JP2023506024A - Retainers for aerosol-generating articles - Google Patents

Abstract

A kit comprising an aerosol-generating article (2) comprising a combustible heat source (4) and an aerosol-forming substrate (10) and a retainer (300) for the aerosol-generating article, the retainer comprising a partially closed second A tubular body (302) having one end (304a) and an open second end (304b), the tubular body extending between the first end and the second end defining a longitudinal passageway (305) through which the tubular body comprises a first portion (307) proximate a first end including a plurality of openings (306); and a second portion (309) between the ends, wherein the tubular body at least partially surrounds the aerosol-generating article within the passageway such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article. the first end and the first portion of the tubular body such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article within the passageway; When received, at least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article is configured to remain exposed through the plurality of openings in the first end and first portion of the tubular body. and a retainer comprising a tubular body wherein the ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.1.
[Selection drawing] Fig. 7

Description

The present invention relates to retainers for aerosol-generating articles, such as heated aerosol-generating articles. In particular, without limitation, one or more embodiments of the present invention may relate to retainers for aerosol-generating articles, wherein the aerosol-generating article includes a combustible heat source and an aerosol-forming substrate.

A number of aerosol-generating articles have also been proposed in the art in which the tobacco is heated rather than burned. One purpose of such "heated" aerosol-generating articles is to reduce known harmful smoke constituents of the type produced by combustion and pyrolytic decomposition of tobacco in conventional cigarettes. In one known type of heated aerosol-generating article, aerosol is generated by heat transfer from a combustible heat source to a physically separate aerosol-forming substrate located downstream of the combustible heat source. During use, the volatile compounds are released from the aerosol-forming substrate by heat transfer from a combustible heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol that is inhaled by the user.

around at least a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate of the heated aerosol-generating article to ensure conductive heat transfer from the combustible heat source to the aerosol-forming substrate to obtain the aerosol; It is known to include thermally conductive elements. For example, in WO-A2-2009/022232, a combustible heat source, an aerosol-forming substrate downstream of the combustible heat source, around a rear portion of the combustible heat source and an adjacent front portion of the aerosol-forming substrate, and A heated aerosol-generating article with a thermally conductive element in direct contact is disclosed. The thermally conductive element and the aerosol-forming substrate are surrounded by an outer wrapper of cigarette paper. In use, the front portion of the aerosol-forming substrate is conductively heated through the rear portion of the adjacent combustible heat source and the thermally conductive element.

In aerosol-generating articles in which the tobacco is heated rather than combusted, the temperature achieved at the aerosol-forming substrate has a significant impact on its ability to produce acceptable aerosols. It is typically desirable to maintain the temperature of the aerosol-forming substrate within a certain range in order to optimize aerosol delivery to the user. For example, if the temperature of the aerosol-forming substrate drops too much, it can adversely affect the consistency and amount of aerosol delivered to the user.

Combustible heat sources in aerosol-generating articles require sufficient air (oxygen) to enable ignition and support sustained combustion. Therefore, any means provided for securing and maintaining the combustible heat source should not unduly restrict the supply of air to the combustible heat source. If the air supply is overly restricted, sustained combustion of the combustible heat source will not be achieved during use, reducing the temperature of the aerosol-forming substrate and affecting the consistency and amount of aerosol delivered to the user. can have a negative impact.

Various combustible carbon-containing heat sources have been proposed in the art for use in heated aerosol-generating articles. Combustion temperatures of combustible carbon-containing heat sources for use in heated aerosol-generating articles are typically about 600°C to 800°C. Heated aerosol-generating articles with a combustible carbon-containing heat source can have an undesirably high ignition propensity due to the high combustion temperature of the combustible carbon-containing heat source. As used herein, the term "ignition propensity" refers to the ability or propensity of a combustible heat source to ignite other objects after being ignited. Additionally, high combustion temperatures can make it difficult to extinguish combustible heat sources.

It would be desirable to provide a retainer for an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate that protects the combustible heat source during use.

It would be desirable to provide a retainer for an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate that reduces the ignition propensity of the combustible heat source during and after use.

It would be desirable to provide a retainer for an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate that facilitates extinguishing the combustible heat source after use.

It would be desirable to provide a retainer for an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate that does not significantly adversely affect the illumination time of the combustible heat source.

It would be desirable to provide a retainer for an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate that does not significantly adversely affect the aerosol delivery of the aerosol-generating article.

According to the present disclosure, an aerosol-generating article comprising a combustible heat source and an aerosol-forming substrate, and a retainer, a tubular body having a partially closed first end and an open second end, comprising: , the tubular body defines a longitudinal passageway extending between the first end and the second end, the tubular body having a second end proximate the first end including a plurality of openings; a tubular body including a first portion and a second portion between the first portion and the second end, wherein the tubular body is arranged such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article; and wherein at least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article is configured to at least partially receive the aerosol-generating article within the passageway when the aerosol-generating article is received within the passageway. the first end and first portion of the tubular body configured to remain exposed through the plurality of openings in the first end and first portion of the tubular body; A kit is provided comprising a retainer comprising a tubular body having a ratio of the inner diameter to the outer diameter of the exposed surface of the combustible heat source of at least about 1.1.

The retainer advantageously protects the combustible heat source of the aerosol-generating article from breakage during lighting so as not to significantly adversely affect the lighting time of the combustible heat source. The retainer also advantageously protects the combustible heat source of the aerosol-generating article from damage during combustion without significantly adversely affecting the aerosol delivery of the aerosol-generating article. In the event of breakage or drop-off of the combustible heat source, the retainer retains the combustible heat source of the aerosol-generating article within the tubular body. Further, the retainer advantageously protects the combustible heat source from contact with others, thus reducing the ignition propensity of the combustible heat source during and after use.

Advantageously, the aerosol-generating article cannot be inserted or removed from the passageway through the partially closed first end. However, air can flow through the partially closed first end to the combustible heat source to facilitate lighting and sustained combustion of the combustible heat source.

At least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article remains exposed through the plurality of openings in the first end and first portion of the tubular body when the aerosol-generating article is received within the passageway. Advantageously, configuring the first end and first portion of the tubular body to provide sufficient heat to the combustible heat source to enable illumination and support sustained combustion. It has been found to allow air supply.

The ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.1. This ratio has surprisingly been found to positively affect the temperature of the aerosol-forming substrate of the aerosol-delivery and aerosol-generating article.

As used herein, the term "aerosol-generating article" refers to an article that includes an aerosol-forming substrate that releases volatile compounds capable of forming an aerosol that can be inhaled by the user. As used herein, the term "aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds upon heating that are capable of forming an aerosol. The aerosol produced from the aerosol-forming substrate of an article according to the invention may or may not be visible, vapor (e.g. fines of substances that are gaseous are usually liquid or solid at room temperature), and liquid droplets of gas and condensed vapor.

The aerosol-forming substrate may be in the form of a plug or segment comprising a material capable of releasing volatile compounds upon heating, which can be surrounded by an outer wrapper to form an aerosol. When the aerosol-forming substrate is in the form of such a plug or segment, the entire plug or segment, including the outer wrapper, is considered the aerosol-forming substrate.

As used herein, the term "partially closed" allows air to flow through the first end to the combustible heat source, but not from the passageway through the first end. Used to describe the placement of the first end that prevents insertion or removal of the aerosol-generating article. Allowing air to flow through the first end to the combustible heat source facilitates lighting and sustained combustion of the combustible heat source. For the avoidance of doubt, the term "at least partially closed" includes an arrangement in which the first end is completely closed such that air cannot flow through the first end. .

As used herein, the term "open" is used to describe a configuration of the second end that allows insertion or removal of an aerosol-generating article from the passageway through the second end. .

The percentage of the exposed surface area of the combustible heat source of the aerosol-generating article that remains exposed through the plurality of openings in the first end and first portion of the tubular body when the aerosol-generating article is received within the passageway is Refers to the opening percentage of the first portion of the tubular body covering the heat source. For the avoidance of doubt, it is not the total exposed area of combustible heat sources. The percentage is calculated by considering the total external surface of the tubular over a portion of the combustible heat source combustion zone. In other words, the percentage refers to the percentage of tubular body surface removed by forming the opening and the partially closed first end relative to the total tubular body surface covering the exposed surface area of the heat source.

The terms "distal," "upstream," and "forward," and "proximal," "downstream," and "rearward," are used to describe the relative positions of components or component portions of an aerosol-generating article. be. Aerosol-generating articles according to the present invention have a proximal end through which aerosol exits the aerosol-generating article for delivery to a user in use, and an opposite distal end. The proximal end of the aerosol-generating article is sometimes referred to as the mouth end. In use, a user inhales on the proximal end of the aerosol-generating article to inhale the aerosol generated by the aerosol-generating article. The terms upstream and downstream relate to the direction of travel of the aerosol through the aerosol-generating article when the user inhales the proximal end. The proximal end of the aerosol-generating article is downstream of the distal end of the aerosol-generating article. Also, the proximal end of the aerosol-generating article may be referred to as the downstream end of the aerosol-generating article, and the distal end of the aerosol-generating article may also be referred to as the upstream end of the aerosol-generating article.

In certain preferred embodiments, the first end and first portion of the tubular body receive the aerosol-generating article within the passageway such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article. such that about 80% to about 90% of the exposed surface area of the combustible heat source of the aerosol-generating article remains exposed through the plurality of openings in the first end and first portion of the tubular body when the can be configured. This configuration has been found to provide improved air supply to the combustible heat source to allow illumination and support sustained combustion.

The ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is preferably at least about 1.16, preferably from about 1.16 to about 1.6, more preferably at least about 1. .2. These preferred ratios have also surprisingly been found to positively affect the temperature of the aerosol-forming substrate of the aerosol-delivery and aerosol-generating article.

The tubular body can be configured to at least partially receive the aerosol-generating article in the passageway such that a first portion of the tubular body surrounds the combustible heat source and the aerosol-forming substrate of the aerosol-generating article. Advantageously, by enclosing both the combustible heat source and the aerosol-forming substrate of the aerosol-generating article, air is prevented from not only reaching the combustible heat source, but also any air that may form in the aerosol-forming substrate section of the aerosol-generating article. It is also allowed to enter the air intake.

Prior to use, the aerosol-generating article may be inserted through the second end of the tubular body and into the passageway. After use, the aerosol-generating article can be removed from the passageway through the second end.

The passageway can be configured to receive at least the combustible heat source and the aerosol-forming substrate of the aerosol-generating article when the aerosol-generating article is inserted in a direction from the second end toward the first end.

The tubular body may contact the combustible heat source of the aerosol-generating article. Contact between the first end and the combustible heat source is preferably limited to avoid heat loss through conduction. Contact between the first end and the combustible heat source may be limited to between 1 and 4 contact points. Contact between the first end and the combustible heat source may be limited to a surface area of 1 millimeter ² to 4 millimeters ² .

The tubular body may be substantially non-flammable at temperatures reached by combustible heat sources during combustion and ignition. The tubular body can be made of any suitable material or combination of materials. The material forming the tubular body is preferably heat resistant. For example, the tubular body can be formed from a material that can withstand temperatures of approximately 600-800 degrees.

The tubular body may have any suitable dimensions for at least partially receiving an aerosol-generating article containing a combustible heat source within its passageway. For example, the tubular body may have a length of about 5.5 millimeters to about 70 millimeters. For example, the tubular body can have an inner diameter of about 8.5 millimeters to about 12 millimeters.

The material forming the first portion of the tubular body may have a low thermal conductivity. For example, the material forming the first portion of the tubular body has a thermal conductivity of 40 Wm ^-1 K ^-1 or less, preferably 30 Wm ^-1 K ^-1 or less, more preferably 20 Wm ^-1 K ^-1 or less. obtain. Examples of suitable materials for forming the tubular body include metals with low thermal conductivity, such as stainless steel, and ceramics.

The first portion of the tubular body may have any suitable thickness. For example, the first portion of the tubular body may have a thickness of about 20 microns to about 300 microns, preferably 100 microns to 250 microns.

A first portion of the tubular body is configured to protect a combustible heat source. Multiple openings in the tubular body provide sufficient air supply to the combustible heat source to allow illumination and support sustained combustion. A plurality of openings in the tubular body also allow combustion gases produced by combustion of the combustible heat source to escape from the passageway. In addition to surrounding the combustible heat source, the plurality of openings may also surround the aerosol-forming substrate to allow airflow to the substrate. A plurality of openings may surround the aerosol-forming substrate to allow airflow to the aerosol-generating article through air inlets provided within the aerosol-forming substrate.

The second portion of the tubular body is configured to be held by a user when the aerosol-generating article is received within the passageway such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article. may The second part can thus act as a grip.

A second portion of the tubular body may comprise a material having a low thermal conductivity. For example, the second portion of the tubular body has a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less, preferably 0.4 Wm ^-1 K ^-1 or less, more preferably 0.3 Wm ^-1 K ^{-1 or} less. can include materials that have Advantageously, by providing a material with low thermal conductivity, the temperature of the outer surface of the second portion is reduced so that a user can comfortably hold the second portion of the tubular body. Heat transfer through the part is reduced. Examples of suitable materials for forming the second portion include polyetheretherketone (PEEK) and other heat resistant polymers. The second portion may be made from an elastomeric material such as silicone or polyurethane to accommodate different diameter aerosol-generating articles.

The second portion of the tubular body may comprise multiple layers. A second portion of the tubular body may include an outer layer having a low thermal conductivity. For example, the second portion of the tubular body has a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less, preferably 0.4 Wm ^-1 K ^-1 or less, more preferably 0.3 Wm ^-1 K ^{-1 or} less. may include an outer layer having Advantageously, by having the outer layer having a low thermal conductivity, heat transfer through the outer layer of the second portion is reduced, reducing the temperature of the outer surface of the outer layer and allowing the user to heat the second portion of the tubular body. can be held comfortably. Examples of suitable materials for forming the outer layer of the second portion include polyetheretherketone (PEEK) and other heat resistant polymers. The outer layer of the second portion may be made from an elastomeric material such as silicone or polyurethane.

The second portion of the tubular body may include an opening that allows a user to contact the outer surface of the aerosol-generating article when received in the passageway. This allows the user to simultaneously grasp the aerosol-generating article and retainer when the aerosol-generating article is received within the passageway.

The kit may further comprise an impermeable cap, the cap configured to fit over the first end and first portion of the tubular body of the retainer.

The cap advantageously facilitates extinguishing the combustible heat source of the aerosol-generating article after use. When the impermeable cap is fitted over the first end and first portion of the tubular body, the plurality of openings is covered by the cap, the cap restricting air supply to the combustible heat source. Inhibits combustion of combustible heat sources. This allows the combustible heat source to be extinguished faster than simply burning it.

The cap may include an inner layer with high thermal conductivity. For example, the cap may include an inner layer having a thermal conductivity of 120 Wm ^-1 K ^-1 or higher, preferably 200 Wm ^-1 K ^{-1 or higher} , more preferably 280 Wm ^-1 K ^-1 or higher. Advantageously, by providing the cap with an inner layer having a high thermal conductivity, the inner layer acts as a heat sink and reduces the temperature of the combustible heat source more quickly than a cap without a high thermal conductivity inner layer. Let Examples of suitable materials for forming the inner layer of the cap include aluminum and copper.

The cap may include an outer layer with low thermal conductivity. For example, the cap may comprise an outer layer having a thermal conductivity of 0.5 Wm ⁻¹ K ⁻¹ or less, preferably 0.4 Wm ⁻¹ K ⁻¹ or less, more preferably 0.3 Wm ⁻¹ K ⁻¹ or less. . Advantageously, by having an outer layer with low thermal conductivity, the heat transfer of the outer layer of the cap is reduced, resulting in a reduced temperature of the outer surface of the cap and a comfortable hold of the cap by the user. can be done. Examples of suitable materials for forming the outer layer of the cap include polyetheretherketone (PEEK) and other heat resistant polymers. The cap may be made from an elastomeric material such as silicone or polyurethane.

The cap may contain one or more phase change materials. The phase change material may dissipate heat generated by the combustible heat source, thereby cooling the combustible heat source faster than the cap without the phase change material.

In certain preferred embodiments, the retainer tubular body cap and first portion may be configured to be detachably coupled to each other via a snap-fit connection. This helps ensure correct placement of the cap on the retainer. Optionally, the snap fit connection may produce an audible click when the cap is properly coupled to the retainer to provide an audible indication of correct placement of the cap.

According to the present disclosure, a retainer for an aerosol-generating article including a combustible heat source and an aerosol-forming substrate is provided, the retainer being a tubular body having a partially closed first end and an open second end. wherein the tubular body defines a longitudinal passageway extending between the first end and the second end, the tubular body including a plurality of openings at the first end; A tubular body including a proximate first portion and an impermeable second portion between the first portion and the second end, the tubular body including a combustible heat source and an aerosol-forming substrate within the passageway. At least partially receiving the aerosol-generating article, the tubular body and the aerosol-generating article having a first position where a first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article and a second portion of the tubular body The aerosol-generating article is configured to be longitudinally moveable between a second position surrounding the combustible heat source and a plurality of openings in the first portion at the first position to open the combustible heat source. and a tubular configured to allow airflow to the aerosol-forming substrate of the aerosol-generating article, the second portion configured to inhibit combustion of the combustible heat source of the aerosol-generating article at the second location. Including body.

The retainer advantageously protects the combustible heat source of the aerosol-generating article from breakage during lighting so as not to significantly adversely affect the lighting time of the combustible heat source. The retainer also advantageously protects the combustible heat source of the aerosol-generating article from damage during combustion without significantly adversely affecting the aerosol delivery of the aerosol-generating article. In the event of breakage or drop-off of the combustible heat source, the retainer retains the combustible heat source of the aerosol-generating article within the tubular body. Further, the retainer advantageously protects the combustible heat source from contact with others, thus reducing the ignition propensity of the combustible heat source during and after use.

Advantageously, the aerosol-generating article cannot be inserted or removed from the passageway through the partially closed first end. However, air can flow through the partially closed first end to the combustible heat source to facilitate lighting and sustained combustion of the combustible heat source.

Another advantage of the retainer is that it facilitates extinguishing the combustible heat source of the aerosol-generating article after use. When the tubular body and the aerosol-generating article are in the second position, the second portion of the tubular body surrounds the combustible heat source of the aerosol-generating article which blocks the supply of air to the combustible heat source, rather than simply combusting it. , to extinguish combustible heat sources more quickly.

The tubular body and the aerosol-generating article are in a first position where a first portion of the tubular body surrounds the combustible heat source and the combustible heat source of the aerosol-generating article and a second portion of the tubular body surrounds the combustible heat source of the aerosol-generating article. The tubular body at least partially encloses the combustible heat source and the aerosol-generating article including the aerosol-forming substrate in the passageway so as to be longitudinally moveable relative to one another between a second position surrounding the combustible heat source. may be configured to receive Advantageously, by enclosing both the combustible heat source and the aerosol-forming substrate of the aerosol-generating article, air is prevented from not only reaching the combustible heat source, but also any air that may form in the aerosol-forming substrate section of the aerosol-generating article. It is also allowed to enter the air intake.

Prior to use, the aerosol-generating article may be inserted through the second end of the tubular body and into the passageway. After use, the aerosol-generating article can be removed from the passageway through the second end.

The passageway can be configured to receive at least the combustible heat source and the aerosol-forming substrate of the aerosol-generating article when the aerosol-generating article is inserted in a direction from the second end toward the first end.

Preferably, the passageway may be configured to allow slidable relative longitudinal movement of the tubular body and the aerosol-generating article between the first position and the second position. Relative longitudinal movement of the tubular body and the aerosol-generating article between the first position and the second position enables control of the air supply to the combustible heat source.

The tubular body may contact the combustible heat source of the aerosol-generating article. Contact between the first end and the combustible heat source is preferably limited to avoid heat loss through conduction. Contact between the first end and the combustible heat source may be limited to between 1 and 4 contact points. Contact between the first end and the combustible heat source may be limited to a surface area of 1 millimeter ² to 4 millimeters ² .

The tubular body may be substantially non-combustible at temperatures reached by the combustible heat source during ignition and combustion. The tubular body can be made of any suitable material or combination of materials. The material forming the tubular body is preferably heat resistant. For example, the tubular body can be formed from a material that can withstand temperatures of approximately 600-800 degrees.

The tubular body may have any suitable dimensions for at least partially receiving an aerosol-generating article containing a combustible heat source within its passageway. For example, the tubular body may have a length of about 5.5 millimeters to about 70 millimeters. For example, the tubular body can have an inner diameter of about 8.5 millimeters to about 12 millimeters.

The material forming the first portion of the tubular body may have a low thermal conductivity. For example, the material forming the first portion of the tubular body has a thermal conductivity of 40 Wm ^-1 K ^-1 or less, preferably 30 Wm ^-1 K ^-1 or less, more preferably 20 Wm ^-1 K ^-1 or less. obtain. Examples of suitable materials for forming the tubular body include metals with low thermal conductivity, such as stainless steel, and ceramics.

The first portion of the tubular body may have any suitable thickness. For example, the first portion of the tubular body may have a thickness of about 20 microns to about 300 microns, preferably 100 microns to 250 microns.

A first portion of the tubular body is configured to protect a combustible heat source. Multiple openings in the tubular body provide sufficient air supply to the combustible heat source to allow illumination and support sustained combustion. A plurality of openings in the tubular body also allow combustion gases produced by combustion of the combustible heat source to escape from the passageway. In addition to surrounding the combustible heat source, the plurality of openings may also surround the aerosol-forming substrate to allow airflow to the substrate. A plurality of openings may surround the aerosol-forming substrate to allow airflow to the aerosol-generating article through air inlets provided within the aerosol-forming substrate.

A second portion of the tubular body may be configured to be held in the first position by a user. The second part is impermeable and does not have any openings. The second portion inhibits combustion of the combustible heat source at the second location by restricting the air supply to the combustible heat source. The second part can thus act as a fire-extinguishing grip.

A second portion of the tubular body may comprise a material having a low thermal conductivity. For example, the second portion of the tubular body has a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less, preferably 0.4 Wm ^-1 K ^-1 or less, more preferably 0.3 Wm ^-1 K ^{-1 or} less. can include materials that have Advantageously, by providing a material with low thermal conductivity, the temperature of the outer surface of the second portion is reduced so that a user can comfortably hold the second portion of the tubular body. Heat transfer through the part is reduced. Examples of suitable materials for forming the second portion include polyetheretherketone (PEEK) and other heat resistant polymers. The second portion may be made from a resilient material such as silicone or polyurethane to accommodate different diameter aerosol-generating articles.

The second portion of the tubular body may comprise multiple layers. A second portion of the tubular body may include an inner layer having a high thermal conductivity. For example, the second portion of the tubular body may comprise an inner layer having a thermal conductivity of 120 Wm ⁻¹ K ⁻¹ or greater, preferably 200 Wm ⁻¹ K ⁻¹ or greater, more preferably 280 Wm ⁻¹ K ^{−1 or} greater. . Advantageously, by providing the second portion of the tubular body with an inner layer having a high thermal conductivity, the inner layer functions as a heat sink when the tubular body and the aerosol-generating article are in the second position. The inner layer reduces the temperature of the combustible heat source faster than the tubular body without the high thermal conductivity inner layer located in the second portion. Examples of suitable materials for forming the inner layer of the second portion of the tubular body include aluminum and copper.

A second portion of the tubular body may include an outer layer having a low thermal conductivity. For example, the second portion of the tubular body has a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less, preferably 0.4 Wm ^-1 K ^-1 or less, more preferably 0.3 Wm ^-1 K ^{-1 or} less. may include an outer layer having Advantageously, by having the outer layer having a low thermal conductivity, heat transfer through the outer layer of the second portion is reduced, reducing the temperature of the outer surface of the outer layer and allowing the user to heat the second portion of the tubular body. can be held comfortably. Examples of suitable materials for forming the outer layer of the second portion include polyetheretherketone (PEEK) and other heat resistant polymers. The outer layer of the second portion may be made from an elastomeric material such as silicone or polyurethane.

According to the present disclosure, kits are provided that include a retainer as described above and an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate.

The first end and first portion of the tubular body of the retainer are tubular with at least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article at the first end and first location of the tubular body. It may be configured to remain exposed through multiple openings in the first portion of the body. It has been found that this arrangement advantageously allows illumination and sufficient air supply to the combustible heat source to support sustained combustion.

In certain preferred embodiments, about 80% to about 90% of the exposed surface area of the combustible heat source of the aerosol-generating article is the first end of the tubular body and the first portion of the tubular body. and remain exposed through a plurality of openings in the first portion of the tubular body in the first position. This configuration has been found to provide improved air supply to the combustible heat source to allow illumination and support sustained combustion.

The ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.1, preferably at least about 1.16, and more preferably from about 1.16 to about 1.1. 6, and even more preferably at least about 1.2. These ratios have surprisingly been found to positively affect the temperature of the aerosol-forming substrate of the aerosol-delivery and aerosol-generating article.

According to the present disclosure, a retainer for an aerosol-generating article comprising a combustible heat source and an aerosol-forming substrate, the tubular body having a first end and a second end, the first end a tubular body at least partially closed and open at a second end defining a longitudinal passageway extending between the first end and the second end; comprises a plurality of openings proximate the first end, the tubular body at least partially receiving an aerosol-generating article including a combustible heat source within the passageway, the plurality of openings exposing the combustible of the aerosol-generating article A tubular body and an open-ended impermeable sleeve around the tubular body configured to surround a heat source, the tubular body and the sleeve having a plurality of openings in the tubular body covered by the sleeve. a first position wherein removal of an aerosol-generating article from the tubular body through the second end and received in the passageway is prevented; and a plurality of openings in the tubular body covered by a sleeve and received in the passageway. an open-ended impermeable sleeve longitudinally moveable about the tubular body from a second position relative to each other from a second position through which the aerosol-generating article to be applied may be removed from the tubular body through the second end; A retainer is provided comprising:

The retainer advantageously protects the combustible heat source of the aerosol-generating article from breakage during lighting so as not to significantly adversely affect the lighting time of the combustible heat source. The retainer also advantageously protects the combustible heat source of the aerosol-generating article from damage during combustion without significantly adversely affecting the aerosol delivery of the aerosol-generating article. In the event of breakage or drop-off of the combustible heat source, the retainer retains the combustible heat source of the aerosol-generating article within the tubular body. Further, the retainer advantageously protects the combustible heat source from contact with others, thus reducing the ignition propensity of the combustible heat source during and after use.

Advantageously, the aerosol-generating article cannot be inserted or removed from the passageway through the first end. However, air can flow through the multiple openings to the combustible heat source to facilitate lighting and sustained combustion of the combustible heat source.

Another advantage of the retainer is that it facilitates extinguishing the combustible heat source of the aerosol-generating article after use. When the tubular body and sleeve are in the second position, the plurality of openings in the tubular body are covered by the sleeve to block the supply of air to the combustible heat source, extinguishing the combustible heat source faster than simply burning it. .

The tubular body may comprise a first portion proximate the first end including the plurality of openings and a second portion between the first and second ends. In the first position the sleeve may cover the second portion of the tubular body and in the second position the sleeve may cover the first portion of the tubular body.

The tubular body and sleeve may be longitudinally moveable relative to each other from the second position to the first position.

In a second position, an aerosol-generating article including a combustible heat source and an aerosol-forming substrate may be inserted into the passageway through the second end of the tubular body. The aerosol-generating article may be inserted into the passageway through the second end of the tubular body prior to use. After use, the aerosol-generating article can be removed from the passageway through the second end. This arrangement allows the retainer to be reused with other aerosol-generating articles.

In the first position, an aerosol-generating article including a combustible heat source and an aerosol-forming substrate can be prevented from being inserted into the passageway through the second end of the tubular body.

The retainer may include a retaining member configured to engage an aerosol-generating article received in the passageway. The retention member may be configured to engage or grip an aerosol-generating article received in the passageway to prevent longitudinal movement of the aerosol-generating article relative to the tubular body.

In certain preferred embodiments, longitudinal movement of the tubular body and sleeve relative to each other from the second position to the first position brings the retention member into contact with the outer surface of the aerosol-generating article. This arrangement combines relative movement of the tubular body and sleeve and engagement of the aerosol-generating article into a single user action such that when the tubular body and sleeve are moved to the first position, the aerosol-generating article automatically grasped.

In certain preferred embodiments, longitudinal movement of the sleeve relative to the tubular body from the first position to the second position releases the retaining member and permits longitudinal movement of the aerosol-generating article relative to the tubular body.

The tubular body and the sleeve may be longitudinally slidable relative to each other between the first position and the second position. This provides a simple guiding action for the user to move the tubular body and sleeve between the first and second positions.

The tubular body may contact the combustible heat source of the aerosol-generating article at the first location. Contact between the first end and the combustible heat source is preferably limited to avoid heat loss through conduction. Contact between the first end and the combustible heat source may be limited to between 1 and 4 contact points. Contact between the first end and the combustible heat source may be limited to a surface area of 1 millimeter ² to 4 millimeters ² .

The tubular body may be substantially non-flammable at temperatures reached by combustible heat sources during combustion and ignition. The tubular body can be made of any suitable material or combination of materials. The material forming the tubular body is preferably heat resistant. For example, the tubular body can be formed from a material that can withstand temperatures of approximately 600-800 degrees. Preferably, the material forming the tubular body has a low thermal conductivity. For example, the material forming the tubular body may have a thermal conductivity of 40 Wm ⁻¹ K ⁻¹ or less, preferably 30 Wm ⁻¹ K ⁻¹ or less, more preferably 20 Wm ⁻¹ K ⁻¹ or less. Examples of suitable materials for forming the tubular body include metals with low thermal conductivity, such as stainless steel, and ceramics.

The tubular body may have any suitable dimensions for at least partially receiving an aerosol-generating article containing a combustible heat source within its passageway. For example, the tubular body may have a length of about 5.5 millimeters to about 70 millimeters. For example, the tubular body can have an inner diameter of about 8.5 millimeters to about 12 millimeters.

The tubular body may have any suitable thickness. For example, the tubular body may have a thickness of about 20 micrometers to about 300 micrometers, preferably 100 micrometers to 250 micrometers.

The passageway can be configured to receive at least the combustible heat source and the aerosol-forming substrate of the aerosol-generating article when the aerosol-generating article is inserted in a direction from the second end toward the first end.

In the first position, the plurality of openings in the tubular body provide a sufficient air supply to the combustible heat source to allow lighting and support sustained combustion of the combustible heat source. A plurality of openings in the tubular body also allow combustion gases produced by combustion of the combustible heat source to escape from the passageway. In addition to surrounding the combustible heat source, the plurality of openings may also surround the aerosol-forming substrate to allow airflow to the substrate. A plurality of openings may surround the aerosol-forming substrate to allow airflow to the aerosol-generating article through air inlets provided within the aerosol-forming substrate.

The sleeve may be substantially non-flammable at temperatures reached by the combustible heat source during ignition and combustion. The sleeve may be made of any suitable material or combination of materials. The material forming the sleeve is preferably heat resistant. The material forming the sleeve preferably has a low thermal conductivity. For example, the material forming the sleeve has a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less, preferably 0.4 Wm ^-1 K ^-1 or less, more preferably 0.3 Wm ^-1 K ^-1 or less. may Examples of suitable materials for forming the sleeve include polyetheretherketone (PEEK) and other heat resistant polymers. The sleeve may be made from an elastomeric material such as silicone or polyurethane to accommodate aerosol-generating articles of different diameters.

The sleeve may be configured to be held by a user when the tubular body and sleeve are in the first position.

According to the present disclosure, kits are provided that include a retainer as described above and an aerosol-generating article that includes a combustible heat source and an aerosol-forming substrate.

wherein at least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article is at the first end and the first portion of the tubular body; It may be configured to remain exposed through a plurality of openings in the first portion. This configuration has been found to provide sufficient air to the combustible heat source to allow illumination and support sustained combustion.

In certain preferred embodiments, about 80% to about 90% of the exposed surface area of the combustible heat source of the aerosol-generating article is the first end of the tubular body and the first portion of the tubular body. and remain exposed through a plurality of openings in the first portion of the tubular body in the first position. This configuration has been found to provide improved air supply to the combustible heat source to allow illumination and support sustained combustion.

The ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.1, preferably at least about 1.16, and more preferably from about 1.16 to about 1.1. 6, and even more preferably at least about 1.2. These ratios have surprisingly been found to positively affect the temperature of the aerosol-forming substrate of the aerosol-delivery and aerosol-generating article.

The retainers for the aerosol-generating articles described herein provide a visual indicator to the user to begin using the aerosol-generating article, a visual indicator to the user to stop using the aerosol-generating article, and the aerosol-generating article. may include a heat indicator that provides one or more of the visual indications to the user when the combustible heat source has been extinguished and the aerosol-generating article has cooled sufficiently to be discarded.

A thermal indicator may be provided on the outer surface of the tubular body. A heat indicator may be provided at a location on the tubular body above the combustible heat source when the aerosol-generating article is received within the passageway. A thermal indicator may be provided on the outer surface of the cap or sleeve.

The thermal indicator may comprise at least one reversible thermochromic material that undergoes a reversible visible color change when the temperature of the thermal indicator rises or falls to the switching temperature.

As used herein in connection with the present invention, the term "thermochromic material" is used to describe any material that undergoes a visible color change at a given switching temperature. Thermochromic materials undergo a visible color change as the temperature increases or goes through a transition range. As used herein in connection with the present invention, the term "switching temperature" is used to describe the temperature at which the visible color change of a thermochromic material is completed. The switching temperature may be determined by measuring the color intensity of the thermochromic material.

The thermochromic material may undergo a first reversible visible color change when the temperature of the thermal indicator rises to a first switching temperature, where aerosol delivery is generated and use of the aerosol-generating article can begin. Provide visual indications to users. When the thermal indicator is below the first switching temperature, it provides a visual indication to the user that the user should not begin using the aerosol-generating article or should stop using it.

The thermochromic material undergoes a second reversible visible color change when the temperature of the heat indicator drops to a second switching temperature that is unable to sustain combustion of the combustible heat source, and the combustible carbonaceous heat source A visual indication can be provided to the user that the fire has been extinguished and that the aerosol-generating article has cooled sufficiently to be placed.

The first switching temperature may be at least about 200 degrees, preferably at least about 250 degrees, more preferably at least about 300 degrees.

The second switching temperature may be less than about 150°C, preferably less than about 100°C, more preferably less than about 80°C.

A thermal indicator may comprise any suitable reversible thermochromic material. For example, the thermal indicator is one selected from the group consisting of reversible thermochromic liquid crystals, reversible thermochromic inorganic materials (e.g., metal complexes), reversible thermochromic organic materials (e.g., leuco dyes), and combinations thereof. It can contain the above materials.

Suitable liquid crystals include, but are not limited to, cholesteryl esters (eg, cholesteryl nonanoate) and cyanobiphenyls. Suitable leuco dyes include, but are not limited to, spirolactones (eg, fluorane and crystal violet lactone), spiropyrans, and fulgides.

Retainers according to the present invention may be used in any suitable aerosol-generating article having a combustible heat source.

A combustible heat source is located at or near the distal end of the aerosol-generating article. The combustible heat source has a front end face and an opposed rear end face. The front end face of the combustible carbonaceous heat source is at the upstream end of the combustible carbonaceous heat source. The upstream end of the combustible carbonaceous heat source is the end of the combustible carbonaceous heat source furthest from the proximal end of the aerosol-generating article. The trailing end face of the combustible carbonaceous heat source is at the downstream end of the combustible carbonaceous heat source. The downstream end of the combustible carbonaceous heat source is the end of the combustible carbonaceous heat source closest to the proximal end of the aerosol-generating article.

Aerosol-generating articles for use with retainers according to the present invention may include any suitable combustible heat source.

Aerosol-generating articles according to the present invention may include a non-blind combustible heat source.

As used herein in connection with the present invention, the term "non-blind" is used to describe a combustible heat source that includes at least one airflow channel extending from the front end face to the rear end face of the combustible heat source. be done.

As used herein in connection with the present invention, the term "airflow channel" means a channel extending along the length of a combustible heat source through which air may be drawn for inhalation by a user. used to describe

Aerosol-generating articles according to the present invention that include a non-blind combustible heat source may include a non-combustible, substantially impermeable barrier between the non-blind combustible heat source and one or more airflow channels.

A barrier between the non-blind combustible heat source and the one or more airflow channels may be glued or otherwise affixed to the non-blind combustible heat source.

Advantageously, the barrier comprises a non-combustible, substantially impermeable barrier coating provided over the inner surface of the one or more airflow channels. In such embodiments, the barrier advantageously comprises a barrier coating provided over at least substantially the entire inner surface of the one or more airflow channels. Further advantageously, the barrier comprises a barrier coating provided over the entire inner surface of the one or more airflow channels.

Aerosol-generating articles according to the present invention may include a blind combustible heat source.

As used herein in connection with the present invention, the term "blind" is used to describe a combustible heat source that does not contain any airflow channels extending from the front end face to the rear end face of the combustible heat source. be.

As used herein in connection with the present invention, the term "blind" describes a combustible heat source that includes one or more airflow channels extending from the front end surface of the combustible heat source to the rear end surface of the combustible heat source. in which a non-combustible, substantially impermeable barrier between the trailing face of the combustible heat source and the aerosol-forming substrate barrier allows air to flow uniformly along the length of the combustible heat source. prevent being pulled through more than one airflow channel.

Aerosol-generating articles according to the present invention that include a blind combustible heat source also include one or more air inlets downstream of the trailing end face of the combustible heat source for drawing air into the aerosol-generating article.

The combustible heat source is preferably a carbonaceous heat source having a carbon content of at least about 35 percent by dry mass of the combustible heat source, more preferably at least about 40 percent, and at least about 45 percent. Most preferably, it is a carbonaceous heat source. When the combustible heat source is a carbonaceous heat source, the combustible heat source may be formed from one or more suitable carbon-containing materials. The term "carbonaceous" means a material containing carbon.

The combustible heat source may be a combustible carbon-based heat source having a carbon content of at least about 50 percent. For example, the combustible heat source may be a combustible carbon-based heat source having a carbon content of at least about 60 percent, or at least about 70 percent, or at least about 80 percent by dry weight of the combustible heat source. The term "carbon-based" means a material that consists primarily of carbon, where at least about 50 percent is carbon by dry weight of the material.

One or more binders may be combined with one or more carbon-containing materials to form a carbonaceous heat source. The combustible heat source can include one or more organic binders, one or more inorganic binders, or a combination of one or more organic binders and one or more inorganic binders.

Instead of or in addition to one or more binders, the combustible heat source may contain one or more additives to improve the properties of the combustible heat source. Suitable additives include additives that promote compaction of combustible heat sources (e.g., sintering aids), additives that promote ignition of combustible heat sources (e.g., perchlorates, chlorates, nitrates, peroxides). oxides, permanganates, zirconium and combinations thereof), additives that promote combustion of combustible heat sources (e.g., potassium and potassium salts such as potassium citrate), and combustion of combustible heat sources Including, but not limited to _, additives that promote _{decomposition} of one or more of the gases produced (eg, catalysts such as CuO, _Fe2O3 and _Al2O3 ). Combustible heat sources for aerosol-generating articles and methods for making such heat sources are known in the art, for example US-A-5,040,552 and US-A-5,595,577 No. is described.

The combustible heat source may contain at least one ignition aid. Advantageously, the combustible heat source may contain at least one ignition aid, as described in WO-A1-2012/164077.

The combustible heat source may be formed by a pressing process or an extrusion process. The combustible carbonaceous heat source is preferably formed by pressing.

Preferably, the combustible heat source has an apparent density of from about 0.8 g/cm ³ to about 1.1 g/cm ³ . Preferably, the mass of the combustible heat source is from about 300 milligrams to about 500 milligrams, more preferably from about 400 milligrams to about 450 milligrams. Preferably, the length of the combustible heat source is from about 7 millimeters to about 17 millimeters, more preferably from about 7 millimeters to about 15 millimeters, even more preferably from about 7 millimeters to about 13 millimeters; About 9 millimeters is most preferred. Preferably, combustible heat sources according to the present invention have a width of from about 5 millimeters to about 9 millimeters, more preferably from about 7 millimeters to about 8 millimeters.

Preferably, the diameter of the combustible heat source is substantially uniform. Alternatively, however, the combustible heat source is tapered such that the diameter of one of the front end face and the rear end face of the combustible heat source is larger than the diameter of the other of the front end face and the rear end face. good too. For example, the combustible heat source may be tapered such that the diameter of the rear end face of the combustible heat source is larger than the diameter of the front end face of the combustible heat source. Preferably, the combustible heat source is substantially cylindrical. The combustible heat source may be a cylindrical combustible heat source of substantially circular cross-section or substantially elliptical cross-section. In a particularly preferred embodiment, the combustible heat source is a substantially cylindrical combustible heat source of substantially circular cross-section.

Aerosol-generating articles for use with retainers according to the present invention may comprise any aerosol-forming substrate.

The aerosol-forming substrate may be a solid aerosol-forming substrate. Solid aerosol-forming substrates may include, for example, one or more of powders, granules, pellets, pieces, spaghetti strands, strips or sheets of materials that are capable of releasing volatile compounds in response to heating. . Solid aerosol-forming substrates may be in loose form or may be provided in a suitable container or cartridge.

Aerosol-forming substrates may include both solid and liquid components.

The aerosol-forming substrate preferably comprises at least one aerosol former and a material capable of releasing a volatile compound in response to heating. The aerosol-forming substrate may contain other additives and ingredients including, but not limited to, wetting agents, flavoring agents, binders and mixtures thereof. Preferably, the aerosol-forming substrate comprises nicotine. More preferably, the aerosol-forming substrate comprises tobacco.

The at least one aerosol former is any suitable known compound or mixture of compounds that, in use, promotes the formation of a dense and stable aerosol and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article. sell. Suitable aerosol forming agents are well known in the art and include polyhydric alcohols, esters of polyhydric alcohols (such as glycerol monoacetate, diacetate or triacetate), and monocarboxylic, dicarboxylic or polycarboxylic acids. Includes aliphatic esters such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers for use in the aerosol-generating articles of the invention are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and most preferably glycerin.

Materials that have the ability to release volatile compounds in response to heating may be plant-derived material loadings. The material capable of releasing volatile compounds in response to heating may be a homogenized charge of plant-derived material. For example, an aerosol-forming substrate may comprise one or more plant-derived materials including, but not limited to, tobacco, tea (e.g., green tea), mint, bay, eucalyptus, basil, sage, bijo cherry, and tarragon. .

Advantageously, the material capable of releasing volatile compounds in response to heating is a loading of tobacco-derived material, most advantageously a homogenized loading of tobacco-derived material.

Aerosol-forming substrates may be in the form of plugs or segments containing materials capable of releasing volatile compounds in response to heating surrounded by an outer wrapper of paper or other material. As noted above, when the aerosol-forming substrate is in the form of such a plug or segment, the entire plug or segment, including any outer wrapper, is considered an aerosol-forming substrate.

Advantageously, the aerosol-forming substrate may comprise a plug of tobacco-derived material wrapped in a plug wrap. More advantageously, the aerosol-forming substrate may comprise a plug of homogenized tobacco-derived material wrapped in a plug wrap.

Preferably, the length of the aerosol-forming substrate is from about 5 millimeters to about 20 millimeters, more preferably from about 6 millimeters to about 15 millimeters, even more preferably from about 7 millimeters to about 12 millimeters; About 9 millimeters is most preferred.

The aerosol-forming substrate may be located in, around, or downstream of the combustible carbonaceous heat source. Advantageously, the aerosol-forming substrate is downstream of the combustible carbonaceous heat source.

In embodiments in which the aerosol-forming substrate is downstream of the combustible carbonaceous heat source, a thermal indicator may be provided on the outer surface of the aerosol-generating article overlying the aerosol-forming substrate.

In embodiments in which the combustible carbonaceous heat source is a blind combustible heat source and the aerosol-forming substrate is downstream of the blind combustible carbonaceous heat source, the aerosol-generating articles according to the invention are arranged one around the perimeter of the aerosol-forming substrate. Advantageously includes an air intake as described above. More advantageously, in such embodiments the aerosol-generating article according to the invention comprises one or more air inlets located near the downstream end of the aerosol-forming substrate.

The aerosol-generating articles described herein may include one or more thermally conductive elements surrounding at least the rearward portion of the combustible carbonaceous heat source and at least the forward portion of the aerosol-forming substrate.

In embodiments where the aerosol-forming substrate is downstream of the combustible carbonaceous heat source, the aerosol-generating article according to the present invention is around both at least the rear portion of the combustible carbonaceous heat source and at least the front portion of the aerosol-forming substrate, It may advantageously be provided with a thermally conductive element in direct contact therewith. In such embodiments, the thermally conductive element provides a thermal link between the combustible carbonaceous heat source and the aerosol-forming substrate, and also provides an aerosol-forming agent from the combustible carbonaceous heat source to provide an acceptable aerosol. Advantageously, it helps facilitate proper heat transfer to the substrate.

The aerosol-generating article according to the present invention comprises one of the combustible carbonaceous heat source and the aerosol-forming substrate such that there is no direct contact between the thermally conductive element and one or both of the combustible carbonaceous heat source and the aerosol-forming substrate. A thermally conductive element may be provided spaced from one or both of the .

Advantageously, the one or more thermally conductive elements are non-combustible.

One or more thermally conductive elements may be oxygen limiting. In other words, one or more of the thermally conductive elements may inhibit or resist passage of oxygen through the thermally conductive elements.

Suitable thermally conductive elements for use in aerosol-generating articles according to the present invention include, but are not limited to, metal foil wrappers, such as aluminum foil wrappers, steel wrappers, iron foil wrappers and copper foil wrappers, and metal alloy foil wrappers. is not limited to

In embodiments in which the aerosol-forming substrate is downstream of the combustible carbonaceous heat source, aerosol-generating articles according to the present invention provide a non-combustible, substantially impermeable material between the trailing surface of the combustible carbonaceous heat source and the aerosol-forming substrate. can advantageously include a barrier of

As used herein in connection with the present invention, the term "non-combustible" means a barrier that is substantially non-combustible at temperatures reached by a combustible carbonaceous heat source during its combustion and ignition. used to describe

The barrier may be adjacent one or both of the trailing face of the combustible carbonaceous heat source and the aerosol-forming substrate. Alternatively, the barrier may be spaced from one or both of the trailing face of the combustible carbonaceous heat source and the aerosol-forming substrate.

As used herein in connection with the present invention, the term "adjacent" is to describe a component or component portion that is in direct contact with another component or component portion. used for

The barrier may be attached or otherwise affixed to one or both of the trailing face of the combustible carbonaceous heat source and the aerosol-forming substrate.

Advantageously, the barrier comprises a substantially impermeable barrier coating provided over the rear end face of the non-combustible, combustible carbonaceous heat source. In such embodiments, the barrier advantageously comprises a barrier coating provided over at least substantially the entire trailing end face of the combustible carbonaceous heat source. More advantageously, the barrier comprises a barrier coating provided over the entire trailing face of the combustible carbonaceous heat source.

The aerosol-generating articles described herein may include a mouthpiece located at their proximal end. The mouthpiece preferably has a low filtration efficiency, more preferably a very low filtration efficiency. The mouthpiece may be a single segment or component mouthpiece. Alternatively, the mouthpiece may be a multi-segment mouthpiece or a multi-component mouthpiece.

The mouthpiece may include a filter that includes one or more segments containing suitable known filtering materials. Suitable filtration materials are well known in the art and include, but are not limited to cellulose acetate and paper. Alternatively or additionally, the mouthpiece may include one or more segments containing absorbents, flavorants, and other aerosol modifiers and additives or combinations thereof.

The aerosol-generating articles described herein may further include transfer or spacer elements between the aerosol-forming substrate and the mouthpiece. The transfer element may be adjacent to one or both of the aerosol-forming substrate and mouthpiece. Alternatively, the transfer element may be spaced from one or both of the aerosol-forming substrate and the mouthpiece.

Inclusion of the moving element advantageously allows cooling of the aerosol produced by heat transfer from the combustible heat source to the aerosol-forming substrate. The inclusion of a moving element also advantageously allows the overall length of the aerosol-generating article to be adjusted to a desired value, such as a length similar to the length of a conventional cigarette, by appropriate selection of the length of the moving element. .

The moving element may have a length from about 7 millimeters to about 50 millimeters, such as from about 10 millimeters to about 45 millimeters, or from about 15 millimeters to about 30 millimeters. The length of the moving element may be other lengths depending on the desired overall length of the aerosol-generating article and the presence and length of other components within the aerosol-generating article.

Preferably, the moving element comprises a tubular hollow body open at at least one end. In such embodiments, in use, air drawn into the aerosol-generating article will have at least one open end as it passes downstream through the aerosol-generating article from the aerosol-forming substrate to the mouthpiece. pass through the tubular hollow body. The transfer element has at least one open end formed from one or more suitable materials that are substantially thermally stable at the temperature of the aerosol produced by the transfer of heat from the combustible heat source to the aerosol-forming substrate. It may contain a tubular hollow body. Suitable materials are known in the art and include, but are not limited to, paper, cardboard, plastics such as cellulose acetate, ceramics and combinations thereof.

Alternatively or additionally, the aerosol-generating articles described herein may include an aerosol cooling element or heat exchanger between the aerosol-forming substrate and the mouthpiece. The aerosol cooling element may include a plurality of longitudinally extending channels. The aerosol cooling element may comprise a collection of material sheets selected from the group consisting of metal foil, polymeric material and substantially non-porous paper or cardboard. In certain embodiments, the aerosol cooling element is composed of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA) and aluminum foil. It may comprise a collection of sheets of material selected from the group. Preferably, the aerosol cooling element may comprise an assembly of sheets of biodegradable polymeric material such as polylactic acid (PLA) or Mater-Bi® grades (a commercial family of starch-based copolyesters). .

The aerosol-generating articles described herein may comprise an outer wrapper surrounding at least a rear portion of the aerosol-forming substrate and heat source. The outer wrapper should grip the heat source and aerosol-forming substrate of the aerosol-generating article when the aerosol-generating article is assembled. The outer wrapper preferably surrounds the aerosol-forming substrate, at least the rear portion of the heat source, and any other components of the aerosol-generating article downstream of the aerosol-forming substrate. The outer wrapper may be formed from any suitable material or combination of materials. Suitable materials are known in the art and include, but are not limited to, cigarette paper. Alternatively or additionally, the mouthpiece may be surrounded by tipping paper.

The aerosol-generating articles described herein may be assembled using known methods and machines.

The aerosol-generating article may be substantially cylindrical in shape. The aerosol-generating article may be substantially elongated. The aerosol-forming substrate may be substantially cylindrical in shape. The aerosol-forming substrate may be substantially elongated. The aerosol-forming substrate may be positioned within the aerosol-generating article such that the length of the aerosol-forming substrate is substantially parallel to the direction of airflow within the aerosol-generating article. The moving element may be substantially elongated.

The aerosol-generating article may have any desired length. For example, the aerosol-generating article may have an overall length of approximately 65 millimeters to approximately 100 millimeters, more preferably approximately 65 millimeters to approximately 80 millimeters, and most preferably approximately 70 millimeters. The aerosol-generating article may have any desired outer diameter. For example, the aerosol-generating article may have an outer diameter of about 5 millimeters to about 12 millimeters, more preferably about 6 millimeters to about 9 millimeters, and most preferably about 7.8 millimeters.

Features described with respect to one or more embodiments or examples of the disclosure may be equally applicable to other embodiments or examples of the invention.

Embodiments of the invention will now be described, by way of example only, with reference to the following accompanying drawings.

1 is a schematic longitudinal cross-sectional view of an aerosol-generating article for use with retainers according to the present invention; FIG. FIG. 2 is a perspective view of a retainer and an aerosol-generating article received within the retainer according to an embodiment of the present invention; 3 is a perspective view of the tubular body of the retainer of FIG. 2; FIG. FIG. 4 shows a longitudinal cross-sectional view of the retainer of FIG. 2 with an aerosol-generating article received within the retainer. FIG. 5A is a longitudinal cross-sectional view of a retainer according to another embodiment of the invention showing the retainer in a first position and the aerosol-generating article received within the sleeve of the retainer; FIG. 5B is a longitudinal cross-sectional view of a retainer according to another embodiment of the invention showing the retainer and the aerosol-generating article received within the sleeve of the retainer in the second position; Figure 6 is a perspective view of a retainer according to another embodiment of the invention; FIG. 7 shows the retainer of FIG. 6 with an aerosol-generating article received within the retainer. FIG. 8A shows a cap of the retainer of FIG. 6; 8B is a longitudinal cross-sectional view of the cap of FIG. 8A. FIG. 9 shows the cap of FIG. 8A attached to the retainer of FIG. 6 with an aerosol-generating article received within the retainer. Figure 10 is a perspective view of a retainer according to another embodiment of the invention; 11A is a side view of a retainer similar to that of FIG. 10 with an aerosol-generating article received within the retainer in a first position; FIG. 11B is a side view of a retainer similar to that of FIG. 10 with an aerosol-generating article received within the retainer with the retainer in a second position; FIG. FIG. 12 is a perspective view of a retainer and an aerosol-generating article received within the retainer according to another embodiment of the present invention; 13A-13C are perspective views of alternative patterns of retainer tubular bodies according to the present invention. FIG. 13D is a perspective view of another pattern for the tubular body of the retainer. FIG. 14 is a graph showing the effect of tubular body diameter on aerosol-forming substrate temperature for four exemplary retainers according to the present invention. FIG. 15 is a graph showing the lack of effect of tubular thickness on aerosol-forming substrate temperature for four different exemplary retainers.

Referring now to FIG. 1, there is shown a schematic longitudinal cross-sectional view of an aerosol-generating article for use with retainers according to the present invention.

The aerosol-generating article 2 shown in FIG. 1 includes a combustible carbonaceous heat source 4 having a leading end face 6 and an opposing trailing end face 8 abutting in a coaxial arrangement, an aerosol-forming substrate 10, a moving element 12, an aerosol-cooling element 14, and a spacer. It comprises an element 16 and a mouthpiece 18 . As shown in FIG. 1, the aerosol-forming substrate 10, the moving element 12, and the rear portion of the combustible heat source 4 are encased by an outer wrapper 20 that is laminated together. A single laminated outer wrapper 20 includes an inner layer of paper and an outer layer of aluminum foil (not shown).

Combustible carbonaceous heat source 4 is a cylindrical blind carbonaceous combustible heat source located at the distal end of aerosol-generating article 2 . As shown in FIG. 1, a non-combustible, substantially impermeable barrier 22 in the form of a disc of aluminum foil is provided between the trailing end face 8 of the combustible carbonaceous heat source 4 and the aerosol-forming substrate 10 . be. The barrier 22 is applied to the trailing face 8 of the combustible carbonaceous heat source 4 by pressing a disk of aluminum foil onto the trailing face 8 of the combustible carbonaceous heat source 4 and Adjacent to the aerosol-forming substrate 10 .

The aerosol-forming substrate 10 is located immediately downstream of a barrier 22 applied to the trailing face 8 of the combustible carbonaceous heat source 4 . The aerosol-forming substrate 10 comprises a cylindrical plug of homogenized tobacco base material 24 containing glycerin as an aerosol former wrapped in a plug wrap 26 .

Transfer element 12 is located immediately downstream of aerosol-forming substrate 10 and comprises a cylindrical open-ended hollow cellulose acetate tube 28 .

An aerosol cooling element 14 is located immediately downstream of the moving element 12 and comprises an assembly of sheets of biodegradable polymeric material such as polylactic acid.

Spacer element 16 is located immediately downstream of aerosol cooling element 14 and comprises a cylindrical open-ended hollow paper or cardboard tube.

Mouthpiece 18 is located immediately downstream of spacer element 16 . As shown in FIG. 1, the mouthpiece 18 is located at the proximal end of the aerosol-generating article 2 and is wrapped in a filter plug wrap of suitable filtration material 30, such as very low filtration efficiency cellulose acetate tow. Includes a cylindrical plug.

Aerosol-generating article 2 further comprises a strip of tipping paper 38 surrounding the downstream end of outer wrapper 20 overlying mouthpiece 18 , aerosol-cooling element 14 , spacer element 16 and transfer element 12 .

As shown in FIG. 1, the aerosol-generating article 2 is a thermally conductive aluminum foil around and in direct contact with the rear portion 4b of the blind combustible heat source 4 and the front portion 10a of the aerosol-forming substrate 10. It further comprises an element 34 .

The aerosol-generating article 2 according to the invention shown in FIG. 1 comprises one or more primary air inlets 36 around the perimeter of the aerosol-forming substrate 10 . As shown in FIG. 1, a peripheral arrangement of first air inlets 36 is provided in the plug wrap 26 and overlying outer wrapper 20 of the aerosol-forming substrate 10 to cool air (indicated by the dashed arrow in FIG. 1). into the aerosol-forming substrate 10 .

In use, the user ignites the combustible carbonaceous heat source 4 . When the combustible carbonaceous heat source 4 is ignited, the user puffs on the mouthpiece 18 of the aerosol-generating article 2 . When the user puffs on mouthpiece 18 , cold air (indicated by the dashed arrow in FIG. 1) is drawn through first air inlet 36 and into aerosol-forming substrate 10 of aerosol-generating article 2 .

The forward portion 10a of the aerosol-forming substrate 10 is heated by conduction through the combustible carbonaceous heat source 4 and the trailing end face 8 of the barrier 22 and the thermally conductive element 34 . Heating the aerosol-forming substrate 10 by conduction releases glycerin and other volatile and semi-volatile compounds from the plug of homogenized tobacco base material 24 . The compound emitted from the aerosol-forming substrate 10 causes the aerosol entrained in the air drawn into the aerosol-forming substrate 10 of the aerosol-generating article 2 through the first air inlet 36 as it flows through the aerosol-forming substrate 10 . Form. Entrained air and entrained aerosols (indicated by dashed arrows in FIG. 1) pass through the open-ended hollow cellulose acetate tubes 28 of the transfer element 12, the aerosol cooling element 14, and the interior of the spacer element 16. through downstream where it cools and condenses. Cooled entrained air and entrained aerosol flow downstream through mouthpiece 18 and are delivered through the proximal end of aerosol-generating article 2 to the user. A non-combustible, substantially impermeable barrier 22 on the trailing end face 8 of the combustible carbonaceous heat source 4 ensures that, in use, air drawn through the aerosol-generating article 2 is in direct contact with the combustible carbonaceous heat source 4 . separate the combustible carbonaceous heat source 4 from the air drawn through the aerosol-generating article 2 so as not to

After using the aerosol-generating article 2 , the user extinguishes the combustible heat source 4 of the aerosol-generating article 2 .

FIG. 2 shows a perspective view of a retainer 100 and an aerosol-generating article 2 including a combustible heat source 4 received within retainer 100 according to an embodiment of the present invention. Retainer 100 comprises a tubular body 102 having a closed first end 104a. Tubular body 102 comprises a first portion 107 proximate first end 104 a comprising a plurality of openings 106 for allowing air to reach combustible heat source 4 . Tubular body 102 is configured to receive aerosol-generating article 2 such that multiple openings 106 surround combustible heat source 4 of aerosol-generating article 2 .

The first portion 107 of the tubular body 102 has at least about 80% of the exposed surface area of the combustible heat source 4 of the aerosol-generating article 2 through a plurality of openings in the first portion 107 of the tubular body 102 at the first location. It is configured to remain exposed through 106 . Tubular body 102 has a substantially circular cross section and is made of stainless steel. The diameter of tubular body 102 is greater than the diameter of aerosol-generating article 2 such that the ratio of the inner diameter of first portion 107 of tubular body 102 to the outer diameter of the exposed surface of combustible heat source 4 is at least about 1.2. big.

Retainer 100 further includes an open-ended impermeable sleeve 108 disposed about tubular body 102 . Tubular body 102 and sleeve 108 are configured such that plurality of openings 106 in tubular body 102 are not covered by sleeve 108 to prevent aerosol-generating article 2 from being removed from tubular body 102 through the second end. from a first position where the plurality of openings 106 in the tubular body 102 are covered by a sleeve 108 and the aerosol-generating article 2 can be removed from the tubular body 102 through the second end. It is movable in the longitudinal direction.

FIG. 3 shows tubular body 102 of retainer 100 of FIG. 2 without sleeve 108 . In addition to first end 104a and first portion 107, tubular body 102 has open second end 104b and second end 104b disposed between first portion 107 and second end 104b. Further includes a second portion 109 . A retaining member 110 is attached to the open second end 104b. Retaining member 110 is annular in shape and made of PEEK to withstand the high temperatures to which tubular body 102 is subjected. Retaining member 110 is attached to tubular body 102 by overmolding and includes a plurality of resilient fingers 112 that extend longitudinally outward beyond second end 104b of the tubular body. Fingers 112 of retaining member 110 have projections 114 located at their distal ends which project radially outwardly and which are complementary projections (not shown) located on the inner surface of sleeve 108 shown in FIG. ) are configured to engage.

FIG. 4 shows a longitudinal cross-sectional view of retainer 100 of FIG. 2 and aerosol-generating article 2 received within retainer 100 . As can be seen in FIG. 4, tubular body 102 defines a longitudinal passageway 105 extending between first end 104a and second end 104b of tubular body 102 . Aerosol-generating article 2 is received within passageway 105 of tubular body 102 such that a plurality of openings 106 surround combustible heat source 4 of aerosol-generating article 2 .

Sleeve 108 extends from tubular body 102 of aerosol-generating article 2 received within passageway 105 in the direction of arrow A in FIG. can be slid longitudinally toward a first position where removal to the end 104b of the is prevented. The sleeve 108 is also positioned in a second position where the plurality of openings 106 of the tubular body 102 are covered by the sleeve 108 and the aerosol-generating article 2 received in the passageway 105 can be removed from the tubular body 102 through the second end 104b. may be slid longitudinally in the opposite direction of arrow A toward Accordingly, tubular body 102 and sleeve 108 are longitudinally slidable relative to each other between first and second positions. In the first position the sleeve 108 overlies the second portion 109 of the tubular body 102 and in the second position the sleeve 108 overlies the first portion 107 of the tubular body 102 .

In FIG. 4, the sleeve 108 is in the process of sliding longitudinally in the direction of arrow A toward the first position. Complementary projections 116 formed on the inner surface of sleeve 108 are intended to engage projections 114 formed on fingers 112 of retaining member 100 . When complementary protrusions 116 on the inner surface of sleeve 108 engage protrusions 114 formed on fingers 112 of retaining member 110 by longitudinal movement of sleeve 108, fingers 112 are forced radially inwardly. , in contact with the aerosol-generating article 2 . Fingers 112 of retaining member 110 grip and retain aerosol-generating article 2 within tubular body 102 and prevent aerosol-generating article 2 from being removed from tubular body 102 when sleeve 108 is in the first position. The holding member 110 therefore functions as a chuck for gripping and holding the aerosol-generating article 2 . Further, the reduced radial dimension of second end 104b prevents insertion of an aerosol-generating article into tubular body 102 when sleeve 108 is in the second position.

Engagement of complementary projections 116 and projections 114 prevents further movement of sleeve 108 in the direction of arrow A and removal of sleeve 108 from tubular body 102 when sleeve 108 is in the first position. to prevent A further projection 118 located at the proximal end of sleeve 108 on the inner surface of sleeve 108 is adapted to allow the sleeve to be removed from the tubular body in the direction opposite arrow A when sleeve 108 is in the second position. to prevent

Figures 5A and 5B are longitudinal cross-sections of a retainer 200 according to another embodiment of the present invention, in which an aerosol-generating article is received within the retainer and the sleeve of the retainer is shown in first and second positions, respectively. Figure shows. The retainer 200 of FIGS. 5A and 5B is similar to that shown in FIGS. 2-4, except that the retaining member 210 is tubular rather than annular and extends further toward the proximal end of the aerosol-generating article 2. ing.

FIG. 5A shows sleeve 208 in a first position in which multiple openings 206 of tubular body 202 are not covered by sleeve 208, in which passage from tubular body 102 through second end 204b is shown. Removal of the aerosol-generating article 2 received therein is prevented. Complementary projections 216 on the inner surface of sleeve 208 engage projections 214 on retention member 210 to bring the retention member into contact with aerosol-generating article 2 to grip aerosol-generating article 2 and open the open end. 204b to prevent it from being removed. In the first position, air is free to reach the combustible heat source 4 of the aerosol-generating article 2, which is below the opening 206 of the tubular body 202, thereby igniting the combustible heat source 4. and can sustain combustion.

FIG. 5B shows a second position in which multiple openings 206 of tubular body 202 are covered by sleeve 208 and aerosol-generating articles 2 received in passageway 205 can be removed from tubular body 202 through second end 204b. shows the sleeve 208 at the . In the second position, the sleeve 208 covers the opening 206 of the tubular body 202, preventing air from entering through the closed first end 204a of the tubular body 202, thereby reducing the flammability of the aerosol-generating article 2. The amount of air reaching the heat source 4 is significantly reduced. The amount of air reaching combustible heat source 4 is not sufficient to sustain combustion. The sleeve 208 can thus be slid to the second position to extinguish the aerosol-generating article 2 . Further, in the second position, complementary protrusions 216 on the inner surface of sleeve 208 are disengaged from protrusions 214 on retention member 210 and the retention member is no longer brought into contact with aerosol-generating article 2; Aerosol-generating article 2 may be removed through open end 204b when combustible heat source 4 is extinguished.

In use, retainers 100, 200 of FIGS. is in the second position and then inserting the aerosol-generating article through the open end 104b, 204b of the tubular body 102, 202 when the sleeve 108, 208 moves to the first position to hold the aerosol-generating article. can be done. Indicia may be printed or formed on the outer surface of the aerosol-generating article to indicate correct positioning of the aerosol-generating article 2 in the retainer 100,200.

The user holds the combination of aerosol-generating article 2 by retainers 100, 200 and sleeves 108, 208 between his fingers and heats combustible heat source 4 through a plurality of openings 106, 206 formed in tubular body 102, 202. Ignite the tip. Once the combustible heat source 4 is ignited, the user can pick up the puff on the aerosol-generating article 2 . A thermochromic ink or coating can be applied to the outer surface of tubular body 102, 202 to indicate to the user when combustible heat source 4 is at a temperature at which it can initiate a puff.

When the user has finished drawing the puff, the combustible heat source 4 causes the plurality of openings 106, 206 in the tubular body 102, 202 to open by moving the sleeves 108, 208 from the first position to the second position. As covered by the sleeves 108, 208, the fire can be extinguished. Once the combustible heat source 4 is extinguished, the aerosol-generating article 2 can be removed from the retainers 100, 200 and safely disposed of. A thermochromic ink or coating can be applied to the outer surface of the sleeve 108, 208 to indicate that the temperature of the combustible heat source has dropped to a temperature indicating that the combustible heat source has been extinguished. The retainer may be retained for use with another aerosol-generating article.

FIG. 6 is a perspective view of a retainer 300 for an aerosol-generating article, according to another embodiment of the invention. Retainer 300 comprises a tubular body 302 having a partially closed first end 304a and an open second end 304b. A longitudinal passageway 305 for receiving an aerosol-generating article extends between first end 304a and second end 304b. Passageway 305 is configured to receive an aerosol-generating article through second end 304b, which is inserted in a direction from second end 304b toward first end 304a. Tubular body 302 includes a first portion 307 proximate first end 304a and has a plurality of openings 306 and a second portion 309 between first portion 307 and second end 304b. Prepare.

FIG. 7 shows the retainer of FIG. 6 with aerosol-generating article 2 received within retainer 300 . Aerosol-generating article 2 is received in passageway 305 such that first portion 307 of tubular body 302 surrounds both combustible heat source 4 and aerosol-forming substrate 10 of aerosol-generating article 2 . Thus, the plurality of openings 306 formed in the first portion 307 of the tubular body 302 allow air to pass through the combustible heat source 4 and the air inlet (FIG. 4) formed in the aerosol-generating article 2 in the region of the aerosol-forming substrate 10 . not shown).

The opening 306 in the first portion 307 of the tubular body 302 surrounding the combustible heat source 4 is defined by four projections 318 evenly spaced around the circumference of the tubular body 302 . Protrusion 318 is bent at first end 304a to partially close first end 304a. The opening 306 in the first portion 307 of the tubular body 302 surrounding the combustible heat source 4 is about 90% of the exposed surface area of the combustible heat source 4 of the aerosol-generating article 2 when the aerosol-generating article 2 is received in the passageway 305. remains exposed through a plurality of openings 306 in first end 304 a and first portion 307 of tubular body 302 . The first portion 307 of the tubular body 302 is made of stainless steel and the protrusions 318 are slightly recessed within the passageway 305 to minimize contact between the combustible heat source 4 and the tubular body 302 . Orientation is angled.

Tubular body 302 has a substantially circular cross section. The diameter of tubular body 302 is greater than the diameter of aerosol-generating article 2 such that the ratio of the inner diameter of first portion 307 of tubular body 302 to the outer diameter of the exposed surface of combustible heat source 4 is at least about 1.2. big.

Second portion 309 of tubular body 302 is configured to be held by a user when aerosol-generating article 2 is received in passageway 305 . The second portion 309 is formed from PEEK or an elastomeric material such as silicone or polyurethane.

FIG. 8A shows cap 320 of retainer 300 of FIG. Cap 320 comprises a hollow cylinder 322 having a closed first end 324a and an open second end 324b. Cylindrical body 322 defines a longitudinal recess 326 for receiving first portion 307 of tubular body 302 of retainer 300 . The length and inner diameter of recess 326 are sized to completely receive first portion 307 of tubular body 302 of retainer 300 and to fit closely around the outer surface. A proximal end of cap 320 is configured to overlap a distal portion of second portion 309 of tubular body 302 of retainer 300 . Cap 320 is maintained in place on retainer 300 by a snap-fit connection (not shown).

8B is a longitudinal cross-sectional view of the cap of FIG. 8A. Cap 320 has an inner layer 328 disposed inside recess 326 and at the distal end of recess 326 . The inner layer conforms to the interior shape of recess 326 and is configured to fit over first portion 307 of tubular body 302 of retainer 300 . The inner layer 328 is formed from aluminum having a high thermal conductivity and is arranged to absorb heat from the combustible heat source 4 to facilitate extinguishing the combustible heat source 4 . Inner layer 328 has a closed end 328a that is substantially thicker than the rest of inner layer 328 . Closed end 328 a is positioned to act as a heat sink for heat absorbed from combustible heat source 4 . The cylindrical body 322 of the cap 320 has a second layer made of PEEK with low thermal conductivity to reduce heat transfer to the outer surface of the cap 320 so that the cap 320 can be comfortably held by the user. Form.

9 shows cap 320 of FIG. 8A attached to retainer 300 of FIG. 6 with aerosol-generating article 2 received within retainer 300. FIG. Cap 320 is positioned over first portion 307 of tubular body 302 of retainer 300 . A plurality of openings (not visible) formed in the first portion 307 of the tubular body 302 are closed by the cap so that the amount of air reaching the combustible heat source of the aerosol-generating article 2 is greatly reduced. covered. In this arrangement combustion can no longer be sustained and the combustible heat source is extinguished.

In use, an aerosol-generating article is inserted through open end 304 b of tubular body 302 of retainer 300 . Indicia may be printed or formed on the outer surface of the aerosol-generating article 2 to indicate correct positioning of the aerosol-generating article 2 within the retainer 300 . The user holds the combination of retainer 300 and aerosol-generating article 2 by second portion 309 of tubular body 302 between fingers and applies combustible heat source 4 through a plurality of openings 306 formed in tubular body 302 . ignite the tip of the Once the combustible heat source 4 is ignited, the user can pick up the puff on the aerosol-generating article 2 . A thermochromic ink or coating can be applied to the outer surface of tubular body 302 to indicate to the user when the combustible heat source is at a temperature at which it can initiate a puff.

By placing the cap 320 over the first portion 307 of the tubular body 302 of the retainer 300 such that the plurality of openings 306 of the tubular body 302 are covered by the cap 320 when the user has finished puffing on the puff. , the combustible heat source 4 can be extinguished. Once the combustible heat source 4 is extinguished, the aerosol-generating article 2 can be removed from the retainer 300 and safely disposed of. A thermochromic ink or coating may be applied to the outer surface of cap 320 to indicate that the temperature of the combustible heat source has decreased to a temperature indicating that the combustible heat source has been extinguished. Retainer 300 may be retained for use with another aerosol-generating article.

FIG. 10 shows a perspective view of a retainer 400 according to another embodiment of the invention. Retainer 400 is very similar to retainer 300 shown in FIG. Retainer 400 comprises a tubular body 402 having a partially closed first end 404a and an open second end 404b. A longitudinal passageway 405 for receiving an aerosol-generating article extends between first end 404a and second end 404b. Passageway 405 is configured to receive an aerosol-generating article through second end 404b, which is inserted in a direction from second end 404b toward first end 404a. Tubular body 402 has a first portion proximate first end 404a including a plurality of openings 406 and a second portion 409 between first portion 407 and second end 404b. 407.

Passageway 405 defines tubular body 402 and the aerosol-generating article at a first location where first portion 407 of tubular body 402 surrounds the combustible heat source of the aerosol-generating article, and second portion 409 of tubular body 402 surrounds the aerosol-generating article. The articles are configured to be longitudinally moveable relative to each other between a second position surrounding the combustible heat source of the article. The plurality of openings 406 in the first portion 407 are configured to allow airflow to the aerosol-forming substrate of the combustible heat source and the aerosol-generating article when the tubular body 402 and the aerosol-generating article are in the first position. be done. Second portion 409 is configured to inhibit combustion of the combustible heat source of the aerosol-generating article when tubular body 402 and the aerosol-generating article are in the second position.

Retainer 400 of FIG. 10 differs from retainer 300 of FIG. 6 in that second portion 409 comprises multiple layers. The second portion 409 includes an inner layer (not shown) formed from aluminum having high thermal conductivity to facilitate extinguishing the combustible heat source when the tubular body and aerosol-generating article are in the second position. arranged to absorb heat from a combustible heat source in order to The inner layer acts as a heat sink to absorb heat from the combustible heat source. Second portion 409 is made of silicone or PEEK, which has low thermal conductivity to reduce heat transfer to the outer surface of second portion 409 so that second portion 409 can be comfortably held by a user. Further includes outer layer 411 . A portion of the outer layer 411 extends proximally a distance beyond the inner layer (not shown). Outer layer 411 is formed from a resilient material, silicone, so that the extended portion can grip an aerosol-generating article received in passageway 405 .

11A and 11B show aerosol-generating article 2 received within passageway 405 of retainer 400 and second portion 409 of tubular body 402 of retainer 400 in first and second positions, respectively. 11 shows a side view of a retainer similar to FIG. 10; FIG. The retainer 400 of FIGS. 11A and 11B differs from the retainer 400 of FIG. 10 only in that it employs a different arrangement of openings 406 in the first portion 407 of the tubular body 402 .

FIG. 11A shows a second portion of tubular body 402 of retainer 400 with multiple openings 406 in first portion 407 of tubular body 402 in a first position surrounding combustible heat source 4 of aerosol-generating article 2 . 409 is shown. In the first position, air is free to reach the combustible heat source 4 of the aerosol-generating article 2, which is the first position of the tubular body 402 so that the combustible heat source 4 can be ignited and combustion sustained. under the opening 406 in the portion of the .

FIG. 11B shows second portion 409 of tubular body 402 of retainer 400 in a second position, where second portion 409 surrounds the combustible heat source (not visible) of aerosol-generating article 2 . In the second position, the amount of air reaching the combustible heat source of aerosol-generating article 2 is significantly reduced because second portion 409 of tubular body 402 is impermeable. The amount of air reaching the combustible heat source is insufficient to sustain combustion. Accordingly, tubular body 402 and aerosol-generating article 2 can be slid relative to each other to a second position to extinguish aerosol-generating article 2 . Once the combustible heat source is extinguished, the aerosol-generating article 2 can be removed through the open end 404b of the tubular body 402 of the retainer 400. FIG.

In use, the aerosol-generating article 2 is inserted through the open end 404b of the tubular body 402 of the retainer 400, and the tubular body and the aerosol-generating article are aligned so that the plurality of openings 406 in the first portion 407 of the tubular body 402 are exposed to the aerosol. The generating articles 2 slide relative to each other to a first position surrounding the combustible heat source 4 . Indicia may be printed or formed on the outer surface of the aerosol-generating article 2 to indicate correct positioning of the aerosol-generating article 2 within the retainer 400 . The user holds the combination of retainer 400 and aerosol-generating article 2 by means of second portion 409 of tubular body 402 between fingers and heats a combustible heat source through multiple openings 406 formed in tubular body 402 . Light the tip of 4. Once the combustible heat source 4 is ignited, the user can pick up the puff on the aerosol-generating article 2 . A thermochromic ink or coating may be applied to the outer surface of tubular body 402 to indicate to the user when the combustible heat source is at a temperature at which it can initiate a puff.

Once the user has finished puffing, the combustible heat source 4 moves the tubular body and the aerosol-generating article to a second position where the second portion 409 surrounds the combustible heat source 4 of the aerosol-generating article 2. They can be erased by sliding them against each other. Once the combustible heat source 4 is extinguished, the aerosol-generating article 2 can be removed from the retainer 400 and safely disposed of. A thermochromic ink or coating is applied to the outer surface of the second portion 409 of the tubular body 402 to indicate when the temperature of the combustible heat source has dropped to a temperature indicating that the combustible heat source has been extinguished. good too. Retainer 400 may be retained for use with another aerosol-generating article.

FIG. 12 shows a perspective view of a retainer 500 and an aerosol-generating article 2 received within the retainer 500 according to another embodiment of the invention. Retainer 500 of FIG. 12 is similar to retainer 500 of FIG. 6, except second portion 509 of tubular body 502 includes opening 513 to allow a user to contact the outer surface of aerosol-generating article 2 when received in the passageway. is the same as the retainer 300 of . Retainer 500 of FIG. 12 is used in the same manner as retainer 300 of FIG. Extinguishing of the combustible heat source 4 of the aerosol-generating article 2 is by means of a cap, such as the cap 320 shown in FIG. 8A.

13A-13C illustrate four alternative patterns 600a-600c for forming a partially closed first end 604a and openings 606 of a first portion of tubular body 602 of a retainer according to the present invention. shows a perspective view of. The amount of exposed surface of the combustible heat source that remains exposed through the openings 606 formed in the first portion of the tubular body 602 and formed in the partially closed first ends of the patterns 600a-600c is: At least 80%. The patterns 600a-600c of Figures 13A-13C may be used with any of the retainer embodiments described herein.

FIG. 13D shows a perspective view of another pattern 600d for forming a partially closed first end 604a and openings 606 in the first portion of the tubular body 602 of the retainer. The amount of exposed surface of the combustible heat source that remains exposed through opening 606 formed in the first portion of tubular body 602 and formed in the partially closed first end of pattern 600d is about 50. %.

First end 604a of FIGS. 13A, 13C and 13D is partially closed by a plurality of projections 618. FIG. Protrusion 618 allows air to flow through first end 604a to a combustible heat source, but prevents insertion or removal of an aerosol-generating article from the passageway through first end 604a. Allowing air to flow through the first end 604a to the combustible heat source facilitates illumination and sustained combustion of the combustible heat source. The protrusions of at least FIGS. 13A and 13D are configured to contact a combustible heat source and act as a stop to prevent further insertion of the aerosol-generating article. To minimize heat loss from the combustible heat source, the protrusions 618 of FIGS. 13A and 13D are positioned within the passageway receiving the aerosol-generating article such that only the tips of the protrusions 618 contact the combustible heat source. angled.

FIG. 13B shows that first end 604a is partially closed by a cross-shaped element placed across passageway 605 at first end 604a that performs the same function as the protrusions of FIGS. 13A, 13C and 13D; Shows a different arrangement.

When used with an aerosol-generating article, the retainer shall not significantly adversely affect illumination time or aerosol delivery of the aerosol-generating article. To determine the effect of retainers, exemplary retainers according to the present invention were prepared from stainless steel tubes having the properties shown in Table 1 below. As shown in Table 1, exemplary retainers were prepared with two different tube patterns formed from the first portion of the tubular body, tube pattern 600c in FIG. 13C and tube pattern 600d in FIG. 13D.

The exemplary retainers of Table 1 were used with a reference aerosol-generating article. The impact of using an exemplary retainer with a reference aerosol-generating article was compared to the performance of a reference aerosol-generating article used without retainers.

Properties of the reference aerosol-generating articles are shown in Table 2 below.

Effect of Tube Pattern on Illumination Time To evaluate the effect of the tube pattern of an exemplary retainer on the illumination time of the aerosol-generating article, the first end of the tubular body was measured when the aerosol-generating article was received in the passageway. The percentage of the exposed surface area of the combustible heat source of the aerosol-generating article that remained exposed through the plurality of openings in the portion and the first portion was calculated. In the reference aerosol-generating article, a 5.5 millimeter long combustible heat source is exposed and available for combustion. As noted above, the percentage is calculated by considering the total external surface of the tubular body over a portion of the combustible heat source combustion zone. The percentage is the percentage of tubular body surface removed by forming the opening and partially closed first end relative to the total tubular body surface covering the exposed surface area of the heat source.

To determine the illumination time of the combustible heat source, a reference aerosol-generating passageway was received within the passageway of the tubular body of each exemplary retainer and a yellow flame was applied to the tubular body above the combustible heat source. Lighting time was determined by measuring the time that elapsed between the time the yellow flame was applied and the time it was visually observed that ignition was beginning to propagate through the heat source. Lighting time was measured using a stopwatch. The results are shown in Table 3 below.

As can be seen from Table 3, the average percentage of combustible heat sources (CHS) remaining exposed through the opening formed in the first portion of the tubular body and the partially closed first end of the example In Examples 1-5, it is about 50%, and in Examples 6-10, it is about 80%. As shown in Table 1, Examples 1-5 all have a tube pattern 600d and Examples 6-10 all have a tube pattern 600c. Although Examples 1-5 all have the same tube pattern, it can be seen from Table 3 that there is a small difference between the proportions of Examples 1-5. These are due to manufacturing tolerances forming the opening and the partially closed first end and are acceptable. The same applies to Examples 6-10.

Table 3 shows that Examples 6-10, in which about 80% of the exposed surface area of the combustible heat source remains exposed through the openings, exhibit lighting times of about 5 seconds or less. This is considered an acceptable lighting time because it does not unduly delay the user from using the aerosol-generating article compared to the lighting time of the reference aerosol-generating article alone without the retainer. Table 3 also shows that Examples 1-5, in which approximately 50% of the exposed surface area of the combustible heat source remains exposed through the openings, exhibit significantly longer and unacceptable lighting times. Accordingly, the proportion of the exposed surface of the combustible heat source that remains exposed through the opening formed in the first portion of the tubular body and the partially closed first end is determined by the lighting time of the combustible heat source. To provide a retainer that does not have a significant adverse effect.

Effect of Tube Diameter on Aerosol Delivery and Temperature Using exemplary retainers 7, 8, 9 and 10, the effect of tubular body inner diameter on aerosol delivery is compared to aerosol delivery from the reference aerosol-generating article alone without retainers. and evaluated. Each of these exemplary retainers has the same tube pattern, namely tube pattern 600c in FIG. 13C. The percentage of the exposed surface of the combustible heat source remaining exposed through the opening formed in the first portion of the tubular body and formed in the partially closed first end is about 80%, and four Constant for all examples. The inner diameter and thickness of the tubular body vary in each exemplary retainer, as shown in Table 1 above and Table 4 below. However, as discussed further below, it was found that the thickness of the tubular body did not affect aerosol delivery for the range of thicknesses investigated. Therefore, the results of this study show the effect on aerosol delivery from varying inner diameters only.

The effect of varying tubular body diameter on aerosol delivery was measured. In particular, effects on glycerin, nicotine, and total particulate matter (TPM) levels were measured. Total particulate matter is a measure of the total amount of aerosol produced in the puff and includes the amount of glycerin and nicotine produced. The results are shown in Table 4 below, compared to the reference aerosol-generating article.

As can be seen from Table 4, none of the exemplary retainers 7-10 significantly adversely affect aerosol delivery when used with an aerosol-generating article. In fact, it has actually been found that the use of retainers with aerosol-generating articles improves aerosol delivery, at least in terms of total particulate matter, compared to reference aerosol-generating articles. The results in Table 4 show that total particulate matter delivery increases with increasing diameter.

The effect of varying the inner diameter of the tubular body of exemplary retainers 7-10 on the temperature within the aerosol-forming substrate was also evaluated. As discussed further below, it was found that the thickness of the tubular body did not affect the temperature within the aerosol-forming substrate for the range of thicknesses investigated. Therefore, the results of this test show the effect on temperature from the varying inner diameter only.

To measure the temperature within the aerosol-forming substrate, a thermocouple was inserted into the aerosol-forming substrate at a distance of 7 millimeters from the interface of the aerosol-forming substrate and the combustible heat source. The results are shown in FIG.

As can be seen from Figure 14, the temperature of the tobacco plug (i.e., the aerosol-forming substrate) increases with tubular body diameter in the range of 9.2 millimeters to 11.4 millimeters, which the inventors believe is consistent with aerosol delivery. I think it will bring about an increase.

Surprisingly, it has been found that the heat generated by the combustible heat source is better maintained due to the presence of the retainer. A proportion of the heat that would otherwise be lost to the ambient air is transferred to the tubular body and returns to the aerosol-generating article via radiation and/or air convection from the tubular body. As a result, the temperature of the aerosol-generating article is higher than it would be without the retainer. Due to the same effect, the temperature of the proximal portion of the combustible heat source may also be high. In that case, the heat transferred to the aerosol-forming substrate by conduction increases.

Effect of Tubular Thickness on Aerosol Delivery and Temperature To evaluate the effect of retainer tubular body thickness on aerosol delivery and temperature, four additional example retainers (examples of retainers 11-14) were tested in Table 5 below. were prepared with stainless steel tubular bodies of the same diameter but different thicknesses ranging from 40 micrometers to 300 micrometers, as shown in FIG.

The effect of varying tubular body thickness on aerosol delivery was measured. In particular, effects on glycerin, nicotine, and total particulate matter (TPM) levels were measured. The results are shown in Table 5 below, compared to the reference aerosol-generating article.

As can be seen from Table 5, exemplary retainers 11-14 provide a general increase in aerosol delivery when used in conjunction with an aerosol-generating article compared to the reference aerosol-generating article alone. The increase is due to the presence of an exemplary retainer tubular body having an inner diameter of 11 millimeters. There is no clear effect of tubular body thickness on aerosol delivery in the thickness range investigated.

The effect of varying the tubular body thickness of exemplary retainers 11-14 on the temperature within the aerosol-forming substrate was also evaluated. To measure the temperature within the aerosol-forming substrate, a thermocouple was inserted into the aerosol-forming substrate at a distance of 7 millimeters from the interface of the aerosol-forming substrate and the combustible heat source. The results are shown in FIG.

As can be seen from FIG. 15, the temperature of the tobacco plug (ie, the aerosol-forming substrate) is higher for all exemplary retainers of Examples 11-14 compared to the reference aerosol-generating article. Again, the increase is due to the presence of the tubular body of the exemplary retainer having an inner diameter of 11 millimeters. There is no clear effect of tubular body thickness on temperature in the thickness range investigated.

Naturally, the tube thickness is preferably between 100 micrometers and 250 micrometers in order to increase the mechanical stability of the tubular body of the retainer.

Claims (15)

is a kit,
an aerosol-generating article comprising a combustible heat source and an aerosol-forming substrate;
A retainer for the aerosol-generating article, comprising:
A tubular body having a partially closed first end and an open second end, a longitudinal passage extending between said first end and said second end and the tubular body defines
a first portion proximate the first end including a plurality of openings;
a retainer comprising a tubular body including a second portion between the first portion and the second end;
the tubular body is configured to at least partially receive the aerosol-generating article within the passageway, the first portion of the tubular body surrounding the combustible heat source of the aerosol-generating article;
The aerosol-generating article is in the passageway such that the first end and the first portion of the tubular body surround the combustible heat source of the aerosol-generating article. When received, at least about 80% of the exposed surface area of the combustible heat source of the aerosol-generating article remains exposed through the plurality of openings in the first end and the first portion of the tubular body. is configured to be
A kit, wherein the ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.1. the combustible heat source of the aerosol-generating article when the aerosol-generating article is received in the passageway such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article; 2. The kit of claim 1, wherein about 80% to about 90% of the exposed surface area remains exposed through the plurality of openings in the first end and the first portion of the tubular body. 3. The kit of claim 1 or 2, wherein the ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.16. 4. The kit of claim 3, wherein the ratio of the inner diameter of said first portion of said tubular body to the outer diameter of said exposed surface of said combustible heat source is between about 1.16 and about 1.6. The kit of any of claims 1-4, wherein the ratio of the inner diameter of the first portion of the tubular body to the outer diameter of the exposed surface of the combustible heat source is at least about 1.2. said tubular body at least partially receiving said aerosol-generating article within said passageway such that said first portion of said tubular body surrounds said combustible heat source and said aerosol-forming substrate of said aerosol-generating article; The kit according to any one of claims 1 to 5, which consists of: When the aerosol-generating article is received within the passageway such that the first portion of the tubular body surrounds the combustible heat source of the aerosol-generating article, the second portion of the tubular body is adapted to be used by a user. A kit according to any one of claims 1 to 6, configured to be held by. A kit according to any preceding claim, wherein said second portion of said tubular body comprises an outer layer having a thermal conductivity of 0.5 Wm ^-1 K ^-1 or less. 9. Any one of claims 1 to 8, wherein said second portion of said tubular body comprises an opening that allows a user to contact an outer surface of said aerosol-generating article when received in said passageway. Kit as described. At least one reversible thermochromic further comprising a thermal indicator provided on the outer surface of the tubular body, the thermal indicator undergoing a reversible visible color change when the temperature of the thermal indicator increases to a switching temperature. A kit according to any one of claims 1 to 9, comprising materials. 11. Any one of claims 1-10, further comprising an impermeable cap, said cap configured to fit over said first end and said first portion of said tubular body of said retainer. A kit as described above. 12. The kit of Claim 11, wherein the cap comprises an inner layer having a thermal conductivity of at least 120 Wm ^- 1K ^-1 . 13. Kit according to claim 11 or 12, wherein the cap comprises an outer layer having a thermal conductivity of 0.5 Wm ^- 1K ^-1 or less. The kit of any one of claims 11-13, wherein the cap comprises one or more phase change materials. 15. The first portion of the tubular body of the cap and retainer configured to be detachably coupled to each other via a snap-fit connection. kit.

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