WO2022054487A1 - Condensateur étirable et système de détection à porter sur soi - Google Patents

Condensateur étirable et système de détection à porter sur soi Download PDF

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Publication number
WO2022054487A1
WO2022054487A1 PCT/JP2021/029495 JP2021029495W WO2022054487A1 WO 2022054487 A1 WO2022054487 A1 WO 2022054487A1 JP 2021029495 W JP2021029495 W JP 2021029495W WO 2022054487 A1 WO2022054487 A1 WO 2022054487A1
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WIPO (PCT)
Prior art keywords
stretchable
layer
capacitor
elastic
resin
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PCT/JP2021/029495
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English (en)
Japanese (ja)
Inventor
雄一郎 表
翔太 森本
達彦 入江
祐輔 清水
郷司 前田
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東洋紡株式会社
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Priority to JP2022547449A priority Critical patent/JPWO2022054487A1/ja
Publication of WO2022054487A1 publication Critical patent/WO2022054487A1/fr

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D1/00—Garments
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • 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
    • 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
    • D06M17/00—Producing multi-layer textile fabrics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture

Definitions

  • the present invention is a stretchable capacitor that can detect its own deformation as a change in capacitance, and a garment provided with the stretchable capacitor.
  • the present invention relates to sensing wear capable of substantially non-invasively detecting changes in body shape due to changes in capacitance, that is, movements of limbs, body shape, posture, breathing, mastication, swallowing, pulsation, fetal movement, and the like.
  • Patent Document 1 and Patent Document 2 disclose an elastic capacitor element having a structure in which a dielectric layer made of an elastomer is sandwiched between electrodes, and a displacement amount and a strain amount are detected from a change in capacitance caused by deformation of the capacitor. It is disclosed that it can be used for sensing.
  • Patent Document 3 discloses a method of sensing a joint angle using a bending capacitor whose capacitance changes depending on the bending angle as a sensor.
  • Patent Document 4 discloses sensing wear in which a strain sensor is bonded to a garment fabric using a hot melt adhesive layer.
  • the sensing method using a sensor attached to clothes can reduce the discomfort and discomfort of the wearer compared to the sensing method in which the sensor is directly attached to the body, and it is possible to exercise and live without being aware of the sensor. It has the advantage of being able to monitor a person's more natural condition. On the other hand, there is a difficult point in that sensing is continued under certain conditions due to slippage of clothes. If the area of the sensor element is increased, some deviation can be tolerated. Especially in the detection method using the change in capacitance of the capacitor element that can be expanded and contracted, it is relatively easy to increase the area of the sensor element. In addition, increasing the area also contributes to the improvement of sensor sensitivity.
  • a bonding method using a hot melt adhesive is convenient.
  • the hot melt adhesive invades the garment fabric and forms a composite layer of the fibers of the garment fabric and the hot melt adhesive resin on the adhesive surface and adheres to the adhesive surface. Since this composite layer has a structure similar to that of fiber reinforced plastic, it restricts the degree of freedom of deformation of the garment fabric to be adhered.
  • the sensor element is small, only a part of the garment fabric loses the degree of freedom of deformation, so that a big problem does not occur.
  • the degree of freedom of deformation in a considerable area of the garment fabric is hindered.
  • the sensor Since the purpose of sensing is the movement of limbs and changes in body movement, the sensor is naturally attached to a place where deformation is likely to occur, and the degree of freedom of deformation of the clothing fabric in such a place is hindered. It can be said that the mounting method is such that it falls over.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to easily realize a sensor element having a large area and to attach the cloth to clothes without impairing the degree of freedom of deformation of the cloth. It is the provision of a stretchable capacitor that can be used as a sensor element having an applicable structure, and the provision of sensing wear in which the stretchable capacitor is attached by a method that does not hinder the degree of freedom of deformation of the garment fabric.
  • the present inventors have found a novel structure of a stretchable capacitor that can be sewn to a garment fabric by introducing a cloth structure into a dielectric layer, and the stretchable capacitor having such a structure.
  • a novel structure of a stretchable capacitor that can be sewn to a garment fabric by introducing a cloth structure into a dielectric layer, and the stretchable capacitor having such a structure.
  • the present invention has the following configuration.
  • [1] In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
  • a stretchable capacitor wherein the stretchable dielectric layer has a stretchable sheet-like cloth and a composite layer containing a fiber and a resin that contribute to adhesion between the conductive layer and the cloth.
  • [2] The stretchable capacitor according to [1], wherein the stretchable sheet-shaped cloth is a knit cloth having a 2-way tricot structure.
  • [3] The stretchable capacitor according to [1] or [2], wherein the stretchable dielectric layer further has a resin layer.
  • [4] In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
  • a stretchable capacitor wherein the stretchable dielectric layer is composed of a resin layer and a composite layer containing fibers and a resin.
  • a stretchable capacitor wherein the stretchable dielectric layer is a composite layer containing a fiber and a resin.
  • the present invention further preferably has the following configuration.
  • the sensing wear is characterized in that the sensing wear is provided with electrical wiring for connecting a stretchable capacitor and a device for detecting the capacitance of the stretchable capacitor.
  • the stretchable conductive layer constituting the stretchable capacitor includes at least a conductive layer mainly using a metal-based conductive filler and a conductive layer using a carbon-based conductive filler.
  • the sensing wear according to [7] which has a glove shape and is characterized in that the elastic capacitor is arranged at least in one or more parts of each joint of a wrist and a finger.
  • the elastic capacitor of the present invention uses a cloth as a dielectric layer.
  • the cloth is a stretchable sheet-like material, which is a pseudo-planar material obtained by combining threads, and is classified into a woven fabric, a knitted fabric, and a non-woven fabric.
  • it is preferable to use a cloth having a knit structure, and it is preferable to use a cloth having a 2-way tricot structure, but such a cloth can be sewn. It is possible in terms of shape to sew a stretchable capacitor using a conventional stretchable resin sheet as a dielectric layer, that is, to sew it to another material (fabric) with a sewing thread.
  • the dielectric layer includes a fabric which is a fiber structure, it can be attached to a garment fabric by sewing, that is, can be sewn. This does not mean that it can be simply attached, but it means that it can be used as a sensing wear having sufficient practicality as clothes, that is, a load at the time of putting on and taking off and sufficient washing durability.
  • FIG. 1 is a schematic view showing a cross-sectional structure of an example of an embodiment of an elastic capacitor used in the present invention.
  • the conductive layer has a two-layer structure, and most of the conductive layer is covered with a cover insulating layer.
  • the composite layer containing the resin and the fiber exists only in the surface layer of the fabric, and the resin does not penetrate into the central portion (in the thickness direction) of the fabric.
  • FIG. 2 is a schematic view showing a cross-sectional structure of an example of an aspect of the stretchable capacitor used in the present invention. In this example, only the portion of the conductive layer that comes into contact with the snap fastener has a two-layer structure.
  • FIG. 1 is a schematic view showing a cross-sectional structure of an example of an embodiment of an elastic capacitor used in the present invention.
  • the conductive layer has a two-layer structure, and most of the conductive layer is covered with a cover insulating layer.
  • the composite layer containing the resin and the fiber exists only in the surface
  • FIG. 3 is a schematic view showing a cross-sectional structure of an example of an aspect of the stretchable capacitor used in the present invention.
  • the resin penetrates to the center of the fabric, and the thickness of the composite layer containing the resin and the fiber is substantially equal to the thickness of the fabric.
  • FIG. 4 is a schematic view showing a cross-sectional structure of an example of an aspect of the stretchable capacitor used in the present invention.
  • the fabric, the composite layer, and the resin layer (hot melt adhesive layer) for adhering the conductive layer are included, and almost all of the resin contained in the composite layer has penetrated into the fabric.
  • FIG. 5 is a schematic view showing a cross-sectional structure of an example of an aspect of the stretchable capacitor used in the present invention.
  • FIG. 6 is a process diagram showing an outline of the method for manufacturing a stretchable capacitor of the present invention.
  • FIG. 7 is the first half of a process diagram showing details of an example of the method for manufacturing a stretchable capacitor of the present invention.
  • FIG. 8 is the latter half of the process diagram showing the details of an example of the method for manufacturing the stretchable capacitor of the present invention.
  • FIG. 6 is a process diagram showing an outline of a manufacturing method for obtaining the stretchable capacitor of the present invention.
  • a resin layer (hot melt adhesive layer) of a laminate having a layer structure of release paper 400 / elastic conductive layer 200 / resin layer (hot melt adhesive layer) 300 is used as the cloth.
  • the basic form of the stretchable capacitor of the present invention can be obtained by facing (step J), bonding by heating and pressurizing (step K), and peeling off the release paper 400 (step L).
  • step K the resin of the resin layer (hot melt adhesive layer) permeates the fabric to form a stretchable composite layer containing fibers and resin.
  • the composite layer can bond the conductive layer and the cloth. That is, the composite layer contributes to the adhesion between the conductive layer and the fabric.
  • the cloth is a pseudo-planar material obtained by combining threads, and includes a woven fabric, a knit, and a non-woven fabric.
  • a woven fabric As the stretchable cloth, a woven fabric, a knitted fabric (knit), or a non-woven fabric can be used.
  • the woven fabric even if the yarn itself constituting the woven fabric is not stretchable, it can be expanded and contracted by using it in the bias direction. Knitting achieves high elasticity. In the case of a non-woven fabric, it becomes a stretchable cloth when the constituent threads have extensibility.
  • a knitted fabric as the fabric, particularly preferably a tricot knitted fabric, and further preferably a 2-way tricot (also referred to as a double tricot) knit fabric.
  • the yarn constituting the fabric of the present invention it is preferable to use a yarn made of fibers having high heat resistance.
  • fibers animal hair fibers such as acrylonitrile, polyester, polytriacetate, viscose rayon, cotton, silk and wool can be used.
  • heat-resistant fibers such as heat-resistant polyamide, liquid crystal polymer, aromatic polyamide, aromatic polyimide, and polyparaphenylene bisbenzoxazole can be used.
  • the average thickness of the fabric of the present invention is preferably 20 ⁇ m to 1 mm, more preferably 50 ⁇ m to 800 ⁇ m.
  • the basis weight of the fabric is preferably 100 to 300 g / m 2 , more preferably 150 to 250 g / m 2 .
  • the elastic conductive layer of the present invention a composite conductive material containing a conductive filler (conductive particles) and a flexible binder resin (flexible resin) can be used.
  • the elastic conductive layer is preferably used by laminating a first elastic conductive layer mainly using a metal filler and a second elastic conductive layer mainly using a carbon-based filler.
  • the elastic conductive layer may be formed only by the first elastic conductive layer using a metal-based filler. ..
  • the first elastic conductive layer of the present invention is preferably composed mainly of at least a metal filler (metal particles) and a flexible resin having a tensile elastic modulus of 1 MPa or more and 1000 MPa or less.
  • the blending amount of the flexible resin is preferably 7 to 35% by mass, more preferably 9 to 28% by mass, and further preferably 12 to 20% by mass with respect to the total of the metal particles and the flexible resin.
  • the total amount of the metal particles and the flexible resin contained in the first elastic conductive layer is preferably 90% by mass or more, more preferably 95% by mass or more, and further. It is preferably 100% by mass.
  • the first elastic conductive layer can be obtained by kneading and mixing metal particles and a flexible resin and molding them into a sheet shape (film shape).
  • the stretchable conductive layer of the present invention is preferably made into a paste for forming a stretchable conductor by adding a solvent or the like to metal particles and a flexible resin, or is made into a slurry, and then coated and dried to form a sheet (film). It can be processed. Further, it is also possible to give a predetermined shape by printing after making a paste.
  • the conductive particles of the present invention are preferably particles having a specific resistance of 1 ⁇ 10 -1 ⁇ cm or less and having a particle diameter of 100 ⁇ m or less.
  • Examples of the substance having a specific resistance of 1 ⁇ 10 -1 ⁇ cm or less include metals, alloys, carbons, doped semiconductors, and conductive polymers.
  • the conductive particles (metal fillers) preferably used in the present invention are metals such as silver, gold, platinum, palladium, copper, nickel, aluminum, zinc, lead and tin, alloy particles such as brass, bronze, white copper and solder, and silver.
  • Hybrid particles such as coated copper, as well as metal-plated polymer particles, metal-plated glass particles, metal-coated ceramic particles and the like can be used.
  • flake-shaped powder or amorphous agglomerated powder it is preferable to use flake-shaped powder or amorphous agglomerated powder, and it is more preferable to mainly use flake-shaped silver particles or amorphous agglomerated silver powder.
  • used mainly here means that 90% by mass or more of the conductive particles are used.
  • the amorphous agglomerated powder is a three-dimensional aggregate of spherical or amorphous primary particles. Amorphous aggregated powder and flake-shaped powder have a larger specific surface area than spherical powder and the like, and are preferable because they can form a conductive network even with a low filling amount.
  • the particle size of the flake-like powder is not particularly limited, but an average particle size (50% D) measured by a dynamic light scattering method is preferably 0.5 to 20 ⁇ m. More preferably, it is 3 to 12 ⁇ m. If the average particle size exceeds 20 ⁇ m, it becomes difficult to form fine wiring, and clogging may occur in the case of screen printing or the like. If the average particle size is less than 0.5 ⁇ m, the particles cannot be contacted with each other at low filling, and the conductivity may deteriorate.
  • Examples of the flexible resin in the present invention include thermoplastic resins, thermosetting resins, rubbers and the like having a tensile elastic modulus of 1 to 1000 MPa.
  • Urethane resin or rubber is preferable in order to develop the elasticity of the film.
  • rubber include urethane rubber, acrylic rubber, silicone rubber, butadiene rubber, nitrile group-containing rubber such as nitrile rubber and hydride nitrile rubber, isoprene rubber, sulfide rubber, styrene-butadiene rubber, butyl rubber, chlorosulfonated polyethylene rubber, and ethylene.
  • Examples thereof include propylene rubber and vinylidene fluoride copolymer.
  • nitrile group-containing rubber, chloroprene rubber, and chlorosulfonated polyethylene rubber are preferable, and nitrile group-containing rubber is particularly preferable.
  • the range of the elastic modulus more preferable in the present invention is 2 to 480 MPa, more preferably 3 to 240 MPa, still more preferably 4 to 120 MPa.
  • the rubber containing a nitrile group is not particularly limited as long as it is a rubber containing a nitrile group or an elastomer, but nitrile rubber and hydrogenated nitrile rubber are preferable.
  • Nitrile rubber is a copolymer of butadiene and acrylonitrile, and when the amount of bound acrylonitrile is large, the affinity with the metal increases, but the rubber elasticity that contributes to elasticity decreases. Therefore, the amount of bonded acrylonitrile in the acrylonitrile butadiene copolymer rubber is preferably 18 to 50% by mass, particularly preferably 40 to 50% by mass.
  • the blending amount of the flexible resin in the present invention is 7 to 35% by mass, preferably 9 to 28% by mass, more preferably 9 to 28% by mass, based on the total of the conductive particles, preferably the non-conductive particles and the flexible resin to be added. Is 12 to 20% by mass.
  • the non-stretchable specific resistance of the first stretchable conductive layer used in the present invention is preferably 3 ⁇ 10 -3 ⁇ cm or less, more preferably 1 ⁇ 10 -3 ⁇ cm or less, and 3 ⁇ 10 -3 ⁇ cm or less. It is more preferably -4 ⁇ cm or less, and even more preferably 1 ⁇ 10 -4 ⁇ cm or less. If the resistivity exceeds this range, the resistance distribution in the conductive layer becomes remarkable, the time constant of the device becomes large, a problem arises in responsiveness, and high frequency characteristics and pulse responsiveness may deteriorate.
  • the lower limit of resistivity depends on the conductive material used in principle.
  • the second elastic conductive layer of the present invention is mainly composed of a carbon-based conductive filler (carbon-based filler) and the flexible resin.
  • the blending amount of the flexible resin is preferably 7 to 35% by mass, more preferably 9 to 28% by mass, and further preferably 12 to 20% by mass with respect to the total of the carbon-based filler and the flexible resin.
  • the total amount of the metal particles and the flexible resin contained in the second stretchable conductive layer is preferably 90% by mass or more, more preferably 95% by mass or more, and further. It is preferably 100% by mass.
  • the second elastic conductive layer can be obtained by kneading and mixing a carbon-based filler and a flexible resin and molding it into a sheet shape (film shape).
  • carbon-based filler black smoke, Ketjen black, furnace black, carbon nanotube, carbon nanocone, fullerene, etc. can be used.
  • the flexible resin used in combination with the carbon-based filler and other conditions are the same as those of the metal-based filler.
  • the present invention has a structure in which a stretchable dielectric layer is sandwiched between two stretchable conductive layers.
  • the stretchable dielectric layer has a stretchable sheet-like cloth and a composite layer containing fibers and resins that contribute to the adhesion between the conductive layer and the cloth. It is also preferable that the dielectric layer further contains a resin layer.
  • the fabric is preferably an aggregate of entangled fibers, and the gap between the fibers is usually air, but in the composite layer, the resin is mixed in the gap between the fibers. However, it does not prevent the voids from remaining between the fibers.
  • a layer containing resin in a part or all of a cloth (fiber) is called a composite layer, and a layer not containing resin is called a cloth (fiber).
  • the stretchable dielectric layer includes a stretchable sheet-like cloth, and a part or all of the cloth is impregnated with the resin.
  • the resin contained in the composite layer is preferably one that can contribute to adhering the conductive layer and the fabric. Further, it is preferable that the resin layer exists between the cloth and the stretchable conductive layer and can improve the adhesiveness between the cloth (composite layer) and the stretchable conductive layer.
  • the resin and the resin layer contained in the composite layer may be the same or different, but are preferably the same.
  • the parts constituting the two elastic conductive layers may be the same or different, but are preferably the same.
  • the average thickness of the stretchable conductive layer is preferably 10 to 200 ⁇ m, more preferably 20 to 100 ⁇ m.
  • a hot melt adhesive as the resin when the elastic conductive layer is adhered and laminated on the fabric, or when the cover insulating layer is adhered to the elastic conductive layer.
  • a polymer material having a softening temperature of about 50 ° C. to 200 ° C. can be used, and it is preferable that the hot melt adhesive has flexibility having the same degree of elasticity as the dielectric layer. Molecular materials can be used.
  • Such hot melt adhesives include ethylene-based copolymers, styrene-based block copolymers, olefin-based (co) copolymers, and the like, and further use them as a base polymer to impart a crystalline polar group.
  • a liquid plasticizer such as process oil is added, modified polyolefin and its formulation, styrene-based block copolymer and its formulation, acid-modified polypropylene, acid-modified styrene-based block Polymers, blends thereof, styrene-based block copolymers, blends such as ethylene-based polymers, polyester-urethane copolymers and their blends
  • a hot melt sheet obtained by processing a polyester urethane resin, a polyether urethane resin, or the like having a softening temperature of 40 ° C to 120 ° C into a sheet can be preferably used.
  • the hot melt adhesive resin of the present invention is preferably a stretchable insulating polymer having a tensile yield elongation of 70% or more.
  • the average thickness of the resin layer is preferably 10 to 200 ⁇ m, more preferably 20 to 100 ⁇ m.
  • the flexible sheet is a sheet made of a stretchable flexible material having a relatively high heat distortion temperature, and a sheet made of crosslinked polyurethane, crosslinked rubber, silicone rubber sheet, fluororubber sheet, or other crosslinked elastomer can be used.
  • the first release paper was peeled off and removed.
  • a cover insulating layer with a hot-melt adhesive layer which has been subjected to external processing including a window by punching at a predetermined position in advance, is laminated on the elastic conductive layer.
  • both are pressurized and heated to be bonded to obtain an elastic conductor component.
  • the obtained elastic conductor parts are in a form protected by release paper on both sides.
  • the elastic conductive layer is in a state where the surface and the side surface are all covered with the cover insulating layer or the hot melt adhesive layer, and only the window portion previously formed by punching in the cover insulating layer is not insulated.
  • FIGS. 8 (I) to 8 (L) the parts of the stretchable conductive layer are attached to the front and back surfaces of the fabric to obtain the stretchable capacitor of the present invention.
  • the third release paper is peeled off.
  • FIG. 8 (J) two front and back elastic conductive layer parts are arranged with the cloth sandwiched between them, and in FIG. 8 (K), the whole is pressurized and heated to be laminated.
  • FIG. 8 (L) the second release paper left on the front and back is removed to obtain the elastic capacitor of the present invention.
  • FIG. 1 illustrates a cross section of the elastic capacitor obtained in FIG. 8 (L) with a snap fastener 800 functioning as a connector for external connection attached.
  • the stretchable conductive layer is shown in a two-layer structure consisting of a first stretchable conductive layer and a second stretchable conductive layer.
  • the flexible sheet shown in FIGS. 7 and 8 is sandwiched between the third hot melt adhesive layer and the first hot melt adhesive layer, and here, the third hot melt adhesive layer is used.
  • the illustration is omitted because it is considered to be included.
  • the portion where the elastic conductive layers on the front and back faces each other with the cloth sandwiched therein is a substantial capacitor element, and this portion S is the sensing region.
  • the T portion located outside the snap fastener portion in the figure is a sewable region that does not affect the sensing region. Since the fabric exists in the entire region, the elastic capacitor can be sewn on the entire surface, but it is preferable that the woven portion does not enter the sensing region as much as possible from the viewpoint of sensing accuracy and stability.
  • the composite layer containing the resin and the fiber exists only in the surface layer of the fabric, and the resin does not penetrate into the central portion (in the thickness direction) of the fabric. Therefore, what functions as a dielectric layer is a composite layer on the front and back surfaces and a fabric layer that is not impregnated by the resin. It is preferable to use a metal snap fastener, and a stainless steel material is preferable as the material.
  • FIG. 2 is a schematic view showing a cross-sectional structure of another example of the aspect of the stretchable capacitor used in the present invention.
  • most of the stretchable conductive layer is the first stretchable conductive layer, and the second stretchable conductive layer is used only in the portion in contact with the snap fastener.
  • the material of the metal filler used for the first elastic conductive layer and the material of the snap fastener are dissimilar metals, the battery is locally formed when the elastic capacitor comes into contact with a liquid containing electrical material such as sweat. And any metal galvanic corrosion may occur.
  • a conductive coating made of a carbon-based conductive material is used for the contact point with the metal.
  • FIG. 3 is a schematic view showing a cross-sectional structure of another example of the aspect of the stretchable capacitor used in the present invention.
  • the resin of the hot melt adhesive penetrates to the center of the fabric, and the thickness of the composite layer containing the resin and the fiber is substantially equal to the thickness of the fabric. That is, the dielectric layer of the elastic capacitor is virtually all a composite layer, and high dielectric constant liquids such as moisture and sweat or electrolytes are prevented from entering the sensing region between the electrodes. Disturbance is reduced.
  • FIG. 4 is a schematic view showing a cross-sectional structure of another example of the aspect of the stretchable capacitor used in the present invention.
  • the resin hot melt adhesive layer
  • the conductive layer is relatively thin, and almost all of the resin permeates the fabric, and the portion is a composite layer. It shows the state. Since the thickness of the dielectric layer is thin, the capacitance is increased and the measurement sensitivity is increased.
  • the stretchable conductor component in the form in which the cover insulating layer is previously bonded to the stretchable conductor is used.
  • FIG. 5 is a schematic view showing a cross-sectional structure of another example of the aspect of the stretchable capacitor used in the present invention.
  • the cross-sectional structure obtained when the elastic conductive layer is first adhered to the fabric and then the cover insulating layer is adhered is shown.
  • the dielectric layer can be made thinner.
  • the stretchable capacitor of the present invention preferably has a stress of 15 N / cm or less at the time of 20% elongation in the plane direction.
  • the stress during elongation depends on the physical characteristics of the material constituting the stretchable capacitor and the thickness of the detection portion of the stretchable capacitor.
  • the total thickness it is preferable to configure the total thickness to be 700 ⁇ m or less, preferably 450 ⁇ m or less, and more preferably 250 ⁇ m or less.
  • the present invention is a garment for the upper body of the human body, and sensing in which the elastic capacitor is arranged at least at any of the elbow portion, the upper arm circumference, the lower arm circumference, the shoulder portion, the back, the chest circumference, the abdominal circumference, and the flank portion.
  • it is a garment for the lower half of the human body, and is a sensing wear in which the elastic capacitor is arranged at least at any of the knee part, the ankle part, the thigh part, the shin part, the hip joint part, and the waist part. You can also do it.
  • the shape is a glove
  • the sensing wear may be a sensing wear in which the elastic capacitor is arranged at least at one or more of each joint of the wrist and the finger.
  • it is a sock-shaped sensing wear in which the elastic capacitor is arranged at least at one or more of each joint of the ankle and the toe.
  • a belt-shaped sensing wear using an elastic material can also be used.
  • the stretchable capacitor can be sewn and attached to the fabric of the above-exemplified garment. That is, it can be made into sensing wear by sewing.
  • the sewing may be machine-sewn with a sewing machine or hand-sewn.
  • the thread for sewing is not particularly limited, and a sewing thread made of a general insulating material may be used.
  • the sewn portion is only the peripheral portion of the elastic capacitor.
  • the peripheral portion refers to a portion having a width of 8 mm from the outer shape of the elastic capacitor element. In the present invention, it is preferable to sew only the periphery of the elastic capacitor element like an appliqué.
  • the sewing range (the length of the sewn portion) is set to 50% or less, preferably 30% or less of the peripheral length of the expansion / contractor capacitor, thereby reducing the discomfort felt by the wearer with respect to the sensing wear. can do.
  • the lower limit is not particularly limited, but is preferably 3% or more, and more preferably 5% or more.
  • the deformation and strain amount of the sensing area can be read by measuring the capacitance between the conductor layers on the front and back of the elastic capacitor.
  • the elastic capacitor of the present invention can be attached to clothes by sewing, and the clothes to which the elastic capacitor which is a sensing element is attached by sewing appropriately exceeds the fixed areas of both. As a result, the wearer is less likely to feel discomfort or discomfort.
  • the sensing wear of the present invention can sense the posture of the body, the pulse, the heartbeat, the respiration, etc. due to the change in the circumference of the body, and can be further applied to motion capture. Further, the present invention can be applied not only to the human body but also to animals and mechanical devices.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
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Abstract

La présente invention fournit : un condensateur étirable qui a une structure qui peut être cousue sur un tissu de vêtement ; et un système de détection à porter sur soi qui utilise ce condensateur.　Un condensateur a une structure en couches dans laquelle au moins une couche conductrice étirable, une couche diélectrique étirable et une couche conductrice étirable sont séquentiellement empilées dans cet ordre. La couche diélectrique étirable a une structure qui comprend un tissu de type feuille étirable, et une couche composite qui contient une résine et des fibres qui contribuent à une liaison du tissu et des couches conductrices. Un condensateur étirable ayant cette structure peut être cousu sur un tissu de vêtement, et est ainsi capable d'augmenter le degré de liberté lors d'une déformation du tissu par rapport à des condensateurs étirables qui sont liés en surface à l'aide d'un adhésif thermofusible ou analogue, ce qui permet de réduire une sensation d'étrangeté ou d'inconfort ressentie par un porteur.
PCT/JP2021/029495 2020-09-14 2021-08-10 Condensateur étirable et système de détection à porter sur soi WO2022054487A1 (fr)

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JP2020-153932 2020-09-14

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014204323A1 (fr) * 2013-06-17 2014-12-24 Stretchsense Limited Capteurs textiles étirables
WO2018037855A1 (fr) * 2016-08-25 2018-03-01 グンゼ株式会社 Dispositif portable de détection d'un mouvement de corps humain et dispositif de surveillance d'un mouvement de corps humain

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014204323A1 (fr) * 2013-06-17 2014-12-24 Stretchsense Limited Capteurs textiles étirables
WO2018037855A1 (fr) * 2016-08-25 2018-03-01 グンゼ株式会社 Dispositif portable de détection d'un mouvement de corps humain et dispositif de surveillance d'un mouvement de corps humain

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