WO2021201069A1 - Wiring sheet - Google Patents

Abstract

A wiring sheet (100) equipped with a pseudo-sheet structure (2) in which a plurality of conductive wire-like bodies (21) are arranged with intervals therebetween, and also equipped with a pair of electrodes (4), wherein: at least one end of the pseudo-sheet structure in the lengthwise direction of the conductive wire-like bodies when seen from a planar view of the pseudo-sheet structure (2) is equipped with a folded-back edge section; the pseudo-sheet structure before being folded back is provided with, in the following order from the end thereof, a first region (5), a fold-back region (6) which becomes the folded-back edge section, and a second region (7) which faces the first region (5) after the folding back occurs; and the pseudo-sheet structure (2) and one of the electrodes (4) are electrically connected to one another in the first region (5) and the second region (7).

Description

Wiring sheet

The present invention relates to a wiring sheet.

A sheet-like conductive member having a pseudo-sheet structure in which a plurality of conductive linear bodies are arranged at intervals is known. This sheet-shaped conductive member can be used as a member of various articles as a sheet-shaped heating element such as a textile material that generates heat by connecting electrodes.

For example, as a sheet-shaped heating element, Patent Document 1 describes a sheet-shaped heating element having a pseudo-sheet structure. The pseudo-seat structure is composed of a plurality of metal wires extending in one direction arranged at intervals. An adhesive layer is arranged on one side of the pseudo-sheet structure, and a pair of electrodes are electrically connected to the pseudo-sheet structure to form a sheet.

International release 2017/086395

In the sheet-shaped heating element described in Patent Document 1, the electrode and the conductive linear body are arranged so as to be in contact with each other at one place on the surface. Therefore, when a thin conductive linear body is used, the contact area between the electrode and the conductive linear body is small, so that there is a problem that the contact resistance between the electrode and the conductive linear body is increased.

An object of the present invention is to provide a wiring sheet in which the contact area between the conductive linear body and the electrode is expanded and the electrical resistance between the plurality of conductive linear bodies constituting the pseudo-sheet structure and the electrode is reduced. It is to be.

According to one aspect of the present invention, a pseudo-sheet structure in which a plurality of conductive linear bodies are arranged at intervals and a pair of electrodes are provided, and the conductive linear structure is provided in a plan view of the pseudo-sheet structure. At least one end of the pseudo-sheet structure in the length direction of the body has a folded edge portion, and the pseudo-sheet structure before folding has a first region, a folded region serving as the folded edge portion, and a folded edge portion in this order from the end. A wiring sheet that later comprises a second region facing the first region and is electrically connected to the pseudo-sheet structure and one of the electrodes in the first region and the second region. Provided.

In the wiring sheet according to one aspect of the present invention, both ends of the pseudo-sheet structure in the length direction of the conductive linear body have folded edges, and at the folded edges at both ends, the respective electrodes are described. It is preferable that the first region and the second region are electrically connected.

It is preferable that the wiring sheet according to one aspect of the present invention further includes a base material that supports the conductive linear body.

In the wiring sheet according to one aspect of the present invention, it is preferable that the base material is a flexible base material.

In the wiring sheet according to one aspect of the present invention, it is preferable that the flexible base material is a synthetic resin film, paper, non-woven fabric or cloth.

It is preferable that the wiring sheet according to one aspect of the present invention further includes a resin layer that supports the conductive linear body.

In the wiring sheet according to one aspect of the present invention, it is preferable that at least a part of the conductive linear body is embedded in the resin layer.

In the wiring sheet according to one aspect of the present invention, it is preferable that the electrode is a metal wire.

In the wiring sheet according to one aspect of the present invention, it is preferable that the conductive linear body in the first region and the conductive linear body in the second region are in direct or indirect contact with each other. ..

In the wiring sheet according to one aspect of the present invention, the gap between the folded edge portion and the electrode is preferably 50 mm or less in a plan view of the pseudo-sheet structure.

In the wiring sheet according to one aspect of the present invention, it is preferable that the conductive linear body has a wavy shape in a plan view of the pseudo-sheet structure.

It is preferable to use it as a heating element in the wiring sheet according to one aspect of the present invention.

According to the present invention, there is provided a wiring sheet in which the contact area between the conductive linear body and the electrode is expanded and the resistance between the plurality of conductive linear bodies and the electrodes constituting the pseudo sheet structure is reduced. be able to.

It is the schematic which shows the wiring sheet which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the main part of the cross section along the line II-II of FIG. It is sectional drawing which shows the cross section along the line III-III of FIG. It is the schematic for demonstrating the manufacturing method of the wiring sheet which concerns on 1st Embodiment of this invention. It is the schematic for demonstrating the manufacturing method of the wiring sheet which concerns on 1st Embodiment of this invention. It is the schematic for demonstrating the manufacturing method of the wiring sheet which concerns on 1st Embodiment of this invention. It is the schematic for demonstrating the manufacturing method of the wiring sheet which concerns on 1st Embodiment of this invention. It is the schematic for demonstrating the manufacturing method of the wiring sheet which concerns on 1st Embodiment of this invention. It is the schematic which shows the main part of the wiring sheet which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the cross section along the VI-VI line of FIG. It is the schematic which shows the main part of the wiring sheet which concerns on 3rd Embodiment of this invention. It is the schematic which shows the main part of the wiring sheet which concerns on other embodiment of this invention. It is sectional drawing which shows the main part of the cross section in the wiring sheet which concerns on other embodiment of this invention. It is sectional drawing which shows the main part of the cross section in the wiring sheet which concerns on other embodiment of this invention. It is sectional drawing which shows the main part of the cross section in the wiring sheet which concerns on other embodiment of this invention. It is sectional drawing which shows the main part of the cross section in the wiring sheet which concerns on other embodiment of this invention. It is sectional drawing which shows the main part of the cross section in the wiring sheet which concerns on other embodiment of this invention. It is a graph which shows the relationship of voltage | resistance of Example 1 and Comparative Example 1. It is a graph which shows the relationship of voltage | resistance of Example 2 and Comparative Example 2. It is a graph which shows the relationship of voltage | resistance of Example 3 and Comparative Example 3.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the contents of the embodiments. In addition, in the drawing, there is a part shown by being enlarged or reduced for easy explanation.

(Wiring sheet)
As shown in FIGS. 1 to 3, the wiring sheet 100 according to the first embodiment of the present invention includes a wide and long base material 1, a resin layer 3 arranged on the base material, and the resin layer. A pseudo-sheet structure 2 arranged on the pseudo-sheet structure 2 and electrodes 4 arranged at both ends of the pseudo-sheet structure 2 are provided. The pseudo-sheet structure 2 and each electrode 4 are electrically connected.
The pseudo-sheet structure 2 is composed of, for example, a metal wire having a circular cross section, and in a plan view, a plurality of conductive linear bodies 21 are arranged substantially in parallel at predetermined intervals. There is. Further, the electrode 4 is composed of a plurality of electrode wires 41, and in this embodiment, three electrode wires 41, and each electrode wire 41 is arranged in parallel in a direction perpendicular to the length direction of the conductive linear body 21. ing.
Both ends of the base material 1, the resin layer 3, and the pseudo-sheet structure 2 arranged on top of each other of the wiring sheet 100 are folded back toward the pseudo-sheet structure 2 to form a folded end edge 22.
In the folded end edge 22, the predetermined length portion from the end of the conductive linear body 21 in the length direction to the folded portion is designated as the first region 5, and the folded portion is designated as the folded region 6, and the folded portion is designated as the folded region 6. The portion facing the one region 5 is referred to as the second region 7.
Further, in the plan view of the pseudo-sheet structure 2, the electrode wire 41 on the folded-back edge portion 22 closest to the folded-back edge portion has a gap G formed from the conductive linear body 21 of the folded-back edge portion as shown in FIG. It is placed in place.
By forming the folded end edge 22, the first region 5 and the second region 7 of each conductive linear body 21 are brought into contact with the upper and lower edges of each electrode wire 41 constituting the electrode 4. It is electrically connected. In this way, the first region 5 and the second region 7 of the conductive linear body 21 come into contact with the upper and lower edges of each of the electrode wires 41 constituting the electrode 4 at two upper and lower positions, thereby forming the electrode 4. The contact area between each electrode wire 41 and the conductive linear body 21 is increased, and the electrical resistance between the electrode 4 and the pseudo-sheet structure 2 is reduced.

The above-mentioned gap G is preferably 50 mm or less. By setting the gap G to 50 mm or less, the material such as the base material 1 to be used can be reduced, the rigidity of the folded edge portion can be increased, and the shape can be stabilized.
The gap G is more preferably 30 mm or less, further preferably 10 mm or less.

The resin layer 3 indicates the pseudo-seat structure 2 by integrating the base material 1 and the pseudo-sheet structure 2 by adhesion, fixation, or the like.
The resin layer 3 that supports the conductive linear body 21 has a thickness t, and a part of the conductive linear body 21 having a diameter D is buried in the resin layer 3. Further, the electrode wire 41 in contact with the conductive linear body 21 has a diameter d.
From the viewpoint of adhesiveness, the thickness t of the resin layer 3 is preferably 3 μm or more and 150 μm or less, and more preferably 5 μm or more and 100 μm or less. The thickness t of the resin layer 3 may be appropriately determined depending on the use of the wiring sheet 100.
The diameter D of the conductive linear body 21 is preferably 5 μm or more and 75 μm or less. From the viewpoint of suppressing the increase in sheet resistance and improving the heat generation efficiency when the wiring sheet 100 is used as a heating element, the diameter D of the conductive linear body 21 is more preferably 8 μm or more and 60 μm or less, more preferably 12 μm. It is more preferably 40 μm or less.
The diameter d of the electrode wire 41 is preferably 10 μm or more and 300 μm or less, more preferably 20 μm or more and 200 μm or less, and particularly preferably 25 μm or more and 150 μm or less.

The diameter D of the conductive linear body 21 is the diameter D of the conductive linear body 21 at five randomly selected locations by observing the conductive linear body 21 of the pseudo-sheet structure 2 using a digital microscope. Is measured and used as the average value.

(Base material)
The base material 1 supports the conductive linear body 21 via the resin layer 3. The surface of the base material 1 may be smooth or uneven.

Examples of the material of the base material 1 include wood, paper (pulp), leather, thermoplastic resin, thermosetting resin, other resins, and modified resins, metals, semi-metals, ceramics, and glass. However, it is not limited to these.

The resin used for the base material 1 may be either a homopolymer or a copolymer. Further, the resin used for the base material 1 may be a random copolymer, an alternating copolymer, a block copolymer or a graft polymer.

The thermoplastic resin used for the base material 1 is, for example, olefin resin, acrylic resin, styrene resin, fluororesin, polyester, polyarylate, polycarbonate, polyamide, aramid resin, polyamideimide, polyimide, polyurethane, polyether, polyether sulfone. , Polyether ketone, polyether ether ketone, polyarylene sulfide, polyacetal, silicone resin, and modified resins thereof.

In addition to the above-mentioned modified resin produced, examples of the modified resin include rubber vulcanized with sulfur or a sulfur compound or a radical polymerization initiator.

Examples of the thermosetting resin include phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester, alkyd resin, urethane resin, thermosetting imide resin and the like.
Examples of other resins include lacquer and the like.
Examples of the metal include metals such as copper, aluminum, tungsten, iron, molybdenum, nickel, titanium, silver and gold, or alloys containing two or more kinds of metals (for example, steel such as stainless steel and carbon steel, brass and phosphor bronze). , Zyryl copper alloy, beryllium copper, iron nickel, dichrome, nickel titanium, cantal, hasteloy, and renium tungsten, etc.). Moreover, as a metalloid, silicon and the like can be mentioned.

The base material 1 may be composed of one type of layer alone, or may be a combination of two or more types of layers.

(Pseudo sheet structure)
As described above, the pseudo-sheet structure 2 has a structure in which each of the conductive linear bodies 21 is arranged in a plurality of directions at regular intervals in a direction orthogonal to the length direction of the conductive linear bodies 21. .. This interval in the plurality of conductive linear bodies 21 may be an irregular interval. Further, the intervals in the plurality of conductive linear bodies 21 may be a mixture of regular intervals and irregular intervals.
For example, when a wiring sheet is used as a heating element, the conductive linear bodies 21 are densely arranged in a portion where a large amount of heat is desired to be generated, and the conductive linear bodies 21 are sparsely arranged in a portion where the amount of heat generation is desired to be suppressed. By arranging, the amount of heat generated can be controlled depending on the location.

(Conductive linear body)
Metals and carbon nanotubes can be exemplified as constituting the conductive linear body 21, but the conductive linear body 21 is not limited thereto.
The metal can be used in the form of a wire. Hereinafter, a linear body including a wire made of metal is also referred to as a "metal linear body".

The metal wire has high thermal conductivity, high electrical conductivity, high handleability and versatility. When a metal wire is applied as the conductive wire 21, the resistance value of the pseudo-sheet structure 2 is reduced due to the high electrical conductivity. Further, when the wiring sheet 100 is applied as a heating element, rapid heat generation is easily realized due to high thermal conductivity. Further, since the metal is excellent in processability, it is easy to obtain a linear body having a different thickness depending on the portion even if it is a thin linear body, a thick linear body, or a single linear body.

The linear body including the metal wire may be a linear body composed of one metal wire, or may be a linear body obtained by twisting a plurality of metal wires.
When the wiring sheet 100 is used for wiring, metal wires such as gold and copper having high conductivity can be exemplified. Further, when the wiring sheet is used as a heating element, tungsten, nickel-chromium alloy and the like can be exemplified.
The material of the metal wire is a metal such as copper, aluminum, tungsten, iron, molybdenum, nickel, titanium, silver, or gold, or an alloy containing two or more kinds of metals (for example, steel such as stainless steel and carbon steel, brass, phosphorus). Examples include wires containing bronze, zirconium-copper alloys, beryllium copper, iron-nickel, nichrome, nickel-titanium, cantal, hasteroy, renium tungsten, etc.). Further, the metal wire may be plated with gold, copper, tin, zinc, silver, nickel, chromium, nickel-chromium alloy, solder or the like, and the surface is coated with a carbon material or polymer described later. It may be. In particular, a wire containing tungsten, molybdenum, and one or more metals selected from alloys containing these is preferable from the viewpoint of forming a conductive linear body 21 having a low volume resistivity.
Further, it is preferable that the metal wire itself or the plated portion is made of a material having a low contact resistance such as gold because the electric resistance with the electrode 4 can be lowered.
Examples of the metal wire include a metal wire coated with a carbon material. When the metal wire is coated with a carbon material, the metallic luster is reduced and the presence of the metal wire can be easily made inconspicuous. Further, when the metal wire is coated with a carbon material, metal corrosion is also suppressed.
Examples of the carbon material for coating the metal wire include amorphous carbon (for example, carbon black, activated carbon, hard carbon, soft carbon, mesoporous carbon and carbon fiber, etc.), graphite, fullerene and graphene; carbon nanotubes and the like.

A linear body using carbon nanotubes is, for example, a carbon nanotube forest (a growth body in which a plurality of carbon nanotubes are grown on a substrate so as to be oriented in a direction perpendicular to the substrate, and is an "array". It is obtained by pulling out carbon nanotubes in a sheet shape from the end portion (sometimes referred to as), bundling the pulled out carbon nanotube sheets, and then twisting the bundles of carbon nanotubes. In such a manufacturing method, when no twist is applied at the time of twisting, a ribbon-shaped carbon nanotube linear body is obtained, and when twisted, a thread-like linear body is obtained. In addition, a carbon nanotube linear body can also be obtained by spinning or the like from a dispersion liquid of carbon nanotubes. The production of the carbon nanotube linear body by spinning can be performed, for example, by the method disclosed in US Patent Application Publication No. 2013/0251619 (Japanese Patent Laid-Open No. 2012-126635). From the viewpoint of obtaining uniform diameter of the carbon nanotube wire, it is desirable to use the filamentous carbon nanotube wire, and from the viewpoint of obtaining a highly pure carbon nanotube wire, the carbon nanotube sheet is twisted. It is preferable to obtain a filamentous carbon nanotube linear body. The carbon nanotube linear body may be a linear body in which two or more carbon nanotube linear bodies are woven together. Further, the carbon nanotube linear body may be a linear body in which carbon nanotubes and other conductive materials are composited. Hereinafter, a linear body in which carbon nanotubes and other conductive materials are composited is also referred to as a “composite linear body”.

Examples of the composite linear body include (1) a carbon nanotube linear body in which carbon nanotubes are pulled out from the edge of a carbon nanotube forest into a sheet, the drawn carbon nanotube sheets are bundled, and then the bundle of carbon nanotubes is twisted. In the process of manufacturing carbon nanotubes, a composite linear structure in which a single metal or metal alloy is supported on the surface of a forest, sheet or bundle of carbon nanotubes, or a twisted linear body by vapor deposition, ion plating, sputtering, wet plating, or the like. Body, (2) Elementary substance of metal or linear body of metal alloy or composite linear body, and composite linear body of twisted bundles of carbon nanotubes, (3) Linear body of elemental metal or metal alloy Examples thereof include a composite linear body obtained by knitting a linear body or a composite linear body of the above and a carbon nanotube linear body or a composite linear body.
In the composite linear body of (2), when twisting the bundle of carbon nanotubes, a metal may be supported on the carbon nanotubes in the same manner as in the composite linear body of (1). Further, the composite linear body of (3) is a composite linear body when two linear bodies are knitted, but at least one linear body of a single metal or a linear body of a metal alloy or a composite. If a linear body is included, three or more of a carbon nanotube linear body, a linear body of a single metal, a linear body of a metal alloy, or a composite linear body may be knitted.
Examples of the metal of the composite linear body include simple metals such as gold, silver, copper, iron, aluminum, nickel, chromium, tin and zinc, and alloys containing at least one of these metal simple substances (copper-nickel-phosphorus alloy). Alternatively, copper-iron-phosphorus-zinc alloy, etc.) can be mentioned.

Further, as the conductive linear body 21, a linear body having a conductive coating on the thread can be used. Examples of the yarn include yarns spun from a resin such as nylon or polyester. Examples of the conductive coating include a coating of a metal, a conductive polymer, a carbon material, or the like. The conductive coating can be formed by plating, a vapor deposition method, or the like. A linear body having a conductive coating on the yarn can improve the conductivity of the linear body while maintaining the flexibility of the yarn. That is, it becomes easy to reduce the electric resistance of the pseudo-seat structure 2.

The volume resistivity R of the conductive linear body 21 is preferably 1.0 × 10 ^-9 Ω · m or more and 1.0 × 10 ^-3 Ω · m or less, preferably 1.0 × 10 ^-8 Ω · m. More preferably, it is m or more and 1.0 × 10 ^-4 Ω · m or less.
When the volume resistivity R of the conductive linear body 21 is set to the above range, the surface resistance of the pseudo-sheet structure 2 tends to decrease.
The measurement of the volume resistivity R of the conductive linear body 21 is as follows. Silver paste is applied to both ends of the conductive linear body 21, and the electric resistance of a portion having a length of 40 mm (0.04 m) from the end is measured to obtain the resistance value of the conductive linear body 21. Then, the cross-sectional area (unit: m ² ) of the conductive linear body 21 is multiplied by the above resistance value, and the obtained value is divided by the above measured length (0.04 m) to obtain the conductive linear body. The volume resistivity R of the body 21 is calculated.

The cross-sectional shape of the conductive linear body 21 may be a polygonal shape, a flat shape, an elliptical shape, or the like. From the viewpoint of compatibility with the resin layer 3, it is preferably circular or elliptical.

(Resin layer)
The resin layer 3 is a layer containing a resin. The resin layer 3 is preferably a layer containing an adhesive. The adhesive makes it easy to attach the conductive linear body 21 to the resin layer 3 or the resin layer 3 to the base material 1.

The resin layer 3 is preferably energy ray curable such as ultraviolet rays, visible energy rays, infrared rays or electron beams because it can be easily cured in a short time. The "energy ray curing" also includes thermosetting by heating using energy rays.

Examples of the adhesive of the resin layer 3 include a heat-curable adhesive that cures by heat, a so-called heat-seal type adhesive that adheres by heat, and an adhesive that develops adhesiveness by moistening. However, from the viewpoint of ease of application, it is preferable that the adhesive of the resin layer 3 is energy ray curable. Examples of the energy ray-curable resin include compounds having at least one polymerizable double bond in the molecule, and acrylate-based compounds having a (meth) acryloyl group are preferable.

Examples of the acrylate-based compound include chain aliphatic skeleton-containing (meth) acrylates (trimethylolpropanthry (meth) acrylate, tetramethylolmethanetetra (meth) acrylate, pentaerythritol tri (meth) acrylate, and pentaerythritol tetra (pentaerythritol tetra (meth) acrylate). Meta) acrylate, dipentaerythritol monohydroxypenta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,4-butylene glycol di (meth) acrylate, and 1,6-hexanediol di (meth) acrylate, etc.) , Cyclic aliphatic skeleton-containing (meth) acrylate (dicyclopentanyldi (meth) acrylate, dicyclopentadiene di (meth) acrylate, etc.), polyalkylene glycol (meth) acrylate (polyethylene glycol di (meth) acrylate, etc.), Examples thereof include oligoester (meth) acrylate, urethane (meth) acrylate oligomer, epoxy-modified (meth) acrylate, polyether (meth) acrylate other than the polyalkylene glycol (meth) acrylate, and itaconic acid oligomer.

The weight average molecular weight (Mw) of the energy ray-curable resin is preferably 100 to 30,000, and more preferably 300 to 10,000.

The energy ray-curable resin contained in the adhesive composition may be only one type, may be two or more types, and when there are two or more types, the combination and ratio thereof can be arbitrarily selected. Further, it may be combined with a thermoplastic resin described later, and the combination and ratio can be arbitrarily selected.

The resin layer 3 may be a pressure-sensitive adhesive layer formed of a pressure-sensitive adhesive (pressure-sensitive adhesive). The adhesive in the adhesive layer is not particularly limited. For example, examples of the pressure-sensitive adhesive include an acrylic pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a polyvinyl ether-based pressure-sensitive adhesive. Among these, the pressure-sensitive adhesive is preferably at least one selected from the group consisting of acrylic-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, and rubber-based pressure-sensitive adhesives, and more preferably acrylic-based pressure-sensitive adhesives.

As the acrylic pressure-sensitive adhesive, for example, a polymer containing a structural unit derived from an alkyl (meth) acrylate having a linear alkyl group or a branched alkyl group (that is, a polymer obtained by at least polymerizing an alkyl (meth) acrylate). ), An acrylic polymer containing a structural unit derived from a (meth) acrylate having a cyclic structure (that is, a polymer obtained by at least polymerizing a (meth) acrylate having a cyclic structure) and the like. Here, "(meth) acrylate" is used as a term indicating both "acrylate" and "methacrylate", and the same applies to other similar terms.

When the acrylic polymer is a copolymer, the form of copolymerization is not particularly limited. The acrylic copolymer may be any of a block copolymer, a random copolymer, and a graft copolymer.

The acrylic copolymer may be crosslinked with a crosslinking agent. Examples of the cross-linking agent include known epoxy-based cross-linking agents, isocyanate-based cross-linking agents, aziridine-based cross-linking agents, and metal chelate-based cross-linking agents. When cross-linking an acrylic copolymer, a hydroxyl group or a carboxyl group that reacts with these cross-linking agents should be introduced into the acrylic copolymer as a functional group derived from the monomer component of the acrylic polymer. Can be done.

When the resin layer 3 is formed of a pressure-sensitive adhesive, the resin layer 3 may further contain the above-mentioned energy ray-curable resin in addition to the pressure-sensitive adhesive.
When an acrylic pressure-sensitive adhesive is applied as the pressure-sensitive adhesive, the energy ray-curable component includes a functional group that reacts with a functional group derived from a monomer component in the acrylic copolymer and an energy ray-polymerizable functional group. A compound having both groups in one molecule may be used. By reacting the functional group of the compound with the functional group derived from the monomer component in the acrylic copolymer, the side chain of the acrylic copolymer can be polymerized by energy ray irradiation. Even when the pressure-sensitive adhesive is other than the acrylic pressure-sensitive adhesive, a component having an energy ray-polymerizable side chain may be used as the polymer component other than the acrylic polymer.

The thermosetting resin used for the resin layer 3 is not particularly limited, and specifically, an epoxy resin, a phenol resin, a melamine resin, a urea resin, a polyester resin, a urethane resin, an acrylic resin, a benzoxazine resin, or a phenoxy resin. , Amine-based compounds, acid anhydride-based compounds, and the like. These can be used alone or in combination of two or more. Among these, epoxy resins, phenol resins, melamine resins, urea resins, amine compounds and acid anhydride compounds are preferably used from the viewpoint of being suitable for curing using an imidazole-based curing catalyst, and are particularly excellent. From the viewpoint of exhibiting curability, at least one selected from the group consisting of epoxy resins, phenol resins, mixtures thereof or epoxy resins, and phenol resins, melamine resins, urea resins, amine compounds and acid anhydride compounds. It is preferable to use a mixture with.

A moisture-curable resin may be used for the resin layer 3. The moisture-curable resin used for the resin layer 3 is not particularly limited, and examples thereof include urethane resins and modified silicone resins produced by curing isocyanate with moisture.

When an energy ray-curable resin or a thermosetting resin is used for the resin layer 3, it is preferable to use a photopolymerization initiator, a thermosetting initiator, or the like. By using a photopolymerization initiator, a thermal polymerization initiator, or the like, a crosslinked structure is formed, and the pseudo-sheet structure 2 and the electrode 4 can be more firmly bonded and further protected.

Photopolymerization initiators include benzophenone, acetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin benzoic acid, methyl benzoin benzoate, benzoin dimethyl ketal, 2,4-diethylthioxanthone, 1 -Hydroxycyclohexylphenyl ketone, benzyldiphenylsulfide, tetramethylthium monosulfide, azobisisobutyronitrile, 2-chloroanthraquinone, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide and bis (2,4,6- Trimethylbenzoyl) -phenyl-phosphine oxide and the like can be mentioned.

Examples of the thermal polymerization initiator include hydrogen peroxide, peroxodisulfate (ammonium peroxodisulfate, sodium peroxodisulfate, potassium peroxodisulfate, etc.), and azo compounds (2,2'-azobis (2-amidinopropane) di. Hydrochloride, 4,4'-azobis (4-cyanovaleric acid), 2,2'-azobisisobutyronitrile and 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), etc.) and Examples thereof include organic peroxides (benzoyl peroxide, lauroyl peroxide, peracetic acid, persuccinic acid, di-t-butyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, etc.).

These polymerization initiators can be used alone or in combination of two or more.
When a crosslinked structure is formed using these polymerization initiators, the amount used shall be 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the energy ray-curable resin or the thermosetting resin. Is preferable, and it is more preferably 1 part by mass or more and 100 parts by mass or less, and particularly preferably 1 part by mass or more and 10 parts by mass or less.

The resin layer 3 may contain a filler. The type of filler is appropriately selected depending on the application of the wiring sheet 100, the resin in the resin layer, and the like.

For example, by using an inorganic filler as the filler contained in the resin layer 3, the hardness, thermal conductivity, or insulating property of the cured resin layer 3 can be further improved. As a specific example of this, when the base material 1 contains glass as a main component, the linear expansion coefficients of the resin layer 3 and the base material 1 can be brought close to each other.

Examples of the inorganic filler include inorganic powders (for example, powders such as silica, alumina, talc, calcium carbonate, titanium white, red iron oxide, silicon carbide, and boron nitride), spherical beads of inorganic powder, single crystal fibers, and the like. Examples include glass fiber. Among these, silica filler and alumina filler are preferable as the inorganic filler. The inorganic filler may be used alone or in combination of two or more.

The resin layer 3 may contain other components. Other ingredients include, for example, well-known additives such as organic solvents, flame retardants, tackifiers, UV absorbers, antioxidants, preservatives, fungicides, plasticizers, defoamers and wettability modifiers. Can be mentioned.

(electrode)
The electrode 4 is used to supply an electric current to the conductive linear body 21.
The ratio of the resistance values of the electrode 4 and the pseudo-sheet structure 2 is preferably 0.0001 or more and 0.3 or less, and more preferably 0.0005 or more and 0.1 or less. The ratio of the resistance value of the electrode and the pseudo-sheet structure 2 can be obtained by "the resistance value of the electrode 4 / the resistance value of the pseudo-sheet structure 2". Within this range, when the wiring sheet 100 is used as a heating element, abnormal heat generation at the electrode portion is suppressed. When the pseudo sheet structure 2 is used as the sheet heater, the pseudo sheet structure 2 generates heat, and a sheet heater having good heat generation efficiency can be obtained.
The resistance values of the electrode 4 and the pseudo-sheet structure 2 can be measured using a tester. First, the resistance value of the electrode 4 is measured, then the electrode 4 is attached to the pseudo-sheet structure 2, and the resistance value in the attached state is measured. After that, the resistance values of the electrodes 4 and the pseudo-sheet structure 2 are calculated by subtracting the resistance values of the electrodes 4 from the resistance values of the pseudo-sheet structure 2 to which the electrodes are attached.

(Electrode wire)
As the electrode wire 41, those mentioned in the conductive linear body 21 can be used.
Further, as the electrode wire 41, a strip-shaped conductor such as a foil or a plate may be used.
When a strip-shaped conductor is used, the diameter d is read as the thickness.
It is preferable that the electrode wire 41 is a strip-shaped conductor such as a foil or a plate because the contact area with the conductive linear body 21 can be widened.

(Production method)
The method for manufacturing the wiring sheet according to the present embodiment is manufactured as shown in FIGS. 4A to 4E. As shown in FIGS. 4A and 4B, the base material 1 is prepared, and then the resin layer 3 is formed on the base material 1. Further, as shown in FIGS. 4C and 4D, the conductive linear body 21 is provided on the resin layer 3, and the electrode wires 41 are arranged at both ends of the conductive linear body 21. Then, as shown in FIG. 4E, the wiring sheet 100 is created by folding both ends of the conductive linear body 21 in the length direction.

In the production of the folded edge 22, the base material 1, the resin layer 3, and the pseudo-sheet structure 2 are folded back. The wiring sheet 100 can be manufactured by bringing the first region 5 of the pseudo-sheet structure 2 into contact with the electrode 4 at the time of folding back.
The electrode 4 may be arranged in the first region 5 of the pseudo-sheet structure 2 and the electrode 4 may be brought into contact with the second region 7 when folded back.
When the base material 1 and the resin layer 3 have thermoplasticity, they may be folded back while being heated.
Further, when the base material 1 or the resin layer 3 is a curable resin, the wiring sheet 100 may be manufactured by folding it back and then curing it.

As the method for forming the resin layer 3 described above, it can be provided by applying a resin.
A manufacturing method in which a plurality of conductive linear bodies 21 are provided on the resin layer 3 is manufactured, for example, through the following steps.
A cylindrical drum member having a predetermined diameter is prepared, and a base material 1 provided with a resin layer 3 is arranged on the outer peripheral surface of the drum member. A plurality of bobbins around which the conductive linear body 21 is wound are prepared. The conductive linear body 21 is fed out in parallel at a predetermined distance from each bobbin, and the conductive linear body 21 is made of resin by rotating the drum member while adhering the conductive linear body 21 to the resin layer 3. Adhere to layer 3. The pseudo-sheet structure 2 is composed of a plurality of conductive linear bodies 21 attached to the resin layer 3.

(Action and effect of the first embodiment)
According to this embodiment, the following effects can be obtained.
(1) According to the present embodiment, the contact between the conductive linear body 21 and the electrode 4 has been limited to the second region 7 in the past, but in addition to the second region 7, the first region Contact also occurs in 5. As a result, the contact area can be expanded and the electrical resistance of the wiring sheet 100 can be reduced.
Further, since the contact resistance between the conductive linear body 21 and the electrode 4 can be reduced, power loss can be suppressed.
(2) When the wiring sheet 100 is used as a heating element, the contact resistance between the conductive linear body 21 and the electrode 4 can be reduced, so that the contact between the conductive linear body 21 and the electrode 4 can be reduced. Heat generation due to resistance can be suppressed. As a result, the heat generated by the wiring sheet 100 is based on the heat generated by the conductive linear body 21, so that the heat can be uniformly generated.

[Second Embodiment]
Next, the second embodiment of the present invention will be described with reference to the drawings.
In the second embodiment of the present invention, the resin layer 3 has the same configuration as that of the first embodiment except that the resin layer 3 is composed of a plurality of resin strips 31, so the changes will be described, and the other previous description will be described. The parts in common with are omitted.

In the wiring sheet 100A according to the present embodiment, as shown in FIGS. 5 and 6, the resin layer 3 arranged on the base material 1 is orthogonal to the length direction of the conductive linear body 21 in a plan view. A plurality of resin strips 31 having a width W in the direction are arranged substantially in parallel with a predetermined interval P. Then, a conductive linear body 21 having a diameter D is arranged on each resin strip-shaped body 31 having a thickness t.

(Production method)
The method for producing the resin strip 31 is, for example, the following process.
In the manufacturing method of the first embodiment, the resin strip 31 can be provided by applying the resin in a plurality of strips.

(Action and effect of the second embodiment)
(3) According to the present embodiment, the range in which the resin strip 31 is provided can be limited to the range required for the conductive linear body 21 to adhere to the base material 1, so that the resin used for the resin layer 3 can be used. Can be reduced.
(4) According to the present embodiment, since a gap is formed between the resin strips 31, the bending resistance can be reduced when the folded edge 22 is manufactured.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings.
In the third embodiment of the present invention, except that the conductive linear body 21 has a wavy shape, the configuration is the same as that of the first embodiment or the second embodiment. The parts common to the explanation of are omitted.

As shown in FIG. 7, in the wiring sheet 100B according to the present embodiment, in the pseudo-sheet structure 2, a plurality of conductive linear bodies 21 having the same amplitude and wavelength in a plan view are aligned in phase. , Arranged and configured almost in parallel at predetermined intervals.

(Production method)
The manufacturing method for forming the conductive linear body 21 into a wavy shape is, for example, manufactured through the following steps.
In the manufacturing method of the first embodiment, when the cylindrical drum member is rotated while the conductive linear body 21 is attached to the resin layer 3, the drum member or the bobbin is vibrated in the drum axial direction to be conductive. The sex linear body 21 can have a wavy shape.

(Action and effect of the third embodiment)
According to this embodiment, the following effects can be obtained.
(5) According to the present embodiment, even if the wiring sheet 100B is deformed by bending or the like, it is possible to cope with the change in shape by deforming the waveform of the conductive linear body 21. Therefore, the breakage of the conductive linear body 21 can be suppressed, and the force applied to the contact point between the conductive linear body 21 and the electrode 4 can be relaxed, so that the contact can be maintained.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications and improvements within the range in which the object of the present invention can be achieved are included in the present invention.
In the wiring sheet 100 of the first embodiment, a flexible base material can be used as the base material 1. The flexible base material refers to a base material that is easily bent at room temperature and has flexibility. Examples of the flexible base material include synthetic resin films, papers, non-woven fabrics and cloths (woven or knitted fabrics).

In the wiring sheet 100 of the first embodiment, the base material 1 supports the conductive linear body 21 via the resin layer 3. However, the base material 1 may directly support the conductive linear body 21.
For example, all or part of the conductive linear body 21 may be inside the base material 1 except for the portion in contact with the electrode 4. Further, when the base material 1 is manufactured as a woven fabric, the conductive linear body 21 is used as a part of the warp or the weft, and is woven to support the conductive linear body 21 by using the base material 1. You may.

In the wiring sheet 100 of the first embodiment, the folded edge 22 is folded back including the base material 1. However, since the contact resistance can be reduced by expanding the contact area between the conductive linear body 21 constituting the pseudo sheet structure 2 and the electrode 4, the contact resistance can be reduced, so that the wiring sheet 100C shown in FIG. 8 can be used. Only the pseudo sheet structure 2 and the resin layer 3 may be folded back. Further, only the pseudo sheet structure 2 may be folded back.
Since the pseudo-sheet structure 2 can be folded back independently of the resin layer 3 or the base material 1, the length of the base material 1 or the resin layer 3 may be longer than the length of the pseudo-sheet structure 2. , Or may be short.

In the wiring sheet 100 of the first embodiment, as shown in FIG. 2, at the folded end edge 22, the end portion of the conductive linear body 21 in the first region 5 exceeds the upper line of the electrode 4 and is in the second region. It is in a state of being extended in parallel with 7. However, as shown in FIGS. 9A and 9B, at the folded end edge 22, the electrode 4 and the end portion of the conductive linear body 21 in the first region 5 may be in a contact state different from that of the wiring sheet 100.
The wiring sheet 100D shown in FIG. 9A is in a state in which the end portion of the conductive linear body 21 in the first region 5 is bent toward the second region 7 and is in direct contact with the second region 7. Further, the wiring sheet 100E shown in FIG. 9B is in a state where the end portion of the conductive linear body 21 in the first region 5 is provided up to a position where it comes into contact with the upper line of the electrode 4.
In the contact of FIG. 9A, since the first region 5 can be brought into contact with the outer edge of the electrode wire 41, the contact area between the conductive linear body 21 and the electrode 4 can be expanded, so that the conductive wire can be contacted. The contact between the body 21 and the electrode 4 can be stabilized. The contact between the conductive linear body 21 and the electrode 4 may be direct contact or indirect contact. Adhesives or double-sided tape can be used for indirect contact. Further, in the case of direct contact or indirect contact, the contact resistance can be reduced by electrically connecting using a conductive adhesive or a conductive double-sided tape.
Further, the contact between the end portion of the conductive linear body 21 in the first region 5 and the conductive linear body 21 in the second region 7 may be fixed by adhesion or the like. For fixing, the conductive linear bodies 21 may be directly fixed to each other. Further, the base material 1 or the resin layer 3 may be fixed by thermocompression bonding or sewing using a known method depending on the material.
For the sake of brevity, the electrode 4 is described as being composed of one electrode wire 41.

In the wiring sheet 100D shown in FIG. 9A, a conductive linear body 21 is further arranged along the outer edge of the electrode wire 41 at the folded end edge 22, as in the wiring sheet 100F shown in FIG. 10A. There may be almost no gap between the body 21 and the electrode wire 41.
Since there is almost no gap between the conductive linear body 21 and the electrode wire 41, the contact area between the conductive linear body 21 and the electrode wire 41 can be maximized.
Like the wiring sheet 100G shown in FIG. 10B and the wiring sheet 100H shown in FIG. 10C, the conductive linear body 21 may be brought into contact with the conductive linear body 21 along one side surface of the electrode wire 41 at the folded end edge 22.

In the wiring sheet 100 of the first embodiment, the electrode 4 is composed of the electrode wire 41. However, the electrode 4 may be an electrode obtained by solidifying a liquid conductive material (that is, an electrode made of a solidified liquid conductive material). When a liquid conductive material is used, a better connection state between the conductive linear body 21 and the electrode 4 can be ensured.
A typical example of the above-mentioned liquid conductive material is a conductive paste. As the conductive paste, for example, a paste in which metal particles or carbon particles are dispersed in a binder resin and / or an organic solvent can be applied. Examples of the metal particles include metal particles such as gold, silver, copper and nickel. Examples of the binder resin include well-known resins such as polyester resin, polyurethane resin, epoxy resin and phenol resin.
As the liquid conductive material, for example, solder, conductive ink, or the like may be used in addition to the conductive paste.

Further, as the electrode 4, a conductive foil or plate and a liquid conductive material may be used in combination. A conductive foil or plate may be attached after applying a liquid conductive material to the pseudo-sheet structure 2, or a liquid conductive material may be applied after attaching the conductive foil or plate. ..
The combined use of a conductive foil or plate with a liquid conductive material improves the electrical connection of the electrodes.

In the wiring sheet 100 of the first embodiment, the first region 5 and the second region 7 between the adjacent electrode wires 41 are separated from each other and have a gap. However, the first region 5 and the second region 7 between the adjacent electrode wires 41 may be brought into contact with each other. By bringing the first region 5 and the second region 7 into contact with each other, the gap is reduced and the contact area between the conductive linear body 21 and the electrode wire 41 is increased, which is preferable.

In the wiring sheet 100 of the first embodiment, the resin layer 3 and the base material 1 are arranged on one side of the pseudo sheet structure 2. However, the base material 1 or the resin layer 3 may be present on both sides of the pseudo-sheet structure 2. Further, it may be a composite laminate in which only the pseudo-sheet structure 2 or a laminate composed of the pseudo-sheet structure 2 and the base material 1 or the resin layer 3 is further laminated. In the case of a composite laminated body, the single or plurality of pseudo-sheet structures 2 may be the same or different. Similarly, the single or plurality of base materials 1 or resin layer 3 may be the same or different.

In the wiring sheet 100B of the third embodiment, the pseudo-sheet structure 2 is composed of a plurality of conductive linear bodies 21 having a sinusoidal waveform having the same amplitude and wavelength in a plan view and having the same phase. .. However, the waveform of the conductive linear body 21 may have a wave shape such as a rectangular wave, a triangular wave, and a sawtooth wave. Further, the waveform may be different for each conductive linear body 21. Further, the phase may be different for each conductive linear body 21.

(Use of wiring sheet)
When the wiring sheet 100 is used as a heating element (sheet-shaped heater), examples of the use of the heating element include a defogger and a deicer. In this case, examples of the adherend include mirrors in bathrooms, windows of transportation devices (passenger cars, railroads, ships, aircraft, etc.), windows / wallpapers of buildings, eyewear, lighting surfaces of traffic lights, signs, and the like. Be done. In recent years, heaters have been used to control the temperature of batteries in electric vehicles, and thin heaters are suitable for individual temperature control of laminated cells. Further, the wiring sheet 100 can be used as another use of the heating element as a heater incorporated in a chair or a seat of a transportation device (passenger car, railroad, ship, aircraft, etc.).

Hereinafter, the present invention will be described with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

[Example 1]
An adhesive sheet having an acrylic pressure-sensitive adhesive (manufactured by Lintec Corporation, trade name: "PK") having a thickness of 20 μm was prepared on a base material made of a thermal-bonded non-woven fabric made of polyester having a basis weight of 40 g / m ^2. As a conductive linear body, a tungsten wire (diameter 25 μm, manufacturer name: manufactured by Tokusai Co., Ltd., product name: TWG-CS) was prepared.
The adhesive sheet was wrapped with the adhesive surface on the outside so that the peripheral surface of the rubber drum member was not wrinkled. Both ends of the adhesive sheet in the circumferential direction were fixed with double-sided tape. The tungsten wire wound around the bobbin was attached to the surface of each resin strip in the adhesive sheet located near the end of the drum member, and then wound up by the drum member while feeding out the tungsten wire.
By rotating the drum member once, the tungsten wire was wound around the adhesive sheet. In this way, a pseudo-sheet structure in which a plurality of tungsten wires were installed at equal intervals was formed on the surface of the adhesive sheet. At this time, the drum member was rotated while vibrating in the direction of the drum axis so that the wound tungsten wire drew a wavy shape. Tungsten wires were provided at equal intervals of 25, and the intervals were 10 mm. Next, as an electrode, a gold-plated copper wire (diameter 150 μm, manufacturer name: manufactured by Tokusai Co., Ltd., product name: C1100-H AuP) was used. The electrodes were attached to both ends of the tungsten wire in a direction orthogonal to the direction in which the tungsten wire extends. Four gold-plated copper wires were used for each electrode, and a total of eight gold-plated copper wires were used. The distance between the two electrodes was 200 mm at the innermost distance between the copper wires. After that, by folding back both ends, the upper and lower parts of each of the four electrodes were sandwiched between pseudo-sheet structures so that the tungsten wire and the electrodes were in contact with each other from above and below. The gap between the folded edge and the electrode was 5 mm. The width of the first region was 10 mm. Subsequently, a similar non-woven fabric was attached to the adhesive surface on which the tungsten wire of the pseudo-sheet structure was arranged to prepare a wiring sheet.

A voltage of 2.0 V to 6.0 V was applied to the wiring sheet using a DC power supply, and the resistance value was obtained from the current value. Based on this, the wiring sheet was evaluated.
[Example 2]
Wired in the same manner as in Example 1 except that a tungsten wire was plated with gold as a conductive linear body (diameter 25 μm, manufacturer name: manufactured by Tokusai Co., Ltd., product name: Au (0.1) -TWG). A sheet was prepared and evaluated in the same manner as in Example 1.

[Example 3]
Gold-plated tungsten wire as a conductive linear body Tungsten wire (diameter 25 μm, manufacturer name: manufactured by Tokusai Co., Ltd., product name: Au (0.1) -TWG) is used, and gold in Example 1 is used as an electrode. Same as Example 1 except that the four plated copper wires were replaced with conductive copper foil adhesive tape (manufactured by Teraoka Mfg. Co., Ltd., 8323-10 × 20) and the adhesive surface of the copper foil adhesive tape was attached to the gold-plated tungsten wire surface. To prepare a wiring sheet. The width of the copper foil was 10 mm, the thickness of the copper foil was 0.035 mm, and the distance between the inner ends of the copper foil at both ends of the gold-plated tungsten wire was 200 mm.
The wiring sheet was evaluated in the same manner as in Example 1.

[Comparative Example 1]
After the electrodes were attached, the wiring sheet and evaluation were carried out in the same manner as in Example 1 except that the non-woven fabric was attached without folding back the ends.

[Comparative Example 2]
After the electrodes were attached, the wiring sheet and evaluation were carried out in the same manner as in Example 2 except that the non-woven fabric was attached without folding back the ends.

[Comparative Example 3]
After the electrodes were attached, the wiring sheet and evaluation were carried out in the same manner as in Example 3 except that the non-woven fabric was attached without folding back the ends.

FIG. 11 shows the applied voltage in Comparative Example 1 in which the pseudo-sheet structure was in contact with the electrodes only in the first region 5 and the second region 7 and the pseudo-sheet structure was in contact with the electrodes. It is a graph which showed the relationship between a resistance value and a resistance value.
Similarly, FIG. 12 is a graph showing the relationship between the applied voltage and the resistance value in Example 2 and Comparative Example 2.
Similarly, FIG. 13 is a graph showing the relationship between the applied voltage and the resistance value in Example 3 and Comparative Example 3.

In any of FIGS. 11 to 13, it is shown that the wiring sheet in the embodiment has lower electrical resistance than the wiring sheet in the comparative example at each voltage applied to the heater.
It is considered that the reason why the wiring sheet in the examples showed low electrical resistance was that the contact area between the conductive linear body and the electrode was expanded, so that the contact resistance between the two was mainly reduced.

Also, in general, the resistance value of a conductor increases as the temperature rises. Therefore, when the conductive linear body is heat-generating, it is considered that the applied voltage increases and the resistance value increases. If this is graphed as the relationship between the voltage and the resistance value, it is recognized that the curve or straight line rises to the right.
In Examples 2 and 3, a curve rising to the right is obtained in the graph showing the relationship between the voltage and the resistance value. This is considered to indicate that in Examples 2 and 3, heat was generated according to the applied voltage because the resistance due to the contact between the conductive linear body and the electrode was stable.
In Example 2, it is recognized that the contact resistance between the conductive linear body and the electrode was stabilized by using the conductive linear body having gold on the surface as well as expanding the contact area by the bent portion. .. Further, in Example 3, in addition to the reason of Example 2, a copper foil capable of increasing the contact area with the conductive linear body is used for the electrode, so that the conductive linear body and the electrode are separated from each other. It is considered that the contact resistance is stable.
On the other hand, if the contact between the conductive linear body and the electrode is unstable, the heat generation becomes unstable due to the unstable contact resistance, and the resistance value against the applied voltage is also considered to be unstable.

As described above, it has been confirmed that according to the present invention, it is possible to provide a wiring sheet with reduced electrical resistance. Further, according to the present invention, it is considered that the contact resistance between the conductive linear body and the electrode is reduced. Therefore, when the wiring sheet is used as a heating element, the contact resistance between the conductive linear body and the electrode is considered to be reduced. It is possible to provide a wiring sheet that suppresses heat generation at the contact portion of the wire and generates heat more uniformly.

1 ... Base material, 2 ... Pseudo-sheet structure, 21 ... Conductive linear body, 22 ... Folded edge, 3 ... Resin layer, 31 ... Resin strip, 4 ... Electrode, 41 ... Electrode wire, 5 ... First Area, 6 ... Folded area, 7 ... Second area, 100, 100A-100H ... Wiring sheet.

Claims (12)

1. A pseudo-sheet structure in which a plurality of conductive linear bodies are arranged at intervals and a pair of electrodes are provided.
   In a plan view of the pseudo-sheet structure, at least one end of the pseudo-sheet structure in the length direction of the conductive linear body is provided with a folded edge portion.
   The pseudo-sheet structure before folding includes a first region, a folding region serving as the folding edge portion, and a second region facing the first region after folding, in order from the end.
   The pseudo-sheet structure and one of the electrodes are electrically connected in the first region and the second region.
   Wiring sheet.
2. In the wiring sheet according to claim 1,
   Both ends of the pseudo-sheet structure in the length direction of the conductive linear body have folded edges.
   At the folded edges at both ends, the respective electrodes are electrically connected in the first region and the second region.
   Wiring sheet.
3. In the wiring sheet according to claim 1 or 2.
   Further, a base material for supporting the conductive linear body is provided.
   Wiring sheet.
4. In the wiring sheet according to claim 3,
   The base material is a flexible base material.
   Wiring sheet.
5. In the wiring sheet according to claim 4,
   The flexible substrate is a synthetic resin film, paper, non-woven fabric or cloth.
   Wiring sheet.
6. In the wiring sheet according to any one of claims 1 to 5,
   Further, a resin layer for supporting the conductive linear body is provided.
   Wiring sheet.
7. In the wiring sheet according to claim 6,
   Further, at least a part of the conductive linear body is embedded in the resin layer.
   Wiring sheet.
8. In the wiring sheet according to any one of claims 1 to 7.
   The electrode is a metal wire,
   Wiring sheet.
9. In the wiring sheet according to any one of claims 1 to 8.
   The conductive linear body in the first region and the conductive linear body in the second region are in direct or indirect contact with each other.
   Wiring sheet.
10. In the wiring sheet according to any one of claims 1 to 9,
    In the plan view of the pseudo-sheet structure, the gap between the folded edge portion and the electrode is 50 mm or less.
    Wiring sheet.
11. In the wiring sheet according to any one of claims 1 to 10.
    In the plan view of the pseudo-sheet structure, the conductive linear body has a wavy shape.
    Wiring sheet.
12. In the wiring sheet according to any one of claims 1 to 11.
    Used as a heating element,
    Wiring sheet.

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