30 nm. The lower limit of the thickness of the adhesive layer is preferably 10 nm or more.

The refractive index of this adhesive layer under Condition 2 is not particularly limited, but is preferably in the range of 1.45 or more and less than 1.60, more preferably in the range of 1.47 to 1.59, and particularly preferably in the range of 1.48 to 1.58.

The adhesive layer of Condition 2 is preferably a layer containing a resin such as polyester resin, acrylic resin, or urethane resin.

This adhesive layer of Condition 2 can use this adhesive layer having the same composition as in Condition 1 above.

[This adhesive layer satisfying the conditions 1 and 2]

As this adhesive layer of the present invention, this adhesive layer satisfying the conditions 1 and 2 can be used.

[Contents common to this adhesive layer under Condition 1 and the adhesive layer under Condition 2]

Next, the contents common to this adhesive layer under Conditions 1 and Condition 2 will be described.

The adhesive layer of the present invention preferably contains at least a resin as described above. As such a resin, it is preferable to include at least a polyester resin. This adhesive layer containing the resin is described later in detail, but it is possible to laminate the adhesive layer in-line in the production process of the polyester film, and is advantageous in terms of productivity. The content of the resin in the adhesive layer is preferably 20% by mass or more, more preferably 30% by mass or more, and particularly preferably 50% by mass or more based on 100% by mass of the total solid content of the adhesive layer. The upper limit is about 98% by mass.

The adhesive layer preferably contains a crosslinking agent. Examples of the crosslinking agent include melamine crosslinking agents, oxazoline crosslinking agents, carbodiimide crosslinking agents, isocyanate crosslinking agents, aziridine crosslinking agents, epoxy crosslinking agents, methylol or alkylol urea crosslinking agents, acrylamide crosslinking agents, polyamide resins, Amide epoxy compounds, various silane coupling agents, and various titanate-based coupling agents. Among these crosslinking agents, at least one selected from the group consisting of a melamine crosslinking agent, an oxazoline crosslinking agent, a carbodiimide crosslinking agent, an isocyanate crosslinking agent and an aziridine crosslinking agent is preferably used.

The content of the crosslinking agent in the adhesive layer is preferably in the range of 1 to 40 mass%, more preferably in the range of 3 to 35 mass%, and more preferably in the range of 5 to 30 mass%, based on 100 mass% of the total solid content of the adhesive layer Particularly preferred.

The adhesive layer preferably contains at least a resin and a crosslinking agent. This further improves the adhesion between the base film and the low refractive index layer.

Further, this adhesive layer (the adhesive layer containing at least a resin and a crosslinking agent) is laminated on a base film, and a low refractive index layer described later (an active energy ray curable resin composition is coated by a wet coating method and cured Low-refractive-index layer) are stacked, oligomer precipitation from the base film can be suppressed.

When a polyethylene terephthalate film is used as the base film, an oligomer (cyclic trimer), which is a non-cross-linked component, may be precipitated on the surface of the polyethylene terephthalate film when the film is subjected to a heat treatment in a film forming process or the like of a transparent conductive film described later. This oligomer precipitation can be suppressed by laminating the adhesive layer (the adhesive layer containing at least a resin and a crosslinking agent) and a low refractive index layer (a low refractive index layer formed by coating an active energy ray curable resin composition by a wet coating method).

The thickness of the adhesive layer is preferably 50 nm or more, more preferably 60 nm or more, and particularly preferably 70 nm or more from the viewpoint of suppressing oligomer precipitation.

It is preferable that the adhesive layer further contains particles. In the case where only one low refractive index layer having a smooth film (80 to 120 nm) is laminated on this adhesive layer containing particles, the convex structure derived from the particles of the adhesive layer is also reflected in the low refractive index layer, The slipperiness of the surface of the low refractive index layer is improved even after the lamination, and good blocking resistance can be maintained.

From the above viewpoint, it is preferable that the average particle diameter (r) of the particles contained in the adhesive layer is a relatively large ratio to the thickness (d) of the adhesive layer. Specifically, it is preferable to satisfy the following formula (1), more preferably to satisfy the following formula (2), and particularly preferably to satisfy the following formula (3).

0.5? (R / d)? 20 Equation 1

1.0? (R / d)? 10 Expression 2

1.3? (R / d)? 6 Equation 3

The average particle diameter of the particles to be contained in the adhesive layer is preferably selected in the range of the above formulas 1 to 3, but the average particle diameter of the particles is preferably in the range of 10 to 600 nm, more preferably 20 to 500 nm More preferably in the range of 30 to 300 nm. The average particle diameter of the particles contained in the adhesive layer is the particle diameter determined by the number average.

The content of the particles in the adhesive layer is preferably in the range of 0.05 to 20 mass%, more preferably in the range of 0.1 to 15 mass%, particularly preferably in the range of 0.2 to 10 mass%, based on 100 mass% of the total solid content of the adhesive layer .

The particles contained in the adhesive layer are not particularly limited and examples thereof include inorganic particles such as silica particles, titanium oxide, aluminum oxide, zirconium oxide, calcium carbonate, carbon black and zeolite particles, acrylic particles, silicone particles, polyimide particles, (Registered trademark) particles, crosslinked polyester particles, crosslinked polystyrene particles, crosslinked polymer particles, core shell particles and the like. Of these, silica particles are preferable, and colloidal silica is particularly preferable.

The adhesive layer of the present invention is preferably laminated on the base film by the wet coating method, and the so-called inline coating method in which the adhesive layer is laminated in the production process of the base film is more preferable. Examples of the wet coating method include a reverse coating method, a spray coating method, a bar coating method, a gravure coating method, a rod coating method and a die coating method.

When this adhesive layer of the present invention is coated on the base film, it is preferable to subject the surface of the base film to corona discharge treatment, flame treatment, plasma treatment, or the like as a preliminary treatment for improving coatability and adhesion.

A mode in which polyethylene terephthalate (hereinafter abbreviated as PET) film is used as a base film in the above-mentioned inline coating method will be described below, but the present invention is not limited thereto.

PET pellets having an intrinsic viscosity of 0.5 to 0.8 dl / g, which is a raw material of a PET film, are vacuum dried and then fed to an extruder, melted at 260 to 300 ° C, extruded into a sheet form from a tee-shaped nip and subjected to electrostatic casting And wound up on a mirror casting drum having a surface temperature of 10 to 60 DEG C, followed by cooling and solidification to produce an unoriented PET film. This unstretched PET film is stretched 2.5 to 5 times in the longitudinal direction (also referred to as " longitudinal direction " in the direction of film advance) between rolls heated to 70 to 100 캜. At least one surface of the uniaxially stretched PET film obtained by this stretching is subjected to corona discharge treatment in air to adjust the wet tension of the surface to 47 mN / m or more, and the application liquid of the adhesive layer of the present invention is applied to the treated surface .

Next, the uniaxially stretched PET film coated with the coating liquid was gripped with a clip and guided to a drying zone. The uniaxially stretched PET film was dried at a temperature lower than the Tg of the uniaxially stretched PET film and then increased to a temperature of Tg or higher. The film is continuously stretched by 2.5 to 5 times in the transverse direction (also referred to as the " width direction " indicating the direction orthogonal to the film advancing direction) in a heating zone at 70 to 150 캜, followed by stretching by 5 to 5 times in the heating zone at 180 to 240 캜 A heat treatment is performed for 40 seconds to obtain a polyester film in which the adhesive layer is laminated on the PET film in which the crystal orientation is completed. In addition, during the heat treatment, a relaxation treatment of 3 to 12% may be carried out if necessary. The biaxial stretching may be longitudinal, transverse stretching or simultaneous biaxial stretching, or may be repeated in any one of the longitudinal and transverse directions after longitudinal and transverse stretching.

It is preferable that the adhesive layer of the present invention is not a resin layer that is cured by active energy rays such as ultraviolet rays or electron beams from the viewpoint of enhancing adhesion between the base film and the low refractive index layer. For example, when an active energy radiation curable high refractive index layer is directly laminated on a base film instead of the adhesive layer, adhesion between the base film and the high refractive index layer can not be sufficiently obtained.

(Low refractive index layer)

The low refractive index layer of the present invention is a layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm. The refractive index of the low refractive index layer is preferably 1.41 or less, more preferably 1.40 or less, and particularly preferably 1.39 or less. The refractive index of the lower limit is not particularly limited, but is about 1.30.

When the refractive index of the low refractive index layer is larger than 1.42, good antireflection properties can not be obtained. Further, even when the thickness of the low refractive index layer is out of the range of 80 to 120 nm, good antireflection properties can not be obtained.

The thickness of the low refractive index layer is preferably in the range of 85 to 115 nm, particularly preferably in the range of 90 to 110 nm.

As one form of the low refractive index layer, a metal fluoride film is exemplified. This metal fluoride film is a film laminated by a vapor deposition method such as a vacuum deposition method, a reactive deposition method, an ion beam assisted deposition method, a sputtering method, an ion plating method, and a plasma CVD method.

Examples of the metal fluoride, for example, magnesium fluoride (MgF _2), aluminum fluoride (AlF _3), calcium fluoride (CaF _2), barium fluoride (BaF _2), fluoride, strontium (SrF _2), cryolite (Na ₃ AlF ₆₎ , Thiolite (Na ₅ Al ₃ F ₁₄ ), sodium fluoride (NaF), and the like. Of these, magnesium fluoride is preferably used.

A preferred form of the low refractive index layer is a layer obtained by applying the active energy ray curable composition by a wet coating method and curing it.

As the wet coating method, a coating method such as a reverse coating method, a spray coating method, a bar coating method, a gravure coating method, a rod coating method, a die coating method, a spin coating method, and an extrusion method can be used.

As the active energy ray-curable composition, for example, a composition comprising an active energy ray-curable resin curable by an active energy ray such as ultraviolet rays or electron beams and a low refractive index inorganic particle and / or a fluorinated compound as a low refractive index material.

The active energy ray curable resin is a resin which is cured by active energy rays such as ultraviolet rays or electron beams, and monomers or oligomers having at least one ethylenic unsaturated group in the molecule are preferably used. Examples of the ethylenic unsaturated group include an acryloyl group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group, a vinyl group, and an allyl group. In the following description, the expression " (meth) acrylate " includes two compounds of " ... acrylate " and " methacrylate ".

Examples of the monomer include methyl (meth) acrylate, lauryl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, phenoxyethyl (Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxy- (Meth) acrylate such as neopentyl glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, trimethylolpropane tri Acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol tetra (Meth) acrylate such as dipentaerythritol hexa (meth) acrylate, tripentaerythritol tri (meth) acrylate, tripentaerythritol hexa (meta) triacrylate, trimethylol propane Acrylate, urethane acrylate such as glycerine di (meth) acrylate hexamethylene diisocyanate, pentaerythritol tri (meth) acrylate hexamethylene diisocyanate, and the like.

Examples of the oligomer include polyester (meth) acrylate, polyurethane (meth) acrylate, epoxy (meth) acrylate, polyether (meth) acrylate, alkyd (Meth) acrylate, and the like.

The monomer or oligomer may be used alone or in combination, but it is preferable to use a trifunctional or higher functional monomer or polyfunctional oligomer.

In the active energy ray-curable composition, the content of the active energy ray-curable resin is in the range of 5 to 90 mass% with respect to 100 mass% of the total solid content of the composition, preferably 5 to 80 mass% The range of mass% is more preferable.

As the low refractive index inorganic particles, inorganic particles such as silica and magnesium fluoride are preferable. These inorganic particles are preferably hollow and porous. The refractive index of the inorganic particles is more preferably in the range of 1.2 to 1.35.

In the active energy ray-curable composition, the content of the low refractive index inorganic particles is preferably in the range of 20 to 70 mass%, more preferably 25 to 70 mass%, particularly preferably 30 to 70 mass%, based on 100 mass% of the total solid content of the composition. By mass to 60% by mass.

Examples of the fluorine-containing compound include fluorine-containing monomers, fluorine-containing oligomers and fluorine-containing polymer compounds. Here, the fluorine-containing monomer and fluorine-containing oligomer are monomers or oligomers having an ethylenic unsaturated group and a fluorine atom in the molecule.

Examples of fluorinated monomers and fluorinated oligomers include 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3,3-pentafluoropropyl (meth) acrylate, 2- (Perfluorohexyl) ethyl (meth) acrylate, 2- (perfluorohexyl) ethyl (meth) acrylate, 2- Fluorine-containing (meth) acrylic acid esters such as ethyl (meth) acrylate and? - (perfluorooctyl) ethyl (meth) acrylate, di- Fluoroethyl ethylene glycol, di- (? -Fluoroacrylic acid) -2,2,3,3,3-pentafluoropropylethylene glycol, di- (? -Fluoroacrylic acid) -2,2,3,3 , 4,4,4-heptane fluorobutyl ethylene glycol, di- (? - fluoroacrylic acid) -2,2,3,3,4,4,5,5,5-nonafluoropentyl ethylene glycol, di - (? -fluoroacrylic acid) -2,2,3,3,4,4,5,5,6,6,6-undecafluorohexyl ethylene Glycol, di- (? - fluoroacrylic acid) -2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoroheptylethylene glycol, di- (? -Fluoroacrylic acid) -2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctylethylene glycol, di- (? - fluoro (Acrylic acid) -3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctylethylene glycol, di- (? - fluoroacrylic acid) -2, Di- (? -Fluoroacrylic acid) such as 2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononyl ethylene glycol, Fluoroalkyl esters are exemplified.

As the fluorinated polymer compound, for example, a fluorinated copolymer containing a fluorinated monomer and a monomer for imparting a crosslinkable group as a constitutional unit is exemplified. Specific examples of fluorinated monomer units include fluoroolefins (e.g., fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoroethylene, hexafluoropropylene, perfluoro-2, (E.g., bisquat 6FM (Osaka Yuki Kagaku Co., Ltd.) or M-2020 (manufactured by Daikin Industries, Ltd.)), or a partially fluorinated alkyl ester derivative of (meth) acrylic acid , Fully or partially fluorinated vinyl ethers, and the like. Examples of the monomer for imparting a crosslinkable group include a (meth) acrylate monomer having a carboxyl group, a hydroxyl group, an amino group, a sulfonic acid group and the like, as well as a (meth) acrylate monomer having a crosslinkable functional group in advance in the molecule such as glycidyl methacrylate (Meth) acrylic acid, methylol (meth) acrylate, hydroxyalkyl (meth) acrylate, allylacrylate and the like).

In the active energy ray-curable composition, the content of the fluorine-containing compound is preferably 30 mass% or more, more preferably 50 mass% or more, and particularly preferably 60 mass% or more, based on 100 mass% of the total solid content of the composition. The upper limit is preferably 100 mass% or less, more preferably 99 mass% or less, and particularly preferably 98 mass% or less.

The active energy ray curable composition may utilize the above fluorinated monomers and / or fluorinated oligomers as all or part of the active energy ray curable resin.

The active energy ray curable composition preferably comprises a photopolymerization initiator. Specific examples of such photopolymerization initiators include, for example, acetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, p-dimethylaminopropiophenone, benzophenone, 2-chlorobenzophenone, Benzyl benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, methyl benzoyl formate, p-isopropyl ether, methyl isobutyl ketone, methyl isobutyl ketone, carbonyl compounds such as? -hydroxyisobutylphenone,? -hydroxyisobutylphenone, 2,2-dimethoxy-2-phenylacetophenone and 1-hydroxycyclohexylphenylketone, tetramethylthiurammonosulfur Feed, sulfur compounds such as tetramethylthiuram disulfide, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone and the like. These photopolymerization initiators may be used alone or in combination of two or more.

The content of the photopolymerization initiator is suitably in the range of 0.1 to 10 mass%, preferably 0.5 to 8 mass%, based on 100 mass% of the total solid content of the composition.

The active energy ray-curable composition preferably contains a polysiloxane compound having an ethylenic unsaturated group in order to improve slidability and scratch resistance of the surface of the low refractive index layer.

The polysiloxane compound having an ethylenically unsaturated group is a compound having at least one ethylenic unsaturated group in either the terminal or side chain of the polysiloxane main chain in the molecule. Examples of the ethylenic unsaturated group include a vinyl group, an allyl group, an acryloyl group, a methacryloyl group, an acryloyloxy group, and a methacryloyloxy group. The number of ethylenic unsaturated groups in the polysiloxane compound having an ethylenic unsaturated group is preferably in the range of 1 to 6. As the polysiloxane compound having an ethylenic unsaturated group, a polydimethylsiloxane compound having an ethylenic unsaturated group is preferable.

Examples of the polysiloxane compound having an ethylenically unsaturated group include compounds of Production Examples 1-1 to 1-3 of JP-A-2009-84327 or silylplane FM-0711, FM-0721, X-22-174DX, X-22-2426, X-22-2404, X-22-164A, X-22-164C, and X-22-164C of Shin-Etsu Chemical Co., Commercially available products such as BY16-152D, BY16-152 and BY16-152C manufactured by Toray Dow Corning Co., Ltd. can be used.

The content of the ethylenically unsaturated group-containing polysiloxane compound is preferably in the range of 0.5% by mass or more and less than 10% by mass, more preferably in the range of 1% by mass or more and less than 8% by mass, based on 100% by mass of the total solid content of the active energy ray- By mass, more preferably from 1.3% by mass to less than 6% by mass, particularly preferably from 1.5% by mass to less than 5% by mass.

As described above, when the adhesive layer contains particles and the low refractive index layer contains a polysiloxane compound having an ethylenic unsaturated group, the slidability of the surface of the low refractive index layer is further improved, and blocking resistance in a production process is improved .

Further, when the low refractive index layer is a layer formed by applying the active energy ray-curable resin composition by the wet coating method, the oligomer precipitation from the base film can be suppressed.

As described above, when a polyethylene terephthalate film is used as the base film, an oligomer (cyclic trimer), which is a non-cross-linking component, may be precipitated on the surface of the polyethylene terephthalate film when the film is subjected to heat treatment in a film formation process of a transparent conductive film . This oligomer precipitation can be suppressed by laminating the adhesive layer (the adhesive layer containing at least the resin and the crosslinking agent) and the low refractive index layer (the low refractive index layer formed by coating the active energy ray curable resin composition by the wet coating method) have.

From the viewpoint of suppressing oligomer precipitation, the thickness of the low refractive index layer is preferably 80 nm or more, more preferably 90 nm or more.

In the transparent conductive film of the present invention, the luminous reflectance on the low refractive index layer side is preferably 1.0% or less, more preferably 0.9% or less, particularly preferably 0.8% or less, most preferably 0.7% or less. If the luminous reflectance of the transparent conductive film on the side of the low refractive index layer is larger than 1.0%, the transmittance of light emission from the display panel is lowered and the display quality of the display device is deteriorated.

[Transparent conductive film]

As a material of the transparent conductive film, a known material used for an electrode of a touch panel can be used. Examples thereof include metal oxides such as tin oxide, indium oxide, antimony oxide, zinc oxide, indium tin oxide (ITO) and antimony tin oxide (ATO), metal nanowires such as silver nanowires and carbon nanotubes. Of these, ITO is preferably used.

The thickness of the transparent conductive film is preferably not less than 10 nm, more preferably not less than 15 nm, particularly preferably not less than 20 nm, from the viewpoint of securing good conductivity, for example, a surface resistance value of 10 ³ Ω / Do. On the other hand, if the thickness of the transparent conductive film is excessively large, the suppression effect of the skeletal visibility phenomenon may be reduced and the transparency may be deteriorated. Therefore, the upper limit of the thickness of the transparent conductive film is preferably 100 nm or less, More preferably 50 nm or less, and particularly preferably 40 nm or less.

The method of forming the transparent conductive film is not particularly limited, and conventionally known methods can be used. Specifically, for example, a dry process such as a vacuum evaporation process, a sputtering process, an ion plating process, or a wet coating process (specifically, the above-described process) can be used.

The transparent conductive film thus formed may be patterned. The patterning can form various patterns according to the application to which the transparent conductive film is applied. Further, the pattern portion and the non-pattern portion are formed in accordance with the patterning of the transparent conductive film, but the shape of the pattern portion may be, for example, a stripe shape, a lattice shape, or a combination pattern thereof.

The patterning of the transparent conductive film is generally performed by etching. For example, the transparent conductive film is patterned by forming an etching resist film of a pattern shape on the transparent conductive film by a photolithography method, a laser exposure method, or a printing method, and then performing an etching treatment.

As the etching solution, conventionally known ones may be used. For example, inorganic acids such as hydrogen chloride, hydrogen bromide, sulfuric acid, nitric acid, and phosphoric acid, organic acids such as acetic acid, and mixtures thereof, and aqueous solutions thereof are used.

[Other functional layer]

It is preferable to form another functional layer between the base film and the transparent conductive film. As the other functional layers, the adhesive layer, the hard coat layer, the high refractive index layer, the low refractive index layer and the like are exemplified, and these functional layers can be formed singly or in combination.

As this adhesive layer to be formed between the base film and the transparent conductive film, the same adhesive layer as described above can be used. In particular, this adhesive layer having a refractive index in the range of 1.55 to 1.60 is preferable. The thickness is preferably in the range of 10 to 200 nm.

The hard coat layer is preferably a layer obtained by coating the active energy ray hardening composition containing the active energy ray-curable resin by the wet coating method. The refractive index of the hard coat layer is suitably in the range of 1.48 to 1.55, preferably in the range of 1.50 to 1.53.

The high refractive index layer is formed of a metal oxide fine particle having a refractive index of 1.65 or more (titanium oxide, zirconium oxide, zinc oxide, tin oxide, antimony oxide, cerium oxide, iron oxide, zinc antimonate, tin oxide dodeposide (ITO), antimony doped tin oxide ATO), indium tin oxide, aluminum-doped zinc oxide, gallium-doped zinc oxide, fluorine-doped tin oxide, etc.) and the aforementioned active energy ray-curable resin are coated by a wet coating method and cured Layer.

The refractive index n1 of the high refractive index layer is preferably in the range of 1.61 to 1.80, more preferably in the range of 1.63 to 1.75. The thickness d1 of the high refractive index layer is preferably in the range of 30 to 100 nm, more preferably in the range of 40 to 95 nm.

As the low refractive index layer, the same materials as those of the above-described low refractive index layer can be used. Further, an SiO ₂ film (formed by vapor deposition) is also preferably used as the low refractive index layer. The refractive index n2 of the low refractive index layer is preferably in the range of 1.30 to 1.50, more preferably in the range of 1.33 to 1.48. The thickness d2 of the low refractive index layer is more preferably in the range of 5 to 70 nm, more preferably in the range of 7 to 50 nm, and particularly preferably in the range of 10 to 45 nm.

In particular, it is preferable to form a high refractive index layer and a low refractive index layer between the base film and the transparent conductive film. By forming the high refractive index layer and the low refractive index layer, it is possible to correct the problem of the reflection color or the transmission color due to the hue of the transparent conductive film of the transparent conductive film. In this case, the sum of the optical thickness of the high refractive index layer and the optical thickness of the low refractive index layer is preferably? / 4.

Here, the optical thickness is a product of a refractive index and a thickness, and? Is a wavelength range of a visible light region of 380 to 780 nm. The unit of thickness is nm.

That is, the sum of the optical thickness of the high refractive index layer and the optical thickness of the low refractive index layer preferably satisfies the following relational expression (4).

(380 nm / 4)? (N1 x d1) + (n2 x d2)? (780 nm / 4)

95 nm? (N1 x d1) + (n2 x d2)? 195 nm (4)

As described above, at least one layer selected from the group consisting of a hard coat layer, a high refractive index layer, and a low refractive index layer, which is a layer formed by applying an active energy ray curable composition by a wet coating method between a base film and a transparent conductive film, The oligomer precipitation from the base film can be prevented.

[Touch panel and display device]

The transparent conductive film of the present invention is preferably used for a touch panel such as a resistive film type or capacitive type. Particularly, it is preferably used in capacitive touch panels.

The resistance film type touch panel is generally configured such that the transparent conductive films of the two transparent conductive films face each other through the spacers.

1 is a schematic cross-sectional view of an example of a display device having a resistive film touch panel using the transparent conductive film of the present invention. Fig. 1 shows a mode in which the transparent conductive film 11 of the present invention is used as a lower electrode. The touch panel 21 is constituted by the transparent conductive film 12 constituting the upper electrode and the transparent conductive film 11 constituting the lower electrode and the touch panel 21 is constituted of the air layer 9 on the display panel 31, Respectively.

The touch panel 21 has a transparent conductive film 2 on one side of the base film 1 and a low refractive index layer 4 on the other side of the base film 1 through the adhesive layer 3, A transparent conductive film 6 having a transparent conductive film 6 on one side of the base film 5 and a functional layer 7 on the other side of the base film 5, The transparent conductive film 2 and the transparent conductive film 6 are arranged so as to face each other through the spacer 8. An air layer 9 is present on the side of the low refractive index layer 4 of the transparent conductive film 11 of the present invention.

The presence of the air layer 9 increases the reflectance at the interface with the transparent conductive film 11, thereby lowering the transmittance of the light emitted from the display panel and lowering the display quality (brightness and visibility) as a display device. However, by using the transparent conductive film of the present invention, the interface reflection is reduced, and good display quality can be ensured.

As the display panel 31, a liquid crystal display panel or an organic EL display panel is exemplified. As the functional layer of the transparent conductive film 12, a hard coat layer, an antiglare layer, an antireflection layer, an antifouling layer and the like are used.

2 and 3 are schematic sectional views of an example of a display device having a capacitive touch panel using the transparent conductive film of the present invention.

2 is a schematic cross-sectional view of a display device including a capacitive touch panel in which an X electrode and a Y electrode are disposed through an air layer. The X electrode is constituted by the transparent conductive film 13 of the present invention and the Y electrode is constituted by the transparent conductive film 14 of the present invention and the two transparent conductive films 13 and 14 are formed through the air layer 9 So that the touch panel 22 is formed. The touch panel 22 is disposed on the display panel 31 through the air layer 9.

The transparent conductive films 13 and 14 of the present invention constituting the X electrode and the Y electrode have the transparent conductive film 2 on one side of the base film 1 and the transparent conductive film 2 on the other side of the base film 1, And has only one low-refractive index layer (4) through the adhesive layer (3). The X electrode and the Y electrode are formed by patterning the transparent conductive film 2, respectively.

Each of the low refractive index layers (4) of the transparent conductive films (13, 14) of the present invention is in contact with the air layer (9).

In Fig. 2, the transparent conductive films 13 and 14 may be bonded by a pressure-sensitive adhesive layer (not shown). In this case, the transparent conductive film 13 does not necessarily use the transparent conductive film of the present invention because the low refractive index layer does not contact the air layer.

3 is a schematic cross-sectional view of a display device including a capacitive touch panel using a transparent conductive film having an X electrode and a Y electrode formed on one base film. The transparent conductive film 2 of the transparent conductive film 15 of the present invention has a structure in which a patterned transparent conductive film to be an X electrode and a patterned transparent conductive film to be a Y electrode are laminated through an insulating film.

The transparent conductive film 15 of the present invention serving as the touch panel 23 is disposed on the display panel 31 through the air layer 9. The low refractive index layer 4 of the transparent conductive film 15 of the present invention, Is in contact with the air layer (9).

2 and 3, a protective panel (such as a glass plate or an acrylic resin plate) not shown on the touch surface side is disposed through an air layer or a pressure sensitive adhesive layer (not shown).

As described above, when the touch panel using the transparent conductive film of the present invention is mounted on the display panel, it is preferable that the low refractive index layer side of the transparent conductive film of the present invention is arranged to face the display panel through the air layer .

As described above, the transparent conductive film of the present invention is preferably mounted inside the touch surface of the display device having the touch panel, not inside the touch surface. The transparent conductive film of the present invention is used in a display device to make it possible to have only one layer of the low refractive index layer (no hard coat layer or high refractive index layer) in view of scratch resistance.

Another example of the transparent conductive film of the present invention is an electromagnetic wave shielding member that shields electromagnetic waves generated from a liquid crystal display panel. That is, the transparent conductive film of the present invention is suitable for an electromagnetic wave shielding member.

4 is a schematic sectional view of an example of a display device having an electromagnetic wave shielding member using the transparent conductive film of the present invention.

4, the transparent conductive film 16 of the present invention serving as the electromagnetic wave shielding member 24 is disposed on the display panel (liquid crystal display panel) 31 through the air layer 9, and the transparent conductive film 16 The low refractive index layer 4 of the film 16 is in contact with the air layer 9. The transparent conductive film 16 of the present invention has the transparent conductive film 2 on one side of the base film 1 and the low refractive index layer 4 on the other side of the base film 1 ) Is only one layer.

4, the touch panel 25 is disposed on the transparent conductive film 2 side of the transparent conductive film 16 of the present invention which becomes the electromagnetic wave shielding member 24. Here, the touch panel 25 is not particularly limited, and a touch panel (for example, an ultrasonic method, an electromagnetic induction method, etc.) other than the above-described resistive film type or capacitive type can be used. A resistive film type touch panel or a capacitance type touch panel using the transparent conductive film of the present invention as described above is also preferably used.

Example

Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. The measurement method and the evaluation method in this embodiment are shown below.

(1) Measurement of refractive index of base film

The refractive index of the base film (PET film) was measured with an Abbe's refractometer according to JIS K7105 (1981).

(2) Measurement of the refractive index of the adhesive layer and the low refractive index layer

 Each coating composition of the adhesive layer and the low refractive index layer was coated on a silicon wafer coated with a spin coater (dry thickness: about 2 mu m) under a temperature condition of 25 DEG C using a phase difference measuring apparatus (NPDM -1000) to measure the refractive index of 633 nm.

(3) The thickness of the adhesive layer

The cross-section of the base film on which the adhesive layer was laminated was cut into ultra-thin pieces, and the cross-sectional structure was observed with the naked eye by TEM (transmission electron microscope) by staining with RuO ₄ dye, OsO ₄ dye, The thickness of the adhesive layer is measured from the cross-sectional photograph. In addition, five portions were measured, and the average value was taken as the thickness of this adhesive layer.

Measurement apparatus: Transparent electron microscope (H-7100FA type, manufactured by Hitachi)

Measurement conditions: acceleration voltage 100 kV

· Sample adjustment:

· Magnification: 300,000 times

(4) Measurement of the thickness of the low refractive index layer

The cross section of the sample was cut into ultra-thin slices and observed with a transmission electron microscope (H-7100FA type, Hitachi, Ltd.) at an acceleration voltage of 100 kV (observed at a magnification of 100,000), and the thickness of the low refractive index layer was measured from the cross-sectional photograph. Further, five portions were measured, and the average value was determined as the thickness of the low refractive index layer.

(5) Measurement of luminous reflectance of transparent conductive film

<Preparation of sample for evaluation>

The surface of the sample opposite to the side where the low refractive index layer was laminated was attached to a glass plate with an adhesive, and a black tape (Nitto Denko No.21 Torque (BC)) is attached to produce an evaluation sample.

<Measurement>

(Single-sided reflection) at a wavelength of 380 to 780 nm at an incident angle of 5 degrees from the measurement plane using a spectrophotometer (Shimadzu Seisakusho Co., Ltd., UV3150PC) to obtain a luminous reflectance (reflectance of the reflection specified in JIS Z8701-1999 The stimulus value Y) was obtained. The spectroscopic solid angle is measured by a spectrophotometer, and the reflectance (one-sided light reflection) is calculated in accordance with JIS Z8701-1999. The calculation formula is as follows.

T = K? S (?) Y (?) R (?) D? (Where the integral period is 380 to 780 nm)

T: single-sided light reflectance

S (?): Distribution of standard light used for color display

y (?): Isochromatic function in the XYZ indicator

R (?): Spectral solid angle reflectance

&Lt; Aim of luminous reflectance >

In the display device provided with the touch panel using the transparent conductive film of the present invention, in order not to lower the transmittance of the light emitted from the display panel, the luminous reflectance of the transparent conductive film on the low refractive index layer side is preferably 1.0% Or less, more preferably 0.8% or less. When the luminous reflectance is larger than 1.0%, the transmittance is lowered.

(6) Adhesiveness

Each sample was allowed to stand in an atmosphere of 60 ° C-90% RH for 500 hours, 100 cross-cuts of 1 mm 2 were put on the thin film layer side of each sample, a cellophane tape made by Nichiban Co., Ltd. was attached thereon, Pressed tightly and then rapidly peeled off in the direction of 90 degrees, and the adhesiveness was evaluated according to the following number according to the remaining number.

○: 90/100 (remaining quantity / number of measurement) or more

×: less than 90/100 (remaining quantity / number of measurements)

(7) Slipperiness

Each sample was cut into two sheet pieces (20 cm x 15 cm). Two sheets of sheet pieces are stacked so that the two sheet pieces are slightly shifted and laid on a smooth pedestal so that the low refractive index layer faces are opposed to each other and the lower sheet piece is fixed on the pedestal with a finger so that the upper sheet piece is slid by hand (Good or bad) judgment of slip property. The measurement environment is 23 캜, 55% RH.

A: Good slipperiness of the upper sheet member.

DELTA: Sliding property of the upper sheet member is lower, but relatively good.

X: The upper sheet section does not slip.

(8) Measurement of the average particle diameter of the particles contained in the adhesive layer

 The surface of the adhesive layer was observed at a magnification of 10,000 times using an SEM (scanning electron microscope), and the image of the particles (density of light generated by the particles) was bonded to an image analyzer (for example, QTM900 manufactured by Cambridge Instruments) And the data were collected. When the total number of particles became 5,000 or more, the following numerical processing was carried out, and the number-average diameter d obtained thereby was regarded as an average particle diameter (diameter).

· D = Σdi / N

Where di is the equivalent circle diameter of the particle (the diameter of the circle having the same area as the cross-sectional area of the particle), and N is the number.

(9) Evaluation of oligomer precipitation inhibiting effect

Each sample was left in an oven at 140 캜 and subjected to heat treatment for 80 minutes. The haze value before and after the heat treatment was measured using a turbidity meter NDH2000 manufactured by Nippon Denshoku Kogyo Co., Ltd. according to JIS K 7105 (1981). Based on the change in haze value before and after the heat treatment, the oligomer precipitation inhibiting effect was evaluated based on the following criteria.

○: Change in haze value before and after heat treatment is less than 0.5%

?: Change in haze value before and after heat treatment is 0.5% or more and less than 1.0%

X: Change in haze value before and after heat treatment is 1.0% or more

(A resin for forming the adhesive layer)

&Lt; Polyester resins 1 and 2 >

The water dispersible polyester resin 1 having a refractive index of 1.64 and the water dispersible polyester resin 2 having a refractive index of 1.62 were prepared by adjusting the fluorene ring content in the polyester resin. Namely, in the synthesis of the fluorene ring-containing polyester resin, the compositional ratio x mol% of 9,9-bis [4- (2-hydroxyethoxy) phenyl] fluorene is in the range of 35 mol% to 45 mol% And the polyester resin 1 and the polyester resin 2 were obtained.

&Lt; Fluorene ring-containing polyester resin >

And a copolymer composition of the following carboxylic acid component and glycol component.

· Carboxylic acid component

40 mol%

5-Na sulfoisophthalic acid 10 mol%

· Glycol component

X 9 mol% of 9,9-bis [4- (2-hydroxyethoxy) phenyl] fluorene;

Ethylene glycol (50-x) mol%

&Lt; Polyester resin 3 >

A water-dispersible polyester resin 3 (naphthalene ring-containing polyester resin) having the following refractive index of 1.58 was prepared.

&Lt; Naphthalene ring-containing polyester resin &

And a copolymer composition of the following carboxylic acid component and glycol component.

· Carboxylic acid component

Terephthalic acid 35 mol%

9 mol% of 2,6-naphthalene dicarboxylic acid

6 mol% of 5-Na sulfoisophthalic acid

· Glycol component

Ethylene glycol 49 mol%

1 mol% of diethylene glycol

<Acrylic resin 1, 2>

A water-dispersible acrylic resin 1 having a refractive index of 1.54 and a water-dispersible acrylic resin 2 having a refractive index of 1.52 were prepared.

<Acrylic resin 1>

Is an acrylic resin having the following copolymerization composition.

Copolymer component

Methyl methacrylate 64 wt%

Ethyl acrylate 30 wt%

5% by weight of acrylic acid

N-methylol acrylamide 1 wt%

<Acrylic resin 2>

Is an acrylic resin having the following copolymerization composition.

Copolymer component

Methyl methacrylate 63 wt%

35% by weight of ethyl acrylate

1% by weight of acrylic acid

N-methylol acrylamide 1 wt%

(Particles contained in this adhesive layer)

Particle A; Colloidal silica having an average particle diameter of 190 nm

Particle B; Colloidal silica having an average particle diameter of 80 nm

Particle C; Colloidal silica having an average particle diameter of 30 nm

[Production Example 1]

The following adhesive layer A was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 so as to have a dry thickness of 90 nm to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.64. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), the following adhesive layer Z was laminated so that the dry thickness was 90 nm.

<Adhesive Layer A>

100 parts by mass of a polyester resin 1 having a refractive index of 1.64, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A. The content of each component is a content by solid content conversion, and the same applies to the following examples.

The melamine-based cross-linking agent is a methylol-based melamine-based cross-linking agent ("Knorak MW12LF" manufactured by Sanwa Chemical Co., Ltd.). In the following Examples and Comparative Examples, the melamine-based cross-

<Adhesive layer Z>

100 parts by mass of a polyester resin 3 having a refractive index of 1.58, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A. [

[Production Example 2]

The following adhesive layer B was laminated on one side (low refractive index layer laminated side) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 20 nm, and the refractive index of the adhesive layer was 1.64. This adhesive layer satisfies Condition 1 and Condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

&Lt; Adhesive layer B &

100 parts by mass of a polyester resin 1 having a refractive index of 1.64, 5 parts by mass of a melamine crosslinking agent and 2 parts by mass of a particle B are contained.

[Production Example 3]

The following adhesive layer C was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.62. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

&Lt; Adhesive layer C &

100 parts by mass of a polyester resin 2 having a refractive index of 1.62, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A. [

[Production Example 4]

The following adhesive layer D was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with adhesive layer obtained above was 30 nm, and the refractive index of the adhesive layer was 1.62. This adhesive layer satisfies Condition 1 and Condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer D>

100 parts by mass of a polyester resin 2 having a refractive index of 1.62, 5 parts by mass of a melamine crosslinking agent and 2 parts by mass of a particle B are contained.

[Production Example 5]

The following adhesive layer E was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.58. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer E>

100 parts by mass of a polyester resin 3 having a refractive index of 1.58, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A. [

[Production Example 6]

The following adhesive layer F was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 40 nm, and the refractive index of the adhesive layer was 1.58. This adhesive layer satisfies Condition 1 and Condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive layer F>

100 parts by mass of a polyester resin 3 having a refractive index of 1.58, 5 parts by mass of a melamine crosslinking agent and 2 parts by mass of a particle B are contained.

[Production Example 7]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 6 except that the thickness of the adhesive layer F of Production Example 6 was changed to 20 nm.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 20 nm, and the refractive index of the adhesive layer was 1.58. This adhesive layer satisfies Condition 1 and Condition 2.

[Production Example 8]

The following adhesive layer G was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.54. This adhesive layer does not satisfy either condition 1 or condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer G>

100 parts by mass of an acrylic resin 1 having a refractive index of 1.54, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A are contained.

[Production Example 9]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 8, except that the thickness of the adhesive layer G in Production Example 8 was changed to 60 nm.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 60 nm, and the refractive index of the adhesive layer was 1.54. This adhesive layer does not satisfy either condition 1 or condition 2.

[Production Example 10]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 8, except that the thickness of the adhesive layer G in Production Example 8 was changed to 40 nm.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 40 nm, and the refractive index of the adhesive layer was 1.54. Satisfies this adhesive layer condition 2.

[Production Example 11]

The following adhesive layer E was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.52. This adhesive layer does not satisfy either condition 1 or condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer H>

100 parts by mass of an acrylic resin 2 having a refractive index of 1.52, 5 parts by mass of a melamine crosslinking agent, and 2 parts by mass of a particle A.

[Production Example 12]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 11, except that the thickness of the adhesive layer H in Production Example 11 was changed to 60 nm.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 60 nm, and the refractive index of the adhesive layer was 1.52. This adhesive layer does not satisfy either condition 1 or condition 2.

[Production Example 13]

The following adhesive layer I was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 so as to have a dry thickness of 20 nm to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 20 nm, and the refractive index of the adhesive layer was 1.52. This adhesive layer satisfies Condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer I>

100 parts by mass of an acrylic resin 2 having a refractive index of 1.52, 5 parts by mass of a melamine crosslinking agent and 2 parts by mass of a particle B are contained.

[Production Example 14]

The following adhesive layer J was laminated on one side (low refractive index layer laminated side) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.52. This adhesive layer does not satisfy either condition 1 or condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer J>

100 parts by mass of an acrylic resin 2 having a refractive index of 1.52, 5 parts by mass of a melamine crosslinking agent and 2 parts by mass of a particle C are contained.

[Production Example 15]

The following adhesive layer K was laminated on one side (low refractive index layer laminated side) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a dry film thickness of 90 nm to obtain a PET film with the adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.52. This adhesive layer does not satisfy either condition 1 or condition 2.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive layer K>

100 parts by mass of acrylic resin 2 having a refractive index of 1.52 and 5 parts by mass of a melamine crosslinking agent. This adhesive layer F is the adhesive layer not containing particles.

[Production Example 16]

A PET film (refractive index: 1.65, thickness: 100 m) on which the adhesive layer was not laminated was prepared.

[Manufacturing Example 17-1]

The following adhesive layer L was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.60. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer L>

100 parts by mass of the polyester resin 3, 20 parts by mass of zirconium oxide (average particle diameter of 20 nm), 15 parts by mass of a melamine crosslinking agent, and 1 part by mass of the particles A are contained.

[Manufacturing Example 17-2]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 17-1, except that the dry thickness of the adhesive layer L was changed to 120 nm in Production Example 17-1.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 120 nm, and the refractive index of the adhesive layer was 1.60. This adhesive layer satisfies the condition 1.

[Manufacturing Example 17-3]

A PET film with an adhesive layer was obtained in the same manner as in Production Example 17-1, except that the dry thickness of the adhesive layer L was changed to 120 nm in Production Example 17-1.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 150 nm, and the refractive index of the adhesive layer was 1.60. This adhesive layer satisfies the condition 1.

[Production Example 18]

The following adhesive layer L was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.65. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive layer M>

100 parts by mass of polyester resin 3, 60 parts by mass of zirconium oxide (average particle diameter of 20 nm), 15 parts by mass of a melamine crosslinking agent, and 1 part by mass of a particle A are contained.

[Production Example 19]

The following adhesive layer L was laminated on one side (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 占 퐉 to obtain a PET film with an adhesive layer.

The thickness of the adhesive layer of the PET film with an adhesive layer obtained above was 90 nm, and the refractive index of the adhesive layer was 1.66. This adhesive layer satisfies the condition 1.

On the other side of the PET film (on the side where the transparent conductive film was laminated), this adhesive layer Z was laminated so as to have a dry thickness of 90 nm as in Production Example 1.

<Adhesive Layer N>

100 parts by mass of polyester resin 3, 67 parts by mass of zirconium oxide (average particle diameter of 20 nm), 15 parts by mass of a melamine crosslinking agent, and 1 part by mass of a particle A.

[Production Example 20]

A high refractive index layer of the following active energy ray-curable (ultraviolet curable) layer was formed on one surface (low refractive index layer laminated surface) of a polyethylene terephthalate film (PET film) having a refractive index of 1.65 and a thickness of 100 탆, And irradiated with ultraviolet rays to obtain a high refractive index layer laminated PET film.

The thickness of the high refractive index layer of the high refractive index layer laminated PET film obtained above was 90 nm, and the refractive index of the high refractive index layer was 1.65.

The adhesive layer Z was laminated on the other side of the PET film (on the side where the transparent conductive film was laminated) so as to have a dry thickness of 90 nm as in Production Example 1. [

&Lt; High refractive index layer &

100 parts by mass of dipentaerythritol hexaacrylate as an active energy ray curable resin, 100 parts by mass of zirconium oxide (average particle diameter of 20 nm) and 100 parts by mass of a photopolymerization initiator (manufactured by Ciba Specialty Chemicals Co., ) 184 &quot;). &Lt; / RTI &gt;

[Examples 1 to 33 and Comparative Examples 1 to 25]

The transparent conductive films of Examples 1 to 33 and Comparative Examples 1 to 25 were prepared in the following manner.

The low refractive index layer A, the low refractive index layer B, the low refractive index layer C, or the low refractive index layer C was formed on the surface of one of the adhesive layers (the adhesive layer on the low refractive index layer lamination side) of the adhesive layer- A low refractive index layer D was formed. Further, a low refractive index layer C was formed on the high refractive index layer of the high refractive index layer laminated PET film obtained in Production Example 20.

Tables 1 to 3 show combinations of the PET film with adhesive layer and the low refractive index layer.

On the other side of the adhesive layer (the adhesive layer on the transparent conductive layer side) of the adhesive film-attached PET film, the following hard coat layer, high refractive index layer, SiO ₂ And a transparent conductive film were laminated in this order to prepare a transparent conductive film.

<Low Refractive Index Layer A>

47 parts by mass of an active energy ray curable resin (containing dipentaerythritol hexaacrylate and urethane acrylate in a ratio of 1: 3), and 50 parts by mass of hollow silica (ELECOM-P5024, manufactured by Nikkiso Co., , 3 parts by mass of a polysiloxane compound having an ethylenic unsaturated group (&quot; X-22-164C &quot;, manufactured by Shin-Etsu Chemical Co., Ltd.) and 1 part by mass of a photopolymerization initiator (&quot; Ilgacure (registered trademark) 184 &quot;) were dispersed or dissolved in an organic solvent to prepare an active energy ray curable composition composition. The refractive index of this composition was 1.35.

This composition was applied by a wet coating method (gravure coating method), dried at 90 占 폚 and irradiated with ultraviolet rays of 400 mJ / cm2 to form a low refractive index layer. The thickness of the low refractive index layer (thickness after curing) was changed between 70 nm, 90 nm, 100 nm, 110 nm and 130 nm as shown in Tables 1 to 3.

&Lt; Low Refractive Index Layer B &

59 parts by mass of active energy ray-curable resin (containing dipentaerythritol hexaacrylate and urethane acrylate in a mass ratio of 1: 3), 38 parts by mass of hollow silica (ELECOM-P5024 manufactured by Nikkiso Co., , 3 parts by mass of a polysiloxane compound having an ethylenic unsaturated group ("X-22-164C" manufactured by Shin-Etsu Chemical Co., Ltd.), and 3 parts by mass of a photopolymerization initiator "Ilgacure (registered trademark) 184 ) Was dispersed or dissolved in an organic solvent to prepare an active energy ray curable composition composition. The refractive index of this composition was 1.38.

This composition was applied by a wet coating method (gravure coating method), dried at 90 占 폚 and irradiated with ultraviolet rays of 400 mJ / cm2 to form a low refractive index layer. The thickness of the low refractive index layer (thickness after curing) was changed between 90 nm, 100 nm and 110 nm as shown in Tables 1 to 3.

<Low Refractive Index Layer C>

67 parts by mass of an active energy ray curable resin (containing dipentaerythritol hexaacrylate and urethane acrylate in a mass ratio of 1: 3), 30 parts by mass of hollow silica (ELECOM-P5024, manufactured by Nikkiso Co., , 3 parts by mass of a polysiloxane compound having an ethylenic unsaturated group ("X-22-164C", manufactured by Shin-Etsu Chemical Co., Ltd.) and 1 part by mass of a photopolymerization initiator ("Ilgacure (registered trademark) 184" ) Was dispersed or dissolved in an organic solvent to prepare an active energy ray curable composition composition. The refractive index of this composition was 1.40.

This composition was applied by a wet coating method (gravure coating method), dried at 90 占 폚 and irradiated with ultraviolet rays of 400 mJ / cm2 to be cured to form a low refractive index layer having a thickness of 100 nm.

&Lt; Low Refractive Index Layer D &

82 parts by mass of an active energy ray curable resin (containing dipentaerythritol hexaacrylate and urethane acrylate in a mass ratio of 1: 3) and 15 parts by mass of hollow silica (ELECOM-P5024, manufactured by Nikkiso Co., And 3 parts by mass of a photopolymerization initiator ("IGACURE (registered trademark) 184" manufactured by Ciba Specialty Chemicals Co., Ltd.) were dispersed or dissolved in an organic solvent to prepare an active energy ray curable composition composition. The refractive index of this composition was 1.43.

This composition was applied by a wet coating method (gravure coating method), dried at 90 占 폚, and cured by irradiation with ultraviolet rays of 400 mJ / cm2 to form a low refractive index layer having a thickness of 100 nm.

<Hard coat layer>

, 95 parts by mass of an active energy ray curable resin (containing dipentaerythritol hexaacrylate and urethane acrylate in a mass ratio of 1: 3), 5 parts by mass of a photopolymerization initiator ("Ilgacure (registered trademark) 184" By mass was prepared. The refractive index of this composition was 1.50.

This composition was applied by a wet coating method (gravure coating method), dried at 90 占 폚 and irradiated with ultraviolet rays of 400 mJ / cm2 to form a hard coat layer having a thickness of 2 占 퐉.

&Lt; High refractive index layer &

, 37 parts by mass of an active energy ray curable resin (10 parts by mass of dipentaerythritol hexaacrylate and 27 parts by mass of urethane acrylate), 60 parts by mass of zirconium oxide (average particle diameter of 20 nm) and 60 parts by mass of a photopolymerization initiator (Ciba Specialty Chemicals ) &Quot; IGACURE (registered trademark) 184 &quot;) were dispersed or dissolved in an organic solvent. The refractive index of this composition was 1.70.

This composition was coated by a wet coating method (gravure coating method), dried at 90 占 폚 and irradiated with ultraviolet rays of 400 mJ / cm2 to form a high refractive index layer having a thickness of 80 nm.

<SiO ₂ film>

An SiO ₂ film (refractive index: 1.46) was laminated by a sputtering method so as to have a thickness of 10 nm.

&Lt; Transparent conductive film &

The ITO film was laminated by a sputtering method so as to have a thickness of 30 nm and patterned (etched) to form a transparent conductive film.

[Evaluation of transparent conductive film]

The transparent conductive films of the examples and comparative examples obtained above were evaluated for luminous reflectance, adhesion, and slipperiness. The results are shown in Tables 1 to 3.

From the results of Tables 1 to 3, it can be seen that the embodiment of the present invention has a small luminous reflectance and a good adhesion and slippery property of the low refractive index layer.

This adhesive layer of this adhesive layer PET film used in Comparative Examples 1 to 6 and Comparative Example 8 and Comparative Example 9 did not satisfy any of Condition 1 and Condition 2, and thus the luminous reflectance was large.

The adhesive layer of the adhesive layer PET film of Comparative Example 5 contained particles but the ratio (r / d) of the average particle diameter r of the particles to the thickness d of the adhesive layer was less than 0.5, The castle is falling. The adhesive layer of this adhesive layer PET film of Comparative Example 6 contained no particles and thus had a poor slidability. In Comparative Example 7 using the PET film having no adhesive layer, adhesiveness and slipperiness were poor.

In Comparative Examples 10 to 14 and Comparative Example 15 and Comparative Example 16, the refractive index of the low refractive index layer exceeds 1.42 and the luminous reflectance is large. In addition, since the low refractive index layer D of Comparative Examples 10 to 14 and Comparative Example 15 and Comparative Example 16 does not contain the polysiloxane compound having an ethylenic unsaturated group, the refractive index of the low refractive index layers A, B and C Slipperiness is falling.

In addition, the adhesive layer of this adhesive layer PET film of Comparative Example 14 uses a low refractive index layer D that does not contain particles and does not contain a polysiloxane compound having an ethylenic unsaturated group, so that the slidability is low. From these results, it can be seen that good slipperiness is obtained by including the polysiloxane compound in which the adhesive layer contains particles of an appropriate size and the low refractive index layer has an ethylenic unsaturated group.

In Comparative Examples 17 to 20, since the thickness of the low refractive index layer is less than 80 nm, the luminous reflectance is increased and the effect of suppressing oligomer precipitation is also deteriorated.

In Comparative Examples 21 to 24, since the thickness of the low refractive index layer exceeds 120 nm, the luminous reflectance becomes large.

In Comparative Example 25, instead of this adhesive layer, a high refractive index layer having an active energy ray curability was formed, but adhesion with the base film was poor.

1, 5: base film
2, 6: transparent conductive film
3:
4: Low refractive index layer
7: functional layer
8: Spacer
9: air layer
11, 13, 14, 15, 16: The transparent conductive film
12: transparent conductive film
21, 22, 23, 25: Touch panel
24: Electromagnetic wave shield member
31: Display panel

Claims (16)

Wherein the base film has a transparent conductive film on one side of a base film having a refractive index of 1.6 to 1.7 and a low refractive index layer having a refractive index of 1.42 or less and a thickness of 80 to 120 nm through the adhesive layer on the other side of the base film,
Wherein the adhesive layer contains at least one of a polyester resin having a condensed aromatic ring in a molecule as a high refractive index material and zirconium oxide and titanium oxide,
Wherein the adhesive layer further contains silica particles,
The ratio (r / d) of the average particle diameter (r) of the silica particles to the thickness (d) of the adhesive layer is 1.3 to 20,
Wherein the adhesive layer has a refractive index of 1.60 to 1.66, and further satisfies the following condition (1).
Condition 1; The absolute value of the difference between the refractive index of the base film and the refractive index of the adhesive layer is 0.05 or less. The method according to claim 1,
Wherein the polyester resin having a condensed aromatic ring in the molecule is a polyester resin having at least one of a naphthalene ring and a fluorene ring in the molecule. The method according to claim 1,
Wherein the adhesive layer is a layer in which zirconium oxide or titanium oxide is dispersed in a polyester resin having a condensed aromatic ring in the molecule. delete The method according to claim 1,
Wherein the adhesive layer has a thickness of 5 nm or more and less than 200 nm. The method according to claim 1,
Wherein the base film is a polyester film. The method according to claim 6,
Wherein the polyester film is a polyethylene terephthalate film. The method according to claim 1,
Wherein the adhesive layer further contains a crosslinking agent. 9. The method of claim 8,
Wherein the crosslinking agent is at least one member selected from the group consisting of a melamine crosslinking agent, an oxazoline crosslinking agent, a carbodiimide crosslinking agent, an isocyanate crosslinking agent and an aziridine crosslinking agent. The method according to claim 1,
Wherein the low refractive index layer is a layer obtained by applying an active energy ray curable resin composition by a wet coating method and curing the layer. delete delete The method according to claim 1,
Wherein the low refractive index layer contains a polysiloxane compound having an ethylenic unsaturated group. A touch panel comprising the transparent conductive film according to claim 1. A display device in which a touch panel is disposed on a display panel using the transparent conductive film according to claim 1, wherein the low refractive index layer side of the transparent conductive film is arranged to face the display panel through an air layer . A display device in which an electromagnetic wave shielding member using the transparent conductive film according to claim 1 is disposed on a display panel, characterized in that the low refractive index layer side of the transparent conductive film is arranged to face the display panel through an air layer Device.

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