GB1237173A - Electric cables insulated with rubber or synthetic material and a process for their manufacture - Google Patents
Electric cables insulated with rubber or synthetic material and a process for their manufactureInfo
- Publication number
- GB1237173A GB1237173A GB04081/69A GB1408169A GB1237173A GB 1237173 A GB1237173 A GB 1237173A GB 04081/69 A GB04081/69 A GB 04081/69A GB 1408169 A GB1408169 A GB 1408169A GB 1237173 A GB1237173 A GB 1237173A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layers
- polyethylene
- core
- cross
- cores
- 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
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
-
- 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
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
-
- 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
- H01B3/441—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 alkenes
-
- 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
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/20—Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3462—Cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1,237,173. Cable insulation. PIRELLI S.p.A. 18 March 1969 [26 March, 1968; 23 Dec., 1968], No. 14081/69. Heading H1A. A process for forming an insulating covering around a cable core or a plurality of cores comprises the steps of successively extruding at least three layers of insulating material around said cores, each layer being not more than 2 millimeters thick. The number of layers may be between five and one hundred, and each layer may not be less than 0À2 millimeters thick. The layers may all be of same thickness or the innermost layers may be thinner than the outermost. The layers may be extruded at positions spaced apart by not less than 30 millimeters. The layers may be extruded through an extrusion head having a plurality of annular extrusion nozzles disposed in series or sequentially through a plurality of extrusion heads disposed in series. The layers may all be of the same material or alternate layers may be composed of one of two materials. The two materials may be low and high density polyethylene; low meltindex and high melt-index polyethylene; polyethylene and propylene; cross-linked ethylene propylene and cross-linked polyethylene; EPD terpolymer and ethylene-propylene; EPD terpolymer and cross-linked polyethylene. The insulation could be applied to a single core or each core or bundle of cores of a multi-core cable and then covered by an outer layer of copper wires and a polyethylene sheath.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1438268 | 1968-03-26 | ||
IT2551068 | 1968-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1237173A true GB1237173A (en) | 1971-06-30 |
Family
ID=26326719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB04081/69A Expired GB1237173A (en) | 1968-03-26 | 1969-03-18 | Electric cables insulated with rubber or synthetic material and a process for their manufacture |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH501984A (en) |
DE (1) | DE1914478A1 (en) |
FR (1) | FR2004717A1 (en) |
GB (1) | GB1237173A (en) |
NL (1) | NL6903660A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2341924A1 (en) * | 1976-02-20 | 1977-09-16 | Gen Cable Corp | CAMPAIGN TELEPHONE WIRE AND ITS PRODUCTION PROCESS |
FR2475280A1 (en) * | 1980-01-31 | 1981-08-07 | Sumitomo Electric Industries | HIGH PERFECTION IGNITION CABLE |
US4997995A (en) * | 1988-10-17 | 1991-03-05 | Pirelli General Plc | Extra-high-voltage power cable |
EP0583521A1 (en) * | 1992-08-12 | 1994-02-23 | Totoku Electric Co., Ltd. | Multi-layered insulated wire for high frequency transformer winding |
EP0673044A3 (en) * | 1992-08-19 | 1995-10-18 | Totoku Electric | |
WO2002059909A1 (en) * | 2001-01-25 | 2002-08-01 | Nkt Cables A/S | An insulation system, in particular for electric power cables |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1362179A (en) * | 1970-11-25 | 1974-07-30 | British Insulated Callenders | Electric cables |
NO179499C (en) * | 1994-04-13 | 1996-10-16 | Alcatel Kabel Norge As | Extruder plant, cable and method |
DE19908110A1 (en) * | 1999-02-25 | 2000-08-31 | Alcatel Sa | Element with extruded cover |
-
1969
- 1969-03-10 NL NL6903660A patent/NL6903660A/xx unknown
- 1969-03-17 FR FR6907526A patent/FR2004717A1/fr not_active Withdrawn
- 1969-03-18 GB GB04081/69A patent/GB1237173A/en not_active Expired
- 1969-03-18 CH CH402569A patent/CH501984A/en not_active IP Right Cessation
- 1969-03-21 DE DE19691914478 patent/DE1914478A1/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2341924A1 (en) * | 1976-02-20 | 1977-09-16 | Gen Cable Corp | CAMPAIGN TELEPHONE WIRE AND ITS PRODUCTION PROCESS |
FR2475280A1 (en) * | 1980-01-31 | 1981-08-07 | Sumitomo Electric Industries | HIGH PERFECTION IGNITION CABLE |
US4997995A (en) * | 1988-10-17 | 1991-03-05 | Pirelli General Plc | Extra-high-voltage power cable |
EP0583521A1 (en) * | 1992-08-12 | 1994-02-23 | Totoku Electric Co., Ltd. | Multi-layered insulated wire for high frequency transformer winding |
EP0673044A3 (en) * | 1992-08-19 | 1995-10-18 | Totoku Electric | |
WO2002059909A1 (en) * | 2001-01-25 | 2002-08-01 | Nkt Cables A/S | An insulation system, in particular for electric power cables |
Also Published As
Publication number | Publication date |
---|---|
CH501984A (en) | 1971-01-15 |
FR2004717A1 (en) | 1969-11-28 |
NL6903660A (en) | 1969-09-30 |
DE1914478A1 (en) | 1970-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |