Process for treating textile substrates

• US 6,676,710 B2
• Filed: 12/04/2000
• Issued: 01/13/2004
• Est. Priority Date: 10/18/2000
• Status: Expired due to Fees

• Current Assignee: North Carolina State University (University of North Carolina System)
• Original Assignee: North Carolina State University (University of North Carolina System)
• Inventors: Smith, Carl Brent, Hendrix, Walter A., Butcher, Donald L.
• Primary Examiner(s): Gupta, Yogendra N.
• Assistant Examiner(s): Hamlin, Derrick G
• Application Number:
  US09/729,566
• Publication Number:
  US 20020108183A1
• Time in Patent Office: 1,135 Days
• Field of Search: 810/7, 813/7, 813/9, 814/2, 840/4, 847/4, 847/5, 849/5, 891/6, 811/56, 811/61, 811/551, 134/42
• US Class Current: 8/115.51
• CPC Class Codes: D06B 19/00 Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
• CPC Class Codes: D06M 23/105 Processes in which the solvent is in a supercritical state
• CPC Class Codes: D06P 1/81 using dyes dissolved in inorganic solvents
• CPC Class Codes: D06P 1/94 using dyes dissolved in solvents which are in the supercritical state
• CPC Class Codes: Y10S 8/916 Natural fiber dyeing

Abstract

A process for treating a textile substrate, the process including the steps of providing a textile substrate; providing a treatment bath; entraining a transport material in the treatment bath wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath; and contacting the textile substrate with the transport material in the treatment bath to thereby treat the textile substrate with the treatment material in the transport material.

Claims

1. A process for treating a textile substrate, the process comprising:

(a) providing a textile substrate;

(b) providing a treatment bath fluid;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material entrained the treatment bath fluid to deliver the treatment material to the textile substrate and thereby treat the textile substrate with the treatment material in the transport material.

2. The process of claim 1, wherein the textile substrate comprises a hydrophilic fiber, a hydrophobic fiber, or a blend thereof.

3. The process of claim 2, wherein the hydrophilic fiber comprises a cellulosic fiber, a silk fiber, a wool fiber or a blend thereof.

4. The process of claim 3, wherein the cellulosic fiber is a cotton fiber.

5. The process of claim 1, wherein the treatment bath fluid comprises near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combination thereof.

6. The process of claim 1, wherein the transport material comprises water.

7. The process of claim 1, wherein the transport material is present in a trace amount.

8. The process of claim 1, wherein the treatment material comprises a dye, a bleach, an optical brightener, a softener, an anti-static agent, a lubricant, a scouring agent a sizing agent, an ultraviolet stabilizing agent, an antimicrobial agent, or combinations thereof.

9. The process of claim 1, wherein the treatment bath fluid is free of a surfactant that is soluble in the treatment bath fluid.

10. The process of claim 1, further comprising drying the textile substrate by removing the transport material from the textile substrate.

11. The process of claim 10, wherein the step of drying the textile substrate further comprises circulating the treatment bath fluid through the textile substrate to re-entrain the transport material in the treatment barn fluid, thereby removing transport material from the textile substrate.

37. The process of claim 1, wherein the transport material is entrained in the treatment bath fluid in droplets.

12. A process for treating a textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid,, the process comprising:

(a) providing a textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combinations thereof;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material entrained in the treatment bath fluid to deliver the treatment material to the textile substrate and thereby treat the textile substrate with the treatment material dissolved or suspended in the transport material.

13. The process of claim 12, wherein the textile substrate comprises a hydrophilic fiber, a hydrophobic fiber, or a blend thereof.

14. The process of claim 13, wherein the hydrophilic fiber comprises a cellulosic fiber, a silk fiber, a wool fiber or a blend thereof.

15. The process of claim 14, wherein the cellulosic fiber is a cotton fiber.

16. The process of claim 12, wherein the transport material comprises water.

17. The process of claim 12, wherein the transport material is present in a trace amount.

18. The process of claim 12, wherein the treatment material comprises a dye, a bleach, an optical brightener, a softener, an anti-static agent, a lubricant, a scouring agent, a sizing agent, an ultraviolet stabilizing agent, an antimicrobial agent, or blends thereof.

19. The process of claim 12, wherein the treatment bath fluid is free of a surfactant that is soluble in the treatment bath fluid.

20. The process of claim 12, further comprising drying the textile substrate by removing the transport material from the textile substrate.

21. The process of claim 20, wherein the step of drying the textile substrate further comprises circulating the treatment bath fluid through the textile substrate to re-entrain the transport material in the treatment bath fluid, thereby removing transport material from the textile substrate.

39. The process of claim 12, wherein the transport material is entrained in the treatment bath fluid in droplets.

22. A process for treating a hydrophilic textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid, the process comprising:

(a) providing a hydrophilic textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or blends thereof;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material entrained in the treatment bath fluid to deliver the treatment material to the textile substrate and thereby treat the textile substrate with the treatment material dissolved or suspended in the transport material.

23. The process of claim 22, wherein the hydrophilic fiber comprises a cellulosic fiber, a silk fiber, a wool fiber or blends thereof.

24. The process of claim 23, wherein the cellulosic fiber is a cotton fiber.

25. The process of claim 22, wherein the transport material comprises water.

26. The process of claim 22, wherein the transport material is present in a trace amount.

27. The process of claim 22, wherein the treatment material comprises a dye, a bleach, an optical brightener, a softener, an anti-static agent, a lubricant, a scouring agent, a sizing agent, an ultraviolet stabilizing agent, an antimicrobial agent, or blends thereof.

28. The process of claim 22, wherein the treatment bath fluid is free of a surfactant that is soluble in the treatment bath fluid.

29. The process of claim 22, further comprising drying the textile substrate by removing the transport material from the textile substrate.

30. The process of claim 29, wherein the step of drying the textile substrate further comprises circulating the treatment bath fluid through the textile substrate to re-entrain the transport material in the treatment bath fluid, thereby removing transport material from the textile substrate.

41. The process of claim 22, wherein the transport material is entrained in the treatment bath fluid in droplets.

31. A process for treating a hydrophobic textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid, the process comprising:

(a) providing a hydrophobic textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combinations thereof;

(c) entwining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the hydrophobic textile substrate with the transport material entrained in the treatment bath fluid to deliver the treatment material to the textile substrate and thereby treat the textile substrate with the treatment material dissolved or suspended in the transport material.

32. The process of claim 31, wherein the transport material comprises water.

33. The process of claim 31, wherein the treatment material comprises a dye, a bleach, an optical brightener, a softener, an anti-static agent, a lubricant, a scouring agent, a sizing agent, an ultraviolet stabilizing agent, an antimicrobial agent, or combinations thereof.

34. The process of claim 31, wherein the treatment bath fluid is free of a surfactant that is soluble in the treatment bath fluid.

35. The process of claim 31, further comprising drying the textile substrate by removing the transport material from the textile substrate.

36. The process of claim 35, wherein the step of dying the textile substrate further comprises circulating the treatment bath fluid through the textile substrate to re-entrain the transport material in the treatment bath fluid, thereby removing transport material from the textile substrate.

43. The process of claim 31, wherein the transport material is entrained in the treatment bath fluid in droplets.

38. A process for treating a textile substrate, the process comprising:

(a) providing a textile substrate;

(b) providing a treatment bath fluid;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material in the treatment bath fluid to thereby treat the textile substrate with the treatment material in the transport material, wherein the transport material is entrained in the treatment bath fluid in droplets by one of atomizing and sparging.

40. A process for treating a textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid, the process comprising:

(a) providing a textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combinations thereof;

(c) entraining a transport material in the treatment barn fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material in the treatment bath fluid to thereby treat the textile substrate with the treatment material dissolved or suspended in the transport material, wherein the transport material is entrained in the treatment bath fluid in droplets by one of atomizing and sparging.

42. A process for treating a hydrophobic textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid, the process comprising:

(a) providing a hydrophobic textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combinations thereof;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the textile substrate with the transport material in the treatment bath fluid to thereby treat the textile substrate with the treatment material dissolved or susoended in the transDort material, wherein the transport material is entrained in the treatment bath fluid in droplets by one of atomizing and sparging.

44. A process for treating a hydrophobic textile substrate in a near critical liquid or supercritical fluid carbon dioxide treatment bath fluid, the process comprising:

(a) providing a hydrophobic textile substrate;

(b) providing a treatment bath fluid comprising near critical liquid carbon dioxide, supercritical fluid carbon dioxide or combinations thereof;

(c) entraining a transport material in the treatment bath fluid wherein the transport material further comprises a treatment material dissolved or suspended therein and wherein the transport material is substantially immiscible with the treatment bath fluid; and

(d) contacting the hydrophobic textile substrate with the transport material in the treatment bath fluid to thereby treat the textile substrate with the treatment material dissolved or suspended in the transport material, wherein the transport material is entrained in the treatment bath fluid in droplets by one of atomizing and sparging.