JP2019159073A - Conductive material laminate body - Google Patents

Abstract

To provide a conductive material laminate body which is desirably used for a touch panel integrated with a liquid crystal display and can exhibit an excellent visibility of a pattern.SOLUTION: The present invention includes: a light transmitting conductive layer (A) with a mesh-state metal fine line pattern; a light transmitting supporting body (B); an iodine-based body (C); a light transmitting supporting body (D); and a light transmitting conductive layer (E) with a mesh-state metal fine line pattern in this order from a recognition side. The mesh-state fine line pattern of the light transmitting conductive layer (A) is made of a metal fine line having a dark color layer at the recognition side while the mesh-state fine line pattern of the light transmitting conductive layer (E) is made of a metal fine line not having the dark color layer at the recognition side.SELECTED DRAWING: Figure 1

Description

  The present invention is suitably used for a touch panel integrated with a liquid crystal display, and relates to a conductive material laminate having good pattern visibility.

  In electronic devices such as smartphones, personal digital assistants (PDAs), notebook PCs, tablet PCs, OA devices, medical devices, and car navigation systems, touch panel sensors are widely used as input means for these displays. In addition, liquid crystal displays are widely used as these displays.

  A liquid crystal display usually has a structure in which a liquid crystal sandwiched between alignment layers and a color filter are sandwiched between two glass substrates on a backlight, and are further sandwiched between two polarizing plates so that the polarization angle is 90 ° to each other. Have With this structure, an image can be projected on the display by changing the polarization direction by applying a voltage to the liquid crystal, thereby passing or blocking light illuminated from the backlight. The polarizing plate generally has a configuration in which a polarizing layer is sandwiched between two light transmissive supports. Polarizing layers are roughly classified into iodine-based polarizing layers having excellent optical properties and dye-based polarizing layers having excellent high-temperature durability, and iodine-based polarizing layers are suitably used for liquid crystal displays because of their excellent optical properties.

  On the other hand, the touch panel sensor includes an optical method, an ultrasonic method, a resistance film method, a surface capacitance method, a projection capacitance method, etc. depending on the position detection method. A projected electrostatic capacity method is suitably used. The resistive film type touch panel sensor has a structure in which two conductive materials having a light transmissive conductive layer are used on a light transmissive support, and these conductive materials are arranged to face each other via a dot spacer. By applying a force to one point of the sensor, the light-transmitting conductive layers come into contact with each other, and the voltage applied to each light-transmitting conductive layer is measured through the other light-transmitting conductive layer. The position is detected. On the other hand, a projected capacitive touch panel sensor has one conductive material having two light-transmitting conductive layers on a light-transmitting support, or one layer of light-transmitting property on a light-transmitting support. Two conductive materials having a conductive layer are used to detect a change in electrostatic capacitance between light-transmitting conductive layers when a finger or the like is brought close, and detect a position where the finger is brought close. The latter has excellent durability because it has no moving parts, and can detect multiple points at the same time. Therefore, the latter is widely used particularly in smartphones and tablet PCs.

  In a projected capacitive touch panel sensor, a sensor unit having a plurality of sensors obtained by patterning a light-transmitting conductive layer on a light-transmitting support can be used for simultaneous detection of multiple points. The moving point can be detected. In order to extract the change in capacitance detected by the sensor unit to the outside as an electric signal, between all the sensors of the conductive material and a terminal unit composed of a plurality of terminals provided to extract the electric signal to the outside. Is provided with a peripheral wiring portion comprising a plurality of peripheral wirings for electrically connecting them. Usually, the light transmissive conductive layer described above is located on the display, and the peripheral wiring portion and the terminal portion are located outside the display, that is, in a so-called frame portion. In the prior art, the light transmissive conductive layer is formed of a conductive film made of a conductive metal oxide such as ITO (indium-tin oxide), IZO (indium-zinc oxide), ZnO (zinc oxide) or the like. In general, the peripheral wiring portion and the terminal portion are made of metal such as gold, silver, copper, nickel, and aluminum. For example, in Japanese Patent Application Laid-Open No. 2015-32183 (Patent Document 1), a transparent conductor such as ITO or IZO is used as a material for a light-transmitting conductive layer, and a metal such as copper is used as a material for an extraction wiring (peripheral wiring portion). A touch panel sensor member using the above is disclosed.

  At present, the ITO conductive film is mainly used as the light transmissive conductive layer. However, the ITO conductive film has a large refractive index and a large surface reflection of light, so that the problem of a decrease in the total light transmittance and an increase in the size of the touch panel sensor result in a lack of conductivity and a decrease in the detection sensitivity of the touch panel sensor. There was a problem.

  Therefore, in recent years, a light-transmitting conductive layer containing metal nanowires or a light-transmitting conductive layer having a mesh-like metal wire pattern has been proposed as a light-transmitting conductive layer having excellent conductivity. For example, JP 2010-84173 A (Patent Document 2) discloses a transparent conductor having a light transmissive conductive layer containing metal nanowires, and JP 2015-133239 A (Patent Document 3). In addition, an electrode pattern sheet having a light-transmitting conductive layer formed by a mesh-like fine metal wire pattern composed of fine metal wires mainly composed of silver is disclosed. The publication discloses a method of forming the network metal fine line pattern by printing an ink containing silver fine particles, a method of performing electroless plating after printing a resin paint containing an electroless plating catalyst, It is described that it can be formed by various methods such as a subtractive method in which a photoresist layer is provided and a resist pattern is formed, and then the metal layer is removed by etching, and a method using a silver salt photosensitive material.

  By the way, conventionally, in order to integrate the liquid crystal display and the touch panel sensor, a method of manufacturing the liquid crystal display and the touch panel sensor as separate members and bonding them together has been common. For this reason, the integrated touch panel sensor becomes thick and hinders downsizing of the electronic device, and there is a problem that brightness and clarity of the display are impaired. Therefore, when the liquid crystal display and the touch panel sensor are integrated, the light-transmitting conductive layer on the surface opposite to the iodine-based polarizing layer of each of the two light-transmitting supports sandwiching the iodine-based polarizing layer of the polarizing plate. By forming a conductive material laminate in which two layers are formed in total, and using the two polarizing plates in the liquid crystal display instead of the viewing-side polarizing plate, the number of light-transmitting supports is reduced. Attempts have been made.

  For example, JP 2012-8255 A (Patent Document 4) discloses a surface of a cellulose layer having a cellulose layer (light transmissive support) on both sides of an iodine polarizing layer and not in contact with the iodine polarizing layer. A polarizing plate (conductive material laminate) having a light-transmitting conductive layer containing metal nanowires thereon is disclosed. However, a conductive material laminate having a light-transmitting conductive layer containing metal nanowires on the surface of each of the two light-transmitting supports sandwiching the iodine-based polarizing layer on the side not in contact with the iodine-based polarizing layer, When used in a liquid crystal display integrated touch panel sensor, the metallic nanowires with metallic luster are irregularly arranged in the light-transmitting conductive layer, so external light is diffusely reflected and appears whitish, and the contrast of the liquid crystal display There was a problem that decreased.

  For example, in Japanese Patent Application Laid-Open No. 2015-114612 (Patent Document 5), there is an iodine-based polarizing layer on one surface of the light transmissive support, and the other of the light transmissive support. A polarizing plate having a light-transmitting conductive layer having a network-like fine metal wire pattern on the surface is disclosed. In the polarizing plate, unlike the light-transmitting conductive layer containing the metal nanowire described above, there is no problem that the contrast of the liquid crystal display is lowered.

  However, each of the two light-transmitting supports sandwiching the iodine-based polarizing layer has a conductive material laminate having a light-transmitting conductive layer having a network metal fine line pattern on the surface opposite to the iodine-based polarizing layer. When used for a liquid crystal display integrated touch panel sensor, there has been a problem that a mesh-like fine metal wire pattern is easily recognized, and a solution has been demanded.

  As a method for improving the visibility of the mesh-like metallic silver fine line pattern (difficult visibility of the pattern, hereinafter simply referred to as visibility) in the touch panel module, for example, JP-A-2015-184958 (Patent Document 6). In order from the viewing side, a protective layer, a polarizing plate, a λ / 4 plate, a mesh conductive layer composed of a mesh-like metal electrode, a conductive film formed on a support, a λ / 4 plate, are arranged in this order. Is disclosed. This uses a polarizing plate and a λ / 4 plate separately from the conductive film in order to prevent the mesh-like metal electrode from being visually recognized.

  On the other hand, as a method for improving the visibility of the reticulated metallic silver fine wire pattern, it is known to provide a dark color layer on the surface of the fine metal wire. For example, JP 2013-206315 A (Patent Document 7) discloses a film-like touch panel that has striped copper wiring on the front and back surfaces of a film and has a black copper oxide film on the side where the copper wiring on the front and back sides is viewed. A sensor is disclosed. However, sufficient visibility could not be obtained in the laminate in which the mesh metal fine wire pattern is arranged on both surfaces of the iodine-based polarizing layer.

JP-A-2015-32183 JP 2010-84173 A Japanese Patent Laying-Open No. 2015-133239 JP 2012-8255 A JP2015-114612A JP2015-184958A JP 2013-206315 A

  An object of the present invention is to provide a conductive material laminate that is suitably used for a touch panel integrated with a liquid crystal display and has good pattern visibility.

  The above-mentioned problems of the present invention are as follows. From the viewing side, a light-transmitting conductive layer (A) having a mesh-like metal fine wire pattern, a light-transmitting support (B), an iodine-based polarizing layer (C), a light-transmitting support ( D) a light-transmitting conductive layer (E) having a mesh-like fine metal wire pattern, at least in this order, and visual recognition of the metal wires constituting the mesh-like metal fine-wire pattern of the light-transmitting conductive layer (A) Achieved by a conductive material laminate having a dark color layer on the side surface and no dark color layer on the side surface of the metal fine wire constituting the mesh-like metal fine wire pattern of the light-transmissive conductive layer (E) Is done.

  According to the present invention, it is possible to provide a conductive material laminate that is suitably used for a touch panel integrated with a liquid crystal display and has good pattern visibility.

Schematic sectional view showing an example of the conductive material laminate of the present invention Schematic diagram of transparent original 1 used in the embodiment Schematic diagram of transparent original 2 used in the embodiment

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of the conductive material laminate of the present invention. A conductive material laminate 10 illustrated in FIG. 1 includes a light-transmitting conductive layer (A) having a mesh-like metal fine line pattern 21 composed of fine metal wires 22 having a dark color layer 23 on a visible side surface from the visual recognition side, light A light-transmitting conductive layer (E) having a mesh-like metal wire pattern 31 composed of a light-transmitting support (B), an iodine-based polarizing layer (C), a light-transmitting support (D), and metal wires 32 Have at least this order.

  In the present invention, the iodine side polarizing layer (C) is used for viewing the side surface (the surface on the side of the light transmissive support (D)) of the metal fine wire 32 constituting the mesh metal fine wire pattern 31 of the light transmissive conductive layer (E). ) Is suppressed. Therefore, since the light reflectance is suppressed by having the dark color layer 23 on the viewing side surface of the fine metal wire 22 constituting the fine metal wire pattern 21 included in the light transmissive conductive layer (A), the fine mesh metal wire pattern 21 is suppressed. And the balance of the light reflectance of the mesh-like metal fine wire pattern 31 is improved, and a conductive material laminate having good visibility can be obtained. On the other hand, when a dark color layer is provided on the viewing side surface (surface on the light-transmitting support (D) side) of the fine metal wires 32 constituting the mesh-like fine metal wire pattern 31 of the light-transmitting conductive layer (E), It overlaps with the action of the polarizing layer (C), the balance of the light reflectivity of the mesh-like metal fine line pattern 21 and the mesh-like metal fine line pattern 31 is lost, and on the contrary, the mesh-like metal which the light-transmitting conductive layer (A) has. The visibility of the fine line pattern 21 is deteriorated. Therefore, in the present invention, a dark color layer is provided on the viewing side surface (the surface on the side of the light transmissive support (D)) of the metal fine wire 32 constituting the mesh-like fine metal wire pattern 31 of the light transmissive conductive layer (E). No.

  Note that FIG. 1 is a schematic diagram, and the relationship between the thickness and width of each layer in the diagram need not be as illustrated. Although not shown in FIG. 1, in the conductive material laminate 10, the surface opposite to the viewing side of the thin metal wire 22 (the surface on the light-transmitting support (B) side) or the side surface of the thin metal wire 22. The surface opposite to the viewing side of the fine metal wire 32, the side surface of the fine metal wire 32, and the like may have a dark color layer.

  Hereinafter, each element which comprises the electrically-conductive material laminated body of this invention is explained in full detail. As the light transmissive support (B) and the light transmissive support (D) included in the conductive material laminate 10 of the present invention, resins, glass, ceramics, and the like are preferably used. Especially, the film which consists of resin excellent in a flexibility and transparency is used suitably at the point which is easy to handle. Specific examples of the resin include polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), triacetate resins such as acrylic resin, epoxy resin, fluororesin, silicone resin, polycarbonate resin, diacetate resin, and triacetyl cellulose. And polyarylate resin, polyvinyl chloride, polysulfone resin, polyether sulfone resin, polyimide resin, polyamide resin, polyolefin resin, cyclic polyolefin resin, and polyvinyl acetal resin. The total light transmittance of the light transmissive support (B) and the light transmissive support (D) is preferably 60% or more, and more preferably 70% or more. The haze of the light transmissive support (B) and the light transmissive support (D) is preferably 0 to 3%, and more preferably 0 to 2%.

  The thickness of the light transmissive support (B) and the light transmissive support (D) is preferably 25 to 300 μm because the touch panel sensor can be thinned. The light-transmitting support (B) and the light-transmitting support (D) are known as ultraviolet absorbers, antioxidants, lubricants, plasticizers, mold release agents, anti-coloring agents, flame retardants, antistatic agents, and the like. The additive may be contained. Although not shown in FIG. 1, the light-transmitting support (B) and the light-transmitting support (D) include an easy-adhesion layer, a hard coat layer, an antireflection layer, an antiglare layer, and an adhesive layer. , And may have a known layer such as an antistatic layer, and the light-transmitting support (B) and the light-transmitting support (D) are corona treatment, plasma treatment, primer treatment, saponification treatment, etc. The known surface modification treatment may be performed. The light transmissive support (B) and the light transmissive support (D) may be the same or different.

  The metal species contained in the fine metal wire 22 and the fine metal wire 32 are not limited, and examples thereof include known metals such as gold, silver, copper, aluminum, nickel, and alloys made of known metals, but silver from the viewpoint of conductivity. Or it is preferable to contain copper, and it is especially preferable to contain silver. The ratio of the metal contained in the fine metal wire is preferably 50% by mass or more, more preferably 70% by mass or more, and particularly preferably 80% by mass or more with respect to the total solid mass of the metal fine wire. The fine metal wire 22 and the fine metal wire 32 may contain metal species having the same composition, or may contain metal species having different compositions.

  The thickness of the fine metal wire 22 and the fine metal wire 32 is not particularly limited. However, if the thickness is too thick, the fine metal wire is easily visible. If the thickness is too thin, the conductive properties of the light transmissive conductive layer (A) and the light transmissive conductive layer (E). Sexuality may be insufficient. Therefore, the thickness of the fine metal wire 22 and the fine metal wire 32 is preferably 0.05 to 5 μm, more preferably 0.07 to 3 μm, and particularly preferably 0.1 to 1 μm. The thicknesses of the fine metal wires 22 and the fine metal wires 32 may be the same or different.

  When the conductive material laminate 10 of the present invention is used for a touch panel sensor, the mesh-like metal fine line pattern 21 included in the light transmissive conductive layer (A) and the mesh-like metal fine line pattern 31 included in the light transmissive conductive layer (E). It is preferable to have a geometric shape in which a plurality of unit cells are arranged in a mesh shape because the sensitivity and visibility of the sensor are excellent. Examples of unit cell shapes include triangles such as regular triangles, isosceles triangles, right triangles, squares, rectangles, rhombuses, parallelograms, trapezoids, etc., hexagons, octagons, dodecagons, decagons, etc. The shape which combined n square, star shape, etc. of these is mentioned, The repetition of these shapes independently, or the combination of two or more types of multiple shapes is mentioned. Among them, the shape of the unit cell is preferably a square or a rhombus. Irregular geometric shapes represented by Voronoi graphics, Delaunay graphics, Penrose tile graphics, etc. are also one of the preferred shapes of the mesh-like metal fine line pattern 21 and the mesh-like metal fine line pattern 31.

  When the conductive material laminate 10 of the present invention is used for a touch panel sensor, the light-transmitting conductive layer (A) and the light-transmitting conductive layer (E) are a mesh-like metal wire pattern 21 and a mesh-like metal wire pattern, respectively. It is preferable to have a sensor part having a plurality of sensors formed by 31. For the purpose of improving the visibility of the sensor, between the individual sensors, the sensor is electrically insulated from the sensor, and a mesh-like metal fine line pattern It is also possible to have a dummy sensor portion having a plurality of dummy sensors formed by the above. The line widths of the plurality of sensors and the fine metal wires 22 and the fine metal wires 32 constituting the dummy sensor are preferably 20 μm or less from the viewpoint of excellent visibility, and more preferably 1 to 10 μm. Moreover, it is preferable that the repeating interval of the unit cell is 50 to 600 μm because it is excellent in the sensitivity and visibility of the sensor, and more preferably 50 to 400 μm. The light-transmitting conductive layer (A) and the light-transmitting conductive layer (E), which have excellent light transmittance, have an aperture ratio of 85% or more for the mesh-like metal fine wire pattern 21 and the mesh-like metal fine wire pattern 31. Since it is obtained, it is preferable and 88 to 99% is more preferable. The line widths of the fine metal wire 22 and the fine metal wire 32 may be the same or different.

  There are no particular limitations on the method of forming the light-transmitting support (B) and the mesh-like metal fine line pattern 21 and the mesh-like metal fine-line pattern 31 on the light-transmitting support (D). For example, JP-A-2015-69877. In accordance with the method disclosed in the publication, a conductive metal ink or conductive paste containing a metal and a binder is applied on a light-transmitting support by a method such as printing to form a reticulated metal fine wire pattern, According to the method disclosed in JP-A-2007-59270, a silver salt light-sensitive material having a silver halide emulsion layer on a light-transmitting support is used, and a reticulated metal fine wire pattern is formed using a curing development method. Silver salt sensitization having a silver halide emulsion layer on a light-transmitting support according to the method disclosed in JP-A-2004-221564, JP-A-2007-12314, etc. A method of forming a reticulated metal fine wire pattern using a material and a direct development method, Japanese Patent Application Laid-Open No. 2003-77350, Japanese Patent Application Laid-Open No. 2005-250169, Japanese Patent Application Laid-Open No. 2007-188655, and Japanese Patent Application Laid-Open No. 2004-207001. In accordance with the method disclosed in Japanese Laid-Open Patent Publication No. 2001-260, etc., a silver salt photosensitive material having at least a physical development nucleus layer and a silver halide emulsion layer in this order on a light transmissive support is used, and a soluble silver salt forming agent and a reducing agent are added in an alkaline solution. In accordance with a method of forming a mesh-like metal fine line pattern using a so-called silver salt diffusion transfer method, which is applied in the method, a method disclosed in JP-A-2014-197531, an underlayer on a light-transmitting support, photosensitive Using a photosensitive resist material laminated with a resist layer, the photosensitive resist layer is exposed to an arbitrary pattern and then developed to form a resist image. A method for performing metallization to localize a metal on a base layer not covered with a resist image and then removing the resist image to form a mesh-like metal fine line pattern, disclosed in JP-A-2015-82178 According to the method, a metal film and a resist film are provided on a light-transmitting support, and the resist film is exposed and developed to form an opening, and the metal film in the opening is etched and removed to form a mesh-like metal Examples thereof include a method for forming a fine line pattern.

  Among the methods for forming a reticulated metal fine wire pattern on the above light-transmitting support, a reticulated metal fine wire pattern composed of fine metal wires containing silver having excellent conductivity can be easily formed. A method of forming a reticulated metal fine wire pattern using a material is preferable, and a method of forming a reticulated metal fine wire pattern using a silver salt diffusion transfer method is particularly preferable because the pattern can be easily miniaturized.

  In the present invention, the metal fine wire 22 and the metal fine wire 32 may be subjected to a known metal surface treatment. For example, a reducing substance, a water-soluble phosphorus oxo acid compound, or a water-soluble halogen compound as described in Japanese Patent Application Laid-Open No. 2008-34366 may be allowed to act, as described in Japanese Patent Application Laid-Open No. 2013-19679. A triazine having two or more mercapto groups in the molecule or a derivative thereof may be allowed to act. Further, when forming a reticulated metal fine wire pattern using a silver salt photosensitive material, the metal fine wire 22 and the metal fine wire 32 contain an enzyme such as a proteolytic enzyme as described in JP-A-2007-12404. The remaining gelatin or the like may be reduced by treatment with a treating solution.

  The dark color layer 23 provided on the viewing side surface of the thin metal wire 22 of the conductive material laminate 10 of the present invention will be described. In the present invention, the dark color layer means a layer in which the metallic luster on the surface of the fine metal wire is lowered and the light absorption is increased. By the dark color layer 23, the light reflectance of the visual recognition side surface of the metal fine wire 22 can be suppressed, and a conductive material laminate excellent in visibility can be obtained.

  Examples of the method for forming the dark color layer 23 include a lamination method and a replacement method. As a lamination method, a known black plating method such as black nickel plating, black chrome plating, black tin-nickel alloy plating, etc., a metal material such as nickel copper, nickel copper titanium, nickel copper molybdenum is used as a target material, oxygen Examples thereof include a method of sputtering under supply of a reactive gas such as nitrogen and a method of printing black ink. Examples of the replacement method include a method of sulfiding or oxidizing the surface of the fine metal wire 22 and a method of replacing the surface of the fine metal wire 22 with a noble metal. Examples of the method for sulfiding the surface of the fine metal wire 22 include an aqueous solution of potassium sulfide, barium sulfide and ammonium sulfide, and a method of applying a mixed aqueous solution of sulfur and sodium sulfide to the surface of the fine metal wire 22. As a method for oxidizing the surface of the fine metal wire 22, a mixed aqueous solution of hypochlorite and sodium hydroxide, a mixed aqueous solution of chlorite and sodium hydroxide, a mixed aqueous solution of peroxodisulfuric acid and sodium hydroxide, or the like is used. 22 A method of applying to the surface can be exemplified. Examples of the method for replacing the surface of the fine metal wire 22 with a noble metal include a method of applying an aqueous solution containing palladium chloride, palladium sulfate, or palladium nitrate to the surface of the fine metal wire 22. Among the above, the replacement method is preferable because the formation of the dark color layer 23 is easy.

  The conductive material laminate 10 of the present invention is not limited to the light-transmitting support (B) and the mesh-like metal fine wire pattern 21 and the mesh-like metal fine-wire pattern 31 described above on the light-transmitting support (D). You may have a pattern (filling pattern). For example, when the conductive material laminate 10 of the present invention is used for a touch panel sensor, a terminal unit including a plurality of terminals provided for taking out a change in capacitance detected by the sensor unit as an electrical signal, and a sensor unit It is preferable to provide a peripheral wiring portion composed of a plurality of peripheral wirings that electrically connect the terminal portion and the terminal portion by a solid pattern (filled pattern). The line width of the terminal constituting the terminal portion and the peripheral wiring constituting the peripheral wiring portion is not particularly limited, but is preferably 10 to 1000 μm, more preferably 15 to 750 μm, particularly because of excellent conductivity. Preferably it is 20-500 micrometers. As a method for forming the terminals constituting the terminal portion and the peripheral wiring constituting the peripheral wiring portion, a method of forming the above-described mesh-like metal fine wire pattern 21 and mesh-like metal fine wire pattern 31 can be exemplified. When the solid pattern is not on the display but in the frame portion, the dark color layer is not particularly necessary, but when it is on the display, it is desirable to have the dark color layer. As the formation method, the same method as the formation method of the dark color layer 23 mentioned above can be illustrated.

  The iodine-type polarizing layer (C) included in the conductive material laminate 10 of the present invention will be described. As an iodine type polarizing layer, the iodine type polarizing layer conventionally known for a polarizing plate use can be used. Although the manufacturing method of an iodine type polarizing layer is explained in full detail below, this invention is not limited to this.

  The iodine-based polarizing layer can be obtained by subjecting a polyvinyl alcohol film to a dyeing process, a crosslinking process, and a stretching process. Further, swelling treatment, washing treatment, water washing treatment, and drying treatment may be performed. The above processing can be performed simultaneously or sequentially in any order.

  The polyvinyl alcohol film used in the present invention means a film containing a polyvinyl alcohol resin as a resin constituting the film. The ratio of the polyvinyl alcohol-based resin is preferably 80% by mass or more, more preferably 90% by mass or more, and particularly preferably 100% by mass with respect to the total mass of the resin constituting the film. Examples of the polyvinyl alcohol resin include resins obtained by saponifying vinyl acetate polymers and resins obtained by saponifying copolymers of unsaturated carboxylic acids, unsaturated sulfonic acids, olefins, vinyl ethers and the like with vinyl acetate. It can be illustrated. The polyvinyl alcohol-based resin may have an acetoacetyl group, a sulfonic acid group, a carboxyl group, an oxyalkylene group, and the like.

  A commercially available product may be used as the polyvinyl alcohol film. As a commercial item, VF-PS series, VF-PE series, etc. which are marketed from Kuraray Co., Ltd. can be illustrated, and these can be used preferably.

  The dyeing process is a process of adsorbing and orienting iodine on the polyvinyl alcohol film. It is simple and preferable to perform the dyeing treatment by immersing the polyvinyl alcohol film in a dyeing treatment solution. As the dyeing treatment liquid, an aqueous solution containing iodine and iodide which is a dissolution aid is used. In addition to this, the dyeing treatment liquid may contain an additive such as a surfactant and an antifoaming agent, and an organic solvent such as alcohol. Examples of the iodide include potassium iodide, lithium iodide, sodium iodide, calcium iodide, tin iodide, and titanium iodide. Of these, potassium iodide is preferably used. Moreover, when using an iodide by each process of the manufacturing method of the iodine type polarizing layer mentioned later, potassium iodide is preferable like the above.

  The iodine concentration in the dyeing solution is preferably 0.01 to 10% by mass, more preferably 0.02 to 5% by mass. The iodide concentration in the dyeing solution is preferably 0.1 to 10% by mass, and more preferably 0.2 to 8% by mass. In dyeing, the temperature of the dyeing solution is preferably 20 to 50 ° C, more preferably 25 to 40 ° C. The immersion time is preferably 10 to 300 seconds, more preferably 20 to 240 seconds.

  The crosslinking treatment is a treatment for crosslinking the polyvinyl alcohol film. The crosslinking treatment is preferably performed by immersing the polyvinyl alcohol film in a crosslinking treatment solution. As the crosslinking treatment liquid, an aqueous solution containing a boron compound or the like is used. The cross-linking treatment liquid may contain an additive such as a surfactant and an antifoaming agent, and an organic solvent such as alcohol. Examples of the boron compound include boric acid and borax, and it is particularly preferable to use boric acid. The boron compound concentration in the crosslinking treatment liquid is preferably 1 to 15% by mass from the viewpoint of obtaining an iodine-based polarizing layer having excellent heat resistance, and more preferably 2 to 12% by mass. The crosslinking treatment liquid can contain an iodide typified by potassium iodide. When the crosslinking treatment solution contains iodide, the iodide concentration is preferably 0.1 to 10% by mass, and more preferably 0.5 to 8% by mass.

  The temperature of the crosslinking treatment liquid is preferably 25 ° C. or more, more preferably 25 to 85 ° C., and particularly preferably 30 to 60 ° C. The immersion time in the crosslinking treatment liquid is preferably 10 to 800 seconds, more preferably 20 to 500 seconds.

  The stretching treatment is usually performed by uniaxial stretching. The stretching process may be performed simultaneously with the above-described dyeing process and crosslinking process, or may be performed in multiple stages. Examples of the stretching method include a dry stretching process and a wet stretching process. Examples of the dry stretching process include an inter-roll stretching process, a heated roll stretching process, and a compression stretching process. Examples of the wet stretching treatment include a method of stretching while being immersed in a stretching treatment solution. In the present invention, it is preferable to stretch using a wet stretching process.

  The stretching solution used in the wet stretching process contains boron compounds typified by boric acid, iodides typified by potassium iodide, additives such as surfactants and antifoaming agents, and organic solvents such as alcohol. You may go out. When the iodide is contained in the stretching solution, the iodide concentration is preferably 0.1 to 10% by mass, more preferably 0.2 to 7% by mass. As for the temperature of an extending | stretching process liquid, 25 degreeC or more is preferable, More preferably, it is 30-85 degreeC, Especially preferably, it is 50-70 degreeC. The immersion time is preferably 10 to 800 seconds, more preferably 30 to 500 seconds.

  The iodine treatment polarizing layer having excellent optical properties (polarization degree) is obtained by performing the stretching treatment so that the total stretch ratio is 2 to 15 times the initial length of the polyvinyl alcohol film before stretching. Is preferable. In the present invention, the total stretch ratio means a cumulative stretch ratio including stretching in other processes other than the stretching process.

  The polyvinyl alcohol film can be subjected to a swelling treatment before the dyeing treatment, the crosslinking treatment and the stretching treatment. By swelling treatment, dirt on the surface of the polyvinyl alcohol film and an anti-blocking agent can be washed, and there is an effect of suppressing uneven dyeing by swelling the polyvinyl alcohol film.

  It is convenient and preferable that the swelling treatment is performed by immersing the polyvinyl alcohol film in a swelling treatment solution. The swelling treatment liquid preferably contains 50% by mass or more of water. In addition to water, the swelling treatment liquid may contain an iodide such as potassium iodide, an additive such as a surfactant and an antifoaming agent, and an organic solvent such as alcohol. When iodide is contained in the swelling treatment liquid, the iodide concentration is preferably 0.1 to 10% by mass, more preferably 0.2 to 5% by mass.

  20-45 degreeC is preferable and, as for the temperature of the swelling process liquid in a swelling process, More preferably, it is 25-40 degreeC. The immersion time in the swelling treatment liquid is preferably 10 to 300 seconds, more preferably 20 to 240 seconds.

  The polyvinyl alcohol film can be subjected to a washing treatment with a washing solution containing iodide after the dyeing treatment, the crosslinking treatment and the stretching treatment. The iodide concentration in the cleaning liquid is preferably 0.5 to 10% by mass, more preferably 0.5 to 8% by mass, and particularly preferably 1 to 6% by mass.

  When performing the washing process with a washing solution containing iodide, the temperature of the washing solution is preferably 15 to 60 ° C, more preferably 25 to 40 ° C. The washing time is preferably 1 to 120 seconds, more preferably 3 to 90 seconds. The cleaning process with the cleaning liquid containing iodide may be performed after any process as long as it is before the drying process.

  Further, in addition to the cleaning process using a cleaning liquid containing iodide, a water cleaning process can be performed. It is convenient and preferable to perform the water washing treatment by immersing the polyvinyl alcohol film in ion exchange water, distilled water, pure water or the like. The water washing treatment temperature is preferably 5 to 50 ° C, more preferably 10 to 45 ° C, and particularly preferably 15 to 40 ° C. The water washing treatment time is preferably 5 to 300 seconds, more preferably 10 to 240 seconds.

  After performing each said process to a polyvinyl alcohol-type film, an iodine type polarizing layer is obtained by finally giving a drying process. The drying temperature is preferably 20 to 150 ° C, more preferably 30 to 100 ° C. The drying time is preferably 1 to 10 minutes.

  Although the thickness of an iodine type polarizing layer is not specifically limited, It is preferable that it is 5-75 micrometers, More preferably, it is 10-50 micrometers, Especially preferably, it is 15-40 micrometers.

  The conductive material laminate 10 is that the iodine-based polarizing layer (C) and the light-transmitting support (B), and the iodine-based polarizing layer (C) and the light-transmitting support (D) are bonded with an adhesive. It is preferable because of its excellent strength. Note that the adhesive is not shown in FIG. The adhesive is not particularly limited, and can be arbitrarily selected from known adhesives according to the purpose. However, it is preferable to use a water-soluble adhesive because of its excellent affinity with the iodine-based polarizing layer.

  Examples of the water-soluble adhesive include those containing a water-soluble natural polymer and / or a water-soluble synthetic polymer. Examples of the water-soluble natural polymer include protein and starch. Examples of the water-soluble synthetic polymer include resole resin, urea resin, melamine resin, polyethylene oxide, polyacrylamide, polyvinyl pyrrolidone, acrylic acid ester, methacrylic acid ester, and polyvinyl alcohol resin. Especially, since it is excellent in adhesiveness with an iodine type polarizing layer, the water-soluble adhesive containing a polyvinyl alcohol-type resin is preferable, and the polyvinyl alcohol-type resin which has an acetoacetyl group is especially preferable. As a polyvinyl alcohol-type resin which has an acetoacetyl group, the Gohsenx (trademark) Z series marketed by Nippon Synthetic Chemical Industry Co., Ltd. can be illustrated and can be used preferably.

  The conductive material laminate 10 of the present invention may have a pressure-sensitive adhesive layer on the light-transmitting conductive layer (A) and the light-transmitting conductive layer (E), and further a functional material on the pressure-sensitive adhesive layer. You may have. Examples of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer include known pressure-sensitive adhesives such as a rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. The functional material includes a conductive material having a light-transmissive conductive layer on a support, a protective plate made of glass or a resin film, and a hard coat layer, an antireflection layer, an anti-reflection layer on at least one surface of the glass or resin film. Examples thereof include materials having a known functional layer such as a glare layer, a conductive non-metallic layer made of ITO or the like, a light shielding layer, a decorative layer, and the like.

  As the pressure-sensitive adhesive layer, an optical pressure-sensitive adhesive tape using a highly transparent acrylic pressure-sensitive adhesive exemplified in JP-A-9-251159, JP-A-2011-74308 and the like, and JP-A-2009-48214 Moreover, you may use the hardened | cured material of highly transparent curable resin illustrated by Unexamined-Japanese-Patent No. 2010-257208 etc. Both optical adhesive tapes and highly transparent curable resins are commercially available, and the former is a highly transparent adhesive transfer tape (8146-1 / 8146-2 / 8146-3 / 8146-) from 3M Japan. 4), an optical transparent adhesive sheet (LUCIACS (registered trademark) CS9864UAS / CS9864UA, etc.) can be exemplified from Nitto Denko Corporation, and the latter includes an optical elastic resin SVR (registered trademark) series (SVR1150) from Dexerials Corporation. , SVR1320, etc.), WORLD ROCK (registered trademark) series (HRJ (registered trademark) -46, HRJ-203, etc.) from Kyoritsu Chemical Industry Co., Ltd., UV curable optical transparent adhesive Loctite (from Henkel Japan Ltd.) Registered Trademark) LOCA Series (Loctite 3192, Locit 3193, etc.) and the like can be exemplified, it is possible to obtain them use.

  The conductive material laminate 10 of the present invention can be preferably used for forming a liquid crystal display integrated touch panel sensor, but the application is not limited thereto. For example, as described in JP-A-2015-106114, it is known to combine a polarizing plate and a phase difference plate for the purpose of improving external light reflection of an organic EL display or reflection of a background. Instead of the polarizing plate, the conductive material laminate 10 of the present invention may be used to form an organic EL display integrated touch panel sensor. When the conductive material laminate 10 of the present invention is used to form a liquid crystal display integrated touch panel sensor, other members of the related liquid crystal display are not limited, and include a protective plate made of glass or a resin film, a prism sheet, a light diffusion plate, Known liquid crystal display members such as a light guide plate, a brightness enhancement film, and a backlight can be used.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, this invention is not limited to a following example, unless the summary is exceeded.

<Production of iodine-based polarizing layer>
A polyvinyl alcohol film (VF-PS # 7500 manufactured by Kuraray Co., Ltd.) having an average polymerization degree of 2400 and a thickness of 75 μm was subjected to various treatments in the following order to obtain an iodine-based polarizing layer having a thickness of 24 μm.

(Swelling treatment)
Pure water was used as the swelling treatment liquid. The polyvinyl alcohol film was immersed in a swelling treatment solution at 30 ° C. for 1 minute and swollen while being stretched.

(Dyeing process)
As the dyeing solution, an aqueous solution having an iodine concentration of 0.05% by mass and a potassium iodide concentration of 0.35% by mass was used. The swollen polyvinyl alcohol film was immersed in a dyeing solution at 30 ° C. for 40 seconds and dyed while being stretched.

(Crosslinking treatment)
As the crosslinking treatment solution, an aqueous solution containing 3% by mass of boric acid and 3% by mass of potassium iodide was used. The dyed polyvinyl alcohol film was immersed in a crosslinking treatment solution at 40 ° C. for 30 seconds and crosslinked while being stretched.

(Extension process)
As the stretching treatment solution, an aqueous solution containing 4% by mass of boric acid and 5% by mass of potassium iodide was used. The crosslinked polyvinyl alcohol film was stretched while immersed in a stretching solution at 60 ° C. for 60 seconds.

(Cleaning process)
As the cleaning treatment solution, an aqueous solution containing 3% by mass of potassium iodide was used. The stretched polyvinyl alcohol film was immersed in a cleaning liquid at 30 ° C. for 10 seconds.

(Drying process)
The washed polyvinyl alcohol film was dried with a dryer at 60 ° C. for 4 minutes.

<Preparation of silver salt photosensitive material>
A triacetyl cellulose film having a thickness of 100 μm was used as the light transmissive support. The light transmissive support had a total light transmittance of 91.3% and a haze of 0.5%.

  Next, a physical development nucleus layer coating solution having the following composition was coated on a light-transmitting support and dried to provide a physical development nucleus layer.

<Preparation of palladium sulfide sol>
Liquid A Palladium chloride 5g
Hydrochloric acid 40mL
Distilled water 1000mL
B liquid sodium sulfide 8.6g
Distilled water 1000mL
Liquid A and liquid B were mixed with stirring, and 30 minutes later, the solution was passed through a column filled with an ion exchange resin to obtain palladium sulfide sol.

<Physical development nucleus layer coating solution / per 1 m ² >
The palladium sulfide sol (as solid content) 0.5mg
2% by mass aqueous glyoxal solution 0.2mL
Surfactant (S-1) 4mg
Denacol (registered trademark) EX-830 25mg
(Polyethylene glycol diglycidyl ether manufactured by Nagase ChemteX Corporation)
10% by mass of Epomin (registered trademark) SP-200 aqueous solution 0.1 g
(Nippon Shokubai Polyethyleneimine; number average molecular weight 10,000)

  Subsequently, an intermediate layer, a silver halide emulsion layer, and a protective layer having the following composition were coated on the physical development nucleus layer in order from the side closest to the light-transmitting support and dried to obtain a silver salt photosensitive material. . The silver halide emulsion contained in the silver halide emulsion layer was produced by a controlled double jet method. The silver halide grains contained in this silver halide emulsion were prepared so that the average particle diameter was 0.15 μm with 95 mol% of silver chloride and 5 mol% of silver bromide. The silver halide grains thus obtained were subjected to gold sulfur sensitization using sodium thiosulfate and chloroauric acid according to a conventional method. The silver halide emulsion thus obtained contains 0.5 g of gelatin as a protective colloid (binder) per 1 g of silver.

<Intermediate layer composition / per 1 m ² >
Gelatin 0.5g
Surfactant (S-1) 5mg
Dye 1 5mg

<Silver halide emulsion layer composition / 1m ² per>
Silver halide emulsion 3.0g Silver equivalent 1-Phenyl-5-mercaptotetrazole 3mg
Surfactant (S-1) 20mg

<Protective layer composition / per 1 m ² >
1g of gelatin
Amorphous silica matting agent (average particle size 3.5μm) 10mg
Surfactant (S-1) 10mg

<Preparation of diffusion transfer developer>
A diffusion transfer developer having the following composition was prepared.
Potassium hydroxide 25g
Hydroquinone 18g
1-phenyl-3-pyrazolidone 2g
Potassium sulfite 80g
N-methylethanolamine 15g
Potassium bromide 1.2g
The total amount was adjusted to 1000 mL with water and pH = 12.2.

<Production of Conductive Material 1-1>
The above-described silver salt photosensitive material was brought into close contact with the transmission original 1 (positive type) shown in FIG. 2 and exposed through a resin filter that cut light of 400 nm or less with a contact printer using a mercury lamp as a light source. Then, after immersing in the above-mentioned diffusion transfer developer at 20 ° C. for 60 seconds, the silver halide emulsion layer, the intermediate layer, and the protective layer were subsequently washed away with warm water at 40 ° C. and dried. Thus, a conductive material 1-1 corresponding to the transparent original 1 was obtained. The transparent original 1 includes a sensor part 41 having a mesh-like metal fine line pattern in the conductive material 1-1, terminal parts 42 and 42 ', and peripheral wiring parts 43 and 43 that electrically connect the sensor part and the terminal part. It has a pattern corresponding to '. The sensor unit 41 is configured by a plurality of sensors (for example, 41a, 41b, 41c, and the like) having a mesh-like metal fine line pattern made of a square unit lattice arranged in the y direction in the figure. The terminal portions 42 and 42 'are portions for electrically connecting the sensor portion 41 and the outside, and a plurality of terminals (42a, 42b, 42c, 42 in the figure) are selected according to the number of sensors included in the sensor portion 41. 'a, 42'b, 42'c, etc.). Peripheral wiring parts 43 and 43 ′ are a plurality of peripheral wirings (43a, 43b, 43c, 43′a, 43 ′ in the figure) that electrically connect the sensor part 41 and the terminal part 42 and the sensor part 41 and the terminal part 42 ′. b, 43'c, etc.). The sensor 41a is electrically connected to the terminals 42a and 42'a via the peripheral wirings 43a and 43'a. The terminal portions 42 and 42 'and the peripheral wiring portions 43 and 43' are all solid patterns (filled patterns). The line width of the fine metal wire constituting the mesh-like fine metal wire pattern included in the sensor unit 41 is 5.0 μm, and the length of one side of the square of the unit cell is 300 μm. Further, the line widths of the peripheral wirings constituting the peripheral wiring parts 43 and 43 ′ are all 40 μm, and the shortest distance between adjacent peripheral wirings is 30 μm. The conductive material 1-1 thus obtained has the same line width as that of the above-described transmission original, the aperture ratio of the mesh-like fine metal line pattern included in the sensor unit 41 is 96.7%, and the thickness of the fine metal line is It was 0.15 μm.

<Preparation of conductive material 1-2>
In the production of the conductive material 1-1, a conductive material 1-2 corresponding to the transparent original 2 was obtained in the same manner except that the transparent original 2 (positive type) shown in FIG. 3 was used. The transparent original 2 has a pattern corresponding to the sensor part 51 having the mesh-like metal fine line pattern in the conductive material 1-2, the terminal part 52, and the peripheral wiring part 53 that electrically connects the sensor part and the terminal part. Have. The sensor unit 51 is configured by a plurality of sensors (for example, 51 a, 51 b, 51 c, etc.) having a mesh-like metal fine line pattern made of a square unit lattice arranged in the x direction in the figure. The terminal part 52 is a part for electrically connecting the sensor part 51 and the outside, and is composed of a plurality of terminals (52a, 52b, 52c, etc. in the figure) according to the number of sensors included in the sensor part 51. The The peripheral wiring part 53 includes a plurality of peripheral wirings (53a, 53b, 53c, etc. in the figure) that electrically connect the sensor part 51 and the terminal part 52. The sensor 51a is electrically connected to the terminal 52a through the peripheral wiring 53a. The terminal part 52 and the peripheral wiring part 53 are all solid patterns (filled patterns). The line width of the fine metal wire constituting the mesh-like fine metal wire pattern included in the sensor unit 51 is 5.0 μm, and the length of one side of the square of the unit cell is 300 μm. The line widths of the peripheral wirings constituting the peripheral wiring part 53 are all 40 μm, and the shortest distance between adjacent peripheral wirings is 30 μm. The conductive material 1-2 thus obtained has the same line width as that of the above-described transmission original, the aperture ratio of the mesh-like fine metal line pattern included in the sensor unit 51 is 96.7%, and the thickness of the fine metal line is It was 0.15 μm.

<Preparation of conductive material 2-1>
The conductive material 1-1 is immersed in a 0.1% by mass sodium sulfide aqueous solution at 30 ° C. for 10 seconds and washed with water, so that the fine metal wire constituting the mesh-like fine metal wire pattern of the sensor part 41, the terminal part 42 The conductive material 2-1 provided with the dark color layer was obtained by sulfiding the surfaces of the terminals constituting the terminals 42 and 42 'and the peripheral wiring constituting the peripheral wiring parts 43 and 43' except for the light-transmitting support.

<Preparation of Conductive Material 3-1>
A triacetyl cellulose film having a thickness of 100 μm was used as the light transmissive support. The light transmissive support had a total light transmittance of 91.4% and a haze of 0.5%. A copper foil having a thickness of 3.0 μm was bonded onto the light transmissive support using an adhesive.

Next, a negative dry film resist (SUNFORT (registered trademark) series SPG manufactured by Asahi Kasei Co., Ltd.) was bonded onto the copper foil. Further, an exposure of 100 mJ / cm ² is carried out without passing through a resin filter that cuts light of 400 nm or less with a contact printer using a mercury lamp as a light source. Then, it was developed for 40 seconds while rocking in a 1% by mass aqueous sodium carbonate solution at 30 ° C. Subsequently, using an aqueous iron (III) chloride solution having a specific gravity of 1.45, the exposed portion of the copper foil was removed by etching and washed with water. Finally, the remaining resist was peeled and removed with a 3% by mass sodium hydroxide aqueous solution at 40 ° C., washed with water and dried. Thus, a conductive material 3-1 corresponding to the transparent original 1 was obtained. Similarly to the conductive material 1-1, the conductive material 3-1 is a sensor part 41 having a mesh-like metal fine line pattern, terminal parts 42 and 42 ', and peripheral wiring for electrically connecting the sensor part and the terminal part. It has parts 43 and 43 '. The line width of the fine metal wire constituting the mesh-like fine metal line pattern of the sensor unit 41 is 5.0 μm, the length of one side of the square of the unit cell is 300 μm, the aperture ratio is 96.7%, and the thickness of the fine metal wire is 3. It was 0 μm. The line widths of the peripheral wirings constituting the peripheral wiring part 43 and the peripheral wiring part 43 ′ were all 40 μm, and the shortest distance between adjacent peripheral wirings was 30 μm.

<Preparation of conductive material 3-2>
In the production of the conductive material 3-1, a conductive material 3-2 corresponding to the transparent original 2 was obtained in the same manner except that the transparent original 2 (negative type) shown in FIG. 3 was used. Similarly to the conductive material 1-2, the conductive material 3-2 includes a sensor unit 51 having a mesh-like metal fine line pattern, a terminal unit 52, and a peripheral wiring unit 53 that electrically connects the sensor unit and the terminal unit. Have. The line width of the fine metal wires constituting the mesh-like fine metal line pattern of the sensor unit 51 is 5.0 μm, the length of one side of the square of the unit cell is 300 μm, the aperture ratio is 96.7%, and the thickness of the fine metal wires is 3. It was 0 μm. The line widths of the peripheral wirings constituting the peripheral wiring part 53 were all 40 μm, and the shortest distance between adjacent peripheral wirings was 30 μm.

<Preparation of conductive material 4-1>
The conductive material 3-1 is immersed in a mixed aqueous solution containing 3.0% by mass of sodium chlorite and 1.5% by mass of sodium hydroxide at 90 ° C. for 180 seconds and washed with water, thereby the sensor unit 41. The light-transmitting support side of the metal wires constituting the mesh-like metal wire pattern, the terminals constituting the terminal portions 42, and the terminal portions 42 ', the peripheral wiring portions 43, and the peripheral wires constituting the peripheral wiring portions 43' A conductive material 4-1 provided with a dark color layer was obtained by oxidizing the surface excluding.

<Preparation of conductive material 4-2>
One side of the 3.0 μm thick copper foil was immersed in a mixed aqueous solution containing 3.0% by mass of sodium chlorite and 1.5% by mass of sodium hydroxide at 90 ° C. for 180 seconds and washed with water. Thus, one whole surface of copper foil was oxidized and the copper foil with a dark color layer was produced. In the production of the conductive material 3-2, instead of copper foil, the surface having the dark color layer of the copper foil with dark color layer was similarly used except that it was bonded onto the light-transmitting support using an adhesive. Material 4-2 was obtained. Similar to the conductive material 3-2, the conductive material 4-2 includes a sensor unit 51 having a mesh-like metal fine line pattern, a terminal unit 52, and a peripheral wiring unit 53 that electrically connects the sensor unit and the terminal unit. However, the fine metal wire constituting the mesh fine metal wire pattern of the sensor part 51, the terminals constituting the terminal part 52, and the peripheral wiring constituting the peripheral wiring part 53 are dark layers only on the surface on the light-transmitting support side. Have The line width of the fine metal wires constituting the mesh-like fine metal line pattern of the sensor unit 51 is 5.0 μm, the length of one side of the square of the unit cell is 300 μm, the aperture ratio is 96.7%, and the thickness of the fine metal wires is 3. It was 0 μm. The line widths of the peripheral wirings constituting the peripheral wiring part 53 were all 40 μm, and the shortest distance between adjacent peripheral wirings was 30 μm.

<Preparation of Conductive Material Laminate 1>
The conductive material 1-1, the conductive material 1-2, and the iodine-based polarizing layer were cut into a sheet having the same size. Next, the surface of the conductive material 1-1 where the sensor part 41, the terminal parts 42 and 42 ′, the peripheral wiring parts 43 and 43 ′ are not formed, and one surface of the iodine-based polarizing layer are combined with an acetoacetyl group. Adhesion was performed using a water-soluble adhesive containing modified polyvinyl alcohol (Goseinex Z-200, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.). Next, the other surface of the iodine-based polarizing layer and the surface of the conductive material 1-2 on which the sensor unit 51, the terminal unit 52, and the peripheral wiring unit 53 are not formed are modified polyvinyl alcohol having an acetoacetyl group. The conductive material laminate 1 was obtained by bonding with a water-soluble adhesive containing The sensor portion 41 of the conductive material laminate 1 corresponds to the light transmissive conductive layer (A) in the conductive material laminate of the present invention, and the sensor portion 51 corresponds to the light transmissive conductive layer (E) in the conductive material laminate of the present invention. Each of the fine metal wires constituting the mesh-like fine metal line pattern included in the sensor unit 41 and the sensor unit 51 does not have a dark color layer on the viewing side surface.

<Preparation of Conductive Material Laminate 2>
In the production of the conductive material laminate 1, a conductive material laminate 2 was obtained in the same manner except that the conductive material 2-1 was used instead of the conductive material 1-1. The sensor part 41 of the conductive material laminate 2 corresponds to the light transmissive conductive layer (A) in the conductive material laminate of the present invention, and the sensor part 51 corresponds to the light transmissive conductive layer (E) in the conductive material laminate of the present invention. The fine metal wire constituting the mesh-like fine metal line pattern included in the sensor unit 41 has a dark color layer on the viewing side surface, while the fine metal wire constituting the mesh-like metal fine line pattern included in the sensor unit 51 is the dark color layer on the viewing side surface. Does not have.

<Preparation of Conductive Material Laminate 3>
In the production of the conductive material laminate 1, a conductive material laminate is similarly obtained except that the conductive material 3-1 is used instead of the conductive material 1-1 and the conductive material 3-2 is used instead of the conductive material 1-2. 3 was obtained. The sensor portion 41 of the conductive material laminate 3 corresponds to the light transmissive conductive layer (A) in the conductive material laminate of the present invention, and the sensor portion 51 corresponds to the light transmissive conductive layer (E) in the conductive material laminate of the present invention. Each of the fine metal wires constituting the mesh-like fine metal line pattern included in the sensor unit 41 and the sensor unit 51 does not have a dark color layer on the viewing side surface.

<Preparation of Conductive Material Laminate 4>
In the production of the conductive material laminate 1, a conductive material laminate is similarly obtained except that the conductive material 4-1 is used instead of the conductive material 1-1 and the conductive material 3-2 is used instead of the conductive material 1-2. 4 was obtained. The sensor portion 41 of the conductive material laminate 4 corresponds to the light transmissive conductive layer (A) in the conductive material laminate of the present invention, and the sensor portion 51 corresponds to the light transmissive conductive layer (E) in the conductive material laminate of the present invention. The fine metal wire constituting the mesh-like fine metal line pattern included in the sensor unit 41 has a dark color layer on the viewing side surface, while the fine metal wire constituting the mesh-like metal fine line pattern included in the sensor unit 51 is the dark color layer on the viewing side surface. Does not have.

<Preparation of Conductive Material Laminate 5>
In the production of the conductive material laminate 1, a conductive material laminate is similarly obtained except that the conductive material 4-1 is used instead of the conductive material 1-1 and the conductive material 4-2 is used instead of the conductive material 1-2. 5 was obtained. The sensor portion 41 of the conductive material laminate 5 corresponds to the light transmissive conductive layer (A) in the conductive material laminate of the present invention, and the sensor portion 51 corresponds to the light transmissive conductive layer (E) in the conductive material laminate of the present invention. Each of the fine metal wires constituting the mesh-like fine metal line pattern of the sensor part 41 and the sensor part 51 has a dark color layer on the viewing side surface.

<Visibility evaluation of reticulated metal fine wire pattern>
A matte black resin plate is prepared, and each of the conductive material laminates 1 to 5 is arranged with the sensor part 41, the terminal parts 42 and 42 ', and the peripheral wiring parts 43 and 43' formed on the sensor part. 51, a terminal portion 52 and a peripheral wiring portion 53 are formed on a matte black resin plate so that the surface on the matte black resin plate side is on the bottom (illumination of about 500 lux white fluorescent lamp) Illuminated with. Under these conditions, the conductive material laminates 1 to 5 were visually observed from a distance of 30 cm, and the visibility of the sensor unit 41 was evaluated. The results of evaluation based on the following criteria are shown in Table 1.

Visibility evaluation standard “4” of mesh-like metal fine line pattern: When 0 to 1 person visually recognizes sensor part 41 among 10 observers, “3”: 2-3 observers among 10 observers are sensor part 41 "2": When 10 to 10 observers visually recognize the sensor unit 41 "1": When 10 or more observers visually recognize the sensor unit 41

  From the results in Table 1, the effectiveness of the present invention can be seen.

A, E Light transmissive conductive layer B, D Light transmissive support C Iodine polarizing layer 10 Conductive material layered body 21, 31 Mesh-like metal fine wire pattern 22, 32 Metal fine wire 23 Dark color layer 41 Sensor portions 41a, 41b, 41c Sensor 42, 42 'Terminal part 42a, 42b, 42c, 42'a, 42'b, 42'c Terminal 43, 43' Peripheral wiring part 43a, 43b, 43c, 43'a, 43'b, 43'c periphery Wiring 51 Sensor parts 51a, 51b, 51c Sensor 52 Terminal parts 52a, 52b, 52c Terminal 53 Peripheral wiring parts 53a, 53b, 53c Peripheral wiring

Claims (1)

  From the viewing side, a light-transmitting conductive layer (A) having a mesh-like fine metal wire pattern, a light-transmissive support (B), an iodine-based polarizing layer (C), a light-transmissive support (D), a mesh-like metal fine wire Having a light-transmitting conductive layer (E) having a pattern in at least this order, and having a dark color layer on the viewing side of the fine metal wire constituting the mesh-like thin metal wire pattern of the light-transmitting conductive layer (A) The conductive material laminate, wherein the light-transmitting conductive layer (E) has no dark color layer on the viewing side of the fine metal wires constituting the mesh-like fine metal wire pattern.