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

F - Mech Eng,Light,Heat,Weapons

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F16L 11/04 (2006.01) B29C 47/06 (2006.01) B32B 1/08 (2006.01) B32B 5/18 (2006.01) B32B 7/12 (2006.01) B32B 27/08 (2006.01) B32B 27/30 (2006.01) B32B 27/34 (2006.01) C08J 5/12 (2006.01) C08K 3/04 (2006.01) C08L 27/12 (2006.01) F16L 9/12 (2006.01) F16L 11/12 (2006.01) F16L 11/127 (2006.01) C08J 9/06 (2006.01)

Patent

CA 2307452

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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