Process for manufacturing a cable resistant to external chemical agents

摘要

Process for manufacturing a cable comprising the following steps:(a) conveying at least one conductor to an extruder apparatus;(b) extruding an insulating coating layer radially external to said at least one conductor; (c) longitudinally folding a metal tape around said extruded insulating coating layer, said metal tape bearing at least one adhesive coating layer in a radially external position; (e) extruding at least one continuous coating layer comprising at least one polyamide or a copolymer thereof around and in contact with said folded metal tape; wherein the step (e) is carried out at a draw down ratio (DDR) not higher than 2.5, preferably of from 1.2 to 2.0.

主权项

1. A cable comprising:
at least one conductor; at least one insulating coating layer around said at least one conductor; at least one metal tape longitudinally folded around said at least one insulating coating layer, said metal tape bearing on its externally facing surface at least one ethylene based adhesive coating layer, wherein the longitudinally folded metal tape has a thickness of 0.05 mm to 1.0 mm and overlapping edges; at least one continuous coating layer comprising at least one polyamide or a copolymer thereof in a radially external position with respect to said at least one adhesive coating layer, said continuous coating layer being in contact with said at least one adhesive coating layer; at least one further adhesive coating layer in a radially inner position with respect to said at least one metal tape, said at least one further adhesive coating layer being in contact with said at least one metal tape; and at least one coating layer made of expanded polymeric material in a radially inner position with respect to said at least one metal tape.