CN1308964C - 具有耐冲击涂层的电缆 - Google Patents
具有耐冲击涂层的电缆 Download PDFInfo
- Publication number
- CN1308964C CN1308964C CNB988049716A CN98804971A CN1308964C CN 1308964 C CN1308964 C CN 1308964C CN B988049716 A CNB988049716 A CN B988049716A CN 98804971 A CN98804971 A CN 98804971A CN 1308964 C CN1308964 C CN 1308964C
- Authority
- CN
- China
- Prior art keywords
- cable
- coating
- foamed
- polymer
- cables
- 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
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 107
- 239000011248 coating agent Substances 0.000 title claims abstract description 92
- 229920000642 polymer Polymers 0.000 claims abstract description 97
- 238000005187 foaming Methods 0.000 claims abstract description 69
- 239000002861 polymer material Substances 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims description 65
- 239000004743 Polypropylene Substances 0.000 claims description 37
- 229920001155 polypropylene Polymers 0.000 claims description 37
- 239000004698 Polyethylene Substances 0.000 claims description 29
- 229920000573 polyethylene Polymers 0.000 claims description 29
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 28
- 229920001577 copolymer Polymers 0.000 claims description 28
- -1 polyethylene Polymers 0.000 claims description 24
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 18
- 239000005977 Ethylene Substances 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 230000035939 shock Effects 0.000 claims description 8
- 229920002943 EPDM rubber Polymers 0.000 claims description 6
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 6
- CGPRUXZTHGTMKW-UHFFFAOYSA-N ethene;ethyl prop-2-enoate Chemical compound C=C.CCOC(=O)C=C CGPRUXZTHGTMKW-UHFFFAOYSA-N 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims description 5
- 229920003052 natural elastomer Polymers 0.000 claims description 5
- 229920001194 natural rubber Polymers 0.000 claims description 5
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 3
- 229920005549 butyl rubber Polymers 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000004636 vulcanized rubber Substances 0.000 claims description 3
- 239000004711 α-olefin Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims 4
- 230000004888 barrier function Effects 0.000 claims 1
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical class 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 17
- 238000012545 processing Methods 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 5
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- 239000000203 mixture Substances 0.000 description 17
- 238000009413 insulation Methods 0.000 description 14
- 230000008859 change Effects 0.000 description 12
- 239000006260 foam Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 230000008054 signal transmission Effects 0.000 description 10
- 239000000945 filler Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 6
- 239000012212 insulator Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
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- 239000011800 void material Substances 0.000 description 5
- 239000004604 Blowing Agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004156 Azodicarbonamide Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 2
- 235000019399 azodicarbonamide Nutrition 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 1
- CAWGQUPKYLTTNX-UHFFFAOYSA-N 3,4,5,6-tetrahydro-2,7-benzodioxecine-1,8-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=CC=C12 CAWGQUPKYLTTNX-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
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
-
- 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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/185—Sheaths comprising internal cavities or channels
-
- 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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/189—Radial force absorbing layers providing a cushioning effect
Landscapes
- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
- Ropes Or Cables (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Paints Or Removers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97107969.4 | 1997-05-15 | ||
EP97107969 | 1997-05-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1255229A CN1255229A (zh) | 2000-05-31 |
CN1308964C true CN1308964C (zh) | 2007-04-04 |
Family
ID=8226797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB988049716A Expired - Lifetime CN1308964C (zh) | 1997-05-15 | 1998-05-08 | 具有耐冲击涂层的电缆 |
Country Status (38)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101694787B (zh) * | 2009-09-28 | 2011-09-21 | 深圳市联嘉祥科技股份有限公司 | 视频安防监控的新型同轴电缆及其生产方法 |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010009198A1 (en) | 1998-03-04 | 2001-07-26 | Sergio Belli | Electrical cable with self-repairing protection |
ITMI981658A1 (it) | 1998-07-20 | 2000-01-20 | Pirelli Cavi E Sistemi Spa | Cavo ibrido elettrico ed ottico per installazioni aeree |
US7087842B2 (en) | 1999-12-20 | 2006-08-08 | Pirelli Cavi E Sistemi S.P.A. | Electric cable resistant to water penetration |
DE60135095D1 (de) | 2000-02-21 | 2008-09-11 | Prysmian Cavi Sistemi Energia | Schlagfestes selbstlöschendes elektrisches kabel |
US7195807B2 (en) | 2000-04-25 | 2007-03-27 | Prysmian Cavi E Sistemi Energia S.R.L. | Method for protecting joints for electrical cables, protective coating for said joints and joints thus protected |
US6908673B2 (en) | 2000-06-28 | 2005-06-21 | Pirelli Cavi E Sistemi S.P.A. | Cable with recyclable covering |
US8257782B2 (en) | 2000-08-02 | 2012-09-04 | Prysmian Cavi E Sistemi Energia S.R.L. | Electrical cable for high voltage direct current transmission, and insulating composition |
US6824870B2 (en) | 2000-09-28 | 2004-11-30 | Pirelli S.P.A. | Cable with recyclable covering |
US7465880B2 (en) | 2000-11-30 | 2008-12-16 | Prysmian Cavi E Sistemi Energia S.R.L. | Process for the production of a multipolar cable, and multipolar cable produced therefrom |
CA2429985C (en) * | 2000-11-30 | 2012-02-21 | Pirelli S.P.A. | Process for the production of a multipolar cable, and multipolar cable produced therefrom |
ES2320856T3 (es) | 2000-12-06 | 2009-05-29 | Prysmian S.P.A. | Procedimiento para la produccion de un cable con un recubrimiento recicable. |
US6903263B2 (en) | 2000-12-27 | 2005-06-07 | Pirelli, S.P.A. | Electrical cable, particularly for high voltage direct current transmission or distribution, and insulating composition |
US6824815B2 (en) | 2000-12-27 | 2004-11-30 | Pirelli Cavi E Sistemi S.P.A. | Process for producing an electrical cable, particularly for high voltage direct current transmission or distribution |
US6740396B2 (en) | 2001-02-26 | 2004-05-25 | Pirelli Cavi E Sistemi S.P.A. | Cable with coating of a composite material |
RU2295144C2 (ru) * | 2001-06-04 | 2007-03-10 | Пирелли Энд К. Спа | Оптический кабель, снабженный механически-прочной оболочкой |
CA2449023C (en) | 2001-06-04 | 2011-09-27 | Pirelli & C. S.P.A. | Optical cable provided with a mechanically resistant covering |
WO2003023791A1 (en) | 2001-09-10 | 2003-03-20 | Pirelli & C. S.P.A. | Extrusion method and apparatus for producing a cable |
DK1306859T3 (da) * | 2001-10-22 | 2007-05-07 | Nexans | Kabel med ekstruderet yderkappe og fremgangsmåde til fremstilling af kablet |
CN1326159C (zh) * | 2002-04-16 | 2007-07-11 | 皮雷利&C.有限公司 | 电缆及其制造过程 |
WO2004003939A1 (en) * | 2002-06-28 | 2004-01-08 | Sergio Belli | Impact resistant compact cable |
WO2004057626A1 (en) | 2002-12-23 | 2004-07-08 | Pirelli & C. S.P.A. | Method for producing a coating layer made of expandable and cross-linkable material in a cable |
WO2004066317A1 (en) | 2003-01-20 | 2004-08-05 | Gabriele Perego | Cable with recycable covering layer |
EP1649471B1 (en) * | 2003-07-25 | 2016-09-07 | Prysmian S.p.A. | Continuous process for manufacturing electrical cables |
CN1868006B (zh) | 2003-09-30 | 2010-04-28 | 普雷斯曼电缆及系统能源有限公司 | 具有从废材料制备的包覆层的电缆及其制备方法 |
US7514633B2 (en) * | 2003-12-03 | 2009-04-07 | Prysmian Cavi E Sistemi Energia S.R.L. | Impact resistant cable |
CA2563956C (en) | 2004-04-27 | 2013-03-26 | Prysmian Cavi E Sistemi Energia S.R.L. | Process for manufacturing a cable resistant to external chemical agents |
BRPI0418923B1 (pt) | 2004-06-28 | 2013-06-18 | cabo, método para melhorar a resistência à rachadura por tensão ambiental de um cabo, e, uso de uma composição | |
KR101082455B1 (ko) | 2004-11-23 | 2011-11-11 | 프리즈미안 카비 에 시스테미 에너지아 에스 알 엘 | 케이블 제조 방법 |
BRPI0520072B1 (pt) | 2005-04-27 | 2016-02-16 | Prysmian Cavi Sistemi Energia | método para fabricar um cabo e aparelho para extrudar um material polimérico |
US7884284B2 (en) | 2005-10-25 | 2011-02-08 | Prysmian Cavi E Sistemi Energia S.R.L. | Energy cable comprising a dielectric fluid and a mixture of thermoplastic polymers |
US7999188B2 (en) | 2007-06-28 | 2011-08-16 | Prysmian S.P.A. | Energy cable |
BRPI0722294B1 (pt) | 2007-12-14 | 2018-05-22 | Prysmian S.P.A. | Artigo elétrico, e, composição polimérica semicondutora |
CN102822257B (zh) | 2010-01-29 | 2014-03-12 | 普睿司曼股份公司 | 能量电缆 |
US20130233604A1 (en) | 2010-11-25 | 2013-09-12 | Gabriele Perego | Energy cable having a voltage stabilized thermoplastic electrically insulating layer |
BR112013015109B1 (pt) | 2010-12-23 | 2020-07-07 | Prysmian S.P.A. | cabo |
EP2656356B1 (en) | 2010-12-23 | 2017-08-09 | Prysmian S.p.A. | Continuous process for manufacturing a high voltage power cable |
AU2011374503B2 (en) | 2011-08-04 | 2016-04-07 | Prysmian S.P.A. | Energy cable having a thermoplastic electrically insulating layer |
WO2013171550A1 (en) | 2012-05-18 | 2013-11-21 | Prysmian S.P.A. | Process for producing an energy cable having a thermoplastic electrically insulating layer |
US10297372B2 (en) | 2012-05-18 | 2019-05-21 | Prysmian S.P.A | Process for producing an energy cable having a thermoplastic electrically insulating layer |
BR112015010623B1 (pt) | 2012-11-14 | 2020-09-15 | Prysmian S.P.A | Processo para recuperar rejeitos de uma composição polimérica, cabo, e, uso de uma composição polimérica |
CN103509257A (zh) * | 2013-08-30 | 2014-01-15 | 安徽天民电气科技有限公司 | 一种105℃低烟无卤阻燃三元乙丙橡胶电缆料及其制备方法 |
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US10703496B2 (en) | 2017-04-21 | 2020-07-07 | General Electric Company | Propulsion system for an aircraft |
JP6855966B2 (ja) * | 2017-07-19 | 2021-04-07 | 住友電装株式会社 | ワイヤハーネス |
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IT201900002609A1 (it) | 2019-02-22 | 2020-08-22 | Prysmian Spa | Metodo per estrarre sottoprodotti di reticolazione da un sistema isolante elettrico reticolato di un cavo energia e relativo cavo energia. |
JP2022544644A (ja) * | 2019-07-01 | 2022-10-20 | ダウ グローバル テクノロジーズ エルエルシー | 発泡低密度ポリエチレン絶縁体組成物 |
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