POLYETHYLENE BLOW MOLDING COMPOSITION FOR PRODUCING LARGE CONTAINERS

摘要

The invention relates to a polyethylene composition with multimodal molecula r 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 0.955g/cm3 at 23 ~C and an MFI190/5 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 % b y weight of an ultrahigh-molecular-mass ethylene copolymer C.