Polyethylene composition having high swell ratio

A manufactured article comprising a polyethylene composition having the following properties:

• 1) a density from 0.945 to less than 0.952 g/cm3, determined according to ISO 1183 at 23° C.;
• 2) a MIF/MIP ratio from 15 to 30, wherein the MIF is the melt flow index at 190° C. with a load of 21.60 kg, and the MIP is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;
• and
• 3) a SIC Index from 2.5 to 5.5;
• wherein the SIC Index is the Shear-Induced Crystallization Index as determined according to the following relation:
• SIC Index=(tonset,SIC@1000×tonset,quiescent)/(HLMI)*100
• where tonset,SIC@1000 is measured in seconds and is the time required for crystallization onset under a shear rate of 1000 s−1, the tonset, quiescent is measured in seconds and is the crystallization onset time at a temperature of 125° C. under no shear, as determined in isothermal mode by differential scanning calorimetry;
• and HLMI is the melt flow index determined at 190° C. with a load of 21.6 kg, according to ISO 1133.