GB1387933A - Polyethylene covered conductors - Google Patents

Polyethylene covered conductors

Info

Publication number
GB1387933A
GB1387933A GB4808972A GB4808972A GB1387933A GB 1387933 A GB1387933 A GB 1387933A GB 4808972 A GB4808972 A GB 4808972A GB 4808972 A GB4808972 A GB 4808972A GB 1387933 A GB1387933 A GB 1387933A
Authority
GB
United Kingdom
Prior art keywords
conductor
polyethylene
cross
sheathing
specified
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
GB4808972A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1387933A publication Critical patent/GB1387933A/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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/05—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
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • 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
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Organic Insulating Materials (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)

Abstract

1387933 Conductor sheathing with crosslinked polyethylene SIEMENS AG 18 Oct 1972 [28 Jan 1972] 48089/72 Heading B5A [Also in Divisions C3 and H1] The insulation sheathing of an aluminium or copper conductor core 5, comprises extruded cross-linked polyethylene of a density and melt flow index respectively not greater than 0À935 gm./cc. and 0À3, and in which the cross-linking has been effected by a conventional peroxide agent during passage of the extrusion through a heated salt, liquid, or fluidized bed bath, which is at atmospheric pressure and in which the conductor is maintained at at least 80‹ C., e.g. 150‹ C., to suppress bubble formation at the core-sheathing interface. The sheathing may be applied directly to the metal conductor, which may be of non-circular sector section, or pretwisted section, or may be applied to a smoothing layer simultaneously applied to the conductor and comprising simultaneously cross-linkable semi-conducting ethylene/propylene copolymer. The sheathing is extruded from a head 1, the conductor 5 being pre-heated to 80 to 200‹ C., e.g. 100 to 170‹ C., during passage through the bore 8 of a heated copper member 6 provided with temperature regulating means 10, and an extension 7 of which member is surrounded, within the head 1, by thermal insulation 11. The conductor 5 may be additionally heated by high frequency means between the extruder and the bath, downstream of which cooling is effected by progressively lower temperature water. Prior to the preheating, the conductor may be solvent cleaned and coated with specified silanes promoting adhesion of the polyethylene sheath. Conventional peroxide cross-linking agents are specified, and these may be distributed on the polyethylene prior to, or during hot extrusion compounding, in specified volatilizable solvents. Cross-linking accelerators are specified. The polyethylene melt viscosity may be lowered by styrene butadiene rubber, silicone oils, and polyglycols, or by lubricants serving also as solvent for the peroxide, such as diphenylether and chlorinated biphenyl. The heating bath may comprise polyethylene glycol, or a eutectic salt mixture of potassium nitrate and sodium nitrite and nitrate. In the examples; solvent cleaned copper and aluminium conductors, coated with different silane adhesion promoters, are sheathed with 0À918 gm./cc., 0À2 melt index, polyethylene, cross-linked to specified percentages, (9) and a smoothing and a sheathing layer may be simultaneously extruded on to a multiple strand copper conductor, the smoothing layer comprising ethylene and vinylacrylate, or ethylene-vinylacetate polymer containing carbon black and dicumyl peroxide. The cross-linked polyethylene may contain styrene-butadiene polymer.
GB4808972A 1972-01-28 1972-10-18 Polyethylene covered conductors Expired GB1387933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2204655A DE2204655C3 (en) 1972-01-28 1972-01-28 Process for the production of electrical cables or lines with a sheath and / or insulation based on a crosslinked polyethylene

Publications (1)

Publication Number Publication Date
GB1387933A true GB1387933A (en) 1975-03-19

Family

ID=5834692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4808972A Expired GB1387933A (en) 1972-01-28 1972-10-18 Polyethylene covered conductors

Country Status (6)

Country Link
AT (1) AT316675B (en)
DE (1) DE2204655C3 (en)
FR (1) FR2169035B1 (en)
GB (1) GB1387933A (en)
IT (1) IT973124B (en)
TR (1) TR17458A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1361584A2 (en) * 2002-05-09 2003-11-12 CET Electric S.r.l. Apparatus particularly for manufacturing electrical cables with sheathing made of silicone rubber and the like
WO2007126343A1 (en) * 2006-04-27 2007-11-08 St. Jude Medical Ab Coated leads and method of preparing the same
CN101494106B (en) * 2009-02-20 2011-08-10 江苏中超电缆股份有限公司 Die-changing apparatus without shutdown for middle/high voltage crosslinking cable production line
CN101295565B (en) * 2007-03-19 2012-07-18 尼克桑斯公司 Method of manufacturing a cross-linked layer for a power and/or telecommunications cable, and the cable
CN103213290A (en) * 2013-04-25 2013-07-24 泰州华东绝缘材料有限公司 Hot oil type tubular heater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565887A1 (en) * 1984-06-14 1985-12-20 Ems Extrusion Continuous vulcanisation and/or crosslinking line, especially for producing insulating synthetic layers on cables
ITPD20050005A1 (en) * 2005-01-13 2006-07-14 Cet Eletric Srl IMPROVED EQUIPMENT FOR THE PRODUCTION OF ELECTRIC CABLES WITH SILICONE AND SIMILAR COATING

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1729710A1 (en) * 1967-08-18 1971-07-08 Kabel Metallwerke Ghh Device for pressure-free and non-contact vulcanization or cross-linking of strand or strip-shaped material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1361584A2 (en) * 2002-05-09 2003-11-12 CET Electric S.r.l. Apparatus particularly for manufacturing electrical cables with sheathing made of silicone rubber and the like
EP1361584A3 (en) * 2002-05-09 2004-01-14 CET Electric S.r.l. Apparatus particularly for manufacturing electrical cables with sheathing made of silicone rubber and the like
WO2007126343A1 (en) * 2006-04-27 2007-11-08 St. Jude Medical Ab Coated leads and method of preparing the same
CN101295565B (en) * 2007-03-19 2012-07-18 尼克桑斯公司 Method of manufacturing a cross-linked layer for a power and/or telecommunications cable, and the cable
CN101494106B (en) * 2009-02-20 2011-08-10 江苏中超电缆股份有限公司 Die-changing apparatus without shutdown for middle/high voltage crosslinking cable production line
CN103213290A (en) * 2013-04-25 2013-07-24 泰州华东绝缘材料有限公司 Hot oil type tubular heater
CN103213290B (en) * 2013-04-25 2015-04-08 泰州华东绝缘材料有限公司 Hot oil type tubular heater

Also Published As

Publication number Publication date
DE2204655C3 (en) 1982-03-04
DE2204655B2 (en) 1981-07-16
AT316675B (en) 1974-07-25
DE2204655A1 (en) 1973-08-02
FR2169035B1 (en) 1976-06-04
TR17458A (en) 1975-07-23
FR2169035A1 (en) 1973-09-07
IT973124B (en) 1974-06-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee