Process for reducing micro-voids in the extruded insulation...

Details Process for reducing micro-voids in the extruded insulation... Process for reducing micro-voids in the extruded insulation...

H - Electricity

01

B

18/1174, 337/56

H01B 13/14 (2006.01)

Patent

CA 1136370

PROCESS FOR REDUCING MICRO-VOIDS IN THE EXTRUDED INSULATION OF ELECTRIC CABLES ABSTRACT OF THE DISCLOSURE A process for reducing micro-voids in cross-linked cable insulation without reducing the voltage breakdown strength thereof in which process the insulation, after cross-linking, is heated at a temperature in the range from about 120°C to about 150°C and under a pressure less than 10 mm. Hg for a period from about 8 hours to 48 hours. Also, a cable having such insulation which has micro-voids less than about 102 per mm3 and a perforation gradient greater than the perforation gradient of a cable which has not been so treated.

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