Polyethylene composition for use in insulations and joints...

Details Polyethylene composition for use in insulations and joints... Polyethylene composition for use in insulations and joints...

C - Chemistry, Metallurgy

08

L

C08L 23/04 (2006.01) C08K 5/14 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2116380

46 ABSTRACT OF THE DISCLOSURE A polyethylene composition which is useful in insulations and joints of extra-high voltage power cables, and in which a cross-linking agent, comprising an organic peroxide subjected to purification processing, and an antioxidant, are blended, wherein the cross-linked composition has a dielectric loss tangent (tan.delta.) of less than or equal to 0.07% at a temperature of 90°C and under an electric field stress of 20 kV/mm. This polyethylene composition exhibits little dielectric loss, even at high temperatures or high electric field stresses, and is optimally employed in insulations and joints for extra-high voltage power cables of 275 kV or more.

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