EP2971302A2 - Electrically conductive fabric - Google Patents
Electrically conductive fabricInfo
- Publication number
- EP2971302A2 EP2971302A2 EP14708840.5A EP14708840A EP2971302A2 EP 2971302 A2 EP2971302 A2 EP 2971302A2 EP 14708840 A EP14708840 A EP 14708840A EP 2971302 A2 EP2971302 A2 EP 2971302A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarns
- fabric
- electrically conductive
- warp
- conductive yarns
- 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.)
- Granted
Links
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
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/006—With additional leno yarn
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
- H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
- H05B3/347—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles woven fabrics
-
- 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
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
- H05B2203/015—Heater wherein the heating element is interwoven with the textile
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/029—Heaters specially adapted for seat warmers
Definitions
- the invention relates to a woven electrically conductive fabric that is
- electrically conductive fabrics can e.g. be used in electrical heating elements, in textile electronics - which are electrical components consisting essentially out of textile structures (e.g. conductive textiles, e.g. in apparel) -, as sensor and for electromagnetic shielding.
- EP2206813A1 relates to a textile product that includes a leno woven fabric comprising electrically conductive yarns running in two directions.
- the connecting yarns are formed by electrically conductive floating yarns that are sectionally integrated in the fabric.
- the surface resistivity in the directions that make an angle of 45° with the warp and weft direction is at maximum 6 times higher than the average of the surface resistivity in warp and in weft direction.
- a sufficient isotropy is specifically of importance in conditions where the fabric is used where electrodes are connected in such a way to the fabric that the straight connection between the electrodes is not in warp or in weft direction.
- the fabric must have a textile character.
- textile character is meant that the fabric must feel like a textile fabric, more specifically a textile fiber feel, as is obtained with fabrics with natural fibers (cotton, wool) or synthetic fibers or filaments (polyester, polyamide).
- Preferred fabrics have good air permeability and/or offer excellent
- binding yarns are uniformly distributed over the width of the fabric; these yarns are preferably not electrically conductive,
- the density of the set of electrically conductive yarns in the warp direction is substantially equal to the density of the electrically conductive set of yarns in the weft direction is;
- the electrically conductive yarns in the warp direction and the electrically conductive yarns in the weft direction have the same electrical conductivity, when considered per unit of length of the yarn;
- the set of binding yarns provides - via a leno weave with the set of electrically conductive yarns in warp direction - the connection in the fabric between the set of electrically conductive yarns in warp direction and the set of electrically conductive yarns in weft direction.
- Such a fabric provides a sufficient isotropy of the surface resistivity when the surface resistivity is measured in different directions.
- electrodes is also equal to D, such that a fabric of square shape with sides equal to D is enclosed by the electrodes.
- the length D for the determination of the surface resistivity is 10 cm.
- the conductive fabric of the invention has by the synergistic combination of its features a number of specific properties:
- the surface resistivity of the fabric is isotropic in warp and in weft direction.
- the surface resistivity in warp direction is at maximum 10% higher or 10% lower than the surface resistivity in weft direction.
- the anisotropy of the surface resistivity in the other directions is limited (e.g. when the surface resistivity is measured in other directions, e.g. in 45° direction and compared with the surface resistivity in warp and/or weft direction), such that the surface resistivity is sufficiently isotropic.
- the electrical conductivity and the isotropy of the electrical conductivity are maintained at and after mechanical loading (including at cyclic dynamic loading) of the fabric e.g. in tensile load in one or more directions, in shearing, and in bending.
- the fabric is durable in cyclic bending, maintaining its electrical properties, including isotropy of the electrical conductivity (as expressed by the surface resistivity).
- the fabric is well drapable, such that other than flat shapes can be covered by the fabric.
- the fabric has a textile character.
- the same yarns are used in the set of electrically conductive yarns in warp direction as in the set of electrically conductive yarns in weft direction. Better isotropy is obtained, especially in mechanical load of the fabric.
- the set of electrically non-conductive yarns in the warp direction has a density (number of yarns per cm) that is at least five times, and preferably at least 10 times, higher than the density (number of yarns per cm) of the set electrically conductive yarns in warp direction.
- the set of electrically non-conductive yarns in the weft direction has a density (number of yarns per cm) that is at least five times, and preferably at least 10 times, higher than the density (number of yarns per cm) of the set electrically conductive yarns in weft direction.
- the electrical conductive yarns in warp direction have in the fabric a crimp of less than 5%, more preferably less than 2%.
- the binding yarns in the warp direction have a crimp in the fabric which is at least 5% (absolute percentage) higher than the crimp in the fabric of the electrically conductive yarns in warp direction.
- the binding yarns in the warp direction have a crimp in the fabric between 2 and 20 %; more preferably between 7 and 20%.
- the electrically non-conductive yarns in the warp direction have a crimp between 2 and 10 %.
- the electrically non-conductive yarns in the weft direction have a crimp between 2 and 10 %.
- the electrically conductive yarns in weft direction have a crimp in the fabric less than 10 %, more preferably less than 5 %, even more preferably less than 2%.
- the fabric has an air permeability of more than 1000 liter/ (dm 2 .min), wherein the measurement is performed at an under pressure of 100 Pa and according to BS5636:1990. More preferably, the air permeability is more than 2000 liter/ (dm 2 .min) and e.g. less than 3000 liter/ (dm 2 .min).
- fabrics can be made with a rather low conductivity (e.g. fabrics with a surface resistivity in the range of 0.1 to 10 Ohm, when measured in warp direction, preferably between 1 and 10 Ohm, more preferably between 5 and 10 Ohm) and that still have the mentioned favorable properties.
- a rather low conductivity e.g. fabrics with a surface resistivity in the range of 0.1 to 10 Ohm, when measured in warp direction, preferably between 1 and 10 Ohm, more preferably between 5 and 10 Ohm
- the leno weave is formed by twisting each yarn of the set of binding yarns with respect to one yarn of the set of electrically conductive yarns in the warp direction, with each time in between one yarn of the set of electrically conductive yarns in weft direction.
- the set of electrically non-conductive yarns in warp direction and the set of electrically non-conductive yarns in the weft direction are connected to each other by means of a classical weave (with classical weave is meant that the weave is not a leno weave; examples of weaves that can be used are plain weaves, twill weaves and satin weaves or weaves derived from those weaves).
- classical weave is meant that the weave is not a leno weave; examples of weaves that can be used are plain weaves, twill weaves and satin weaves or weaves derived from those weaves.
- connection between the set of electrically conductive yarns in warp direction and the set of electrically non-conductive yarns in weft direction is obtained by means of a classical weave (with classical weave is meant that the weave is not a leno weave; examples of weaves that can be used are plain weaves, twill weaves and satin weaves or weaves derived from those weaves).
- classical weave is meant that the weave is not a leno weave; examples of weaves that can be used are plain weaves, twill weaves and satin weaves or weaves derived from those weaves.
- electrically non-conductive yarns in warp direction and the set of electrically conductive yarns in the weft direction is obtained by means of a classical weave (e.g. a plain weave, a twill weave or a satin weave or derived weaves).
- a classical weave e.g. a plain weave, a twill weave or a satin weave or derived weaves.
- connection between the set of electrically non- conductive yarns in the weft direction and the set of binding yarns in the warp direction is obtained by means of a classical weave (e.g. a plain weave, a twill weave or a satin weave or derived weaves), preferably there are no floating yarns over more than two yarns.
- a classical weave e.g. a plain weave, a twill weave or a satin weave or derived weaves
- the set of electrically non-conductive yarns in warp direction and the set of electrically non-conductive yarns in the weft direction are connected to each other by means of a leno weave.
- an additional set of binding yarns in warp direction can be available; this additional set can make a leno weave in combination with the electrically non-conductive yarns in warp direction with in between the non- conductive yarns in weft direction.
- the electrically conductive yarns in weft direction are also connected to the electrically non-conductive yarns in warp direction via the leno weave made by the electrically non- conductive yarns in warp direction in combination with the additional set of binding yarns in warp direction.
- the yarns of the additional set of binding yarns are the same in structure and composition as the set of binding yarns making the leno weave with the set of electrically conductive yarns in warp direction.
- the set of electrically non-conductive yarns in warp direction and/or the set of electrically non-conductive yarns in weft direction comprise monofilament yarns or multifilament yarns or yarns spun from fibers, preferably out of polymeric material.
- multifilament yarns out of polyester or polyamide e.g. finer than 600 dtex, e.g. finer than 200 dtex. Such yarns are beneficial for the durability of the fabric.
- thermally stabilized (heat set) multifilament yarns are used in one or both of the sets of sets of electrically non-conductive yarns.
- thermally stabilized (heat set) yarns are used in the set of
- binding yarns for instance texturized polyester multifilament in the range of 50 - 2000 dtex, e.g. in the range of 100 - 600 dtex, e.g. in the range of 100 - 500 dtex, e.g. 165 dtex or e.g. 550 dtex.
- the electrically conductive fabric has a surface resistivity between 1 en 10 Ohm when measured in the warp direction of the fabric.
- part of the binding yarns of the set of binding yarns have a leno weave in S-direction
- another part of the binding yarns of the set of binding have a leno weave in Z-direction when binding with the same weft yarn.
- the number of binding yarns that make a leno weave in S-direction is
- the characterizing feature of this embodiment synergistically maintains further the isotropy of the electrical conductivity (of the surface resistivity) of the fabric (in weft and warp direction, but also in other directions) at mechanical load of the fabric, as the fabric remains more stable in mechanical loading, as the fabric deforms more uniformly.
- the electrically conductive yarns of the set of electrically conductive yarns in warp direction and the electrically conductive yarns in the set of electrically conductive yarns in the weft direction comprise metal fibers and/or metal filaments; preferably stainless steel fibers and/or stainless steel filaments.
- metal monofilaments or metal multifilaments are used as they have a low change in electrical conductivity at mechanical load (e.g. in tensile load of the fabric).
- spun yarns e.g. blended yarns out of non- conductive fibers (e.g. comprising cotton and/or polyester) and metal fibers (e.g. out of stainless steel).
- Fibers are spun into yarns. Filaments - on their own (monofilament) or combined (twisted, plied, cabled) into a yarn (of into a multiple yarn) provide fabrics with improved isotropy of the surface resistivity.
- filaments out of stainless steel are used.
- the use of stainless steel multifilament yarns provides a synergistic improvement of the durability in cyclic loading of the fabric.
- Multifilaments out of stainless steel can e.g. be produced using the technology of bundled drawing. Such multifilaments have a characterizing hexagonal cross section.
- Metal multifilament yarns as conductive yarns in warp and weft directions preferably have a twist of at least 40 turns per meter, and preferably less than 200 turns per meter. Such twist improves the isotropy of the electrical conductivity of the fabric.
- the electrically conductive yarns in warp and in weft direction are multifilament yarns out of stainless steel, e.g. bundle drawn stainless steel filaments.
- the yarns Preferably such yarns have a twist of at least 40 turns per meter, and preferably less than 200 turns per meter. Such twist improves the isotropy of the electrical conductivity of the fabric.
- the cover factor of the fabric is higher than 0.5
- cover factor is meant the ratio of the surface that is covered by the yarns of the fabric over the surface of the fabric.
- a cover factor equal to 1 means that the full surface of the fabric is covered and that no space is present between the yarns in the fabric.
- a cover factor equal to 0.5 half of the surface is covered by the yarns of the fabric and half of the surface is not covered because there is space between the yarns in the fabric.
- the surface resistivity of the fabric in warp direction is at maximum 10% higher or 10% lower than the surface resistivity in weft direction.
- the surface resistivity in the direction under an angle of 45° with the set of electrically conductive yarns warp direction is at maximum six times the average of the surface resistivity in warp and in weft direction. And preferably at maximum five times, more preferably at maximum three times, and even more preferably at maximum two times the average of the surface resistivity in warp and in weft direction.
- the fabric comprises electrical connectors via which an electrical current and/or a voltage can be applied to the fabric.
- the electrical conductive fabric offers effective shielding against
- the distance between consecutive electrically conductive yarns is preferably at maximum 3 cm, more preferably at maximum 1 cm, even more preferably at maximum 6 mm, for a suitable shielding against electromagnetic radiation.
- Such fabrics (with a limited distance between consecutive conductive yarns) have - thanks to the synergistic effect of this feature - an improved isotropy of the surface resistivity of the fabric.
- the second aspect of the invention is the use of the electrically conductive fabric of the first aspect of the invention as sensor, as capacitor, as part in electronic components (e.g. textile electronic components) or as electrical heating element.
- Fabrics according to the invention can e.g. be used in heating elements, e.g. in apparel (coats, underwear, scarfs or shawls), in car seat heating or for heating of domestic seats, or in or as textile electronic components (e.g. in process control in apparel - electrical or electronic textiles, e.g. as sensor).
- heating elements e.g. in apparel (coats, underwear, scarfs or shawls), in car seat heating or for heating of domestic seats, or in or as textile electronic components (e.g. in process control in apparel - electrical or electronic textiles, e.g. as sensor).
- An exemplary fabric of the invention comprises the following sets of yarns:
- a set of twisted stainless steel multifilament yarns e.g. multifilament yarns which are 200 bundle drawn stainless steel filaments each of diameter 40 ⁇ , twisted together with 200 turns per meter in Z - direction
- These yarns have a crimp in the fabric of 1 %.
- polyester multifilament yarns e.g. 167/1 dtex or 550/1 dtex
- density 14 yarns per centimeter.
- a set of twisted stainless steel multifilament yarns e.g. multifilament yarns comprising 200 bundle drawn stainless steel filaments each of diameter 14 micrometer, twisted together with 200 turns per meter in Z direction
- These yarns have a crimp in the fabric of 2%.
- polyester multifilament yarns e.g. 167/1 dtex, or e.g. 550/1 dtex
- These yarns have a crimp of 5% in the fabric.
- the sets polyester multifilament yarns in the warp and weft direction are connected by means of a plain weave.
- the set electrically conductive yarns in weft direction can be connected with the set of polyester multifilament yarns in warp direction by means of a plain weave.
- the set electrically conductive yarns in warp direction and the set binding yarns in warp direction are not interwoven with the set polyester yarns in weft direction, but one set runs over and the other set below the set polyester multifilament yarns is weft direction.
- Each binding yarn makes a leno weave with a yarn from the set of twisted stainless steel multifilament yarns in warp direction, with in between each time one yarn of the set of twisted stainless steel multifilament yarns in weft direction.
- the surface resistivity of the fabric is in warp direction 0.2 Ohm, in weft direction 0.2 Ohm and 1 Ohm in the direction making an angle of 45° with warp and weft direction.
- the air permeability is 1370 l/(dm 2 .min), wherein the measurement is
- This fabric can be bent easily (e.g. up to a small bending radius) and has excellent durability in mechanical loading, inlcuding in cyclic bending loading over 180°. When the fabric is mechanically loaded, the change of the surface resistivity of the fabric is limited.
- an additional set of binding yarns in warp direction can be available, e.g. the additional binding yarns can be the same in terms of structure and composition as the set of binding yarns making the leno weave with the set of electrically conductive yarns in warp direction.
- This additional set can make a leno weave in combination with the electrically non-conductive yarns in warp direction with in between the non-conductive yarns in weft direction.
- the electrically conductive yarns in weft direction are also connected to the electrically non-conductive yarns in warp direction via the leno weave made by the electrically non-conductive yarns in warp direction in combination with the additional set of binding yarns in warp direction.
- Such fabric also provided excellent performance results.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Woven Fabrics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2013/0162A BE1021658B1 (en) | 2013-03-13 | 2013-03-13 | ELECTRICALLY CONDUCTIVE FABRIC |
PCT/EP2014/054088 WO2014139825A2 (en) | 2013-03-13 | 2014-03-03 | Electrically conductive fabric |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2971302A2 true EP2971302A2 (en) | 2016-01-20 |
EP2971302B1 EP2971302B1 (en) | 2018-08-29 |
Family
ID=48236616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14708840.5A Not-in-force EP2971302B1 (en) | 2013-03-13 | 2014-03-03 | Electrically conductive fabric |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2971302B1 (en) |
CN (1) | CN104995344B (en) |
BE (1) | BE1021658B1 (en) |
RU (1) | RU2015143622A (en) |
WO (1) | WO2014139825A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105568503B (en) * | 2016-02-26 | 2017-04-26 | 盐城工业职业技术学院 | water drop sensor fabric and production method thereof |
CN106149162A (en) * | 2016-08-24 | 2016-11-23 | 中央军委后勤保障部军需装备研究所 | A kind of Electromagnetically shielding fabrics with electric conductivity periodic structure and preparation method |
US11766900B2 (en) | 2016-12-13 | 2023-09-26 | Bridgestone Americas Tire Operations, Llc | Tire having a conductive cord |
WO2018116161A1 (en) | 2016-12-19 | 2018-06-28 | Intento Sa | Electrode and connector assemblies for non-invasive transcutaneous electrical stimulation and biological signal sensing |
TWI738954B (en) * | 2018-01-18 | 2021-09-11 | 遠東新世紀股份有限公司 | Textile with conductive patterned structures |
KR20220116228A (en) * | 2019-12-12 | 2022-08-22 | 위브쓰리디 인코퍼레이티드 | Interlaced composites integrated with transmission materials and methods of fabrication thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7064299B2 (en) * | 2003-09-30 | 2006-06-20 | Milliken & Company | Electrical connection of flexible conductive strands in a flexible body |
EP2206813B1 (en) * | 2009-01-09 | 2015-05-20 | Strähle + Hess GmbH | Conductive heating textile and interior component for motor vehicles with a conductive heating textile |
-
2013
- 2013-03-13 BE BE2013/0162A patent/BE1021658B1/en not_active IP Right Cessation
-
2014
- 2014-03-03 RU RU2015143622A patent/RU2015143622A/en not_active Application Discontinuation
- 2014-03-03 CN CN201480008820.3A patent/CN104995344B/en not_active Expired - Fee Related
- 2014-03-03 WO PCT/EP2014/054088 patent/WO2014139825A2/en active Application Filing
- 2014-03-03 EP EP14708840.5A patent/EP2971302B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
CN104995344A (en) | 2015-10-21 |
EP2971302B1 (en) | 2018-08-29 |
CN104995344B (en) | 2018-01-26 |
BE1021658B1 (en) | 2015-12-22 |
WO2014139825A2 (en) | 2014-09-18 |
WO2014139825A3 (en) | 2014-11-20 |
RU2015143622A (en) | 2017-04-18 |
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