Patent ID: 6180721
Filing Date: 2001-01-30
Classification: H01B,Y10T

Abstract:
An insulated communication cable, wherein the insulation comprises a multimodal olefin polymer mixture, obtained by polymerisation of at least one .alpha.-olefin in more than one stage, having a density of about 0.920-0.965 g/cm.sup.3, a melt flow rate (MFR.sub.2) of about 0.2-5 g/10 min, an FRR.sub.21/2.gtoreq.60, and an environmental stress cracking resistance (ESCR) according to ASTM D 1693 A/10% Igepal, of at least 500 hours, said olefin polymer mixture comprising at least a first and a second olefin polymer, of which the first is selected from(a) a low molecular weight (MW) olefin polymer with a density of about 0.925-0.975 g/cm.sup.3 and a melt flow rate (MFR.sub.2) of about 300-20 000 g/10 min, and(b) a high molecular weight (MW) olefin polymer with a density of about 0.880-0.950 g/cm.sup.3 and a melt flow rate (MFR.sub.21) of about 0.5-20 g/10 min.