EP2294253A2 - Verfahren zur herstellung leitfähiger verbundfasern, in diesem verfahren hergestellte fasern und verwendung solcher fasern - Google Patents

Verfahren zur herstellung leitfähiger verbundfasern, in diesem verfahren hergestellte fasern und verwendung solcher fasern

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Publication number
EP2294253A2
EP2294253A2 EP09772726A EP09772726A EP2294253A2 EP 2294253 A2 EP2294253 A2 EP 2294253A2 EP 09772726 A EP09772726 A EP 09772726A EP 09772726 A EP09772726 A EP 09772726A EP 2294253 A2 EP2294253 A2 EP 2294253A2
Authority
EP
European Patent Office
Prior art keywords
conductive
fibers
temperature
composite material
fibers according
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
Application number
EP09772726A
Other languages
English (en)
French (fr)
Other versions
EP2294253B1 (de
Inventor
Patrice Gaillard
Patrick Piccione
Pierre Miaudet
Philippe Poulin
Carine Perrot
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.)
Centre National de la Recherche Scientifique CNRS
Arkema France SA
Original Assignee
Centre National de la Recherche Scientifique CNRS
Arkema France SA
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 Centre National de la Recherche Scientifique CNRS, Arkema France SA filed Critical Centre National de la Recherche Scientifique CNRS
Publication of EP2294253A2 publication Critical patent/EP2294253A2/de
Application granted granted Critical
Publication of EP2294253B1 publication Critical patent/EP2294253B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides

Definitions

  • the invention relates to a process for producing conductive composite fibers such as conductive fibers based on thermoplastic polymer and conductive or semiconducting particles, the particles possibly being carbon nanotubes (CNTs).
  • the invention also relates to composite conductive fibers obtained from said process and uses of such fibers.
  • Carbon nanotubes are known and used for their excellent properties of electrical and thermal conductivity as well as their mechanical properties. They are thus increasingly used as additives to bring to materials including those of macromolecular type these electrical, thermal and / or mechanical properties. It is known that the charge rate necessary for the electrical conduction of composite materials decreases sharply with the increase in the aspect ratio of the conductive particles, which is why it is preferred to use carbon nanotubes with respect to carbon black or carbon black. another form of carbon material.
  • the percolation threshold increases with the orientation of the carbon nanotubes as appears in the following document: F. Du, JE Fischer, KI Winey,
  • the process used for the fabrication of composite fibers which consists of extruding the mixture through a die, can be carried out in the "nanotube alignment on the percolation conductivity in carbon nanotube / composite polymer" process. induce an alignment of the carbon nanotubes parallel to the axis of the fiber.
  • fiber processing processes such as extrusion and / or stretching may induce orientation of the conductive particles in the fiber axis.
  • the concentration of NTC required to reach the percolation threshold of a composite in fiber form can be up to an order of magnitude higher than in the form of films or non-oriented fibers.
  • the consequence of this orientation phenomenon is that it is necessary to increase the rate of CNTs to make the conductive composites, especially when these composites are used in the form of fibers.
  • patent EP 1 181 331 describes a process for manufacturing a composite material based on thermoplastic polymer whose mechanical properties are reinforced by the presence of nanotubes.
  • a mixture of thermoplastic polymer and CNT is produced, then stretching the mixture at the melting temperature of the polymer and then a new drawing in the solid state (cold). Fibers can thus be obtained from this reinforced polymer material.
  • the stretching step performed after forming a fiber when it is 50% or more, degrades the conductivity properties, of course in the case where the composite material or the fibers made of composite material have conductive properties.
  • the object of the present invention is to overcome the disadvantages of the various processes mentioned in order to improve the electrical properties of the conductive composite fibers or to make initially insulating fibers conductive.
  • This object is achieved by the method of manufacturing fibers made of composite material in which the heat treatment step is performed with a temperature undergoing a gradual rise.
  • the invention more particularly relates to a fiber manufacturing process consisting of a composite material based on thermoplastic polymer and conductive or semiconductive particles, comprising a heat treatment, said heat treatment consisting of in a heating of the composite material made with a gradual rise in temperature.
  • the gradual increase in temperature is made according to a ramp preferably less than 50 ° C. per minute, preferably less than 30 ° C. per minute, preferably less than 100 ° C. per minute.
  • the gradual rise in temperature is made according to a ramp equal to 5 ° C per minute.
  • the required heating temperature is greater than or equal to the glass transition temperature of the thermoplastic polymer.
  • the heating temperature is at or above the melting temperature of the thermoplastic polymer when the level of conductive particles in the composite is decreased.
  • the heat treatment may be performed on the composite material during spinning and / or after spinning, the material constituting the formed fiber being then annealed.
  • the applied heating temperature is called the annealing temperature.
  • the heat treatment carried out with a gradual rise in the heating or annealing temperature has the effect of improving the conductive properties of the fibers obtained or making the initially insulating fibers conductive without the disadvantages of the treatments. thermally proposed so far and without causing degradation of the macroscopic structure of the fibers.
  • the conductive particles introduced into the composition of the fibers are chosen from the particles colloidal conductive or semiconductor in the form of rods, platelets, spheres, ribbons or tubes.
  • the conductive colloidal particles may be chosen from: carbon nanotubes, metals such as gold, silver, platinum,
  • Oxides such as: Vanadium (V 2 O 5), ZnO, ZrO 2, WO 3, PbO, In 2 O 3, MgO, Y 2 O 3,
  • the heating temperature is at least equal to the melting point of the polymer or higher.
  • the heating temperature is at least equal to the glass transition temperature of the polymer or higher.
  • the invention also relates to composite material fibers based on conductive or semiconducting particles and thermoplastic polymer.
  • the conductive particles can be:
  • the composite material based on thermoplastic polymer and carbon nanotubes comprises a mass content of CNT of less than 30%, preferably less than 20%, or of preferably between 10 and 0.1%.
  • the heat treatment according to the invention makes it possible to obtain a composite material constituting the fibers which has a volume resistivity of less than 10 E 12
  • Ohm. cm preferably less than 10 E 8 Ohm. cm, more preferably less than 10 E 4 Ohm. cm.
  • the thermoplastic polymer may be chosen from the group of polyamides, polyolefins, polyacetals, polyketones, polyesters or polyfluoropolymers or mixtures thereof and copolymers thereof.
  • the composite material constituting the fibers is based on a polyamide 6, a polyamide 12 or a polyester and contains a mass content of CNT of less than 30%.
  • the conductive fibers of composite material thus obtained can be used in the field of textiles, electronics, mechanics, electromechanics.
  • thermoplastic polymer and carbon nanotubes for reinforcing organic and inorganic matrices, protective clothing.
  • helmets, helmets, ...) military applications including ballistic protection, antistatic coatings, conductive textiles, antistatic fibers and textiles, electrochemical sensors, electromechanical actuators, electromagnetic shielding applications, packaging, bags etc.
  • the conductive fibers according to the present invention may in particular be used for the production of deformation sensors.
  • Other features and advantages of the invention will become clear from reading the description which is given below and which is given by way of illustrative and nonlimiting example and with reference to the figures in which: FIG. evolution of the relative resistivity of a PA6 / NTC composite fiber as a function of temperature,
  • FIG. 2 shows the evolution of the resistivity of a PA6 fiber containing 20% of CNT during a heating cycle ranging from ambient temperature to 120 ° C. at a rate of 5 ° C./min, followed by a bearing at this temperature for one hour,
  • FIG. 3 presents the evolutions of the stress and the resistivity of fibers comprising 3% of CNT, heat-treated at 250 ° C. at a rate of 5 ° C./min, as a function of elongation
  • FIG. 4 shows the evolution of the stress and the resistivity of fibers comprising 10% of CNT, heat-treated at 250 ° C. at a rate of 5 ° C./min, as a function of elongation.
  • a material is considered in the present invention as conductive when its volume resistivity is less than 10 E 12 ohms. cm and insulation when its volume resistivity is greater than 10 E 12 ohms. cm. In many applications such as the dissipation of electrostatic charges values below 10 E 8 Ohm. cm are desired.
  • Conductive or semiconducting particles that can be used:
  • colloidal conductive or semiconducting particles in the form of rods, platelets, spheres, ribbons or tubes, such as:
  • Nickel, Molybdenum and their alloys or metal compounds are alloys or metal compounds.
  • Oxides Vanadium (V 2 O 5), ZnO, ZrO 2, WO 3, PbO, In 2 O 3, MgO, Y 2 O 3.
  • the carbon nanotubes that can be used in the present invention are well known and are as described for example in Plastic World Nov 1993 page 10 or in WO 86/03455. They include, but are not limited to, those having a relatively high aspect ratio, and preferably a size ratio of 10 to about 1000. In addition, the carbon nanotubes usable in the present invention preferably have a purity of 90% or higher.
  • Thermoplastic polymers that can be used are used:
  • thermoplastic polymers that may be used in the present invention are especially those prepared from polyamide, polyacetals, polyacrylic polyketones, polyolefins, polycarbonates, polystyrenes, polyesters, polyethers, polysulfones, polyfluoropolymers, polyurethanes, polyamideimides, polyarylates, polyarylsulfones, polyethersulfones, polyarylene sulfides, polyvinyl chlorides, polyetherimides, polytetrafluoroethylenes, polyetherketones, fluoropolymers and their copolymers or mixtures thereof.
  • Polystyrene can also be mentioned more particularly; polyolefins and more particularly polyethylene (PE), polypropylene (PP); polyamides, for example polyamides PA-6, PA-6, 6, polyamide 6 (PA-6) polyamide 6,6 (PA-6,6), polyamide 11 PA-II, polyamide 12 (PA-12); polymethyl methacrylate (PMMA); polyether terephthalate (PET); polyethersulfones (PES); polyphenylene ether (PPE); fluorinated polymers such as polyvinylidene fluoride (PVDF) or copolymers of VDF and HFE; acrylonitrile polystyrene (SAN); polyethylether ketones (PEEK); polyvinyl chloride
  • PVDF polyvinylidene fluoride
  • SAN acrylonitrile polystyrene
  • PEEK polyethylether ketones
  • polyurethanes consisting of flexible polyether blocks which are residues of polyetherdiols and rigid blocks (polyurethanes) which result from the reaction of at least one diisocyanate with at least one short diol; the short chain extending diol which may be chosen from the glycols mentioned above in the description; the blocks polyurethanes and the polyether blocks being linked by bonds resulting from the reaction of the isocyanate functions with the OH functions of the polyetherdiol; polyesterurethanes, for example those comprising diisocyanate units, units derived from amorphous polyester diols and units derived from a short chain-extending diol chosen for example from the glycols listed above; copolyamides such as polyamide block copolymers and polyether blocks (PEBA) resulting from the copolycondensation of polyamide sequences with reactive ends with polyether sequences with reactive ends, such as, inter alia 1) polyamide sequences with diamine chain ends with polyoxyalky
  • ABS acrylonitrile-butadiene-styrene
  • AES acrylonitrile-ethylene / propylene-styrene
  • MVS methyl methacrylate-butadiene-styrene
  • ABMS acrylonitrile-butadiene-methyl methacrylate-styrene
  • AS acrylonitrile-n- butylacrylate-styrene
  • modified polystyrene gums polyethylenes, polypropylenes, polystyrenes; cellulose acetate; polyphenyleneoxide, polyketone, silicone polymers, polyimides, polybenzimidazoles, polyolefin-type elastomers such as polyethylene, methylcarboxylate-polyethylene, ethylene-vinylacetate and ethylene- ethylacrylate, chlorinated polyethylenes; styrene-type copolymers such as styrene-buta
  • copolymers produced by controlled radical polymerization such as for example the SABuS (polystyrene-co-poly-butyl-co-polystyrene), MABuM (polymethyl methacrylate-co-polyacrylate-butyl-co-polymethylmethacrylate) copolymers and all their functionalized derivatives.
  • SABuS polystyrene-co-poly-butyl-co-polystyrene
  • MABuM polymethyl methacrylate-co-polyacrylate-butyl-co-polymethylmethacrylate
  • thermoplastic polymer is also meant any random, gradual or block copolymers made from the homopolymers corresponding to the above description.
  • the fiber manufacturing method corresponds to a spinning process known to those skilled in the art such as extrusion spinning process of a composite material based on thermoplastic polymer and carbon nanotubes.
  • the fibers can be made either from bare NTC (crude or washed or treated), or from NTC mixed with a polymer powder or NTC coated / mixed with a polymer or other additives.
  • the level of CNT in the composite material constituting the fibers is, according to the invention, less than 30%, less than 20% or even more preferably between 0.1 and
  • the invention therefore proposes a process which makes it possible to increase the conductivity of thermoplastic composite materials containing CNTs, especially when the composition contains CNT levels of less than 10%.
  • This effect is obtained surprisingly by modifying the heat treatment step of heating the composite material, this modification consisting of a gradual rise in temperature.
  • the invention proposes a method which makes it possible not to deteriorate or even to improve the conductivity of thermoplastic composite fibers containing CNTs and possibly stretched, or even to make initially insulating fibers conductive.
  • the spinning process comprises a first thermoplastic polymer extrusion step containing less than 30% of CNT, possibly followed by a stretching step.
  • the invention consists in carrying out heat treatment during spinning and / or after spinning. Heat treatment consists of a gradual increase in temperature.
  • Heat treatment consists of a gradual increase in temperature.
  • the conductivity of thermoplastic composite fibers containing CNTs is improved. From the various examples, it is also shown that initially insulating composite fibers can be made conductive by this method.
  • the resistivity of a thermoplastic composite fiber containing CNTs decreases during the rise in temperature and the level reached is maintained during the cooling step.
  • the improvement of the conductivity by this method is almost instantaneous. Holding for one hour at the required heating temperature does not significantly improve the level of conductivity then attained.
  • the examples described below show that a fixed temperature heat treatment is not very or not at all effective, while a heat treatment consisting of a gradual rise in the heating temperature systematically improves the conductivity of thermoplastic composite fibers. containing CNTs, in a range from 3% to 20% of CNTs. As can be seen, under certain conditions of heating temperature and charge rate in CNT, initially insulating fibers become even conductive.
  • the method makes it possible to manufacture conductive composite fibers based on thermoplastic polymer and carbon nanotubes (CNTs) comprising a CNT content of less than 30%, preferably between 0.1% and 10%.
  • the fibers obtained have a resistivity that is less than 10 E 12 Ohm. cm, preferably less than 10 E 8 Ohm. cm, more preferably less than 10 E 4 Ohm. cm.
  • the composite fibers are obtained by melt spinning a composite material based on conductive particles and thermoplastic polymer, as mentioned above.
  • the diameter of the fibers obtained is between
  • melt spinning for example electro spinning, spin spinning, etc.
  • polyamide fibers with different levels of CNT are polyamide fibers with different levels of CNT.
  • the fibers comprising 3% and 7% of CNT are based on PA12 AMNO TLD, those whose CNT level is 10% and 20% are based on of PA6 Donamid® 27.
  • the resistances are measured using a Keithley 2000 multimeter.
  • Example 1 Process conditions for improving the conductivity of composite fibers based on thermoplastic polymer and CNT, or for rendering electrically insulating fibers of this type.
  • fibers containing different levels of CNTs are considered. They are subjected to two different heat treatments in order to highlight the effects of the heat treatment according to the invention in improving the conductivity of the fibers. So the fibers are:
  • two annealing temperatures are considered to be 120 ° C., a temperature higher than glassy transition temperature of the polyamide, and 250 0 C, temperature above the melting temperature of the polyamide.
  • This table shows the comparison of the average resistivities p of PA-based composite fibers containing different levels of CNT, depending on the type of heat treatment received: either a 30-minute treatment at a fixed temperature or a treatment from room temperature. up to the annealing temperature at a rise rate of 5 ° C / min. In both cases, two annealing temperatures are considered, 120 ° C. and 250 ° C., and the average is obtained from three different samples. The resistivities are measured at room temperature with the exception of that at 120 ° C. in the case of treatment under a ramp at 5 ° C./min. pi: initial resistivity before heat treatment; -: the resistance is greater than the limit of detection.
  • annealing at a fixed temperature does not make it possible to make the fibers which initially are not, that is to say containing up to 10% of NTC.
  • the conductivity seems slightly improved by a fixed temperature annealing. But the annealing temperature does not seem to have any influence, the level of conductivity reached is not better at high temperature. It also remains an order of magnitude lower than that achieved through a gradual rise in temperature.
  • a heat treatment with a gradual rise rate of the temperature of 5 ° C./min is effective for all the composite fibers considered in a range of 3% to 20% of CNT. For the lowest charge rates (3% and 7%) it is necessary to reach a temperature above the melting temperature of the polymer. This heat treatment makes it possible to make fibers containing 10% of CNT conductive, and this as soon as possible.
  • Example 2 Typical Evolution of the Resistivity of a Composite Fiber Based on Thermoplastic Polymer and CNT During Heat Treatment
  • the following example relates to the typical evolution of the resistivity of a PA6 Donamid® 27 and CNT-based composite fiber, which is initially conductive, during a heat treatment ranging from room temperature to 250.degree. speed of 5 ° C / min.
  • a first cycle of heating is performed, then the fiber is cooled at a speed of about 2 ° C / min to a temperature below 50 ° C.
  • a second heating cycle identical to the first is then performed.
  • Figure 1 shows the typical evolution of the relative resistivity of a fiber as a function of temperature during such heat treatment.
  • Relative resistivity (p / pO) is the ratio between the resistivity p of the fiber at the temperature considered and its resistivity pO at ambient temperature.
  • Example 3 Effect of the annealing time on the resistivity of a composite fiber based on thermoplastic polymer and CNT.
  • the influence of the time parameter on the resistivity has been observed by the depositor insofar as the latter has realized that it is the gradual increase of the temperature which makes it possible to improve the conductivity whereas until there, the heat treatment was carried out at a fixed temperature.
  • NTC is placed in a thermal chamber where it is heated from room temperature up to 120 0 C at a speed of 5 ° C / min, then maintained at this temperature for one hour.
  • FIG. 2 The evolution of the resistivity recorded over time is presented in FIG. 2. This is the evolution of the resistivity of a PA6 fiber containing 20% of CNT during a heating cycle ranging from room temperature up to 120 0 C at a rate of 5 ° C / min, followed by a plateau at this temperature for one hour.
  • Example 4 Use of composite fibers based on thermoplastic polymer and thermally treated NTC as deformation sensor.
  • This example shows the evolution of the resistivity of composite fibers annealed in-situ as a function of stretching.
  • the heat-treated fiber is glued on a paper test-tube.
  • the multimeter is connected to the fiber by two copper wires also glued on the test piece, and the contact is provided by silver lacquer.
  • the fibers are stretched at a rate of 1% deformation per minute and the resistance is recorded at the same time as the tensile test. We can therefore deduce the evolution of the resistivity as a function of 1 ⁇ elongation, taking care to correct the diameter of the fiber by elongation.
  • FIGS. 3 and 4 show the evolution of the stress and the resistivity of fibers comprising respectively 3% and 10% of CNT, heat-treated at 250 ° C at a rate of 5 ° C / min, depending on the elongation. These two quantities are "corrected", that is to say that the variation of the section with elongation has been taken into account.
  • the resistivity of the fiber after a slight decrease, increases with elongation until the fiber breaks.
  • the variation of the electrical properties under mechanical stress therefore allows applications as deformation or stress sensors.
  • metal fibers are difficult to weave, they are heavy and can be degraded by corrosion. They are not very suitable for the production of technical textiles or lightweight and high performance garments, unlike the composite fibers according to the invention.
  • carbon fibers these have a high electrical conductivity and a high tensile strength in the axis of the fiber. However, they lack flexibility and can be woven only by specific methods unlike composite fibers according to the invention. In addition the carbon fibers are not suitable for applications in which they would be subject to strong deformations (stretching, folding, knotting).
  • the composite conductive fibers according to the invention constitute a fifth category which bypasses the weaknesses of the fibers previously described, the table below illustrating the properties in the various cases.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Reinforced Plastic Materials (AREA)
  • Multicomponent Fibers (AREA)
  • Woven Fabrics (AREA)
  • Wrappers (AREA)
EP09772726A 2008-07-03 2009-06-25 Verfahren zur herstellung leitfähiger verbundfasern, in diesem verfahren hergestellte fasern und verwendung solcher fasern Not-in-force EP2294253B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0854512A FR2933426B1 (fr) 2008-07-03 2008-07-03 Procede de fabrication de fibres conductrices composites, fibres obtenues par le procede et utilisation de telles fibres
PCT/FR2009/051225 WO2010001044A2 (fr) 2008-07-03 2009-06-25 Procede de fabrication de fibres conductrices composites, fibres obtenues par le procede et utilisation de telles fibres

Publications (2)

Publication Number Publication Date
EP2294253A2 true EP2294253A2 (de) 2011-03-16
EP2294253B1 EP2294253B1 (de) 2011-11-02

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EP09772726A Not-in-force EP2294253B1 (de) 2008-07-03 2009-06-25 Verfahren zur herstellung leitfähiger verbundfasern, in diesem verfahren hergestellte fasern und verwendung solcher fasern

Country Status (11)

Country Link
US (1) US20110147673A1 (de)
EP (1) EP2294253B1 (de)
JP (1) JP2011526660A (de)
KR (1) KR20110015673A (de)
CN (1) CN102144056A (de)
AT (1) ATE531838T1 (de)
BR (1) BRPI0914771A2 (de)
ES (1) ES2376037T3 (de)
FR (1) FR2933426B1 (de)
MX (1) MX2010014175A (de)
WO (1) WO2010001044A2 (de)

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ATE531838T1 (de) 2011-11-15
FR2933426B1 (fr) 2010-07-30
US20110147673A1 (en) 2011-06-23
WO2010001044A3 (fr) 2010-02-25
CN102144056A (zh) 2011-08-03
KR20110015673A (ko) 2011-02-16
JP2011526660A (ja) 2011-10-13
EP2294253B1 (de) 2011-11-02
FR2933426A1 (fr) 2010-01-08
BRPI0914771A2 (pt) 2019-09-24
MX2010014175A (es) 2011-03-29
ES2376037T3 (es) 2012-03-08

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