EP 0880302 A3 19990526 - Heating cable and method producing the same

Title (en)

Heating cable and method producing the same

Title (de)

Heizkabel un Herstellungsverfahren

Title (fr)

Câble chauffant et procédé de fabrication

Publication

EP 0880302 A3 19990526 (EN)

Application

EP 98400785 A 19980402

Priority

NO 972275 A 19970520

Abstract (en)

[origin: EP0880302A2] The present invention relates to a heating cable comprising a core having two electrical conductors (4,5), a PTC element therebetween and an outer layer (3) of insulation material. The core comprises an extruded polymer center element (1) in which the two conductors (4,5) are arranged so that part of the conductor surfaces coincide with the center element surface, an extruded layer (2) of a PTC polymer arranged over the center element in contact with said conductor surface parts, and at least one outer extruded insulation sheath (3). The PTC layer (2) is based on ethylene and ethylene-octene copolymer with carbon black and silane grafted by direct feeding silane/peroxide or using a Master Batch with silane/peroxide/catalyst. <IMAGE>

IPC 1-7

H05B 3/56; H05B 3/14

IPC 8 full level

H05B 3/14 (2006.01); H05B 3/56 (2006.01)

CPC (source: EP)

H05B 3/146 (2013.01); H05B 3/56 (2013.01); H05B 2203/02 (2013.01)

Citation (search report)

[X] EP 0312204 A2 19890419 - RAYCHEM LTD [GB]
[A] US 4534889 A 19850813 - VAN KONYNENBURG PETER H [US], et al
[A] GB 1595198 A 19810812 - RAYCHEM CORP
[A] EP 0301864 A1 19890201 - MITSUI PETROCHEMICAL IND [JP]
[A] US 5236765 A 19930817 - CORDIA JOHANNES M [BE], et al
[A] US 5045673 A 19910903 - KELLY CORNELIUS J N [US]

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0880302 A2 19981125; EP 0880302 A3 19990526; EP 0880302 B1 20050309; DE 69829244 D1 20050414; DE 69829244 T2 20060209; DK 0880302 T3 20050627; NO 304920 B1 19990301; NO 972275 D0 19970520; NO 972275 L 19981123; PL 187743 B1 20040930; PL 326380 A1 19981123

DOCDB simple family (application)

EP 98400785 A 19980402; DE 69829244 T 19980402; DK 98400785 T 19980402; NO 972275 A 19970520; PL 32638098 A 19980519