Multi-layer tubing assembly with foamed outer layer

Details Multi-layer tubing assembly with foamed outer layer Multi-layer tubing assembly with foamed outer layer

1999-05-19

2000-03-21

Brinson, Patrick

Pipes and tubular conduits

Flexible

Distinct layers

138141, 138140, 138DIG1, F16L 1104

Patent

active

060390859

ABSTRACT:
A multi-layer tubing for use in fluid transport applications. The tubing is suitable for conveying fluids containing hydrocarbons. The tubing comprises an extrudable adhesive layer of multi-phase polymer blends or alloys which is coextruded around a permeation-resistant layer of fluoropolymer. An outer layer of foamed polyamide is coextruded around the adhesive layer. The adhesive layer of polymer blends or alloys has a multi-phase morphology wherein one phase is miscible with the fluoropolymer for forming the permeation-resistant layer and another phase is miscible with the polyamide for forming the foamed outer layer.

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