| 摘要 |
<p>The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises
c. an ethylene copolymer as fraction (A), and
d. an ethylene homo- or copolymer as fraction (B),
with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), the base resin having
(i) a density of below 940 kg/m 3 ,
and
(ii) a MFR 5 at 190 °C / 5.00 kg of at least 0.20 g/10 min, and
the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95°C and 4.3 MPa.</p> |
