JP2007177363A - Fiber structure comprising electroconductive polymer and method for producing the same, and three-dimensional knit-type actuator and component for vehicle using the fiber structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber structure having actuating functions. <P>SOLUTION: The fiber structure carrying out the actuation by converting an electric energy to a mechanical energy is obtained by arranging en electroconductive polymer fiber 3 having an electrical conductivity within the range of 0.5-500 S/cm so that the major axis direction of the fiber may be arranged between a pair of base fabrics 2 arranged at a constant interval, and/or by forming a pair of the base fabrics into three-dimensional knit shapes having the electroconductive polymer fiber 3 interknitted therewith. The fiber structure further has terminals per unit for driving the fiber structure, installed therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fiber structure, an actuator including the fiber structure, and a vehicle component using the actuator. More specifically, the present invention relates to a knitted device having conductivity as a means for changing the thickness of, for example, a cushion, and the knitted fabric that is actuated by converting electrical energy into mechanical energy.

  Conventionally, as a mechanical drive source generally used, there are a motor, a hydraulic / pneumatic actuator, and the like. For example, Patent Document 1 describes an example of a pneumatic actuator. However, since other methods are generally composed of a structure (device) using a metal material, a large mass and space are required. Many power sources require a lot of energy. In view of these points, actuators using organic materials that are obtained in a lightweight and space-saving manner have been developed. For example, films or fibers made of conductive polymer materials described in Patent Document 2 are electrochemically redox. An attempt is made to apply expansion and contraction of an organic material to the above problem by using a reaction. However, a specific example of the shape to be obtained is a film shape and only an example of the stretching direction and the longitudinal direction is shown.

In addition, an actuator based on a combination of a gel and a solvent has been developed. For example, in the example of Patent Document 3, in order to drive the gel actuator that was driven in the solvent in the air, the solvent tank must be held as a system. Therefore, there is a possibility that the electrolyte leakage and the performance degradation due to electrolysis may occur.
Japanese Patent Application Laid-Open No. 2004-29999 Japanese Patent No. 3131180 JP 2004-188523 A

  In the present invention, by using conductive polymer fibers in view of the above-described problems, other auxiliary devices necessary for conventional actuators, mass, and space are not required, and a stretching function can be imparted to itself. The object is to obtain a fiber structure that can be actuated while saving space.

  The present invention relates to a fiber structure characterized by connecting a pair of base fabrics having a constant interval with conductive polymer fibers.

  The present invention also relates to a three-dimensional knitted actuator that uses the fiber structure.

  Furthermore, the present invention relates to a vehicle component using the three-dimensional knitted actuator.

  According to the fiber structure of the present invention, it is characterized in that a pair of base fabrics having a constant interval is connected by conductive polymer fibers, and therefore it is possible to provide an actuate function.

  According to the solid knitted actuator of the present invention, an efficient actuate function can be provided.

  According to the vehicle component of the present invention, an efficient actuate function can be provided.

  The fiber structure of the present invention is characterized in that a pair of base fabrics having a constant interval are connected by conductive polymer fibers. Here, the base fabric or textile includes woven fabric, knitted fabric, fabric, and the like.

  A general knitted fabric is a knitted fabric in which one or several yarns form a loop, and a new loop is formed by hooking the next yarn into the loop. In general, a knitted fabric knitted by a flat knitting machine is called a knitted product (FIG. 1: flat knitting, 2: rubber knitting), and a knitted fabric knitted by a circular knitting machine or a warp knitting machine is called a jersey.

  In the present invention, this knitted fabric is three-dimensionally formed between the upper and lower base fabrics (FIGS. 3 and 4: the lower figures are in a contracted state), thereby providing an adjustment function in the thickness direction. Since the obtained knitted fabric is three-dimensional, it is excellent in cushioning properties, durability, breathability and washability. Examples of commercially available three-dimensional knitted fabrics include Fusion manufactured by Asahi Kasei Fibers.

  The shape of the base fabric is not particularly limited and can be a shape suitable for the application, and examples thereof include a quadrangle and a square. Hereinafter, a quadrangle will be described as a representative example.

  In the present invention, a single thread may not necessarily be connected between the upper and lower base fabrics (FIG. 5: a diagram in which both ends of the yarn are cut, FIG. 6: a diagram in which the lower base fabric portion of the yarn is cut). Of course, by connecting by one, the whole fiber structure can also be actuated by installing electrodes at both ends thereof. Further, for example, at least one conductive polymer fiber is passed through the upper base fabric from the bottom to the top, further penetrated from the top to the bottom, and then the bottom base fabric is penetrated from the top to the bottom. It is preferable to connect from one end of the quadrangle to the other opposite end. This is because by installing electrodes at both ends of the fiber, the actuation can be easily controlled when the fiber structure is actuated.

  In the case where one piece is not connected, the yarns hanging between the upper and lower sides are fixed between the upper and lower base fabrics by means such as adhesion and fusion. At that time, the length of the yarn is substantially the same as that between the base fabrics. Here, “substantially” means the same thickness as that between the base fabrics, or when the yarn penetrates the base fabric, it is necessary to add the thickness of the base fabric. It means that the thing which added thickness is included. In this structure, for example, an adhesive is applied to both ends of a plurality of yarns having a predetermined length, and the portion where the adhesive is applied is adhered to the base fabric, or the base fabrics at regular intervals are connected with the yarn as described above. After that, it can be manufactured by cutting the yarn protruding outside from the upper and lower base fabrics and bonding the yarn. In that case, it is preferable that the base fabric from which the yarn is cut is a conductive woven or non-woven fabric in terms of imparting conductivity. In addition, the woven or non-woven fabric having conductivity imparts conductivity in place of the yarn, and imparts conductivity only to the corresponding portion, and it may not be conductive to other portions. This is preferable from the viewpoint of controlling the address. This is achieved by using a non-conductive material and bonding a conductive woven fabric or the like to a necessary portion. Of course, the process of cutting the yarn may be performed only on one base fabric.

  In addition, a single yarn to be used itself forms a twisted yarn composed of a plurality of yarns, and the amount of actuate can be designed according to the density of the conductive polymer fiber in the twisted yarn.

  Moreover, it is not always necessary to use the conductive polymer fiber as a whole, and the installation density (number of fibers) can be designed as necessary.

  In this case, the density of the conductive fiber per unit area is the ratio of the cross-sectional area of the fiber to the unit area, and is preferably in the range of about 2 to 80%. By setting it in this range, the actuating performance is sufficiently exhibited, and the merit of knitting can be obtained, which is almost equivalent to the case where the film-like material is changed in the thickness direction.

  In addition, the above range is a range in the case where conductive polymer fibers are used for all warp yarns, but it is also possible to replace some of the yarns hung in the height direction with general fibers. Also in this case, the amount of fibers per unit area may be in the above range, but the ratio of general fibers to conductive polymer fibers in the yarn used in the height direction is 50% or more, all Is preferably set within a range where the conductive polymer fiber is replaced. Although the amount of actuate tends to decrease as the amount of general fibers increases, it can be said that a sufficient amount of actuate can be obtained within this range. For these general fibers, fibers made of general-purpose resins such as polyamides such as nylon 6 and nylon 66, polyethylene terephthalate, polyethylene terephthalate containing a copolymer component, polybutylene terephthalate and polyacrylonitrile may be used alone or in combination. From the viewpoint of cost and practicality, it is preferable.

  Further, the shape of the upper and lower base fabrics is not particularly problematic as long as they are cloth-like or plate-like, but it is electrically conductive to use the woven fabric, nonwoven fabric, knitted fabric or the like made of the above-mentioned commonly used fibers as the base fabric. This is also preferable from the viewpoint of fixing the conductive polymer fiber and the meaning of following the expansion and contraction during actuation.

  As shown in FIGS. 7 to 9, how to hang the fibers between the upper and lower base fabrics is suspended in a vertical direction (FIG. 7), in a crossed state (FIG. 8), or in a loop. There are variations (Fig. 9) and combinations of these.

  The fiber structure using the conductive polymer fiber having the above structure is hereinafter referred to as a fiber structure in the present invention.

  As an embodiment of the fiber structure of the present invention, it is also preferable to install and / or braid conductive polymer fibers so that the major axis direction of the fibers is aligned between the upper surface and the lower surface.

  When the major axis direction of the conductive polymer fibers is aligned, the state as shown in FIGS. 7 to 9 is shown. By adopting such a form, the current flows from the end of the fiber to all the conductive polymer fibers. Etc. can be applied. This is a particularly effective configuration when the fiber structure is moved collectively.

  Moreover, what is shown to FIG. 10A can also be included in a fiber structure. In FIG. 9, the loop is formed along the traveling direction, whereas in FIG. 10, the loop is formed in a direction perpendicular to the traveling direction of the loop. FIG. 10B is a drawing showing a three-dimensional loop in the AA′B′B cross section of FIG. 10A. FIG. 10C is a diagram illustrating another example of the three-dimensional loop in the section AA′B′B in FIG. 10A. In FIG. 10C, the loops are formed more densely as the loops overlap.

  7 to 10, at least one conductive polymer fiber is passed through, for example, the upper base fabric from the bottom to the top, and further from the top to the bottom, and then the lower base fabric is penetrated from the top to the bottom, Further, it is preferable to repeat from the bottom to the top and connect from one end of the quadrangle to the other opposite end. That is, using a single conductive polymer fiber, the upper and lower base fabrics are knitted from one end of the rectangular base fabric to the other opposite end. By repeatedly using a plurality of the fibers, a fiber structure is obtained (FIG. 7). Or, using one of the fibers, weaving the upper and lower base fabrics from one end of the square base fabric to the other opposite end, and using the other fibers, the fibers and the fibers cross between the upper and lower base fabrics. Knit into. By repeatedly using a plurality of the fibers, a fiber structure is obtained (FIG. 8). Further, using one of the fibers, a loop is applied in the fiber traveling direction from one end of the rectangular base fabric to the other opposite end (FIG. 9), or the loop is perpendicular to the fiber traveling direction. Hang (Fig. 10A) to knit the upper and lower base fabrics. A fiber structure is obtained by repeating using a plurality of the fibers. Of course, the loop may be between the same direction as the fiber travel method and a vertical method. Further, the conductive polymer fiber may be bent by just before the base fabric without penetrating the base fabric, and the fiber and the base fabric may be bonded or fused. This method can be carried out more economically.

  At this time, the ratio of the fibers per unit area of the base fabric is usually in the range of 1 to 80%, and preferably in the range of 10 to 50%. It is because a fiber structure can be obtained by setting to this range. Moreover, the ratio for which this fiber accounts here says the ratio for which the sum total of fiber cross-sectional area accounts for a base fabric area.

  In addition, when the conductive polymer fibers are arranged in the major axis direction, there is a range where the actuator is easily actuated depending on the distance between the upper and lower base fabrics. By making the distance between the upper and lower base fabrics, that is, the constant interval, normally about 5 mm to about 50 mm, the actuate function can be imparted while maintaining the thickness.

  In the present invention, the term “fiber” refers to a fiber that is spun by a method such as melt spinning, wet spinning, electrospinning, or slitting such as film cutting. The diameter and width of the fibers at this time are about several μm to several hundreds of μm per one. When forming a woven fabric or knitted fabric, weaving, ease of knitting, weaving, woven fabric after knitting, knitted fabric It is preferable because of its softness and ease of handling as a fabric. In the case where the thickness is several millimeters, a tube-like one having a function as in the present invention can be seen, but these principles and products cannot be used for knitted fabrics, woven fabrics and the like. With the fiber structure of the present invention, an actuation function can be imparted to knitted fabrics, woven fabrics, and the like that have been difficult in the past.

  By making these fibers into bundles of tens to thousands (bundle shape, FIG. 11), handling as fibers becomes easy. At this time, twisting may be applied.

  In the present invention, the knitted fabric is formed using these fibers and / or bundle-like fibers.

  The conductive polymer used in the present invention is not particularly limited as long as it is a polymer exhibiting conductivity. For example, acetylene type, hetero 5-membered ring system (monomer, pyrrole, 3-methyl 3-alkylpyrrole such as pyrrole, 3-ethylpyrrole and 3-dodecylpyrrole; 3,4-dialkylpyrrole such as 3,4-dimethylpyrrole and 3-methyl-4-dodecylpyrrole; N-methylpyrrole, N-dodecyl N-alkylpyrrole such as pyrrole; N-alkyl-3-alkylpyrrole such as N-methyl-3-methylpyrrole and N-ethyl-3-dodecylpyrrole; pyrrole obtained by polymerizing 3-carboxypyrrole, etc. Polymer, thiophene polymer, isothianaphthene polymer, etc.), phenylene and aniline conductive polymers (Fig. 12: acetylene-based conductive polymer, Fig. 13: pyrrole-based conductive polymer, Fig. 14: thiophene-based conductive polymer, Fig. 15: phenylene-based conductive polymer, FIG. 16: Aniline-based conductive polymer).

  Furthermore, in conducting polymers, dopants have a dramatic effect on their conductivity. The dopants used here include halide ions such as chloride ions and bromide ions, perchlorate ions, tetrafluoroborate ions, hexafluoroarsenate ions, sulfate ions, nitrate ions, thiocyanate ions, and hexafluoride ions. Silicate ion, phosphate ion, phenyl phosphate ion, phosphate ion such as hexafluorophosphate ion, trifluoroacetate ion, tosylate ion, ethylbenzenesulfonate ion, alkylbenzenesulfonate ion such as dodecylbenzenesulfonate ion, methylsulfone Polymer ions such as acid ions, alkylsulfonic acid ions such as ethylsulfonic acid ions, polyacrylic acid ions, polyvinylsulfonic acid ions, polystyrenesulfonic acid ions, poly (2-acrylamido-2-methylpropanesulfonic acid) ions Of down, at least one ion is used. The amount of dopant added is not particularly limited as long as it has an effect on conductivity, but is usually 3 to 50 parts by mass, preferably 10 to 30 parts by mass with respect to 100 parts by mass of the conductive polymer. is there.

  In addition, the behavior of this material in response to electrical stimulation is known by an electrical deformation method of a material using a pyrrole polymer that responds to stimulation described in JP-A-11-159443. By making this into a fiber and forming a three-dimensional knitted fabric as in the present invention, it is possible to cause deformation of the knitted fabric, change in hardness, touch feeling, or the like.

  The conductivity for obtaining the actuate function is preferably in the range of about 0.5 to 500 S / cm from the viewpoint of sensing performance and actuate performance. A more preferable range is about 1 to 300 S / cm, whereby the sensing and actuate functions can be expressed more efficiently.

  The conductivity referred to here is the reciprocal of the resistivity determined in accordance with JIS K 7194 (Resistivity test method by the 4-probe method of conductive plastic).

  Among the conductive polymers exhibiting these performances, polypyrrole, and / or PEDOT (poly3,4-ethylenedioxythiophene) / PSS (poly-4-styrenesulfonate), and / or polyaniline, and / or PPV (polyparaffin) It is more preferable to use a fiber containing any of (phenylene vinylene). Among them, materials that can be easily obtained as fibers include PEDOT / PSS (Bayer, Baytron P (registered)) in which PSS is doped with PEDOT, a thiophene conductive polymer, phenylene PPV, pyrrole polypyrrole, etc. Is mentioned.

  Among these conductive materials, these materials can be easily made into fibers by a method such as wet spinning or electrospinning, and are preferable as materials satisfying the above-described conductivity.

  For example, thiophene, pyrrole, and aniline can be manufactured by wet spinning. For example, an aqueous dispersion of PEDOT / PSS (Bayer Baytron P (registered trademark)) is extruded from acetone into a cylinder (FIG. 17). Thus, the conductive polymer fiber can be easily obtained.

  FIG. 17 is a schematic view of a wet spinning apparatus according to the present invention. In the wet spinning apparatus 20 shown in FIG. 17, for example, an aqueous dispersion of PEDOT / PSS is extruded from a wet spinning base 21, and a fiber precursor 10 extruded through a base needle 28 is filled with a solvent such as acetone. The wet spinning solvent tank 22 is passed, passed through a fiber feeder 23, and wound up by a fiber winder 24 to obtain conductive polymer fibers.

  On the other hand, in the phenylene system, polyparaphenylene, polyparaphenylene vinylene, polyfluorene, etc. are conductive types using π bonds on the benzene ring and π bonds on the straight chain connected to it, and these conductive polymers are The fiber can be formed by electrospinning (FIG. 18).

  FIG. 18 is a schematic view of an electrospinning apparatus according to the present invention. In the electrospinning device 30 shown in FIG. 18, an electric wire is provided between the needle tip of the cylinder needle 32 of the cylinder 31 and the electrode 33 placed on the insulating material (base) 34 installed below the cylinder 31. A voltage application device 35 is provided via 36. For example, a stock solution for spinning is prepared by mixing a phenylene-based material such as polyparaphenylene and an alcohol such as methanol. While applying a voltage, the prepared stock solution is pushed out from the tip of the cylinder needle 32 of the cylinder 31 toward the electrode 33. By this method, the fiber precursor 10 is deposited on the electrode 33. The obtained fiber precursor is dried by a known method such as vacuum drying to obtain a fiber.

  By adopting such a process, it becomes possible to easily produce conductive polymer fibers forming a knitted fabric.

  Next, it is also preferable that these fiber structures are covered with another polymer. By coating after forming the fiber structure, the strength and durability of the fiber structure can be improved, and stable sensing and actuating behavior can be brought about. The coating amount can be within a range that does not impair the above performance, but is preferably about 10 to 80%, more preferably about 30 to 50% with respect to the cross-sectional area of the conductive polymer fiber.

  As another means for obtaining the above performance, a core-sheath type in which conductive polymer fibers are combined with other polymers at the stage of obtaining fibers, or before weaving or knitting after fiber formation, side-by-side A cross-sectional shape of a mold or a sea-island type is also preferable.

  In general fiber materials, those made of a uniform material as shown in FIG. 19, those having a core-sheath structure (FIG. 20), and those having a side-by-side structure (FIG. 21). ), A sea-island (multi-core) structure (FIG. 22), a deformed cross-sectional shape having a non-circular cross section (FIGS. 23 and 24), a hollow structure (FIG. 25), and the like. These are used as one means for functionalizing the fiber, for example, to change the texture of the fiber itself in a natural shape, to increase the surface area of the fiber, and to reduce weight and heat insulation.

  The intention of the present invention is not only to devise to change the static characteristics of these fibers, but also to combine the mechanics of the fiber and the contrivances of the material with the aim of actuating functions in various directions. Therefore, the above function is realized.

  In addition, in order to obtain an actuate function in a desired direction, the deformation direction is limited by coating or laminating other materials on the surface layer. By laminating, a surface in which the movement is hindered is generated, and as a result, when viewed macroscopically as a fiber shape, it has actuate directivity in a certain direction.

  By previously combining a part or all of the surface layer with another polymer to form such a shape, the contact portion can be controlled and the strength of the fiber can be increased.

  The term “part of the surface layer” as used herein refers to the entire surface of the conductive polymer in the formation of a laminate made of other materials on the surface of the fiber body having these conductive polymers as the core. A state that does not cover.

  For example, the cross-sectional shape at the time of lamination is as shown in FIG. Other than the circular shape, the irregular cross-sectional shape may be a flat cross-section, a hollow cross-section, a fiber form such as a triangle or a Y shape, or a fiber form having fine irregularities or streaks on the fiber surface.

  In the cross-sectional shape shown in this figure, the material differs depending on the type of hatching, but this function can be manifested by combining two types of materials regardless of the size of the area.

  In addition, it is also preferable that the laminated structure is a side-by-side type.

  The term “side-by-side” as used herein refers to a structure in which the conductive functional portion and the surface layer portion serving as the constraining layer are approximately 50% of the cross-sectional area. In particular, by using this amount, an actuation function can be obtained, and the strength of the fiber itself as a fiber having this function can be improved.

  For the lamination, for example, an apparatus shown in FIG. 27 provided with a portion for applying a laminated resin layer continuously in the wet spinning process is used. In this application step, the conductive polymer fiber used in the present invention can be obtained by applying a layer of a material type different from that of the conductive portion.

  FIG. 27 is a schematic diagram of an apparatus provided with a coating process in the wet spinning apparatus according to the present invention. In the wet spinning apparatus 20 shown in FIG. 27, the spinning solution is extruded from the wet spinning base 21 and the fiber precursor 10 extruded through the base needle 28 is converted into a wet spinning solvent tank 22 containing a solvent such as acetone. Pass through. After passing through the solvent tank 22, the precursor 10 passes through a fiber feeder 23, and after applying and drying a resin material or the like with a coating / drying device 25, a fiber 11 is obtained and a fiber winder 24 is used. It is wound up.

  On the other hand, in addition to these side-by-side types, a structure in which a part of the inner diameter cross section of the fiber penetrates a material different from the above two types can be used as the conductive polymer fiber.

  As shown in FIGS. 28 to 30, the part of the inner diameter cross section of the fiber referred to here means that when the fiber cross section is viewed, either the material that becomes the driving portion or the material that does not drive the entire surface. The component which is the shape which is covering and the surface which does not cover the surface is shown being contained in the core part of a cross section.

  By adopting this shape, when a conductive component is used for the core, the durability of the surface of the fiber itself depends on other materials, and generally improves when using a general resin material. To do.

  In particular, when a conductive component is used for the sheath portion, a conductive portion appears on the surface, and when using it in a conductive state, it can be obtained in a state where contact of the contact is easily obtained.

  Among these structures, the core-sheath type is preferable. Here, the core-sheath type means that the ratio of the core-sheath area to the cross-sectional area is close to 50%, and this also exhibits the best function when considering the balance of fiber strength and drive. can do.

  Here, the number of cores is not limited to one, and the same effect can be obtained with a multi-core (sea-island structure).

  These core-sheath type conductive polymer fibers are coated with, for example, a resin component that is not a conductive polymer as a sheath component in a continuous process on the conductive fibers in the core obtained by wet spinning or electric field polymerization. Manufactured by applying material.

  The process is as shown in FIG. 31, and the amount of resin remaining on the surface can be adjusted by adjusting the time and temperature of the drying process, so that different cross-sectional shapes can be obtained depending on various drying conditions. Can do.

  FIG. 31 is a schematic view of an apparatus provided with a coating process in the wet spinning apparatus according to the present invention. In the wet spinning apparatus 20 shown in FIG. 31, the spinning raw solution is extruded from the wet spinning die 21 and the fiber precursor 10 is passed through a wet spinning solvent tank 22 containing a solvent such as acetone. After passing through the solvent tank 22, the precursor 10 is sent through a fiber feeder 23 to a coating tank 26 containing a polyester emulsion and the like. The fiber soaked with the emulsion is sent to the drying device 27 by the fiber feeder 23 and dried, and then the fiber 11 is obtained and wound by the fiber winder 24.

  As another method, a core-sheath fiber can be produced by pulling up from a single liquid phase by using a core-sheath discharge nozzle in the case of wet spinning.

  It is preferable to use a resin material as a material constituting part or all of the surface layer of these conductive polymer fibers and a part of the inner diameter cross section, and that the resin material is a thermoplastic resin.

  This is because a polymer material is mainly used as a conductive component, and by combining it with a similar material, it can be made into a fiber shape without hindering the movement of the conductive polymer as much as possible. It becomes possible.

  Furthermore, by using this as a thermoplastic resin, it is possible to easily use it in a desired shape when commercialized.

  The resin used for these coatings, laminates, core sheaths, and sea-island components may be polyamides such as nylon 6 and nylon 66, polyethylene terephthalate, polyethylene terephthalate containing a copolymer component, polybutylene terephthalate, polyacrylonitrile, etc. alone or in combination. It can also be used.

  In addition to these, it is also preferable to be made of an elastomer. By using an elastomer, deformation and recovery are not inhibited more than the above polymer.

  As a suitable elastomer, it is more preferable to use polysiloxanes in order to obtain a large deformation. In addition, polymethacrylates, polychloroacrylates or polystyrene derivatives that exist in the glassy state at room temperature, and preferred elastomers that exist in the liquid crystal state at room temperature include polyacrylates, polysiloxanes or polyphosphazenes, and copolymers comprising these. Is mentioned. Preferred mesogenic groups include those containing alkyl, alkoxy and oxaalkyl groups having, for example, up to 15 chain members on the long axis of the mesogenic unit.

  Elastomers are synthesized by, for example, simple random copolymerization or random polymer-like addition reaction with a multifunctional crosslinker molecule in the same manner as usual polymer synthesis.

  In addition, it is also preferable that other polymers used for coating, lamination, core sheath, and sea-island components form a porous body.

  By using a porous material, a mechanism of electrical stimulation deformation of a conductive polymer as shown in an electrical deformation method of a material using a pyrrole polymer that responds to stimulation described in JP-A-11-159443 However, the adsorption / desorption of water molecules can be facilitated, and the response speed to the amount of actuate can be improved.

  The porosity of the porous body formed here is preferably as large as possible, but is preferably about 30 to 70% from the standpoint of actually increasing the response speed and increasing the strength and durability.

  As another embodiment, the three-dimensional knitted actuator using the fiber structure of the present invention preferably uses conductive woven fabric and / or non-woven fabric on the upper and lower surfaces.

  By using the upper and lower base fabrics having conductivity in advance, it is possible to energize even when the conductive polymer fibers are not connected as a single knitted fabric.

  In the three-dimensional knitted fabric type actuator according to the present invention which is one of the embodiments, the conductive woven fabric and / or the non-woven fabric is preferably made of carbon-mixed fibers, carbon fibers or carbon nanotubes.

  As the fibrous body having conductivity, it is more preferable to use a fiber having only conductivity and not deformable.

  By using such a material, it is possible to obtain deformation only in a desired direction, that is, the thickness direction in the present invention, without deforming the base fabric itself.

  Examples of these are carbon fibers (Toray (made by Toray), Dona Carbo (Osaka Gas Chemical), etc.) that are generally available on the market, and carbon fibers and carbon powders are mixed to spin. It is also possible to use reinforced fibers.

In general, conductive materials include carbon powders such as carbon black and ketjen black, metal fine particles such as carbon fibers, iron and aluminum, and tin oxide (SnO ₂ ) and zinc oxide (ZnO) as semiconductive fine particles. Among these, it is desirable to use carbon fiber or carbon powder from the viewpoint of availability and specific gravity.

The average length in the longitudinal direction of the carbon fibers used for these conductive materials is preferably in the range of 0.3 × 10 ^{−6 to} 100 × 10 ⁻⁶ m. By setting the average length within this range, the dispersibility when mixed into the matrix resin is good, and it is easy to reduce the diameter when fiberized. Here, the average length in the longitudinal direction is the median value of the fiber lengths of all the fibers used for mixing, with the length of the carbon fibers being the maximum length of each carbon fiber.

When carbon powder is used for these conductive materials, the average particle diameter is desirably in the range of 10 × 10 ^{−9 to} 100 × 10 ⁻⁹ m. By setting it within this range, the dispersibility when mixed into the matrix resin is good, and it is easy to reduce the diameter when fiberized. Here, the average particle diameter is the primary particle diameter of the carbon powder, and means the median value of the particle diameters of all particles used for mixing. The secondary particle size varies depending on the degree of structure formation, but is not particularly limited here.

  The blending amount of carbon fiber and carbon powder as the conductive material is desirably in the range of 0.5 to 500 vol% of the blending amount of the piezoelectric material component. By making it within this range, the conductivity is good, and when mixed into the matrix resin, the viscosity when the mixed resin is melted is suitable, the spinnability is also good, and fiberization is easy That's why.

  For these matrix resins, it is possible to use general-purpose resins such as polyamides such as nylon 6 and nylon 66, polyethylene terephthalate, polyethylene terephthalate containing a copolymer component, polybutylene terephthalate, and polyacrylonitrile, either alone or in combination. From the viewpoint of sex.

  In another embodiment, the fiber structure and the three-dimensional knitted actuator according to the present invention are preferably provided with a terminal for each unit for driving the knitted fabric.

  The drive unit refers to the range of the area to be moved in the surface of the fiber structure. By installing a terminal for each unit, the divided range can be moved separately.

  A solid knitted actuator with a terminal for each unit to be driven replaces the fiber material used in the vehicle, thereby transmitting signals from the vehicle to the occupant and improving the ride comfort by moving the fibers. It is preferable to use it.

  In the example used for the seat, the vehicle inclination and the occupant's posture are detected using other means, feedback is applied as an actuator, the necessary parts are moved and the posture is corrected to improve riding comfort, The operation position such as the back can be set.

  Further, by using the actuate function mainly, it is possible to provide information transmission means to the driver and passengers from the seat, steering, shift knob, interior wall surface, and the like.

  In addition to application to these vehicles, it can be used as a bed sheet in hospitals and nursing homes to detect stressed positions, assist in turning over, and detect places where stress is applied. It is also effective to introduce deformation for changing the air flow rate.

    Hereinafter, the present invention will be described more specifically based on examples.

Example 1
Using acetone (manufactured by Wako Chemical Co., Ltd .: 019-00353) as a solvent phase by a wet spinning method, an aqueous dispersion of a conductive polymer PEDOT / PSS (Bayltron P (registered trademark) manufactured by Starck) once filtered at 2 μL / min. The conductive polymer fiber having a diameter of about 10 μm was obtained by extruding from a microsyringe (manufactured by Ito Seisakusho, MS-GLL100, needle portion inner diameter 260 μm) at a speed of 1 mm. The conductivity of the obtained conductive polymer fiber was measured in accordance with JIS K 7194 (resistivity test method by conductive probe 4-probe method), and the reciprocal of the obtained resistivity (Ω · cm) ( When calculated as (S / cm), it was about 1 S / cm.

  The obtained conductive polymer fiber was made into a bundle of every 5000 pieces.

  An aqueous polyester emulsion (manufactured by NSC Japan, AA-64) was applied to the surface of the bundle and dried at 25 ° C. for 24 hours. The thickness of the obtained bundle was about 1 mm.

Polyester fiber nonwoven fabric (Toyobo Spunbond, Ecule 3A01A) is used for the upper and lower base fabrics, and the number of bundles per unit area is 10 / cm ² (about 8% in cross-sectional area ratio, see FIG. 32). And the thickness between the upper and lower base fabrics was set to 10 mm, and the fibers were knitted so that the fibers were applied straight to obtain a fiber structure.

  When electrodes were installed at both ends of the conductive polymer fiber and a voltage of 10 V was applied, it was observed that the thickness direction decreased by about 1 mm in about 3 seconds. When the voltage was released, the original thickness was restored in about 10 seconds.

(Example 2)
A bundle similar to that of Example 1 was formed, and the above bundle was bundled at 10 pieces / cm ² per unit area (cross-sectional area ratio) on a nonwoven fabric made of carbon fiber (Donakabo LFK203 manufactured by Osaka Gas Chemical Co., Ltd.) as a base fabric. About 8%), the thickness between the upper and lower base fabrics was 10 mm, and the fibers were knitted so that they would hang straight.

  Thereafter, the aqueous emulsion was applied to the fiber structure and dried, and the loop portions of the conductive polymer fibers corresponding to the outer sides of the upper and lower base fabrics were cut to obtain a fiber structure, which was used for evaluation.

(Example 3)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area is 10 pieces / cm ² (about 8% in cross-sectional area ratio), and the thickness between the upper and lower base fabrics is 10 mm. A fiber structure woven so that the fibers cross and hang was obtained and used for evaluation.

Example 4
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area is 10 pieces / cm ² (about 8% in cross-sectional area ratio), and the thickness between the upper and lower base fabrics is 10 mm. A fiber structure knitted so that the fibers loop and hang was obtained and used for evaluation.

(Example 5)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area was 3 / cm ² (the cross-sectional area ratio was about 2%), and the thickness between the upper and lower base fabrics was 10 mm. A braided fiber structure was obtained and used for evaluation.

(Example 6)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area was 66 / cm ² (about 50% in terms of the cross-sectional area), and the thickness between the upper and lower base fabrics was 10 mm. A braided fiber structure was obtained and used for evaluation.

(Example 7)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area was 100 / cm ² (about 80% in cross-sectional area ratio), and the thickness between the upper and lower base fabrics was 10 mm. A braided fiber structure was obtained and used for evaluation.

(Example 8)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area is 10 / cm ² (about 8% in terms of the cross-sectional area), and the thickness between the upper and lower base fabrics is 5 mm. A braided fiber structure was obtained and used for evaluation.

Example 9
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area is 10 / cm ² (about 8% in terms of the cross-sectional area), and the thickness between the upper and lower base fabrics is 30 mm. A braided fiber structure was obtained and used for evaluation.

(Example 10)
Using a bundle and a base fabric coated in the same manner as in Example 1, the number of bundles per unit area is 10 / cm ² (about 8% in terms of the cross-sectional area), and the thickness between the upper and lower base fabrics is 50 mm. A braided fiber structure was obtained and used for evaluation.

(Example 11)
A bundle similar to that of Example 2 was formed, and the above bundle was bundled at 10 pieces / cm ² per unit area (cross-sectional area ratio) on a nonwoven fabric (Donakabo LFK203 manufactured by Osaka Gas Chemical Co., Ltd.) made of carbon fiber as a base fabric. About 8%), the thickness between the upper and lower base fabrics was 10 mm, and a knitted fiber structure was obtained and used for evaluation.

(Example 12)
A bundle similar to that of Example 2 was formed, a polyester fiber nonwoven fabric (Toyobo Spunbond, Ecule 3A01A) on the upper base fabric, and a nonwoven fabric made of carbon fiber on the lower base fabric (Donakabo LFK203 manufactured by Osaka Gas Chemical Co., Ltd.). ), The number of bundles per unit area is 10 / cm ² (the cross-sectional area ratio is about 8%), and the thickness between the upper and lower base fabrics is 10 mm to obtain a braided fiber structure. It was.

  Thereafter, the aqueous emulsion was applied to the fiber structure and dried, and the loop portion of the conductive polymer fiber on the outside of the lower base fabric was cut to obtain a fiber structure, which was used for evaluation.

(Example 13)
An acrylonitrile solution (resin concentration 25%) using N, N-dimethylacetamide (DMAc) as a solvent is provided from the core of the core-sheath type wet spinner, and PEDOT / PSS is 0.2 mL / min. Were simultaneously discharged into DMAc (concentration: 85%) to obtain a core-sheath fiber (diameter: 15 μm, sheath amount: about 30%, sheath portion porosity: about 30%).

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 14)
As in Example 13, an acrylonitrile solution (resin concentration 25%) using N, N-dimethylacetamide (DMAc) as a solvent from one of the bases of the side-by-side type wet spinner, and PEDOT / PSS from the other is 0, respectively. .2 mL / min. Were simultaneously discharged into DMAc (concentration 85%) at a speed of 1 to obtain side-by-side fibers (diameter 15 μm).

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 15)
Conductive polymer fibers were obtained under the same conditions as in Example 1. A bundle was formed in the state of a long fiber, and then an aqueous acrylic emulsion (NSC Japan, AA-64) was applied in a continuous process so that the final fiber diameter was 15 μm, and dried at 25 ° C. for 24 hours.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 16)
Conductive polymer fibers were obtained under the same conditions as in Example 1. On this bundle surface, a water-based polyester emulsion (made by NSC Japan, AA-64) mixed with about 10% by mass of pyrolytic sodium hydrogen carbonate as a foam material is applied on the surface and gently foamed in an environment of 50 ° C. It was dried for 24 hours. The obtained bundle had a porous surface (porosity of about 50%) and a thickness of about 1 mm.

Using the obtained bundle, the number of bundles per unit area is 10 / cm ² (about 8% in terms of cross-sectional area) on the base fabric, the thickness between the upper and lower base fabrics is 10 mm, and the fibers are applied straight. A woven fiber structure was obtained and used for evaluation.

(Example 17)
Conductive polymer fibers were obtained under the same conditions as in Example 1. The fibers were bundled but not covered, and the number of bundles per unit area was 10 / cm ² (about 8% in terms of cross-sectional area) on the base fabric, and the thickness between the upper and lower base fabrics was 10 mm. A fiber structure knitted so that the fibers are straightly applied was obtained and used for evaluation.

(Example 18)
In the same wet spinning method as in Example 1, the inner diameter of the needle part is 300 μm, and the extrusion speed is 5 μL / min. As a result, a conductive polymer fiber having a diameter of about 10 μm was obtained. The conductivity of the obtained conductive polymer fiber was about 0.1 S / cm.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

Example 19
A conductive polymer fiber was obtained in the same manner as in Example 1 except that 5% by mass of a silver colloid aqueous dispersion (Pastran manufactured by Mitsui Mining & Mining) was added to the PEDOT / PSS aqueous dispersion as a conductive component. The conductivity of the obtained conductive polymer fiber was about 10 S / cm.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 20)
Conductive polymer fibers were obtained in the same manner as in Example 1 except that 10% by mass of a silver colloid aqueous dispersion (Pastran manufactured by Mitsui Mining & Mining) was added to the PEDOT / PSS aqueous dispersion as a conductive component. The conductivity of the obtained conductive polymer fiber was about 100 S / cm.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 21)
Fibers and bundles were obtained in the same manner except that a 5% polypyrrole aqueous solution (manufactured by Aldrich) was used as the conductive polymer by the same wet spinning method and coating method as in Example 1. The conductivity of the obtained conductive polymer fiber was about 10 S / cm.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 22)
In order to obtain a polypyrrole film as a precursor for making conductive polymer fibers, 0.4 g of pyrrole and 1.15 g of tetraethylammonium perchlorate were dissolved in propylene carbonate containing lvol% water to make 100 ml, and platinum was used as the positive electrode. The above solution was put into an electropolymerization cell using a plate (length 100 mm, width 100 mm, thickness 0.1 mm) and an aluminum foil (length 200 mm, width 50 mm, thickness 0.01 mm) as a negative electrode.

After leaving the electrolytic polymerization cell in a low-temperature thermostatic bath for 30 minutes, a constant current of 1.25 mA (current density of 0.125 mA / cm ² ) was applied from a potentiostat for 12 hours to perform electrolytic polymerization. The polymerization temperature was -20 ° C.

  The obtained polypyrrole film is peeled off from the platinum plate, washed in propylene carbonate for about 1 hour, further dried in vacuum for 1 day, and cut into a length of 50 mm and a width of 1 mm for use as a conductive polymer fiber. It was. The conductivity of this film was about 100 S / cm.

The cut fibers are woven into the base fabric so that the number of fibers per unit area is 10 / cm ² (the cross-sectional area ratio is about 8%), the thickness between the upper and lower base fabrics is 10 mm, and the fibers are applied straight. A fiber structure was obtained and used for evaluation.

(Example 23)
Fibers and bundles were obtained in the same manner except that a 5% polyaniline aqueous solution (manufactured by Aldrich) was used as the conductive polymer by the same wet spinning method and coating method as in Example 1. The conductivity of the obtained conductive polymer fiber was about 10 S / cm.

The obtained fibers were bundled and coated in the same manner as in Example 1, and the number of bundles per unit area was set to 10 / cm ² (about 8% in terms of the cross-sectional area) on the base fabric. A fiber structure with a thickness of 10 mm and braided so that the fibers are straightly applied was obtained and used for evaluation.

(Example 24)
In order to synthesize fibers by the electrospinning method, 50 vol. Of methanol was added to a 2.5% aqueous solution of paraxylene tetrahydrothiophenium chloride as a stock solution. The solution added so as to be% was used. This was applied with a voltage of 5 kV from a needle tip having an inner diameter of 340 μm, and precursor fibers were deposited on an aluminum foil substrate 20 cm below the needle tip. The obtained precursor fiber was vacuum dried at 250 ° C. for 24 hours, and the obtained nanofiber (diameter about 10 nm) was used as a twisted yarn to obtain a fiber having a diameter of about 10 μm. The conductivity of the obtained conductive polymer fiber was about 10 S / cm.

  The fibers were further bundled to form a bundle, and then an aqueous polyester emulsion (manufactured by NSC Japan, AA-64) was applied to the surface and dried at 25 ° C. for 24 hours.

In the same manner as in Example 1, the obtained fiber was 10 fibers / cm ² per unit area (about 8% in terms of cross-sectional area) on the base fabric, and the thickness between the upper and lower base fabrics was 10 mm. A fiber structure knitted so that it was applied straight was obtained and used for evaluation.

(Example 25)
Conductive polymer fibers obtained in the same manner as in Example 1 were bundled in a long state and coated in a continuous process.

In the same manner as in Example 1, the obtained fiber was 10 fibers / cm ² per unit area (about 8% in terms of cross-sectional area) on the base fabric, and the thickness between the upper and lower base fabrics was 10 mm. Was divided into 4 areas so that the fiber structure was applied straight, and a fiber structure in which 4 bundles were knitted was obtained and used for evaluation.

  When the electrode was installed for each bundle, it was confirmed that the electrode was driven for each bundle.

(Example 26)
When the fabric of Example 1 is used for the seat surface of the vehicle (FIG. 33) and a voltage of 10 V is repeatedly applied with a rectangular wave of 0.1 Hz (FIG. 34), a feeling of pressure is repeatedly applied to the buttocks during operation. I was able to.

(Comparative Example 1)
An electrode was placed on a commercially available three-dimensional knitted fabric (Fusion AKE64036 manufactured by Asahi Kasei Co., Ltd.) and a voltage was applied, but it was not driven.

(Evaluation test)
The fiber structures obtained in Examples and Comparative Examples were prepared as 40 mm squares, and copper wires (CU-1111086 made by Niraco) having a diameter of 0.025 mm were attached to both ends of the bundle of conductive polymer fibers used. The following tests were conducted using Kasei D-500). (Fig. 35)
(Displacement test)
With respect to the fiber structures obtained in Examples 1 to 24 and Comparative Example 1 and conventional products, a laser displacement meter (LB-5000 manufactured by Keyence) was used, and the temperature conditions were 25 ° C. and humidity 60% R in a thermostatic bath. . H. As a result, the amount of displacement was evaluated. (Fig. 36)
In FIG. 36, the fiber structure 1 as a sample is installed between the pair of measurement heads 42 in the thermostatic chamber 40, and the expansion and contraction of the sample is measured by the measuring laser 43, and is provided outside the thermostatic chamber 40. The displacement is determined by the laser displacement meter 41. The obtained evaluation results are shown in Table 1.

  As a result of these implementations, a fiber structure having an actuate function could be obtained in comparison with the comparative example. By replacing the material made of these fibers with a conventional material, a new function can be imparted to the fiber product.

It is a schematic diagram which shows the example of a shape of a knitted fabric. It is a schematic diagram which shows the example of a shape of a knitted fabric. It is a perspective view which shows the fiber structure of this invention. It is a side cross-sectional schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows the fiber structure of this invention. It is a schematic diagram which shows another example of the fiber structure of this invention. It is a schematic diagram which shows the AA'B'B cross section of FIG. 10A. FIG. 10B is another schematic diagram illustrating a cross section taken along line AA′B′B in FIG. 10A. It is a schematic diagram which shows the bundle used for this invention. It is an example of the chemical formula of an acetylene type conductive polymer. It is an example of the chemical formula of a pyrrole type conductive polymer. It is an example of the chemical formula of a thiophene type conductive polymer. It is an example of the chemical formula of a phenylene type conductive polymer. It is an example of the chemical formula of an aniline type conductive polymer. It is a schematic diagram of a wet spinning apparatus. It is a schematic diagram of an electrospinning apparatus. It is a schematic diagram which shows the example of the shape of the fiber which consists of a single component. It is a schematic diagram which shows the example of a shape of a core sheath type fiber. It is a schematic diagram which shows the example of a shape of a side-by-side type fiber. It is a schematic diagram which shows the example of a shape of a sea island type fiber. It is a schematic diagram which shows the example of a shape of an atypical (triangular) cross-section fiber. It is a schematic diagram which shows the example of a shape of an atypical (star shape) cross-section fiber. It is a schematic diagram which shows the example of a shape of a hollow fiber. It is a cross-sectional schematic diagram which shows the cross-sectional shape of the conductive polymer fiber in which one part of the surface layer was formed with a different material. It is a schematic diagram of the apparatus which provided the application | coating process in the wet spinning apparatus. It is a cross-sectional schematic diagram which shows the cross-sectional shape of the conductive polymer fiber in which one part of the inner diameter cross section is formed of a different material. It is a cross-sectional schematic diagram which shows the cross-sectional shape of the conductive polymer fiber in which one part of the inner diameter cross section is formed of a different material. It is a cross-sectional schematic diagram which shows the cross-sectional shape of the conductive polymer fiber in which one part of the inner diameter cross section is formed of a different material. It is a schematic diagram of the apparatus which provided the coating process in the wet spinning apparatus. It is the schematic which shows the fiber number per unit area between upper and lower base fabrics. It is the schematic which installed the textile fabric of this invention on the sheet | seat. It is drawing which shows an applied voltage waveform. It is the schematic of the evaluation method concerning this invention. It is the schematic of the evaluation method concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fiber structure 2 of this invention Upper and lower base fabric 3 Conductive polymer fiber, and / or bundle 4 consisting thereof Conductive polymer fiber, and folding part 5 on base fabric of bundle consisting thereof Conductive polymer fiber, And / or a cut end portion 10 on a base fabric of a bundle comprising the fiber precursor 11 fiber 12a sheath component 12b of core-sheath fiber core component 13a of core-sheath fiber 1b component 13b of side-by-side fiber 1b from a material different from 3a of side-by-side fiber Component 14a Sea-island fiber component 14b Sea-island fiber island component 15a Hollow fiber component 15b Hollow fiber hollow part 20 Wet spinning device 21 Wet spinning cap 22 Wet spinning solvent tank 23 Fiber feeder 24 Fiber winding Apparatus 25 Coating / drying device 26 Coating tank 27 Drying device 28 Base needle 30 Electrospinning device 3 1 Cylinder 32 Cylinder needle 33 Electrode 34 Insulation material (base)
35 Voltage application device 36 Electric wire.

Claims (15)

  A fiber structure comprising a pair of base fabrics having a constant interval connected by conductive polymer fibers.   The conductive polymer fiber is installed so that the major axis direction of the fibers is aligned between the base fabrics, and / or the pair of base fabrics are knitted with the conductive polymer fibers. Item 1. A fiber structure according to Item 1.   The fiber structure according to claim 1 or 2, wherein the conductivity of the conductive polymer fiber is in a range of 0.5 to 500 S / cm.   The conductive polymer fiber includes at least one selected from the group consisting of polypyrrole, polyaniline, PEDTOT / PSS doped with poly-4-styrenesulfonate in 3,4-ethylenedioxythiophene, and PPV. The fiber structure according to any one of claims 1 to 3, wherein   The fiber structure according to any one of claims 1 to 4, wherein a part and all of the fiber structure is covered with another polymer.   The fiber according to any one of claims 1 to 5, wherein the conductive polymer fiber has a core-sheath type, a side-by-side type, or a sea-island type cross-sectional shape in combination with another polymer. Structure.   The fiber structure according to claim 5 or 6, wherein the other polymer used for the conductive polymer fiber includes an elastomer.   The other polymer used for the conductive polymer fiber includes a porous body, and the fiber structure according to any one of claims 5 to 7.   A three-dimensional knitted actuator using the fiber structure according to any one of claims 1 to 8.   The three-dimensional knitted fabric mold according to claim 10, wherein the pair of base fabrics are knitted with the conductive polymer fiber, and a terminal for each unit for driving the fiber structure is installed. Actuator.   The three-dimensional knitted actuator according to claim 9, wherein at least one selected from the group consisting of conductive woven fabric and non-woven fabric is used as at least one of the base fabrics.   12. The three-dimensional knitted actuator according to claim 11, wherein the conductive woven fabric and the nonwoven fabric are made of at least one selected from the group consisting of carbon-mixed fibers and carbon fibers.   The three-dimensional knitted actuator according to claim 11 or 12, further comprising a terminal for each unit for driving the fiber structure.   A vehicle component using the three-dimensional knitted actuator according to any one of claims 9 to 13.   2. The method for producing a fiber structure according to claim 1, wherein the conductive polymer fibers are bundled to form a bundle, and then the pair of base fabrics are connected with the bundled conductive polymer fibers while maintaining a constant interval.

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