| abstract |
The invention relates to a plastic tube used for water supply.npotable, obtained by extrusion of thermoplastic polymers, comprising at leastntwo adjoining coaxial layers, namely a main polyolefin layerncovered on the outside with a thin barrier layer impermeable to the penetration ofnpollutants such as hydrocarbons inside the tube; this main layer isnmade of polyethylene, and the barrier layer consists of an alloy of polyamides andnpolyolefins, containing an adhesion additive such as a non-functionalized polyolefin.n n n The invention also relates to the process for producing this tube, and tonits use in the construction of buried networks of pipelines for thentransport of drinking water without pollution risks, in particular by hydrocarbons. |