WO2025228776A1

WO2025228776A1 - Hollow retention tube with longitudinal retention element

Info

Publication number: WO2025228776A1
Application number: PCT/EP2025/061186
Authority: WO
Inventors: Antonio CONSOLANTE
Original assignee: Philip Morris Products SA
Current assignee: Philip Morris Products SA
Priority date: 2024-04-30
Filing date: 2025-04-24
Publication date: 2025-11-06
Anticipated expiration: 2026-10-30

Abstract

The invention relates to an aerosol-generating article, the aerosol-generating article comprising an upstream end, a downstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a retention section, the retention section comprising: a hollow retention tube; and a longitudinal retention element, wherein the longitudinal retention element is arranged within the hollow retention tube, a substrate portion containing an aerosol forming substrate, wherein the retention section is arranged downstream from and in contact with the substrate portion, wherein the longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

Description

HOLLOW RETENTION TUBE WITH LONGITUDINAL RETENTION ELEMENT

The present invention relates to an aerosol-generating article with a hollow retention tube with a longitudinal retention element.

Aerosol-generating articles in which an aerosol-generating substrate, such as a tobacco-containing substrate, is heated rather than combusted, are known in the art. Typically, in such heated aerosol-generating articles an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.

A number of aerosol-generating articles for consuming heated aerosol-generating articles are known in the art. Such devices include, for example, electrically heated aerosolgenerating articles in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating article to the aerosol-generating substrate of a heated aerosol-generating article. For example, electrically heated aerosol-generating articles have been proposed that comprise an internal resistive heater blade which is adapted to be inserted into the aerosol-generating substrate. As an alternative, inductively heatable aerosol-generating articles comprise a susceptor element arranged within the aerosolgenerating substrate that can be heated by an alternating magnetic field provided by the aerosol-generating article.

Heated aerosol-generating articles are typically cigarette-shaped and comprise a plurality of elements or plugs. For example, such articles typically comprise a substrate plug including an aerosol-generating substrate, a tubular plug downstream of the substrate plug and a mouthpiece filter plug at a mouth end of the article. The tubular plug has an internal cavity or empty core that defines an airflow pathway. It is known to have two tubular elements: a first tubular element that functions as a spacer between the substrate plug and other components of the aerosol-generating article; and a separate second tubular element that functions as an air cooler for cooling air as it passes through the aerosol-generating article to help form an aerosol. The second tubular element generally abuts the first tubular element.

Aerosol-generating articles in the form of inhaler articles, such as dry powder inhalers, are known in the art. Some dry powder inhalers have a component for storing the dry powder, such as a capsule. The capsule may be activated by being pierced by a separate piercing element, such as a piercing element of a holder. Once the capsule has been activated, a consumer may draw on a mouth end of the inhaler to generate an air flow through the inhaler. Each air flow from each inhalation may carry a portion of the dry powder from the capsule to the lungs of the user. Such aerosol-generating articles may generate an aerosol without heating.

It is known to provide retention plugs identified as first and second tubular elements, which are currently crafted from cellulose acetate containing plasticizers. There is a need to transition to more environmentally sustainable materials.

For heated aerosol-generating articles, both first and second tubular elements function as cooling sections, facilitating the gradual decrease in aerosol temperatures as they traverse the length of the article. Moreover, they aid in maintaining the sensorial media within the sensorial media rod in position.

Optional perforations present in the second tubular element section enable the introduction of air from the ambient environment, thereby assisting in cooling the aerosol to an inhalation-acceptable level. The larger diameter of the second tubular element relative to the first tubular element creates a larger chamber for introducing ambient air, which, introduced as a side stream, generates vortices, thereby enhancing aerosol homogenization before inhalation.

Furthermore, the cellulose acetate material exhibits sufficient resistance to moisture breakdown, enabling the first and second tubular elements to endure exposure to aerosol- contained moisture while safeguarding the more fragile paper overwrap and tipping paper.

Both first and second tubular elements must possess adequate strength in axial compression to maintain rigidity during the manufacturing assembly process, especially during the application of the Paper Overwrap. They should also withstand radial compression to reliably support the force exerted by users when squeezing the stick during handling and use.

It would be desirable to replace the first and second tubular elements components with a recyclable or biodegradable solution. It would be desirable to not significantly alter key product parameters including the manufacturing equipment, method, efficiency, as well as maintaining product performance, reliability, aerosol characteristics, and cost.According to an embodiment of the invention there is provided an aerosol-generating article. The aerosolgenerating article may comprise an upstream end and a downstream end. The upstream end may be configured to be connectable to a holder for the aerosol-generating article. The aerosol-generating article may comprise a retention section. The retention section may comprise a hollow retention tube and a longitudinal retention element. The longitudinal retention element may be arranged within the hollow retention tube. The aerosol-generating article may comprise a substrate portion containing an aerosol forming substrate. The retention section may be arranged downstream from and in contact with the substrate portion. The longitudinal retention element may be configured to longitudinally retain the substrate portion within the aerosol-generating article.

The term “aerosol-generating article” is used herein to denote an article in which an inhalable aerosol is generated from an aerosol-generating substrate and delivered to a consumer. As used herein, the term “aerosol-generating substrate” denotes a substrate from which an aerosol can be formed or generated. For example, the aerosol-generating substrate may be capable of releasing volatile compounds upon heating to generate an aerosol. Alternatively, the aerosol-generating substrate may comprise particles that can be entrained in an airflow to generate an aerosol.

For heated aerosol-generating articles, as used herein, the term “retention section” also denotes a designated portion or area within the aerosol-generating article, where the aerosol cools down. This section is specifically intended to regulate the flow of the aerosol to reduce the temperature, thereby optimizing its performance, enhancing user comfort, or achieving desired operational conditions.

As used herein, the term " hollow retention tube " denotes a generally hollow elongate element defining a lumen or airflow passage along a longitudinal axis thereof. In particular, the term "tube" will be used with reference to a tubular element having a substantially cylindrical cross-section and defining at least one airflow conduit establishing an uninterrupted fluid communication between an upstream end of the hollow retention tube and a downstream end of the hollow retention tube. However, it will be understood that alternative geometries (for example, alternative cross-sectional shapes) of the tubular element may be possible. The hollow retention tube is an individual, discrete component of the aerosol-generating article.

As used herein, the terms “upstream” and “downstream” describe the relative positions of elements, or portions of elements, of the aerosol-generating article in relation to the direction in which the aerosol is transported through the aerosol-generating article during use.

As used herein, the term “longitudinal retention element” denotes a part of the aerosolgenerating article that ensures the substrate portion stays in position within the device, likely to optimize the efficiency and effectiveness of aerosol generation. It likely prevents the substrate from moving or shifting within the device during operation.

According to an embodiment of the invention there is provided an aerosol-generating article. The aerosol-generating article comprises an upstream end and a downstream end. The downstream end is configured to be connectable to a holder for the aerosol-generating article. The aerosol-generating article comprises a retention section. The retention section comprises a hollow retention tube and a longitudinal retention element. The longitudinal retention element is arranged within the hollow retention tube. The aerosol-generating article comprises a substrate portion containing an aerosol forming substrate. The retention section is arranged upstream from and in contact with the substrate portion. The longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

The hollow retention tube may comprise cardboard, preferably consists of cardboard. Using cardboard for the hollow retention tube in the aerosol-generating article may contribute to environmental sustainability as cardboard is renewable and biodegradable. This may reduce the environmental impact of products. Cardboard production typically requires fewer resources and energy compared to alternative materials, reducing the overall environmental footprint of the article. Cardboard is safe and non-toxic, ensuring user safety without the presence of harmful chemicals. Additionally, it is cost-effective, potentially reducing production costs and making the article more affordable for consumers. Cardboard is customizable and printable, allowing for branding and visual enhancements to promote brand recognition. A hollow retention tube comprising cardboard may provide environmental, safety, cost, and branding advantages. The hollow retention tube consisting of cardboard may comprise glue.

The longitudinal retention element may comprise cardboard, preferably may consist of cardboard. Cardboard is easily customizable, allowing manufacturers to tailor the retention element to fit specific design requirements. The use of cardboard for the longitudinal retention element may offer benefits in terms of sustainability, safety, cost-effectiveness, customizability, and recyclability, making it a favorable choice for the aerosol-generating article. The longitudinal retention element consisting of cardboard may comprise glue.

The longitudinal retention element may comprise at least one perforation. Integrating at least one perforation in the longitudinal retention element of the aerosol-generating article may promote airflow within the device, which may enhance cooling and overall performance. Perforations may facilitate the mixing of ambient air with the aerosol, ensuring a consistent aerosol composition for a better vaping experience. Perforations may assist in regulating the temperature of the aerosol, preventing overheating and discomfort. The inclusion of perforations may improve airflow, aerosol quality, and temperature regulation, enhancing the overall vaping experience.

The longitudinal retention element may comprise at least one cutout. Including at least one cutout in the longitudinal retention element of the aerosol-generating article may facilitate airflow within the device, enhancing cooling and overall performance. Cutouts may promote the mixing of ambient air with the aerosol, ensuring a consistent aerosol composition for a better vaping experience. They may assist in regulating the temperature of the aerosol, preventing overheating and discomfort.

The hollow retention tube may comprise at least one perforation allowing ambient air to be laterally drawn into the retention section. This configuration may enhance airflow within the device, facilitating efficient cooling of the aerosol and ensuring a smoother vaping experience. The intake of ambient air may help regulate the temperature of the aerosol, preventing overheating and maintaining a consistent vaping temperature. It may improve aerosol quality by promoting the mixing of ambient air with the aerosol stream, resulting in a more uniform aerosol composition.

The longitudinal retention element may be attached to the hollow retention tube. Attaching the longitudinal retention element to the hollow retention tube in the aerosolgenerating article may enhance the structural integrity of the aerosol-generating article, ensuring stability and preventing deformation during use. It may securely hold the substrate portion in place, facilitating consistent aerosol generation. It may streamline the manufacturing process, saving time and resources.

The longitudinal retention element may comprise attachment portions, configured to attach the longitudinal retention element to an inner wall of the hollow retention tube, preferably via glueing. Including attachment portions in the longitudinal retention element to attach it to the inner wall of the hollow retention tube, preferably via gluing, may ensure a secure and permanent connection, enhancing the stability and structural integrity of the device. It may simplify the assembly process, reducing manufacturing time and costs. Additionally, gluing the attachment portions may promote efficient airflow within the aerosol-generating article, contributing to optimal cooling and aerosol generation. It may enhance durability by withstanding forces during handling and use. The attachment may provide advantages in terms of secure attachment, stability, simplified assembly, improved airflow, and enhanced durability, improving the overall performance and reliability of the aerosol-generating article.

The aerosol-generating article may further comprise a front plug, wherein the front plug is arranged downstream from the substrate portion. Including a front plug in the aerosolgenerating article, positioned downstream to the substrate portion, may provide structural support and may help secure the substrate within the aerosol-generating article, ensuring stability during use. The front plug may help maintain the integrity of the aerosol-generating article by preventing any potential movement or displacement of the substrate portion.

The longitudinal retention element may comprise a central support point arranged on a longitudinal central axis of the aerosol-generating article, preferably on an abutting plane of the retention section and the substrate portion. Incorporating a central support point in the longitudinal retention element of the aerosol-generating article, positioned along the longitudinal central axis and preferably on an abutting plane of the retention section and the substrate portion, may provide structural reinforcement, ensuring stability and preventing deformation or misalignment of components during use. The central support point may help distribute forces evenly along the longitudinal axis, enhancing overall durability and reliability. Additionally, positioning it on the abutting plane of the retention section and the substrate portion may ensure optimal alignment between critical elements. Overall, the central support point may contribute to the stability, structural integrity, and alignment of the aerosolgenerating article, enhancing its performance and longevity.

The aerosol-generating article may further comprise a central susceptor strip.

As used herein, the term “susceptor” refers to a material that can convert electromagnetic energy into heat. When located within a fluctuating electromagnetic field, eddy currents induced in the susceptor cause heating of the susceptor.

The susceptor is arranged in thermal contact with the aerosol-generating substrate. Thus, when the susceptor heats up, the aerosol-generating substrate is heated by the susceptor to generate an aerosol. The susceptor may be arranged in direct physical contact with the aerosol-generating substrate.

The susceptor may be an elongate susceptor.

As used herein, the term “elongate” is used to describe a component of the aerosolgenerating article having a length greater than the width and thickness thereof.

The elongate susceptor may be arranged substantially longitudinally within the aerosolgenerating substrate. That is, the longitudinal axis of the elongate susceptor may be approximately parallel to the longitudinal axis of the aerosol-generating substrate. For example, the longitudinal axis of the elongate susceptor may be within plus or minus 10 degrees of parallel to the longitudinal axis of the aerosol-generating substrate. The elongate susceptor may be located in a radially central position within the aerosol-generating substrate, and extend along the longitudinal axis of the aerosol-generating substrate.

The susceptor may extend from the downstream end of the aerosol-generating substrate towards the upstream end of the aerosol-generating substrate.

The susceptor may extend from the upstream end of the aerosol-generating substrate towards the downstream end of the aerosol-generating substrate.

The susceptor may extend from the upstream end of the aerosol-generating substrate to the downstream end of the aerosol-generating substrate. That is, the susceptor may extend along the entire length of the aerosol-generating substrate.

The length of the susceptor may be substantially the same as the length of the aerosolgenerating substrate.

The susceptor may extend part way along the length of the aerosol-generating substrate.

The susceptor may be spaced apart from the downstream end of the aerosolgenerating substrate.

The susceptor may be spaced apart from the upstream end of the aerosol-generating substrate. The susceptor may be spaced apart from both a downstream end and an upstream end of the aerosol-generating substrate.

The length of the susceptor may be less than the length of the aerosol-generating substrate.

The susceptor may be entirely enclosed within the aerosol-generating substrate. That is, the aerosol-generating substrate may completely surround the susceptor.

The susceptor may be in the form of a pin, rod, strip or blade.

The susceptor may have a length of at least about 5 millimetres, at least about 6 millimetres, or at least about 8 millimetres. The susceptor may have a length of less than or equal to about 15 millimetres, less than or equal to about 12 millimetres, or less than or equal to about 10 millimetres.

The susceptor may have a length of between about 5 millimetres and about 15 millimetres, between about 5 millimetres and about 12 millimetres, or between about 5 millimetres and about 10 millimetres.

The susceptor may have a length of between about 6 millimetres and about 15 millimetres, between about 6 millimetres and about 12 millimetres, or between about 6 millimetres and about 10 millimetres.

The susceptor may have a length of between about 8 millimetres and about 15 millimetres, between about 8 millimetres and about 12 millimetres, or between about 8 millimetres and about 10 millimetres.

The susceptor may have a width of at least about 1 millimetre.

The susceptor may have width of less than or equal to about 5 millimetres.

The susceptor may have a width of between about 1 millimetre and about 5 millimetres.

The susceptor may have a thickness of at least about 0.01 millimetres, or at least about 0.5 millimetres.

The susceptor may have a thickness of less than or equal to about 2 millimetres, less than or equal to about 500 micrometres, or less than or equal to about 100 micrometres.

The susceptor may have a thickness of between about 10 micrometres and about 2 millimetres, between about 10 micrometres and about 500 micrometres, or between about 10 micrometres and about 100 micrometres.

The susceptor may have a thickness of between about 0.5 millimetres and about 2 millimetres.

The susceptor may have a substantially circular cross-section.

The susceptor may have a substantially constant cross-section along the length of the susceptor.

If the susceptor has the form of a strip or blade, the strip or blade may have a rectangular shape having a width of between about 2 millimetres to about 8 millimetres, or between about 3 millimetres to about 5 millimetres. By way of example, a susceptor in the form of a strip of blade may have a width of about 4 millimetres.

If the susceptor has the form of a strip or blade, the strip or blade may have a rectangular shape and a thickness of between about 0.03 millimetres to about 0.15 millimetres, or between about 0.05 millimetres to about 0.09 millimetres. By way of example, a susceptor in the form of a strip of blade may have a thickness of about 0.07 millimetres, or about 0.06 millimetres.

The susceptor may be formed from any material that can be inductively heated to a temperature sufficient to generate an aerosol from the aerosol-generating substrate. For example, the susceptor may comprise a metal or carbon.

The susceptor may comprise or consist of a ferromagnetic material, for example a ferromagnetic alloy, ferritic iron, or a ferromagnetic steel or stainless steel. A suitable susceptor may be, or comprise, aluminium. The susceptor may be formed from 400 series stainless steels, for example grade 410, or grade 420, or grade 430 stainless steel. Different materials will dissipate different amounts of energy when positioned within electromagnetic fields having similar values of frequency and field strength.

Thus, parameters of the susceptor such as material type, length, width, and thickness may all be altered to provide a desired power dissipation within a known electromagnetic field. The susceptor may be heated to a temperature in excess of 250 degrees Celsius.

Suitable susceptors may comprise a non-metallic core with a metal layer disposed on the non-metallic core, for example metallic tracks formed on a surface of a ceramic core. A susceptor may have a protective external layer, for example a protective ceramic layer or protective glass layer encapsulating the susceptor. The susceptor may comprise a protective coating formed by a glass, a ceramic, or an inert metal, formed over a core of susceptor material.

The susceptor may be a multi-material susceptor and may comprise a first susceptor material and a second susceptor material.

The longitudinal retention element may have a cross-sectional shape to longitudinally retain the susceptor. Configuring the longitudinal retention element with a cross-sectional shape to longitudinally retain the susceptor may ensure a secure fit and proper alignment of the susceptor within the aerosol-generating article, preventing movement or displacement during use. The cross-sectional shape of the retention element may facilitate efficient heat transfer from the susceptor to the aerosol-forming substrate, optimizing the heating process and enhancing aerosol production. This configuration may contribute to the overall structural integrity and stability of the device, ensuring consistent performance over time. The cross- sectional shape of the retention element may vary over its length.

An inner diameter of the hollow retention tube may be smaller than the width of the susceptor. Ensuring that the inner diameter of the hollow retention tube is smaller than the width of the susceptor may provide a secure fit for the susceptor within the tube, preventing any movement or displacement during use. This ensures the stability of the susceptor, maintaining consistent heat transfer to the aerosol-forming substrate.

The substrate portion containing an aerosol forming substrate may comprise a capsule. Including a capsule within the substrate portion containing the aerosol-forming substrate may help preserve the freshness and potency of additives or flavorings, ensuring consistent quality over time. The capsule may contain dry powder. The capsule may hold or contain at least about 5 milligrams of a dry powder or at least about 10 milligrams of a dry powder. The capsule may hold or contain less than or equal to about 900 milligrams of a dry powder, less than or equal to about 300 milligrams of a dry powder, or less than or equal to about 150 milligrams of a dry powder. The capsule may hold or contain between about 5 milligrams and about 300 milligrams of dry powder, between about 10 milligrams and about 200 milligrams of dry powder, or between about 25 milligrams and about 100 milligrams of dry powder.

The capsule may contain active particles, such as nicotine particles. As used herein, the term “nicotine” may refer to nicotine and nicotine derivatives such as free-base nicotine, nicotine salts and the like.

The capsule may comprise one or more nicotine salts.

The active particles may have a mass median aerodynamic diameter of less than or equal to about 5 micrometres, or less than or equal to about 4 micrometres.

The active particles may have a mass median aerodynamic diameter of at least about 0.5 micrometres, or at least about 1 micrometre.

The active particles may have a mass median aerodynamic diameter of between about 0.5 micrometres and about 4 micrometres.

The capsule may contain enough nicotine particles to provide at least 2 inhalations or “puffs”, at least 5 inhalations or “puffs”, or at least 10 inhalations or “puffs”.

Each inhalation or “puff” may deliver from about 0.1 milligrams to about 3 milligrams of nicotine particles to the lungs of the user, from about 0.2 milligrams to about 2 milligrams of nicotine particles to the lungs of the user, or about 1 milligram of nicotine particles to the lungs of the user.

The capsule may hold or contain at least about 5 milligrams of nicotine particles, or at least about 10 milligrams of nicotine particles.

The capsule may hold or contain less than or equal to about 900 milligrams of nicotine particles, less than or equal to about 300 milligrams of nicotine particles, or less than or equal to about 150 milligrams of nicotine particles.

The capsule may contain flavor particles.

The capsule may be configured to be rotatable and may be arranged in contact with the central support point. Configuring the capsule to be rotatable and arranging it in contact with the central support point may improve aerosol transfer efficiency. This may ensure uniform distribution of aerosol, leading to enhanced flavor release and aerosol production. Additionally, placing the capsule in contact with the central support point may provide stability and support, preventing movement or displacement during use. This may ensure consistent performance.

The aerosol-generating article may further comprise a main filter, wherein the main filter may be arranged downstream from the retention section. Positioning the main filter downstream from the retention section in the aerosol-generating article may enhance filtration efficiency by allowing the filter to effectively remove particulates and impurities from the aerosol, resulting in a cleaner and purer vaping experience. This may contribute to consistent filtration performance and maintains the integrity of the aerosol. Additionally, the upstream placement of the main filter optimizes airflow within the device, may promote smooth and unrestricted airflow through the filter for efficient filtration.

The longitudinal retention element may have an X-shaped cross section. The term "X- shaped cross-section" refers to a structural or geometric configuration of an object, particularly a cross-section, that resembles the letter "X" when viewed from a certain angle or direction. This configuration typically involves four arms or branches extending outward in perpendicular or diagonal directions from a central point, forming a cross shape with equal or varying lengths. Configuring the longitudinal retention element with an X-shaped cross-section may enhance stability within the aerosol-generating article by providing multiple points of contact with the inner walls of the hollow retention tube, minimizing movement or rotation. This may ensure the structural integrity of the device during use. The X-shaped design may distribute forces evenly along multiple axes, optimizing support for various components of the device. This may help prevent deformation or damage, enhancing overall durability. The X-shaped configuration may improve heat dissipation within the device, contributing to more efficient cooling and better performance. This can be particularly beneficial in aerosol-generating articles where heat management is critical. Furthermore, the configuration may streamline the manufacturing process by facilitating easier insertion and assembly of the retention element into the hollow tube. This may lead to cost savings and increased production efficiency. Overall, the X-shaped cross-section of the longitudinal retention element offers benefits in stability, support, heat dissipation, and manufacturing efficiency, improving the overall quality and user experience of the aerosol-generating article. The longitudinal retention element may comprise two components each may comprise an insert slot, wherein the insert slots may be configured to slidingly connect the two components to form the longitudinal retention element.

An "insert slot" refers to a narrow and elongated opening or groove in a structure, specifically configured to accommodate an insert. This slot is configured to allow the insertion of a corresponding object into the material or structure. Insert slots are commonly used in various applications, including furniture assembly, machinery, and construction, to securely attach or connect different parts together. Incorporating two components into the longitudinal retention element, each featuring an insert slot, may simplify the assembly process as the two components may be easily connected via the insert slots, reducing manufacturing time and costs. The configuration may enhance the overall structural integrity of the retention element and the aerosol-generating article.

The aerosol-generating article may comprise a filter plug wrap paper, extending from the downstream end of the aerosol-generating article to the upstream end over at least a portion of the aerosol article, and may cover a circumferential surface of the aerosol-generating article, preferably the first hollow retention tube, more preferably the retention section. Incorporating a filter plug wrap paper into the aerosol-generating article may provide protection to the aerosol-generating article, acting as a barrier against external factors such as dust and moisture, which helps maintain the aerosol-generating article's integrity and cleanliness. The wrap paper may enhance the device's aesthetic appeal by providing a smooth and uniform surface, contributing to a more polished look. Additionally, it may improve grip and handling comfort for users, potentially reducing the risk of accidental slips or drops. Moreover, covering the circumferential surface, especially over the retention section, may provide insulation, helping to regulate the aerosol-generating article's temperature during use. The wrap paper may offer a space for branding, labeling, or customization, allowing manufacturers to print logos or designs for brand recognition and personalization. Overall, incorporating a filter plug wrap paper enhances the device's protection, aesthetics, grip, insulation, and branding possibilities, thereby improving the overall user experience.

The aerosol-generating article may comprise a substrate portion wrap paper, covering a circumferential surface of the substrate portion. Providing a substrate portion wrap paper covering the circumferential surface of the substrate portion may provide protection to the substrate portion, shielding it from external elements such as dust, moisture, and physical damage. This may help maintain the integrity and functionality of the substrate, ensuring consistent performance over time.

An aerosol-generating system may comprise an aerosol-generating article. The aerosol-generating system may comprise a holder. The holder may comprise a cavity for receiving the aerosol-generating article. The cavity may be configured to securely house the aerosol-generating article, ensuring its safe storage when not in use. The holder may facilitate easy access to the aerosol-generating article, allowing users to conveniently insert and remove the device as needed. The holder may offer protection to the aerosol-generating article, shielding it from external elements such as dust and moisture, thus preserving its integrity and functionality. Additionally, the compact design of the holder may enhance the portability of the entire system, enabling users to carry it with them while on the move.

The present invention provides a replacement of first and second tubular elements with a recyclable or biodegradable solution.

As used herein, the term “aerosol- or smoke-generating article” comprises conventional smoke-generating articles like conventional cigarettes or cigars. As used herein, the term “aerosol- or smoke-generating article” comprises aerosol-generating articles which comprise an aerosol-forming substrate. An aerosol-generating article may be provided to heat the aerosol-forming substrate to a temperature at which one or more components of the aerosolforming substrate are volatilised without burning the aerosol-forming substrate. The aerosolgenerating article may comprise a heating element, for example a susceptor element. The aerosol-forming substrate may be present in solid form or in liquid form. As used herein, the term “aerosol- or smoke-generating article” comprises inhaler articles, for example dry powder inhalers.

As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing volatile compounds that can form an aerosol or a vapor. Such volatile compounds may be released by heating the aerosol-forming substrate. The aerosol-forming substrate may be in solid form or may be in liquid form. The terms ‘aerosol’ and ‘vapor’ are used synonymously.

The aerosol-forming substrate may be part of the aerosol-generating article. The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosol-forming substrate may be part of a liquid held in a liquid storage portion of the aerosol-generating article. The liquid storage portion may contain a liquid aerosol-forming substrate. Alternatively or in addition, the liquid storage portion may contain a solid aerosol-forming substrate. For example, the liquid storage portion may contain a suspension of a solid aerosol-forming substrate and a liquid. Preferably, the liquid storage portion contains a liquid aerosol-forming substrate.

The aerosol-forming substrate may comprise nicotine. The nicotine-containing aerosolforming substrate may be a nicotine salt matrix.

The aerosol-forming substrate may comprise plant-based material. The aerosolforming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material including volatile tobacco flavour compounds which are released from the aerosol-forming substrate upon heating. Alternatively, the aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise homogenised plant-based material. The aerosol-forming substrate may comprise homogenised tobacco material. Homogenised tobacco material may be formed by agglomerating particulate tobacco.

The aerosol-forming substrate may comprise at least one aerosol-former. An aerosolformer is any suitable known compound or mixture of compounds that, in use, facilitates formation of a dense and stable aerosol and that is substantially resistant to thermal degradation at the temperature of operation of the device. Suitable aerosol-formers are well known in the art and include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1 ,3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1 , 3-butanediol. Preferably, the aerosol former is glycerine. Where present, the homogenised tobacco material may have an aerosolformer content of equal to or greater than 5 percent by weight on a dry weight basis, and preferably from 5 percent to 30 percent by weight on a dry weight basis. The aerosol-forming substrate may comprise other additives and ingredients, such as flavourants.

As used herein, the term ‘aerosol-generating article’ refers to a device that interacts with an aerosol-generating article to generate an aerosol.

As used herein, when used in conjunction with the aerosol- or smoke-generating article or a part or portion thereof, the term ‘downstream’ refers to a user-end, or mouth-end, and the term ‘upstream’ refers to the end opposite to the downstream end.

The aerosol-generating article may comprise a mouth end through which in use an aerosol exits the aerosol-generating article and is delivered to a user. The mouth end may also be referred to as the downstream end. In use, a user draws on the downstream or mouth end of the aerosol-generating article in order to inhale an aerosol generated by the aerosolgenerating article. Alternatively, a user may directly draw on an aerosol-generating article inserted into an opening at the downstream end of the aerosol-generating article. The opening at the downstream end may be an opening of the cavity. The cavity may be configured to receive the aerosol-generating article. The aerosol-generating article comprises a upstream end opposed to the downstream or mouth end. The downstream or mouth end of the aerosolgenerating article may also be referred to as the downstream end and the upstream end of the aerosol-generating article may also be referred to as the upstream end. Components, or portions of components, of the aerosol-generating article may be described as being upstream or downstream of one another based on their relative positions between the downstream, downstream or mouth end and the upstream or upstream end of the aerosol-generating article.

As used herein, an ‘aerosol-generating article’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article. An aerosol-generating article may be a smoking device that interacts with an aerosol-forming substrate of an aerosolgenerating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth. An aerosol-generating article may be a holder. The device may be an electrically heated smoking device. The aerosol-generating article may comprise a housing, electric circuitry, a power supply, a heating chamber and a heating element.

As used herein with reference to the present invention, the term ‘smoking’ with reference to a device, article, system, substrate, or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is fully or at least partially combusted. The aerosol-generating article of the present invention is arranged to heat the aerosol-forming substrate to a temperature below a combustion temperature of the aerosol-forming substrate, but at or above a temperature at which one or more volatile compounds of the aerosol-forming substrate are released to form an inhalable aerosol.

The aerosol-generating article may comprise electric circuitry. The electric circuitry may comprise a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of the controller. The electric circuitry may comprise further electronic components. The electric circuitry may be configured to regulate a supply of power to the heating element. Power may be supplied to the heating element continuously following activation of the aerosol-generating article or may be supplied intermittently, such as on a puff- by-puff basis. The power may be supplied to the heating element in the form of pulses of electrical current. The electric circuitry may be configured to monitor the electrical resistance of the heating element, and preferably to control the supply of power to the heating element dependent on the electrical resistance of the heating element.

The aerosol-generating article may comprise a power supply, typically a battery, within a main body of the aerosol-generating article. In one embodiment, the power supply is a Lithium-ion battery. Alternatively, the power supply may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium- Iron-Phosphate, Lithium Titanate or a Lithium-Polymer battery. As an alternative, the power supply may be another form of charge storage device such as a capacitor. The power supply may require recharging and may have a capacity that enables to store enough energy for one or more usage experiences; for example, the power supply may have sufficient capacity to continuously generate aerosol for a period of around six minutes or for a period of a multiple of six minutes. In another example, the power supply may have sufficient capacity to provide a predetermined number of puffs or discrete activations of the heating element.

The cavity of the aerosol-generating article may have an open end into which the aerosol-generating article is inserted. The open end may be a downstream end. The cavity may have a closed end opposite the open end. The closed end may be the base of the cavity. The closed end may be closed except for the provision of air apertures arranged in the base. The base of the cavity may be flat. The base of the cavity may be circular. The base of the cavity may be arranged upstream of the cavity. The open end may be arranged downstream of the cavity. The cavity may have an elongate extension. The cavity may have a longitudinal central axis. A longitudinal direction may be the direction extending between the open and closed ends along the longitudinal central axis. The longitudinal central axis of the cavity may be parallel to the longitudinal axis of the aerosol-generating article.

The cavity may be configured as a heating chamber. The cavity may have a cylindrical shape. The cavity may have a hollow cylindrical shape. The cavity may have a shape corresponding to the shape of the aerosol-generating article to be received in the cavity. The cavity may have a circular cross-section. The cavity may have an elliptical or rectangular crosssection. The cavity may have an inner diameter corresponding to the outer diameter of the aerosol-generating article.

The airflow channel may run through the aerosol-generating article and into the cavity. Ambient air may be drawn into the aerosol-generating article, into the cavity and towards the user through the airflow channel. Downstream of the cavity, a mouthpiece may be arranged or a user may directly draw on the aerosol-generating article. The airflow channel may extend through the mouthpiece.

In any of the aspects of the disclosure, the heating element may comprise an electrically resistive material. Suitable electrically resistive materials include but are not limited to: semiconductors such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material. Such composite materials may comprise doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum platinum, gold and silver. Examples of suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese-, gold- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetai® and iron-manganese-aluminium based alloys. In composite materials, the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required.

As described, in any of the aspects of the disclosure, the heating element may be part of an aerosol-generating article. The aerosol-generating article may comprise an internal heating element or an external heating element, or both internal and external heating elements, where "internal" and "external" refer to the aerosol-forming substrate. An internal heating element may take any suitable form. For example, an internal heating element may take the form of a heating blade. Alternatively, the internal heater may take the form of a casing or substrate having different electro-conductive portions, or an electrically resistive metallic tube. Alternatively, the internal heating element may be one or more heating needles or rods that run through the center of the aerosol-forming substrate. Other alternatives include a heating wire or filament, for example a Ni-Cr (Nickel-Chromium), platinum, tungsten or alloy wire or a heating plate. Optionally, the internal heating element may be deposited in or on a rigid carrier material. In one such embodiment, the electrically resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as a track on a suitable insulating material, such as ceramic material, and then sandwiched in another insulating material, such as a glass. Heaters formed in this manner may be used to both heat and monitor the temperature of the heating elements during operation.

An external heating element may take any suitable form. For example, an external heating element may take the form of one or more flexible heating foils on a dielectric substrate, such as polyimide. The flexible heating foils can be shaped to conform to the perimeter of the substrate receiving cavity. Alternatively, an external heating element may take the form of a metallic grid or grids, a flexible printed circuit board, a molded interconnect device (MID), ceramic heater, flexible carbon fibre heater or may be formed using a coating technique, such as plasma vapour deposition, on a suitable shaped substrate. An external heating element may also be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as a track between two layers of suitable insulating materials. An external heating element formed in this manner may be used to both heat and monitor the temperature of the external heating element during operation.

As an alternative to an electrically resistive heating element, the heating element may be configured as an induction heating element. The induction heating element may comprise an induction coil and a susceptor. In general, a susceptor is a material that is capable of generating heat, when penetrated by an alternating magnetic field. When located in an alternating magnetic field. If the susceptor is conductive, then typically eddy currents are induced by the alternating magnetic field. If the susceptor is magnetic, then typically another effect that contributes to the heating is commonly referred to hysteresis losses. Hysteresis losses occur mainly due to the movement of the magnetic domain blocks within the susceptor, because the magnetic orientation of these will align with the magnetic induction field, which alternates. Another effect contributing to the hysteresis loss is when the magnetic domains will grow or shrink within the susceptor. Commonly all these changes in the susceptor that happen on a nano-scale or below are referred to as “hysteresis losses”, because they produce heat in the susceptor. Hence, if the susceptor is both magnetic and electrically conductive, both hysteresis losses and the generation of eddy currents will contribute to the heating of the susceptor. If the susceptor is magnetic, but not conductive, then hysteresis losses will be the only means by which the susceptor will heat, when penetrated by an alternating magnetic field. According to the invention, the susceptor may be electrically conductive or magnetic or both electrically conductive and magnetic. An alternating magnetic field generated by one or several induction coils heat the susceptor, which then transfers the heat to the aerosol-forming substrate, such that an aerosol is formed. The heat transfer may be mainly by conduction of heat. Such a transfer of heat is best, if the susceptor is in close thermal contact with the aerosol-forming substrate.

As used herein, the term ‘aerosol-generating article’ refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth. An aerosolgenerating article may be disposable.

As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate. An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.

The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosolforming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds which are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise an aerosol former that facilitates the formation of a dense and stable aerosol. Examples of suitable aerosol formers are glycerine and propylene glycol.

The aerosol-generating substrate preferably comprises homogenised tobacco material, an aerosol-former and water. Providing homogenised tobacco material may improve aerosol generation, the nicotine content and the flavour profile of the aerosol generated during heating of the aerosol-generating article. Specifically, the process of making homogenised tobacco involves grinding tobacco leaf, which more effectively enables the release of nicotine and flavours upon heating.

As used herein, the term "aerosol-generating system" refers to the combination of an aerosol-generating article with an aerosol-forming substrate. When the aerosol-forming substrate forms part of an aerosol-generating article, the aerosol-generating system refers to the combination of the aerosol-generating article with the aerosol-generating article. In the aerosol-generating system, the aerosol-forming substrate and the aerosol-generating article cooperate to generate an aerosol.

Below, there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

Example E1 : An aerosol-generating article, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a retention section, the retention section comprising: a hollow retention tube; and a longitudinal retention element, wherein the longitudinal retention element is arranged within the hollow retention tube, a substrate portion containing an aerosol forming substrate, wherein the retention section is arranged downstream from and in contact with the substrate portion, wherein the longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

Example E2: The aerosol-generating article according to claim according to Example E1 , wherein the hollow retention tube comprises cardboard, preferably consists of cardboard.

Example E3: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element comprises cardboard, preferably consists of cardboard.

Example E4: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element comprises at least one perforation. Example E5: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element comprises at least one cutout.

Example E6: The aerosol-generating article according to any one of the preceding examples, wherein the hollow retention tube comprises at least one perforation allowing ambient air to be laterally drawn into the retention section.

Example E7: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element is attached to the hollow retention tube.

Example E8: The aerosol-generating article according to Example E7, wherein the longitudinal retention element comprises attachment portions, configured to attach the longitudinal retention element to an inner wall of the hollow retention tube, preferably via glueing.

Example E9: The aerosol-generating article according to any one of the preceding examples, further comprising a front plug, wherein the front plug is arranged upstream from the substrate portion.

Example E10: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element comprises a central support point arranged on a longitudinal central axis of the aerosol-generating article, preferably on an abutting plane of the retention section and the substrate portion.

Example E11 : The aerosol-generating article according to any one of the preceding examples, wherein the substrate portion comprises a central susceptor strip.

Example E12: The aerosol-generating article according to Example E11 , wherein the longitudinal retention element has a cross-sectional shape to longitudinally retain the susceptor.

Example E13: The aerosol-generating article according to any one of the examples E11 or E12, wherein an inner diameter of the hollow retention tube is smaller than the width of the susceptor.

Example E14: The aerosol-generating article according to Example E10, wherein the substrate portion containing an aerosol forming substrate comprises a capsule. Example E15: The aerosol-generating article according to Example E14, wherein the capsule is configured to be rotatable and is arranged in contact with the central support point.

Example E16: The aerosol-generating article according to any one of the examples E1 to E13, further comprising a main filter, wherein the main filter is arranged downstream from the retention section.

Example E17: The aerosol-generating article according to one of the preceding examples, wherein the longitudinal retention element has an X-shaped cross section.

Example E18: The aerosol-generating article according to any one of the preceding examples, wherein the longitudinal retention element comprises two components each comprising an insert slot, wherein the insert slots are configured to slidingly connect the two components to form the longitudinal retention element.

Example E19: The aerosol-generating article according to any one of the preceding examples, wherein the aerosol-generating article comprises a filter plug wrap paper, extending from the upstream end of the aerosol-generating article to the downstream end over at least a portion of the aerosol article, and covering a circumferential surface of the aerosol-generating article, preferably the first hollow retention tube, more preferably the retention section.

Example E20: The aerosol-generating article according to any one of the preceding examples, wherein the aerosol-generating article comprises a substrate portion wrap paper, covering a circumferential surface of the substrate portion.

Example E21 : An aerosol-generating system, comprising: the aerosol-generating article according to any one of the preceding claims, and a holder comprising a cavity for receiving the aerosol-generating article.

Features described in relation to one embodiment may equally be applied to other embodiments of the invention.

The invention will be further described, by way of example only, with reference to the accompanying drawings in which:

Figure 1A and 1 B are a schematic longitudinal and corresponding radial cross-sectional view of an aerosol-generating article.

Figure 2 is a schematic view of the manufacturing process of longitudinal retention element.

Figure 3 is a schematic view of the longitudinal retention element. Figure 4 is a schematic view of a Nicotine Containing Product (NCP) in form of a nicotine powder capsule stick.

Figure 1A illustrates an aerosol-generating article 10, showing its configuration and components. This aerosol-generating article 10 comprises an upstream end and a downstream end, with the upstream end or mouth end configured to seamlessly connect to a holder configured for the aerosol-generating article 10. A feature of the aerosol-generating article 10 is its retention section 12, configured to optimize performance and user experience. Within this retention section 12 a hollow retention tube 14 is provided, containing a longitudinal retention element 16. The longitudinal retention element 16 is placed within the hollow retention tube 14, ensuring precise and secure retention of the substrate portion 18 containing the aerosolforming substrate. Of particular significance is the material composition of both the hollow retention tube 14 and the longitudinal retention element 16. Constructed primarily of cardboard, these components offer durability and reliability while maintaining lightweight characteristics. This choice of material not only enhances the structural integrity of the aerosol-generating article 10 but also aligns with sustainability objectives, as cardboard is known for its recyclability and eco-friendliness. Furthermore, the longitudinal retention element 16 incorporates perforations 20, adding an additional functionality to the configuration. These perforations 20 facilitate airflow within the aerosol-generating article 10, contributing to the efficient generation and distribution of aerosol. Additionally, the article comprises a main filter 22, positioned upstream from the retention section 12, ensuring the filtration of impurities before aerosol formation. Furthermore, the aerosol-generating article 10 includes a front plug 26, arranged downstream from the substrate portion 18.

Configuring the longitudinal retention element 16 with a cross-sectional shape to longitudinally retain the susceptor 24 ensures a secure fit and proper alignment of the susceptor 24 within the aerosol-generating article 10, preventing movement or displacement during use.

The longitudinal retention element 16 placed within the hollow retention tube 14 is configured as a direct replacement for acetate-based sections as known in the state of the art. The hollow retention tube 14 creates the rigidity, structure, and form factor of acetate-based sections, as well as allowing the aerosol to pass through its center. The longitudinal retention element 16 is configured to be held rigidly between the substrate portion 18 and the main filter 22 thereby remaining securely in position whilst also holding the substrate and the susceptor 24 securely in place.

The longitudinal retention element 16 is configured to have an outer diameter smaller than the internal diameter of the internal diameter of the hollow retention tube 14 such that it creates minimal impact to airflow, turbulence, and homogenization, whilst at the same time the diameter of the longitudinal retention element 16 is large enough that at least one portion of its structure crosses the path occupied by the susceptor 24, thereby ensuring that the susceptor 24 remains in position.

In additional, replacing acetate-based sections into a single-length replacement may help simplify the combining step of manufacturing, as well as improving product rigidity since the break between acetate-based sections, an area of potential bending weakness, is eliminated.

As previously described, the longitudinal retention element 16 within a hollow retention tube 14 is configured as a direct replacement for first and second tubular elements.

As can be seen in Figure 1 B, the hollow retention tube 14 is configured to be identical in length to the total length of first and second tubular elements (L5), and its outer diameter is designed to be identical to first and second tubular elements (D2). In designing this way, the combining stage of manufacturing is the same as the current process, improved by the fact only a single length of component is being combined, and the function and form factor of the product is maintained.

The material thickness (D2 minus D3) of the hollow retention tube 14 must be such that it allows the largest internal diameter for maximum airflow (D3), maintaining aerosolization and pressure drop characteristics of the current aerosol-generating article 10, whilst ensuring sufficient rigidity such that can be handled during the combining stage of manufacturing and be sufficiently strong for packing and consumer usage.

Now describing the longitudinal retention element 16 which is configured to have an outer diameter, defined by one of the flat sections of longitudinal retention element 16 (D8), being significantly smaller than the internal diameter of the cardboard tube (D3) such that it creates minimal impact to airflow, turbulence, and homogenization, whilst at the same time the diameter of the longitudinal retention element 16 is large enough that at least one portion of its structure crosses the path occupied by the susceptor 24 in any positioning of the longitudinal retention element 16 within the hollow retention tube 14, thereby ensuring that the susceptor 24 remains in position. To do this, its outer diameter (D8) plus one wall thickness of cardboard tube ((D2-D3/2)) must be greater than half the diameter of the sensorial media rod (D5/2).

An example calculation to calculate the minimum viable diameter of longitudinal retention element 16 is as follows:

Assuming the following values, which are deemed reasonable and close to reality:

D5 = 6.9mm

D2 = 7.0mm

D3 = 6.4mm

Calculation: D8 + (D2-D3/2) = (D5/2)

D8 = (D5/2) - (D2-D3/2) = (6.9/2) - (7.0-6.4/2) = 3.15mm

Therefore, the minimum outer diameter for the longitudinal retention element 16 is >3.15mm, and with safety factor is place should preferably be between 4 to 5mm.

Figure 2 shows an exemplary embodiment of a longitudinal retention element 16 consisting of two flat pieces, known as single flat faces, which interlock together via slots to form the cross-sectional shape. The length of the longitudinal retention element 16 is such that it should be equal to, or slightly longer than the hollow retention tube 14, thereby exerting slight pressure onto the substrate portion 18 and ensuring secure holding in position with both ends of the longitudinal retention element 16 held against the faces of substrate portion 18 and main filter filter 22.

The configuration of the slot is also critical, and its length must be half of the longitudinal retention element 16, and its width should be equivalent to, or slightly larger, the thickness of the longitudinal retention element 16 which ensures that the longitudinal retention element 16 does not want to readily collapse and lose structure. Optionally, an appropriate glue can be used at one or more of the right-angled zones created by the X shape to ensure it holds its structure more securely. It is also worth noting that the longitudinal retention element 16 may be manufactured in a number of alternative ways. These include using two L-shapes joined at a central point by adhesion, or by paper pulp extrusion which could create a single-piece continuous formation.

Figure 3 describes additional features like cutouts 28 or perforations 30 to further aid air circulation and homogenization. Cutouts 28 may promote the mixing of ambient air with the aerosol, ensuring a consistent aerosol composition for a better vaping experience. They may assist in regulating the temperature of the aerosol, preventing overheating and discomfort. Including at least one perforation 30 in the hollow retention tube 14 of the aerosol-generating article 10 may enable ambient air to be drawn laterally into the retention section. This configuration enhances airflow within the device, facilitating efficient cooling of the aerosol and ensuring a smoother vaping experience. The intake of ambient air may help regulate the temperature of the aerosol, preventing overheating and maintaining a consistent vaping temperature. It may improve aerosol quality by promoting the mixing of ambient air with the aerosol stream, resulting in a more uniform aerosol composition.

Figure 4 shows a Nicotine Containing Product (NCP) in form of a nicotine powder capsule stick with a capsule 32. The challenge is different than that of the heated aerosolgenerating device design in so far as the powder in the NCP stick is not heated, and the purpose of the longitudinal retention element 16 is to hold the capsule 32 in position and allow it to rotate abouts its axis during inhalation, thereby releasing powder more effectively. The central support point 34 is arranged on a longitudinal central axis 16 of the aerosol-generating article 10 on an abutting plane of the retention section and the substrate portion 18. The central support point 34 helps distributing forces evenly along the longitudinal axis, enhancing overall durability and reliability. Additionally, positioning it on the abutting plane of the retention section and the substrate portion 18 ensures optimal alignment between critical elements. The longitudinal retention element 16 comprise attachment portions 36, configured to attach the longitudinal retention element 16 to an inner wall of the hollow retention tube 14, preferably via glueing. Including attachment portions 36 in the longitudinal retention element 16 ensures a secure and permanent connection, enhancing the stability and structural integrity of the aerosol-generating article 10. It simplifies the assembly process, reducing manufacturing time and costs. Additionally, gluing the attachment portions 36 promotes efficient airflow within the aerosol-generating article 10, contributing to optimal cooling and aerosol generation.

For the purpose of the present description and of the appended claims, except where otherwise indicated, all numbers expressing amounts, quantities, percentages, and so forth, are to be understood as being modified in all instances by the term "about". Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein. In this context, therefore, a number A is understood as A ± 5 percent (5%) of A. Within this context, a number A may be considered to include numerical values that are within general standard error for the measurement of the property that the number A modifies. The number A, in some instances as used in the appended claims, may deviate by the percentages enumerated above provided that the amount by which A deviates does not materially affect the basic and novel characteristic(s) of the claimed invention. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein.

Claims

1. An aerosol-generating article, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a retention section, the retention section comprising: a hollow retention tube; and a longitudinal retention element, wherein the longitudinal retention element is arranged within the hollow retention tube, a substrate portion containing an aerosol forming substrate, wherein the substrate portion comprises a central susceptor strip, wherein an inner diameter of the hollow retention tube is smaller than the width of the central susceptor strip or wherein the longitudinal retention element has an X-shaped cross section, wherein the retention section is arranged downstream from and in contact with the substrate portion, wherein the longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

2. The aerosol-generating article according to claim according to claim 1 , wherein the hollow retention tube comprises cardboard, preferably consists of cardboard.

3. The aerosol-generating article according to any one of the preceding claims, wherein the longitudinal retention element comprises cardboard, preferably consists of cardboard.

4. The aerosol-generating article according to any one of the preceding claims, wherein the longitudinal retention element comprises at least one perforation.

5. The aerosol-generating article according to any one of the preceding claims, wherein the longitudinal retention element comprises at least one cutout.

6. The aerosol-generating article according to any one of the preceding claims, wherein the hollow retention tube comprises at least one perforation allowing ambient air to be laterally drawn into the retention section.

7. The aerosol-generating article according to any one of the preceding claims, wherein the longitudinal retention element is attached to the hollow retention tube.

8. The aerosol-generating article according to claim 7, wherein the longitudinal retention element comprises attachment portions, configured to attach the longitudinal retention element to an inner wall of the hollow retention tube, preferably via glueing.

9. The aerosol-generating article according to any one of the preceding claims, wherein the longitudinal retention element comprises a central support point arranged on a longitudinal central axis of the aerosol-generating article, preferably on an abutting plane of the retention section and the substrate portion.

10. The aerosol-generating article according to claim 1 , wherein the longitudinal retention element has a cross-sectional shape to longitudinally retain the susceptor.

11. An aerosol-generating article, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a retention section, the retention section comprising: a hollow retention tube; and a longitudinal retention element, wherein the longitudinal retention element is arranged within the hollow retention tube, wherein the longitudinal retention element comprises a central support point arranged on a longitudinal central axis of the aerosol-generating article, a substrate portion containing an aerosol forming substrate, wherein the substrate portion containing an aerosol forming substrate comprises a capsule, wherein the capsule is configured to be rotatable and is arranged in contact with the central support point, wherein the retention section is arranged downstream from and in contact with the substrate portion, wherein the longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

12. The aerosol-generating article according to claim 11 , wherein the central support point is arranged on an abutting plane of the retention section and the substrate portion.

13. An aerosol-generating article, the aerosol-generating article comprising: a downstream end, an upstream end, wherein the upstream end is configured to be connectable to a holder for the aerosol-generating article, a retention section, the retention section comprising: a hollow retention tube; and a longitudinal retention element, wherein the longitudinal retention element is arranged within the hollow retention tube, wherein the longitudinal retention element comprises at least one perforation, a substrate portion containing an aerosol forming substrate, wherein the retention section is arranged downstream from and in contact with the substrate portion, wherein the longitudinal retention element is configured to longitudinally retain the substrate portion within the aerosol-generating article.

14. An aerosol-generating system, comprising: the aerosol-generating article according to any one of the preceding claims, and a holder comprising a cavity for receiving the aerosol-generating article.