Claims
- 1. A coated metal tubing arrangement comprising:a metal tube; an inner layer of first polymeric material surrounding said metal tube; an outer layer of a multi-phase polymer extruded immediately adjacent and surrounding said inner layer, said multiphase polymer having at least two polymer components, each of said polymer components having a distinct glass-transition temperature, said outer layer unbonded to said inner layer.
- 2. A coated tubing arrangement as claimed in claim 1 wherein said polymeric material forming said inner layer has a dampening factor of less than 0.05.
- 3. A coated metal tubing arrangement as claimed in claim 1 wherein said multi-phase polymer has a dampening factor of at least 0.05.
- 4. A coated metal tubing arrangement as claimed in claim 3 wherein said dampening factor of said multi-phase polymer is between 0.1 and 0.3 in an application temperature range between −50 and 150 degrees Celsius.
- 5. A coated metal tubing arrangement as claimed in claim 1 wherein said polymeric material forming said inner layer has a flexural modulus of at least 100 MPa.
- 6. A coated metal tubing arrangement as claimed in claim 1 wherein said multi-phase polymer has a flexural modulus lower than 50 MPa.
- 7. A coated metal tubing arrangement as claimed in claim 1 wherein said outer layer has a wall thickness greater than 50 microns.
- 8. A coated metal tubing arrangement as claimed in claim 7 wherein said outer layer has a wall thickness between 200 microns and 500 microns.
- 9. A coated tubing arrangement as claimed in claim 1 wherein fillers are disposed in said multi-phase polymer.
- 10. A coated metal tubing arrangement as claimed in claim 1 wherein said polymeric material forming said inner layer is selected from the group consisting of polyamide, polyvinyl fluoride, polyvinylidene fluoride, epoxies and an aluminum-based coating.
- 11. A coated metal tubing arrangement as claimed in claim 1 wherein said multi-phase polymer is comprised of copolymers or polymer blends of polymers selected from the group consisting of polyamides, polyesters, polyolefins, polyurethane and polyvinyl chloride.
- 12. A coated metal tubing arrangement comprising:a metal tube; an inner layer of fluoroplastic surrounding said metal tube; an outer layer of a blend of two or more polymers immediately adjacent and surrounding said inner layer, said polymer blend having at least two distinct glass-transition temperatures and at least two distinct melting points, at least one of said distinct glass-transition temperatures is below 22° C., at least one of said distinct melting points is above 100° C., said outer layer unbonded to said inner layer.
- 13. A coated metal tubing arrangement as claimed in claim 12 wherein said fluoroplastic forming said inner layer is polyvinyl fluoride.
- 14. A coated metal tubing arrangement as claimed in claim 12 wherein said fluoroplastic forming said inner layer is polyvinylidene fluoride.
- 15. A coated metal tubing arrangement comprising:a metal tube: an intermediate layer of fluoroplastic surrounding said metal tube; an outer layer of a blend of two or more polymers immediately adjacent and surrounding said intermediate layer, said polymer blend having at least two distinct glass-transition temperatures and at least two distinct melting points, at least one of said distinct glass-transition temperatures is below 22° C. at least one of said distinct melting points is above 100° C. said outer layer unbonded to said intermediate layer; said coated metal tubing arrangement further comprising an inner layer immediately adjacent and surrounding said metal tube, said intermediate layer of fluoroplastic immediately adjacent and surrounding said inner layer.
- 16. A coated metal tubing arrangement as claimed in claim 15 wherein material forming said inner layer is selected form the group consisting of chromate, phosphate and zinc.
- 17. A coated metal tubing arrangement comprising:a metal tube; an inner layer of nylon surrounding said metal tube; an outer layer of a blend of two or more polymers immediately adjacent and surrounding said inner layer, said polymer blend having at least two distinct glass-transition temperatures and at least tow distinct melting points, at least one of said distinct glass-transition temperatures is below 22° C., at least one of said distinct melting points if above 100° C., said outer layer unbonded to said inner layer.
- 18. A coated metal tubing arrangement comprising:a metal tube; an intermediate layer of nylon surrounding said metal tube; an outer layer of a blend of two or more polymers immediately adjacent and surrounding said intermediate layer, said polymer blend having at least two distinct glass-transition temperatures and at least tow distinct melting points, at least one of said distinct glass-transition temperatures is below 22° C., at least one of said distinct melting points if above 100° C. said outer layer unbonded to said intermediate layer; said metal tubing arrangement further comprising an inner layer immediately adjacent and surrounding said metal tube, said intermediate layer of nylon immediately adjacent and surrounding said inner layer.
- 19. A coated metal tubing arrangement as claimed in claim 18 wherein material forming said inner layer is selected from the group consisting of chromate, phosphate and zinc.
Parent Case Info
This is a continuation of U.S. patent application Ser. No. 09/370,424, filed on Aug. 9, 1999 now U.S. Pat. No. 6,589,617, which is a continuation of U.S. patent application Ser. No. 08/806,232, filed on Feb. 24, 1997, Pat. No. 5,972,450, which is a continuation-in-part of U.S. patent application Ser. No. 08/541,855, filed on Oct. 10, 1995, abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4606953 |
Suzuki et al. |
Aug 1986 |
A |
5601893 |
Strassel et al. |
Feb 1997 |
A |
Foreign Referenced Citations (1)
Number |
Date |
Country |
58-42449 |
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JP |
Continuations (2)
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Number |
Date |
Country |
Parent |
09/370424 |
Aug 1999 |
US |
Child |
10/153416 |
|
US |
Parent |
08/806232 |
Feb 1997 |
US |
Child |
09/370424 |
|
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/541855 |
Oct 1995 |
US |
Child |
08/806232 |
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US |