Electrically-conductive hose

• US 20060127620A1
• Filed: 07/01/2005
• Published: 06/15/2006
• Est. Priority Date: 12/14/2004
• Status: Active Grant

• Current Assignee: William C. Fisher
• Original Assignee: William C. Fisher
• Inventors: Fisher, William C.
• Granted Patent: US 8,394,471 B2
• Time in Patent Office: Days
• US Class Current: 428/36.910
• CPC Class Codes: F16L 11/082 two layers
• CPC Class Codes: F16L 11/127 electrically conducting
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/139 Open-ended, self-supporting conduit, cylinder, or tube-type article
• CPC Class Codes: Y10T 428/1393 Multilayer [continuous layer]

Abstract

Tubular polymeric composite for articles such as tubing and hoses. The composite is formed of a tubular first layer of a thermoplastic block polyether amide resin (PEBA) filled with a more structured carbon black particulate filler to render it electrically-conductive, and a tubular second layer of a thermoplastic polyamide, polyester, polyolefins, or other thermoplastic resin compatible with the PEBA resin of the first material, and which second material optionally may be filled with a less structured carbon black particulate filler to render it electrically-conductive.

Claims

1. An article comprising a tubular polymeric composite member, the composite member comprising a tubular first layer and a tubular second layer concentric with the first layer, wherein:

the first layer comprises a first material comprising an admixture of a first thermoplastic resin selected from the group consisting of polyether block amides and copolymers and mixtures thereof, and a more structured carbon black particulate filler; and

the second layer comprises a second material different from the first material comprising a second thermoplastic resin compatible with the first thermoplastic resin.

2. The article of claim 1 wherein the more structured carbon black particulate filler has one or both of a BET surface area of at least about 500 m²/g, and a DBP pore volume of greater than about 300 ml/100 g.

3. The article of claim 1 wherein the more structured carbon black particulate filler has a BET surface area of at least about 500 m²/g.

4. The article of claim 1 wherein the first and second layer are adjoining.

5. The article of claim 1 wherein the first and second layers are fusion bonded directly together.

6. The article of claim 1 wherein the first material comprises between about 6-25% by weight based on the total weight of the first material of the more structured carbon black particulate filler.

7. The article of claim 1 wherein the first layer has surface resistivity of not greater than about 104 Ω

/sq-cm.

8. The article of claim 1 wherein the second material comprises an admixture of the second thermoplastic resin and a less structured carbon black particulate filler.

9. The article of claim 8 wherein the less structured carbon black particulate filler has one or both of a BET surface area of not greater than about 200 m²/g, and a DBP adsorption of not greater than about 300 ml/100 g.

10. The article of claim 9 wherein the less structured carbon black particulate filler has a BET surface area of at least about 500 m²/g.

11. The article of claim 8 wherein the second material comprises between about 12-34% by weight based on the total weight of the second material of the less structured carbon black particulate filler.

12. The article of claim 8 wherein the second layer has surface resistivity of not greater than about 10⁵ Ω

/sq-cm.

13. The article of claim 8 wherein each of the first layer and the second layer has a surface resistivity, the surface resistivity of the second layer being between about 10-250 times higher than the surface resistivity of the first layer.

14. The article of claim 1 wherein each of the first layer and the second layer has a thickness, the thickness of the second layer being between about 1.2-4.8 times greater than the thickness of the first layer.

15. The article of claim 1 wherein the second thermoplastic resin is selected from the group consisting of polyamides, polyolefins, and copolymers and mixtures thereof.

16. An article comprising a tubular polymeric composite member, the composite member comprising a tubular first layer and a tubular second layer concentric with the first layer, wherein:

the first layer comprises a first material comprising an admixture of a first thermoplastic resin selected from the group consisting of polyether block amides and copolymers and mixtures thereof, and a more structured carbon black particulate filler; and

the second layer comprises a second material different from the first material comprising a admixture of a second thermoplastic resin compatible with the first thermoplastic resin, and a less structure carbon black.

17. The article of claim 16 wherein:

the more structured carbon black particulate filler has a BET surface area of at least about 500 m²/g, and a DBP pore volume of greater than about 300 ml/100 g; and

the less structured carbon black particulate filler has a BET surface area of not greater than about 200 m²/g, and a DBP adsorption of not greater than about 300 ml/100 g.

18. The article of claim 16 wherein the first and second layer are adjoining.

19. The article of claim 16 wherein the first and second layers are fusion bonded directly together.

20. The article of claim 16 wherein:

the first material comprises between about 6-25% by weight based on the total weight of the first material of the more structured carbon black particulate filler; and

the second material comprises between about 12-34% by weight based on the total weight of the second material of the less structured carbon black particulate filler.

21. The article of claim 16 wherein:

the first layer has surface resistivity of not greater than about 10⁴ Ω

/sq-cm and

the second layer has surface resistivity of not greater than about 10⁵ Ω

/sq-cm.

22. The article of claim 16 wherein each of the first layer and the second layer has a surface resistivity, the surface resistivity of the second layer being between about 10-250 times higher than the surface resistivity of the first layer.

23. The article of claim 16 wherein each of the first layer and the second layer has a thickness, the thickness of the second layer being between about 1.2-4.8 times greater than the thickness of the first layer.

24. The article of claim 16 wherein the second thermoplastic resin is selected from the group consisting of polyamides, polyolefins, and copolymers and mixtures thereof.

25. An article comprising a tubular polymeric composite member, the composite member comprising a tubular first layer and a tubular second layer concentric with and adjoining the first layer, wherein:

the first layer comprises a first material comprising an admixture of a first thermoplastic resin selected from the group consisting of polyether block amides and copolymers and mixtures thereof, and a more structured carbon black particulate filler;

the second layer comprises a second material different from the first material comprising a admixture of a second thermoplastic resin compatible with the first thermoplastic resin, and a less structure carbon black; and

the first and second layers are fusion bonded directly together.

26. The article of claim 25 wherein:

the more structured carbon black particulate filler has a BET surface area of at least about 500 m²/g, and a DBP pore volume of greater than about 300 ml/100 g; and

the less structured carbon black particulate filler has a BET surface area of not greater than about 200 m²/g, and a DBP adsorption of not greater than about 300 ml/100 g.

27. The article of claim 25 wherein:

the first material comprises between about 6-25% by weight based on the total weight of the first material of the more structured carbon black particulate filler; and

the second material comprises between about 12-34% by weight based on the total weight of the second material of the less structured carbon black particulate filler.

28. The article of claim 25 wherein:

the first layer has surface resistivity of not greater than about 10⁴ Ω

/sq-cm; and

the second layer has surface resistivity of not greater than about 10⁵ Ω

/sq-cm.

29. The article of claim 25 wherein each of the first layer and the second layer has a surface resistivity, the surface resistivity of the second layer being between about 10-250 times higher than the surface resistivity of the first layer.

30. The article of claim 25 wherein each of the first layer and the second layer has a thickness, the thickness of the second layer being between about 1.2-4.8 times greater than the thickness of the first layer.

31. The article of claim 25 wherein the second thermoplastic resin is selected from the group consisting of polyamides, polyolefins, and copolymers and mixtures thereof.