Claims
- 1. A coated metal tubing arrangement comprising:a metal tube; an inner layer of a first polymeric material bonded to said metal tube, said inner layer capable of providing chemical resistance and preventing corrosion of said metal tube; and an outer layer of a multi-phase polymer immediately adjacent and surrounding said inner layer, said multi-phase polymer has at least two polymer components, each of said components has a distinct glass-transition temperature, at least one of which should be below room temperature, said outer layer unbonded to said inner layer, said outer layer capable of absorbing impact energy.
- 2. A coated metal tubing arrangement as claimed in claim 1 wherein said first polymeric material has a dampening factor of less than 0.05.
- 3. A coated metal tubing arrangement as claimed in claim 1 wherein said first polymeric material has a flexural modulus of at least 100 MPa.
- 4. A coated metal tubing arrangement as claimed in claim 1 wherein said multi-phase polymeric has a dampening factor of at least 0.05.
- 5. A coated metal tubing arrangement as claimed in claim 4 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.
- 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 multi-phase polymer is extruded over said inner layer.
Parent Case Info
This is a continuation of application Ser. No. 08/806,232, filed on Feb. 24, 1997, now U.S. Pat. No. 5,972,450, which is a continuation-in-part of application Ser. No. 08/541,855, filed on Oct. 10, 1995, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
58-42449 |
Mar 1983 |
JP |
Non-Patent Literature Citations (1)
Entry |
Derwent Abstract of JP 58-42449; Mitsui Petrochem Ind; Crack and Cold Resistant Coated Metal Tube, Mar. 1983. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
08/806232 |
Feb 1997 |
US |
Child |
09/370424 |
|
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/541855 |
Oct 1995 |
US |
Child |
08/806232 |
|
US |