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EP-4736673-A2 - AEROSOL-GENERATING ARTICLE WITH REDUCED BULK WRAPPER

EP4736673A2EP 4736673 A2EP4736673 A2EP 4736673A2EP-4736673-A2

Abstract

There is provided an aerosol-generating article (10). The aerosol-generating article (10) comprises an aerosol-forming section (17b). The aerosol-forming section (17b) comprises a rod of aerosol-generating substrate (12). The aerosol-forming section (17b) comprises an intermediate section (17a) located downstream of the rod of aerosol-generating substrate (12). The intermediate section (17a) comprises one or more hollow tubular elements (14, 15). The aerosol-generating article (10) comprises a mouthpiece element (18). The mouthpiece element (18) is located downstream of the aerosol-forming section (17b). The aerosol-generating article (10) comprises at least two wrappers (16, 19). The at least two wrappers (16, 19) comprise a first wrapper (16) circumscribing only the aerosol-forming section (17b). The first wrapper (16) has a bulk of less than or equal to 1.42 cubic centimetres per gram. The at least two wrappers (16, 19) comprise a second wrapper (19) circumscribing at least part of the mouthpiece element (18). Each of the first wrapper (16) and the second wrapper (19) form at least part of an outer surface of the aerosol-generating article (10). The first wrapper (16) is in direct physical contact with the intermediate section (17a).

Inventors

  • Camus, Alexandre

Assignees

  • Philip Morris Products S.A.

Dates

Publication Date
20260506
Application Date
20240201

Claims (13)

  1. An aerosol-generating article (10), the aerosol-generating article (10) comprising: an aerosol-forming section (17b), the aerosol-forming section (17b) comprising: a rod of aerosol-generating substrate (12); and an intermediate section (17a) located downstream of the rod of aerosol-generating substrate (12), the intermediate section (17a) comprising one or more hollow tubular elements (14, 15); a mouthpiece element (18), the mouthpiece element (18) located downstream of the aerosol-forming section (17b); and at least two wrappers, the at least two wrappers comprising: a first wrapper (16) circumscribing only the aerosol-forming section (17b), the first wrapper (16) having a bulk of less than or equal to 1.42 cubic centimetres per gram; a second wrapper (19) circumscribing at least part of the mouthpiece element (18), wherein each of the first wrapper (16) and the second wrapper (19) form at least part of an outer surface of the aerosol-generating article (10), wherein the first wrapper (16) is in direct physical contact with the intermediate section (17a), wherein the second wrapper (19) has a second wrapper length along a longitudinal axis of the aerosol-generating article (10) and the aerosol-generating article (10) has an article length along the longitudinal axis of the aerosol-generating article (10), and wherein the second wrapper length is less than or equal to 60 percent of the article length.
  2. An aerosol-generating article (10) according to claim 1, wherein the first wrapper (16) has a bulk of greater than or equal to 0.75 cubic centimetres per gram.
  3. An aerosol-generating article (10) according to claim 1 or 2, wherein the first wrapper (16) has a thickness of greater than or equal to 36 micrometres.
  4. An aerosol-generating article (10) according to any preceding claim, wherein the first wrapper (16) has a thickness of less than or equal to 90 micrometres.
  5. An aerosol-generating article (10) according to any preceding claim, wherein the first wrapper (16) has a grammage of greater than or equal to 33.5 grams per square metre.
  6. An aerosol-generating article (10) according to any preceding claim, wherein the first wrapper (16) has a grammage of less than or equal to 70 grams per square metre.
  7. An aerosol-generating article (10) according to any preceding claim, wherein the first wrapper (16) has a first wrapper length along the longitudinal axis of the aerosol-generating article (10), and wherein the first wrapper length is greater than the second wrapper length.
  8. An aerosol-generating article (10) according to any preceding claim, wherein the first wrapper (16) extends from an upstream end of the article (10).
  9. An aerosol-generating article (10) according to any preceding claim, wherein the second wrapper (19) extends from a downstream end of the article (10).
  10. An aerosol-generating article (10) according to any preceding claim, wherein at least one of the first wrapper (16) and the second wrapper (19) comprises a cellulosic material, optionally selected from one or more of paper, wood, textile, natural fibres, and artificial fibres.
  11. An aerosol-generating article (10) according to any preceding claim, wherein one or both of the first wrapper (16) and the second wrapper (19) each have a permeability of less than or equal to 10 CORESTA units.
  12. An aerosol-generating article (10) according to any preceding claim, wherein the second wrapper (19) comprises a printed element on a surface of the second wrapper.
  13. An aerosol-generating system (1000) comprising: an aerosol-generating article (10) according to any preceding claim; and an aerosol-generating device (100) configured to heat the aerosol-generating article (10).

Description

The present disclosure relates to an aerosol-generating article comprising a rod of aerosol-generating substrate and at least two wrappers. Aerosol-generating articles in which an aerosol-generating substrate, such as a tobacco containing substrate, is heated rather than combusted are known in the art. In heated aerosol-generating articles, the aerosol is generated by heating the aerosol-generating substrate. It is known to provide a heating element for heating an aerosol-generating substrate of an aerosol-generating article. The heating element may be provided in the article in the form of a susceptor element, which is capable of being heated when penetrated by a varying magnetic field. Alternatively or additionally, the heating element may be provided in an aerosol-generating device for generating an inhalable vapor. Such a device may heat the aerosol-generating substrate contained in the aerosol-generating article without burning the aerosol-generating substrate. The aerosol-generating article may have a rod shape configured for insertion of a portion of the aerosol-generating article into a device cavity of the aerosol-generating device. The aerosol-generating device may also comprise a heating element configured for insertion into the rod of aerosol-generating substrate. The heating element may be located in the device cavity. When the aerosol-generating substrate of the aerosol-generating article is received in the device cavity, the heating element may penetrate the aerosol-generating substrate, and be inserted into the aerosol-generating substrate to heat the aerosol-generating substrate from the inside. Heatable aerosol-generating articles may comprise one or more wrappers, circumscribing at least part of the aerosol-generating article. The provision of one or more wrappers may secure the components of the aerosol-generating article together. During use, the outer, peripheral portions of the aerosol-generating substrate further away from the heating element may receive less heat from the heating element than the portions of the aerosol-generating substrate which are closer to the heating element. This results in a temperature gradient which may encourage condensation and slurry to migrate to cooler portions of the aerosol-generating substrate such as the outer periphery of the substrate. As a result, the wrapper may become stained, humid or wet during use. Wetting of the wrapper may decrease the tensile strength of the wrapper which may cause the aerosol-generating article to break, particularly at the junction between components of the aerosol-generating article, inside the device cavity of the aerosol-generating device when extracting the aerosol-generating article after use. It is also known to provide wrappers on aerosol-generating articles which have been printed with coatings such as a lip release lacquer or, for example, indicia or a distinctive colour on the surface of the wrapper to provide an aerosol-generating article with a more aesthetically appealing and distinctive appearance. However, it may be desired to provide only a part of the length of the wrapper, such as at the mouth end of the aerosol-generating article, with the coating, indicia or distinctive colour. However, this may increase the complexity of the manufacturing process if the coating, indicia or distinctive colour are only applied to part of the surface of the wrapper. It would be desirable to provide a wrapper with increased wet tensile strength and dry tensile strength to increase the mechanical robustness of the aerosol-generating article, particularly after use, to reduce the risk of breakage while extracting the aerosol-generating article from the device cavity of the aerosol-generating device. Furthermore, it would be desirable to configure the wrapper such that coatings, indicia or distinctive colours can be more easily applied to different portions of the aerosol-generating article without requiring complex manufacturing techniques or modifications to existing manufacturing processes. According to the present invention there is provided an aerosol-generating article. The aerosol-generating article may comprise an aerosol-forming section. The aerosol-forming section may comprise a rod of aerosol-generating substrate. The aerosol-forming section may comprise an intermediate section located downstream of the rod of aerosol-generating substrate. The intermediate section may comprise one or more hollow tubular elements. The aerosol-generating article may comprise a mouthpiece element. The mouthpiece element may be located downstream of the aerosol-forming section. The aerosol-generating article may comprise at least two wrappers. The at least two wrappers may comprise a first wrapper circumscribing only the aerosol-forming section. The first wrapper may have a bulk of less than or equal to 1.42 cubic centimetres per gram. The at least two wrappers may comprise a second wrapper circumscribing at least part of the mouth