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GB2011154A - Telecommunication cables - Google Patents

Telecommunication cables

Info

Publication number
GB2011154A
GB2011154A GB7843072A GB7843072A GB2011154A GB 2011154 A GB2011154 A GB 2011154A GB 7843072 A GB7843072 A GB 7843072A GB 7843072 A GB7843072 A GB 7843072A GB 2011154 A GB2011154 A GB 2011154A
Authority
GB
United Kingdom
Prior art keywords
sheath
polyethylene
core
buffer material
envelope
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.)
Granted
Application number
GB7843072A
Other versions
GB2011154B (en
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Priority to GB7843072A priority Critical patent/GB2011154B/en
Publication of GB2011154A publication Critical patent/GB2011154A/en
Application granted granted Critical
Publication of GB2011154B publication Critical patent/GB2011154B/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
    • H01B7/17—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
    • 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
    • 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
    • H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)

Abstract

In a telecommunication cable comprising a core 1 including a multiplicity of polyethylene insulated conductors 2 with petroleum jelly 3 filling the interstices between the conductors, and, a polyethylene sheath 7, risk that a space between the core and sheath will provide a path for water that has entered the cable through a defective sheath is reduced by positioning between the core and sheath a flexible envelope 4 of polyethylene or polyethylene terephthalate containing a buffer material 5, or two or more such envelopes arranged side by side and/or end to end. The buffer material flows or is deformed within the envelope when the sheath is applied or it expands after the sheath is applied or, being hygroscopic e.g. polyacrylamide, when water penetrates the envelope. 6 is an optional polyethylene coated aluminium moisture barrier. The buffer material may be air, petroleum jelly, free- flowing particles or foam. <IMAGE>
GB7843072A 1977-11-03 1978-11-03 Telecommunication cables Expired GB2011154B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7843072A GB2011154B (en) 1977-11-03 1978-11-03 Telecommunication cables

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4574077 1977-11-03
GB7843072A GB2011154B (en) 1977-11-03 1978-11-03 Telecommunication cables

Publications (2)

Publication Number Publication Date
GB2011154A true GB2011154A (en) 1979-07-04
GB2011154B GB2011154B (en) 1982-06-16

Family

ID=26265653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7843072A Expired GB2011154B (en) 1977-11-03 1978-11-03 Telecommunication cables

Country Status (1)

Country Link
GB (1) GB2011154B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037611A1 (en) * 1980-04-07 1981-10-14 Witco Chemical Corporation Foamed cable filler and cable containing such filler
EP0271171A1 (en) * 1986-12-11 1988-06-15 Lantor B.V. Expandable tape for cables, the use thereof, and cables
FR2609835A1 (en) * 1987-01-20 1988-07-22 Nordlys SEALING MATERIAL AND ITS APPLICATION TO THE CABLE INDUSTRY
AU656486B2 (en) * 1992-10-27 1995-02-02 American Telephone And Telegraph Company Undersea armored cable
GB2418524A (en) * 2004-08-26 2006-03-29 Daniel Gable Multi stranded conductor core with a dual insulation system.
CN113096870A (en) * 2021-04-12 2021-07-09 安徽金环电气设备有限责任公司 Magnetic control gas pushing type anti-bending cable

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037611A1 (en) * 1980-04-07 1981-10-14 Witco Chemical Corporation Foamed cable filler and cable containing such filler
EP0271171A1 (en) * 1986-12-11 1988-06-15 Lantor B.V. Expandable tape for cables, the use thereof, and cables
US5089329A (en) * 1986-12-11 1992-02-18 Union Industrial Y. A. Expandable tape for cables, the use thereof, and cables
FR2609835A1 (en) * 1987-01-20 1988-07-22 Nordlys SEALING MATERIAL AND ITS APPLICATION TO THE CABLE INDUSTRY
EP0279718A1 (en) * 1987-01-20 1988-08-24 NORDLYS, Société Anonyme dite: Water-tight material and its use in the cable industry
AU656486B2 (en) * 1992-10-27 1995-02-02 American Telephone And Telegraph Company Undersea armored cable
GB2418524A (en) * 2004-08-26 2006-03-29 Daniel Gable Multi stranded conductor core with a dual insulation system.
CN113096870A (en) * 2021-04-12 2021-07-09 安徽金环电气设备有限责任公司 Magnetic control gas pushing type anti-bending cable
CN113096870B (en) * 2021-04-12 2022-10-14 云南前列电缆有限公司 Magnetic control gas pushing type anti-bending cable

Also Published As

Publication number Publication date
GB2011154B (en) 1982-06-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee