Reinforcing member and an article, such as a pressure vessel, containing the reinforcing member

Patent metadata

Field	Value
Publication number	US-10072757-B2
Application number	US-200913001523-A
Country	US
Kind code	B2
Filing date	Jun 24, 2009
Priority date	Jun 24, 2008
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

The invention relates to a reinforcing liner comprising load-bearing yarns of a first type characterized in that the liner further comprises load-bearing yarns of a second type having a creep rate {acute over (ε)} 2 of at least 10 times higher than the creep rate {acute over (ε)} 1 of the yarns of first type, i.e. {acute over (ε)} 2 ≥10×{acute over (ε)} 1 , wherein the creep rates are measured on the yarns at a temperature of 20° C. and under an applied load of 600 MPa. The invention also relates to a pressure vessel comprising thereof.

First claim

The invention claimed is:

1. A reinforcing member comprising first and second types of load-bearing yarns, wherein
the first type of load-bearing yarns have a creep rate {acute over (ε)} 1 and are comprised of a first type of continuous filaments, and wherein
the second type of load-bearing yarns have a creep rate {acute over (ε)} 2 and are comprised of a second type of continuous filaments, and wherein
the creep rate {acute over (ε)} 2 of the second type of load-bearing yarns is at least 10 times higher than the creep rate {acute over (ε)} 1 of the first type of load-bearing yarns to thereby satisfy a relationship:
{acute over (ε)} 2 ≥10×{acute over (ε)} 1

wherein the creep rates {acute over (ε)} 1 and {acute over (ε)} 2 are measured on the first and second types of load-bearing yarns, respectively, at a temperature of 20° C. and under an applied load of 600 MPa.

2. The reinforcing member of claim 1 , wherein the first type of load-bearing yarns are polymeric yarns.

3. The reinforcing member of claim 1 , wherein the second type of load-bearing yarns are polymeric yarns.

4. The reinforcing member of claim 1 , wherein the creep rate {acute over (ε)} 2 is at least 30 times higher than the creep rate {acute over (ε)} 1 .

5. The reinforcing member of claim 1 wherein the creep rate {acute over (ε)} 2 is at least 10 −9 sec −1 and the creep rate {acute over (ε)} 1 is at most 10 −8 sec −1 .

6. The reinforcing member of claim 1 , wherein the first type of load-bearing yarns have a fracture strain F 1 , and the second type of load-bearing yarns have a fracture strain F 2 , and wherein a ratio F 1 /F 2 is between 1.1 and 6.

7. The reinforcing member of claim 1 , wherein the first type of load-bearing yarns are manufactured from aromatic copolyamide prepared from terephthaloyl chloride and equimolar proportions of p-phenylenediamine and 3,4′-diaminodiphenylether, and the second type of load-bearing yarns are manufactured from ultra high molecular weight polyethylene (UHMWPE).

8. The reinforcing member of claim 1 wherein the first type of load-bearing yarns contained by the member are present in the member in a mass % amount of between 20% and 80% based on total mass of the first and second types of load-bearing yarns.

9. The reinforcing member of claim 1 further comprising a resin.

10. The reinforcing member according to claim 1 wherein the member is a liner.

11. The reinforcing member of claim 1 , wherein each of the first and second types of load-bearing yarns have a linear configuration.

12. The reinforcing member of claim 1 , wherein the second load-bearing yarns elongate by creep under a tension force at which strain induced in the first type of load-bearing yarns is about equal to fracture strain of the first type of load-bearing yarns.

13. A pressure vessel comprising the member of claim 1 .

14. A pressure vessel having a vessel wall reinforced with the member of claim 1 , wherein the second type of load-bearing yarns are elongated by creep under a stress induced by deformation of the vessel wall achieved by pressurizing the vessel at a pressure of at most a pressure at which strain induced in the first type of load-bearing yarns is about equal to fracture strain of the first type of load-bearing yarns.

15. The pressure vessel of claim 11 , wherein the pressure vessel is a pipe.

16. An article comprising a member according to claim 1 , wherein the article is selected from the group consisting of a rope, a suture, a cable, a sling, a composite, a liner, and a chain construction.

17. The article of claim 16 , wherein the member increases efficiency of the article to above 100%.

Assignees

• Bosman Rigobert
• Marissen Roelof
• Dsm Ip Assets Bv

Inventors

• Bosman Rigobert
• Marissen Roelof

Classifications

• F16J12/00 Primary

  Pressure vessels in general (covers therefor F16J13/00; for particular applications, see the relevant subclasses, e.g. B01J, F17C, G21C) · CPC title

• F17C2205/0192

  with external bearing means · CPC title

• F17C2205/0188

  Hanging up devices · CPC title

• F17C2203/0663

  in form of fibers or filaments · CPC title

• F17C2203/0656

  in form of filaments · CPC title