US3867245A - Electrical insulation - Google Patents

Electrical insulation Download PDF

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Publication number
US3867245A
US3867245A US26211372A US3867245A US 3867245 A US3867245 A US 3867245A US 26211372 A US26211372 A US 26211372A US 3867245 A US3867245 A US 3867245A
Authority
US
United States
Prior art keywords
electrical insulation
layer
resin
superimposed
paper
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.)
Expired - Lifetime
Application number
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English (en)
Inventor
Clairmont J Herman
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.)
Von Roll Isola USA Inc
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US26211372 priority Critical patent/US3867245A/en
Priority to CH819273A priority patent/CH558979A/xx
Priority to NL7307943A priority patent/NL175563C/xx
Priority to FR7320719A priority patent/FR2188258B1/fr
Priority to SE7308175A priority patent/SE412974B/xx
Priority to DE2329532A priority patent/DE2329532C3/de
Priority to ES415768A priority patent/ES415768A1/es
Priority to GB2797873A priority patent/GB1426575A/en
Priority to IT2506173A priority patent/IT988942B/it
Priority to CA174,435A priority patent/CA988405A/en
Application granted granted Critical
Publication of US3867245A publication Critical patent/US3867245A/en
Assigned to INSULATING MATERIALS INCORPORATED, ONE CAMPBELL RD., SCHENECTADY, NY 12306 A CORP. OF NY reassignment INSULATING MATERIALS INCORPORATED, ONE CAMPBELL RD., SCHENECTADY, NY 12306 A CORP. OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GENERAL ELECTRIC COMPANY
Assigned to CHEMICAL BANK reassignment CHEMICAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INSULATING MATERIALS INCORPORATED
Assigned to INSULATING MATERIALS, INCORPORATED reassignment INSULATING MATERIALS, INCORPORATED RELEASE BY SECURED PARTY OF THE SECURITY AGREEMENT RECORDED ON JUNE 10, 1988, AT REEL 4886, FRAMES 633-649. (SEE RECORD FOR DETAILS) Assignors: CHMEICAL BANK
Assigned to NORSTAR BANK OF UPSTATE NY reassignment NORSTAR BANK OF UPSTATE NY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INSULATING MATERIALS INCORPORATED, A CORP. OF NY
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/06—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/02—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica the layer of fibres or particles being impregnated or embedded in a plastic substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H01B3/421—Polyesters
    • H01B3/422—Linear saturated polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H01B3/423—Linear aromatic polyesters
    • 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
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
    • 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
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/10—Mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/249926—Including paper 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/251—Mica
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

  • This invention relates to composite insulating material. More particularly, it relates to new and improved insulating material in sheet or tape form and more spetos, mica flake and other inorganic flake material such as glass flakes, using glass or other inorganic fabric as a reinforcing medium, are well known.
  • such insulation containing woven fabric such as of glass cannot be conveniently wound on small conductors of the order of 50 mils in diameter without excessive fraying particularly at elevated temperatures where any organic bonding material would have been burned off.
  • Asbestos acts in much the same way as glass fabric in that it tends to fray and disintegrate unless bonded with an inorganic heat-resistant material such as ceramic which then renders the conductors inflexible and the insulation friable and physically delicate.
  • the use of mica flakes in such tapes is also limiting in that relatively small conductors cannot be conformably wound with the tape containing relatively large mica flakes.
  • a principal object, therefore, of the present invention is to provide such readily conformable and flexible electrical insulation which will retain suitable electrical insulating and physical characteristics at normal and elevated temperatures.
  • the present invention relates to electrical insulation in sheet or tape form which has a first or base layer of resin-impregnated mica paper, a second superimposed layer of a plurality of generally lengthwise disposed, flattened glass yarns, and optionally a third adherent layer of polymer or resin film.
  • the material is particularly characterized in that it can be wrapped conformably on relatively small conductors or structures and will remain flexible and retain its electrical insulating qualities even at elevated temperatures at which any organic resin binder or adhesive or impregnant would have been incinerated.
  • the mica paper or reconstituted mica which has been found to be useful in connection with the invention can be prepared by any of a number of processes including but not limited to those described in US. Pat. Nos.
  • mica paper can be of any desired thickness commensurate with the particular application, it has been found that particularly in the wrapping of small conductors of the order of 50 mils, such mica paper having a thickness of about 1.5 to 2 mils is preferred.
  • the glass yarn which is useful in connection with the invention ranges generally from about 0.5 mil in diameter to about 3 mils and is made up, typically, of bundles of filaments which are twisted in well known fashion to form the yarn. In actual use, the glass yarn is normally partially flattened as will be described hereinafter.
  • any of a number of resinous or polymer films can be used including the various polyesters, polysulfones, polyethylene, polypropylene, polybutylene, polystyrene, polyvinyl acetal, polyacrylate, cellulose acetate, cellulose acetobutyrate, polyvinyl acetal, polycarbonate, and the like, such film materials being well known to those skilled in the art.
  • any of a number of polymeric materials can be used to impregnate the mica paper layer and to adhere any overlying film to the substrate.
  • organic polysiloxanes which are in and of themselves relatively high temperature resistant materials.
  • Typical of those materials useful as an adhesive is General Electric organopolysiloxane SR-5l6 which is essentially a mixture of silanol stopped dimethylpolysiloxane having a viscosity of from about 1 million to 40 million cps at 45C and MO resin where M is (C a )s 112 Q is $10 and the ratio of M/Q is .55-.65/1
  • a typically useful mica paper impregnating material is General Electric SR-23l which is a 60 percent solution in xylene of a mixture of silanol stopped dimethylpolysiloxane fluid having a viscosity of to 1000 cps at 25C MQ resin as above, and additional MQ resin where the ratio of M/Q is .9-l/l, along with a small amount of catalyst such as cerium compound.
  • Mica paper having a thickness of about 1.7 mils was impregnated with the above SR-23l resin with a kiss coater and oven cured at a rate of about 10 ft/minute at C, the oven dwell time being about 5 minutes to give a final resin content ranging from about 1.5 to 4 percent by weight of the mica paper. It has been found that less than about 1.5 percent by weight of resin detracts from the water repellant characteristic of the mica paper which tends to disintegrate when exposed to moisture. On the other hand, over about 4 percent by weight of resin content tends to cause blocking of the mica paper when it is wound up.
  • the impregnated mica paper is next kiss coated with the above described SR-5l6 adhesive as a 15 percent solution in toluene and treated in an oven at a temperature of from about 40C to 100C and preferably at about 70C to remove most of the solvent and provide a tacky surface.
  • glass yarn having about 200 filaments each about 0.00035 inch in diameter is fed on to the tacky mica paper surface, the yarns being spaced to give about 18 to 20 yarns per inch, the composite material being immediately fed through nip rollers to flatten the glass yarns to the desired degree usually about one half the thickness.
  • unflattened glass yarns can be used in certain applications, they tend to make the finished product relatively thick.
  • the flattening disperses the glass filaments and provides more protection and reinforcement to the mica paper and with extreme flattening causes the glass filaments to cover essentially the entire surface of the mica paper and provides a high degree of resistance against puncture.
  • the optional surface film of mil Mylar polyethylene terephthalate polyester may be first lightly treated with the above adhesive and then superimposed on the substrate using a nip roller or other convenient pressing means to provide the finished product shown in the drawing.
  • a length of tape 1 with its first or base layer of micaceous paper 2 and reinforcing lengthwise disposed flattened glass yarns 3 is shown with the overlying resin film 4 partially removed.
  • the mica paper or paper of similar material provides an electrical insulating barrier which is supported and reinforced conformably by the glass yarns.
  • the overlying film of resinous material aids in conformably wrapping or taping the material particularlyv on small wires or conductors, this film as well as resin adhesives and impregnants being essentially or wholly removed if the insulated conductor is exposed to incinerating temperatures.
  • the finished insulation in the form of tape an be used to conformably wind or insulate relatively small wires of the order of 50 mils in diameter which can then be wound into strands or cables.
  • the insulation is suitable for use at ordinary temperatures with its dielectric strength of 1000 volts/mil, short time, step by step, using A inch electrodes, it is particularly suitable for use at elevated temperatures where the impregnating and adhesive material is substantially or wholly burned off or incinerated. It has been found that when so incinerated, strands or cables of such insulated wires substantially retain their flexibility and insulating qualities and are resistant to abrasion and physical punishment. This is as distinguished from prior art materials which, particularly at elevated temperatures, either lose their electrical insulating qualities or are inflexible or become severely deteriorated physically as well as electrically. The present insulation is particularly useful for thermocouple wires and the like.
  • Electrical insulating tape having a layer of resin impregnated micaceous paper, superimposed thereon a plurality of flattened glass yarns disposed in spaced, generally lengthwise parallel fashion and superimposed thereon a layer of polymer film.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Insulating Bodies (AREA)
  • Organic Insulating Materials (AREA)
  • Inorganic Insulating Materials (AREA)
  • Laminated Bodies (AREA)
US26211372 1972-06-12 1972-06-12 Electrical insulation Expired - Lifetime US3867245A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US26211372 US3867245A (en) 1972-06-12 1972-06-12 Electrical insulation
CH819273A CH558979A (de) 1972-06-12 1973-06-06 Flaechenfoermiges elektrisches verbundisolierelement.
NL7307943A NL175563C (nl) 1972-06-12 1973-06-07 Gelaagde elektrische isolatieband op basis van micapapier.
FR7320719A FR2188258B1 (enExample) 1972-06-12 1973-06-07
SE7308175A SE412974B (sv) 1972-06-12 1973-06-08 Elektriskt laminerat isoleringsband
ES415768A ES415768A1 (es) 1972-06-12 1973-06-09 Aislamiento electrico.
DE2329532A DE2329532C3 (de) 1972-06-12 1973-06-09 Mehrschichtiges flexibles Isolierband oder -blatt
GB2797873A GB1426575A (en) 1972-06-12 1973-06-12 Electrical insulation
IT2506173A IT988942B (it) 1972-06-12 1973-06-12 Materiale elettrico isolante
CA174,435A CA988405A (en) 1972-06-12 1973-06-19 Glass mica laminates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26211372 US3867245A (en) 1972-06-12 1972-06-12 Electrical insulation
CA174,435A CA988405A (en) 1972-06-12 1973-06-19 Glass mica laminates

Publications (1)

Publication Number Publication Date
US3867245A true US3867245A (en) 1975-02-18

Family

ID=25667296

Family Applications (1)

Application Number Title Priority Date Filing Date
US26211372 Expired - Lifetime US3867245A (en) 1972-06-12 1972-06-12 Electrical insulation

Country Status (8)

Country Link
US (1) US3867245A (enExample)
CA (1) CA988405A (enExample)
CH (1) CH558979A (enExample)
DE (1) DE2329532C3 (enExample)
FR (1) FR2188258B1 (enExample)
GB (1) GB1426575A (enExample)
NL (1) NL175563C (enExample)
SE (1) SE412974B (enExample)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091139A (en) * 1975-09-17 1978-05-23 Westinghouse Electric Corp. Semiconductor binding tape and an electrical member wrapped therewith
US4158078A (en) * 1977-06-10 1979-06-12 Huebner Bros. Of Canada Ltd. Heat strip or panel
US4265953A (en) * 1979-03-07 1981-05-05 Minnesota Mining And Manufacturing Company Intumescent stressed skin composite material
US4286010A (en) * 1979-10-05 1981-08-25 Essex Group, Inc. Insulating mica paper and tapes thereof
US4307145A (en) * 1981-02-11 1981-12-22 Goldman Daniel S Decorative fabric and method of making the same
US4381327A (en) * 1980-10-06 1983-04-26 Dennison Manufacturing Company Mica-foil laminations
US4407876A (en) * 1979-08-08 1983-10-04 Malcolm Otty Electrical insulating stitch bonded material
US4454192A (en) * 1981-11-16 1984-06-12 Sugawara Industrial Co. Pressure sensitive adhesive tape
US4769276A (en) * 1985-12-13 1988-09-06 Alsthom, S.A. Mica-coated electrically insulating and fire-proofing adhesive tape especially suitable for electrical or optical fiber cable
US4868035A (en) * 1988-05-16 1989-09-19 Weinberg Martin J Electrical insulating materials made partly or wholly of polyester film
US5118550A (en) * 1988-12-13 1992-06-02 Rhone Poulenc Fibres Substrate based on a nonwoven sheet made of chemical textile
US5181562A (en) * 1991-03-15 1993-01-26 Kabushiki Kaisha Toshiba Heat exchanger element and method of making the same
US5205037A (en) * 1991-03-15 1993-04-27 Kabushiki Kaisha Toshiba Method of making a heat exchange element
WO2008144800A1 (en) * 2007-05-25 2008-12-04 Jason Andrew Hopkins Manufacturing process for thermoelectric generator
US10199136B2 (en) * 2014-01-29 2019-02-05 Mitsubishi Electric Corporation Insulating tape and production method thereof, stator coil and production method thereof, and rotating electric machine
US10942070B2 (en) * 2018-05-21 2021-03-09 Haesung Ds Co., Ltd. Sensor unit, temperature sensor including the same, method of manufacturing the sensor unit, and method of manufacturing the temperature sensor
US11791684B2 (en) 2020-07-02 2023-10-17 Ge Aviation Systems Llc Method and system for electrically insulating portions of an electric machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588711A1 (fr) * 1985-10-11 1987-04-17 Cableco Sa Plaque pour foyer de cuisson a chauffage a induction et ustensile de cuisine utilisable avec un tel foyer
JPH07264787A (ja) * 1994-03-18 1995-10-13 Hitachi Ltd 複合薄膜絶縁体、及びその製造方法、並びにその複合薄膜絶縁体を用いた回転電機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019286A (en) * 1958-06-19 1962-01-30 Asea Ab Insulated electrical conductors and process for producing same
US3523061A (en) * 1969-06-20 1970-08-04 Minnesota Mining & Mfg Porous sheet materials of mica and unfused staple fibers
US3560320A (en) * 1967-10-05 1971-02-02 Gen Electric Insulating material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089026B (de) * 1958-06-19 1960-09-15 Asea Ab Isolierung fuer Hochspannungsleiter
JPS4323029B1 (enExample) * 1962-03-27 1968-10-03
CH416771A (de) * 1963-03-14 1966-07-15 Schweizerische Isolawerke Schmiegsames Wickelband
DE1241509B (de) * 1965-02-27 1967-06-01 Siemens Ag Elektrische Isolation
US3539438A (en) * 1967-06-12 1970-11-10 Minnesota Mining & Mfg Electrically insulative polymer impregnated,mica-paper tape

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019286A (en) * 1958-06-19 1962-01-30 Asea Ab Insulated electrical conductors and process for producing same
US3560320A (en) * 1967-10-05 1971-02-02 Gen Electric Insulating material
US3523061A (en) * 1969-06-20 1970-08-04 Minnesota Mining & Mfg Porous sheet materials of mica and unfused staple fibers

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091139A (en) * 1975-09-17 1978-05-23 Westinghouse Electric Corp. Semiconductor binding tape and an electrical member wrapped therewith
US4158078A (en) * 1977-06-10 1979-06-12 Huebner Bros. Of Canada Ltd. Heat strip or panel
US4265953A (en) * 1979-03-07 1981-05-05 Minnesota Mining And Manufacturing Company Intumescent stressed skin composite material
US4407876A (en) * 1979-08-08 1983-10-04 Malcolm Otty Electrical insulating stitch bonded material
US4286010A (en) * 1979-10-05 1981-08-25 Essex Group, Inc. Insulating mica paper and tapes thereof
US4381327A (en) * 1980-10-06 1983-04-26 Dennison Manufacturing Company Mica-foil laminations
US4307145A (en) * 1981-02-11 1981-12-22 Goldman Daniel S Decorative fabric and method of making the same
US4454192A (en) * 1981-11-16 1984-06-12 Sugawara Industrial Co. Pressure sensitive adhesive tape
US4769276A (en) * 1985-12-13 1988-09-06 Alsthom, S.A. Mica-coated electrically insulating and fire-proofing adhesive tape especially suitable for electrical or optical fiber cable
US4868035A (en) * 1988-05-16 1989-09-19 Weinberg Martin J Electrical insulating materials made partly or wholly of polyester film
US5118550A (en) * 1988-12-13 1992-06-02 Rhone Poulenc Fibres Substrate based on a nonwoven sheet made of chemical textile
US5181562A (en) * 1991-03-15 1993-01-26 Kabushiki Kaisha Toshiba Heat exchanger element and method of making the same
US5205037A (en) * 1991-03-15 1993-04-27 Kabushiki Kaisha Toshiba Method of making a heat exchange element
WO2008144800A1 (en) * 2007-05-25 2008-12-04 Jason Andrew Hopkins Manufacturing process for thermoelectric generator
US10199136B2 (en) * 2014-01-29 2019-02-05 Mitsubishi Electric Corporation Insulating tape and production method thereof, stator coil and production method thereof, and rotating electric machine
US10942070B2 (en) * 2018-05-21 2021-03-09 Haesung Ds Co., Ltd. Sensor unit, temperature sensor including the same, method of manufacturing the sensor unit, and method of manufacturing the temperature sensor
US11791684B2 (en) 2020-07-02 2023-10-17 Ge Aviation Systems Llc Method and system for electrically insulating portions of an electric machine

Also Published As

Publication number Publication date
DE2329532B2 (de) 1981-01-15
FR2188258A1 (enExample) 1974-01-18
FR2188258B1 (enExample) 1979-01-26
NL175563B (nl) 1984-06-18
NL7307943A (enExample) 1973-12-14
GB1426575A (en) 1976-03-03
DE2329532A1 (de) 1974-01-03
NL175563C (nl) 1984-11-16
CA988405A (en) 1976-05-04
CH558979A (de) 1975-02-14
SE412974B (sv) 1980-03-24
DE2329532C3 (de) 1982-10-07

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