GB1475292A - Heat-recoverable articles and their use for splicing cables - Google Patents

Heat-recoverable articles and their use for splicing cables

Info

Publication number
GB1475292A
GB1475292A GB1480472A GB1480472A GB1475292A GB 1475292 A GB1475292 A GB 1475292A GB 1480472 A GB1480472 A GB 1480472A GB 1480472 A GB1480472 A GB 1480472A GB 1475292 A GB1475292 A GB 1475292A
Authority
GB
United Kingdom
Prior art keywords
sleeves
heat
specified values
resistance
inner
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
GB1480472A
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.)
Raychem Corp
Original Assignee
Raychem Corp
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
Priority to US12991971A priority Critical
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of GB1475292A publication Critical patent/GB1475292A/en
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00Cable fittings
    • H02G15/08Cable junctions
    • H02G15/18Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/1806Heat shrinkable sleeves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0616Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms layered or partially layered preforms, e.g. preforms with layers of adhesive or sealing compositions
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00Cable fittings
    • H02G15/003Filling materials, e.g. solid or fluid insulation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29KINDEXING 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
    • B29K2023/00Use of polyalkenes or derivatives thereof as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29KINDEXING 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
    • B29K2075/00Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

1475292 Cable joints RAYCHEM CORP 29 March 1972 [31 March 1971] 14804/72 Heading H2E In a cable joint of the kind in which polymeric inner sleeves 4 are heat-shrunk over individual conductor splices 14, and subsequently a larger polymeric outer sleeve 1 is heat-shrunk over the whole joint region, at least parts of the inner surfaces of the sleeves 1, 4 are provided with adhesive to seal the sleeves to the ends of cable sheaths 7 and conductor sheaths 8, 9, 10 respectively; moreover, each sleeve 1, 4 has a tensile strength of at least 1200 p.s.i., and a maximum stiffness of 10,000 p.s.i.; and sleeve 1 has a dielectric strength of at least 200 volts/ mil. while the sleeves 4 have a dielectric breakdown voltage of at least 6000 volts. Preferably, inner sleeves 4 exhibit specified values of flameretardancy and resistance to water, lubricating oils and non-inflammable hydraulic fluids, while outer sleeve 1 exhibits specified values of flammability, and resistance to water &c., and to heat. Further desiderata for both inner and outer sleeves are specified values of ultimate elongation, brittleness temperature, corrosive effect, volume resistivity, and water absorption. The material of the sleeves 1, 4 may be a cross-linked copolymer of ethylene-ethylacrylate or of ethylenevinyl acetate, and preferably contains a flame retardant; a suitable composition comprises 40 -50% (e.g. 45%) ethylene vinyl acetate; up to 10% (e.g. 7%) ethylene ethyl acrylate; 10- 20% (e.g. 15%) carbon black; up to 25% flame retardant, e.g. 18% halogenated bisimide; up to 10% (e.g. 6%) antimony oxide; remainder antioxidants and cross-linking agents, e.g. a peroxide. The adhesive may be a curable epoxy, but is preferably a hot melt adhesive, e.g. a low molecular weight polyamide posessing specified values of tensile yield strength, dielectric constant, dissipation factor, and volume resistivity. The heat to recover the sleeves may be produced by torch, hot air or catalytic heater, or the reaction of an exothermic material coated on to the sleeves; and a coating of thermochromic paint or other such material may indicate the degree of heat applied. Preferred characteristics of the completed joint include specified values of insulation resistance, flex life, bond strength, voltage withstand, and flame resistance. The Specification gives details of the tests used to determine the values of the characteristics specified, many by reference to the appropriate ASTM. The conductors splices 14 may be welded or mechanically formed, e.g. by beat rings or parallel or butt crimp connectors. The invention is of particular use in jointing cables in coal mines.
GB1480472A 1971-03-31 1972-03-29 Heat-recoverable articles and their use for splicing cables Expired GB1475292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12991971A true 1971-03-31 1971-03-31

Publications (1)

Publication Number Publication Date
GB1475292A true GB1475292A (en) 1977-06-01

Family

ID=22442208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1480472A Expired GB1475292A (en) 1971-03-31 1972-03-29 Heat-recoverable articles and their use for splicing cables

Country Status (10)

Country Link
BE (1) BE781546A (en)
BR (1) BR7201898D0 (en)
CA (1) CA1057373A (en)
DE (1) DE2215835A1 (en)
FR (1) FR2132338B1 (en)
GB (1) GB1475292A (en)
IL (1) IL39144D0 (en)
IT (1) IT950996B (en)
NL (1) NL7204265A (en)
ZA (1) ZA7202148B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1206004A1 (en) * 2000-11-07 2002-05-15 Robert Bosch Gmbh Process for manufacturing a re-usable cable junction and corresponding cable junction and its use
EP3200206A1 (en) * 2016-01-27 2017-08-02 ABB Schweiz AG Method for producing a wound conductor and wound conductor arrangement

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1545571A (en) * 1976-01-22 1979-05-10 Post Office Dimensionally heat-unstable products
GB1604612A (en) * 1976-10-29 1981-12-09 Raychem Ltd Epihalohydrin polymer compositions
US4415217A (en) * 1981-07-16 1983-11-15 Raychem Corporation Cable joining connector and method
ZA8501176B (en) * 1984-02-17 1986-10-29 Raychem Corp Joints between multiple-conductor cables
DE3533375C2 (en) * 1985-09-19 1987-06-19 Minnesota Mining And Manufacturing Co., Saint Paul, Minn., Us
DE3534620C2 (en) * 1985-09-28 1988-10-13 Continental Gummi-Werke Ag, 3000 Hannover, De
AU3572000A (en) * 1999-06-04 2000-12-28 Robert Stephen Roper Cable joints and terminations
CA2678090C (en) 2009-09-29 2011-05-10 The Procter & Gamble Company Absorbent products having improved packaging efficiency

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL130678C (en) * 1960-07-15 1900-01-01
BE635318A (en) * 1962-07-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1206004A1 (en) * 2000-11-07 2002-05-15 Robert Bosch Gmbh Process for manufacturing a re-usable cable junction and corresponding cable junction and its use
EP3200206A1 (en) * 2016-01-27 2017-08-02 ABB Schweiz AG Method for producing a wound conductor and wound conductor arrangement

Also Published As

Publication number Publication date
NL7204265A (en) 1972-10-03
FR2132338B1 (en) 1976-10-29
CA1057373A (en) 1979-06-26
BE781546A1 (en)
DE2215835A1 (en) 1972-10-12
IL39144D0 (en) 1972-06-28
FR2132338A1 (en) 1972-11-17
IT950996B (en) 1973-06-20
CA1057373A1 (en)
BE781546A (en) 1972-10-02
ZA7202148B (en) 1972-12-27
BR7201898D0 (en) 1973-06-07

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Legal Events

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