abstract |
There is provided a flexible hose or tubing having a barrier layer of a polyamide 6 having an impact modifier and / or a branched molecular structure, a flexural modulus of 1 to 2 GPa, and / or a flexural modulus of 100% or more. The hose may have additional layers such as HNBR rubber inner tube, EVM / CPE blend rubber outer cover, fabric or wire reinforcement, and the like. The permeability to ethanol- and methanol-containing fuels is very low. The permeability to B20 biofuels is very low. |