US3735025A - Semiconducting composition and cable jacketed therewith - Google Patents
Semiconducting composition and cable jacketed therewith Download PDFInfo
- Publication number
- US3735025A US3735025A US00167741A US3735025DA US3735025A US 3735025 A US3735025 A US 3735025A US 00167741 A US00167741 A US 00167741A US 3735025D A US3735025D A US 3735025DA US 3735025 A US3735025 A US 3735025A
- Authority
- US
- United States
- Prior art keywords
- cable
- insulation
- semiconducting
- composition
- jacket
- 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 - Lifetime
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Classifications
-
- 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
- H01B3/002—Inhomogeneous material in general
- H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/027—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layers
Definitions
- ABSTRACT Electrical cables are jacketed with a novel thermoplastic semiconducting composition comprising chlorinated polyethylene, ethylene ethyl acrylate and carbon black.
- compositions do not equal that of metals since the composition resitivities usually vary from about 1 to 10,000 ohm-centimeters. For this reason such compositions are usually referred to as semiconducting as they shall be in this application.
- a recent commercial interest in electric cables with semiconducting jackets, particularly for direct burial, has been stimulated by the development of cables of a type described in US. Pat. No. 3,474,189. These cables have drain wires embedded in a semiconducting outer jacket that provides both electrical shielding and mechanical protection.
- Modern cables for burial service employ vulcanized compositions such as vulcanized polyethylene for insulation. This means that they have higher temperature ratings than thermoplastic-insulated cables.
- composition which is thermoplastic and so will not bond to cable insulation but is servicable at elevated temperatures, retains its electrical conductivity under adverse conditions, as shall be shown, and can be extruded at high speed.
- Our composition comprises a homogenous blend of -90 or, more preferably 50-80, or particularly 60-75 parts by weight of a chlorinated polyolefin such, preferably, as polyethylene; the difference to make up 100 parts by weight of ethylene ethyl acrylate; and 30-75 or, more preferably 40-60, or particularly 45-55 parts by weight of semiconducting carbon black.
- an electric cable comprising a conductor, a layer of polymeric insulation such, preferably as vulcanized polyethylene, surrounding the conductor, and a semiconducting thermoplastic polymeric jacket directly surrounding the insulation.
- the jacket comprises 50-80 or, preferably, 65-75 parts by weight of chlorinated polyethylene, the difference to make 100 parts by weight of ethylene ethyl acrylate, and 40-60 or, preferably, 45-55 parts by weight of semiconducting carbon black.
- FIGURE shows a pictorial lengthwise view of a cable of our invention.
- a cable suitable for underground power service is indicated generally by the numeral 10.
- a conductor 1 which may be stranded, is covered in known manner by a layer 12 of semiconducting strand shielding composition.
- the conductor, including the layer 12 is insulated with a surrounding layer 13 of vulcanized polyethylene.
- Our invention has particular utility where the insulation 13 is vulcanized because the cable can then make most advantage of the high-temperature properties of the jacket, to be described.
- vulcanized compositions such as ethylene propylene copolymers or diene terpolymers can also be employed within the scope of our invention, and, of course, certain advantages will still accrue where the insulation is thermoplastic, such as therrnoplastic polyolefin, although, generally, the temperature rating will then be lower.
- thermoplastic semiconducting jacket 14 into which drain wires have been embedded during the extrusion operation. Since the jacket 14 is in direct surface contact with the insulation 13 it would bond to the insulation if both were vulcanized.
- An advantage of our cable resides in the fact that the thermoplastic jacket can always be cleanly stripped, even from a vulcanized layer of insulation.
- EXAMPLE Parts by weight chlorinated polyethylene ethyl ethylene acrylate 30 semiconducting carbon black 50
- the chlorinated polyethylene of the EXAMPLE was obtained from Dow Chemical Company under the designation 2243.28, with a chlorine content of 25 percent, crystallinity of 28 percent and specific gravity of 1.08. Although we prefer to use chlorinated polyethylene with chlorine contents of 20-30 percent our invention includes chlorine contents of 15-70 percent.
- the ethylene ethyl acrylate of the EXAMPLE was supplied by the Union Carbide Plastics Company under the designation DPD-6169 having an ASTM D638 stiffness of 5000 psi, an ASTM D1505 density of 0.93 grams per cc and an ASTM D1238 melt index of 6.0 grams/10 minutes.
- the term ethylene ethyl acrylate, as used in this application applies to copolymers of ethylene and ethyl acrylate, which are commercially available with combined ethyl acrylate contents of about 3-25 percent by weight.
- the semiconducting carbon black of the EXAMPLE was supplied by Godfrey L. Cabot, Inc. under the designation Vulcan XC-72.
- semiconducting carbon blacks suitable for the practice of our invention are, however, commercially available from a number of sources known to persons skilled in plastic compounding arts.
- the lead phthalate and stearate serve as stabilizers and the epoxy as an extrusion lubricant.
- antimony oxide can be used or Dechlorane furnished by the Hooker Electrochemical Company, and a suitable antioxidant is polymerized 1,2-dihydro-2,2,4-trimethylquinoline.
- suitable antioxidants of which a number are well known to plastic compounders can also be used within the scope of our invention.
- suitable compounding agents are known that can be employed within the scope of our invention which is not limited except as hereinafter specifically claimed.
- Resistivity tests of the composition of the EXAMPLE were conducted over a period of five weeks in accordance with the following schedule: specimens were aged in a 90C oven from 4:30 PM to 8:30 AM each weekday and over the Friday to Monday weekend. From 8:30 AM to 11:30 AM each weekday they were aged in a 130C oven. From 11:30 AM to 4:30 PM they were permitted to cool at room temperature. Resistivity measurements were made each weekday at 8:05 AM while the samples were in the 90C oven, at 1 1:05 AM while they were in the 130C oven and at 4 PM at room temperature.
- the resistivity of the composition of the EXAMPLE is seen not to rise excessively upon hot water immersion by the data of Table III. Measurements were made at room temperature.
- An electric cable comprising a conductor, a layer of polymeric insulation surrounding said conductor, and a semiconducting thermoplastic polymeric jacket directly surrounding said insulation; said jacket comprising: 50-80 parts by weight of chlorinated polyethylene, the difference to make 100 parts by weight of ethylene ethyl acrylate, and 40-60 parts by weight of semiconducting carbon black.
Abstract
Description
Claims (5)
- 2. The cable of claim 1 wherein said jacket comprises 65-75 parts by weight of chlorinated polyethylene and 45-55 parts by weight of said carbon black.
- 3. The cable of claim 1 wherein said insulation is vulcanized.
- 4. The cable of claim 2 wherein said insulation is vulcanized.
- 5. The cable of claim 3 wherein said insulation comprises polyethylene.
- 6. The cable of claim 4 wherein said insulation comprises polyethylene.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16774171A | 1971-07-30 | 1971-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3735025A true US3735025A (en) | 1973-05-22 |
Family
ID=22608624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00167741A Expired - Lifetime US3735025A (en) | 1971-07-30 | 1971-07-30 | Semiconducting composition and cable jacketed therewith |
Country Status (1)
Country | Link |
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US (1) | US3735025A (en) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3951871A (en) * | 1974-05-16 | 1976-04-20 | Union Carbide Corporation | Deformation resistant shielding composition |
US4025715A (en) * | 1976-03-15 | 1977-05-24 | Alcan Aluminum Corporation | Shielded electric cable |
US4091139A (en) * | 1975-09-17 | 1978-05-23 | Westinghouse Electric Corp. | Semiconductor binding tape and an electrical member wrapped therewith |
US4096346A (en) * | 1973-01-31 | 1978-06-20 | Samuel Moore And Company | Wire and cable |
US4256921A (en) * | 1979-01-22 | 1981-03-17 | George Bahder | Moisture resistant cable |
US4303457A (en) * | 1975-10-06 | 1981-12-01 | Eaton Corporation | Method of making a semi-conductive paint hose |
US4361799A (en) * | 1980-03-27 | 1982-11-30 | Raychem Corporation | Over-temperature sense and locate device |
US4487057A (en) * | 1980-09-16 | 1984-12-11 | Raychem Corporation | Continuous sense and locate device |
US4584431A (en) * | 1984-10-11 | 1986-04-22 | Us Of America Secr Air Force | High voltage RF coaxial cable |
US5170010A (en) * | 1991-06-24 | 1992-12-08 | Champlain Cable Corporation | Shielded wire and cable with insulation having high temperature and high conductivity |
US5216204A (en) * | 1991-08-02 | 1993-06-01 | International Business Machines Corp. | Static dissipative electrical cable |
US5331606A (en) * | 1992-05-29 | 1994-07-19 | Western Atlas International, Inc. | Static dissipating data cable and seismic apparatus |
US5807447A (en) * | 1996-10-16 | 1998-09-15 | Hendrix Wire & Cable, Inc. | Neutral conductor grounding system |
US6197219B1 (en) | 1998-07-10 | 2001-03-06 | Pirelli Cables And Systems Llc | Conductive polymer composite materials and methods of making same |
US6315956B1 (en) | 1999-03-16 | 2001-11-13 | Pirelli Cables And Systems Llc | Electrochemical sensors made from conductive polymer composite materials and methods of making same |
AU740765B2 (en) * | 1998-07-10 | 2001-11-15 | Prysmian Power Cables And Systems Usa, Llc | Conductive polymer composite materials and methods of making same |
US6337367B1 (en) | 2000-07-11 | 2002-01-08 | Pirelli Cables And Systems, Llc | Non-shielded, track resistant, silane crosslinkable insulation, methods of making same and cables jacketed therewith |
US6482386B2 (en) | 1999-12-02 | 2002-11-19 | Cabot Corporation | Carbon blacks useful in wire and cable compounds |
US6506492B1 (en) | 1998-07-10 | 2003-01-14 | Pirelli Cables & Systems, Llc | Semiconductive jacket for cable and cable jacketed therewith |
US20030228780A1 (en) * | 2002-05-16 | 2003-12-11 | Homac Mfg. Company | Electrical connector with anti-flashover configuration and associated methods |
US20030228779A1 (en) * | 2002-05-16 | 2003-12-11 | Homac Mfg. Company | Electrical connector including cold shrink core and thermoplastic elastomer material and associated methods |
US20030236023A1 (en) * | 2002-05-16 | 2003-12-25 | Homac Mfg. Company | Electrical connector with visual seating indicator and associated methods |
US20040102091A1 (en) * | 2002-05-16 | 2004-05-27 | Homac Mfg. Company | Electrical connector including thermoplastic elastomer material and associated methods |
US6790063B2 (en) | 2002-05-16 | 2004-09-14 | Homac Mfg. Company | Electrical connector including split shield monitor point and associated methods |
US20050208808A1 (en) * | 2002-05-16 | 2005-09-22 | Homac Mfg. Company | Electrical connector including silicone elastomeric material and associated methods |
US20060035498A1 (en) * | 2002-05-16 | 2006-02-16 | Homac Mfg. Company | Enhanced separable connector with thermoplastic member and related methods |
WO2011152969A1 (en) * | 2010-06-03 | 2011-12-08 | Dow Global Technologies Llc | Strippable insulation shield for cables |
US20160141077A1 (en) * | 2014-11-13 | 2016-05-19 | Hitachi Metals, Ltd. | Electric wire and cable |
US20190239398A1 (en) * | 2016-07-19 | 2019-08-01 | Autonetworks Technologies, Ltd. | Shield member, shield member-attached electric wire, intermediate product for shield member, and method for producing shield member |
EP2094773B2 (en) † | 2006-12-20 | 2020-02-12 | Dow Global Technologies LLC | Semi-conducting polymer compositions for the preparation of wire and cable |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953541A (en) * | 1958-06-16 | 1960-09-20 | Union Carbide Corp | Composition of polyethylene and a copolymer of ethylene and ethyl acrylate |
US3155631A (en) * | 1962-02-19 | 1964-11-03 | Du Pont | Semi-conductor, containing ethylene/ethyl acrylate copolymer, petroleum wax and carbon black |
US3260694A (en) * | 1962-01-09 | 1966-07-12 | Phelps Dodge Copper Prod | Cross-linked chlorinated polyethylene |
GB1150690A (en) * | 1967-05-23 | 1969-04-30 | Pirelli | Improvements in or relating to Medium Voltage Electric Cables |
US3571613A (en) * | 1970-05-20 | 1971-03-23 | Anaconda Wire & Cable Co | Cable system |
US3684821A (en) * | 1971-03-30 | 1972-08-15 | Sumitomo Electric Industries | High voltage insulated electric cable having outer semiconductive layer |
-
1971
- 1971-07-30 US US00167741A patent/US3735025A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953541A (en) * | 1958-06-16 | 1960-09-20 | Union Carbide Corp | Composition of polyethylene and a copolymer of ethylene and ethyl acrylate |
US3260694A (en) * | 1962-01-09 | 1966-07-12 | Phelps Dodge Copper Prod | Cross-linked chlorinated polyethylene |
US3155631A (en) * | 1962-02-19 | 1964-11-03 | Du Pont | Semi-conductor, containing ethylene/ethyl acrylate copolymer, petroleum wax and carbon black |
GB1150690A (en) * | 1967-05-23 | 1969-04-30 | Pirelli | Improvements in or relating to Medium Voltage Electric Cables |
US3571613A (en) * | 1970-05-20 | 1971-03-23 | Anaconda Wire & Cable Co | Cable system |
US3684821A (en) * | 1971-03-30 | 1972-08-15 | Sumitomo Electric Industries | High voltage insulated electric cable having outer semiconductive layer |
Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096346A (en) * | 1973-01-31 | 1978-06-20 | Samuel Moore And Company | Wire and cable |
US3951871A (en) * | 1974-05-16 | 1976-04-20 | Union Carbide Corporation | Deformation resistant shielding composition |
US4091139A (en) * | 1975-09-17 | 1978-05-23 | Westinghouse Electric Corp. | Semiconductor binding tape and an electrical member wrapped therewith |
US4303457A (en) * | 1975-10-06 | 1981-12-01 | Eaton Corporation | Method of making a semi-conductive paint hose |
US4025715A (en) * | 1976-03-15 | 1977-05-24 | Alcan Aluminum Corporation | Shielded electric cable |
US4256921A (en) * | 1979-01-22 | 1981-03-17 | George Bahder | Moisture resistant cable |
US4361799A (en) * | 1980-03-27 | 1982-11-30 | Raychem Corporation | Over-temperature sense and locate device |
US4487057A (en) * | 1980-09-16 | 1984-12-11 | Raychem Corporation | Continuous sense and locate device |
US4584431A (en) * | 1984-10-11 | 1986-04-22 | Us Of America Secr Air Force | High voltage RF coaxial cable |
US5170010A (en) * | 1991-06-24 | 1992-12-08 | Champlain Cable Corporation | Shielded wire and cable with insulation having high temperature and high conductivity |
US5216204A (en) * | 1991-08-02 | 1993-06-01 | International Business Machines Corp. | Static dissipative electrical cable |
US5331606A (en) * | 1992-05-29 | 1994-07-19 | Western Atlas International, Inc. | Static dissipating data cable and seismic apparatus |
AU664743B2 (en) * | 1992-05-29 | 1995-11-30 | I/O Exploration Products (U.S.A.) Inc. | Static dissipating data cable |
US5807447A (en) * | 1996-10-16 | 1998-09-15 | Hendrix Wire & Cable, Inc. | Neutral conductor grounding system |
US6046408A (en) * | 1996-10-16 | 2000-04-04 | Hendrix Wire & Cable, Inc. | Neutral conductor grounding system |
US6514608B1 (en) | 1998-07-10 | 2003-02-04 | Pirelli Cable Corporation | Semiconductive jacket for cable and cable jacketed therewith |
US6277303B1 (en) | 1998-07-10 | 2001-08-21 | Pirelli Cable Corporation | Conductive polymer composite materials and methods of making same |
AU740765B2 (en) * | 1998-07-10 | 2001-11-15 | Prysmian Power Cables And Systems Usa, Llc | Conductive polymer composite materials and methods of making same |
US6506492B1 (en) | 1998-07-10 | 2003-01-14 | Pirelli Cables & Systems, Llc | Semiconductive jacket for cable and cable jacketed therewith |
US6197219B1 (en) | 1998-07-10 | 2001-03-06 | Pirelli Cables And Systems Llc | Conductive polymer composite materials and methods of making same |
US6315956B1 (en) | 1999-03-16 | 2001-11-13 | Pirelli Cables And Systems Llc | Electrochemical sensors made from conductive polymer composite materials and methods of making same |
US6482386B2 (en) | 1999-12-02 | 2002-11-19 | Cabot Corporation | Carbon blacks useful in wire and cable compounds |
US6337367B1 (en) | 2000-07-11 | 2002-01-08 | Pirelli Cables And Systems, Llc | Non-shielded, track resistant, silane crosslinkable insulation, methods of making same and cables jacketed therewith |
US6830475B2 (en) | 2002-05-16 | 2004-12-14 | Homac Mfg. Company | Electrical connector with visual seating indicator and associated methods |
US7104823B2 (en) | 2002-05-16 | 2006-09-12 | Homac Mfg. Company | Enhanced separable connector with thermoplastic member and related methods |
US20030236023A1 (en) * | 2002-05-16 | 2003-12-25 | Homac Mfg. Company | Electrical connector with visual seating indicator and associated methods |
US20040102091A1 (en) * | 2002-05-16 | 2004-05-27 | Homac Mfg. Company | Electrical connector including thermoplastic elastomer material and associated methods |
US6790063B2 (en) | 2002-05-16 | 2004-09-14 | Homac Mfg. Company | Electrical connector including split shield monitor point and associated methods |
US6796820B2 (en) | 2002-05-16 | 2004-09-28 | Homac Mfg. Company | Electrical connector including cold shrink core and thermoplastic elastomer material and associated methods |
US6811418B2 (en) | 2002-05-16 | 2004-11-02 | Homac Mfg. Company | Electrical connector with anti-flashover configuration and associated methods |
US20030228780A1 (en) * | 2002-05-16 | 2003-12-11 | Homac Mfg. Company | Electrical connector with anti-flashover configuration and associated methods |
US6905356B2 (en) | 2002-05-16 | 2005-06-14 | Homac Mfg. Company | Electrical connector including thermoplastic elastomer material and associated methods |
US20050208808A1 (en) * | 2002-05-16 | 2005-09-22 | Homac Mfg. Company | Electrical connector including silicone elastomeric material and associated methods |
US20060035498A1 (en) * | 2002-05-16 | 2006-02-16 | Homac Mfg. Company | Enhanced separable connector with thermoplastic member and related methods |
US20030228779A1 (en) * | 2002-05-16 | 2003-12-11 | Homac Mfg. Company | Electrical connector including cold shrink core and thermoplastic elastomer material and associated methods |
US7104822B2 (en) | 2002-05-16 | 2006-09-12 | Homac Mfg. Company | Electrical connector including silicone elastomeric material and associated methods |
US20070004259A1 (en) * | 2002-05-16 | 2007-01-04 | Homac Mfg. Company | Electrical connector including silicone elastomeric material and associated methods |
US7351082B2 (en) | 2002-05-16 | 2008-04-01 | Homac Mfg. Company | Electrical connector including silicone elastomeric material and associated methods |
EP2094773B2 (en) † | 2006-12-20 | 2020-02-12 | Dow Global Technologies LLC | Semi-conducting polymer compositions for the preparation of wire and cable |
WO2011152969A1 (en) * | 2010-06-03 | 2011-12-08 | Dow Global Technologies Llc | Strippable insulation shield for cables |
US20130062096A1 (en) * | 2010-06-03 | 2013-03-14 | Suh Joon Han | Strippable Insulation Shield for Cables |
CN103038283A (en) * | 2010-06-03 | 2013-04-10 | 陶氏环球技术有限责任公司 | Strippable insulation shield for cables |
US8889992B2 (en) * | 2010-06-03 | 2014-11-18 | Dow Global Technologies Llc | Strippable insulation shield for cables |
US20160141077A1 (en) * | 2014-11-13 | 2016-05-19 | Hitachi Metals, Ltd. | Electric wire and cable |
US9812232B2 (en) * | 2014-11-13 | 2017-11-07 | Hitachi Metals, Ltd. | Electric wire and cable |
US20190239398A1 (en) * | 2016-07-19 | 2019-08-01 | Autonetworks Technologies, Ltd. | Shield member, shield member-attached electric wire, intermediate product for shield member, and method for producing shield member |
US11006555B2 (en) * | 2016-07-19 | 2021-05-11 | Autonetworks Technologies, Ltd. | Shield member, shield member-attached electric wire, intermediate product for shield member, and method for producing shield member |
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Owner name: ANACONDA-ERICSSON INC., A CORP. OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ANACONDA COMPANY, THE A CORP. OF DE;REEL/FRAME:003846/0822 Effective date: 19800728 Owner name: ANACONDA-ERICSSON INC., A CORP. OF, DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANACONDA COMPANY, THE A CORP. OF DE;REEL/FRAME:003846/0822 Effective date: 19800728 |
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Owner name: ANACONDA ACQUISITION CO., 17 SQUADRON BOULEVARD, N Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ERICSSON, INC., A CORP OF DE;REEL/FRAME:004364/0732 Effective date: 19850215 |