JP2015184410A - Optically anisotropic hard coat transfer film and manufacturing method thereof, and touch panel and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: an optically anisotropic hard coat transfer film which has excellent scratch resistance and small thickness and can decrease rainbow unevenness and blackouts in a touch panel-equipped display; a manufacturing method thereof; a touch panel with decreased rainbow unevenness and blackouts; and a manufacturing method thereof.SOLUTION: An optically anisotropic hard coat transfer film comprises, on one surface of a temporary support, at least one hard coat layer and at least one optically anisotropic layer.

Description

  The present invention relates to an optically anisotropic hard coat transfer film and a manufacturing method thereof, and a touch panel and a manufacturing method thereof.

  In recent years, image display devices (for example, portable information terminals and mobile phones) equipped with a touch panel capable of inputting information by touching a display screen are rapidly spreading. Reducing the thickness of the touch panel display is a recent development trend.

  Patent Document 1 is a hard coat layer transfer sheet obtained by laminating at least a hard coat layer and an adhesive layer in this order on a substrate, and the hard coat layer uses silica provided with a photosensitive group. A hard coat layer transfer sheet comprising an acrylic-silica hybrid resin and containing a silane coupling agent in the adhesive layer is described.

  Patent Document 2 describes an elliptically polarizing plate in which a translucent protective film, an optical anisotropic element composed of a liquid crystal layer, a polarizing element, and a translucent protective film are laminated in this order, In particular, it is described that a λ / 4 retardation plate is used as an optical anisotropic element.

JP 2011-83912 A JP 2009-186659 A

As mentioned above, it is required to reduce the thickness of the touch panel display, but if the thickness of the hard coat film for protecting the touch sensor is reduced, wrinkles are likely to occur during processing and bonding. is there.
In addition, with the rapid spread of touch panel-mounted displays such as smartphones, tablets, in-vehicle car navigation systems, and vending machines, outdoor use is increasing. For this reason, there are increasing opportunities to observe touch panel mounted displays while wearing sunglasses with polarization characteristics, and the problem of rainbow unevenness where interference colors appear and the problem of blackout where the image becomes black depending on the viewing angle have recently attracted attention. ing.

Patent Document 1 described above proposes a method for transferring a hard coat layer formed on a temporary support, but has a problem that the blackout problem cannot be solved. Moreover, although patent document 2 reduces the problem of a rainbow nonuniformity and blackout, it cannot provide scratch resistance.
The present invention should solve the problem of providing an optically anisotropic hard coat transfer film having excellent scratch resistance, thin thickness, and capable of reducing rainbow unevenness and blackout in a touch panel mounted display, and a method for producing the same. It was an issue. Furthermore, this invention made it the subject which should be solved to provide the touchscreen which reduced the rainbow nonuniformity and blackout, and its manufacturing method.

As a result of intensive studies to solve the above problems, the present inventors have used an optically anisotropic hardcoat transfer film having a hardcoat layer and an optically anisotropic layer on one surface of a temporary support. Has found that it is excellent in scratch resistance and can reduce rainbow unevenness and blackout in a display equipped with a touch panel, and has completed the present invention.
Specifically, the present invention has the following configuration.

<1> An optically anisotropic hard coat transfer film having at least one hard coat layer and at least one optical anisotropic layer on one surface of the temporary support.
<2> The optically anisotropic hard coat transfer film according to <1>, wherein the in-plane retardation Re of the optically anisotropic layer at a wavelength of 550 nm is 40 to 240 nm;
However, when the refractive index in the in-plane slow axis direction of the optical anisotropic layer is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the in-plane direction Retardation Re = (nx−ny) × d.
<3> The optically anisotropic hard coat transfer film according to <1> or <2>, wherein the temporary support, the hard coat layer, and the optically anisotropic layer are laminated in this order.
<4> The optically anisotropic hard coat transfer film according to any one of <1> to <3>, wherein the temporary support and the hard coat layer are laminated adjacent to each other.
<5> At least one orientation layer is provided between the temporary support and the optically anisotropic layer, and the orientation layer and the optically anisotropic layer are laminated adjacent to each other, <1> to <4> The optically anisotropic hard coat transfer film according to any one of the above.
<6> The optically anisotropic hardcoat transfer film according to <5>, wherein the temporary support, the hardcoat layer, the alignment layer, and the optically anisotropic layer are laminated adjacent to each other in this order.
<7> The optically anisotropic hard coat transfer film according to any one of <1> to <6>, having an adhesive layer on the outermost surface opposite to the temporary support.
<8> The optically anisotropic hard according to any one of <1> to <7>, comprising a step of applying a hard coat layer coating solution and an optical anisotropic layer coating solution on a temporary support. A method for producing a coat transfer film.
<9> A touch panel having at least one hard coat layer, at least one optically anisotropic layer, an adhesive layer, and a touch sensor, and having a 40 degree retardation Re40 of 0 to 1000 nm at a wavelength of 550 nm of the touch sensor;
Retardation Re40 represents the average value of retardation Re when the touch sensor is tilted ± 40 degrees with respect to the normal direction in the plane with the in-plane slow axis as the rotation axis, and the surface of the optical anisotropic layer When the refractive index in the inner slow axis direction is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the retardation in the in-plane direction Re = (nx−ny) Xd.
<10> The touch panel according to <9>, wherein the in-plane retardation Re of the optically anisotropic layer at a wavelength of 550 nm is 40 to 240 nm;
However, when the refractive index in the in-plane slow axis direction of the optical anisotropic layer is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the in-plane direction Retardation Re = (nx−ny) × d.
<11> The touch panel according to <9> or <10>, wherein the touch sensor, the optically anisotropic layer, and the hard coat layer are laminated in this order.
<12> The touch panel according to any one of <9> to <11>, wherein the hard coat layer is an outermost surface layer.
<13> Any one of <9> to <12>, wherein the optical anisotropic layer has at least one alignment layer on the side opposite to the touch sensor side, and the alignment layer and the optical anisotropic layer are laminated adjacent to each other. The touch panel as described in Crab.
<14> The touch panel according to <13>, wherein the touch sensor, the adhesive layer, the optically anisotropic layer, the alignment layer, and the hard coat layer are laminated adjacent to each other in this order.
<15> The method according to any one of <9> to <14>, which is produced by transferring the optically anisotropic hard coat transfer film according to any one of <1> to <7> on a touch panel. Touch panel.
<16> A step of forming an adhesive layer on the outermost surface opposite to the temporary support side of the optically anisotropic hard coat transfer film according to any one of <1> to <6>, and a hard coat via the adhesive layer A method for manufacturing a touch panel, comprising: a step of transferring a transfer film to a touch sensor; and a step of peeling a temporary support.
<17> A method for producing a touch panel, comprising a step of transferring the optically anisotropic hard coat transfer film according to <7> to a touch sensor and a step of peeling the temporary support.

  ADVANTAGE OF THE INVENTION According to this invention, the optically anisotropic hard coat transfer film which is excellent in damage resistance, is thin, and can reduce the rainbow nonuniformity and blackout in a touch panel mounting display, and its manufacturing method are provided. Furthermore, according to this invention, the touchscreen which reduced the rainbow nonuniformity and the blackout, and its manufacturing method are provided.

It is sectional drawing which shows an example of the optically anisotropic hard coat transfer film of this invention. It is sectional drawing which shows another example of the optically anisotropic hard coat transfer film of this invention. It is sectional drawing which shows another example of the optically anisotropic hard coat transfer film of this invention. It is sectional drawing which shows another example of the optically anisotropic hard coat transfer film of this invention. It is sectional drawing which shows an example of the touchscreen of this invention. It is sectional drawing of embodiment of the touchscreen of this invention. It is sectional drawing of other embodiment of the touchscreen of this invention. It is a top view which shows one Embodiment of a touch sensor. It is sectional drawing cut | disconnected along the cutting line AA shown in FIG. It is an enlarged plan view of a 1st detection electrode. It is the schematic which shows the relationship between a polar angle and an azimuth.

Hereinafter, the present invention will be described in detail. The description of the constituent elements described below may be made based on representative embodiments and specific examples, but the present invention is not limited to such embodiments. In the present specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
Re represents retardation in the in-plane direction, and Re40 represents retardation in the 40 degree direction. More specifically, the retardation in the direction of 40 degrees is an average value of retardation when the sample is inclined ± 40 degrees with respect to the normal direction in the plane with the in-plane slow axis as the rotation axis. . Re and Re40 can be measured by making light incident in the normal direction of the film in KOBRA 21ADH or WR (manufactured by Oji Scientific Instruments).
Further, in this specification, an angle (for example, an angle such as “90 °”) and a relationship thereof (for example, “orthogonal”, “parallel”, etc.) are within an allowable error range in the technical field to which the present invention belongs. Shall be included. At this time, the allowable error means, for example, that it is within a range of a strict angle ± 5 ° or less, and the error from the strict angle is preferably 3 ° or less. More specifically, orthogonal means 90 ° ± 5 °, and parallel means 0 ° ± 5 °.

(Optically anisotropic hard coat transfer film)
The optically anisotropic hard coat transfer film of the present invention has at least one hard coat layer and at least one optical anisotropic layer on one surface of the temporary support.
The optically anisotropic hard coat transfer film of the present invention has excellent scratch resistance by having a hard coat layer, and can reduce rainbow unevenness and blackout in a touch panel mounted display by having an optical anisotropic layer. .
Further, in the optically anisotropic hard coat transfer film of the present invention, the optically anisotropic transfer film and the hard coat can be obtained by forming a hard coat layer and an optically anisotropic layer on one temporary support. The transfer process can be reduced once compared to the case where each transfer film is bonded. Here, the optically anisotropic transfer film refers to a transfer film having a temporary support and an optically anisotropic layer, and the hard coat transfer film refers to a transfer film having a temporary support and a hard coat layer.
In the present invention, the adhesive layer between the hard coat layer and the optically anisotropic layer, which is necessary when laminating the optically anisotropic transfer film and the hardcoat transfer film, respectively, is not necessarily required and can be omitted. is there. In that case, there is an advantage that the optical anisotropic layer is less likely to break compared to the case where the hard coat layer and the optical anisotropic layer are laminated via the adhesive layer, and the optical anisotropic hard coat transfer film described above The thickness of the touch panel manufactured using can be made thinner.
In the optically anisotropic hard coat transfer film of the present invention, the hard coat layer and the optical anisotropic layer are preferably formed by coating, whereby the hard coat layer and the optical anisotropic layer can be adhered to each other.
In addition, even if the adhesiveness of a hard-coat layer and an optically anisotropic layer is formed between the hard-coat layer and an optically anisotropic layer, the adhesive thin layer distinguished from the said adhesive layer is formed, and adhesiveness is improved. Good. The thin layer can be formed by coating.

  The hardness of the optically anisotropic hard coat transfer film is preferably H or higher, more preferably 2H or higher, in a pencil hardness test according to JIS K-5600-5-4. Having such hardness is useful for touch panel applications.

  The upper limit of the thickness of the optically anisotropic hard coat transfer film excluding the temporary support and the adhesive layer is not particularly limited, but is preferably less than 40 μm from the viewpoint of the need to reduce the thickness of the touch panel display. The lower limit of the thickness is preferably 0.5 μm or more, more preferably 5 μm or more, because if the thickness is too thin, the film tends to break when peeled from the temporary support.

The optically anisotropic hard coat transfer film of the present invention may have other layers between the temporary support, the hard coat layer, and the optically anisotropic layer. Examples of other layers include an alignment layer.
Hereinafter, each layer constituting the optically anisotropic hard coat transfer film will be described.

<Temporary support>
The optically anisotropic hard coat transfer film of the present invention has a temporary support. The temporary support used in the present invention may be transparent or opaque and is not particularly limited. Examples of polymers constituting the temporary support include cellulose esters (eg, cellulose acetate, cellulose propionate, cellulose butyrate), polyolefins (eg, polyethylene, polypropylene), cyclic olefins (eg, norbornene-based polymers, norbornene-based). Copolymer), poly (meth) acrylic acid esters (eg, polymethyl methacrylate), polycarbonate, polyester and polysulfone. For the purpose of inspecting optical properties in the production process, the transparent support is preferably a transparent and low birefringent material, and cellulose ester and cyclic olefin are preferred from the viewpoint of low birefringence. Arton (manufactured by JSR Co., Ltd.), Zeonex, Zeonore (manufactured by Nippon Zeon Co., Ltd.), TOPAS (manufactured by Polyplastics Co., Ltd.) and the like can be used as commercially available norbornene polymers. Inexpensive polycarbonate, polyethylene terephthalate, and the like are also preferably used.
Although the thickness of a temporary support body is not specifically limited, Generally, they are 10 micrometers-1000 micrometers, Preferably they are 10 micrometers-200 micrometers.

<Hard coat layer>
The optically anisotropic hard coat transfer film of the present invention has at least one hard coat layer on a temporary support. The hard coat layer is for imparting scratch resistance. The hard coat layer may be either the first aspect or the second aspect described below.

<< First Aspect >>
The hard coat layer of the first embodiment is formed using a composition for hard coat layer containing an ionizing radiation curable resin which is a resin curable by ultraviolet rays and a photopolymerization initiator.

  Examples of the ionizing radiation curable resin include a compound having a reactive group such as one or more unsaturated bonds such as a compound having an acrylate functional group. In the present invention, the hard coat layer is an acrylate. It is preferable from the viewpoint of improving the adhesion between the optically anisotropic layer and the hard coat layer after wet heat aging. Examples of the compound having one unsaturated bond include ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone and the like. Examples of the compound having two or more unsaturated bonds include polymethylolpropane tri (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (Meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and the like and ethylene oxide ( A polyfunctional compound modified with EEO) or the like, or a reaction product such as (meth) acrylate with the polyfunctional compound (for example, poly (meth) acrylate ester of polyhydric alcohol) It can gel. In the present specification, “(meth) acrylate” refers to methacrylate and acrylate. Preferred compounds as the acrylate include compounds having 3 or more unsaturated bonds. When such a compound is used, the crosslink density of the hard coat layer to be formed can be increased, and the hardness can be improved. Specifically, in the present invention, pentaerythritol triacrylate, pentaerythritol tetraacrylate, polyester polyfunctional acrylate oligomer (3 to 15 functional), urethane polyfunctional acrylate oligomer (3 to 15 functional) and the like are used in appropriate combination. Preferred examples of commercially available products include A-DPH and A-TMMT (both manufactured by Shin-Nakamura Chemical Co., Ltd.).

  In addition to the above compounds, polyester resins, polyether resins, acrylic resins, epoxy resins having a relatively low molecular weight (number average molecular weight 300 to 80,000, preferably 400 to 5000) having reactive groups such as unsaturated double bonds. Urethane resin, alkyd resin, spiroacetal resin, polybutadiene resin, polythiol polyene resin, and the like can also be used as the ionizing radiation curable resin. The resin in this case includes all dimers, oligomers, and polymers other than monomers.

  The ionizing radiation curable resin should be used in combination with a solvent-drying resin (such as a thermoplastic resin that can be used as a coating only by drying the solvent added to adjust the solid content during coating). You can also. By using the solvent-drying resin in combination, film defects on the coated surface can be effectively prevented. The solvent dry resin that can be used in combination with the ionizing radiation curable resin is not particularly limited, and a thermoplastic resin can be generally used.

  The thermoplastic resin is not particularly limited. For example, styrene resin, (meth) acrylic resin, vinyl acetate resin, vinyl ether resin, halogen-containing resin, alicyclic olefin resin, polycarbonate resin, polyester resin. And polyamide resins, cellulose derivatives, silicone resins and rubbers or elastomers. The thermoplastic resin is preferably amorphous and soluble in an organic solvent (particularly a common solvent capable of dissolving a plurality of polymers and curable compounds). In particular, from the viewpoints of film forming properties, transparency, and weather resistance, styrene resins, (meth) acrylic resins, alicyclic olefin resins, polyester resins, cellulose derivatives (cellulose esters, etc.) and the like are preferable. As a commercial item, acrylic base MH-101-5 (made by Fujikura Kasei Co., Ltd.) etc. are mentioned, for example.

  Moreover, the composition for hard-coat layers may contain the thermosetting resin. The thermosetting resin is not particularly limited. For example, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin , Silicon resin, polysiloxane resin and the like.

  The photopolymerization initiator is not particularly limited and known ones can be used. For example, specific examples of the photopolymerization initiator include acetophenones, benzophenones, Michler benzoylbenzoate, α-amyloxime ester. Thioxanthones, propiophenones, benzyls, benzoins, acylphosphine oxides and the like. In addition, it is preferable to use a mixture of photosensitizers, and specific examples thereof include n-butylamine, triethylamine, poly-n-butylphosphine, and the like.

  As the photopolymerization initiator, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, etc. may be used alone or in combination when the ionizing radiation curable resin is a resin system having a radical polymerizable unsaturated group. Is preferred. When the ionizing radiation curable resin is a resin system having a cationic polymerizable functional group, the photopolymerization initiator may be an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoin sulfonate ester. Etc. are preferably used alone or as a mixture.

  As the photopolymerization initiator, in the case of an ionizing radiation curable resin having a radical polymerizable unsaturated group, 1-hydroxy-cyclohexyl-phenyl-ketone commercially available as IRGACURE 184 (manufactured by BASF) is an ionizing radiation curable resin. It is preferable for the reason that it is compatible with and less yellowing.

The content of the photopolymerization initiator in the hard coat layer composition is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin. By setting it to 1 part by mass or more, the hard coat layer can have a desired hardness, and by setting it to 10 parts by mass or less, ionizing radiation reaches the deep part of the coated film and internal curing is promoted. The
The minimum with more preferable content of a photoinitiator is 2 mass parts, and a more preferable upper limit is 8 mass parts. When the content of the photopolymerization initiator is in this range, a hardness distribution does not occur in the film thickness direction, and uniform hardness is likely to occur.

The hard coat layer may contain inorganic fine particles having an average particle size of 10 μm or less. The hardness and refractive index of the film are adjusted by the hardness of the fine particles, and the wettability of the hard coat layer surface and the interlayer adhesion with the layer formed on the hard coat layer are controlled by using fine particles modified with a hydrophilic / hydrophobic group. can do. Moreover, the glare-proof function (anti-glare function) can also be provided by containing particles having an average particle size of 0.2 to 10 μm.
Here, the average particle diameter can be obtained from a photograph obtained by observing dispersed particles with a transmission electron microscope. The projected area of the particles is obtained, and the equivalent circle diameter is obtained therefrom, which is taken as the average particle size (average primary particle size). The average particle diameter in this specification can be calculated by measuring the projected area of 300 or more particles and obtaining the equivalent circle diameter.

  Examples of the inorganic fine particles include transparent and insulating metal oxide fine particles because they are used immediately above the transparent conductive film. As a specific example of the metal oxide, it is preferable to use fine particles composed of silica, alumina, zirconia, and titanium, and it is more preferable to use fine silica particles because of easy modification.

  As the silica fine particles, dry powdery silica produced by combustion of silicon tetrachloride can be used, but colloidal silica in which silicon dioxide is dispersed in a solvent is more preferably used. Although not particularly limited, specific examples include Snowtex series manufactured by Nissan Chemical Industries, Ltd. such as MEK-ST, MEK-ST-L, and MEK-ST-XL.

  Various surfactants may be added to the hard coat layer from the viewpoint of further improving coatability. As the surfactant, various surfactants such as a fluorine-based surfactant, a nonionic surfactant, a cationic surfactant, an anionic surfactant, and a silicone-based surfactant can be used.

  Examples of the fluorosurfactant include Megafac F171, F172, F173, F176, F176, F177, F141, F142, F143, F144, R30, F437, F475, F479, F482, F554, F780, F780, F781 (above DIC Corporation), Florard FC430, FC431, FC171 (above, Sumitomo 3M Limited), Surflon S-382, SC-101, Same SC-103, Same SC-104, Same SC-105, Same SC1068, Same SC-381, Same SC-383, Same S393, Same KH-40 (manufactured by Asahi Glass Co., Ltd.), PF636, PF656, PF6320 PF6520, PF7002 (manufactured by OMNOVA), and the like.

  Specific examples of nonionic surfactants include glycerol, trimethylolpropane, trimethylolethane, and ethoxylates and propoxylates thereof (for example, glycerol propoxylate, glycerin ethoxylate, etc.), polyoxyethylene lauryl ether, polyoxyethylene Stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene nonylphenyl ether, polyethylene glycol dilaurate, polyethylene glycol distearate, sorbitan fatty acid ester (Pluronic L10, L31, L61, L62 manufactured by BASF, 10R5, 17R2, 25R2, Tetronic 304, 701, 704, 901, 904, 150R1, Pi Nin D-6512, D-6414, D-6112, D-6115, D-6120, D-6131, D-6108-W, D-6112-W, D-6115-W, D-6115-X, D -6120-X (manufactured by Takemoto Yushi Co., Ltd.), Solsperse 20000 (manufactured by Nippon Lubrizol Co., Ltd.), NAROACTY CL-95, HN-100 (manufactured by Sanyo Chemical Industries, Ltd.) and the like.

  Specific examples of the cationic surfactant include phthalocyanine derivatives (trade name: EFKA-745, manufactured by Morishita Sangyo Co., Ltd.), organosiloxane polymer KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), (meth) acrylic acid ( Co) polymer polyflow no. 75, no. 90, no. 95 (manufactured by Kyoeisha Chemical Co., Ltd.), W001 (manufactured by Yusho Co., Ltd.) and the like.

  Specific examples of the anionic surfactant include W004, W005, W017 (manufactured by Yusho Co., Ltd.), sanded BL (manufactured by Sanyo Chemical Industries, Ltd.), and the like.

Examples of the silicone surfactant include “Toray Silicone DC3PA”, “Toray Silicone SH7PA”, “Tore Silicone DC11PA”, “Tore Silicone SH21PA”, “Tore Silicone SH28PA”, “Toray Silicone” manufactured by Toray Dow Corning Co., Ltd. “Silicone SH29PA”, “Toresilicone SH30PA”, “Toresilicone SH8400”, “TSF-4440”, “TSF-4300”, “TSF-4445”, “TSF-4460”, “TSF” manufactured by Momentive Performance Materials, Inc. -4552 "," KP341 "," KF6001 "," KF6002 "manufactured by Shin-Etsu Silicone Co., Ltd.," BYK307 "," BYK323 "," BYK330 "manufactured by Big Chemie.
Only one type of surfactant may be used, or two or more types may be combined.
The addition amount of the surfactant is preferably 0.001% by mass to 2.0% by mass, and more preferably 0.005% by mass to 1.0% by mass with respect to the total mass of the aqueous composition.

<< Second Aspect >>
The hard coat layer of the second aspect includes an epoxy group-containing alkoxysilane, an epoxy group-free alkoxysilane, and a metal complex. By adopting this hard coat layer, a hard coat with high alkali resistance is used. A layer can be obtained. Since the hard coat layer formed using the composition of the second aspect has high alkali resistance, even when the hard coat layer is immersed in an alkaline solution, it is possible to suppress the dissolution of the hard coat layer as much as possible. Can do. Thereby, the haze value of a hard-coat layer does not raise before and after alkali treatment, and the hard-coat layer excellent in the optical characteristic can be obtained.

  In the second embodiment, an epoxy group-containing alkoxysilane and an epoxy group-free alkoxysilane are included. These alkoxysilanes are preferably water-soluble or water-dispersible materials. The use of a water-soluble or water-dispersible material is particularly preferable from the viewpoint of reducing environmental pollution caused by VOC (volatile organic compounds).

  The epoxy group-containing alkoxysilane and the epoxy group-free alkoxysilane each have a hydrolyzable group. Silanol is generated by hydrolyzing the hydrolyzable group in an acidic aqueous solution, and an oligomer is generated by condensation between the silanols. In the aqueous composition of the present invention, a part of the epoxy group-containing alkoxysilane and the epoxy group-free alkoxysilane may be hydrolyzed.

  The ratio of the epoxy group-containing alkoxysilane to the total alkoxysilane composed of the epoxy group-containing alkoxysilane and the epoxy group-free alkoxysilane may be 20 to 85% by mass, and the lower limit is 25% by mass or more. Is preferable, and it is more preferable that it is 30 mass% or more. Moreover, as an upper limit, it is preferable that it is 80 mass% or less, and it is more preferable that it is 75 mass% or less. By setting the proportion of the epoxy group-containing alkoxysilane in the above range relative to the total alkoxysilane, the stability of the hard coat layer forming composition can be improved, and further, a hard coat layer having strong alkali resistance is formed. be able to.

  The epoxy group-containing alkoxysilane is an alkoxysilane having an epoxy group. Any epoxy group-containing alkoxysilane may be used as long as it has one or more epoxy groups in one molecule, and the number of epoxy groups is not particularly limited. In addition to the epoxy group, the epoxy group-containing alkoxysilane may further have a group such as an alkyl group, an amide group, a urethane group, a urea group, an ester group, a hydroxy group, or a carboxyl group.

  Examples of the epoxy group-containing alkoxysilane used in the present invention include 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, and 2- (3,4-epoxy. Cyclohexyl) ethyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3- Examples thereof include glycidoxypropyltriethoxysilane. Examples of commercially available products include KBE-403 (manufactured by Shin-Etsu Chemical Co., Ltd.).

  The epoxy group-free alkoxysilane is an alkoxysilane having no epoxy group. The epoxy group-free alkoxysilane may be an alkoxysilane having no epoxy group, and may have a group such as an alkyl group, an amide group, a urethane group, a urea group, an ester group, a hydroxy group, or a carboxyl group. good.

  The epoxy group-free alkoxysilane is preferably a tetraalkoxysilane or trialkoxysilane, or a mixture thereof. It is preferably a mixture of tetraalkoxysilane or trialkoxysilane, and contains a mixture of tetraalkoxysilane and trialkoxysilane, so that when a hard coat layer is formed, while having appropriate flexibility, Sufficient hardness can be obtained.

  When the epoxy group-free alkoxysilane is a mixture of tetraalkoxysilane and trialkoxysilane, the molar ratio of tetraalkoxysilane and trialkoxysilane is preferably 25:75 to 85:15, and 30:70 to 80:20 is more preferable, and 30:70 to 65:35 is even more preferable. By setting the molar ratio within the above range, it becomes easy to control the degree of polymerization of the alkoxysilane within a desired range and to control the hydrolysis rate and the solubility of the aluminum chelate.

  Tetraalkoxysilane is a tetrafunctional alkoxysilane, more preferably having 1 to 4 carbon atoms in each alkoxy group. Of these, tetramethoxysilane and tetraethoxysilane are particularly preferably used. By setting the number of carbon atoms to 4 or less, the hydrolysis rate of tetraalkoxysilane when mixed with acidic water does not become too slow, and the time required for dissolution until a uniform aqueous solution is shortened. Thereby, the manufacturing efficiency at the time of manufacturing a hard-coat layer can be improved. Examples of commercially available products include KBE-04 (manufactured by Shin-Etsu Chemical Co., Ltd.).

The trialkoxysilane is a trifunctional alkoxysilane represented by the following general formula (1).
RSi (OR ¹ ) ₃ (1)
Here, R is an organic group having 1 to 15 carbon atoms not containing an amino group, and R ¹ is an alkyl group having 4 or less carbon atoms such as methyl and ethyl groups.

  The trifunctional alkoxysilane represented by the general formula (1) does not contain an amino group as a functional group. That is, this trifunctional alkoxysilane has an organic group R having no amino group. When R has an amino group, if it is mixed with a tetrafunctional alkoxysilane and hydrolyzed, dehydration condensation is promoted between the produced silanols. For this reason, an aqueous composition becomes unstable and is not preferable.

  R in the general formula (1) may be an organic group having a molecular chain length that has 1 to 15 carbon atoms. By setting the number of carbon atoms to 15 or less, the flexibility when the hard coat layer is formed is not excessively increased, and sufficient hardness can be obtained. By setting the carbon number of R within the above range, a hard coat layer with improved brittleness can be obtained. Moreover, the adhesiveness of other films, such as a support body, and a hard-coat layer can be improved.

  Furthermore, the organic group represented by R may have a heteroatom such as oxygen, nitrogen, or sulfur. When the organic group has a hetero atom, the adhesion with other films can be further improved.

  As trialkoxysilane, vinyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-chloropropyltrimethoxysilane, 3-ureidopropyltrimethoxysilane, propyltrimethoxysilane, Phenyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltriethoxysilane, 3-chloropropyltriethoxysilane, 3-ureidopropyltriethoxysilane, methyltriethoxysilane, methyl Trimethoxysilane, ethyltriethoxysilane, ethyltrimethoxysilane, propyltriethoxysilane, propyltrimethoxysilane, phenyltriethoxysilane, phenol It can be exemplified Le trimethoxysilane. Of these, methyltriethoxysilane and methyltrimethoxysilane are particularly preferably used. Examples of commercially available products include KBE-13 (manufactured by Shin-Etsu Chemical Co., Ltd.).

  The hard coat layer of the second aspect includes a metal complex (curing agent). As the metal complex, a metal complex composed of Al, Mg, Mn, Ti, Cu, Co, Zn, Hf and Zr is preferable, and these can be used in combination.

  These metal complexes can be easily obtained by reacting a metal alkoxide with a chelating agent. Examples of chelating agents include β-diketones such as acetylacetone, benzoylacetone and dibenzoylmethane, β-keto acid esters such as ethyl acetoacetate and ethyl benzoylacetate.

  Preferable specific examples of the metal complex include ethyl acetoacetate aluminum diisopropylate, aluminum tris (ethyl acetoacetate), alkyl acetoacetate aluminum diisopropylate, aluminum monoacetyl acetate bis (ethyl acetoacetate), aluminum tris (acetyl) Magnesium chelate compounds such as ethyl acetoacetate magnesium monoisopropylate, magnesium bis (ethylacetoacetate), alkyl acetoacetate magnesium monoisopropylate, magnesium bis (acetylacetonate), zirconium tetraacetylacetate Narate, zirconium tributoxyacetylacetonate, zirconium acetate Le acetonate bis (ethyl acetoacetate), manganese acetylacetonate, cobalt acetylacetonate, copper acetylacetonate, titanium acetylacetonate and titanium oxy acetylacetonate. Of these, aluminum tris (acetylacetonate), aluminum tris (ethylacetoacetate), magnesium bis (acetylacetonate), magnesium bis (ethylacetoacetate), and zirconium tetraacetylacetonate are preferred, and storage stability Considering availability, aluminum tris (acetylacetonate) and aluminum tris (ethylacetoacetate), which are aluminum chelate complexes, are particularly preferable. Examples of commercially available products include aluminum chelate A (W), aluminum chelate D, aluminum chelate M (manufactured by Kawaken Fine Chemical Co., Ltd.), and the like.

The ratio for which a metal complex accounts with respect to an epoxy-group-containing alkoxysilane is 17-70 mol%. The proportion of the metal complex may be 17% mol or more, and more preferably 20 mol% or more. Moreover, the content rate of a metal complex should just be 70 mol% or less, it is preferable that it is 65 mol% or less, and it is more preferable that it is 60 mol% or less.
In the present invention, when the metal complex is contained in the above lower limit value or more, excellent alkali resistance can be obtained when the hard coat layer is formed. Moreover, by setting it as the said upper limit or less, the dispersibility in aqueous solution can be made favorable, and manufacturing cost can be suppressed.

  The hard coat layer of the second aspect preferably further contains inorganic fine particles. When inorganic fine particles are further included, 0 <x ≦ 80, where x is the ratio (unit: mass%) of the inorganic fine particles to the total solid content contained in the aqueous composition. x is preferably 1 or more, and more preferably 3 or more. Moreover, x should just be 80 or less, it is preferable that it is 70 or less, and it is more preferable that it is 65 or less. By setting the proportion of the inorganic fine particles in the aqueous composition within the above range, higher alkali resistance can be obtained when the hard coat layer is formed.

  The ratio (unit: mass%) of the epoxy group-containing alkoxysilane to the total alkoxysilane is x, where x is the ratio (unit: mass%) of the inorganic fine particles to the total solid content in the aqueous composition. When y, y ≧ x−5 is preferable. Furthermore, it is more preferable that y ≧ x. By setting the relationship between y and x in the above range, higher alkali resistance can be obtained, and a change in haze value when immersed in an alkaline solution can be suppressed. Furthermore, the stability of the hard coat layer coating solution can be enhanced.

  Examples of the inorganic fine particles include transparent and insulating metal oxide fine particles because they are used immediately below the transparent conductive film. As a specific example of the metal oxide, it is preferable to use fine particles made of silica, alumina, zirconia, and titanium. In particular, it is preferable to use fine silica particles from the viewpoint of crosslinking with alkoxysilane.

As the silica fine particles, dry powdery silica produced by combustion of silicon tetrachloride can be used, but colloidal silica in which silicon dioxide or a hydrate thereof is dispersed in water is more preferable. Specific examples include, but are not limited to, Snowtex series manufactured by Nissan Chemical Industries, Ltd. such as Snowtex 033 and Snowtex OL. The average particle diameter of colloidal silica is 3 nm to 50 nm, preferably 4 nm to 50 nm, more preferably 4 nm to 40 nm, and particularly preferably 5 nm to 35 nm.
Here, the average particle diameter can be obtained from a photograph obtained by observing dispersed particles with a transmission electron microscope. The projected area of the particles is obtained, and the equivalent circle diameter is obtained therefrom, which is taken as the average particle size (average primary particle size). The average particle diameter in this specification can be calculated by measuring the projected area of 300 or more particles and obtaining the equivalent circle diameter.

  In addition, as for colloidal silica, it is more preferable that pH at the time of adding in an aqueous composition is adjusted to the range of 2-7. When this pH is 2 to 7, the stability of silanol, which is a hydrolyzate of alkoxysilane, is better than when it is less than 2 or greater than 7, and the dehydration condensation reaction of this silanol proceeds faster. It is possible to suppress an increase in the viscosity of the coating liquid due to this.

  In the hard coat layer of the second embodiment, the same surfactant as in the case of the hard coat layer of the first embodiment is added for the purpose of improving the smoothness of the hard coat layer and reducing the friction on the coating film surface. May be. Further, the hard coat layer may be colored by dispersing pigments, dyes, and other fine particles. Furthermore, for the purpose of improving weather resistance, an ultraviolet absorber, an antioxidant, or the like may be added, or an acid (a 1% by weight aqueous solution of industrial acetic acid (manufactured by Daicel Chemical Industries)) may be added.

<< Scratch resistance of hard coat layer >>
The film thickness of the hard coat layer can be appropriately designed depending on the application. The film thickness of the hard coat layer is preferably 0.2 to 10 μm, more preferably 0.5 to 7 μm.
The thickness of the hard coat layer can be controlled by adjusting the coating amount of the hard coat layer coating solution.
The hardness of the hard coat layer is preferably H or more, more preferably 2H or more, and most preferably 3H or more in a pencil hardness test according to JIS K-5400.

<Optical anisotropic layer>
The optically anisotropic hard coat transfer film of the present invention has at least one optically anisotropic layer on a temporary support.

The material for forming the optically anisotropic layer (the material for forming the optically anisotropic layer) is not particularly limited as long as the material can provide optical anisotropy by coating or the like.
An example of the material for forming an optically anisotropic layer includes a material containing a polymer. The polymer preferably has at least one polymerizable group selected from the group consisting of an acryl group, a methacryl group, a vinyl ether group, an oxetane group, and an epoxy group.
Preferable examples of the material for forming an optically anisotropic layer include a material containing a liquid crystal compound. In particular, the optically anisotropic layer is a layer obtained by applying a solution containing a liquid crystal compound, aging and aligning at the liquid crystal phase formation temperature, and solidifying by irradiation with heat or ionizing radiation in that state. It is preferable. This aspect will be described in detail below.

<< Liquid crystal compound >>
In general, liquid crystal compounds can be classified into a rod-shaped type and a disk-shaped type based on their shapes. In addition, there are low and high molecular types, respectively. Polymer generally refers to a polymer having a degree of polymerization of 100 or more (Polymer Physics / Phase Transition Dynamics, Masao Doi, 2 pages, Iwanami Shoten, 1992). In the present invention, any liquid crystalline compound can be used, but a rod-like liquid crystalline compound is preferably used. Two or more kinds of rod-like liquid crystalline compounds, two or more kinds of disc-like liquid crystalline compounds, or a mixture of a rod-like liquid crystalline compound and a disk-like liquid crystalline compound may be used. Since the temperature change and humidity change can be reduced, it is more preferable to use a liquid crystal compound having a reactive group, and at least one of the two or more reactive groups in one liquid crystal molecule is more preferable. When the liquid crystalline compound is a mixture of two or more, it is preferable that at least one has two or more reactive groups.
The thickness of the optically anisotropic layer is preferably 0.1 to 20 μm, and more preferably 0.5 to 10 μm.

  Examples of rod-like liquid crystalline compounds include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, alkoxy-substituted phenylpyrimidines. , Phenyldioxanes, tolanes and alkenylcyclohexylbenzonitriles are preferably used. Not only the above low-molecular liquid crystalline compounds but also high-molecular liquid crystalline compounds can be used. The polymer liquid crystalline compound is a polymer compound obtained by polymerizing a rod-like liquid crystalline compound having a low molecular reactive group. As the rod-like liquid crystalline compound having a low molecular reactive group that is particularly preferably used, for example, rod-like liquid crystalline compounds described in paragraphs 0045 to 0060 of JP-A-2008-281989 can be mentioned, and the contents thereof are described in this specification. Incorporated into. Specifically, for example, the following rod-like liquid crystal compounds can be used.

  A commercial item can be used for a rod-like liquid crystalline compound, for example, LC-242 (made by BASF), RM-257 (made by MERCK), etc. are mentioned.

  The liquid crystalline compound may be a discotic compound. Examples of discotic compounds include C.I. Destrade et al., Mol. Cryst. 71, 111 (1981), benzene derivatives described in C.I. Destrade et al., Mol. Cryst. 122, 141 (1985), Physicslett, A, 78, 82 (1990); Kohne et al., Angew. Chem. 96, page 70 (1984) and the cyclohexane derivatives described in J. Am. M.M. Lehn et al. Chem. Commun. , 1794 (1985), J. Am. Zhang et al., J. Am. Chem. Soc. 116, page 2655 (1994), and azacrown-based and phenylacetylene-based macrocycles. The above discotic (discotic) compounds generally have a discotic nucleus at the center of the molecule, and groups (L) such as linear alkyl groups, alkoxy groups, and substituted benzoyloxy groups are substituted in a radial pattern. In other words, it has liquid crystallinity and generally includes a so-called discotic liquid crystal. However, when such an aggregate of molecules is uniformly oriented, it exhibits negative uniaxiality, but is not limited to this description. In addition, in the present invention, it is not necessary that the final product is formed from a discotic compound, for example, the low molecular discotic liquid crystal has a group that reacts with heat, light, or the like. As a result, it may be polymerized or cross-linked by reaction with heat, light or the like, resulting in high molecular weight and loss of liquid crystallinity.

  Examples of the discotic liquid crystalline compound used in the present invention include the discotic liquid crystalline compounds described in paragraphs 0061 to 0075 of JP-A-2008-281989, and the contents thereof are incorporated herein.

  When the optically anisotropic layer is formed from a composition containing a liquid crystalline compound, a composition containing a liquid crystalline compound (for example, a coating solution) is applied to the surface of the alignment layer described later, and a desired liquid crystal phase is formed. After the orientation state shown, the orientation state is preferably fixed by heat or ionizing radiation irradiation.

  When a discotic liquid crystalline compound having a reactive group is used as the liquid crystalline compound, it may be fixed in any alignment state of horizontal alignment, vertical alignment, tilt alignment, and twist alignment. Horizontal alignment means that the disk surface of the core of the discotic liquid crystalline compound is parallel to the horizontal plane of the support, but is not strictly required to be parallel. In this specification, the horizontal plane is defined as the horizontal plane. It shall mean an orientation with an inclination angle of less than 10 degrees.

  The optically anisotropic layer may be composed of two or more layers. When two or more layers composed of a liquid crystalline compound are laminated, the combination of the liquid crystalline compounds is not particularly limited, and all of the optically anisotropic layers are composed of discotic liquid crystalline compounds. It may be a laminated body of layers, a laminated body of layers made of a rod-like liquid crystalline compound, a laminated body of a layer made of a discotic liquid crystalline compound and a layer made of a rod-like liquid crystalline compound. The combination of the alignment states of the layers is not particularly limited, and optical anisotropic layers having the same alignment state may be stacked, or layers having different alignment states may be stacked.

  The composition containing a liquid crystal compound is preferably applied as a coating liquid containing the liquid crystal compound and the following polymerization initiator and other additives onto a predetermined alignment layer described later. As the solvent used for preparing the coating liquid, an organic solvent is preferably used. Examples of organic solvents include amides (eg, N, N-dimethylformamide), sulfoxides (eg, dimethyl sulfoxide), heterocyclic compounds (eg, pyridine), hydrocarbons (eg, benzene, hexane), alkyl halides (eg, , Chloroform, dichloromethane), esters (eg, methyl acetate, butyl acetate), ketones (eg, acetone, methyl ethyl ketone, cyclohexanone), ethers (eg, tetrahydrofuran, 1,2-dimethoxyethane). Alkyl halides and ketones are preferred. Two or more organic solvents may be used in combination.

[Fixation of alignment state of liquid crystalline compounds]
The aligned liquid crystalline compound is preferably fixed while maintaining the alignment state. The immobilization is preferably carried out by a polymerization reaction of a reactive group introduced into the liquid crystal compound. The polymerization reaction includes a thermal polymerization reaction using a thermal polymerization initiator and a photopolymerization reaction using a photopolymerization initiator, and a photopolymerization reaction is more preferable. The photopolymerization reaction may be either radical polymerization or cationic polymerization. Examples of radical photopolymerization initiators include α-carbonyl compounds (described in US Pat. Nos. 2,367,661 and 2,367,670), acyloin ethers (described in US Pat. No. 2,448,828), α-hydrocarbon substituted aromatics. Aciloin compound (described in US Pat. No. 2,722,512), polynuclear quinone compound (described in US Pat. Nos. 3,046,127 and 2,951,758), a combination of triarylimidazole dimer and p-aminophenyl ketone (US Pat. No. 3,549,367) Acridine and phenazine compounds (JP-A-60-105667, US Pat. No. 4,239,850) and oxadiazole compounds (US Pat. No. 4,212,970). Examples of commercially available products include IRGACUREOXE02 and IRGACURE819 (both manufactured by BASF).
Examples of cationic photopolymerization initiators include organic sulfonium salt systems, iodonium salt systems, phosphonium salt systems, and the like. Antimonates, phosphates and the like are preferably used as counter ions of these compounds.

The amount of the photopolymerization initiator used is preferably 0.01 to 20% by mass, more preferably 0.5 to 5% by mass, based on the solid content of the coating liquid. Light irradiation for the polymerization of the liquid crystalline compound is preferably performed using ultraviolet rays. Irradiation energy is preferably ^{10mJ / cm 2 ~10J / cm 2} , further preferably 25~800mJ / cm ^2. Illuminance is preferably 10 to 1,000 / cm ^2, more preferably 20 to 500 mW / cm ^2, further preferably 40~350mW / cm ^2. The irradiation wavelength preferably has a peak at 250 to 450 nm, and more preferably has a peak at 300 to 410 nm. In order to accelerate the photopolymerization reaction, light irradiation may be performed under a nitrogen atmosphere or under heating conditions.

[Optical alignment by polarized irradiation]
The optically anisotropic layer may be a layer in which retardation in the in-plane direction is exhibited by photo-alignment by polarized light irradiation. This polarized light irradiation may be performed at the same time as the photopolymerization process in the above-described orientation fixing, or may be further fixed by non-polarized light irradiation after first polarized light irradiation, or fixed first by non-polarized light irradiation. Then, photo-alignment may be performed by irradiation with polarized light. In order to obtain a large retardation in the in-plane direction, the polarized light irradiation is preferably performed first after the application and alignment of the liquid crystal compound layer. The polarized light irradiation is preferably performed in an inert gas atmosphere having an oxygen concentration of 0.5% or less. The irradiation energy is preferably ^{20mJ / cm 2 ~10J / cm 2} , further preferably 100 to 800 mJ / cm ^2. The illuminance is preferably 20 to 1000 mW / cm ^2, more preferably 50 to 500 mW / cm ^2, further preferably 100 to 350 mW / cm ^2. Although there is no restriction | limiting in particular about the kind of liquid crystalline compound hardened | cured by polarized light irradiation, The liquid crystalline compound which has an ethylenically unsaturated group as a reactive group is preferable. The irradiation wavelength preferably has a peak at 300 to 450 nm, and more preferably has a peak at 350 to 400 nm.

[Post-curing by UV irradiation after polarized irradiation]
The optically anisotropic layer increases the reaction rate of the reactive group (post-curing) by further irradiating polarized or non-polarized ultraviolet rays after the first polarized irradiation (irradiation for photo-alignment), and improves the adhesion, etc. In addition to improvements, it will be possible to produce at a high transport speed. Post-curing may be polarized or non-polarized, but is preferably polarized. Moreover, it is preferable to carry out post-curing twice or more, and polarized light or non-polarized light may be combined with polarized light and non-polarized light. However, when combined, it is preferable to irradiate polarized light before non-polarized light. Irradiation with ultraviolet rays may or may not be replaced with an inert gas, but is preferably performed in an inert gas atmosphere having an oxygen concentration of 0.5% or less. The irradiation energy is preferably ^{20mJ / cm 2 ~10J / cm 2} , further preferably 100 to 800 mJ / cm ^2. The illuminance is preferably 20 to 1000 mW / cm ^2, more preferably 50 to 500 mW / cm ^2, further preferably 100 to 350 mW / cm ^2. In the case of polarized light irradiation, the irradiation wavelength preferably has a peak at 300 to 450 nm, and more preferably 350 to 400 nm. In the case of non-polarized light irradiation, it preferably has a peak at 200 to 450 nm, and more preferably has a peak at 250 to 400 nm.

[Horizontal alignment agent]
By including a horizontal alignment agent in the composition for forming an optical anisotropic layer such as a solution containing a liquid crystal compound, the molecules of the liquid crystal compound can be substantially horizontally aligned. In this specification, “horizontal alignment” means that in the case of a rod-like liquid crystal, the molecular long axis and the horizontal plane of the transparent support are parallel to each other. This means that the horizontal plane of the board surface and the transparent support is parallel, but it does not require that the plane is strictly parallel. And The inclination angle is preferably 0 to 5 degrees, more preferably 0 to 3 degrees, further preferably 0 to 2 degrees, and most preferably 0 to 1 degree.
Examples of the horizontal alignment agent include horizontal alignment agents described in paragraphs 0084 to 0093 of JP-A-2008-281989, and the contents thereof are incorporated in the present specification.
Specifically, for example, the following horizontal alignment agent can be used.

  The addition amount of the horizontal alignment agent is preferably 0.01 to 20% by mass, more preferably 0.01 to 10% by mass, and particularly preferably 0.02 to 1% by mass of the mass of the liquid crystal compound.

<< Optical characteristics of optically anisotropic layer >>
The retardation Re in the in-plane direction at a wavelength of 550 nm of the optically anisotropic layer is preferably 40 to 240 nm from the viewpoint that rainbow unevenness and blackout in a touch panel-mounted display can be further reduced. Here, the retardation Re is more preferably 40 to 140 nm from the viewpoint of thinning the optically anisotropic layer, and 40 to 140 nm from the viewpoint of reducing the color change when the viewing angle is changed while wearing polarized sunglasses. 90 nm is more preferable. Further, from the viewpoint of reducing the change in contrast when the viewing angle is changed while wearing polarized sunglasses, the retardation Re is more preferably 90 to 190 nm.
Here, the retardation Re in the in-plane direction at a wavelength of 550 nm can be obtained by an expression represented by Re = (nx−ny) × d. nx represents the refractive index in the in-plane slow axis direction of the optical anisotropic layer, ny represents the refractive index in the in-plane fast axis direction, nz represents the refractive index in the thickness direction, and d represents the film thickness.

<Other layers>
The optically anisotropic hard coat transfer film of the present invention may have other layers such as an alignment layer in addition to the temporary support, the hard coat layer, and the optically anisotropic layer.
In addition, the optically anisotropic hard coat transfer film of the present invention has an adhesive layer on the outermost surface opposite to the temporary support (this adhesive layer may be referred to as a first adhesive layer in the present specification). ).

<< Orientation layer >>
In the present invention, an alignment layer may be used to form the optically anisotropic layer. The alignment layer preferably has at least one layer between the temporary support and the optically anisotropic layer.
The alignment layer functions so as to define the alignment direction of the liquid crystal compound provided thereon. The orientation layer may be any layer as long as it can impart orientation to the optically anisotropic layer. Preferred examples of the alignment layer include a rubbing-treated layer of an organic compound (preferably a polymer), an oblique deposition layer of an inorganic compound, and a layer having a microgroove, ω-tricosanoic acid, dioctadecylmethylammonium chloride, and stearyl. Examples thereof include a cumulative film formed by Langmuir-Blodgett method (LB film) such as methyl acid, or a layer in which a dielectric is oriented by applying an electric field or a magnetic field.

  Examples of organic compounds for the alignment layer include polymethyl methacrylate, acrylic acid / methacrylic acid copolymer, styrene / maleimide copolymer, polyvinyl alcohol, poly (N-methylolacrylamide), styrene / vinyltoluene copolymer. Polymers such as chlorosulfonated polyethylene, nitrocellulose, polyvinyl chloride, chlorinated polyolefin, polyester, polyimide, vinyl acetate / vinyl chloride copolymer, ethylene / vinyl acetate copolymer, carboxymethyl cellulose, polyethylene, polypropylene and polycarbonate, and Examples of the compound include a silane coupling agent. Examples of preferable polymers include polyimide, polystyrene, polymers of styrene derivatives, gelatin, polyvinyl alcohol, and alkyl-modified polyvinyl alcohol having an alkyl group (preferably having 6 or more carbon atoms). As a commercial item, PVA205 (made by Kuraray) etc. are mentioned, for example.

For forming the alignment layer, it is preferable to use a polymer. The type of polymer that can be used can be determined according to the orientation (particularly the average tilt angle) of the liquid crystal compound. For example, in order to align the liquid crystalline compound horizontally, a polymer that does not decrease the surface energy of the alignment layer (ordinary alignment polymer) is used. Specific types of polymers are described in various documents about liquid crystal cells or optical compensation sheets. For example, polyvinyl alcohol or modified polyvinyl alcohol, a copolymer with polyacrylic acid or polyacrylic acid ester, polyvinyl pyrrolidone, cellulose or modified cellulose are preferably used. The alignment layer material may have a functional group capable of reacting with the reactive group of the liquid crystal compound. The reactive group can be introduced by introducing a repeating unit having a reactive group in the side chain or as a substituent of a cyclic group. It is more preferable to use an alignment layer that forms a chemical bond with the liquid crystal compound at the interface. Such an alignment layer is described in JP-A-9-152509, and acid chloride or Karenz MOI (manufactured by Showa Denko KK) The modified polyvinyl alcohol in which an acrylic group is introduced into the side chain by using The thickness of the alignment layer is preferably 0.01 to 5 μm, and more preferably 0.05 to 2 μm. The alignment layer may have a function as an oxygen blocking film. For example, Luvitec K30 (made by BASF) etc. are mentioned as the following polymers and a commercial item.

  Moreover, it is preferable to use a crosslinking agent for the formation of the alignment layer. Examples of the crosslinking agent include 50% by mass aqueous solution of glutaraldehyde (manufactured by Kanto Chemical Co., Inc.).

In order to align the liquid crystalline compound, rubbing treatment is preferably performed. At this time, a processing method widely adopted as a liquid crystal alignment processing step of the LCD (liquid crystal display device) can be used. That is, a method of obtaining the orientation by rubbing the surface of the orientation layer in a certain direction using paper, gauze, felt, rubber, nylon, polyester fiber or the like can be used. Generally, it is carried out by rubbing several times using a cloth or the like in which fibers having a uniform length and thickness are planted on average.
Further, it is preferable that the rubbing treatment direction is inclined by 45 degrees with respect to the coating direction. As a result, the slow axis of the optically anisotropic layer can be set to 45 degrees with respect to the coating direction, and the optically anisotropic layer can be effectively bonded in the direction of 45 degrees with respect to the transmission axis of the upper polarizing plate of the LCD. Can do.

Moreover, as a vapor deposition material for the inorganic oblique vapor deposition film, SiO ₂ is representative, and metal oxides such as TiO ₂ and ZnO ₂ , fluorides such as MgF ₂ , metals such as Au and Al, and the like can be cited. . The metal oxide can be used as an oblique deposition material as long as it has a high dielectric constant, and is not limited to the above. The inorganic oblique deposition film can be formed using a deposition apparatus. An inorganic oblique vapor deposition film can be formed by fixing the film (support) and performing vapor deposition, or moving the long film and performing continuous vapor deposition.

  As thickness of an orientation layer, 0.1-1 micrometer is preferable, 0.2-0.8 micrometer is more preferable, 0.3-0.7 micrometer is further more preferable.

<< Adhesive layer >>
In this invention, a 1st adhesion layer can be provided as a layer for ensuring the close_contact | adherence of the laminated body formed using the optically anisotropic hard coat transfer film of this invention, and a touch sensor.

  As a material constituting the first adhesive layer, a known adhesive insulating material is preferably used. For example, rubber-based, acrylic-based, natural rubber-based, synthetic rubber-based, silicone-based, polyester-based, polyamide-based, Examples include polyurethane, (modified) polyolefin, polyvinyl alcohol, polyvinyl ether, vinyl acetate / vinyl chloride copolymer, epoxy, and fluorine. Among these, acrylics having repeating units derived from alkyl (meth) acrylates are excellent in transparency, exhibiting adhesive properties such as moderate wettability, cohesiveness and adhesiveness, and excellent in weather resistance and heat resistance. Acrylics having a main component of a polymer are preferred. As a commercial item, highly transparent adhesive transfer tape 8146-1 (made by 3M company) etc. are mentioned, for example.

  Among the acrylic adhesive insulating materials, an acrylic polymer having a repeating unit derived from an alkyl (meth) acrylate having an alkyl group with about 1 to 12 carbon atoms is preferable because the adhesiveness is more excellent. In the repeating unit in the acrylic polymer, a repeating unit derived from (meth) acrylic acid may be contained.

  Although the thickness in particular of a 1st adhesion layer is not restrict | limited, It is preferable that it is 5-350 micrometers, and it is more preferable that it is 20-150 micrometers. Further, from the viewpoint of thinning the touch panel, 50 μm or less is more preferable.

  Within the above range, desired visible light transmittance can be obtained, and handling is easy. The total light transmittance is preferably 85 to 100%, and preferably exhibits optical isotropy.

<Layer structure of optically anisotropic hard coat transfer film>
If the optically anisotropic hard coat transfer film of the present invention has a hard coat layer and an optical anisotropic layer on a temporary support, the order of lamination and the number of hard coat layers and optical anisotropic layers are as follows. Although not particularly limited, it is preferable that the temporary support, the hard coat layer, and the optically anisotropic layer are laminated in this order. The temporary support and the hard coat layer are preferably laminated adjacent to each other. Furthermore, it is preferable that at least one alignment layer is provided between the temporary support and the optical anisotropic layer, and the alignment layer and the optical anisotropic layer are laminated adjacent to each other. In a particularly preferred embodiment, the temporary support, the hard coat layer, the alignment layer, and the optically anisotropic layer are laminated adjacent to each other in this order.
In this specification, the term “stacked adjacent to each other” refers to a state in which the layers are not stacked via another layer, but the surfaces are directly in contact with each other and stacked.

Hereinafter, a specific layer configuration of the optically anisotropic hard coat transfer film of the present invention will be described. Note that the drawings in this specification are schematic diagrams, and the thickness relationship and positional relationship of each layer do not necessarily match the actual ones.
FIG. 1 is a cross-sectional view showing an example of the optically anisotropic hard coat transfer film of the present invention. The optically anisotropic hard coat transfer film 200 has a hard coat layer 101 and an optically anisotropic layer 102 on one surface of the temporary support 100. Other layers may be provided between the temporary support 100, the hard coat layer 101, and the optical anisotropic layer 102, or on the outermost surface of the optically anisotropic hard coat transfer film 200. Examples of other layers include an alignment layer, an adhesive thin layer, and the first adhesive layer.

  The order of lamination of the hard coat layer 101 and the optically anisotropic layer 102 and the number of lamination of each layer are not particularly limited. However, as shown in FIG. 1, the temporary support is used so that the hard coat layer becomes the outermost surface after touch sensor transfer. 100 and the hard coat layer are preferably laminated adjacent to each other. Thereby, the scratch resistance of the touch panel can be improved.

In addition, as shown in FIG. 2, at least one alignment layer 103 is provided between the temporary support 100 and the optical anisotropic layer 102, and the alignment layer 103 and the optical anisotropic layer 102 are adjacent to each other. It is preferable to laminate. Thereby, the nonuniformity of the optical anisotropic layer 102 can be suppressed and the image nonuniformity can be reduced.
Furthermore, as shown in FIG. 2, it is preferable that no adhesive layer exists between the hard coat layer 101 and the optically anisotropic layer 102. As a result, the optical anisotropic layer 102 can be made harder to crack than the case where the hard coat layer 101 and the optical anisotropic layer 102 are laminated via the adhesive layer, and the adhesive layer is not present. The thickness of the touch panel produced using the optically anisotropic hard coat transfer film can be reduced.

  Combining the above three viewpoints, as shown in FIG. 2, it is most preferable that the temporary support 100, the hard coat layer 101, the alignment layer 103, and the optically anisotropic layer 102 are laminated adjacent to each other in this order.

  Further, as shown in FIG. 3 and FIG. 4 as an example, the first adhesive layer 104 may be provided on the outermost surface opposite to the temporary support 100. Thereby, the effort which prepares an adhesion layer at the time of preparation of a touch panel can be saved.

(Method for producing optically anisotropic hard coat transfer film)
In the method for producing an optically anisotropic hardcoat transfer film of the present invention, the hardcoat layer and the optically anisotropic layer are preferably formed by coating, whereby the hardcoat layer and the optically anisotropic layer can be adhered to each other. it can.
A step of applying a hard coat layer coating solution (coating solution) and an optically anisotropic layer coating solution onto the temporary support. Moreover, what is necessary is just to apply | coat the coating liquid for alignment layers, when forming an alignment layer.
The order of applying the coating liquid for hard coat layer, the coating liquid for alignment layer, and the coating liquid for optically anisotropic layer is not particularly limited, and each layer is applied by applying each coating liquid in the desired layer configuration order. What is necessary is just to form.

As a coating method, for example, a known coating method such as a gravure coater or a bar coater can be used.
The coating liquid may be an aqueous system using water as a coating solvent, or a solvent system using an organic solvent such as 2-butanone or cyclohexanone. A coating solvent may be used individually by 1 type, and may mix and use 2 or more types.

Moreover, you may make the coating liquid contain the said surfactant as needed.
After applying each coating liquid, it may be dried, and if necessary, light irradiation with ultraviolet rays or the like may be performed as described below.

(Touch panel)
The touch panel of the present invention has at least one hard coat layer, at least one optical anisotropic layer, one adhesive layer, and a touch sensor. 0 to 1000 nm. The touch panel of the present invention may be produced using the above-described optically anisotropic hard coat transfer film of the present invention, but may be produced using other materials and methods. In the touch panel of the present invention, rainbow unevenness and blackout are reduced.

FIG. 5 is a cross-sectional view showing an example of the touch panel of the present invention. As shown in FIG. 5, the touch panel 1 includes a touch sensor 3, and an optical anisotropic layer 102, an alignment layer 103, a hard coat layer 101, and the like are provided on one surface of the touch sensor 3 via a first adhesive layer 104. A laminate 210 formed by using the optically anisotropic hard coat transfer film of the present invention is bonded. A protective substrate 50 is bonded to the other surface of the touch sensor 3 via the second adhesive layer 42.
The preferred mode of the second adhesive layer 42 is the same as the preferred mode of the first adhesive layer 104.

FIG. 6 is a cross-sectional view showing an example of an image display device equipped with the touch panel of the present invention. The touch panel of the present invention has at least a touch sensor 3 and an image display panel 2, and the image display panel 2 emits linearly polarized light to the viewing side. In addition, in FIG. 6, it visually recognizes from the direction of the arrow. The image display panel 2 includes at least an image display cell 4 and a polarizing plate 5 on the viewing side.
Note that a hard coat layer may be provided on the viewing side on the protective substrate 50, or an adhesive layer may be disposed between the image display panel 2 and the touch sensor 3 and bonded.

  When the touch panel 1 is a capacitive touch panel, the capacitance between the finger and the detection electrode in the touch sensor 3 changes when a finger approaches or contacts the protective substrate 50 on the touch sensor 3. To do. Here, a position detection driver (not shown) always detects a change in capacitance between the finger and the detection electrode. When the position detection driver detects a change in capacitance that is equal to or greater than a predetermined value, the position detection driver detects a position where the change in capacitance is detected as an input position. In this way, the touch panel 1 can detect the input position.

(Touch panel manufacturing method)
The method for producing a touch panel of the present invention includes a step of forming a first adhesive layer on the outermost surface opposite to the temporary support side of the optically anisotropic hard coat transfer film, and the above-mentioned via the first adhesive layer. It includes a step of transferring the hard coat transfer film to the touch sensor and a step of peeling the temporary support. When the optically anisotropic hard coat transfer film has the first adhesive layer on the outermost surface opposite to the temporary support side, a step of transferring the optically anisotropic hard coat transfer film to the touch sensor, And a step of peeling the support.

  The method for transferring the optically anisotropic hard coat transfer film onto the touch sensor is not particularly limited, and the method is not particularly limited as long as the optical anisotropic layer and the hard coat layer can be transferred onto the touch sensor. For example, the optically anisotropic hard coat transfer film of the present invention is attached by pressing or thermocompression bonding with a roller or flat plate heated and / or pressurized using a laminator with the transfer adhesive layer side facing the touch sensor surface. be able to. Specific examples include laminators and laminating methods described in JP-A-7-110575, JP-A-11-77942, JP-A-2000-334836, and JP-A-2002-148794. From the viewpoint of foreign matter, it is preferable to use the method described in JP-A-7-110575. Thereafter, the temporary support may be peeled off, and another layer such as an electrode layer may be formed on the surface of the optically anisotropic layer or hard coat layer exposed by peeling.

  Hereinafter, each member of the touch panel 1 will be described in detail. First, the image display panel 2 will be described. The first adhesive layer, optically anisotropic layer, and hard coat layer are as described above in the present specification.

<Protection board>
The protective substrate 50 constituting the touch surface is preferably an insulating transparent substrate. The protective substrate 50 is preferably optically isotropic, has high mechanical strength and heat resistance, and preferably has good dimensional stability, and a glass plate is preferably used. Further, since the glass plate is heavy, a plastic film and a plastic plate may be used.

  When a glass plate is used as the protective substrate 50, tempered glass that is more difficult to break is preferable, and chemically tempered glass that is more difficult to break is more preferable. Examples of commercially available products include gorilla glass (manufactured by Corning), dragon trail (manufactured by Asahi Glass), and the like.

When a plastic film and a plastic plate are used as the protective substrate 50, examples of raw materials include polyester resins (polyethylene terephthalate: PET, polyethylene naphthalate: PEN, etc.), polyolefin resins (polyethylene: PE, polypropylene: PP, etc.). ), Vinyl resin (polystyrene: PS, ethylene-vinyl acetate copolymer: EVA, polyvinyl chloride: PVC, etc.), cyclic olefin resin (cyclic olefin polymer: COP, cyclic olefin copolymer: COC), cellulose resin (triacetyl) Cellulose: TAC, etc.), polycarbonate resin: PC, polyamide resin, polyimide resin, acrylic resin, polyurethane resin, and the like can be used.
From the viewpoint of mechanical strength, dimensional stability, and heat resistance, a polyester film mainly composed of a polyester resin such as PET or PEN is preferably used. However, rainbow unevenness occurs due to optical anisotropy caused by stretched film formation. Since it is easy, the cyclic olefin film which has cyclic olefin resin, such as COP and COC, as a main component is preferable. Further, it is preferable that the protective substrate 50 is arranged so that an angle formed by the in-plane slow axis of the protective substrate 50 and the vibration direction of the linearly polarized light emitted from the image display panel 2 is perpendicular or parallel. Thereby, rainbow nonuniformity can be suppressed.

The protective substrate 50 may be a single layer or a multilayer of two or more layers. The thickness of the protective substrate 50 (when the protective substrate 50 is a multilayer of two or more layers, the total thickness thereof) is not particularly limited, but is preferably 5 to 350 μm, and more preferably 20 to 150 μm. Within the above range, desired visible light transmittance can be obtained, and handling is easy. The total light transmittance is preferably 85 to 100%.
Moreover, the planar view shape of the protective substrate 50 is not specifically limited, For example, rectangular shape, circular shape, polygonal shape etc. are mentioned.

<Image display panel>
The image display panel 2 includes an image display cell 4 and a polarizing plate 5 (viewing-side polarizing plate) on the viewing side.
As the image display cell 4, a liquid crystal cell, an organic EL cell, or the like is used.
Liquid crystal cells include reflective liquid crystal cells that use external light, transmissive liquid crystal cells that use light from a light source such as a backlight, and semi-transmissive and semi-reflective types that use both external light and light from the light source. Any liquid crystal cell may be used. In addition, as a driving method of the liquid crystal cell, for example, any type such as a VA mode, an IPS mode, a TN mode, an STN mode, or a bend alignment (π type) can be used. When a transmissive liquid crystal cell or a transflective liquid crystal cell is adopted as the liquid crystal cell, the image display panel includes a light source side polarizing plate on the side opposite to the viewing side of the liquid crystal cell, and further includes a light source. It may be. In this case, the light emitted from the light source is converted in its polarization state while propagating through the liquid crystal cell, and the amount of transmitted light is absorbed by the polarizing plate arranged on the viewing side of the liquid crystal cell, so that the amount of light corresponding to the polarization state is absorbed. Has been adjusted to enable image display. Therefore, the light emitted from the image display panel to the viewing side is linearly polarized light having a vibration surface in the transmission axis direction of the polarizing plate 5.

As the organic EL cell, for example, a light emitting body (organic electroluminescent light emitting body) in which a transparent electrode, an organic light emitting layer, and a metal electrode are sequentially laminated on a transparent substrate is used. The organic light emitting layer is a laminate of various organic thin films, for example, a laminate of a hole injection layer made of a triphenylamine derivative or the like and a light emitting layer made of a fluorescent organic solid such as anthracene, or the like Structures having various combinations such as a laminate of an electron injection layer made of a light emitting layer and a perylene derivative, or a laminate of these hole injection layer, light emitting layer, and electron injection layer are known. Since the organic EL panel enables image display by adjusting the light emission amount of the organic EL cell itself, a polarizing plate is not essential for image display. However, since the thickness of the organic light emitting layer is very thin, external light is reflected by the metal electrode and emitted again to the viewing side, and when viewed from the outside, the display surface of the organic EL display device may appear as a mirror surface. is there. In order to shield such specular reflection of external light, a circularly polarizing plate 8 in which a polarizing plate 5 and a quarter-wave plate 7 are laminated is arranged on the viewing side of the organic EL cell 6 as shown in FIG. The method is adopted. Therefore, the light emitted from the organic EL panel 9 including the circularly polarizing plate 8 on the viewing side to the viewing side is linearly polarized light having a vibration surface in the transmission axis direction of the polarizing plate 5 constituting the circularly polarizing plate 8.
As described above, the light emitted from the image display cell is absorbed by the polarizing plate 5 in the absorption axis direction of the polarizing plate 5 and only the light in the transmission axis direction orthogonal to the absorption axis direction is emitted to the touch sensor 3 side. Is done.

  As the polarizing plate 5, a polarizing plate having an appropriate absorption linear polarizer is used. As such a polarizing plate, for example, a polarizing plate made of a polyvinyl alcohol-based stretched film containing iodine is suitably used.

<Touch sensor>
The touch sensor 3 is arranged on the image display panel 2 (operator side), and uses, for example, a change in capacitance that occurs when an external conductor such as a human finger contacts (approaches) to It is a sensor that detects the position of an external conductor such as a finger.
The touch sensor 3 is a projection type that identifies the coordinates of a finger by detecting a change in electrostatic capacitance of a detection electrode (in particular, a detection electrode extending in the X direction and a detection electrode extending in the Y direction) that is in contact with or close to the finger. A capacitive touch sensor is preferably used. For example, a resistive film type touch sensor may be used as the touch sensor 3.

  The configuration of the touch sensor 3 preferably includes at least a conductive film having a substrate and a detection electrode disposed on at least one surface of the substrate. The detection electrode constitutes a conductive part in the conductive film.

8 and 9 are diagrams showing examples of a capacitive touch sensor using a single conductive film. FIG. 8 shows a plan view of the capacitive touch sensor 300. FIG. 9 is a cross-sectional view taken along the cutting line AA in FIG.
8 and 9 are schematically shown to facilitate understanding of the layer configuration of the touch sensor, and are not drawings that accurately represent the arrangement of each layer.

The capacitive touch sensor 300 includes a support 12, a first detection electrode 14 disposed on one main surface (on the surface) of the support 12, a first lead-out wiring 16, and the other main surface. A second detection electrode 18 and a second lead-out wiring 20 are provided (on the back surface). The region where the first detection electrode 14 and the second detection electrode 18 are provided constitutes an input region E _I that can be input by the user, and the outer region EO located outside the input region E _I includes the first region E _I. The lead wiring 16, the second lead wiring 20, and a flexible printed wiring board (not shown) are disposed.
In the above description, the aspect in which the first detection electrode 14 and the second detection electrode 18 are arranged on the front surface and the back surface of the support 12 has been described in detail. However, the touch sensor is not limited to this aspect, and the order of each layer Even if they are different, other layers are added, or two or more conductive films are bonded via an adhesive layer.

<< Support >>
The support 12 plays a role of supporting a first detection electrode 14 and a second detection electrode 18 described later in the input area E _I and supports a first extraction wiring 16 and a second extraction wiring 20 described later in the outer area EO. It is a member that plays the role of

  The retardation Re40 in the direction of 40 degrees at a wavelength of 550 nm of the support 12 is from 0 to 1000 nm, more preferably from 0 to 500 nm, and further preferably from 0 to 40 nm in that the generation of rainbow unevenness is further suppressed.

The angle formed by the in-plane slow axis of the support 12 and the vibration direction of the linearly polarized light emitted from the image display panel 2 described above is preferably perpendicular or parallel, and the occurrence of rainbow unevenness is further suppressed. More preferably, the point is a right angle. The definitions of right angle and parallel are as described above.
In addition, the said aspect is synonymous with the angle which the in-plane slow axis of the support body 12 and the transmission axis | shaft of the polarizing plate 5 (viewing side polarizing plate) in the image display panel 2 make at right angle or parallel. .

  As with the protective substrate 50, the support 12 is preferably an insulating transparent substrate. For example, a plastic film, a plastic plate, a glass plate, etc. are mentioned. Among these, a plastic film is preferable because of its excellent toughness.

When a plastic film and a plastic plate are used as the support 12, the raw material is the same as that of the protective substrate 50. Specifically, polyester resins (polyethylene terephthalate: PET, polyethylene naphthalate: PEN, etc.), polyolefin resins (polyethylene: PE, polypropylene: PP, etc.), vinyl resins (polystyrene: PS, ethylene-vinyl acetate copolymer: EVA, polyvinyl chloride: PVC, etc., cyclic olefin resin (cyclic olefin polymer: COP, cyclic olefin copolymer: COC), cellulose resin (triacetyl cellulose: TAC, etc.), polycarbonate resin: PC, polyamide resin, polyimide Resin, acrylic resin, polyurethane resin, etc. can be used.
From the viewpoint of mechanical strength, dimensional stability, and heat resistance, a film mainly composed of a polyester-based resin such as PET or PEN is preferably used, but rainbow unevenness is likely to occur due to optical anisotropy due to stretched film formation. . For this reason, the film which has cyclic olefin resin, such as optically isotropic COP and COC, as a main component is preferable.

The support 12 may be a single layer or a multilayer of two or more layers. The thickness of the support 12 (when the support 12 is a multilayer of two or more layers, the total thickness thereof) is not particularly limited, but is preferably 5 to 350 μm, and more preferably 20 to 150 μm. Within the above range, desired visible light transmittance can be obtained, and handling is easy.
The total light transmittance is preferably 85 to 100%.
Moreover, the planar view shape of the support body 12 is not specifically limited, For example, rectangular shape, circular shape, polygonal shape etc. are mentioned.

<<< Film mainly composed of cyclic olefin resin >>>
As the norbornene resin (norbornene unit) to be a raw material for a film containing cyclic olefin resin as a main component (hereinafter also referred to as cyclic olefin film), saturated norbornene resin-A and saturated norbornene resin-B described below are preferable. As an example. Any of these saturated norbornene resins can be formed by the solution film forming method and the melt film forming method described later, but the saturated norbornene resin-A is more preferably formed by the melt film forming method. The resin-B is more preferably formed by melting and solution casting.

(Saturated norbornene resin-A)
As the saturated norbornene resin-A, (1) a ring-opening (co) polymer of a norbornene-based monomer is subjected to polymer modification such as maleic acid addition or cyclopentadiene addition as necessary, and then further hydrogenated. Obtained resin, (2) Resin obtained by addition polymerization of norbornene monomer, (3) Obtained by addition copolymerization of norbornene monomer and olefin monomer such as ethylene and α-olefin Examples thereof include resins. The polymerization method and the hydrogenation method can be performed by conventional methods.

  Examples of the norbornene-based monomer include norbornene and alkyl and / or alkylidene substituted products thereof (for example, 5-methyl-2-norbornene, 5-dimethyl-2-norbornene, 5-ethyl-2-norbornene, 5-butyl- 2-norbornene, 5-ethylidene-2-norbornene, etc.), polar group substituents such as halogens thereof; dicyclopentadiene, 2,3-dihydrodicyclopentadiene, etc .; dimethanooctahydronaphthalene, alkyl and / or alkylidene thereof Substituents and polar group substituents such as halogen (for example, 6-methyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6- Ethyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octa Dronaphthalene, 6-ethylidene-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-chloro-1,4: 5,8-dimethano -1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-cyano-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a -Octahydronaphthalene, 6-pyridyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-methoxycarbonyl-1,4: 5 8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, etc.); adducts of cyclopentadiene and tetrahydroindene, etc .; 3-pentamers of cyclopentadiene (for example, 4, 9: 5,8-dimethano-3a, 4,4a, , 8,8a, 9,9a-octahydro-1H-benzoindene, 4,11: 5,10: 6,9-trimethano-3a, 4,4a, 5,5a, 6,9,9a, 10,10a, 11, 11a-dodecahydro-1H-cyclopentanthracene) and the like. These norbornene monomers may be used alone or in combination of two or more.

(Saturated norbornene resin-B)
Examples of the saturated norbornene resin-B include those represented by the following general formulas (1) to (4). Among these, those represented by the following general formula (1) are particularly preferable.

In general formulas (1) to (4), R ^{1 to} R ¹² each independently represent a hydrogen atom or a monovalent substituent (preferably an organic group), and at least one of them is a polar group. Is preferred. The mass average molecular weight of these saturated norbornene resins is usually preferably 5,000 to 1,000,000, more preferably 8,000 to 200,000.

  Examples of the substituent include those described in paragraph [0036] of Japanese Patent No. 5009512. Moreover, as said polar group, what was described in the paragraph [0037] of patent 5009512 can be illustrated.

Examples of saturated norbornene resins that can be used in the present invention include, for example, JP-A-60-168708, JP-A-62-252406, JP-A-62-2252407, JP-A-2-133413, Examples thereof include resins described in JP-A-63-145324, JP-A-63-264626, JP-A-1-240517, JP-B-57-8815, and the like.
Among these resins, a hydrogenated polymer obtained by hydrogenating a ring-opening polymer of a norbornene monomer is particularly preferable.

  In the present invention, as the saturated norbornene resin, at least one tetracyclododecene derivative represented by the following general formula (5) alone or an unsaturated cyclic copolymerizable with the tetracyclododecene derivative. A hydrogenated polymer obtained by hydrogenating a polymer obtained by metathesis polymerization with a compound can also be used.

In General Formula (5), R ^{13 to} R ¹⁶ each independently represent a hydrogen atom or a monovalent substituent (preferably an organic group), and at least one of these is preferably a polar group. Specific examples and preferred ranges of the substituents and polar groups herein are the same as those described for the general formulas (1) to (4).
In the tetracyclododecene derivative represented by the above general formula (5), when at least one of R ^{13 to} R ¹⁶ is a polar group, a film having excellent adhesion to other materials, heat resistance, and the like is obtained. be able to. Further, the polar group is a group represented by — (CH ₂ ) _n COOR (where R is a hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 0 to 10). The resulting hydrogenated polymer (polarizing film substrate) is preferred because it has a high glass transition temperature. In particular, the polar substituent represented by — (CH ₂ ) _n COOR is preferably contained in one molecule of the tetracyclododecene derivative of the general formula (5) from the viewpoint of reducing the water absorption rate. In the above polar substituent, it is preferable in that the hygroscopicity of the obtained hydrogenated polymer is reduced as the number of carbon atoms of the hydrocarbon group represented by R is increased. From this point, the hydrocarbon group is preferably a chain alkyl group having 1 to 4 carbon atoms or a (poly) cyclic alkyl group having 5 or more carbon atoms, and particularly preferably a methyl group, an ethyl group, or a cyclohexyl group. preferable.

Furthermore, the tetracyclododecene derivative of the general formula (5) in which a hydrocarbon group having 1 to 10 carbon atoms is bonded as a substituent to a carbon atom to which a group represented by — (CH ₂ ) _n COOR is bonded, This is preferable because the resulting hydrogenated polymer has low hygroscopicity. In particular, the tetracyclododecene derivative of the general formula (5) in which the substituent is a methyl group or an ethyl group is preferable in terms of easy synthesis. Specifically, 8-methyl-8-methoxycarbonyltetracyclo [4,4,0,1 ^2.5, 1 ^7.10] dodeca-3-ene are preferred. These tetracyclododecene derivatives and mixtures of unsaturated cyclic compounds copolymerizable therewith are described, for example, in JP-A-4-77520, page 4, upper right column, line 12 to page 6, lower right column, line 6. Metathesis polymerization and hydrogenation can be carried out by the prepared method.
These norbornene resins preferably have an intrinsic viscosity (η _inh ) measured at 30 ° C. in chloroform of 0.1 to 1.5 dl / g, more preferably 0.4 to 1.2 dl / g. g. The hydrogenation rate of the hydrogenated polymer is preferably 50% or more, more preferably 90% or more, and still more preferably 98% or more, as measured by 60 MHz and ¹ H-NMR. The higher the hydrogenation rate, the more the saturated norbornene film obtained has better stability to heat and light. The gel content contained in the hydrogenated polymer is preferably 5% by mass or less, and more preferably 1% by mass or less.

(Other ring-opening polymerizable cycloolefins)
In the present invention, other cycloolefins capable of ring-opening polymerization can be used in combination. Specific examples of such cycloolefins include compounds having one reactive double bond such as cyclopentene, cyclooctene, and 5,6-dihydrodicyclopentadiene. The content of these ring-opening polymerizable cycloolefins is preferably 0 mol% to 50 mol%, more preferably 0.1 mol% to 30 mol%, relative to the norbornene-based monomer. , 0.3 mol% to 10 mol% is particularly preferable.

The cyclic olefin resin may be a cyclic olefin resin copolymer containing an ethylene unit and a norbornene unit. An ethylene unit is a repeating unit represented by —CH ₂ CH ₂ —. A cyclic olefin resin copolymer is obtained by vinyl polymerization of the ethylene unit with the norbornene unit described above. The copolymer molar ratio of norbornene units and ethylene units is preferably 80:20 to 20:80, more preferably 80:20 to 50:50, and more preferably 80:20 to 60:40. preferable.

  The cyclic olefin-based resin copolymer may contain a small amount of repeating units composed of other copolymerizable vinyl monomers in addition to the ethylene unit and the norbornene unit. Specific examples of the other vinyl monomers include propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1 -C3-C18 alpha olefins such as octadecene, cycloolefins such as cyclobutene, cyclopentene, cyclohexene, 3-methylcyclohexene and cyclooctene. Such vinyl monomers may be used alone or in combination of two or more, and the repeating unit is preferably 10 mol% or less, more preferably 5 mol% or less.

(Other additives)
Other additives can be added to the cyclic olefin resin as long as the object of the present invention is not impaired. Examples of the additive include an antioxidant, an ultraviolet absorber, a lubricant, and an antistatic agent. In particular, when the cyclic olefin-based resin is installed on the surface of various devices, it is preferable to include an ultraviolet absorber. As the ultraviolet absorber, a benzophenone-based ultraviolet absorber, a benzotriazole-based ultraviolet absorber, an acrylonitrile-based ultraviolet absorber, or the like can be used.

  The cyclic olefin-based resin includes an addition polymerization type and a ring-opening polymerization type, and any of them may be used. Examples of the ring-opening polymerization type cyclic olefin resin include, for example, WO2009 / 041377, WO2008 / 108199, WO2007 / 001020, WO2006 / 112304, JP2008-037932, WO2007 / 043573, WO2007 / 010830, Japanese Patent Application No. 2007-525979 (Patent No. 5233280), WO 2007/001020, Japanese Patent Application Laid-Open No. 2007-063356, Japanese Patent Application Laid-Open No. 2009-210756, Japanese Patent Application Laid-Open No. 2008-158088, Japanese Patent Application Laid-Open No. 2001-356213, Japanese Unexamined Patent Publication No. 2004-212848, Japanese Unexamined Patent Application Publication No. 2003-014901, Japanese Unexamined Patent Application Publication No. 2000-219752, Japanese Unexamined Patent Application Publication No. 2005-008698, Japanese Unexamined Patent Application Publication No. 2007-013587, Japanese Unexamined Patent Application Publication No. 2012-0563. No. 2, No. 7-197623, No. 2006-215333, No. 2006-235085, No. 2005-173072, Japanese Patent Application No. 2003-578978 (Japanese Patent No. 4292993), JP 2004-258188 A, JP 2003-136635 A, JP 2003-236915 A, JP 10-130402 A, JP 9-263627 A, JP 4-361230 A, and JP 4-4-1. Examples thereof include ring-opening polymerization type cyclic olefin resins described in JP-A No. 363312, JP-A-4-170425, JP-A-3-223328 and the like.

  Examples of the addition polymerization type cyclic olefin-based resin include, for example, WO2009 / 139293, WO2006 / 030797, Japanese Patent Application No. 2006-535159 (Patent No. 4493660), JP2007-232874A, and JP2007-009010A. No. WO2013 / 1797871, WO2012 / 114608, WO2008 / 078812, JP-A-11-142645, JP-A-10-287713, Japanese Patent Application No. 2008-548162 (Japanese Patent No. 5220616), JP-A-11- No. 142645, JP-A-10-258025, JP-A-2001-026682, JP-A-5-025337, JP-A-3-273043 and the like, and the like. It is done.

A commercial item can be used as a cyclic olefin system film. Examples of commercially available products include Arton (manufactured by JSR Corporation), Zeonoa (manufactured by Nippon Zeon Corporation), F film (manufactured by Gunze Corporation), Panapeel NP-75-A (manufactured by Panac Corporation), and the like. It is done.
The glass transition temperature Tg of the resin is preferably 150 ° C. or more from the viewpoint of heat resistance.
Commercial products other than the above-mentioned cyclic olefin film can also be used, and examples of the commercial products include TD40UL (manufactured by Fujifilm), Lumirror for magnetic materials (manufactured by Toray Industries, Inc.), and the like.

<Conductive layer>
The first detection electrode 14 and the second detection electrode 18 are sensing electrodes that sense a change in capacitance, and constitute a sensing unit (sensor unit). That is, when the fingertip is brought into contact with the touch panel, the mutual capacitance between the first detection electrode 14 and the second detection electrode 18 changes, and the position of the fingertip is calculated by the IC circuit based on the change amount.
First detection electrode 14, which has a role to detect the input position in the X direction of the finger of the user in proximity to the input region E _I, has the function of generating an electrostatic capacitance between the finger ing. The first detection electrodes 14 are electrodes that extend in a first direction (X direction) and are arranged at a predetermined interval in a second direction (Y direction) orthogonal to the first direction. Includes patterns.
Second detection electrode 18, which has a role to detect the input position in the Y direction of the finger of the user in proximity to the input region E _I, has the function of generating an electrostatic capacitance between the finger ing. The second detection electrodes 18 are electrodes that extend in the second direction (Y direction) and are arranged at a predetermined interval in the first direction (X direction), and include a predetermined pattern as will be described later. In FIG. 3, five first detection electrodes 14 and five second detection electrodes 18 are provided, but the number is not particularly limited and may be plural.

  In FIG. 8, the 1st detection electrode 14 and the 2nd detection electrode 18 can be comprised by a conductive fine wire, for example. FIG. 10 shows an enlarged plan view of a part of the first detection electrode 14. As shown in FIG. 10, the first detection electrode 14 is composed of conductive thin wires 30, and includes a plurality of lattices 32 formed of intersecting conductive thin wires 30. In other words, the first detection electrode 14 has a mesh pattern composed of a plurality of conductive thin wires that intersect. Note that, similarly to the first detection electrode 14, the second detection electrode 18 also includes a plurality of lattices 32 formed by intersecting conductive thin wires 30.

  Examples of the material of the conductive thin wire 30 include metals and alloys such as gold (Au), silver (Ag), copper (Cu), and aluminum (Al), ITO, tin oxide, zinc oxide, cadmium oxide, gallium oxide, Examples thereof include metal oxides such as titanium oxide. Especially, it is preferable that it is silver from the reason for which the electroconductivity of the electroconductive fine wire 30 is excellent.

It is preferable that a binder is contained in the conductive thin wire 30 from the viewpoint of adhesion between the conductive thin wire 30 and the support 12.
The binder is preferably a water-soluble polymer because the adhesion between the conductive fine wire 30 and the support 12 is more excellent. Examples of the binder include gelatin, carrageenan, polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), polysaccharides such as starch, cellulose and derivatives thereof, polyethylene oxide, polysaccharides, polyvinylamine, chitosan, polylysine, polyacryl. Examples include acid, polyalginic acid, polyhyaluronic acid, carboxycellulose, gum arabic, and sodium alginate. Among these, gelatin is preferable because the adhesion between the conductive fine wire 30 and the support 12 is more excellent.
In addition to lime-processed gelatin, acid-processed gelatin may be used as gelatin, and gelatin hydrolyzate, gelatin enzyme decomposition product, and other gelatins modified with amino groups and carboxyl groups (phthalated gelatin, acetylated gelatin) Can be used.

The volume ratio of metal to binder (metal volume / binder volume) in the conductive thin wire 30 is preferably 1.0 or more, and more preferably 1.5 or more. By setting the volume ratio of the metal and the binder to 1.0 or more, the conductivity of the conductive thin wire 30 can be further increased. The upper limit is not particularly limited, but is preferably 4.0 or less and more preferably 2.5 or less from the viewpoint of productivity.
The volume ratio of the metal and the binder can be calculated from the density of the metal and the binder contained in the conductive thin wire 30. For example, when the metal is silver, the density of silver is 10.5 g / cm ³ , and when the binder is gelatin, the density of gelatin is 1.34 g / cm ³ .

The line width of the conductive thin wire 30 is not particularly limited, but is preferably 30 μm or less, more preferably 15 μm, further preferably 10 μm, particularly preferably 9 μm or less, and particularly preferably 7 μm or less, from the viewpoint that a low-resistance electrode can be formed relatively easily. Is most preferable, 0.5 μm or more is preferable, and 1.0 μm or more is more preferable.
The thickness of the conductive thin wire 30 is not particularly limited, but can be selected from 0.00001 to 0.2 mm from the viewpoint of conductivity and visibility, but is preferably 30 μm or less, more preferably 20 μm or less, 0.01 ˜9 μm is more preferable, and 0.05 to 5 μm is most preferable.

The lattice 32 includes an opening region surrounded by the conductive wiring 30. The length W of one side of the grating 32 is preferably 800 μm or less, more preferably 600 μm or less, and preferably 400 μm or more.
In the first detection electrode 14 and the second detection electrode 18, the aperture ratio is preferably 85% or more, more preferably 90% or more, and most preferably 95% or more from the viewpoint of visible light transmittance. preferable. The aperture ratio corresponds to the ratio of the transmissive portion excluding the conductive thin wire 30 in the first detection electrode 14 or the second detection electrode 18 in the predetermined region.

The lattice 32 has a substantially rhombus shape. However, other polygonal shapes (for example, a triangle, a quadrangle, and a hexagon) may be used. Further, the shape of one side may be a curved shape or a circular arc shape in addition to a linear shape. In the case of the arc shape, for example, the two opposing sides may have an outwardly convex arc shape, and the other two opposing sides may have an inwardly convex arc shape. The shape of each side may be a wavy shape in which an outwardly convex arc and an inwardly convex arc are continuous. Of course, the shape of each side may be a sine curve.
In FIG. 10, the conductive thin wire 30 is formed as a mesh pattern, but is not limited to this mode, and may be a stripe pattern.

In FIG. 8, the first detection electrode 14 and the second detection electrode 18 have a mesh structure of conductive thin wires, but are not limited to this mode. For example, ITO, tin oxide, zinc oxide, It may be a transparent metal oxide thin film such as cadmium oxide, gallium oxide, or titanium oxide. Moreover, the 1st detection electrode 14 and the 2nd detection electrode 18 may be comprised by metal nanowire particles, such as metal oxide particles, metal pastes, such as silver paste or copper paste, silver nanowire, and copper nanowire. Among these, silver nanowires are preferable because they are excellent in conductivity and transparency.
In addition, the patterning of the electrode part can be selected according to the material of the electrode part. In the case of a metal paste, a screen printing method or an ink jet printing method is used. Are preferably used.

The first lead wiring 16 and the second lead wiring 20 are members that play a role in applying a voltage to the first detection electrode 14 and the second detection electrode 18, respectively.
The first lead-out wiring 16 is disposed on the support 12 in the outer region EO, one end of which is electrically connected to the corresponding first detection electrode 14, and the other end is an external continuity in which a flexible printed wiring board or the like is disposed. It is located in the region G _I.
The second lead-out wiring 20 is disposed on the support 12 in the outer region EO, one end of which is electrically connected to the corresponding second detection electrode 18, and the other end is an external continuity in which a flexible printed wiring board or the like is disposed. It is located in the region G _I.
In FIG. 8, five first extraction wirings 16 and five second extraction wirings 20 are described, but the number is not particularly limited, and usually a plurality of the first extraction wirings 16 are arranged according to the number of detection electrodes. The

Examples of the wiring material constituting the first lead-out wiring 16 and the second lead-out wiring 20 include metals such as gold (Au), silver (Ag), and copper (Cu), tin oxide, zinc oxide, cadmium oxide, Examples thereof include metal oxides such as gallium oxide and titanium oxide. Among these, silver is preferable because of its excellent conductivity. Moreover, you may be comprised by metal or alloy thin films, such as metal pastes, such as a silver paste and a copper paste, aluminum (Al), molybdenum (Mo), and palladium (Pd). In the case of a metal paste, a screen printing or ink jet printing method is used, and in the case of a metal or alloy thin film, a patterning method such as a photolithography method is suitably used for the sputtered film.
In addition, it is preferable that the binder is contained in the 1st lead-out wiring 16 and the 2nd lead-out wiring 20 from the point which adhesiveness with the support body 12 is more excellent. The kind of binder is as above-mentioned.

The external conductive region G _I in FIG. 8, is disposed the flexible printed wiring board (not shown). The flexible printed wiring board is a board in which a plurality of wirings and terminals are provided on a substrate, and is connected to the other end of each of the first lead-out wirings 16 and the other end of each of the second lead-out wirings 20, and is a touch sensor. It plays a role of connecting 300 and an external device (for example, an image display panel).

<< Touch sensor manufacturing method >>
The manufacturing method of the touch sensor 300 is not particularly limited, and a known method can be adopted. As an example thereof, as a method of manufacturing the detection electrode and the lead-out wiring, a photoresist film on the metal foil formed on both main surfaces of the support 12 is exposed and developed to form a resist pattern. There is a method of etching the exposed metal foil. Further, a method of printing a paste containing metal fine particles or metal nanowires on both main surfaces of the support 12 and performing metal plating on the paste can be mentioned. Moreover, the method of printing and forming on the support body 12 by a screen printing plate or a gravure printing plate, or the method of forming by an inkjet is also mentioned.

Furthermore, in addition to the above method, a method using silver halide can be mentioned. More specifically, first, silver halide is used as a method of forming the first detection electrode 14 and the first lead wiring 16 and the second detection electrode 18 and the second lead wiring 20 on the support 12. Method. More specifically, the step (1) of forming a silver halide emulsion layer (hereinafter also simply referred to as a photosensitive layer) containing silver halide and gelatin on both surfaces of the support 12 respectively, Examples of the method include a step (2) of forming the first detection electrode 14 and the first lead wiring 16, and the second detection electrode 18 and the second lead wiring 20 by developing after the exposure.
Below, each process is demonstrated.

[Step (1): Photosensitive layer forming step]
Step (1) is a step of forming a photosensitive layer containing silver halide and gelatin on both surfaces of the support 12.
The method for forming the photosensitive layer is not particularly limited, but from the viewpoint of productivity, the photosensitive layer forming composition containing silver halide and a binder is brought into contact with the support 12 and photosensitive on both sides of the support 12. A method of forming a conductive layer is preferred.
Below, after explaining in full detail the aspect of the composition for photosensitive layer formation used with the said method, the procedure of a process is explained in full detail.

The composition for forming a photosensitive layer contains silver halide and gelatin.
The halogen element contained in the silver halide may be any of chlorine, bromine, iodine and fluorine, or a combination thereof. As the silver halide, for example, silver halides mainly composed of silver chloride, silver bromide and silver iodide are preferably used, and silver halides mainly composed of silver bromide and silver chloride are preferably used.
As gelatin, acid-processed gelatin may be used in addition to lime-processed gelatin, gelatin hydrolyzate, gelatin enzyme decomposition product, and other gelatins modified with amino groups and carboxyl groups (phthalated gelatin, acetylated gelatin), etc. Is mentioned.
The volume ratio of silver halide and gelatin contained in the composition for forming a photosensitive layer is not particularly limited, and is appropriately adjusted so as to be within a suitable volume ratio range of the metal and the binder in the conductive thin wire 30 described above. Is done.

The composition for forming a photosensitive layer contains a solvent, if necessary.
Examples of the solvent used include water, organic solvents (for example, alcohols such as methanol, ketones such as acetone, amides such as formamide, sulfoxides such as dimethyl sulfoxide, esters such as ethyl acetate, ethers, and the like. Etc.), ionic liquids, or mixed solvents thereof.
The content of the solvent used is not particularly limited, but is preferably in the range of 30 to 90% by mass and more preferably in the range of 50 to 80% by mass with respect to the total mass of the silver halide and the binder.

[Process procedure]
The method for bringing the composition for forming a photosensitive layer into contact with the support 12 is not particularly limited, and a known method can be employed. For example, the method of apply | coating the composition for photosensitive layer formation to the support body 12, the method of immersing the support body 12 in the composition for photosensitive layer formation, etc. are mentioned.
The content of the silver halide in the photosensitive layer is not particularly limited, but is preferably 1.0 to 20.0 g / m ^{2 in} terms of silver, and preferably 5.0 to 15.0 g / m in terms of more excellent conductive properties. ² is more preferable.

In addition to the photosensitive layer, the following undercoat layer, antihalation layer, and protective layer may be provided as necessary.
Moreover, the adhesiveness of a support body and a photosensitive layer improves by providing an undercoat layer. By providing the antihalation layer, it is easy to make the conductive fine wires thinner. Further, by providing a protective layer, scratch prevention and mechanical properties are improved.

(Undercoat layer)
An undercoat layer may be provided to improve the adhesion with the photosensitive layer.
Synthetic materials such as phenolic, alkyd, melamine, urea, vinyl, epoxy, polyester, polyurethane, acrylic, etc. as an undercoat layer to improve adhesion to the photosensitive layer Examples of the resin include urethane. Examples of commercially available products include Takelac WS5100, Takelac WS4000 (both manufactured by Mitsui Takeda Chemical Co., Ltd.) and the like. Moreover, as other resin other than the synthetic resin, gelatin and the like can be exemplified.
In addition to the resin component, if necessary, a crosslinking agent (Epocross WS300, Epocross WS700 (both manufactured by Nippon Shokubai Co., Ltd.), Carbodilite V-02-L2 (Nisshinbo Chemical Co., Ltd.)), a film-forming aid, a matting agent (Snowtex UP (manufactured by Nissan Chemical Industries, Ltd.)), lubricant (Cerosol 524 (manufactured by Chukyo Yushi Co., Ltd.), etc.), surfactant (Naroacty CL95 (manufactured by Sanyo Chemical Industries), Rapisol A-90 (manufactured by NOF Corporation) Etc.), antifoaming agents, antifoaming agents, dyes, fluorescent brightening agents, preservatives, water-proofing agents, antistatic agents, crosslinker catalysts (Cat 64 (Daiichi Kogyo Seiyaku Co., Ltd.), etc.), etc. May be.

  The thickness of the undercoat layer is 10 to 400 nm, preferably 10 to 200 nm, more preferably 10 to 100 nm, and still more preferably 20 to 100 nm. By setting the thickness to 10 nm or more, it becomes possible to absorb the peeling stress and suppress the destruction of the photosensitive layer. Further, by setting the thickness to 400 nm or less, the undercoat layer is deformed and cohesive failure of the support is suppressed.

  The surface roughness Ra of the surface of the undercoat layer is 0.5 to 30 nm, preferably 0.5 to 25 nm, more preferably 1 to 25 nm, and still more preferably 10 to 20 nm. When the surface roughness Ra is 0.5 nm or more, the contact area increases and the adhesion can be improved. On the other hand, when the surface roughness (Ra) is 30 nm or less, peeling stress does not concentrate due to the unevenness of the resin layer, and adhesion failure is unlikely to occur. The surface roughness Ra can be measured using, for example, a laser microscope.

(Formation method of undercoat layer)
The undercoat layer may be formed by any of the coating method and the coextrusion method, and the coating method is preferable from the viewpoint that the material selection range is wide and heat resistance does not have to be taken into consideration in the melting stage.
First, a solution containing a resin constituting the undercoat layer or a coating solution prepared by mixing a latex aqueous solution is mixed and phase-separated, and a solution in which particles are dispersed in the resin is applied. When drying after that, it is preferable to give a temperature difference of 1 to 100 ° C. to the coating film and the ambient temperature, more preferably 3 to 80 ° C., and further preferably 5 to 60 ° C. By giving such a temperature difference, convection is generated inside the coating layer due to drying of the solvent inside the resin layer, the film where the solvent volatilization proceeds becomes thin, and the film where the solvent diffusion is difficult to proceed is a film. Concavities and convexities are formed in the coating film where the thickness increases. The atmospheric temperature refers to the temperature of the outside air of 30 cm from the coating surface when the undercoat layer is formed. In addition, as needed, it can also be set as predetermined surface roughness Ra by pressing the base material which has an unevenness | corrugation to a coating surface, and transferring an unevenness | corrugation.

また、視認性向上の観点から、アンチハレーション層の厚みは、０．２〜１０μｍであることが好ましく、０．５〜５μｍであることが特に好ましい。 (Anti-halation layer)
An antihalation layer may be provided in order to facilitate thinning of the conductive thin wire.
In order to impart an antihalation function, it is preferable to add a dye. As examples of the dye, the dyes described in [0064] to [0068] of JP2012-6377A can be used, and among them, the following solid disperse dye A is preferable.
Solid disperse dye A

Further, from the viewpoint of improving visibility, the thickness of the antihalation layer is preferably 0.2 to 10 μm, and particularly preferably 0.5 to 5 μm.

The contact angle of water on the surface of the antihalation layer is preferably 70 degrees or less, more preferably 60 degrees or less, and further preferably 55 degrees or less.
Moreover, it is preferable from a viewpoint which can make the contact angle of water into the said range containing a hydrophilic resin. The preferred embodiment of the hydrophilic resin is the same as the preferred embodiment of the hydrophilic resin that can be used for the photosensitive material for the transparent conductive layer. Among the hydrophilic resins, it is more preferable to contain gelatin.

[Step (2): Exposure and development step]
In the step (2), the photosensitive layer obtained in the above step (1) is subjected to pattern exposure and then developed to thereby perform the first detection electrode 14 and the first lead wiring 16, and the second detection electrode 18 and the second detection electrode. This is a step of forming the two lead wirings 20.
Hereinafter, the pattern exposure process will be described in detail, and then the development process will be described in detail.

(Pattern exposure)
By subjecting the photosensitive layer to pattern exposure, the silver halide in the photosensitive layer in the exposed region forms a latent image. In the region where the latent image is formed, the first detection electrode 14 and the first lead-out wiring 16, and the second detection electrode 18 and the second lead-out wiring 20 are formed by a development process described later. On the other hand, in an unexposed area that has not been exposed, the silver halide dissolves and flows out of the photosensitive layer during the fixing process described later, and a transparent film is obtained.
The light source used in the exposure is not particularly limited, and examples thereof include light such as visible light and ultraviolet light, and radiation such as X-rays.
The method for performing pattern exposure is not particularly limited. For example, surface exposure using a photomask may be performed, or scanning exposure using a laser beam may be performed. The shape of the pattern is not particularly limited, and is appropriately adjusted according to the pattern of the conductive fine wire to be formed.

(Development processing)
The development processing method is not particularly limited, and a known method can be employed. For example, a usual development processing technique used for silver salt photographic film, photographic paper, film for printing plate making, emulsion mask for photomask, and the like can be used.
The type of the developer used in the development process is not particularly limited. For example, PQ developer, MQ developer, MAA developer and the like can be used. Commercially available products include, for example, CN-16, CR-56, CP45X, FD-3, Papitol, C-41, E-6, RA-4, D-19, D-72 prescribed by KODAK. Or a developer contained in a kit thereof can be used. A rinse developer can also be used.
The development process can include a fixing process performed for the purpose of removing and stabilizing the silver salt in the unexposed part. For the fixing process, a technique of fixing process used for silver salt photographic film, photographic paper, film for printing plate making, emulsion mask for photomask, and the like can be used.
The fixing temperature in the fixing step is preferably about 20 ° C. to about 50 ° C., and more preferably 25 to 45 ° C. The fixing time is preferably 5 seconds to 1 minute, and more preferably 7 seconds to 50 seconds.
The mass of the metallic silver contained in the exposed area (conductive thin wire) after the development treatment is preferably a content of 50% by mass or more based on the mass of silver contained in the exposed area before the exposure, More preferably, it is at least mass%. If the mass of silver contained in the exposed portion is 50% by mass or more based on the mass of silver contained in the exposed portion before exposure, it is preferable because high conductivity can be obtained.

[Step (3): Heating step]
Step (3) is a step of performing heat treatment after the development processing. By performing this step, fusion occurs between the binders, and the hardness of the conductive thin wires 34 is further increased. In particular, when polymer particles are dispersed as a binder in the composition for forming a photosensitive layer (when the binder is polymer particles in latex), by performing this step, fusion occurs between the polymer particles, Conductive thin wires 30 having a desired hardness are formed.
The conditions for the heat treatment are appropriately selected depending on the binder used, but it is preferably 40 ° C. or higher from the viewpoint of the film forming temperature of the polymer particles, more preferably 50 ° C. or higher, and further 60 ° C. or higher. preferable. Further, from the viewpoint of suppressing curling of the substrate, 180 ° C. or lower is preferable, and 140 ° C. or lower is more preferable.
The heating time is not particularly limited, but is preferably 1 to 5 minutes and more preferably 1 to 3 minutes from the viewpoint of suppressing curling of the substrate and the productivity.
In addition, since this heat treatment can be combined with a drying step usually performed after exposure and development processing, it is not necessary to increase a new step for film formation of polymer particles, and productivity, cost, etc. Excellent from a viewpoint.

  The features of the present invention will be described more specifically with reference to examples and comparative examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the specific examples shown below.

(Preparation of glass substrate G1)
Glass GORILLA-IOX (manufactured by Corning) having a thickness of 550 μm was used as the glass substrate G1.

(Preparation of adhesive film AD1)
A highly transparent adhesive transfer tape 8146-1 (manufactured by 3M) having a 25 μm thick adhesive layer D1 sandwiched between two peeled PET films was prepared and used as an adhesive film AD1.

(Preparation of support S1)
A polyethylene terephthalate resin having an intrinsic viscosity of 0.66 polycondensed using antimony trioxide as a main catalyst was dried to a moisture content of 50 ppm (mg / L) or less and melted in an extruder set at a heater temperature of 280 to 300 ° C. The melted PET resin is discharged from a die part onto a chill roll electrostatically applied to obtain an amorphous base. The obtained amorphous base was stretched 3.3 times in the base traveling direction and then stretched 3.8 times in the width direction to produce a support S1 having a thickness of 96 μm.

(Preparation of support S2)
Arton film G7810 (manufactured by JSR) having a thickness of 40 μm was prepared and used as the support S2.

(Preparation of support S3)
A triacetyl cellulose film having a thickness of 40 μm: TD40UL (manufactured by FUJIFILM Corporation) was prepared and used as the support S3.

(Preparation of support S4)
A release PET film (Panapeel NP-75-A, manufactured by Panac Co., Ltd.) was prepared and used as the support S4.

(Preparation of support S5)
A ZEONOR film having a thickness of 40 μm: ZF16 (manufactured by Nippon Zeon Co., Ltd.) was prepared and used as the support S5.

(Preparation of support S6)
Polyester film having a thickness of 6 μm: Lumirror for magnetic material (manufactured by Toray Industries, Inc.) was prepared and used as support S6.

(Preparation of support S7)
Two support bodies S6 were prepared, and each slow axis was detected using the phase difference measuring apparatus KOBRA-WR (made by Oji Scientific Instruments). One peeling PET of adhesive film AD1 was peeled off, and adhesive layer D1 was bonded on one support body S6 using a roller, and the other peeling PET was peeled off. Then, the other support body S6 was bonded using a roller so that the slow axis of two support bodies S6 might correspond, and it used as support body S7.

(Preparation of support S8)
A polyester film having a thickness of 38 μm: A4300 (manufactured by Toyobo Co., Ltd.) was prepared and used as the support S8.

<Preparation of undercoat layer coating solution PC-1>
Urethane resin: Takelac WS5100 (manufactured by Mitsui Takeda Chemical Co., Ltd.) 2.88 parts by mass Crosslinker: Epocross WS300 (manufactured by Nippon Shokubai Co., Ltd.) 0.96 parts by mass Crosslinker: Carbodilite V-02-L2 (Nisshinbo Chemical Co., Ltd.) 0. 44 parts by mass fine particles: Snowtex UP (manufactured by Nissan Chemical Co., Ltd.) 0.06 parts by mass Lubricant: Cellosol 524 (manufactured by Chukyo Yushi Co., Ltd.) 0.15 parts by mass Surfactant: NAROACTY CL95 (manufactured by Sanyo Chemical Industries) 0. 02 parts by mass surfactant: Lapisol A-90 (manufactured by NOF Corporation) 0.02 parts by mass water 95.47 parts by mass

<Preparation of coating solution AH-1 for antihalation layer>
Water 1000 parts by weight Gelatin 12 parts by weight Dye D-1 10 parts by weight

(Preparation of protective layer coating solution PR-1)
Water 1000 parts by weight Gelatin 12 parts by weight

(Preparation of silver halide emulsion solution EM-1)
The following composition was charged into a mixing tank and stirred to obtain a silver halide emulsion liquid EM-1.
Liquid EM-1 for silver halide layer
Water 750 parts by weight Gelatin 9 parts by weight Sodium chloride 3 parts by weight 1,3-dimethylimidazolidine-2-thione 0.02 parts by weight Sodium benzenethiosulfonate 0.01 part by weight Citric acid 0.7 parts by weight

(Preparation of silver halide emulsion solution EM-2)
The following composition was added to a mixing tank and stirred to obtain a silver halide emulsion liquid EM-2.
EM-2 for silver halide emulsion
Water 300 parts by weight Silver nitrate 150 parts by weight

(Preparation of silver halide emulsion liquid EM-3)
The following composition was charged into a mixing tank and stirred to obtain a silver halide emulsion liquid EM-3.
Liquid EM-3 for silver halide emulsion
Water 300 parts by mass Sodium chloride 38 parts by mass Potassium bromide 32 parts by mass Potassium hexachloroiridium (III) 20% by mass aqueous solution (0.005% by mass KCl)
8 parts by mass ammonium hexachlororhodate 20% by mass aqueous solution (0.001% by mass NaCl)
10 parts by mass

(Preparation of silver halide emulsion liquid EM-4)
The following composition was added to a mixing tank and stirred to obtain a silver halide emulsion liquid EM-4.
EM-4 for silver halide emulsion
Water 100 parts by weight Silver nitrate 50 parts by weight

(Preparation of silver halide emulsion solution EM-5)
The following composition was added to a mixing tank and stirred to obtain a silver halide emulsion liquid EM-5.
EM-5 for silver halide emulsion
Water 100 parts by mass Sodium chloride 13 parts by mass Potassium bromide 11 parts by mass Yellow blood salt 0.005 parts by mass

(Preparation of photosensitive layer coating liquid PS-1)
In the following silver halide emulsion liquid EM-1 maintained at 38 ° C. and pH 4.5, an amount corresponding to 90% by mass of each of the above-described silver halide emulsion liquid EM-2 and silver halide emulsion liquid EM-3 was added. Simultaneously added over 20 minutes with stirring to form 0.16 μm core particles. Subsequently, the silver halide emulsion liquid EM-4 and the silver halide emulsion liquid EM-5 are added over 8 minutes, and the remaining silver halide emulsion liquid EM-2 and the remaining silver halide emulsion liquid EM-3 are further added. An amount of 10% by weight was added over 2 minutes and grown to 0.21 μm. Further, 0.15 g of potassium iodide was added and ripened for 5 minutes to complete the grain formation.
Then, it washed with water by the flocculation method according to a conventional method. Specifically, the temperature was lowered to 35 ° C., and the pH was lowered using sulfuric acid until the silver halide precipitated (the pH was in the range of 3.6 ± 0.2). Next, about 3 liters of the supernatant was removed (first water washing). Further, 3 liters of distilled water was added, and sulfuric acid was added until the silver halide settled. Again, 3 liters of the supernatant was removed (second water wash). The same operation as the second water washing was further repeated once (third water washing) to complete the water washing / desalting step. The emulsion after washing with water and desalting was adjusted to pH 6.4 and pAg 7.5, and gelatin 3.9 g, sodium benzenethiosulfonate 10 mg, sodium benzenethiosulfinate 3 mg, sodium thiosulfate 15 mg and chloroauric acid 10 mg were added. Chemical sensitization is performed to obtain an optimum sensitivity at 0 ° C., and 100 mg of 1,3,3a, 7-tetraazaindene is added as a stabilizer and 100 mg of proxel (trade name, manufactured by ICI Co., Ltd.) is used as a preservative. It was. The finally obtained emulsion contains 0.08 mol% of silver iodide, and the ratio of silver chlorobromide is 70 mol% of silver chloride and 30 mol% of silver bromide. It was a silver iodochlorobromide cubic grain emulsion having a coefficient of 9%.
1,3,3a, 7-tetraazaindene 1.2 × 10 ⁻⁴ mol / mol Ag, hydroquinone 1.2 × 10 ⁻² mol / mol Ag, citric acid 3.0 × 10 ⁻⁴ mol / Mol Ag, 2,4-dichloro-6-hydroxy-1,3,5-triazine sodium salt 0.90 g / mol Ag was added, and the coating solution pH was adjusted to 5.6 using citric acid, A coating liquid PS-1 for photosensitive layer was obtained.

(Preparation of developer DV-1)
The following composition was added to the mixing tank and stirred to obtain developer DV-1.
Developer DV-1
1000g of water
Hydroquinone 0.037 mol
N-methylaminophenol 0.016 mol
Sodium metaborate 0.140 mol
Sodium hydroxide 0.360 mol
Sodium bromide 0.031 mol
Potassium metabisulfite 0.187 mol

(Production of touch sensor film T1)
After performing corona discharge treatment on both sides of the support S2 at 8 kJ / m ² , the above-mentioned undercoat layer coating solution PC-1 is coated on both sides and dried at a film surface temperature of 90 ° C. for 1 minute to obtain a thickness. A 0.1 μm subbing layer was formed. Next, the antihalation layer coating solution AH-1 was coated on both sides and dried to provide an antihalation layer having a thickness of 1.0 μm. Further, the photosensitive layer coating liquid PS-1 is coated on both sides and dried to form a photosensitive layer, and then the protective layer coating liquid PR-1 is coated on both sides and dried to obtain a thickness. A protective layer of 0.15 μm was provided. Here, the optical density of the antihalation layer was about 1.0, and the amount of silver in the photosensitive layer was 7 g / m ² in terms of silver.

A high pressure mercury lamp is provided via a photomask having a touch sensor pattern (first detection electrode and second detection electrode) and a lead wiring portion (first lead wiring and second lead wiring) as shown in FIG. The exposure was performed using parallel light using as a light source. After the exposure, the film was developed with the developer DV-1 described above, and further developed using a fixing solution (trade name: N3X-R for CN16X, manufactured by Fuji Film Co., Ltd.). Furthermore, the touch sensor film T1 which has the detection electrode which has a mesh pattern which consists of Ag fine wire on both surfaces was obtained by rinsing with pure water and drying.
The arranged first detection electrodes are electrodes extending in the X direction, the second detection electrodes are electrodes extending in the Y direction, 32 X detection electrodes (length: 170 mm), and Y detection electrodes (length: 300 mm) was 56. Moreover, Re40 measured using phase difference measuring apparatus KOBRA-WR (made by Oji Scientific Instruments) was 3 nm.

(Preparation of undercoat layer coating solution PC-2)
Undercoat layer coating solution PC-2
-Urethane acrylate 100.0 parts by mass (reaction product of pentaerythritol acrylate and hydrogenated xylene diisocyanate)
Monomer (A-9300 (manufactured by Shin-Nakamura Chemical)) 20.0 parts by mass Silica particles (average particle size 1 to 3 μm) 84.2 parts by mass Photopolymerization initiator (IRGACURE184, manufactured by BASF) 6.3 Part by mass / solvent (butyl acetate) 85.7 parts by mass / solvent (methyl ethyl ketone) 171.4 parts by mass

(Synthesis of polymer P-1)
The following composition was stirred in the mixing tank and polymerized at a temperature of 60 ° C. to 100 ° C. to obtain a 45 mass% PGMEA solution (solid content concentration) of the following polymer P1. The molecular weight was measured using gel permeation chromatography (GPC). As a result, the weight average molecular weight (Mw) in terms of polystyrene was 30,000, and the molecular weight distribution (Mw / Mn) was 2.21. Furthermore, it diluted with PGMEA, and obtained the PGMEA 40 mass% solution of the polymer P1.
Polymer P-1 synthesis solution monomer (methacrylic acid) 7.8 parts by mass monomer (benzyl methacrylate) 37.2 parts by mass polymerization initiator (ABN-R (manufactured by Nippon Finechem)) 0.5 part by mass solvent (PGMEA: Methoxypropyl acetate) 55.0 parts by mass

(Preparation of photosensitive layer coating liquid PS-2)
The following composition was added to the mixing tank and stirred to obtain a photosensitive layer coating solution PS-2.
Photosensitive layer coating solution PS-2
Polymer solution (PGMEA 40% by mass solution of polymer P-1) 3.80 parts by mass monomer (KAYARAD DPHA (manufactured by Nippon Kayaku Co., Ltd.)) 1.59 parts by mass photopolymerization initiator (IRGACURE 379 (manufactured by BASF)) 0.16 Mass part cross-linking agent (EHPE-3150 (manufactured by Daicel Chemical Industries)) 0.15 parts by mass surfactant (Megafac F781F (manufactured by DIC)) 0.002 parts by mass Solvent (PGMEA) 19.3 parts by mass

(Preparation of touch sensor film T2)
The undercoat layer coating solution PC-2 is applied to the surface of the support S2 by the gravure reverse method, dried at 70 ° C. for 40 seconds, and irradiated with UV at 300 mJ / cm ² to obtain a film thickness of 1.7 μm below. A coating layer was formed. Thereafter, the surface of the undercoat layer was subjected to plasma treatment at an Ar flow rate of 300 sccm and an output of 700 V / 0.05 A, placed in a sputtering apparatus, and heated to 140 ° C. while evacuating to a pressure of 2 × 10 ^{− On} the surface subjected to plasma treatment of the film by sputtering using an oxide mixture having a mass ratio of In ₂ O ₃ / SnO ₃ = 90/10 as a target under argon gas and oxygen gas inflow. A transparent conductive layer made of ITO was laminated at a thickness of 200 Å to obtain a conductive transparent film.
On the ITO layer of the transparent conductive film, a photosensitive layer coating solution PS-2 was applied using a wire bar and then dried in an oven at 150 ° C. for 5 minutes to obtain a photosensitive layer having a thickness of 5 μm. .
Next, using an exposure glass mask capable of forming the same detection electrode as that of the touch sensor T1, a high-pressure mercury lamp i-line (wavelength 365 nm) is exposed to 400 mJ / cm ² (illuminance 50 mW / cm ² ) and then 1% by mass sodium hydroxide. The film was developed with an aqueous solution (35 ° C.) and a shower pressure of 0.08 MPa for 1 minute, rinsed with a shower of pure water, and then dried at 50 ° C. for 1 minute.
Subsequently, after immersion in an aqueous 3% by mass oxalic acid solution (35 ° C.) for 2 minutes and ITO etching treatment, the water on the sample surface was blown off with an air knife and then dried at 60 ° C. for 5 minutes.
Further, after 2.75 mass% tetramethylammonium hydroxide aqueous solution (35 ° C.) and shower pressure of 3.0 MPa for 75 seconds, the sample was rinsed with pure water shower, and then water on the sample surface was blown off with an air knife. The electrode pattern was formed by drying at 60 ° C. for 5 minutes.
Incidentally, a transparent conductive film X1 having an electrode pattern in which 32 detection electrodes (length: 170 mm) extend in the X direction and a transparent conductive film Y1 in which 56 detection electrodes (length: 300 mm) extend in the Y direction, respectively. One by one was produced.
Finally, using adhesive film AD1 having transparent conductive film X1, transparent conductive film Y1, adhesive layer D1, support S2 / ITO layer (Y direction) / adhesion layer D1 / support S2 / ITO layer (X direction) The laminated body comprised in order of these was produced, and touch sensor film T2 was obtained.
Here, it laminated | stacked so that the angle which the slow axis of two support body S2 in touch sensor film T2 makes might be set to 0 degree. Moreover, Re40 measured using phase difference measuring apparatus KOBRA-WR (made by Oji Scientific Instruments) was 3 nm.

(Production of touch sensor T3)
The touch sensor film T3 produced by the same method as the touch sensor film T1 was obtained except that the support S5 was used. Re40 measured using the phase difference measuring device KOBRA-WR (made by Oji Scientific Instruments) was 5 nm.

(Production of touch sensor T4)
A touch sensor film T4 produced in the same manner as the touch sensor film T1 was obtained except that the support S6 was used. Re40 measured using a phase difference measuring device KOBRA-WR (manufactured by Oji Scientific Instruments) was 480 nm.

(Production of touch sensor T5)
A touch sensor film T5 produced in the same manner as the touch sensor film T1 was obtained except that the support S7 was used. Re40 measured using the phase difference measuring device KOBRA-WR (made by Oji Scientific Instruments) was 960 nm.

(Production of touch sensor T6)
A touch sensor film T6 produced in the same manner as the touch sensor film T1 was obtained except that the support S8 was used. Re40 measured using the phase difference measuring device KOBRA-WR (made by Oji Scientific Instruments) was 1150 nm.

(Preparation of hard coat layer coating solution HC-1)
The following composition was added to the mixing tank and stirred to obtain a hard coat layer coating solution HC-1.
Hard coat layer coating solution HC-1
Polymer (Acrybase MH-101-5 (manufactured by Fujikura Kasei)) 60 parts by mass photocurable monomer (A-DPH (manufactured by Shin-Nakamura Chemical Co., Ltd.)) 20 parts by mass photocurable monomer (A-TMMT (Shin-Nakamura Chemical) 20 parts by mass fine particles (MEK-ST-L (manufactured by Nissan Chemical Industries)) 200 parts by mass photopolymerization initiator (IRGACURE184 (manufactured by BASF)) 5 parts by mass surfactant (Megafac F-780F (DIC) 1) part by mass solvent (2-butanone (manufactured by Kanto Chemical Co.)) 54 parts by mass

(Preparation of hard coat layer coating solution HC-2)
The following composition was added to the mixing tank and stirred to obtain a hard coat layer coating solution HC-2.
Hard coat layer coating solution HC-2
Alkoxysilane (KBE-403 (manufactured by Shin-Etsu Chemical Co., Ltd.)) 80 parts by mass Alkoxysilane (KBE-04 (manufactured by Shin-Etsu Chemical Co., Ltd.)) 20 parts by mass Acid (1% by mass aqueous solution of industrial acetic acid (manufactured by Daicel Chemical Industries)) ) 200 parts by mass chelate complex (aluminum chelate D (manufactured by Kawaken Fine Chemical Co., Ltd.)) 25 parts by mass silica fine particles (Snowtex OL (manufactured by Nissan Chemical Industries)) 100 parts by mass surfactant (Sanded BL (Sanyo Chemical Industries) 1% by weight aqueous solution) 20 parts by weight surfactant (Naroacty CL-95 (manufactured by Sanyo Chemical Industries) 1% by weight aqueous solution)
20 parts by mass

(Preparation of orientation layer coating liquid AL-1)
The following composition was prepared and used as the alignment layer coating liquid AL-1.
Coating liquid AL-1 for alignment layer
Polymer (PVA205 (manufactured by Kuraray)) 7 parts by mass Polymer (Luvitec K30 (manufactured by BASF)) 3 parts by mass Solvent (pure water) 120 parts by mass Solvent (methanol (manufactured by Kanto Chemical)) 80 parts by mass

(Preparation of orientation layer coating liquid AL-2)
The following composition was prepared and used as alignment layer coating liquid AL-2. Compound A-1 was produced according to the method described in Japanese Patent No. 3907735.
Coating liquid AL-2 for alignment layer
Polymer (Compound A-1) 10 parts by mass crosslinking agent (50% by mass aqueous solution of glutaraldehyde (manufactured by Kanto Chemical Co.)) 1 part by mass solvent (pure water) 180 parts by mass solvent (methanol (manufactured by Kanto Chemical Co.)) 60 parts by mass

(Preparation of coating liquid LC-1 for optical anisotropic layer)
The following composition was prepared and used as the optically anisotropic layer coating liquid LC-1.
Optical anisotropic coating liquid LC-1
Polymerizable liquid crystal monomer (LC-242 (manufactured by BASF)) 100 parts by mass Photopolymerization initiator (IRGACUREOXE02 (manufactured by BASF)) 5 parts by mass of surfactant (Megafac F-780F (manufactured by DIC)) 1 part by mass Solvent (2-butanone (manufactured by Kanto Chemical Co.)) 540 parts by mass

(Preparation of coating liquid LC-2 for optical anisotropic layer)
The following composition was prepared and used as optically anisotropic layer coating liquid LC-2.
Optical anisotropic layer coating liquid LC-2
Polymerizable liquid crystal monomer (RM-257 (manufactured by MERCK)) 60 parts by mass Polymerizable liquid crystal monomer (LC-242 (manufactured by BASF)) 40 parts by mass Photopolymerization initiator (IRGACUREOXE02 (manufactured by BASF)) 5 parts by mass interface Activator (Megafac F-780F (manufactured by DIC)) 1 part by mass solvent (2-butanone (manufactured by Kanto Chemical Co.)) 510 parts by mass solvent (cyclohexanone (manufactured by Kanto Chemical Co.)) 30 parts by mass

(Preparation of optical anisotropic layer coating liquid LC-3)
The following composition was prepared and used as the optically anisotropic layer coating liquid LC-3. Compound L-2 was obtained from Tetrahedron Lett. Magazine, volume 43, page 6793 (2002).
Optical anisotropic layer coating liquid LC-3
Polymerizable liquid crystal monomer (Compound L-1) 60 parts by weight Polymerizable liquid crystal monomer (RM-257 (manufactured by MERCK)) 40 parts by weight photopolymerization initiator (IRGACURE819 (manufactured by BASF)) 5 parts by weight surfactant (compound) L-2) 1 part by mass solvent (2-butanone (manufactured by Kanto Chemical Co.)) 510 parts by mass solvent (cyclohexanone (manufactured by Kanto Chemical Co.)) 30 parts by mass

Example 1
<Formation of hard coat layer H1>
On the support S1 as a temporary support, using a # 10 wire bar, the hard coat layer coating solution HC-1 was applied, dried at 90 ° C. for 2 minutes, and then an oxygen concentration of 1.0% or less. Using a 160 W / cm air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.) under a nitrogen atmosphere, UV irradiation is performed with a light amount of 100 mJ / cm ² to form a 5.2 μm thick hard coat layer H1. did.

<Formation of alignment layer A1>
On the hard coat layer H1, using the # 8 wire bar, the orientation layer coating liquid AL-1 is applied, dried at 60 ° C. for 1 minute, and further at 90 ° C. for 2 minutes, and the thickness is 0.5 μm. Layer A1 was formed.

<Formation of optical anisotropic layer L1>
After the alignment layer A1 is rubbed, the optically anisotropic layer coating liquid LC-1 is applied using a # 4 wire bar, dried at a film surface temperature of 80 ° C. for 2 minutes to obtain a liquid crystal phase, and an oxygen concentration of 1 Using a 160 W / cm air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.) under a nitrogen atmosphere of 0% or less, UV irradiation is performed with a light amount of 100 mJ / cm ² to fix the orientation state, An optically anisotropic layer L1 having a thickness of 0.8 μm was formed. Here, the coating direction was the slow axis direction of the support, and the rubbing direction was 45 ° with respect to the coating direction.

<Formation of adhesive layer D1>
One release PET of the adhesive film AD1 is peeled off, the adhesive layer D1 is bonded onto the optical anisotropic layer L1 using a roller, the other release PET is peeled off, and the optical anisotropic of Example 1 is peeled off. A hard coat transfer film was obtained.

(Example 2)
In Example 1, instead of forming the optical anisotropic layer L1 using the # 4 wire bar, except that the optical anisotropic layer L2 having a thickness of 0.1 μm was formed using the # 0.7 wire bar, An optically anisotropic hard coat transfer film of Example 2 was produced in the same manner as in Example 1.

(Example 3)
In Example 1, instead of forming the optical anisotropic layer L1 using the # 4 wire bar, Example 1 except that the optical anisotropic layer L3 having a thickness of 0.2 μm was formed using the # 1 wire bar. 1 was used to produce an optically anisotropic hard coat transfer film of Example 3.

Example 4
In Example 1, instead of forming the optical anisotropic layer L1 using the # 4 wire bar, the optical anisotropic layer L4 having a thickness of 0.2 μm was formed using the # 2 wire bar. 1 was used to prepare an optically anisotropic hard coat transfer film of Example 4.

(Example 5)
In Example 1, instead of forming the optically anisotropic layer L1 using the # 4 wire bar, the Example except that the optically anisotropic layer L5 having a thickness of 1.2 μm was formed using the # 6 wire bar. 1 was used to prepare an optically anisotropic hard coat transfer film of Example 5.

(Example 6)
In Example 1, instead of forming the optical anisotropic layer L1 using the # 4 wire bar, the optical anisotropic layer L6 having a thickness of 1.4 μm was formed using the # 7 wire bar. 1 was used to prepare an optically anisotropic hard coat transfer film of Example 6.

(Example 7)
In Example 1, instead of forming the optical anisotropic layer L1 using the # 4 wire bar, the optical anisotropic layer L7 having a thickness of 1.6 μm was formed using the # 8 wire bar. 1 was used to prepare an optically anisotropic hard coat transfer film of Example 7.

(Example 8)
In Example 1, instead of forming the hard coat layer H1, the optically anisotropic hard coat transfer film of Example 8 was prepared in the same manner as in Example 1 except that the hard coat layer H2 was formed by the following method. Produced.

<Formation of hard coat layer H2>
After corona treatment on the support S1 as a temporary support, the hard coat layer coating solution HC-2 was applied using a # 4 wire bar, dried at 90 ° C. for 2 minutes, and then 150 The hard coat layer H2 having a thickness of 1.0 μm was formed by drying at 0 ° C. for 2 minutes.

Example 9
In Example 1, instead of forming the alignment layer A1 using the alignment layer coating liquid AL-1, Example 1 except that the alignment layer A2 was formed using the alignment layer coating liquid AL-2. The optically anisotropic hard coat transfer film of Example 9 was produced in the same manner as described above.

(Example 10)
In Example 1, instead of forming the optical anisotropic layer L1 using the optical anisotropic layer coating liquid LC-1, the optical anisotropic layer L8 is formed using the optical anisotropic layer coating liquid LC-2. An optically anisotropic hard coat transfer film of Example 10 was produced in the same manner as in Example 1 except that it was formed.

(Example 11)
In Example 1, instead of forming the optical anisotropic layer L1 using the optical anisotropic layer coating liquid LC-1, the optical anisotropic layer L9 is formed using the optical anisotropic layer coating liquid LC-3. An optically anisotropic hard coat transfer film of Example 11 was produced in the same manner as in Example 1 except that it was formed.

(Example 12)
Example 1 Example 1 except that the hard coat layer H2 was formed on the optical anisotropic layer L1 in the same manner as in Example 8 after the optical anisotropic layer L1 was formed and before the adhesive layer D1 was formed. The optically anisotropic hard coat transfer film of Example 12 was produced in the same manner as described above.

(Example 13)
In Example 1, after forming the optical anisotropic layer L1 and before forming the adhesive layer D1, the optical anisotropic layer L3 was formed on the optical anisotropic layer L1 in the same manner as in Example 3, except that the optical anisotropic layer L3 was formed. 1 was used to produce an optically anisotropic hard coat transfer film of Example 13.

(Example 14)
In Example 1, the optically anisotropic hard coat transfer film of Example 14 was produced in the same manner as in Example 1 except that the surface of the hard coat layer H1 was rubbed without forming the alignment layer A1. .

(Example 15)
After rubbing the support S1 as a temporary support, the optically anisotropic layer L1, the hard coat layer H1, and the adhesive layer D1 are formed in this order in the same manner as in Example 1, and the optically anisotropic layer of Example 15 is formed. An isotropic hard coat transfer film was prepared.

(Example 16)
In Example 1, the optically anisotropic hard coat transfer film of Example 16 was produced in the same manner as in Example 1 except that the support S1 as the temporary support was replaced with the support S2.

(Example 17)
In Example 1, the optically anisotropic hard coat transfer film of Example 17 was produced in the same manner as in Example 1 except that the support S1 as the temporary support was replaced with the support S3.

(Example 18)
In Example 1, the optically anisotropic hard coat transfer film of Example 18 was produced in the same manner as in Example 1 except that the support S1 as the temporary support was replaced with the support S4.

(Example 19)
In Example 18, the same procedure as in Example 18 was performed except that the alignment layer A1, the optically anisotropic layer L1, and the hard coat layer H1 were formed in this order on the support S4 as a temporary support in the same manner as in Example 1. Thus, an optically anisotropic hard coat transfer film of Example 19 was produced.

(Comparative Example 1)
After rubbing the support S1 as a temporary support, the optically anisotropic layer L1 and the adhesive layer D1 are formed in this order in the same manner as in Example 1, and the optical anisotropic hard coat transfer of Comparative Example 1 is performed. A film was prepared.

(Comparative Example 2)
A hard coat layer H1 and an adhesive layer D1 were formed in this order on the support S1 as a temporary support in the same manner as in Example 1 to produce an optically anisotropic hard coat transfer film of Comparative Example 2.

<Preparation of optical anisotropic hard coat transfer film evaluation sample>
The optically anisotropic layer L1 of the transfer film of the adhesive layer D1 of the transfer film of Examples 1 to 19 and Comparative Examples 1 and 2 and the glass substrate G1 are bonded using a roller, and any of the supports S1 to S4 I peeled. In order to prevent the generation of bubbles, the optical anisotropic hard coat transfer of Examples 1 to 19 and Comparative Examples 1 and 2 was performed by heating in an environment of 0.5 atm and 40 ° C. for 20 minutes and performing autoclave treatment. A sample for film evaluation was prepared.

<Production of touch panel>
The adhesive layers D1 of the optically anisotropic hard coat transfer films of Examples 1 to 19 and Comparative Examples 1 and 2 are bonded to one surface of the touch sensor film T1 using a roller, and the supports S1 to S4. Any one of was peeled off. At this time, the angle formed by the slow axis of the touch sensor film and the slow axis of the optically anisotropic layer was set to 45 °. Next, one peeling PET of adhesion film AD1 was peeled, and adhesion layer D1 (1st adhesion layer) was pasted on the other side of touch sensor film T1 using a roller. Subsequently, the other peeled PET is peeled off, and the glass substrate G1 is bonded using a roller, and then heated for 20 minutes in an environment of 0.5 atm and 40 ° C. in order to prevent the generation of bubbles. The touch panels of Examples 1 to 19 and Comparative Examples 1 and 2 were produced by applying an autoclave process.

(Example 20)
<Production of touch panel>
In Example 1, the touch panel of Example 20 was produced in the same manner as in Example 1 except that the touch sensor film T2 was used instead of the touch sensor film T1.

(Example 21)
<Production of touch panel>
In Example 1, the touch panel of Example 21 was produced in the same manner as in Example 1 except that the touch sensor film T3 was used instead of the touch sensor film T1.

(Example 22)
<Production of touch panel>
In Example 1, the touch panel of Example 22 was produced in the same manner as in Example 1 except that the touch sensor film T4 was used instead of the touch sensor film T1.

(Example 23)
<Production of touch panel>
In Example 1, the touch panel of Example 23 was produced by the same method as Example 1 except having used touch sensor film T5 instead of touch sensor film T1.

(Comparative Example 3)
<Preparation of optical anisotropic hard coat transfer film evaluation sample>
After further bonding the adhesive layer D1 of the optically anisotropic hard coat transfer film of Comparative Example 2 to the support S1 peeling surface during the production of the sample for evaluation of the optically anisotropic hard coat transfer film of Comparative Example 1 A sample for evaluating a hard coat transfer film of Comparative Example 3 was prepared in the same manner as in Comparative Example 1, except that the support S1 was peeled off. The comparative example 3 is an aspect which has the adhesion layer D1 between the hard-coat layer H1 and the optically anisotropic layer H1.

<Production of Touch Panel of Comparative Example 3>
After further bonding the adhesive layer D1 of the optically anisotropic hard coat transfer film of Comparative Example 2 to the support S1 peeling surface during the production of the sample for evaluation of the optically anisotropic hard coat transfer film of Comparative Example 1 A touch panel of Comparative Example 3 was produced in the same manner as Comparative Example 1 except that the support S1 was peeled off.

(Comparative Example 4)
<Preparation of optical anisotropic hard coat transfer film evaluation sample>
After further bonding the adhesive layer D1 of the optically anisotropic hard coat transfer film of Comparative Example 1 to the support S1 peeling surface during the production of the sample for evaluation of the optically anisotropic hard coat transfer film of Comparative Example 2 A sample for evaluating a hard coat transfer film of Comparative Example 4 was produced in the same manner as in Comparative Example 2, except that the support S1 was peeled off. The comparative example 4 is an aspect which has the adhesion layer D1 between the hard-coat layer H1 and the optically anisotropic layer H1.

<Production of touch panel>
After further bonding the adhesive layer D1 of the optically anisotropic hard coat transfer film of Comparative Example 1 to the support S1 peeling surface during the production of the sample for evaluation of the optically anisotropic hard coat transfer film of Comparative Example 2 A touch panel of Comparative Example 4 was produced in the same manner as Comparative Example 2 except that the support S1 was peeled off.

(Comparative Example 5)
<Production of touch panel>
A touch panel of Comparative Example 5 was produced in the same manner as in Example 1 except that the touch sensor film T6 was used instead of the touch sensor film T1.

<Production of display device>
The implementation which has a pseudo touch panel by arranging the touch panels of Examples 1 to 23 and Comparative Examples 1 to 5 on the upper polarizing plate of the IPS liquid crystal television 42LS5600 (manufactured by LG Electronics Co., Ltd.). The display device of Example 1 was produced. The angle between the slow axis of the touch panel and the absorption axis of the polarizing plate on the observer side of the liquid crystal monitor was set to 45 °.

<Evaluation>
The measurement of Re, the measurement of the thickness, the evaluation of the hardness, and the evaluation of the crack of the optical anisotropic layer of the samples for evaluating the optically anisotropic hard coat transfer films of Examples 1 to 19 and Comparative Examples 1 to 4 are as follows. evaluated. Further, the rainbow unevenness, blackout, unevenness, and blur of the display devices of Examples 1 to 23 and Comparative Examples 1 to 5 were evaluated as follows.

<< Measurement of Re >>
Using retardation measuring apparatus KOBRA-WR (manufactured by Oji Scientific Instruments), in-plane retardation Re at a wavelength of 550 nm of the optically anisotropic hard coat transfer film evaluation samples of Examples 1 to 19 and Comparative Examples 1 to 4 It was measured.

<< Evaluation of thickness >>
A thickness d obtained by subtracting the thickness of 550 μm of the glass substrate G1 from the thickness of the sample for evaluating an optically anisotropic hard coat transfer film of Examples 1 to 19 and Comparative Examples 1 to 4 was measured, and further evaluated according to the following criteria. did. That is, the thickness d means the thickness excluding the temporary support of the optically anisotropic hard coat transfer film. In order to meet the need for thinning, the thickness d is preferably less than 40 μm.
A: Thickness d is less than 40 μm B: Thickness d is 40 μm or more

<< Evaluation of hardness >>
Based on JIS K5600-5-4, for evaluation of optically anisotropic hard coat transfer films of Examples 1 to 19 and Comparative Examples 1 to 4 using a reciprocating abrasion tester, Tribogear TYPE: 30S (manufactured by Shinto Kagaku Co.). The pencil hardness of the sample surface was measured and further evaluated according to the following criteria. The pencil hardness required for the touch panel application is preferably “H” or more, and more preferably “2H” or more.
A: Pencil hardness is 2H or more B: Pencil hardness is H
C: Pencil hardness is less than H

<< Evaluation of cracks in optically anisotropic layer >>
After evaluating the hardness of the samples for optically anisotropic hard coat transfer film evaluation of Examples 1 to 19 and Comparative Examples 1 to 4, the cracks of the optical anisotropic layer were observed visually or microscopically, and the following criteria were used. It was evaluated with.
A: No cracks in the optical anisotropic layer can be confirmed.
B: Cracks in the optically anisotropic layer cannot be visually confirmed, but can be confirmed by microscopic observation.
C: The crack of an optical anisotropic layer can be confirmed.

<< Evaluation of rainbow unevenness >>
On the display devices of Examples 1 to 23 and Comparative Examples 1 to 5, a linear polarizing plate HLC2-5618 (manufactured by Sanritz) (upper polarizing plate) simulating polarized sunglasses was installed, and the rainbow unevenness was evaluated by visual observation. went. Here, the linear polarizing plate was arranged so that the transmission axis of the linear polarizing plate was 45 ° with the transmission axis of the upper polarizing plate in the display device.
As shown in FIG. 11, the specific method for observing rainbow unevenness is to observe the angle between the touch panel plane and the observer's line of sight as the polar angle θ1 and the line orthogonal to the absorption axis of the upper polarizing plate of the liquid crystal display. The observer observed the rainbow unevenness at a position of (θ1, θ2) = (40 °, 0 °) with respect to the azimuth angle θ2 with respect to the azimuth angle θ2, and evaluated based on the following criteria.
A: Neither rainbow unevenness nor image unevenness can be confirmed.
B: Rainbow unevenness cannot be confirmed, but image unevenness can be confirmed.
C: A thin rainbow unevenness can be confirmed.
D: Strong rainbow unevenness can be confirmed.

<< Blackout Evaluation >>
On the display devices of Examples 1 to 23 and Comparative Examples 1 to 5, a linear polarizing plate HLC2-5618 (manufactured by Sanritz) (upper polarizing plate) simulating polarized sunglasses was installed, and BO was evaluated by visual observation. It was. A specific method for observing BO is the above-described linear polarization while fixing the observer's viewpoint at a position of (θ1, θ2) = (40 °, 0 °) with respect to the polar angle θ1 and the azimuth angle θ2 in FIG. The contrast change when the azimuth angle of the plate HLC2-5618 was rotated 360 ° was observed according to the following criteria.
A: The image is always visible and there is almost no change in contrast.
B: Although the image can always be seen, the contrast change is large.
C: The image becomes dark at an angle, but no blackout occurs.
D: At a certain angle, the image becomes black and cannot be seen and is blacked out.

<< Bokeh evaluation >>
The display devices of Examples 1 to 23 and Comparative Examples 1 to 5 were visually observed, and image blur was observed according to the following criteria.
A: There is almost no image blur and there is no problem as a display device.
B: Although there is a little image blur, there is no problem as a display device.
C: Image blur is large and there is a problem level as a display device.

From the above table, it can be seen that the optically anisotropic hard coat transfer film of the present invention is excellent in scratch resistance because of its high hardness, and the optically anisotropic layer is hardly cracked. In addition, the number of times of bonding of the optically anisotropic hard coat transfer film of the present invention is one less than that of Comparative Examples 3 and 4, and it is possible to meet the need to reduce the thickness of the touch panel display. . Furthermore, Comparative Examples 3 and 4 also have a problem that the optical anisotropic layer is easily cracked. On the other hand, since Comparative Example 1 does not have a hard coat layer, it can be seen that the hardness is significantly inferior to that of the example.
In addition, it can be seen that the display device manufactured using the optically anisotropic hard coat transfer film of the present invention has improved rainbow unevenness, blackout, unevenness and blur. On the other hand, since the comparative example 2 does not have an optically anisotropic layer, it turns out that blackout is remarkably inferior to an Example. In Comparative Example 5, since Re40 of the touch sensor film T5 is 1150 nm and Re40 is outside the range of 0 to 1000 nm, it can be seen that the rainbow unevenness is significantly inferior to the example.

DESCRIPTION OF SYMBOLS 1 Touch panel 2 Image display panel 3,300, Touch sensor 4 Image display cell 5 Polarizing plate 6 Organic EL cell 7 1/4 wavelength plate 8 Circular deflecting plate 9 Organic EL panel 12 Support body 14 1st detection electrode 16 1st lead-out wiring 18 Second detection electrode 20 Second lead wiring 30 Conductive thin wire 32 Lattice 42 Second adhesive layer 50 Protective substrate 200 Optical anisotropic hard coat transfer film 210 Laminate 100 Temporary support 101 Hard coat layer 102 Optical anisotropic layer 103 Alignment layer 104 First adhesive layer

Claims (17)

An optically anisotropic hard coat transfer film having at least one hard coat layer and at least one optical anisotropic layer on one surface of a temporary support. The optically anisotropic hard coat transfer film according to claim 1, wherein retardation Re in the in-plane direction at a wavelength of 550 nm of the optically anisotropic layer is 40 to 240 nm.
However, when the refractive index in the in-plane slow axis direction of the optical anisotropic layer is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the in-plane direction Retardation of Re = (nx−ny) × d. The optically anisotropic hard coat transfer film according to claim 1 or 2, wherein the temporary support, the hard coat layer, and the optical anisotropic layer are laminated in this order. The optically anisotropic hard coat transfer film according to claim 1, wherein the temporary support and the hard coat layer are laminated adjacent to each other. 5. The apparatus according to claim 1, further comprising at least one alignment layer between the temporary support and the optical anisotropic layer, wherein the alignment layer and the optical anisotropic layer are laminated adjacent to each other. 2. An optically anisotropic hard coat transfer film according to item 1. The optically anisotropic hard coat transfer film according to claim 5, wherein the temporary support, the hard coat layer, the alignment layer, and the optical anisotropic layer are laminated adjacent to each other in this order. The optically anisotropic hard-coat transfer film of any one of Claims 1-6 which has an adhesion layer in the outermost surface on the opposite side to the said temporary support body side. The optically anisotropic hard coat transfer film according to any one of claims 1 to 7, comprising a step of applying a hard coat layer coating solution and an optical anisotropic layer coating solution onto a temporary support. Manufacturing method. A touch panel having at least one hard coat layer, at least one optically anisotropic layer, an adhesive layer, and a touch sensor, and a retardation Re40 in a 40-degree direction at a wavelength of 550 nm of the touch sensor is 0 to 1000 nm;
However, the retardation Re40 represents the average value of the retardation Re when the touch sensor is tilted by ± 40 degrees with respect to the normal direction in the plane with the slow axis in the plane as the rotation axis, and the optical anisotropic layer If the refractive index in the in-plane slow axis direction is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the retardation in the in-plane direction Re = (nx−ny ) × d. The touch panel according to claim 9, wherein retardation Re in the in-plane direction at a wavelength of 550 nm of the optical anisotropic layer is 40 to 240 nm.
However, when the refractive index in the in-plane slow axis direction of the optical anisotropic layer is nx, the refractive index in the in-plane fast axis direction is ny, the refractive index in the thickness direction is nz, and the film thickness is d, the in-plane direction Retardation of Re = (nx−ny) × d. The touch panel according to claim 9 or 10, wherein the touch sensor, the optically anisotropic layer, and the hard coat layer are laminated in this order. The touch panel according to claim 9, wherein the hard coat layer is an outermost surface layer. The optical anisotropic layer has at least one alignment layer on a side opposite to the touch sensor side, and the alignment layer and the optical anisotropic layer are laminated adjacent to each other. The touch panel according to item 1. The touch panel according to claim 13, wherein the touch sensor, the adhesive layer, the optically anisotropic layer, the alignment layer, and the hard coat layer are laminated adjacent to each other in this order. The touch panel according to any one of claims 9 to 14, which is produced by transferring the optically anisotropic hard coat transfer film according to any one of claims 1 to 7 onto the touch panel. A step of forming an adhesive layer on the outermost surface opposite to the temporary support side of the optically anisotropic hard coat transfer film according to any one of claims 1 to 6, and the hard coat transfer via the adhesive layer. A method for manufacturing a touch panel, comprising: a step of transferring a film to a touch sensor; and a step of peeling a temporary support. A method for manufacturing a touch panel, comprising: a step of transferring the optically anisotropic hard coat transfer film according to claim 7 to a touch sensor; and a step of peeling the temporary support.

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