JP2019123965A - clothing - Google Patents

Abstract

To provide clothing for biological information measurement capable of measuring biological information stably and accurately, which is easy to wear and take off, and hardly gives a feeling of oppression or a feeling of discomfort when worn.SOLUTION: There is provided clothing formed with an electrode that comes in contact with the skin of a wearer. The clothing has a fabric including composite yarns of a core-sheath structure in which a core part and a sheath part are arranged. The sheath part is 15 mass% or more to the entire composite yarns, and the sheath part includes 50 mass% or more of long fibers to the entire sheath part. The core part includes hydrophilic staple fibers.SELECTED DRAWING: None

Description

  The present invention relates to a garment for measuring biological information in which an electrode that contacts the skin of a wearer is formed.

  BACKGROUND ART In recent years, wearable biological information measuring devices (sensing wear) have attracted attention in the fields of health monitoring, medical care, nursing care, and rehabilitation. The wearable biological information measuring device is a device in which a biological information measuring device is provided, for example, on clothes, a belt, a strap, etc., and by wearing them, biological information such as an electrocardiogram can be easily measured. As a living body information measuring device, the electrode for living body information measurement which contacts a wearer's skin is formed, for example.

  In the case of a wearable type wearable biological information measuring apparatus, for example, electrodes are provided on a body fabric made of a woven fabric or a knitted fabric, and by wearing this clothing and spending daily life, various situations of everyday life It is possible to easily measure biological information such as heart rate fluctuations in

  In order to increase the measurement accuracy of biological information in the wearable biological information measurement apparatus, it is necessary to bring the measurement surface of the electrode into close contact with the body. Therefore, in the case of a wearable wearable biological information measuring apparatus, a clothes body that strongly tightens the upper body such as compression wear is used as the clothes body, and the measurement surface of the electrode and the body are in close contact by this tightening. However, the wearer may feel a sense of oppression by being tightened. In addition, even when the compression wear is provided with a biological information measuring device, it has been difficult to stably and accurately measure biological information from the electrodes. In particular, when the subject performs exercise such as walking, jogging, running, etc., the measurement surface of the electrode and the body may not be in intimate contact with each other due to the action of the subject, and biological information is measured. There was something I could not do. In addition, compression wear is hard to break off because of high attachment pressure.

  The present inventors have specified a measurement position at which biological information can be most stably measured in Patent Document 1, and proposed a sensing ware in which a flexible electrode with high adhesion is attached.

Unexamined-Japanese-Patent No. 2017-29692

  The present invention has been made focusing on the problems as described above, and the purpose thereof is to make biological information stable even though it is easy to wear off, there is little feeling of pressure by wearing, and little feeling of discomfort. An object of the present invention is to provide clothing for measuring biological information that can be measured with high accuracy.

The clothing which concerns on this invention which could solve the said subject consists of the following structures.
[1] A garment comprising an electrode formed in contact with a wearer's skin, the garment having a fabric including a composite yarn of a core-sheath structure in which a core and a sheath are disposed, the sheath Is at least 15% by mass with respect to the entire composite yarn, the sheath includes 50% by mass or more of long fibers with respect to the entire sheath, and the core includes hydrophilic short fibers. Clothing to feature.
[2] The clothes according to [1], wherein the cloth is used on the side which comes in contact with the skin of the wearer.
[3] The electrode is composed of a conductive fabric, and the conductive fabric has an elongation of at least one of 3% to 60% when a load of 14.7 N is applied in the height direction or the width direction. The clothing as described in [1] or [2] which is the following.
[4] The clothes according to any one of [1] to [3], wherein the electrode contains at least a conductive filler and an elastomer.
[5] The clothing according to any one of [1] to [4], which covers at least one of a chest, a hand, a leg, a foot, a neck, or a face.
[6] The clothes according to any one of [1] to [5], wherein the clothes are underwear.

  The garment of the present invention has a fabric comprising a core yarn comprising a hydrophilic short fiber and a core / sheath composite yarn in which a sheath portion comprising 50% by mass or more of long fibers with respect to the entire sheath portion is disposed. The sheath portion is at least 15% by mass with respect to the entire composite yarn. Therefore, even if the clothes are wet, the clothes do not stick to the skin of the wearer and are excellent in skin releasability. As a result, even if the wearer moves, the clothing does not follow the movement of the wearer and is not pulled, and the electrodes formed on the clothing remain in close contact with the desired position, and the biological information can be measured with high accuracy. In addition, since it is not necessary to tighten the wearer like compression wear, the wearer does not feel a sense of pressure, can wear comfortably, and can easily wear off.

  In addition, the clothes of the present invention have good adhesion to electrode materials, wiring materials, insulating materials and the like. In general, hydrophilic fibers are known to have poor adhesion to hydrophobic adhesives. For example, the adhesion with hot melt adhesives to cotton fabrics heavily used as underwear is worse than the adhesion to synthetic synthetic fibers. On the other hand, in the present invention, hydrophilic short fibers are used for the core of the core-sheath structure, and at the same time long fibers (in particular, non-hydrophilic long fibers) are used for the sheath while making the entire garment hydrophilic. Adhesion to solvent-based adhesives and hot-melt adhesives mainly made of epoxy resin.

  Further, also in the case where the insulating resin is directly applied to the fabric, the occurrence of printing spots and adhesion spots is reduced more than in the case of a garment made of only hydrophilic fibers.

  The present inventors have intensively studied to provide clothes which can be worn comfortably while measuring biological information stably and accurately. As a result, as in the conventional case, if the clothes are easily separated from the wearer's skin instead of tightening the wearer with the clothes to improve the adhesion between the electrodes and the wearer's skin, the adhesion of the electrodes is inhibited. Since the feeling of tightening can be reduced by stably measuring biological information stably and accurately, and by increasing the skin releasability of the clothes, it has been found that it can be worn comfortably, and the present invention has been completed.

  Hereinafter, the clothes of the present invention will be described in detail.

  The clothing of the present invention is provided with an electrode that contacts the skin of the wearer. And the above-mentioned clothing has a material which contains a composite yarn of core-sheath structure in which a core part and a sheath part are arranged, and the sheath part is 15 mass% or more to the whole composite yarn, Is characterized in that it contains 50% by mass or more of long fibers with respect to the whole sheath part, and the core part contains hydrophilic short fibers.

  The clothing is provided with an electrode in contact with the skin of the wearer, and when the electrode surface of the electrode directly contacts the skin of the wearer, an electrical signal from the body can be measured, and biological information can be measured. . As biological information, for example, information on the body such as electrocardiogram, heart rate, pulse rate, respiration rate, blood pressure, body temperature, myoelectric potential, sweating, etc. is calculated by processing and processing an electrical signal acquired by an electrode with an electronic unit. can get.

  As said electrode, it is preferable to provide the electrode which can measure an electrocardiogram. The electrocardiogram means information detected as a waveform by detecting an electrical change due to the movement of the heart through an electrode on the surface of a living body. The electrocardiogram is generally recorded as a waveform in which time is plotted on the horizontal axis and potential difference is plotted on the vertical axis. The waveform appearing in the electrocardiogram at each heartbeat is mainly composed of five representative waves of P wave, Q wave, R wave, S wave and T wave, and U wave exists in addition to this. Also, from the beginning of the Q wave to the end of the S wave, it may be called a QRS wave.

Among these waves, the clothing of the present invention is preferably provided with an electrode capable of detecting at least R waves. The R wave indicates the excitation of both the left and right ventricles, and is the wave with the largest potential difference. The heart rate can also be measured by providing an electrode capable of detecting the R wave. That is, the time from the top of the R wave to the top of the next R wave is generally called an RR interval (seconds), and the heart rate per minute can be calculated based on the following equation. In the present specification, unless otherwise noted, the QRS wave is also included in the R wave.
Heart rate (times / minute) = 60 / RR interval

  The specific configuration of the electrode will be described in detail later.

  The garment has a fabric including a core-sheath composite yarn in which a core and a sheath are disposed. The sheath portion is 15% by mass or more with respect to the entire composite yarn, the sheath portion contains 50% by mass or more of long fibers with respect to the entire sheath portion, and the core portion has a hydrophilic short By including the fiber, even if the wearer's skin gets wet due to sweat or rain, the moisture is rapidly absorbed by the core through the sheath, so the clothing does not cling to the wearer's skin. Separation becomes better. As a result, even if the wearer moves, the clothes are not pulled because they do not follow the movement of the wearer. Therefore, the electrodes formed on the clothes remain in close contact with the desired position, so that biological information can be accurately measured. In addition, since it is not necessary to tighten the wearer like compression wear, the wearer does not feel a sense of pressure, can wear comfortably, and can easily wear off. In addition, since it is easy to detach and attach, disconnection of the electrode and the wiring hardly occurs.

(Shoulder)
By containing 50% by mass or more of the long fibers in the sheath portion, water such as sweat and rain can be easily transferred to the core portion, and the texture of the long fibers can be obtained, and the comfort is improved. In addition, since the strength of the entire composite yarn is also high, even if the composite yarn itself is thin, sufficient strength can be maintained, and it becomes easy to make a thin fabric suitable for spring and summer environments. 70 mass% or more is preferable, More preferably, it is 90 mass% or more, and the ratio of the long fiber to the said sheath part may be 100 mass%.

  Further, in the present invention, it is important that the sheath portion containing a predetermined amount or more of long fibers is 15% by mass or more with respect to the entire composite yarn. When the ratio of the sheath portion to the entire composite yarn is less than 15% by mass, moisture such as sweat and rain is less likely to move to the core portion, and the water transferred to the core portion is surfaced to make the skin separation worse. There is. The proportion of the sheath portion to the entire composite yarn is preferably 18% by mass or more, more preferably 20% by mass or more. The upper limit of the ratio of the sheath part to the whole composite yarn is, for example, preferably 70% by mass or less, more preferably 60% by mass or less, and still more preferably 50% by mass or less.

  The material of the long fibers contained in the sheath part is, for example, synthetic fibers such as polyester and nylon, regenerated fibers such as rayon and cupra, semi-synthetic fibers such as acetate and triacetate, inorganic fibers such as carbon fibers, natural fibers such as silk A fiber etc. are mentioned and one long fiber may be sufficient and 2 or more arbitrarily selected may be sufficient.

  The cross-sectional shape of the long fiber is not particularly limited.

  The average fineness of the long fibers is preferably 5 d or less, more preferably 3 d or less.

  The long fibers may be different contraction mixed long fibers including spontaneous extension.

  The long fibers preferably exhibit relatively hydrophobicity than hydrophilic short fibers described later.

  The long fibers preferably have an official moisture percentage of less than 5% as defined in JIS L0105. The official moisture content may be measured as a temperature of 20 ° C. and a relative humidity of 65%.

(Core)
The hydrophilic short fiber used for the core portion means a short fiber having an official moisture percentage of 5% or more defined by JIS L 0105, and the average fiber length of the short fiber is preferably 55 mm or less, for example. The official moisture content may be measured as a temperature of 20 ° C. and a relative humidity of 65%.

  Examples of the material of the hydrophilic short fiber include regenerated fibers such as rayon, polynozic and cupra, semi-synthetic fibers such as acetate and triacetate, natural fibers such as cotton, hemp and wool, polyester, other synthetic fibers, or these Mixed fiber of

  The cross-sectional shape of the short fiber is not particularly limited.

  The average fineness of the short fibers is preferably 3.5 d or less, more preferably 3 d or less.

  The proportion of the core part and the sheath part in the entire composite yarn is preferably 40 to 85%: 15 to 60% by mass. If the core portion is less than 40% by mass, the water absorbability may be deteriorated and the skin separation may be deteriorated. On the other hand, when the sheath part is less than 15% by mass, the moisture transferred to the core part may be surfaced to make the skin separation worse.

  The shaft of the core portion may include a shaft made of long fibers. As the long fibers used as the shaft, those exemplified for the above-mentioned sheath part can be used.

  The fabric containing the composite yarn of the above-mentioned core-sheath structure may be used for at least a part of the above-mentioned clothes, and may be used for all of the above-mentioned clothes.

  Moreover, the fabric containing the composite yarn of the above-mentioned core-sheath structure may be used at least on the side that contacts the wearer's skin, or even if another different known material is formed on the side not contacting the skin (outside) Good.

  The clothing of the present invention may be formed of an electrode that contacts the wearer's skin, and the form is not particularly limited. For example, sports inners, T-shirts, polo shirts, camisole, underwear, underwear, sick clothes, or Sleepwear and the like can be mentioned. Among these, underwear is preferred.

  When the above garment has a sleeve, it may be a short sleeve, a half sleeve, a third sleeve, a long sleeve, etc., and the shape of the sleeve may be a raglan sleeve.

  The garment preferably covers at least one of the chest, hands, legs, feet, neck or face.

  Next, an electrode provided on the above-mentioned clothes will be described.

  The electrode preferably has stretchability so as to follow the movement of the subject.

  Examples of the stretchable electrode include an electrode made of a conductive fabric and a sheet-like electrode formed of a conductive composition containing a conductive filler and a resin having flexibility.

  As an electrode comprised with the said conductive fabric, the surface is coat | covered with the conductive fiber or conductive yarn which coat | covered the conductive polymer to the base material fiber, or conductive metals, such as silver, gold, copper, nickel, for example Non-conductive fabric, woven fabric, non-woven fabric, or conductive yarn composed of conductive yarn composed of fine wire of conductive metal, conductive yarn composed of fine wire of conductive metal and non-conductive fiber etc. The material embroidered on the fabric of the above can be used as an electrode made of a conductive fabric.

  The conductive fabric preferably has an elongation of at least one of 3% to 60% when a load of 14.7 N is applied in the height direction or the width direction. When the elongation rate is lower than the lower limit value, the electrode may not sufficiently follow the movement of the fabric of the clothes, and the electrode may be peeled off from the fabric. Accordingly, the elongation rate is preferably 3% or more, more preferably 5% or more, and still more preferably 10% or more. However, if the extension rate exceeds the upper limit value, the electrode may be stretched too much and the biological information may not be accurately measured. Accordingly, the elongation rate is preferably 60% or less, more preferably 55% or less, and still more preferably 50% or less.

  The elongation ratio preferably satisfies the above range in the length direction or the width direction, and more preferably satisfies the above range in both the height direction and the width direction.

  As a material of the sheet-like electrode, for example, by using a conductive filler having high conductivity, the electric resistance value can be made lower than that of a fibrous electrode, so that a weak electric signal can be detected.

  The electrode preferably includes a conductive layer capable of detecting electrical information of a living body, and further preferably has an insulating layer on the opposite side to the skin, ie, on the garment side of the conductive layer. Hereinafter, the insulating layer on the garment side may be referred to as a first insulating layer.

  In addition to the electrodes, the clothing has a wire connecting the electrodes and an electronic unit or the like having a function of calculating the electric signal acquired by the electrodes. The wiring includes a conductive layer for transmitting an electrical signal of a living body detected by an electrode to an electronic unit or the like, and further, an insulating layer (first insulating layer) on the garment side of the conductive layer It is preferable to have. The wiring preferably has an insulating layer also on the skin side of the conductive layer. Hereinafter, the insulating layer on the skin side may be referred to as a second insulating layer.

  The conductive layer, the first insulating layer, and the second insulating layer will be specifically described below.

(Conductive layer)
The conductive layer is necessary to ensure conduction.

  The conductive layer preferably contains a conductive filler and a resin having flexibility, more preferably a conductive filler and an elastomer, and a composition in which each component is dissolved or dispersed in an organic solvent (hereinafter referred to as It may be formed using conductive paste).

  As the conductive filler, for example, metal powder, metal nanoparticles, and conductive materials other than metal powder can be used. The conductive filler may be used alone or in combination of two or more.

  Examples of the metal powder include silver powder, gold powder, platinum powder, noble metal powder such as palladium powder, copper powder, nickel powder, aluminum powder, base metal powder such as brass powder, inorganic particles such as base metal and silica, silver And plated powders plated with a noble metal such as, and an alloyed base metal powder alloyed with a base metal and a noble metal such as silver. Among these, silver powder and / or copper powder are preferable, and high conductivity can be exhibited at low cost.

  As said metal powder, it is preferable to use mainly (for example, 50 mass% or more) mainly on flake shaped powder or an irregular shaped aggregated powder. Flaky powder and amorphous agglomerated powder are preferable because they have a larger specific surface area than spherical powder and the like, and can form a conductive network even with a low loading amount.

  The particle diameter of the flake-like powder is not particularly limited, but the average particle diameter (50% D) measured by a dynamic light scattering method is preferably 0.5 to 20 μm, more preferably 3 to 12 μm. When the average particle size exceeds 20 μm, the formation of fine wiring may be difficult. When the average particle size is less than 0.5 μm, in low loading, the particles can not be in contact with each other, and the conductivity may be deteriorated. For example, it is preferable to use flaky silver powder as the flaky powder.

  The above-mentioned irregular-agglomerated powder is a three-dimensional aggregation of spherical or irregular-shaped primary particles. Since the above-mentioned irregularly shaped agglomerated powder is not in the form of monodispersion, it is more preferable because the particles are in physical contact with each other and thus it is easy to form a conductive network.

  For example, it is preferable to use amorphous aggregated silver powder as the amorphous aggregated powder.

  Among the metal powders described above, the metal nanoparticles mean particles having a particle size of several nano to several tens nano.

  The content of the metal nanoparticles in the conductive filler is preferably 20% by volume or less, more preferably 15% by volume or less, and still more preferably 10% by volume or less. If the content ratio of the metal nanoparticles is too large, it may be difficult to uniformly disperse in the resin, and since the metal nanoparticles as described above are generally expensive, the amount used may be suppressed to the above range. desirable.

  Examples of the conductive material other than the metal powder include carbon-based materials such as graphite, carbon black and carbon nanotubes. The conductive material other than the metal powder preferably has on its surface a mercapto group, an amino group, or a nitrile group, or the surface is surface-treated with a rubber containing a sulfide bond and / or a nitrile group. Generally, conductive materials other than metal powders themselves have strong cohesion, and conductive materials other than metal powders having a high aspect ratio have poor dispersibility in resin, but they have a mercapto group, amino group or nitrile group on the surface. Alternatively, by being surface-treated with a rubber containing a sulfide bond and / or a nitrile group, the affinity to the resin is increased, the resin can be dispersed, an effective conductive network can be formed, and high conductivity can be realized.

  The proportion of the conductive material other than the metal powder in the conductive filler is preferably 20% by volume or less, more preferably 15% by volume or less, and still more preferably 10% by volume or less. If the content ratio of the conductive material other than the metal powder is too large, it may be difficult to uniformly disperse in the resin, and since the conductive material other than the metal powder as described above is generally expensive, It is desirable to reduce the amount used.

  The conductive layer is obtained by laminating or arranging two or more types of conductive layers in which the type of conductive filler, the addition amount of the conductive filler, and the like are changed, and a plurality of conductive layers are integrated. I don't care.

  The conductive layer may contain nonconductive particles, and the nonconductive particles preferably have an average particle size of 0.3 to 10 μm.

  As the non-conductive particles, for example, particles of metal oxide can be used, and specifically, metal such as silicon oxide, titanium oxide, magnesium oxide, calcium oxide, aluminum oxide, iron oxide, barium sulfate particles and the like Sulfates, metal carbonates, metal titanates and the like can be used. Among these, it is preferable to use barium sulfate particles.

  Examples of the resin having flexibility include thermoplastic resins having an elastic modulus of 1 to 1000 MPa, thermosetting resins, and rubber, but rubber is preferable in order to develop the stretchability of the film. The resin having flexibility may be one kind or two or more kinds.

  The elastic modulus of the resin having flexibility is more preferably 3 to 600 MPa, still more preferably 10 to 500 MPa, and particularly preferably 30 to 300 MPa.

  Examples of the rubber include urethane rubber, acrylic rubber, silicone rubber, butadiene rubber, nitrile group-containing rubber such as nitrile rubber and hydrogenated nitrile rubber, isoprene rubber, sulfurized rubber, styrene butadiene rubber, butyl rubber, chloroprene rubber, chlorosulfone Polyethylene rubber, ethylene propylene rubber, vinylidene fluoride copolymer and the like. Among these, nitrile group-containing rubber, chloroprene rubber and chlorosulfonated polyethylene rubber are preferable, and nitrile group-containing rubber is particularly preferable.

  The nitrile group-containing rubber is not particularly limited as long as it is a nitrile group-containing rubber or elastomer, but nitrile rubber and hydrogenated nitrile rubber are preferable. Nitrile rubber is a copolymer of butadiene and acrylonitrile, and when the amount of bound acrylonitrile is large, the affinity to metal increases, but the rubber elasticity contributing to the stretchability decreases conversely. Accordingly, the amount of bound acrylonitrile in the acrylonitrile butadiene copolymer rubber is preferably 18 to 60% by mass, and particularly preferably 40 to 55% by mass.

  The conductive layer may be formed directly on the first insulating layer described later, using a composition (conductive paste) in which each component described above is dissolved or dispersed in an organic solvent, or applied or printed in a desired pattern. It can be formed by forming a coating, volatilizing the organic solvent contained in the coating and drying it. The said conductive layer apply | coats or prints the said conductive paste on a release sheet etc., forms a coating film, and volatilizes the organic solvent contained in this coating film, and it makes it dry by making it dry. May be laminated on a first insulating layer described later in a desired pattern.

  The conductive paste may be prepared by employing a conventionally known method of dispersing powder in a liquid, and can be prepared by uniformly dispersing the conductive filler in a resin having flexibility. For example, after mixing a resin solution with metal powder, metal nanoparticles, a conductive material other than metal powder, etc., the resin solution may be uniformly dispersed by an ultrasonic method, a mixer method, a three roll mill method, a ball mill method or the like. These means can be used in combination of two or more.

  The method for applying or printing the above conductive paste is not particularly limited, but, for example, coating method, screen printing method, lithographic offset printing method, inkjet method, flexographic printing method, gravure printing method, gravure offset printing method, stamping method, dispense method It is possible to adopt a printing method such as a law, squeegee printing, etc.

  The dry film thickness of the conductive layer is preferably 10 to 150 μm, more preferably 20 to 130 μm, and still more preferably 30 to 100 μm. If the dry film thickness of the conductive layer is too thin, the electrode and the wiring may be repeatedly subjected to expansion and contraction to be deteriorated, and the conduction may be interrupted or interrupted. On the other hand, when the dry film thickness of the conductive layer is too thick, the stretchability is impaired, and the electrode and the wiring become too thick, which may make the wearing comfort worse.

(First insulating layer)
The first insulating layer not only acts as an insulating layer, but also acts as an adhesive layer for forming a conductive layer of the electrode and the wiring on the fabric, and the other side of the fabric on which the first insulating layer is laminated when worn Act as a water blocking layer to prevent water from the outside of the clothes from reaching the conductive layer. In addition, by providing the first insulating layer on the garment side of the conductive layer, the first insulating layer can suppress the elongation of the fabric and prevent the conductive layer from being excessively stretched. As a result, it is possible to prevent the occurrence of cracks in the first insulating layer. On the other hand, as described above, although the conductive layer has good extensibility, when the fabric is a material having high extensibility beyond the extensibility of the conductive layer, the conductive layer is directly applied to the surface of the fabric. When formed, the conductive layer is stretched too much in accordance with the elongation of the fabric, and as a result, it is considered that the conductive layer is cracked.

  The first insulating layer may be made of an insulating resin, and the type of resin is not particularly limited.

  As said resin, a polyurethane-type resin, silicone type resin, vinyl chloride type resin, an epoxy-type resin, polyester elastomer etc. can be used preferably, for example. Among these, polyurethane resins are more preferable, and the adhesion to the conductive layer is further improved.

  The resin constituting the first insulating layer may be only one type, or two or more types.

  Although the method of forming the first insulating layer is not particularly limited, for example, a resin having an insulating property is dissolved or dispersed in a solvent (preferably water) and applied or printed on a release paper or a release film, and then coated. It can be formed by forming a film and evaporating the solvent contained in the coating to dry it. Moreover, the resin sheet or resin film marketed can also be used.

  The average film thickness of the first insulating layer is preferably 10 to 200 μm. If the first insulating layer is too thin, the insulating effect and the anti-elongating effect may be insufficient. Therefore, the average film thickness of the first insulating layer is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 40 μm or more. However, if the first insulating layer is too thick, the stretchability of the electrode and the wiring may be impaired. In addition, there is a possibility that the electrode and the wiring become too thick and the wearing comfort is deteriorated. Therefore, the average film thickness of the first insulating layer is preferably 200 μm or less, more preferably 180 μm or less, and still more preferably 150 μm or less.

(Second insulating layer)
The wiring preferably has a second insulating layer formed on the conductive layer. By providing the second insulating layer, for example, moisture such as rain, snow, and sweat can be prevented from contacting the conductive layer.

  As resin which comprises the said 2nd insulating layer, the thing similar to resin which comprises the 1st insulating layer mentioned above is mentioned, Resin used preferably is also the same.

  The resin constituting the second insulating layer may be only one type, or two or more types.

  The resin constituting the second insulating layer may be the same as or different from the resin constituting the first insulating layer, but is preferably the same. By using the same resin, it is possible to reduce the coverage of the conductive layer and the damage of the conductive layer due to the stress deviation at the time of expansion and contraction of the wiring.

  The second insulating layer can be formed in the same manner as the first insulating layer. Moreover, the resin sheet or resin film marketed can also be used.

  The average film thickness of the second insulating layer is preferably 10 to 200 μm. If the second insulating layer is too thin, the second insulating layer may be easily deteriorated when it is repeatedly expanded and contracted, and the insulating effect may be insufficient. Therefore, the average film thickness of the second insulating layer is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 40 μm or more. However, if the second insulating layer is too thick, the stretchability of the wiring may be impaired, and the thickness of the wiring may be too thick, resulting in poor fit. Therefore, the average film thickness of the second insulating layer is preferably 200 μm or less, more preferably 180 μm or less, and still more preferably 150 μm or less.

  It is preferable that the load per unit width applied to the electrode and the wiring at 10% elongation be 100 N / cm or less. When the load per unit width applied at 10% extension exceeds 100 N / cm, the extension of the electrode and the wiring becomes difficult to follow the extension of the fabric, which may impair the comfort when the clothes are worn. Therefore, the load per unit width applied at 10% elongation is preferably 100 N / cm or less, more preferably 80 N / cm or less, and still more preferably 50 N / cm or less.

  The electrode and the wiring preferably have a change magnification of electric resistance at 20% elongation of 5 or less. When the change ratio of the electrical resistance at 20% elongation exceeds 5 times, the conductivity drops significantly. Therefore, the change ratio of the electrical resistance at 20% elongation is preferably 5 times or less, more preferably 4 times or less, and still more preferably 3 times or less.

  Although the said electrode and wiring may be comprised with a different material, it is preferable to be comprised with the same material.

  When the electrode and the wiring are made of the same material, the width of the wiring is preferably 1 mm or more, more preferably 3 mm or more, and still more preferably 5 mm or more. The upper limit of the wire width is not particularly limited, but is preferably 10 mm or less, more preferably 9 mm or less, and still more preferably 8 mm or less.

  It is preferable to form the said electrode and wiring directly in the cloth which comprises clothing.

  The method of forming the electrodes and the wiring on the fabric is not particularly limited as long as it does not disturb the stretchability of the electrodes and the wiring, and the fitness to the body when worn, the ability to follow during exercise, etc. From the viewpoint, for example, a known method such as lamination with an adhesive or lamination with a hot press can be adopted. When laminating with an adhesive or laminating with a hot press, it is desirable that the material does not have a material that impairs adhesion, such as a silicon-based softener or a fluorine-based water repellent. The silicone softener and fluorine-based water repellent attached to the fabric can be removed by scouring in the dyeing process of the fabric, or by selecting the type of processing agent to be used when finishing the fabric, etc. It can be adjusted.

  The electrode is preferably provided on the chest or lower chest of the garment. The biological information can be measured with high accuracy by providing the above-mentioned electrode on the thorax part or the lower thorax part of the clothes. More preferably, the electrode is provided in an area of the garment in contact with the skin between the upper end and the lower end of the seventh rib of the wearer.

  The above-mentioned electrode is a line parallel to the posterior axillary line on the left and right of the wearer among the clothes, and is surrounded by lines drawn 10 cm away from the posterior axillary line on the wearer's back side Preferably, it is provided in the ventral region of the person.

  The electrodes are preferably provided in an arc shape along the waist of the wearer.

  The number of electrodes provided on the garment is at least two, and two electrodes are preferably provided on the chest or lower thoracic abdomen of the garment, and the two electrodes are parallel to the left and right posterior axillary lines of the wearer It is preferable to provide in the area | region of the belly side of a wearer enclosed with lines which are a line | wire and which was drawn 10 cm away on the back side of a wearer from a posterior axillary line of a wearer. When three or more electrodes are provided, the positions at which the third and subsequent electrodes are provided are not particularly limited, and may be provided, for example, on the back body cloth.

  The electrical resistance value of the electrode surface is preferably 1000 Ω / cm or less, more preferably 300 Ω / cm or less, still more preferably 200 Ω / cm or less, and particularly preferably 100 Ω / cm or less. In particular, when the form of the electrode is sheet-like, the electric resistance value of the electrode surface can be usually suppressed to 300 Ω / cm or less.

  The form of the electrode is preferably in the form of a sheet. By forming the electrode into a sheet shape, the electrode surface can be widened, so that the contact area with the skin of the wearer can be secured. The sheet-like electrode preferably has good bendability. The sheet-like electrode preferably has stretchability.

The size of the sheet-like electrode is not particularly limited as long as an electrical signal from the body can be measured, but the area of the electrode surface is 5 to 100 cm ² , and the average thickness of the electrode is preferably 10 to 500 μm.

The area of the electrode surface is more preferably 10 cm ² or more, still more preferably 15 cm ² or more. The area of the electrode surface is more preferably 90 cm ² or less, still more preferably 80 cm ² or less.

  If the electrode is too thin, the conductivity may be insufficient. Therefore, the average thickness is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 50 μm or more. However, if the thickness is too thick, the wearer may feel a foreign object feeling, which may cause discomfort. Accordingly, the average thickness is preferably 500 μm or less, more preferably 450 μm or less, and still more preferably 400 μm or less.

  The shape of the electrode is not particularly limited as long as it conforms to the curve of the body corresponding to the position where the electrode is disposed and is a shape that easily adheres to the movement of the body, for example, a square, triangle, pentagon or more A square, a circle, an ellipse, etc. are mentioned. When the shape of the electrode is a polygon, the apex may be rounded so as not to damage the skin.

  The wiring may be formed using conductive fibers or conductive threads.

  As the conductive fiber or conductive yarn, one obtained by plating a metal on the surface of an insulating fiber, one obtained by twisting a thin metal wire into a yarn, and impregnating conductive polymers between fibers such as microfiber And thin metal wires can be used.

  As for the average thickness of the said wiring, 10-500 micrometers is preferable. If the thickness is too thin, the conductivity may be insufficient. Therefore, the average thickness is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 50 μm or more. However, if the thickness is too thick, the wearer may feel a foreign object feeling, which may cause discomfort. Accordingly, the average thickness is preferably 500 μm or less, more preferably 450 μm or less, and still more preferably 400 μm or less.

  The shape of the wiring is not particularly limited, and it may be a geometric pattern having redundancy, in addition to straight lines and curves. The geometric pattern having redundancy includes, for example, a zigzag shape, a continuous horseshoe shape, and a wave shape. The electrodes of the geometric pattern having redundancy can be formed, for example, using a metal foil.

  It is preferable that the said clothing is equipped with the electronic unit etc. which have the function to calculate the electric signal acquired by the electrode. In the electronic unit or the like, biological information such as, for example, electrocardiogram, heart rate, pulse rate, respiration rate, blood pressure, body temperature, myoelectricity, and sweating can be obtained by calculating and processing the electric signal acquired by the electrode.

  It is preferable that the said electronic unit etc. can be attached or detached to clothing.

  The electronic unit or the like preferably further includes a display unit, a storage unit, a communication unit, a USB connector, and the like.

  The electronic unit or the like may include, for example, a sensor capable of measuring environmental information such as air temperature, humidity, barometric pressure, and a sensor capable of measuring positional information using GPS.

  By using the above-mentioned clothes, application to a technique for grasping a person's mental state or physiological state can also be performed. For example, mental training can be performed by detecting the degree of relaxation, sleepiness can be detected, drowsy driving can be prevented, and an electrocardiogram can be measured to perform depression or stress diagnosis.

  EXAMPLES Hereinafter, the present invention will be more specifically described by way of examples. However, the present invention is of course not limited by the following examples, and the present invention is practiced with addition of changes as long as they can conform to the above Of course, it is also possible, and all are included in the technical scope of the present invention.

  A garment having an electrode formed in contact with the wearer's skin was manufactured and evaluated for releasability when wet.

(Invention example)
As the above-mentioned garment, a garment comprising a fabric comprising a composite yarn of a core-sheath structure in which a core part and a sheath part are arranged was manufactured. Specifically, a composite yarn containing 23% by mass of the sheath portion with respect to the entire composite yarn was used. The sheath portion was 100% by mass of long fibers made of polyester. The fineness of the long fibers was 30 d, and the cross-sectional shape was a triangular cross section. Cotton was used as a hydrophilic short fiber in the core of the composite yarn. The composite yarn was an English-style cotton count number 40.

  The hydrophilic short fiber used for the core of the composite yarn had an official moisture percentage of 0.4% as defined in JIS L0105. The official moisture content was measured at a temperature of 20 ° C. and a relative humidity of 65%.

  The composite yarn was knitted using a 28 gauge single knitting machine, and the knitted yarn length of the composite yarn was 260 mm / 100 W, and the polyurethane 22T was drafted 2.6 times to knit a bare tangle.

(Comparative example 1)
Using a U.S. cotton superma 100% cotton-count 40th count coma yarn [C40 s] and carrying the same conditions as in the above-mentioned inventive example, a bare tangle was knitted with a 28 gauge single knitting machine.

(Comparative example 2)
As the above-mentioned garment, a garment comprising a fabric comprising a composite yarn of a core-sheath structure in which a core part and a sheath part are arranged was manufactured. Specifically, a composite yarn containing 11% by mass of the sheath portion with respect to the entire composite yarn was used. The sheath portion was 100% by mass of long fibers made of polyester. The fineness of the long fiber was 15 d, and the cross-sectional shape was round. In the core of the composite yarn, the same cotton as in the above-mentioned invention example was used as hydrophilic short fibers. The composite yarn was an English-style cotton count number 40.

  Using the above-mentioned composite yarn, a bare tangle was knitted with a 28-gauge single knitting machine under the same conditions as the above-mentioned invention example.

  Next, the obtained bare pemphigum was subjected to a dyeing process to produce a dough having a well density of 38 / inch and a course density of 52 / inch.

  Next, while forming an electrode and wiring in the obtained fabric, the electronic unit was attached and the said clothes were manufactured.

  The electrodes and wires were formed in the following procedure.

(Conductive paste)
20 parts by mass of nitrile rubber ("Nipol DN003" manufactured by Nippon Zeon Co., Ltd.) was dissolved in 80 parts by mass of isophorone to prepare an NBR solution. To 100 parts by mass of the obtained NBR solution, 110 parts by mass of silver particles ("aggregated silver powder G-35" manufactured by Dowa Electronics Co., Ltd., average particle diameter 5.9 μm) are blended, and they are kneaded using a three-roll mill to obtain conductive paste. Obtained.

(Electrode and wiring)
The conductive paste was applied onto a release sheet, and dried in a hot air drying oven at 120 ° C. for 30 minutes or more to prepare a sheet-like conductive layer with a release sheet.

Next, a polyurethane hot melt sheet was attached to the surface of the conductive layer of the sheet-like conductive layer with release sheet, and then the release sheet was peeled off to obtain a sheet-like conductive layer with polyurethane hot melt sheet. The polyurethane hot melt sheet was laminated using a hot press under a pressure of 0.5 kg / cm ² , a temperature of 130 ° C., and a pressing time of 20 seconds.

  Next, on the polyurethane hot melt sheet having a length of 13 cm and a width of 2.4 cm, the polyurethane hot melt sheet side of the sheet-like conductive layer having a length of 12 cm and a width of 2 cm is aligned with one end in the length direction. The resultant was laminated to prepare a laminate of a polyurethane hot melt sheet and a sheet-like conductive layer. The polyurethane hot melt sheet corresponds to the first insulating layer described above.

  Next, the same polyurethane hot melt sheet as that in which the first insulating layer is formed in a region of 5 cm in length and 2.4 cm in width so as to cover the first insulating layer and a part of the conductive layer is 2 cm from the end. The second insulating layer was formed on part of the conductive layer by laminating from a separated part. That is, a device connection of 2 cm in length × 2 cm in width in which the conductive layer is exposed at the end, an insulating part having a laminated structure of first insulating layer / conductive layer / second insulating layer, and the conductive layer exposed at the opposite end A stretchable electrode part was produced, in which 5 cm long × 2 cm wide electrodes were arranged in this order in the longitudinal direction.

Next, two stretchable electrode parts are pasted in a laterally symmetrical manner at a predetermined position on the inner side of the front body fabric of the obtained garment, that is, on the side where the electrode surface contacts the wearer's skin, Manufactured clothing. The number of electrodes provided on the front body cloth was two, the total area of the electrode surfaces of the ^two electrodes was 22 cm ² , and the average thickness of the electrodes was 90 μm.

  Next, the skin releasability of the material provided with the electrode was evaluated.

Skin separation was evaluated based on the maximum static friction coefficient. Specifically, using a surface tester KES-SE manufactured by Kato Tech, a test material collected to a size of 12 mm wide and 50 mm long from each sample is pasted so as to cover the KES-SE friction element. After application, the wet test material to which 0.05 ml (about 80 g / m ² equivalent) of pure water is applied, 1.0 part by mass of oleic acid, 0.8 parts by mass of squalene, trio per 100 parts by mass of ethanol The maximum coefficient of static friction between a film (made of PET, thickness 38 μm) applied with artificial sebum consisting of 2.0 parts by weight of rhein was measured. The load was 25 g / cm ² and the sensitivity was H. In the present invention, the case where the maximum static friction coefficient was 3.0 or less was regarded as pass, and it was evaluated that the skin releasability was excellent.

  The maximum static friction coefficient of the fabric obtained in the invention example was 2.4, and it was excellent in skin releasability. On the other hand, the maximum static friction coefficient of the dough obtained in Comparative Example 1 was 3.7, and the maximum static friction coefficient of the dough obtained in Comparative Example 2 was 3.2. Therefore, in the clothing using the fabric obtained in the invention example, the clothing is quickly separated from the skin even when it is wetted, so the electrodes are not pulled and peeled off from the skin, so biological information can be measured stably and accurately. .

Claims (6)

A garment having an electrode formed thereon that contacts the wearer's skin,
The garment comprises a fabric comprising a core-sheath composite yarn having a core and a sheath disposed thereon,
The sheath portion is at least 15% by mass with respect to the entire composite yarn,
The sheath portion contains 50% by mass or more of long fibers with respect to the entire sheath portion,
The clothing characterized in that the core portion includes hydrophilic short fibers.   The clothes according to claim 1, wherein the cloth is used on the side of the clothes to be in contact with the skin of the wearer. The electrodes are composed of a conductive fabric,
The clothes according to claim 1 or 2, wherein the conductive fabric has an elongation of at least one of 3% to 60% when a load of 14.7 N is applied in the length direction or the width direction.   The clothing according to any one of claims 1 to 3, wherein the electrode contains at least a conductive filler and an elastomer.   The garment according to any one of claims 1 to 4, wherein the garment covers at least one of a chest, a hand, a leg, a foot, a neck, or a face.   The clothes according to any one of claims 1 to 5, wherein the clothes are underwear.