ELECTRONIC SMOKING ARTICLE WITH IMPROVED STORAGE AND TRANSPORT OF AEROSOL PRECURSOR COMPOSITIONS

• US 20140261487A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Abandoned Application

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: R J Reynolds Tobacco Company (R. J. Reynolds Tobacco)
• Inventors: Chapman, Paul Stuart, Pu, Yan, Nestor, Timothy Brian, Novak, Charles Jacob III, Dooly, Grady Lance, Nielsen, Steven Floyd, Thomas, Bryan Peter, Billings, Alan Curtis
• Application Number:
  US13/802,950
• Publication Number:
  US 20140261487A1
• Time in Patent Office: Days
• US Class Current: 131/328
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/42 Cartridges or containers for inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/70 Manufacture
• CPC Class Codes: D04C 1/06 Braid or lace serving particular purposes

Abstract

The present disclosure relates to reservoirs for storing products in electronic smoking articles. The reservoir is manufactured from cellulose acetate fiber, thermoplastic fiber, non-thermoplastic fiber, or a combination thereof. The reservoir is substantially tubular in shape and is adapted to accommodate internal components of the smoking article thereby increasing reservoir capacity. The internal components particularly can comprise an atomizer, which may include a braided wick.

Claims

1. An electronic smoking article comprising:

an electrical power source; and

a reservoir that comprises cellulose acetate and is configured to hold an aerosol precursor material.

2. The electronic smoking article of claim 1, wherein the reservoir is substantially shaped as a cylinder having a hollow interior portion.

3. The electronic smoking article of claim 2, wherein at least part of the hollow interior is shaped and dimensioned to accommodate one or more further components of the smoking article.

4. The electronic smoking article of claim 3, wherein the one or more further components is an atomizer.

5. The electronic smoking article of claim 4, wherein the atomizer comprises a heater.

6. The electronic smoking article of claim 5, wherein the heater is a resistive heating element.

7. The electronic smoking article of claim 4, wherein the atomizer comprises a liquid transport element.

8. The electronic smoking article of claim 7, wherein the liquid transport element is a continuous, elongated article adapted for wicking a liquid.

9. The electronic smoking article of claim 7, wherein the liquid transport element comprises a braided wick.

10. The electronic smoking article of claim 9, wherein the liquid transport element is in the form of a sheath/core wick.

11. The electronic smoking article of claim 10, wherein the sheath portion of the wick is braided.

12. The electronic smoking article of claim 11, wherein the core portion of the wick is non-braided or is formed of a different material than the braided sheath, or both.

13. The electronic smoking article of claim 9, wherein the braided wick is a braid of at least 4 separate fibers or yarns.

14. The electronic smoking article of claim 7, wherein the liquid transport element comprises fiberglass.

15. The electronic smoking article of claim 14, wherein the fiberglass is C-glass.

16. The electronic smoking article of claim 4, wherein the atomizer comprises electrically conducting terminals.

17. The electronic smoking article of claim 4, wherein the atomizer comprises:

a continuous, elongated wick having two opposing ends;

a heater in connection with the wick and positioned at about a midpoint thereof; and

electrically conducting terminals positioned in physical contact with the wick and in electrical connection with the heater.

18. The electronic smoking article of claim 3, wherein the hollow interior comprises a central cavity with diametrically opposed grooves extending into the reservoir.

19. The electronic smoking article of claim 18, wherein the grooves are adapted to mate with portions of an atomizer.

20. The electronic smoking article of claim 3, wherein the hollow interior comprises a wall that includes one or more indentations or protrusions formed therein.

21. The electronic smoking article of claim 1, wherein the cellulose acetate fiber has a linear mass density of about 0.5 dpf or greater.

22. The electronic smoking article of claim 21, wherein the cellulose acetate fiber has a linear mass density of about 0.5 dpf to about 20 dpf.

23. The electronic smoking article of claim 2, wherein the cylinder has a wall thickness of about 1 mm to about 4 mm.

24. The electronic smoking article of claim 1, wherein the reservoir comprises about 70% to about 99% by weight cellulose acetate and about 2% to about 25% by weight of a binder.

25. The electronic smoking article of claim 2, further comprising an atomizer positioned within the hollow interior portion of the reservoir.

26. The electronic smoking article of claim 25, wherein the atomizer comprises:

a continuous, elongated wick having two opposing ends;

a heater in connection with the wick and positioned at about a midpoint thereof; and

electrically conducting terminals positioned in physical contact with the wick and in electrical connection with the heater.

27. An electronic smoking article comprising:

a reservoir with a liquid aerosol precursor composition stored therein; and

a braided wick in fluid communication with the reservoir.

28. The electronic smoking article of claim 27, wherein the braided wick is a sheath/core wick.

29. The electronic smoking article of claim 28, wherein the braided wick is the sheath and surrounds the core.

30. The electronic smoking article of claim 29, wherein the core is non-braided or is formed of a different material than the braided sheath, or both.

31. The electronic smoking article of claim 29, wherein the core comprises a twisted yarn.

32. The electronic smoking article of claim 27, wherein the braided wick is a braid of at least 4 separate fibers or yarns.

33. The electronic smoking article of claim 27, wherein the braided wick comprises fiberglass.

34. The electronic smoking article of claim 32, wherein the fiberglass is C-glass.

35. The electronic smoking article of claim 32, wherein the fiberglass is E-glass.

36. The electronic smoking article of claim 27, wherein the reservoir comprises cellulose acetate.

37. The electronic smoking article of claim 36, wherein the reservoir is substantially shaped as a cylinder having a hollow interior portion.

38. The electronic smoking article of claim 36, wherein the cylinder has a wall thickness of about 1 mm to about 3 mm.

39. The electronic smoking article of claim 36, wherein the cellulose acetate fiber has a linear mass density of about 0.5 dpf or greater.

40. The electronic smoking article of claim 29, wherein the cellulose acetate fiber has a linear mass density of about 0.5 dpf to about 20 dpf.

41. The electronic smoking article of claim 36, wherein the reservoir comprises about 70% to about 99% by weight cellulose acetate and about 2% to about 25% by weight of a binder.

42. A cartridge for an electronic smoking article, the cartridge comprising an atomizer at least partially positioned within a hollow interior of a tube-shaped reservoir adapted for holding an aerosol precursor composition, the reservoir tube being positioned within a hollow shell, wherein the reservoir tube is formed of cellulose acetate.

43. The cartridge of claim 42, wherein the atomizer comprises:

a continuous, elongated wick having two opposing ends;

a heater in connection with the wick and positioned at about a midpoint thereof; and

electrically conducting terminals positioned in physical contact with the wick and in electrical connection with the heater.

44. The cartridge of claim 43, wherein the hollow shell comprises a first end adapted to engage a control component and an opposing mouthend, and wherein the heater of the atomizer extends out of the reservoir tube in a cavity formed at the mouthend of the hollow shell.

45. The cartridge of claim 43, wherein the wick is a braided wick.

46. The cartridge of claim 45, wherein the braided wick is a sheath/core wick.

47. The cartridge of claim 46, wherein the braided wick is the sheath and surrounds the core.

48. The cartridge of claim 47, wherein the core is non-braided or is formed of a different material than the braided sheath, or both.

49. The cartridge of claim 45, wherein the braided wick is a braid of at least 4 separate fibers or yarns.

50. The cartridge of claim 44, wherein the wick comprises fiberglass.

51. The cartridge of claim 50, wherein the fiberglass is C-glass.

52. A method of making an electronic smoking article, the method comprising:

providing a cylinder comprising cellulose acetate and having a hollow interior portion; and

inserting an atomizer into the hollow interior of the cellulose acetate cylinder.

53. The method of claim 52, further comprising:

inserting the cylinder and atomizer into a hollow shell; and

connecting the atomizer to a power source.

54. The method of claim 53, wherein the power source is a battery.

55. The method of claim 53, wherein the atomizer comprises a continuous, elongated wick having two opposing ends and a heater in connection with the wick and positioned at about a midpoint thereof.

56. The method of claim 55, wherein the atomizer further comprises electrically conducting terminals positioned in physical contact with the wick and in electrical connection with the heater.

57. The method of claim 53, wherein said inserting comprises extending a portion of the atomizer beyond an end of the cellulose acetate cylinder.

58. A wick suitable for use in an electronic smoking article, the wick comprising a braid of at least 4 separate fibers or yarns, at least one of which is C-glass or E-glass.

59. The wick of claim 58, wherein the wick comprises a braid of at least 8 separate fibers or yarns.

60. The wick of claim 58, wherein the braided wick is a sheath/core wick.

61. The wick of claim 60, wherein the braided wick is the sheath and surrounds the core.

62. The wick of claim 60, wherein the core is non-braided or is formed of a different material than the braided sheath, or both.

63. The wick of claim 60, wherein the core comprises a twisted yarn.