WO2024070718A1 - Feuille de câblage et élément chauffant en forme de feuille - Google Patents

Feuille de câblage et élément chauffant en forme de feuille Download PDF

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Publication number
WO2024070718A1
WO2024070718A1 PCT/JP2023/033466 JP2023033466W WO2024070718A1 WO 2024070718 A1 WO2024070718 A1 WO 2024070718A1 JP 2023033466 W JP2023033466 W JP 2023033466W WO 2024070718 A1 WO2024070718 A1 WO 2024070718A1
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WO
WIPO (PCT)
Prior art keywords
conductive linear
sheet
linear body
conductive
electrodes
Prior art date
Application number
PCT/JP2023/033466
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English (en)
Japanese (ja)
Inventor
雅春 伊藤
拓也 大嶋
Original Assignee
リンテック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2022158949A external-priority patent/JP2024052310A/ja
Priority claimed from JP2022158993A external-priority patent/JP2024052337A/ja
Application filed by リンテック株式会社 filed Critical リンテック株式会社
Publication of WO2024070718A1 publication Critical patent/WO2024070718A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/03—Electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater

Definitions

  • the present invention relates to a wiring sheet and a sheet-shaped heater.
  • Patent Document 1 describes a conductive sheet having a pseudo-sheet structure in which a plurality of linear elements extending in one direction are arranged at intervals. A pair of electrodes is provided on both ends of the linear elements, thereby obtaining a wiring sheet that can be used as a heating element.
  • the sheet shape is required to be various. In such cases, the pair of electrodes may not be parallel, or the electrodes may have an irregular shape. Therefore, the distance between the electrodes changes depending on the location in the sheet plane, which may cause overheating in the sheet plane.
  • the object of the present invention is to provide a wiring sheet and a sheet-shaped heater that can prevent overheating within the sheet plane even when a pair of electrodes are not parallel.
  • a pseudo sheet structure having a plurality of conductive linear bodies arranged at intervals and a pair of electrodes, At least one of the conductive linear bodies has a distance between a contact point of the conductive linear body and the electrode different from that of the other conductive linear body, At least one of the conductive linear bodies is different from the other one in at least one of a material, a surface layer material, a diameter, and a wavy shape in a plan view. Wiring sheet.
  • the wiring sheet according to [1] The conductive linear body has a straight or wavy shape in a plan view, and when the length of the conductive linear body between the electrodes of the a-th conductive linear body counting from one end of the pseudo sheet structure is La , the resistivity is ⁇ a , and the cross-sectional area is Sa , and when the length of the conductive linear body between the electrodes of the b-th conductive linear body counting from one end of the pseudo sheet structure is Lb , the resistivity is ⁇ b , and the cross-sectional area is Sb , the condition shown in the following formula (F1) is satisfied: Wiring sheet.
  • the wiring sheet according to [1] or [2], The conductive linear body is made of a material containing tungsten, At least one of the conductive linear bodies has a surface layer material different from that of the other conductive linear bodies. Wiring sheet.
  • a pseudo sheet structure having a plurality of conductive linear bodies arranged at intervals and a pair of electrodes, At least one of the conductive linear bodies is different from the other one in at least one of a material, a surface layer material, a diameter, and a wavy shape in a plan view. Wiring sheet.
  • the conductive linear body is of three or more types, Three or more types of conductive linear bodies are periodically arranged. Wiring sheet.
  • One of the three or more types of conductive linear bodies has a material or a surface layer material different from that of the other types, The conductive linear bodies are spaced apart from each other by 1.5 mm or less. Wiring sheet.
  • FIG. 1 is a schematic diagram showing a wiring sheet according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the II-II cross section of FIG.
  • FIG. 2 is a cross-sectional view showing the III-III section of FIG.
  • FIG. 4 is a schematic diagram showing a wiring sheet according to a second embodiment of the present invention.
  • 5 is a cross-sectional view showing the VV section of FIG. 4.
  • the wiring sheet 100 includes a substrate 1, a pseudo sheet structure 2, a resin layer 3, and a pair of electrodes 4.
  • the wiring sheet 100 includes the resin layer 3 laminated on the substrate 1, and the pseudo sheet structure 2 laminated on the resin layer 3.
  • the pseudo sheet structure 2 includes a plurality of conductive linear members 21 arranged at intervals. 1, the electrodes 4 have irregular shapes and are not parallel when viewed from above, so that at least one of the conductive linear bodies 21 has a length between the electrodes 4 that is different from that of the other conductive linear bodies 21. At least one of the conductive linear bodies 21 is different from the other one in at least one of the material, surface layer material, diameter, and wavy shape in a plan view. Specifically, as shown in Figures 1, 2, and 3, the diameter D of the conductive linear bodies 21 is changed according to the length of the conductive linear body 21 between the electrodes 4.
  • wiring sheet 100 according to this embodiment can suppress overheating within the sheet plane even when a pair of electrodes 4 are not parallel. That is, when the pair of electrodes 4 are not parallel, overheating occurs in the sheet plane because the difference in the distance between the contact points of the conductive linear body 21 and the electrodes 4 results in a difference in the power consumption per unit length between the electrodes 4.
  • the resistance value per unit length of the conductive linear body 21 or the resistance value of the conductive linear body 21 between the electrodes 4 can be adjusted by appropriately adjusting at least one of the material, surface layer material, diameter, and wavy shape in a plan view of the conductive linear body 21. This makes it possible to adjust the power consumption per unit length between the electrodes 4 to be more uniform. In this way, overheating in the sheet plane can be suppressed.
  • the conductive linear objects 21 may be made of different materials.
  • the resistance value per unit length of the conductive linear body 21 can be changed depending on the material by changing the material. For example, the higher the resistivity ⁇ of a material used, the higher the resistance value per unit length of the conductive linear body 21.
  • the surface layer materials of any of the conductive linear bodies 21 may be different from each other.
  • the resistance value per unit length of the conductive linear body 21 can be changed according to the type of surface layer material by changing the type of the surface layer material. For example, the lower the resistivity ⁇ of the surface layer material used, the lower the resistance value per unit length of the conductive linear body 21.
  • the diameters of any of the conductive linear objects 21 may be different.
  • the resistance value per unit length of the conductive linear body 21 can be changed according to the diameter because changing the diameter changes the cross-sectional area S. For example, the larger the diameter of the conductive linear body 21, the lower the resistance value per unit length of the conductive linear body 21.
  • the wavy shape in a plan view may be different between any two adjacent conductive linear objects 21 .
  • the resistance value of the conductive linear body 21 between the electrodes 4 can be changed according to the waveform, wavelength, amplitude, etc., because changing the wave shape (waveform, wavelength, amplitude, etc.) in a plan view changes the length of the conductive linear body 21. For example, the shorter the wavelength and the larger the amplitude, the higher the resistance value of the conductive linear body 21 between the electrodes 4.
  • At least one of the material, surface material, diameter, and wavy shape in plan view of the conductive linear body 21 may be adjusted as appropriate. Two or more of these may also be adjusted in combination.
  • the conductive linear body 21 has a straight or wavy shape in a planar view, and when the length of the conductive linear body 21 between the electrodes 4 of the a-th conductive linear body 21 counting from one end of the pseudo sheet structure 2 is La , the resistivity is ⁇ a , and the cross-sectional area is Sa , and when the length of the conductive linear body 21 between the electrodes 4 of the b-th conductive linear body counting from one end of the pseudo sheet structure 2 is Lb , the resistivity is ⁇ b , and the cross-sectional area is Sb , it is preferable that the condition shown in the following formula (F1) is satisfied.
  • the value of Sb /( ⁇ b ⁇ Lb2 ) is equal to or greater than the lower limit and equal to or less than the upper limit, overheating in the sheet plane can be suppressed.
  • the value of Sb /( ⁇ b ⁇ Lb2 ) is more preferably equal to or greater than 0.63 ⁇ Sa /( ⁇ a ⁇ La2 ) ⁇ , even more preferably equal to or greater than 0.66 ⁇ Sa /( ⁇ a ⁇ La2 ) ⁇ , and particularly preferably equal to or greater than 0.70 ⁇ Sa /( ⁇ a ⁇ La2 ) ⁇ .
  • the value of S b /( ⁇ b ⁇ L b 2 ) is 1.59 ⁇ ⁇ S a /( ⁇ a ⁇ L a 2 ) ⁇ or less, even more preferable that it is 1.52 ⁇ ⁇ S a /( ⁇ a ⁇ L a 2 ) ⁇ or less, and particularly preferable that it is 1.43 ⁇ ⁇ S a /( ⁇ a ⁇ L a 2 ) ⁇ or less.
  • the base material 1 can directly or indirectly support the pseudo sheet structure 2.
  • the base material 1 is not necessarily required.
  • the base material 1 is a member that is provided as necessary.
  • Examples of the substrate 1 include a resin film, paper, a nonwoven fabric, a cloth, and a glass film.
  • the substrate 1 may be transparent or may have visibility. In this way, the wiring sheet 100 can be made transparent or have visibility.
  • the substrate 1 may also have elasticity. For example, if the substrate 1 has elasticity, the elasticity of the wiring sheet 100 can be ensured even when the pseudo sheet structure 2 is provided on the substrate 1.
  • the substrate 1 may be a resin film, a nonwoven fabric, a cloth, or the like.
  • resin films examples include polyethylene films, polypropylene films, polybutene films, polybutadiene films, polymethylpentene films, polyvinyl chloride films, vinyl chloride copolymer films, polyethylene terephthalate films, polyethylene naphthalate films, polybutylene terephthalate films, polyurethane films, ethylene-vinyl acetate copolymer films, ionomer resin films, ethylene-(meth)acrylic acid copolymer films, polystyrene films, polycarbonate films, and polyimide films.
  • stretchable substrates include crosslinked films and laminated films of these.
  • nonwoven fabrics include spunbond nonwoven fabrics, needle punch nonwoven fabrics, melt blown nonwoven fabrics, and spunlace nonwoven fabrics.
  • cloth include woven fabrics and knitted fabrics.
  • the paper, nonwoven fabric, and cloth as the stretchable substrate are not limited to these.
  • the thickness of the substrate 1 is preferably 10 ⁇ m or more and 10 mm or less, more preferably 15 ⁇ m or more and 5 mm or less, and even more preferably 50 ⁇ m or more and 3 mm or less.
  • the pseudo sheet structure 2 has a structure in which a plurality of conductive linear bodies 21 are arranged at intervals from each other.
  • the pseudo sheet structure 2 also has a structure in which a plurality of conductive linear bodies 21 are arranged in a direction intersecting the axial direction of the conductive linear bodies 21.
  • the conductive linear body 21 may be linear in a plan view of the wiring sheet 100, but may also be wavy.
  • Examples of the wave shape include a sine wave, a rectangular wave, a triangular wave, and a sawtooth wave.
  • breakage of the conductive linear body 21 can be suppressed when the wiring sheet 100 is stretched in the axial direction of the conductive linear body 21.
  • the volume resistivity of the conductive linear body 21 is preferably 1.0 ⁇ 10 ⁇ 9 ⁇ m or more and 1.0 ⁇ 10 ⁇ 3 ⁇ m or less, and more preferably 1.0 ⁇ 10 ⁇ 8 ⁇ m or more and 1.0 ⁇ 10 ⁇ 4 ⁇ m or less.
  • the volume resistivity of the conductive linear body 21 was measured as follows: Silver paste was applied to the ends of the conductive linear body 21 and to a portion 40 mm from the ends, and the resistance of the ends and the portion 40 mm from the ends was measured. The volume resistivity of the conductive linear body 21 was then calculated by multiplying the resistance value by the cross-sectional area (unit: m2 ) of the conductive linear body 21 and dividing the obtained value by the measured length (0.04 m).
  • the cross-sectional shape of the conductive linear body 21 is not particularly limited, and may be polygonal, flat, elliptical, circular, or the like. From the standpoint of compatibility with the resin layer 3, etc., it is preferable that the cross-sectional shape of the conductive linear body 21 is elliptical or circular.
  • the thickness (diameter) D (see FIG. 2 ) of the conductive linear body 21 is preferably 3 ⁇ m or more and 200 ⁇ m or less.
  • the diameter D of the conductive linear body 21 is more preferably 4 ⁇ m or more and 150 ⁇ m or less, and further preferably 5 ⁇ m or more and 100 ⁇ m or less.
  • the cross section of the conductive linear body 21 is elliptical, it is preferable that the major axis is in the same range as the diameter D described above.
  • the diameter D of the conductive linear body 21 is determined by observing the conductive linear body 21 using a digital microscope, measuring the diameter of the conductive linear body 21 at five randomly selected points, and averaging the measured values.
  • the interval L (see FIG. 2) between the conductive linear members 21 is preferably 0.3 mm or more and 50 mm or less, more preferably 0.5 mm or more and 30 mm or less, and even more preferably 0.8 mm or more and 20 mm or less. If the spacing between the conductive linear bodies 21 is within the above range, the conductive linear bodies are relatively densely packed, which improves the functionality of the wiring sheet 100, such as maintaining a low resistance of the pseudo sheet structure.
  • the distance L between the conductive linear members 21 is measured, for example, by observing the conductive linear members 21 of the pseudo sheet structure 2 using a digital microscope and measuring the distance between two adjacent conductive linear members 21.
  • the interval between two adjacent conductive linear bodies 21 is the length along the direction in which the conductive linear bodies 21 are arranged, and is the length between opposing portions of the two conductive linear bodies 21 (see FIG. 2).
  • the interval L is the average value of the intervals between all adjacent conductive linear bodies 21.
  • the conductive linear body 21 may be any form, but may be a linear body including a metal wire (hereinafter also referred to as a "metal wire linear body").
  • Metal wire has high thermal conductivity, high electrical conductivity, and high handling properties.
  • the metal wire linear body can greatly reduce resistance, and even if the diameter of the metal wire linear body is extremely small, it can pass a current required for heating the wiring sheet 100. This makes it possible to make the conductive linear body 21 less visible. That is, when a metal wire linear body is used as the conductive linear body 21, the resistance value of the pseudo sheet structure 2 is reduced while the light transmittance is easily improved. In addition, the wiring sheet 100 is easily able to generate heat quickly. Furthermore, as described above, a linear body having a small diameter is easily obtained.
  • examples of the conductive linear body 21 include a linear body made of a thread with a conductive coating, in addition to a metallic wire linear body.
  • the metal wire linear body may be a linear body made of a single metal wire, or may be a linear body made of a plurality of twisted metal wires.
  • metal wires include wires containing metals such as copper, aluminum, tungsten, iron, molybdenum, nickel, titanium, silver, and gold, or alloys containing two or more metals (e.g., steels such as stainless steel and carbon steel, brass, phosphor bronze, zirconium copper alloys, beryllium copper, iron nickel, nichrome, nickel titanium, Kanthal, Hastelloy, and rhenium tungsten).
  • the metal wire may be plated with gold, tin, zinc, silver, nickel, chromium, nickel chromium alloys, or solder, or may be coated with a carbon material or polymer, which will be described later.
  • wires containing one or more metals selected from tungsten and molybdenum, and alloys containing these, are preferred from the viewpoint of low volume resistivity.
  • the metal wire may be 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 less noticeable. In addition, when the metal wire is coated with a carbon material, metal corrosion is also suppressed.
  • Examples of the carbon material that coats the metal wire include amorphous carbon (for example, carbon black, activated carbon, hard carbon, soft carbon, mesoporous carbon, and carbon fiber), graphite, fullerene, graphene, and carbon nanotubes.
  • amorphous carbon for example, carbon black, activated carbon, hard carbon, soft carbon, mesoporous carbon, and carbon fiber
  • graphite fullerene
  • graphene and carbon nanotubes.
  • the material of the conductive linear bodies 21 contains tungsten, and that at least one of the conductive linear bodies 21 has a surface layer material different from that of the other one. With such a combination, it is easy to produce a wiring sheet 100 that can suppress overheating within the sheet plane.
  • the conductive linear body 21 may be a linear body in which a thread is provided with a conductive coating.
  • the conductive coating include threads spun from resins such as nylon or polyester.
  • the conductive coating include threads such as metal fibers, carbon fibers, or ion-conductive polymer fibers.
  • the conductive coating include coatings of metals, conductive polymers, or carbon materials.
  • the conductive coating can be formed by plating, vapor deposition, or the like.
  • a linear body having a conductive coating applied to the thread can improve the conductivity of the linear body while maintaining the flexibility of the thread. In other words, it becomes easier to reduce the resistance of the pseudo sheet structure 2.
  • the resin layer 3 is a layer containing resin.
  • the pseudo sheet structure 2 can be supported directly or indirectly by this resin layer 3.
  • the resin layer 3 is not necessarily provided.
  • the resin layer 3 is a member that is provided as necessary.
  • the resin layer 3 is preferably a layer containing an adhesive. For example, when forming the pseudo sheet structure 2 on the resin layer 3, the adhesive makes it easy to attach the conductive linear body 21 to the resin layer 3.
  • the resin layer 3 may be a layer made of a resin that can be dried or cured. This provides the resin layer 3 with sufficient hardness to protect the pseudo-sheet structure 2, and the resin layer 3 also functions as a protective film. In addition, the resin layer 3 after curing or drying has impact resistance, and can also suppress deformation of the wiring sheet 100 due to impact.
  • the resin layer 3 is preferably energy ray curable, such as ultraviolet light, visible energy rays, infrared rays, or electron beams, since it can be easily cured in a short time.
  • energy ray curing also includes heat curing by heating using energy rays.
  • the adhesive contained in the resin layer 3 may be a thermosetting adhesive that hardens when heated, a so-called heat seal type adhesive that bonds when heated, or an adhesive that becomes sticky when moistened.
  • the resin layer 3 is energy ray curable.
  • energy ray curable resins include compounds that have at least one polymerizable double bond in the molecule, and acrylate compounds that have a (meth)acryloyl group are preferred.
  • the acrylate-based compounds include, for example, (meth)acrylates containing a chain aliphatic skeleton (trimethylolpropane tri(meth)acrylate, tetramethylolmethane tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol monohydroxypenta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,4-butylene glycol di(meth)acrylate, and 1,6-hexanediol di(meth)acrylate.
  • (meth)acrylates containing a chain aliphatic skeleton trimethylolpropane tri(meth)acrylate, tetramethylolmethane tetra(meth)acrylate, pentaerythritol tri(meth)acrylate,
  • acrylates, etc. alicyclic skeleton-containing (meth)acrylates (dicyclopentanyl di(meth)acrylate, dicyclopentadiene di(meth)acrylate, etc.), polyalkylene glycol (meth)acrylates (polyethylene glycol di(meth)acrylate, etc.), oligoester (meth)acrylates, urethane (meth)acrylate oligomers, epoxy-modified (meth)acrylates, polyether (meth)acrylates other than the polyalkylene glycol (meth)acrylates, and itaconic acid oligomers.
  • the weight average molecular weight (Mw) of the energy ray curable resin is preferably 100 or more and 30,000 or less, and more preferably 300 or more and 10,000 or less.
  • the adhesive composition may contain only one type of energy ray-curable resin, or two or more types, and when two or more types are contained, the combination and ratio of these may be selected as desired. Furthermore, the adhesive composition may be combined with a thermoplastic resin, which will be described later, and the combination and ratio may be selected as desired.
  • the resin layer 3 may be an adhesive layer formed from an adhesive (pressure-sensitive adhesive).
  • the adhesive of the adhesive layer is not particularly limited.
  • adhesives include acrylic adhesives, urethane adhesives, rubber adhesives, polyester adhesives, silicone adhesives, and polyvinyl ether adhesives.
  • the adhesive is at least one selected from the group consisting of acrylic adhesives, urethane adhesives, and rubber adhesives, and it is more preferable that the adhesive is an acrylic adhesive.
  • Acrylic adhesives include, for example, polymers containing structural units derived from alkyl (meth)acrylates having a straight-chain alkyl group or a branched-chain alkyl group (i.e., polymers obtained by polymerizing at least alkyl (meth)acrylates), and acrylic polymers containing structural units derived from (meth)acrylates having a cyclic structure (i.e., polymers obtained by polymerizing at least (meth)acrylates having a cyclic structure).
  • (meth)acrylate is used as a term that refers to both "acrylate” and "methacrylate,” and the same applies to other similar terms.
  • 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.
  • crosslinking agents include known epoxy crosslinking agents, isocyanate crosslinking agents, aziridine crosslinking agents, and metal chelate crosslinking agents.
  • a hydroxyl group or a carboxyl group that reacts with these crosslinking agents can be introduced into the acrylic copolymer as a functional group derived from the monomer component of the acrylic polymer.
  • the resin layer 3 may further contain the energy ray curable resin described above in addition to the adhesive.
  • an acrylic adhesive is used as the adhesive, a compound having both a functional group that reacts with a functional group derived from a monomer component in an acrylic copolymer and an energy ray polymerizable functional group in one molecule may be used as the energy ray curable component.
  • the reaction between the functional group of the compound and the functional group derived from a monomer component in the acrylic copolymer makes the side chain of the acrylic copolymer curable by energy ray irradiation.
  • a component whose side chain is similarly energy ray polymerizable may be used as a polymer component other than the acrylic polymer.
  • thermosetting resin used in the resin layer 3 is not particularly limited, and specific examples include epoxy resin, phenol resin, melamine resin, urea resin, polyester resin, urethane resin, acrylic resin, benzoxazine resin, phenoxy resin, amine-based compounds, and acid anhydride-based compounds. These can be used alone or in combination of two or more.
  • epoxy resin from the viewpoint of suitability for curing using an imidazole-based curing catalyst, it is preferable to use epoxy resin, phenol resin, melamine resin, urea resin, amine-based compounds, and acid anhydride-based compounds, and in particular, from the viewpoint of showing excellent curing properties, it is preferable to use epoxy resin, phenol resin, a mixture thereof, or a mixture of epoxy resin and at least one selected from the group consisting of phenol resin, melamine resin, urea resin, amine-based compounds, and acid anhydride-based compounds.
  • the moisture-curing resin used in the resin layer 3 is not particularly limited, but examples include moisture-curing urethane resin, which is a resin in which isocyanate groups are generated by moisture, and modified silicone resin.
  • an energy ray curable resin is used as the resin used in the resin layer 3, it is preferable to use a photopolymerization initiator or the like. Furthermore, when a thermosetting resin is used as the resin used in the resin layer 3, it is preferable to use a thermal polymerization initiator or the like. By using a photopolymerization initiator, a thermal polymerization initiator, or the like in the resin layer 3, a crosslinked structure is formed in the resin layer 3, making it possible to more firmly protect the pseudo sheet structure 2.
  • Photopolymerization initiators include benzophenone, acetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin benzoic acid, benzoin methyl benzoate, benzoin dimethyl ketal, 2,4-diethylthioxanthone, 1-hydroxycyclohexyl phenyl ketone, benzyl diphenyl sulfide, tetramethylthiuram monosulfide, azobisisobutyronitrile, 2-chloroanthraquinone, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, and bis(2,4,6-trimethylbenzoyl)-phenyl-phosphine oxide.
  • Thermal polymerization initiators include hydrogen peroxide, peroxodisulfates (ammonium peroxodisulfate, sodium peroxodisulfate, potassium peroxodisulfate, etc.), azo compounds (2,2'-azobis(2-amidinopropane) dihydrochloride, 4,4'-azobis(4-cyanovaleric acid), 2,2'-azobisisobutyronitrile, 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile), etc.), and organic peroxides (benzoyl peroxide, lauroyl peroxide, peracetic acid, persuccinic acid, di-t-butyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, etc.).
  • polymerization initiators may be used alone or in combination of two or more.
  • the amount used is preferably 0.1 parts by mass or more and 100 parts by mass or less, more preferably 1 part by mass or more and 100 parts by mass or less, and even more preferably 1 part by mass or more and 10 parts by mass or less, relative to 100 parts by mass of at least any one of the energy ray curable resin and the thermosetting resin.
  • the resin layer 3 may not be curable, and may be, for example, a layer made of a thermoplastic resin composition.
  • the thermoplastic resin layer can be softened by including a solvent in the thermoplastic resin composition. This makes it easier to attach the conductive linear body 21 to the resin layer 3, for example, when forming the pseudo-sheet structure 2 on the resin layer 3.
  • the thermoplastic resin layer can be dried and solidified by volatilizing the solvent in the thermoplastic resin composition.
  • thermoplastic resin examples include polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, polyether, polyethersulfone, polyimide, and acrylic resin.
  • solvent examples include alcohol-based solvents, ketone-based solvents, ester-based solvents, ether-based solvents, hydrocarbon-based solvents, alkyl halide solvents, and water.
  • the resin layer 3 may contain an inorganic filler. By containing an inorganic filler, the hardness of the resin layer 3 after curing can be further improved.
  • inorganic fillers examples include inorganic powders (e.g., powders of silica, alumina, talc, calcium carbonate, titanium white, red iron oxide, silicon carbide, and boron nitride), beads made by spheroidizing inorganic powders, single crystal fibers, and glass fibers.
  • silica filler and alumina filler are preferred as inorganic fillers.
  • One type of inorganic filler may be used alone, or two or more types may be used in combination.
  • the resin layer 3 may contain other components.
  • other components include well-known additives such as organic solvents, flame retardants, tackifiers, UV absorbers, antioxidants, preservatives, antifungal agents, plasticizers, defoamers, and wettability adjusters.
  • the thickness of the resin layer 3 is determined according to the application of the wiring sheet 100.
  • the thickness of the resin layer 3 is preferably 3 ⁇ m or more and 150 ⁇ m or less, and more preferably 5 ⁇ m or more and 100 ⁇ m or less.
  • the electrodes 4 are used to supply a current to the conductive linear body 21.
  • the electrodes 4 are in a pair.
  • the electrodes 4 are in direct contact with the conductive linear body 21.
  • the electrodes 4 are disposed so as to be electrically connected to both ends of the conductive linear body 21.
  • the electrode 4 can be formed using a known electrode material. Examples of the electrode material include a conductive paste (such as silver paste), a metal foil (such as copper foil), and a metal wire.
  • the electrode material is a metal wire, the number of metal wires may be one, but is preferably two or more.
  • the electrodes 4 have an irregular shape in a plan view and are not parallel. For example, as shown in Fig.
  • the electrodes 4 have an irregular shape, and at least one of the conductive linear bodies 21 has a different distance between the contact points of the conductive linear body 21 and the electrode 4 from the other conductive linear bodies 21.
  • Such an electrode 4 is easy to fabricate by using a conductive paste.
  • the metal of the metal foil or metal wire examples include copper, aluminum, tungsten, iron, molybdenum, nickel, titanium, silver, and gold, or alloys containing two or more metals (for example, steels such as stainless steel and carbon steel, brass, phosphor bronze, zirconium copper alloy, beryllium copper, iron nickel, nichrome, nickel titanium, Kanthal, Hastelloy, and rhenium tungsten, etc.).
  • the metal foil or metal wire may also be plated with gold, tin, zinc, silver, nickel, chromium, nickel chromium alloy, solder, etc.
  • the width of at least one of the electrodes 4 is preferably 10 mm or less, more preferably 3000 ⁇ m or less, and even more preferably 1500 ⁇ m or less, in a plan view of the wiring sheet 100.
  • the width of this electrode is preferably 0.1 mm or more. Note that if at least one of the electrodes is a metal wire, the width of the electrode is the diameter of the metal wire, and when two or more metal wires are used, the width of one electrode refers to the sum of the diameters of the metal wires.
  • the thickness of the electrode 4 is preferably 2 ⁇ m or more and 200 ⁇ m or less, more preferably 5 ⁇ m or more and 170 ⁇ m or less, and even more preferably 10 ⁇ m or more and 150 ⁇ m or less. If the thickness of the electrode 4 is within the above range, the electrical conductivity is high and the resistance is low, and the resistance value with the pseudo-sheet structure can be kept low. In addition, sufficient strength as an electrode is obtained. Note that, when the electrode is a metal wire, the thickness of the electrode is the diameter of the metal wire.
  • the wiring sheet 100 can be produced, for example, by the following steps. First, a composition for forming the resin layer 3 is applied onto the substrate 1 to form a coating film. Next, the coating film is dried to prepare the resin layer 3. Next, the conductive linear bodies 21 are arranged on the resin layer 3 to form the pseudo sheet structure 2. For example, in a state where the resin layer 3 with the substrate 1 is arranged on the outer circumferential surface of the drum member, the conductive linear bodies 21 are wound around the resin layer 3 while rotating the drum member.
  • At least one of the conductive linear bodies 21 is different from the other one in at least one of the material, the surface layer material, the diameter, and the wavy shape in a plan view. Then, the bundle of the wound conductive linear bodies 21 is cut along the axial direction of the drum member. This forms the pseudo sheet structure 2 and is placed on the resin layer 3. Then, the resin layer 3 with the substrate 1 on which the pseudo sheet structure 2 is formed is taken out from the drum member to obtain a sheet-like conductive member. According to this method, for example, it is easy to adjust the spacing L between adjacent conductive linear bodies 21 in the pseudo sheet structure 2 by rotating the drum member and moving the payout portion of the conductive linear body 21 along a direction parallel to the axis of the drum member.
  • electrodes 4 are formed on both ends of the conductive linear members 21 in the pseudo sheet structure 2 of the sheet-like conductive member.
  • the electrodes 4 are formed so as to have an irregular shape in a plan view. In this manner, the wiring sheet 100 can be produced.
  • the wiring sheet 100A includes a substrate 1, a pseudo sheet structure 2, a resin layer 3, and a pair of electrodes 4.
  • the wiring sheet 100A includes the resin layer 3 laminated on the substrate 1, and the pseudo sheet structure 2 laminated on the resin layer 3.
  • the pseudo sheet structure 2 includes a plurality of conductive linear members 21 arranged at intervals. At least one of the conductive linear bodies 21 is different from the other one in at least one of the material, surface layer material, diameter, and wavy shape in plan view. Specifically, as shown in Fig. 4 and Fig. 5, two types of conductive linear bodies 21 having different diameters are arranged alternately with a periodicity.
  • wiring sheet 100A according to the present embodiment increases the degree of freedom in design is as follows. That is, in the case of using a single type of conductive linear body 21 as in the past, the resistance value of the pseudo sheet structure 2 was adjusted by changing the material, surface layer material, diameter, etc. of the conductive linear body 21 itself, or by changing the number of conductive linear bodies 21. However, since the types of conductive linear body 21 are limited, it was difficult to adjust the resistance value to the desired value. In contrast, in the present embodiment, the resistance value of the pseudo sheet structure 2 can be adjusted by using, for example, two types of conductive linear body 21 in half each.
  • the resistance value of the pseudo sheet structure 2 can be adjusted by using, for example, two types of conductive linear body 21 in a ratio of 2:1. In this way, by simply using two types of conductive linear body 21, the resistance value of the pseudo sheet structure 2 can be adjusted more freely. Note that if the two types of conductive linear body 21 are arranged with a periodicity, there is almost no problem with the appearance of the wiring sheet 100A. In this way, the degree of freedom in design is increased.
  • the conductive linear objects 21 may be made of different materials.
  • the resistance value per unit length of the conductive linear body 21 can be changed depending on the material by changing the material. For example, the higher the volume resistivity of a material used, the higher the resistance value per unit length of the conductive linear body 21.
  • the surface layer materials of any of the conductive linear bodies 21 may be different from each other.
  • the resistance value per unit length of the conductive linear body 21 can be changed according to the type of surface layer material by changing the type of surface layer material. For example, the lower the volume resistivity of the surface layer material used, the lower the resistance value per unit length of the conductive linear body 21.
  • the diameters of any of the conductive linear objects 21 may be different. Since changing the diameter changes the cross-sectional area, the resistance value per unit length of the conductive linear body 21 can be changed according to the diameter. For example, the larger the diameter of the conductive linear body 21, the lower the resistance value per unit length of the conductive linear body 21.
  • the wavy shape in a plan view may be different between any two adjacent conductive linear objects 21 .
  • the resistance value of the conductive linear body 21 between the electrodes 4 can be changed according to the waveform, wavelength, amplitude, etc., because changing the wave shape (waveform, wavelength, amplitude, etc.) in a plan view changes the length of the conductive linear body 21. For example, the shorter the wavelength and the larger the amplitude, the higher the resistance value of the conductive linear body 21 between the electrodes 4.
  • At least one of the material, surface material, diameter, and wavy shape in plan view of the conductive linear body 21 may be adjusted as appropriate. Two or more of these may also be adjusted in combination.
  • the conductive linear members 21 are of three or more types, and it is preferable that the three or more types of conductive linear members are arranged periodically. In this way, the degree of freedom in design can be further increased by using three or more types of conductive linear bodies 21. Furthermore, by arranging conductive linear bodies 21 with a periodicity, there is almost no problem with the appearance of wiring sheet 100.
  • one type of the three or more types of conductive linear bodies 21 has a material or surface layer material different from the other types, and that the spacing L between the conductive linear bodies 21 is 2.0 mm or less.
  • the resistance value of the conductive linear body 21 itself can be changed considerably.
  • one type of material is carbon nanotubes and the other type of material is metal
  • the difference in resistance value between carbon nanotubes and metal is considerably large, so that the conductive linear body 21 made of carbon nanotubes generates almost no heat when a current is passed through the wiring sheet 100. In this way, a pseudo sheet structure 2 having dummy conductive linear bodies 21 that generate almost no heat can be obtained.
  • the number of conductive linear bodies 21 can also be increased without changing the resistance value of the pseudo sheet structure 2 as a whole.
  • the conductive linear body 21 becomes very easy to see.
  • the interval of the conductive linear body 21 is 2.0 mm or less, there is a phenomenon that the conductive linear body 21 becomes difficult to see.
  • the interval of the conductive linear body 21 is more preferably 1.5 mm or less, and particularly preferably 1.0 mm or less.
  • the conductive linear body 21 is difficult to see, and in this case, it is also said that the visibility of the conductive linear body 21 is good.
  • the number of the conductive linear body 21 can be increased and the interval of the conductive linear body 21 can be adjusted without changing the resistance value of the pseudo sheet structure 2. Therefore, the conductive linear body 21 can be made difficult to see without changing the resistance value of the pseudo sheet structure 2.
  • the interval L between the conductive linear members 21 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and particularly preferably 0.3 mm or more.
  • the distance L between the conductive linear members 21 is measured, for example, by observing the conductive linear members 21 of the pseudo sheet structure 2 using a digital microscope and measuring the distance between two adjacent conductive linear members 21.
  • the interval between two adjacent conductive linear bodies 21 is the length along the direction in which the conductive linear bodies 21 are arranged, and is the length between opposing portions of the two conductive linear bodies 21 (see FIG. 2).
  • the interval L is the average value of the intervals between all adjacent conductive linear bodies 21.
  • the substrate 1, pseudo sheet structure 2, resin layer 3, and electrode 4 are as described above.
  • the method for manufacturing the wiring sheet 100A is the same as the method for manufacturing the wiring sheet 100 described above.
  • the following advantageous effects can be obtained.
  • (3) by using two or more types of conductive linear bodies 21 that differ in at least one of the material, surface material, diameter, and wavy shape in a planar view, the resistance value of the pseudo sheet structure 2 can be adjusted more freely.
  • the wiring sheet 100A according to the present embodiment has a high degree of freedom in design and can be suitably used as a sheet-type heater.
  • the wiring sheet 100 includes the base material 1, but is not limited thereto.
  • the wiring sheet 100 does not need to include the base material 1.
  • the wiring sheet 100 can be used by being attached to an adherend by the resin layer 3.
  • wiring sheet 100 includes resin layer 3, but is not limited to this.
  • wiring sheet 100 does not need to include resin layer 3.
  • a knitted fabric may be used as substrate 1, and conductive linear members 21 may be woven into substrate 1 to form pseudo sheet structure 2.
  • the present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples in any way.
  • the sheet heaters obtained in the examples were evaluated as follows. [Evaluation of temperature distribution within the sheet plane] At an ambient temperature of 23° C., a current was passed through the sheet heater to generate heat so that the minimum temperature within the surface of the sheet heater reached approximately 33° C. After that, the temperature distribution of the multiple conductive linear bodies was measured from a position 150 mm from the surface of the sheet heater using a thermography camera (FLIR C2 manufactured by FLIR Systems Japan, Inc.). The emissivity was set to 0.95 for the measurements. If the difference between the maximum and minimum temperatures of each conductive linear body was 10° C. or more, the temperature distribution was judged to be "poor," and if the difference was less than 10° C., the temperature distribution was judged to be "good.”
  • Example 1-1 An adhesive sheet (300 mm x 110 mm) was wound around a rubber drum without wrinkles, with one adhesive side facing outward, and both ends in the circumferential direction were fixed with double-sided tape.
  • Various conductive linear bodies wound around a bobbin were attached to the surface of the adhesive sheet located near the end of the rubber drum, and then 10 conductive linear bodies shown in Table 1 below were simultaneously unwound at intervals of 10 mm and wound around the rubber drum.
  • the adhesive sheet was cut with the metal fine wires, and a sheet was obtained in which a pseudo-sheet structure in which the metal fine wires were arranged on the adhesive sheet was laminated.
  • a sheet-like heater was obtained by laminating an electrode sheet prepared in advance on a polycarbonate film on which silver paste ("XA-3676" manufactured by Fujikura Kasei Co., Ltd.) was printed in a predetermined shape in a plan view.
  • the silver paste electrodes were made to have a thickness of 18 ⁇ m and a width of 1 mm.
  • the shape of the electrodes in a planar view is a pair of electrodes (seagull-shaped electrodes) consisting of two semicircular arcs (5 cm in diameter) connected at the ends, facing each other with the arcs on the outside (the distance between the closest points is 6 cm, and the distance between the farthest points is 11 cm).
  • the temperature distribution in the sheet plane of the sheet heater was evaluated, and the results are shown in Table 1.
  • the length L n of the conductive linear body between the electrodes and the resistance value ⁇ n /S n per unit length of the conductive linear body are also shown in Table 1.
  • Example 1-2 A sheet-shaped heater was produced in the same manner as in Example 1-1, except that 10 conductive linear bodies shown in Table 2 below were used. The temperature distribution in the sheet plane of the sheet heater was evaluated. The results are shown in Table 2. The length between the electrodes is also shown in Table 2.
  • Examples 1-3 A sheet-type heater was produced in the same manner as in Example 1-1, except that eight conductive linear bodies as shown in Table 3 below were used, and that the pair of electrodes was formed in a V-shape in plan view (the distance between the closest parts was 6.4 cm, and the distance between the farthest parts was 9.2 cm). The temperature distribution in the sheet plane of the sheet heater was then evaluated. The results are shown in Table 3. The length L n of the conductive linear body between the electrodes and the resistance value ⁇ n /S n per unit length of the conductive linear body are also shown in Table 3.
  • Example 1-1 A sheet-type heater was produced in the same manner as in Example 1-3, except that eight conductive linear bodies shown in Table 4 below were used. The temperature distribution in the sheet plane of the sheet heater was then evaluated. The results are shown in Table 4. The length L n of the conductive linear body between the electrodes and the resistance value ⁇ n /S n per unit length of the conductive linear body are also shown in Table 4.
  • Examples 1-1 to 1-3 show that when at least one of the conductive linear bodies was different from the other one in at least one of the following characteristics: material, surface material, diameter, and wavy shape in plan view (Examples 1-1 to 1-3), the temperature distribution in the sheet plane was good. In contrast, when only the same conductive linear body was used (Comparative Example 1-1), the temperature distribution in the sheet plane was poor. This confirmed that the sheet heaters obtained in Examples 1-1 to 1-3 can suppress overheating in the sheet plane even when the pair of electrodes are not parallel.
  • Example 2-1 An adhesive sheet (140 mm x 100 mm) was wound around a rubber drum without wrinkles, with one adhesive side facing outward, and both ends in the circumferential direction were fixed with double-sided tape.
  • Various conductive linear bodies wound around a bobbin were attached to the surface of the adhesive sheet located near the end of the rubber drum, and then wound around the rubber drum while unwinding the conductive linear bodies in the following arrangement so that the intervals were 2 mm, and the rubber drum was gradually moved in a direction parallel to the drum axis so that the conductive linear bodies were wound around the rubber drum while drawing a spiral at regular intervals.
  • the adhesive sheet was cut along with the conductive linear bodies parallel to the drum axis to obtain a sheet in which a pseudo-sheet structure in which conductive linear bodies were arranged was laminated on the adhesive sheet. Thereafter, the conductive linear bodies were attached to an electrode sheet prepared in advance, which was made of a polycarbonate film printed with silver paste ("XA-3676" manufactured by Fujikura Kasei Co., Ltd.), so that the number of conductive linear bodies was 10, to obtain a sheet-like heater.
  • the silver paste electrodes were fabricated to have a thickness of 18 ⁇ m, a width of 5 mm, and an inter-electrode distance of 120 mm.
  • First wire Tungsten wire, diameter 9 ⁇ m, resistance per unit length 10.5 ⁇ /cm
  • Second wire tungsten wire, diameter 11 ⁇ m, resistance per unit length 7.1 ⁇ /cm
  • Example 2-2 A sheet-type heater was produced in the same manner as in Example 2-1, except that the conductive linear bodies were arranged as follows: (Arrangement of Conductive Linear Bodies) Repeat from the first to fifth wires as follows: 1st wire: Tungsten wire, diameter 8 ⁇ m, resistance per unit length 13.3 ⁇ /cm - Second wire: tungsten wire, diameter 8 ⁇ m, resistance per unit length 13.3 ⁇ /cm - 3rd wire: Silver-plated rhenium tungsten wire, diameter 14 ⁇ m, resistance per unit length 5.2 ⁇ /cm 4th wire: tungsten wire, diameter 8 ⁇ m, resistance per unit length 13.3 ⁇ /cm 5th wire: Silver-plated rhenium tungsten wire, diameter 14 ⁇ m, resistance per unit length 5.2 ⁇ /cm
  • Example 2-3 A sheet-type heater was produced in the same manner as in Example 2-1, except that the conductive linear bodies were arranged as follows: (Arrangement of Conductive Linear Bodies) 1st to 4th wires: gold-plated tungsten wire, diameter 10 ⁇ m, resistance per unit length 7.7 ⁇ /cm ⁇ 5th and 6th wires: gold-plated tungsten wire, diameter 8 ⁇ m, resistance per unit length 12.5 ⁇ /cm 7th to 10th wires: gold-plated tungsten wire, diameter 10 ⁇ m, resistance per unit length 7.7 ⁇ /cm In addition, by arranging a conductive linear body with high resistivity in the center as in this sheet heater, it is possible to reduce uneven heating at high temperatures.
  • the central part may be affected by the surrounding heated parts and may become overheated.
  • Example 2-4 A sheet-type heater was produced in the same manner as in Example 2-1, except that the conductive linear bodies were arranged as follows: (Arrangement of Conductive Linear Bodies) 1st to 9th wires: gold-plated tungsten wire, diameter 10 ⁇ m, resistance per unit length 7.7 ⁇ /cm 10th wire: gold-plated tungsten wire, diameter 8 ⁇ m, resistance per unit length 12.5 ⁇ /cm.
  • conductive linear bodies with high resistivity at the ends as in this sheet heater, uneven heating at low temperatures can be reduced.
  • the approach as in Example 3 is not necessary, and it is preferable to arrange conductive linear bodies with high resistance at the ends.
  • the center can be sufficiently heated, and by arranging conductive linear bodies for adjusting the resistance at the ends that are not required as heating areas, it is possible to control the total resistance of the entire heater and the temperature distribution of the heating areas.
  • Example 2-5 A sheet-type heater was produced in the same manner as in Example 2-1, except that the conductive linear bodies were arranged as follows: (Arrangement of Conductive Linear Bodies) Repeat of the first and second wires below: First wire: Tungsten wire, diameter 11 ⁇ m, resistance per unit length 7.1 ⁇ /cm - Second wire: Tungsten wire, diameter 11 ⁇ m, resistance per unit length 7.1 ⁇ /cm, wavy shape in plan view (sine wave with wavelength 5 mm and total amplitude 2 mm)
  • Example 2-6 A sheet-type heater was fabricated in the same manner as in Example 1, except that the conductive linear bodies were arranged as shown below, the intervals between the conductive linear bodies were 1 mm, and the number of the conductive linear bodies was 20. (Arrangement of the conductive linear bodies) Repeat the following from the first to fourth wires: 1st wire: tungsten wire, diameter 9 ⁇ m, resistance per unit length 10.5 ⁇ /cm - 2nd: CNT yarn, diameter 10 ⁇ m, resistance per unit length 450 ⁇ /cm - Third wire: tungsten wire, diameter 11 ⁇ m, resistance per unit length 7.1 ⁇ /cm 4th: CNT yarn, diameter 10 ⁇ m, resistance per unit length 450 ⁇ /cm
  • Example 2-1 A sheet-shaped heater was produced in the same manner as in Example 2-1, except that only one type of conductive linear body (material: tungsten, diameter: 11 ⁇ m, resistance per unit length: 7.1 ⁇ /cm) was used.
  • Example 2-2 A sheet-shaped heater was produced in the same manner as in Example 2-1, except that only one type of conductive linear body (material: tungsten, diameter: 9 ⁇ m, resistance per unit length: 10.5 ⁇ /cm) was used.
  • Example 2-1 to 2-6 show that when at least one of the conductive linear bodies differed from the other one in at least one of the following characteristics (material, surface material, diameter, and wavy shape in plan view) (Examples 2-1 to 2-6), the resistance value of the sheet-type heater could be made closer to the target value compared to when only the same conductive linear bodies were used (Comparative Examples 2-1 and 2-2). This confirmed that the sheet-type heaters obtained in Examples 2-1 to 2-6 have a high degree of freedom in design.

Landscapes

  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une feuille de câblage (100) comprenant une structure de pseudo-feuille (2) dans laquelle une pluralité de corps linéaires électroconducteurs (21) sont disposés avec des espaces entre eux, et une paire d'électrodes (4), au moins un des corps linéaires électroconducteurs (21) étant tel que la distance entre les points de contact d'un corps linéaire électroconducteur (21) et les électrodes (4) est différente de celle d'un autre corps linéaire électroconducteur (21), et au moins un des corps linéaires électroconducteurs (21) est tel qu'au moins un élément parmi la qualité des matériaux, le matériau de couche de surface, le diamètre et la forme d'onde en vue de dessus est différent de celui d'un autre corps linéaire électroconducteur (21).
PCT/JP2023/033466 2022-09-30 2023-09-13 Feuille de câblage et élément chauffant en forme de feuille WO2024070718A1 (fr)

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JP2022158949A JP2024052310A (ja) 2022-09-30 2022-09-30 配線シート及びシート状ヒータ
JP2022-158993 2022-09-30
JP2022158993A JP2024052337A (ja) 2022-09-30 2022-09-30 配線シート及びシート状ヒータ
JP2022-158949 2022-09-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0362492A (ja) * 1989-07-28 1991-03-18 Unitika Ltd 透明面状発熱体
JP2014160633A (ja) * 2013-02-19 2014-09-04 Sanko Name Co Ltd 電力面密度一定の形状構造をもつ導電膜ヒータ
JP2016201343A (ja) * 2015-04-07 2016-12-01 フィグラ株式会社 Ｌｅｄ信号機用発熱ガラス
WO2021187361A1 (fr) * 2020-03-19 2021-09-23 リンテック株式会社 Feuille de câblage et élément chauffant en forme de feuille
WO2021192775A1 (fr) * 2020-03-23 2021-09-30 リンテック株式会社 Feuille de câblage et élément chauffant du type feuille

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0362492A (ja) * 1989-07-28 1991-03-18 Unitika Ltd 透明面状発熱体
JP2014160633A (ja) * 2013-02-19 2014-09-04 Sanko Name Co Ltd 電力面密度一定の形状構造をもつ導電膜ヒータ
JP2016201343A (ja) * 2015-04-07 2016-12-01 フィグラ株式会社 Ｌｅｄ信号機用発熱ガラス
WO2021187361A1 (fr) * 2020-03-19 2021-09-23 リンテック株式会社 Feuille de câblage et élément chauffant en forme de feuille
WO2021192775A1 (fr) * 2020-03-23 2021-09-30 リンテック株式会社 Feuille de câblage et élément chauffant du type feuille

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