| 摘要 |
<p>The present invention relates to a polyethylene composition comprising a polyethylene base resin, which comprises
a. an ethylene copolymer as fraction (A), and
b. 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), and the base resin has
(i) a density of below 940 kg/m 3 , and
(ii) a MFR 2 at 190 °C / 2.16 kg of 0.001 to 10 g/10 min,
and the composition has
(iii) a flexural modulus of from 300 to 820 MPa, and
to a process for the production of such a composition, and to a pipe produced from such a composition.</p> |
