POLYETHYLENE COMPOSITION HAVING HIGH MECHANICAL PROPERTIES

摘要

Polyethylene composition with improved balance of environmental stress cracking resistance (FNCT) and impact resistance (Charpy), particularly suited for preparing pipes, said composition having the following features: 1) density from 0.945 to 0.955 g/cm3; 2) ratio MIF/MIP from more than 30 to 45; 3) Shear-Induced Crystallization Index SIC from 1.0 to 2.5; 4) Long Chain Branching index equal to or greater than 0.85.