Patent ID: 6645411
Filing Date: 2003-11-11
Classification: B29C,B29K,C08J,H01B

Abstract:
A process for the production of an electric cable comprising at least one conducting wire coated with cross-linked polyethylene, the process comprising the steps of:mixing (i) a material made of polyethylene, (ii) a fluid cross-linking agent, and (iii) stabilizer to form a mixture; melting said mixture in an extruder to form a melt; extruding said melt onto the electrical conducting wire to form an extruded layer on the wire; and cross-linking said extruded layer by heating to a temperature above the decomposition temperature of the cross-linking agent, wherein:said material made of polyethylene comprises a mixture of granulate, meal, or powder made of a polyethylene homopolymer and a polyethylene copolymer; said polyethylene copolymer comprises at least one of ethylene-butyl acrylate (EBA), ethylene-ethyl acrylate (EEA) and ethylene-methyl acrylate (EMA), and said acrylate portion of said polyethylene copolymer is from 10-30 wt % of said copolymer; and said polyethylene copolymer is between 1 and 8 weight percent of said extruded layer.