PROCESS FOR REDUCING MICRO-VOIDS IN THE EXTRUDED INSULATION OF ELECTRIC CABLES

摘要

PROCESS FOR REDUCING MICRO-VOIDS IN THE EXTRUDED INSULATION OF ELECTRIC CABLES 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.degree.C to about 150.degree.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.