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Electrical devices comprising polymeric insulating or semiconducting members

  • US 5,246,783 A
  • Filed: 08/15/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 08/15/1991
  • Status: Expired due to Term
First Claim
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1. An electrically conductive device having reduced treeing without the need of a treeing inhibitor, said device comprising:

  • (a) an electrically conductive member comprising at least one electrically conductive substrate; and

    (b) at least one electrically insulating member substantially surrounding the electrically conductive member, wherein the insulating member comprises a polymer selected from the group consisting of ethylene polymerized with at least one comonomer selected from the group consisting of C3 to C20 alpha-olefins and C3 to C20 polyenes, and wherein the polymer has a density in the range Of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30, and a composition distribution breadth index greater than about 45 percent.

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