WO2023080112A1 - シート状ヒータ - Google Patents

シート状ヒータ Download PDF

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Publication number
WO2023080112A1
WO2023080112A1 PCT/JP2022/040715 JP2022040715W WO2023080112A1 WO 2023080112 A1 WO2023080112 A1 WO 2023080112A1 JP 2022040715 W JP2022040715 W JP 2022040715W WO 2023080112 A1 WO2023080112 A1 WO 2023080112A1
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WO
WIPO (PCT)
Prior art keywords
sheet
conductive linear
linear body
conductive
resin layer
Prior art date
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Ceased
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PCT/JP2022/040715
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English (en)
French (fr)
Japanese (ja)
Inventor
雅春 伊藤
孝至 森岡
拓也 大嶋
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Lintec Corp
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Lintec Corp
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Priority to JP2023558029A priority Critical patent/JPWO2023080112A1/ja
Publication of WO2023080112A1 publication Critical patent/WO2023080112A1/ja
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material

Definitions

  • the present invention relates to sheet heaters.
  • Sheet-shaped heaters are used for various purposes, and there are cases where it is required to control the temperature of the sheet-shaped heater.
  • a method comprising placing to obtain a modified heated transparent window is described.
  • Patent Document 2 describes a heater device including a heater body having a planar heat-generating surface and a thermal fuse disposed on the heater body and having a contact portion that makes surface contact with the heat-generating surface. .
  • An object of the present invention is to provide a sheet heater which has a simple structure and whose temperature can be controlled.
  • the average interval between the conductive linear bodies is 15 mm or less.
  • the single metal element is the group consisting of tungsten, molybdenum, copper, nickel, iron, gold, silver, titanium, and aluminum.
  • a sheet heater comprising at least one metal element selected from
  • FIG. 1 is a schematic diagram showing a sheet heater according to an embodiment of the present invention
  • FIG. FIG. 2 is a sectional view showing the II-II section of FIG. 1
  • It is a schematic diagram for explaining the usage method of the sheet-like heater according to the embodiment of the present invention.
  • a sheet heater 100 includes a base material 1, a pseudo sheet structure 2, a resin layer 3, a pair of electrodes 4, and a detection module 5, as shown in FIGS. ing.
  • the sheet-shaped heater 100 has the resin layer 3 laminated on the base material 1 and the pseudo sheet structure 2 laminated on the resin layer 3 .
  • the pseudo sheet structure 2 has a plurality of conductive linear bodies 21 arranged at intervals.
  • a pair of electrodes 4 are electrically connected to the conductive linear body 21 .
  • the detection module 5 can detect the resistance value of the conductive linear body 21 .
  • the conductive linear body 21 is a metal wire or a linear body obtained by coating the metal wire with a conductive coating.
  • the metal wire is made of a metal having a ratio of a single metal element of 97% by mass or more.
  • the sheet heater 100 temperature control is possible with a simple configuration as follows. That is, detection module 5 can detect the resistance value of conductive linear body 21 . Moreover, the metal wire constituting the conductive linear body 21 is made of a metal having a ratio of a single metal element of 97% by mass or more. If the conductive linear body 21 has such a structure, it has a large temperature coefficient and is suitable for temperature control. Specifically, since the temperature corresponds to the resistance value of the conductive linear body 21 on a one-to-one basis, the resistance value is calculated by obtaining the voltage with respect to the current value, or the current value with respect to the voltage. It becomes possible to estimate the temperature of the sex striatum 21 .
  • the temperature of the sheet heater 100 can be controlled by adjusting the current value or voltage value applied to the conductive linear body 21 based on the estimated temperature.
  • temperature control can be performed without separately providing a temperature sensor, a temperature fuse, or the like.
  • the substrate 1 can support the pseudo-sheet structure 2 directly or indirectly.
  • the base material 1 does not necessarily have to be provided.
  • the base material 1 is a member provided as needed.
  • Examples of the substrate 1 include resin film, paper, metal foil, nonwoven fabric, cloth, and glass film.
  • a resin film, a nonwoven fabric, a cloth, or the like can be used as the stretchable base material.
  • resin films examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polyethylene naphthalate film, polybutylene terephthalate film, Polyurethane film, ethylene vinyl acetate copolymer film, ionomer resin film, ethylene-(meth)acrylic acid copolymer film, ethylene-(meth)acrylic acid ester copolymer film, polystyrene film, polycarbonate film, polyimide film, etc. is mentioned.
  • stretchable substrates include these crosslinked films and laminated films.
  • nonwoven fabrics include spunbond nonwoven fabrics, needle-punched nonwoven fabrics, meltblown nonwoven fabrics, spunlaced nonwoven fabrics, and the like. Fabrics include, for example, woven fabrics and knitted fabrics. Paper, non-woven fabric, and cloth as stretchable substrates are not limited to these.
  • the thickness of the base material 1 is not particularly limited. The thickness of the substrate 1 is preferably 10 ⁇ m or more and 10 mm or less, more preferably 15 ⁇ m or more and 3 mm or less, and even more preferably 50 ⁇ m or more and 1.5 mm or less.
  • the pseudo sheet structure 2 has a structure in which a plurality of conductive linear bodies 21 are arranged at intervals. That is, the pseudo sheet structure 2 is a structure in which a plurality of conductive linear bodies 21 are arranged at intervals so as to form a flat surface or a curved surface.
  • the conductive linear body 21 extends in one direction and has a straight or wavy shape in a plan view of the sheet heater 100 .
  • the pseudo sheet structure 2 has a structure in which a plurality of conductive linear bodies 21 are arranged in a direction orthogonal to the axial direction of the conductive linear bodies 21 .
  • the conductive linear body 21 may have a linear shape in a plan view of the sheet heater 100, or may have a wavy shape.
  • Wave shapes include, for example, sine waves, rectangular waves, triangular waves, and sawtooth waves. If the pseudo sheet structure 2 has such a structure, disconnection of the conductive linear body 21 can be suppressed when the sheet heater 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 preferably 1.0 ⁇ 10 ⁇ 8 ⁇ m It is more preferable to be not less than 1.0 ⁇ 10 ⁇ 4 ⁇ m.
  • a method for measuring the volume resistivity of the conductive linear body 21 is as follows. A silver paste is applied to both ends of the conductive linear body 21, and the resistance of the 40 mm length from the end is measured to obtain the resistance value of the conductive linear body 21. FIG.
  • 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 measured length (0.04 m) to obtain the conductive linear body.
  • a volume resistivity of the body 21 is calculated.
  • the cross-sectional shape of the conductive linear body 21 is not particularly limited, and may be polygonal, flat, elliptical, or circular. is preferably When the cross section of conductive linear body 21 is circular, the thickness (diameter) D (see FIG. 2) of conductive linear body 21 is preferably 5 ⁇ m or more and 75 ⁇ m or less. From the viewpoints of suppressing an increase in sheet resistance and improving heat generation efficiency and dielectric breakdown resistance of the sheet heater 100, the diameter D of the conductive linear body 21 is more preferably 8 ⁇ m or more and 50 ⁇ m or less, and more preferably 10 ⁇ m or more. It is more preferably 30 ⁇ m or less, and particularly preferably 12 ⁇ m or more and 25 ⁇ m or less.
  • the conductive linear body 21 has a large heat capacity, and a temperature difference is likely to occur compared to the average temperature of the entire sheet. From the viewpoint of temperature control, it is preferable that the difference between the average temperature of the entire sheet and the temperature directly above the conductive linear members 21 is as small as possible. Therefore, the thinner the thickness (diameter) D of the conductive linear body 21, the easier the temperature control tends to be.
  • 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 obtained by observing the conductive linear body 21 of the pseudo sheet structure 2 using a digital microscope, and measuring the diameter of the conductive linear body 21 at five randomly selected locations. is measured and taken as the average value.
  • the distance L (see FIG. 2) between the conductive linear bodies 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 0.8 mm or more and 20 mm or less. is more preferable, and 2 mm or more and 15 mm or less is particularly preferable.
  • the conductive linear body 21 is arranged on the sheet plane, the temperature directly above the conductive linear body 21 becomes the highest. In such a case, since the interval L between the conductive linear bodies 21 is equal to or less than the above upper limit value, the difference between the average temperature of the entire sheet and the temperature directly above the conductive linear bodies 21 becomes small, and temperature control becomes impossible. easier.
  • the temperature control depends on the temperature of the conductive linear bodies 21, the deviation from the average temperature of the entire sheet can be made smaller. Moreover, from the viewpoint of suppressing temperature unevenness in the sheet-like heater 100, the interval L between the conductive linear members 21 is preferably equal.
  • the distance L between the conductive linear bodies 21 is obtained by observing the conductive linear bodies 21 of the pseudo sheet structure 2 using a digital microscope and measuring the distance between two adjacent conductive linear bodies 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. It is the length between the parts (see Figure 2).
  • the interval L is the average value of the intervals between all adjacent conductive linear bodies 21 when the conductive linear bodies 21 are arranged at uneven intervals.
  • the conductive linear body 21 is a metal wire or a linear body obtained by coating a metal wire with a conductive coating.
  • a metal wire is a linear body including a metal wire.
  • a metal wire has high thermal conductivity, high electrical conductivity, and high handleability. Therefore, if a metal wire linear body is used as the conductive linear body 21, the resistance value of the pseudo sheet structure 2 can be reduced and the light beam can be reduced. It becomes easy to improve the permeability. In addition, as described above, it is easy to obtain a filamentous body having a small diameter.
  • the metal wire must be made of a metal having a single metal element ratio of 97% by mass or more. If the ratio of a single metal element in the metal wire is less than 97% by mass, the temperature coefficient is too small to achieve sufficient temperature control.
  • 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.
  • the single metal element is preferably at least one metal element selected from the group consisting of tungsten, molybdenum, copper, nickel, iron, gold, silver, titanium and aluminum. These metal elements are preferable from the viewpoint of making the conductive linear body 21 thin, high-strength, and low in volume resistivity.
  • the metal constituting the metal wire may be an alloy containing two or more metals as long as the ratio of a single metal element is 97% by mass or more.
  • the conductive linear body 21 is preferably a linear body in which a metal wire is coated with a conductive coating.
  • the conductive coating can reduce the contact resistance between the electrode 4 and the conductive linear body 21, and can prevent corrosion of the metal forming the metal wire.
  • Conductive coatings include coatings with metal plating and coatings with carbon materials. Examples of the metal plating metal that coats the metal wire include gold, tin, zinc, silver, nickel, chromium, nickel-chromium alloys, and solder. Examples of the carbon material that coats the metal wire include amorphous carbon (eg, carbon black, activated carbon, hard carbon, soft carbon, mesoporous carbon, carbon fiber, etc.), graphite, fullerene, graphene, carbon nanotubes, and the like.
  • amorphous carbon eg, carbon black, activated carbon, hard carbon, soft carbon, mesoporous carbon, carbon fiber, etc.
  • the resin layer 3 is a layer containing resin. This resin layer 3 can directly or indirectly support the pseudo sheet structure 2 . Note that the resin layer 3 does not necessarily have to be provided. The resin layer 3 is provided as required. Moreover, the resin layer 3 is preferably a layer containing an adhesive. When the pseudo sheet structure 2 is formed on the resin layer 3 , the adhesive facilitates the attachment of the conductive linear bodies 21 to the resin layer 3 . Moreover, it is preferable that the resin layer 3 has stretchability. In such a case, the stretchability of the sheet heater 100 can be ensured.
  • the resin layer 3 may be a layer made of a resin that can be dried or cured. This gives the resin layer 3 sufficient hardness to protect the pseudo sheet structure 2, and the resin layer 3 also functions as a protective film. Moreover, the cured or dried resin layer 3 has impact resistance, and deformation of the resin layer 3 due to impact can be suppressed.
  • the resin layer 3 is preferably curable with energy rays such as ultraviolet rays, visible energy rays, infrared rays, electron rays, etc., because it can be easily cured in a short time.
  • energy ray curing includes heat curing by heating using energy rays.
  • the adhesive for the resin layer 3 examples include a thermosetting adhesive that hardens with heat, a so-called heat seal type that adheres with heat, and an adhesive that develops sticking properties when wetted.
  • the resin layer 3 is preferably energy ray-curable.
  • energy ray-curable resins include compounds having at least one polymerizable double bond in the molecule, and acrylate compounds having a (meth)acryloyl group are preferred.
  • acrylate compounds include chain aliphatic skeleton-containing (meth)acrylates (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, etc.) , cycloaliphatic skeleton-containing (meth)acrylates (dicyclopentanyl di(meth)acrylate, dicyclopentadiene di(meth)acrylate, etc.), polyalkylene glycol (meth)acrylates (polyethylene glycol di(meth)acrylate,
  • the weight average molecular weight (Mw) of the energy ray-curable resin is preferably 100-30,000, more preferably 300-10,000.
  • the energy ray-curable resin contained in the adhesive composition may be of one type or two or more types, and when two or more types are used, the combination and ratio thereof can be arbitrarily selected. Furthermore, it may be combined with a thermoplastic resin, which will be described later, and the combination and ratio can be arbitrarily selected.
  • the resin layer 3 may be an adhesive layer formed from an adhesive (pressure-sensitive adhesive).
  • the adhesive for the adhesive layer is not particularly limited. Examples of adhesives include acrylic adhesives, urethane adhesives, rubber adhesives, polyester adhesives, silicone adhesives, and polyvinyl ether adhesives. Among these, the adhesive is preferably at least one selected from the group consisting of an acrylic adhesive, a urethane adhesive, and a rubber adhesive, and more preferably an acrylic adhesive.
  • acrylic pressure-sensitive adhesives include polymers containing structural units derived from alkyl (meth)acrylates having straight-chain alkyl groups or branched-chain alkyl groups (that is, polymers obtained by polymerizing at least alkyl (meth)acrylates ), an acrylic polymer containing structural units derived from a (meth)acrylate having a cyclic structure (that is, a polymer obtained by polymerizing at least a (meth)acrylate having a cyclic structure), and the like.
  • (meth)acrylate” is used as a term indicating both "acrylate” and "methacrylate”, and the same applies to other similar terms.
  • the acrylic copolymer may be crosslinked with a crosslinking agent.
  • 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.
  • a hydroxyl group, a carboxyl group, or the like 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.
  • the resin layer 3 may contain the energy ray-curable resin described above in addition to the adhesive.
  • the energy-ray-curable components include 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.
  • the reaction between the functional group of the compound and the functional group derived from the monomer component in the acrylic copolymer enables the side chains of the acrylic copolymer to polymerize by irradiation with energy rays.
  • a component having an energy ray-polymerizable side chain may be used as a polymer component other than the acrylic polymer.
  • thermosetting resin used for 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, and phenoxy resin. , amine-based compounds, and acid anhydride-based compounds. These can be used individually by 1 type or in combination of 2 or more types. 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 imidazole curing catalysts, and are particularly excellent.
  • the moisture-curable resin used for the resin layer 3 is not particularly limited, and examples thereof include urethane resins, modified silicone resins, etc., which are resins in which isocyanate groups are generated by moisture.
  • a photopolymerization initiator When using an energy ray-curable resin or a thermosetting resin, it is preferable to use a photopolymerization initiator, a thermal polymerization initiator, or the like.
  • a photopolymerization initiator, a thermal polymerization 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 can be protected more firmly.
  • 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 -hydroxycyclohexylphenyl ketone, benzyldiphenylsulfide, tetramethylthiuram monosulfide, azobisisobutyronitrile, 2-chloroanthraquinone, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, and bis(2,4,6) -trimethylbenzoyl)-phenyl-phosphine oxide and the like.
  • Thermal polymerization initiators include hydrogen peroxide, peroxodisulfates (ammonium peroxodisulfate, sodium peroxodisulfate, potassium peroxodisulfate, etc.), 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 organic peroxides (benzoyl peroxide, lauroyl peroxide, peracetic acid, persuccinic acid, di-t-butyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, etc.).
  • polymerization initiators can be used singly or in combination of two or more.
  • the amount used is 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 thermosetting resin. , 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 be a layer made of, for example, a thermoplastic resin composition instead of being curable.
  • a thermoplastic resin composition By including a solvent in the thermoplastic resin composition, the thermoplastic resin layer can be softened. This makes it easy to attach the conductive linear bodies 21 to the resin layer 3 when forming the pseudo sheet structure 2 on the resin layer 3 .
  • the thermoplastic resin layer can be dried and solidified.
  • thermoplastic resins include polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, polyether, polyethersulfone, polyimide and acrylic resin.
  • solvents include alcohol-based solvents, ketone-based solvents, ester-based solvents, ether-based solvents, hydrocarbon-based solvents, halogenated alkyl-based solvents, and water.
  • the resin layer 3 may contain an inorganic filler. By including the inorganic filler, the hardness of the cured resin layer 3 can be further improved. Moreover, the thermal conductivity of the resin layer 3 is improved.
  • inorganic fillers examples include inorganic powders (for example, powders of silica, alumina, talc, calcium carbonate, titanium white, red iron oxide, silicon carbide, metals, boron nitride, etc.), beads obtained by spheroidizing inorganic powders, and single crystals. fibers, and glass fibers.
  • silica fillers and alumina fillers are preferred as inorganic fillers.
  • An inorganic filler may be used individually by 1 type, and may use 2 or more types together.
  • the resin layer 3 may contain other components.
  • Other components include, for example, organic solvents, flame retardants, tackifiers, ultraviolet absorbers, antioxidants, preservatives, antifungal agents, plasticizers, antifoaming agents, and well-known additives such as wettability modifiers. agents.
  • the thickness of the resin layer 3 is appropriately determined according to the use of the sheet heater 100.
  • the thickness of the resin layer 3 is preferably 3 ⁇ m or more and 150 ⁇ m or less, more preferably 5 ⁇ m or more and 100 ⁇ m or less.
  • Electrode 4 is used to supply current to conductive linear body 21 . Electrode 4 is in direct contact with conductive linear body 21 . The electrodes 4 are arranged 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 electrode materials include conductive paste (silver paste, etc.), metal foil (copper foil, etc.), metal wire, and the like. When the electrode material is a metal wire, the number of metal wires may be one, but preferably two or more.
  • the metal of the metal foil or metal wire includes metals such as copper, aluminum, tungsten, iron, molybdenum, nickel, titanium, silver, and gold, or two metals. alloys containing more than one species (eg, steels such as stainless steel, carbon steel, brass, phosphor bronze, zirconium-copper alloys, beryllium-copper, iron-nickel, nichrome, nickel-titanium, kanthal, Hastelloy, and rhenium-tungsten). Also, the metal foil or metal wire may be plated with gold, tin, zinc, silver, nickel, chromium, nickel-chromium alloy, solder, or the like.
  • the width of 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 plan view of the sheet heater 100 .
  • 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 is the diameter of each metal wire. It means peace.
  • the thickness of the electrode 4 is preferably 2 ⁇ m or more and 200 ⁇ m or less, more preferably 2 ⁇ 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. Moreover, sufficient strength as an electrode can be obtained. In addition, when the electrode is a metal wire, the thickness of the electrode is the diameter of the metal wire.
  • the detection module 5 can detect the resistance value of the conductive linear body 21 .
  • the detection module 5 may be provided so that terminals of the detection module 5 are in contact with both ends of the conductive linear body 21 .
  • the locations where the terminals of the detection module 5 are brought into contact are not limited to both ends of the conductive linear body 21 , and may be any location on the conductive linear body 21 .
  • the detection module 5 may be provided so as to contact the electrode 4 itself.
  • the detection module 5 When the detection module 5 is provided so as to be in contact with the pair of electrodes 4 themselves, the resistance values of the plurality of conductive linear bodies 21 electrically connected to the electrodes 4 can be detected.
  • the detection module 5 can detect the voltage value and the current value applied to the conductive linear body 21, and can detect the resistance value.
  • a well-known component that can detect a voltage value, a current value, or a resistance value and is equipped with receiving and transmitting means can be appropriately used.
  • a specific example of the detection module 5 is a resistance temperature controller or the like having a receiving/transmitting means.
  • the receiving and transmitting means can transmit the detected resistance value to the control module 6, which will be described later.
  • a method for manufacturing the sheet-like heater 100 according to this embodiment is not particularly limited.
  • the sheet heater 100 can be manufactured, for example, by the following steps. First, the 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 produce the resin layer 3 . Next, the pseudo sheet structure 2 is formed by arranging and arranging the conductive linear bodies 21 on the resin layer 3 . For example, in a state in which the resin layer 3 with the substrate 1 is arranged on the outer peripheral surface of the drum member, the conductive linear body 21 is helically wound on the resin layer 3 while rotating the drum member. After that, the bundle of conductive linear bodies 21 wound spirally is cut along the axial direction of the drum member.
  • the pseudo sheet structure 2 is formed and placed on the resin layer 3 .
  • the resin layer 3 with the base material 1 on which the pseudo sheet structure 2 is formed is removed from the drum member to obtain a sheet-like conductive member.
  • this method for example, while rotating the drum member, by moving the feed-out portion of the conductive linear body 21 along the direction parallel to the axis of the drum member, adjacent conductive elements in the pseudo sheet structure 2 are moved. It is easy to adjust the interval L between the sex striatum 21 .
  • a pair of electrodes 4 is attached to both ends of the conductive linear body 21 in the pseudo sheet structure 2 of the sheet-like conductive member.
  • the sheet heater 100 can be manufactured by connecting terminals of the detection module 5 to both ends of at least one of the conductive linear bodies 21 .
  • the sheet heater 100 according to this embodiment is used using a power source 7 and a control module 6 capable of controlling the voltage or current of the power source 7, as shown in FIG.
  • the temperature coefficient of the conductive linear body 21 is measured in advance.
  • the temperature coefficient of the conductive linear body 21 is preferably 3 (10 ⁇ 3 /° C.) or more, more preferably 4 (10 ⁇ 3 /° C.) or more, and 4.7 (10 ⁇ 3 / ° C.) or higher is particularly preferred.
  • the upper limit of the temperature coefficient is not particularly limited, but may be, for example, 100 (10 -3 /°C) or less.
  • the temperature coefficient of the conductive linear body 21 can be measured by the method described in Examples below.
  • the power source 7 is electrically connected to the pair of electrodes 4 of the sheet heater 100 through terminals.
  • the detection module 5 of the sheet heater 100 transmits a signal to the control module 6 when detecting the resistance value of the conductive linear body 21 .
  • This signal may be a wireless signal or a wired signal.
  • the control module 6 receives signals sent from the sensing module 5 . Then, control module 6 calculates the estimated temperature of conductive linear body 21 from the received resistance value and the temperature coefficient of conductive linear body 21 . Then, a signal is transmitted to the power supply 7 according to the calculated value.
  • Power supply 7 receives signals transmitted from control module 6 . Then, the power supply 7 changes the voltage value or current value applied to the pair of electrodes 4 according to the signal.
  • the sheet heater 100 enables temperature control.
  • thermocontrol can be performed without separately providing a temperature sensor, a temperature fuse, or the like.
  • the sheet heater 100 includes the base material 1, but is not limited to this.
  • the sheet heater 100 does not have to include the substrate 1 .
  • the sheet heater 100 can be attached to the adherend by the resin layer 3 .
  • the sheet heater 100 includes the resin layer 3, but is not limited to this.
  • the sheet heater 100 does not have to include the resin layer 3 .
  • the pseudo sheet structure 2 may be formed by using a knitted fabric as the base material 1 and knitting the conductive linear bodies 21 into the base material 1 .
  • Example 1 An acrylic adhesive (manufactured by Lintec Co., Ltd., trade name "PK”) is applied on a release film (manufactured by Lintec Co., Ltd., trade name "SP-PET381130”), dried, and a resin with a thickness of 25 ⁇ m after drying. formed a layer.
  • a polycarbonate (PC) film manufactured by Teijin Limited, product name “L-100”, no release agent layer, thickness: 100 ⁇ m
  • a carbon-coated molybdenum wire (diameter: 12 ⁇ m, manufactured by Tokusai Co., Ltd., product name: “TMG-BS”) was prepared as a conductive linear body.
  • the composition ratio of molybdenum is 99.9%.
  • peel off the release film of the adhesive sheet manufactured by Lintec Co., Ltd., product name "SP-PET381130"
  • Both ends of the adhesive sheet in the circumferential direction were fixed with double-sided tape.
  • the conductive linear body was helically wound on the resin layer while rotating the drum member.
  • the conductive linear bodies were provided at regular intervals of 2 mm. After that, the bundle of the conductive linear bodies wound spirally was cut along the axial direction of the drum member. As a result, a pseudo sheet structure was formed and placed on the resin layer.
  • the adhesive sheet on which the pseudo sheet structure was formed was removed from the drum member to obtain a sheet-like conductive member.
  • the sheet-shaped conductive member was cut into a shape of 210 mm ⁇ 200 mm.
  • Table 1 shows the properties of the conductive linear body.
  • a gold-plated ribbon (thickness: 80 ⁇ m, width: 2 mm, gold-plated thickness: 100 nm) was attached to the surface of the adhesive layer as a lead-out electrode so that the distance between the lead-out electrodes was 200 mm. (manufactured by Teijin Limited, product name “L-100”, no release agent layer, thickness: 100 ⁇ m) was attached to prepare a sheet heater. In this sheet heater, the resistance value of any one of the conductive linear bodies can be measured.
  • a resistance temperature controller manufactured by Ace Engineering Co., Ltd. was used as the detection module.
  • Example 2 A gold-plated copper wire (diameter: 25 ⁇ m, manufacturer name: Tokusai Co., Ltd.) was prepared as the conductive linear body. The composition ratio of copper is 99.9% by mass.
  • the base material of the adhesive sheet described in Example 1 was changed to a nonwoven fabric (manufactured by Kurashiki Textile Processing Co., Ltd., trade name "TS60E"), and a release film (manufactured by Lintec Co., Ltd., trade name "SP-PET381130”). was peeled off, the surface of the resin layer was directed outward, and the adhesive sheet was wound around the outer peripheral surface of the drum member made of rubber so as not to wrinkle.
  • a nonwoven fabric manufactured by Kurashiki Textile Processing Co., Ltd., trade name "TS60E”
  • a release film manufactured by Lintec Co., Ltd., trade name "SP-PET381130”
  • Both ends of the adhesive sheet in the circumferential direction were fixed with double-sided tape.
  • the conductive linear body was helically wound on the resin layer while rotating the drum member.
  • the conductive linear bodies were provided at regular intervals of 15 mm.
  • the bundle of the conductive linear bodies wound spirally was cut along the axial direction of the drum member.
  • a pseudo sheet structure was formed and placed on the resin layer.
  • the adhesive sheet on which the pseudo sheet structure was formed was removed from the drum member to obtain a sheet-like conductive member.
  • the sheet-shaped conductive member was cut into a shape of 210 mm ⁇ 200 mm. Table 1 shows the properties of the conductive linear body.
  • a gold-plated ribbon (thickness: 80 ⁇ m, width: 2 mm, gold plating thickness: 100 nm) is attached to the surface of the adhesive layer so that the distance between the extraction electrodes is 200 mm.
  • Kako Co., Ltd., product name "TS60E” was attached to prepare a sheet heater. In this sheet heater, the resistance value between the gold-plated ribbons of the electrodes can be measured.
  • Example 3 A silver-plated rhenium-tungsten wire (diameter: 14 ⁇ m, manufacturer name: Tokusai Co., Ltd., product name: Ag(0.1)-TWR) was prepared as a conductive linear body. The composition ratio is 97 mass % tungsten and 3 mass % rhenium. Next, the release film of the adhesive sheet described in Example 1 (manufactured by Lintec Corporation, product name “SP-PET381130”) is peeled off, the surface of the resin layer is turned outward, and the outer peripheral surface is wrinkled on a rubber drum member. The adhesive sheet was wrapped around the Both ends of the adhesive sheet in the circumferential direction were fixed with double-sided tape.
  • the conductive linear body was helically wound on the resin layer while rotating the drum member.
  • the conductive linear bodies were provided at regular intervals of 10 mm. After that, the bundle of the conductive linear bodies wound spirally was cut along the axial direction of the drum member. As a result, a pseudo sheet structure was formed and placed on the resin layer. Then, the adhesive sheet on which the pseudo sheet structure was formed was taken out from the drum member to obtain a sheet-like conductive member.
  • the sheet-shaped conductive member was cut into a shape of 210 mm ⁇ 200 mm. Table 1 shows the properties of the conductive linear body.
  • a gold-plated ribbon (thickness: 80 ⁇ m, width: 2 mm, gold plating thickness: 100 nm) was attached to the surface of the adhesive layer so that the distance between the extraction electrodes was 200 mm.
  • a sheet-like heater was produced by attaching a film (manufactured by Teijin Limited, product name “L-100”, no release agent layer, thickness: 100 ⁇ m). In this sheet heater, the resistance value between the gold-plated ribbons of the electrodes can be measured.
  • Example 1 A stainless steel wire (diameter: 35 ⁇ m, manufacturer name: Tokusai Co., Ltd., product name: SUS304) was prepared as the conductive linear body. The proportion of iron in stainless steel is 72% by mass. Next, the release film of the adhesive sheet described in Example 1 (manufactured by Lintec Corporation, product name “SP-PET381130”) is peeled off, the surface of the resin layer is turned outward, and the outer peripheral surface is wrinkled on a rubber drum member. The adhesive sheet was wrapped around the Both ends of the adhesive sheet in the circumferential direction were fixed with double-sided tape. The conductive linear body was helically wound on the resin layer while rotating the drum member.
  • the conductive linear bodies were provided at regular intervals of 20 mm. After that, the bundle of the conductive linear bodies wound spirally was cut along the axial direction of the drum member. As a result, a pseudo sheet structure was formed and placed on the resin layer. Then, the adhesive sheet on which the pseudo sheet structure was formed was removed from the drum member to obtain a sheet-like conductive member. The sheet-shaped conductive member was cut into a shape of 210 mm ⁇ 200 mm. Table 1 shows the properties of the conductive linear body.
  • a copper ribbon (thickness: 80 ⁇ m, width: 2 mm) was attached to the surface of the adhesive layer so that the distance between the extraction electrodes was 200 mm, and a polycarbonate (PC) film (manufactured by Teijin Limited, (product name: "L-100", no release agent layer, thickness: 100 ⁇ m) was attached to prepare a sheet heater.
  • PC polycarbonate
  • Temperature coefficient (10 ⁇ 3 /° C.) ⁇ (R ⁇ Ra)/Ra ⁇ /(T ⁇ Ta) ⁇ 1000 (F1)
  • Ta reference temperature (assumed to be 25°C)
  • Ra resistance value at reference temperature T: arbitrary temperature
  • R resistance value and resistance value evaluation at arbitrary temperature (manufactured by the company, trade name “PC700”) was connected and measured, and the resistance value was calculated.
  • Base material 2... Pseudo sheet structure, 21... Conductive linear body, 3... Resin layer, 4... Electrode, 5... Detection module, 6... Control module, 7... Power supply, 100... Sheet heater.

Landscapes

  • Resistance Heating (AREA)
PCT/JP2022/040715 2021-11-02 2022-10-31 シート状ヒータ Ceased WO2023080112A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145084A (ja) * 1981-09-18 1983-08-29 国際技術開発株式会社 発熱体の温度制御方式
JPH07153550A (ja) * 1993-12-02 1995-06-16 Chubu Electric Power Co Inc 電気ヒ−タの温度制御方法
JP2006313653A (ja) * 2005-05-06 2006-11-16 Takazono Sangyo Co Ltd ヒータの温度調節装置およびそれを備えた薬剤分包装置
JP2021163723A (ja) * 2020-04-03 2021-10-11 リンテック株式会社 配線シート

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145084A (ja) * 1981-09-18 1983-08-29 国際技術開発株式会社 発熱体の温度制御方式
JPH07153550A (ja) * 1993-12-02 1995-06-16 Chubu Electric Power Co Inc 電気ヒ−タの温度制御方法
JP2006313653A (ja) * 2005-05-06 2006-11-16 Takazono Sangyo Co Ltd ヒータの温度調節装置およびそれを備えた薬剤分包装置
JP2021163723A (ja) * 2020-04-03 2021-10-11 リンテック株式会社 配線シート

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