| abstract |
Multi-layer composites, particularly thermoplastic composites, in form of an extruded hollow section, e.g. tubes or hoses for liquid fuel lines, include a thermoplastic outer layer and at least one further layer, wherein the outer layer is formed by a mixture based on (A) 80 to 20 parts by weight of at least one polyamide (PA) and (B) 20 to 80 parts by weight of at least one polyamide elastomer (TPE-A), of polyether amides, polyester amides, polyether ester amides, polyether ester ether amides or mixtures thereof, wherein the sum of (A) and (B) is 100 parts by weight, the hollow section having been produced at higher extrusion speeds, of over 20 m/min, so that the produced hollow section has a higher elongation at break, of over 200%, compared to an otherwise identical hollow section, which has been produced at lower extrusion speeds and a hollow section with a polyamide outer layer without polyamide elastomer additive, which has been produced at the same extrusion speed, wherein the elongation at break has been measured at the finished hollow section according to DIN EN ISO 527-2. |