Patent ID: 6329054
Filing Date: 2001-12-11
Classification: C08F,C08L,G02B,H01B,Y10T

Abstract:
A method for using a cable-sheathing composition comprising:applying a cable-sheathing composition as an outer sheath for a power cable, wherein the cable-sheathing composition comprises a multimodal molecular weight distribution ethylene polymer mixture obtained by polymerization of ethylene in more than one stage, the ethylene polymer mixture having a density of about 0.915-0.955 g/cm.sup.3 and a melt flow rate of about 0.1-3.0 g/10 min, said ethylene polymer mixture comprising at least a first and a second ethylene polymer, of which the first has a density and a melt flow rate selected from the group consisting of: (a) about 0.955-0.975 g/cm.sup.3 and about 100-1000 g/10 min and (b) about 0.88-0.93 g/cm.sup.3 and about 0.01-0.8 g/10 min., wherein the multimodal molecular weight distribution ethylene polymer mixture after extrusion as a cable-sheathing at 180.degree. C. or 210.degree. C. a shrinkage according to UNI-5079 of 1% or less when held at 23.degree. C. for 24 hours and a shrinkage of 1% or less when held at 100.degree. C. for 24 hours.