JPWO2018173749A1 - Conductive composite sheet - Google Patents

Abstract

A conductive composite sheet 10 to be attached to clothes, which is arranged in a desired pattern on one surface of the first thermoplastic resin sheet 1 having elasticity and the first thermoplastic resin sheet 1 A second thermoplastic material comprising a conductive thread 5, which is formed of a metal plating thread obtained by attaching a metal component to a core thread, and stretched and sewn in the desired pattern using the conductive thread 5. A resin sheet 2 is combined and integrated with the first thermoplastic resin sheet 1. Provided is a conductive composite sheet that has sufficient stretchability and can ensure good comfort when worn on clothes.

Description

  The present invention relates to a conductive composite sheet attached to clothes for a wearable device that measures biological information such as body temperature, heart rate, electrocardiogram, electromyogram and the like.

  BACKGROUND In recent years, wearable devices that measure various types of biological information by being attached to clothes or the like have attracted attention. Such wearable devices are attached to clothes, and wiring members that electrically connect the electrodes disposed at measurement points and the wearable devices are incorporated in the clothes.

  Patent Document 1 discloses a conductive fabric which maintains high conductivity even when stretched. The conductive fabric is a conductive fabric in which a wire is provided on the fabric, and the wire is a first insulating layer formed on the fabric, a conductive layer provided on the first insulating layer, and a conductive layer. It includes a second insulating layer provided on the layer, and is configured such that the resistance change magnification at 100% elongation in the longitudinal direction of the wiring is 100 times or less at 0% elongation.

  And the said electroconductive layer is comprised by apply | coating or printing the electroconductive paste containing an electroconductive filler and resin on a 1st insulating layer.

WO 2016/114339 WO 2016/114298

  However, the conductive fabric described in Patent Document 1 needs to properly control the amount of the conductive filler added so as to ensure the desired stretchability and to prevent the occurrence of cracks at the time of elongation. It is necessary to properly manage the film thickness at the time of printing so as not to cause deterioration, and complicated management of the manufacturing process has been required.

  An object of the present invention is to provide a conductive composite sheet having sufficient stretchability and capable of securing a good touch when attached to a fabric, in view of the problems described above.

  In order to achieve the above-mentioned object, the first characterizing feature of the conductive composite sheet according to the present invention is, as described in claim 1, a conductive composite sheet attached to a fabric, which has elasticity. It is in the point provided with the thermoplastic resin sheet of 1, and the conductive yarn arranged in a desired pattern on one surface of the first thermoplastic resin sheet.

  A predetermined wiring pattern is formed by the conductive yarn disposed on one surface of the first thermoplastic resin sheet. By using the conductive yarn, a desired curved shape or bent shape can be realized with a high degree of freedom. Even if bent, the conductive yarn does not break easily, and a good and highly reliable conductive composite sheet is obtained which does not cause deterioration of the touch even when it is attached to a fabric.

  In the second feature, as described in claim 2, in addition to the first feature described above, the conductive yarn is a metal-coated yarn in which a metal component is adhered to a core yarn, The second thermoplastic resin sheet stretch-stitched in the desired pattern using a conductive yarn is composite integrated with the first thermoplastic resin sheet.

  The conductive yarn itself is stretch-stitched to the second thermoplastic resin sheet using a metal-coated yarn, and the second thermoplastic resin sheet is composite integrated with the first thermoplastic resin sheet to stretch the conductive yarn itself. Since the wiring pattern is drawn by stretch sewing even if it does not have the properties, the stretchability appears as a unit with the first and second thermoplastic resin sheets. Since it is sufficient to stretch and sew in a predetermined pattern using a sewing machine, it is possible to respond flexibly to any change without raising the cost of equipment even if it is a multi-product small-quantity production.

  As described in the third aspect of the invention, in addition to the above-mentioned second aspect of the invention, any one of overlock stitching, flat stitching, chain stitching, and zigzag stitching may be employed as the telescopic stitching. The point is.

  Since any of overlock stitching, flat stitching, chain stitching, and zigzag stitching can be adopted as telescopic stitching, the range of choices of usable sewing machines can be expanded, and equipment cost can be suppressed.

  According to a fourth aspect of the present invention, in addition to the first aspect, as described in the fourth aspect, the conductive yarn is a covering yarn in which a metal-coated yarn is wound around an elastic core yarn. Non-stretchable or stretch-stitched in the desired pattern by attaching a non-elastic yarn to the conductive yarn, or using a non-elastic yarn for at least one of the upper yarn and the lower yarn while using the conductive yarn The second thermoplastic resin sheet is composite integrated with the first thermoplastic resin sheet.

  Using a covering yarn in which a metal-coated yarn is wound around a stretchable core yarn as a conductive yarn, a second thermoplastic resin sheet is subjected to a sewing process to draw a wiring pattern, and the second thermoplastic resin sheet is used as a first The composite integration with the thermoplastic resin sheet makes it possible to realize a wiring pattern having elasticity as a united body with the first and second thermoplastic resin sheets. For example, even if sewing with only stretchable conductive threads is difficult due to insufficient tension of the stretchable conductive threads, non-stretchable threads can be added to the stretchable conductive threads to achieve sewing. It is possible to sew stably while securing the enduring tension. Also, for example, a desired pattern can be arranged by using a non-stretchable thread for the upper thread and using a stretchable conductive thread for the lower thread and stitching the second thermoplastic resin sheet to the desired pattern. A desired pattern can also be arranged by using a stretchable conductive yarn and using a non-stretchable yarn for the lower yarn to lock onto the second thermoplastic resin sheet.

  According to the fifth feature of the present invention, in addition to the first feature described above, the conductive yarn is a covering yarn in which a metal-coated yarn is wound around an elastic core yarn. The present invention is in that the first thermoplastic resin sheet is combined and integrated.

  A conductive yarn is obtained by using a covering yarn in which a metal-coated yarn is wound around a stretchable core yarn as a conductive yarn, and arranging it in a desired pattern on one surface of the first thermoplastic resin sheet for composite integration. As such, it expands and contracts as the first thermoplastic resin sheet expands and contracts.

  According to the sixth aspect, as described in the sixth aspect, in addition to the first aspect described above, the first thermoplastic resin sheet is formed of a laminate of thermoplastic resin layers having different melting points. The point is.

  In the first thermoplastic resin sheet composed of a laminate of thermoplastic resin layers having different melting points, the low melting point thermoplastic resin layer functions as a fusion layer, and the high melting point thermoplastic resin layer is retained. It functions as a form layer.

  According to the seventh characteristic structure, as described in the seventh aspect, in addition to the sixth characteristic structure described above, the conductive yarn is combined and integrated with the thermoplastic resin layer on the low melting side of the laminate. The point is.

  Of the first thermoplastic resin sheet composed of a laminate of thermoplastic resin layers having different melting points, the conductive yarns arranged in a desired pattern are fused to the surface of the thermoplastic resin layer on the low melting side, thereby making the composite Integrated.

  According to an eighth characterizing feature, as described in the same claim 8, in addition to the sixth or seventh characterizing feature described above, the first thermoplastic resin sheet sandwiches a high melting point thermoplastic resin layer. It is in the point comprised by the laminated body by which the low melting point thermoplastic resin layer was distribute | arranged to the both sides.

  The conductive yarns arranged in a desired pattern are fused and compositely integrated on the surface of one low melting point thermoplastic resin layer sandwiching the high melting point thermoplastic resin layer, and the other low melting point thermoplastic resin layer For example, the mounting portion for mounting the conductive composite sheet is fused.

  According to the ninth characteristic structure, as described in the ninth aspect, in addition to any of the fifth to eighth characteristic structures described above, the electric conduction combined and integrated with the first thermoplastic resin sheet It is in the point in which the thermoplastic resin sheet for protection is further laminated | stacked facing the thread | yarn.

  The conductive yarn is covered with a protective thermoplastic resin sheet so that the conductive yarn is not worn out by contact with any object.

  According to a tenth aspect of the present invention, in addition to any one of the first to the ninth features described above, the conductive yarns are a pair of conductive yarns disposed in an insulated state from each other. And a point at which they are disposed in a predetermined straight or bent pattern on one surface of the first thermoplastic resin sheet.

  By arranging a pair of conductive yarns as a basic unit on the first thermoplastic resin sheet, the wiring for constituting the electric circuit between the measurement point and the wearable device can be easily realized in any desired pattern.

  In addition to the above-described tenth characteristic structure, in the eleventh characteristic structure, in addition to the tenth characteristic structure described above, a plurality of pairs of conductive yarns arranged parallel to each other at one end side It is disposed to branch off at the end side, and is electrically connected to the electrode material at the other end side.

  By connecting, for example, a connector to one end of a plurality of pairs of conductive yarns, it is possible to collectively connect a wearable device and a plurality of wires, which are a plurality of pairs of conductive yarns, in one place. By arranging the conductive yarn of the present invention to branch on the other end side, the tip end side can be electrically connected to the electrode material corresponding to the measurement point.

  According to a twelfth aspect of the present invention, as recited in claim 12, in addition to any of the first to eleventh features described above, a third thermoplastic resin sheet to be fused to a fabric The first thermoplastic resin sheet is fusion-bonded with the conductive yarn interposed therebetween.

  Since the conductive composite sheet is fused to the fabric through the third thermoplastic resin sheet, the conductive composite sheet is retained on the fabric with sufficient adhesion. The first thermoplastic resin sheet may be fused so as to sandwich the conductive yarn from above the third thermoplastic resin sheet fused in advance to the fabric, or the first thermal resin may be interposed so as to sandwich the conductive yarn in advance. The conductive composite sheet in which the third thermoplastic resin sheet is fused to the plastic resin sheet may be fused to the fabric.

  As described above, according to the present invention, it has become possible to provide a conductive composite sheet having sufficient stretchability and capable of securing a good touch when attached to a fabric.

FIG. 1 (a) is an explanatory view of a conductive composite sheet according to the present invention, and is a cross-sectional view schematically showing that the second thermoplastic resin sheet 2 is stretch-stitched, and FIG. 1 (b) is a conductive FIG. 1 (c) is a cross-sectional view of the second thermoplastic resin sheet in which the yarn is sewn, FIG. 1 (c) is a cross-sectional view of a state of being mounted on clothes, FIG. It is explanatory drawing of the state by which the plastic resin sheet was partially cut. Fig.2 (a) is explanatory drawing by the photographic image of the surface of the 2nd thermoplastic resin sheet by which flat stitching which is an example of expansion-contraction sewing was carried out, FIG.2 (b) is explanatory drawing by the photographic image of the back. 3 (a) is an explanatory view of the conductive composite sheet, FIG. 3 (b) is an explanatory view of the conductive composite sheet attached to the compression pants, and FIG. 3 (c) is a conductive composite sheet covered with a waterproof fabric. FIG. FIG. 4 is an explanatory view of overlock stitching, flat stitching, chain stitching, or zigzag stitching which is an example of telescopic stitching. Fig.5 (a) is sectional drawing which shows another embodiment of the electroconductive composite sheet by this invention, FIG.5 (b) is a bottom view of the 1st thermoplastic resin sheet by which the electroconductive thread was distribute | arranged, FIG.5 (c). Is a cross-sectional view of a state of being worn on clothes. FIG. 6 (a) is an explanatory view based on a photographic image of the first thermoplastic resin sheet in which the conductive yarns are arranged, FIG. 6 (b) is an explanatory view showing the configuration of the conductive yarns, and FIG. It is explanatory drawing which shows the expansion-contraction direction. Fig.7 (a) is explanatory drawing of the planar view which shows another embodiment of the electroconductive composite sheet by this invention, FIG.7 (b) is explanatory drawing of the AA line cross section of Fig.7 (a). Fig.8 (a), FIG.8 (b), FIG.8 (c) is explanatory drawing which shows the manufacturing process of the electroconductive composite sheet shown to FIG. 7 (a) and FIG.7 (b). Fig.9 (a), FIG.9 (b), FIG.9 (c) is explanatory drawing which shows the manufacturing process of the electroconductive composite sheet shown to FIG. 7 (a) and FIG.7 (b). FIG. 10 is an explanatory view in plan view showing a modification of the conductive composite sheet shown in FIGS. 7 (a) and 7 (b). FIG. 11 is an explanatory view of a cross section taken along line A-A of FIG. 7A showing a modification of the conductive composite sheet shown in FIGS. 7A and 7B. 12 (a), 12 (b) and 12 (c) are explanatory views showing a manufacturing process of the conductive composite sheet shown in FIG. FIG. 13 is an explanatory view in plan view showing an example of wearing the conductive composite sheet shown in FIG. 7A and FIG. 7B on clothes. Fig.14 (a), (b), (c), (d) is explanatory drawing of the cross section which shows the modification of a conductive composite sheet.

Hereinafter, a conductive composite sheet according to the present invention will be described based on the drawings.
The conductive composite sheet is mounted on a fabric for wearable devices that measures biological information such as body temperature, heart rate, electrocardiogram, electromyogram, etc. For example, various sensors such as electrodes or temperature sensors disposed at measurement points on the body surface Functions as a wiring member that electrically connects the sensor and the wearable device.

  A stretchable knitted fabric or fabric is preferably used as the fabric. In the following description, clothes made of cloth are described as an example, but the conductive composite sheet is not limited to clothes, and any cloth that comes in contact with the body surface, such as hats, gloves, socks, headbands , Supporters, bandages, etc.

[First Aspect of Conductive Composite Sheet]
As shown in FIGS. 1 (a) and 1 (b), the conductive composite sheet 10 is desirably formed on one side of the first thermoplastic resin sheet 1 having stretchability and the first thermoplastic resin sheet 1. And a conductive yarn 5 arranged in the pattern of

  The conductive yarn 5 is made of a metal plated yarn in which a metal component is adhered to a core yarn, and the second thermoplastic resin sheet 2 sewn and stretched in a desired pattern using the conductive yarn 5 is a first thermoplastic resin. It is fused to the sheet 1.

  By forming the wiring pattern using the conductive yarn 5, it is possible to realize a desired curved shape or bent shape with a high degree of freedom. Then, even if bent, the conductive yarn 5 does not easily break, and the conductive composite sheet 10 is good and reliable without causing deterioration in the comfort even when worn on clothes. .

  Then, even if the conductive yarn 5 itself does not have stretchability, the wiring pattern is drawn by stretch stitching, so that stretchability appears as a united body with the first and second thermoplastic resin sheets 1 and 2 . Furthermore, since it is only necessary to stretch and sew in a predetermined pattern using a sewing machine, even in the case of high-mix low-volume production, it is possible to respond flexibly without increasing the equipment cost.

  Any of overlock stitching, flat stitching, chain stitching, and zigzag stitching can be adopted as telescopic stitching, and the range of choices of usable sewing machines can be expanded, and equipment cost can also be suppressed.

  FIGS. 1 (a) and 1 (b) show an example in which a two-needle flat stitch is adopted as a telescopic stitch. The upper and lower two conductive yarns 5 are sewn in parallel by two needles as front yarns, and the loop of the conductive yarn 5 is entangled with the decorative yarn 6 which becomes the back yarn.

  FIGS. 2 (a) and 2 (b) show photographic images of the front and back surfaces of the second thermoplastic resin sheet 2 which has been double-stitched and flat-stitched. The two white yarns visually recognized on the front surface are the conductive yarns 5, and the black yarn visually recognized on the back surface is the decorative yarn 6.

  FIG. 4 (a) shows the front and back appearance of a single needle over lock (ground stitch, 3 threads) as an example of over lock sewing, and FIG. 4 (b) shows a double needle over lock (4 threads). Front and back appearance of the yarn) is shown.

  Also, FIG. 4 (c) shows the front and back appearance of one-side decoration (ground stitching) as an example of flat stitching, and FIG. 4 (d) shows a single-needle double ring stitching (ground) as an example of chain stitching. The front and back appearance of the sewing is shown, and in FIG. 4 (e), the front and back appearance of the two-needle double ring sewing is shown as an example of the chain stitching, and in FIG. 4 (f), the front and back appearance of the zigzag stitching is shown. It is shown.

  Any sewing method may be adopted, and the number of needles is also arbitrary. For example, it is possible to adopt a flat seam, which is four-needle flat-stitching, and any other overlock stitching, flat-stitching, chain-stitching, using one needle, two needles, three needles, or four needles. Stitching can be adopted.

  As shown in FIGS. 1 and 2, the conductive yarn 5 has a predetermined linear shape or one linear surface on one surface of the first thermoplastic resin sheet 1 with the pair of conductive yarns 5 arranged in an insulated state as a basic unit. It is preferable to be arranged in a curved shape or a bent shape. By arranging the pair of conductive yarns 5 as the basic unit on the first thermoplastic resin sheet 1, it is possible to easily realize the wiring that constitutes the electric circuit for signal transmission or feeding between the measurement point and the wearable device. Become.

  As shown in FIG. 3A, the conductive composite sheet 10 is disposed such that a plurality of pairs of conductive yarns 5 arranged in parallel to each other on one end side 11 branch on the other end side 12 for each basic unit, It is preferable that the other end 12 be electrically connected to the electrode members 13 and 14.

  By connecting, for example, a connector to one end side 11 of the plurality of pairs of conductive yarns 5, it is possible to collectively connect the wearable device and the wires as the plurality of pairs of conductive yarns 5 at one place. Further, by arranging a plurality of pairs of conductive yarns 5 to branch on the other end 12 toward various measurement points, the electrode members 13 and 14 corresponding to various measurement points on the other end 12 are electrically connected Will be able to connect.

  The conductive composite sheet 10 shown in FIG. 3A stretches and stitches the conductive yarn 5 in a desired pattern on a rectangular second thermoplastic resin sheet 2 of a predetermined size, and the second thermoplastic resin sheet After heat-fusing 2 to the first thermoplastic resin sheet 1, it is possible to electrically connect the electrode members 13 and 14 to the tip side of each conductive yarn 5 using a sheet-like hot melt adhesive or the like And then cut into the appropriate shape.

  As a hot melt adhesive, for example, polyurethane based hot melt resin, polyester based hot melt resin, polyamide based hot melt resin, EVA based hot melt resin, polyolefin based hot melt resin, styrene based elastomer resin, moisture curing type urethane based hot melt Resin, reaction type hot melt resin, etc. are mentioned.

  As shown in FIG. 1 (c), the conductive composite sheet 10 thus obtained is formed on the third thermoplastic resin sheet 3 fused in advance to the cloth 20 of the garment. The first thermoplastic resin sheet 1 is fusion-bonded so as to sandwich the conductive yarn 5 of the present invention, and the first thermoplastic resin sheet 1 is attached to the cloth 20 of the clothes.

  Since the conductive composite sheet 10 is fused to the cloth 20 of the garment via the third thermoplastic resin sheet 3, the conductive composite sheet 10 is held on the garment with sufficient adhesion. The conductive composite sheet 10 in which the third thermoplastic resin sheet 3 is fused to the first thermoplastic resin sheet 1 may be heat fused to the cloth 20 of the clothes so as to sandwich the conductive yarn 5 in advance. .

  Furthermore, after disposing the third thermoplastic resin sheet 3 between the cloth 20 of the clothes and the conductive composite sheet 10, the space between the cloth 20 and the conductive composite sheet 10 is pressed and heated to form the third heat. The plastic resin sheet 3 may be melted to fuse and fix both the body cloth 20 and the conductive composite sheet 10.

  As shown in FIG. 1 (d), the conductive composite sheet 10 in which the pair of conductive yarns 5 are arranged is separated and cut at one end portion at the central portion of the pair of conductive yarns 5. It is also possible to position and heat-seal the end portion in an appropriate position with respect to the body 20. In FIG. 1 (d), reference numeral 9 indicates a cutting point.

[First aspect of a garment incorporating a conductive composite sheet]
FIG. 3B shows a state in which the above-described conductive composite sheet 10 is heat-sealed on the skin surface side of a compression-type pants 30 that supports motor functions by supporting muscles. Such garments may be, for example, natural silk knitting (flat knitting) mixed with polyurethane yarn, rib knitting (rubber knitting, milling knitting), pearl knitting, denby knitting (tricot knitting), atlas knitting, cord knitting, or their change structures It can be composed of a knitted fabric or the like.

  One end side 11 of the conductive yarn 5 disposed on the conductive composite sheet 10 is taken out to the surface side through a slit (not shown) formed in the body fabric 20, and a connector CN for connecting a wearable device It is connected to (shown by broken lines in FIGS. 3 (b) and 3 (c)).

  The wear to which the conductive composite sheet 10 is attached is not limited to the compression type pants, and may be a compression type upper body wear or a wear type wear other than the compression type. It can be applied to underwear used for various sports and fitness.

  FIG. 3 (c) shows a coating material 40 covering the conductive yarn 5 with a water repellent cloth or a waterproof cloth so that the conductive yarns 5 do not short-circuit due to sweating of the wearer (FIG. 3 (c), The hatched area) shows a state of being stuck with the hot melt adhesive.

  It is not necessary to use a dedicated water repellent fabric or waterproof fabric as the covering site 40, and a fabric made of the same material as the body fabric and treated to be water repellent or waterproof can also be used. Wearing feeling can also be further improved by sticking such a covering 40.

[Constructive material of conductive composite sheet]
A polyurethane sheet having a melting point of 90 to 220 ° C. and a thickness of 30 to 200 μm is suitably used as the thermoplastic resin sheets 1, 2 and 3 having stretchability. The thermoplastic resin sheets 1, 2 and 3 may be composites of two or more layers of thermoplastic resin sheets. It is also possible to make the melting point of each layer different. For example, it is preferable to make the melting point of the layer closer to the cloth to be mounted lower. This is preferable in that high waterproofness can be realized and, at the same time, high adhesive strength with the fabric can be expressed.

  As the thermoplastic resin sheets 1, 2 and 3, thermoplastic elastomers such as polyester elastomers, polyamide elastomers, and polyolefin elastomers can be used in addition to polyurethane sheets.

  The conductive component 5 is coated with a metal component by performing wet or dry coating, plating, vacuum deposition, or other appropriate deposition method on the core using resin fiber, natural fiber, metal wire or the like as the core. It is preferred to use a metallized wire (plated wire). Although a monofilament may be adopted for the core, a multifilament or a spun yarn is preferred to a monofilament.

  Examples of metal components to be deposited on the core include pure metals such as aluminum, nickel, copper, titanium, magnesium, tin, iron, silver, gold, platinum, vanadium, molybdenum, tungsten, cobalt, alloys thereof, stainless steel , Brass etc. can be used. In the present embodiment, a silver plated silver multifilament made of nylon or polyester is used.

  By using a twisted yarn in which a plurality of plated wires are twisted, it is possible to prevent slippage and tucking like puckering since the slippage is improved without breaking easily even when using a sewing machine. In particular, a three-filament yarn can be preferably used as such a fuel yarn.

  Furthermore, by using the conductive yarn 5 coated with a low melting point polyurethane having a melting point of 90 to 150 ° C., it is possible to secure insulation in a state of being sewn to the second thermoplastic resin sheet 2 Also, it is possible to heat-fuse the clothes without interposing the third thermoplastic resin sheet 3. As an embodiment of coating the conductive yarn 5 with polyurethane, an embodiment of covering the conductive yarn 5 with a polyurethane yarn and an embodiment of coating the conductive yarn 5 with a polyurethane resin are included.

  The fineness of the conductive yarn is preferably 33 dtex to 400 dtex. In particular, 70 dtex to 300 dtex is preferable.

  Although an example using a metal plated yarn in which a metal component is adhered to a core yarn as the conductive yarn 5 has been described, for example, natural fibers or synthetic fibers such as Sylvern ZAG (registered trademark) manufactured by Nippon Shin Material Co., Ltd. It is also possible to use a silver ion yarn to which silver ions are attached. In the present specification, these are collectively referred to as metal-coated yarns.

  The electrode members 13 and 14 can be made of a fabric knitted or woven using the conductive yarn 5, and like the elastic conductive yarn described later, the core yarn is an elastic yarn such as polyurethane. The conductive yarn 5 is preferably wound in that it is wound around a core yarn and knitted or woven using a covering yarn so that the conductive composite sheet 10 or the body fabric constituting the garment can be expanded and contracted along with expansion and contraction of the fabric.

  In addition, the structure of the electrode materials 13 and 14 is not specifically limited, It can not be overemphasized that the material for well-known electrodes can be used suitably. The conductive yarn 5 itself may function as the electrode members 13 and 14.

  A desired electromyogram can be obtained by arranging the pair of electrode members 13 and 14 at a portion corresponding to the measurement point of the muscle of the wearer of the clothes. Further, by disposing a temperature sensing element such as a thermocouple or a thermistor between a pair of electrode members 13 and 14 or one of the electrodes, it is possible to measure a change in body temperature of the wearer.

[Second aspect of conductive composite sheet]
Furthermore, you may comprise the electroconductive composite sheet 10 using the 2nd thermoplastic resin sheet 2 mentioned above.

  For example, after the non-stretchable yarn is attached to the stretchable conductive yarn 5 and the second thermoplastic resin sheet 2 is subjected to a sewing process of a desired pattern using a sewing machine, the non-stretchable yarn is broken by pulling or A desired pattern using the stretchable conductive yarn 5 can be disposed on the second thermoplastic resin sheet 2 by melting and cutting it by heat treatment.

  In this case, the sewing process means a non-stretch stitch like a lock stitch, and the tension of the stretchable conductive thread 5 is not sufficient, so that sewing with only the stretchable conductive thread 5 is difficult. Also, by attaching the non-stretchable yarn to the stretchable conductive yarn 5, stable sewing can be performed while securing tension to endure sewing.

  As the non-stretchable yarn, a low melting point heat fusible fiber yarn selected from polyamide fiber yarn, polyester fiber yarn or polyolefin fiber yarn is suitably used. It is preferable that a plurality of filament yarns having a single fiber fineness of 5 dtex to 110 dtex be twisted and that a non-stretchable yarn having a melting point in the range of 50 ° C. to 90 ° C. be used.

  It is also possible to remove from the second thermoplastic resin sheet 2 the non-stretchable yarn which is heat-treated and melted and cut after the sewing process is completed, and even in this manner, the second thermoplastic resin sheet 2 is stretched and contracted. A conductive composite sheet 10 in which the conductive conductive yarns 5 are arranged in a desired pattern can be realized. The melted non-stretchable yarn may be left as it is on the second thermoplastic resin sheet 2.

  It is needless to say that it is possible to adopt other yarn types such as cotton yarn which is not easily fused by heating instead of the above-mentioned low melting point heat fusible fiber yarn as the non-stretchable yarn. .

  When the tension of the stretchable conductive yarn 5 is sufficient and sewing with only the stretchable conductive yarn 5 can be easily performed, the non-stretchable sewing may be performed without attaching the non-stretchable yarn. For example, a desired pattern can be arranged by using the non-stretchable yarn for the upper yarn and the stretchable conductive yarn for the lower yarn, and stitching the second thermoplastic resin sheet 2 to a desired pattern. It is also possible to arrange a desired pattern by using the stretchable conductive thread and using the non-stretchable thread for the lower thread to lock the second thermoplastic resin sheet 2. In any case, the present invention is not limited to the non-stretching sewing, and may be stretching and sewing.

  That is, a non-stretchable stitch or stretch stitched in a desired pattern by attaching a non-stretch yarn to the conductive yarn, or by using a non-stretch yarn for at least one of the upper yarn and the lower yarn while using the conductive yarn The thermoplastic resin sheet of No. 2 may be combined and integrated with the first thermoplastic resin sheet.

[Third Aspect of Conductive Composite Sheet]
Another embodiment of the conductive composite sheet 10 is shown in FIGS. 5 (a) and 5 (b). In the conductive composite sheet 10, the conductive yarns 5 are arranged in a desired shape on one main surface of the first thermoplastic resin sheet 1 without using the second thermoplastic resin sheet 2 of the embodiment described above. FIG. 5 (b) shows that the surface on which the conductive yarn 5 is disposed is viewed from below, as it is heat-sealed (see FIG. 5 (a)).

  Also in the case where such a conductive composite sheet 10 is attached to clothes, as in FIG. 1 (c), a conductive composite sheet is formed on the third thermoplastic resin sheet 3 fused in advance to the cloth 20 of the clothes. It is attached by fusing the first thermoplastic resin sheet 1 so as to sandwich the 10 conductive yarns 5.

  The photographic image image | photographed from the back surface of the 1st thermoplastic resin sheet 1 by which the electroconductive thread 5 which shows elasticity is distribute | arranged is shown by Fig.6 (a).

  As shown in FIGS. 6 (b) and 6 (c), the conductive yarn 5 is composed of a covering yarn in which the above-mentioned metal-coated yarn 5b is wound around an elastic core yarn 5a such as polyurethane. It is configured to expand and contract in the longitudinal direction of the core yarn 5a.

  It is possible to adopt any of SCY and DCY as the covering yarn, but it is preferable to adopt DCY in terms of good stretch characteristics and stability of the electrical resistance value at the time of stretch. In particular, the winding direction of the lower winding yarn and the upper winding yarn is opposite (for example, when the lower winding is S winding, the upper winding is Z winding, or when the lower winding is Z winding, the upper winding is S) winding DCY is preferred.

  If the conductive yarn 5 is disposed in a desired pattern on one side of the first thermoplastic resin sheet 1 and fused, the conductive yarn 5 itself expands and contracts along with the expansion and contraction of the first thermoplastic resin sheet 1 It will be. It is also possible to coat such a stretchable conductive yarn 5 with a low melting point polyurethane as described above. Similar to the above, as a mode of coating the conductive yarn 5 with polyurethane, a mode of covering the conductive yarn 5 with a polyurethane yarn and a mode of coating the conductive yarn 5 with a polyurethane resin are included.

  In FIG. 7A, a spiral electrode portion 51 and a linear wiring portion 52 are constituted by one conductive yarn 5 arranged on one main surface of the first thermoplastic resin sheet 1, A conductive composite sheet 10 is illustrated which is configured to function as a sensor sheet with biological electrodes for acquiring electrical signals.

  A portion of the conductive yarn 5 forming the electrode portion 51 is exposed on one principal surface side of the first thermoplastic resin sheet 1 so as to contact the skin surface of the human body in order to obtain a desired bioelectric signal. The above-described coated material 40 is attached to a portion corresponding to the wiring portion 52 using a hot melt adhesive or the like.

  As shown in FIG. 7B, a part of the outer surface of the conductive yarn 5 constituting the electrode portion 51 and the wiring portion 52 is buried and fixed in the first thermoplastic resin sheet 1. In the present embodiment, the first thermoplastic resin sheet 1 is fixed so as to be partially embedded in the entire area of the conductive yarn 5 in the longitudinal direction.

  The conductive yarn 5 having stretchability preferably has a fineness of 33 dtex to 1000 dtex. In particular, 70 dtex to 650 dtex is preferable. When the conductive yarn 5 is formed as a covering yarn in which a metal-coated yarn is wound around the core yarn 5a, the fineness of the core yarn 5a is preferably 310 dtex to 1880 dtex, and more preferably 620 dtex to 1240 dtex.

  When constructed as covering yarns, it is preferred that the core yarn be wound in a stretched (drafted) state. The fineness of the metal-coated yarn wound around the core yarn is preferably 33 dtex to 200 dtex, and more preferably 44 dtex to 90 dtex.

  Also, the conductive yarn 5 coated in advance with an insulating resin material can be used as the conductive yarn 5 corresponding to the wiring portion 52. If such a conductive yarn 5 is used, it is not necessary to provide the above-mentioned covered ground 40.

  As such an insulating resin material, for example, polyurethane, polyvinyl chloride, polypropylene, polyethylene, nylon (such as nylon 6 or nylon 66, etc., which is a long continuous chain synthetic polymer spun by an amide bond) Generic name of synthetic fiber based polyamide), polyester, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyetheretherketone, PFA, PVDF, fluorine resin such as ETFE, polystyrene, polycarbonate, polysulfone, polyether sulfone , Formal (polyvinyl formal), butyral (polyvinyl butyral) and the like. In addition, the material which can be used as an insulation coating layer is not limited to these resin types.

A method of manufacturing such a conductive composite sheet 10 will be described.
As shown in FIG. 8 (a), a mold 7 having a slit 71 of a desired pattern in which conductive threads are arranged on a thin metal plate such as stainless steel is prepared, and as shown in FIG. 8 (b) A pressure-sensitive adhesive sheet 72 having a pressure-sensitive adhesive surface formed on one surface is attached so as to cover the slits 71 formed in the above.

  Subsequently, as shown in FIG. 8C, the inside of the slit 71 is formed along the slit 71 formed in the mold 7 with the surface opposite to the surface to which the adhesive tape 72 is attached facing up. The conductive yarn 5 is disposed. Since the conductive yarn 5 is held by the adhesive surface of the adhesive tape 72, it is temporarily fixed without being displaced.

  Next, as shown in FIG. 9A, in the mold 7 in which the conductive yarn 5 is disposed in the slit 71, the surface on the opposite side to the adhesive surface of the adhesive tape 72 is a first thermoplastic resin sheet 1 and pressing the mold 7 and the conductive yarn 5 with the heating plate 100 heated from the upper side of the adhesive tape 72 to the melting temperature of the first thermoplastic resin sheet 1 or higher, as shown in FIG. Heat up.

  For example, when using a polyurethane sheet having a melting point of 90 to 150 ° C. as the first thermoplastic resin sheet 1, the mold 7 and the conductive yarn 5 may be pressed and heated by the heating plate 100 heated to about 170 ° C.

  By pressing and heating, a part of the outer surface of the conductive yarn 5 forming the electrode portion 51 and the wiring portion 52 is embedded in the first thermoplastic resin sheet 1 and thermally fused and fixed. After completion of the pressure heating, the adhesive tape 72 and the mold 7 are removed to complete the conductive composite sheet 10 as shown in FIG. 9C.

  FIG. 10 shows another aspect of the conductive composite sheet 10 which functions as a sensor sheet. The reinforcing sheet members 5 a and 5 b are provided to partially cover the conductive yarn 50 constituting the electrode portion 51 and to be fixed to the first thermoplastic resin sheet 1. The reinforcing sheet member 5a covers the tip of the conductive yarn 50 constituting the electrode portion 51, and the reinforcing sheet member 5b collectively covers a plurality of portions of the electrode portion 51 having a spiral linear structure.

  As the reinforcing sheet members 5a and 5b, the same material as the covering 40 covering the wiring portion 52 described in FIG. 7A can be used. In order to fix the reinforcing sheet member to the first thermoplastic resin sheet 1, the above-mentioned hot melt adhesive or the like can be used. It is also possible to use a sheet-like resin material similar to the first thermoplastic resin sheet 1.

  By providing such reinforcing sheet members 5a and 5b, the adhesion between the electrode portion 51 and the first thermoplastic resin sheet 1 can be further enhanced, and the conductive yarn 50 constituting the electrode portion 51 can Peeling or falling off from the thermoplastic resin sheet 1 can be effectively prevented.

  The place to which the reinforcing sheet members 5a and 5b are attached is not particularly limited, but it is preferable that the reinforcing sheet members 5a and 5b be provided so as to cover at least the tip of the conductive yarn 50 constituting the electrode portion 51. Due to the structure of the electrode portion 51, the front end portion is a portion which is easily peeled off from the first thermoplastic resin sheet 1, and by providing the reinforcing sheet member at the front end portion of the conductive yarn 50, the durability of the electrode portion 51 is further enhanced. It is possible to further improve.

  In the example described in FIG. 7B, the degree of embedding of the outer surface of the conductive yarn 5 with respect to the first thermoplastic resin sheet 1 is substantially constant, but the degree of embedding does not have to be uniform; The depth may be different, or a part may not be buried.

  As shown in FIG. 11, the part 5A of the conductive yarn 5 may be configured to be buried in the first thermoplastic resin sheet 1 more than the other part 5B. In addition, FIG. 11 is the sectional view on the AA line which shows the one aspect | mode of the electroconductive composite sheet 10 of Fig.7 (a).

  By partially providing a portion in which the amount of immersion to the first thermoplastic resin sheet 1 is large, it is possible to increase the adhesion strength of the conductive yarn 5 to the first thermoplastic resin sheet 1. In addition, when functioning as the electrode unit 51, it is possible to prevent a large reduction in the contact area with the skin surface of the wearer, as compared with the case where the total amount of burial is increased.

  In order to enable adjustment of the amount of burial, for example, when heat fusing is performed while burying a part of the outer surface of the conductive yarn 5 on one main surface of the first thermoplastic resin sheet 1 by press heating, It may be pressed strongly to partially increase the amount of burial.

An example of a method of manufacturing such a conductive composite sheet 10 will be described in detail.
As shown to Fig.12 (a), the formwork 7 which formed the slit 71 of the desired pattern which arrange | positions an electroconductive thread in metal thin plates, such as stainless steel, is prepared. The slit 71 is provided with the uncut portion 73 so as to be partially discontinuous.

  As shown in FIG. 12 (b), an adhesive sheet 72 having an adhesive surface formed on one surface is attached to cover the slits 71 formed in the mold 7, and the surface to which the adhesive tape 72 is attached The conductive thread 5 is disposed inside the slit 71 along the slit 71 formed in the mold 7 with the opposite surface up. Since the conductive yarn 5 is held by the adhesive surface of the adhesive tape 72 inside the slit 71 except for the uncut portion 73, it is temporarily fixed without being displaced.

  Next, as shown in FIG. 12C, in the mold 7 in which the conductive yarn 5 is disposed in the slit 71, the surface on the opposite side to the adhesive surface of the adhesive tape 72 is a first thermoplastic resin sheet The mold 7 and the conductive yarn 5 are pressed and heated by the heating plate 100 heated from the upper side of the adhesive tape 72 to the melting temperature of the first thermoplastic resin sheet 1 or more.

  As a result of the conductive yarn 5 being directly pressed by the uncut portion 73 of the mold 7 when pressing and heating with the heating plate 100, the conductive yarn portion located at the uncut portion 73 is not positioned at the uncut portion 73 The amount of immersion in the first thermoplastic resin sheet 1 is larger than in the other conductive yarn portions.

  Even when there is a possibility that the bending strength of the mold 7 may decrease due to the formation of the slits 71, the reduction of the bending strength is suppressed by the uncut portion 73 provided in the mold 7. Therefore, the occurrence of damage such as bending of the mold 7 can be avoided to improve the workability at the time of manufacturing the sensor sheet 1.

[A second embodiment of a garment incorporating a conductive composite sheet]
FIG. 13 exemplifies a T-shirt 100 which is an example of a garment using the above-described conductive composite sheet 10 as a sensor sheet. A pair of conductive composite sheets 10 are disposed on the left and right sides of the chest of the T-shirt 100 so as to be capable of detecting an electrocardiogram.

  The conductive composite sheet 10 is fused and fixed to the skin side of the T-shirt 100 so that the pair of left and right electrode parts 51 contact the left and right chests of the wearer, and the metal functions as a terminal on the surface side of the T-shirt 100 A male or female snap button 53 is disposed and crimped and fixed so as to be electrically connected to the wiring portion 52.

  Measurement of an electrocardiogram is possible by connecting a signal line with a female or male snap button engageable with the snap button 53 fixed to the tip to a biological information measuring device such as an electrocardiograph as an external device become.

[Fourth Aspect of Conductive Composite Sheet]
In the conductive composite sheet 10 shown in FIGS. 7 (a) and 7 (b) to FIGS. 9 (a), 9 (b) and 9 (c), an example in which the first thermoplastic resin sheet 1 is composed of a single layer is shown. Although it demonstrated, the 1st thermoplastic resin sheet 10 may be comprised by the laminated body of the several thermoplastic resin layer in which melting | fusing point differs.

  Of the first thermoplastic resin sheet 1 formed of a laminate of thermoplastic resin layers having different melting points, the low melting point thermoplastic resin layer functions as a fusion layer, and the high melting point thermoplastic resin layer is It will function as a shape-retaining layer which maintains the arrangement state of the conductive yarn 5 stably.

  14 (a) to 14 (d) show various embodiments in which the first thermoplastic resin sheet 1 is formed of a laminate of a plurality of thermoplastic resin layers having different melting points. The cross-sectional structure shown in FIGS. 14 (a) to 14 (d) is similar to that shown in FIG. 7 (b), but the spirally arranged electrode portions 51 shown in FIG. 7 (b). The cross-sectional structure of the four long conductive yarns 5 arranged in parallel to one another is not shown, but has a function as a wiring member used for signal transmission and the like.

  In FIG. 14 (a), the first thermoplastic resin sheet 1 is formed of a laminate of two thermoplastic resin layers 1a and 1b having different melting points, and the conductive yarn 5 is formed on the low melting point thermoplastic resin layer 1a. An example is shown in which the is placed and combined and integrated.

  The first thermoplastic resin sheet 1 is heat-fused to the cloth 20 of the clothes via the third thermoplastic resin sheet 3. The third thermoplastic resin sheet 3 is also formed of a laminate of two thermoplastic resin layers 3a and 3b having different melting points, and the high melting point thermoplastic resin layer 3a is the low melting point of the first thermoplastic resin sheet 1 The low melting point thermoplastic resin layer 3b is disposed opposite to the body fabric 20 side and thermally fused to the body material 20 side. In order to avoid confusion with the “second” thermoplastic resin sheet 2 described in FIG. 1 (a), the “third” thermoplastic resin sheet 3 is not shown as a “second”. ing.

  In the present embodiment, the first and third thermoplastic resin sheets 1 and 3 are each composed of a polyurethane resin sheet having a thickness of 30 to 200 μm, and a polyurethane having a melting point of 150 to 220 ° C. as a polyurethane resin layer on the high melting side. A resin is used, and a polyurethane resin having a melting point of 90 to 150 ° C. is used as the polyurethane resin layer on the low melting side. The same applies to a thermoplastic resin sheet composed of a laminate of thermoplastic resin layers described below.

  In FIG. 14 (b), the first thermoplastic resin sheet 1 is composed of a laminate in which low melting point thermoplastic resin layers 1a and 1c are disposed on both sides of the high melting point thermoplastic resin layer 1b. There is. The conductive yarns 5 arranged in a desired pattern are fused and compositely integrated on the surface of one low melting point thermoplastic resin layer 1a with the high melting point thermoplastic resin layer 1b interposed therebetween, and the other low melting point thermal resin The plastic composite layer 1 c is heat-sealed to the body 20 which is a mounting portion for mounting the conductive composite sheet 10.

  That is, the function of the third thermoplastic resin sheet 3 which thermally fuses the conductive composite sheet 10 to the body 20 is substituted by the low melting point thermoplastic resin layer 1 c constituting the first thermoplastic resin sheet 1. As a result, the separate third thermoplastic resin sheet 3 becomes unnecessary.

  In the example of FIG. 14 (b), in order to protect the conductive composite sheet 10 heat-sealed to the cloth 20, the conductive yarn 4 composite integrated with the first thermoplastic resin sheet 1 is opposed to the conductive thread 4. A protective thermoplastic resin sheet 4 is further laminated. The thermoplastic resin sheet 4 is also composed of a laminate of two thermoplastic resin layers 4 a and 4 b having different melting points, and the low melting point thermoplastic resin layer 4 b is the low melting point side of the first thermoplastic resin sheet 1. The thermoplastic resin layer 4 b on the high melting point side functions as a protective layer of the conductive yarn 5 so as to be disposed opposite to the thermoplastic resin layer 1 a and thermally fused, so that the conductive yarn 5 is not abraded by contact with any object. Do.

  FIG. 14 (c) shows an example in which the protective thermoplastic resin sheet 4 of FIG. 14 (b) is formed of a single layer of the high melting point side thermoplastic resin layer. Further, in FIG. 14D, the protective thermoplastic resin sheet 4 is formed of a laminate of two thermoplastic resin layers 4a and 4b having different melting points, and the thermoplastic resin layer 4a on the high melting point side is A covering material 40 is disposed on the upper layer of the thermoplastic resin layer 1a of the first thermoplastic resin sheet 1 so as to be disposed opposite to the low melting point thermoplastic resin layer 1a and thermally fused and the low melting point thermoplastic resin layer 4b is further disposed thereon It is configured to wear.

  In any of the conductive composite sheets 10 shown in FIGS. 14 (a) to 14 (d), it is preferable that a release film be disposed on the thermally fused surface to the body cloth 20. This is to prevent the occurrence of dirt adhesion, damage and the like on the conductive composite sheet 10 due to environmental influences in various processes such as manufacturing and transportation up to the heat welding process to the body material 20.

  As mentioned above, although various embodiment of the electroconductive composite sheet 10 was described, it can not be overemphasized that it is also possible to comprise the electroconductive composite sheet 10 combining suitably each embodiment mentioned above.

  The electroconductive composite sheet 10 according to the present invention is widely used as a signal transmission wiring member to be attached to clothes for wearable devices that measure biological information such as body temperature, heart rate, electrocardiogram, electromyogram and the like.

10: conductive composite sheet 1: first thermoplastic resin sheet 2: second thermoplastic resin sheet 3: third thermoplastic resin sheet 5: conductive yarn 7: mold 71: slit 72: adhesive tape 73: Uncut portion 100: heating plate

Claims (12)

A conductive composite sheet attached to a fabric, wherein
A first thermoplastic resin sheet having elasticity;
A conductive yarn disposed in a desired pattern on one surface of the first thermoplastic resin sheet;
A conductive composite sheet comprising:   The conductive yarn is formed of a metal-coated yarn in which a metal component is adhered to a core yarn, and the second thermoplastic resin sheet that is sewn and stretched in the desired pattern using the conductive yarn is the first thermoplastic resin sheet. The conductive composite sheet according to claim 1, wherein the composite sheet is integrated with the resin sheet.   The conductive composite sheet according to claim 2, wherein any one of overlock stitching, flat stitching, chain stitching, and zigzag stitching is adopted as the stretchable stitching.   The conductive yarn is a covering yarn in which a metal-coated yarn is wound around a stretchable core yarn, and the conductive yarn is attached with a non-stretchable yarn, or at least one of the upper yarn and the lower yarn while using the conductive yarn. The second thermoplastic resin sheet non-stretch-stitched or stretch-stitched in the desired pattern is compositely integrated with the first thermoplastic resin sheet using a non-stretch yarn as described above. The electroconductive composite sheet as described.   The conductive composite sheet according to claim 1, wherein the conductive yarn is a covering yarn in which a metal-coated yarn is wound around a stretchable core yarn, and is compositely integrated with the first thermoplastic resin sheet.   The conductive composite sheet according to claim 5, wherein the first thermoplastic resin sheet is formed of a laminate of a plurality of thermoplastic resin layers having different melting points.   The electroconductive composite sheet according to claim 6, wherein the electroconductive yarn is compositely integrated with the thermoplastic resin layer on the low melting point side of the laminate.   The conductive composite according to claim 6 or 7, wherein the first thermoplastic resin sheet is formed of a laminate in which low melting point thermoplastic resin layers are disposed on both sides of a high melting point thermoplastic resin layer. Sheet.   The electroconductive composite sheet according to any one of claims 5 to 8, wherein a protective thermoplastic resin sheet is further laminated so as to face the conductive yarn compositely integrated with the first thermoplastic resin sheet.   10. The conductive yarn according to claim 1, wherein the conductive yarn is disposed in a predetermined straight or bent pattern on one surface of the first thermoplastic resin sheet, with a pair of conductive yarns disposed in an insulated state as a basic unit. The electroconductive composite sheet according to any one of the above.   A plurality of pairs of conductive yarns arranged parallel to each other on one end side are arranged to branch on the other end side for each basic unit, and are electrically connected to the electrode material on the other end side. The electroconductive composite sheet as described. The conductive composite sheet according to any one of claims 1 to 11, wherein the first thermoplastic resin sheet is fused to the third thermoplastic resin sheet fused to the fabric with the conductive yarn interposed therebetween. .

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