Fuel-carrying line which can be installed fixed with a predetermined length for a motor vehicle

摘要

Fuel-carrying line which can be installed fixed with a predetermined length for a motor vehicle, which line consists of a plastic tube with polyamide wall produced by extrusion by means of a screw. The polyamide wall has on the side facing the flow channel an alcohol barrier layer based on polyvinyl alcohol. This alcohol barrier layer has on the side facing the flow channel a water barrier layer based on polyamide. The polyamide wall, the alcohol barrier layer and the water barrier layer are combined by means of coextrusion so as to be integrally connected. The polyamide wall has a wall thickness which absorbs swelling of the water barrier layer due to alcohol absorption without troublesome enlargement of the predetermined length.