CA1136817A - Method for producing insulated winding wire by extruding thermoplasts - Google Patents
Method for producing insulated winding wire by extruding thermoplastsInfo
- Publication number
- CA1136817A CA1136817A CA000360090A CA360090A CA1136817A CA 1136817 A CA1136817 A CA 1136817A CA 000360090 A CA000360090 A CA 000360090A CA 360090 A CA360090 A CA 360090A CA 1136817 A CA1136817 A CA 1136817A
- Authority
- CA
- Canada
- Prior art keywords
- wire
- enamel
- winding wire
- polyether ketone
- melting point
- 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
Links
- 238000004804 winding Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title 1
- 229920001643 poly(ether ketone) Polymers 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 125000003118 aryl group Chemical group 0.000 claims abstract description 8
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 8
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 210000003298 dental enamel Anatomy 0.000 claims description 5
- -1 aromatic radi-cal Chemical class 0.000 claims description 4
- 125000004957 naphthylene group Chemical group 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- IFVTZJHWGZSXFD-UHFFFAOYSA-N biphenylene Chemical group C1=CC=C2C3=CC=CC=C3C2=C1 IFVTZJHWGZSXFD-UHFFFAOYSA-N 0.000 claims description 3
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- MGNZXYYWBUKAII-UHFFFAOYSA-N cyclohexa-1,3-diene Chemical compound C1CC=CC=C1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H01B3/18—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
- H01B3/427—Polyethers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
-
- 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
- H01B3/308—Wires with resins
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Insulating Materials (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Adornments (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Insulated Conductors (AREA)
Abstract
Abstract An improved method of producing enamel-insulated winding wire is disclosed which comprises extruding around a conductor wire a coating of a partly crystalline thermoplastic having a crystallite melting point above 170°C and comprising an aromatic polyether ketone of the formula:
Description
113~8~7 The present invention relates to an improved method of producing insulated winding wire by extruding a thermoplast onto the wire.
Enamel -insulated winding wire, known as "enamelled wire", is defined in German Industrial Standard 46 ~35 of April 1977 and is widely used in electrical engineering, transformer construction, and electronics.
The conductor, preferably made of copper or aluminum, is insulated with a layer of synthetic resin which is thin but is extremely resistant to mechanical stress and heat.
Enamelled wire of this kind is produced, on wire-enamelling machines by continuous multiple application of a wire-enamel to the metal wire. In view of the harmful properties of the solvents con-tained in the enamel, and the resulting pollution problems, wire-enamel dispersions, aqueous solutions of wire-enamel resins, and melted resins are also being used for wire-enamelling.
~lowever, because of the relatively low take-off speeds attainable, all of these known methods are labour-intensive and time-consuming.
It has been knowr. for some time, from the cable industry, to extrude thermoplasts for the purpose of providing thick sheathing for bundles of electrical conductors for producing line-wires or cables.
A method of producing enamel-insulated winding wire by extruding thermoplasts has already been described in German OLS 2638763.
This earlier application, produced with the Applicant's co-operation, was an important factor in demonstrating the possibility of obtaining by extrusion layers of insulation, thin enough to meet German , ~
. , .
.:
-:
:
Industrial Standard 46 435. According to German OLS 2638763, the thermoplasts used for the extrusion-coating of winding wire are thermo-plastic polycondensates having crystallite melting points of above 170 C, preferably above 250 C.
In addition to various linear polyesters and polyamides, the prior application mentions polymers with chain-located sulphur atoms, e.g. polyphenyl sulphide. The examples describe extrusion conditions for polyethylene terephthalate, 6,6-polyamide, and polyphenylene sulphide, and the properties of the enamelled wires thus obtained.
All winding wires coated with these thermoplasts have the disadvantage of softening temperatures (according to German Industrial Standard 46 453) far below 300 C, i.e. they do not meet the increased requirements. Heat-shock values are also partly unsatisfactory, and the surface hardness of the enamelled wire is too low for modern motor-winding techniques.
It has now been found, quite unexpectedly, that substantial improvements may be obtained using special, partly crystalline thermo-plastic polycondensates having crystallite melting points above 170 and preferably 250~C.
Accordingly, the invention provides a method of producing an enamel-insulated winding wire which comprises extruding around a core wire a coating of a partly crystalline thermoplastic polycondensate having a crystallite melting point above 170~C and comprising an aroma-tic polyether ketone of the formula:
~O-Ar-O-Ar-C-Ar3n wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
113~iB17 Another aspect of the invention provides an enamel-insulating winding wire comprising a core wire having a surround of a partly crystalline thermoplastic polycondensate having a crystallite melting point above 170C and comprising an aromatic polyether ketone of the formula:
f O-Ar-O-Ar-C-Ar~
wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
The partly crystalline thermoplastic polycondensate preferably has a crystallite melting point above 250~C. Preferred ketones are those of formula I in which each Ar represents a phenylene, naphthylene or diphenylene radical.
It was completely surprising that winding wire coated with aromatic polyether ketones, e.e. thermoplasts, could have a softening temperature far above 300C and a surface hardness of from 2 to 3 H, otherwise obtainable only with winding wire with thermosetting coatings.
Furthermore, as compared with the values obtained with con-ventional thermoplasts, the heat-shock value of winding wire insulated with polyether ketone coatings is, surprisingly greatly improved.
The following Example illustrates the invention.
Example:
E4~o~co~ ~
n = ca.100 The coating material was partly crystalline aromatic polyether ketone of the formula:
Crystallite melting point 335 C.
113f~17 Proce sing conditions.
Extruder temperatures from inlet to nozzle:
390C/410~C/ 420C/ 420~C/ 420~C/440C.
Take-off speed: 200m/min.
Layer thickness: 50 - 60 ~u ~increase in diameter) (0.6 mm bare copper wire) Properties of the winding wire:
Hardness: 2H - 3H
Residual hardness after the action of (30 min/60 C in each case):
ethanol 2H
benzene H
water 2H
Softening temperature: 340 - 350 C
Resistance to tearing: satisfactory Adhesion: winding about its own diameter after 25%
preliminary stretching:
satisfactory Heat shock: at 300 C satisfactory.
~after winding about its own diameter) Satisfactory results were also obtainable by substituting other aromatic polyether ketones of Formula I in which the groups Ar represent naphthylene or diphenylene.
.
Enamel -insulated winding wire, known as "enamelled wire", is defined in German Industrial Standard 46 ~35 of April 1977 and is widely used in electrical engineering, transformer construction, and electronics.
The conductor, preferably made of copper or aluminum, is insulated with a layer of synthetic resin which is thin but is extremely resistant to mechanical stress and heat.
Enamelled wire of this kind is produced, on wire-enamelling machines by continuous multiple application of a wire-enamel to the metal wire. In view of the harmful properties of the solvents con-tained in the enamel, and the resulting pollution problems, wire-enamel dispersions, aqueous solutions of wire-enamel resins, and melted resins are also being used for wire-enamelling.
~lowever, because of the relatively low take-off speeds attainable, all of these known methods are labour-intensive and time-consuming.
It has been knowr. for some time, from the cable industry, to extrude thermoplasts for the purpose of providing thick sheathing for bundles of electrical conductors for producing line-wires or cables.
A method of producing enamel-insulated winding wire by extruding thermoplasts has already been described in German OLS 2638763.
This earlier application, produced with the Applicant's co-operation, was an important factor in demonstrating the possibility of obtaining by extrusion layers of insulation, thin enough to meet German , ~
. , .
.:
-:
:
Industrial Standard 46 435. According to German OLS 2638763, the thermoplasts used for the extrusion-coating of winding wire are thermo-plastic polycondensates having crystallite melting points of above 170 C, preferably above 250 C.
In addition to various linear polyesters and polyamides, the prior application mentions polymers with chain-located sulphur atoms, e.g. polyphenyl sulphide. The examples describe extrusion conditions for polyethylene terephthalate, 6,6-polyamide, and polyphenylene sulphide, and the properties of the enamelled wires thus obtained.
All winding wires coated with these thermoplasts have the disadvantage of softening temperatures (according to German Industrial Standard 46 453) far below 300 C, i.e. they do not meet the increased requirements. Heat-shock values are also partly unsatisfactory, and the surface hardness of the enamelled wire is too low for modern motor-winding techniques.
It has now been found, quite unexpectedly, that substantial improvements may be obtained using special, partly crystalline thermo-plastic polycondensates having crystallite melting points above 170 and preferably 250~C.
Accordingly, the invention provides a method of producing an enamel-insulated winding wire which comprises extruding around a core wire a coating of a partly crystalline thermoplastic polycondensate having a crystallite melting point above 170~C and comprising an aroma-tic polyether ketone of the formula:
~O-Ar-O-Ar-C-Ar3n wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
113~iB17 Another aspect of the invention provides an enamel-insulating winding wire comprising a core wire having a surround of a partly crystalline thermoplastic polycondensate having a crystallite melting point above 170C and comprising an aromatic polyether ketone of the formula:
f O-Ar-O-Ar-C-Ar~
wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
The partly crystalline thermoplastic polycondensate preferably has a crystallite melting point above 250~C. Preferred ketones are those of formula I in which each Ar represents a phenylene, naphthylene or diphenylene radical.
It was completely surprising that winding wire coated with aromatic polyether ketones, e.e. thermoplasts, could have a softening temperature far above 300C and a surface hardness of from 2 to 3 H, otherwise obtainable only with winding wire with thermosetting coatings.
Furthermore, as compared with the values obtained with con-ventional thermoplasts, the heat-shock value of winding wire insulated with polyether ketone coatings is, surprisingly greatly improved.
The following Example illustrates the invention.
Example:
E4~o~co~ ~
n = ca.100 The coating material was partly crystalline aromatic polyether ketone of the formula:
Crystallite melting point 335 C.
113f~17 Proce sing conditions.
Extruder temperatures from inlet to nozzle:
390C/410~C/ 420C/ 420~C/ 420~C/440C.
Take-off speed: 200m/min.
Layer thickness: 50 - 60 ~u ~increase in diameter) (0.6 mm bare copper wire) Properties of the winding wire:
Hardness: 2H - 3H
Residual hardness after the action of (30 min/60 C in each case):
ethanol 2H
benzene H
water 2H
Softening temperature: 340 - 350 C
Resistance to tearing: satisfactory Adhesion: winding about its own diameter after 25%
preliminary stretching:
satisfactory Heat shock: at 300 C satisfactory.
~after winding about its own diameter) Satisfactory results were also obtainable by substituting other aromatic polyether ketones of Formula I in which the groups Ar represent naphthylene or diphenylene.
.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of producing an enamel-insulated winding wire which comprises extruding around a core wire a coating of a partly crystalline thermoplastic polycondensate having a crystallite melting point above 170°C
and comprising an aromatic polyether ketone of the formula wherein each Ar may be the same or different and represents an aromatic radi-cal and n signifies a whole number between 50 and 200.
and comprising an aromatic polyether ketone of the formula wherein each Ar may be the same or different and represents an aromatic radi-cal and n signifies a whole number between 50 and 200.
2. A method according to claim 1 wherein the crystallite melting point of the polyether ketone is above 250°C.
3. A method according to claim 1 or 2, wherein each Ar represents phenylene, naphthylene or diphenylene.
4. An enamel-insulating winding wire comprising a core wire having a surround of a partly crystalline thermoplastic polycondensate having a crystallite metting point above 170°C and comprising an aromatic polyether ketone of the formula:
wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
wherein each Ar may be the same or different and represents an aromatic radical and n signifies a whole number between 50 and 200.
5. An enamel wire according to claim 4, wherein the polyether ketone has a crystallite melting point above 250°C.
6. An enamel wire according to claim 4 or 5, wherein each Ar represents phenylene, naphthylene or diphenylene.
7. An enamel wire according to claim 4 or 5, wherein the core wire is formed of copper or aluminum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2936795.1 | 1979-09-12 | ||
| DE2936795A DE2936795C2 (en) | 1979-09-12 | 1979-09-12 | Process for the production of insulated winding wires by extrusion of thermoplastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1136817A true CA1136817A (en) | 1982-12-07 |
Family
ID=6080629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000360090A Expired CA1136817A (en) | 1979-09-12 | 1980-09-11 | Method for producing insulated winding wire by extruding thermoplasts |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0025538B1 (en) |
| JP (1) | JPS5673818A (en) |
| AT (1) | ATE7975T1 (en) |
| AU (1) | AU6144180A (en) |
| CA (1) | CA1136817A (en) |
| DE (2) | DE2936795C2 (en) |
| DK (1) | DK386380A (en) |
| ES (1) | ES494986A0 (en) |
| FI (1) | FI802708A7 (en) |
| IN (1) | IN154846B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837618U (en) * | 1981-09-08 | 1983-03-11 | 三菱電線工業株式会社 | insulated wire |
| DE3145918A1 (en) * | 1981-11-19 | 1983-05-26 | Dr. Beck & Co Ag, 2000 Hamburg | METHOD FOR IMPREGNATING STRAPPED WIRE WITH STRAND BY EXTRUSION OF THERMOPLASTICS. |
| JPS59207233A (en) * | 1983-05-11 | 1984-11-24 | 住友化学工業株式会社 | Coating method |
| JPS62148234A (en) * | 1985-12-23 | 1987-07-02 | Sumitomo Bakelite Co Ltd | Manufacture of electric wire insulated with thermoplastic aromatic polyether ketone |
| DE19748529A1 (en) * | 1997-11-03 | 1999-03-04 | Siemens Ag | Insulation of electric wound coils of electric machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503818A (en) * | 1966-12-01 | 1970-03-31 | Union Carbide Corp | Polyarylene polyether insulated conductors and process for making same |
| US4239884A (en) * | 1975-08-11 | 1980-12-16 | Raychem Corporation | Process for isolation of solid polymers |
| CH616264A5 (en) * | 1976-07-01 | 1980-03-14 | Maillefer Sa |
-
1979
- 1979-09-12 DE DE2936795A patent/DE2936795C2/en not_active Expired
-
1980
- 1980-08-14 AU AU61441/80A patent/AU6144180A/en not_active Abandoned
- 1980-08-27 JP JP11713880A patent/JPS5673818A/en active Pending
- 1980-08-27 FI FI802708A patent/FI802708A7/en not_active Application Discontinuation
- 1980-08-29 DE DE8080105156T patent/DE3068209D1/en not_active Expired
- 1980-08-29 AT AT80105156T patent/ATE7975T1/en not_active IP Right Cessation
- 1980-08-29 EP EP80105156A patent/EP0025538B1/en not_active Expired
- 1980-09-03 IN IN640/DEL/80A patent/IN154846B/en unknown
- 1980-09-11 CA CA000360090A patent/CA1136817A/en not_active Expired
- 1980-09-11 DK DK386380A patent/DK386380A/en not_active Application Discontinuation
- 1980-09-12 ES ES494986A patent/ES494986A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| EP0025538B1 (en) | 1984-06-13 |
| ATE7975T1 (en) | 1984-06-15 |
| IN154846B (en) | 1984-12-15 |
| ES8106630A1 (en) | 1981-08-01 |
| DE2936795A1 (en) | 1981-04-02 |
| ES494986A0 (en) | 1981-08-01 |
| DE3068209D1 (en) | 1984-07-19 |
| FI802708A7 (en) | 1981-01-01 |
| AU6144180A (en) | 1981-03-19 |
| DE2936795C2 (en) | 1982-12-09 |
| JPS5673818A (en) | 1981-06-18 |
| EP0025538A3 (en) | 1981-10-07 |
| EP0025538A2 (en) | 1981-03-25 |
| DK386380A (en) | 1981-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |