| 摘要 |
The invention relates to a polyethylene composition with multimodal molecular mass distribution, which is particularly suitable for the blow moulding of canisters having a volume in the range of from 2 to 20 dm<SUP>3 </SUP>(I). The composition has a density in the range from 0.950 to 0.958 g/cm<SUP>3 </SUP>at 23° C. and an MFR<SUB>190/5 </SUB>in the range of from 0.30 to 0.50 dg/min. It comprises from 40 to 50% by weight of a low-molecular-mass ethylene homopolymer A, from 25 to 35% by weight of a high-molecular-mass copolymer B made from ethylene and from another olefin having from 4 to 8 carbon atoms, and from 24 to 28% by weight of an ultrahigh-molecular-mass ethylene copolymer C. |
