WO1994006313B1 - Tobacco flavor unit for electrical smoking articles - Google Patents

Tobacco flavor unit for electrical smoking articles

Info

Publication number
WO1994006313B1
WO1994006313B1 PCT/US1993/008453 US9308453W WO9406313B1 WO 1994006313 B1 WO1994006313 B1 WO 1994006313B1 US 9308453 W US9308453 W US 9308453W WO 9406313 B1 WO9406313 B1 WO 9406313B1
Authority
WO
WIPO (PCT)
Prior art keywords
tobacco flavor
mat
smoking article
tobacco
carbon
Prior art date
Application number
PCT/US1993/008453
Other languages
French (fr)
Other versions
WO1994006313A1 (en
Filing date
Publication date
Priority claimed from US07/943,747 external-priority patent/US5369723A/en
Application filed filed Critical
Priority to KR1019940701577A priority Critical patent/KR100341602B1/en
Priority to CA002123212A priority patent/CA2123212C/en
Priority to DE69327038T priority patent/DE69327038T2/en
Priority to AU51261/93A priority patent/AU678562B2/en
Priority to EP93922159A priority patent/EP0612221B1/en
Priority to JP50814794A priority patent/JP3566721B2/en
Publication of WO1994006313A1 publication Critical patent/WO1994006313A1/en
Priority to NO941760A priority patent/NO300871B1/en
Publication of WO1994006313B1 publication Critical patent/WO1994006313B1/en

Links

Abstract

A flavor generating unit (10) is provided for use in an article for delivering to a consumer a flavor-containing substance, the article having electrical heating means (12) disposed in a cavity. The flavor generating unit (10) includes a carbon fibrous mat (16) and flavor generating medium (14) disposed on the mat (16) for providing efficient generation of flavor-containing substance. The carbon mat (16) includes carbon fibers that are made from a precursor selected from the group consisting of rayon, pitch, and polyacrylonitrile. A flavor generating article incorporating the flavor generating unit is also provided.

Claims

AMENDED CLAIMS[received by the International Bureau on 12 April 1994 (12.04.94); original claims 1-85 replaced by amended claims 1-75 (13 pages)]
1. A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having an electrical heater, the tobacco flavor unit comprising: a carbon fibrous mat comprising carbon fibers at a basis weight of less than or equal to 12 g/m2, the carbon fibers incorporated into a host matrix, the mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means; and tobacco flavor medium disposed on the first surface of the mat; wherein when the electrical heater is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the heater is heated, generating a predetermined quantity of tobacco flavor substance for delivery -to the smoker.
2. The tobacco flavor unit of claim 1 wherein the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch and polyacrylonitrile.
3. The tobacco flavor unit of claim 2 wherein the carbon fibers comprise over 90% by weight carbon.
4. The tobacco flavor unit of claim 3 wherein: the carbon fibrous mat is nonwoven; and the carbon fibrous mat further includes a binder for bonding together the fibers.
5. The tobacco flavor unit of claim 4 wherein: the binder is selected from the group consisting of polyvinyl alcohol, sugars, starches, modified starches, alginates, cellulose- based adhesives, artificial gums and natural gum; and the binder is suitable for use in a smoking article.
6. The tobacco flavor unit of claim 5 wherein the binder is pectin.
7. The tobacco flavor unit of claim 5 wherein the binder is konjac flour.
8. The tobacco flavor unit of claim 3 wherein the carbon fibers are woven together to form a woven mat.
9. The tobacco flavor unit of claim 1 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and second surface, the first sheet surface being in intimate thermal contact with the first surface of the mat; and the second surface of the mat is adapted to be in intimate physical contact with the electrical heating means.
10. The tobacco flavor unit of claim 9 wherein the second sheet surface is patterned so as to increase its effective surface area.
11. The tobacco flavor unit of claim 10 wherein the second sheet surface is embossed.
12. The tobacco flavor unit of claim 10 wherein the second sheet surface is screen printed.
13. The tobacco flavor unit of claim 9 wherein the tobacco flavor material is perforated to increase its porosity.
14. The tobacco flavor unit of claim 1 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and second surface, the first sheet surface disposed on the first surface of the mat and second sheet surface adapted to be in intimate physical contact with the electrical heating means.
15. A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising: a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means; and tobacco flavor medium disposed on the first surface of the mat; wherein, when the electrical heating means is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker; wherein the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch, and polyacrylonitrile; the carbon fibers comprise over 90% by weight carbon; the carbon fibrous mat is nonwoven; the carbon fibrous mat further includes a binder for binding together the fibers; the binder is selected from the group consisting of polyvinyl alcohol, sugars, starches, modified starches, alginates, cellulose-based adhesives, artificial gums and natural gum; the binder is suitable for use in a smoking article; and wherein the carbon fibers in the mat have a basis weight in the range from about 6 g/m2 to about 12 g/m2.
16. The tobacco flavor unit of claim 15 wherein the mat has a thickness in the range from about 0.05 mm to about 0.11 mm.
17. The tobacco flavor unit of claim 16 wherein the carbon fibers have diameters substantially in the range from about 7 μm to about 30 μm.
18. A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising: a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means; and tobacco flavor medium disposed on the first surface of the mat; wherein, when the electrical heating means is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker; and wherein the carbon fibers are incorporated into a host matrix.
19. The tobacco flavor unit of claim 18 wherein the carbon fibers comprise about 20% to about 90% by weight of the total basis weight of the carbon fibrous mat.
20. The tobacco flavor unit of claim 19 wherein the host matrix is a cellulose-based matrix.
21. The tobacco flavor unit of claim 20 wherein the cellulose-based matrix is a tobacco-based matrix.
22. The tobacco flavor unit of claim 18 wherein the fibrous mat further comprises a binder.
23. The tobacco flavor unit of claim 18 wherein the tobacco flavor medium comprises a slurry deposited on the mat.
24. The tobacco flavor unit of claim 23 wherein the tobacco flavor medium further comprises a second slurry deposited on top of the first slurry.
25. The tobacco flavor unit of claim 23 wherein the tobacco flavor medium further comprises tobacco grinds on the surface of the slurry, the tobacco grinds increasing the effective surface area of the tobacco flavor material.
26. The tobacco flavor unit of claim 25 wherein at least some of the grinds are embedded into the deposited slurry.
27. The tobacco flavor unit of claim 26 wherein the tobacco flavor medium further comprises an added binder adhering the tobacco grinds to the slurry.
28. A smoking article for delivering to a smoker a tobacco flavor substance, the article comprising: a plurality of electrical heaters; a source of electrical energy for powering the plurality of heaters; control means for applying the electrical energy to the heaters to selectively heat at least one of the plurality of heaters; and a tobacco flavor unit comprising: a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the plurality of electrical heaters; and tobacco flavor medium disposed on the first surface of the mat; wherein, when any one of the plurality of electrical heaters is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the one of the heaters is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker; the carbon fibrous mat comprises a mat of carbon fibers made 52
from a precursor selected from the group consisting of rayon, pitch, and polyacrylonitrile; wherein the carbon fibers comprise over 90% by weight carbon; wherein the carbon fibrous mat is nonwoven; and the carbon fibrous mat further includes a binder for bonding together the fibers; wherein the binder is selected from the group consisting of polyvinyl alcohol, sugars, starches, modified starches, alginates, cellulose- based adhesives, artificial gums, and natural gums; the binder is suitable for use in a smoking article; and wherein the carbon fibers in the mat have a basis weight in the range from about 6 g/m2 to about 12 g/m2.
29. The smoking article of claim 28 wherein the mat has a thickness in the range from about 0.05 mm to about 0.11 mm.
30. The smoking article of claim 28 wherein the carbon fibers have diameters substantially in the range from about 7 m to about 30 μm.
31. The smoking article of claim 28 wherein the binder is pectin.
32. The smoking article of claim 28 wherein the binder is konjac flour.
33. The smoking article of claim 28 wherein the carbon fibers are incorporated into a host matrix.
34. The smoking article of claim 33 wherein the carbon fibers comprise about 20% to about 90% by weight of the total basis weight of the carbon fibrous mat. 53
35. The smoking article of claim 34 wherein the host matrix is a cellulose-based matrix.
36. The smoking article of claim 35 wherein the cellulose- based matrix is a tobacco-based matrix.
37. The smoking article of claim 33 wherein the carbon fibrous mat further comprises a binder.
38. The smoking article of claim 28 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and second surface, the first sheet surface being in intimate thermal contact with the first surface of the mat; and the second surface of the mat is adapted to be in intimate physical contact with the electrical heating means.
39. The smoking article of claim 38 wherein the second sheet surface is patterned so as to increase its effective surface area.
40. The smoking article of claim 39 wherein the second sheet surface is embossed.
41. The smoking article of claim 39 wherein the second sheet surface is screen printed.
42. The smoking article of claim 38 wherein the tobacco flavor material is perforated to increase its porosity.
43. The smoking article of claim 28 wherein the tobacco flavor medium comprises a slurry deposited on the mat.
44. The smoking article of claim 43 wherein the tobacco flavor medium further comprises a second slurry deposited on top of the first slurry.
45. The smoking article of claim 43 wherein the tobacco flavor medium further comprises tobacco grinds on the surface of the slurry, the tobacco grinds increasing the effective surface area of the tobacco flavor material.
46. The smoking article of claim 45 wherein at least some of the grinds are embedded into the slurry.
47. The smoking article of claim 46 wherein the tobacco flavor medium further comprises an added binder adhering the tobacco grinds to the slurry.
48. The smoking article of claim 28 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and a second surface, the first sheet surface disposed on the first surface of the mat and the second sheet surface adapted to be in intimate physical contact with the electrical heating means.
49. The smoking article of claim 28 wherein each of the plurality of electrical heaters has a first surface and second surface and wherein the first surface of each heater is adapted to be in intimate physical contact the tobacco flavor unit.
50. The smoking article of claim 49 wherein the second surface of each heater is adapted to be substantially surrounded by a thermal insulation layer so as to reduce heat transfer in a direction away from the tobacco flavor medium.
51. The smoking article of claim 50 wherein the mat has a thickness in the range from about 0.05 mm to about 0.11 mm.
52. The smoking article of claim 50 wherein the carbon fibers have diameters substantially in the range from about 7 μm to about 30 μm.
53. The smoking article of claim 50 wherein the binder is pectin.
54. The smoking article of claim 50 wherein the binder is konjac flour.
55. The smoking article of claim 54 wherein the carbon fibers are incorporated into a host matrix.
56. The smoking article of claim 55 wherein the carbon fibers comprise about 20% to about 90% by weight of the total basis weight of the carbon fibrous mat.
57. The smoking article of claim 55 wherein the host matrix is a cellulose-based matrix.
58. The smoking article of claim 57 wherein the cellulose- based matrix is a tobacco-based matrix.
59. The smoking article of claim 50 wherein the carbon fibrous mat further comprises a binder.
60. The smoking article of claim 50 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and second surface, the first sheet surface being in intimate thermal contact with the first surface of the mat; and the second surface of the mat is adapted to be in intimate physical contact with the electrical heating means.
61. The smoking article of claim 50 wherein the second sheet surface is patterned so as to increase its effective surface area.
62. The smoking article of claim 60 wherein the second sheet surface is embossed.
63. The smoking article of claim 60 wherein the second sheet surface is screen printed.
64. The smoking article of claim 60 wherein the tobacco flavor material is perforated to increase its porosity.
65. The smoking article of claim 64 wherein the tobacco flavor medium comprises a slurry deposited on the mat.
66. The smoking article of claim 65 wherein the tobacco flavor medium further comprises a second slurry deposited on top of the first slurry.
67. The smoking article of claim 65 wherein the tobacco flavor medium further comprises tobacco grinds on the surface of the slurry, the tobacco grinds increasing the effective surface area of the tobacco flavor material.
68. The smoking article of claim 67 wherein at least some of the grinds are embedded into the deposited slurry.
69. The smoking article of claim 67 wherein the tobacco flavor medium further comprises an added binder adhering the tobacco grinds to the slurry.
70. The smoking article of claim 28 wherein: the tobacco flavor medium comprises a sheet of tobacco flavor material having a first surface and second surface, the first 57
sheet surface disposed on the first surface of the mat and the second sheet surface adapted to be in intimate physical contact with the electrical heating means.
71. A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the smoking article having electrical heating means disposed in a cavity, the tobacco flavor unit comprising: a fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means, wherein the mat comprises a mat of inorganic, thermally stable fibers which are incorporated into a host matrix; and tobacco flavor medium disposed on the first surface of the mat; wherein when the electrical heating means is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker.
72. The tobacco flavor unit of claim 71 wherein the inorganic fibers comprise metallic fibers.
73. A tobacco product adapted to cooperate with a discrete source of heat, the tobacco product comprising a fibrous carbon mat having a basis weight less than or equal to about 12 g/m2 and a tobacco flavor material disposed along a first surface of the fibrous carbon mat, an opposite surface of the fibrous carbon mat being substantially free of tobacco flavor material, and the fibrous carbon mat being adapted to receive heat at at least one location along the opposite surface and to transfer a substantial portion of the heat to portions of the tobacco flavor material proximate to the location.
74. A tobacco flavor unit for use in a smoking article for delivering to a smoker a tobacco flavor substance, the article having 58
electrical heating means disposed in a cavity, the tobacco flavor unit comprising: a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the electrical heating means; tobacco flavor medium disposed on the first surface of the mat; wherein, when the electrical heating means is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the heating means is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker; wherein the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch, and polyacrylonitrile; the carbon fibers comprise over 90% by weight carbon; the carbon fibers are woven together to form a woven mat; and wherein the carbon fibers in the mat have a basis weight less than or equal to about 12 g/m2.
75. A smoking article for delivering to a smoker a tobacco flavor substance, the article comprising: a plurality of electrical heaters; a source of electrical energy for powering the plurality of heaters; control means for applying the electrical energy to the heaters to selectively heat at least one of the plurality of heaters; and a tobacco flavor unit comprising: a carbon fibrous mat having a first surface and a second surface, the mat adapted to be disposed in a region adjacent the plurality of electrical heaters; tobacco flavor medium disposed on the first surface of the mat; wherein, when any one of the plurality of electrical heaters is activated, a respective fraction of the tobacco flavor medium in thermal transfer relationship with the one of the heaters is heated, generating a predetermined quantity of tobacco flavor substance for delivery to the smoker; the carbon fibrous mat comprises a mat of carbon fibers made from a precursor selected from the group consisting of rayon, pitch, and polyacrylonitrile; wherein the carbon fibers comprise over 90% by weight carbon; wherein the carbon fibers are woven together to form a woven mat; and wherein the carbon fibers in the mat have a basis weight less than or equal to about 12 g/m2.
PCT/US1993/008453 1992-09-11 1993-09-10 Tobacco flavor unit for electrical smoking articles WO1994006313A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR1019940701577A KR100341602B1 (en) 1992-09-11 1993-09-10 Cigarette Tobacco Unit for Electric Smoking Equipment
CA002123212A CA2123212C (en) 1992-09-11 1993-09-10 Tobacco flavor unit for electrical smoking articles
DE69327038T DE69327038T2 (en) 1992-09-11 1993-09-10 TOBACCO TASTE UNIT FOR ELECTRIC SMOKING ITEMS
AU51261/93A AU678562B2 (en) 1992-09-11 1993-09-10 Tobacco flavor unit for electrical smoking articles
EP93922159A EP0612221B1 (en) 1992-09-11 1993-09-10 Tobacco flavor unit for electrical smoking articles
JP50814794A JP3566721B2 (en) 1992-09-11 1993-09-10 Tobacco flavor device for electric smoking articles
NO941760A NO300871B1 (en) 1992-09-11 1994-05-10 Tobacco aroma unit for electric smoking items

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/943,747 US5369723A (en) 1992-09-11 1992-09-11 Tobacco flavor unit for electrical smoking article comprising fibrous mat
US943,747 1992-09-11

Publications (2)

Publication Number Publication Date
WO1994006313A1 WO1994006313A1 (en) 1994-03-31
WO1994006313B1 true WO1994006313B1 (en) 1994-05-26

Family

ID=25480195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/008453 WO1994006313A1 (en) 1992-09-11 1993-09-10 Tobacco flavor unit for electrical smoking articles

Country Status (10)

Country Link
US (1) US5369723A (en)
EP (1) EP0612221B1 (en)
JP (1) JP3566721B2 (en)
KR (1) KR100341602B1 (en)
AT (1) ATE186628T1 (en)
AU (1) AU678562B2 (en)
CA (2) CA2123212C (en)
DE (1) DE69327038T2 (en)
NO (1) NO300871B1 (en)
WO (1) WO1994006313A1 (en)

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