rohrfu00f6rmige mehrschichtstruktur (mlt) for the transport of fuel, particularly gasoline, and especially alkoholhaltigem petrolfrom outside to inside at least one barriereschicht (1) and at least one inner layer (2) which, under the barriereschicht iswith the barriereschicht (1) for a evoh layer or a ppa - shift is;with the inner layer (2) or all layers (2) and the other optional layers, arranged below the barriereschicht is / are on average 0 to 1.5%.-% of plasticisers, relative to the total weight of the composition of the layer (2) or the total weight of all compositions of the layers (2) and the other optional layersare arranged below the barriereschicht contains / includeswith the inner layer (2) in a large proportion, at least, a polyamide or a polyamide containing the aliphatic type, of which more than 75% of aliphatic units.with the aliphatic polyamide is selected among:a a) polyamide with a mean number of carbon atoms per stickstoffatom, as ca), from 4 to 8.5, vorteilhafterweise from 4 to 7.a with b) polyamide with an average number of carbon atoms per stickstoffatom, the cb is described by 7 to 10, vorteilhafterweise of 7.5 to 9.5.a with c), with an average number of carbon atoms or a stickstoffatom, known as cc, from 9 to 18, vorteilhafterweise from 10 to 18.with the understanding that, if the inner layer (2) at least three polyamide comprises at least one of the polyamide (a), (b) or (c).
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