JPWO2019130808A1 - Conductive fabric and method for manufacturing conductive fabric - Google Patents
Conductive fabric and method for manufacturing conductive fabric Download PDFInfo
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- JPWO2019130808A1 JPWO2019130808A1 JP2019562801A JP2019562801A JPWO2019130808A1 JP WO2019130808 A1 JPWO2019130808 A1 JP WO2019130808A1 JP 2019562801 A JP2019562801 A JP 2019562801A JP 2019562801 A JP2019562801 A JP 2019562801A JP WO2019130808 A1 JPWO2019130808 A1 JP WO2019130808A1
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- 239000004744 fabric Substances 0.000 title claims abstract description 133
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 4
- 239000000835 fiber Substances 0.000 claims abstract description 118
- 238000009940 knitting Methods 0.000 claims abstract description 110
- 239000000470 constituent Substances 0.000 claims abstract description 81
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/18—Other fabrics or articles characterised primarily by the use of particular thread materials elastic threads
- D04B1/20—Other fabrics or articles characterised primarily by the use of particular thread materials elastic threads crimped threads
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Of Fabric (AREA)
Abstract
導電性生地１は、表面が導電性を有する複数の構成繊維２１により構成された第１編糸１１１を含む第１層１１と、第２編糸１２１を含む第２層１２と、第１編糸１１１と第２編糸１２１とを連結する連結編糸１３１を含み、かつ第１層１１と第２層１２との間に形成された連結層１３と、を有し、複数の構成繊維２１の少なくとも一部の構成繊維２１は、長手方向の異なる複数の位置において異なる一以上の他の構成繊維２１に接触している。The conductive fabric 1 includes a first layer 11 including a first knitting yarn 111 composed of a plurality of constituent fibers 21 having a conductive surface, a second layer 12 including a second knitting yarn 121, and a first knitting yarn. A plurality of constituent fibers 21 including a connecting knitting yarn 131 for connecting the yarn 111 and the second knitting yarn 121, and having a connecting layer 13 formed between the first layer 11 and the second layer 12. At least a part of the constituent fibers 21 are in contact with one or more other constituent fibers 21 which are different at a plurality of positions different in the longitudinal direction.
Description
本発明は、導電性を有する導電性生地及び導電性生地の製造方法に関する。 The present invention relates to a conductive fabric having conductivity and a method for producing the conductive fabric.
心拍を測定したり、人体に電気的刺激を与えたりするために、人の皮膚の表面に装着される電極が用いられている。特許文献１には、導電性を有するゲル接着剤を含む電極を介して電気生理学的信号をモニタリングする方法が開示されている。特許文献２には、導電性の繊維が用いられた生地状の電極が開示されている。 Electrodes that are attached to the surface of human skin are used to measure heartbeats and to provide electrical stimulation to the human body. Patent Document 1 discloses a method of monitoring an electrophysiological signal via an electrode containing a conductive gel adhesive. Patent Document 2 discloses a dough-like electrode using a conductive fiber.
ゲル接着剤を含む電極においては、心拍を測定したり人体に電気的刺激を与えたりするために十分な程度にインピーダンスを低くすることができる。しかしながら、ゲル接着剤は皮膚刺激性が強いため、皮膚に炎症が生じるおそれがあり、長期間の装着に適していないという問題があった。一方、生地状の電極を用いる場合、ゲル接着剤を含む電極に比べてインピーダンスが高いという問題があった。 In electrodes containing a gel adhesive, the impedance can be low enough to measure the heart rate and provide electrical stimulation to the human body. However, since the gel adhesive has strong skin irritation, there is a possibility that the skin may be inflamed, and there is a problem that it is not suitable for long-term wearing. On the other hand, when a fabric-like electrode is used, there is a problem that the impedance is higher than that of an electrode containing a gel adhesive.
そこで、本発明はこれらの点に鑑みてなされたものであり、ゲル接着剤を含まない導電性生地のインピーダンスを低下させることを目的とする。 Therefore, the present invention has been made in view of these points, and an object of the present invention is to reduce the impedance of the conductive fabric containing no gel adhesive.
本発明の第１の態様の導電性生地は、表面が導電性を有する複数の構成繊維により構成された第１編糸を含む第１層と、第２編糸を含む第２層と、前記第１編糸と前記第２編糸とを連結する連結編糸を含み、かつ前記第１層と前記第２層との間に形成された連結層と、を有し、前記複数の構成繊維の少なくとも一部の構成繊維は、長手方向の異なる複数の位置において異なる一以上の他の構成繊維に接触していることを特徴とする。 The conductive fabric according to the first aspect of the present invention includes a first layer containing a first knitting yarn composed of a plurality of constituent fibers having a conductive surface, a second layer containing a second knitting yarn, and the above. The plurality of constituent fibers include a connecting knitting yarn that connects the first knitting yarn and the second knitting yarn, and has a connecting layer formed between the first layer and the second layer. At least some of the constituent fibers of the above are in contact with one or more different constituent fibers at a plurality of different positions in the longitudinal direction.
前記第１編糸を構成する前記複数の構成繊維は、前記導電性生地に外力が加わった状態において、前記外力が加わっていない状態で接触する他の構成繊維と異なる他の構成繊維に接触していてもよい。前記第１層内の２点間のインピーダンスは、周囲の湿度が高くなるにつれて低下してもよい。 The plurality of constituent fibers constituting the first knitting yarn come into contact with other constituent fibers different from the other constituent fibers that come into contact with the conductive fabric in a state where an external force is applied and without the external force applied. May be. The impedance between the two points in the first layer may decrease as the ambient humidity increases.
前記連結編糸が導電性のウーリー加工糸であり、前記第１層と前記第２層とを近づける方向の外力が加わった状態でのインピーダンスが、前記外力が加わっていない状態でのインピーダンスよりも低くてもよい。 The connecting knitting yarn is a conductive woolly processed yarn, and the impedance when an external force is applied in the direction of bringing the first layer and the second layer closer to each other is higher than the impedance when the external force is not applied. It may be low.
前記連結編糸が導電性のウーリー加工糸であり、前記連結編糸を直線状に伸ばした状態での長さが、前記第１層と前記第２層とを近づける方向の外力が加わっていない状態での前記第１層と前記第２層との間の距離よりも長く、前記外力が加わっていない状態で、隣接する複数の前記連結編糸が接触していてもよい。 The connecting knitting yarn is a conductive woolly processed yarn, and the length of the connecting knitting yarn in a linearly stretched state is not applied with an external force in a direction in which the first layer and the second layer are brought closer to each other. A plurality of adjacent connecting knitting yarns may be in contact with each other in a state where the distance between the first layer and the second layer is longer than the distance between the first layer and the second layer in the state and the external force is not applied.
前記第１編糸の断面の直径が、前記連結編糸の断面の直径よりも小さくてもよい。また、ウェール方向の伸長率がコース方向の伸長率よりも大きくてもよい。前記複数の構成繊維のうち、所定の大きさ以上の電流が流れた構成繊維が溶断してもよい。 The diameter of the cross section of the first knitting yarn may be smaller than the diameter of the cross section of the connecting knitting yarn. Further, the elongation rate in the wale direction may be larger than the elongation rate in the course direction. Among the plurality of constituent fibers, the constituent fibers to which a current of a predetermined size or larger has flowed may be fused.
本発明の第２の態様の導電性生地の製造方法は、第１編糸を含む第１層と、第２編糸を含む第２層と、前記第１編糸と前記第２編糸とを連結する連結編糸を含み、かつ前記第１層と前記第２層との間に形成された連結層と、を有する導電性生地の製造方法であって、表面が導電性を有する複数の構成繊維がウーリー加工され、前記複数の構成繊維の少なくとも一部の構成繊維が、長手方向の異なる複数の位置において異なる一以上の他の構成繊維に接触している前記複数の構成繊維により構成される前記第１編糸を作成する工程と、前記第２編糸を作成する工程と、前記連結編糸を作成する工程と、前記第１編糸及び前記第２編糸を前記連結編糸で連結する工程と、を有する。 The method for producing a conductive fabric according to a second aspect of the present invention includes a first layer containing a first knitting yarn, a second layer containing a second knitting yarn, the first knitting yarn, and the second knitting yarn. A method for producing a conductive fabric, comprising a connecting knitting yarn for connecting the above-mentioned yarns and having a connecting layer formed between the first layer and the second layer, wherein the surface of the fabric is conductive. The constituent fibers are woolly processed, and at least a part of the constituent fibers is composed of the plurality of constituent fibers in contact with one or more different constituent fibers at a plurality of different positions in the longitudinal direction. The step of creating the first knitting yarn, the step of creating the second knitting yarn, the step of creating the connecting knitting yarn, and the first knitting yarn and the second knitting yarn being combined with the connecting knitting yarn. It has a step of connecting.
本発明によれば、ゲル接着剤を含まない導電性生地のインピーダンスを低下させることができるという効果を奏する。 According to the present invention, there is an effect that the impedance of the conductive fabric containing no gel adhesive can be lowered.
［導電性生地１の概要］
図１は、本実施の形態に係る導電性生地１の概要を説明するための図である。導電性生地１は、心拍を測定したり人体に電気的刺激を与えたりするために、人体の皮膚の表面に貼り付けられた状態で使用される。[Overview of Conductive Fabric 1]
FIG. 1 is a diagram for explaining an outline of the conductive fabric 1 according to the present embodiment. The conductive fabric 1 is used in a state of being attached to the surface of the skin of the human body in order to measure the heartbeat and give an electrical stimulus to the human body.
図１（ａ）は、皮膚に貼り付けられる面から見た場合の導電性生地１の模式図である。図１（ｂ）は、導電性生地１のＡ−Ａ線断面図である。導電性生地１は、ダブルラッセル編み機により製造されており、図１（ｂ）に示すように、第１層１１と、第２層１２と、連結層１３とを有する。第１層１１は、皮膚に接触する面を有する。第２層１２には、例えば、電流源を有する装置に導電性生地１を接続するためのコネクタが設けられる。 FIG. 1A is a schematic view of the conductive fabric 1 when viewed from the surface to be attached to the skin. FIG. 1B is a cross-sectional view taken along the line AA of the conductive fabric 1. The conductive fabric 1 is manufactured by a double Russell knitting machine, and has a first layer 11, a second layer 12, and a connecting layer 13 as shown in FIG. 1 (b). The first layer 11 has a surface that comes into contact with the skin. The second layer 12 is provided with, for example, a connector for connecting the conductive fabric 1 to a device having a current source.
図２は、導電性生地１の構造を示す模式図である。図２は、導電性生地１を斜め方向から見た状態を示している。図２に示すように、第１層１１は、表面が導電性を有する複数の構成繊維により構成された第１編糸１１１を含む層である。第１編糸１１１は、導電性を有する複数の構成繊維を束ねてから捩った状態で加熱し、加熱後に捩じりを戻すことにより製造されたウーリー加工糸（仮撚り加工糸ともいう）である。 FIG. 2 is a schematic view showing the structure of the conductive fabric 1. FIG. 2 shows a state in which the conductive fabric 1 is viewed from an oblique direction. As shown in FIG. 2, the first layer 11 is a layer including the first knitting yarn 111 whose surface is composed of a plurality of constituent fibers having conductivity. The first knitting yarn 111 is a woolly processed yarn (also referred to as false twisting processed yarn) produced by bundling a plurality of conductive constituent fibers, heating the yarn in a twisted state, and then untwisting after heating. Is.
第２層１２は、第２編糸１２１を含む層である。連結層１３は、第１編糸１１１と第２編糸１２１とを連結する連結編糸１３１を含み、第１層１１と第２層１２との間に形成された層である。第２編糸１２１及び連結編糸１３１としては任意の糸を使用することができるが、本実施の形態では、第１編糸１１１と同じ材質及び形状の導電性を有するウーリー加工糸であるものとする。 The second layer 12 is a layer containing the second knitting yarn 121. The connecting layer 13 includes a connecting knitting yarn 131 that connects the first knitting yarn 111 and the second knitting yarn 121, and is a layer formed between the first layer 11 and the second layer 12. Any yarn can be used as the second knitting yarn 121 and the connecting knitting yarn 131, but in the present embodiment, it is a woolly processed yarn having the same material and shape as the first knitting yarn 111. And.
図３は、第１層１１、第２層１２及び連結層１３を構成する導電性繊維２の構造について説明するための図である。図３（ａ）は、導電性繊維２の構造の模式図である。図３（ｂ）は、導電性繊維２を顕微鏡で拡大した写真である。図３（ａ）に示すように、導電性繊維２は、曲線状の複数の構成繊維２１（例えば図３（ａ）に示す２１ａ〜２１ｆ）により構成されている。図３（ａ）においては６本の構成繊維２１しか示していないが、導電性繊維２は、図３（ｂ）に示すように、より多くの構成繊維２１により構成されている。 FIG. 3 is a diagram for explaining the structure of the conductive fibers 2 constituting the first layer 11, the second layer 12, and the connecting layer 13. FIG. 3A is a schematic view of the structure of the conductive fiber 2. FIG. 3B is a photograph of the conductive fiber 2 magnified with a microscope. As shown in FIG. 3A, the conductive fiber 2 is composed of a plurality of curved constituent fibers 21 (for example, 21a to 21f shown in FIG. 3A). Although only 6 constituent fibers 21 are shown in FIG. 3A, the conductive fiber 2 is composed of more constituent fibers 21 as shown in FIG. 3B.
図４は、構成繊維２１の形状について説明するための図である。図４（ａ）は、構成繊維２１の典型的な形状を示しており、図４（ｂ）は、構成繊維２１の各部の寸法を例示している。図４（ｂ）に示すように、７０番手の導電性繊維２は２４本の構成繊維２１を含んでいる。この場合、構成繊維２１の円形状の断面の直径ｄは１９．５４（μｍ）であり、正弦波状に変化する曲線における１周期の長さＬ１は２４２１．８２（μｍ）であり、正弦波状に変化する曲線の短手方向の両端間の距離Ｌ２は４３９．４４（μｍ）である。この場合、Ｌ１の区間を直線状態に伸ばした状態での長さＬ３は、√｛（Ｌ１／２）２＋Ｌ２２｝×２＝２５７６．３６（μｍ）であり、Ｌ３／Ｌ１＝１．０６３である。FIG. 4 is a diagram for explaining the shape of the constituent fibers 21. FIG. 4A shows a typical shape of the constituent fiber 21, and FIG. 4B illustrates the dimensions of each part of the constituent fiber 21. As shown in FIG. 4B, the 70-count conductive fiber 2 contains 24 constituent fibers 21. In this case, the diameter d of the circular cross section of the constituent fiber 21 is 19.54 (μm), and the length L1 of one cycle in the curve changing in a sinusoidal shape is 2421.82 (μm), which is sinusoidal. The distance L2 between both ends of the changing curve in the lateral direction is 439.44 (μm). In this case, the length L3 in the state where the section of L1 is extended in a straight line state is √ {(L1 / 2) 2 + L2 2 } × 2 = 2576.36 (μm), and L3 / L1 = 1.063. Is.
同様に、１００番手の導電性繊維２は３４本の導電性繊維２を含んでいる。この場合、構成繊維２１の円形状の断面の直径ｄは１９．５４（μｍ）であり、正弦波状に変化する曲線における１周期の長さＬ１は３３２０．６０（μｍ）であり、正弦波状に変化する曲線の短手方向の両端間の距離Ｌ２は５１７．６６（μｍ）である。この場合、Ｌ１の区間を直線状態に伸ばした状態での長さＬ３は、√｛（Ｌ１／２）２＋Ｌ２２｝×２＝３４７８．２６（μｍ）であり、Ｌ３／Ｌ１＝１．０４７である。Similarly, the 100-count conductive fiber 2 contains 34 conductive fibers 2. In this case, the diameter d of the circular cross section of the constituent fiber 21 is 19.54 (μm), and the length L1 of one cycle in the curve changing in a sinusoidal shape is 3320.60 (μm), which is sinusoidal. The distance L2 between both ends of the changing curve in the lateral direction is 517.66 (μm). In this case, the length L3 in the state where the section of L1 is extended in a straight line state is √ {(L1 / 2) 2 + L2 2 } × 2 = 3478.26 (μm), and L3 / L1 = 1.047. Is.
導電性繊維２が、このように加工された複数の構成繊維２１により構成されていることで、導電性生地１は、皮膚に接触させた状態で電流を流すために好適な各種の特性を満たすことが可能になる。以下、導電性生地１の特徴について詳細に説明する。 Since the conductive fiber 2 is composed of the plurality of constituent fibers 21 processed in this way, the conductive fabric 1 satisfies various properties suitable for passing an electric current in contact with the skin. Will be possible. Hereinafter, the characteristics of the conductive fabric 1 will be described in detail.
［導電性生地１の特徴］
（低インピーダンス）
図３に示すように、複数の構成繊維２１は概ね同じような形状をしているが、それぞれ異なる位置で曲がっている。そして、複数の構成繊維２１の少なくとも一部の構成繊維は、長手方向の異なる複数の位置（例えば少なくとも２つの位置）において異なる一以上の他の構成繊維２１に接触している。５０％以上の構成繊維２１が、長手方向の異なる複数の位置において、それぞれ異なる一以上の他の構成繊維２１に接触していてもよく、全ての構成繊維２１が、長手方向の異なる複数の位置において、それぞれ異なる一以上の他の構成繊維２１に接触していてもよい。[Characteristics of Conductive Fabric 1]
(Low impedance)
As shown in FIG. 3, the plurality of constituent fibers 21 have substantially the same shape, but are bent at different positions. Then, at least a part of the constituent fibers 21 of the plurality of constituent fibers 21 is in contact with one or more other constituent fibers 21 which are different at a plurality of positions (for example, at least two positions) different in the longitudinal direction. 50% or more of the constituent fibers 21 may be in contact with one or more other constituent fibers 21 which are different from each other at a plurality of positions different in the longitudinal direction, and all the constituent fibers 21 may be in contact with a plurality of different positions in the longitudinal direction. In, it may be in contact with one or more other constituent fibers 21 which are different from each other.
第１編糸１１１、第２編糸１２１及び連結編糸１３１を構成する導電性繊維２が、このような特徴を有する導電性の複数の構成繊維２１により構成されていることで、電流が流れる経路が分散する。したがって、導電性生地１のインピーダンスは、複数の構成繊維２１のそれぞれが長手方向の位置によって異なる構成繊維２１に接触しない従来の導電性生地のインピーダンスに比べて低くなる。 A current flows because the conductive fibers 2 constituting the first knitting yarn 111, the second knitting yarn 121, and the connecting knitting yarn 131 are composed of a plurality of conductive constituent fibers 21 having such characteristics. The route is dispersed. Therefore, the impedance of the conductive fabric 1 is lower than the impedance of the conventional conductive fabric in which each of the plurality of constituent fibers 21 does not come into contact with different constituent fibers 21 depending on the position in the longitudinal direction.
また、連結編糸１３１が導電性のウーリー加工糸である場合、第１層１１と第２層１２とを近づける方向の外力が加わった状態でのインピーダンスが、第１層１１と第２層１２とを近づける方向の外力が加わっていない状態でのインピーダンスよりも低い。そして、外力が大きくなるにつれて、インピーダンスの低下量が小さくなり、所定の外力以上においてインピーダンスが所定の範囲内に収まる。導電性生地１がこのような特徴を有することで、導電性生地１は、皮膚に装着されて衣服等により押された状態で使用される場合にインピーダンスが低下するので、人体に装着して使用される用途に好適である。 Further, when the connecting knitting yarn 131 is a conductive woolly processed yarn, the impedance in a state where an external force in the direction of bringing the first layer 11 and the second layer 12 closer to each other is applied is the impedance of the first layer 11 and the second layer 12. It is lower than the impedance when no external force is applied in the direction of bringing the thread closer to. Then, as the external force increases, the amount of decrease in impedance decreases, and the impedance falls within a predetermined range above a predetermined external force. Since the conductive fabric 1 has such characteristics, the impedance of the conductive fabric 1 decreases when it is attached to the skin and pressed by clothes or the like, so that the conductive fabric 1 is used by being attached to the human body. It is suitable for the intended use.
（クッション性の向上とインピーダンスの変化の抑制）
連結編糸１３１が、曲線状の複数の構成繊維２１を有する導電性繊維２であることで、連結編糸１３１を直線状に伸ばした状態での長さが、第１層１１と第２層１２とを近づける方向の外力が加わっていない状態での第１層１１と第２層１２との間の距離よりも長い。連結編糸１３１を直線状に伸ばした状態での長さは、例えば、第１層１１と第２層１２との間の距離の１．０１倍以上かつ１．５０倍未満である。図４に示した例においては、連結編糸１３１を直線状に伸ばした状態での長さは、第１層１１と第２層１２との間の距離の１．０４倍より大きく、１．０７倍より小さい。(Improved cushioning and suppression of impedance changes)
Since the connecting knitting yarn 131 is a conductive fiber 2 having a plurality of curved constituent fibers 21, the lengths of the connecting knitting yarn 131 in a linearly stretched state are the first layer 11 and the second layer. It is longer than the distance between the first layer 11 and the second layer 12 when no external force is applied in the direction of bringing the 12 closer to each other. The length of the connecting knitting yarn 131 in a linearly extended state is, for example, 1.01 times or more and less than 1.50 times the distance between the first layer 11 and the second layer 12. In the example shown in FIG. 4, the length of the connecting knitting yarn 131 in a linearly extended state is larger than 1.04 times the distance between the first layer 11 and the second layer 12, and 1. It is smaller than 07 times.
連結編糸１３１がこのような特徴を有することで、導電性生地１のクッション性が高くなる。また、連結編糸１３１が、曲線状の導電性繊維２であることで、第１層１１と第２層１２とを近づける方向の外力が加わっていない状態で、隣接する複数の連結編糸１３１が接触している状態になる。連結編糸１３１がこのような特徴を有することにより、第１層１１が皮膚に接触し、第２層１２が測定機に接続される場合に、クッション性を確保しつつ、皮膚と測定機との間のインピーダンスを低くすることができる。 When the connecting knitting yarn 131 has such a feature, the cushioning property of the conductive fabric 1 is enhanced. Further, since the connecting knitting yarn 131 is a curved conductive fiber 2, a plurality of adjacent connecting knitting yarns 131 are not applied with an external force in the direction of bringing the first layer 11 and the second layer 12 closer to each other. Is in contact. When the connecting knitting yarn 131 has such a feature, when the first layer 11 comes into contact with the skin and the second layer 12 is connected to the measuring machine, the skin and the measuring machine can be connected while ensuring cushioning property. The impedance between can be lowered.
また、導電性生地１は、クッション性と低インピーダンスを両立させるべく第１層１１、第２層１２及び連結層１３の各層における導電性繊維２の密度が決定されており、ウェール方向及びコース方向の両方向に伸長可能に構成されている。一例として、導電性生地１は、ウェール方向の伸長率がコース方向の伸長率よりも大きい。このように、導電性生地１が、一方の方向の伸長率が、当該方向に直交する方向の伸長率よりも高くなるように構成されていることは、一方向の動きが他方向の動きよりも大きい部位に装着される用途に好適である。 Further, in the conductive fabric 1, the densities of the conductive fibers 2 in each of the first layer 11, the second layer 12, and the connecting layer 13 are determined in order to achieve both cushioning and low impedance, and the wales direction and the course direction are determined. It is configured to be extendable in both directions. As an example, in the conductive fabric 1, the elongation rate in the wale direction is larger than the elongation rate in the course direction. As described above, the fact that the conductive fabric 1 is configured so that the elongation rate in one direction is higher than the elongation rate in the direction orthogonal to the direction means that the movement in one direction is higher than the movement in the other direction. It is suitable for applications where it is mounted on a large area.
導電性生地が、複数の構成繊維を有する導電性繊維により構成されている場合、複数の構成繊維それぞれの間の間隔を大きくしてクッション性を向上させると、複数の構成繊維の間の接触状態が変化しやすく、インピーダンスが変化しやすい傾向になる。これに対して、導電性生地１においては、第１編糸１１１、第２編糸１２１及び連結編糸１３１を構成する導電性繊維２が有する複数の構成繊維２１がウーリー加工されており、図３に示すように曲率がランダムな曲線状になっている。その結果、導電性生地１に外力が加わった状態において、外力が加わっていない状態で接触する他の構成繊維２１と異なる他の構成繊維２１に接触しやすい。導電性繊維２がこのような構成繊維２１を有することにより、外力の大きさによらず、各構成繊維２１が接触する他の構成繊維２１の数に大きな変動が生じないので、外力の大きさによらず導電性生地１のインピーダンスの変化量が所定の範囲内に収まる。 When the conductive fabric is composed of conductive fibers having a plurality of constituent fibers, if the distance between the plurality of constituent fibers is increased to improve the cushioning property, the contact state between the plurality of constituent fibers is improved. Is easy to change, and the impedance tends to change easily. On the other hand, in the conductive fabric 1, a plurality of constituent fibers 21 included in the conductive fibers 2 constituting the first knitting yarn 111, the second knitting yarn 121, and the connecting knitting yarn 131 are woolly processed. As shown in 3, the curvature is a random curve. As a result, when the conductive fabric 1 is subjected to an external force, it is likely to come into contact with other constituent fibers 21 which are different from the other constituent fibers 21 which are in contact with the conductive fabric 1 without the external force applied. Since the conductive fiber 2 has such a constituent fiber 21, the number of other constituent fibers 21 that each constituent fiber 21 comes into contact with does not change significantly regardless of the magnitude of the external force, so that the magnitude of the external force does not change. Regardless of this, the amount of change in impedance of the conductive fabric 1 falls within a predetermined range.
詳細な実験結果については後述するが、例えば、第１層１１と第２層１２とを近づける方向の外力が加わり、連結層の厚みが、外力が加えられていない状態での厚みの５０％になった状態における第１層内の２点間のインピーダンスは、外力が加わっていない状態における２点間のインピーダンスに対して、−１０％以上かつ＋１０％以下、又は−１５Ω以上かつ＋１５Ω以下である。導電性生地１内の任意の２点間のインピーダンスも、外力が加わっていない状態における２点間のインピーダンスに対して、−１０％以上かつ＋１０％以下、又は−１５Ω以上かつ＋１５Ω以下である。導電性生地１がこのような特性を有することにより、導電性生地１が皮膚の表面に装着された状態で人が動いても、導電性生地１のインピーダンスの変化量が、測定結果に許容誤差以上の変動を与えない範囲に収まるので、導電性生地１は、人が動く状態で装着される用途に好適である。 The detailed experimental results will be described later. For example, an external force in the direction of bringing the first layer 11 and the second layer 12 closer to each other is applied, and the thickness of the connecting layer becomes 50% of the thickness when no external force is applied. The impedance between the two points in the first layer in this state is -10% or more and + 10% or less, or -15Ω or more and + 15Ω or less with respect to the impedance between the two points in the state where no external force is applied. .. The impedance between any two points in the conductive fabric 1 is also -10% or more and + 10% or less, or -15Ω or more and + 15Ω or less with respect to the impedance between the two points when no external force is applied. Since the conductive fabric 1 has such characteristics, even if a person moves while the conductive fabric 1 is attached to the surface of the skin, the amount of change in the impedance of the conductive fabric 1 is an allowable error in the measurement result. Since the conductive fabric 1 is within a range that does not give the above fluctuations, the conductive fabric 1 is suitable for applications in which a person is worn while moving.
（湿度の低下に伴うインピーダンスの低下）
導電性繊維２が導電性の複数の構成繊維２１を有することにより、導電性繊維２が微少量の水分を保持することができる。その結果、第１層１１内の２点間のインピーダンスは、周囲の湿度が高くなるにつれて低下する。第２編糸１２１及び連結編糸１３１も導電性繊維２を有する場合、周囲の湿度が高くなるにつれて導電性生地１内の任意の２点間のインピーダンスも低下する。したがって、導電性生地１は、皮膚に装着された状態で皮膚から発せられる汗によりインピーダンスが低下するので、皮膚に装着した状態で使用される電極として好適である。(Decrease in impedance due to decrease in humidity)
Since the conductive fiber 2 has a plurality of conductive constituent fibers 21, the conductive fiber 2 can retain a very small amount of water. As a result, the impedance between the two points in the first layer 11 decreases as the ambient humidity increases. When the second knitting yarn 121 and the connecting knitting yarn 131 also have the conductive fibers 2, the impedance between any two points in the conductive fabric 1 decreases as the ambient humidity increases. Therefore, the conductive fabric 1 is suitable as an electrode used in the state of being attached to the skin because the impedance is lowered by the sweat emitted from the skin while being attached to the skin.
（過電流による切断）
導電性生地１が皮膚に接触している状態で特定の箇所に過電流が流れてしまうと、皮膚に悪影響を与えてしまうことが想定される。そこで、導電性繊維２は、複数の構成繊維２１のうち、所定の大きさ以上の電流が流れた構成繊維２１が溶断するように構成されている。具体的には、構成繊維２１は、測定に必要な電流（例えば０．１μＡ）では溶断せず、人が刺激を感じるとされている５００μＡ以上の電流が流れた場合に溶断する。構成繊維２１は、測定に必要な電流の約１０倍の電流が流れることで溶断してもよく、例えば１μＡ以上の電流が流れた場合に溶断してもよい。(Cut due to overcurrent)
If an overcurrent flows in a specific place while the conductive fabric 1 is in contact with the skin, it is assumed that the skin is adversely affected. Therefore, the conductive fiber 2 is configured such that, of the plurality of constituent fibers 21, the constituent fibers 21 through which a current of a predetermined size or larger flows are melted. Specifically, the constituent fibers 21 do not melt at the current required for measurement (for example, 0.1 μA), but melt when a current of 500 μA or more, which is said to cause a person to feel irritation, flows. The constituent fibers 21 may be blown when a current about 10 times the current required for measurement flows, and may be blown when, for example, a current of 1 μA or more flows.
［導電性生地１の製造方法］
導電性生地１を製造するにあたって、まず、ウーリー加工された導電性繊維２を準備する。具体的には、まず、表面が導電性を有する複数の構成繊維２１をウーリー加工する。続いて、複数の構成繊維２１のそれぞれが、長手方向の異なる複数の位置において異なる一以上の他の構成繊維２１に接触している複数の構成繊維２１により構成される導電性繊維２により第１編糸１１１を作成する。[Manufacturing method of conductive fabric 1]
In manufacturing the conductive fabric 1, first, the woolly-processed conductive fiber 2 is prepared. Specifically, first, a plurality of constituent fibers 21 having a conductive surface are woolly processed. Subsequently, the conductive fiber 2 composed of the plurality of constituent fibers 21 in which each of the plurality of constituent fibers 21 is in contact with one or more other constituent fibers 21 which are different at a plurality of positions different in the longitudinal direction is first. The knitting yarn 111 is created.
同様に、導電性繊維２により構成される第２編糸１２１、及び導電性繊維２により構成される連結編糸１３１を作成する。続いて、第１編糸１１１、第２編糸１２１及び連結編糸１３１をダブルラッセル編機にセットしてからダブルラッセル編機を動作させることにより、第１編糸１１１及び第２編糸１２１を連結編糸１３１で連結する。このようにすることで、導電性生地１を製造することができる。上記の製造工程において、第２編糸１２１及び連結編糸１３１の材質を第１編糸１１１と異なる材質にしてもよい。 Similarly, the second knitting yarn 121 composed of the conductive fibers 2 and the connecting knitting yarn 131 composed of the conductive fibers 2 are produced. Subsequently, by setting the first knitting yarn 111, the second knitting yarn 121 and the connecting knitting yarn 131 in the double Russell knitting machine and then operating the double Russell knitting machine, the first knitting yarn 111 and the second knitting yarn 121 Is connected by the connecting knitting yarn 131. By doing so, the conductive fabric 1 can be manufactured. In the above manufacturing process, the material of the second knitting yarn 121 and the connecting knitting yarn 131 may be different from that of the first knitting yarn 111.
［実験例］
（実験１）
図５は、導電性生地１の特性を測定するための実験方法について説明するための図である。皮膚の２箇所に導電性生地１ａと導電性生地１ｂを接触させた状態で、導電性生地１ａと導電性生地１ｂとの間に電圧源３及びインピーダンス測定機４を接続した。そして、５０ｋＨｚ、１Ｖの交流電圧を出力可能な電圧源３により電圧を印加状態でインピーダンス測定機４においてインピーダンスＺを測定した。測定したインピーダンスＺは皮膚のインピーダンス、並びに導電性生地１ａ及び導電性生地１ｂのインピーダンスを加算した接触インピーダンスとなる。導電性生地１を構成する導電性繊維２として、ミツフジ株式会社製の銀メッキ導電性繊維であるＡＧｐｏｓｓ（登録商標）を使用した。インピーダンス測定機４として、インピーダンスアナライザＩＭ３５７０（日置電機株式会社製）を使用した。[Experimental example]
(Experiment 1)
FIG. 5 is a diagram for explaining an experimental method for measuring the characteristics of the conductive fabric 1. A voltage source 3 and an impedance measuring machine 4 were connected between the conductive cloth 1a and the conductive cloth 1b in a state where the conductive cloth 1a and the conductive cloth 1b were in contact with each other at two places on the skin. Then, the impedance Z was measured by the impedance measuring machine 4 in a state where the voltage was applied by the voltage source 3 capable of outputting the AC voltage of 50 kHz and 1 V. The measured impedance Z is the contact impedance obtained by adding the impedance of the skin and the impedances of the conductive fabric 1a and the conductive fabric 1b. As the conductive fiber 2 constituting the conductive fabric 1, AGposs (registered trademark), which is a silver-plated conductive fiber manufactured by Mitsufuji Co., Ltd., was used. An impedance analyzer IM3570 (manufactured by Hioki Electric Co., Ltd.) was used as the impedance measuring machine 4.
図６は、測定に用いた本実施の形態に係る導電性生地１、及び比較例としての導電性生地１００の表面の顕微鏡写真である。図６（ａ）は導電性生地１の顕微鏡写真であり、図６（ｂ）は導電性生地１００の顕微鏡写真である。導電性生地１は、ウーリー加工された導電性繊維２により構成されているため、複数の構成繊維２１がさまざまな構成繊維２１と接触していることがわかる。一方、比較例の導電性生地１００は、ウーリー加工されていない編糸により構成されている。ウーリー加工されていない編糸においては、構成繊維が特定の他の構成繊維と接触しており、外力が加わった場合と外力が加わっていない場合との間で、１本の構成繊維が接触する他の構成繊維が変化しづらいという傾向にある。 FIG. 6 is a photomicrograph of the surfaces of the conductive fabric 1 according to the present embodiment used for the measurement and the conductive fabric 100 as a comparative example. FIG. 6A is a photomicrograph of the conductive fabric 1, and FIG. 6B is a photomicrograph of the conductive fabric 100. Since the conductive fabric 1 is composed of the woolly-processed conductive fibers 2, it can be seen that the plurality of constituent fibers 21 are in contact with various constituent fibers 21. On the other hand, the conductive fabric 100 of the comparative example is composed of knitting yarn that has not been woolly processed. In a knitted yarn that has not been woolly processed, the constituent fibers are in contact with other specific constituent fibers, and one constituent fiber is in contact between the case where an external force is applied and the case where no external force is applied. Other constituent fibers tend to be difficult to change.
図７は、導電性生地１に圧力が加えられた場合の接触インピーダンスを示す図である。図７は、第１被験者が導電性生地１を装着した場合の接触インピーダンス、導電性生地１００を装着した場合の接触インピーダンス、及びゲル付電極２００を装着した場合の接触インピーダンスを示している。図７における横軸は、導電性生地１、導電性生地１００及びゲル付電極２００のそれぞれに印加した圧力を示しており、縦軸は接触インピーダンスを示している。 FIG. 7 is a diagram showing the contact impedance when pressure is applied to the conductive fabric 1. FIG. 7 shows the contact impedance when the first subject wears the conductive cloth 1, the contact impedance when the conductive cloth 100 is worn, and the contact impedance when the electrode 200 with gel is worn. The horizontal axis in FIG. 7 shows the pressure applied to each of the conductive cloth 1, the conductive cloth 100, and the electrode with gel 200, and the vertical axis shows the contact impedance.
図７における実線は導電性生地１の測定結果を示しており、破線は導電性生地１００の測定結果を示しており、一点鎖線はゲル付電極２００の測定結果を示している。また、■は、導電性生地１及び導電性生地１００が乾燥した状態で測定した結果を示しており、●は、導電性生地１及び導電性生地１００に霧吹きにより水を噴霧した後の湿った状態で測定した結果を示している。 The solid line in FIG. 7 shows the measurement result of the conductive cloth 1, the broken line shows the measurement result of the conductive cloth 100, and the alternate long and short dash line shows the measurement result of the electrode 200 with gel. Further, (3) shows the results of measurement in a state where the conductive cloth 1 and the conductive cloth 100 are dried, and (●) shows the results of the measurement after spraying water on the conductive cloth 1 and the conductive cloth 100 by spraying. The result measured in the state is shown.
まず、乾燥した状態と湿った状態とを比較すると、湿った状態において接触インピーダンスが大幅に低下していることを確認できる。また、湿った状態において、導電性生地１の接触インピーダンスは、導電性生地１００の接触インピーダンスに比べて低くなっており、ゲル付電極２００の接触インピーダンスとほぼ等しくなっていることを確認できる。さらに、圧力の変化に伴う導電性生地１の接触インピーダンスの変化量が、導電性生地１００の接触インピーダンスの変化量、及びゲル付電極２００の接触インピーダンスの変化量よりも小さいことを確認できる。 First, by comparing the dry state and the wet state, it can be confirmed that the contact impedance is significantly reduced in the wet state. Further, in a damp state, the contact impedance of the conductive fabric 1 is lower than the contact impedance of the conductive fabric 100, and it can be confirmed that the contact impedance is substantially equal to the contact impedance of the gel electrode 200. Further, it can be confirmed that the amount of change in the contact impedance of the conductive fabric 1 due to the change in pressure is smaller than the amount of change in the contact impedance of the conductive fabric 100 and the amount of change in the contact impedance of the gel electrode 200.
図８は、図７と同様に、導電性生地１に圧力が加えられた場合の接触インピーダンスを示す図である。図８は、第２被験者が導電性生地１、導電性生地１００及びゲル付電極２００を装着した場合の接触インピーダンスを示す図である。図８においても、図７に示した結果に見られた傾向と同様の傾向がみられる。図８に示す結果においては、導電性生地１の接触インピーダンスがゲル付電極２００の接触インピーダンスよりも高いが、圧力の変化に伴う導電性生地１の接触インピーダンスの変化量が、導電性生地１００の接触インピーダンスの変化量、及びゲル付電極２００の接触インピーダンスの変化量よりも小さいという点では、図７に示した例と同じである。 FIG. 8 is a diagram showing the contact impedance when pressure is applied to the conductive fabric 1 as in FIG. 7. FIG. 8 is a diagram showing the contact impedance when the second subject wears the conductive fabric 1, the conductive fabric 100, and the electrode with gel 200. In FIG. 8, a tendency similar to the tendency seen in the result shown in FIG. 7 can be seen. In the results shown in FIG. 8, the contact impedance of the conductive fabric 1 is higher than the contact impedance of the electrode 200 with gel, but the amount of change in the contact impedance of the conductive fabric 1 with the change in pressure is that of the conductive fabric 100. It is the same as the example shown in FIG. 7 in that it is smaller than the amount of change in the contact impedance and the amount of change in the contact impedance of the gel electrode 200.
（実験２）
導電性生地１に外力が加わった際の接触インピーダンスの変動量を確認するための実験を行った。図５に示したように、２つの導電性生地１を皮膚の表面に接触された状態で加振機により振動を与えている間の接触インピーダンスの変動量を測定した。(Experiment 2)
An experiment was conducted to confirm the amount of fluctuation in the contact impedance when an external force was applied to the conductive fabric 1. As shown in FIG. 5, the amount of fluctuation in the contact impedance while the two conductive fabrics 1 were vibrated by the vibrator in a state of being in contact with the surface of the skin was measured.
測定条件は以下のとおりである。
・印加電圧：１．０Ｖ
・印加電圧の周波数：５０Ｈｚ
・２つの導電性生地１の配置間隔：１０ｃｍ
・振動周波数：３ＨｚThe measurement conditions are as follows.
-Applied voltage: 1.0V
・ Frequency of applied voltage: 50Hz
-Arrangement spacing of two conductive fabrics 1: 10 cm
・ Vibration frequency: 3Hz
図９は、実験に用いた導電性生地１（１ａ，１ｂ）を貼り付けた装着具５と、導電性生地１００（１００ａ，１００ｂ）を貼り付けた装着具５００とを示す写真である。被験者１名の上腕部に装着具５及び装着具５００のいずれかを装着した状態で、振動させながら電圧を印加した状態での接触インピーダンスを測定した。導電性生地１及び導電性生地１００が乾燥した状態と、霧吹きにより水を噴霧することにより湿らせた状態とで測定した。 FIG. 9 is a photograph showing the fitting 5 to which the conductive cloth 1 (1a, 1b) used in the experiment is attached and the fitting 500 to which the conductive cloth 100 (100a, 100b) is attached. The contact impedance was measured in a state where either the mounting tool 5 or the mounting tool 500 was attached to the upper arm of one subject and a voltage was applied while vibrating. The measurement was carried out in a state where the conductive fabric 1 and the conductive fabric 100 were dried and in a state where they were moistened by spraying water by spraying.
図１０は、乾燥した状態の導電性生地１及び導電性生地１００の接触インピーダンスを示す図である。図１０（ａ）は、乾燥した状態の導電性生地１００の接触インピーダンスを示しており、図１０（ｂ）は、乾燥した状態の導電性生地１の接触インピーダンスを示している。図１０に示す結果は、接触インピーダンスのドリフトの影響が表れないように、カットオフ周波数０．５Ｈｚのハイパスフィルタを用いて低周波成分を除去している。 FIG. 10 is a diagram showing the contact impedance of the conductive fabric 1 and the conductive fabric 100 in a dry state. FIG. 10A shows the contact impedance of the conductive fabric 100 in the dry state, and FIG. 10B shows the contact impedance of the conductive fabric 1 in the dry state. In the result shown in FIG. 10, low frequency components are removed by using a high-pass filter having a cutoff frequency of 0.5 Hz so that the influence of the drift of the contact impedance does not appear.
図１０（ａ）と図１０（ｂ）とを比較すると、図１０（ａ）に示す従来の導電性生地１００の接触インピーダンスは、約−１１００００Ωから＋８００００Ωの範囲で変動しているのに対して、図１０（ｂ）に示す本実施形態に係る導電性生地１の接触インピーダンスは、約−１４００Ωから＋１５００Ωの範囲で変動しており、導電性生地１の接触インピーダンスの変動量が大幅に小さいことを確認できた。 Comparing FIG. 10 (a) and FIG. 10 (b), the contact impedance of the conventional conductive fabric 100 shown in FIG. 10 (a) fluctuates in the range of about -110,000 Ω to + 80,000 Ω. The contact impedance of the conductive fabric 1 according to the present embodiment shown in FIG. 10B fluctuates in the range of about -1400Ω to + 1500Ω, and the fluctuation amount of the contact impedance of the conductive fabric 1 is significantly small. I was able to confirm.
図１１は、湿った状態の導電性生地１及び導電性生地１００の接触インピーダンスを示す図である。図１１（ａ）は、湿った状態の導電性生地１００の接触インピーダンスを示しており、図１１（ｂ）は、湿った状態の導電性生地１の接触インピーダンスを示している。図１０と同様に、図１１に示す結果は、接触インピーダンスのドリフトの影響が表れないように、カットオフ周波数０．５Ｈｚのハイパスフィルタを用いて低周波成分を除去している。 FIG. 11 is a diagram showing the contact impedance of the conductive fabric 1 and the conductive fabric 100 in a wet state. FIG. 11A shows the contact impedance of the conductive fabric 100 in a wet state, and FIG. 11B shows the contact impedance of the conductive fabric 1 in a wet state. Similar to FIG. 10, in the result shown in FIG. 11, low frequency components are removed by using a high-pass filter having a cutoff frequency of 0.5 Hz so that the influence of the drift of the contact impedance does not appear.
図１１（ａ）と図１１（ｂ）とを比較すると、図１１（ａ）に示す従来の導電性生地１００の接触インピーダンスは、約−１６０００Ωから＋１２０００Ωの範囲で変動しているのに対して、図１１（ｂ）に示す本実施形態に係る導電性生地１の接触インピーダンスは、約−１１Ωから＋１３Ωの範囲で変動しており、導電性生地１の接触インピーダンスの変動量が、導電性生地１００の接触インピーダンスの変動量の約１０００分の１になっていることを確認できた。このように、本実施形態に係る導電性生地１は、体動による接触インピーダンスの変動量が極めて小さいので、人体に装着して生体信号を測定したり人体に電気的刺激を与えたりする用途に好適である。 Comparing FIG. 11 (a) and FIG. 11 (b), the contact impedance of the conventional conductive fabric 100 shown in FIG. 11 (a) fluctuates in the range of about -16000 Ω to +12000 Ω. The contact impedance of the conductive fabric 1 according to the present embodiment shown in FIG. 11B varies in the range of about -11Ω to + 13Ω, and the fluctuation amount of the contact impedance of the conductive fabric 1 is the conductive fabric. It was confirmed that the fluctuation amount of the contact impedance of 100 was about 1/1000. As described above, since the conductive fabric 1 according to the present embodiment has an extremely small amount of fluctuation in contact impedance due to body movement, it is used for mounting on a human body to measure biological signals or to give an electrical stimulus to the human body. It is suitable.
［変形例］
以上の説明においては、第２編糸１２１及び連結編糸１３１が第１編糸１１１と同一の導電性繊維２により構成される場合を例示したが、第２編糸１２１及び連結編糸１３１は、第１編糸１１１と異なる糸により構成されていてもよい。例えば、第１編糸１１１の断面の直径が、第２編糸１２１の断面又は連結編糸１３１の断面の直径よりも小さくなるように構成されていてもよい。このようにすることで、第１編糸１１１が皮膚の表面の凹凸に合わせて曲がりやすくなり、第１層１１が皮膚に密着しやすくなる。その結果、皮膚と導電性生地１との間のインピーダンスを低下させることが可能になる。[Modification example]
In the above description, the case where the second knitting yarn 121 and the connecting knitting yarn 131 are composed of the same conductive fibers 2 as the first knitting yarn 111 is illustrated, but the second knitting yarn 121 and the connecting knitting yarn 131 are , It may be composed of a yarn different from the first knitting yarn 111. For example, the diameter of the cross section of the first knitting yarn 111 may be smaller than the diameter of the cross section of the second knitting yarn 121 or the cross section of the connecting knitting yarn 131. By doing so, the first knitting yarn 111 is easily bent according to the unevenness of the surface of the skin, and the first layer 11 is easily adhered to the skin. As a result, it becomes possible to reduce the impedance between the skin and the conductive fabric 1.
また、第２編糸１２１及び連結編糸１３１の少なくともいずれかとして、ウーリー加工糸以外の糸が用いられてもよい。第２層１２がウーリー加工糸以外の糸で構成されていることで、第２層１２を測定機に接続するためのコネクタを接着シールで第２層１２に貼り付ける場合の接着力を高めることが可能になる。また、第２編糸１２１及び連結編糸１３１の少なくともいずれかが非導電性の糸であってもよい。 Further, as at least one of the second knitting yarn 121 and the connecting knitting yarn 131, a yarn other than the woolly processed yarn may be used. Since the second layer 12 is composed of a thread other than the woolly processed thread, the adhesive force when the connector for connecting the second layer 12 to the measuring machine is attached to the second layer 12 with an adhesive sticker is enhanced. Becomes possible. Further, at least one of the second knitting yarn 121 and the connecting knitting yarn 131 may be a non-conductive yarn.
また、以上の説明においては、導電性繊維２が銀メッキされている例を示したが、導電性繊維２は、銀以外の金属がメッキされた繊維であってもよい。また、導電性繊維２は、メッキされておらず、金属の粒子が表面及び内部に含まれた繊維であってもよい。例えば、導電性繊維２は、カーボンファイバー糸、導電性インクを染色した糸、又はカーボン粒子を糸に絡めた糸であってもよい。 Further, in the above description, the example in which the conductive fiber 2 is silver-plated is shown, but the conductive fiber 2 may be a fiber plated with a metal other than silver. Further, the conductive fiber 2 may be a fiber that is not plated and contains metal particles on the surface and inside. For example, the conductive fiber 2 may be a carbon fiber thread, a thread dyed with conductive ink, or a thread in which carbon particles are entwined with the thread.
以上、本発明を実施の形態を用いて説明したが、本発明の技術的範囲は上記実施の形態に記載の範囲には限定されず、その要旨の範囲内で種々の変形及び変更が可能である。例えば、装置の分散・統合の具体的な実施の形態は、以上の実施の形態に限られず、その全部又は一部について、任意の単位で機能的又は物理的に分散・統合して構成することができる。また、複数の実施の形態の任意の組み合わせによって生じる新たな実施の形態も、本発明の実施の形態に含まれる。組み合わせによって生じる新たな実施の形態の効果は、もとの実施の形態の効果を合わせ持つ。 Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist. is there. For example, the specific embodiment of the distribution / integration of the device is not limited to the above embodiment, and all or a part thereof may be functionally or physically dispersed / integrated in any unit. Can be done. Also included in the embodiments of the present invention are new embodiments resulting from any combination of the plurality of embodiments. The effect of the new embodiment produced by the combination has the effect of the original embodiment together.
１ 導電性生地
２ 導電性繊維
３ 電圧源
４ インピーダンス測定機
５ 装着具
１１ 第１層
１２ 第２層
１３ 連結層
２１ 構成繊維
１００ 導電性生地
１１１ 第１編糸
１２１ 第２編糸
１３１ 連結編糸
２００ ゲル付電極
５００ 装着具1 Conductive fabric 2 Conductive fiber 3 Voltage source 4 Impedance measuring machine 5 Mounting tool 11 1st layer 12 2nd layer 13 Connecting layer 21 Constituent fiber 100 Conductive fabric 111 1st knitting yarn 121 2nd knitting yarn 131 Connecting knitting yarn 200 Electrode with gel 500 Mounting tool
Claims (9)
第２編糸を含む第２層と、
前記第１編糸と前記第２編糸とを連結する連結編糸を含み、かつ前記第１層と前記第２層との間に形成された連結層と、
を有し、
前記複数の構成繊維の少なくとも一部の構成繊維は、長手方向の異なる複数の位置において異なる一以上の他の構成繊維に接触していることを特徴とする導電性生地。A first layer containing a first knitting yarn whose surface is composed of a plurality of constituent fibers having conductivity,
The second layer containing the second knitting yarn and
A connecting layer that includes a connecting knitting yarn that connects the first knitting yarn and the second knitting yarn and is formed between the first layer and the second layer.
Have,
A conductive fabric, characterized in that at least a part of the constituent fibers of the plurality of constituent fibers is in contact with one or more other constituent fibers that are different at a plurality of positions different in the longitudinal direction.
請求項１に記載の導電性生地。The plurality of constituent fibers constituting the first knitting yarn come into contact with other constituent fibers different from the other constituent fibers that come into contact with the conductive fabric in a state where an external force is applied and the external force is not applied. Characterized by that
The conductive fabric according to claim 1.
請求項１又は２に記載の導電性生地。The impedance between the two points in the first layer is characterized by decreasing as the ambient humidity increases.
The conductive fabric according to claim 1 or 2.
請求項１から３のいずれか一項に記載の導電性生地。The connecting knitting yarn is a conductive woolly processed yarn, and the impedance when an external force is applied in the direction of bringing the first layer and the second layer closer to each other is higher than the impedance when the external force is not applied. Characterized by low,
The conductive fabric according to any one of claims 1 to 3.
請求項１から４のいずれか一項に記載の導電性生地。The connecting knitting yarn is a conductive woolly processed yarn, and the length of the connecting knitting yarn in a linearly stretched state is not applied with an external force in a direction in which the first layer and the second layer are brought closer to each other. It is characterized in that a plurality of adjacent connecting knitting yarns are in contact with each other in a state in which the distance between the first layer and the second layer in the state is longer than that of the second layer and no external force is applied.
The conductive fabric according to any one of claims 1 to 4.
請求項１から５のいずれか一項に記載の導電性生地。The diameter of the cross section of the first knitting yarn is smaller than the diameter of the cross section of the connecting knitting yarn.
The conductive fabric according to any one of claims 1 to 5.
請求項１から６のいずれか一項に記載の導電性生地。It is characterized in that the elongation rate in the wale direction is larger than the elongation rate in the course direction.
The conductive fabric according to any one of claims 1 to 6.
請求項１から７のいずれか一項に記載の導電性生地。Among the plurality of constituent fibers, the constituent fibers to which a current of a predetermined size or more has flowed are blown.
The conductive fabric according to any one of claims 1 to 7.
第２編糸を含む第２層と、
前記第１編糸と前記第２編糸とを連結する連結編糸を含み、かつ前記第１層と前記第２層との間に形成された連結層と、
を有する導電性生地の製造方法であって、
表面が導電性を有する複数の構成繊維がウーリー加工され、前記複数の構成繊維の少なくとも一部の構成繊維が、長手方向の異なる複数の位置において異なる一以上の他の構成繊維に接触している前記複数の構成繊維により構成される前記第１編糸を作成する工程と、
前記第２編糸を作成する工程と、
前記連結編糸を作成する工程と、
前記第１編糸及び前記第２編糸を前記連結編糸で連結する工程と、
を有する導電性生地の製造方法。The first layer containing the first knitting yarn and
The second layer containing the second knitting yarn and
A connecting layer that includes a connecting knitting yarn that connects the first knitting yarn and the second knitting yarn and is formed between the first layer and the second layer.
It is a method of manufacturing a conductive fabric having
A plurality of constituent fibers having a conductive surface are woolly processed, and at least a part of the constituent fibers of the plurality of constituent fibers is in contact with one or more other constituent fibers that are different at a plurality of positions different in the longitudinal direction. The step of producing the first knitting yarn composed of the plurality of constituent fibers and
The process of creating the second knitting yarn and
The process of creating the connected knitting yarn and
The step of connecting the first knitting yarn and the second knitting yarn with the connecting knitting yarn, and
A method for producing a conductive fabric having.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166470A (en) * | 1993-12-10 | 1995-06-27 | Unitika Ltd | Production of antistatic water-repellent knitted fabric |
| JP2007529805A (en) * | 2004-03-18 | 2007-10-25 | エレクセン・リミテッド | Sensor response |
| JP2012031550A (en) * | 2010-07-09 | 2012-02-16 | Asahi Kasei Fibers Corp | Conductive three-layer structured fabric |
| JP2013178895A (en) * | 2012-02-28 | 2013-09-09 | Nissan Motor Co Ltd | Cloth-like pressure sensor heater |
| JP2015093137A (en) * | 2013-11-14 | 2015-05-18 | 竹中繊維株式会社 | Cloth with fiber electrode, method for manufacturing the same, and electrical impedance measuring belt |
-
2018
- 2018-11-01 WO PCT/JP2018/040680 patent/WO2019130808A1/en active Application Filing
- 2018-11-01 JP JP2019562801A patent/JP7281415B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07166470A (en) * | 1993-12-10 | 1995-06-27 | Unitika Ltd | Production of antistatic water-repellent knitted fabric |
| JP2007529805A (en) * | 2004-03-18 | 2007-10-25 | エレクセン・リミテッド | Sensor response |
| JP2012031550A (en) * | 2010-07-09 | 2012-02-16 | Asahi Kasei Fibers Corp | Conductive three-layer structured fabric |
| JP2013178895A (en) * | 2012-02-28 | 2013-09-09 | Nissan Motor Co Ltd | Cloth-like pressure sensor heater |
| JP2015093137A (en) * | 2013-11-14 | 2015-05-18 | 竹中繊維株式会社 | Cloth with fiber electrode, method for manufacturing the same, and electrical impedance measuring belt |
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