WO2022054488A1

WO2022054488A1 - Elastic capacitor and sensing wear

Info

Publication number: WO2022054488A1
Application number: PCT/JP2021/029496
Authority: WO
Inventors: 雄一郎表; 翔太森本; 達彦入江; 祐輔清水; 郷司前田
Original assignee: 東洋紡株式会社
Priority date: 2020-09-14
Filing date: 2021-08-10
Publication date: 2022-03-17
Also published as: JPWO2022054488A1

Abstract

Provided are: an elastic capacitor having a structure capable of being sewn to a clothing fabric; and a sensing wear using said capacitor.　This elastic capacitor has a configuration in which an elastic dielectric layer is sandwiched by two elastic electrically-conductive layers, the elastic capacitor being characterized in that: the elastic electrically-conductive layers each have a sheet-like fabric that can be stretched, and a composite layer including a resin and electrically-conductive fibers contributing to bonding of the elastic dielectric layer and electrically-conductive layers. The elastic capacitor having said structure can be sewn to a clothing fabric, and thus, can have a higher degree of freedom in deformation of the fabric as compared with an elastic capacitor that is face-bonded using a hot-melt adhesive or the like, thereby reducing a wearer's sense of discomfort and feeling of physical disorder.

Description

Elastic capacitors and sensing wear

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.

A method of optically capturing the state of the body and the movement of facial expressions, converting them into data, reflecting them in CG, and moving a human body model or the like in a virtual space has been put into practical use as a production method for movies and the like. Such a method requires a large-scale device.
On the other hand, in order to detect changes in the shape of the body and the state of movement, attempts have been made to incorporate various sensors into clothes for measurement.
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.

Japanese Patent No. 4650538 Japanese Unexamined Patent Publication No. 7-75630 Japanese Patent No. 62574444 Japanese Patent No. 6264825

As described above, many attempts have been made to attach a strain sensor or a displacement sensor to clothing to detect a posture including movements of the wearer's limbs, or even finer movements such as heartbeat, pulse, and respiration.
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.

When attaching these sensor elements to clothing fabric, as seen in the prior patent documents, an adhesive 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.
When 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. However, if a large-area sensor element is attached to a garment, the degree of freedom of deformation in a considerable area of the garment fabric is hindered. 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.

As a result of diligent studies to achieve the above object, 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. By sewing the fabric on the fabric, we have found sensing wear that reduces the discomfort of wearing by suppressing the inhibition of the degree of freedom of deformation of the fabric as much as possible, and have reached the following invention.

That is, 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.
The stretchable conductive layer has a stretchable sheet-like fabric and a composite layer containing a conductive fiber and a resin that contributes to adhesion between the stretchable dielectric layer and the conductive layer. Sex capacitor.
[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 characterized in that the stretchable conductive layer is composed of a resin layer and a composite layer containing conductive fibers and a resin.
[5] In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
A stretchable capacitor characterized in that the stretchable conductive layer is a composite layer containing a conductive fiber and a resin.
[6] A. Of [1] to [5], wherein a part or all of the surface of the elastic conductive layer opposite to the dielectric layer is covered with the elastic insulating layer. The elastic capacitor described in either.
[7] Sensing wear characterized in that the elastic capacitor according to any one of [1] to [6] is sewn.
[8] The sensing wear according to [7], wherein the stretchable capacitor is sewn only on the peripheral portion of the stretchable capacitor.
[9] The sensing wear according to [7] or [8], wherein the elastic capacitor is sewn to be 50% or less of the peripheral length of the elastic capacitor.

The present invention further preferably has the following configuration.
[10] 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.
[11] The elastic capacitor according to [1] and the sensing wear according to [7], wherein the elastic conductive layer constituting the elastic capacitor has a sheet resistance of 3 Ω / _□ or less.
[12] The elastic capacitor according to [1] and the sensing wear according to [7], wherein the conductive fiber contained in the elastic conductive layer is a non-conductive fiber coated with metal.
[13] The elastic capacitor according to [1] and the sensing wear according to [7], wherein the conductive material used for the conductive fiber contained in the elastic conductive layer is a carbon-based material.
[14] The elastic capacitor according to the above [1] and the elastic capacitor according to the above [7], wherein the conductive material used for the conductive fiber contained in the elastic conductive layer is a conductive polymer material. Sensing wear.
[15] The elastic capacitor according to [1] and the sensing wear according to [7], wherein the conductive fiber contained in the elastic conductive layer contains a thin metal wire.
[16] The softening temperature of the resin constituting the composite layer containing the conductive fiber and the resin that contributes to the adhesion between the elastic dielectric layer and the conductive layer is 50 ° C. or higher and 200 ° C. or lower [1]. ] The elastic capacitor according to [7] and the sensing wear according to [7].
[17] The resin constituting the composite layer containing the conductive fiber and the resin that contributes to the adhesion between the elastic dielectric layer and the conductive layer is an elastic insulating polymer having a tensile yield elongation of 70% or more. The elastic capacitor according to [1] and the sensing wear according to [7].
[18] The stretchable capacitor according to [1] and the sensing wear according to [7], wherein the stress at 20% elongation in the plane direction of the stretchable capacitor is 15 N / cm or less.
[19] It is a garment for the upper body of the human body, and the elastic condenser is placed at least in any of the elbow part, the upper arm circumference, the lower arm circumference, the shoulder part, the back, the chest circumference, the abdomen circumference, and the flank part. The sensing wear according to [7], which is a feature.
[20] It is a garment for the lower half of the human body, and is characterized in that 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. The sensing wear according to [7].
[21] The sensing wear according to [7], which has a glove shape and is characterized in that the elastic capacitor is arranged at least at one or more of one or more joints of wrists and fingers.
[22] The sensing wear according to [7], which has a sock shape and is characterized in that the elastic capacitor is arranged at least in one or more of one or more joints of ankles and toes.
[23] The sensing wear according to [7], which has a belt shape using an elastic material.

The stretchable capacitor of the present invention uses a cloth containing conductive fibers in a part of the conductive layer (hereinafter, may be abbreviated as "conductive cloth"). Here, 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. In the present invention, 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. However, when the sheet member sewn in the world is deformed, a large deformation stress is applied to the vicinity of the hole through which the sewing thread penetrates, and the sheet member is easily broken. Therefore, it cannot be practically used in sensing wear that is subject to a large deformation load when it is attached / detached or washed.
However, in the present invention, since the conductive 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.

The fact that it can be attached by sewing means that there are more variations in the form of attaching elastic capacitors to clothes than when attaching with hot melt adhesive. That is, when a hot melt adhesive is used, the entire surface is adhered to the garment fabric by press working, but in the case of sewing, it is easy to limit the part to be fixed to the garment fabric to a part of the area. It becomes. For example, if only the peripheral part of the rectangle is sewn in an applique manner (assuming that the elastic capacitor is a rectangle), the central part of the rectangle can be made free and the degree of freedom of clothes deformation can be increased. For example, if only the short side of the rectangle is sewn, the degree of freedom is further increased. As an extreme example, it is easy to attach it by fixing only the corners of the rectangle. Even when a hot melt adhesive is used, it is possible to apply the adhesive in a limited area in the same manner, but it is necessary to limit the area in which the adhesive is placed in advance. In addition, even if the pasting area is limited, a certain area is required, so the degree of restraint of the garment fabric is greater than that of sewing that can be attached at "points", and it is attached at night for sewing. Is superior.

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. In this example, most of the conductive layer is covered with a cover insulating layer, and a metal snap fastener is attached as a connector for making electrical contact with the capacitor. About half of the conductive cloth is embedded in the hot melt adhesive layer, and the embedded portion is a composite layer containing conductive fibers and resin. 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. This example is an embodiment in which the conductive layer (conductive fabric) is thicker than the hot melt adhesive layer. 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. In this example, almost all of the conductive layer (conductive cloth) is embedded in the hot melt adhesive layer. FIG. 4 is a schematic view showing a cross-sectional structure in which the relationship between the conductive cloth and the resin in the conductive layer of FIG. 1 is enlarged. FIG. 5 is a schematic view showing a cross-sectional structure in which the relationship between the conductive cloth and the resin in the conductive layer of FIG. 2 is enlarged. FIG. 6 is a schematic view showing a cross-sectional structure in which the relationship between the conductive cloth and the resin in the conductive layer of FIG. 3 is enlarged. FIG. 7 is a process diagram showing an outline of an example of the method for manufacturing a stretchable capacitor of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 7 is a process diagram showing an outline of a manufacturing method for obtaining the stretchable capacitor of the present invention. In step (A), the main members for creating the core portion of the stretchable capacitor of the present invention are illustrated. The hot melt adhesive layer 300 is arranged on both the front and back surfaces of the stretchable dielectric layer (flexible sheet) 600. This flexible sheet portion is the main portion of the dielectric layer of the capacitor. A dielectric layer (conductive fabric) 700 is arranged on the outside of the hot melt adhesives on the front and back surfaces, and a release paper 400 is arranged on the outside thereof.
Step (B) illustrates a state in which the above members are overlapped with each other.
In step (C), a state in which pressurization and heating are performed from both sides by a press or the like is shown. The hot-melt adhesive layer is softened by heating, the conductive fabric is buried in the hot-melt adhesive layer by pressure, and the buried portion becomes a stretchable composite layer containing conductive fibers and resin. The composite layer can bond the dielectric layer (flexible sheet) and the conductive layer. That is, the composite layer contributes to the adhesion between the conductive layer and the fabric.
By peeling off the release papers on the front and back in the step (D), the core portion of the elastic capacitor of the present invention can be obtained. In reality, an insulating cover layer or the like that protects the conductive layers on the front and back is provided.

The dielectric layer (flexible sheet) 600 is a sheet made of a flexible material that is flexible and at the same time has a relatively high thermal deformation temperature and is expandable. From crosslinked polyurethane, crosslinked rubber, silicone rubber sheet, fluororubber sheet, and other crosslinked elastomers. Sheet can be used. The thickness of the flexible sheet preferably in the present invention is 3 μm or more, more preferably 12 μm or more, still more preferably 24 μm or more. The upper limit of the thickness of the flexible sheet is 500 μm, preferably 210 μm or less, and more preferably 105 μm or less. By setting the thickness of the flexible sheet within a predetermined range, it is possible to obtain sufficient mechanical strength of the elastic capacitor and a capacitance that is easy to handle as a sensor.

As the cloth structure of the conductive cloth 700, a stretchable woven fabric, a knit, or a non-woven fabric can be used. Here, the cloth is a pseudo-planar material obtained by combining threads, and includes a woven fabric, a knit, and a non-woven fabric. As for 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.
In the present invention, it is preferable to use a knitted fabric as the fabric, particularly preferably to use a tricot knitted fabric, and further preferably to use a 2-way tricot (also referred to as double tricot) fabric.
The conductive cloth of the present invention (hereinafter, also referred to as a conductive cloth) may be composed of only conductive threads, or may be a cloth using a combination of conductive threads and non-conductive threads. As the conductive yarn, monofilament of conductive fiber, multifilament of conductive fiber, spun yarn of conductive fiber, span yarn containing conductive fiber and non-conductive fiber, mixed wire thread of conductive fiber and non-conductive fiber, etc. may be used. can.

As the conductive fiber of the present invention, a metal-coated non-conductive fiber can be used. More specifically, fibers obtained by coating non-conductive fibers such as nylon, polyester and acrylic fibers with metals such as silver, copper, gold, nickel and chromium can be used. As a coating method, a wet plating method such as electroless plating or electrolytic plating, a dry plating method such as thin film deposition or sputtering, or a combination of both can be used. A method in which a nickel-chromium alloy is thinly coated by a method such as sputtering and then thickly plated with copper, silver, nickel, gold or the like by electroplating or the like can be preferably used.

In the present invention, fibers using a carbon-based material as a conductive material can be used. As the carbon-based material, carbon nanotubes, carbon nanocorns, fullerene, graphene, etc. can be used. These carbon-based conductive materials are mixed with fiber materials such as polyester, polyamide, polyacrylamide, etc. and spun. , A method of coating the surface of non-conductive fibers as in the case of metal coating, and a core-sheath fiber method consisting of a core containing a large amount of carbon-based material and a sheath composed of a resin layer having relatively high insulation. can do.

In the present invention, a conductive polymer material can be used as the conductive material. The conductive polymer material is not particularly limited as long as it is a polymer exhibiting conductivity, and is, for example, an acetylene system or a complex 5-membered ring system (as a monmer, pyrrole, 3-methylpyrrole, 3-methylpyrrole, 3-. 3-alkylpyrroles such as ethylpyrrole and 3-dodecylpyrrole; 3,4-dialkylpyrroles such as 3,4-dimethylpyrrole and 3-methyl-4-dodecylpyrrole; N such as N-methylpyrrole and N-dodecylpyrrole. -Alkylpyrrole; N-alkyl-3-alkylpyrrole such as N-methyl-3-methylpyrrole and N-ethyl-3-dodecylpyrrole; thiophene, a pyrrole-based polymer obtained by polymerizing 3-carboxypyrrole and the like. (System polymers, isotianaften-based polymers, etc.), phenylene-based, aniline-based conductive polymers, copolymers thereof, ionic liquids, and the like can be mentioned.
Further, in a conductive polymer, a dopant has an effect on its conductivity, and the dopant used here includes halide ions such as chloride ion and bromide ion, perchlorite ion, tetrafluoroborate ion, and hexafluoric acid ion. Phosphate-based ions such as hydride ion, sulfate ion, nitrate ion, thiocyanate ion, silicate ion hexafluoride, phosphate ion, phenylphosphate ion, phosphate ion hexafluoride, trifluoroacetate ion, tosylate ion, ethylbenzene Alkyl benzene sulfonic acid ion such as sulfonic acid ion and dodecylbenzene sulfonic acid ion, alkyl sulfonic acid ion such as methyl sulfonic acid ion and ethyl sulfonic acid ion, polyacrylic acid ion, polyvinyl sulfonic acid ion, polystyrene sulfonic acid ion, poly (2) -At least one kind of high molecular weight ion such as acrylamide-2-methylpropanesulfonic acid) ion is used. The amount of the dopant added is not particularly limited as long as it has an effect on conductivity. As the conductive polymer, polypyrrole, PEDOT (poly 3,4-ethylenedioxythiophene) / poly 4-styrene sulfonate (PSS), polyaniline, polyparaphenylene vinylene (PPV) and the like are easily resinified. It is preferably used as a conductive resin. In particular, PEDOT / PSS (Shin-Etsu Polymer Co., Ltd., SEP LYGIDA (registered trademark)) obtained by doping PEDOT, a thiophene-based conductive polymer, with poly4-styrene sulfonate PSS is particularly suitable from the viewpoint of safety and processability. ..
The conductive polymer material may be applied to a method of mixing with a resin and spinning in the same manner as a carbon-based material, or may be applied to a method of coating non-conductive fibers. A method of impregnating ultrafine fibers with a conductive polymer is also a preferred embodiment.

In the present invention, a thin metal wire can be used as the conductive thread or the conductive fiber. As the fine metal wire, in addition to gold and silver having high ductility, fine wire made of stainless steel can be preferably used.

As the non-conductive yarn when the conductive yarn and the non-conductive yarn are mixed and used in the present invention, it is preferable to use a yarn made of fibers having relatively high heat resistance. As the fibers preferably used, animal hair fibers such as acrylonitrile, polyester, polytriacetate, viscose rayon, cotton, silk and wool can be used. Further, heat-resistant fibers such as heat-resistant polyamide, liquid crystal polymer, aromatic polyamide, aromatic polyimide, and polyparaphenylene bisbenzoxazole can be used.

In the present invention, it is preferable to use a hot melt adhesive when the conductive cloth is adhered and laminated on the dielectric layer (flexible sheet), or when the cover insulating layer is adhered to the conductive cloth or the elastic conductor layer. As the hot melt adhesive in the present invention, a polymer material having a softening temperature of about 50 ° C. to 200 ° C. can be used, and a polymer having flexibility having the same degree of elasticity as a flexible sheet is preferable. 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. Polymer materials containing compounds, amorphous poly α-olefins, tackifier resins, polypropylene waxes and other formulations, styrene-ethylene propylene-styrene block copolymer rubber or styrene-butadiene-styrene block copolymer rubber, and these. Adhesive-imparting resin component and / or polymer material to which 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 can be used.

In the present invention, 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. By burying part or all of the conductive cloth in the hot melt adhesive layer, a composite layer containing conductive fibers and resin is formed, and this portion functions as an elastic conductive layer.

FIG. 1 illustrates a cross section of the elastic capacitor obtained in FIG. 7 (D) with an insulating cover layer and a snap fastener 800 functioning as a connector for external connection attached. The portion where the elastic conductive layers on the front and back face each other with the dielectric layer (flexible sheet) sandwiched therein is a substantial capacitor element, and this portion S is the sensing region. Further, the T portion located outside the snap fastener portion in FIG. 1 is a sewable region that does not affect the sensing region. That is, the portion where the conductive cloth is present is the sewable area. The portion of the elastic capacitor including the conductive cloth can be sewn on the entire surface, but it is preferable that the sewn portion does not enter the sensing region as much as possible from the viewpoint of sensing accuracy and stability. The snap fastener is preferably made of metal, and the material is preferably stainless steel. The first hot melt adhesive layer is a hot melt adhesive layer arranged between the conductive cloth and the flexible sheet, and the second hot melt adhesive layer is arranged between the cover insulating layer and the conductive layer. It is preferable that it is a thing.

2 and 3 show morphological changes that can be taken by the present invention depending on the thickness of the hot melt adhesive layer and the conductive cloth, the heating and pressurizing temperature conditions, the pressurizing and heating time, and the like.
4 to 6 are schematic views showing an enlarged cross-sectional structure of the conductive cloth and the resin of FIGS. 1 to 3, respectively. Although the conductive cloth layer is shown in the cross-sectional structure of the plain weave cloth in FIGS. 4 to 6 for convenience, the woven structure or knitted structure of the cloth cloth of the present invention is not limited to this figure. ..

In the present invention, the change in capacitance of the elastic capacitor that changes according to the expansion and contraction deformation of the elastic capacitor in the surface direction is mainly due to the expansion and contraction of the elastic dielectric layer in the surface direction, and the thickness of the elastic dielectric layer. It is a change in capacitance due to a change in direction. In order to exhibit such characteristics, it is preferable that the Poisson's ratio of the material used for the elastic dielectric layer is high. The Poisson's ratio of the stretchable dielectric layer of the present invention is preferably 0.28 or more, more preferably 0.38 or more, and even more preferably 0.48 or more. In order to increase the Poisson's ratio, it is better that the amount of inorganic components blended in the elastic dielectric layer is small.

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. In particular, when a resin and a fabric satisfying the above-mentioned conditions are used, it is preferable to configure the total thickness to be 700 μm or less, preferably 450 μm or less, and more preferably 250 μm or less.

In the present invention, it 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. Can be wear.
In the present invention, 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.
In the present invention, the shape is a glove, and 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.
In the present invention, 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.
In the present invention, a belt-shaped sensing wear using an elastic material can also be used.

In the present invention, 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.
It is preferable that the sewing is performed only on 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. Further, more preferably, 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 elastic capacitor, so that the wearer feels uncomfortable with the sensing wear. Can be reduced. The lower limit is not particularly limited, but is preferably 3% or more, and more preferably 5% or more.
In the present invention, 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.

As described above, 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.

300: Hot melt adhesive layer
310: First hot melt adhesive layer
320; Second hot melt adhesive layer
400: Release paper
500: Cover insulation layer
600: Dielectric layer (flexible sheet)
700: Conductive layer (conductive fabric)
750: Conductive layer (composite layer of conductive fiber and resin)
800: Snap fastener
S: Sensing area
T: Sewn area

Claims

In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
The stretchable conductive layer includes a fabric and a composite layer, the fabric and the composite layer are stretchable, the composite layer contains a conductive fiber and a resin, and the composite layer adheres to the dielectric layer and the conductive layer. A stretchable capacitor characterized by contributing.
The stretchable capacitor according to claim 1, wherein the stretchable sheet-shaped cloth is a knit cloth having a 2-way tricot structure.
The stretchable capacitor according to claim 1 or 2, wherein the stretchable dielectric layer further has a resin layer.
In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
The elastic conductive layer includes a resin layer and a composite layer, the resin layer and the composite layer have a stretchable back, the composite layer contains a conductive fiber and a resin, and the composite layer is a dielectric layer and a conductive layer. A stretchable capacitor characterized by contributing to adhesion.
In an elastic capacitor having a structure in which an elastic dielectric layer is sandwiched between two elastic conductive layers.
The elastic conductive layer is a composite layer, and the composite layer contains a conductive fiber and a resin, and the composite layer contributes to adhesion between the dielectric layer and the conductive layer.
The invention according to any one of claims 1 to 5, wherein a part or all of the surface of the elastic conductive layer opposite to the dielectric layer is covered with the elastic insulating layer. Elastic capacitor.
Sensing wear characterized in that the elastic capacitor according to any one of claims 1 to 6 is sewn.
The sensing wear according to claim 7, wherein the sewn portion of the stretchable capacitor is only the peripheral portion of the stretchable capacitor.
The sensing wear according to claim 7 or 8, wherein the length of the sewn portion of the stretchable capacitor is 50% or less of the peripheral length of the stretchable capacitor.