| abstract |
PIPE AND PROCESS FOR PRODUCING A COATED PIPE The present invention deals with coated pipes, with a layer of multimodal polyethylene. Multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having 4 to 10 carbon atoms, and has a weight average molecular weight of 70,000 g/mol to 250,000 g/mol, weight ratio weight average molecular to number average molecular weight, Mw/Mn, from 15 to 50, an MFR2 melt index of 0.05 g/10 min to 5 g/10 min, an MFR5 melt index of 0.5 to 0 g /10 min, and a density of 930 kg/m3 to 955 kg/m3. Tubes can be coated with high productivity and good production economy. Coatings have good mechanical properties. |