JP5282647B2 - fabric - Google Patents

Description

  The present invention relates to a fabric having a conductive wire.

As this type of fabric, the fabrics of Patent Document 1 and Patent Document 2 are known. For example, the woven fabric described in Patent Document 1 includes insulating fibers that constitute the main structure of the woven fabric, conductive wires that can be energized, and energization means that can supply power to the conductive wires.
The insulating fiber is a natural fiber such as cotton or a synthetic fiber such as polyester. The conductive wire has a nylon or polyester thread (core part) and a plating layer covering the core part.
Then, after weaving a woven fabric using a conductive wire material on a part of the warp or weft, a predetermined finishing process is performed, and the conductive wire material and the energizing means are electrically connected. As the finishing process, typically, heat treatment such as scouring and finishing set is applied to the fabric.
And the textile fabric of patent document 1 can be used as an electrode of an electrostatic capacitance type sensor, for example, can be used for the skin material of a vehicle seat.

Patent Document 2 discloses a fabric that can be used as a heater. This fabric is composed of conductive yarn (conductive wire) and non-conductive yarn (insulating fiber).
The conductive yarn is a conductive wire that can generate heat when energized, and is made of, for example, a metal, an alloy, a conductive plastic lead, or carbon fiber. And after weaving a woven fabric using a conductive wire for a part of the warp or weft, a predetermined finishing process is performed to obtain a woven fabric.

Japanese Patent Laid-Open No. 2000-219076 JP 2007-227384 A

By the way, in the known technique, the fabric is heated at the time of finishing or the like, but at this time, a part of the conductive wire may protrude from the surface of the fabric.
For this reason, in the known woven fabric, the conductive wire may be pulled out of the woven fabric or worn by the occupant's seating operation (the configuration easily deteriorates the seating property and reduces the performance). In particular, carbon fibers are vulnerable to shearing force and friction in the direction perpendicular to the fiber axis, and are easily broken by the occupant's seating motion.

Therefore, as a result of intensive studies by the present inventors, it has been found that the cause of the protrusion of the conductive wire is the shrinkage of the insulating fibers due to heat treatment. That is, the conductive wire is less contracted by heat (or non-shrinkable) than a typical insulating fiber. For this reason, when the woven fabric is heat-treated, the conductive wire cannot follow the contraction of the insulating fiber (a yarn length difference is generated between the conductive wire and the insulating fiber), and a part of the loose conductive wire protrudes from the surface of the woven fabric. .
The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to improve the durability of the fabric by suppressing the protrusion of the conductive wire from the fabric as much as possible.

  As means for solving the above-mentioned problems, the fabric of the first invention includes a conductive wire that can be energized and an energization means that can supply power to the conductive wire. A part of the woven fabric is made of a conductive wire having a dry heat shrinkage rate (described later) of 2% or less, and another part of the woven fabric different from the part is made of an insulating fiber. In the present invention, at least a part of the insulating fiber is an insulating fiber having a dry heat shrinkage rate of 5% or more. In this type of fabric, it is preferable to suppress the protrusion of the conductive wire from the fabric as much as possible from the viewpoint of durability and the like.

Therefore, in the present invention, the above-mentioned woven fabric is provided with a contraction portion that is more easily contracted than other fabric portions. Then, a part or all of the conductive wire is bent and deformed in the surface direction of the fabric by the contraction force of the contraction portion (for example, in a wavy or curved shape), thereby preventing or reducing the protrusion of the conductive wire from the fabric. It was set as the structure to do.
At the time of heat treatment of the fabric, the conductive wire is made to follow the contraction of the contraction portion so that the fabric can be further bent and deformed (without protruding from the fabric surface as much as possible).

Furthermore, the woven fabric of the first invention forms the restraint tissue portion and the yarn skipping tissue portion as the contraction portion with the above-described insulating fibers. The constrained structure part is a structure part where warps and wefts are densely crossed in the direction orthogonal to the arrangement direction of the conductive wire, and the yarn skipping structure part is a structure part where warps and wefts are loosely crossed in the same direction. is there.
In the present invention, by utilizing the difference in contraction force between the yarn skipping tissue portion and the restraining tissue portion, a part or all of the conductive wire material is suitably bent and deformed in the surface direction of the fabric.

A woven fabric according to a second invention is the woven fabric according to the first invention, wherein the conductive wire described above is disposed at a boundary portion between the yarn skipping tissue portion and the restraint tissue portion, and a part or all of the conductive wire material is made of the woven fabric. It was set as the structure which bends and deforms in a surface direction.
And in this invention, a conductive wire can be more flexibly deformed in the surface direction of a textile fabric by utilizing the contraction difference of the yarn skipping structure part and the restraint structure part to the maximum.

According to the first aspect of the present invention, it is possible to suppress the protrusion of the conductive wire as much as possible and improve the durability of the fabric. According to the first invention, the protrusion of the conductive wire can be suitably suppressed with a relatively simple configuration. According to the second aspect of the invention, the conductive wire can be more suitably bent and deformed in the surface direction of the fabric.

It is a perspective view of a vehicle seat. It is a partially transparent front view of a skin material back surface. It is an organization chart of textiles. It is an enlarged view of the textile surface. (A) is a longitudinal cross-sectional view of a part of the fabric before heating, and (b) is a longitudinal cross-sectional view of the part of the fabric after heating.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, a code | symbol may be attached | subjected only to one part conductive wire for convenience. Moreover, in each figure, a code | symbol may be attached | subjected only to a part of a skipping tissue part and a restraint tissue part. In FIG. 4, the complete structure of the woven fabric is surrounded by a solid line.
In each figure, reference numeral F is attached to the front of the vehicle seat, reference numeral B is attached to the rear of the vehicle seat, reference numeral L is attached to the side of the vehicle seat, reference sign UP is provided above the vehicle seat, and reference sign DW is provided below the vehicle seat. I will do it.

A vehicle seat 2 in FIG. 1 includes a seat cushion 4, a seat back 6, and a headrest 8. Each of these members has a cushion material (4P, 6P, 8P, not shown) that forms the outer shape of the seat, and a skin material (4S, 6S, 8S) that covers the cushion material.
And in this embodiment, the skin material 4S of the seating side of the seat cushion 4 is comprised with the textile fabric 10 (it mentions later in detail) provided with the electrically conductive wire 20. The fabric 10 functions as an electrode or heater of a capacitive sensor by electrically connecting the energizing means 18 to the conductive wire 20. At this time, the protrusion of the conductive wire 20 from the fabric 10 is suppressed as much as possible. It is desirable (see FIG. 2).
Therefore, in the present invention, the protrusion of the conductive wire 20 from the fabric 10 is suppressed as much as possible by the fabric configuration described later.

[fabric]
The fabric 10 of this embodiment is provided with the insulating fiber (warp yarn 21, weft yarn 22), the conductive wire 20, and the electricity supply means 18 with reference to FIG.2 and FIG.3. And in this embodiment, the restraint structure | tissue part T1 and the yarn skipping structure | tissue part T2 are formed in the fabric 10 by the insulating fiber (21, 22) which is the main structure of the fabric 10. FIG. Each configuration will be described below.

(Insulating fiber)
The insulating fibers (21, 22) are an insulating material which is the main component of the fabric 10, and typically have a specific resistance exceeding 10 ⁸ Ω · cm (see FIG. 3). In addition, the woven fabric 10 is composed of fibers in which at least part of the insulating fibers has a dry heat shrinkage rate (described later) of 5% or more.
Examples of this type of insulating fiber include plant-based and animal-based natural fibers, chemical fibers made of thermoplastic resins or thermosetting resins, and blended yarns or mixed yarns thereof. As the warp yarn 21 or the weft yarn 22 of the fabric 10, an insulating fiber wire (a wire material such as a spun yarn, a filament, a drawn yarn, or a stretched yarn (false twisted yarn or buckled yarn)) can be used.
And in natural fiber, since cotton, hemp, or wool is excellent in a texture, it is preferable to use it as a structure of the fabric 10. Among chemical fibers, polyester fibers (for example, polyethylene terephthalate filaments) and nylon fibers are preferably used as the fabric 10 because they are excellent in durability, texture and strength.

Here, at least a part of the insulating fiber which is the main component of the fabric 10 needs to have a dry heat shrinkage rate (described later) of 5% or more. For the texture, ground thickness, and stretchability of the fabric 10, it is preferable that the weight ratio (insulating fibers having a dry heat shrinkage rate of 5%) occupy 50% or more of all insulating fibers, and more preferably 80% or more.
The dry heat shrinkage rate is not particularly limited as long as it is 5% or more, but if the shrinkage rate of some of the insulating fibers is too high, the conductive wire (described later) may be loosened or dragged. The upper limit of the rate is preferably 50% or less. For the same reason, the upper limit of the dry heat shrinkage is more preferably 30% or less, and most preferably 20% or less.

(Dry heat shrinkage)
The dry heat shrinkage rate described above can be measured in accordance with “JIS L 1013 4.18.2 Dry heat shrinkage rate B method”.
In this measurement method, 8.82 mN × (display tex number) is used as the initial load, the wire is suspended in a dryer at 150 ° C., and 2.94 mN × (display tex number) is used as the load after removal. This is because when a wire is woven as a warp or weft on a loom, it is pulled with a strong tension, whereas in a woven fabric 10 that is finished as a product after a heat treatment such as a finishing set, the warp and the weft intersect each other. This is based on the fact that only a relatively weak tension is applied. That is, 8.82 mN × (display tex number) is used as the initial load as the tension on the loom, and 2.94 mN × (display tex number) is used as the tension in the fabric as the product. As a result, for example, a carbon fiber (an example of the conductive wire 20 described later) that is rigid and has a dry heat shrinkage rate of 0% cannot be shrunk in a woven fabric made of PET false twisted yarn. Projecting from the fabric surface.

(Conductive wire)
The conductive wire 20 is a conductive wire that can be energized, and typically has a specific resistance of 10 ⁰ to 10 ^-12 Ω · cm. By attaching the conductive wire 20 to the fabric 10, the fabric 10 itself can be used as an electrode or a heater of a capacitive sensor.
Examples of this type of conductive wire 20 include conductive yarns such as metals and alloys, carbon fiber filaments, and plated wires. Insulating fibers can also be twisted (covered) onto the conductive wire 20. Furthermore, a coating layer of insulating fibers can be formed on the conductive wire 20.
Here, the plated wire is a wire having a non-conductive or conductive wire (core portion) and a metal or alloy plating layer. Carbon fibers are polyacrylonitrile-based carbon fibers (PAN-based carbon fibers) and pitch-based carbon fibers. Among these, carbon fibers (carbonized fibers, graphitized fibers, graphite fibers) having a firing temperature of 1000 ° C. or higher have good electrical conductivity, and can be suitably used as the conductive wire 20 of the present embodiment.

The conductive wire 20 is a wire having a characteristic of a dry heat shrinkage rate of 2% or less. This is characteristic in carbon fibers and metal fibers, and alloy fibers also have the above characteristics except for shape memory alloys. Further, for example, a fiber electrolessly plated on PET is also heat-treated in the course of an etching process or the like, and thus tends to have a dry heat shrinkage of 2% or less.
Further, as described above, the conductive fibers 20 are interwoven in the fabric 10 that is at least partially composed of insulating fibers having a dry heat shrinkage rate of 5% or more, and the conductive wire 20 loosens on the fabric surface due to the shrinkage difference. As a result, it is pulled out during use of the fabric or is easily worn out. In the present embodiment, as will be described later, a shrinkage portion that is easier to shrink than other fabric portions is provided in the fabric. Then, a part or all of the conductive wire 20 is bent and deformed by the contraction force of the contraction part and arranged in the surface direction of the fabric 10.

[Production of woven fabric]
In this embodiment, with reference to FIG.3 and FIG.5, while comprising a part of fabric 10 with the conductive wire 20, the other part of the fabric 10 is comprised with an insulating fiber. At this time, the restraining tissue portion T1 and the yarn skipping tissue portion T2 are formed by the insulating fibers (21, 22).
In the present embodiment, an example in which a part of the weft 22 is configured by the conductive wire 20 will be described (details of the arrangement position of the conductive wire 20 will be described later). In this embodiment, the arrangement direction of the conductive wire 20 (conduction direction D1) is the arrangement direction of the wefts 22.
In the present embodiment, most of the warp 21 and the weft 22 are made of insulating fibers. In the woven fabric 10, the warp yarns 21 and the weft yarns 22 may regularly intersect, and the warp yarns 21 may jump over the weft yarns 22. Therefore, in the present embodiment, the number of wefts 22 over which the warp 21 jumps is referred to as “the number of warp jumps”.

(Restricted Organization Department)
The restraint structure portion T1 is a structure in which the warp yarn 21 and the weft yarn 22 are closely crossed in a direction orthogonal to the conductive direction D1 (orthogonal direction D2), and is a portion where the shrinkage allowance of the fabric 10 in the D2 direction is small. In this restraint structure part T1, the conductive wire 20 has formed the convex part visually on the fabric surface.
In the constrained tissue portion T1, the “number of warped yarns” is 1 to 3 in the orthogonal direction D2. Here, in order to effectively make the constrained tissue portion T1 have a convex shape, it is preferable to set the “number of warp jumps” to 1 to 2.

(Thread skipping tissue part (contraction part))
The yarn skipping tissue portion T2 is a portion where the shrinkage allowance of the woven fabric 10 is large, and the warp yarn 21 and the weft yarn 22 are loosely mixed in the orthogonal direction D2. In the yarn skipping tissue portion T2, the conductive wire 20 visually forms a concave portion on the fabric surface.
In the yarn skipping tissue portion T2, in the orthogonal direction D2, it is more preferable that the “number of warp jumps” is larger than that of the constraining tissue portion T1, for example, twice or more that of the constraining tissue portion T1. In the typical yarn skipping structure portion T2, the “number of warp skips” is 2 to 10 (for example, the number of warp skips is 7 at T2 in FIG. 3). Here, if the “number of warp jumps” is more than 10, the snag may be deteriorated or the abrasion resistance of the fabric 10 may be adversely affected.

And in this embodiment, the structure | tissue of the textile fabric 10 is formed in checkered pattern shape (refer FIG.3 and FIG.5). That is, the restraining tissue portions T1 and the yarn skipping tissue portions T2 are alternately formed in the orthogonal direction D2. Further, the constraining tissue portions T1 and the yarn skipping tissue portions T2 are alternately formed in the conductive direction D1. In FIG. 3, the constrained tissue portion T1 and the yarn skipping tissue portion T2 are separated by a broken line in the complete structure (portion surrounded by a solid line).
Here, the width dimension W2 (dimension in the orthogonal direction D2) of the yarn skipping tissue portion T2 and the width dimension W3 of the restraining tissue portion T1 are not particularly limited. In addition, in consideration of the design of the skin material 4S, when it is desired to give a concavo-convex feeling suitable for the fabric 10, it is preferable that the width dimensions (W2, W3) of both the tissue portions are 2 to 20 mm. In addition, any of the textured portions can be constituted by a single warp 21 (the length dimension in the conductive direction D1 of each textured portion is equal to or greater than the dimension of the warp 21).

(Disposition of conductive wire)
Then, the conductive wire 20 (weft) is driven for each of a plurality or a single insulating fiber (weft). At this time, the conductive wire 20 is disposed between the restraining tissue portion T1 and the yarn skipping tissue portion T2 (see FIGS. 3 and 5). More specifically, the conductive wire 20 is disposed between the weft thread (first weft thread 22a) passing through the center of the restraint structure portion T1 and the weft thread (second weft thread 22c) passing through the center of the yarn skipping structure section T2. Can do. By disposing the conductive wire 20 in this position, the conductive wire 20 is pulled toward the yarn skipping tissue portion T2 due to the shrinkage of the yarn skipping tissue portion T2.

More preferably, the above-described conductive wire 20 is disposed at the boundary between the yarn skipping tissue portion T2 and the restraining tissue portion T1.
Here, the boundary portion refers to the weft (intermediate weft 22b) constituting the portion where the yarn skipping tissue portion T2 and the restraining tissue portion T1 are in contact (the endmost portion of the yarn skipping tissue portion T2) and the two adjacent to the intermediate weft 22b. The weft. By disposing the conductive wire 20 at the boundary portion, the conductive wire 20 is suitably pulled toward the yarn skipping tissue portion T2 due to the shrinkage of the yarn skipping tissue portion T2.
It is most preferable to dispose the conductive wire 20 at the position of the intermediate weft 22b (the endmost portion of the yarn skipping tissue portion). In this way, the conductive wire 20 is most strongly pulled toward the yarn skipping tissue portion T2. As described above, the conductive wire 20 is arranged to bend and deform toward the surface direction of the fabric 10 due to a difference in contraction force between the restraining tissue portion T1 and the yarn skipping tissue portion T2.

Here, the number of conductive wires 20 in the fabric is not particularly limited, but when the fabric 10 is used as the skin material, it is preferable to arrange a plurality of conductive wires 20 in parallel (see FIG. 2). For example, when the fabric 10 is provided with a heater function, it is preferable to set the interval dimension (W1) between the conductive wire members 20 to 3 mm to 60 mm.
Moreover, when giving the electrode function to the textile fabric 10, it is desirable to set the space | interval dimension (W1) between the conductive wire materials 20 in the range of 60 mm. If the distance dimension (W1) exceeds 60 mm, the sensor function of the fabric 10 is deteriorated (capacitance is reduced) and may not function as an electrode. Preferably, the conductive fabric 10 has a more suitable sensor function (capacitance) by setting the upper limit value of the interval dimension (W1) of the conductive wire 20 to 30 mm.

(Textile finishing)
After weaving the fabric 10 as described above, a predetermined finishing process is performed. Examples of the finishing treatment include a scouring process, a dyeing process, a heat setting process, a texture-making process, a post-processing agent application process, and a finishing setting process. In the finishing process of the fabric 10, it is possible to perform all the above steps or to omit one or a plurality of steps.
In each of the above steps, the fabric 10 is often subjected to heat treatment. For example, heat treatment is often performed at around 100 ° C. for scouring and around 150 ° C. for finishing sets.

And the insulating fiber (21, 22) in the fabric 10 contracts by the finishing process (heating process) of the fabric 10 described above (see FIGS. 3 to 5). At this time, the yarn skipping tissue portion T2 (contracted portion) contracts more than the contraction of the insulating fibers of the constrained tissue portion T1.
The conductive wire 20 is pulled in the orthogonal direction D2 by the shrinkage difference during heating of the restraint tissue portion T1 and the yarn skipping tissue portion T2 (contraction portion). In this way, the conductive wire 20 is disposed so as to follow the contraction of the yarn skipping tissue part T2 (contracted part) and bend and deform appropriately in the plane direction of the fabric 10 (without protruding from the fabric surface). be able to.

In the fabric 10 of this embodiment, the yarn skipping tissue portion T2 and the restraining tissue portion T1 are alternately arranged (in a checkered pattern) in the conductive direction D1 and the orthogonal direction D2 (see FIGS. 3 and 4).
For this reason, the conductive wire 20 is stretched (staggered) so as to have a waveform by a plurality of yarn skipping tissue portions T2 arranged (in a checkered pattern) along the conductive direction D1 and arranged in the fabric 10. Become.

(Production of skin material)
The skin material 4S is typically composed of a plurality of skin pieces. In this embodiment, the fabric 10 is used for the skin piece that forms the seating side of the skin material 4S.
When the fabric 10 is used for the skin material 4S, the back surface of the fabric 10 is backed (after the resin layer is formed) in consideration of the post-process passability and the seating property, and then the pad material 14 and the back base A cloth 16 is preferably provided (see FIG. 2).
This type of pad material 14 is a porous member having flexibility. For example, a urethane pad having a high air content or a slab urethane foam made of a flexible urethane foam can be used. Moreover, the back base fabric 16 can be comprised, for example with a knitted fabric or a nonwoven fabric.

  Then, the fabric 10, the pad material 14, and the back base fabric 16 are laminated in this order and integrated by the joining means, and then cut into a predetermined shape (forms a skin piece). Examples of the joining means include methods such as laminating (welding), sewing, and adhesion.

[Energizing means]
The energizing means 18 is a member that electrically connects the conductive wire 20 and the power source 9, and can be exemplified by a conductive thread, a conductive tape, and a conductive cloth body (see FIG. 2).
By supplying electric power to the conductive wire 20 by the energizing means 18, the fabric 10 can function as an electrode or a heater of the sensor. For example, the fabric 10 can be used as a heater by connecting the current-carrying means 18 to both ends of the conductive wire 20 and energizing it. Moreover, the textile fabric 10 can be used as an electrode of a sensor by connecting the energizing means 18 to one side of the conductive wire 20.

For example, in this embodiment, the energization means 18 provided with the strip | belt-shaped cloth body 18a, a plating layer (illustration omitted), and the conducting wire 18b is used (refer FIG. 2).
The cloth body 18a has a strip shape that is long in the arrangement direction of the conductive wires 18b (for example, a strip shape that is long in the front-rear direction of the sheet), and can be composed of a cloth or a non-woven fabric. Further, the cloth 18a can be bonded to the conductive wire 20 in a wider area, and the contact resistance can be reduced.
The plated layer is a layer having a metal or alloy having electrical conductivity, and is provided on the cloth body 18a (a body to be plated). The plating layer may be formed on the entire cloth body 18a, or may be formed only on one surface of the cloth body 18a (the surface facing the conductive wire).
The conductive wire 18b can be exemplified by a conductive thread such as metal or alloy, or a plated wire. The conducting wire 18b may be arranged in a straight line on the cloth body 18a, but may be arranged in a wave shape by, for example, periodically swinging.

(Disposition of energizing means)
With reference to FIG. 2, the pad material 14, the back base fabric 16, and the resin layer are removed from both ends of the fabric 10 to expose both ends of the conductive wire 20. And after arrange | positioning a pair of electricity supply means 18 to the both ends of the some conductive wire 20, respectively, the electricity supply means 18 is sewn on the back surface of the textile fabric 10, and the both ends of the some conductive wire 20 are electrically connected in parallel. And the terminal of the power cable 9a is connected to a pair of electricity supply means 18, respectively, and the parallel circuit of the some conductive wire 20 is formed in the textile fabric 10. FIG.
In the present embodiment, by forming a parallel circuit of the plurality of conductive wires 20 by the pair of energization means 18, the plurality of conductive wires 20 can be energized (heated) with relatively low power consumption.

As described above, in the present embodiment, a part or all of the conductive wire 20 is bent and deformed in the surface direction of the fabric 10 by the contraction force of the yarn skipping tissue portion T2 (contraction portion) (for example, wavy or curved). (See FIG. 4). In the present embodiment, a part or all of the conductive wire 20 is suitably bent and deformed in the surface direction of the fabric 10 by using the difference in contraction force between the yarn skipping tissue portion T2 and the restraining tissue portion T1 during the heat treatment. We decided to arrange them.
For this reason, according to this embodiment, the protrusion of the conductive wire 20 can be suppressed as much as possible, and the durability of the fabric 10 can be improved.
And the textile fabric 10 of this embodiment has the outstanding durability, and can function as an electrode or a heater of an electrostatic capacitance type sensor. For this reason, the fabric 10 of this embodiment can be suitably used as the skin material 4S of the vehicle seat 2.

  Further, by forming the constrained tissue portion T1 and the yarn skipping tissue portion T2, a design unevenness can be expressed on the surface of the fabric 10. In particular, in the present embodiment, the conductive wire 20 having a low dry heat shrinkage rate is bent and deformed in the surface direction of the fabric 10, thereby reducing the feeling of tension due to the non-stretchability of the conductive wire 20, and the feel and expansion / contraction of the fabric 10. Can be improved. Furthermore, when an excessive force is applied to the fabric 10, disconnection of the conductive wire 20 can be suitably prevented or reduced.

Hereinafter, although this embodiment is described based on an example, the present invention is not limited to the example.
[Example 1]
As the conductive wire of Example 1, a carbon fiber core and a nylon 6 covering yarn (22 dtex-7 filament) were used. As the carbon fiber, “Torayca (registered trademark) T300-1K-50A” (specific resistance: 1.7 × 10 ⁻³ Ω · cm, dry heat shrinkage 0%) manufactured by Toray Industries, Inc. was used. The heating wire of Example 1 was obtained by setting the twist number of the covering yarn to 400 T / m and performing S-twisting single covering on the core.

In addition, as yarns constituting the woven fabric, polyester (PET) 1 heater false twisted yarn (100 dtex-288 filament, 180 T / m actual twist yarn, dry heat shrinkage 9.4%) warp yarn, PET1 heater false twisted yarn ( A first weft of 336 dtex-96 filament) and a second weft of PET2 heater false twisted yarn (336 dtex-96 filament, dry heat shrinkage 9.0%) were used.
Then, after warping the warp, the first weft, the second weft and the conductive wire were driven and woven with the woven structure shown in FIG. At this time, in FIG. 3, the first weft is arranged at the weft position indicated by reference numeral 22 ◯, the second weft is arranged at the weft position indicated by reference numeral 22bΔ, and the carbon fiber is arranged at the weft position indicated by reference numeral 22b ×. The density on the loom was weft / warp = 198/80 (books / 2.54 cm). Finally, a finishing set at 150 ° C. was performed on the fabric.

[Example 2]
As the conductive wire of Example 2, stainless fiber (“Naslon (registered trademark) TOW-12-100PV” manufactured by Nippon Seisen Co., Ltd., specific resistance: 72 μΩ · cm, dry heat shrinkage 0%) was used.
Further, the warp, the first weft, and the second weft of Example 1 were used as yarns constituting the woven fabric.
Then, after warping the warp, the first weft, the second weft, and the conductive wire were driven in to produce the woven fabric structure shown in FIG. At this time, in FIG. 3, the first weft was arranged at the weft position indicated by reference numeral 22o, the second weft was arranged at the weft position indicated by reference numeral 22bΔ, and the stainless fiber was arranged at the weft position indicated by reference numeral 22b ×. Finally, a finishing set at 150 ° C. was performed on the fabric.

[Comparative Example 1]
As the conductive wire of Comparative Example 1, the carbon fiber of Example 1 was used. Further, the warp, the first weft, and the second weft of Example 1 were used as yarns constituting the woven fabric.
Then, after warping the warp, the first weft, the second weft, and the conductive wire material were driven in to produce an 8 satin fabric. The position of each weft was the same as in Example 1. The density on the loom was weft / warp = 198/80 (books / 2.54 cm). Finally, a finishing set at 150 ° C. was performed on the fabric.

[Calculation method of absorbed yarn length difference]
The absorbed yarn length difference was determined by the following calculation formula. The fabric width is a dimension of the fabric in the arrangement direction of the conductive wire (conductive direction D1) (see FIG. 3).
“Absorbed yarn length difference” (%) = (“Conductive wire length” − “Finish width after finishing”) / (Conductive wire length) × 100

[Results and discussion]
In the woven fabric of Example 1, carbon fibers (conductive wires) were arranged in a straight line on the loom, but when removed from the loom, the carbon fibers were arranged in a wave shape. Also in the woven fabric of Example 2, the stainless steel fibers (conductive wires) were arranged in a straight line on the loom, but when removed from the loom, the stainless fibers were arranged in a wave shape.
In the woven fabrics of the respective examples, the conductive fibers were arranged in a wavy shape even after finishing setting, and the conductive wire material that was bent and deformed did not protrude from the fabric surface. At this time, according to the fabric of Example 1, a yarn length difference of 9.5% could be absorbed. Further, according to the fabric of Example 2, a yarn length difference of 9.5% could be absorbed. From this, it was found that the yarn length difference of about 10% can be absorbed by the fabric of this embodiment.
Summing up the above results, it has been found that according to this example, the protrusion (wear and breakage) of the conductive wire can be suppressed as much as possible, and the durability of the fabric can be improved. For this reason, it turned out that the textile fabric of each Example can be used conveniently as a skin material of a vehicle seat.

Unlike this, in the woven fabric of Comparative Example 1, the carbon fibers were arranged in a straight line on the loom, but when the carbon fibers were removed from the loom, the carbon fibers were bent and raised on the back of the woven fabric. In the woven fabric of the comparative example, a large number of conductive wire members protruded from the surface of the woven fabric after finishing set.
For this reason, it turned out that the textile fabric of a comparative example has low durability, and is unsuitable as a skin material of a vehicle seat.

The fabric of the present embodiment is not limited to the above-described embodiment, and can take various other embodiments.
(1) In the present embodiment, an example in which a part of the weft 22 is configured by the conductive wire 20 has been described. In contrast to this, a part of the warp can be formed of a conductive wire. In this form, the arrangement direction (conductive direction) of the conductive wire 20 is the arrangement direction of the warps 21 (see FIG. 3). And according to this conductive direction, the above-mentioned restraint structure part and the yarn skipping structure part are formed in the woven fabric.
If possible, a part of both the warp 21 and the weft 22 may be constituted by the conductive wire 20.

(2) In the present embodiment, the formation example of the restraint tissue part and the yarn skipping tissue part (checkered pattern-like formation example) is exemplified, but the shape, size, and number of formations of each tissue part are the arrangement of the conductive wires. It can be appropriately changed according to the number. In weaving such a fabric material, woven density, use yarn fineness, limited to the use loom has greens.

(3) Moreover, in this embodiment, the conductive wire 20 was arrange | positioned with respect to the textile fabric 10 by the waveform. Depending on the arrangement position and size of the contracted portion in the fabric, this conductive wire may be partially curved, or may be arranged on the fabric in a wave-like shape (zigzag or meandering). is there.
(4) Moreover, in this embodiment, the example which arrange | positions the some conductive wire 20 in parallel with respect to the textile fabric 10 in the sheet | seat width direction was demonstrated. The arrangement relationship of the plurality of conductive wires is not particularly limited, and may be arranged in parallel in the front-rear direction of the seat, for example. In this case, a pair of energizing means is arranged in front of and behind the seat.

(5) Moreover, in this embodiment, the example which uses the textile fabric 10 as the skin material 4S of the seating side of the seat cushion 4 was demonstrated. The fabric 10 of the present embodiment is used as a skin material (for example, 4S, 6S, 8S) of various configurations of the vehicle seat 2 such as a top plate main portion, a top plate side portion, a stile portion, a back portion, and a headrest 8 portion. Can be used. Moreover, it can be used as a skin material for various configurations of a vehicle such as a ceiling portion, a door portion, and a handle in addition to a vehicle seat.
In the present embodiment, the fabric 10 is used on the seating side of the skin material 4S. Unlike this, the woven fabric 10 may be used as the back base fabric 16.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 10 Fabric 14 Pad Material 16 Back Base Fabric 18 Conducting Means 20 Conductive Wire 21 Warp 22 Weft 22a First Weft 22b Intermediate Weft (Boundary)
22c 2nd weft T1 restraint structure part T2 yarn skipping structure part

Claims (2)

In a woven fabric provided with a conductive wire that can be energized and an energizing means capable of supplying power to the conductive wire, a part of the woven fabric is made of a conductive wire having a dry heat shrinkage rate of 2% or less, and the part The other part of the woven fabric different from the above is composed of insulating fibers, and at least a part of the insulating fibers are insulating fibers having a dry heat shrinkage rate of 5% or more,
The fabric, when provided with a constriction and easy shrinkage than other fabric sections, some or all of the conductive wire, the contraction force of the contraction portion, arranged so resiliently deformed in the direction of the face of the fabric ,
In the insulating fiber, a constrained structure portion where warps and wefts closely cross in a direction perpendicular to the arrangement direction of the conductive wire material, and a yarn flying structure as the contraction portion where warps and wefts cross loosely in the orthogonal direction Forming part,
A woven fabric configured to pull the conductive wire by the contraction force of the yarn skipping tissue part . The woven fabric according to claim 1, wherein the conductive wire is disposed at a boundary portion between the yarn skipping tissue portion and the restraint tissue portion .