| abstract |
The subject of the invention is a method and an apparatus for obtaining a metal plastic composite tube.n n n At least inside this tube is simultaneously extruded a layer of grafted polyethylene which comes directly into contact with the metal and a layer of crosslinkable polyethylene, using a die having an annular channel 15 with two separate coaxial inlets 18, 19 and a single outlet 11.n n n The invention provides a composite tube having the malleability of lead, the rigidity of copper and total inertia to common aggressive agents. |