Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
  • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
  • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
  • A24F40/42—Cartridges or containers for inhalable precursors
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/20—Cigarettes specially adapted for simulated smoking devices
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B3/00—Preparing tobacco in the factory
  • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/02—Cigars; Cigarettes with special covers
  • A24D1/025—Cigars; Cigarettes with special covers the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
  • A24D1/042—Cigars; Cigarettes with mouthpieces or filter-tips with mouthpieces
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/17—Filters specially adapted for simulated smoking devices
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/18—Mouthpieces of cigars or cigarettes; Manufacture thereof
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
  • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
  • A24F40/20—Devices using solid inhalable precursors
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
  • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
  • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
  • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
  • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
  • A24F40/46—Shape or structure of electric heating means
  • A24F40/465—Shape or structure of electric heating means specially adapted for induction heating

Definitions

• the present invention relates to an aerosol-generating article comprising an aerosolgenerating substrate that is adapted to produce an inhalable aerosol upon heating.
• the present invention provides an aerosol-generating article having a novel aerosol-generating substrate, which is in the form of a hollow tubular substrate element.
• the hollow tubular substrate element is formed from a plurality of overlapping layers of homogenised tobacco material, which combine to form the peripheral wall of the hollow tubular substrate element.
• the “peripheral” wall of the hollow tubular substrate corresponds to the main wall defining the tubular structure.
• the hollow tubular substrate element consists of the peripheral wall only. The peripheral wall therefore contains all of the homogenised tobacco material that will generate an aerosol upon heating of the aerosol-generating substrate.
• the peripheral wall of the hollow tubular substrate element preferably has a porous structure as a result of the voids formed between overlapping layers of homogenised tobacco material.
• the peripheral wall is porous both transversally and longitudinally.
• the transverse cross-sectional porosity may be determined using a digital imaging process.
• An image of a transverse cross-section of the hollow tubular substrate may be obtained and a threshold may be applied to differentiate pixels that represent aerosol-forming substrate from pixels that represent void.
• the digital image acquisition may be done by any suitable method, for example by using digital cameras or computer tomography.
• the images may be represented by any suitable image format in full RGB (red-green-blue) colour, grey-scale, or binary (black and white) representations.
• the background in any image is uniform to facilitate the detection and removal of the background during image processing.
• the resolution of any image should be high enough to accurately resolve the morphology of the hollow tubular substrate.
• the peripheral wall of the hollow tubular substrate element has a density of at least about 200 milligrams per cubic centimetre, more preferably at least about 300 milligrams per cubic centimetre, more preferably at least about 400 milligrams per cubic centimetre, more preferably at least about 500 milligrams per cubic centimetre, more preferably at least about 600 milligrams per cubic centimetre, more preferably at least about 700 milligrams per cubic centimetre, more preferably at least about 800 milligrams per cubic centimetre,.
• the peripheral wall of the hollow tubular substrate element has a density of less than about 1 gram per cubic centimetre.
• the hollow tubular substrate element may have a length of between about 10 millimetres and about 40 millimetres, or between about 12 millimetres and about 37 millimetres, or between about 15 millimetres and about 35 millimetres.
• the ratio of the length of the hollow tubular substrate element to the overall length of the aerosol-generating article is up to about 0.6. More preferably, the ratio of the length of the hollow tubular substrate element to the overall length of the aerosol-generating article is up to about 0.55. More preferably, the ratio of the length of the hollow tubular substrate element to the overall length of the aerosol-generating article is up to about 0.5.
• the longitudinal airflow channel has a diameter of up to about 7 millimetres, more preferably up to about 6 millimetres, more preferably up to about 5.5 millimetres.
• the overlapping layers of homogenised tobacco material may be arranged in any suitable way in order to provide the desired wall thickness and porosity for the peripheral wall.
• Each layer of homogenised tobacco material will typically extend around the hollow tubular substrate element at least once and preferably, each layer of homogenised tobacco material extends around the hollow tubular substrate element a plurality of times to build up the structure of the peripheral wall.
• the plurality of layers of homogenised tobacco material are helically wound about the longitudinal axis of the hollow tubular substrate element.
• This provides a spiral wound structure that is similar to that the layered structure of conventional paper straws.
• Hollow tubular substrate elements incorporating a helical arrangement of layers for use in the present invention can be manufactured using existing straw making apparatus, such as the Hauni Straw Maker (HSM) from Hauni Maschinenbau GmbH.
• HSM Hauni Straw Maker
• the aerosol-generating substrate may further comprise a sealing element at the upstream end of the hollow tubular substrate element which covers the upstream end of the hollow tubular substrate element.
• the open upstream end of the hollow tubular substrate element is therefore covered and sealed closed by the sealing element, so that air cannot be drawn into the longitudinal airflow channel.
• the sealing element therefore needs to be adapted so that it can be removed or pierced prior to use, in order to open the upstream end of the hollow tubular substrate element and also air to enter the longitudinal airflow channel.
• the hollow tubular substrate element may be overwrapped with at least one wrapper.
• the hollow tubular substrate element may be overwrapped with a conventional paper wrapper.
• the hollow tubular substrate element may be overwrapped with a tobacco containing wrapper, such as a tobacco paper wrapper.
• the homogenised tobacco material comprises tobacco particles.
• Sheets of homogenised tobacco material for use in the invention may have a tobacco content of at least about 40 percent by weight on a dry weight basis, more preferably of at least about 50 percent by weight on a dry weight basis more preferably at least about 70 percent by weight on a dry weight basis and most preferably at least about 90 percent by weight on a dry weight basis.
• tobacco particles describes particles of any plant member of the genus Nicotiana.
• tobacco particles encompasses ground or powdered tobacco leaf lamina, ground or powdered tobacco leaf stems, tobacco dust, tobacco fines, and other particulate tobacco by-products formed during the treating, handling and shipping of tobacco.
• the tobacco particles are substantially all derived from tobacco leaf lamina.
• isolated nicotine and nicotine salts are compounds derived from tobacco but are not considered tobacco particles for purposes of the invention and are not included in the percentage of particulate plant material.
• the plurality of layers of homogenised tobacco material may include one or more layers of cigarillo paper.
• the susceptor element preferably comprises more than about 5 percent, preferably more than about 20 percent, more preferably more than about 50 percent or more than about 90 percent of ferromagnetic or paramagnetic materials. Some elongate susceptor elements may be heated to a temperature in excess of about 250 degrees Celsius.
• the aerosolgenerating substrate formed of the hollow tubular substrate element is combined with a downstream section, located downstream of the aerosol-generating substrate.
• the downstream section is preferably located immediately downstream of the aerosol-generating substrate.
• the downstream section of the aerosol-generating article preferably extends between the aerosolgenerating substrate and the downstream end of the aerosol-generating article.
• the downstream section may comprise one or more elements, each of which will be described in more detail within the present disclosure.
• the length of the hollow tubular element of the downstream section may be between about 12 mm and 50 mm.
• the length of the hollow tubular element may be between about 15 mm and 45 mm.
• the length of the hollow tubular element may be between about 20 mm and 40 mm.
• the length of the hollow tubular element may be about 30 mm.
• the ratio between the length of the hollow tubular element of the downstream section and the overall length of the aerosol-generating article may be between about 0.25 and about 0.8, or between about 0.3 and about 0.7, or between about 0.4 and about 0.6.
• the hollow tubular element of the downstream section may comprise a paper-based material.
• the hollow tubular element may comprise at least one layer of paper.
• the paper may be very rigid paper.
• the paper may be crimped paper, such as crimped heat resistant paper or crimped parchment paper.
• the hollow tubular element comprises cellulose acetate tow
• the cellulose acetate tow may have a denier per filament of between about 2 and about 4 and a total denier of between about 25 and about 40.
• a mouthpiece element at the downstream end of the aerosol-generating articles according to the present invention provides an appealing appearance and mouthfeel to the consumer.
• the length of the mouthpiece element may be at least about 1.5 mm.
• the length of the mouthpiece element may be at least about 2 mm.
• the length of the mouthpiece element may equal to or less than about 7 mm.
• the length of the mouthpiece element may be equal to or less than about 4 mm.
• the length of the mouthpiece element may be between about 1.5 mm and about 7 mm.
• the length of the mouthpiece element may be between about 2 millimetres and about 4 millimetres.
• the ratio between the length of the mouthpiece element and the length of the downstream section may be at least about 0.03.
• the ratio between a length of the mouthpiece element and the length of the downstream section may be at least about 0.05. More preferably, the ratio between the length of the mouthpiece element and the length of the downstream section may be at least about 0.1.
• the ratio between the length of the mouthpiece element and the length of the downstream section is from about 0.03 to about 0.35, preferably from about 0.05 to about 0.30, more preferably from about 0.1 to about 0.25.
• the ratio between the length of the mouthpiece element and the overall length of the aerosol-generating article may be at least about 0.01 .
• the ratio between the length of the mouthpiece element and the overall length of the aerosol-generating article may be at least about 0.02. More preferably, the ratio between the length of the mouthpiece element and the overall length of the aerosol-generating article may be at least about 0.05.
• the downstream section may have an overall length of between about 20 millimetres and about 50 millimetres, more preferably between about 25 millimetres and about 45 millimetres, more preferably between about 30 millimetres and about 40 millimetres.
• the ratio between the total length of the downstream section and an overall length of the aerosol-generating article may be less than or equal to about 0.80.
• the ratio between the length of the downstream section and an overall length of the aerosol-generating article may be less than or equal to about 0.75.
• the ratio between the length of the downstream section and the overall length of the aerosol-generating article may be less than or equal to about 0.70.
• the ratio between the length of the downstream section and the overall length of the aerosol-generating article may be less than or equal to about 0.65.
• one or more of the components of the aerosol-generating article are individually circumscribed by their own wrapper.
• the aerosol-generating articles according to the present invention as described herein are adapted for use in electrically-operated aerosol-generating systems in which the aerosol-generating substrate of the heated aerosol-generating article is heated by an electrical heat source.
• the electrically operated aerosol-generating system may in some cases comprise an aerosol-generating article as defined above, a source of aerosol former and a means to vaporise the aerosol former, preferably a heating element.
• the source of aerosol former can be a reservoir, which can be refillable or replaceable, that resides on the aerosol generating device. While the reservoir is physically separate from the aerosol generating article, the vapour that is generated is directed through the aerosol-generating article. The vapour makes contact with the aerosolgenerating substrate which releases volatile compounds, such as nicotine and flavorants in the particulate plant material, to form an aerosol.
• EX10 An aerosol-generating article according to any of the preceding examples, wherein the longitudinal tensile strength of the hollow tubular substrate element is between 11 kNewtons per metre and 14 kNewtons per metre.
• EX11 An aerosol-generating article according to any of the preceding examples, wherein the axial compressive strength of the hollow tubular substrate element is between 7 MPa and 9 MPa.
• EX12. An aerosol-generating article according to any of the preceding examples, wherein the radial compressive strength of the hollow tubular substrate element is between 7 MPa and 9 MPa.
• EX13 An aerosol-generating article according to any of the preceding examples, wherein the hollow tubular substrate element has a length of up to 40 millimetres.
• EX20 An aerosol-generating article according to any of the preceding examples, wherein the longitudinal airflow channel of the hollow tubular substrate element has a diameter of up to 7 millimetres.
• EX27 An aerosol-generating article according to any of the preceding examples, wherein the homogenised tobacco material has a tobacco content of at least 40 percent by weight on a dry weight basis.
• EX28 An aerosol-generating article according to any of the preceding examples, wherein the homogenised tobacco material further comprises one or more aerosol former.
• EX29 An aerosol-generating article according to example EX28, wherein the homogenised tobacco material has an aerosol former content of between 5 percent and 30 percent by weight on a dry weight basis.
• EX31 An aerosol-generating article according to example EX30, wherein the first and second homogenised tobacco materials have a different tobacco content to each other.
• EX33 An aerosol-generating article according to any of the preceding examples, wherein the plurality of layers of homogenised tobacco material includes one or more sheets of cast leaf.
• EX34 An aerosol-generating article according to example EX33, wherein the cast leaf has a porosity of between 20 percent and 60 percent.
• EX35 An aerosol-generating article according to any of the preceding examples, wherein the plurality of layers of homogenised tobacco material includes one or more layers of cigarillo paper.
• EX38 An aerosol-generating article according to example EX37, wherein the hollow tubular substrate element comprises one or more susceptor elements on a surface of the peripheral wall.
• EX41 An aerosol-generating article according to example EX40, wherein the length of the hollow tubular element of the downstream section is between 12 mm and 50 mm.
• EX44 An aerosol-generating article according to any of examples EX40 to EX43, wherein the ratio between the length of the hollow tubular element of the downstream section and the total length of the downstream section is at least 0.35.
• the aerosol-generating substrate 12 comprises a hollow tubular substrate element 40 formed from a plurality of layers of homogenised tobacco material that have been helically wound about the longitudinal axis of the hollow tubular substrate element.
• the layers of homogenised tobacco material include a plurality of layers of cast leaf, alternating with layers of cigarillo paper.
• the hollow tubular substrate element 40 has a peripheral wall 42 formed of the overlapping layers of homogenised tobacco material.
• the peripheral wall 42 defines a central, longitudinal airflow channel 44 that extends through the hollow tubular substrate element 40.
• the upstream end of the airflow channel 44 provides an air inlet through which air can be drawn into the aerosolgenerating article during use.
• the hollow tubular substrate element 40 is unwrapped, so that the layers of homogenised tobacco material are visible on the exterior surface of the aerosolgenerating article.
• the hollow tubular substrate element 40 does not substantially contribute to the overall RTD of the aerosol-generating article.
• the RTD of the hollow tubular substrate element 40 is therefore about 0 mm H2O.
• the hollow tubular element 20 is provided in the form of a hollow cylindrical tube made of cellulose acetate tow.
• the hollow tubular element 20 defines an internal cavity 22 that extends all the way from an upstream end of the hollow tubular element 20 to a downstream end of the hollow tubular element 20.
• the internal cavity 22 is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity 22.
• the hollow tubular element 20 does not substantially contribute to the overall RTD of the aerosol-generating article 10.
• the RTD of the hollow tubular element 20 is therefore about 0 mm H2O.
• FIG 2 illustrates an aerosol-generating system 100 comprising an aerosol-generating device 102 and an aerosol-generating article 110 according to a second embodiment of the invention.
• the aerosol-generating article 110 is similar to that shown in Figure 1 and described above, with a similar arrangement of components.
• the aerosol-generating article 110 additionally comprises a tubular susceptor element 160 within the longitudinal airflow channel 144 of the hollow tubular substrate element 140.
• the tubular susceptor element 160 is provided over the internal surface of the longitudinal airflow channel 144.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)
• Manufacture Of Tobacco Products (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=78828118

Family Applications (1)

Country Status (6)

Cited By (2)

Citations (12)

• 2022
  • 2022-12-05 US US18/713,791 patent/US20250024880A1/en active Pending
  • 2022-12-05 WO PCT/EP2022/084390 patent/WO2023104706A1/en not_active Ceased
  • 2022-12-05 JP JP2024532560A patent/JP2024542711A/ja active Pending
  • 2022-12-05 EP EP22823593.3A patent/EP4444118B1/en active Active
  • 2022-12-05 KR KR1020247021698A patent/KR20240114288A/ko active Pending
  • 2022-12-05 CN CN202280078967.4A patent/CN118317703A/zh active Pending

Patent Citations (12)

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