EP 2850619 B1 20190710 - PROCESS FOR PRODUCING AN ENERGY CABLE HAVING A THERMOPLASTIC ELECTRICALLY INSULATING LAYER
Title (en)
PROCESS FOR PRODUCING AN ENERGY CABLE HAVING A THERMOPLASTIC ELECTRICALLY INSULATING LAYER
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES STROMKABELS MIT EINER THERMOPLASTISCHEN ELEKTRISCH ISOLIERENDEN SCHICHT
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN CÂBLE ÉLECTRIQUE COMPRENANT UNE COUCHE D'ISOLATION ÉLECTRIQUE THERMOPLASTIQUE
Publication
Application
Priority
IB 2012052507 W 20120518
Abstract (en)
[origin: WO2013171550A1] Process for producing an energy cable comprising at least one electrically conductive core and at least one thermoplastic electrically insulating layer, which comprises the steps of: impregnating a thermoplastic material in subdivided solid form, having a melting enthalpy equal to or lower than 70 J/g, with a dielectric fluid to obtain an impregnated thermoplastic material; feeding said impregnated thermoplastic material in subdivided solid form to a single-screw extruder; and extruding the impregnated thermoplastic material onto said at least one electrically conductive core, so as to form said at least one thermoplastic electrically insulating layer; whereby said impregnated thermoplastic material is not subjected to any mechanical homogenization step in a molten state. The above process allows to obtain energy cables having a large amount of the dielectric fluid in the electrically insulting layer, e.g. higher than 10 wt%, without showing any morphological defects in the layer itself and any drawbacks in the extrusion process, even when the rotation speed of the extruder screw and therefore the cable production speed are high (e.g. higher than 20 m/min for medium voltage cable).
IPC 8 full level
H01B 3/22 (2006.01); H01B 3/14 (2006.01); H01B 3/20 (2006.01); H01B 3/44 (2006.01); H01B 7/02 (2006.01); H01B 13/14 (2006.01)
CPC (source: EP)
H01B 3/22 (2013.01); H01B 3/441 (2013.01); H01B 13/14 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013171550 A1 20131121; AU 2012379976 A1 20141127; AU 2012379976 B2 20161215; BR 112014028453 A2 20170627; BR 112014028453 B1 20200811; CA 2873531 A1 20131121; CA 2873531 C 20190917; CN 104364853 A 20150218; CN 104364853 B 20180316; DK 2850619 T3 20191014; EP 2850619 A1 20150325; EP 2850619 B1 20190710; ES 2749509 T3 20200320; RU 2590904 C1 20160710
DOCDB simple family (application)
IB 2012052507 W 20120518; AU 2012379976 A 20120518; BR 112014028453 A 20120518; CA 2873531 A 20120518; CN 201280074050 A 20120518; DK 12728796 T 20120518; EP 12728796 A 20120518; ES 12728796 T 20120518; RU 2014150555 A 20120518