WO2022124037A1 - 面状発熱編物、及び面状発熱体 - Google Patents

面状発熱編物、及び面状発熱体 Download PDF

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Publication number
WO2022124037A1
WO2022124037A1 PCT/JP2021/042410 JP2021042410W WO2022124037A1 WO 2022124037 A1 WO2022124037 A1 WO 2022124037A1 JP 2021042410 W JP2021042410 W JP 2021042410W WO 2022124037 A1 WO2022124037 A1 WO 2022124037A1
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WIPO (PCT)
Prior art keywords
yarn
generating
knit
conductive
planar heat
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Ceased
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PCT/JP2021/042410
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English (en)
French (fr)
Japanese (ja)
Inventor
廉貴 竹内
幸輔 宮崎
茂一 杉原
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Seiren Co Ltd
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Seiren Co Ltd
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Priority to JP2022568146A priority Critical patent/JPWO2022124037A1/ja
Publication of WO2022124037A1 publication Critical patent/WO2022124037A1/ja
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/12—Threads containing metallic filaments or strips
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • 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 [2D] plane, e.g. plate-heater

Definitions

  • the present invention relates to a planar heat-generating knit having a knit containing a conductive yarn as a heat-generating portion, and a planar heating element using the planar heat-generating knit.
  • the surface heating element is widely used in, for example, vehicle interiors, clothing, health / medical equipment, furniture, and the like.
  • planar heating element there has been one in which a support layer and a metal layer are laminated (see, for example, Patent Document 1).
  • the planar heating element of Patent Document 1 is formed by forming a film of copper on the surface of a polyester nonwoven fabric by sputtering and attaching an electrode to the film.
  • a knitted fabric knitted by mixing conductive yarn and elastic yarn is used as a planar heating element (see, for example, Patent Document 2).
  • the planar heating element of Patent Document 2 uses silver-plated fibers as conductive yarns and polyurethane yarns as elastic yarns, and loops of conductive yarns lined up in the course direction appear on the front and back stitches during knitting. It is a knitting organization that does.
  • the planar heating element of Patent Document 1 originally has poor elasticity of the polyester nonwoven fabric, and since copper is formed on the surface of the polyester nonwoven fabric, the rigidity of the planar heating element is increased, and the object to be heated is increased. It cannot be said that the surface followability to the surface is good.
  • planar heating element of Patent Document 2 uses a heat-sensitive polyurethane yarn as a material, it is not suitable for long-term use or high-temperature use.
  • the present invention has been made in view of the above problems, and is a planar heat-generating knitted fabric having good surface followability to a heating object, durability that is not easily deteriorated by heat, and bending durability against repeated bending. , And to provide a planar heating element.
  • the characteristic configuration of the planar heat-generating knit according to the present invention for solving the above problems is A planar heat-generating knit that uses a knit containing conductive yarn as a heat-generating part.
  • the conductive yarn has a core yarn and a conductive sheath yarn wound around the core yarn.
  • the conductive sheath yarn is a metal wire coated with an insulating resin, and is
  • the knitted fabric is knitted as a multiple knit using the conductive yarn for the connecting yarn connecting between the front structure and the back structure.
  • the knit containing the conductive yarn is used as the heat-generating portion, and the knit is a multiple knit using the conductive yarn as the connecting yarn connecting between the front structure and the back structure. Due to the elasticity of the knitted fabric, the heat generating part can be deformed by following the shape of the object to be heated well, and as a result, the object to be heated can be efficiently heated in a short time. Become. Further, if the knitted fabric is a multiple knitted fabric, the elasticity can be sufficiently increased without using a heat-sensitive elastic yarn such as the urethane yarn conventionally used, so that the durability is not easily deteriorated by heat. It is possible to realize a provided planar heat-generating knit. Further, since the conductive sheath yarn is a metal wire coated with an insulating resin, the metal wire is protected, so that a planar heat-generating knit with excellent bending durability can be realized.
  • the conductive yarn is preferably formed by winding the conductive sheath yarn 100 to 1000 times around 1 m of the core yarn.
  • planar heat-generating knit of this configuration by using a conductive yarn in which a conductive sheath yarn is wound 100 to 1000 times per 1 m of a core yarn, the elasticity of the knit is further enhanced, and excellent surface followability is achieved. It is possible to realize a planar heat-generating knit that has both bending durability.
  • the core yarn preferably has a thickness of 167 dtex or less.
  • planar heat-generating knit having this configuration, by using a core yarn having a thickness of 167 dtex or less, the flexibility of the knit is further increased, and the planar shape having excellent surface followability and bending durability.
  • a heat-generating knit can be realized.
  • the conductive sheath yarn preferably has an electrical resistivity of 5 ⁇ 10 -5 ⁇ ⁇ m or less.
  • planar heat-generating knitted fabric having this configuration, by using a conductive sheath yarn having an electrical resistivity of 5 ⁇ 10 -5 ⁇ ⁇ m or less, the temperature rise rate of the heat-generating portion is increased and the quick warming property is achieved. It is possible to realize an excellent planar heat-generating knit.
  • the knitted fabric preferably contains the conductive sheath yarn in an amount of 10% by weight or more.
  • planar heat-generating knit of this configuration when the knit contains 10% by weight or more of the conductive sheath yarn, the amount of heat generated per unit area in the heat-generating part becomes large, and in addition to the quick warming property, the heat retention after heating is increased. It is possible to realize a planar heat-generating knit with excellent properties.
  • the front structure and the back structure are organized by the same type of structure.
  • planar heat-generating knit with this configuration by knitting the front structure and the back structure with the same type of structure, it is possible to realize a planar heat-generating knit with better bending durability. Further, since the design is the same on the front side and the back side, the planar heating element can be used reversibly.
  • the characteristic configuration of the planar heating element according to the present invention for solving the above problems is A planar heating element in which an electrode is provided on any one of the above planar heating knits. In the area where the electrodes are installed in the planar heat-generating knitted fabric, the conductive sheath yarn is treated so that the metal wire is exposed.
  • planar heating element of the present invention since the planar heating knit of the present invention is used, the surface followability to the object to be heated is good, the durability is not easily deteriorated by heat, and the process is repeated. It is possible to realize a planar heating element having excellent bending durability against bending.
  • the planar heating element is treated so that the metal wire of the conductive sheath yarn is exposed in the electrode installation region in the planar heating knitted fabric, the energized state between the electrode and the conductive sheath yarn is ensured.
  • the short circuit between the adjacent conductive threads is prevented by the insulating resin, and excellent heat generation performance and high safety can be achieved at the same time.
  • the surface temperature of the heat generating portion reaches 65 ° C. within 90 seconds when energized while the surface temperature of the heat generating portion is maintained at 25 ° C.
  • the surface temperature of the heating part reaches the above-mentioned predetermined temperature in a short time, so that it can be particularly suitably used for interior parts of vehicles such as steering wheel heaters and seat heaters.
  • FIG. 1 is a perspective view of a planar heating element according to the present invention.
  • FIG. 2 is a perspective view schematically showing the structure of the planar heat-generating knit according to the present invention.
  • FIG. 3 is an explanatory diagram showing a detailed configuration of the conductive yarn.
  • planar heating knit and the planar heating element of the present invention will be described with reference to the drawings.
  • the structure (knitting structure) shown in each figure is appropriately exaggerated or simplified for ease of explanation, and does not accurately reflect the size relationship and scale relationship of the yarn contained in the knitting structure.
  • FIG. 1 is a perspective view of a planar heating element 1 according to the present invention.
  • the planar heating element 1 is a planar heating knit 10 according to the present invention, which will be described in detail later, in which electrodes 20 are provided in each of two installation regions 10a separated in the weft direction.
  • the planar heat-generating knitted fabric 10 is a knitted fabric in which conductive threads 100 are woven along the weft direction, and can be deformed to follow the shape of the object to be heated satisfactorily due to the elasticity of the knitted fabric.
  • the conductive thread 100 contains a metal wire coated with an insulating resin, and in the installation area 10a, the insulating resin is removed by a laser removing process or the like so that the metal wire is exposed. ing.
  • the electrodes 20 are electrically connected to a plurality of conductive threads 100 parallel to each other in the warp direction in each installation region 10a.
  • the planar heating element 1 can generate Joule heat in the conductive thread 100 conducting between the electrodes to heat and keep the object to be heated.
  • the object to be heated for example, interior parts of a vehicle such as a steering wheel and a seat are typical.
  • the planar heating element 1 is used by arranging it so as to cover the surface of the object to be heated.
  • FIG. 2 is a perspective view schematically showing the structure of the planar heat-generating knitted fabric 10 according to the present invention.
  • the planar heat-generating knitted fabric 10 is knitted as a multi-knit fabric using a conductive yarn 100 as a connecting yarn connecting between the front structure 201 and the back structure 202. Since the planar heat-generating knitted fabric 10 is a multiple knitted fabric, it has sufficient elasticity without using a heat-sensitive elastic yarn such as a conventionally used urethane yarn. Further, by not using elastic yarns that are sensitive to heat such as urethane yarns, the planar heat-generating knitted fabric 10 has durability that is not easily deteriorated by heat.
  • the planar heat-generating knitted fabric 10 may be knitted as a triple or more multi-knitted fabric having another knitted fabric between the front structure 201 and the back structure 202, but has flexibility to follow the surface shape of the object to be heated. Therefore, it is preferable to use a double knitted fabric.
  • the conductive thread 100 forms a loop of the front structure 201 and a loop of the back structure 202 along the weft direction in which the loops are continuous in each of the one ground thread of the front structure 201 and the one ground thread of the back structure 202. It is a connecting thread that is woven alternately. As shown in FIG. 2, in the planar heat-generating knitted fabric 10, in addition to the conductive yarn 100, the insulating yarn 300 shown by the broken line can be used as the connecting yarn for connecting the front structure 201 and the back structure 202.
  • the connecting yarn ratio (a: b) of the number a of the conductive yarn 100 and the number b of the insulating yarn 300 (hereinafter referred to as "connecting yarn ratio").
  • the heat generation performance of the planar heat-generating knitted fabric 10 is suitable for vehicle interior products such as handle heaters and seat heaters. If the connecting yarn ratio is lower than 1: 9 (that is, the number of conductive yarns 100 is small), the heat generation performance of the planar heat-generating knitted fabric 10 may be inferior. If the connecting yarn ratio is higher than 1: 1 (that is, the number of conductive yarns 100 is large), the bending durability of the planar heat-generating knitted fabric 10 may be inferior.
  • the insulating thread 300 for example, a thread made of an insulating material such as a polyester resin can be used.
  • the insulating yarn 300 includes, for example, natural fibers such as wool, silk and cotton, recycled fibers such as rayon and cupra, semi-synthetic fibers such as acetate and promix, nylon 6, nylon 66, polyamide, acrylic and acrylic. , Synthetic fibers such as polypropylene and polyurethane, and yarns composed of insulating materials such as inorganic fibers such as glass fibers can be used.
  • FIG. 3 is an explanatory diagram showing a detailed configuration of the conductive yarn 100.
  • the conductive yarn 100 is configured as a covering yarn having a core yarn 110 and a conductive sheath yarn 120 wound around the core yarn 110.
  • the conductive yarn 100 may be either a single covering yarn in which one conductive sheath yarn 120 is wound around the core yarn 110, or a double covering yarn in which two conductive sheath yarns 120 are wound around the core yarn 110. It is good, but it is preferably a double covering yarn.
  • FIG. 3 illustrates a double covering yarn in which two conductive sheath yarns 120A and 120B are wound around a core yarn 110. With the conductive yarn 100 of such a double covering yarn, the temperature rise rate of the planar heat-generating knitted fabric 10 is increased, and the quick warming property is excellent.
  • the fineness of the core yarn 110 is preferably 167 dtex or less, and more preferably 84 dtex or less. When the fineness of the core yarn 110 is 167 dtex or less, the conductive yarn 100 becomes flexible and the planar heat-generating knitted fabric 10 has excellent surface followability.
  • the material of the core yarn 110 a material (material that can be heated and melted) that can be easily removed by laser removal processing or the like is used in order to form an installation area 10a for attaching the electrode 20 to the planar heat-generating knitted fabric 10.
  • a material material that can be heated and melted
  • Examples of the material of such a core yarn 110 include polyester, and polyethylene terephthalate is particularly preferable.
  • the coil-shaped metal wire 121 from which the core yarn 110 and the insulating resin film 122 have been removed from the conductive yarn 100 remains, and the surface of the installation region 10a remains. Will be exposed to.
  • the conductive sheath thread 120 has a metal wire 121 and an insulating resin film 122 that covers the metal wire 121.
  • the diameter of the metal wire 121 is preferably 20 to 80 ⁇ m, more preferably 25 to 70 ⁇ m.
  • the planar heat-generating knitted fabric 10 has both excellent bending durability and surface followability. If the diameter of the metal wire 121 is less than 20 ⁇ m, the metal wire 121 is likely to be broken when the planar heat-generating knitted fabric 10 is bent, and there is a possibility that sufficient bending durability cannot be obtained. If the diameter of the metal wire 121 exceeds 80 ⁇ m, the conductive yarn 100 becomes hard, and the surface followability of the planar heat-generating knitted fabric 10 may be deteriorated.
  • the material of the metal wire 121 is, for example, aluminum, nickel, copper, titanium, magnesium, tin, zinc, iron, silver, gold, platinum, vanadium, molybdenum, tungsten, chromium, manganese, silicon, lead, bismuth, boron, germanium.
  • Alone metals such as arsenic, antimony, tellurium, and cobalt, and alloys thereof can be used, and among these, copper and nickel and alloys of copper and silicon are preferably used.
  • carbon fiber for the conductive sheath yarn 120 instead of the metal wire 121 coated with the insulating resin film 122.
  • the insulating resin film 122 protects the metal wire 121 and prevents the metal wire 121 from being broken due to bending or the like.
  • the insulating resin film 122 is a material (heated and melted) that can be easily removed by laser removal processing or the like in order to make the metal wire 121 and the electrode 20 electrically conductive in the installation area 10a of the planar heat-generating knitted fabric 10. Possible materials) are used. Examples of the material of such an insulating resin film 122 include a thermoplastic elastomer (TPE: ThermoPlastic Elastomer).
  • the thickness of the insulating resin film 122 is preferably 4 to 8 ⁇ m.
  • the thickness of the insulating resin film 122 is within the above range, the bending durability and flexibility of the conductive sheath yarn 120 are suitable. If the thickness of the insulating resin film 122 is less than 4 ⁇ m, the protection of the metal wire 121 may be insufficient. When the thickness of the insulating resin film 122 exceeds 8 ⁇ m, the conductive sheathed yarn 120 becomes hard, the surface followability of the planar heat-generating knitted fabric 10 is inferior, and the insulating resin film 122 is completely removed by laser removal processing or the like. It may be difficult.
  • the conductive sheath yarn 120 preferably has an electrical resistivity of 5 ⁇ 10 -5 ⁇ ⁇ m or less. If the electrical resistivity of the conductive sheath yarn 120 is 5 ⁇ 10 -5 ⁇ ⁇ m or less, it is a planar heat-generating knit with a size of about 40 cm in the weft direction used for interior parts of vehicles such as handle heaters and seat heaters. In No. 10, when a voltage of 14 V is applied by the vehicle-mounted battery, an appropriate Joule heat is generated, so that the temperature rise rate of the planar heat-generating knitted fabric 10 is increased, and the quick warming property is excellent.
  • the number of turns per 1 m of the conductive sheath yarn 120 (hereinafter, simply referred to as “the number of turns”) is preferably 100 to 1000, and more preferably 200 to 500.
  • the conductive yarn 100 becomes flexible, and as a result, the elasticity of the planar heat-generating knitted fabric 10 is further increased, and excellent surface followability and bending durability are obtained. Can be combined.
  • the number of turns of the core yarn 110 is less than 100, the conductive sheath yarn 120 contained in the planar heat-generating knitted fabric 10 may be insufficient, the calorific value per unit area may be small, and quick warming may not be obtained. .. If the number of turns of the core yarn 110 exceeds 1000, the conductive yarn 100 may become hard and the surface followability of the planar heat-generating knitted fabric 10 may be inferior.
  • the conductive sheath yarn 120 is preferably contained in an amount of 10% by weight or more, more preferably 15% by weight or more, based on the weight of the planar heat-generating knitting 10 (hereinafter, conductive in the weight of the planar heat-generating knitting 10).
  • the ratio occupied by the weight of the sex sheath yarn 120 is referred to as "metal wire ratio").
  • metal wire ratio is 10% by weight or more, the calorific value per unit area of the planar heat-generating knit 10 is large, and the planar heat-generating knit 10 is excellent in heat retention after heating in addition to quick warming. It becomes.
  • the front structure 201 and the back structure 202 are preferably weft knitted fabrics knitted with a weft knitted structure such as a tenjiku knitting, a rubber knitting, and a pearl knitting. Further, it is preferable that the front structure 201 and the back structure 202 are organized by the same knitting structure. If the knitting structure of the front structure 201 and the back structure 202 is the same, the front structure 201 and the back structure 202 show similar flexibility. Therefore, when the planar heat-generating knitted fabric 10 is bent, the front structure 201, The load applied to the conductive yarn 100 connecting the back structure 202 and the back structure 202 becomes uniform, and the bending durability of the planar heat-generating knitted fabric 10 becomes good. Further, since the design is the same on the front side and the back side, the planar heating element 1 can be used reversibly.
  • Examples of the form of the yarn used as the ground yarn of the front structure 201 and the back structure 202 include spun yarn (short fiber yarn), multifilament yarn, monofilament yarn and the like.
  • the multifilament yarn may be twisted if necessary, or may be subjected to a false twisting process or a fluid disturbance process.
  • the fineness (total fineness) of the yarn used as the ground yarn is preferably 330 dtex or less, and more preferably 167 dtex or less.
  • the material of the fiber constituting the ground yarn of the front structure 201 and the back structure 202 is not particularly limited, and examples thereof include natural fiber, regenerated fiber, semi-synthetic fiber, and synthetic fiber. These can be used alone or in combination of two or more. Among them, synthetic fibers are preferable, polyester fibers are more preferable, and polyethylene terephthalate is further preferable, because they have excellent strength. Further, since the ground yarn of the front structure 201 and the back structure 202 is composed of synthetic fibers, the front structure 201 and the back structure 202 are also lasered together with the insulating resin film 122 of the core thread 110 and the conductive sheath thread 120.
  • the shape of the fiber is not particularly limited, and may be either a long fiber or a short fiber.
  • the cross-sectional shape of the fiber is not particularly limited, and is not only a normal round shape but also a variant such as a flat type, an elliptical type, a triangular type, a hollow type, a Y type, a T type, and a U type. May be good.
  • the electrode 20 is configured as, for example, a conductive film in which a metal is vapor-deposited on the surface of a resin film such as a polyimide film, or a film in which a metal foil is attached.
  • the electrodes 20 are attached to each of the two installation areas 10a provided at intervals in the weft direction in the planar heat-generating knitted fabric 10.
  • the insulating resin film 122 on the surface of the conductive sheath thread 120 is removed together with the core thread 110 by laser removal processing or the like.
  • the coiled metal wire 121 is processed so as to be exposed.
  • the electrode 20 is electrically connected to the conductive thread 100.
  • Metals to be deposited on the resin film include, for example, aluminum, nickel, copper, titanium, magnesium, tin, zinc, iron, silver, gold, platinum, vanadium, molybdenum, tungsten, chromium, manganese, silicon, lead, bismuth, and boron. , Germanium, arsenic, antimony, tellurium, and cobalt, and alloys thereof can be used, and among these, copper and tin are preferably used.
  • the planar heating element 1 of the present invention has a heating performance as an index of quick warming, in which the time required for the surface temperature to reach 65 ° C. is 90 seconds or less when energized while the surface temperature is maintained at 25 ° C. It is preferable to have, and it is more preferable to reach 65 ° C. within 70 seconds. Anything having such a rapid warming property can be particularly suitably used for interior parts of vehicles such as steering wheel heaters and seat heaters.
  • Planar heat-generating knitted fabrics (Examples 1 to 7) having the characteristic composition of the present invention were prepared, and various measurements and evaluations were performed. Further, for comparison, a planar heat-generating knitted fabric (Comparative Examples 1 and 2) and a planar heat-generating woven fabric (Comparative Example 3) having no characteristic structure of the present invention were prepared, and the same measurement and evaluation were performed.
  • the measurement and evaluation items were constant elongation load in the warp direction, constant elongation load in the weft direction, rigidity and softness in the meridian direction, rigidity and softness in the weft direction, heat generation performance, bending durability, and surface followability. Each item will be described below.
  • Heat generation performance The heat generation performance was measured according to the following procedure. By collecting test pieces 3.5 cm in the warp direction and 11 cm in the weft direction from the planar heat-generating knit and applying laser removal processing to the areas 2 cm at both ends in the weft direction, the core yarn and the insulating resin film are removed, and the metal is removed. An installation area with exposed wires was formed. Electrodes made of a conductive film of 5 cm ⁇ 2 cm were attached to each of the installation areas to form a planar heating element.
  • Example 1 A 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as a core yarn, and a metal wire made of a Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as a conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 2, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • the planar heat-generating knitted fabric of Example 1 was obtained. In the planar heat-generating knitted fabric of Example 1, the metal wire ratio was 26% by weight.
  • Example 2 A 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as a core yarn, and a metal wire made of a Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as a conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 4, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • a planar heat-generating knitted fabric of Example 2 was obtained. In the planar heat-generating knitted fabric of Example 2, the metal wire ratio was 15% by weight.
  • Example 3 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as the core yarn, and a metal wire made of Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as the conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by single covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 2, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • a planar heat-generating knitted fabric of Example 3 was obtained. In the planar heat-generating knitted fabric of Example 3, the metal wire ratio was 15% by weight.
  • Example 4 84dtex / 36f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as the core yarn, and a metal wire made of Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as the conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 4, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • a planar heat-generating knitted fabric of Example 4 was obtained. In the planar heat-generating knitted fabric of Example 4, the metal wire ratio was 13% by weight.
  • Example 5 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as the core yarn, and a metal wire made of Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as the conductive sheath yarn, and the number of turns is 1000 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 4, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • a planar heat-generating knitted fabric of Example 5 was obtained. In the planar heat-generating knitted fabric of Example 5, the metal wire ratio was 19% by weight.
  • Example 6 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as the core yarn, and a metal wire made of Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as the conductive sheath yarn, and the number of turns is 500 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as a connecting yarn with a connecting yarn ratio of 1: 4, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • a planar heat-generating knitted fabric of Example 6 was obtained. In the planar heat-generating knitted fabric of Example 6, the metal wire ratio was 17% by weight.
  • Example 7 A 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as a core yarn, and a metal wire made of a Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as a conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering. Using this conductive yarn as the connecting yarn at a connecting yarn ratio of 1: 5, a 26-gauge / 33-inch knitting machine (manufactured by Fukuhara Seiki Seisakusho) was used to knit a double knit of the front and back woven fabrics using the following yarns.
  • the planar heat-generating knitted fabric of Example 7 was obtained. In the planar heat-generating knitted fabric of Example 7, the metal wire ratio was 9% by weight.
  • Insulation thread (ground thread): 84dtex / 36f polyethylene terephthalate thread (manufactured by NAN YA PLASTICS CORPORATION)
  • ⁇ Comparative Example 2> A 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as a core yarn, and a metal wire made of a Cu / Ni alloy having a diameter of 50 ⁇ m without a resin coating is used as a conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering.
  • a 26-gauge / 33-inch knitting machine manufactured by Fukuhara Seiki Seisakusho
  • a planar heat-generating knitted fabric of Comparative Example 2 was obtained. In the planar heat-generating knitted fabric of Comparative Example 2, the metal wire ratio was 16% by weight.
  • ⁇ Comparative Example 3> A 22dtex / 1f polyethylene terephthalate yarn (manufactured by Toray Industries, Inc.) is used as a core yarn, and a metal wire made of a Cu / Ni alloy with a diameter of 50 ⁇ m coated with TPE resin is used as a conductive sheath yarn, and the number of turns is 300 (T / m).
  • a conductive yarn was obtained by double covering.
  • the conductive yarn and the insulating yarn were used for the weft so that the mixing ratio was 1: 4, and a vertical double weave was knitted by using the following yarns to obtain a planar heat-generating woven fabric of Comparative Example 3.
  • the metal wire ratio was 10% by weight.
  • Table 1 shows the configurations, measurement results, and evaluation results of the planar heat-generating knits of Examples 1 to 7, the planar heat-generating knits of Comparative Examples 1 and 2, and the planar heat-generating woven fabric of Comparative Example 3.
  • the constant elongation load in the warp direction is 2.2 N or less
  • the constant elongation load in the weft direction is 3.5 N or less
  • the rigidity and softness in the warp direction is 53 mm or less.
  • the rigidity in the weft direction was 49 mm or less.
  • the planar heat-generating knits of Examples 1 to 7 all had excellent flexibility. Further, the planar heat-generating knits of Examples 1 to 7 had excellent quick-warming performance in terms of heat-generating performance.
  • planar heat-generating knitted fabrics of Examples 1 to 7 conductive yarns and insulating yarns are used as connecting yarns, and the connecting yarn ratio (a: b) between the number a of conductive yarns and the number b of insulating yarns is 1: 9. It is knitted by multiple knitting (double knitting) set to ⁇ 1: 2, and the strength of the conductive sheath yarn is sufficiently increased by covering the metal wire with the insulating resin, so that it is 10,000. The metal wire was not broken even by bending once, and it had excellent bending durability. In terms of surface followability, the planar heat-generating knits of Examples 1 to 7 did not cause the fabric to float.
  • planar heat-generating knits of Examples 1 to 4 and 6 to 7 in which the number of turns of the conductive sheath yarn in the conductive yarn is 500 or less have neither floating nor wrinkles of the fabric, and have extremely excellent surface followability.
  • the planar heat-generating knits of Examples 1 to 7 can be suitably used as a heater for covering the surface of the interior parts of the vehicle such as handles and seats.
  • planar heat-generating knits of Comparative Examples 1 and 2 and the planar heat-generating woven fabric of Comparative Example 3 were broken when the number of bendings was less than 10,000, and both were inferior in bending durability. Since the planar heat-generating knitted fabric of Comparative Example 1 is knitted by a single knit using a conductive yarn for the ground structure, a large force is applied to the conductive yarn by bending as compared with the case where the conductive yarn is used as a connecting yarn of multiple knitting. It is probable that the metal wire was easily broken because it was easily hooked. In the planar heat-generating knitted fabric of Comparative Example 2, it is considered that the strength of the conductive sheath yarn was insufficient because the metal wire was not covered with the insulating resin.
  • planar heat-generating woven fabric of Comparative Example 3 is a woven fabric using conductive yarn for the ground structure, it is considered that there is less play than the knitted fabric and the metal wire is easily broken. Further, the planar heat-generating woven fabric of Comparative Example 3 had an extremely large constant elongation load, a large rigidity and softness, and was inferior in flexibility as compared with the planar heat-generating knitted fabrics of Examples 1 to 7. As a result, the planar heat-generating woven fabric of Comparative Example 3 had inferior surface followability, and the fabric floated.
  • planar heating knitted fabric and the planar heating element of the present invention include, for example, vehicle interiors such as handle heaters and seat heaters, clothing such as coats, trousers and gloves, and health / medical care such as massage chairs and nursing beds. It can be used for furniture such as appliances, chairs, and sofas.
  • Plane heating element 10 Plane heating knit 10a Electrode installation area 20 Electrode 100 Conductive yarn 110 Core yarn 120 Conductive sheath yarn 121 Metal wire 122 Insulating resin film 201 Front structure 202 Back structure

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Knitting Of Fabric (AREA)
PCT/JP2021/042410 2020-12-09 2021-11-18 面状発熱編物、及び面状発熱体 Ceased WO2022124037A1 (ja)

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CN119967705A (zh) * 2024-07-09 2025-05-09 浙江南烯科技有限公司 一种一体成型的多层柔性织物电路

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JP2011243307A (ja) * 2010-05-14 2011-12-01 Toyota Boshoku Corp 断線検査方法
WO2013084668A1 (ja) * 2011-12-09 2013-06-13 日産自動車株式会社 布状ヒーター
JP2014015696A (ja) * 2012-07-11 2014-01-30 Nissan Motor Co Ltd マトリクス状布
JP2014157824A (ja) * 2011-12-09 2014-08-28 Sanki Consys Co Ltd 布ヒータ

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JP5594111B2 (ja) * 2010-12-13 2014-09-24 トヨタ紡織株式会社 導電糸に導電性部材を接続する接続方法

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JP2011243307A (ja) * 2010-05-14 2011-12-01 Toyota Boshoku Corp 断線検査方法
WO2013084668A1 (ja) * 2011-12-09 2013-06-13 日産自動車株式会社 布状ヒーター
JP2014157824A (ja) * 2011-12-09 2014-08-28 Sanki Consys Co Ltd 布ヒータ
JP2014015696A (ja) * 2012-07-11 2014-01-30 Nissan Motor Co Ltd マトリクス状布

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119967705A (zh) * 2024-07-09 2025-05-09 浙江南烯科技有限公司 一种一体成型的多层柔性织物电路

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