Importance

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Abstract

The invention relates to a two-layered plastic tubing piece for pressurized fluid conduits comprising an inner layer and an outer layer. The inner layer is formed from a first mixture comprising an elastomeric co-polyolefin or a blend of a partially crystalline polyolefin and a synthetic olefin rubber, as well as a homopolyamide. The outer layer is formed from a second mixture comprising a homopolyamide. According to the invention, both mixtures of the inner layer and the outer layer comprise the same homopolyamide wherein an impact modifier from the class of acid-modified ethylene-α-olefin copolymers is added to each of these mixtures and wherein the homopolyamide has a melting point of above 200° C. and has an average of at least 8 C atoms per monomer unit. The two-layered plastic tubing piece according to the invention is preferably formed as a fluid conduit for automobiles, in particular as a cooling line for automobiles.

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First Claim