[go: up one dir, main page]

WO2018180629A1 - Antenne, dispositif de communication sans fil, dispositif de mesure de signaux biométriques, et vêtement - Google Patents

Antenne, dispositif de communication sans fil, dispositif de mesure de signaux biométriques, et vêtement Download PDF

Info

Publication number
WO2018180629A1
WO2018180629A1 PCT/JP2018/010556 JP2018010556W WO2018180629A1 WO 2018180629 A1 WO2018180629 A1 WO 2018180629A1 JP 2018010556 W JP2018010556 W JP 2018010556W WO 2018180629 A1 WO2018180629 A1 WO 2018180629A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive
antenna
fiber structure
resin
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/010556
Other languages
English (en)
Japanese (ja)
Inventor
典子 長井
潤史 脇田
応明 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chiba University NUC
Toray Industries Inc
Original Assignee
Chiba University NUC
Toray Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chiba University NUC, Toray Industries Inc filed Critical Chiba University NUC
Priority to JP2019509302A priority Critical patent/JP6999139B2/ja
Publication of WO2018180629A1 publication Critical patent/WO2018180629A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
    • D06M13/03—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons with unsaturated hydrocarbons, e.g. alkenes, or alkynes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/63—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing sulfur in the main chain, e.g. polysulfones
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material

Definitions

  • the present invention relates to an antenna, a wireless communication device using the antenna, a biological signal measuring device, and clothes. Specifically, the present invention relates to an antenna having a conductive fiber structure in which a conductive polymer containing at least a carbon atom is supported on a fiber.
  • the wireless communication device is provided with an antenna for transmitting and receiving radio waves, and the structure of a conventional antenna is that a conductive material such as a metal foil or conductive ink is formed on an insulating substrate such as a plastic film. The thing in which the formed conductive pattern was formed is mentioned.
  • Patent Document 1 proposes an RFID (Radio Frequency IDentification) tag for an antenna in which a metal pattern is formed on an insulating cloth by vapor deposition or the like.
  • Patent Document 2 proposes an RFID including an antenna (hereinafter referred to as a cloth antenna) using a conductive cloth made of a conductive fiber such as a metal-plated fiber.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide an antenna, a wireless communication device, a biological signal measurement device, and clothes that have flexibility and do not deteriorate in performance after bending or repeated washing. To do.
  • the present inventor has considered that the above problem can be solved by supporting a conductive resin containing carbon atoms on a fiber having a specific diameter, and has reached the present invention.
  • the present invention is an antenna having a conductive fiber structure in which at least a conductive resin containing a carbon atom is supported on the surface of a fiber having a diameter of 100 nm to 1000 nm and / or a single fiber gap.
  • an antenna, a wireless communication device, a biological signal measuring device, and clothes that have flexibility and whose performance does not deteriorate after bending or repeated washing.
  • FIG. 1A is a diagram illustrating an example of an antenna of the present invention.
  • FIG. 1B is a diagram illustrating an example of the antenna of the present invention.
  • FIG. 1C is a diagram illustrating an example of the antenna of the present invention.
  • FIG. 1D is an AA cross-sectional view of the antenna of FIG. 1C.
  • FIG. 2 is a diagram illustrating an example of the antenna of the present invention.
  • FIG. 3 is a diagram illustrating an example of the antenna of the present invention.
  • FIG. 4 is a diagram for explaining an example of the antenna of the present invention.
  • FIG. 5 is a cross-sectional view showing an embodiment of the antenna of the present invention.
  • FIG. 6 is a schematic view showing a measurement system for the XZ plane radiation pattern of the antenna of the present invention.
  • FIG. 1A is a diagram illustrating an example of an antenna of the present invention.
  • FIG. 1B is a diagram illustrating an example of the antenna of the present invention.
  • FIG. 7 is a diagram showing the measurement result of the XZ plane radiation pattern of the antenna of the present invention.
  • FIG. 8 is a diagram showing a human phantom used for measurement of the antenna of the present invention.
  • FIG. 9 is a diagram showing the measurement result of the XZ plane radiation pattern of the antenna of the present invention.
  • FIG. 10 is a scanning probe microscope observation photograph of the conductive fiber structure used in the antenna of the present invention.
  • the antenna of the present invention is an antenna having a conductive fiber structure in which at least a conductive resin containing a carbon atom is supported on the surface of a fiber having a diameter of 100 nm to 1000 nm and / or a single fiber gap.
  • the fibers constituting the conductive fiber structure of the present invention include natural fibers, synthetic or semi-synthetic fibers, or mixtures thereof.
  • natural fibers include cotton and silk.
  • synthetic fibers include polyester fibers, acrylic fibers, and nylon fibers.
  • semisynthetic fibers include rayon, but are not limited thereto.
  • the fiber which comprises the electroconductive fiber structure of this invention 100 nm or more and 1000 nm or less are preferable. By setting it to 1000 nm or less, the surface area of the single fiber in the fiber structure is increased, so that the adhesion between the conductive resin and the fiber is improved. As a result, peeling of the conductive resin when the antenna is bent and performance deterioration after repeated washing can be suppressed. From the viewpoint of supporting the conductive resin on the surface and / or the single fiber gap, it is more preferably 300 nm or more and 1000 nm or less, and further preferably 500 nm or more and 1000 nm or less. The upper limit is preferably 1000 nm or less as described above, but more preferably 900 nm or less.
  • the conductive resin is supported in the gap between the single fibers constituting the fiber structure and the thickness of the fiber structure.
  • the washing durability is more excellent when the area ratio of the conductive resin existing in the region of 15 to 30 ⁇ m from the surface layer is 15% or more.
  • the area ratio is 20% or more, which makes the repeated washing durability extremely excellent.
  • the area ratio is preferably 30% from the viewpoint of flexibility.
  • the fibers constituting the conductive fiber structure of the present invention are multifilament yarns made of a thermoplastic polymer from the viewpoints of uniformity and fineness of the fineness of the fibers and the adhesion between the fibers and the conductive resin. Preferably there is.
  • the thermoplastic polymer is not particularly limited as long as it is a polymer that can be made into a fiber.
  • Polyolefin fiber mainly composed of polyethylene, polypropylene, etc., fiber for chemical fiber such as acetate imparted with thermoplasticity, and polyester, Examples thereof include, but are not limited to, polymers for synthetic fibers such as nylon.
  • it is important from the point of the moldability that it is a thermoplastic polymer represented by polyester and polyamide. Many polyesters and polyamides have a high melting point, and are more preferable.
  • the melting point of the polymer is preferably 165 ° C. or higher because the heat resistance is good.
  • PET polyethylene terephthalate
  • nylon 6 (N 6) is 220 ° C.
  • other components may be copolymerized as long as the properties of the polymer are not impaired.
  • polyester refers to terephthalic acid as the main acid component, and alkylene glycol having 2 to 6 carbon atoms, that is, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, preferably Examples include polyesters having at least one glycol selected from ethylene glycol and tetramethylene glycol as a main glycol component, particularly preferably ethylene glycol.
  • it may be a polyester in which a part of the terephthalic acid component is replaced with another bifunctional carboxylic acid component, and / or a polyester in which a part of the glycol component is replaced with a diol component other than the glycol component. May be.
  • bifunctional carboxylic acid other than terephthalic acid used here examples include isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenoxyethanedicarboxylic acid, adipic acid, sebacic acid, and 1,4-cyclohexanedicarboxylic acid.
  • examples thereof include aromatic, aliphatic and alicyclic bifunctional carboxylic acids.
  • the diol compound other than the glycol include aromatic, aliphatic and alicyclic diol compounds such as cyclohexane-1,4-dimethanol, neopentyl glycol, bisphenol A and bisphenol S. .
  • the polyester may be synthesized by any method.
  • terephthalic acid and ethylene glycol are usually esterified directly, or a lower alkyl ester of terephthalic acid such as dimethyl terephthalate is transesterified with ethylene glycol, or
  • a first stage reaction in which terephthalic acid and ethylene oxide are reacted to form a glycol ester of terephthalic acid and / or a low polymer thereof, and the reaction product of the first stage is heated under reduced pressure. It can be produced by a second stage reaction in which a polycondensation reaction is performed until a desired degree of polymerization is achieved.
  • a multifilament it can be produced by, for example, an assembly of monofilament yarns produced by a known electrospinning method, a composite spinning method, or the like.
  • a composite spinning method as a nanofiber with a large number of single fibers, sea-island type composite fiber yarns consisting of two types of polymers with different solubility are prepared, and the sea components of the sea-island type composite fiber are removed with a solvent. , Ultrafine fiber.
  • the thickness and distribution of each of the island components are not limited, a multifilament made of nanofibers can be formed by reducing the diameter of the island components by a method such as increasing the number of island components. In this invention, it is preferable that a nanofiber is included.
  • the number of island components is 5 or more, preferably 24 or more, and more preferably 50 or more, although there is a relationship with the single fiber fineness or the presence or absence of twisted yarns on single fibers.
  • voids composed of a plurality of single fibers, that is, portions where the conductive resin is supported are re-differentiated so that the conductive resin is supported on the fiber structure.
  • the continuity of the conductive resin is maintained even if the fiber diameter is reduced to be finely divided.
  • the cross-sectional shape of the single fiber is not particularly limited even if it is a round cross-section, a triangular cross-section, or any other irregular cross-section having a high degree of deformity.
  • the cross-sectional form of the entire multicomponent fiber is not limited to a round hole, but includes cross-sections of all known fibers such as a trilobal type, a tetralobal type, a T type, and a hollow type.
  • Examples of the fiber structure using the multifilament yarn of the present invention include those having forms such as mesh, papermaking, woven fabric, knitted fabric, nonwoven fabric, ribbon, and string. Used in various forms according to the purpose of use.
  • fiber structures are not limited to implementation unless the performance as an antenna such as dyeing and functional processing is impaired by ordinary methods and means.
  • the surface physical processing such as raising of the antenna surface shape, calendering, embossing, water jet punching is not limited in the same manner.
  • the conductive resin containing at least carbon atoms is supported on the fiber surface and / or on the single fiber gap, and preferably on the single fiber gap. Furthermore, it is preferable that the conductive resin is in a form that is substantially continuously present in the fiber axis direction in the gap between the single fibers constituting the multifilament yarn. In the case of this aspect, the adhesion between the conductive resin and the single fiber is even higher, and the conductivity is even higher, so the gain is extremely higher than the antenna using the conventional conductive cloth, and as a result, The communication distance is further increased.
  • the conductive resin has a structure wrapped in fibers, the wavelength is shortened according to the dielectric constant of the fibers, and the antenna becomes small. Whether or not the conductive resin exists substantially continuously in the fiber axis direction in the gap between the single fibers is determined by examining the fracture surface in the fiber axis direction of the conductive fiber structure with a scanning electron microscope (SEM). ), And the overlapping of the conductive resin existing in the gap between the five single fibers randomly selected from the obtained cross-sectional photograph is observed, and if there is an overlap, it is determined that there is continuity.
  • SEM scanning electron microscope
  • the fracture surface in the fiber axis direction is the warp direction
  • the fracture surface in the fiber axis direction is a direction in which the loop is split at the apex of the loop when a loop exists in the stitch
  • the nonwoven fabric or the like breaks in any direction along the fiber axis direction.
  • other materials are also attached to the conductive fiber structure along with the conductive resin, perform analysis that allows elemental analysis of the elements that make up the conductive resin, and identify the presence of the conductive resin. To do.
  • the fracture surface in the fiber axis direction of the conductive fiber structure is observed with an energy dispersive X-ray (EDX) analyzer, which is an accessory device of a scanning electron microscope (SEM) device, and the surface and There is a method for obtaining the amount of carbon atoms contained in the conductive resin carried in the single fiber gap, but this is not a limitation.
  • EDX energy dispersive X-ray
  • SEM scanning electron microscope
  • Examples of the conductive resin containing carbon atoms used in the present invention include carbon black, carbon nanotubes, graphene, metal particles, etc., in a resin having a relatively low conductivity (hereinafter sometimes referred to as a low conductive resin).
  • Examples thereof include, but are not limited to, a conductive resin such as a conductive resin imparted with conductivity and a conductive polymer in which the resin itself has conductivity.
  • These conductive resins have higher flexibility than metal materials, and deformation due to bending of the antenna does not remain after bending, and are excellent in resistance to bending and characteristics after repeated washing. Furthermore, since the flexibility is high, there is also an effect that the comfort is good when wearing the clothes equipped with the antenna of the present invention.
  • a conductive polymer is preferable from the viewpoint of stability of antenna characteristics during expansion and contraction and bending.
  • the conductivity of the conductive resin changes due to the deformation of the conductive resin caused by expansion / contraction or bending of the antenna. As a result, the antenna characteristics may change. It is.
  • the conductive polymer is not particularly limited as long as it is a polymer exhibiting conductivity.
  • acetylene-based, 5-membered heterocyclic ring as monomer, pyrrole, 3-methylpyrrole, 3-ethylpyrrole
  • 3-alkylpyrrole such as 3-dodecylpyrrole
  • 3,4-dialkylpyrrole such as 3,4-dimethylpyrrole and 3-methyl-4-dodecylpyrrole
  • N-alkyl such as N-methylpyrrole and N-dodecylpyrrole Pyrrole
  • N-alkyl-3-alkylpyrrole such as N-methyl-3-methylpyrrole and N-ethyl-3-dodecylpyrrole
  • dopants have an effect on the conductivity.
  • the dopants used here include halide ions such as chloride ions and bromide ions, perchlorate ions, tetrafluoroborate ions, hexafluoride ions and hexafluoride ions.
  • the conductive polymer examples include polypyrrole, PEDOT (poly3,4-ethylenedioxythiophene), and the like, and poly-4-styrene sulfonate (PSS), polyaniline, and polyparaphenylene vinylene.
  • An embodiment in which a dopant selected from (PPV) is used in combination is easy to resinize and is preferably used as a conductive polymer.
  • a dopant selected from (PPV) is used in combination is easy to resinize and is preferably used as a conductive polymer.
  • the case of using in combination in this manner may be represented by “/”, for example, PEDOT / PSS.
  • PEDOT / PSS (Denatron (registered trademark) manufactured by Nagase ChemteX Corporation) in which PEDOT of thiophene-based conductive polymer is doped with poly 4-styrenesulfonate PSS is particularly suitable from the viewpoint of safety and workability.
  • the conductive resin contains a binder resin.
  • the binder resin is preferably at least one selected from the group consisting of an olefin resin, a polyester resin, polyurethane, an epoxy resin, and an acrylic resin.
  • an olefin resin is most preferable from the viewpoint of bringing the compound constituting the conductive resin in the conductive fiber structure into close contact with each other and more reliably imparting conductivity to the fiber structure.
  • an olefin resin to the conductive polymer.
  • a conductive resin having an average particle diameter of 20 nm or less in dynamic light scattering measurement as the conductive resin to be carried on the fiber structure.
  • a conductive resin having an average particle diameter of 20 nm or less when using a conductive resin whose main component is a mixture of a conductive polymer and an olefin resin, it is preferable to use a conductive resin having an average particle diameter of 20 nm or less.
  • the “main component” means to occupy a mass ratio of 50% or more of the constituent materials other than the fibers of the conductive fiber structure.
  • the olefin resin is preferably a nonpolar olefin resin from the viewpoint of flexibility and washing durability of the obtained conductive fiber structure.
  • non-polar means that the solubility parameter (SP) value is 6 to less than 10, preferably 7 to 9. This SP value is a value determined by solubility.
  • the non-polar olefin resin preferably has an SP value of 6 to less than 10.
  • a nonpolar olefin resin may be used independently and may use 2 or more types together.
  • the olefin resin examples include polyethylene, polypropylene, cycloolefin polymer (cyclic polyolefin), and polymers obtained by modifying them. In the fiber structure having conductivity, these may be used as an olefin resin, or those obtained by modifying polyvinyl chloride, polystyrene or the like with an olefin may be used as the olefin resin. These may be used alone or in combination of two or more.
  • a solvent may be added to form a treatment liquid, which may be used for processing.
  • the solvent is not particularly limited.
  • water alcohols such as methanol, ethanol, 2-propanol, 1-propanol, and glycerin
  • ethylene glycols such as ethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol
  • ethylene Glycol ethers such as glycol monomethyl ether, diethylene glycol monomethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether
  • glycol ether acetates such as ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate
  • propylene glycol, dipropylene Glycol tripropylene Propylene glycols such as coal; propylene glycol monomethyl ether, propylene glycol monoe
  • glycerol As the conductive fiber structure of the present invention, those provided with glycerol, physiological saline, or the like can be suitably used from the viewpoint of improving and stabilizing the conductivity, but are not limited thereto.
  • the conductive fiber structure of the present invention uses a precursor of the exemplified conductive resin or a treatment liquid such as a conductive resin solution, emulsion, or dispersion obtained by adding the above solvent to the conductive resin.
  • the fiber structure can be supported by a known method such as dipping, coating, or spraying.
  • the method for supporting the fiber structure is not particularly limited, but in order to support the conductive resin on the surface of the fiber and the gap between the single fiber and the single fiber, a conductive resin solution (emulsion, It is desirable to repeat immersion or spraying a plurality of times (including the dispersion).
  • a conductive resin solution emulsion, It is desirable to repeat immersion or spraying a plurality of times (including the dispersion).
  • the treatment agent containing the conductive resin is supported on the fiber structure and then heated.
  • heating giving a thermal history not lower than the softening point of the component contained in the conductive resin and not higher than the decomposition temperature causes the component to melt and penetrate more into the single fiber gap and firmly adhere to it. It is preferable at the point which can provide the further washing resistance.
  • the heating temperature is preferably 180 ° C. or lower, more preferably 80 ° C. to 180 ° C., and still more preferably 100 ° C. to 150 ° C. When the heating temperature is within the above range, the adhesion between the compounds constituting the conductive resin is good, and the fiber structure can be more reliably imparted with conductivity.
  • the antenna of the present invention preferably has a resin layer laminated on one side of a conductive fiber structure containing a conductive resin.
  • a resin layer laminated on one side of a conductive fiber structure containing a conductive resin.
  • waterproof and moisture-permeable layers examples include PTFE (polytetrafluoroethylene) porous membranes, non-porous membranes made of hydrophilic elastomers such as hydrophilic polyester resins and polyurethane resins, polyurethane resin microporous membranes, and other known membranes, films and laminates.
  • PTFE polytetrafluoroethylene
  • non-porous membranes made of hydrophilic elastomers such as hydrophilic polyester resins and polyurethane resins, polyurethane resin microporous membranes, and other known membranes, films and laminates.
  • a form in which a resin or the like is laminated by a coating or laminating method is exemplified, but the invention is not limited thereto.
  • the waterproof / moisture permeable layer is preferably one in which a polyurethane resin microporous film having stretchability is laminated and adhered by lamination from the viewpoint of followability to a conductive fiber structure as a
  • the performance of the antenna is related to the surface resistivity of the conductive fiber structure with respect to an alternating current having the same frequency as that used for communication, and the surface resistivity is preferably 0.01 to 0.1 ⁇ / ⁇ .
  • the frequency used for communication 100 MHz to 5 GHz is preferable from the viewpoint of communication performance such as communication distance, and 920 MHz and 2.45 GHz are particularly preferable from the viewpoint of easy availability of communication equipment.
  • the surface resistivity is greater than 0.1 ⁇ / ⁇ , the current value flowing through the antenna is small, and stable communication is difficult.
  • the configuration of the antenna of the present invention includes a laminate of a conductor and a dielectric made of the conductive fiber structure processed into the shape of the antenna.
  • a dielectric material Fiber structures, such as a mesh, papermaking, a textile fabric, a knitted fabric, a nonwoven fabric, polymer films, such as a polyethylene terephthalate, and ceramic substrates, such as an alumina, can be used.
  • the dielectric constant of the dielectric is preferably low.
  • an insulating base material is preferably used as the dielectric.
  • the fiber structure contains air in the gap between the fibers and has a low relative dielectric constant and a high flexibility, it can be suitably used for an antenna for smart textiles.
  • the relative dielectric constant of a polyethylene terephthalate film which is a typical polymer film
  • the relative dielectric constant of polytetrafluoroethylene which is a surface low dielectric polymer
  • the relative dielectric constant of the nonwoven fabric is as low as 1.4.
  • the number of laminated layers is not particularly limited, and a two-layer structure composed of a conductive fiber structure and a conductor, a first conductor composed of a conductive fiber structure, a dielectric, and a conductive fiber.
  • a three-layer structure composed of a second conductor composed of a structure, a first conductor composed of a conductive fiber structure, a first dielectric, a second conductor composed of a conductive fiber structure, a second Examples include, but are not limited to, a dielectric, a third conductor made of a conductive fiber structure, a six-layer structure made of a third dielectric, and the like.
  • a loop antenna used for communication in the HF (High Frequency) band, a spiral antenna, or communication in the UHF (Ultra High Frequency) band.
  • a dipole antenna see FIG. 1B
  • a patch antenna see FIGS. 1C and 1D
  • a microstrip antenna a dipole array antenna
  • a ring antenna a ring antenna.
  • an antenna 2 made of a conductive fiber structure is formed in a loop shape on a dielectric 2 made of an insulating fiber structure.
  • the dipole antenna shown in FIG. 1B is a laminate of a dielectric 2 made of an insulating fiber structure and a conductor 1 made of the conductive fiber structure processed into a specific pattern.
  • 1B illustrates a meander-shaped antenna, but the shape is not limited as long as it has antenna performance, and a linear structure as shown in FIG. 2 may be used.
  • the width of the pattern is not particularly limited, and is designed from the viewpoint of antenna performance, pattern processability, and the like.
  • the patch antenna shown in FIGS. 1C and 1D is a laminate of a first conductor 3A made of a conductive fiber structure, a dielectric 2 made of an insulating fiber structure, and a second conductor 3B made of a conductive fiber structure. And the first and second conductors are electrically connected.
  • the first conductor 3A plays a role of transmitting and receiving radio waves, and needs to be processed into a specific pattern shape.
  • An example of the shape is the shape shown in FIG. 1C, but is not limited thereto.
  • the structure shown in FIG. 3, the square shown in FIG. 1C, or the circle shown in FIG. A replacement structure may be used.
  • the second conductor 3B absorbs radio waves radiated from the first conductor 3A and prevents radio waves from being radiated to the back surface of the antenna. Note that the second conductor 3B does not need to be processed into a specific pattern shape.
  • the method of electrically connecting the first conductor 3A and the second conductor 3B there is no particular limitation on the method of electrically connecting the first conductor 3A and the second conductor 3B.
  • a method of disposing a conductive fiber structure in the dielectric 2 a method of piercing a metal pin
  • Examples include a method using a metal button.
  • a metal button As the metal button, a male button or a female button of a dot button is used.
  • the male button disposed on the first conductor 3A and the second conductor 3B By engaging the male button disposed on the first conductor 3A and the second conductor 3B with the female button disposed on the dielectric 2, the first conductor 3A and the second conductor 3B are engaged.
  • a structure in which a female button is disposed on the first conductor 3A and the second conductor 3B and a male button is disposed on the dielectric 2 may be employed.
  • the method for processing the conductive fiber structure into a predetermined pattern is not particularly limited, and known techniques such as laser cutting, heat cutting, and die cutting can be used. Moreover, there is no restriction
  • the antenna with the conductive fiber structure attached to the insulating fiber structure may be attached to the clothes, or the conductive fiber structure may be directly attached to the clothes. From the viewpoints of comfort, design, etc., it is preferable to apply the conductive fiber structure directly to the clothes.
  • the antenna of the present invention By combining the antenna of the present invention and a semiconductor circuit having a communication function, it can be used as a wireless communication device.
  • a wireless communication apparatus An RFID tag, a beacon, a BlueTooth (trademark) communication apparatus etc. are mentioned.
  • a wireless communication apparatus An RFID tag, a beacon, a BlueTooth (trademark) communication apparatus etc. are mentioned.
  • By attaching these wireless communication devices to uniforms it can be used for individual tracking of students, confirmation of attendance, etc. at school.
  • it by attaching these wireless communication devices to hospitalized patients' inpatients, it can be used for inpatient individual tracking, individual authentication, and the like.
  • the number of antennas and semiconductor circuits is not limited, and one antenna and one semiconductor circuit may be connected to each other, or two or more antennas may be connected to one semiconductor circuit.
  • a blind spot of communication can be reduced by attaching a wireless communication device having two or more antennas to clothes. For example, by attaching the antenna of the present invention to the chest and back, stable communication is possible regardless of the body orientation with respect to the radio wave transmitter / receiver.
  • connection method between the antenna and the semiconductor circuit There are no particular restrictions on the connection method between the antenna and the semiconductor circuit.
  • metal wires, conductive yarns woven with metal wires, and the like are connected as wires, and connection using the conductive fiber structure according to the present invention can be mentioned.
  • the conductive fiber structure of the present invention is preferably used as the wiring.
  • the first conductor 3A made of a conductive fiber structure functioning as an antenna and the conductive fiber structure used as the wiring 4 are integrated.
  • the type of sensor is not particularly limited. Sensors for acquiring environmental information such as temperature, humidity, illuminance, impact, and position, such as heart rate, electrocardiogram waveform, respiratory rate, blood pressure, brain potential, and myoelectric potential Examples include a bioelectrode for acquiring a biosignal, a biosensor for acquiring a blood glucose level, a cholesterol level, a hormone level, and the like.
  • the wireless communication device and the sensor may be connected using wiring or may be connected by wireless communication.
  • the wireless communication device combining the antenna of the present invention and a semiconductor circuit can be used as a reader / writer antenna for an RFID tag.
  • a reader / writer antenna for an RFID tag.
  • the reader / writer antenna is required to have bending resistance. Since the antenna of the present invention is rich in flexibility and excellent in bending resistance, it can be suitably used as a reader / writer antenna for hospitalized beds.
  • Method for producing conductive fiber structure 75T- of an alkali hot water soluble polyester comprising an island component of polyethylene terephthalate and a sea component of polyester as a polyester acid component of terephthalic acid and 5-sodium sulfoisophthalic acid.
  • 100T-136F which is a mixture of 112F (sea-island ratio 30%: 70%, 127 islands / F) nanofibers with a single fiber diameter of 700 nm and 22T-24F single-fiber diameter 22.85 ⁇ m polyethylene terephthalate high shrink yarn
  • a circular knitted fabric was knitted with a smooth structure using the polyester nanofiber mixed yarn.
  • the fabric was dipped in a 3% by weight aqueous solution of sodium hydroxide (75 ° C., bath ratio 1:30) to remove easily soluble components, and a knitted fabric using mixed fibers of nanofibers and high shrinkage yarns was obtained.
  • the density of the knitted fabric is 58 ⁇ 78 (lines / in), and the basis weight is 118 (g / cm 2 ).
  • "Denatron FB408B" manufactured by Nagase ChemteX Corporation as a dispersion containing a conductive polymer and an olefin resin is applied to the knitted fabric as the obtained fiber structure, and the conductive polymer is applied by a known knife coating method.
  • FIG. 10 is a cross-sectional photograph using the conductive resin impregnated area ratio of the conductive fiber structure for evaluation.
  • FIG. 10 shows that the surface layer is impregnated with a low resistance, that is, a conductive resin from 30 ⁇ m.
  • the surface resistivity of the manufactured conductive fiber structure was 0.045 ⁇ / ⁇ .
  • a 30 ⁇ m ⁇ 30 ⁇ m square region is set so that the highest portion of the surface layer portion of the fiber structure is in contact with the upper part of the visual field, as shown in the cross-sectional image of FIG.
  • a 15 ⁇ m ⁇ 30 ⁇ m area 15 ⁇ m lower than the highest position of the surface layer part is set using an image processing software (GIMP 2.8 portable), a threshold value is set to 60, and 15 to 15 ⁇ m from the surface layer in the thickness direction of the conductive fiber structure.
  • the area ratio impregnated with the conductive resin in the 30 ⁇ m region was determined. At this time, the number of cross sections obtained by random sampling was measured at 20 locations.
  • Average particle diameter of conductive polymer (dynamic light scattering method) The average particle diameter of a 50-fold diluted conductive polymer obtained by adding 1 g of a conductive polymer to 49 g of water while stirring was measured using a Nanotrac Wave series manufactured by Microtrac. Specifically, the volume resistance diameter was measured to obtain the particle diameter distribution, and the hydrodynamic diameter median diameter was calculated as the average particle diameter.
  • the average particle diameter of the conductive polymer in “Denatron FB408B” used in (1) was 20 nm or less.
  • the conductive fiber structure produced by the method described in (1) as a strip conductor is made of polytetrafluoroethylene having a thickness of 2 mm as a substrate.
  • a half-wavelength microstrip line resonator A having an impedance of 50 ⁇ was prepared.
  • the length of the strip conductor was 42 mm, the width was 3 mm or 6 mm, both ends were open, and the resonance frequency was about 2.4 GHz.
  • Excitation was performed from one coaxial cable of the half-wavelength microstrip line resonator A, a network analyzer was connected to the other coaxial cable, and an unloaded Q value (Q A ) was measured.
  • a half-wavelength microstrip line resonator B was prepared in the same manner as the half-wavelength microstrip line resonator A except that copper foil was used as the strip conductor, and the unloaded Q value (Q B ) was measured.
  • Q Sample is a Q value resulting from the loss of the conductive fiber structure strip
  • Q Cu is a Q value resulting from the loss of the copper foil strip
  • 1 / Q A ⁇ 1 / Q B 1 / Q Sample ⁇ 1 / Q Cu relation holds.
  • Q Cu was calculated from the surface resistivity of the copper foil
  • Q Sample was calculated by applying the value to the above formula, and the surface resistivity and conductivity of the conductive fiber structure were calculated using the results. .
  • the measurement antenna prepared in (7) was installed on a turntable, and a network analyzer (N5230C, manufactured by Agilent Technologies) was used.
  • the turntable was rotated by 7.5 degrees, and at each rotational position, a radio wave was transmitted from the transmitting antenna connected to the network analyzer to the measuring antenna, and the gain was measured.
  • the radiation pattern was measured in an anechoic chamber using two types of horizontal polarization and vertical polarization.
  • Example 1 About the conductive fiber structure created by the method described in (1), when the surface resistivity and conductivity were measured by the method described in (6), the surface resistivity was 0.045 ⁇ / ⁇ , and the conductivity was It was 4.76 ⁇ S / m. The reflection coefficient measured by the method described in (7) was ⁇ 17.2 dB. Moreover, the XZ plane radiation pattern measured by the method described in (8) is indicated by a broken line in FIG.
  • Comparative Example 1 Circular knitted fabrics were knitted using nickel / copper-plated fibers (manufactured by Tanimura Co., Ltd., MK-KTN260).
  • the surface resistivity and conductivity measured by the method described in (6) are 0.050 ⁇ / ⁇ and 3.84 ⁇ S / m, respectively, and the reflection coefficient measured by the method described in (7) is ⁇ 15.2 dB. there were.
  • the XZ plane radiation pattern measured by the method described in (8) is shown by the solid line in FIG. From the XZ plane radiation pattern of FIG. 7, the gain of the antenna of Example 1 was 0.4 dB higher than that of Comparative Example 1, and the communication distance was increased by 6%.
  • Example 2 The reflection coefficient and XZ plane radiation pattern were measured in the same manner as in Example 1 except that the measurement antenna produced in (7) was attached to the human phantom shown in FIG.
  • the reflection coefficient is ⁇ 17.3 dB
  • the XZ plane radiation pattern is indicated by a broken line in FIG.
  • the human phantom is designed with a human body having a relative dielectric constant of 53.6 and a conductivity of 1.81 S / m.
  • Comparative Example 2 The reflection coefficient and the XZ plane radiation pattern were measured in the same manner as in Example 2 except that the antenna manufactured in Comparative Example 1 was used. The reflection coefficient is -15.0 dB, and the XZ plane radiation pattern is shown by the solid line in FIG. From the XZ plane radiation pattern of FIG. 9, the gain of the antenna of Example 2 was 0.4 dB higher than that of Comparative Example 2, and the communication distance increased by 6%.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

L'objet de la présente invention est de réaliser une antenne qui est flexible et dont la performance n'est pas réduite après des courbures ou des lavages répétés, un dispositif de communication sans fil, un dispositif de mesure de signaux biométriques, et un vêtement. L'antenne selon la présente invention comprend, au moins, une structure de fibres électriquement conductrices dans laquelle un polymère électriquement conducteur incluant des atomes de carbone est porté sur une surface et/ou dans un espace de monofilament de fibres dont le diamètre n'est pas inférieur à 100 nm est n'est pas supérieur à 1000 nm. L'antenne est caractérisée en ce qu'un mélange du polymère électriquement conducteur et d'une résine à base d'oléfines est utilisé comme composant primaire, et en ce qu'une résine conductrice observée dans une zone comprise entre 15 et 30 μm depuis une couche supérieure est imprégnée avec un ratio d'aire qui n'est pas inférieur à 15 %.
PCT/JP2018/010556 2017-03-30 2018-03-16 Antenne, dispositif de communication sans fil, dispositif de mesure de signaux biométriques, et vêtement Ceased WO2018180629A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019509302A JP6999139B2 (ja) 2017-03-30 2018-03-16 アンテナ、無線通信装置、生体信号測定装置、および衣服

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017068087 2017-03-30
JP2017-068087 2017-03-30

Publications (1)

Publication Number Publication Date
WO2018180629A1 true WO2018180629A1 (fr) 2018-10-04

Family

ID=63675530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/010556 Ceased WO2018180629A1 (fr) 2017-03-30 2018-03-16 Antenne, dispositif de communication sans fil, dispositif de mesure de signaux biométriques, et vêtement

Country Status (3)

Country Link
JP (1) JP6999139B2 (fr)
TW (1) TW201841129A (fr)
WO (1) WO2018180629A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021029292A (ja) * 2019-08-16 2021-03-01 国立大学法人千葉大学 褥瘡検出装置、及び褥瘡検出方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI707502B (zh) * 2019-06-21 2020-10-11 長庚大學 可穿戴雙寬頻織物天線
US12147857B2 (en) * 2019-09-17 2024-11-19 Lintec Corporation RFID-tagged flexible material having an antenna containing a carbon nanotube yarn and method for manufacturing
TWI874781B (zh) * 2022-06-22 2025-03-01 國立陽明交通大學 導電組成物、包含其之導電纖維及其製備方法
CN115948917B (zh) * 2023-02-02 2025-04-22 武汉纺织大学 一种防静电聚酯面料及其制备方法
TWI871024B (zh) * 2023-09-26 2025-01-21 國立陽明交通大學 可修復基材、其製備方法及修復方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090286055A1 (en) * 2005-11-08 2009-11-19 Behnam Pourdeyhimi Methods and Devices for Providing Flexible Electronics
JP2013159882A (ja) * 2012-02-07 2013-08-19 Japan Vilene Co Ltd 繊維シート
WO2016051574A1 (fr) * 2014-10-02 2016-04-07 富士通株式会社 Élément, procédé de fabrication d'un élément, dispositif électronique et procédé de fabrication d'un dispositif électronique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6677917B2 (en) * 2002-02-25 2004-01-13 Koninklijke Philips Electronics N.V. Fabric antenna for tags
JP3982404B2 (ja) * 2002-12-19 2007-09-26 トッパン・フォームズ株式会社 導電回路の形成方法
JP4984458B2 (ja) * 2005-08-29 2012-07-25 ソニー株式会社 半導体装置
JP6215637B2 (ja) * 2013-10-02 2017-10-18 日本電信電話株式会社 生体情報収集装置
US10772524B2 (en) * 2015-07-08 2020-09-15 Nippon Telegraph And Telephone Corporation Biomedical electrode and wearable electrode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090286055A1 (en) * 2005-11-08 2009-11-19 Behnam Pourdeyhimi Methods and Devices for Providing Flexible Electronics
JP2013159882A (ja) * 2012-02-07 2013-08-19 Japan Vilene Co Ltd 繊維シート
WO2016051574A1 (fr) * 2014-10-02 2016-04-07 富士通株式会社 Élément, procédé de fabrication d'un élément, dispositif électronique et procédé de fabrication d'un dispositif électronique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021029292A (ja) * 2019-08-16 2021-03-01 国立大学法人千葉大学 褥瘡検出装置、及び褥瘡検出方法

Also Published As

Publication number Publication date
JP6999139B2 (ja) 2022-01-18
TW201841129A (zh) 2018-11-16
JPWO2018180629A1 (ja) 2020-02-06

Similar Documents

Publication Publication Date Title
JP6999139B2 (ja) アンテナ、無線通信装置、生体信号測定装置、および衣服
CN105939659B (zh) 电极元件及装置
Agcayazi et al. Flexible interconnects for electronic textiles
US10251266B2 (en) Wearable flexible printed circuit board and method of manufacturing the same
Zhang et al. Textile antennas and sensors for body-worn applications
US9880238B2 (en) MRI receiver coil providing an enhanced signal-to-noise ratio
EP2084324B1 (fr) Tissu conducteur imprimé souple, et son procédé de fabrication
JP2010509108A6 (ja) 伝導性ファブリックおよびその製造方法
US11043728B2 (en) Flexible fabric antenna system comprising conductive polymers and method of making same
EP2293460B1 (fr) Structure en feuille servant à communiquer
Zhang et al. Non‐uniform mesh for embroidered microstrip antennas
Rafiq et al. A review on the manufacturing techniques for textile based antennas
US20170301979A1 (en) Conformable antenna using conducting polymers
JP2012243993A (ja) ノイズ吸収布帛
CN113508648A (zh) 电磁波屏蔽材料
KR100889489B1 (ko) 도전성 섬유재를 갖는 연성 회로기판 및 이를 갖는전자제품
Kiourti et al. Conductive textiles for wearable electronics
Agarwal et al. Analysis of Flexible Textile Antenna Design and Their Application for Wireless Communication: A Survey
JP2009218683A (ja) 通信用シート構造体
Chatterjee et al. Advanced electromagnetic interference shielding textiles and clothing
JP6236517B2 (ja) ノイズ吸収布帛
Ghodake et al. A review of wearable antenna
Bao et al. Investigation of embroidery conductive layer dyed with graphene and ZnO
ESSELLE et al. Polydimethylsiloxane-Embedded Conductive Fabric: Characterization and Application for Realization of Robust Passive and Active Flexible Wearable Antennas
JP2009296220A (ja) 通信用シート構造体

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18776370

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019509302

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18776370

Country of ref document: EP

Kind code of ref document: A1