JP2011096518A - Three-dimensional conductive molding and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional conductive molding with superior heat resistance and abrasion resistance. <P>SOLUTION: The three-dimensional conductive molding 1 includes a molding 8 with a conductive pattern layer 6 or the conductive pattern layer 6 and an insulating pattern layer 7 formed thereon, and a resin binder 33 of the layer(s) is formed of a postcure type of an ionizing radiation curing resin including conductive nanofiber 3. A surface of the molding 8 includes a plane and a three-dimensional surface. The conductive pattern layer 6 is formed on at least the three-dimensional surface. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a three-dimensional conductive molded article in which a conductive pattern layer composed of a binder resin and conductive nanofibers is formed on the surface of a substrate.

  Conventionally, as a method for producing a conductive molded body (conductive molded article) by forming a conductive layer made of a binder resin and ultrafine conductive fibers (conductive nanofibers) on the surface of a substrate, there has been the invention of Patent Document 1. It was. The binder resin of the present invention is a transparent thermoplastic resin (polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polymethyl methacrylate, nitrocellulose, chlorinated polyethylene, chlorinated polypropylene, vinylidene fluoride), heat, ultraviolet rays, A transparent curable resin (silicone resin such as melamine acrylate, urethane acrylate, epoxy resin, polyimide resin, acrylic modified silicate) that is cured by electron beam or radiation is used, and ultra-fine conductivity in a solution in which binder resin is dissolved in volatile solvent The coating liquid in which the fibers are dispersed is applied to the surface of the base material, the coating liquid is dried, and a part of the coating liquid is fixed to the base material via the layer made of the binder resin. It was.

Japanese Patent Publication No. 2006-519712

  However, since the above-mentioned transparent thermoplastic resin does not provide sufficient heat resistance and wear resistance, there is a problem that when used for a long period of time, the fine conductive fibers fall off from the conductive layer or are destroyed and the conductivity is lowered. there were. In addition, since a transparent curable resin is not flexible, there is a problem that the conductive layer is torn in the three-dimensionally shaped portion and the conductivity is lowered or a crack is generated. Further, when the conductive layer is formed as a pattern, the pattern becomes completely visible from the appearance, resulting in a molded article with poor appearance and poor design, and there is also a security problem.

  In order to solve the above-described problems, the present invention provides a molded body having a three-dimensional surface and at least the three-dimensional surface, wherein conductive nanofibers are dispersed in a resin binder, and the conductive nanofibers are interposed therebetween. And a conductive pattern layer that is electrically conductive, and a resin binder made of a post-curing type ionizing radiation curable resin. The conductive nanofiber may be a silver nanowire. The conductive pattern layer may include a plurality of minute pinholes having a size that cannot be visually recognized.

  Furthermore, the present invention is a three-dimensional conductive molded article further comprising an insulating pattern layer formed so as to be continuous with the conductive pattern layer, in which conductive nanofibers are dispersed in a resin binder and insulated from the conductive pattern layer. May be. Further, the insulating pattern layer may be insulated from the conductive pattern layer by disconnecting the conductive nanofiber. The insulating pattern layer may include a narrow groove having a width that cannot be visually recognized. The insulating pattern layer may be insulated from the conductive pattern layer by the narrow groove and may be formed into a plurality of islands.

  Furthermore, the present invention provides a process for producing a conductive nanofiber sheet by forming a conductive pattern layer in which conductive nanofibers are dispersed in an uncured or semi-cured resin binder on a base sheet, and a conductive nanofiber. A step of adhering the sheet to at least the three-dimensional surface of the molded body having a three-dimensional surface, and irradiating the conductive pattern layer of the conductive nanofiber sheet adhered to the molded body with ionizing radiation, thereby uncured or semi-cured resin And a step of curing the binder. The present invention also provides a conductive pattern layer in which conductive nanofibers are dispersed in an uncured or semi-cured resin binder and an insulating pattern layer insulated from the conductive pattern layer. A step of producing a nanofiber sheet, a step of adhering the conductive nanofiber sheet to at least a three-dimensional surface of a molded body having a three-dimensional surface, and a conductive pattern layer of the conductive nanofiber sheet adhered to the molded body And a step of curing an uncured or semi-cured resin binder by irradiating with ionizing radiation.

  In the three-dimensional conductive molded article obtained in the present invention, the conductive pattern layer or the resin binder of the conductive pattern layer and the insulating pattern layer is made of a post-curing type ionizing radiation curable resin. Therefore, until obtaining a three-dimensional shape conductive molded product before curing, it has a property that follows the three-dimensional shape portion and has excellent flexibility, and after curing, a resin that has strength, heat resistance, and wear resistance properties Since the conductive nanofibers are fixed by the binder, there is an effect that the conductivity can be maintained even under repeated wear due to exposure to the outer surface.

  Moreover, as for the three-dimensionally shaped electroconductive molded article of this invention, the said electroconductive nanofiber consists of silver nanowire. In addition, a minute pinhole having a size that cannot be visually recognized is formed in the conductive pattern layer. Therefore, the conductive pattern layer can be nearly colorless and transparent, and by providing the minute pinholes, the difference in light transmittance with respect to portions other than the conductive pattern layer can be reduced. In addition, the three-dimensional conductive molded product obtained in the present invention is a conductive nanofiber in which the conductive nanofiber included in the insulating pattern layer is disconnected. Accordingly, the difference in hue and optical characteristics between the conductive pattern layer and the insulating pattern layer can be almost eliminated. Further, in the three-dimensional conductive molded product obtained in the present invention, narrow grooves having a width that cannot be visually recognized are formed in the insulating pattern layer, and the insulating pattern layers are formed into a plurality of islands by the narrow grooves. ing. Therefore, an insulating pattern layer having the same appearance as the conductive pattern layer can be obtained even if the conductive nanofiber is included. As described above, the conductive pattern can be made inconspicuous, and by providing a beautiful decorative layer, it is possible to obtain a molded product having excellent design properties, and there is an effect that a security problem can be solved.

  Furthermore, the manufacturing method of the three-dimensional shape electroconductive molded article obtained by this invention is a conductive pattern layer or a conductive pattern layer and an insulating pattern containing conductive nanofibers and an uncured or semi-cured resin binder on a base sheet. A layer is formed to produce a conductive nanofiber sheet, and the conductive nanofiber sheet is adhered onto the molded body to obtain a three-dimensional conductive molded article. Alternatively, a semi-cured resin binder is cured. Therefore, there is an effect that it is possible to produce a solid three-dimensional conductive molded article that is tough and excellent in heat resistance and wear resistance without tearing the conductive layer in the three-dimensional shape portion and lowering the conductivity or generating cracks.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic sectional drawing which showed the structure of the solid-shaped electroconductive molded article of this invention, The (1) is that the resin binder of an electroconductive pattern layer consists of a post-curing type ionizing radiation curable resin, and an electroconductive pattern layer visually A case where a pinhole of a size that cannot be recognized is formed is shown. (2) shows that the resin binder of the conductive pattern layer and the insulating pattern layer is made of a post-curing type ionizing radiation curable resin, The case where the conductive nanofiber contained in the insulating pattern layer is a disconnected conductive nanofiber is shown. (3) shows that the resin binder of the conductive pattern layer and the insulating pattern layer is a post-curing type ionizing radiation curable resin. Thus, a narrow groove having a width that cannot be visually recognized is formed in the insulating pattern layer, and the insulating pattern layer is formed into a plurality of islands by the narrow groove. It shows the case to have. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which showed the manufacturing method of the solid-shaped electroconductive molded article of this invention, The (1) is a conductive pattern which contains conductive nanofiber and an uncured or semi-cured resin binder on a base sheet (2) shows a process of forming a layer, and (2) irradiates the conductive pattern layer with a laser to burn out a binder resin in a part of the conductive pattern layer to form a fine pinhole, A process of forming an insulating pattern layer by disconnecting a part of conductive nanofibers included in part is shown. (3) is a three-dimensional conductive molded product by bonding the prepared conductive nanofiber sheet on a molded body. (4) irradiates the obtained three-dimensional shape conductive molded article with ionizing radiation, and uncured or semi-cured resin binder of the conductive pattern layer and the insulating pattern layer. It shows a-cured process. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which showed the manufacturing method of the solid-shaped electroconductive molded article of this invention, The (1) is a conductive pattern which contains conductive nanofiber and an uncured or semi-cured resin binder on a base sheet The process of forming a conductive nanofiber sheet by forming a layer is shown. (2) shows the three-dimensional conductive molding by removing the substrate sheet by bonding the prepared conductive nanofiber sheet onto the molded body. The process of obtaining the product is shown, and (3) shows a plurality of island-like shapes in which a narrow groove having a width that cannot be visually recognized by irradiating a laser on the conductive pattern layer of the obtained three-dimensionally shaped conductive molded product. Shows the process of forming the insulating pattern layer, and (4) irradiates the solid conductive molded article with ionizing radiation to cure the uncured or semi-cured resin binder of the conductive pattern layer and the insulating pattern layer. Let It shows the degree.

  Hereinafter, the three-dimensional conductive molded article of the present invention will be described. In the three-dimensional shape conductive molded article 1 of the present invention, the conductive pattern layer 6 or the conductive pattern layer 6 and the insulating pattern layer 7 are formed on the molded body 8, and the resin binder 33 of these layers is a post-curing type ionizing radiation. It consists of curable resin and contains the conductive nanofiber 3 (refer FIG.1, FIG.2, FIG.3). The surface of the molded body 8 is composed of a flat surface and a three-dimensional surface. The conductive pattern layer 6 is formed on at least the three-dimensional surface. The conductive pattern layer 6 or the insulating pattern layer 7 may be formed only on the three-dimensional surface. The surface of the molded body 8 corresponding to the portion where the conductive pattern layer 6 or the insulating pattern layer 7 is formed may be configured by a three-dimensional surface.

  As the molding resin that is a constituent material of the molded body 8, polyethylene, polypropylene, cyclic polyolefin, polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, polymethyl acrylate, polystyrene, nitrocellulose, triacetyl cellulose, polycarbonate, polyethylene terephthalate, Examples thereof include polydimethylcyclohexane terephthalate, ABS resin, polyamide, polyimide, polyethersulfone, polysulfone, polyvinyl acetal, polyetherketone, polyurethane, copolymer resins of these resins, and mixed resins of these resins. The constituent material of the molded body 8 may be other constituent materials such as rubber, metal, wood, glass, ceramics and the like as long as the conductive pattern layer 6 and the insulating pattern layer can be formed on the molded body 8. .

  The post-curing type ionizing radiation curable resin can form a film having excellent flexibility of uncured or anti-cured by heat treatment or a small amount of ionizing radiation (ultraviolet ray, electron beam, etc.). Any resin can be used as long as it has a property that can be cured into a tough film, and the material and composition thereof are not particularly limited. Examples of resins having such properties include organic-inorganic composites containing organic polymers and metal compounds composed of vinyl resins, polyester acrylates, triazine acrylates, glycidyl acrylates, and other polymers and polyfunctionals. Examples thereof include a curable resin composition containing an isocyanate and an ultraviolet absorber.

  The thickness of the conductive pattern layer 6 can be appropriately set in the range of 0.2 to 500 μm. If it is less than 0.2 μm, even the cured ionizing radiation curable resin is insufficient in strength as a layer, and if it exceeds 500 μm, it becomes difficult to form an uncured or anti-cured film.

  Examples of the conductive nanofiber 3 include a carbon nanofiber and a continuous surface by applying an applied voltage or current from the tip of the probe to the surface of a precursor carrying metal ions such as gold, silver, platinum, copper, palladium, and the like. A metal nanowire produced by pulling into a metal, or a peptide formed by adding gold particles to a nanofiber formed by self-organizing graphite nanofiber, peptide or its derivative produced by introducing a source gas onto a substrate and using a CVD method Examples include nanofibers. However, the silver nanowire is most preferable in order to make the conductive pattern layer 6 nearly colorless and transparent and to obtain sufficient conductivity.

In addition, you may form the minute pinhole 5 of the magnitude | size which cannot be recognized visually in the conductive pattern layer 6 (refer FIG. 1 (1)). Many small pinholes 5 provided on the conductive pattern layer 6 is preferably an area 1μm ² ~10000μm ² a size of approximately pinholes that can not be recognized visually, the conductive pattern layer 6 of the area occupied by the minute pinholes 5 It is preferable that the ratio is 20% to 80%. This is because it is technically difficult to make the area of the pinhole less than 1 μm ^2, and if it is smaller than this, it is difficult to transmit light. Further, if the proportion of the area occupied by the minute pinholes is less than 20%, the degree of improvement in light transmittance and the decrease in the haze value are reduced, and if it exceeds 80%, the surface resistance value of the conductive pattern layer 6 is increased and the conductivity is increased. This is because there may be a problem with sex.

  The shape of the minute pinhole 5 may be a circular shape, a polygonal shape, an elliptical shape, an arc shape, or a linear shape, or may be a mixture of pinholes having different shapes. As a method of forming the minute pinhole 5, a conductive pattern layer 6 including the conductive nanofiber 3 is formed on the entire surface of the molded body 8, and a carbon dioxide gas laser having a spot diameter of several tens of μm is formed on a part of the conductive pattern layer 6. A method of forming the conductive pattern layer 6 by burning the binder resin 33 by irradiating the energy beam 50 is used.

  As another method for forming the minute pinhole 5, the conductive pattern layer 6 including the conductive nanofibers 3 is formed on the entire surface of the molded body 8, and a part of the conductive pattern layer 6 is coated or ink-jetted. Examples of the method include forming the etching resist layer by the method, and then etching the entire surface to remove the binder resin 33 of the conductive pattern layer 6 in the portion where the etching resist layer is not formed.

  Examples of the etching resist layer to be used include a photocurable resin, and an organic solvent such as a ketone or an aromatic hydrocarbon that can remove the binder resin 33 of the conductive pattern layer 6 as an etchant is preferable.

  The insulating pattern layer 7 can be obtained by disconnecting the conductive nanofibers 3 of some of the conductive pattern layers 6 or by forming narrow grooves 12 having a width that cannot be visually recognized (FIG. 1). (See (2) and (3)). Therefore, the material is not different from the conductive pattern layer 6 such as the binder resin 33 and the conductive nanofiber 3, and if the thickness is equal, the light transmittance and haze value are almost the same as those of the conductive pattern layer 6. Therefore, the difference between the light transmittance and the haze value from the conductive pattern layer 6 is very small, and as a result, the conductive pattern layer 6 that is hardly noticeable can be formed.

  When the insulating pattern layer 7 is formed by disconnection of the conductive nanofiber 3, the difference in light transmittance between the conductive pattern layer 6 and the insulating pattern layer 7 is 10% or less and the difference in haze value is 5%. It is preferable to strictly measure and manage the light transmittance and haze value so that the thickness is as follows, and the thickness of the insulating pattern layer 7 is preferably as equal to the thickness of the conductive pattern layer 6 as possible.

  As a method for disconnecting the conductive nanofiber 3, a YAG laser having a spot diameter of several tens of μm is used as the energy line 50, and by applying appropriate energy (heat) to the conductive nanofiber 3, the conductive nanofiber 3 And a method of corroding a part of the conductive nanofibers 3 where the etching resist layer is not formed by immersing them in an etchant such as an acid or alkali aqueous solution.

  When the insulating pattern layer 7 is formed by the narrow groove 12 having a width that cannot be visually recognized, the proportion of the occupied area of the groove in the insulating pattern layer 7 is set to the minute pinhole in the conductive pattern layer 6 as much as possible. It is preferable that the thickness of the insulating pattern layer 7 be as equal to the thickness of the conductive pattern layer 6 as much as possible.

  The narrow groove 12 preferably has a width of about 0.1 μm to 150 μm that cannot be visually recognized. This is because it is not only technically difficult to make the width of the narrow groove 12 less than 0.1 μm, but sparking may occur due to a tunnel current. In addition, if the width exceeds 150 μm, the groove may appear shining when illuminated with illumination. The method for forming the narrow groove 12 may be the same as the method for forming the minute pinhole 5.

  The shape of the narrow groove 12 may be a lattice shape, a honeycomb shape, a random shape, or any other shape, and may be a mixture of grooves having different shapes. Further, the island pattern of the insulating pattern layer 7 formed by being surrounded by the narrow grooves 12 may be any of a polygonal shape, an elliptical shape, and an arc shape in addition to a circular shape, and these different shapes are mixed. It doesn't matter. The size of the island pattern may be any of nano-order to millimeter-order, and may be a mixture of these different sizes.

  In addition, as a manufacturing method of the three-dimensionally shaped conductive molded article 1, the conductive pattern layer 6 is formed on the base sheet 10, and the energy ray 50 is irradiated to form the minute pinhole 5, or the narrow groove 12 is formed. The conductive nanofiber 3 is partially disconnected to form the insulating pattern layer 7 to produce the conductive nanofiber sheet 2. The conductive nanofiber sheet 2 is adhered onto the molded body 8 to form a three-dimensionally conductive material. In addition to a method of irradiating ionizing radiation 40 (see FIG. 2), the conductive nanofiber sheet 2 is produced by forming the conductive pattern layer 6 on the base sheet 10 after obtaining the conductive molded article 1. After the nanofiber sheet 2 is adhered on the molded body 8 to obtain the three-dimensional conductive molded article 1, before the ionizing radiation 40 is irradiated, the energy rays 50 are irradiated and the above-described minute pinholes 5 and narrow portions are formed. Or forming a groove 12, a method of forming an insulating pattern layer 7 is broken partially conductive nano fibers 3 (see FIG. 3) can be mentioned.

  Examples of the method for forming the conductive pattern layer 6 and the insulating pattern layer 7 include various printing methods such as gravure printing, offset printing, and screen printing, methods such as coating, and methods such as coating and inkjet.

  Examples of the material of the base sheet 10 include resin films such as acrylic, polycarbonate, polyester, polybutylene terephthalate, polypropylene, polyamide, polyurethane, polyvinyl chloride, and polyvinyl fluoride. The thickness of the base sheet 10 can be appropriately set within a range of 5 to 800 μm. If the thickness is less than 5 μm, the strength as a sheet is insufficient and the sheet is torn when it is peeled off, making it difficult to handle. If the thickness exceeds 800 μm, the base sheet 10 is too rigid and difficult to process. In the case where the conductive nanofiber sheet 2 is used as a transfer sheet, it is preferable to apply a resin such as silicon, melamine, or acrylic on the resin film to form a substrate sheet 10 having releasability (FIG. 3 (2)).

  Further, a release layer, an anchor layer, or the like may be provided between the conductive pattern layer 6 or the insulating pattern layer 7 and the base sheet 10, and an anchor layer, an adhesive layer, or the like is provided on the conductive pattern layer 6 or the insulating pattern layer 7. May be provided. Furthermore, it is preferable to form a position detection pattern having a size of, for example, about 3 to 10 mm square on the base sheet 10. This is because if the position detection pattern is read by an optical method, the minute pinhole 5 or the insulating pattern layer 7 can be formed at a predetermined position on the base sheet 10.

  Examples of a method for producing the three-dimensional conductive molded article 1 using the conductive nanofiber sheet 2 include the following simultaneous molding and decorating method. That is, the conductive nanofiber sheet 2 is set in an injection mold composed of a movable mold and a fixed mold and clamped, and the molten molded body 8 is filled in the injection mold, cooled, and then injected. In this method, the molding die is opened and the three-dimensionally shaped conductive molded product 1 is taken out.

Alternatively, the following thermal bonding (thermal transfer) method can be mentioned. That is, the conductive nanofiber sheet 2 is set on the upper surface of the molded body 8, and a temperature of about 80 to 260 ° C. and a pressure of 50 to 200 kg / from the back surface of the base sheet 10 using a transfer machine equipped with a heat roll made of silicon rubber. a method of pressing in m ² about conditions.

  A release layer was formed with ink made of melamine resin on one side of a biaxially stretched polyethylene terephthalate film having a thickness of 100 μm as a base sheet, and a 5 mm square position detection pattern was formed with ink made of urethane resin.

  Next, conductive nanofibers made of silver nanowires having an average diameter of 0.2 μm and an average length of 10 μm are dispersed in a binder resin made of an organic-inorganic composite containing a silyl group-containing vinyl resin, silicon, and a zirconium chelate compound. Gravure printing was performed using the ink thus prepared, and hot-air drying was performed to form a semi-cured conductive pattern layer having a thickness of 2 μm. Next, the position detection pattern is read by an optical method, the tip of the carbon dioxide laser irradiator is placed at the desired position, heat is applied by the laser irradiation light, and the binder resin of some of the conductive pattern layers is burned out, and a number of micro pins A conductive nanofiber sheet including a conductive pattern layer made of holes and an insulating pattern layer having narrow grooves was formed.

Using the obtained conductive nanofiber sheet, using a feeding device having a positioning mechanism, it was set in an injection mold consisting of a movable mold and a fixed mold and clamped. After mold clamping, an injection mold was filled with a transparent injection molding resin made of a molten acrylic resin. The molding conditions were a resin temperature of 240 ° C., a mold temperature of 55 ° C., and a resin pressure of about 300 kg / cm ² . After cooling, the injection mold is opened, the resin molded product is taken out, the base sheet is peeled off, and then the conductive pattern layer and the insulating pattern layer are irradiated with ultraviolet rays under the conditions of 120 W / cm, two lamps, and a lamp height of 10 cm. As a result of curing, a three-dimensional conductive molded article composed of a conductive pattern layer and an insulating pattern layer that were tough and excellent in heat resistance and wear resistance was obtained.

  The resulting three-dimensional shape conductive molded article does not generate cracks on the curved surface, and even in the interlayer adhesion test (90 mm peel test with Nichiban cellophane tape after cross-cutting to 100 × 100 at 1 mm square) There wasn't. In addition, the conductive pattern layer and the insulating pattern layer have sufficient heat resistance and wear resistance, and the conductive nanofibers were not dropped or broken even when used for a long time.

In addition, the minute pinholes formed in a part of the conductive pattern layer of the obtained three-dimensionally shaped conductive molded product are circular and have an average area of about 180 μm ² and the size cannot be distinguished from the appearance. It occupies about 35% of the total area of the conductive pattern layer, has a light transmittance of 91% and a haze value of 3%, and has a light transmittance of 2% compared to the case where no minute pinhole is formed. The haze value was reduced by 2%. On the other hand, the increase in the surface resistance value remained at about 20%. In addition, the narrow grooves formed in the insulating pattern layer 7 portion of the obtained three-dimensionally shaped conductive molded product are in a lattice shape with a pitch of 35 μm, the average width is about 6 μm, and the width cannot be determined from appearance. Occupies about 40% of the total area of the pattern layer, the light transmittance is 93%, the haze value is also good at 3%, and the light transmittance is improved by 3% compared to the case where no narrow groove is formed, The haze value could also be reduced by 2%. On the other hand, the insulation resistance was sufficient.

  In the production of the conductive nanofiber sheet, a thickness of the conductive pattern layer was changed to 5 μm, and a curable composition containing glycidyl acrylate polymer, polyfunctional isocyanate, and bisbenzotriazole-based UV absorber as active ingredients as a binder resin A conductive nanofiber sheet was prepared in the same manner as in Example 1 except that it was used to obtain a three-dimensionally shaped conductive molded product.

  Similarly to Example 1, the three-dimensional shape conductive molded product obtained by this method has sufficient heat resistance and wear resistance, so that even when used for a long time, the conductive pattern layer and the insulating pattern layer are conductive. Nanofibers were not dropped or destroyed. In addition, no cracks occurred on the curved surface of the molded product, and no peeling occurred in the interlayer adhesion test. The insulating pattern layer had a light transmittance of 92%, a haze value of 4%, and there was almost no difference between the light transmittance and the haze value.

  In making the conductive nanofiber sheet, the position detection pattern is read by an optical method, the tip of the YAG laser irradiator is placed at the desired position, heat is applied by the laser irradiation light, and a part of the conductive nanofiber is removed. A conductive nanofiber sheet was prepared in the same manner as in Example 1 except that it was burned out and a part of the conductive pattern layer was changed to the insulating pattern layer to obtain a three-dimensional conductive molded article.

  Similarly to Example 1, the three-dimensional shape conductive molded product obtained by this method has sufficient heat resistance and wear resistance, so that even when used for a long time, the conductive pattern layer and the insulating pattern layer are conductive. Nanofibers were not dropped or destroyed. In addition, no cracks occurred on the curved surface of the molded product, and no peeling occurred in the interlayer adhesion test. The insulating pattern layer had a light transmittance of 90%, a haze value of 3%, and there was almost no difference between the light transmittance and the haze value.

  A three-dimensional conductive molded article was obtained in the same manner as in Example 1 except that a semi-cured conductive pattern layer was formed and a conductive nanofiber sheet was formed without laser irradiation in the preparation of the conductive nanofiber sheet. Then, the tip of the carbon dioxide laser irradiator is placed at a desired position of the obtained three-dimensional conductive molded product, and heat is applied by the laser irradiation light to burn out the binder resin of the semi-cured conductive pattern layer, and a number of micro pins A conductive pattern layer made of holes and an insulating pattern layer having narrow grooves were formed.

  Similarly to Example 1, the three-dimensional shape conductive molded product obtained by this method has sufficient heat resistance and wear resistance, so that even when used for a long time, the conductive pattern layer and the insulating pattern layer are conductive. Nanofibers were not dropped or destroyed. In addition, no cracks occurred on the curved surface of the molded product, and no peeling occurred in the interlayer adhesion test. The insulating pattern layer had a light transmittance of 91%, a haze value of 3%, and there was almost no difference between the light transmittance and the haze value.

DESCRIPTION OF SYMBOLS 1 3D shape electroconductive molded article 2 Conductive nanofiber sheet 3 Conductive nanofiber 5 Minute pinhole 6 Conductive pattern layer 7 Insulating pattern layer 8 Molded body 9 Narrow groove 10 Base sheet 33 Resin binder 40 Ionizing radiation 50 Energy beam

Claims (8)

A molded body having a three-dimensional surface, and at least formed on the three-dimensional surface, conductive nanofibers are dispersed in a resin binder, and a conductive pattern layer that conducts through the conductive nanofibers,
A three-dimensional conductive molded article, wherein the resin binder comprises a post-curing type ionizing radiation curable resin.   The three-dimensionally shaped conductive molded article according to claim 1, wherein the conductive nanofiber is a silver nanowire.   The three-dimensionally shaped conductive molded article according to claim 1, wherein the conductive pattern layer includes a plurality of minute pinholes having a size that cannot be visually recognized.   4. The semiconductor device according to claim 1, further comprising an insulating pattern layer formed to be continuous with the conductive pattern layer, wherein the conductive nanofibers are dispersed in the resin binder, and is insulated from the conductive pattern layer. A three-dimensional conductive molded article according to claim 1.   The three-dimensionally shaped conductive molded article according to claim 4, wherein the insulating pattern layer is insulated from the conductive pattern layer by disconnection of the conductive nanofibers.   5. The three-dimensional shape according to claim 4, wherein the insulating pattern layer includes a narrow groove having a width that cannot be visually recognized, is insulated from the conductive pattern layer by the narrow groove, and is formed in a plurality of island shapes. Conductive molded product. Forming a conductive nanofiber sheet by forming a conductive pattern layer in which conductive nanofibers are dispersed in an uncured or semi-cured resin binder on a base sheet; and
Adhering the conductive nanofiber sheet to at least the three-dimensional surface of a molded body having a three-dimensional surface;
A step of irradiating the conductive pattern layer of the conductive nanofiber sheet bonded to the molded body with ionizing radiation to cure the uncured or semi-cured resin binder. Production method. A conductive nanofiber sheet is formed by forming a conductive pattern layer in which conductive nanofibers are dispersed in an uncured or semi-cured resin binder and an insulating pattern layer insulated from the conductive pattern layer on a base sheet. And a process of
Adhering the conductive nanofiber sheet to at least the three-dimensional surface of a molded body having a three-dimensional surface;
A step of irradiating the conductive pattern layer of the conductive nanofiber sheet bonded to the molded body with ionizing radiation to cure the uncured or semi-cured resin binder. Production method.

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