Mixtures bimodal polyethylene high quality mixture.

A bimodal polyethylene blend with a melt rate MFR 190/21 6 6-14 g / 10 min, a density of 0, 94 0, 97 g / cm3, and a resistance to stress cracking ESCR, measured in a body-shaped test plate 40 mm diameter, 2 mm thick, notched on one side with a notch of length 20 mm and 0, 1 mm deep, immersed at 80 in a solution of Nekanil 1% and loaded to a pressure of 3 bar,> 150 h, containing 40 what 80% by weight of an ethylene copolymer of high molecular weight, with a weight-average molecular weight 300 000 g / mol and a distribution width molecular weight Mw / Mn of 1 12, and 20 Is 60% by weight of a reduced, with a weight-average molecular weight of 8000 homo- or copolymer molecular weight ethylene ?80000 g / mol, and a width of molecular weight distribution Mw / Mn of 2, 5 Is 12 wherein the mixing quality of the mixture, measured according to ISO 13949, less than 3.