EP0892979B1 - Ethylene polymer composition for cable applications - Google Patents
Ethylene polymer composition for cable applications Download PDFInfo
- Publication number
- EP0892979B1 EP0892979B1 EP97917761A EP97917761A EP0892979B1 EP 0892979 B1 EP0892979 B1 EP 0892979B1 EP 97917761 A EP97917761 A EP 97917761A EP 97917761 A EP97917761 A EP 97917761A EP 0892979 B1 EP0892979 B1 EP 0892979B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cable
- polymer
- ethylene
- percent
- density
- 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
- H01B3/18—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
- 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
Definitions
- Another aspect of the present invention is a cable jacket comprising the polyethylene composition of the invention which has at least 10 percent, preferably at least 20 percent, more flexibility than a cable made using conventional heterogeneous linear ethylene polymer having about the same density as the inventive polyethylene composition.
- the long chain branches are not the same as the short chain branches resulting from incorporation of the comonomer.
- the short chain branches are six carbons in length, while the long chain branches for such a substantially linear ethylene/1-octene copolymer are at least seven carbons in length, but usually much longer than seven carbons.
- m melt index measurement Another measurement useful in characterizing the molecular weight of the homogeneously branched substantially linear ethylene/ ⁇ -olefin interpolymers is conveniently indicated m melt index measurement according to ASTM D-1238, condition 190°C/10 kg (formerly know as "Condition (N)" and also known as I 10 ).
- the ratio of the I 10 and I 2 melt index is the melt flow ratio and is designated as I 10 /I 2 .
- the I 10 /I 2 ratio for the homogeneously branched linear ethylene/ ⁇ -olefin interpolymers is about 5.6.
- the ethylene polymer to be combined with the homogeneously branched linear or substantially linear ethylene/ ⁇ -olefin interpolymer is a heterogeneously branched ethylene polymer, preferably a heterogeneously branched (for example, Ziegler polymerized) interpolymer of ethylene with at least one C 3 -C 20 ⁇ -olefin (for example, linear low density polyethylene (LLDPE)).
- a heterogeneously branched (for example, Ziegler polymerized) interpolymer of ethylene with at least one C 3 -C 20 ⁇ -olefin for example, linear low density polyethylene (LLDPE)
- compositions disclosed herein can be formed by any convenient method, including dry blending the individual components and subsequently melt mixing or by pre-melt mixing in a separate extruder (for example, a Banbury mixer, a Haake mixer, A Brabender internal mixer, or a twin screw extruder).
- a separate extruder for example, a Banbury mixer, a Haake mixer, A Brabender internal mixer, or a twin screw extruder.
- the composition of the present invention may be further fabricated into desired cable of the present invention by using any known fabrication method.
- the composition of the present invention may be used not only for cable jacketing, but also cable insulation or any layer of a cable.
- the composition described herein may be heated, melted, kneaded and extruded by a mono- or bi-axial extruder through an extrusion die such as a cross-head die so as to be applied onto a core substrate, and then it may be subjected to a cooling step, or the next coating step if desired. Multiple layers of polymers may be applied onto the core substrate if desired.
- a core wrap 8 which may be a suitable plastic or other material.
- a binder can be placed around core wrap 8 to hold it in position about core 2, a layer of conductive metal is placed about the core.
- a thin aluminum layer 10 having a longitudinal seam 14 therein advantageously can be used for lightning protection and shielding. Longitudinal seam 14 is not required to be soldered or otherwise mechanically joined, a steel layer 20 having unsoldered overlapping edges 16 and 18 forming a longitudinal seam 17 is longitudinally wrapped about aluminum layer 10 to provide protection from mechanical forces such as abrasion. The use of an unsoldered seam 17 for steel layer 20 is possible, since the cable core 2 is waterproof.
- a cable was produced by using polymer D, which is a currently available polyethylene (for example UCC 8864 by Union Carbide) having melt index of 0.76 g/10minutes, I 10 /I 2 of 12.3, density of 0.942 g/cm 3 , and M w /M n of 3.7, and no long chain branching.
- Polymer D also contained 2.6 weight percent carbon black and about 400 ppm of a fluoroelastomer. The polymer was extruded onto cable as described in Example 1. Melt tension data and cable surface rating are reported in Table 1.
- Circumferential tensile samples were cut perpendicular to the cable axis from the finished cables prepared as described above, and the notch (due to the metal overlap) was centered within the gauge length.
- the test was carried out as described in ASTM D638 using Die V (5) (for example microtensile), with a 2.54 cm jaw separation and puling at 5.08 cmlminute. The results are reported in Table 3.
- the jacket bond test was conducted according to ASTM D 4565 for cables with a bonded steel sheath.
- a section of the cable jackets prepared as described above was removed by slitting the jacket longitudinally along the shield overlap.
- the cable was ringed circumferentantially with a knife, flexed at the cut point to break the steel shield at the ring.
- the metal sheath was opened, flattened, and the cable core was discarded.
- the specimen strip was cut in the circumferential direction. Three strips having a width of 13 mm were cut for each strip.
- the jacket was separated from the shield or armor only of a length sufficient to permit forming a tab of each sheath component.
- Three specimens were tested for each cable sample at a crosshead speed of 50 mm / minute.
- a room temperature bend test was conducted in a manner similar to ASTM 4565.
- the cable samples were conditioned at 20°C for 4 hours prior to testing.
- a cable sample was bent in the same manner as the cold bend test as described above, except the sample was bent around a mandrel having a diameter of 20 times the cable diameter.
- the polymers used in the cable of the present invention were less notch sensitive than the polymers currently available in the industry (for example Polymer D and G), comparing at about same density, for example, Polymers B and C have the higher elongation at break than Polymer G, and polymers E and F have the higher elongation at break than Polymer D, at almost all temperatures.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63132096A | 1996-04-10 | 1996-04-10 | |
US631320 | 1996-04-10 | ||
PCT/US1997/005297 WO1997038424A1 (en) | 1996-04-10 | 1997-04-01 | Ethylene polymer composition for cable applications |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0892979A1 EP0892979A1 (en) | 1999-01-27 |
EP0892979B1 true EP0892979B1 (en) | 2003-05-21 |
Family
ID=24530701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97917761A Expired - Lifetime EP0892979B1 (en) | 1996-04-10 | 1997-04-01 | Ethylene polymer composition for cable applications |
Country Status (16)
Country | Link |
---|---|
EP (1) | EP0892979B1 (xx) |
JP (1) | JP2000508466A (xx) |
KR (1) | KR20000005334A (xx) |
CN (1) | CN1097825C (xx) |
AR (1) | AR006572A1 (xx) |
AT (1) | ATE241203T1 (xx) |
AU (1) | AU2600797A (xx) |
BR (1) | BR9709117A (xx) |
CA (1) | CA2248654C (xx) |
DE (1) | DE69722197T2 (xx) |
ES (1) | ES2200173T3 (xx) |
ID (1) | ID18484A (xx) |
NO (1) | NO984715D0 (xx) |
TR (1) | TR199802018T2 (xx) |
TW (1) | TW374934B (xx) |
WO (1) | WO1997038424A1 (xx) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3252085A1 (en) | 2016-05-31 | 2017-12-06 | Borealis AG | Jacket with improved properties |
WO2019066516A1 (ko) * | 2017-09-29 | 2019-04-04 | 주식회사 엘지화학 | 배관용 수지 조성물의 장기 내구성 예측 방법 및 배관용 수지에 사용되는 올레핀계 고분자 |
KR20190037945A (ko) * | 2017-09-29 | 2019-04-08 | 주식회사 엘지화학 | 배관용 수지 조성물의 장기 내구성 예측 방법 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6103658A (en) * | 1997-03-10 | 2000-08-15 | Eastman Chemical Company | Olefin polymerization catalysts containing group 8-10 transition metals, processes employing such catalysts and polymers obtained therefrom |
US6822062B2 (en) | 1997-03-10 | 2004-11-23 | Eastman Chemical Company | Supported group 8-10 transition metal olefin polymerization catalysts |
AU1241600A (en) * | 1998-11-02 | 2000-05-22 | Dupont Dow Elastomers L.L.C. | Shear thinning ethylene/alpha-olefin interpolymers and their preparation |
WO2001014922A1 (en) * | 1999-08-23 | 2001-03-01 | Pirelli Cavi E Sistemi S.P.A. | Optical fiber cable with components having improved compatibility with waterblocking filling compositions |
US6658185B2 (en) | 1999-08-23 | 2003-12-02 | Pirelli Cavi E Sistemi S.P.A. | Optical fiber cable with components having improved compatibility with waterblocking filling compositions |
JP4007877B2 (ja) | 2002-08-07 | 2007-11-14 | 日本ジーイープラスチックス株式会社 | ワイヤ・ケーブル被覆材用樹脂組成物 |
JP2004161929A (ja) | 2002-11-14 | 2004-06-10 | Ge Plastics Japan Ltd | ワイヤ・ケーブル被覆材用樹脂組成物 |
US7517927B2 (en) | 2004-01-07 | 2009-04-14 | Sabic Innovative Plastics Ip B.V. | Flexible poly(arylene ether)composition and articles thereof |
IL180507A (en) | 2007-01-02 | 2011-04-28 | Teldor Wires And Cables Ltd | Flexible and water and rodent cable that is especially suitable for use as an optical communication cable |
US10811164B2 (en) * | 2010-03-17 | 2020-10-20 | Borealis Ag | Polymer composition for W and C application with advantageous electrical properties |
US10208196B2 (en) | 2010-03-17 | 2019-02-19 | Borealis Ag | Polymer composition for W and C application with advantageous electrical properties |
EP3485189A1 (en) * | 2016-07-14 | 2019-05-22 | SABIC Global Technologies B.V. | Method for determining time to brittle failure of a pipe made of polypropylene |
KR102486846B1 (ko) * | 2018-02-06 | 2023-01-10 | 주식회사 엘지화학 | 올레핀계 고분자 |
US12009121B2 (en) * | 2018-07-25 | 2024-06-11 | Dow Global Technologies Llc | Coated conductor |
CA3209174A1 (en) * | 2021-02-24 | 2022-09-01 | Wenke MIAO | Colorable polymeric compositions exhibiting enhanced aging properties |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3674915A (en) * | 1971-06-01 | 1972-07-04 | Phillips Petroleum Co | Electrical cable having an ethylene-1-olefin copolymer as the dielectric material |
KR100253826B1 (ko) * | 1991-12-30 | 2000-04-15 | 그레이스 스티븐 에스. | 에틸렌 공중합체의 중합방법 |
EP0572034A2 (en) * | 1992-05-29 | 1993-12-01 | Idemitsu Kosan Company Limited | Ethylenic copolymer and ethylenic copolymer composition |
ES2303346T3 (es) * | 1992-09-15 | 2008-08-01 | Dow Global Technologies Inc. | Modificacion de impacto de materiales termoplasticos. |
US5414040A (en) * | 1992-09-15 | 1995-05-09 | The Dow Chemical Company | Formulated ethylene/α-olefin elastomeric compounds |
DE69433347T2 (de) * | 1993-01-29 | 2004-04-15 | Dow Global Technologies, Inc., Midland | Ethylen Copolymerisation |
-
1997
- 1997-04-01 CA CA002248654A patent/CA2248654C/en not_active Expired - Fee Related
- 1997-04-01 CN CN97193722A patent/CN1097825C/zh not_active Expired - Fee Related
- 1997-04-01 TR TR1998/02018T patent/TR199802018T2/xx unknown
- 1997-04-01 WO PCT/US1997/005297 patent/WO1997038424A1/en active IP Right Grant
- 1997-04-01 DE DE69722197T patent/DE69722197T2/de not_active Expired - Lifetime
- 1997-04-01 EP EP97917761A patent/EP0892979B1/en not_active Expired - Lifetime
- 1997-04-01 JP JP9536275A patent/JP2000508466A/ja active Pending
- 1997-04-01 ES ES97917761T patent/ES2200173T3/es not_active Expired - Lifetime
- 1997-04-01 AU AU26007/97A patent/AU2600797A/en not_active Abandoned
- 1997-04-01 AT AT97917761T patent/ATE241203T1/de not_active IP Right Cessation
- 1997-04-01 KR KR1019980708053A patent/KR20000005334A/ko not_active Application Discontinuation
- 1997-04-01 BR BR9709117A patent/BR9709117A/pt not_active Application Discontinuation
- 1997-04-07 ID IDP971165A patent/ID18484A/id unknown
- 1997-04-09 TW TW086104543A patent/TW374934B/zh active
- 1997-04-09 AR ARP970101398A patent/AR006572A1/es unknown
-
1998
- 1998-10-09 NO NO984715A patent/NO984715D0/no not_active Application Discontinuation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3252085A1 (en) | 2016-05-31 | 2017-12-06 | Borealis AG | Jacket with improved properties |
WO2017207483A1 (en) | 2016-05-31 | 2017-12-07 | Borealis Ag | Jacket with improved properties |
WO2019066516A1 (ko) * | 2017-09-29 | 2019-04-04 | 주식회사 엘지화학 | 배관용 수지 조성물의 장기 내구성 예측 방법 및 배관용 수지에 사용되는 올레핀계 고분자 |
KR20190037945A (ko) * | 2017-09-29 | 2019-04-08 | 주식회사 엘지화학 | 배관용 수지 조성물의 장기 내구성 예측 방법 |
KR102184390B1 (ko) | 2017-09-29 | 2020-11-30 | 주식회사 엘지화학 | 배관용 수지 조성물의 장기 내구성 예측 방법 |
US11697699B2 (en) | 2017-09-29 | 2023-07-11 | Lg Chem, Ltd. | Method for predicting long-term durability of resin composition for piping and olefinic polymer used for resin for piping |
Also Published As
Publication number | Publication date |
---|---|
EP0892979A1 (en) | 1999-01-27 |
CN1097825C (zh) | 2003-01-01 |
NO984715L (no) | 1998-10-09 |
NO984715D0 (no) | 1998-10-09 |
ES2200173T3 (es) | 2004-03-01 |
BR9709117A (pt) | 1999-08-03 |
DE69722197D1 (de) | 2003-06-26 |
AR006572A1 (es) | 1999-09-08 |
ATE241203T1 (de) | 2003-06-15 |
AU2600797A (en) | 1997-10-29 |
KR20000005334A (ko) | 2000-01-25 |
CA2248654C (en) | 2004-05-25 |
CN1215497A (zh) | 1999-04-28 |
TW374934B (en) | 1999-11-21 |
ID18484A (id) | 1998-04-09 |
JP2000508466A (ja) | 2000-07-04 |
DE69722197T2 (de) | 2003-12-04 |
TR199802018T2 (xx) | 1999-01-18 |
CA2248654A1 (en) | 1997-10-16 |
WO1997038424A1 (en) | 1997-10-16 |
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