Metal tubing coated with multiple layers of polymeric materials

Details Metal tubing coated with multiple layers of polymeric materials Metal tubing coated with multiple layers of polymeric materials

1997-02-24

1999-10-26

Dye, Rena L.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 369, 428 3691, 428209, 138137, 138139, 138143, 138146, 138DIG6, 138DIG7, F16L 9133, F16L 914

Patent

active

059724501

ABSTRACT:
A coated metal tubing arrangement comprises a metal tube. An inner layer of a first polymeric material is bonded to the tube to provide corrosion protection. The first polymeric material has a high crystallinity, a dampening factor of less than 0.05, and a flexural modulus of at least 100 MPa. An outer layer of a second polymeric material is extruded around the inner layer to absorb impact energies and to eliminate mechanical vibrations and acoustic noises. The second polymeric material has a dampening factor of at least 0.05 and a flexural modulus of less than 50 MPa. The second polymeric material is a multi-phase polymer having at least one polymer component with a glass-transition temperature below room temperature.

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