Chafe or fire sleeve for hose

DETAILED DESCRIPTION We claim: 1.
A chafe or fire sleeve for an aircraft fuel hose comprising an internal tube with an outer sleeve integrally formed thereon, said sleeve having a pair of coaxial layers, an outer of said coaxial layers being the chafe or fire sleeve made from a mixture of urethane and silicone elastomers, said urethane and silicone in said outer layer being mixed, with their proportions being in the range of 80% to 20% urethane and 20% to 80% silicone, respectively, and an inner of said coaxial layers being silicone.
2.
The chafe or fire sleeve of claim 1 wherein the proportions of said urethane and silicone are respectively approximately 70%/30%, and the cure time and temperature are five minutes at 350.
degree.
F.
3.
The chafe or fire sleeve of claim 1 wherein the sleeve is extruded onto said hose.
4.
The chafe or fire sleeve of claim 2 wherein the composition of said outer layer is:
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Material Composition
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Urethane 53%
Silicone 23%
Silica 5%
Treated Clay 8%
Dessicant 2%
Leveler 2%
Plasticizer 2%
Catalyst 1%
Pigment 3%
Minor Ingredients 1%
100%
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5.
The chafe or fire sleeve of claim 1 wherein said urethane and silicone are respectively approximately 50%/50%, and the cure time and temperature are five minutes at 350.
degree.
F.
6.
The chafe or fire sleeve of claim 5 wherein the composition of the outer layer is :
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Material Composition
______________________________________
Urethane 38%
Silicone 38%
Silica 5%
Treated Clay 7%
Dessicant 2%
Leveler 2%
Plasticizer 2%
Catalyst 2%
Pigment 3%
Minor Ingredients 1%
100%
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