A high voltage direct current cable insulation is made from a blend which includes an ethylene copolymer, such as ethylene-alpha olefin copolymer, with low crystallinity to reduce physical space charge trapping sites, a polar polymer modifier in an effective amount to enhance local conductivity to leak...http://www.google.com.au/patents/US6670554?utm_source=gb-gplus-sharePatent US6670554 - High-voltage direct current cable insulation
