Aluminum foil based hose
An ultra low permeability fluid member for conveying a fluid (e.g., a hose, tube, etc.) having a metal vapor barrier layer ( 22 ) formed around an inner tube ( 14 ). The metal vapor layer ( 22 ) is formed from one or more metal strips ( 40 a, 40 b ) having edge portions ( 44 ) that are bonded so as to seal the vapor barrier layer ( 22 ) preventing permeation of vapor.
1. A hose member for conveying fluid comprising:
a first tubular layer;
a metal vapor barrier layer formed by at least one strip of metal surrounding the first tubular layer; and
a second tubular layer surrounding the metal vapor barrier layer;
wherein the at least one metal strip has edge portions joined together to form at least one seam, each edge portion having an outer face and an inner face, the inner faces being juxtaposed to form opposing faces, the opposing faces of the edge portions being metal-to-metal welded together; and wherein the at least one seam is folded over a portion of the metal strip adjacent the seam.
2. A hose member as set forth in claim 1 , wherein the at least one metal strip includes a pair of metal strips surrounding respective halves of the first tubular layer, and wherein each metal strip has opposite edge portions overlapping respective opposite edge portions of the other strip to form a pair of seams.
3. A hose member as set forth in claim 1 , wherein the at least one seam is ultrasonically welded.
4. A hose member as set forth in claim 1 , wherein at least a portion of the seam is bonded to a portion of the metal strip adjacent the seam.
5. A hose member as set forth in claim 1 , wherein the metal vapor barrier layer is bonded to at least one of the first tubular layer and second tubular layer.
6. A hose member as set forth in claim 1 , wherein the metal strip is aluminum foil.
7. A method of making a hose comprising:
providing a first tubular layer forming a conduit for the flow of fluid;
forming a metal vapor barrier layer with at least one strip of metal surrounding the first tubular layer, the metal vapor barrier layer having at least one radially outwardly extending seam running in the longitudinal direction of the hose that is folded over a portion of the metal strip adjacent the seam, the seam being formed by edge portions of the at least one strip, the edge portions having an outer face and an inner face, the inner faces being juxtaposed to form opposing faces;
welding together the opposing faces of the at least one strip of metal to form a metal-to-metal weld; and
providing a second tubular layer surrounding the metal vapor barrier layer.
8. A method as set forth in claim 7 , wherein the metal vapor barrier layer is formed with a pair of metal strips surrounding respective halves of the first tubular layer, and wherein each metal strip has opposite edge portions overlapping respective opposite edge portions to form a pair of seams.
9. A method as set forth in claim 7 , further comprising ultrasonically welding the at least one seam.
10. A method as set forth in claim 7 , further comprising bonding at least a portion of the seam to a portion of the metal strip adjacent the seam.
11. A method as set forth in claim 7 , further comprising providing a braid layer outside of the second tubular layer.
12. A method as set forth in claim 7 , further comprising bonding the metal barrier layer to at least one of the first tubular layer and the second tubular layer.
13. A method as set forth in claim 7 , wherein the bonding includes vulcanization.
14. A hose made by the method of claim 7 .
15. A hose member for conveying fluid comprising:
a first tubular layer;
a metal vapor barrier layer surrounding the first tubular layer, the metal vapor barrier layer formed as a metal tube having at least one longitudinal seam formed radially outward from the metal tube, the longitudinal seam formed by edge portions of the metal vapor barrier layer that are juxtaposed to form opposing faces, the longitudinal seam folded over a portion of the metal tube adjacent the longitudinal seam with the opposing faces of the metal vapor barrier layer being metal-to-metal welded together; and
a second tubular layer surrounding the metal vapor barrier layer.
16. A hose member as set forth in claim 15 , wherein the metal vapor barrier layer is formed from a pair of metal strips surrounding respective halves of the first tubular layer, and wherein each metal strip has opposite edge portions overlapping respective opposite edge portions of the other strip to form a pair of seams.
17. A hose member as set forth in claim 15 , wherein the at least one seam is ultrasonically welded.
18. A hose member as set forth in claim 15 , wherein at least a portion of the seam is bonded to a portion of the metal tube adjacent the seam.
19. A hose member as set forth in claim 15 , wherein the metal vapor barrier layer is bonded to at least one of the first tubular layer and second tubular layer.
20. A hose member as set forth in claim 15 , wherein the metal barrier layer is aluminum foil.