ПОЛИЭТИЛЕНОВАЯ КОМПОЗИЦИЯ ДЛЯ ФОРМОВАНИЯ С РАЗДУВОМ, ПРЕДНАЗНАЧЕННАЯ ДЛЯ ИЗГОТОВЛЕНИЯ БОЛЬШИХ КОНТЕЙНЕРОВ

摘要

The invention relates to a polyethylene composition with multimodal molecular mass distribution, which is particularly suitable for the blow molding of large containers with a volume in the range of from 10 to 150 dm³ (I). The composition has a density in the range of from 0.949 to 0.955 g/cm³ at 23° C. and an MFI_190/5 in the range of from 0.1 to 0.3 dg/min. It comprises from 38 to 45% by weight of a low-molecular-mass ethylene homopolymer A, from 30 to 40% by weight of a high-molecular-mass copolymer B made from ethylene and from another 1-olefin having from 4 to 8 carbon atoms, and from 18 to 26% by weight of an ultrahigh-molecular-mass ethylene copolymer C.