Pipe comprising super slow crack growth resistant polyethylene

A pipe or a supplementary pipe article comprising a polyethylene composition comprising a base resin which comprises

• (A) an ethylene homopolymer fraction having an MFR2, measured according to ISO 1133 at 190° C. and a load of 2.16 kg, in the range of 300 to 600 g/10 min, and
• (B) an ethylene copolymer fraction,
• wherein fraction (A) has a lower average molecular weight than fraction (B), and wherein the base resin has
• a density in the range of 0.945 to 0.949 g/cm3,
• an MFR5, measured according to ISO 1133 at 190° C. and a load of 5 kg, in the range of 0.2 to 0.4 g/10 min,
• a comonomer content of higher than 2.0 wt.-%,
• an SHI(2.7/210) in the range of 66 to 90, and
• a Charpy Impact Strength, measured according to ISO 179/1eA at 0° C., of more than 19 kJ/m2, and
• a FRR21/5 in the range of 30 to 60.

A method for producing a pipe or a supplementary pipe article, comprising:

• extruding or injection moulding a polyethylene composition comprising a base resin which comprises:
• (A) a first ethylene homo- or copolymer fraction, and
• (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower average molecular weight than fraction (B), and the base resin has
• a density in the range of 0.945 to 0.949 g/cm3 and
• an MFR5, measured according to ISO 1133 at 190° C. and a load of 5 kg, in the range of 0.2 to 0.4 g/10 min and
• a comonomer content of higher than 2.0 wt.-% and
• a SHI(2.7/210) in the range of 66 to 90 and
• a FRR21/5 in the range of 30 to 60.