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EP-4586834-B1 - AN AEROSOL-GENERATING ARTICLE COMPRISING A HIGH WEIGHT RATIO OF AEROSOL-FORMING SUBSTRATE

EP4586834B1EP 4586834 B1EP4586834 B1EP 4586834B1EP-4586834-B1

Inventors

  • CAMPITELLI, Gennaro
  • CHASSOT, Bruno Christian Joseph

Dates

Publication Date
20260506
Application Date
20230912

Claims (13)

  1. An aerosol-generating article (100) comprising: an aerosol-forming substrate section (2) containing an aerosol-forming substrate (6); an upstream section (12) provided at an upstream end (8) of the aerosol-forming substrate section (2), the upstream section (12) comprising an upstream element (18); and a downstream section (4) provided at a downstream end (10) of the aerosol-forming substrate section (2), the downstream section (4) comprising: one or more hollow tubular elements (14, 22), wherein the aerosol-generating article (100) has a length of less than or equal to 70 millimetres, wherein a ratio of the weight of the aerosol-forming substrate (6) to the weight of the aerosol-generating article (100) is at least 0.45, and wherein a ratio of the length of the aerosol-forming substrate section (12) to the length of the aerosol-generating article (100) is at least 0.3.
  2. An aerosol-generating article (100) according to any preceding claim, wherein the ratio of the weight of the aerosol-forming substrate (6) to the weight of the aerosol-generating article (100) is at least 0.55.
  3. An aerosol-generating article (100) according to any preceding claim, wherein the ratio of the weight of the aerosol-forming substrate (6) to the weight of the aerosol-generating article (100) is at least 0.65.
  4. An aerosol-generating article (100) according to any preceding claim, wherein a ratio of the weight of the downstream section (4) to the weight of the aerosol-generating article (100) is less than or equal to 0.45.
  5. An aerosol-generating article (100) according to any preceding claim, wherein the downstream section (4) has a length of between 18 millimetres and 40 millimetres.
  6. An aerosol-generating article (100) according to any preceding claim, wherein the downstream section (4) has a resistance to draw (RTD) of less than 20 mm H 2 O.
  7. An aerosol-generating article (100) according to any preceding claim , wherein the upstream element (18) is formed of a hollow tubular segment (14, 22) defining a longitudinal cavity providing an unrestricted flow channel.
  8. An aerosol-generating article (100) according to any preceding claim, wherein the upstream element (18) has a weight of less than or equal to 70 milligrams.
  9. An aerosol-generating article (100) according to any preceding claim, comprising one or more susceptor elements (24), wherein the one or more susceptor elements (24) are provided in the aerosol-forming substrate section (2).
  10. An aerosol-generating article (100) according to any preceding claim, wherein the aerosol-forming substrate section (2) has a length of at least 8 millimetres.
  11. An aerosol-generating article (100) according to any preceding claim, wherein the aerosol-forming substrate (2) comprises one or more aerosol formers.
  12. An aerosol-generating article (100) according to any preceding claim, wherein the aerosol-forming substrate (2) has an aerosol former content of at least 10 percent by weight, on a dry weight basis.
  13. An aerosol-generating system (800) comprising: an aerosol-generating article (100) according to any one of the preceding claims; and an aerosol-generating device (900) comprising: a heating chamber for receiving the aerosol-generating article (100); and at least a heating element provided at or about the periphery of the heating chamber.

Description

The present invention relates to an aerosol-generating article comprising an aerosol-forming substrate section comprising an aerosol-forming substrate. A ratio of the weight of the aerosol-forming substrate to the weight of the aerosol-generating article is higher than in typical aerosol-generating articles. Aerosol-generating articles in which an aerosol-forming substrate, such as a tobacco-containing substrate, is heated rather than combusted, are known in the art. Typically, in such heated smoking articles an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-forming substrate or material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-forming substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol. A number of prior art documents disclose aerosol-generating devices for consuming aerosol-generating articles. Such devices include, for example, electrically heated aerosol-generating devices in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating device to the aerosol-forming substrate of a heated aerosol-generating article. For example, electrically heated aerosol-generating devices have been proposed that comprise an internal heater blade which is adapted to be inserted into the aerosol-forming substrate (WO 2013/098405). Use of an aerosol-generating article in combination with an external heating system is also known. For example, WO 2020/115151 describes the provision of one or more heating elements arranged around the periphery of the aerosol-generating article when the aerosol-generating article is received in a cavity of the aerosol-generating device. As an alternative, inductively heatable aerosol-generating articles comprising an aerosol-forming substrate and a susceptor arranged within the aerosol-forming substrate have been proposed by WO 2015/176898. WO2022/074240A1 provides for an aerosol-generating article. The article comprising an aerosol-generating substrate; a downstream section; wherein the aerosol-generating substrate has a density of no more than 0.5 grams per cubic centimetre, and wherein the ratio of the length of the aerosol-generating substrate to the length of the aerosol-generating article is no more than 0.4 WO2020/115151A1 describes an aerosol-generating article comprising a substrate portion containing an aerosol-forming substrate. The substrate portion having a length of between 20 millimetres and 60 millimetres and a diameter of between 4 and 7 millimetres, wherein the aerosol-forming substrate comprises an aerosol former, wherein the amount of former ranges between 6 and 20 percent by weight on a dry weight basis of the aerosol-forming substrate, and wherein the aerosol-generating article comprises a connect portion. WO2021/170677A1 provides for an aerosol-generating article for producing an inhalable aerosol upon heating. The aerosol-generating article comprises a rod of aerosol-generating substrate; and a downstream section comprising an aerosol-cooling element in longitudinal alignment with the rod of aerosol-generating substrate; wherein the aerosol-cooling element comprises a hollow tubular segment that defines a cavity; the aerosol-generating article further comprising a ventilation zone at a location along the hollow tubular segment; the hollow tubular segment having a length of less than about 10 millimetres. Aerosol-generating articles in which a tobacco-containing substrate is heated rather than combusted present a number of challenges that were not encountered with conventional smoking articles. For example, with some aerosol-forming substrates, it can be difficult to deliver sufficient aerosol to a user. It would be desirable to provide a new and improved aerosol-generating article. There is provided an aerosol-generating article comprising: an aerosol-forming substrate section containing an aerosol-forming substrate; an upstream section provided at an upstream end of the aerosol-forming substrate section, the upstream section comprising an upstream element; and a downstream section provided at a downstream end of the aerosol-forming substrate section, the downstream section comprising: one or more hollow tubular elements, wherein the aerosol-generating article has a length of less than or equal to 70 millimetres, wherein a ratio of the weight of the aerosol-forming substrate to the weight of the aerosol-generating article is at least 0.45, and wherein a ratio of the length of the aerosol-forming substrate section to the length of the aerosol-generating article is at least 0.3. There is also provided an aerosol-generating system comprising: an aerosol-generating article and an aerosol-gene