Low dielectric loss power cable sheaths comprising high...

Details Low dielectric loss power cable sheaths comprising high... Low dielectric loss power cable sheaths comprising high...

C - Chemistry, Metallurgy

08

L

C08L 23/04 (2006.01) C08G 18/00 (2006.01) H01B 7/00 (2006.01)

Patent

CA 2693704

Power cables that comprise a sheath layer, e.g., an insulation layer, are produced from a mixture of a high pressure polyolefin free of silane functionality, e.g., high pressure low density polyethylene, and a polyether polyol of which at least 50 percent of its molecules comprise no more than a single hydroxyl functionality. Preferably, the power cable is a medium or high voltage power cable, and the polyolefin is crosslinked as the sheath layer is fabricated and/or subsequent to the fabrication of the sheath layer.

L'invention concerne des câbles d'alimentation qui comportent une couche de gaine, par exemple une couche d'isolation, qui sont produits à partir d'un mélange d'une poly(oléfine) haute pression exempte de fonctionnalité silane, par exemple du poly(éthylène) haute pression faible densité et un poly(éther) polyol dont au moins 50 pour cent de ses molécules ne comportent pas plus d'une simple fonctionnalité hydroxyle. De préférence, le câble d'alimentation est un câble d'alimentation moyenne ou haute tension et la poly(oléfine) est réticulée lors de la fabrication de la couche de gaine et/ou après la fabrication de la couche de gaine.

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