Manufacture of polyethylenes

A wherein the ethylene and forming α - olefin oligomeric catalyst and two of polymerization catalyst after preparing two or more polyethylene polyblends, wherein the polymerization catalyst one can be a copolymer of ethylene and at α the following conditions of an, and other thereof, wherein in the technical conditions of the easily copolymer of ethylene and α - olefin. The formed to be a heat-cured stream and/or processing the improved.