Resistance of NBR-Based Fuel Hose Tube to Fuel-Alcohol Blends

The recent history of NBR fuel hose tubes is reviewed, with special emphasis on retention of physical properties after exposure to various test media, including fuel-alcohol blends.

Also studied was the problem of permeability. It was found that one route to dramatically lowering permeabilities is the application of a thin veneer of nylon to an NBR base.