JP6133139B2 - Method and apparatus for producing conductive fiber - Google Patents

Description

  The present invention relates to a method and apparatus for producing conductive fibers.

  Conventionally, conductive fiber materials have been widely used for bioelectrodes, biointerfaces, antistatic clothing, and the like, and a technique for producing conductive fibers having homogeneous characteristics is required.

  As a method for producing a conductive fiber, a metal such as copper or silver is coated on the fiber surface by plating (for example, see Non-Patent Document 1), or a conductive polymer is chemically or electrochemically applied to the fiber surface. Those that are fixed by polymerization (for example, see Non-Patent Document 2) are known.

Jayoung Cho, Jihye Moon, Keesam Jeong, and Gilsoo Cho, “An Exploration of Electrolessly Cu / Ni Plated Polyester Fabrics as E-Textiles”, Proceedings of the 2005 Ninth IEEE International Symposium on Wearable Computers (ISWC'05), pp.206 -207, 2005. Seiichi Takamatsu, Takahiko Imai, Takahiro Yamashita, Takeshi Kobayashi, Koji Miyake, Toshihiro Itoh, “Flexible fabric keyboard with conductive polymer-coated fibers”, Proceedings of IEEE Sensors, pp.659-662, 2011.

  However, for example, in the conventional method and apparatus for producing a conductive fiber as shown in FIG. 12, the liquidity of a solution containing a plating solution or a conductive polymer changes due to the influence of temperature and humidity fluctuations. The problem is that it is difficult to produce conductive fibers with uniform electrical resistance because the film thickness of the conductive film such as metal formed by plating or conductive polymer fixed by polymerization varies during the production process for a long time. was there.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a manufacturing method and a manufacturing apparatus for mass-producing conductive fibers having a uniform electrical resistance.

  In order to solve the above-described problems, the conductive fiber manufacturing method of the present invention forms a conductive film on an insulating base fiber by immersing it in a predetermined conductor solution containing a conductive substance. A conductive film forming step of forming conductive fibers, and an electrical resistance value of the conductive fibers by at least one pair of electrodes brought into contact with the conductive fibers while conveying the conductive fibers in the longitudinal direction. And a film thickness control step for controlling the film thickness of the conductive film based on the electrical resistance value of the conductive fiber measured in the resistance value measurement step.

  In the film thickness control step, if the electrical resistance value of the conductive fiber measured in the resistance value measurement step is larger than a predetermined range of electrical resistance value, increase the film thickness of the conductive film, When the electrical resistance value of the conductive fiber measured in the resistance value measurement step is smaller than a predetermined electrical resistance value range, the film thickness of the conductive film is reduced.

  Further, the conductive fiber manufacturing apparatus of the present invention includes a dipping container containing a predetermined conductor solution containing a conductive substance, dipping an insulating base fiber in the dipping container, Conductive film forming means for forming conductive fibers by forming a conductive film, and at least one pair of electrodes brought into contact with the conductive fibers while transporting the conductive fibers in the longitudinal direction. Resistance value measuring means for measuring the electrical resistance value of the conductive fiber, film thickness control means for controlling the film thickness of the conductive film based on the electrical resistance value of the conductive fiber measured by the resistance value measuring means, Conductive fiber winding means for pulling up the conductive fibers from the immersion container and winding the conveyed conductive fibers.

  The conductive fiber winding means may change the winding speed of the conductive fiber in accordance with a control signal from the film thickness control means.

  The conductive solution is a solution containing a conductive polymer as a conductive substance, and the conductive coating film forming unit is configured to control the amount, the temperature, the concentration, the conductive solution according to a control signal from the coating film thickness control unit. You may make it change at least any one of a viscosity.

  The conductive solution is an electroless or electroplating solution containing a metal as a conductive substance, and the conductive coating film forming means is configured to control the amount, temperature, and temperature of the conductive solution according to a control signal from the coating film thickness control means. At least one of the concentration and the pH value may be changed.

  The conductive solution is a solution containing a conductive polymer as a conductive substance, and the conductive film forming means has a movable squeegee capable of contacting or separating from the conductive fiber, and the film thickness control means In accordance with a control signal from, at least one of the distance between the movable squeegee and the conductive fiber and the contact pressure may be changed.

  The resistance value measuring means has two sets of the electrodes arranged at positions spaced apart from each other in the longitudinal direction of the conductive fiber, and measures the electric resistance value of the conductive fiber using the two sets of electrodes. You may do it.

  According to the present invention, since the film thickness of the conductive film formed by feeding back the resistance value of the manufactured conductive fiber is controlled, a manufacturing method for manufacturing a conductive fiber having uniform electrical resistance and A manufacturing apparatus can be provided.

FIG. 1 is a schematic view showing an example of conductive fibers according to an embodiment of the present invention. FIG. 2 is a schematic view showing another example of the conductive fiber according to the embodiment of the present invention. FIG. 3 is a drawing showing an example of the configuration of a conductive fiber manufacturing apparatus according to an embodiment of the present invention, in which the film thickness of the conductive fiber is controlled using a movable squeegee. FIG. 4 is a drawing showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, and controls the film thickness of the conductive fiber by changing the amount and concentration of the conductor solution. Is. FIG. 5 is a view showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, and controls the film thickness of the conductive fiber by changing the temperature of the conductor solution. is there. FIG. 6 is a drawing showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, and controls the film thickness of the conductive fiber by changing the winding speed of the conductive fiber. Is. FIG. 7 is a view showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, in which a rotor-shaped electrode is used as an electrode for measuring the electrical resistance value of the conductive fiber. It is. FIG. 8 is a drawing showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, in which an electrode having a groove is used as an electrode for measuring the electrical resistance value of the conductive fiber. is there. FIG. 9 is a view showing another configuration example of the conductive fiber manufacturing apparatus according to the embodiment of the present invention, in which the electrical resistance value of the conductive fiber is measured using a four-terminal method. FIG. 10 is a flowchart showing a procedure of a method for controlling the film thickness of the conductive fiber according to the embodiment of the present invention. FIG. 11 is a graph showing a measurement example of the electrical resistance value of the conductive fiber according to the embodiment of the present invention. FIG. 12 is a configuration example of a conventional conductive fiber manufacturing apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. First, before explaining the manufacturing method and the manufacturing apparatus according to the present invention, an example of conductive fibers obtained by the manufacturing method and the manufacturing apparatus according to the present invention will be described.

<Conductive fiber>
The conductive fiber 10 shown in FIGS. 1A and 1B is obtained by coating a base fiber 11 with a conductor 12. Fig.1 (a) is sectional drawing of the longitudinal direction of the conductive fiber 10, FIG.1 (b) is sectional drawing of the direction orthogonal to the longitudinal direction. The conductor 12 may include a conductive polymer (conductive polymer), may be formed of only a conductive polymer, or may include other additives. The conductor 12 may be a metal such as copper or silver. The conductive polymer may include PEDOT-PSS {poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid)} as the conductive polymer.

  Since the conductive fiber 10 has the base fiber 11 as a core and the conductor 12 is coated around the conductive fiber 10, the contact area between the two is large, and the conductive fiber 10 is a composite fiber sufficiently bonded to each other. With this configuration, since the conductor 12 is reinforced by the base fiber 11, the strength can be increased as compared with the fiber made of only the conductor 12, and particularly excellent in the dry state and the wet state. It will be. In addition, there is a feature that the flexibility of the base fiber 11 as a core is imparted to the conductive fiber 10.

  The diameter (thickness) of the base fiber 11 is not particularly limited and can be appropriately selected depending on the application. For example, when used for clothing, bioelectrodes, biointerfaces, etc., the diameter is preferably 1 μm to 100 μm. The length of the base fiber 11 is not particularly limited and can be appropriately selected depending on the application. For example, 10 μm to 10 cm may be used as an electrode for implantation in a living tissue, 1 mm to 50 cm when used for a bio-interface on the body surface, and 1 cm to 100 m may be used as a fiber material for weaving or knitting into clothing.

  Moreover, as the base fiber 11, it is not limited to what is shown in FIG. 1 (a), (b), For example, twisting a some base fiber like FIG. A twisted yarn or a blended yarn obtained by blending different types of substrate fibers may be used.

  The base fiber described in the present embodiment includes a fiber bundle obtained by twisting a plurality of base fibers. In addition, the shape of the base fiber is not limited to the above thread shape, and for example, a base fiber such as a string shape, a cloth shape, or a ribbon shape may be used.

  In addition, for the purpose of improving the hydrophilicity of the base fiber 11, a material subjected to plasma treatment, pore treatment, or chemical coating may be used.

  The thickness h of the conductor 12 coated around the base fiber 11 is not particularly limited, and may be, for example, 0.001 to 2 times the diameter L of the base fiber 11. More specifically, for example, when a silk fiber of 2 to 3 denier (D) is used as the base fiber 11, that is, a silk fiber having a fiber diameter of about 10 to 15 μm, a thickness of 0.01 to 10 μm is used. Just do it.

  By covering the periphery of the base fiber 11 with the conductor 12, high conductivity is imparted to the conductive fiber 10, and it becomes easier to bring the plurality of conductive fibers 10 into contact with each other for conduction.

  Moreover, it can be set as the fiber which has the more excellent electroconductivity, without impairing the softness | flexibility of the electroconductive fiber 10 as the thickness of the conductor 12 is the said range. A fiber having high conductivity can be obtained. That is, by adjusting the thickness of the conductor 12, the conductivity or electrical resistance of the conductive fiber 10 can be adjusted.

  Here, as shown in FIG. 2, the conductor 12 is arranged in close contact with the base fiber 11 between the base fibers 11, and the base fibers 11 are twisted or knitted. The conductive fiber 10 can be configured as a higher-order structure such as a twisted string, a woven fabric, or a non-woven fabric. In this case, since the conductor 12 plays a role of bonding the plurality of base fiber 11 to each other, the strength of the higher order structure can be increased. Furthermore, since the conductors 12 can be arranged in a relatively large amount between the plurality of substrate fibers 11, a conductive fiber with higher conductivity can be realized.

  As a fiber space | interval between the some base fiber 11, when the base fiber 11 of diameter 10 micrometers-15 micrometers is used, it can be 0.01 micrometer-50 micrometers, for example. When the fiber spacing is within this range, the conductor 12 can be disposed in a sufficient amount between the fibers.

  Since the conductive fiber 10 of this embodiment has sufficient strength, conductivity, and flexibility even under high humidity use conditions, it is suitably used for clothing as well as bioelectrodes and biointerfaces, for example. Further, by forming a thread or string by bundling a plurality of conductive fibers, sufficient conductivity can be obtained for the measurement of biological signals. Since the conductor is arranged on the surface of the fiber, electrical conduction can be obtained immediately when the fiber and the object to be measured come into contact with each other. Therefore, it is possible to stably record a biological signal for a long period of time by bringing the fiber (yarn) into contact with the measurement object, or ligating, winding, sewing, folding, or the like.

  When a biological electrode is configured using the above-described conductive fiber 10 as an electrode, for example, by binding, knitting, sewing, or bundling a thread bundled with the fiber, a cloth, a belt, Various shapes of bioelectrodes such as a strap can be provided. Furthermore, it is also possible to produce a patch-like (cloth-like) bioelectrode by bonding the conductive fibers 10 and forming them into a nonwoven fabric or the like.

The type of the base fiber 11 is not particularly limited as long as it is made of a polymer (polymer). For example, synthetic fiber, vegetable fiber, animal fiber, or the like is used. Examples of the synthetic fiber include nylon, polyester, acrylic, aramid, polyurethane, and carbon fiber. Examples of the vegetable fiber include cotton, hemp and jute. Examples of the animal fibers include silk, wool, collagen, and elastic fibers constituting animal tissues.

  Among the base fiber materials exemplified above, animal fibers having excellent adhesion to the conductor 12, high strength in the dry and wet states, and flexibility suitable for uses such as clothing. (Protein-containing fiber) is preferred. Furthermore, when PEDOT-PSS is contained as the conductor 12, silk (silk) fibers that are particularly excellent in adhesion and hydrophilicity to PEDOT-PSS are more preferable. Examples of silk fibers that can be used as the base fiber 11 include natural silk fibers of spiders, spiders, and bees, and artificial silk fibers using genetic recombination techniques. Silk, which contains a protein called fibroin, is a fiber with excellent hydrophilicity, biocompatibility, and dyeability, as used in clothing and surgical threads. It is the fiber that has long been used by mankind. Since it is one, it is suitably used as the base fiber 11.

  The silk fiber used for the base fiber 11 may be either an unprocessed raw silk from which sericin as a colloid component has not been removed, or a kneaded yarn from which part or all of sericin has been removed. From the viewpoint of increasing the adhesion and fiber strength, a kneaded yarn is more preferable. The inventors of the present invention have found that the adhesion between PEDOT-PSS and a fiber containing a protein such as silk is particularly excellent, and the adhesive surfaces of both are not easily peeled off. Based on this knowledge, in the present embodiment, it is more preferable to use silk fiber as the base fiber 11 and PEDOT-PSS as the conductive polymer contained in the conductor 12. However, the base fiber used in the present embodiment is not limited to silk fiber, and other general fiber materials can be used without any limitation.

  Below, in the conductive fiber 10 in which the base fiber 11 is the core and the conductor 12 is coated around the base fiber 11, the conductor 12 is a conductive polymer, and PEDOT-PSS is included as the conductive polymer. 2 shows a technique for particularly improving the conductivity of the conductive fiber 10 and improving the affinity with a living tissue (skin or tissue) when used as a living body electrode.

  In the present embodiment, when a conductive polymer is used as the conductor, it is essential to include PEDOT-PSS as the conductive polymer, and other conductive polymers that can be used include polyaniline sulfonic acid. And polypyrrole. Thus, the conductive polymer contained in the conductor 12 may be one type, or two or more types may be used in combination.

The conductive polymer used in the present embodiment is PEDOT-PSS {poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid)} that is excellent in conductivity and hydrophilicity. This PEDOT-PSS is a conductive polymer obtained by polymerizing 3,4-ethylenedioxythiophene as a monomer in the presence of poly (4-styrenesulfonic acid). Here, PSS functions as a dopant that imparts a negative charge to PEDOT. In the present embodiment, it is preferable that the conductive polymer contains a dopant from the viewpoint of increasing the conductivity of the conductive fiber 10.
In addition, the molecular weight of the conductive polymer used in the present embodiment is not particularly limited, and for example, a molecular weight in the range of several thousand to several hundred thousand can be used.

  In the present embodiment, when the conductive fiber 10 is manufactured by a manufacturing method and a manufacturing apparatus to be described later, first, the base fiber 11 is immersed in the solution of the conductor 12 so that the conductor 12 is attached to the base fiber 11. Is impregnated and / or deposited. At this time, the solution of the conductor 12 includes a diluent solvent in addition to the conductive polymer PEDOT-PSS, and may further contain additives other than the conductive polymer as necessary.

  Examples of the additive include glycerol, sorbitol, polyethylene glycol, polyethylene glycol-polypropylene glycol copolymer, ethylene glycol, sphingosine, phosphatidylcholine, and the like. One type of additive contained in the conductor 12 may be used, or two or more types may be used in combination.

  The above additives are used for the purpose of adjusting the wetting characteristics of the conductive fibers and for improving the affinity with a living tissue (skin or tissue) when used as a living body electrode by imparting flexibility. be able to. Specific examples of the adjustment of the wettability include adjustment of water absorption and prevention of excessive expansion / contraction during wetting / drying. When PEDOT-PSS and an additive are used in combination, wetting characteristics of the conductor 12 can be easily adjusted, and particularly, from the viewpoint of preventing excessive expansion and contraction. One reason for this is considered that the PEDOT-PSS having high water absorption in the conductor 12 is preliminarily contained together with the additive, so that there is less room for moisture to enter.

  Among the above examples, glycerol, polyethylene glycol, and polyethylene glycol-polypropylene glycol copolymers are particularly preferable as additives used for the purpose of adjusting the wetting characteristics of PEDOT-PSS and imparting flexibility. The conductive fiber 10 including the conductor 12 containing the additive and PEDOT-PSS does not cause excessive water absorption even when used in a high humidity environment, has high fiber strength, and is excellent in conductivity. It will be. In addition, because it also has excellent flexibility, PEDOT-PSS's stiff feel (rigidity) is alleviated, and because it has excellent contact and affinity with living tissue, it can measure biological signals with less noise Can be configured.

  In addition, as an additive contained in the conductor 12, it is not limited to said example, For example, well-known organic solvents, such as surfactant, alcohol, natural polysaccharide, sugar alcohol, acrylic resin, dimethylsulfoxide, etc. It can also be used.

  Examples of the surfactant include known cationic surfactants, anionic surfactants, and nonionic surfactants. These surfactants may be used individually by 1 type, and may be used in combination of 2 or more type.

  Examples of the cationic surfactant include quaternary alkyl ammonium salts and halogenated alkyl pyridiniums. Examples of the anionic surfactant include alkyl sulfates, alkylbenzene sulfonates, alkyl sulfosuccinates, and fatty acid salts. Moreover, as said nonionic surfactant, polyoxyethylene, polyoxyethylene alkyl ether etc. are mentioned, for example.

  As said alcohol, well-known monohydric alcohol and polyhydric alcohol can be used widely. These alcohols may be used individually by 1 type, and may be used in combination of 2 or more type. Examples of the monohydric alcohol include methanol, ethanol, propyl alcohol, isopropyl alcohol, and butanol. The carbon skeleton constituting these alcohols may be linear, branched or cyclic.

  Examples of the polyhydric alcohol include glycols such as ethylene glycol, chain polyhydric alcohols such as glycerin, cyclic polyhydric alcohols such as glucose and sucrose, polyethylene glycol and polyvinyl alcohol, polyethylene glycol, and polypropylene glycol copolymers. Examples thereof include polymeric polyhydric alcohols.

  Examples of the natural polysaccharide include chitosan, chitin, glucose, aminoglycan and the like. Examples of the sugar alcohol include sorbitol, xylitol, erythritol, and the like. Examples of the acrylic resin include polyacrylic acid, polymethyl methacrylate, and polymethyl methacrylate resin.

  Hereinafter, embodiments of the above-described method and apparatus for producing conductive fibers according to the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment.

  First, the manufacturing apparatus used in this embodiment will be described. Since the method for controlling the film thickness of the conductive film differs depending on the type of conductor (conductive polymer, metal), the following description will explain the method for controlling the film thickness of the conductive film for each type of conductor. .

<When the conductor 12 includes a conductive polymer (conductive polymer)>
<Manufacturing equipment>
A conductive fiber manufacturing apparatus 10 (hereinafter sometimes abbreviated as a manufacturing apparatus) 10 shown in FIG. 3 includes a thread winding 20 around which a base fiber 11 is wound, and a conductive coating film forming unit 30. Conductor solution 31 containing PEDOT-PSS {poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid)} as a molecule is contained inside, and is in the form of a thread, string, cloth, or ribbon A dipping container 32 for impregnating and / or adhering the conductor to the base fiber 11 and the conductor solution 31 are stirred by immersing the insulating base fiber 11 made of a bundle in the conductor solution 31. A movable squeegee mechanism 34 in which the separation / contact and contact pressure of the base fiber 11 impregnated and / or attached with the conductor 12 is controlled by the control unit 40 described later, Resistance measurement unit 5 As described above, the resistance measuring device 51, the electrodes 52 and 53 that are in electrical contact with each other while running the base fiber 11 impregnated and / or attached with the conductor solution 4 and are spaced apart from each other, and the resistance A control unit 40 for driving the movable squeegee mechanism 34 based on the resistance value of the conductive fiber 10 acquired by the value measuring unit 50, and winding for pulling up the substrate fiber 11 from the solution 31 of the conductor. Part 60.

  Here, as the spool 20, a conventionally known one can be used. For example, the bobbin 20 has a roll bobbin shape or the like and can be rotated by a motor or the like to wind the base fiber 11. The thing of the structure which can be used is used. The bobbin 20 is wound with the base fiber 11 before the treatment of impregnating and / or adhering the conductor 12 is performed, and the base fiber 11 after the treatment is obtained by a winding unit 60 described below. That is, as the conductive fiber 10 is wound, the base fiber 11 wound around the spool 20 is unwound. The shape of the bobbin 20 is not limited to the above-described roll bobbin. For example, when a cloth-like or string-like base fiber is used, a winding shaft suitable for the form may be used.

  The winding unit 60 is for winding the substrate fiber 11 by winding the substrate fiber 11 in the vertical direction from the conductor solution 31 accommodated in the immersion container 32, and this is also wound. Similar to the bobbin 20, a rotatable bobbin-like shape can be used.

  In this configuration example, the amount of the conductor 12 impregnated and / or attached to the base fiber 11 is constant by making the angle at which the base fiber 11 is pulled up from the solution 31 of the conductor vertical by the winding unit 60. However, the present invention is not limited to this, and the angle for pulling up the base fiber 11 from the conductor solution 31 may be set arbitrarily.

<Conductive film deposition part>
In this configuration example, the bobbin 20 wound with the base fiber 11 is installed outside the dipping container 32. However, the present invention is not limited to this, and the bobbin 20 is dipped in the conductor solution 31 so as to be dipped. 32 may be accommodated. When the spool 20 is installed outside the immersion container 32, the amount of the conductor solution 31 impregnated in the base fiber 11 can be adjusted by controlling the winding speed of the base fiber 11 by the winding unit 60 described later. The effect is obtained. When the bobbin 20 is accommodated in the immersion container 32 so as to be immersed in the conductor solution 31, the base fiber 11 is immersed in the conductor solution 31 for a sufficient time in advance. The effect that the amount of the solution 31 of the conductor to be impregnated and / or adhered can be stabilized. In particular, as shown in FIG. 2, when the base fiber 11 is a higher-order structure such as a twisted string, a woven fabric, or a nonwoven fabric in which a plurality of fibers are twisted or knitted, the fibers and the fibers The amount of the conductor solution 4 impregnated and / or adhered during the period can be stabilized.

  The immersion container 32 is a container in which the conductive solution 31 containing PEDOT-PSS as the conductive polymer as described above is accommodated, and a conventionally known one can be used. The insulating base fiber 11 composed of a bundle of yarns, strings, cloths, or ribbons wound around the spool 20 is immersed in the conductor solution 31 so that the base fiber 11 has a conductor. The solution 31 is impregnated and / or adhered.

<Film thickness control with variable squeegee>
The amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 is determined by the movable squeegee mechanism 34 controlled by the control unit 40 described later, and the base fiber impregnated and / or attached to the conductor solution 31. 11 can be changed by the separation / contact and contact pressure. That is, when the movable squeegee mechanism 34 and the substrate fiber 11 impregnated and / or attached with the conductor solution 31 come into contact, the conductor solution 31 is moved from the substrate fiber 11 to the movable squeegee mechanism 34 according to the contact pressure. Therefore, the amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 is reduced. When the amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 changes, the thickness of the conductor 12 covering the base fiber 11 in the conductive fiber 10 changes. That is, by the movable squeegee mechanism 34 as described above, the film thickness of the conductive film can be changed, and the conductivity or electric resistance of the conductive fiber 10 can be changed.

  In this configuration example, the movable squeegee has a flat plate shape, and only one movable squeegee is provided. When providing two or more, you may make it contact with respect to the conductive fiber 10 from multiple directions. In the case of the rotor shape, the friction between the base fiber 11 and the squeegee is reduced, and the effect of facilitating the adjustment of the traveling speed of the conductive fiber 10 by the winding unit 14 is obtained.

  When contact is made with the conductive fiber 10 from multiple directions, the conductive solution 31 impregnated and / or attached to the base fiber 11 is more squeegeeed than when contact is made from only one direction. Since it can be transferred, the effect of expanding the variable range of the thickness of the conductor 12 is obtained, and further, the effect of improving the uniformity of the thickness of the conductor 12 in the cross section of the conductive fiber 10 is obtained. In this configuration example, the amount of the conductive solution 31 impregnated and / or attached to the base fiber 11 is changed by physically contacting the movable squeegee mechanism 34. However, the base fiber 11 is impregnated and / or The method of changing the amount of the adhered conductor solution 31 is not limited to this.

<Thickness control by changing the amount, temperature, concentration, and viscosity of the conductor solution>
The amount of the conductor 12 impregnated and / or attached to the base fiber 11 pulled up from the conductor solution 31 is the concentration of the conductor 12 contained in the conductor solution 31, the viscosity of the conductor solution 31, and The base fiber 11 changes depending on the time during which the base fiber 11 is immersed in the conductor solution 31, and the viscosity of the conductor solution 31 changes depending on the liquid temperature of the conductor solution 31.

  Utilizing these properties, the film thickness of the conductor formed on the conductive fiber can be controlled. FIG. 4 includes a valve 35 and a chemical tank 36 whose flow rate is controlled by the control unit 40 in order to control the film thickness of the conductor 12 impregnated and / or attached to the base fiber 11. Includes at least one chemical solution 37 for controlling the amount of the conductive solution 31 impregnated and / or attached to the base fiber 11. The chemical liquid 37 is dropped into the immersion container 32 by a control signal from the control unit 40.

  Here, for example, when a solution having a high concentration of the conductor 12 or a solvent not containing the conductor 12 is used for the chemical solution 37, the concentration of the conductor 12 contained in the solution 31 of the conductor can be changed. The solvent is usually water, but may be an aqueous liquid containing about 50% or less of a water-compatible organic solvent such as ethanol.

  When the thickener solution or the solvent is used for the chemical solution 37, the viscosity of the conductor solution 31 can be changed. The thickener is not particularly limited, and examples thereof include water-soluble polymers, carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, xanthan gum, guar gum, agar, dextrin, starch, pectin, and sodium alginate. , Gum arabic, gelatin, lignin sulfonate, polyethylene glycol, polypropylene glycol, glycerol, carboxy vinyl polymer, acrylate polymer, polyacrylate, polyacrylamide, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, polyvinyl acetate saponification , Acrylic ester polymer, isobutylmaleic acid copolymer, acrylic acid / methacrylic acid Polymers, acrylic acid / maleic acid copolymer, methyl vinyl ether / maleic anhydride copolymer, urethane resin, and acrylic resins. A thickener may be used individually by 1 type, and may be used in combination of 2 or more type.

  Further, when the conductor solution 31 is used as the chemical solution 37, the amount of the conductor solution 31 accommodated in the immersion container 32 is increased, and the conductor solution 31 in the immersion container 32 is increased. The height of the liquid level can be increased, whereby the time during which the base fiber 11 is immersed in the conductor solution 31 can be increased.

  At this time, another valve whose flow rate is controlled by a control unit 40 to be described later is provided at a position lower than the level of the solution 31 of the conductor in the immersion container 32, and the conductor of the conductor is supplied from the immersion container 32. If the solution 31 can be discharged, the time during which the base fiber 11 is immersed in the conductor solution 31 can be shortened, and the conductor solution 31 impregnated and / or attached to the base fiber 11 can be shortened. The effect of improving the controllability of the amount is obtained. These valves 35, chemical tanks 36, and chemical liquids 37 whose flow rates are controlled by the control unit 40 described later may be used alone, but a plurality of valves 35, chemical tanks 36, and chemical liquids 37 are prepared and described later. If the addition can be controlled independently by the control unit 40, the controllability of the amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 can be improved.

  Further, as shown in FIG. 5, the immersion container 32 is provided with a temperature control device 38 such as a heater or a Peltier element for controlling the liquid temperature of the conductor solution 31 by the control unit 40 to change the liquid temperature. Thus, the viscosity of the conductor solution 31 may be changed, and the amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 may be changed.

<Film thickness control by changing the winding speed of conductive fibers>
Further, the control unit 40 changes the traveling speed for pulling up the base fiber 11 from the conductor solution 31 accommodated in the immersion container 32 so that the base fiber 11 is immersed in the conductor solution 31. The amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 may be changed. In the configuration example of FIG. 6, the winding unit includes a motor 61 capable of adjusting the rotation speed, and the rotation speed of the motor 61 of the conductive fiber winding device is changed by a control signal of the control unit 40, so that the conductive fiber Is configured to change the winding speed.

  Although the conductive film forming unit 30 described above is not illustrated, after the conductive fiber 10 is pulled up from the immersion container 32 by the winding unit 60, the conductor 12 is known to the base fiber 11. It may include a polymerization part that performs polymerization and fixing by a chemical or electrochemical method and a known drying part that evaporates the solvent contained in the solution 31 of the conductor.

<Resistance measurement unit>
As shown in FIG. 2, the manufacturing apparatus 10 is provided with a resistance value measurement unit 50 for performing resistance measurement while running the conductive fiber 10 pulled up by the winding unit 60. As the resistance value measuring unit 50, a resistance measuring device by a known two-terminal method or four-terminal method can be used without any limitation.

  In this configuration example, the electrode contacting the conductive fiber 10 is an electrode 52 and an electrode 53, and the resistance value of the conductive fiber 10 between the electrodes 52 and 53 is measured using a two-terminal method. As shown in FIG. 9, four electrodes may be brought into contact with the conductive fiber 10, and the resistance value may be measured using a four-terminal method.

  In this case, the contact resistance between the electrode and the conductive fiber 10 and the resistance component of the wiring connecting the electrode and the resistance measuring device are eliminated, and the effect that only the resistance value of the conductive fiber 10 can be accurately measured is obtained. .

  In this configuration example, the electrode shape is a flat plate shape and is disposed only on one side of the conductive fiber 10, but this is not a limitation. For example, as shown in FIG. 7, the electrode shape is a roll-to-roll rotor. Alternatively, one electrode is disposed so as to contact the right side of the conductive fiber 10, the other electrode is disposed so as to contact the left side of the conductive fiber 10, and the conductive fiber 10 is sandwiched between the two electrodes. You may do it.

  In this case, since the electrode has a rotor shape, the friction between the base fiber 11 and the electrode is reduced, and the effect of facilitating adjustment of the traveling speed of the conductive fiber 10 by the winding unit 60 described later is obtained.

  Further, by arranging the electrodes so as to sandwich the conductive fibers 10, it is possible to prevent the conductive fibers 10 from being separated from the electrodes when the conductive fibers 10 are pulled up by the winding unit 60, which is caused by poor contact. It is possible to suppress the deterioration of the resistance measurement accuracy of the conductive fiber 10 to be performed.

  Moreover, as shown in FIG. 8, each electrode may have a mechanism for sandwiching the conductive fiber 10. Also in this case, when the conductive fiber 10 is pulled up by the winding unit 60, the conductive fiber 10 can be prevented from being separated from the electrode, and the resistance measurement accuracy of the conductive fiber 10 is deteriorated due to poor contact. Can be suppressed.

<Control unit>
The control unit 40 controls the film thickness of the conductive film based on the measurement result of the resistance value measurement unit 50. In the configuration in which the film thickness is controlled using the movable squeegee, the movable squeegee is driven, and the film thickness is adjusted by changing the amount, concentration, and viscosity of the conductor solution using the valve 35, the chemical solution tank 36, and the chemical solution 37. In the configuration to be controlled, the flow rate of the valve 35 is controlled, and in the configuration in which the film thickness is controlled by changing the liquid temperature of the conductor solution 31, the temperature controller 38 is controlled to control the winding speed of the base fiber 11. In the structure to change, the rotational speed of the motor 61 which can adjust the rotational speed with which the winding part 60 was equipped is changed.

  As described above, the control unit 40 determines the thickness of the conductor 12 that covers the base fiber 11 based on the measurement result of the electrical resistance value from the resistance value measurement unit 50, that is, the electrical resistance of the conductive fiber 10. Can be controlled. Specifically, when the electrical resistance value detected by the resistance value measuring unit 50 is larger than a desired electrical resistance value range, the thickness of the conductor 12 covering the base fiber 11 is increased, When the electric resistance value detected by the resistance value measuring unit 50 is smaller than the desired electric resistance value range, control is performed to reduce the thickness of the conductor 12 covering the base fiber 11. The electrical resistance of the conductive fiber 10 manufactured by a single manufacturing process can be homogenized.

  Further, in the manufacturing apparatus of the present embodiment, although not shown, in addition to the above-described components, a container-like disinfecting and cleaning unit that performs sterilization and sterilization using, for example, an ethanol or acetone bath may be provided good. Further, the disinfecting and cleaning unit may be provided with a configuration capable of removing residual monomers with a cleaning bath such as physiological saline. Furthermore, a known drying unit that dries the conductive fibers 10 may be added to the disinfecting and cleaning unit.

<When the conductor 12 is a metal such as copper or silver>
<Manufacturing equipment>
Hereinafter, the case where the conductor 12 is a metal such as copper or silver will be described with reference to FIG. 4 used when the conductor 12 includes a conductive polymer (conductive polymer).

  A conductive fiber manufacturing apparatus 10 (hereinafter also referred to as a manufacturing apparatus) 10 shown in FIG. 4 is known as a thread winding 20 around which a base fiber 11 is wound and a conductive film forming unit 30. A conductive solution 31 (plating solution) for performing electrolysis or electroplating is accommodated therein, an immersion container 32, a stirring device 33 for stirring and keeping the conductive solution 31 homogeneous, and a control described later. A valve 35 whose chemical flow rate is controlled by the unit 40 and a chemical solution tank 36 are provided. In the chemical solution tank 36, a chemical solution for controlling the thickness of the conductor 12 (plating film) formed on the surface of the base fiber 11 is provided. 37 as at least one resistance measurement unit 50. The resistance measurement device 51 and the base fiber 11 having the conductor 12 formed on the surface thereof are in electrical contact with each other while traveling, and are separated from each other. Arranged electrode 52 53, the control unit 40 for controlling the flow rate of the valve 35 based on the resistance value of the conductive fiber 10 acquired by the resistance value measuring unit 50, and the base fiber 11 is pulled up from the solution 31 of the conductor. And a take-up portion 60. In this configuration, the bobbin 20 around which the base fiber 11 is wound is installed outside the immersion container 32.

  Here, as the spool 20, a conventionally known one can be used. For example, the bobbin 20 has a roll bobbin shape or the like and can be rotated by a motor or the like to wind the base fiber 11. The thing of the structure which can be used is used. The bobbin 20 is wound with the base fiber 11 before the process of forming the film of the conductor 12 is performed, and the wound base 60 described below is used to treat the base fiber 11 after the process. That is, as the conductive fiber 10 is wound, the base fiber 11 wound around the spool 20 is unwound. The shape of the bobbin 20 is not limited to the above-described roll bobbin. For example, when a cloth-like or string-like base fiber is used, a winding shaft suitable for the form may be used.

  The winding unit 60 is for winding the substrate fiber 11 by winding the substrate fiber 11 in the vertical direction from the conductor solution 31 accommodated in the immersion container 32, and this is also wound. Similar to the bobbin 20 described above, a rotatable one having a roll bobbin shape or the like can be used.

<Conductive film deposition part>
The immersion container 32 is a container in which the conductor solution 31 (plating solution) as described above is accommodated, and a conventionally known one can be used. The insulating base fiber 11 composed of a bundle of yarns, strings, cloths, or ribbons wound around the spool 20 is dipped in a conductive solution 31 (plating solution), so that there is no known A film of the conductor 12 is formed on the base fiber 11 by electrolysis or electroplating. Examples of the electroless or electroplating usable in this embodiment include electroless copper plating, electroless nickel plating, electroless silver plating, electrolytic copper plating, electrolytic nickel plating, electrolytic silver plating, electrogold plating, and electrical Sn plating. Although it is mentioned as a suitable example, it is not particularly limited.

<Thickness control by changing the amount, temperature, concentration, and pH of the conductor solution>
The thickness of the film of the conductor 12 formed on the surface of the base fiber 11 is the concentration of the conductor 12 contained in the conductor solution 31, the pH of the conductor solution 31, and the temperature of the conductor solution 31. , And the time during which the base fiber 11 is immersed in the solution 31 of the conductor.

  Utilizing these properties, the thickness of the film of the conductor 12 formed on the surface of the base fiber 11 can be changed. For example, when a solution having a high concentration of the conductor 12 or a solvent not containing the conductor 12 is used for the chemical solution 37, the concentration of the conductor 12 contained in the solution 31 of the conductor can be changed. The solvent is usually water, but may be an aqueous liquid containing about 50% by volume or less of a water-compatible organic solvent such as ethanol.

  Further, when a pH adjuster is used for the chemical solution 37, the pH of the conductor solution 31 can be changed. The pH adjusting agent is not particularly limited, and examples thereof include basic substances such as alkali hydroxide, carbonate and ammonia, and acidic substances such as sulfuric acid and acetic acid.

  Moreover, the said conductor contained in the said immersion container 32 by using the solution 31 of the said conductor for the said chemical | medical solution 37, and dripping in the said solution 31 of the said conductor in the said immersion container 32 by the control part 40 mentioned later. When the amount of the solution 31 is increased, the liquid level of the conductor solution 31 in the immersion container 32 can be increased, whereby the time for the base fiber 11 to be immersed in the conductor solution 31 is increased. Can be lengthened.

  At this time, another valve whose flow rate is controlled by a control unit 40 to be described later is provided at a position lower than the level of the solution 31 of the conductor in the immersion container 32, and the conductor of the conductor is supplied from the immersion container 32. If the solution 31 can be discharged, the time during which the base fiber 11 is immersed in the conductor solution 31 can be shortened, and the conductor solution 31 impregnated and / or attached to the base fiber 11 can be shortened. The effect of improving the controllability of the amount is obtained.

  These valves 35, chemical tanks 36, and chemical liquids 37 whose flow rates are controlled by the control unit 40 described later may be used alone, but a plurality of valves 35, chemical tanks 36, and chemical liquids 37 are prepared and described later. If the addition can be controlled independently by the control unit 40, the controllability of the amount of the conductor solution 31 impregnated and / or attached to the base fiber 11 can be improved.

  Further, as shown in FIG. 5, the immersion container 32 is provided with a temperature control device 38 such as a heater or a Peltier element for controlling the liquid temperature of the solution 31 of the conductor by a control unit 40 which will be described later. The thickness of the film of the conductor 12 formed on the surface of the base fiber 11 may be changed by changing

<Film thickness control by changing the winding speed of conductive fibers>
Further, as shown in FIG. 6, the base fiber 11 is changed by changing the traveling speed of pulling up the base fiber 11 from the solution 31 of the conductor contained in the immersion container 32 by the control unit 40 described later. The time of immersion in the conductor solution 31 may be changed to change the thickness of the film of the conductor 12 formed on the surface of the base fiber 11.

  Although the conductive film forming unit 30 described above is not illustrated, a known refining step, plasma treatment step, alkali treatment step, cation treatment step, before the base fiber 11 is immersed in the immersion container 32, It may include a pretreatment part that performs a catalyst soaking process, an accelerator treatment process, a heat treatment process, a water washing process, and a drying process, and is publicly known after the conductive fiber 10 is pulled up from the soaking container 32 by the winding part 60. The post-processing part which performs the water washing process of this and a drying process may be included.

<Resistance measurement unit>
The configuration of the resistance value measuring unit is the same as that in the case where the above-described conductive polymer is used, and thus description thereof is omitted.

<Control unit>
The control unit 40 controls the film thickness of the conductive film based on the measurement result of the resistance value measurement unit 50. In the configuration in which the film thickness is controlled by changing the amount, concentration and viscosity of the conductor solution using the valve 35, the chemical solution tank 36 and the chemical solution 37, the flow rate of the valve 35 is controlled to In the configuration in which the film temperature is controlled by changing the liquid temperature, the temperature control device 38 is controlled, and in the configuration in which the winding speed of the base fiber 11 is changed, the rotation speed provided in the winding unit 60 can be adjusted. The rotational speed of the motor 61 is changed.

<Manufacturing method>
Below, the procedure is demonstrated about the method of manufacturing the electroconductive fiber 10 using the above-mentioned manufacturing apparatus, referring FIG. The manufacturing method of the conductive fiber 10 described in the present embodiment includes the following three steps, and the steps (1) to (3) are performed while adjusting the atmospheric humidity.

(1) Conductive film-forming step (S1): A film made of the conductor 12 on the base fiber 11 by immersing the insulating base fiber 11 made of a thread-like fiber bundle in the conductor solution 31. Forming a conductive fiber to form a conductive fiber.
(2) Resistance value measuring step (S2): A step of measuring an electrical resistance value with an electrode brought into contact with the conductive fiber while conveying the conductive fiber.
(3) Film thickness control step (S3, S4): The resistance value of the conductive fiber 10 measured in the resistance value measurement step is compared with the desired resistance value, and the desired resistance value is obtained. If the desired resistance value is not obtained, the conductive film formation conditions (amount of conductive solution, temperature, etc.) are changed, and the conductive film in the conductive film formation step is changed. Changing the thickness of the film.
Further, in the case of changing the winding speed of the base fiber 11, in this film thickness control step, the conductor is changed by changing the rotation speed of the motor 61 that can adjust the rotation speed provided in the winding section 60. Change the film thickness.

  The method for producing a conductive fiber according to the present invention includes (2) a step of measuring an electric resistance value of the produced conductive fiber and (3) a measured electric resistance value as compared with the conventional method. Steps for controlling the film thickness are added to the film, and by adding these steps, it is possible to improve the homogeneity of the electrical resistance of the conductive fibers manufactured in a single manufacturing process.

<Conductive film forming step (S1)>
In the conductive film forming step (S1), as described above, the base fiber 11 is immersed in the conductor solution 31 to form a film made of the conductor 12 on the base fiber 11.

  Specifically, for example, a conductor solution 31 is accommodated in a dipping container 32 as shown in FIG. 3, and the base fiber (fiber bundle) 11 is immersed in this solution. Thereby, since the film | membrane which consists of the conductor 12 which has electroconductivity is formed into the base fiber 11, the base fiber 11 has electroconductivity.

  In the case of preparing a conductive solution as described above, for example, when a conductive polymer is used as the conductive material, a commercially available PEDOT-PSS solution (such as Heraeus CLEVISOP) is further added as necessary. Etc. can be added.

  That is, a method of adjusting a mixed solution in which an additive is mixed in a conductive solution containing PEDOT-PSS and simultaneously applying or immersing the conductive polymer and the additive to the base fiber 11 can be applied. . As an example of such a liquid mixture, the concentration of conductive polymer such as PEDOT-PSS is 0.1 to 50 (V / V)%, and the additive such as glycerol is 0.1 to 50 (V / V)%. The aqueous solution contained in is mentioned. Moreover, the density | concentration of the additive in the solution of a conductor is not restrict | limited in particular, For example, high electroconductivity can be acquired by setting it as the range of 0.1-50 wt%. At this time, a known chemical or electrochemical polymerization step may be included.

  In addition, when a metal formed by a known electroless or electroplating method is used as the conductor, a commercially available electroless copper plating solution, electroless nickel plating solution, electroless silver plating solution, electrolytic copper plating solution, electric Nickel plating solution, electro silver plating solution, electro gold plating solution, electro Sn plating solution and the like can be used without any limitation. At this time, before the base fiber 11 is immersed in the immersion container 32, a refining step, a plasma treatment step, an alkali treatment step, a cation treatment step, a catalyst immersion step, an accelerator treatment step, a heat treatment step, a water washing step, a drying step It may include a pre-processing unit that performs a process, and may include a post-processing unit that performs a known water washing process and a drying process after the conductive fiber 10 is pulled up from the immersion container 32 by the winding unit 60. .

<Resistance value measuring step (S2)>
Next, in the resistance value measurement step (S2), an electrode is brought into contact with the conductive fiber 10, and the electrical resistance of the conductive fiber 10 manufactured by the two-terminal method or the four-terminal method is measured. Specifically, when the two-terminal method is used, for example, an electrode pair made of a conductive metal material or carbon material and a commercially available electrical resistance measuring machine are connected by wiring, and the resistance value of the conductive fiber 10 between the electrode pair is determined. Will be acquired continuously.

  In FIG. 11, when the PEDOT-PSS solution is impregnated into the polymer fiber, the resistance value of the conductive fiber 10 when the conductive fiber 10 is run at a constant speed with respect to the electrode with an electrode interval of 2 cm. The result of having measured the time change of is shown. The horizontal axis represents time, and the vertical axis represents the relative resistance value of the conductive fiber 10 with respect to a desired resistance value.

<Film thickness control step (S3, S4)>
Next, in the film thickness control step (S3, S4), the resistance value of the conductive fiber 10 obtained in the above resistance value measurement step is compared with a desired resistance value, and a desired resistance value is obtained. If the desired resistance value is not obtained, the conductive film deposition conditions (amount of conductive solution, temperature, etc.) are changed, and the conductive film in the conductive film deposition step is changed. The film thickness is controlled.

  For example, when a means for changing the film thickness by dropping the liquid 37 shown in FIG. 4 is used, and a solution having a high concentration of the conductor 12 and a diluting solvent (water) are used as the liquid 37, the resistance value fluctuation as shown in FIG. In the region A where the measured resistance value is larger than the desired resistance value, a solution having a high concentration of the conductor 12 is dropped and the measured resistance value is smaller than the desired resistance value. In region B, control is performed to drop the diluting solvent (water).

  Further, in the case of a configuration in which the winding speed of the base fiber 11 is changed, in the region A where the measured resistance value is larger than the desired resistance value, the winding speed is made slower and measured than the desired resistance value. In the region B where the resistance value is small, the rotational speed of the motor is controlled so as to increase the winding speed. By controlling in this way, the conductive fiber 10 can be manufactured while maintaining the uniformity of electrical resistance over a single manufacturing process.

  As described above, according to the conductive fiber manufacturing method and apparatus according to the embodiment of the present invention, the conductive film forming means capable of changing the film thickness of the conductive film, and the electrical resistance of the conductive fiber. Since the value measuring means and the film thickness control means of the conductive film are provided based on the measured electric resistance value, the conductive fiber 10 is manufactured while maintaining the uniformity of the electric resistance over one manufacturing process. It becomes possible to do.

  INDUSTRIAL APPLICATION This invention can be utilized for manufacture of the conductive fiber raw material utilized for a bioelectrode, a biointerface, antistatic clothing, etc.

  DESCRIPTION OF SYMBOLS 10 ... Conductive fiber, 11 ... Base fiber, 12 ... Conductor, 20 ... Thread winding, 30 ... Conductive film-forming part, 31 ... Conductor solution, 32 ... Dipping container, 33 ... Stirrer 34 ... Movable squeegee 35 ... Valve, 36 ... Chemical solution tank, 37 ... Chemical solution, 38 ... Temperature control device, 40 ... Control unit, 50 ... Resistance value measurement unit, 51 ... Resistance measurement device, 52, 52-1, 52-2, 53, 53-1, 53-2 ... Electrode, 60 ... Winding part, 61 ... Motor.

Claims (5)

A conductive film forming step of forming a conductive fiber by forming a conductive film on an insulating base fiber by immersing in a predetermined conductor solution containing a conductive substance;
The resistance value measuring step of measuring the electrical resistance value of the conductive fiber with at least one pair of electrodes brought into contact with the conductive fiber while transporting the conductive fiber in the longitudinal direction and the resistance value measuring step A film thickness control step for controlling the film thickness of the conductive film based on the electrical resistance value of the conductive fiber ,
The conductor solution is a solution containing a conductor polymer as a conductive substance,
In the film thickness control step,
By contacting a plurality of movable squeegees having a roll-to-roll rotor shape with respect to the conductive fibers from a plurality of directions, the conductive coating film Control film thickness
The manufacturing method of the conductive fiber characterized by these . In the film thickness control step,
If the electrical resistance value of the conductive fiber measured in the resistance value measurement step is greater than a predetermined range of electrical resistance value, increase the film thickness of the conductive film,
The film thickness of the said conductive film is made thin when the electrical resistance value of the said conductive fiber measured at the said resistance value measurement step is smaller than the range of the predetermined electrical resistance value. The manufacturing method of conductive fiber. An immersion container containing a predetermined conductor solution containing a conductive substance;
A conductive film forming means for immersing an insulating base fiber in the immersion container and forming a conductive film by forming a conductive film on the base fiber;
A resistance value measuring means for measuring the electrical resistance value of the conductive fiber with at least one set of electrodes brought into contact with the conductive fiber while conveying the conductive fiber in the longitudinal direction;
Film thickness control means for controlling the film thickness of the conductive film based on the electrical resistance value of the conductive fiber measured by the resistance value measuring means;
A conductive fiber winding means for pulling up the conductive fiber from the immersion container and winding the conveyed conductive fiber ;
The conductor solution is a solution containing a conductor polymer as a conductive substance,
The conductive film forming means is a movable squeegee capable of contacting or separating from the conductive fiber, has a roll-to-roll rotor shape, and contacts the conductive fiber from a plurality of directions. Have several movable squeegees possible,
Changing at least one of the distance between the movable squeegee and the conductive fiber and the contact pressure in accordance with a control signal from the film thickness control means.
A conductive fiber manufacturing apparatus characterized by the above . The said conductive fiber winding means changes the winding speed of the said conductive fiber according to the control signal from the said film thickness control means. The manufacturing apparatus of the conductive fiber of Claim 3 characterized by the above-mentioned. The resistance value measuring means has two sets of the electrodes arranged at positions spaced apart from each other in the longitudinal direction of the conductive fiber, and measures the electric resistance value of the conductive fiber using the two sets of electrodes. The manufacturing apparatus of the conductive fiber of Claim 3 or 4 characterized by these.

Images