EP3772548B1 - Conducting fabric with high versatility in use - Google Patents

Conducting fabric with high versatility in use Download PDF

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Publication number
EP3772548B1
EP3772548B1 EP20189254.4A EP20189254A EP3772548B1 EP 3772548 B1 EP3772548 B1 EP 3772548B1 EP 20189254 A EP20189254 A EP 20189254A EP 3772548 B1 EP3772548 B1 EP 3772548B1
Authority
EP
European Patent Office
Prior art keywords
conducting
yarns
fabric
power supply
electric power
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP20189254.4A
Other languages
German (de)
French (fr)
Other versions
EP3772548A1 (en
Inventor
Marco Corradini
Daniele DALLARI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ama Composites SRL
Original Assignee
Ama Composites SRL
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Filing date
Publication date
Application filed by Ama Composites SRL filed Critical Ama Composites SRL
Publication of EP3772548A1 publication Critical patent/EP3772548A1/en
Application granted granted Critical
Publication of EP3772548B1 publication Critical patent/EP3772548B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0088—Fabrics having an electronic function
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
    • D03D15/25—Metal
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
    • D03D15/267—Glass
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/533—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads antistatic; electrically conductive
    • 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
    • D04B1/10—Patterned fabrics or articles
    • D04B1/12—Patterned fabrics or articles characterised by thread material
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
    • D10B2101/06—Glass
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/20—Metallic fibres
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/16—Physical properties antistatic; conductive

Definitions

  • the present invention relates to a conducting fabric with high versatility in use. More particularly, the invention relates to a conducting fabric capable of carrying electric power inside it. Such a conducting fabric is known for example from EP 1 722 614 A1 .
  • conducting fabrics also known as “conduthermal” fabrics
  • conducting fabrics are commercially widespread which are provided by means of continuous copper yarn (which acts as weft yarn) and glass fiber (which acts as warp), so as to provide equipotential multisector electrical resistors which are mutually connected in parallel by using a flat copper band coupled to the laminated fabric.
  • This solution with copper flat band has some disadvantages, which are first of all due to the fact that the applied copper band is extremely rigid, which entails a problem for particular applications in which the fabric fundamentally must be flexible.
  • the applied copper band can create problems if it is necessary to perform a coupling or adhesive bonding with resin or materials that must penetrate into the fabric uniformly, since the band would create a barrier to this penetration.
  • the aim of the present invention is to provide a conducting fabric with high versatility in use that allows to provide within a same fabric areas that have specific characteristics that are identical or different depending on the quantity of conducting material that is present in each area and the purpose of which is to generate heat.
  • an object of the present invention is to provide a conducting fabric with high versatility in use which can be flexible.
  • Another object of the present invention is to provide a conducting fabric that allows to carry both power and electrical signals.
  • a further object of the present invention is to provide a conducting fabric that can be provided directly with a weaving loom of the perpendicular or circular type.
  • Another object of the present invention is to provide a conducting fabric that can be provided as a function of the power to be carried.
  • Another object of the present invention is to provide a conducting fabric that is highly reliable, relatively simple to provide and at competitive costs.
  • the conducting fabric according to the invention designated generally by the reference numeral 1, comprises a plurality of warp yarns 2, the warp yarns comprising at least two insulated conducting warp yarns 3 which are adapted to carry the electric power supply within the fabric 1 itself, as if they were a line cable that carries power and/or signals.
  • the weft yarn 4 is a conducting and insulated continuous yarn, for example made of copper, which intersects the power supply yarns 3, indeed drawing power from them.
  • the weft yarn 4 is a copper yarn which runs back and forth, weaving in with the warp yarns which are conveniently made for example of glass fiber.
  • the continuous yarn allows to provide a resistive fabric with practically nil electromagnetic emissions. This is due to the fact that the continuous yarn that is woven in at each return runs practically in contact with the forward one; then the loom performs the desired beat and then another forward and return run in contact.
  • the electromagnetic field generated by an electrical cable crossed by a current which moves in one direction is canceled out by the opposite electromagnetic field generated by the subsequent cable (in contact) which is crossed by the same current but in the opposite direction.
  • weft yarn 4 "connects" to the conducting warp yarn 3 by means of welds 5 which can be provided by spot welding, tin welding, welding paste, ultrasound or any other known method in order to provide electrical sectors that are powered by the conducting warp yarns 3.
  • the fabric described above is provided by continuous weaving on a weaving loom, and it is also possible to decide on the dimensions in relation to the power to be carried.
  • the fabric described above allows to provide inside it areas that have mutually identical or different specific characteristics depending on the quantity of conducting material that is present in each sector (length and cross-section of the yarn, specific resistance).
  • the fabric is used as an electrical resistor to produce heat, it is possible to obtain articles with areas having a variable resistance which are therefore capable of delivering different power levels and/or of being powered with different power supply voltages.
  • the fabric can be calendered or coupled with insulating materials such as silicones, EPDM, resins of another kind and rubbers in general.
  • the fabric can be made, instead of with a continuous weft, with a weft made of yarn, for example copper yarn, which is single, in this case designated by the reference numeral 10.
  • the two power supply warp yarns 3 cross the single weft yarn 10 and the weft yarn 10 is welded at the intersection of the power supply warp yarn 3 with welds 5 and with a connecting wire 9 which has the purpose of closing the circuit.
  • the fabric 1 comprises a plurality of weft yarns which can alternately be of the insulating or of the insulated conducting type 3. At least two of the latter will be used to supply power to the circuit composed of the insulated conducting yarn 4 which will act as a resistor (for example copper yarn) and other non-conducting yarns 2 (for example glass or polyester yarn).
  • the warp yarns of the conducting type can be provided by means of a flat ribbon made of metal, for example made of copper, which is very thin, such as not to compromise the flexibility of the fabric, and which can be used easily instead of a warp yarn.
  • the fabric according to the invention fully achieves the intended aim and objects, being able to provide a fabric that can be supplied with electric power, with areas having a different resistances depending on the requirements.
  • the materials used, as well as the contingent shapes may be any according to the requirements and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Woven Fabrics (AREA)
  • Conductive Materials (AREA)

Description

  • The present invention relates to a conducting fabric with high versatility in use. More particularly, the invention relates to a conducting fabric capable of carrying electric power inside it. Such a conducting fabric is known for example from EP 1 722 614 A1 .
  • As is known, conducting fabrics, also known as "conduthermal" fabrics, are commercially widespread which are provided by means of continuous copper yarn (which acts as weft yarn) and glass fiber (which acts as warp), so as to provide equipotential multisector electrical resistors which are mutually connected in parallel by using a flat copper band coupled to the laminated fabric. This solution with copper flat band, however, has some disadvantages, which are first of all due to the fact that the applied copper band is extremely rigid, which entails a problem for particular applications in which the fabric fundamentally must be flexible.
  • Furthermore, the applied copper band can create problems if it is necessary to perform a coupling or adhesive bonding with resin or materials that must penetrate into the fabric uniformly, since the band would create a barrier to this penetration.
  • Furthermore, another drawback is due to the linear expansions that each material can have if it is heated and which, in the case of two different materials (fabric and solid conducting band), in case of encapsulation, might cause breakages or separations.
  • The aim of the present invention is to provide a conducting fabric with high versatility in use that allows to provide within a same fabric areas that have specific characteristics that are identical or different depending on the quantity of conducting material that is present in each area and the purpose of which is to generate heat.
  • Within this aim, an object of the present invention is to provide a conducting fabric with high versatility in use which can be flexible.
  • Another object of the present invention is to provide a conducting fabric that allows to carry both power and electrical signals.
  • A further object of the present invention is to provide a conducting fabric that can be provided directly with a weaving loom of the perpendicular or circular type.
  • Another object of the present invention is to provide a conducting fabric that can be provided as a function of the power to be carried.
  • Another object of the present invention is to provide a conducting fabric that is highly reliable, relatively simple to provide and at competitive costs.
  • This aim, as well as these and other objects which will become more apparent hereinafter, are achieved by a conducting fabric according to claim 1.
  • Further characteristics and advantages of the invention will become more apparent from the description of preferred but non-limiting embodiments of the conducting fabric according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
    • Figure 1 is a view of a first embodiment of the fabric according to the present invention;
    • Figure 2 is a view of a fabric outside the scope of the independent claims;
    • Figure 3 is a view of a second embodiment of the fabric according to the present invention.
  • With reference to the figures, in which identical reference numerals correspond to identical elements, the conducting fabric according to the invention, designated generally by the reference numeral 1, comprises a plurality of warp yarns 2, the warp yarns comprising at least two insulated conducting warp yarns 3 which are adapted to carry the electric power supply within the fabric 1 itself, as if they were a line cable that carries power and/or signals.
  • In this case the weft yarn 4 is a conducting and insulated continuous yarn, for example made of copper, which intersects the power supply yarns 3, indeed drawing power from them.
  • More particularly, the weft yarn 4 is a copper yarn which runs back and forth, weaving in with the warp yarns which are conveniently made for example of glass fiber. The continuous yarn allows to provide a resistive fabric with practically nil electromagnetic emissions. This is due to the fact that the continuous yarn that is woven in at each return runs practically in contact with the forward one; then the loom performs the desired beat and then another forward and return run in contact. With this fabric architecture, the electromagnetic field generated by an electrical cable crossed by a current which moves in one direction is canceled out by the opposite electromagnetic field generated by the subsequent cable (in contact) which is crossed by the same current but in the opposite direction. The weft yarn 4 "connects" to the conducting warp yarn 3 by means of welds 5 which can be provided by spot welding, tin welding, welding paste, ultrasound or any other known method in order to provide electrical sectors that are powered by the conducting warp yarns 3.
  • Conveniently, in order to avoid the deformation of the fabric during any co-lamination and calendering process, it is possible to provide for the insertion, during weaving, of a microfilament 8 made of glass in the weft, warp, or in both directions, which is hot welded onto the insulated conducting yarn, or on the yarn 2 made of insulating material, generating a mesh which makes it possible to increase the tensile strength of the fabric in the various directions, including the oblique one.
  • The fabric described above is provided by continuous weaving on a weaving loom, and it is also possible to decide on the dimensions in relation to the power to be carried.
  • The fabric described above allows to provide inside it areas that have mutually identical or different specific characteristics depending on the quantity of conducting material that is present in each sector (length and cross-section of the yarn, specific resistance).
  • Therefore, considering that the fabric is used as an electrical resistor to produce heat, it is possible to obtain articles with areas having a variable resistance which are therefore capable of delivering different power levels and/or of being powered with different power supply voltages.
  • The fabric can be calendered or coupled with insulating materials such as silicones, EPDM, resins of another kind and rubbers in general.
  • As an example outside the scope of the present invention, the fabric can be made, instead of with a continuous weft, with a weft made of yarn, for example copper yarn, which is single, in this case designated by the reference numeral 10.
  • The two power supply warp yarns 3 cross the single weft yarn 10 and the weft yarn 10 is welded at the intersection of the power supply warp yarn 3 with welds 5 and with a connecting wire 9 which has the purpose of closing the circuit.
  • Likewise, in a second embodiment, even in a "mesh" fabric that is usually provided by means of a circular weft knitting machine it is possible to make use of the principle on which the present invention is based. In this case, Figure 3, the fabric 1 comprises a plurality of weft yarns which can alternately be of the insulating or of the insulated conducting type 3. At least two of the latter will be used to supply power to the circuit composed of the insulated conducting yarn 4 which will act as a resistor (for example copper yarn) and other non-conducting yarns 2 (for example glass or polyester yarn).
  • Advantageously, the warp yarns of the conducting type can be provided by means of a flat ribbon made of metal, for example made of copper, which is very thin, such as not to compromise the flexibility of the fabric, and which can be used easily instead of a warp yarn.
  • In practice it has been found that the fabric according to the invention fully achieves the intended aim and objects, being able to provide a fabric that can be supplied with electric power, with areas having a different resistances depending on the requirements.
  • The fabric thus conceived is susceptible of numerous modifications and variations within the scope of the accompanying claims.
  • In practice, the materials used, as well as the contingent shapes, may be any according to the requirements and the state of the art.
  • Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims (8)

  1. A woven or weft knitted conducting fabric (1) comprising at least two yarns (3) adapted to carry an electric power supply, and a conducting yarn (4) of the fabric that intersects said at least two yarns (3) adapted to carry an electric power supply and that is welded at intersections (5) with said at least two yarns (3) adapted to carry an electric power supply, in order to define areas of said fabric that are adapted to be supplied with power, characterized in that said conducting yarn (4) of the fabric that intersects said at least two yarns (3) adapted to carry an electric power supply is a continuous single yarn.
  2. The conducting fabric according to claim 1, characterized in that said at least two yarns (3) adapted to carry an electric power supply are warp yarns.
  3. The conducting fabric according to claim 1, characterized in that said at least two yarns (3) adapted to carry an electric power supply are weft yarns.
  4. The conducting fabric according to one or more of the preceding claims, characterized in that said at least two yarns (3) adapted to carry an electric power supply are made of copper or other conducting material.
  5. The conducting fabric according to one or more of the preceding claims, characterized in that said conducting yarn (4) which intersects and is welded to said at least two yarns (3) adapted to carry an electric power supply is made of copper or other conducting material.
  6. The conducting fabric according to one or more of the preceding claims, further comprising non-conducting yarns (2) that intersect said at least two yarns (3) adapted to carry an electric power supply and that are made of insulating material.
  7. The conducting fabric according to one or more of the preceding claims, characterized in that said conducting yarn (4) is provided by means of a flat metal ribbon.
  8. A method for providing a conducting fabric, characterized in that it comprises the steps of:
    - weaving, directly on a weaving loom, a fabric (1) by replacing at least two warp yarns (2) with yarns (3) adapted to carry an electric power supply;
    - welding a conducting weft yarn (4) at crossing points (5) with said at least two yarns (3) adapted to carry an electric power supply;
    said conducting weft yarn (4) that intersects said at least two yarns (3) adapted to carry an electric power supply being made of conducting material, characterized in that said conducting yarn (4) of the fabric that intersects said at least two yarns (3) adapted to carry an electric power supply is a continuous single yarn.
EP20189254.4A 2019-08-05 2020-08-03 Conducting fabric with high versatility in use Active EP3772548B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000013944A IT201900013944A1 (en) 2019-08-05 2019-08-05 Conductive fabric with high versatility of use.

Publications (2)

Publication Number Publication Date
EP3772548A1 EP3772548A1 (en) 2021-02-10
EP3772548B1 true EP3772548B1 (en) 2022-07-27

Family

ID=68988171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20189254.4A Active EP3772548B1 (en) 2019-08-05 2020-08-03 Conducting fabric with high versatility in use

Country Status (5)

Country Link
EP (1) EP3772548B1 (en)
ES (1) ES2928571T3 (en)
HU (1) HUE060360T2 (en)
IT (1) IT201900013944A1 (en)
PT (1) PT3772548T (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256092A (en) * 1991-05-24 1992-11-25 Kitagawa Ind Co Ltd An electromagnetic shielding mesh

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE381250T1 (en) * 2005-05-13 2007-12-15 Sefar Ag CIRCUIT BOARD AND METHOD FOR THE PRODUCTION THEREOF
FR2920442A1 (en) * 2007-10-10 2009-03-06 Commissariat Energie Atomique Textile for recovering sensor information distributed on person in e.g. sports field, has electrically conducting wires constituted by mixed assembly of textile fibers and copper wire, where copper wire is enameled

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256092A (en) * 1991-05-24 1992-11-25 Kitagawa Ind Co Ltd An electromagnetic shielding mesh

Also Published As

Publication number Publication date
ES2928571T3 (en) 2022-11-21
IT201900013944A1 (en) 2021-02-05
HUE060360T2 (en) 2023-02-28
EP3772548A1 (en) 2021-02-10
PT3772548T (en) 2022-10-13

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