EP0125747A2 - Fil conducteur électrique résistant à la chaleur - Google Patents
Fil conducteur électrique résistant à la chaleur Download PDFInfo
- Publication number
- EP0125747A2 EP0125747A2 EP84300886A EP84300886A EP0125747A2 EP 0125747 A2 EP0125747 A2 EP 0125747A2 EP 84300886 A EP84300886 A EP 84300886A EP 84300886 A EP84300886 A EP 84300886A EP 0125747 A2 EP0125747 A2 EP 0125747A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire
- nickel
- polyimide film
- conductive core
- layer
- 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.)
- Withdrawn
Links
- 229920001721 polyimide Polymers 0.000 claims abstract description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011152 fibreglass Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052736 halogen Inorganic materials 0.000 claims abstract description 5
- 150000002367 halogens Chemical class 0.000 claims abstract description 5
- 229910052709 silver Inorganic materials 0.000 claims abstract description 5
- 239000004332 silver Substances 0.000 claims abstract description 5
- 239000000779 smoke Substances 0.000 claims abstract description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 4
- 239000011135 tin Substances 0.000 claims abstract 4
- 229910052718 tin Inorganic materials 0.000 claims abstract 4
- 239000000203 mixture Substances 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims 2
- -1 polytetrafluoroethylene Polymers 0.000 claims 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 1
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 2
- 239000010425 asbestos Substances 0.000 description 6
- 229910052895 riebeckite Inorganic materials 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010411 cooking Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
Definitions
- the present invention relates generally to wires used to conduct an electrical current, and more particularly, to wires designed to withstand high continuous operating temperatures suitable for use in commercial and industrial heating systems as well as cooking equipment and appliances.
- Electrical wires of this type typically include a conductive core surrounded by an insulating covering or jacket.
- the primary insulating material is generally asbestos sheathed in an abrasion dampening braided fiberglass jacket.
- Asbestos has inherent disadvantages and limitations as an insulating material. Coarse asbestos insulation is relatively inflexible. Further, for a given maximum temperature application, asbestos increases the outer diameter of the wire making it difficult to work with such a wire.
- an embodiment of the present invention includes a conductive core which may be conventional materials, such as nickel or silver-plated, tin-plated or nickel-plated copper or iron.
- the conductive core is surrounded by a plurality of successive insulating layers of polyimide film.
- the first of such layers includes a strip of polyimide film helically wound with edges overlapping so as to completely envelope the conductive core.
- Each successive outer layer is formed by helically winding a stripe of polyimide film in the opposite direction in surrounding relationship to the underlying layer, also having its edges overlapped.
- a jacket of two layers of braided fiberglass encases the core and the insulating polyimide film layers.
- the fiberglass jacket may be impregnated with "Teflon" or silicone to create an increased abrasion dampening effect. Applicance wires so constructed will not smoke or support a flame. Further, wires incorporating silicone within the fiberglass sheath will not emit halogens even if heated to excessive temperatures.
- An embodiment of the present invention having two helically wound layers of polyimide film has an outside diameter approximately 30% less than comparable asbestos- insulated wire and can be bundled in much tighter packages for power, control and communications applications.
- the conducting wire of the present invention exhibits outstanding dielectric strength of 15 kilovolts with a wall thickness of 6 mils.
- the polyimide film provides a mechanical toughness to the wire.
- the film itself has a tensile strength of 25,000 pounds per square inch for one mil of film at room temperature with ultimate elongation of 70%.
- the thermal cut-through point for wire insulated with polyimide film is 525 ° C. as compared with ; 250 C. for most other high temperature insulators.
- the wire constructed in accordance with the present invention retains flexibility at cryogenic temperatures and readily dissipates heat from the conductive core. Such wires resist melting or dripping and also resist chemical ) alteration when contacted by most fuels, solvents, hydraulic fluids, cleaning agents and other chemical agents.
- Wires constructed in accordance with the present invention can be readily stripped with mechanical tools 5 ranging from manual to fully automatic and can be adapted for effective potting.
- the present invention will be described in detail as a electrical conducting wire suitable for use at a continuous operating temperature of 250° C. in applications including ovens, heater bands, motors and internal wiring of domestic, commercial and industrial heating and cooking equipment, with the understanding that the illustrated embodiment is to be considered an exemplification of the principles of the invention and is not intended to limit the invention.
- an electrical wire for conducting electric current is comprised of the following principal elements: a conductive core 20, a first or inner insulating layer 30, a second insulating layer 40 and a braided fiberglass jacket 50.
- the illustrated conductive core 20 is comprised of multiple strands 21; however, the core can also be of a solid configuration.
- conductor is copper or iron, either one being plated with nickel or silver.
- the first insulating layer 30 Surrounding the conductive core 20 is an inner insulating layer 30 having a composition including polyimide film.
- the first insulating layer 30 is formed from a thin strip or tape of polyimide film 31 helically wound in surrounding relationship to the conductive core 20. Adjacent edges of the helically wound tape overlap one another so that the core is completely encompassed.
- One embodiment of the present invention includes a plurality of successive insulating layers each layer having a composition of polyimide film.
- the multiple layers include a first layer 30 and at least one successive layer 40.
- the first layer 30 is helically wound, as previously described, in surrounding relationship to the conductive core 20.
- Each successive layer 40 is also formed from a thin strip of polyimide film or tape 41 helically wound in the opposite direction as the preceding layer 30 but at the same pitch and in surrounding relationship thereto--again with adjacent edges overlapped.
- One commercially available polyimide film is marketed under the trademark "Kapton" by E.I. du Pont de Nemours and Co. of Delaware.
- the insulating layers 30 and 40 of polyimide film are further encased in a braided jacket 50 of two layers having a composition including fiberglass.
- the braided fiberglass jacket 50 is comprised of individual strands 51 of corded fiberglass which includes a plurality of successive insulating layers braided to form a protective sheath.
- the braided fiberglass jacket is impregnated with "Teflon" or silicon for increased abrasion resistance.
- An electrical conducting wire so constructed will not smoke or support a flame when exposed to high temperatures such as 250° C. Further, an electric wire 11 incorporating silicone, as opposed to teflon, within the fiberglass jacket 50 will not emit halogens.
- the embodiment of the present invention illustrated utilizing two thin layers 30 and 40 of polyimide film helically wound in opposite directions, produces an electrical conducting wire 11 with improved moisture resistance and with greater dielectric strength; and yet, has an outside diameter approximately 30% smaller than comparable wires utilizing asbestos and provides greater flexibility even at cryogenic temperatures.
- the present invention provides for a safe electrical conducting wire capable of withstanding continuous operating temperatures of 250° C. which is yet resistant to moisture, chemicals, abrasion, impact, radiation, and has excellent dielectric strength. Further, embodiments of the present invention will not smoke, support a flame, or emit halogens when exposed to high temperatures.
- Wire 11, embodying the present invention is easier and safer to work with, to incorporate into electrical equipment, and to manufacture due to the size and flexibility of the wire 11.
- wires 11 embodying the present invention allow such wires to be more readily bundled in tighter packages for power control and communication applications.
- Wires 11 embodying the present invention can be stripped effectively with mechanical tools ranging from manual to fully automatic.
Landscapes
- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46750083A | 1983-02-18 | 1983-02-18 | |
| US467500 | 1983-02-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0125747A2 true EP0125747A2 (fr) | 1984-11-21 |
| EP0125747A3 EP0125747A3 (fr) | 1985-01-09 |
Family
ID=23855966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84300886A Withdrawn EP0125747A3 (fr) | 1983-02-18 | 1984-02-13 | Fil conducteur électrique résistant à la chaleur |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0125747A3 (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363064A1 (fr) * | 1988-10-03 | 1990-04-11 | AT&T Corp. | Système d'isolation pour conducteurs |
| EP0417656A2 (fr) * | 1989-09-13 | 1991-03-20 | TUBIGOMMA DEREGIBUS S.r.l. | Tube de caoutchouc pour l'isolation thermique des cables électriques |
| DE4323229A1 (de) * | 1993-07-12 | 1995-01-19 | Bayer Ag | Leiterkabel mit einer Silicon-imprägnierten Glasfaser-Ummantelung |
| EP1168375A1 (fr) * | 2000-02-04 | 2002-01-02 | Iwate Tokyo Wire Works, Ltd | Cable supraconducteur recouvert |
| CN109003713A (zh) * | 2018-07-20 | 2018-12-14 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | 一种防火光电综合缆及其实现方法 |
| CN119153166A (zh) * | 2024-11-14 | 2024-12-17 | 西安聚能超导线材科技有限公司 | 一种超导电缆以及超导电缆表面制备绝缘层的方法与应用 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3425865A (en) * | 1965-06-29 | 1969-02-04 | Cerro Corp | Insulated conductor |
| US3462544A (en) * | 1967-08-29 | 1969-08-19 | Us Navy | Electrical conductors with a heat resistant electrical insulation system |
| FR2095196A1 (fr) * | 1970-06-12 | 1972-02-11 | Du Pont | |
| FR2291585A1 (fr) * | 1974-11-18 | 1976-06-11 | Schweizerische Isolawerke | Cable electrique de liaison pour des vehicules de transport et des bateaux |
| US4051324A (en) * | 1975-05-12 | 1977-09-27 | Haveg Industries, Inc. | Radiation resistant cable and method of making same |
-
1984
- 1984-02-13 EP EP84300886A patent/EP0125747A3/fr not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3425865A (en) * | 1965-06-29 | 1969-02-04 | Cerro Corp | Insulated conductor |
| US3462544A (en) * | 1967-08-29 | 1969-08-19 | Us Navy | Electrical conductors with a heat resistant electrical insulation system |
| FR2095196A1 (fr) * | 1970-06-12 | 1972-02-11 | Du Pont | |
| FR2291585A1 (fr) * | 1974-11-18 | 1976-06-11 | Schweizerische Isolawerke | Cable electrique de liaison pour des vehicules de transport et des bateaux |
| US4051324A (en) * | 1975-05-12 | 1977-09-27 | Haveg Industries, Inc. | Radiation resistant cable and method of making same |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363064A1 (fr) * | 1988-10-03 | 1990-04-11 | AT&T Corp. | Système d'isolation pour conducteurs |
| EP0417656A2 (fr) * | 1989-09-13 | 1991-03-20 | TUBIGOMMA DEREGIBUS S.r.l. | Tube de caoutchouc pour l'isolation thermique des cables électriques |
| EP0417656A3 (en) * | 1989-09-13 | 1991-11-06 | Tubigomma Deregibus S.R.L. | Rubber tube for thermally insulating electric cables |
| DE4323229A1 (de) * | 1993-07-12 | 1995-01-19 | Bayer Ag | Leiterkabel mit einer Silicon-imprägnierten Glasfaser-Ummantelung |
| DE4323229C2 (de) * | 1993-07-12 | 1998-04-09 | Bayer Ag | Leiterkabel mit einer Silicon-imprägnierten Glasfaser-Ummantelung |
| EP1168375A1 (fr) * | 2000-02-04 | 2002-01-02 | Iwate Tokyo Wire Works, Ltd | Cable supraconducteur recouvert |
| EP1168375A4 (fr) * | 2000-02-04 | 2003-05-21 | Iwate Tokyo Wire Works Ltd | Cable supraconducteur recouvert |
| CN109003713A (zh) * | 2018-07-20 | 2018-12-14 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | 一种防火光电综合缆及其实现方法 |
| CN119153166A (zh) * | 2024-11-14 | 2024-12-17 | 西安聚能超导线材科技有限公司 | 一种超导电缆以及超导电缆表面制备绝缘层的方法与应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0125747A3 (fr) | 1985-01-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): BE DE FR GB SE |
|
| AK | Designated contracting states |
Designated state(s): BE DE FR GB SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19850910 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MOXLEY, RICHARD K. |