AEROSOL GENERATING SUBSTRATE ELEMENT WITH DUAL PAPER WRAPPERS

Abstract

An aerosol generating substrate element is circumscribed by exactly two paper layers that do not extend beyond an aerosol generating substrate. The aerosol generating substrate includes from about 10% to about 30% glycerine by weight. The first paper wrapper and the second paper wrapper have a combined thickness in a range from about 60 micrometres to about 200 micrometres. The first paper wrapper does not overlap itself and a second paper wrapper does not overlap itself.

Claims

1-15. (canceled)

16. An aerosol generating substrate element comprising: a cylindrical aerosol generating substrate comprising from about 10% to about 30% glycerine by weight; a first paper wrapper comprises opposing edges that abut each other to circumscribe the aerosol forming substrate and form a first seam line; a second paper wrapper comprises opposing edges that abut each other to circumscribe the first paper wrapper and form a second seam line; and the first seam line is offset from the second seam line and the first paper wrapper and the second paper wrapper do not extend beyond the aerosol generating substrate.

17. The aerosol generating substrate element according to claim 16, wherein the first seam line is offset from the second seam line by at least about 5% of a circumference of the aerosol generating substrate.

18. The aerosol generating substrate element according to claim 16, wherein the aerosol generating substrate is circumscribed by less than three paper layers at any point around a circumference of the aerosol generating substrate that do not extend beyond the aerosol generating substrate.

19. The aerosol generating substrate element according to claim 16, wherein the first paper wrapper and the second paper wrapper have a combined thickness in a range from about 60 micrometres to about 200 micrometres.

20. The aerosol generating substrate element according to claim 16, wherein the first paper wrapper and the second paper wrapper have a uniform combined thickness that does not differ at any point around a circumference of the aerosol generating substrate element by more than about 30 micrometres.

21. The aerosol generating substrate element according to claim 16, wherein the aerosol generating substrate has a diameter in a range from about 6.8 mm to about 7.1 mm.

22. The aerosol generating substrate element according to claim 16, wherein the least first paper wrapper and the second paper wrapper has a ratio of combined paper thickness to tobacco substrate diameter in a range from about 1:120 to about 1:40.

23. The aerosol generating substrate element according to claim 16, wherein the aerosol generating substrate comprises homogenized tobacco material.

24. The aerosol generating substrate element according to claim 23, wherein the homogenized tobacco material comprises tobacco material, from about 1 percent to about 5 percent of a binder, and from about 10 percent to about 30 percent glycerine, in dry weight basis.

25. The aerosol generating substrate element according to claim 16, wherein the aerosol generating substrate comprises a metallic induction heating element.

26. The aerosol generating substrate element according to claim 16, wherein the aerosol generating substrate comprises a plurality of metallic induction heating elements.

27. An aerosol generating system comprising: an aerosol generating article comprising the aerosol generating substrate element according to claim 16 joined to a filter element; and an aerosol generating device comprising a heating element configured to heat the aerosol generating substrate element.

28. The aerosol generating system according to claim 27, wherein the heating element is a resistive heating blade element configured to be inserted into the aerosol generating substrate element.

29. The aerosol generating system according to claim 27, wherein the heating element is in inductive heating element configured to inductively heat metallic induction heating elements embedded within the aerosol generating substrate element.

30. The aerosol generating substrate element according to claim 16, wherein the first paper wrapper and the second paper wrapper have a combined thickness in a range from about 78 micrometres to about 160 micrometres.

31. The aerosol generating substrate element according to claim 30, wherein the first paper wrapper and the second paper wrapper have a uniform combined thickness that does not differ at any point around a circumference of the aerosol generating substrate element by more than about 20 micrometres.

32. The aerosol generating substrate element according to claim 16, wherein the first paper wrapper and the second paper wrapper have a combined thickness in a range from about 100 micrometres to about 140 micrometres, and the first paper wrapper and the second paper wrapper have a uniform combined thickness that does not differ at any point around a circumference of the aerosol generating substrate element by more than about 10 micrometres.

33. The aerosol generating substrate element according to claim 31, wherein the first seam line is offset from the second seam line by at least about 10% of a circumference of the aerosol generating substrate.

34. The aerosol generating substrate element according to claim 31, wherein the least first paper wrapper and the second paper wrapper has a ratio of combined paper thickness to tobacco substrate diameter in a range from about 1:100 to about 1:50.

35. The aerosol generating substrate element according to claim 34, wherein the aerosol generating substrate comprises a plurality of metallic induction heating elements.

Description

[0092] FIG. 1 is a schematic cross-sectional diagram of an aerosol generating article.

[0093] FIG. 2 is a schematic cross-sectional diagram of the first paper wrapper and second paper wrapper prior to being wrapped about the aerosol generating substrate.

[0094] FIG. 3 is a schematic cross-sectional diagram of the aerosol generating substrate element along line 3-3 in FIG. 1.

[0095] FIG. 4 is a schematic cross-sectional diagram of the aerosol generating substrate element along line 4-4 in FIG. 3.

[0096] FIG. 5 is a schematic cross-sectional diagram of an aerosol generating system.

[0097] FIG. 6 is a schematic cross-sectional diagram a heating blade inserted into the aerosol generating substrate element.

[0098] The aerosol generating articles depicted in FIGS. 1-6 illustrate one or more examples of aerosol generating articles, components of aerosol generating articles, or aerosol generating systems described above. The schematic drawings are not necessarily to scale and are presented for purposes of illustration and not limitation. The drawings depict one or more aspects described in this disclosure. However, it will be understood that other aspects not depicted in the drawings fall within the scope and spirit of this disclosure.

[0099] The aerosol generating article 10, of FIG. 1, illustrates an aerosol generating substrate element 12 including an aerosol generating substrate 20 wrapped with dual paper wrapper 30. An intermediate section 24 separates a filter element 22 from the aerosol generating substrate element 12. The aerosol generating substrate element 12, intermediate section 24, and a filter element 22 are aligned from a distal end 13 to a proximal end 11 in serial order and form a cylinder. A tipping paper or tipping wrapper 40 circumscribes the aerosol generating article 10 to join the aerosol generating substrate element 12 to the intermediate section 24, and a filter element 22.

[0100] The intermediate section 24 may comprise on or more of, a hollow cellulose acetate tube or a polylactic acid filter segment. The filter element 22 may define a mouthpiece segment and be formed of cellulose acetate material. The aerosol generating substrate element 12, the intermediate section 24, and a filter element 22 may be individually wrapped with a paper layer and then joined to each other with the tipping paper or tipping wrapper 40. In particular, the aerosol generating substrate element 12 is wrapped with the dual paper wrapper 30, as described herein.

[0101] The aerosol generating article 10 has a mouth end or proximal end 11 and an upstream, distal end 13 located at the opposite end of the article to the mouth end 11. The aerosol generating article 10 shown in FIG. 1 is particularly suitable for use with an electrically operated aerosol generating device comprising a heater for heating the aerosol generating substrate element 12.

[0102] FIG. 2 is a schematic cross-sectional diagram of the first paper wrapper 31 and second paper wrapper 32 or dual paper wrapper 30, prior to being wrapped about the aerosol generating substrate 20. FIG. 3 is a schematic cross-sectional diagram of the aerosol generating substrate element 12 along line 3-3 in FIG. 1. FIG. 4 is a schematic cross-sectional diagram of the aerosol generating substrate element 12 along line 4-4 in FIG. 3.

[0103] A first paper wrapper 31 comprises opposing edges that abut each other to circumscribe the aerosol forming substrate 20 and form a first seam line 35. A second paper wrapper 32 comprises opposing edges that abut each other to circumscribe the first paper wrapper 31 and form a second seam line 34. The first seam line 35 is offset from the second seam line 34 and the first paper wrapper 31 and the second paper wrapper 32 do not extend beyond the aerosol generating substrate 20 or beyond the ends 25, 26 of the aerosol generating substrate 20.

[0104] The dual paper wrapper 30 circumscribes the aerosol generating substrate 20 to define the aerosol generating substrate element 12 with a substantially cylindrical shape. The aerosol generating substrate 20 defines a substantially cylindrical shape having a diameter 23 in a range from about 6.8 mm to about 7.1 mm, or from about 6.8 mm to about 7.0 mm. The aerosol generating substrate element 12 defines a substantially cylindrical shape having a diameter 33 in a range from about 7.1 mm to about 7.3 mm, or from about 7.15 mm to about 7.25 mm.

[0105] The dual paper wrapper 30 has a thickness T in a range from about 60 micrometers to about 200 micrometers. The dual paper wrapper 30 may preferably have a thickness in a range from about 78 micrometers to about 160 micrometers, or from about 78 micrometers to about 140 micrometers, or from about 90 micrometers to about 140 micrometers, or from about 100 micrometers to about 140 micrometers, or from about 110 micrometers to about 140 micrometers, or from about 125 micrometers to about 140 micrometers, or from about 130 micrometers to about 140 micrometers.

[0106] The dual paper wrapper 30 has a ratio of paper thickness T to tobacco substrate diameter 23 in a range from about 1:120 to about 1:40, or about 1:100 to about 1:50, or about 1:70 to about 1:50, or about 1:60 to about 1:50.

[0107] The dual paper wrapper 30 circumscribes the entire circumference of the aerosol generating substrate 20 without overlap of the first paper wrapper 31 onto itself and without overlay of the second paper wrapper 32 onto itself. The dual paper wrapper 30 defines less than three paper layers at any point about the circumference of the aerosol generating substrate element 12.

[0108] FIG. 5 is a schematic cross-sectional diagram of an aerosol generating system 201. FIG. 6 is a schematic cross-sectional diagram a heating blade 230 inserted into the aerosol generating substrate element 12. The aerosol generating article 10 may be used with the aerosol generating device 200 as illustrated in FIG. 5 and FIG. 6.

[0109] The aerosol generating device 200 includes a housing 210 defining the receptacle 220, which is configured to receive the aerosol generating article 10. The aerosol generating device 200 also includes a heating blade element 230 configured to pierce the aerosol generating substrate element 12 of the aerosol generating article 10. The heating blade element 230 may comprise an electrically resistive heating component. In addition, the device 200 includes a power supply 240 and control electronics 250 that cooperate to control heating of heating blade element 230.

[0110] The aerosol generating article 10 illustrates an aerosol-generating substrate element 12, an intermediate section 24, and a filter element 22 aligned from a distal end 13 to a proximal end 11 in serial order and form a cylinder. The distal end 13 of the aerosol generating article 10. The aerosol generating substrate 12 has a length of about 12 millimetres. The aerosol generating substrate 12 is cylindrical in shape and has a substantially circular cross-section. The aerosol generating substrate 12 may comprise a gathered sheet of homogenised tobacco material. The sheet of homogenised tobacco material may comprise about 10 percent by weight on a dry basis of glycerine. The intermediate section 24 may be a hollow cellulose acetate tube having a length of about 8 millimetres and a thickness of 1 millimetre. The mouthpiece segment or filter element 22 may comprises a plug of cellulose acetate tow of 8 denier per filament and has a length of about 7 millimetres.

[0111] FIG. 6 illustrates the heating blade element 230 disposed within the aerosol generating substrate 12. The heating blade element 230 may heat the aerosol generating substrate 12, 20 of the aerosol generating article 10. Heating of the aerosol generating substrate 12 causes the aerosol generating substrate 12 to generate an aerosol containing the nicotine which can transfer out of the aerosol generating article 10 at the proximal end 11.

[0112] The heating blade element 230 may have a width 233 of about 5 mm. The aerosol generating substrate 20 defines a substantially cylindrical shape having a diameter 23 in a range from about 6.8 mm to about 7.1 mm. The aerosol generating substrate element 12 defines a substantially cylindrical shape having a diameter 33 in a range from about 7.1 mm to about 7.3 mm. The heating blade element 230 may lie within about 1 mm from the dual paper wrapper 30.

[0113] In some examples the heating mechanism may be by induction where the heating element emits radio-magnetic radiation which is absorbed by one or more metallic induction heating elements when the aerosol generating article 10 is positioned in the receptacle 220 of the aerosol generating device 200.

[0114] Once the aerosol generating article 10 is releasably received in the aerosol generating device 200 and on the heating blade element 230, the aerosol generating device 200 is actuated to heat the aerosol generating substrate 12 to a temperature of approximately 375 degrees Celsius. As a user draws on the mouth end 11 of the aerosol generating article 10, the volatile compounds evolved from the aerosol generating substrate 12 are drawn downstream through the aerosol generating article 10 and condense to form an aerosol that is drawn through the mouthpiece 11 of the aerosol generating article 10 into the user's mouth.

[0115] The exemplary examples described above are not limiting. Other examples consistent with the exemplary examples described above will be apparent to those skilled in the art.