Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
  • H01B3/002—Inhomogeneous material in general
  • H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
• • 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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
  • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
  • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/30—Windings characterised by the insulating material
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/32—Windings characterised by the shape, form or construction of the insulation
  • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/16—Synthetic fibres, other than mineral fibres
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
  • D06M2200/30—Flame or heat resistance, fire retardancy properties
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2631—Coating or impregnation provides heat or fire protection
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2926—Coated or impregnated inorganic fiber fabric
  • Y10T442/2992—Coated or impregnated glass fiber fabric

Definitions

• the invention relates to an insulating tape material, in particular one for the production of electrical insulation paper such as mica paper, which is contained in thermally conductive insulating tapes, which are used for example in high-voltage insulation.
• Thermally conductive insulating tapes are for example as
• Electrical machines such as motors and generators, have electrical conductors, electrical insulation and a stator core.
• the purpose of the insulation is to electrically insulate the conductors against each other, against the stator core and against the environment.
• cavities may form at the interfaces between the insulation and the conductor or between the insulation and the stator lamination packet, in which sparks may form due to partial electrical discharges.
• sparks may form due to partial electrical discharges.
• so-called "treeing" channels can form in the insulation, as a result of the "treeing" channels electrical breakdown can occur through the insulation.
• a barrier against the partial discharges is achieved by the use of mica in the insulation, which has a high partial discharge resistance.
• the mica is used in the form of platelet-shaped mica particles having a conventional particle size of several 100 microns to several millimeters, the mica particles being processed into a mica paper.
• the platelet-shaped mica particles are arranged in layers, so that the particles largely parallel to each other anord ⁇ nen, wherein directly superimposed mica particles overlap to form contact surfaces. Between the contact surfaces formed as a result of van der Waals forces and hydrogen bonding interactions from which, and thus give the mica paper, a high mechanical load-bearing capacity Be ⁇ a stable form.
• the mica paper When making the insulation, the mica paper is wrapped around the conductor to be insulated and impregnated with a resin. Subsequently, the composite of the resin and the mica paper is cured.
• the mica paper can be applied to a carrier fabric of glass or polyester, wherein the carrier fabric gives the mica paper additional stability.
• An improvement in the heat conduction could be achieved both by a reduction in the thickness of the insulation and by an improved thermal conductivity of the insulation. It is known to use platelet-shaped aluminum oxide particles instead of the platelet-shaped mica particles, with aluminum oxide having about 25 to 40 W / mK has a significantly higher thermal conductivity than mica.
• insulating tapes are known, for example, include a Ge ⁇ weave and mica, wherein an adhesive connects the two components to form a corona protection tape.
• the heat conductivity of ⁇ usually employed, with Epoxidhar ⁇ zen impregnated mica tape with glass or polyester fabric as a support material, is approximately 0.2 to 0.25 W / mK at room temperature, which is pure mica, however, at about 0 , 5 W / mK.
• Functionalizing agent which is distributed in the carrier fluid and in the dispersion has a mass fraction which corresponds to a predetermined Mas ⁇ sen ratio based on the mass fraction of the particles; Producing a sediment by sedimentation of the dispersion, whereby the platelet-shaped
• Particles are arranged substantially layer-like plane-parallel in the Bo ⁇ densatz; Removing the carrier fluid from the sediment; Introduction of energy in the dregs to overcome the activation energy that chemical reaction of the functionalizing agent with the particles via the functionalizing from the sediment forming the particulate composite under domes of the particles, wherein the Mas ⁇ seneat is previously determined such that the
• Particle composite has a porous structure.
• the coupling of the particles formed in this way intensifies the interactions of the particles with one another, so that advantageously the
• Particle composite has sufficient strength for Textilher ⁇ position.
• a disadvantage of the method is that although a mica-alumina tape is produced by filtration process, but this is subsequently connected to a strength-enhancing fiber sersupport, wherein an adhesive is used, which usually fills the mesh of the strength-increasing fiber composite.
• an adhesive is used, which usually fills the mesh of the strength-increasing fiber composite.
• the object of the present invention is therefore to align the arrangement of platelet-shaped thermally conductive particles in a fiber composite, in particular to align them in parallel, so that thermal conductivity paths form within the fiber composite.
• Solution to the object and subject of the present invention is an insulating tape material comprising a particle composite and a fabric, wherein the interstices of the fabric are filled with the particle composite.
• subject of the invention It ⁇ a process for preparing a filled insulating tape, the following process steps comprising: mixing a dispersion of platelet-shaped particles with a carrier fluid; Producing a sediment by sedimentation of the dispersion, whereby the platelet-shaped particles are arranged substantially in a plane-parallel plane in the sediment; Introducing a tissue into the sediment and removing the carrier fluid from the sediment.
• the use of the insulating tape material for producing an insulation for the protection of overvoltages and / or breakdowns of electric motors, high voltage machines and / or (high voltage) generators is the subject of the invention.
• the fabric is in a net shape, so that in the network structure meshes are present.
• the environmentally particle composite plate-like particles, in particular ⁇ sondere summarizes preferably having an aspect ratio of at least 50, that is, the ratio of plate length to platelet thickness is at least 50th
• platelet-shaped particles of the particle composite good heat ⁇ conductive.
• a functionalizing agent on mixing the dispersion of flake-like particles with the carrier fluid yet been ⁇ is dispersed in the carrier fluid and in the dispersion has a mass portion which, based on the mass fraction of the particles to a predetermined mass ratio ent ⁇ speaks.
• the particles Prior to mixing the dispersion, the particles are preferably formed with a substantially monomolecular thin film on the surface of the particles, wherein the thin film is made of another functionalizing agent.
• the chemical reaction for coupling the particles occurs between the thin film and the functionalizing agent.
• the dispersion of the particles with the substantially monomolecular thin film and the carrier fluid preference is given to particles which have a substantially monomolecular thin layer which is different from the thin layer of the particles originally present in the dispersion.
• the chemical reaction for coupling the particles occurs between two or more different thin films.
• the particles are preferably chosen such that they have Alumi ⁇ niumoxid.
• An advantage of the alumina is its high thermal conductivity compared to mica.
• a process step is added after removal of the carrier fluid from the bottom ⁇ rate, in the sediment energy in the sediment to overcome the activation energy of that chemical reaction of the functionalizing agent with the particles under the domes of the particles via thejana ⁇ ltechniksstoff from the sediment forms the particle composite from ⁇ introduced, wherein the mass ratio is determined in such a way before ⁇ that the particle composite has a porous structure.
• the functionalizing agent is preferably selected such that it is a plastic, in particular a thermoplastic.
• the plastic is preferably chosen such that it is a polyolefin alcohol, in particular polyethylene glycol or a not completely hydrolyzed polyvinyl alcohol having a molecular weight between 1000 and 4000, or a
• the functionalizing agent is preferably selected such that it is an alkoxysilane and forms a substantially monomolecular thin film on the particle surface.
• the alkoxysilane is preferably selected such that it has epoxide groups, in particular 3-glycidoxypropyltrimethoxysilane, or amino groups, in particular 3-aminopropyltriethoxysilane.
• the functionalizing agent is preferably selected such that it has particles, in particular nanoparticles of silicon dioxide, which carry superficial epoxide functionalities.
• the inventive method is preferably such Runaway ⁇ causes the energy to overcome the activation energy in the form of heat and / or radiation is supplied to the sediment with the tissue.
• the inventive Method preferably carried out such that the removal of the carrier fluid by filtration and subsequent supply of heat takes place.
• the removal of the solvent by Zu ⁇ drove of heat and the supply of heat to overcome the activation energy can be carried out advantageously in a process ⁇ step.
• the carrier fluid is preferably selected such that it is water.
• the removal of the sediment is carried out after the addition of the tissue by filtration, so that the platelet-shaped particles are sucked through the tissue.
• the carrier fluid is preferably a solvent in which the functionalizing agent is soluble, wherein the functionalizing agent is dissolved in the solvent.
• the func ⁇ naltechnischsstoff is preferably selected such that it ei surface ⁇ ne substantially monomolecular thin film on the top of the particles formed. The chemical reaction for coupling the particles takes place between the thin layers.
• the tissue has in comparison to the platelet-shaped particles, for example to alumina and / or Glim ⁇ mer particles, a poorer thermal conductivity and therefore limits the Inteldorfleiten the composite according to the prior art.
• the stitches in the fabric net are filled with adhesive, so that there is a strong impediment to the heat flow at these points. If, as a result of the modification of the production process, these fabric meshes are filled with heat-conducting particles, that is to say, for example, with aluminum oxide particles, bridges with good heat conductivity are formed in the fabric meshes or fiber interstices so that the overall thermal conductivity of the composite increases. Tests have shown that this increases the overall thermal conductivity of a fully impregnated alumina-glass fabric composite from 0.4 W / mK to 0.48 W / mK. This equates to an increase in thermal conductivity of 20%.
• Figure 1 shows the SEM micrographs of an alumina-Galsmaschine material made in accordance with the invention.
• FIG. 1 shows a detail of Figure 1, wherein a filled mesh of the net-like fabric can be seen.
• the meshes shown are filled according to the prior art with adhesive, which is usually poorly heat-conducting, because the composite between platelet-shaped particles and tissue only after producing the - advantageously porous ⁇ particle composite according to EP11164882 by adding the net-like Tissue and an adhesive took place.
• the invention relates to an insulating tape material, method for producing and use thereof, in particular one for the production of electrical insulation paper such as mica paper, which is contained in thermally conductive insulating tapes, which are used for example in high-voltage insulation.
• the insulating tape material has a Faserverstmaschine ⁇ effect by a tissue, wherein the meshes of the fabric by a - preferably thermally conductive - particle composite ge ⁇ are filled.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Power Engineering (AREA)
• Inorganic Chemistry (AREA)
• Ceramic Engineering (AREA)
• Textile Engineering (AREA)
• Insulating Bodies (AREA)
• Laminated Bodies (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Paper (AREA)

Applications Claiming Priority (2)

Publications (1)

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Citations (2)

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• 2012
  • 2012-05-07 DE DE102012207535A patent/DE102012207535A1/de not_active Ceased
• 2013
  • 2013-04-04 IN IN7827DEN2014 patent/IN2014DN07827A/en unknown
  • 2013-04-04 CN CN201380024070.4A patent/CN104321829B/zh not_active Expired - Fee Related
  • 2013-04-04 RU RU2014149116A patent/RU2608543C2/ru not_active IP Right Cessation
  • 2013-04-04 WO PCT/EP2013/057127 patent/WO2013167327A1/de active Application Filing
  • 2013-04-04 EP EP13717222.7A patent/EP2815406A1/de not_active Withdrawn
  • 2013-04-04 US US14/399,243 patent/US20150140885A1/en not_active Abandoned

Patent Citations (2)

Non-Patent Citations (1)

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