WO2008116537A1 - Matériau conducteur composite - Google Patents

Matériau conducteur composite Download PDF

Info

Publication number
WO2008116537A1
WO2008116537A1 PCT/EP2008/001334 EP2008001334W WO2008116537A1 WO 2008116537 A1 WO2008116537 A1 WO 2008116537A1 EP 2008001334 W EP2008001334 W EP 2008001334W WO 2008116537 A1 WO2008116537 A1 WO 2008116537A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
conducting material
composite conducting
stitches
composite
Prior art date
Application number
PCT/EP2008/001334
Other languages
English (en)
Inventor
Torbjörn ENG
Kjell Eng
Original Assignee
Eng-Tex Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eng-Tex Ab filed Critical Eng-Tex Ab
Priority to EP08707780A priority Critical patent/EP2140054A1/fr
Publication of WO2008116537A1 publication Critical patent/WO2008116537A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work fabrics
    • D04B21/12—Open-work fabrics characterised by thread material
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K79/00—Methods or means of catching fish in bulk not provided for in groups A01K69/00 - A01K77/00, e.g. fish pumps; Detection of fish; Whale fishery
    • A01K79/02—Methods or means of catching fish in bulk not provided for in groups A01K69/00 - A01K77/00, e.g. fish pumps; Detection of fish; Whale fishery by electrocution
    • 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
    • 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
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/02—Cross-sectional features
    • D10B2403/024—Fabric incorporating additional compounds
    • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
    • D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics

Definitions

  • a composite conducting material according to the preamble of claim 1 , which is characterized in that the fabric has a structure that is expandable and that the at least one electrically conducting element is associated with the fabric in such a way that the composite conducting material is expandable.
  • the fabric is knitted and the at least one electrically conducting element is associated to the fabric by being knitted into the fabric.
  • the fabric and the conducting element By knitting the fabric and the conducting element, a strong and cost-efficient expandable structure can be received for the composite conducting material.
  • the expandable structure of the fabric can be received by arranging the fabric such that it comprises a number of pillar stitches arranged side by side, wherein each pillar stitch in its extension direction has groups of consecutive free stitches alternated with groups of consecutive connection stitches, the connection stitches being connected to one of the pillar stitch's neighboring pillar stitches. In this way a net structure is achieved.
  • the free stitches will be more aligned in that direction. This can be achieved by quite simply pulling the fabric in the direction in which an extension is required. The more free stitches the fabric has in relation to the number of connection stitches attached to a neighboring pillar stitch, the more expandable is the fabric.
  • the at least one conducting element comprises a number of conductors associated with the fabric such that the number of conductors have a substantially parallel extension direction.
  • the composite conductive material can be expanded in at least a direction transversal to the extension direction of the conductors, without the conductors limiting the expansion possibilities.
  • This also implies that the distance between each conductor will increase when the composite conducting material is expanded.
  • the amount of energy transmitted per area can be decreased without changing the current flowing through each conductor.
  • This fact can be used for accomplishing pieces of the material with different energy density from the same manufactured piece of material. As a result, flexibility is achieved such that a lower amount of different standard pieces has to be manufactured for different applications. In an equivalent way, the amount of energy can be increased by compressing the material.
  • neighboring conductors are associated with the fabric such that they come into contact with each other at selected places in the material.
  • the selected places are evenly spread in the material, ensuring an even distribution of energy at a breakage of a conductor.
  • the selected places are the places where neighboring pillar stitches are connected to each other.
  • the method further comprises the steps of arranging a number of threads, such as warp threads, of the fabric side by side and arranging a number of electrically conducting elements side by side, mixed with the threads, before the steps of manufacturing and associating are performed.
  • a stitched composite conducting material can be manufactured by the same manufacturing machine as used for manufacturing the fabric, which may be a machine that can be used for ordinary fabric stitching.
  • Figure 1 illustrates a schematic view of an expandable knitted structure of a fabric used as base material in a composite conducting material according to the invention.
  • Figure 7 shows a front view of a composite conducting material where for a part of the material, the electrical conductors are separated from the fabric.
  • Figure 8 shows a flow chart of a method of the invention.
  • each pillar stitch 11a-d alternately connecting groups of two connection stitches 13 to each pillar stitch's first and second neighboring pillar stitches and separating alternately connected groups of connection stitches by at least one free stitch 12
  • the thus created fabric will receive a net structure that can be expanded in a direction. If the fabric is expanded in e.g. a direction transversal to an extension direction of the pillar stitches, the free stitches will be directed more into the transversal direction whereby the fabric will be expanded in that direction. At the same time, the fabric will be compressed in the extension direction.
  • the expression pillar stitch is used for describing a row of stitches in a stitched fabric.
  • the expression pillar stitch would be similar to the expression row of wales.
  • Figure 2 shows an embodiment of a composite conducting material according to the invention.
  • the material comprises a fabric 10 stitched such that it has an expandable net structure.
  • the fabric 10 is stitched in a different way than the fabric shown in figure 1.
  • the fabric 10 comprises a number of pillar stitches 11a-11d arranged side by side. Each pillar stitch is stitched into its neighboring pillar stitches such that a fabric in shape of a net structure is created.
  • the fabric 10 comprises a number of free stitches 12 and a number of connection stitches 13, connecting a pillar stitch to one of its neighboring pillar stitches.
  • the material also comprises a number of electrically conducting elements 20 in shape of a number of metal wires.
  • the electrically conducting elements 20 are arranged to the fabric 10 such that the electrically conducting elements have an extension direction that is substantially parallel with the extension direction of the threads of the fabric, i.e. the pillar stitches of the fabric.
  • Figures 5 and 6 illustrate the expandability of a composite conducting material according to the invention that has a net structure.
  • the composite conducting material comprises a fabric that has been stitched into a net structure and a number of conductors stitched into the fabric in such a way that the conductors are integrally arranged in the fabric.
  • Figure 6 shows the material in an unexpanded state and figure 5 shows the material when it has been expanded in a horizontal direction in the figure.
  • Figure 7 shows another embodiment of the invention.
  • a sheet of composite conducting material according to the invention can be produced that has a first part 40 consisting of the composite conducting material, i.e. comprising an expandable fabric with associated electrically conducting elements, and a second part 50 where the electrically conducting elements are not associated with the expandable fabric.
  • the second part is intended to be used for easily creating connections for connecting a current source to the composite conducting material.
  • Such a sheet can be cost-efficiently manufactured since a sheet can be manufactured in one process comprising a number of first and second parts occurring at repeated intervals in the material.
  • the flat plate 60 in figure 7 is not a part of the invention. It is only shown for illustrative purposes, to better illustrate that in the second part, the electrically conducting elements are actually separated from the fabric.
  • the threads may be warp threads. In the step of manufacturing the fabric, the threads are stitched into pillar stitches.
  • the steps of manufacturing 103 and associating 104 may be performed in any relative order or simultaneously.
  • the step of manufacturing may be performed by stitching the threads into pillar stitches that are connected to neighboring pillar stitches such that each pillar stitch has a number of free stitches and a number of connection stitches, wherein the connection stitches are directly connected to a neighboring pillar stitch.
  • the connection stitches may be arranged in groups comprising consecutive connection stitches.
  • the free stitches may be arranged in groups of consecutive stitches.
  • the stitching may be performed such that each pillar stitch has alternating groups of consecutive free stitches and consecutive connection stitches, where every second group of connection stitches of a pillar stitch is connected to a first neighboring pillar stitch and every other second group of connection stitches of the pillar stitch is connected to a second neighboring pillar stitch.
  • Each of the at least one electrically conducting element may be associated with the fabric such that the at least one electrically conducting elements is integrated in a pillar stitch of the fabric.
  • the fabric 10 may be knitted in any way that makes it expandable; for this reason it may be e.g. warp-knitted or weft-knitted into a net structure.
  • the fabric may be a knotted net.
  • the fabric comprises threads that are tied together at each connection area.
  • the fabric may have any kind of expandable structure, such as a net structure or a mesh structure.
  • the composite conducting material is preferably an elongate sheet material.
  • the electrically conducting elements 20 could be associated with the material in any way that will not prevent the composite conducting material from being expandable.
  • the composite conducting material according to the invention may be used for any type of application regarding transfer of energy through a medium, such as in an electro-osmosis procedure.
  • the material may be used for electro-osmosis to speed up a composting process in e.g. a basin or a stack of sludge.
  • an electrode in shape of e.g. a number of pipes may be arranged in the bottom of the basin or the stack and an electrode made of a piece of the composite conducting material according to the invention will be arranged in or at the top of the sludge.
  • a voltage will be applied over the electrodes, whereby the pipes will function as an anode and the composite conducting material will function as a cathode, such that water in the sludge will be transferred to the pipes and transported away from the sludge via the pipes.
  • the composite conducting material might be used in similar ways for other applications where an electro-osmosis procedure would be beneficial, e.g. for de-watering grounds, such as a football field, or for watering grounds, such as a field for growing vegetables.
  • the composite conducting material is as a net for marine applications, e.g. for protecting fish cultures from predators.
  • the composite conducting material will function as an electrode arranged on the outside of a fish culture.
  • AC- or DC-current will be applied to the material and surrounding water will function as a corresponding electrode.
  • An approaching predator fish would be unpleasantly affected by the electricity, or even get an electrical shock when at a close distance to the net, and will therefore be scared off from the fish culture.
  • the composite conducting material would prevent building up of algae on surrounding wall of a fish culture. For this reason, the composite conducting material according to the invention might also find use around hulls of boats.
  • Yet another type of possible application of the composite conducting material according to the invention is as an electrode in a capacitor for storing energy in a medium such as in the ground.
  • Still another type of possible application of the composite conducting material according to the invention is as an electrode in a photovoltaic cell or as a part of a photovoltaic cell.
  • the electrode elements of a composite conducting material are coated with a metal oxide to decrease oxidation at the surface of the electrode elements.
  • a type of electrically conducting impregnation means is used to impregnate the composite conducting material when it is manufactured or after it has been manufactured.
  • the electrically conducting impregnation means may either be applied to the electrical conductors before the material is manufactured, or to the composite conducting material comprising the conductors after the material has been manufactured. In the latter case, both the fabric and the electrical conductors are coated (impregnated) with the impregnation means.
  • Such an impregnation means would be arranged to prevent oxidation at the surface of the electrical conductors.
  • the impregnation means is cost-efficient as such. Also, the resulting impregnated composite conducting material would have a high resistance to corrosion. In addition, the impregnated composite conducting material would be more cost-efficient to produce than the composite conducting material shown in WO2006/048594.
  • the impregnation means may be a flexible thermoplastic solution or dispersion comprising carbon suspended in the solution or dispersion.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)

Abstract

La présente invention concerne un matériau conducteur composite permettant le transfert d'énergie et un procédé de production d'un tel matériau. Le matériau conducteur composite comporte un tissu (10) constituant un matériau de base pour le matériau conducteur composite et au moins un élément conducteur d'électricité (20) associé au tissu. Le tissu (10) est caractérisé en ce qu'il présente une structure qui est expansible et en ce que ledit élément conducteur d'électricité (20) est associé au tissu de sorte que le matériau conducteur composite soit expansible.
PCT/EP2008/001334 2007-03-28 2008-02-19 Matériau conducteur composite WO2008116537A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08707780A EP2140054A1 (fr) 2007-03-28 2008-02-19 Matériau conducteur composite

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0700789-1 2007-03-28
SE0700789 2007-03-28

Publications (1)

Publication Number Publication Date
WO2008116537A1 true WO2008116537A1 (fr) 2008-10-02

Family

ID=39387180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/001334 WO2008116537A1 (fr) 2007-03-28 2008-02-19 Matériau conducteur composite

Country Status (2)

Country Link
EP (1) EP2140054A1 (fr)
WO (1) WO2008116537A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967415A (en) * 1957-06-13 1961-01-10 Goodyear Tire & Rubber Electrical heating element
EP0463516A2 (fr) * 1990-06-28 1992-01-02 Wärme- Und Elektrotechnik B. Ruthenberg Gmbh Elément de chauffage électrique de surface
US5082466A (en) * 1988-09-07 1992-01-21 Fabritec International Corporation Anti-static garment bag for reducing static buildup in the drycleaning process
US5151319A (en) * 1988-10-24 1992-09-29 Schoutteten & Froidure S.A. Electrified tape for enclosure fences
WO2004001903A2 (fr) * 2002-06-20 2003-12-31 Beacon Looms, Inc. Tricot electriquement conducteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967415A (en) * 1957-06-13 1961-01-10 Goodyear Tire & Rubber Electrical heating element
US5082466A (en) * 1988-09-07 1992-01-21 Fabritec International Corporation Anti-static garment bag for reducing static buildup in the drycleaning process
US5151319A (en) * 1988-10-24 1992-09-29 Schoutteten & Froidure S.A. Electrified tape for enclosure fences
EP0463516A2 (fr) * 1990-06-28 1992-01-02 Wärme- Und Elektrotechnik B. Ruthenberg Gmbh Elément de chauffage électrique de surface
WO2004001903A2 (fr) * 2002-06-20 2003-12-31 Beacon Looms, Inc. Tricot electriquement conducteur

Also Published As

Publication number Publication date
EP2140054A1 (fr) 2010-01-06

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