Jacobson Holman, PLLC
Fuel hose of low fuel permeability
A hose of low fuel permeability has a fuel permeability in a bent state with R50 not more than three times a fuel permeability in a straight state, R50 being a bent state where the hose has its longitudinal axis bent to form an arc having a diameter of 100 mm. Its low fuel permeability is achieved if the resin forming its inner wall layer has a melt viscosity falling within a certain range, which can be obtained by, for example, increasing the degree of polymerization of the resin, or grafting a specific side chain to the main chain in each molecule of the resin, or if the resin has a volume swelling degree falling within a certain range, which can be obtained by copolymerizing a monomer having fuel resistance, or blending a polymer having fuel resistance. The hose maintains its low fuel permeability even if it may be subjected to a large load of bending stress as when it is used to form a fluid conveying line.
Tokai Rubber Industries, Ltd.
F B Y Y F
F16L B32B Y10T Y10S F16L
additional inventional additional additional inventional
Katsutoshi Hiroaki Shinji Tomohide Yoshimitsu
Mizuno Ito Iio Ito Ishida