JP2023520322A - Aerosol-generating article with mouthpiece assembly - Google Patents

Abstract

An aerosol generating article (112) is provided for generating an inhalable aerosol upon heating. The aerosol-generating article (112) comprises a mouthpiece assembly (110) including a first tube (118), a second tube (120), and a third tube (122); an aerosol-forming substrate (142); including. The first tube (118) abuts the downstream end face (130) of the second tube (120) and the third tube (122) abuts the upstream end face (128) of the second tube (120). The inner diameter (138) of the second tube (120) is smaller than the inner diameter (136) of the first tube (118). The inner diameter (138) of the second tube (120) is smaller than the inner diameter (140) of the third tube (122). The inner diameter (136) of the first tube (118) is between 3 mm and 8 mm. The ratio of the inner diameter (136) of the first tube (118) to the inner diameter (138) of the second tube (120) is 1.2-5. The ratio of the inner diameter (136) of the first tube (118) to the inner diameter (140) of the third tube (122) is between 0.5 and 2. [Selection drawing] Fig. 2

Description

The present invention relates to an aerosol-generating article with a mouthpiece assembly.

Some aerosol-generating articles heat rather than burn an aerosol-generating substrate, such as a tobacco-containing substrate. In such heated aerosol-generating articles, the aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which is in contact with or within the heat source. , or may be located around the heat source or downstream of the heat source. During use of the aerosol-generating article, heat is transferred from the heat source to the aerosol-generating substrate, which can release volatile compounds. These volatile compounds are entrained in air drawn through the aerosol-generating article by the user. The released volatile compounds condense to form an aerosol as they cool. Aerosols can be inhaled through the mouthpiece by the user.

It is desirable to provide an aerosol-generating article that can condense more of the released volatile compounds, thereby increasing the flow of the aerosol through the mouthpiece. This can provide a better user experience.

Aerosol-generating articles are provided for generating an inhalable aerosol upon heating. The aerosol-generating article may comprise a mouthpiece assembly. The mouthpiece assembly may include a first tube. The mouthpiece assembly may include a second tube. The mouthpiece assembly may include a third tube. The aerosol-generating article may comprise an aerosol-forming substrate. The first tube may abut the downstream end face of the second tube. The third tube may abut the upstream end face of the second tube. The inner diameter of the second tube may be smaller than the inner diameter of the first tube. The inner diameter of the second tube may be smaller than the inner diameter of the third tube. The inner diameter of the first tube may be at least 3 mm.

1. An aerosol-generating article for generating an inhalable aerosol upon heating, comprising a mouthpiece assembly including a first tube, a second tube, and a third tube; an aerosol-forming substrate; The first pipe abuts the downstream end face of the second pipe, the third pipe abuts the upstream end face of the second pipe, the inner diameter of the second pipe is smaller than the inner diameter of the first pipe, and the An aerosol generating article is provided wherein the inner diameter of the second tube is less than the inner diameter of the third tube and the inner diameter of the first tube is at least 3 mm.

An aerosol-generating system comprising an aerosol-generating device and an aerosol-generating article, wherein the aerosol-generating component comprises a mouthpiece assembly including a first tube, a second tube, and a third tube, and an aerosol-forming substrate. , the first tube abuts the downstream end face of the second tube, the third tube abuts the upstream end face of the second tube, and the inner diameter of the second tube is smaller than the inner diameter of the first tube There is also provided an aerosol generating system, wherein the inner diameter of the second tube is less than the inner diameter of the third tube and the inner diameter of the first tube is at least 3 mm.

An aerosol-generating article comprising a mouthpiece assembly formed from multiple tubes may increase the amount of aerosol drawn from the aerosol-generating article by virtue of the second tube being narrower in diameter than the first and third tubes. . This increased amount of aerosol can improve the user's experience.

Aerosol formation, particularly droplet size, depends on multiple factors, such as temperature and atmospheric pressure.

During use of the aerosol-generating article, volatile compounds within the aerosol-forming substrate are vaporized, for example, by thermal evaporation. The vapor is cooled and nucleated to form an aerosol. When a user inhales at the downstream end of the aerosol-generating article, air is drawn toward the downstream end and the moving air entrains the aerosol and vaporized volatile compounds.

In a typical aerosol-generating article, the aerosol exits directly from the downstream end of the aerosol-generating article and is then inhaled by the user. However, in aerosol-generating articles according to the present invention, the narrow diameter second tube constricts the flow of air as it passes through the mouthpiece assembly. In other words, the second tube provides a venturi effect. As the aerosol-laden air is drawn from the second tube into the first tube, the larger diameter first tube allows the air to expand and cool, thereby producing more droplets. It can be formed into an aerosol. As with typical aerosol-generating articles, the aerosol is then inhaled by the user through the downstream end of the first tube.

Accordingly, the aerosol-generating article can provide an increased volume of aerosol droplets, thereby providing an improved user experience.

Additionally, because the first tube has a larger diameter than the second tube, the resulting aerosol expansion may improve the user's fill perception.

Additionally, forming the mouthpiece assembly from a series of tubes can provide a number of additional advantages.

First, the first tube, second tube, and third tube can provide increased stiffness compared to, for example, a paper shell, thus improving handling of the aerosol-generating article. can.

Second, manufacturing the aerosol-generating article may be easier because it is relatively straightforward to machine multiple tubes and then assemble the tubes together.

Third, the use of multiple tubes provides increased flexibility in terms of inner diameter and length.

The term "aerosol-generating article" is used herein to mean an article in which an aerosol-forming substrate is heated to produce an inhalable aerosol for delivery to the consumer. As used herein, the term "aerosol-forming substrate" means a substrate capable of releasing a volatile compound upon heating to generate an aerosol.

A conventional cigarette is lit when a user places a flame on one end of the cigarette and draws air through the other end. The localized heat provided by the flame and the oxygen in the air drawn through the cigarette ignites the ends of the cigarette and the resulting combustion produces inhalable smoke. In contrast, in heated aerosol-generating articles, the aerosol is generated by heating the flavor-generating substrate (such as tobacco). Known heated aerosol-generating articles include, for example, electrically heated aerosol-generating articles and aerosol-generating articles in which an aerosol is generated by the transfer of heat from a combustible fuel element or heat source to a physically separate aerosol-forming material. and For example, aerosol-generating articles according to the present invention find particular application in aerosol-generating systems comprising electrically heated aerosol-generating devices having internal heater blades adapted to be inserted into rods of aerosol-forming substrates. . Aerosol-generating articles of this type are described in the prior art, eg EP081212670.

As used herein, the term "aerosol-generating device" refers to a device comprising a heater element that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol.

As used herein, the term "longitudinal" refers to a direction corresponding to the major longitudinal axis of the aerosol-generating article, extending between the upstream and downstream ends of the aerosol-generating article. As used herein, the terms "upstream" and "downstream" describe the relative positions of elements (or portions of elements) of an aerosol-generating article with respect to the direction in which aerosol is transported through the aerosol-generating article during use. do.

As used herein, the term "abutting" is used to describe a component or portion of a component that is in direct contact with another component or portion of a component.

A mouthpiece assembly may be positioned toward the downstream end of the aerosol-generating article. A mouthpiece assembly may be located at the downstream end of the aerosol-generating article.

One or more of the first tube, second tube, and third tube may be cellulose acetate tubes. In other words, one or more of the first tube, second tube, and third tube may be formed from cellulose acetate. For example, the first tube may be a cellulose acetate tube. The second tube may be a cellulose acetate tube. The third tube may be a cellulose acetate tube.

Cellulose acetate tubing may alternatively be referred to as "hollow acetate tubing" or HAT.

Advantageously, forming the first tube from cellulose acetate can further improve the stiffness and elasticity of the mouthpiece assembly, thereby enhancing the user experience. Additionally, forming the first tube from cellulose acetate results in a mouthpiece assembly that is less sensitive to the humidity of the user's mouth, since cellulose acetate is substantially impermeable to water. can be

The aerosol-generating article may comprise a fourth tube. A fourth tube may be positioned within the opening defined by the third tube. A fourth tube may be located within the third tube. A third tube may surround the fourth tube. The fourth tube may align with the inner surface of the third tube.

A fourth tube may be formed from a substantially non-porous material. For example, the fourth tube may be formed from cardboard.

Advantageously, the fourth tube allows the greatest portion of the aerosol to flow along the longitudinal axis towards the second and third tubes and radially through the surrounding material of the third tube. It can be ensured that it does not flow in one direction.

The aerosol-generating article may comprise a wrapper. A wrapper may be provided over the exterior surface of the mouthpiece assembly. A wrapper may be provided on the exterior surface of the first tube, the second tube and the third tube. A wrapper may be provided over the exterior surface area of the aerosol-generating article. The wrapper may be formed from a non-porous material. In one embodiment, the wrapper is formed from cellulose acetate paper.

Advantageously, radial airflow through the first, second and third tubes can be reduced when the aerosol-generating article comprises a wrapper. Reducing the radial airflow through the first, second and third tubes can increase the aerosol flow rate from the mouthpiece.

The ratio of the inner diameter of the first tube to the inner diameter of the second tube may be 1.2-5. The ratio of the inner diameter of the first tube to the inner diameter of the second tube may be 1.4-4. The ratio of the inner diameter of the first tube to the inner diameter of the second tube may be 1.6-3. The ratio of the inner diameter of the first tube to the inner diameter of the second tube may be between 1.8 and 2.5.

The ratio of the inner diameter of the first tube to the inner diameter of the second tube may be two.

In some embodiments, the ratio of the inner diameter of the first tube to the inner diameter of the second tube is a trade-off. Advantageously, maximizing this ratio can improve the expansion effect of the aerosol and improve the user experience. However, if this ratio is too high, the withdrawal resistance of the second tube will be too high and the use of the aerosol generator can be very difficult.

The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be 0.5-2. The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be between 0.7 and 1.3. The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be between 0.8 and 1.2. The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be between 0.9 and 1.1. The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be between 0.95 and 1.05.

The ratio of the inner diameter of the first tube to the inner diameter of the third tube may be one.

The ratio of the inner diameter of the third tube to the inner diameter of the second tube may be 1.2-5. The ratio of the inner diameter of the third tube to the inner diameter of the third tube may be 1.4-4. The ratio of the inner diameter of the third tube to the inner diameter of the third tube may be 1.6-3. The ratio of the inner diameter of the third tube to the inner diameter of the third tube may be between 1.8 and 2.5.

The ratio of the inner diameter of the third tube to the inner diameter of the second tube may be two.

In some embodiments, the ratio of the inner diameter of the third tube to the inner diameter of the second tube is a trade-off. Advantageously, maximizing this ratio can improve the venturi effect of the mouthpiece assembly, which can improve nucleation. However, if this ratio is too high, the withdrawal resistance of the second tube will be too high and the use of the aerosol generator can be very difficult. Additionally or alternatively, if this ratio is too high, the wall thickness of the third tube may be too small, thereby making the aerosol-generating article difficult to handle.

The first tube may be located downstream of the second tube. The first tube may be located downstream of the third tube. The first tube may be located at the downstream end of the mouthpiece assembly.

The longitudinal cross-sectional shape of the first tube may be circular. The longitudinal cross-sectional shape of the first tube may be annular.

The first tube may have a uniform inner diameter. In other words, the inner diameter of the first tube may be the same along its length.

In embodiments where the first tube has a uniform inner diameter, the inner diameter of the first tube is taken to be the fixed diameter of the first tube.

Alternatively, the first tube may have a varying inner diameter. In other words, the inner diameter of the first tube may vary along its length. For example, the inner diameter of the first tube may increase from one end to the other. The inner diameter of the first tube may decrease from one end to the other.

In certain embodiments, the inner diameter of the first tube can increase from the upstream end of the first tube to the downstream end of the first tube. In other words, the inner diameter of the first tube at its downstream end is greater than the inner diameter of the first tube at its upstream end. Advantageously, this "funneling out" of the inner diameter of the first tube improves the palatability of the aerosol.

In embodiments where the first tube has a varying inner diameter, the inner diameter of the first tube is taken to be the average diameter of the first tube.

The inner diameter of the first tube may be greater than the inner diameter of the third tube.

Advantageously, the inner diameter of the first tube is greater than the inner diameter of the third tube, which may further improve the user's filling perception.

The first tube may have an inner diameter of at least 3 mm. The first tube may have an inner diameter of at least 3.25 mm. The first tube may have an inner diameter of at least 3.5 mm. The first tube may have an inner diameter of at least 3.75 mm. The first tube may have an inner diameter of at least 4 mm. The first tube may have an inner diameter of at least 4.25 mm. The first tube may have an inner diameter of at least 4.5 mm. The first tube may have an inner diameter of at least 4.75 mm. The first tube may have an inner diameter of at least 5 mm.

The first tube may have an inner diameter of 8 mm or less. The first tube may have an inner diameter of 7.75 mm or less. The first tube may have an inner diameter of 7.5 mm or less. The first tube may have an inner diameter of 7.25 mm or less. The first tube may have an inner diameter of 7 mm or less. The first tube may have an inner diameter of 6.75 mm or less. The first tube may have an inner diameter of 6.5 mm or less. The first tube may have an inner diameter of 6.25 mm or less. The first tube may have an inner diameter of 6 mm or less. The first tube may have an inner diameter of 5.75 mm or less. The first tube may have an inner diameter of 5.5 mm or less. The first tube may have an inner diameter of 5.25 mm or less. The first tube may have an inner diameter of 5 mm or less. The first tube may have an inner diameter of 4.75 mm or less. The first tube may have an inner diameter of 4.5 mm or less. The first tube may have an inner diameter of 4.25 mm or less. The first tube may have an inner diameter of 4 mm or less.

The first tube may have an inner diameter of 3 mm to 8 mm. The first tube may have an inner diameter between 3.25 mm and 8 mm. The first tube may have an inner diameter of 3.5 mm to 8 mm. The first tube may have an inner diameter between 3.75 mm and 8 mm. The first tube may have an inner diameter of 4 mm to 8 mm. The first tube may have an inner diameter of 4.25 mm to 5 mm. The first tube may have an inner diameter of 4.5 mm to 8 mm. The first tube may have an inner diameter between 4.75 mm and 8 mm. The first tube may have an inner diameter of 5 mm to 8 mm.

The first tube may have an inner diameter between 3 mm and 7.75 mm. The first tube may have an inner diameter of 3 mm to 7.5 mm. The first tube may have an inner diameter of 3 mm to 7.25 mm. The first tube may have an inner diameter of 3 mm to 7 mm. The first tube may have an inner diameter of 3 mm to 6.75 mm. The first tube may have an inner diameter of 3 mm to 6.5 mm. The first tube may have an inner diameter of 3 mm to 6.25 mm. The first tube may have an inner diameter of 3 mm to 6 mm. The first tube may have an inner diameter of 3 mm to 5.75 mm. The first tube may have an inner diameter of 3 mm to 5.5 mm. The first tube may have an inner diameter of 3 mm to 5.25 mm. The first tube may have an inner diameter of 3mm to 5mm. The first tube may have an inner diameter of 3 mm to 4.75 mm. The first tube may have an inner diameter of 3 mm to 4.5 mm. The first tube may have an inner diameter of 3 mm to 4.25 mm. The first tube may have an inner diameter of 3mm to 4mm.

The first tube may have an inner diameter of 3.3 mm to 6 mm. The first tube may have an inner diameter of 3.4 mm to 5.5 mm. The first tube may have an inner diameter of 3.5 mm to 5 mm. The first tube may have an inner diameter between 3.6 mm and 4.75 mm. The first tube may have an inner diameter of 3.7mm to 4.5mm. The first tube may have an inner diameter between 3.9 mm and 4.25 mm.

In one example, the first tube has an inner diameter of 4 mm.

The first tube may have a length of at least 4mm. The first tube may have a length of at least 4.25mm. The first tube may have a length of at least 4.5mm. The first tube may have a length of at least 4.75mm. The first tube may have a length of at least 5mm. The first tube may have a length of at least 5.25mm. The first tube may have a length of at least 5.5mm. The first tube may have a length of at least 5.75mm. The first tube may have a length of at least 6mm.

The first tube may have a length of 6 mm or less. The first tube may have a length of 5.75 mm or less. The first tube may have a length of 5.5 mm or less. The first tube may have a length of 5.25 mm or less. The first tube may have a length of 5 mm or less. The first tube may have a length of 4.75 mm or less. The first tube may have a length of 4.5m or less. The first tube may have a length of 4.25 mm or less.

The first tube may have a length of 4mm to 6mm. The first tube may have a length between 4.25 mm and 6 mm. The first tube may have a length of 4.5mm to 6mm. The first tube may have a length between 4.75 mm and 6 mm. The first tube may have a length of 5mm to 6mm. The first tube may have a length of 5.25mm to 6mm. The first tube may have a length of 5.5mm to 6mm. The first tube may have a length of 5.75mm to 6mm.

The first tube may have a length between 4mm and 5.75mm. The first tube may have a length of 4mm to 5.5mm. The first tube may have a length between 4 mm and 5.25 mm. The first tube may have a length of 4mm to 5mm. The first tube may have a length between 4 mm and 4.75 mm. The first tube may have a length of 4mm to 4.5mm. The first tube may have a length of 4mm to 4.25mm.

The first tube may have a length between 4.25mm and 5.75mm. The first tube may have a length between 4.25mm and 5.5mm. The first tube may have a length between 4.5mm and 5.75mm. The first tube may have a length of 4.5mm to 5.5mm. The first tube may have a length between 4.75mm and 5.5mm. The first tube may have a length of 4.5mm to 5.25mm. The first tube may have a length between 4.75mm and 5.25mm. In one example, the first tube has a length of 5 mm.

The second tube may be located between the first tube and the third tube. The second tube may be located intermediate the mouthpiece assembly.

The longitudinal cross-sectional shape of the second tube may be circular. The longitudinal cross-sectional shape of the second tube may be annular.

The second tube may have a uniform inner diameter. In other words, the inner diameter of the second tube may be the same along its length.

In embodiments where the second tube has a uniform inner diameter, the inner diameter of the second tube is considered to be the fixed diameter of the second tube.

Alternatively, the second tube may have a varying inner diameter. In other words, the inner diameter of the second tube can vary along its length. For example, the inner diameter of the second tube may increase from one end to the other. The inner diameter of the second tube may decrease from one end to the other.

In certain examples, the inner diameter of the second tube may increase from the upstream end of the second tube to the downstream end of the second tube. In other words, the inner diameter of the second tube at its downstream end is greater than the inner diameter of the third tube at its upstream end. Advantageously, this "funneling" of the inner diameter of the second tube can reduce filtration of aerosol into the second tube.

In embodiments where the second tube has a varying inner diameter, the inner diameter of the second tube is taken to be the average diameter of the second tube.

The second tube may have an inner diameter of at least 1 mm. The second tube may have an inner diameter of at least 1.25 mm. The second tube may have an inner diameter of at least 1.5 mm. The second tube may have an inner diameter of at least 1.75 mm. The second tube may have an inner diameter of at least 2 mm.

The second tube may have an inner diameter of 3 mm or less. The second tube may have an inner diameter of 2.75 mm or less. The second tube may have an inner diameter of 2.5 mm or less. The second tube may have an inner diameter of 2.25 mm or less. The second tube may have an inner diameter of 2 mm or less. The second tube may have an inner diameter of 1.75 mm or less. The second tube may have an inner diameter of 1.5 mm or less. The second tube may have an inner diameter of 1.25 mm or less.

The second tube may have an inner diameter of 1 mm to 3 mm. The second tube may have an inner diameter of 1.25 mm to 3 mm. The second tube may have an inner diameter of 1.5 mm to 3 mm. The second tube may have an inner diameter of 1.75 mm to 3 mm. The second tube may have an inner diameter of 2mm to 3mm. The second tube may have an inner diameter of 2.25 mm to 3 mm. The second tube may have an inner diameter of 2.5 mm to 3 mm. The second tube may have an inner diameter of 2.75 mm to 3 mm.

The second tube may have an inner diameter of 1 mm to 2.75 mm. The second tube may have an inner diameter of 1 mm to 2.5 mm. The second tube may have an inner diameter of 1 mm to 2.25 mm. The second tube may have an inner diameter of 1 mm to 2 mm. The second tube may have an inner diameter of 1 mm to 1.75 mm. The second tube may have an inner diameter of 1 mm to 1.5 mm. The second tube may have an inner diameter of 1 mm to 1.25 mm.

The second tube may have an inner diameter of 1.3 mm to 2.7 mm. The second tube may have an inner diameter of 1.4 mm to 2.6 mm. The second tube may have an inner diameter of 1.5 mm to 2.5 mm. The second tube may have an inner diameter of 1.6 mm to 2.4 mm. The second tube may have an inner diameter of 1.7 mm to 2.3 mm. The second tube may have an inner diameter of 1.8 mm to 2.2 mm.

In one example, the second tube has an inner diameter of 2 mm.

The second tube may have a length of at least 4mm. The second tube may have a length of at least 4.25mm. The second tube may have a length of at least 4.5mm. The second tube may have a length of at least 4.75mm. The second tube may have a length of at least 5mm. The second tube may have a length of at least 5.25mm. The second tube may have a length of at least 5.5mm. The second tube may have a length of at least 5.75mm. The second tube may have a length of at least 6mm.

The second tube may have a length of 6mm or less. The second tube may have a length of 5.75 mm or less. The second tube may have a length of 5.5 mm or less. The second tube may have a length of 5.25 mm or less. The second tube may have a length of 5 mm or less. The second tube may have a length of 4.75 mm or less. The second tube may have a length of 4.5 mm or less. The second tube may have a length of 4.25 mm or less.

The second tube may have a length of 4mm to 6mm. The second tube may have a length between 4.25 mm and 6 mm. The second tube may have a length of 4.5mm to 6mm. The second tube may have a length of 4.75mm to 6mm. The second tube may have a length of 5mm to 6mm. The second tube may have a length of 5.25mm to 6mm. The second tube may have a length of 5.5mm to 6mm. The second tube may have a length of 5.75mm to 6mm.

The second tube may have a length of 4mm to 5.75mm. The second tube may have a length of 4mm to 5.5mm. The second tube may have a length of 4mm to 5.25mm. The second tube may have a length of 4mm to 5mm. The second tube may have a length of 4mm to 4.75mm. The second tube may have a length of 4mm to 4.5mm. The second tube may have a length of 4mm to 4.25mm.

The second tube may have a length between 4.25mm and 5.75mm. The second tube may have a length of 4.25mm to 5.5mm. The second tube may have a length of 4.5mm to 5.75mm. The second tube may have a length of 4.5mm to 5.5mm. The second tube may have a length of 4.75mm to 5.5mm. The second tube may have a length of 4.5mm to 5.25mm. The second tube may have a length between 4.75mm and 5.25mm. In one example, the second tube has a length of 5 mm.

The third tube may be located upstream of the first tube. The third pipe may be located upstream of the second pipe. A third tube may be located at the upstream end of the mouthpiece assembly.

The longitudinal cross-sectional shape of the third tube may be circular. The longitudinal cross-sectional shape of the third tube may be annular.

The third tube may have a uniform inner diameter. In other words, the inner diameter of the third tube may be the same along its entire length.

In embodiments where the third tube has a uniform inner diameter, the inner diameter of the third tube is taken to be the fixed diameter of the third tube.

Alternatively, the third tube may have a varying inner diameter. In other words, the inner diameter of the third tube may vary along its length. For example, the inner diameter of the third tube may decrease from one end to the other. The inner diameter of the third tube may increase from one end to the other.

In certain embodiments, the inner diameter of the third tube may decrease from the upstream end of the third tube to the downstream end of the third tube. In other words, the inner diameter of the third tube at its upstream end is greater than the inner diameter of the third tube at its downstream end. Advantageously, "funneling in" the inner diameter of the third tube improves aerosol nucleation.

In embodiments where the third tube has a varying inner diameter, the inner diameter of the third tube is taken to be the average diameter of the third tube.

The third tube may have an inner diameter of at least 3 mm. The third tube may have an inner diameter of at least 3.25 mm. The third tube may have an inner diameter of at least 3.5 mm. The third tube may have an inner diameter of at least 3.75 mm. The third tube may have an inner diameter of at least 4 mm. The third tube may have an inner diameter of at least 4.25 mm. The third tube may have an inner diameter of at least 4.5 mm. The third tube may have an inner diameter of at least 4.75 mm. The third tube may have an inner diameter of at least 5 mm.

The third tube may have an inner diameter of 8 mm or less. The third tube may have an inner diameter of 7.75 mm or less. The third tube may have an inner diameter of 7.5 mm or less. The third tube may have an inner diameter of 7.25 mm or less. The third tube may have an inner diameter of 7 mm or less. The third tube may have an inner diameter of 6.75 mm or less. The third tube may have an inner diameter of 6.5 mm or less. The third tube may have an inner diameter of 6.25 mm or less. The third tube may have an inner diameter of 6 mm or less. The third tube may have an inner diameter of 5.75 mm or less. The third tube may have an inner diameter of 5.5 mm or less. The third tube may have an inner diameter of 5.25 mm or less. The third tube may have an inner diameter of 5 mm or less. The third tube may have an inner diameter of 4.75 mm or less. The third tube may have an inner diameter of 4.5 mm or less. The third tube may have an inner diameter of 4.25 mm or less. The third tube may have an inner diameter of 4 mm or less.

The third tube may have an inner diameter of 3mm to 8mm. The third tube may have an inner diameter between 3.25 mm and 8 mm. The third tube may have an inner diameter of 3.5mm to 8mm. The third tube may have an inner diameter between 3.75 mm and 8 mm. The third tube may have an inner diameter of 4mm to 8mm. The third tube may have an inner diameter between 4.25 mm and 5 mm. The third tube may have an inner diameter between 4.5 mm and 8 mm. The third tube may have an inner diameter between 4.75 mm and 8 mm. The third tube may have an inner diameter of 5mm to 8mm.

The third tube may have an inner diameter between 3 mm and 7.75 mm. The third tube may have an inner diameter of 3mm to 7.5mm. The third tube may have an inner diameter between 3 mm and 7.25 mm. The third tube may have an inner diameter of 3mm to 7mm. The third tube may have an inner diameter between 3 mm and 6.75 mm. The third tube may have an inner diameter of 3mm to 6.5mm. The third tube may have an inner diameter of 3mm to 6.25mm. The third tube may have an inner diameter of 3mm to 6mm. The third tube may have an inner diameter between 3 mm and 5.75 mm. The third tube may have an inner diameter of 3mm to 5.5mm. The third tube may have an inner diameter of 3mm to 5.25mm. The third tube may have an inner diameter of 3mm to 5mm. The third tube may have an inner diameter of 3mm to 4.75mm. The third tube may have an inner diameter of 3mm to 4.5mm. The third tube may have an inner diameter of 3mm to 4.25mm. The third tube may have an inner diameter of 3mm to 4mm.

The third tube may have an inner diameter between 3.3 mm and 6 mm. The third tube may have an inner diameter of 3.4mm to 5.5mm. The third tube may have an inner diameter of 3.5mm to 5mm. The third tube may have an inner diameter between 3.6 mm and 4.75 mm. The third tube may have an inner diameter of 3.7mm to 4.5mm. The third tube may have an inner diameter of 3.9mm to 4.25mm.

In one example, the third tube has an inner diameter of 4 mm.

The third tube may have a length of at least 4mm. The third tube may have a length of at least 4.25mm. The third tube may have a length of at least 4.5mm. The third tube may have a length of at least 4.75mm. The third tube may have a length of at least 5mm. The third tube may have a length of at least 5.25mm. The third tube may have a length of at least 5.5mm. The third tube may have a length of at least 5.75mm. The third tube may have a length of at least 6mm.

The third tube may have a length of 6mm or less. The third tube may have a length of 5.75 mm or less. The third tube may have a length of 5.5 mm or less. The third tube may have a length of 5.25 mm or less. The third tube may have a length of 5mm or less. The third tube may have a length of 4.75 mm or less. The third tube may have a length of 4.5 mm or less. The third tube may have a length of 4.25 mm or less.

The third tube may have a length of 4mm to 6mm. The third tube may have a length between 4.25mm and 6mm. The third tube may have a length of 4.5mm to 6mm. The third tube may have a length between 4.75mm and 6mm. The third tube may have a length of 5mm to 6mm. The third tube may have a length of 5.25mm to 6mm. The third tube may have a length of 5.5mm to 6mm. The third tube may have a length of 5.75mm to 6mm.

The third tube may have a length of 4mm to 5.75mm. The third tube may have a length of 4mm to 5.5mm. The third tube may have a length of 4mm to 5.25mm. The third tube may have a length of 4mm to 5mm. The third tube may have a length between 4mm and 4.75mm. The third tube may have a length of 4mm to 4.5mm. The third tube may have a length of 4mm to 4.25mm.

The third tube may have a length between 4.25mm and 5.75mm. The third tube may have a length of 4.25mm to 5.5mm. The third tube may have a length of 4.5mm to 5.75mm. The third tube may have a length of 4.5mm to 5.5mm. The third tube may have a length of 4.75mm to 5.5mm. The third tube may have a length of 4.5mm to 5.25mm. The third tube may have a length between 4.75mm and 5.25mm. In one example, the third tube has a length of 5 mm.

The aerosol-generating article may have a length of at least 35mm. The aerosol-generating article may have a length of at least 40mm. The aerosol-generating article may have a length of at least 45mm. The aerosol-generating article may have a length of at least 50mm. The aerosol-generating article may have a length of at least 55mm.

The aerosol-generating article may have a length of 60 mm or less. The aerosol-generating article may have a length of 55 mm or less. The aerosol-generating article may have a length of 50 mm or less. The aerosol-generating article may have a length of 45 mm or less. The aerosol-generating article may have a length of 40 mm or less.

The aerosol-generating article may have a length of 35mm to 60mm. The aerosol-generating article may have a length of 35mm to 55mm. The aerosol-generating article may have a length of 35mm to 50mm. The aerosol-generating article may have a length of 35mm to 45mm. The aerosol-generating article may have a length of 35mm to 40mm.

The aerosol-generating article may have a length of 40mm to 60mm. The aerosol-generating article may have a length of 45mm to 60mm. The aerosol-generating article may have a length of 50mm to 60mm. The aerosol-generating article may have a length of 55mm to 60mm.

The aerosol-generating article may have a length of 35mm to 55mm. The aerosol-generating article may have a length of 40mm to 55mm. The aerosol-generating article may have a length of 40mm to 50mm. The aerosol-generating article may have a length of 45mm to 50mm. The aerosol-generating article may have a length of 40mm to 45mm.

In one example, the aerosol-generating article has a length of 45 mm.

The ratio of the inner diameter of the first tube to the outer diameter of the first tube may be between 0.4 and 0.8. The ratio of the inner diameter of the first tube to the outer diameter of the first tube may be between 0.5 and 0.7.

The ratio of the inner diameter of the first tube to the outer diameter of the first tube may be 0.6.

The ratio of the inner diameter of the second tube to the outer diameter of the second tube may be between 0.1 and 0.5. The ratio of the inner diameter of the second tube to the outer diameter of the second tube may be 0.2-0.4.

The ratio of the inner diameter of the second tube to the outer diameter of the second tube may be 0.3.

The ratio of the inner diameter of the third tube to the outer diameter of the third tube may be 0.4-0.8. The ratio of the inner diameter of the third tube to the outer diameter of the third tube may be 0.5-0.7.

The ratio of the inner diameter of the third tube to the outer diameter of the third tube may be 0.6.

The first tube may have an outer diameter of at least 6mm. The first tube may have an outer diameter of at least 6.25mm. The first tube may have an outer diameter of at least 6.5 mm. The first tube may have an outer diameter of at least 6.75 mm. The first tube may have an outer diameter of at least 7 mm.

The first tube may have an outer diameter of 8 mm or less. The first tube may have an outer diameter of 7.75 mm or less. The first tube may have an outer diameter of 7.5 mm or less. The first tube may have an outer diameter of 7.25 mm or less. The first tube may have an outer diameter of 7 mm or less.

The first tube may have an outer diameter of 6mm to 8mm. The first tube may have an outer diameter between 6.25 mm and 8 mm. The first tube may have an outer diameter of 6.5mm to 8mm. The first tube may have an outer diameter between 6.75 mm and 8 mm. The first tube may have an outer diameter of 7mm to 8mm. The first tube may have an outer diameter between 7.25 mm and 8 mm. The first tube may have an outer diameter of 7.5mm to 8mm. The first tube may have an outer diameter between 7.75 mm and 8 mm.

The first tube may have an outer diameter between 6 mm and 7.75 mm. The first tube may have an outer diameter between 6 mm and 7.5 mm. The first tube may have an outer diameter between 6 mm and 7.25 mm. The first tube may have an outer diameter of 6mm to 7mm. The first tube may have an outer diameter between 6 mm and 6.75 mm. The first tube may have an outer diameter of 6mm to 6.5mm. The first tube may have an outer diameter between 6 mm and 6.25 mm.

The first tube may have an outer diameter between 6.25 mm and 7.75 mm. The first tube may have an outer diameter of 6.5mm to 7.5mm. The first tube may have an outer diameter between 6.75mm and 7.25mm.

The first tube may have an outer diameter of 7mm.

The ratio of the length of the first tube to the inner diameter of the first tube may be between 0.75 and 1.75. The ratio of the length of the first tube to the inner diameter of the first tube may be between 1 and 1.5.

A ratio of the length of the first tube to the inner diameter of the first tube may be 1.25.

The ratio of the length of the second tube to the inner diameter of the second tube may be 2-3. The ratio of the length of the second tube to the inner diameter of the second tube may be between 2.25 and 2.75.

The ratio of the length of the second tube to the inner diameter of the second tube may be 2.5.

The ratio of the length of the third tube to the inner diameter of the third tube may be between 0.75 and 1.75. The ratio of the length of the third tube to the inner diameter of the third tube may be between 1 and 1.5.

A ratio of the length of the third tube to the inner diameter of the third tube may be 1.25.

The first tube and the second tube may be arranged such that they are coaxial with each other along their longitudinal axes. The first tube and the third tube may be arranged such that they are coaxial with each other along their longitudinal axes. The second tube and the third tube may be arranged such that they are coaxial with each other along their longitudinal axes. In one embodiment, the first tube, the second tube and the third tube may be arranged such that they are coaxial with each other along their longitudinal axes.

The aerosol-generating substrate may comprise a gel. A gel composition may include at least one gelling agent. The gel composition may contain at least one alkaloid compound. The gel composition may contain at least one cannabinoid compound. The gel composition may contain at least one aerosol former. In one embodiment, the gel composition includes at least one gelling agent, at least one of an alkaloid compound and a cannabinoid compound, and an aerosol former.

Advantageously, providing an aerosol-forming substrate comprising a gel composition may be desirable because it provides a uniform substrate capable of highly consistent aerosol generation. In addition, gel aerosol-forming substrates may have the ability to generate aerosols at lower temperatures than tobacco-containing aerosol-forming substrates. This may provide more efficient generation of the aerosol. Furthermore, this may advantageously reduce the need to cool the aerosol before it reaches the consumer.

Aerosol-forming substrates may comprise an annular plug of porous media loaded with a gel composition. The porous medium may comprise at least one of cellulose acetate tow, crimped viscose, and crimped cotton.

The aerosol-generating article may comprise an upstream element. The upstream element may be located upstream of the aerosol-forming substrate. The upstream element may abut the aerosol-forming substrate. The upstream element may have a high withdrawal resistance (RTD). The upstream element may be formed from a material that provides a high RTD. The upstream element may include filtering material. The upstream element may include an annular plug. The upstream element may include an annular plug of fibrous filtration material.

Providing an upstream element may advantageously protect the aerosol-forming substrate and prevent the user from coming into direct contact with the aerosol-forming substrate.

Upstream elements can be used to provide greater control over the overall resistance to withdrawal (RTD) of the aerosol-generating article. In particular, the upstream element advantageously has a potential reduction in RTD due to evaporation of the aerosol-forming substrate during use or due to inclusion of other elements with relatively low withdrawal resistance in the aerosol-generating article. can be used to supplement For example, in embodiments of the invention that include an intermediate space that contributes substantially no RTD to the overall aerosol-generating article, the upstream element is used to generate aerosol so that an acceptable level of RTD can still be provided. An RTD can be added to the item.

Advantageously, the upstream element can provide an increase in overall RTD without affecting the properties of the aerosol due to its position upstream of the aerosol-forming substrate. Where the desired level of RTD can largely be provided due to the upstream element, this allows the use of downstream elements that provide minimal filtration of the aerosol. Thus, the aerosol-generating article can optimize aerosol delivery from the gel composition to the consumer, while still maintaining an optimal level of RTD throughout the smoking experience.

Alternatively or additionally, the upstream element is advantageously adapted to compensate for the length reduction of other elements of the aerosol-generating article so that a consistent overall length of the aerosol-generating article can be maintained. be able to. This may advantageously allow the aerosol-forming substrate to be in an optimal position for heating when the aerosol-generating article is inserted into the aerosol-generating device. Compensation for this length can be provided without affecting the properties of the aerosol.

Additionally, the upstream element may advantageously provide a more uniform appearance to the upstream end of the aerosol-generating article.

In embodiments including a recess extending from the upstream end of the aerosol-generating article through the upstream element, the upstream element may include a longitudinal opening for receiving the recess. For example, the upstream element may have an annular shape.

The aerosol-generating article may comprise a ventilation zone.

A ventilation zone may include one or more rows of ventilation perforations. One or more rows of vent perforations may be formed through the wall of at least one of the first, second and third tubes. In one embodiment, one or more rows of vent perforations are formed through the wall of the third tube. In embodiments that include a wrapper, one or more rows of vent perforations are formed through the wrapper. Advantageously, one or more rows of vent perforations provide a venting effect that can enhance cooling of the vaporized volatile compounds of the aerosol-forming substrate, thereby improving aerosol nucleation.

A ventilation zone may include only one row of ventilation perforations. Advantageously, it may be possible to further enhance aerosol nucleation by concentrating the cooling effect provided by the ventilation to a short portion of the aerosol-generating article. This is because faster and more dramatic cooling of the stream of volatilized compounds is expected to particularly favor the formation of new nuclei of aerosol particles.

One or more rows of vent perforations may be circumferentially disposed about the wall of at least one of the first, second and third tubes. If the vent zone includes more than one row of vent perforations, the rows of vent perforations are longitudinally spaced from each other along at least one of the first, second, and third tubes. may be intervening. As an example, adjacent rows of vent perforations may be longitudinally spaced apart from each other by a distance of about 0.25 millimeters to 0.75 millimeters.

At least one of the vent perforations may have an equivalent diameter of at least 100 μm. At least one of the vent perforations may have an equivalent diameter of at least 150 μm. At least one of the vent perforations may have an equivalent diameter of at least 200 μm.

At least one of the vent perforations may have an equivalent diameter of less than 500 μm. At least one of the vent perforations may have an equivalent diameter of less than 450 μm. The term "equivalent diameter" is used herein to mean the diameter of a circle having the same surface area as the cross-section of the vent hole. The cross-section of the ventilation perforations may have any suitable shape. In one embodiment, the vent perforations have a circular cross-sectional shape.

The ventilation perforations may be of uniform size. Alternatively, the vent perforations may vary in size. By varying the number and size of the vent perforations, the amount of ambient air that enters the first, second, and/or third tubes when the consumer sucks on the aerosol-generating article during use. It is possible to adjust. As such, it is advantageously possible to adjust the ventilation level of the aerosol-generating article.

Vent perforations may be performed using any suitable technique, such as laser technology, mechanical perforation of the first tube, second tube, and/or third tube as part of the aerosol-generating article, or other can be formed by pre-perforating the first tube, the second tube, and/or the third tube before being combined with the elements of to form the aerosol-generating article. The vent perforations are preferably formed by on-line laser perforation.

The distance between the ventilation zone and the upstream end of the aerosol-generating article may be less than 50mm. The distance between the ventilation zone and the upstream end of the aerosol-generating article may be less than 45mm. The distance between the ventilation zone and the upstream end of the aerosol-generating article may be less than 40mm.

Preferably, the distance between the ventilation zone and the upstream end of the aerosol-generating article is at least 12 mm. The distance between the ventilation zone and the upstream end of the aerosol-generating article may be at least 15 mm. The distance between the ventilation zone and the upstream end of the aerosol-generating article may be at least 20mm. Preferably, the distance between the ventilation zone and the upstream end of the aerosol-generating article may be at least 25mm.

The distance between the ventilation zone and the downstream edge of the aerosol-forming substrate may be at least 2 mm. The distance between the ventilation zone and the downstream edge of the aerosol-forming substrate may be at least 4 mm. The distance between the ventilation zone and the downstream edge of the aerosol-forming substrate may be at least 5 mm. The distance between the ventilation zone and the downstream edge of the aerosol-forming substrate may be at least 10 mm. The distance between the venting zone and the downstream end of the aerosol-forming substrate may be at least about 15 mm.

The distance between the ventilation zone and the downstream end of the aerosol-forming substrate may be less than 35 mm. The distance between the ventilation zone and the downstream end of the aerosol-forming substrate may be less than 30mm. The distance between the ventilation zone and the downstream edge of the aerosol-forming substrate may be less than 25 mm.

In practice, the ventilation zone comprises a cavity defined within the aerosol-generating article, an upstream sub-cavity extending longitudinally from the upstream end of the aerosol-generating article to the location of the ventilation zone, and an upstream sub-cavity extending longitudinally from the location of the ventilation zone to the downstream end of the aerosol-generating article. and a downstream sub-cavity extending longitudinally into the cavity. Without wishing to be bound by theory, in the upstream sub-cavity the volatilized compounds of the aerosol stream travel slowly downstream along the cavity, transferring some of the heat to e.g. the peripheral wall of the third tube. It is understood to be cooled by yielding. The aerosol particles thus begin to nucleate. On the other hand, in the downstream sub-cavity, the aerosol stream and ventilation air are rapidly mixed, which rapidly cools the volatilized compounds of the aerosol stream, so that as the aerosol travels downstream, new aerosol particles are formed. Favors nucleation and growth of existing aerosol particles.

The aerosol-generating article may comprise a recess extending from the upstream end of the aerosol-generating article. A recess may extend through the upstream element. The recess may extend through at least a portion of the aerosol-forming substrate.

Providing a recess may advantageously allow the use of an internal heater, such as a pin or blade heater, to heat the aerosol-generating article. This can facilitate more efficient heating of the aerosol-forming substrate. The inclusion of recesses is particularly advantageous because gel-containing aerosol-forming substrates typically have higher densities than tobacco-containing aerosol-forming substrates. As a result, it is impractical to directly insert a pin or blade heater into an aerosol-forming substrate containing gel compared to an aerosol-forming substrate containing tobacco. Additionally, providing a recess prevents the heater from contacting the gel aerosol-forming substrate, which can help keep the heater clean.

The recess may be defined by a longitudinal opening extending through the upstream element and a longitudinal opening extending through at least a portion of the aerosol-forming substrate. The longitudinal opening extending through the upstream element and the longitudinal opening extending through at least a portion of the aerosol-forming substrate may have substantially the same diameter and may be substantially aligned.

The recess may have any cross-sectional shape. The recess may have a constant cross-sectional shape. The shape of the recess may be configured to correspond to the shape of the heater of the aerosol generating device used with the aerosol generating article. The recess may have a circular cross-sectional shape. A recess having a circular cross-sectional shape may be suitable when the heater is a pin heater. The recess may have an oval or rectangular shape. A recess having an elliptical or rectangular cross-sectional shape may be suitable when the heater is a blade heater. The recess preferably has a circular cross-sectional shape.

The recess may be centrally disposed along the longitudinal axis of the aerosol-generating article. This may advantageously simplify inserting the aerosol-generating article into the aerosol-generating device, as the orientation of the aerosol-generating device is not critical. Furthermore, centrally locating the recess may advantageously ensure even heating of the aerosol-forming substrate.

The recess may have any diameter. Preferably, the recess has a diameter that is the same as or slightly larger than the diameter of the heater of the aerosol generating device used with the aerosol generating article.

The diameter of the recess may be from about 0.5 mm to about 10 mm. The diameter of the recess may be from about 1 mm to about 8 mm, or from about 2 mm to about 6 mm.

The recess can have any length. Preferably, the recess has a length that is the same as or slightly greater than the length of the heater of the aerosol generating device used with the aerosol generating article.

The length of the recess may be from about 5 millimeters to about 30 millimeters. For example, the length of the recess may be from about 10 millimeters to about 25 millimeters, or from about 15 millimeters to about 20 millimeters.

The recess may extend through the entire length of the aerosol-forming substrate. In this case, the recess may extend further downstream of the downstream end of the aerosol-forming substrate. Alternatively, in this case the recess may extend to the downstream end of the aerosol-forming substrate but not further downstream.

Preferably, the gel composition comprises an alkaloid compound, or cannabinoid compound, or both alkaloid and cannabinoid compounds, an aerosol former, and at least one gelling agent. Preferably, the at least one gelling agent forms a solid medium, glycerol is dispersed in the solid medium and the alkaloid or cannabinoid is dispersed in the glycerol. Preferably, the gel composition is in a stable gel phase.

Advantageously, a stable gel composition comprising nicotine provides a predictable composition form during storage or transition from manufacture to consumer. A stable gel composition comprising nicotine substantially maintains its shape. A stable gel composition comprising nicotine does not substantially release a liquid phase upon storage or transit from manufacture to consumer. A stable gel composition containing nicotine may offer a simple consumable design. The consumable may not need to be designed to contain liquids, so a wider range of materials and container constructions may be contemplated.

The gel compositions described herein may be combined with an aerosol generating device to provide nicotine aerosol to the lungs at inhalation or airflow velocities within the inhalation or airflow velocities of conventional smoking methods. . An aerosol generator may continuously heat the gel composition. A consumer can take multiple inhalations or "puffs", each "puff" delivering a quantity of nicotine aerosol. The gel composition is capable of delivering a high nicotine/total particulate matter (TPM) aerosol to the consumer upon heating, preferably in a continuous manner.

The phrase "stable gel phase" or "stable gel" refers to a gel that substantially maintains its shape and mass when exposed to various environmental conditions. A stable gel is substantially incapable of releasing or absorbing water (sweat) when exposed to standard temperatures and pressures while varying relative humidity from about 10 percent to about 60 percent. For example, a stable gel can substantially maintain its shape and mass when exposed to standard temperatures and pressures while varying relative humidity from about 10 percent to about 60 percent.

A gel composition includes an alkaloid compound, or a cannabinoid compound, or both an alkaloid compound and a cannabinoid compound. A gel composition may include one or more alkaloids. A gel composition may contain one or more cannabinoids. A gel composition may include a combination of one or more alkaloids and one or more cannabinoids.

The term "alkaloid compound" means any one class of naturally occurring organic compounds containing one or more basic nitrogen atoms. Generally, alkaloids contain at least one nitrogen atom that is in an amine-type structure. This nitrogen atom or another nitrogen atom within the molecule of the alkaloid compound can be active as a base in acid-base reactions. Most alkaloid compounds have one or more of their nitrogen atoms as part of a cyclic system such as a heterocycle. In nature, alkaloid compounds are found primarily in plants, and are particularly common in certain families of flowering plants. However, some alkaloid compounds are found in animal species and fungi. In this disclosure, the term "alkaloid compound" refers to both naturally occurring and synthetically produced alkaloid compounds.

The gel composition preferably comprises an alkaloid compound selected from the group consisting of nicotine, anatabine, and combinations thereof.

Preferably, the gel composition contains nicotine.

The term "nicotine" refers to nicotine and nicotine derivatives such as free base nicotine, nicotine salts, and the like.

The term "cannabinoid compound" means any one class of naturally occurring compounds found in parts of the cannabis plant Cannabis sativa, Cannabis indica, and Cannabis ruderalis. means Cannabinoid compounds are particularly concentrated in female flower heads. Cannabinoid compounds that occur naturally in cannabis plants include cannabidiol (CBD) and tetrahydrocannabinol (THC). In this disclosure, the term "cannabinoid compound" is used to describe both naturally occurring and synthetically produced cannabinoid compounds.

The gel contains cannabidiol (CBD), tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), cannabidiolic acid (CBDA), cannabinol (CBN), cannabigerol (CBG), cannabichromene (CBC), cannabidivarin (CBL), cannabivarin (CBV), tetrahydrocannabivarin (THCV), cannabidivarin (CBDV), cannabichromevarin (CBCV), cannabigerovarin (CBGV), cannabigerol monomethyl ether (CBGM), Cannabinoid compounds selected from the group consisting of cannabinoid (CBE), cannabicitran (CBT), and combinations thereof may be included.

The gel composition may preferably comprise a cannabinoid compound selected from the group consisting of cannabidiol (CBD), THC (tetrahydrocannabinol) and combinations thereof.

The gel preferably contains cannabidiol (CBD).

The gel composition may contain nicotine and cannabidiol (CBD).

Gel compositions may include nicotine, cannabidiol (CBD), and THC (tetrahydrocannabinol).

The gel composition contains from about 0.5 weight percent to about 10 weight percent alkaloid compounds, or from about 0.5 weight percent to about 10 weight percent cannabinoid compounds, or from about 0.5 weight percent to about 10 weight percent in total. It preferably contains a percentage of both alkaloid and cannabinoid compounds. The gel composition contains from about 0.5 weight percent to about 5 weight percent alkaloid compounds, or from about 0.5 weight percent to about 5 weight percent cannabinoid compounds, or from about 0.5 weight percent to about 5 weight percent in total. Percentages of both alkaloid and cannabinoid compounds may be included. The gel composition comprises from about 1 weight percent to about 3 weight percent alkaloid compound, or from about 1 weight percent to about 3 weight percent cannabinoid compound, or from about 1 weight percent to about 3 weight percent total alkaloid compound and cannabinoid. It is preferred to include both compounds. The gel composition comprises from about 1.5 weight percent to about 2.5 weight percent alkaloid compounds, or from about 1.5 weight percent to about 2.5 weight percent cannabinoid compounds, or a total amount of about 1.5 weight percent Preferably, it may contain from to about 2.5 weight percent of both alkaloid and cannabinoid compounds. The gel composition may preferably contain about 2 weight percent alkaloid compounds, or about 2 weight percent cannabinoid compounds, or a total amount of about 2 weight percent both alkaloid and cannabinoid compounds. The alkaloid compound component of the gel formulation can be the most volatile component of the gel formulation. In some embodiments, water can be the most volatile component of the gel formulation and the alkaloid compound component of the gel formulation can be the second most volatile component of the gel formulation. The cannabinoid compound component of the gel formulation can be the most volatile component of the gel formulation. In some embodiments, water can be the most volatile component of the gel formulation and the alkaloid compound component of the gel formulation can be the second most volatile component of the gel formulation.

Preferably nicotine is included in the gel composition. Nicotine can be added to the composition in free base form or salt form. The gel composition comprises from about 0.5 weight percent to about 10 weight percent nicotine, or from about 0.5 weight percent to about 5 weight percent nicotine. Preferably, the gel composition comprises from about 1 weight percent to about 3 weight percent nicotine, or from about 1.5 weight percent to about 2.5 weight percent nicotine, or about 2 weight percent nicotine. The nicotine component of the gel formulation may be the most volatile component of the gel formulation. In some embodiments, water can be the most volatile component of the gel formulation and the nicotine component of the gel formulation can be the second most volatile component of the gel formulation.

The gel composition further comprises an aerosol former. Ideally, the aerosol former is substantially resistant to thermal degradation at the operating temperatures of the associated aerosol generator. Suitable aerosol formers include polyhydric alcohols (such as triethylene glycol, 1,3-butanediol, glycerin), esters of polyhydric alcohols (such as glycerol monoacetate, diacetate, or triacetate), and monocarboxylic acids, Dicarboxylic acids, or aliphatic esters of polycarboxylic acids, such as dimethyl dodecanedioate, dimethyl tetradecanedioate, etc., include, but are not limited to. The polyhydric alcohol or mixtures thereof can be triethylene glycol, 1,3-butanediol and one or more of glycerin (glycerol or propane-1,2,3-triol) or polyethylene glycol. The aerosol former is preferably glycerol.

The gel composition contains the bulk of the aerosol former. The gel composition may comprise a mixture of water and an aerosol former, with the aerosol former forming the majority (by weight) of the gel composition. The aerosol former can form at least about 50 weight percent gel composition. The aerosol former can form at least about 60 weight percent, or at least about 65 weight percent, or at least about 70 weight percent of the gel composition. The aerosol former can form about 70 weight percent to about 80 weight percent of the gel composition. The aerosol former can form about 70 weight percent to about 75 weight percent of the gel composition.

A gel composition may comprise a majority of glycerol. The gel composition may comprise a mixture of water and glycerol, with glycerol forming the majority (by weight) of the gel composition. Glycerol can form at least about 50 weight percent of the gel composition. Glycerol may form at least about 60 weight percent, or at least about 65 weight percent, or at least about 70 weight percent of the gel composition. Glycerol may form from about 70 weight percent to about 80 weight percent of the gel composition. Glycerol may form from about 70 weight percent to about 75 weight percent of the gel composition.

The gel composition further comprises at least one gelling agent. The gel composition preferably comprises gelling agents in a total amount ranging from about 0.4 weight percent to about 10 weight percent. More preferably, the composition comprises gelling agent in the range of about 0.5 weight percent to about 8 weight percent. More preferably, the composition comprises in the range of about 1 weight percent to about 6 weight percent gelling agent. More preferably, the composition comprises in the range of about 2 weight percent to about 4 weight percent gelling agent. More preferably, the composition comprises in the range of about 2 weight percent to about 3 weight percent gelling agent.

The term "gelling agent" is used to homogeneously form a solid medium or support matrix when added to a mixture of 50 weight percent water/50 weight percent glycerol in an amount of about 0.3 weight percent. Refers to a compound that leads to a gel. Gelling agents include, but are not limited to, hydrogen bonding cross-linking gelling agents, and ionically cross-linking gelling agents.

A gelling agent may comprise one or more biopolymers. Biopolymers may be formed of polysaccharides.

Examples of biopolymers include gellan gum (preferably natural gellan gum, low acyl gellan gum, high acyl gellan gum, and low acyl gellan gum), xanthan gum, alginate (alginic acid), agar, guar gum, and the like. It may be preferred that the composition comprises xanthan gum. The composition may contain two biopolymers. The composition may contain three biopolymers. The composition may comprise substantially equal weights of the two biopolymers. The composition may comprise substantially equal weights of the three biopolymers.

Preferably, the gel composition comprises at least about 0.2 weight percent hydrogen-bonding cross-linked gelling agent. Alternatively or additionally, the gel composition preferably comprises at least about 0.2 weight percent of an ionically crosslinked gelling agent. Most preferably, the gel composition comprises at least about 0.2 weight percent hydrogen bonding cross-linked gelling agent and at least about 0.2 weight percent ionically cross-linked gelling agent. The gel composition comprises from about 0.5 weight percent to about 3 weight percent hydrogen bonding cross-linked gelling agent and from about 0.5 weight percent to about 3 weight percent ionically cross-linked gelling agent, or from about 1 weight percent to about It may contain 2 weight percent hydrogen bonding cross-linked gelling agent and from about 1 weight percent to about 2 weight percent ionically cross-linked gelling agent. The hydrogen-bonding cross-linking gelling agent and the ionically cross-linking gelling agent may be present in substantially equal amounts in the gel composition.

The term "hydrogen-bonding cross-linking gelling agents" refers to gelling agents that form non-covalent or physical cross-linking via hydrogen bonding. Hydrogen bonding is a type of electrostatic dipole-dipole attraction between molecules rather than covalent bonding to hydrogen atoms. This results from the attractive force between a hydrogen atom covalently bonded to another extremely electronegative atom, such as an N, O, or F atom.

The hydrogen-bonding cross-linking gelling agent may comprise one or more of galactomannan, gelatin, agarose, or konjac gum, or agar. It may be preferred that the hydrogen-bonding cross-linking gelling agent comprises agar.

Preferably, the gel composition comprises hydrogen bonding cross-linking gelling agents in the range of about 0.3 weight percent to about 5 weight percent. Preferably, the composition comprises hydrogen bonding cross-linking gelling agents in the range of about 0.5 weight percent to about 3 weight percent. Preferably, the composition comprises hydrogen bonding cross-linking gelling agents in the range of about 1 weight percent to about 2 weight percent.

The gel composition may contain galactomannan in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the galactomannan can range from about 0.5 weight percent to about 3 weight percent. Preferably, the galactomannan can range from about 0.5 weight percent to about 2 weight percent. Preferably, the galactomannan can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain gelatin in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the gelatin can range from about 0.5 weight percent to about 3 weight percent. Preferably, the gelatin can range from about 0.5 weight percent to about 2 weight percent. Preferably, the gelatin can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain agarose in the range of about 0.2 weight percent to about 5 weight percent. Preferably, agarose can range from about 0.5 weight percent to about 3 weight percent. Preferably, agarose can range from about 0.5 weight percent to about 2 weight percent. Preferably, agarose can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain konjac gum in the range of about 0.2 weight percent to about 5 weight percent. Preferably, konjac gum can be in the range of about 0.5 weight percent to about 3 weight percent. Preferably, konjac gum can be in the range of about 0.5 weight percent to about 2 weight percent. Preferably, konjac gum can be in the range of about 1 weight percent to about 2 weight percent.

The gel composition may contain agar in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the agar can range from about 0.5 weight percent to about 3 weight percent. Preferably, the agar can range from about 0.5 weight percent to about 2 weight percent. Preferably, the agar can range from about 1 weight percent to about 2 weight percent.

The term "ionically cross-linked gelling agent" refers to a gelling agent that forms non-covalent or physical cross-links through ionic bonds. Ionic cross-linking involves the association of polymer chains through non-covalent interactions. A crosslinked network is formed when multivalent molecules with opposite charges are electrostatically attracted to each other to produce a crosslinked polymer network.

Ionically crosslinked gelling agents may include low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate. Preferably, the ionically crosslinked gelling agent may comprise low acyl gellan.

The gel composition may contain the ionically crosslinked gelling agent in the range of about 0.3 weight percent to about 5 weight percent. Preferably, the composition comprises an ionically crosslinked gelling agent in the range of about 0.5 weight percent to about 3 weight percent. Preferably, the composition comprises an ionically crosslinked gelling agent in the range of about 1 weight percent to about 2 weight percent.

The gel composition may contain low acyl gellan in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the low acyl gellan can range from about 0.5 weight percent to about 3 weight percent. Preferably, the low acyl gellan can range from about 0.5 weight percent to about 2 weight percent. Preferably, the low acyl gellan can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain pectin in the range of about 0.2 weight percent to about 5 weight percent. Preferably, pectin can range from about 0.5 weight percent to about 3 weight percent. Preferably, pectin can range from about 0.5 weight percent to about 2 weight percent. Preferably, pectin can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain kappa carrageenan in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the kappa-carrageenan can range from about 0.5 weight percent to about 3 weight percent. Preferably, the kappa-carrageenan can range from about 0.5 weight percent to about 2 weight percent. Preferably, the kappa carrageenan can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain iota carrageenan in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the iota carrageenan can range from about 0.5 weight percent to about 3 weight percent. Preferably, the iota carrageenan can range from about 0.5 weight percent to about 2 weight percent. Preferably, the iota carrageenan can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain alginate in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the alginate can range from about 0.5 weight percent to about 3 weight percent. Preferably, the alginate can range from about 0.5 weight percent to about 2 weight percent. Preferably, the alginate can range from about 1 weight percent to about 2 weight percent.

The gel composition may comprise the hydrogen bonding cross-linking gelling agent and the ionically cross-linking gelling agent in a ratio of about 3:1 to about 1:3. Preferably, the gel composition may comprise the hydrogen bonding cross-linking gelling agent and the ionically cross-linking gelling agent in a ratio of about 2:1 to about 1:2. Preferably, the gel composition may comprise the hydrogen bonding cross-linking gelling agent and the ionically cross-linking gelling agent in a ratio of about 1:1.

The gel composition may further contain a thickening agent. The thickening agent in combination with the hydrogen-bonding cross-linking gelling agent and the ionically cross-linking gelling agent surprisingly supports solid media and improves gel composition even when the gel composition contains high levels of glycerol. seem to maintain.

The term "thickening agent" is used when uniformly added in an amount of 0.3 weight percent into a mixture of 50 weight percent water/50 weight percent glycerin at 25°C without resulting in the formation of a gel. Refers to a compound that increases viscosity so that the mixture remains or remains fluid. Preferably, the thickener has a shear rate of 0.1 s-1 when added uniformly in an amount of 0.3 weight percent into a mixture of 50 weight percent water/50 weight percent glycerin at 25°C. at increasing the viscosity to at least 50 cPs, preferably at least 200 cPs, preferably at least 500 cPs, preferably at least 1000 cPs, without resulting in the formation of a gel, wherein the mixture remains fluid. , or refers to a compound that remains fluid. Preferably, the thickening agent does not result in gel formation when added homogeneously in an amount of 0.3 weight percent to a mixture of 50 weight percent water/50 weight percent glycerol at 25°C. Refers to compounds that, at a shear rate of 0.1 s-1, increase the viscosity at least 2-fold, at least 5-fold, at least 10-fold, or at least 100-fold greater than before addition, and the mixture remains or is preserved as a fluid.

Viscosity values recited herein may be measured using a Brookfield RVT viscometer with a disc type RV#2 spindle rotating at 25° C. at a speed of 6 revolutions per minute (rpm).

The gel composition preferably contains a thickening agent in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the composition comprises a thickening agent in the range of about 0.5 weight percent to about 3 weight percent. Preferably, the composition comprises a thickening agent in the range of about 0.5 weight percent to about 2 weight percent. Preferably, the composition includes a thickening agent in the range of about 1 weight percent to about 2 weight percent.

Thickeners may include one or more of xanthan gum, carboxymethylcellulose, microcrystalline cellulose, methylcellulose, gum arabic, guar gum, lambda carrageenan, or starch. Preferably, the thickening agent may include xanthan gum.

The gel composition may contain xanthan gum in the range of about 0.2 weight percent to about 5 weight percent. Preferably, xanthan gum can range from about 0.5 weight percent to about 3 weight percent. Preferably, xanthan gum can range from about 0.5 weight percent to about 2 weight percent. Preferably, xanthan gum can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain carboxymethylcellulose in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the carboxymethylcellulose can range from about 0.5 weight percent to about 3 weight percent. Preferably, the carboxymethylcellulose can range from about 0.5 weight percent to about 2 weight percent. Preferably, the carboxymethylcellulose can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain microcrystalline cellulose in the range of about 0.2 weight percent to about 5 weight percent. Preferably, microcrystalline cellulose can range from about 0.5 weight percent to about 3 weight percent. Preferably, microcrystalline cellulose can range from about 0.5 weight percent to about 2 weight percent. Preferably, microcrystalline cellulose can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain methylcellulose in a range from about 0.2 weight percent to about 5 weight percent. Preferably, the methylcellulose can range from about 0.5 weight percent to about 3 weight percent. Preferably, the methylcellulose can range from about 0.5 weight percent to about 2 weight percent. Preferably, the methylcellulose can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain gum arabic in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the gum arabic can range from about 0.5 weight percent to about 3 weight percent. Preferably, gum arabic may be in the range of about 0.5 weight percent to about 2 weight percent. Preferably, the gum arabic can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain guar gum in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the guar gum can range from about 0.5 weight percent to about 3 weight percent. Preferably, guar gum can range from about 0.5 weight percent to about 2 weight percent. Preferably, guar gum can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain lambda carrageenan in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the lambda carrageenan can range from about 0.5 weight percent to about 3 weight percent. Preferably, lambda carrageenan can range from about 0.5 weight percent to about 2 weight percent. Preferably, lambda carrageenan can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain starch in the range of about 0.2 weight percent to about 5 weight percent. Preferably, the starch can range from about 0.5 weight percent to about 3 weight percent. Preferably, the starch can range from about 0.5 weight percent to about 2 weight percent. Preferably, the starch can range from about 1 weight percent to about 2 weight percent.

The gel composition may further contain divalent cations. Preferably, the divalent cations include calcium ions such as calcium lactate in solution. Divalent cations, such as calcium ions, can aid gel formation in compositions containing gelling agents, such as, for example, ionically crosslinked gelling agents. Ionic effects may assist gel formation. Divalent cations can be present in the gel composition in the range of about 0.1 to about 1 weight percent, or about 0.5 weight percent to about 1 weight percent.

The gel composition may further contain an acid. Acids may include carboxylic acids. Carboxylic acids may contain a ketone group. Preferably, the carboxylic acid may comprise a ketone group having less than about 10 carbon atoms, such as levulinic acid or lactic acid, or less than about 6 carbon atoms or less than about 4 carbonic acid atoms. Preferably, the carboxylic acid has 3 carbon atoms (such as lactic acid). Lactic acid surprisingly improves the stability of the gel composition over even similar carboxylic acids. Carboxylic acids may aid in gel formation. The carboxylic acid may reduce changes in alkaloid compound concentration, or cannabinoid compound concentration, or both alkaloid and cannabinoid compound concentrations within the gel composition during storage. Carboxylic acids can reduce changes in nicotine concentration within the gel composition during storage.

The gel composition may contain carboxylic acid in the range of about 0.1 weight percent to about 5 weight percent. Preferably, the carboxylic acid can range from about 0.5 weight percent to about 3 weight percent. Preferably, the carboxylic acid can range from about 0.5 weight percent to about 2 weight percent. Preferably, the carboxylic acid can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain lactic acid in the range of about 0.1 weight percent to about 5 weight percent. Preferably, lactic acid can range from about 0.5 weight percent to about 3 weight percent. Preferably, lactic acid can range from about 0.5 weight percent to about 2 weight percent. Preferably, lactic acid can range from about 1 weight percent to about 2 weight percent.

The gel composition may contain levulinic acid in the range of about 0.1 weight percent to about 5 weight percent. Preferably, the levulinic acid can range from about 0.5 weight percent to about 3 weight percent. Preferably, the levulinic acid can range from about 0.5 weight percent to about 2 weight percent. Preferably, the levulinic acid can range from about 1 weight percent to about 2 weight percent.

The gel composition preferably contains some water. A gel composition is more stable if the composition contains some water. Preferably, the gel composition comprises at least about 1 weight percent, or at least about 2 weight percent, or at least about 5 weight percent water. Preferably, the gel composition comprises at least about 10 weight percent or at least about 15 weight percent water.

Preferably, the gel composition contains from about 8 weight percent to about 32 weight percent water. Preferably, the gel composition contains from about 15 weight percent to about 25 weight percent water. Preferably, the gel composition contains from about 18 weight percent to about 22 weight percent water. The gel composition preferably contains about 20 weight percent water.

Preferably, the aerosol-forming substrate contains from about 150 mg to about 350 mg of gel composition.

The invention is defined in the claims. However, the following provides a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more of the features of other examples, embodiments, or aspects described herein.

Example 1:
An aerosol-generating article for generating an inhalable aerosol upon heating, the aerosol-generating article comprising a mouthpiece assembly including a first tube, a second tube, and a third tube; and an aerosol-forming substrate. wherein the first tube abuts the downstream end face of the second tube, the third tube abuts the upstream end face of the second tube, and the inner diameter of the second tube is equal to that of the first tube wherein the inner diameter of the second tube is less than the inner diameter of the third tube and the inner diameter of the first tube is at least 3 mm.
Example 2:
The aerosol-generating article of Example 1, wherein the inner diameter of the first tube is greater than the inner diameter of the third tube.
Example 3:
The aerosol-generating article of Example 1 or Example 2, wherein the first tube is a cellulose acetate tube.
Example 4:
An aerosol-generating article according to any of the preceding examples, wherein the second tube is a cellulose acetate tube.
Example 5:
An aerosol-generating article according to any of the preceding examples, wherein the third tube is a cellulose acetate tube.
Example 6:
An aerosol-generating article according to any of the preceding examples, comprising a fourth tube positioned within an opening defined by the third tube.
Example 7:
The aerosol-generating article of Example 6, wherein the fourth tube is formed from a material that is substantially impermeable to air.
Example 8:
The aerosol-generating article of Example 7, wherein the fourth tube is formed from cardboard.
Example 9:
An aerosol-generating article according to any of the preceding examples, comprising a wrapper provided over the exterior surfaces of the first tube, the second tube, and the third tube.
Example 10:
The aerosol-generating article of Example 9, wherein the wrapper is formed from a non-porous material.
Example 11:
An aerosol-generating article according to any of the preceding examples, wherein the ratio of the inner diameter of the first tube to the inner diameter of the second tube is 1.2-5.
Example 12:
The aerosol-generating article of Example 11, wherein the ratio of the inner diameter of the first tube to the inner diameter of the second tube is 1.8-2.5.
Example 13:
An aerosol-generating article according to any of the preceding examples, wherein the ratio of the inner diameter of the first tube to the inner diameter of the third tube is 0.5-2.
Example 14:
The aerosol-generating article of Example 13, wherein the ratio of the inner diameter of the first tube to the inner diameter of the third tube is from 0.8 to 1.2.
Example 15:
An aerosol-generating article according to any of the preceding examples, wherein the ratio of the inner diameter of the third tube to the inner diameter of the second tube is 1.5-5.
Example 16:
The aerosol-generating article of Example 15, wherein the ratio of the inner diameter of the third tube to the inner diameter of the second tube is 1.8-2.5.
Example 17:
An aerosol-generating article according to any of the preceding examples, wherein the first tube has an inner diameter of 3 mm to 8 mm.
Example 18:
The aerosol generating article of Example 17, wherein the first tube has an inner diameter of 4 mm.
Example 19:
An aerosol-generating article according to any preceding example, wherein the first tube has a length of 4 mm to 6 mm.
Example 20:
The aerosol generating article of Example 19, wherein the first tube has a length of 5 mm.
Example 21:
An aerosol-generating article according to any of the preceding examples, wherein the second tube has an inner diameter of 1 mm to 3 mm.
Example 22:
The aerosol generating article of Example 21, wherein the second tube has an inner diameter of 2 mm.
Example 23:
An aerosol-generating article according to any preceding example, wherein the second tube has a length of 4 mm to 6 mm.
Example 24:
The aerosol generating article of Example 23, wherein the second tube has a length of 5 millimeters.
Example 25:
An aerosol-generating article according to any preceding example, wherein the third tube has an inner diameter of 3 mm to 8 mm.
Example 26:
The aerosol generating article of Example 25, wherein the third tube has an inner diameter of 4 mm.
Example 27:
An aerosol-generating article according to any of the preceding examples, wherein the third tube has a length of 4 mm to 6 mm.
Example 28:
The aerosol-generating article of Example 27, wherein the third tube has a thickness of 5 mm.
Example 29:
An aerosol-generating article according to any of the examples, comprising a ventilation zone.
Example 30:
The aerosol-generating article of Example 29, wherein the ventilation zone comprises one or more rows of ventilation perforations.
Example 31:
An aerosol-generating article according to example 30, wherein the one or more rows of vent perforations are formed through the wall of at least one of the first tube, the second tube, and the third tube.
Example 32:
32. The aerosol-generating article of example 31, wherein the one or more rows of vent perforations are formed through the wall of the third tube.

Embodiments of the invention are described, by way of illustration only, with reference to the following examples and accompanying drawings.

FIG. 1 schematically shows an exploded cross-sectional side view of a mouthpiece assembly for an aerosol-generating article according to the invention. 2 schematically shows a cross-sectional side view of the mouthpiece assembly of FIG. 1; FIG. Figure 3 schematically shows a cross-sectional side view of a mouthpiece assembly for an aerosol-generating article according to the invention. Figure 4 schematically shows a cross-sectional side view of a mouthpiece assembly for an aerosol-generating article according to the invention. Figure 5 schematically shows a cross-sectional side view of an aerosol-generating article according to the invention. Figure 6 schematically shows a cross-sectional side view of an aerosol-generating article according to the invention.

Some aerosol-generating articles heat rather than burn an aerosol-generating substrate, such as a tobacco-containing substrate. In such heated aerosol-generating articles, the aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which is in contact with or within the heat source. , or may be located around the heat source or downstream of the heat source. During use of the aerosol-generating article, heat is transferred from the heat source to the aerosol-generating substrate, which can release volatile compounds. These volatile compounds are entrained in air drawn through the aerosol-generating article by the user. The released volatile compounds condense to form an aerosol as they cool. Aerosols can be inhaled through the mouthpiece by the user.

It is desirable to provide an aerosol-generating article that can condense more of the released volatile compounds, thereby increasing the flow of the aerosol through the mouthpiece. This can provide a better user experience.

Figures 1 and 2 schematically illustrate one embodiment of a mouthpiece assembly 110 for an aerosol-generating article 112 for producing an inhalable aerosol upon heating.

Mouthpiece assembly 110 has a downstream end 114 and an upstream end 116 . The downstream end 114 of the mouthpiece assembly 110 is the end region of the mouthpiece assembly 110 toward which the aerosol flows after generation. An upstream end 116 of mouthpiece assembly 110 is an end region of mouthpiece assembly 110 opposite and/or distal from downstream end 114 . In some examples, upstream end 116 of mouthpiece assembly 110 is the end region of the mouthpiece assembly through which generated aerosol flows before flowing through downstream end 114 .

In other words, during use, the generated aerosol flows from the upstream end 116 of mouthpiece assembly 110 toward the downstream end 114 of mouthpiece assembly 10 .

1 and 2, mouthpiece assembly 110 includes first tube 118, second tube 120, and third tube 122. As shown in FIG. As shown in FIGS. 1 and 2, second tube 120 is positioned between first tube 118 and third tube 122 in this embodiment.

In this example, first tube 118, second tube 120, and third tube 122 are each formed from cellulose acetate. In other words, in the embodiment of FIGS. 1 and 2, first tube 118, second tube 120, and third tube 122 are each cellulose acetate tubes.

In FIG. 1, first tube 118, second tube 120, and third tube 122 are separated from each other. In FIG. 2, first tube 118, second tube 120, and third tube 122 are arranged such that first tube 118 and third tube 122 abut second tube 120, as illustrated. provided in the configuration.

Each of first tube 118, second tube 120, and third tube 122 has a downstream end face and an upstream end face. The downstream end faces of tubes 118 , 120 , 122 are the ends located toward downstream end 114 of mouthpiece assembly 10 . The upstream end faces of tubes 118 , 120 , 122 are the end faces located toward upstream end 116 of mouthpiece assembly 10 .

First tube 118 has a downstream end face 124 and an upstream end face 126 . Second tube 120 has a downstream end face 128 and an upstream end face 130 . Third tube 122 has a downstream end face 132 and an upstream end face 134 .

In the embodiment shown in FIGS. 1 and 2, first tube 118 and second tube 120 are arranged such that upstream end face 124 of first tube 118 abuts downstream end face 126 of second tube 120 . be.

In the embodiment shown in FIGS. 1 and 2, second tube 120 and third tube 122 are arranged such that downstream end face 134 of third tube 122 abuts upstream end face 128 of second tube 120 . be.

In this embodiment, first tube 118 abuts second tube 120 and third tube 122 abuts second tube 120 . In other embodiments, first tube 118, second tube 120, and third tube 122 may be connected or attached to each other. First tube 118, second tube 120, and third tube 122 may be attached to each other by, for example, one or more securing elements, or an adhesive.

First tube 118 may be considered a "mouthpiece" tube because, in use, first tube 118 is a component of mouthpiece assembly 110 that may contact the user's mouth.

The second tube 120 may be considered a "venturi" tube because, as described, in use the second tube 120 may provide a constriction in the flow path of the generated aerosol.

Third tube 122 may be considered a "diffuser" tube because, in use, third tube 122 may provide space for the generated aerosol to combine with air.

The first tube 118 has a first tube inner diameter 136 . The second tube has a second tube inner diameter 138 . The third tube 122 has a third tube inner diameter 140 . 1 and 2, each of first tube 118, second tube 120, and third tube 122 has a uniform inner diameter that is the same along the length of each tube.

The inner diameter of first tube 118, second tube 120, or third tube 122 is understood to be the diameter or distance between the inner walls of the tubes.

The inner diameter of the second tube 120 is smaller than the inner diameter of the first tube 118 . In other words, the inner diameter 138 of the second tube is smaller than the inner diameter 136 of the first tube.

The inner diameter of the second tube 120 is smaller than the inner diameter of the third tube 122 . In other words, the inner diameter 138 of the second tube is smaller than the inner diameter 140 of the third tube.

In some embodiments, the inner diameter of first tube 118 is greater than the inner diameter of third tube 122, such as the embodiment shown in FIGS. In other words, in some embodiments, first tube inner diameter 136 is greater than third tube inner diameter 140 .

In the embodiment of mouthpiece assembly 110 shown in FIGS. 1 and 2, first tube inner diameter 136 is 4 mm, second tube inner diameter 138 is 2.5 mm, and third tube inner diameter is 3.5 mm. 5 mm.

In the embodiment of mouthpiece assembly 110 shown in FIGS. 1 and 2, first tube 118 has a length of 5 mm, second tube 120 has a length of 5 mm, and third tube 122 has a length of 5 mm. has a length of

FIG. 3 schematically illustrates another embodiment of a mouthpiece assembly 210 for an aerosol-generating article 112 for generating an inhalable aerosol upon heating.

The embodiment of FIG. 3 has the same components as the embodiment shown in FIGS. 1 and 2, and the components are numbered accordingly.

However, the mouthpiece assembly 210 shown in FIG. 3 has two differences with respect to the mouthpiece assembly 110 shown in FIGS.

First, in mouthpiece assembly 210 of FIG. 3, the inner diameter of first tube 118 is not uniform along its length. Instead, the inner diameter 136 of the first tube varies along the length of the first tube 118 . The inner diameter of first tube 118 increases from upstream end face 124 of first tube 118 to downstream end face 126 of first tube 118 . In other words, in the embodiment shown in FIG. 3, first tube inner diameter 136 is greater at downstream end face 126 of first tube 118 than at upstream end face 124 of first tube 118 .

Second, in mouthpiece assembly 210 of FIG. 3, the inner diameter of third tube 122 is not uniform along its length. Instead, the inner diameter 140 of the third tube varies along the length of the third tube 122 . The inner diameter of the third tube 122 decreases from the upstream end face 132 of the third tube 122 to the downstream end face 134 of the third tube 122 . In other words, in the embodiment shown in FIG. 3, the inner diameter 140 of the third tube is smaller at the downstream end face 134 of the third tube 122 than at the upstream end face 132 of the third tube 122 .

In the example of FIG. 3, the inner diameter of first tube 118 is the average diameter or distance between the inner walls of first tube 118 . The inner diameter of third tube 122 is the average diameter or distance between the inner walls of third tube 122 . The inner diameter of the second tube 120 is the diameter or distance between the inner walls of the second tube 120 .

FIG. 4 schematically illustrates another embodiment of a mouthpiece assembly 310 for an aerosol-generating article 112 for generating an inhalable aerosol upon heating.

The embodiment of FIG. 4 has the same components as the embodiment shown in FIGS. 1 and 2, and the components are numbered accordingly.

However, the mouthpiece assembly 310 shown in FIG. 4 has differences with respect to the mouthpiece assembly 110 shown in FIGS.

In mouthpiece assembly 310 of FIG. 4, the inner diameter of first tube 118 is not uniform along its length. Instead, the inner diameter 136 of the first tube varies along the length of the first tube 118 . The inner diameter of first tube 118 increases from upstream end face 124 of first tube 118 to downstream end face 126 of first tube 118 . In other words, in the embodiment shown in FIG. 4, first tube inner diameter 136 is greater at downstream end face 126 of first tube 118 than at upstream end face 124 of first tube 118 .

In the example of FIG. 4, the inner diameter of first tube 118 is the average diameter or distance between the inner walls of first tube 118 . The inner diameter of the second tube 120 is the diameter or distance between the inner walls of the second tube 120 . The inner diameter of the third tube 122 is the diameter or distance between the inner walls of the second tube 120 .

FIG. 5 schematically illustrates one embodiment of an aerosol-generating article 112. As shown in FIG. In the example of FIG. 5, aerosol-generating article 112 includes mouthpiece assembly 110 shown schematically in FIGS.

Aerosol-generating article 112 also includes aerosol-forming substrate 142 . Aerosol-forming substrates include vaporizable components to form an aerosol. In the example of FIG. 5, aerosol-forming substrate 142 is a liquid nicotine formulation. In another example, aerosol-forming substrate 142 may be a different formulation. In some examples, aerosol-forming substrate 142 may be a gel formulation.

In the example shown in FIG. 5, aerosol-generating article 112 includes fourth tube 144 . The illustrated embodiment also includes a fifth tube 146 . Fourth tube 144 is disposed concentrically with first tube 118 , second tube 120 , and third tube 122 . Fifth tube 146 is disposed concentrically with first tube 118 , second tube 120 and third tube 122 .

In this embodiment, fourth tube 144 is provided at the central openings of third tube 122 and fifth tube 146 . In another embodiment, fourth tube 144 may be provided only at the central opening of third tube 122 . Fourth tube 144 abuts third tube 122 and fifth tube 146 . In another embodiment, fourth tube 144 is attached to third tube 122 and fifth tube 146 by one or more securing elements or adhesives.

In some embodiments, fourth tube 144 may be formed from a material that is substantially impermeable to air. For example, fourth tube 144 may be formed from cardboard.

In the embodiment shown in FIG. 5, fifth tube 146 abuts third tube 122 . In another embodiment, third tube 122 and fifth tube 146 may be connected or attached to each other. Third tube 122 and fifth tube 146 may be attached to each other by, for example, one or more securing elements, or an adhesive. Third tube 122 and fifth tube 146 may be arranged such that the upstream end face of fifth tube 146 abuts the downstream end face 132 of third tube 122 . In the embodiment of FIG. 5, fifth tube 146 has the same inner diameter as third tube 122 . The fifth tube 146 therefore has an inner diameter of 3.5 mm. In another example, fifth tube 146 may have an inner diameter that is different than the inner diameter of third tube 122 .

In the example of FIG. 5, space 148 is defined within aerosol-generating article 112 . A space 148 is located between the fifth tube 146 and the aerosol-forming substrate 142 . In embodiments that do not include fifth tube 146 , space 148 may be defined between third tube 122 and aerosol-forming substrate 142 . In some examples, space 148 may provide a region that allows vaporized volatile compounds of aerosol-forming substrate 142 to cool and nucleate into an aerosol.

Aerosol-generating article 112 shown in FIG. 5 also includes upstream element 150 . Upstream element 150 is positioned upstream of aerosol-forming substrate 142 . In this example, upstream element 150 abuts aerosol-forming substrate 142 . In the embodiment of Figure 5, upstream element 150 is an annular plug of fibrous filtration material. The upstream element 150 of Figure 5 has a length of 5mm. The RTD of upstream element 150 of FIG. 5 is approximately 130 millimeters H2O.

In the example of FIG. 5, aerosol-generating article 112 also includes wrapper 152 . A wrapper 152 is provided over the exterior surface of the components of the aerosol-generating article 112 . Wrapper 152 partially encloses at least some of the components of aerosol-generating article 112 . In this example, wrapper 152 partially encloses all of the components of aerosol-generating article 112 . As shown in FIG. 5, in some embodiments wrapper 152 completely encloses all of the components of aerosol-generating article 112 except for the downstream end of first tube 118 and the upstream end of upstream element 150 . do.

The embodiment of aerosol-generating article 112 shown in FIG. 5 also includes a ventilation zone. Ventilation zones are provided at locations along the aerosol-generating article 112 . In this embodiment, a ventilation zone is provided within the area of the third tube 122 . In this embodiment, the ventilation zone is a circumferential row of perforations 154 formed through wrapper 152 and third tube 122 . Perforations 154 allow air to flow from outside aerosol-generating article 112 through perforations 154 and into the opening defined by third tube 122 .

FIG. 6 schematically illustrates an alternative embodiment of aerosol-generating article 212. As shown in FIG. In the example of FIG. 6, aerosol-generating article 212 includes mouthpiece assembly 110 shown schematically in FIGS.

In the embodiment of aerosol-generating article 212 shown in FIG. 6, the construction of upstream end 116 differs from the construction of upstream end 116 of the embodiment of aerosol-generating article 112 shown in FIG. 5, as described.

In the example of FIG. 6, upstream element 150 is positioned immediately upstream of aerosol-forming substrate 142 and abuts aerosol-forming substrate 142 . Upstream element 150 includes an annular plug containing fibrous filtration material. In this embodiment, upstream element 150 comprises an annular plug of cellulose acetate surrounded by a rigid wrapper. In the example of FIG. 6, upstream element 150 has a length of 5 mm and the RTD of upstream element 150 is 30 millimeters H2O.

In the example of FIG. 6, aerosol-generating article 212 also includes recess 156 . Recess 156 extends from upstream end 116 of aerosol-generating article 212 , through upstream element 150 and through at least a portion of aerosol-forming substrate 142 .

Recess 156 is located along the central axis of aerosol-generating article 212 . In the example of FIG. 6, recess 156 has a circular cross-sectional shape. In the example shown, the recess 156 passes through both the annular plug of fibrous filtration material of the upstream element 150 and the annular plug of porous media of the aerosol-forming substrate 142, thereby allowing the upstream element 150 and the aerosol to flow. It extends the full length of both of the forming substrates 142 . In this example, recess 156 has a length of 15 mm, corresponding to the combined length of upstream element 150 and aerosol-forming substrate 142 . In the example of FIG. 6, the recess has a diameter of 4 mm.

Aerosol-generating article 212 of FIG. 6 has wrapper 152 . A wrapper 152 is provided on the inner longitudinal surface of the recess. Wrapper 152 extends the entire length of recess 156 and is provided over the entire longitudinal inner surface of recess 156 .

In the embodiment shown in FIG. 6, the downstream end of recess 156 is defined by wrapper 152 . This is accomplished by mechanically folding wrapper 152 at the downstream end of recess 156 .

Wrapper 152 extends from the upstream end of recess 156 over the upstream end of aerosol-generating article 212 . Wrapper 152 also extends across the outer surface of aerosol-generating article 212 . In this manner, wrapper 212 acts to connect the various components of aerosol-generating article 212 .

Wrapper 152 may include a layer of cellulosic paper co-laminated with a layer of aluminum foil. In this example, wrapper 152 is disposed such that the paper layer is on the outer surface of aerosol-generating article 212 .

Use of the aerosol-generating article 112 shown in FIG. 5 will now be described.

In use, the aerosol-generating article 112 is inserted into the aerosol-generating device. When the aerosol-generating article 112 is in the insertion position within the aerosol-generating device, the heating element of the aerosol-generating device is adjacent to the aerosol-forming substrate 142 . When the aerosol generator is activated, the heating element is heated. The temperature rise of the heating element heats the aerosol-forming substrate 142 . The volatile compounds of the aerosol-forming substrate 142 are then vaporized to form a vapor, which is cooled and nucleated into an aerosol within the space 148 between the fifth tube 146 and the aerosol-forming substrate 142.

When the user inhales (i.e., inhales from) the downstream end 114 of the aerosol generator 112 , air is forced through the perforations 154 and into the fourth tube 144 due to the resulting pressure change within the aerosol generator 112 . sucked in. Air drawn into aerosol-generating article 112 through perforations 154 entrains aerosol from space 148 . Fourth tube 144 prevents entrained aerosol from being lost into the structure of third tube 122 or fifth tube 146 .

The aerosol-laden air then flows through third tube 122 and into second tube 120 due to the pressure regime inside aerosol-generating article 112 . The narrow inner diameter of the second tube 120 provides a venturi effect, which compresses the aerosol-entrained air while it is in the second tube 120 .

As the user inhales through the downstream end 114 of the aerosol generator 112 , the aerosol-entrained air then exits the second tube 120 and enters the first tube 118 . As the aerosol-laden air is drawn from the second tube 120 into the tube 118, the larger diameter first tube 118 allows the air to expand and cool, thereby producing more droplets. formed into an aerosol. The aerosol can then be inhaled by the user through the downstream end of first tube 118 .

In normal use of aerosol-generating article 112 , a user inhales an aerosol by engaging first tube 118 with his or her mouth at downstream end 114 of aerosol-generating article 112 . In the embodiment of FIG. 5, first tube 118 is a tube formed from cellulose acetate, so first tube 118 is stiff and resilient, providing an improved user experience.

First tube 118 formed from a rigid material such as cellulose acetate also ensures that a user can properly handle aerosol-generating article 112 .

First tube 118, which is formed from a material that is substantially impermeable to water, such as cellulose acetate, is also less sensitive to humidity from the user's mouth.

For the purposes of this specification and the appended claims, unless otherwise indicated, all numbers expressing amounts, quantities, percentages, etc. are modified in all instances by the term "about." should be understood as Also, all ranges are inclusive of the maximum and minimum points disclosed, and include any intermediate ranges therein, whether or not specifically recited herein. good. Therefore, in this context the figure A is understood as A±10%. Within this context, the number A may be considered to include numbers that are within a common standard error for the measurement of the property that the number A modifies. The number A, as used in the appended claims, is such that, in some cases, the amount by which A deviates does not materially affect the basic and novel properties of the claimed invention. Conditions may deviate by the percentages listed above. Also, all ranges are inclusive of the maximum and minimum points disclosed, and include any intermediate ranges therein, whether or not specifically recited herein. good.

Claims (12)

An aerosol-generating article for producing an inhalable aerosol upon heating, said aerosol-generating article comprising:
a mouthpiece assembly including a first tube, a second tube, and a third tube;
an aerosol-forming substrate;
the first pipe abuts the downstream end face of the second pipe, the third pipe abuts the upstream end face of the second pipe,
The inner diameter of the second tube is smaller than the inner diameter of the first tube,
the inner diameter of the second tube is smaller than the inner diameter of the third tube;
The inner diameter of the first tube is 3 mm to 8 mm,
the ratio of the inner diameter of the first tube to the inner diameter of the second tube is 1.2 to 5;
The aerosol-generating article, wherein the ratio of the inner diameter of the first tube to the inner diameter of the third tube is 0.5-2. 2. The aerosol-generating article of claim 1, wherein the inner diameter of the first tube is greater than the inner diameter of the third tube. 3. The aerosol-generating article of claim 1 or claim 2, wherein the first tube is a cellulose acetate tube. The aerosol-generating article of any of claims 1-3, wherein the second tube is a cellulose acetate tube. The aerosol-generating article of any of claims 1-4, wherein the third tube is a cellulose acetate tube. The aerosol-generating article of any preceding claim, wherein the ratio of the inner diameter of the third tube to the inner diameter of the second tube is 1.5-5. An aerosol-generating article according to any preceding claim, wherein the first tube has an inner diameter of 4 mm. The aerosol-generating article of any preceding claim, wherein the second tube has an inner diameter of 1 mm to 3 mm. The aerosol-generating article of any of claims 1-8, wherein the third tube has an inner diameter of 3mm to 8mm. An aerosol-generating article according to any preceding claim, comprising a ventilation zone. 11. The aerosol-generating article of claim 10, wherein said ventilation zone comprises one or more rows of ventilation perforations. 12. The aerosol-generating article of claim 11, wherein said one or more rows of vent perforations are formed through a wall of at least one of said first tube, said second tube, and said third tube.

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