JP2021088801A - Anthropometric instrument and body size measuring method, clothes selection system and custom-made clothes design system - Google Patents

Abstract

To provide a clothes-type anthropometric instrument capable of automatically measuring a body size by just being worn.SOLUTION: A capacitor 31 including a layer construction formed by laminating favorably in order of an elastic conductor layer, an elastic dielectric layer, and an elastic conductor layer, the capacitor being comprised of the elastic conductor layer with a specific resistance of equal to or less than 1×10-3 Ω cm, and the elastic dielectric layer composed of an elastic insulating polymer with a tensile yield elongation of 70% or more, and having reversible elasticity is attached to clothes formed of an elastic material. This configuration can automatically measure a body size by detecting a change in electrostatic capacity as deformation information.SELECTED DRAWING: Figure 9

Description

The present invention relates to a garment-type body measuring device for measuring the size of each part of the body simply by wearing it like a garment without using a height gauge, a tape measure, etc. The present invention relates to a clothing-type body measuring instrument capable of measuring body size by using a capacitor having reversibly elastic elasticity that can be detected as a change in capacitance, and a method for measuring body size using them. Furthermore, the present invention relates to a system for selecting appropriate clothing from existing clothing using the body size data obtained from the data, and a system for designing custom-made clothing using the obtained body size data.

Normally, when custom-made clothes are made, a specialist measures the dimensions of key points of the body using a height gauge, a tape measure, etc., and designs and manufactures the clothes based on the obtained data. Attempts have been made for a long time to automate such expert measurements.

Patent Document 1 proposes a method of measuring three-dimensional information of a subject using a television camera that orbits the subject 360 degrees and deriving the size of each important point from the three-dimensional information of the subject. It is easily understood that such a method would require large-scale machinery and would limit the installation location.

Patent Document 2 describes an accessory that is attached to the body surface in close contact with the body, a sensor that is attached to the accessory and whose physical characteristics change according to bending deformation, and a shape of a sensor attachment portion due to a change in the characteristics of the sensor. An anthropometric instrument equipped with an arithmetic unit for calculating the above has been proposed. In the proposal, the illustrated sensor is an optical fiber. Since the transmission loss of an optical fiber changes as it bends, the degree of deformation of the sensor can be obtained from it, and the change in body shape can be obtained. However, although indirect bending deformation and the like can be detected by this method and the measuring instrument, the body size of the subject itself cannot be measured.

Patent Document 3 discloses a method for performing anthropometry, an apparatus for carrying out the method, and a system for producing anthropometry and clothing. The present technology includes an electrically detectable means that attaches an adjustable measuring tape to a key point of clothing and generates an electrical signal according to the adjustment position of the measuring tape, and measures while wearing clothing. The length of the tape is adjusted to fit the body, and the result is electrically read to measure the body size. Here, as the information obtained from the tape, the resistance value, the capacitance, and the inductance are exemplified, but the technique described in detail as an example is only a means for optically reading the scale using a tape with a scale. is there. The fitting of the measuring tape to the body is not done automatically. In other words, this technology is a mechanism in which an optically readable linear encoder is installed in the key points of the clothes in advance, the size of the key points of the clothes is adjusted to fit the body in the attached state, and the result is electrically read. It is understandable, and body size is not always measured automatically.

Patent Document 4 discloses an apparatus and a method for providing a custom garment. The technique uses a stretch bodysuit with a benchmark showing its position at a major location and a line connecting the major locations, wears the bodysuit, and optically reads the position information of the benchmark to shape the body shape. Is three-dimensionally measured and processed into information necessary for clothing design using a computer. Such technology can be interpreted as an application of motion capture technology used in movie production, etc., and it can be understood that it is a large-scale system that requires an optical measuring means such as a moving image camera in addition to measuring clothes. ..

Patent Document 5 discloses an elastic sensor mesh system for three-dimensional measurement and its applied technology. This technology wears a sensor array consisting of an elastic mesh and a sensor that can transmit position information placed at the intersection of the mesh, and obtains three-dimensional shape information of the body by motion capture, which is necessary for clothing design. It does not require the amount of physical features.

Patent Document 6 proposes a technique relating to an anthropometry method and a garment manufacturing system. In this proposal, the subject is made to wear a measurement suit having measurement elements for measuring the physical features required for clothing design, and the physical features obtained from each measurement element are electrically collected and stored in a database. The system to be used is disclosed. It is disclosed that the output of the body shape measuring element is in the form of any one or more of pressure, strain, conductivity, resistance, current and electric power. However, the technique specifically exemplified in the patent document uses an elastic material as a measurement element, and the elastic material is conductive such as nanowire array, silver, copper oxide, zinc oxide, carbon nanotube, and graphene. An elastic material containing a sex material as a component is exemplified, and it is a technique for obtaining an amount of expansion and contraction from an electrical property value that changes depending on the amount of expansion and contraction. In this case, the available electrical property value is the electrical resistance value of the stretchable material, but the stretchable conductive material using the conductive filler as exemplified as the stretchable material is repeatedly stretched between the fillers. The electrical contact state of the is easily changed, it is difficult to obtain a stable initial resistance value, and it is necessary to calibrate the initial value every time.

Patent Document 7 has, as a self-measurement garment, a garment obtained of an elastic cloth and a conductive fiber that is integrated with the elastic cloth and stretches together with the elastic cloth when the cloth is attached. A measuring device for determining the size of a body by determining the amount of elongation from electrical characteristics is disclosed. Inductance is exemplified here as the electrical characteristics of conductive fibers. That is, in this technique, the amount of deformation of the elastic cloth is obtained from the change in the inductance generated by sewing conductive fibers on the elastic cloth in a zigzag pattern due to the deformation of the zigzag pattern. The change in inductance is not easily affected by the change (deterioration) in the conductivity of conductive fibers, but is easily affected by the electromagnetic field of the environment, and noise is likely to enter in an environment where many electric devices exist.

Japanese Patent No. 4308873 Japanese Unexamined Patent Publication No. 2009-153855 U.S. Pat. No. 4,635,67 U.S. Pat. No. 6415199 U.S. Pat. No. 6,957,164 International Patent WO2013188908 A1 Gazette International Patent WO2015181661 A1 Gazette

The present invention has been made in view of such circumstances, and an object of the present invention is a clothes-type measuring instrument capable of measuring body size just by wearing it, and data acquisition by pitching regardless of the usage environment. It is possible to provide an instrument for body measurement that is possible, has excellent durability, does not affect the measurement accuracy even after repeated washing, and can be used without imposing an excessive load on the subject.

As a result of diligent studies to achieve the above object, the present inventors have found a reversibly elastic capacitor that can be applied as a sensor, and wear the reversibly elastic capacitor by combining it with clothing. It is a clothing-type measuring instrument that can measure body size just by doing it, and it is possible to acquire data with pitch regardless of the usage environment, and it is also excellent in durability, and the measurement accuracy is affected even if repeated washing is performed. In addition, we have invented an anthropometric instrument that can be used without giving an excessive load to the subject.

That is, the present invention has the following configuration.
[1] An anthropometric instrument having a garment made of an elastic material and an element attached so as to follow the deformation of the garment and presenting deformation information according to the stretch deformation.
An anthropometric instrument characterized in that the element that presents deformation information according to the expansion and contraction deformation is a capacitor that has reversible elasticity, and the deformation information is a change in capacitance.
[2] The reversibly stretchable capacitor is a capacitor having a layer structure in which a stretchable conductor layer, a stretchable dielectric layer, and a stretchable conductor layer are laminated in this order, and is a capacitor of the stretchable conductor layer. The description according to [1], wherein the stretchable dielectric layer has a specific resistance of 1 × 10-3 Ωcm or less and is made of a stretchable insulating polymer having a tensile yield elongation of 70% or more. Anthropometric instrument.
[3] The body measurement instrument according to [1] or [2], wherein the stress at 20% elongation in the plane direction of the reversibly elastic capacitor is 15 N / cm or less.
[4] It is an integrated garment that covers at least from the upper body of the human body to the buttocks, and the reversibly elastic capacitor is attached to at least one of the chest circumference, the abdomen circumference, and the buttocks circumference. The anthropometric instrument according to any one of [1] to [3], which is a feature.
[5] An integrated garment that covers at least the upper body to the lower abdomen of the human body, and reversibly stretches the section from at least one of the left and right shoulders to the back, or from the shoulders to the abdomen to the crotch. The anthropometric instrument according to any one of [1] to [3], wherein the capacitor to be provided is attached.
[6] An integrated garment that covers at least the upper body to the lower abdomen of the human body, and the reversibly elastic capacitor is provided in the section from the neck to the back, or from the neck to the abdomen to the crotch. The body measurement instrument according to any one of [1] to [3], which is characterized by being attached.
"7" An integrated garment that covers at least the upper body of the human body, and the reversibly elastic capacitor is provided in at least any section between the shoulder joint and the elbow joint and between the elbow joint and the wrist joint. The anthropometric instrument according to any one of [1] to [3], which is characterized by being attached.
[8] An integrated garment that covers at least the lower half of the human body, and is a capacitor having reversible elasticity at least around the abdomen, around the buttocks, either left or right, or around both thighs and calves. The body measurement instrument according to any one of [1] to [3], characterized in that the device is attached.
[9] An integrated garment that covers at least the lower half of the human body, and is described above on either the left or right side or the side surface of both feet, between the hip joint and the knee joint, and between the knee joint and the ankle joint. The body measurement instrument according to any one of [1] to [3], wherein a reversibly elastic capacitor is attached.
[10] An integrated garment that covers at least the lower half of the human body, and reversibly extends from the arch of the foot to at least one of the left and right heels and / or the sole of the foot to the crotch through the medial side of both feet. The anthropometric instrument according to any one of [1] to [3], wherein an elastic capacitor is attached.
[11] The anthropometric instrument according to any one of [1] to "10", which is an integrated garment that covers the entire body of the human body.
[12] The size according to any one of [1] to [11], which is a size set so that the deformation of the capacitor having reversible elasticity is in the extension direction with respect to the size of the human body to be measured. Reversibly the person to be measured from the difference between the capacitance when not wearing and the capacitance when wearing the capacitance of a capacitor that is reversibly elastic while wearing an anthropometric instrument. A method for measuring body size, which comprises obtaining a body size corresponding to a place where an elastic capacitor is attached.
[13] A mechanism for transferring the body size measurement result of the subject obtained by the body size measurement method described in [12] to a system including a computer by wireless or wired communication, and clothes suitable for the subject from the obtained body size information. A clothing selection system characterized by having a calculation mechanism for selecting from existing products and a mechanism for feeding back the obtained selection results to the subject.
[14] A mechanism for transferring the body size measurement result of the subject obtained by the body size measurement method described in [12] to a system including a computer by wireless or wired communication, and clothes suitable for the subject from the obtained body size information. A custom-made clothing design system that features a calculation mechanism for designing and a mechanism for feeding back the obtained design results to the subject.

The anthropometric instrument of the present invention can reversibly change the capacitance of a stretchable capacitor (abbreviated as a stretchable capacitor) according to the stretchable deformation in the plane direction. Use to perform sensing.
In the present invention, the change in capacitance of the reversibly elastic capacitor, which changes according to the expansion and contraction deformation of the elastic capacitor in the surface direction, is mainly in the surface direction of the elastic dielectric layer. It is a change in capacitance due to a change in the thickness direction of the stretchable dielectric layer due to expansion and contraction. In order to exhibit such characteristics, it is preferable that the material used for the elastic dielectric layer has a high Poisson's ratio. 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.

Since the reversibly elastic capacitor used in the present invention has a high elongation rate in the plane direction, it is not only deformed in the thickness direction of the capacitor like the conventionally known capacitance type sensor. , Can be suitably used for measuring the amount of deformation strain in the plane direction. Further, the reversibly stretchable capacitor of the present invention adopts a dielectric layer having a good elongation recovery rate, so that the permanent strain after being greatly deformed is small, and the residual strain is small even if it is repeatedly deformed (stretched). Is unlikely to occur. As a result, the hysteresis between the amount of deformation and the output value (capacitance) is small, the responsiveness and responsiveness are excellent, and the reliability (long-term reliability) when repeatedly used is excellent.

The reversibly elastic capacitor used in the present invention uses a low-resistance elastic conductor for the electrode, so that the element has high durability, and even if the element becomes large, a sensor with uniform sensitivity can be used. Can be configured.
The reversibly elastic capacitor of the present invention can be reduced in thickness, and as a result, an extremely lightweight sensor can be constructed. Further, since the reversibly stretchable capacitor of the present invention can suppress the stress at the time of stretching to a low level, it is possible to have high sensitivity and reduce the influence on the measurement target.

FIG. 1 is a schematic view showing a basic configuration of a reversibly elastic capacitor used in the present invention. FIG. 2 is a block diagram of an elastic sheet with a hot melt layer used when producing a reversibly elastic capacitor used in the present invention. FIG. 3 is a schematic view showing an example in which a capacitor having reversible elasticity is constructed by laminating an elastic sheet on a base material. FIG. 4 is a schematic view showing the configuration of a reversibly elastic capacitor used in the present invention. FIG. 5 is a schematic process diagram when the reversibly elastic capacitor used in the present invention is manufactured by a printing method. FIG. 6 is a schematic view illustrating the stretch recovery rate of the present invention. FIG. 7 is a schematic process diagram in the case where the reversibly elastic capacitor used in the present invention is manufactured by the print transfer method. FIG. 8 is a schematic view illustrating the SS curve and the tensile yield elongation. FIG. 9 is a schematic view showing an example in which a one-piece covering from the upper body to the crotch is used as a garment in the body measuring instrument of the present invention, and capacitors having reversible elasticity are arranged around the chest, abdomen, and buttocks. is there. FIG. 10 is a schematic view showing an example in which a one-piece dress covering from the upper body to the crotch is used as a garment in the body measuring instrument of the present invention, and a reversibly elastic capacitor is arranged from the neck to the inseam through the back surface. Is. FIG. 11 is a schematic diagram showing an example in which a stirrup trouser covering the lower body is used as a garment in the body measuring instrument of the present invention, and capacitors having reversible elasticity are arranged around the buttocks, around the thighs, and around the shins. It is a figure. FIG. 12 shows the body measuring instrument of the present invention using a stirrup trouser that covers the lower body as a garment, and a reversibly elastic capacitor is applied from the waist to the arch, from the hip joint to the knee joint, and from the knee joint to the ankle joint. It is the schematic which shows the arrangement example.

1. 1. Elastic conductor layer (surface electrode)
2. Elastic dielectric layer 3. Elastic conductor layer (back electrode)
4. Elastic conductor 5. Elastic dielectric 6. Hot melt adhesive layer 7. Base material 11. Elastic base material 12. Elastic base layer 13. First elastic conductor layer 14. Elastic dielectric layer 15. Second elastic conductor layer 16. Elastic insulation cover layer 17. Back electrode 18. Through hole 19. Temporary base material 31. Capacitor with reversible elasticity 32. Terminal 33. wiring

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1. As shown in, the reversibly elastic capacitor used in the present invention has the basic configuration of 1. Elastic conductor layer (surface electrode), 2. Elastic dielectric layer, 3. It has three layers of elastic conductor layers (back electrodes). In the actual configuration, an adhesive layer for adhering each layer may be inserted into each basic constituent layer. Further, an insulating coating layer may be provided on the outside of the elastic conductor layer which is the outermost layer. As is obvious from the object of the present invention, sufficient elastic properties are also required for the adhesive layer and the coating layer.

The non-stretchable specific resistance of the stretchable conductor layer of the reversibly stretchable capacitor used in the present invention is indispensable to be 3 × 10-3 Ωcm or less, and must be 1 × 10-3 Ωcm or less. It is preferably 3 × 10-4 Ωcm or less, and more preferably 1 × 10-4 Ωcm or less. When the specific resistance exceeds this range, the resistance distribution in the conductive layer becomes remarkable, the time constant of the device becomes large, a problem occurs in responsiveness, and the high frequency characteristic and the pulse responsiveness may deteriorate. The lower limit of resistivity depends on the conductive material used in principle.

The stretchable conductor layer of the reversibly stretchable capacitor used in the present invention preferably has a specific resistance at 100% stretch of 100 times or less of that of non-stretchable capacitor, and more preferably 50 times or less. Further, it is preferably 30 times or less, and further preferably 15 times or less. When the specific resistance at 100% elongation exceeds this range, the resistance distribution in the conductive layer becomes remarkable, the time constant of the device becomes large, a problem occurs in responsiveness, and the high frequency characteristics and pulse responsiveness deteriorate. There is. The lower limit of resistivity depends on the conductive material used in principle. When the elastic conductor is deformed, the geometrical change due to the deformation, that is, the change in the resistance value due to the change in the length and the cross-sectional area in the current direction is excluded. Within the range of the initial resistivity of the present invention and the resistivity at the time of extension, the resistance distribution in the conductive layer can be effectively kept small even if the resistance value is changed due to geometric deformation. it can.

The stretchable conductor layer of the reversibly stretchable capacitor used in the present invention is composed of at least 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 7 to 35% by mass with respect to the total of the conductive particles and the flexible resin.
The stretchable conductor layer of the reversibly stretchable capacitor used in the present invention can be obtained by kneading and mixing metal particles and a flexible resin and molding it into a film shape or a sheet shape. The stretchable conductor layer of the present invention is preferably processed into a sheet or film by coating and drying after being made into a paste or slurry for forming a stretchable conductor by adding a solvent or the like to metal particles and a flexible resin. Can be done. It is also possible to give a predetermined shape by printing after making a paste.

The conductive particles of the present invention are particles having a particle size of 100 μm or less and made of a substance having a specific resistance of 1 × 10-1 Ωcm or less. Examples of the substance having a specific resistance of 1 × 10-1 Ωcm or less include metals, alloys, carbons, doped semiconductors, and conductive polymers. The conductive particles 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-coated copper. Hybrid grains, as well as metal-plated polymer particles, metal-plated glass particles, metal-coated ceramic particles, and the like can be used.

In the present invention, it is preferable to mainly use flake-shaped silver particles or amorphous aggregated silver powder. It should be noted that the term "used mainly" here means that 90% by mass or more of the conductive particles are used. Amorphous agglomerated powder is a three-dimensional agglomerate of spherical or amorphous primary particles. Amorphous agglomerate powder and flaky powder have a larger specific surface area than spherical powder and the like, and are preferable because they can form a conductive sol work even with a low filling amount. Since the amorphous agglomerated powder is not in the form of monodisperse, it is more preferable because the particles are in physical contact with each other and easily form a conductive sol work.

The particle size of the flake-like powder is not particularly limited, but it is preferable that the average particle size (50% D) measured by the dynamic light scattering method is 0.5 to 20 μm. More preferably, it is 3 to 12 μm. If the average particle size exceeds 15 μm, it becomes difficult to form fine wiring, and clogging occurs in the case of screen printing or the like. If the average particle size is less than 0.5 μm, the particles cannot be contacted with each other at low filling, and the conductivity may deteriorate.

The particle size of the amorphous agglomerated powder is not particularly limited, but the average particle size (50% D) measured by the light scattering method is preferably 1 to 20 μm. More preferably, it is 3 to 12 μm. If the average particle size exceeds 20 μm, the dispersibility is lowered and it becomes difficult to make a paste. If the average particle size is less than 1 μm, the effect as a coagulated powder is lost, and good conductivity may not be maintained with low filling.

The non-conductive particles in the present invention are particles made of an organic or inorganic insulating substance. The inorganic particles of the present invention are added for the purpose of improving printing characteristics, stretch characteristics, and coating film surface properties, and are made of inorganic particles such as silica, titanium oxide, talc, alumina, and barium sulfate, and a microgel made of a resin material. Etc. can be used.

Examples of the flexible resin in the present invention include thermoplastic resins, thermosetting resins, and rubbers having an elastic modulus of 1 to 1000 MPa. Urethane resin or rubber is preferable in order to develop the elasticity of the film. Examples of 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. Among these, 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 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 bonded 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.

Examples of the urethane resin in the present invention include urethane rubbers containing a polyether polyol or a polyester polyol as a polyol component and an HDI-based polyisocyanate as an isocyanate component. The urethane rubber of the present invention has a high elongation rate and has a small tensile permanent strain and a small residual strain, so that it is a stretchable dielectric layer having excellent reliability when repeatedly deformed.

As the polyether polyol in the present invention, for example, a monomer material such as polyethylene glycol, polypropylene glycol, polypropylene triol, polypropylene tetraol, polytetramethylene glycol, polytetramethylenetriol, and cyclic ether for synthesizing these is copolymerized. Examples thereof include polyalkylene glycols such as copolymers obtained above, derivatives in which a side chain is introduced or a branched structure is introduced therein, modified products, and mixtures thereof. Of these, polytetramethylene glycol is preferred. The reason is that it has excellent mechanical properties.

As the above-mentioned polyether polyol, a commercially available product can also be used. Specific examples of commercially available products include PTG-2000SN (manufactured by Hodogaya Chemical Co., Ltd.), polypropylene glycol, Preminol S3003 (manufactured by Asahi Glass Co., Ltd.), Pandex GCB-41 (manufactured by DIC Corporation), and the like.

As the polyester polyol in the present invention, an aromatic total polyester polyol, an aromatic / aliphatic copolymerized polyester polyol, an aliphatic polyester polyol, and an alicyclic polyester polyol can be used. As the polyester polyol in the present invention, either a saturated type or an unsaturated type may be used.

The HDI-based polyisocyanate in the present invention is hexamethylene diisocyanate (HDI) or a modified product thereof, and is a compound having a plurality of isocyanate groups in the molecule.
The urethane rubber in the present invention is obtained by reacting a mixture containing a chain extender, a cross-linking agent, a catalyst, a vulcanization accelerator and the like, if necessary, in addition to the above-mentioned polyol component and the above-mentioned isocyanate component. But it's okay. In the present invention, it is preferable to use a sulfur-free cross-linking agent. Further, the flexible polymer material of the present invention may contain additives such as plasticizers, antioxidants, antioxidants, colorants, dielectric fillers and the like.

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 to be added, and the flexible resin. Is 12 to 20% by mass.

Further, an epoxy resin can be blended in the stretchable conductor forming paste used for producing the reversibly stretchable capacitor used in the present invention. The preferred epoxy resin in the present invention is a bisphenol A type epoxy resin or a phenol novolac type epoxy resin. When an epoxy resin is blended, a curing agent for the epoxy resin can be blended. As the curing agent, a known amine compound, polyamine compound, or the like may be used. The curing agent is preferably blended in an amount of 5 to 50% by mass, more preferably 10 to 30% by mass, based on the epoxy resin. The blending amount of the epoxy resin and the curing agent is 3 to 40% by mass, preferably 5 to 30% by mass, and more preferably 8 to 24% by mass with respect to the total resin components including the flexible resin.

The stretchable conductor forming paste used in the production of the reversibly stretchable capacitor used in the present invention contains a solvent. The solvent in the present invention is water or an organic solvent. The content of the solvent should be appropriately investigated depending on the viscosity required for the paste, and is not particularly limited, but is generally preferably a mass ratio of 30 to 80 when the total mass of the conductive particles and the flexible resin is 100. The organic solvent used in the present invention preferably has a boiling point of 100 ° C. or higher and lower than 300 ° C., more preferably 130 ° C. or higher and lower than 280 ° C. If the boiling point of the organic solvent is too low, there is a concern that the solvent volatilizes during the paste manufacturing process or when the paste is used, and the component ratios constituting the conductive paste are likely to change. On the other hand, if the boiling point of the organic solvent is too high, the amount of residual solvent in the dry-cured coating film increases, which may cause a decrease in the reliability of the coating film.

Examples of the organic solvent in the present invention include cyclohexanone, toluene, xylene, isophorone, γ-butyrolactone, benzyl alcohol, Solbesso 100, 150, 200 manufactured by Exxon Chemical, propylene glycol monomethyl ether acetate, tarpionel, butyl glycol acetate, and diamylbenzene. , Triamylbenzene, n-dodecanol, diethylene glycol, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol dibutyl ether, diethylene glycol monoacetate, triethylene glycol diacetate, triethylene glycol, triethylene glycol Monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, tetraethylene glycol, tetraethylene glycol monobutyl ether, tripropylene glycol, tripropylene glycol monomethyl ether, 2,2,4-trimethyl-1,3-pentanediol Examples include monoisobutyrate. As petroleum-based hydrocarbons, AF solvent No. 4 (boiling point: 240 to 265 ° C), No. 5 (boiling point: 275 to 306 ° C), and No. 6 (boiling point: 296 to 317 ° C) manufactured by Nippon Oil Co., Ltd. , No. 7 (boiling point: 259 to 282 ° C.), No. 0 solvent H (boiling point: 245 to 265 ° C.), and the like, and two or more of them may be contained if necessary. Such an organic solvent is appropriately contained so that the stretchable conductor forming paste has a viscosity suitable for printing and the like.

The elastic conductor forming paste used for producing the reversibly elastic capacitor used in the present invention is made of conductive particles, barium sulfate particles, elastic resin, a solvent, a dissolver, and a three-roll mill. It can be obtained by mixing and dispersing with a disperser such as a self-revolving mixer, an attritor, a ball mill, or a sand mill.

The stretchable conductor forming paste used for producing the reversibly stretchable capacitor used in the present invention is provided with printability, color tone adjustment, leveling, and antioxidant as long as the contents of the invention are not impaired. Known organic and inorganic additives such as agents and ultraviolet absorbers can be blended.

The stretchable dielectric layer of the reversibly stretchable capacitor used in the present invention is made of a stretchable resin material, that is, a polymer material.
The stretchable dielectric layer used in the present invention is preferably composed of a stretchable insulating polymer having a tensile yield elongation of 70% or more. The tensile yield elongation is preferably 85% or more, more preferably 120% or more, still more preferably 150% or more.

The tensile yield elongation in the present invention is a curve (SS) obtained by a general tensile test when the vertical axis is weighted (or strength) and the horizontal axis is strain (or elongation or elongation). In the curve), it is the elongation at the first point where an increase in elongation is observed without an increase in weight, that is, the yield point. Generally, the yield point is regarded as a point that roughly indicates the boundary where the elastic deformation changes to the plastic deformation.
FIG. 9 is a schematic view showing a typical SS curve obtained in a tensile test, and is shown in the figure.
SR: Tensile breaking strength
SB: Tensile strength
SS: Tensile yield strength
ER: Tensile breaking elongation
EB: Tensile elongation
ES: Tension yield elongation.
The tensile yield elongation of the stretchable insulating polymer layer in the present invention is preferably 80% or more, more preferably 95% or more, and even more preferably 120% or more.
The upper limit of the tensile yield elongation is 450%, preferably 360%. If the tensile yield strength is higher than necessary, the mechanical strength of the dielectric layer may be impaired.

Examples of the flexible polymer material used for the stretchable insulating polymer layer include elastomers, thermoplastic resins, thermosetting resins, and rubbers having an elastic modulus of 1 to 1000 MPa. Urethane resin or rubber is preferable in order to develop the elasticity of the film. Examples of 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. Among these, 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 preferable in the present invention is 1.2 to 420 MPa, more preferably 1.4 to 210 MPa, still more preferably 1.5 to 150 MPa.

As the urethane resin preferably used as the flexible polymer material, a resin similar to the urethane resin that can be used for the above-mentioned elastic conductor layer can be used, and urethane rubber can be preferably used.

The average thickness of the dielectric layer of the present invention is 0.3 to 1000 μm from the viewpoint of increasing the capacitance C to improve the detection sensitivity and improving the followability to the object to be measured. From the viewpoint of sensitivity, the range is preferably 0.3 to 20 μm, more preferably 0.3 to 8 μm, and further preferably 0.5 to 6 μm.

The elastic dielectric layer of the reversibly elastic capacitor used in the present invention has a relative permittivity of 2.2 or more at no load, preferably 2.8 or more, and more preferably 3.4 or more. 3.8 or more is still preferable. The upper limit of the relative permittivity is about 500, preferably 150 or less, and more preferably 80 or less. For the purpose of the present invention, it is preferable that the elastic dielectric layer has a high relative permittivity, but in general, a polymer material having elasticity often has an alkyl group in the flexible chain component, and has a relatively low ratio. It has a dielectric constant. In the present invention, it is preferable to increase the specific dielectric constant by introducing a polar group into the molecular chain. A nitrile group, a ketone group, an ester group, a halogen substituent, a hydroxyl group, a carboxyl group, a nitro group, a halogen group and the like are polymers. It is a functional group effective for increasing the specific dielectric constant of.

It is possible to increase the relative permittivity of the dielectric layer by adding a filler having a high relative permittivity, preferably an inorganic filler such as titanate. However, in the present invention, the content of the inorganic filler having a relative permittivity of 5 or more in the stretchable dielectric layer is preferably 10% by mass or less. The content of the inorganic filler is preferably 3% or less, more preferably 1% or less, still more preferably 0.3% or less. When the content of the inorganic filler is high, when the stretchable dielectric layer is stretched or compressed, the degree of stress concentration on the stretchable polymer portion increases, and peeling occurs at the filler-resin interface to form voids. There may be a problem with durability.
Further, if the amount of the inorganic filler contained in the stretchable dielectric layer is large, the Poisson's ratio of the stretchable dielectric layer becomes low, the change in capacitance during stretching becomes small, and the sensitivity when applied as a sensor is lowered.

In the present invention, the stretchable conductor layer and the stretchable dielectric layer described above are laminated to obtain a capacitor having reversible stretchability.
The reversibly stretchable capacitor of the present invention causes a change in capacitance in any of compression and expansion in the thickness direction and compression and expansion in the surface direction, and therefore, in all directions. Although it can be used as a deformable sensor of the above, in the present invention, it is particularly preferable to utilize a change in capacitance due to extensional deformation in the plane direction.

In the present invention, a hot melt adhesive may be used when laminating the stretchable conductor layer and the stretchable dielectric layer. As the hot melt adhesive in the present invention, a polymer material having a softening temperature of about 30 ° C. to 150 ° C. can be used, and preferably, it has flexibility having the same degree of elasticity as the dielectric layer. A provided polymer material can be used. Such hot melt adhesives include ethylene-based copolymers, styrene-based block copolymers, olefin-based (co) copolymers, and the like, and further contain crystalline polar groups to impart adhesiveness using them as base polymers. Polymer materials containing compounds, amorphous poly α-olefins, tackifier resins, polypropylene waxes and other formulations, styrene-ethylenepropylene-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 blends thereof, and the like 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.

In the present invention, as a means for realizing such a reversibly elastic capacitor, a method of laminating two sheets can be exemplified. That is, first, as shown in FIG. 2, a laminated sheet in which an elastic conductor layer, an elastic dielectric layer, and an adhesive layer are laminated is adjusted. The stretchable conductor layer and the stretchable dielectric layer can be laminated by melt extrusion molding, or can be laminated by coating a paste material. A sheet of the stretchable conductor layer and a sheet of the stretchable dielectric layer can be prepared separately and bonded together with an adhesive layer. In this case, in the case of Mochida using an insulating adhesive as the adhesive layer, the adhesive layer becomes a part of the dielectric layer. When a conductive adhesive layer is used, the adhesive layer becomes a part of the conductive layer. The adhesive layer preferably has the same degree of elasticity and flexibility as the elastic conductor layer and the elastic dielectric layer.
It is preferable to use an insulating hot-melt type polymer material as the adhesive layer. In the present invention, elastic conductivity is first formed on the release sheet, then an elastic dielectric layer is formed, and then a hot melt adhesive sheet is further laminated, sandwiched between the release sheets, and heated and pressed. Such a laminated sheet can be obtained.

Subsequently, as shown in FIG. 3, a portion in which the laminated sheet of FIG. 2 is laminated on a stretchable fabric having high elongation using a hot melt layer, and the same laminated sheet is used as an electrode on the laminated sheet. However, by shifting it so that it is exposed, or by hollowing it out in a predetermined pattern and laminating it on top of each other, the hot melt adhesive layer sandwiched between the conductor layers and the elastic dielectric layer act as dielectrics reversibly. A stretchable capacitor can be obtained. A stretchable insulating cover layer can be further provided on the outermost conductor layer. As the insulating cover layer, an insulating resin or the like similar to the polymer material used for the dielectric layer can be used. Such an insulating resin sheet can also be laminated via a hot melt adhesive layer.

Figure 4. Is a schematic diagram illustrating another aspect of the reversibly elastic capacitor of the present invention. The electrodes of the reversibly elastic capacitor are connected to the terminals on the back surface of the base material via through holes. As the through hole, a plated through hole used in a general printed wiring board, or a through hole connected by a conductive paste or the like can be used. Further, a classical method of electrically connecting the front and back sides with metal rivets or the like and fixing them by caulking or the like can be applied. When the reversibly elastic capacitor of the present invention is applied to clothing, a metal snap hook or the like may be used instead of the through hole as in the case of the metal rivet.

As another embodiment of the reversibly elastic capacitor used in the present invention, a reversibly elastic capacitor using a printing method can be exemplified. That is, by sequentially printing and laminating each layer in the order of A to F shown in FIG. 5, a capacitor having reversible elasticity can be obtained. In FIG. 5, the step of printing directly on the base material is illustrated, but a method of printing on a release film or the like in the reverse order and finally transferring to the cloth can also be used.

The extension recovery rate in the present invention is the initial length when a capacitor having reversible elasticity is suspended as shown in FIG. 6, a load is applied to extend the capacitor, and a load is removed to cause the capacitor to contract. L0, the length when extended by 20% to a predetermined% is L1, and the length when the extension load is removed is L2.
[Number 1] Stretch recovery rate = ((L1-L2) / (L1-L0)) x 100 [%]
[Equation 2] Residual distortion rate = ((L2-L0) / L0) x 100 [%]
L0 Initial length L3 Elongation = L1-L0
L4 recovery length = L1-L2
L5 Residual strain = L2-L0
Is defined. A similar measurement method is specified in the JIS L 1096 fabric test method for woven fabrics and knitted fabrics, but the recovery rate after stretching to a certain length is not the recovery rate after stretching under a constant load. different. In actual use, the load applied to the stretchable conductor layer is often repeatedly stretched to a predetermined length regardless of the load, so that the stretch recovery rate by the constant load method cannot express practical performance. The stretch recovery rate of the reversibly stretchable capacitor of the present invention is an evaluation of a portion that functions as a capacitor element, and the electrode portion is omitted. Unless otherwise noted, the stretch recovery rate is evaluated in an environment of 25 ° C ± 3 ° C.

In the present invention, the change in capacitance of the reversibly elastic capacitor, which changes according to the expansion and contraction deformation of the elastic capacitor in the surface direction, is mainly in the surface direction of the elastic dielectric layer. It is a change in capacitance due to a change in the thickness direction of the stretchable dielectric layer due to expansion and contraction. In order to express such characteristics, it is preferable that the material used for the elastic dielectric layer has a high Poisson's ratio. 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.

In the present invention, the surface direction of the stretchable dielectric layer of the reversibly stretchable capacitor described above follows the deformation of the garment made of the stretchable material when the subject wears the garment. The amount of deformation is obtained from the capacitance of the capacitor before and after deformation due to wearing, and the body size is obtained from it.
As a method of attaching the elastic dielectric layer of the elastic capacitor so as to follow the deformation of the clothes made of the elastic material, it may be sewn or adhered. It is self-evident that elastic adhesives or adhesives should be used when using adhesives. In the present invention, it is preferable to attach it to an elastic material by using a flexible hot melt material or the like.

The elastic base material is a cloth, and the cloth can be a woven fabric, a knitted fabric, or a non-woven fabric, and a resin-coated cloth or a coated cloth impregnated with a resin can also be used as the base material. Further, a synthetic rubber sheet or the like represented by neoprene (registered trademark) can also be used as a base material. The fabric used in the present invention preferably has stretchability capable of repeatedly expanding and contracting by 10% or more. Further, the substrate of the present invention preferably has a breaking elongation of 50% or more. The base material of the present invention may be a cloth base cloth, a ribbon, a tape shape, a braid, a net braid, or a single-wafer cloth cut from the cloth base cloth.
When the cloth is a woven fabric (knit), for example, plain weave, twill weave, satin weave, and the like can be exemplified. When the fabric is knitted, for example, flat knitting and its deformation, Kanoko knitting, Amunzen knitting, lace knitting, eyelet knitting, thread netting, pile knitting, rib netting, ripple knitting, turtle shell knitting, blister knitting, Milan rib knitting, Double picket edition, single picket knitting, diagonal edition, helibone edition, punch roma edition, basket edition, tricot edition, half tricot edition, satin tricot edition, double tricot edition, quinz cord edition, stripe soccer edition, Russell edition Examples of tulle mesh knitting and modifications / combinations thereof can be given. The cloth may be a non-woven fabric made of an elastomer fiber or the like.
The fiber materials for calibrating these woven fabrics and knitting include natural fibers such as cotton, wool and hemp, nylon, polyester, polyurethane, polyvinyl acetate, polybenzazole, polyimide, polyaromatic amide, polybenzoxazole, and high molecular weight. Chemically synthesized fibers such as polyethylene and blended products thereof can be used.

Clothing made of elastic material that can be used in the present invention includes clothing that independently covers the upper body such as shirts, blouses, and trainers, and clothing that independently covers the lower body such as trousers, pants, tights, leggings, and trenka. , Hats, gloves, arm covers, socks, socks, bras, panty shorts that cover each part of the body individually, one-piece swimwear, leotards that cover the upper body to the crotch, full-body tights As described above, it is possible to use clothes that integrally cover the upper body and the lower body.

As a more specific example of the present invention, the forms shown in FIGS. 9, 10, 11 and 12 can be exemplified. FIG. 9 shows an example in which a one-piece swimsuit covering from the upper body to the crotch is used as a garment in the body measuring instrument of the present invention, and reversibly elastic capacitors are arranged around the chest, abdomen, and buttocks. FIG. 10 shows an example in which a one-piece dress covering the upper body to the crotch is used as a garment in the body measuring instrument of the present invention, and a reversibly elastic capacitor is arranged from the neck to the inseam through the back surface. FIG. 11 shows an example in which a stirrup trouser covering the lower half of the body is used as a garment in the body measuring instrument of the present invention, and capacitors having reversible elasticity are arranged around the buttocks, around the thighs, and around the shins. FIG. 12 shows the body measuring instrument of the present invention using a stirrup trouser that covers the lower body as a garment, and a reversibly elastic capacitor is applied from the waist to the arch, from the hip joint to the knee joint, and from the knee joint to the ankle joint. This is an example of placement.
In addition, here, stirrup trousers are a kind of leggings, which are clothes that cover the legs from the lower body, and are also called stirrup trousers. It is characterized by having a part that hooks on the part.

In the present invention, the reversibly elastic capacitor is preferably set to have a length of 3 to 100% with respect to the length direction of each part of the body to be measured. In particular, by setting the length over 50% or more, preferably 70% or more, it is possible to provide the sensing unit over substantially the entire range of the measured portion of the body when measuring the body size. It becomes.

The stress when the body measurement instrument of the present invention is stretched by 20% is preferably 20 N or less. Further, in the present invention, the stress when the body measuring instrument is stretched by 20% is preferably 12 N or less, more preferably 8 N or less, still more preferably 5 N or less, still more preferably 3 N or less. If the stress is higher than this, the feeling of discomfort becomes greater when worn on the body.
This stress is the sum of the stress generated by the stretchable material that calibrates the garment and the capacitor that is reversibly stretchable. In the present invention, the lower limit of the stress when the body measuring instrument is stretched is 0.5 N, preferably 0.8 N. If the stress is smaller than this, the fitting of the body measuring instrument to the body becomes loose, and depending on the posture, problems such as unstable measurement and misalignment of the capacitor are likely to occur.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.

<Amount of nitrile>
The obtained resin material was converted into mass% by mass ratio of monomers from the composition ratio obtained by NMR analysis.

<Moony Viscosity>
The measurement was performed using an SMV-300RT "Moony Viscometer" manufactured by Shimadzu Corporation.

<Elastic modulus>
The sample to be measured was formed into a sheet having an arbitrary thickness in the range of 20 μm to 200 μm, and then punched into a dumbbell mold specified by ISO 527-2-1A to obtain a test piece.
A tensile test was carried out by a method specified in ISO 527-1 to obtain a stress-strain diagram of the resin material, and the elastic modulus was calculated by a conventional method.

<Tensile yield elongation>
The sample to be measured was formed into a sheet having an arbitrary thickness in the range of 20 μm to 200 μm, and then punched into a dumbbell mold specified by ISO 527-2-1A to obtain a test piece. Then, the SS curve was obtained using a tensile tester, the yield point was obtained as shown in FIG. 9, and the elongation at that time was taken as the tensile yield elongation.
<Poisson's ratio>
The Poisson's ratio of the stretchable dielectric was determined by a method conforming to ISO527-1: 2012.

<Glass transition temperature>
The glass transition temperature was determined by differential scanning calorimetry (DSC) according to a conventional method.

<Molecular weight>
A sample of the binder resin material was added to THF (tetrahydrofuran) so that the concentration of the resin in the solution was 0.4% by mass, stirred at room temperature for 1 hour, and then left to stand for 24 hours. Next, the obtained resin solution was diluted 4-fold with THF, passed through a 0.45 μm filter, and the filtrate was subjected to number average molecular weight, weight average molecular weight, and dispersion ratio (Mw / Mn) using GPC. I asked.

<Stretch recovery rate>
The sample to be measured was formed into a sheet having an arbitrary thickness in the range of 20 μm to 200 μm, and then punched into a dumbbell mold specified by ISO 527-2-1A to obtain a test piece.
Then, marks were made at 33 mm (effective length 66 mm) from the center of the dumbbell-shaped test piece having a width of 10 mm and a length of 80 mm, and the initial distance L0 between the marks was accurately measured. Next, the outside of the marked part is clamped, and the distance between the marks, which is 66 mm, is extended to an extension length of 79.2 mm (+ 13.2 mm, equivalent to an extension degree of 20%), and then separated from the clamp to a predetermined temperature (especially). It was placed on a fluororesin sheet held horizontally at 25 ° C. (unless otherwise noted), the distance L2 after stretching between the marks was measured, and the stretching recovery rate was determined according to the following formula.
Initial length L0 = 66.0 mm
Extension length L1 = 79.2 mm
Length after stretching L2 = measured stretch L3 = L1-L0 = 13.2 mm
Recovery length L4 = L1-L2
Stretch recovery rate = ((L1-L2) / (L1-L0)) x 100 [%]

<Stretch recovery rate of fabric>
The fabric material was punched into a dumbbell shape specified by ISO 527-2-1A to prepare a test piece. The stretching direction of the fabric was defined as the length direction of the dumbbell.
Next, as in the measurement of the stretch recovery rate of the resin, marks 33 mm (effective length 66 mm) from the center of each of the 10 mm wide and 80 mm long parts in the dumbbell type test piece, and the stretch length is 99 mm (+33 mm). The stretch recovery rate was obtained by operating in the same manner as the stretch recovery rate of the resin except that the stretch was stretched to 50%.

<Heat resistance of fabric>
The heat resistance of the fabric was determined by the heat shrinkage temperature required by JIS L1013: 2010 Chemical Fiber Filament Thread Test Method 8.19.2.

<Average particle size>
The average particle size of the filler was measured using a light scattering type particle size distribution measuring device LB-500 manufactured by HORIBA, Ltd.

<Specific resistivity>
If the conductor sheet is large enough, punch it into a dumbbell shape specified by ISO 527-2-1A, and use the 10 mm wide and 80 mm long part in the center of the dumbbell type test piece as the test piece. Using. When the conductor sheet can be molded, it is heat-compressed into a sheet having a thickness of 200 ± 20 μm, and then punched into a dumbbell mold specified by ISO 527-2-1A to prepare a test piece in the same manner. If the size of the conductor sheet is too small to obtain the specified dumbbell shape, cut out a rectangle with a width and length that can be collected, use it as a test piece, and use the measured width, thickness, and length. Converted.
Specimen: Measure the resistance value [Ω] of the part with a width of 10 mm and a length of 80 mm using a milliohm meter manufactured by Agilent Technologies, and multiply it by the aspect ratio (1/8) of the test piece to obtain the sheet resistance value "Ω". □ ”was asked.
Further, the resistivity value [Ω] was multiplied by the cross-sectional area (width 1 [cm] mm × thickness [cm]) and divided by the length (8 cm) to obtain the specific resistance [Ωcm].

<Washing durability>
A 30-cycle washing test was conducted according to the 105 method specified in the labeling symbols and labeling methods for handling JIS L 0217 textile products.
Washing liquid: Neutral detergent 0.5% solution Water flow: Weak bath ratio: 1:60
Laundry net Yes Laundry cycle Washing 30 ° C for 5 minutes Rinse 30 ° C for 2 minutes twice This cycle is one cycle and repeated 30 times.
The operation was confirmed again with the sensor after the test.

[Example 1]
12 parts by mass of nitrile butadiene rubber having a nitrile amount of 40% by mass and a Mooney viscosity of 46,
Isophorone 30 parts by mass,
Fine flake-shaped silver powder with an average particle size of 6 μm [Product name Ag-XF301 manufactured by Fukuda Metal Leaf Powder Industry Co., Ltd.] 58.0 parts by mass,
Was uniformly mixed and dispersed by a three-roll mill to obtain a paste AG1 for forming an elastic conductive layer.
The obtained stretchable conductive layer forming paste AG1 was applied and dried in the form of a release PET film by a screen printing method to obtain a stretchable conductor sheet having a thickness of 22 μm.

The obtained elastic conductor sheet was cut into a width of 10 mm and a length of 200 mm, and the specific resistance was determined from the resistance value and the thickness in the length direction. As a result, the specific resistance was 1.0 × 10-4 Ωcm.
Next, clip both ends of the stretchable conductor sheet in the length direction between the clips of the pull tester, pull it to 320 mm with an effective length of 160 mm, and adjust the resistance values at both ends, the width and thickness of the narrowest part of the test piece. The specific resistance at 100% elongation was calculated using this. As a result, the specific resistance at 100% elongation was 48 × 10-4 Ωcm. The evaluation results, including other characteristics, are shown in Table 1. Shown in

30 parts by mass of NBR (nitrile butadiene rubber) having a nitrile amount of 40% by mass and a Mooney viscosity of 46 was dissolved in 40 parts by mass of isophorone to obtain a stretchable dielectric layer forming paste CC1. The obtained stretchable dielectric layer forming paste was applied and dried in the form of a release PET film by a screen printing method to obtain a stretchable conductor sheet having a thickness of 35 μm. The evaluation results of the obtained stretchable dielectric layer are shown in Table 1. Shown in

On the release PET film, the previously obtained elastic conductor forming paste, elastic dielectric forming paste, and then elastic conductor forming paste were repeatedly printed and dried and cured using the screen printing method. A reversibly elastic capacitor having a laminated structure having a width of 10 mm and a length of 200 mm was obtained. The obtained reversibly stretchable capacitor was peeled off from the release PET film, and the stretch recovery rate and 20% stretch stress were evaluated. The results are shown in Table 1.
Furthermore, a silver-coated thread is connected to both poles of the capacitor that has reversible elasticity with a conductive adhesive, and the wiring is pulled out and connected to the LCR high tester manufactured by Hioki Electric Co., Ltd. The relationship between the degree of elongation and the capacitance at 1 MHz was measured. As a result, both showed a good response. The relationship between the degree of elongation and the capacitance was measured at a repeating cycle of 1 cycle / sec between 0% and 50% of the degree of elongation. As a result, hysteresis was not observed, showing a good response.

The obtained reversibly elastic capacitor is shaped into a predetermined width and length, and as shown in FIG. 9, the leotard (M size) using the elastic material surrounds the chest, abdomen, and buttocks. Each was attached using a hot melt adhesive sheet. Regarding the chest, connector terminals provided at both ends of the capacitor are arranged so as to be located on the left and right sides of the center of the chest. As for the abdomen, the end of the capacitor was similarly arranged so as to come to the entire abdomen, and the connector terminal installed in the center of the chest was wired with conductive fibers. Similarly, the buttocks were wired to the connector terminal provided in the center of the chest to obtain an anthropometric instrument M1. In this embodiment, the connector terminal and the LCR high tester manufactured by Hioki E.E. Co., Ltd. are connected on a trial basis, and the capacitance when not worn and the body measuring instrument M1 are always worn by a subject who wears L-sized clothes. The capacitance of each part was measured when it was adhered to. The subjects' chest and abdomen obtained from the dimensions of the reversibly elastic capacitor when not worn, the difference in capacitance between when not worn and when worn, and the relationship graph between the degree of elongation and the capacitance obtained in advance. , The size of the buttocks was in agreement with the value measured with a tape measure in the range of ± 3%.
The obtained body measurement instrument was placed in a 300 mm × 300 mm washing net, and after the washing durability test, the possibility of respiratory sensing was confirmed again, and as a result, it was confirmed that the device operated without any problem.

[Example 2]
An operation was carried out in the same manner as in Example 1 except that a urethane resin was used as the stretchable dielectric layer to produce a reversibly stretchable capacitor having a width of 10 mm and a length of 600 mm. The evaluation results are shown in Table 1.
The obtained reversibly elastic capacitor was adhered to the leotard in the same manner as in Example 1 to obtain an anthropometric instrument shown in FIG. As a result of similarly evaluating the obtained body measurement instruments, the dimensions of the subject's chest, abdomen, and buttocks were in agreement with the values measured with a tape measure within a range of ± 2%.
The obtained body measurement instrument was placed in a 300 mm × 300 mm washing net, and after the washing durability test, the possibility of respiratory sensing was confirmed again, and as a result, it was confirmed that the device operated without any problem.

[Example 3]
Natural rubber was used as the stretchable dielectric layer, and a urethane sheet with a hot melt layer was used as the base material instead of the release PET film, and a capacitor having reversibly stretchable properties was formed on the base material by a printing method. In this embodiment, the stretchable conductor layer is extended so that it can be used as wiring. Using the obtained reversibly elastic capacitor, it was adhered to a leotard in the same manner as in Example 1 to obtain an anthropometric instrument shown in FIG. As a result of similarly evaluating the obtained body measurement instruments, the dimensions of the subject's chest, abdomen, and buttocks were in agreement with the values measured with a tape measure within a range of ± 2%.
The obtained body measurement instrument was placed in a 300 mm × 300 mm washing net, and after the washing durability test, the possibility of respiratory sensing was confirmed again, and as a result, it was confirmed that the device operated without any problem.

[Example 4]
Using SBR (styrene-butadiene rubber) as the binder resin, a paste for forming an elastic conductor was obtained by operating in the same manner as in Examples. Next, the obtained paste was coated on a release PET film, dried and then peeled off to obtain a stretchable conductive sheet having a thickness of 56 μm. The same stretchable dielectric layer forming paste as in Example 1 was coated on a release PET film, dried and then peeled off to obtain a stretchable dielectric sheet having a thickness of 78 μm. The evaluation results of each sheet are shown in Table 1. Shown in.
A stretchable dielectric sheet is layered on the obtained stretchable conductor sheet, and a stretchable conductor sheet is further layered to form a three-layer structure, sandwiched between release PET films, and three layers are laminated by hot pressing to reversibly expand and contract. A capacitor having a property was obtained.
Using the obtained reversibly elastic capacitor, it was adhered to a leotard in the same manner as in Example 1 to obtain an anthropometric instrument shown in FIG. As a result of similarly evaluating the obtained body measurement instruments, the dimensions of the subject's chest, abdomen, and buttocks were in agreement with the values measured with a tape measure within a range of ± 2%.
The obtained body measurement instrument was placed in a 300 mm × 300 mm washing net, and after the washing durability test, the possibility of respiratory sensing was confirmed again, and as a result, it was confirmed that the device operated without any problem.
[Examples 5 to 7]
Using the reversibly elastic capacitor obtained in Example 1, the body measurement instruments having the configurations shown in FIGS. 10, 11 and 12 were prototyped and evaluated in the same manner.
As a result, the body length of the subject could be measured at ± 3% by the body measuring instrument having the configuration shown in FIG. Using the body measuring instrument having the configuration shown in FIG. 11, the circumference of the buttocks could be measured at ± 3%, and the circumferences of the thighs and shins could be measured at ± 1%. Further, using the body measuring instrument having the configuration shown in FIG. 12, it was possible to measure the foot length at ± 3% and the thigh length and the shin length at ± 2%. In addition, all the instruments could be used without any particular problem even after 30 times of washing.
[Comparison example]
A capacitor having reversible elasticity was obtained by the same operation except that a crosslinked natural rubber sheet was used as the elastic dielectric layer in Example 4.
Next, the obtained reversibly elastic capacitor was attached to an M-sized leotard in the same manner as in Example 1, and an attempt was made to measure the body size by wearing it on an L-sized subject, but the subject was considerably He complained of crampedness, and the measured value was -5 to 7% smaller than the actual size. It was interpreted that this was because the binding force was too strong and the body dimensions were measured with the body tightened considerably.

As described above, the body measuring instrument using the reversibly elastic capacitor of the present invention can measure the size of a key part of the body just by wearing it with a natural wearing feeling. Since the measured values are obtained electrically, it is easy to automate the measurement. It is an easy technical category today to reduce the size of the capacitance measurement element, attach it as a part of anthropometry equipment, and transmit it remotely by wireless communication or the like. The physical data thus obtained is taken into a system including a computer, for example, washing clothes of an appropriate size from a pre-listed ready-made product, or custom-made from the obtained data. It is possible to design clothes. With such a system, it is possible to automatically measure the body size at home and send it to a commercial site via an internet line, etc., eliminating the process of customers visiting clothing stores in the clothing distribution system. It becomes possible to do. Further, the present invention can be applied not only to the human body but also to animals and mechanical devices.

Claims (1)

A body measurement instrument having a garment made of an elastic material and an element attached so as to follow the deformation of the garment and presenting deformation information according to the expansion / contraction deformation.
The element that presents the deformation information according to the expansion and contraction deformation is a capacitor that has reversible elasticity, and the deformation information is the change in capacitance.
The garment made of the elastic material covers from the upper body to the crotch.
An anthropometric instrument characterized in that the reversibly elastic capacitor is attached to any of the following locations or sections of the clothing (1) to (3).
(1) At least around the chest, around the abdomen, or around the buttocks (2) At least one of the left and right shoulders to the back, or from the shoulders to the abdomen to the crotch (3) Neck to back, And / or the section from the neck through the abdomen to the crotch

Images