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US 2010/0300571 A1Published application
Low-Permeation Flexible Fuel Hose
AssigneeThe Gates Corporation
InventorsLance Miller, Dana Stripe, Douglas D. Schelhaas
Life of this patent
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Abstract
A flexible hose or a tubing having a barrier layer of polyamide 6 having branched molecular structure and an impact modifier, and/or a flexural modulus of 1 to 2 GPa and a tensile elongation of 100% or more. The hose may have additional layers such as an inner tube, an outer cover, a textile or wire reinforcement, or the like. Permeability to ethanol- and methanol-containing fuels is very low.
Claims27
A flexible hose comprising:
- a barrier layer comprising polyamide 6 having branched molecular structure and impact modifier.
A fuel hose comprising:
- a non-fluorinated rubber inner tube;
- a non-fluorinated rubber outer cover;
- an intermediate barrier layer consisting essentially of polyamide 6 having a flexural modulus of from about 1 to about 2 GPa and a tensile elongation at break of 100% or more;
- and
- a textile reinforcement disposed between said barrier layer and said outer cover.
2 more elements
A hose system comprising:
- at least one length of hose comprising a barrier layer consisting essentially of polyamide 6 having at least two of a branched molecular structure, an impact modifier, a flexural modulus of 1 to 2 GPa, and a tensile elongation of 100% or more;
- and
- at least one fitting, clamp, or fluid-handling device.
Dependencies are inferred from the claim text.