Coating processes – Electrical product produced
Patent
1996-08-01
1998-06-23
Beck, Shrive
Coating processes
Electrical product produced
427307, 427336, 29828, 264343, B05D 512
Patent
active
057702578
ABSTRACT:
A method of altering a portion of the semiconductive layer of an electric power cable, to increase its resistance so as to render it electrically insulative. The semiconductive layer is loaded with carbon powder which forms chains to provide conductive pathways through the layer. By introducing an intercalant into the semiconductive layer, which causes the layer to swell, the conductive pathways are interrupted and the material is rendered insulative (>10.sup.4 .OMEGA.-cm). The intercalant may be a polymerizable material with a curing agent which is cured in situ, i.e., without removing the semiconductive layer from the cable. By this method, flashover to the semiconductive layer at a cable splice or termination may be prevented without requiring tedious removal of the exposed portion of the semiconductive layer. The method is usable with both strippable and coextruded semiconductive layers.
Guilbert Curtis Roy
Hulme-Lowe Alan George
Mooney Justine Anne
Shreve Gary A.
Somasiri Nanayakkara Liyanage Don
Beck Shrive
McNutt Matthew B.
Minnesota Mining and Manufacturing Company
Talbot Brian K.
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