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 manufacture

Info

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
Application number
GB04081/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pirelli SpA filed Critical Pirelli SpA
Publication of GB1237173A publication Critical patent/GB1237173A/en
Expired legal-status Critical Current

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.
GB04081/69A 1968-03-26 1969-03-18 Electric cables insulated with rubber or synthetic material and a process for their manufacture Expired GB1237173A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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