WO1981000169A1 - Cable electrique a isolant cellulaire, et procede de preparation de celui-ci - Google Patents
Cable electrique a isolant cellulaire, et procede de preparation de celui-ci Download PDFInfo
- Publication number
- WO1981000169A1 WO1981000169A1 PCT/FR1980/000111 FR8000111W WO8100169A1 WO 1981000169 A1 WO1981000169 A1 WO 1981000169A1 FR 8000111 W FR8000111 W FR 8000111W WO 8100169 A1 WO8100169 A1 WO 8100169A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable according
- agent
- polyvinyl chloride
- electric cable
- fine grains
- Prior art date
Links
- 230000001413 cellular effect Effects 0.000 title claims abstract description 9
- 239000011810 insulating material Substances 0.000 title abstract 3
- 238000002360 preparation method Methods 0.000 title description 3
- 238000000034 method Methods 0.000 title description 2
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 14
- 239000004800 polyvinyl chloride Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 5
- 239000002667 nucleating agent Substances 0.000 claims description 5
- 239000000454 talc Substances 0.000 claims description 5
- 229910052623 talc Inorganic materials 0.000 claims description 5
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical group NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 4
- 239000002666 chemical blowing agent Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004156 Azodicarbonamide Substances 0.000 claims description 3
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- -1 vinyl poly-chloride Chemical compound 0.000 abstract description 4
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920000573 polyethylene Polymers 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
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 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
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction 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 insulation forming at the same time a sheath.
- Polyethylene cellular insulating electrical cables are already known. This, however, is a relatively high density material and quite expensive. Solid insulation cables made of compact polyvinyl chloride, a less dense and less expensive material than polyethylene, have already been used. But until now we had not succeeded in obtaining cellular polyvinyl chloride insulators, because it must be added with plasticizers and fillers to allow its use in cables, and the tests carried out so far on coating of conductors by cellular polyvinyl chloride gave only cables of very irregular thickness, unsatisfactory for industrial use.
- the present invention aims to provide an electrical cable with cellular insulation, forming at the same time, sealing sheath, of polyvinyl chloride, 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 consists of expanded polyvinyl chloride up to a percentage of closed pores of about 20 to 40%, by the addition of very fine grains of an agent chemical expansion of decomposition point between 180 ° and 200 ° C approximately.
- the chemical blowing agent is azodicarbonamide.
- the chemical blowing agent is in grains of average size about 10 microns.
- the chemical blowing agent is in proportion by weight from 0.05 to 0.5% by weight.
- Polyvinyl chloride is also added with a nucleating agent.
- the nucleating agent is talc in fine grains.
- - Talc in fine grains is in proportion of about 0.5% by weight.
- the invention also relates to a method of 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 expanding agent with a decomposition point of about 180 ° to 200 ° C.
- the polyvinylchloride application head was for the delivery screw of the plastic material of a conventional type, used in particular for polyethylene, with a filter formed by a 30/60/120/60 screen, a punch of 0.92 mm diameter and a 2.2 mm diameter die.
- the speed of the discharge screw was 68 revolutions / minute, and the pulling speed of 50 m / min.
- 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 (1)
| Publication Number | Publication Date |
|---|---|
| WO1981000169A1 true WO1981000169A1 (fr) | 1981-01-22 |
Family
ID=9227667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1980/000111 WO1981000169A1 (fr) | 1979-07-09 | 1980-07-04 | Cable electrique a isolant cellulaire, et procede de preparation 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 |
Citations (4)
| 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 |
| BE666019A (enrdf_load_stackoverflow) * | 1964-07-17 | 1965-10-18 | ||
| DE2056520A1 (de) * | 1969-11-19 | 1971-05-27 | British Insulated Callenders | Fernmeldekabel |
| DE2853626A1 (de) * | 1977-12-16 | 1979-06-28 | Sumitomo Electric Industries | Mit einem geschaeumten kunststoff isolierter draht und verfahren zu seiner herstellung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE660019A (enrdf_load_stackoverflow) * | 1964-02-22 | 1965-08-19 | ||
| 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 |
-
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
Patent Citations (4)
| 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 |
| BE666019A (enrdf_load_stackoverflow) * | 1964-07-17 | 1965-10-18 | ||
| DE2056520A1 (de) * | 1969-11-19 | 1971-05-27 | British Insulated Callenders | Fernmeldekabel |
| DE2853626A1 (de) * | 1977-12-16 | 1979-06-28 | Sumitomo Electric Industries | Mit einem geschaeumten kunststoff isolierter draht und verfahren zu seiner herstellung |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56500789A (enrdf_load_stackoverflow) | 1981-06-11 |
| EP0022415B1 (fr) | 1983-12-14 |
| 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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| AK | Designated states |
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