Multi-layer tubing assembly with foamed outer layer
AssigneeBundy Corporation
InventorHenry S. Hsich
Life of this patent
Estimating the term…
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.
Claims26
A multi-layer tubing assembly comprising:
- an extruded inner permeation-resistant layer of fluoropolymer;
- an adhesive layer co-extruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase in miscible with fluoropolymer and another phase is miscible with polyamide;
- and
- an outer layer of foamed polyamide coextruded around said adhesive layer.
A multi-layer tubing assembly comprising:
- an extruded inner permeation-resistant layer of fluoropolymer;
- an adhesive layer co-extruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase in miscible with fluoropolymer and another phase is miscible with polyamide;
- an polyamide layer coextruded around said adhesive layer;
- and
- an outer layer of foamed polyamide coextruded around said polyamide layer.
A multi-layer tubing assembly comprising:
- an extruded innermost semi-conductive layer of fluoropolymer;
- an inner permeation-resistant layer of fluoropolymer coextruded around said innermost layer;
- an adhesive layer co-extruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase in miscible with fluoropolymer and another phase is miscible with polyamide;
- and
- an outer layer of foamed polyamide coextruded around said adhesive layer.
A multi-layer tubing assembly comprising:
- an extruded innermost semi-conductive layer of fluoropolymer;
- an inner permeation-resistant layer of fluoropolymer coextruded around said innermost layer;
- an adhesive layer co-extruded around said inner layer, said adhesive layer is comprised of a polymer alloy having a multi-phase morphology wherein one phase in miscible with fluoropolymer and another phase is miscible with polyamide;
- an polyamide layer coextruded around said adhesive layer;
- and
- an outer layer of foamed polyamide coextruded around said polyamide layer.
Dependencies are inferred from the claim text.