Multi-layered fuel tubing
US-9528637-B2 · Dec 27, 2016 · US
Multi-layered fuel tubing
US9772052B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9772052-B2 |
| Application number | US-201514689214-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 17, 2015 |
| Priority date | May 1, 2008 |
| Publication date | Sep 26, 2017 |
| Grant date | Sep 26, 2017 |
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- Title
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- Abstract
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
The invention describes a flexible tubular article for transport of volatile hydrocarbons comprising: (a) an inner layer of a polyvinylidene difluoride (PVDF) polymer or a polyvinylidene difluoride copolymer; (b) an intermediate thermoplastic polyurethane (TPU) layer extruded in tubular form over the inner PVDF layer, and (c) a polyvinyl chloride polymer extruded in tubular form over the outside surface of the intermediate layer and being coextensive therewith. The tubular articles of the invention have a maximum permeation rating of 15 g/m 2 /day under SAE J1737 test conditions.
First claim
Opening claim text (preview).
What is claimed is: 1. A flexible multi-layer tubular article for transport of a volatile hydrocarbon comprising: (a) an inner layer of a polyvinylidene difluoride copolymer comprising trifluoroethylene or hexafluoropropylene; (b) an intermediate thermoplastic polyurethane (TPU) layer covering the inner PVDF or polyvinylidene difluoride copolymer layer; and (c) a polyvinyl chloride polymer layer, wherein the polyvinyl chloride polymer layer covers the outside surface of the intermediate TPU layer, wherein the polyvinyl chloride polymer optionally contains a stabilizer or a plasticizer or mixtures thereof. 2. The flexible multi-layer tubular article according to claim 1 wherein the TPU is a polyester polyurethane. 3. The flexible multi-layer tubular article according to claim 1 , wherein the optional stabilizer is an organo tin or Ba—Zn composition. 4. The flexible multi-layer tubular article according to claim 1 , wherein the optional plasticizer is a polyol diester. 5. The flexible multi-layer tubular article according to claim 1 , wherein the article has a maximum permeation rating of 15 g/m 2 /day. 6. The flexible multi-layer tubular article according to claim 1 , where in the article has a maximum permeation rating of 7 g/m 2 /day. 7. The flexible multi-layer tubular article according to claim 1 , where in the article has a maximum permeation rating of 5 g/m 2 /day. 8. The flexible multi-layer tubular article according to claim 1 , wherein the article has a maximum permeation rating of 15 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present. 9. The flexible multi-layer tubular article according to claim 1 , where in the article has a maximum permeation rating of 7 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present. 10. The flexible multi-layer tubular article according to claim 1 , where in the article has a maximum permeation rating of 5 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present. 11. A multi-layer tubular article consisting of: (a) an inner layer of a polyvinylidene difluoride polymer (PVDF) or a polyvinylidene difluoride copolymer; (b) an intermediate thermoplastic polyurethane (TPU) layer covering the inner PVDF or polyvinylidene difluoride copolymer layer; and (c) a polyvinyl chloride polymer layer, wherein the polyvinyl chloride polymer layer covers the outside surface of the intermediate TPU layer, wherein the polyvinyl chloride polymer optionally contains a stabilizer or a plasticizer or mixtures thereof. 12. The article according to claim 11 , wherein the TPU is a polyester polyurethane. 13. The article according to claim 11 , wherein the optional stabilizer is an organo tin or Ba—Zn composition. 14. The article according to claim 11 , wherein the optional plasticizer is a polyol diester. 15. The article according to claim 11 , wherein the article has a maximum permeation rating of 15 g/m 2 /day. 16. The article according to claim 11 , where in the article has a maximum permeation rating of 7 g/m 2 /day. 17. The article according to claim 11 , where in the article has a maximum permeation rating of 5 g/m 2 /day. 18. The article according to claim 11 , wherein the article has a maximum permeation rating of 15 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present. 19. The article according to claim 11 , where in the article has a maximum permeation rating of 7 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present. 20. The article according to claim 11 , where in the article has a maximum permeation rating of 5 g/m 2 /day when the optional stabilizer, plasticizer or mixtures thereof is present.
Assignees
Inventors
Classifications
Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels · CPC title
Resistant to heat · CPC title
with means connecting the layers, e.g. tie layers or undercuts · CPC title
Yield strength; Tensile strength · CPC title
Non-permeable · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9772052B2 cover?
- The invention describes a flexible tubular article for transport of volatile hydrocarbons comprising: (a) an inner layer of a polyvinylidene difluoride (PVDF) polymer or a polyvinylidene difluoride copolymer; (b) an intermediate thermoplastic polyurethane (TPU) layer extruded in tubular form over the inner PVDF layer, and (c) a polyvinyl chloride polymer extruded in tubular form over the outsid…
- Who is the assignee on this patent?
- Saint Gobain Performance Plastics Corp
- What technology area does this patent fall under?
- Primary CPC classification F16L11/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Sep 26 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).