EP0022415B1 - Câble électrique à isolant cellulaire, et procédé de préparation de celui-ci - Google Patents
Câble électrique à isolant cellulaire, et procédé de préparation de celui-ci Download PDFInfo
- Publication number
- EP0022415B1 EP0022415B1 EP19800401022 EP80401022A EP0022415B1 EP 0022415 B1 EP0022415 B1 EP 0022415B1 EP 19800401022 EP19800401022 EP 19800401022 EP 80401022 A EP80401022 A EP 80401022A EP 0022415 B1 EP0022415 B1 EP 0022415B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric cable
- cable according
- agent
- expanding agent
- insulation material
- 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
- 230000001413 cellular effect Effects 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 5
- 239000012774 insulation material Substances 0.000 title claims 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 12
- 239000004800 polyvinyl chloride Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000454 talc Substances 0.000 claims description 7
- 229910052623 talc Inorganic materials 0.000 claims description 7
- 239000002667 nucleating agent Substances 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical group NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000004156 Azodicarbonamide Substances 0.000 claims description 2
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 5
- 238000009413 insulation Methods 0.000 description 6
- 239000002666 chemical blowing agent Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000004604 Blowing Agent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/2855—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using foamed plastic
-
- 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
- H01B3/44—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 vinyl resins; acrylic resins
- H01B3/443—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 vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
-
- 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
- H01B7/02—Disposition of insulation
- H01B7/0233—Cables with a predominant gas dielectric
Definitions
- the present invention relates to an electrical cable for low or medium voltage, with cellular insulator constituted by polyvinyl chloride and at the same time forming a sheath.
- the object of the present invention is to provide an electrical cable with cellular insulation, made of polyvinyl chloride forming at the same time. sealing sheath which has a uniform thickness, an expansion of the insulation which is not excessive, a fine structure and a fairly smooth surface appearance, allowing its application in industrial manufacturing.
- the electric cable according to the invention is characterized in that its insulator is expanded up to a percentage by volume of closed pores of 20 to 40%, by the addition of very fine grains of a chemical blowing agent with a decomposition point between 180 ° and 200 ° C.
- the invention also relates to a process for manufacturing an electric cable as defined above, characterized in that it is passed through an extruder whose head temperature is maintained between 160 ° and 180 ° C, on the one hand by the punch an electrical conductor, on the other hand by the peripheral matrix of polyvinyl chloride added with very fine grains of a chemical blowing agent with a decomposition point between 180 ° and 200 ° C .
- a 0.9 mm diameter copper wire was used which was sheathed with plasticized polyvinyl chloride sold under the commercial designation "Benvic KI 80/100", added with a blowing agent formed from azodicarbonamide. , and in some cases talc playing the role of nucleating agent.
- the blowing agent was added to the polyvinyl chloride by kneading (with the addition of about 0.5% by weight of wetting agent).
- the polyvinyl chloride application head was for the delivery screw of the plastic material of a conventional type, used notably for polyethylene, with a filter formed by a 30/60/120/60 sieve, a punch with a diameter of 0.92 mm and a die with a diameter of 2.2 mm.
- the speed of the discharge screw was 68 revolutions / minute, and the pulling speed of 50 m / min. For some of the tests, the copper wire was preheated.
- the invention applies in particular to the insulation of cables and electrical conductors for low voltage.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Organic Insulating Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Molding Of Porous Articles (AREA)
- Insulated Conductors (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7917741A FR2461340A1 (fr) | 1979-07-09 | 1979-07-09 | Cable electrique a isolant cellulaire, et procede de preparation de celui-ci |
| FR7917741 | 1979-07-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0022415A1 EP0022415A1 (fr) | 1981-01-14 |
| EP0022415B1 true EP0022415B1 (fr) | 1983-12-14 |
Family
ID=9227667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19800401022 Expired EP0022415B1 (fr) | 1979-07-09 | 1980-07-04 | Câble électrique à isolant cellulaire, et procédé de préparation de celui-ci |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0022415B1 (enrdf_load_stackoverflow) |
| JP (1) | JPS56500789A (enrdf_load_stackoverflow) |
| DE (1) | DE3065880D1 (enrdf_load_stackoverflow) |
| FR (1) | FR2461340A1 (enrdf_load_stackoverflow) |
| WO (1) | WO1981000169A1 (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2609835B1 (fr) * | 1987-01-20 | 1992-03-13 | Nordlys | Materiau d'etancheite et son application a l'industrie du cable |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1036966B (de) * | 1956-12-15 | 1958-08-21 | Felten & Guilleaume Carlswerk | Elektrisches Kabel mit wasserdichtem gewelltem Metallmantel |
| BE660019A (enrdf_load_stackoverflow) * | 1964-02-22 | 1965-08-19 | ||
| DE1465678A1 (de) * | 1964-07-17 | 1969-05-22 | Kabel Metallwerke Ghh | Verfahren zum Herstellen von laengswasserdichten Kabeln |
| GB1277505A (en) * | 1969-11-19 | 1972-06-14 | British Insulated Callenders | Improvements in or relating to telecommunication cables |
| BE790023A (fr) * | 1971-10-14 | 1973-04-13 | Int Standard Electric Corp | Perfectionnements a la fabrication des cables telephoniques multiconducteurs |
| JPS4924577A (enrdf_load_stackoverflow) * | 1972-06-29 | 1974-03-05 | ||
| JPS4995193A (enrdf_load_stackoverflow) * | 1973-01-17 | 1974-09-10 | ||
| JPS5321428B2 (enrdf_load_stackoverflow) * | 1973-08-17 | 1978-07-03 | ||
| AU531473B2 (en) * | 1977-12-16 | 1983-08-25 | Sumitomo Electric Industries, Ltd. | Foamed plastic insulated wire |
-
1979
- 1979-07-09 FR FR7917741A patent/FR2461340A1/fr active Granted
-
1980
- 1980-07-04 EP EP19800401022 patent/EP0022415B1/fr not_active Expired
- 1980-07-04 DE DE8080401022T patent/DE3065880D1/de not_active Expired
- 1980-07-04 WO PCT/FR1980/000111 patent/WO1981000169A1/fr unknown
- 1980-07-04 JP JP50142580A patent/JPS56500789A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56500789A (enrdf_load_stackoverflow) | 1981-06-11 |
| WO1981000169A1 (fr) | 1981-01-22 |
| DE3065880D1 (en) | 1984-01-19 |
| FR2461340A1 (fr) | 1981-01-30 |
| FR2461340B1 (enrdf_load_stackoverflow) | 1982-09-03 |
| EP0022415A1 (fr) | 1981-01-14 |
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