RU-2861712-C2 - AEROSOL-GENERATING ARTICLE COMPRISING HOLLOW TUBULAR SUBSTRATE ELEMENT

RU2861712C2RU 2861712 C2RU2861712 C2RU 2861712C2RU-2861712-C2

Abstract

FIELD: tobacco industry. SUBSTANCE: invention relates to an aerosol-generating article. An aerosol-generating article comprises: an aerosol-generating substrate comprising a hollow tubular substrate element having a multilayer peripheral wall defining a longitudinal airflow channel, wherein the peripheral wall is formed from a plurality of overlapping layers of homogenised tobacco material, wherein the peripheral wall has a density of at least 200 milligrams per cubic centimetre, and wherein the longitudinal airflow channel has a diameter of at least 3 millimetres; and a downstream section provided downstream of the aerosol-generating substrate. EFFECT: relatively high density of the peripheral wall maximises the amount of tobacco material that can be provided for a given length of the aerosol-generating substrate, so that the amount of aerosol generated from the hollow tubular substrate element is maximised. 14 cl, 2 dwg

Inventors

BATISTA, Rui Nuno Rodrigues Alves

Dates

Publication Date: 20260508
Application Date: 20221205
Priority Date: 20211206

Claims (16)

1. An aerosol generating article comprising:
an aerosol-generating substrate comprising a hollow tubular member in the form of a substrate having a multi-layer peripheral wall defining a longitudinal air flow channel, wherein the peripheral wall is formed from a plurality of overlapping layers of homogenized tobacco material, wherein the peripheral wall has a density of at least 200 milligrams per cubic centimeter, and wherein the longitudinal air flow channel has a diameter of at least 3 millimeters; and
a downstream section provided downstream of the aerosol-generating substrate.
2. An aerosol generating article according to claim 1, characterized in that the peripheral wall of the hollow tubular element in the form of a substrate has a cross-sectional porosity of at least 0.3.
3. An aerosol generating article according to claim 1 or 2, characterized in that the peripheral wall contains one or more layers of a first homogenized tobacco material and one or more layers of a second homogenized tobacco material having a composition different from the first homogenized tobacco material.
4. An aerosol generating article according to claim 3, characterized in that the first homogenized tobacco material and the second homogenized tobacco material have different porosity relative to each other.
5. An aerosol generating article according to any one of the preceding claims, characterized in that a plurality of layers of homogenized tobacco material are helically wound around the longitudinal axis of a hollow tubular element in the form of a substrate.
6. An aerosol generating article according to any one of the preceding claims, characterized in that the peripheral wall provides at least 150 milligrams of homogenized tobacco material per centimeter of the hollow tubular element in the form of a substrate.
7. An aerosol-generating article according to any of the preceding paragraphs, characterized in that the aerosol-generating substrate additionally contains a susceptor element.
8. An aerosol generating article according to claim 7, characterized in that it contains a tubular susceptor element on at least one surface of a hollow tubular element in the form of a substrate.
9. An aerosol generating article according to any of the preceding claims, characterized in that the outer surface of the hollow tubular element in the form of a substrate is at least partially exposed on the outer surface of the aerosol generating article.
10. An aerosol generating article according to any of the preceding claims, characterized in that the hollow tubular element in the form of a substrate has a length of at least 15 millimeters.
11. An aerosol generating article according to any of the preceding claims, characterized in that the ratio of the length of the hollow tubular element in the form of a substrate to the total length of the article is at least 0.15.
12. An aerosol generating article according to any of the preceding claims, characterized in that the downstream section comprises at least one hollow tubular element.
13. An aerosol generating article according to claim 12, characterized in that the ratio between the length of the hollow tubular element in the form of a substrate and the length of the hollow tubular element of the section located further downstream is from 0.25 to 1.25.
14. An aerosol generating article according to claim 12 or 13, characterized in that the downstream section further comprises a mouthpiece element at the downstream end of the article.

Description

The present invention relates to an aerosol-generating article comprising an aerosol-generating substrate that is adapted to create an inhalable aerosol upon heating. Aerosol-generating articles in which the aerosol-generating substrate is heated during use to generate the aerosol. For example, if an external heating element is used to heat the aerosol-generating substrate rod, as described above, the central portion of the aerosol-generating substrate rod is less likely to generate as much aerosol as the outer portions of the rod, and in some cases may not generate any aerosol at all. Overall, therefore, aerosol generation from the aerosol-generating rod is likely to be inefficient, with potential loss of some of the aerosol-generating substrate. It would therefore be desirable to provide an aerosol-generating article comprising an aerosol-generating substrate that is adapted to ensure more efficient conversion of the aerosol-generating substrate into aerosol and that reduces the loss of substrate materials, such as tobacco. It would be particularly desirable to provide such an article with a relatively simple design so that it can be manufactured cost-effectively and incorporated into existing product designs. It would also be desirable to provide such an article that is easily adaptable to be heated by various types of heating devices, including induction and resistive heating devices. The present invention relates to an aerosol-generating article. The aerosol-generating article may comprise an aerosol-generating substrate comprising a hollow tubular element in the form of the substrate. The hollow tubular element in the form of the substrate may have a multilayer peripheral wall defining a channel for longitudinal air flow. The peripheral wall may be formed from several overlapping layers of homogenized tobacco material. The channel for longitudinal air flow may have a diameter of at least 3 millimeters. The aerosol-generating article may further comprise a downstream section located downstream of the aerosol-generating substrate. According to the present invention, there is provided an aerosol generating article comprising: an aerosol generating substrate comprising a hollow tubular element in the form of a substrate having a multi-layer peripheral wall defining a channel for a longitudinal air flow, wherein the peripheral wall is formed from several overlapping layers of homogenized tobacco material, and wherein the channel for the longitudinal air flow has a diameter of at least 3 millimeters; and a downstream section provided downstream of the aerosol generating substrate. For the purposes of this document, the term "aerosol-generating article" refers to a heated article for creating an aerosol, wherein the article comprises an aerosol-generating substrate that is suitable and designed to be heated or combusted to release volatile compounds that can form an aerosol. Such articles are commonly referred to as heated-without-combustion articles. A typical cigarette is ignited when the user applies a flame to one end of the cigarette and draws air through the other end. The localized heat provided by the flame and oxygen in the air drawn through the cigarette causes the end of the cigarette to ignite, and the resulting combustion generates inhalable smoke. By comparison, the aerosol is generated by heating the aerosol-generating substrate, rather than by burning the aerosol-generating substrate in "heated aerosol-generating articles." Known heated aerosol-generating articles include, for example, electrically heated aerosol-generating articles and aerosol-generating articles in which the aerosol is generated by transferring heat from a combustible fuel element or heat source to a physically separated aerosol-generating substrate. Aerosol-generating articles are also known that are adapted for use in an aerosol-generating system that supplies aerosol-forming material to the aerosol-generating articles. In such a system, the aerosol-generating substrate in the aerosol-generating articles contains substantially less aerosol-forming material than aerosol-generating substrates that contain and supply substantially all of the aerosol-forming material used to generate the aerosol during operation. For the purposes of this document, the term "aerosol-generating substrate" refers to a substrate capable of releasing volatile compounds that can form an aerosol when heated. Aerosol generated from aerosol-generating substrates and aerosol-generating articles described in this document may be visible or invisible and may contain vapors (e.g., finely dispersed particles of substances in a gaseous state that are typically liquid or solid at room temperature), as well as gases and liquid droplets of condensed vapors. As used herein, the term "homogenized plant material" encompasses any plant material formed by agglomerating plant particles. For example, sheets or webs of homogenized tobacco material for aerosol-generati