WO2018139483A1 - 伸縮性起毛電極及びその製造方法 - Google Patents
伸縮性起毛電極及びその製造方法 Download PDFInfo
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- WO2018139483A1 WO2018139483A1 PCT/JP2018/002107 JP2018002107W WO2018139483A1 WO 2018139483 A1 WO2018139483 A1 WO 2018139483A1 JP 2018002107 W JP2018002107 W JP 2018002107W WO 2018139483 A1 WO2018139483 A1 WO 2018139483A1
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- electrode
- resin layer
- conductive
- insertion portion
- conductive fibers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
- A61B5/268—Bioelectric electrodes therefor characterised by the electrode materials containing conductive polymers, e.g. PEDOT:PSS polymers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
- A61B2562/0215—Silver or silver chloride containing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/12—Manufacturing methods specially adapted for producing sensors for in-vivo measurements
- A61B2562/125—Manufacturing methods specially adapted for producing sensors for in-vivo measurements characterised by the manufacture of electrodes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
- A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/18—Shielding or protection of sensors from environmental influences, e.g. protection from mechanical damage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a brushed electrode in which conductive fibers are raised on the surface of a sheet body and a method for manufacturing the same, and in particular, it can be used for a biological electrode that is pressed against the body and collects biological signals and has elasticity.
- the present invention relates to a stretchable raised electrode and a method for producing the same.
- a flexible electrode that can be pressed against a surface of an uneven object to allow a current to flow between the object and the object.
- a biological electrode as a measurement electrode that is pressed against the body and collects biological signals.
- a biological electrode such as an electrocardiogram is collected by applying a conductive gel between a body electrode of a human body and a conductive gel between the body electrodes of the human body.
- the conductive gel is used to electrically fill a space between the body portion and the biological electrode so as to reliably measure a weak current.
- an elastic or stretchable electrode base material is used so that the weak current of the living body can be collected following the surface of an uneven object without using a conductive gel, or the surface of the electrode base material is electrically conductive. It has been proposed to plant or raise natural fibers.
- Patent Document 1 discloses a bioelectrode in which a detection unit having conductivity and flexibility such as a cloth made of conductive fiber is provided around a holding unit having elasticity and thickness such as sponge. Such a bioelectrode can be installed on the inside of the clothes and deformed to improve adhesion to the living body, but does not have stretchability.
- Patent Document 2 discloses a bioelectrode in which a strip electrode made of conductive fibers is continuously integrated with a stretchable cloth member by nonwoven fabric processing, weaving processing, or knitting processing. In such a bioelectrode, the cloth member as a base material expands and contracts, but the belt-like electrode portion does not expand and contract. Therefore, it can be considered to use a conductive stretchable film as disclosed in Patent Document 3, for example, for the belt-like electrode.
- Patent Document 4 discloses a raised electrode in which a plurality of contacts made of conductive fibers are extended from a base in a raised state as a biological electrode for collecting brain waves, although it is not an electrode made of a sheet body. Yes.
- the base does not expand and contract, but the electrode expands and contracts substantially when the contact moves flexibly.
- a bioelectrode in which an electrode portion made of a metal thin film is provided on a stretchable sheet body, the sheet body can be stretched, but the electrode section does not stretch.
- a bioelectrode restricts the operation of the wearer and lacks the comfort of wearing, and is not particularly preferable as a wearable electrode.
- seat body which has a stretching property is considered.
- a current collector that collects current from a large number of brushed parts is provided along the surface of the sheet body, it should follow the expansion and contraction of the sheet body as well as electrical and mechanical coupling with the conductive fibers. The structure for this was not easy.
- the present invention has been made in view of the situation as described above, and the object of the present invention is to be used as a bioelectrode or the like for collecting biosignals by being pressed against the body, and has elasticity.
- An object of the present invention is to provide a stretchable brushed electrode and a method for producing the same.
- the raised electrode according to the present invention is a raised electrode in which the surface of a stretchable sheet body is raised, and a resin layer provided to be stretchable following the surface of the sheet body, and the resin layer A plurality of s fibers each having an insertion portion into which one end portion is inserted, and the adjacent conductive fibers are in electrical contact with each other at a non-insertion portion to the resin layer, and the conductive fibers
- the conductive fiber is provided to the resin layer at a density such that the conductivity of the electrode region of the given sheet body is in-plane isotropic.
- the conductivity as an electrode can be obtained even if the resin layer does not have high conductivity, the range of selection of the material of the resin layer corresponding to the sheet body can be widened, and the conductive fibers can be applied. While being able to do easily, the selection range of a provision form can be expanded.
- the conductive fibers having adjacent contacts may be inclined with respect to the sheet body so as to maintain the contacts by expansion and contraction of the sheet body. According to this invention, stable conductivity can be obtained.
- the conductive fiber may be characterized in that the length of the insertion portion is smaller than the non-insertion portion.
- the non-insertion portion of the conductive fiber may be twice or more as long as the insertion portion.
- the length of the conductive fiber may be 1 mm or less. According to this invention, it functions stably as an electrode without being affected by the expansion and contraction of the sheet body.
- the conductive fiber may be a needle-like body in which a conductive plating is provided on a surface of the fiber. According to this invention, it functions stably as an electrode without being affected by the expansion and contraction of the sheet body.
- the resin layer may be an insulator. According to this invention, the range of selection of the material of the resin layer corresponding to the sheet body can be widened, and the conductive fiber can be easily applied, and the range of selection of the application form can be expanded.
- the method for producing a raised electrode according to the present invention is a method for producing a raised electrode in which the surface of a stretchable sheet body is raised, and is provided so as to be stretchable following the surface of the sheet body.
- a raising step of raising one end portion of the adhesive layer to fly and a raising step of curing the adhesive layer to give the resin layer, and the adjacent conductive fibers are the resin.
- Giving the conductive fibers to such a density that they are in electrical contact at the non-insertion portion of the layer and the conductivity of the electrode region of the sheet body provided with the conductive fibers is in-plane isotropic. It is characterized by.
- the conductivity as an electrode can be obtained even if the resin layer does not have high conductivity, the range of selection of the material of the resin layer corresponding to the sheet body can be widened, and the conductive fibers can be applied. While being able to do easily, the selection range of a provision form can be expanded.
- the raising step includes placing the sheet body on an earthed electrode and applying a voltage between the electrostatic spray gun and the conductive fibers charged from the electrostatic spray gun. It may be characterized by including a spraying step of spraying toward the sheet body. According to this invention, raising of the conductive fiber can be efficiently provided.
- the spraying step may be characterized in that the voltage is adjusted and the length of the insertion portion is made smaller than the non-insertion portion of the conductive fiber. Further, the spraying step may be characterized in that the non-insertion portion of the conductive fiber is twice or more as long as the insertion portion. According to this invention, a stable electrode can be obtained without being affected by the expansion and contraction of the sheet body.
- a brushed electrode as one embodiment according to the present invention will be described in detail with reference to FIG.
- the brushed electrode 10 is implanted so as to insert a base material 1 made of a stretchable sheet body, a resin layer 2 bonded to the surface thereof, and one end portion into the resin layer 2.
- the conductive fibers 3 are in electrical contact with each other at the non-insertion portion where adjacent fibers are not inserted into the resin layer 2, and the conductivity of the electrode region formed in the raised electrode 10 is in-plane. It is given at a density that is isotropic.
- the electrode region is a region in which the non-inserted portion of the conductive fiber 3 is exposed on the main surface side of the raised electrode 10, for example, indicated by x in the horizontal direction and z in the height direction. It is the area
- the base material 1 is not particularly limited as long as it is a stretchable sheet body, for example, a fabric made of synthetic fibers such as nylon or polyester, a sheet made of a thermosetting resin such as urethane, or a synthetic rubber such as butyl rubber. A sheet or a sheet made of a synthetic polymer such as silicone can be used. According to a method of spraying the conductive fibers 3 by an electrostatic spray method as will be described later, the substrate 1 can be insulative.
- the resin layer 2 is a layer made of an adhesive capable of providing the conductive fibers 3 on the surface of the substrate 1 as described above.
- an emulsion-based adhesive such as a silylated urethane-based elastic adhesive or an acrylic emulsion Etc. can be used.
- the resin layer 2 is not particularly required to be electrically conductive, and is a material suitable for obtaining the electrode region made of the conductive fibers 3 as described above, for example, a material having high adhesion to the base material 1. Can be selected regardless of the conductivity. For example, it is preferable to select an insulating material as the resin layer 2 together with the base material 1 because the range of material selection can be expanded compared to the conductive material.
- the conductive fiber 3 for example, carbon nanofibers, metal fibers, chemical fibers coated with a conductive polymer or plated with metal can be used.
- the wire diameter and fiber length of the conductive fiber 3 are appropriately selected so that the above-described application form can be obtained.
- the conductive fiber 3 has a wire diameter of, for example, 20 ⁇ m or less and a fiber length. It is preferable that it is a short fiber used as the acicular body made into 0.1 mm or more and 0.5 mm or less.
- the conductive fiber 3 has a wire diameter and a fiber so that the above-described application form can be obtained and the electrode can stably function as an electrode against expansion and contraction required for the raised electrode 10.
- the number per unit area and the inclination with respect to the base material 1 are set according to the length.
- an adhesive 2a for forming a resin layer (adhesive layer) 2 is applied on the substrate 1, and the electrode region is patterned.
- a mask 5 having an opening 5a to be an electrode pattern is placed, and an adhesive 2a to be a resin layer 2 is spread from the squeegee 6 thereon.
- the adhesive 2a has a viscosity that does not cause bleeding on the substrate 1, for example, 10 to 400 Pa ⁇ s.
- an electrode pattern can be formed with the adhesive 2a.
- the thickness of the mask 5, that is, the thickness of the resin layer 2 by the adhesive 2 a formed on the substrate 1 can be used to implant the conductive fibers 3, and is preferably 10 to 1000 ⁇ m, for example. is there.
- other methods such as a screen printing method, a stencil printing method, a dispensing method, a spray coating method, and an ink jet method can be used.
- conductive fibers 3 are sprayed by electrostatic spraying. That is, the conductive fiber 3 charged from the electrostatic spray gun 12 is placed on the substrate 1 while the substrate 1 is placed on the grounded electrode 11 and a voltage is applied to the electrostatic spray gun 12. Spray. The conductive fiber 3 flies and is drawn to the electrode 11 along the electric force line 13. As a result, the conductive fiber 3 is implanted in the adhesive 2a having a thickness so that one end portion is inserted by the initial velocity by spraying and electrostatic force and is raised, or in the portion other than the electrode pattern of the substrate 1 Get down directly on.
- the length of the insertion portion of the conductive fiber 3 into the adhesive 2 a can be controlled by adjusting the voltage between the electrode 11 and the electrostatic spray gun 12.
- Other known methods such as spray coating and electrostatic flocking may be used as long as one end of the conductive fiber 3 can be inserted into the resin layer 2.
- the adhesive 2 a is cured by drying or the like to form a resin layer 2, and the conductive fibers 3 that have jumped directly onto the base material 1 and fell directly on the substrate 1 are collected by a vacuum cleaner 14. Remove by suction. You may remove using a weak adhesion roller. As a result, the raised electrode 10 can be obtained in which the conductive fiber 3 is implanted on the electrode pattern to form an electrode region.
- an insulating film may be formed on the conductive fiber 3 in a portion that is not used as an electrode region to form a wiring region. That is, an insulating film is formed by press-bonding an insulating sheet or applying and drying an insulating paste.
- an insulating film As such an insulating film, urethane elastomers, silicone resins, and butyl rubber materials that are rich in elasticity and flexibility are suitable.
- the conductive fiber 3 having one end inserted into the resin layer 2 in the initial state is electrically connected by a contact C at the non-insertion portion.
- the conductive fiber 3 is inclined in the direction of reducing the thickness of the raised electrode 10. That is, the conductive fiber 3 has its other end side closer to the resin layer 2, in other words, the angle with respect to the main surface of the substrate 1 (see FIG. 1) is decreased and the inclination thereof is increased in the sleeping direction, Reduce the thickness of the electrode region. Even in this case, the contact C can be maintained at a position closer to the resin layer 2 and electrical connection can be maintained.
- the conductive fibers 3 are in contact with each other in a three-dimensional manner, and several adjacent conductive fibers 3 are provided at a plurality of locations so as to give in-plane isotropic electrical characteristics. It is preferable to exist at a high density so as to have the following contact C. According to this, both the base material 1 and the resin layer 2 can be insulating.
- the insertion part of the conductive fibers 3 which had the contact C was included.
- the distance is away.
- the distance d2 in the stretching direction between the deepest portion and the outermost surface portion of the insertion portion of the conductive fiber 3 becomes longer than the distance d1 before being stretched as the stretchable resin layer 2 stretches.
- the conductive fiber 3 is inclined so as to reduce the angle with respect to the main surface of the substrate 1.
- the contact C can be maintained on the more distal end side (the other end side) of the conductive fiber 3.
- the density of the conductive fibers 3 in the electrode region tends to be reduced by deformation in the stretching direction
- the decrease in density can be offset by the deformation that thins the electrode region in the thickness direction. Easy to maintain electrical connection in the area.
- the change in the angle of the conductive fiber 3 accompanying the elongation of the resin layer 2 can be obtained when the insertion portion of the conductive fiber 3 is sufficiently smaller than the non-insertion portion.
- the brushed electrode 10 having elasticity can be used as a bioelectrode for collecting biosignals by being pressed against the body. That is, the raised electrode 10 forms a three-dimensional network in which the conductive fibers 3 are electrically connected to each other. Even if it is deformed, it can maintain in-plane isotropic conductivity and is suitable for use as a bioelectrode.
- the raising electrode 10 can also make the angle with respect to the main surface of the base material 1 of the conductive fiber 3 small.
- the raised electrode 10 (see FIG. 1) with the same angle increased well following deformation against pressing, but by reducing the angle, the raised electrode 10 is electrically conductive with respect to extension in the direction along the main surface of the substrate 1. Can be easily maintained.
- the brushed electrode 10 can be formed by laminating a resin layer 2 and an electrode region layer made of conductive fibers 3.
- the resin layer 2 ′ overlapped on the conductive fiber 3 includes an electrode region having conductivity also in the resin layer 2 ′.
- FIGS. 5 (a1) and (b1) two types of brushed electrodes 10a and 10b were produced. That is, as shown in the cross-sectional photographs and cross-sectional views of FIGS. 5 (a2), (a3), (b2) and (b3), the brushed electrode 10a having a small angle of the conductive fibers 3 with respect to the main surface of the substrate 1; A brushed electrode 10b having such a large angle was produced.
- the conductive fiber 3 a silver-plated fiber having a linear shape of 17 ⁇ m and a length of 0.5 mm was used.
- the conductive rubber G is pressed onto the brushed electrodes 10a and 10b, and the electrical resistance between the brushed electrodes 10a and 10b and the conductive rubber G is measured when sliding on the electrodes. did.
- coated and dried Ag paste to the base material 1 as the comparative example 1, and using the copper plate electrode as the comparative example 2 and pressing the conductive rubber G in the same manner and sliding the electrode is used. It was measured.
- the electric resistance was smaller than that in Comparative Examples 1 and 2, and the change was small and the change was isotropically continuous in the plane. This is probably because the raised electrodes 10a and 10b are deformed following the shape of the tip of the pressed conductive rubber G to obtain a large number of contact points with the conductive rubber G, thereby widening the contact area.
- the conductive rubber G was also deformed with good followability by the deformation of the conductive fiber 3 so that the number of contact points with the conductive rubber G was maintained.
- the electric resistance of the raising electrode 10b with a large angle of the conductive fiber 3 with respect to the main surface of the base material 1 was smaller than the raising electrode 10a with a small angle. As described above, it is considered that increasing the angle of the conductive fiber 3 better follows the deformation with respect to the pressing.
- Comparative Example 1 Ag paste electrode
- Comparative Example 2 copper plate
- the followability to the shape change in the thickness direction is poor, and the contact area with the pressed conductive rubber G is reduced.
- the electrical resistance is considered to be discontinuously greatly changed by further reducing the small contact area.
- the brushed electrodes 10a and 10b and the Ag paste electrode of Comparative Example 1 were each stretched 1.5 times in the direction along the main surface, and the expansion / contraction operation was repeatedly performed.
- the electrical resistance of the electrode region in the direction along the line was measured.
- Comparative Example 1 the electrical resistance changed greatly and discontinuously by the expansion / contraction operation. It can be seen that the electrical resistance of the Ag paste electrode increases when it is stretched.
- the raised electrodes 10a and 10b both have small changes in electrical resistance due to the expansion / contraction operation and are continuous changes, and it can be seen that the conductivity is well maintained against the extension.
- the change in electrical resistance of the raised electrode 10a having a smaller angle of the conductive fiber 3 with respect to the main surface of the substrate 1 was smaller than that of the raised electrode 10b having a larger angle.
- reducing the angle of the conductive fibers 3 makes it easier to maintain the conductivity against the extension in the direction along the main surface of the substrate 1.
- washing was repeated for each of the raised electrodes 10a and 10b and the Ag paste electrode of Comparative Example 1, and the electrical resistance of the electrode region in the direction along the main surface with respect to the number of washings was measured.
- the electrical resistance was greatly increased by washing only three times. It is considered that the Ag paste was divided in the direction along the main surface due to a shape change such as bending of the electrode during the cleaning, and further partially dropped off by the water flow.
- the raised electrodes 10a and 10b a large change in electrical resistance due to cleaning was not observed at least 10 times. It is considered that the followability of the resin layer 2 with respect to deformation such as bending is high, and that the conductive fibers 3 are not easily dropped off by washing.
- the brushed electrodes 10a and 10b can better follow deformation such as pressing and stretching, maintain electrical conductivity, and are excellent as biological electrodes.
- the brushed electrode 20 was manufactured by the manufacturing method described above.
- three electrode regions 21 made of conductive fibers 3 are formed in a square shape above the paper surface, and wiring regions 22 made of conductive fibers 3 extending downward from each of the electrode regions 21 are formed.
- the wiring region 22 is a region where an insulating coating made of an insulator is formed from above the region where the conductive fibers 3 are implanted.
- a terminal 23 is connected to the lower end of the wiring region 22.
- the raising electrode 30 shown to Fig.10 (a) is manufactured using screen printing and electrostatic flocking.
- the adhesive 2a was applied to the substrate 1 by screen printing (see FIG. 2), and the conductive fibers 3 were implanted by the electrostatic straight hair method.
- an acrylic emulsion (trade name: Boncoat W-386) manufactured by DIC Corporation was used.
- the mesh 31 used for screen printing is a 3D mesh having a mesh count of 200 made of fibers with a wire diameter of 40 ⁇ m and a thickness of 155 ⁇ m so that the adhesive 2a can be applied thickly.
- the screen plate was obtained by applying a photosensitive emulsion to the mesh 31 to a thickness of 50 ⁇ m, drying, attaching a positive film with a screen mask manufactured by Mitani Micronics Co., Ltd. shown in FIG. The screen plate was coated with a liquid so that the adhesive 2a did not remain.
- the conductive fiber 3 is The brushed electrode 30 having the above-described application form was obtained.
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Abstract
Description
次に、本発明による1つの実施例として、起毛工程に噴霧工程を利用した起毛電極10の製造方法について図2を用いて説明する。
次に、生体電極として起毛電極10を使用した場合に、伸縮や変形に追従し、導電性を維持する原理について、図3及び図4を用いて説明する。
次に、起毛電極10を作製して評価試験を行った結果について、図5乃至図8を用いて説明する。
図9(a)に示すように、上記した製造方法によって起毛電極20を製造した。起毛電極20は紙面上方に導電性繊維3による電極領域21が方形に3つ形成され、電極領域21のそれぞれから下方に向けて延びる導電性繊維3による配線領域22が形成される。配線領域22は、上記したように、導電性繊維3の植設された領域の上から絶縁体からなる絶縁被膜を形成された領域である。配線領域22の下端には、端子23が接続されている。
図10(a)に示す起毛電極30は、スクリーン印刷及び静電植毛を用いて製造されたものである。スクリーン印刷によって基材1に接着剤2aを塗布し(図2参照)、静電直毛法によって導電性繊維3を植設した。接着剤2aとしては、DIC株式会社製のアクリルエマルジョン(商品名:ボンコート W-386)を用いた。
2 樹脂層
3 導電性繊維
10、10a、10b、20、30 起毛電極
Claims (11)
- 伸縮性を有するシート体の表面を起毛させた起毛電極であって、
前記シート体の表面に沿って追従して伸縮可能に与えられた樹脂層と、前記樹脂層にその一端部を挿入された挿入部を有する複数の導電性繊維と、を含み、
隣接する前記導電性繊維同士が前記樹脂層への非挿入部において電気的に接触し、且つ、前記導電性繊維の与えられた前記シート体の電極領域の導電率が面内等方となるような密度で前記樹脂層に前記導電性繊維が与えられていることを特徴とする起毛電極。 - 隣接し接点を有する前記導電性繊維同士は前記シート体の伸縮で前記接点を維持するよう前記シート体に対して傾斜することを特徴とする請求項1記載の起毛電極。
- 前記導電性繊維は、前記非挿入部に対して前記挿入部の長さを小とすることを特徴とする請求項2記載の起毛電極。
- 前記導電性繊維の前記非挿入部は、前記挿入部の2倍以上の長さであることを特徴とする請求項3記載の起毛電極。
- 前記導電性繊維の長さが1mm以下であることを特徴とする請求項3記載の起毛電極。
- 前記導電性繊維は繊維の表面に導電性のメッキを与えられた針状体であることを特徴とする請求項3記載の起毛電極。
- 前記樹脂層は絶縁体であることを特徴とする請求項1記載の起毛電極。
- 伸縮性を有するシート体の表面を起毛させた起毛電極の製造方法であって、
前記シート体の表面に沿って追従して伸縮可能に与えられた樹脂層と、前記樹脂層にその一端部を挿入された挿入部を有する複数の導電性繊維と、を含み、
前記シート体の前記表面に接着層を与える工程と、前記表面に向けて前記導電性繊維を飛翔させ前記接着層に一端部を挿入させて起毛させる起毛工程と、前記接着層を硬化させて前記樹脂層を与える硬化工程と、を含み、
隣接する前記導電性繊維同士が前記樹脂層への非挿入部において電気的に接触し、且つ、前記導電性繊維の与えられた前記シート体の電極領域の導電率が面内等方となるような密度に前記導電性繊維を与えることを特徴とする起毛電極の製造方法。 - 前記起毛工程は、前記シート体をアースした電極に載置して静電スプレーガンとの間に電圧を印加した状態で、前記静電スプレーガンから帯電した導電性繊維を前記シート体に向けて噴霧する噴霧工程を含むことを特徴とする請求項8記載の起毛電極の製造方法。
- 前記噴霧工程は、前記電圧を調整し、前記導電性繊維の前記非挿入部に対して前記挿入部の長さを小とすることを特徴とする請求項9記載の起毛電極の製造方法。
- 前記噴霧工程は、前記導電性繊維の前記非挿入部を前記挿入部の2倍以上の長さであることを特徴とする請求項10記載の起毛電極の製造方法。
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| JP2020188895A (ja) * | 2019-05-21 | 2020-11-26 | 国立研究開発法人産業技術総合研究所 | 心電シート、心電測定電極ユニット、心電電極選択評価回路、心電シートの使用方法及び心電シートの製造方法 |
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