Aerosol-generating substrate and aerosol-generating article

Abstract

The invention provides an aerosol generating substrate and an aerosol generating product, the aerosol generating substrate is formed based on an aerosol generating material, a heat conduction structure is arranged in the aerosol generating substrate, and the heat conduction structure extends from the center of the aerosol generating substrate to the periphery of the aerosol generating substrate. And the heat conductivity of the heat conducting structure is different from that of the aerosol generating material. According to the scheme, the uniformity of the aerosol release amount can be improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of aerosol generation technology, and in particular to an aerosol generating substrate and an aerosol generating product. Background Art

[0002] Aerosol-generating products such as modern electronic cigarettes or Heat Not Burn (HNB) products are gradually becoming alternatives to traditional tobacco products, aiming to provide users with a safer and cleaner smoking experience.

[0003] Traditional tobacco products rely on ignition to generate aerosols, a process that often involves the production of numerous harmful substances. For example, burning tobacco releases a variety of harmful substances, including tar, carbon monoxide, and heavy metals, which pose a serious threat to human health. Therefore, ignited aerosol generation technology has significant safety deficiencies.

[0004] HNB tobacco products, also known as low-temperature cigarettes, are a new type of tobacco product that combines a heating device and a tobacco cartridge. Designed with the concept of "heating without burning," these "low-temperature cigarettes" utilize a specialized heating device (e.g., a smoking device) to heat processed tobacco (e.g., a specialized tobacco cartridge) to a specific temperature, heating the tobacco to a point where it can be inhaled. Their advantages include being more harmless while still maintaining the authentic taste and throat hit of cigarettes, offering smokers a smoking alternative that's closest to traditional cigarettes.

[0005] HNB-related aerosol-generating products convert aerosol-generating materials containing nicotine, flavors and other ingredients (mainly aerosol generators) into aerosols for users to inhale through different heating mechanisms.

[0006] Some HNBs use solid-state shaped wick materials, which are manufactured from aerosol-generating materials. Despite being used at relatively high temperatures, these solid-state shaped wick materials still suffer from uneven aerosol (smoke) release. For example, at high heating temperatures (such as 370°C), the first puff releases aerosol quickly and with sufficient concentration, but the second and even third puffs have significantly lower concentrations. Summary of the Invention

[0007] The technical problem solved by the embodiments of the present invention is the uneven aerosol release amount.

[0008] To solve the above technical problems, an embodiment of the present invention provides an aerosol-generating substrate, which is formed based on an aerosol-generating material. A heat-conducting structure is arranged inside the aerosol-generating substrate. The heat-conducting structure extends from the center to the periphery of the aerosol-generating substrate, and the thermal conductivity of the heat-conducting structure is different from the thermal conductivity of the aerosol-generating material.

[0009] This design allows different thermal conductivities in different regions of the aerosol-generating substrate. This allows the thermal conductivity from the center to the periphery of the aerosol-generating substrate to be adjusted based on the location of the heating element within the substrate. This allows the efficiency of heat transfer in the radial direction of the substrate to be adjusted, thereby regulating the amount of aerosol released and improving the uniformity of aerosol release.

[0010] Optionally, the aerosol generating substrate includes a plurality of annular parts and radial parts surrounding the center of the aerosol generating substrate, wherein the radial part passes through the plurality of annular parts, and airway holes are provided between adjacent annular parts along the radial direction of the aerosol generating substrate, wherein a heat conductive structure is arranged between adjacent annular parts.

[0011] Optionally, the heat-conducting structure is provided at at least one of the following positions: the radial portion; penetrating the airway hole along the radial direction of the aerosol generating substrate; and attached to the inner wall of the airway hole along the radial direction of the aerosol generating substrate.

[0012] Optionally, the heat-conducting material used in the heat-conducting structure includes at least one of the following: granular heat-conducting material; sheet heat-conducting material.

[0013] Optionally, the radial portion of the aerosol-generating substrate is made of a different material than the annular portion, and the material of the radial portion is doped with a granular thermally conductive material. The use of a granular thermally conductive material can make the thermal conductivity of the radial portion relatively more uniform, improving the efficiency of heat transfer from the radial portion to the adjacent annular portion. This can ensure that the annular portion away from the heating element can also quickly obtain sufficient heat and effectively release it, thereby preventing a decrease in the amount of aerosol released during the second and third puffs. This further ensures that the annular portion away from the heating element can also effectively heat and release aerosol, thereby increasing or extending the number of puffs of an aerosol-generating article using this aerosol-generating substrate.

[0014] Optionally, the thermally conductive material includes at least one of the following: metal, graphite, graphene, silicon carbide, boron nitride, aluminum nitride, and aluminum oxide.

[0015] Optionally, the thermal conductivity of the heat-conducting structure is greater than the thermal conductivity of the aerosol-generating material.

[0016] Optionally, a hollow structure is provided in the center of the aerosol-generating substrate, the hollow structure being configured to receive the heating element, wherein the heat-conducting structure is not in contact with the heating element. In other words, the portion of the aerosol-generating substrate near the heating element does not contain heat-conducting material. This effectively concentrates heat for rapid aerosol generation, preventing heat from being rapidly transferred to the periphery via the heat-conducting structure, thereby affecting heat concentration in the central area and, in particular, the first puff experience.

[0017] Optionally, the thermal conductivity of the heat-conducting structure is constant or decreases along the radial direction of the aerosol-generating substrate, from the center to the periphery of the aerosol-generating substrate. Since, from the center to the periphery of the aerosol-generating substrate, the radial dimensions are the same, more aerosol-generating material is present closer to the periphery. Combined with the decreasing thermal conductivity from the center to the periphery of the aerosol-generating substrate, this allows for rapid heat conduction near the center, resulting in a relatively large amount of aerosol-generating material being heated. This ensures a consistent amount of heated aerosol-generating material per unit time, thereby helping to improve the uniformity of aerosol concentration.

[0018] Optionally, the thermal conductivity of the heat-conducting structure is lower than that of the aerosol-generating material. This can control the heat transfer rate under specific heating conditions, such as peripheral heating, thereby preventing rapid heat transfer from the periphery to the center, reducing the aerosol release rate in the center, and minimizing the difference between the early and late stages of aerosol release, thereby improving the uniformity of aerosol release.

[0019] The present application also provides an aerosol-generating product, comprising: any one of the above-mentioned aerosol-generating substrates.

[0020] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0021] A heat-conducting structure is disposed within the aerosol matrix, extending from the center to the periphery of the aerosol-generating matrix. Because the thermal conductivity of the heat-conducting structure differs from that of the aerosol-generating material forming the aerosol matrix, portions of the aerosol-generating matrix extending from the center to the periphery exhibit different thermal conductivities. This allows the thermal conductivity from the center to the periphery of the aerosol-generating matrix to be adjusted based on the position of the heating element within the aerosol-generating matrix, thereby adjusting the heat transfer efficiency in the radial direction of the aerosol-generating matrix, thereby regulating the amount of aerosol released and improving the uniformity of aerosol release. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of an aerosol generating substrate in an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A top view of

[0024] Figure 3 is a schematic structural diagram of another aerosol generating substrate in an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A top view of

[0026] Figure 5 is a schematic structural diagram of another aerosol generating substrate in an embodiment of the present invention;

[0027] Figure 6 yes Figure 5 A top view of

[0028] Figure 7 Schematic diagram of the structure of an aerosol generating product in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] As described in the background, existing solid-state shaped cigarette core materials, despite being used at relatively high temperatures, still suffer from uneven aerosol (smoke) release. An existing aerosol-generating matrix comprises an annular portion and a radial portion, employing central heating. Research has revealed that the reason for this uneven aerosol (smoke) release is that, under high-temperature heating conditions, the center ring near the heating element, due to its proximity to the heating element, concentrates heat, causing aerosol to be released rapidly. Consequently, the center ring is rapidly heated and releases aerosol, resulting in rapid release of the first aerosol and sufficient aerosol concentration. However, after the aerosol in the center ring is exhausted, heat must be transferred to the adjacent rings. Due to the significantly wide air gaps between adjacent rings, heat is primarily transferred via radiation, resulting in low heat transfer efficiency. This not only results in uneven aerosol concentrations in the second and third puffs, but also necessitates higher temperatures for effective aerosol release. Raising the heating temperature contradicts the HNB concept of "low-temperature harm reduction."

[0030] To at least address the aforementioned issue of uneven aerosol release, embodiments of the present invention employ a heat-conducting structure disposed within the aerosol-generating matrix, extending from the center to the periphery of the matrix. The heat-conducting structure has a different thermal conductivity than the aerosol-generating material, resulting in different thermal conductivities from the center to the periphery of the aerosol-generating matrix. This allows the heat transfer efficiency in the radial direction of the aerosol-generating matrix to be adjusted based on the position of the heating element within the aerosol-generating matrix, thereby regulating the aerosol release and improving the uniformity of aerosol release.

[0031] In order to make the above-mentioned objects, features and beneficial effects of the embodiments of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] This application provides an aerosol generating substrate, see Figures 1 to 6 The aerosol generating matrix 1 is formed based on the aerosol generating material. A heat-conducting structure 11 is arranged inside the aerosol generating matrix 1. The heat-conducting structure 11 extends from the center to the periphery of the aerosol generating matrix 1, and the thermal conductivity of the heat-conducting structure 11 is different from the thermal conductivity of the aerosol generating material.

[0033] Among them, the heat-conducting structure 11 extends from the center to the periphery of the aerosol generating matrix 1. It can be extended from the center to the periphery along the radial direction of the aerosol generating matrix 1, or the heat-conducting structure 11 extends in a direction intersecting with the radial direction. It is only necessary to satisfy that after the heat-conducting structure 11 is set, the aerosol generating matrix 1 has different thermal conductivities from the center to the periphery.

[0034] In some embodiments, the aerosol generating material may include one or more of tobacco raw materials, aerosol generating agents, animal and plant extracts, flavors, adhesives and auxiliary materials. In the present invention, the composition of the aerosol generating material is not limited, and the aerosol generating material can be selected from some existing materials.

[0035] Tobacco raw materials can come from tobacco leaves, tobacco stems, etc. Aerosol generators can be propylene glycol, glycerin, etc. Animal and plant extracts can be common extracts, such as ambergris, musk, tobacco extract, tobacco nicotine, and monk fruit extract. Flavors can be common tobacco flavors, fruit flavors, or various compound flavors. Adhesives can be common natural adhesive materials such as animal and plant glues and polysaccharides. Auxiliary materials may include inorganic fillers, plant fibers, lubricants, emulsifiers, etc. These auxiliary materials are selected based on actual needs. Inorganic fillers can be calcium carbonate, diatomaceous earth, zeolite, etc., which provide pore-forming support and other functions. Plant fibers are generally made from plant materials and are processed and prepared similarly to tobacco leaves and stems, and can completely or partially replace tobacco raw materials. Lubricants can be beeswax, shellac, palm wax, etc., which can increase the uniformity of the extrusion process. Emulsifiers can be Tween, polyglycerol fatty acid esters, etc., which stabilize the flavor components.

[0036] The above scheme is adopted. By disposing a heat-conducting structure extending from the center to the periphery of the aerosol-generating matrix inside the aerosol-generating matrix, the thermal conductivity of the heat-conducting structure is different from the thermal conductivity of the aerosol-generating material, so that the thermal conductivity from the center to the periphery of the aerosol-generating matrix is different. In this way, it is possible to adjust the heat transfer efficiency in the radial direction of the aerosol-generating matrix according to the position of the heating element in the aerosol-generating matrix, thereby adjusting the amount of aerosol released and improving the uniformity of the aerosol release. It is ensured that the aerosol-generating material away from the heating element can also obtain sufficient heat and release it effectively, thereby ensuring that the aerosol-generating material away from the heating element can also release heat, thereby increasing or extending the number of puffs that can be taken from the aerosol-generating matrix, that is, improving the uniformity and sustainability of aerosol release.

[0037] In a specific implementation, the aerosol generating substrate 1 can have various structural forms, which are illustrated below with examples.

[0038] In some embodiments, see Figure 1 and Figure 2 The aerosol generating substrate 1 comprises a plurality of annular portions 12 and radial portions 13 surrounding the center of the aerosol generating substrate 1. It should be noted that: Figure 2 The annular portion 12 and the radial portion 13 are filled in gray to more intuitively show the relative positions of the annular portion 12 and the airway hole 14. The gray filling does not limit the scope of protection of this application.

[0039] The plurality of annular portions 12 are concentrically arranged and sequentially arranged from the center to the periphery of the aerosol-generating substrate 1 along the radial direction of the aerosol-generating substrate 1 .

[0040] The radial portion 13 extends through the plurality of annular portions 12. Along the radial direction of the aerosol-generating substrate 1, air passage holes 14 are defined between adjacent annular portions 12, wherein a heat-conducting structure 11 is disposed between adjacent annular portions 12. By disposing the heat-conducting structure 11 between adjacent annular portions 12 at the locations of the air passage holes 14, heat can be transferred between adjacent annular portions 12 both through radiation from the air passage holes 14 and through heat conduction from the heat-conducting structure 11. This improves the heat transfer between adjacent annular portions 12, allowing heat to be quickly transferred to adjacent annular portions 12, thereby facilitating heating of the aerosol-generating substrate 1 and rapid aerosol release.

[0041] In other embodiments, see Figure 3 and Figure 4The aerosol-generating substrate 1 includes a plurality of air passage holes 14 extending along the axial direction of the aerosol-generating substrate 1. The plurality of air passage holes 14 may be arranged in an annular pattern from the center to the periphery of the aerosol-generating substrate 1. One or more heat-conducting structures 11 are radiantly arranged along the radial direction of the aerosol-generating substrate 1.

[0042] In some other embodiments, see Figure 5 and Figure 6 ,exist Figure 3 and Figure 4 Based on the embodiment given, the heat-conducting structure 11 can also be arranged in a direction intersecting with the radial direction, but it still shows the direction of transferring heat from a position near the center to a position near the periphery. It should be noted that in order to more intuitively display the heat-conducting structure 11, the airway hole 14 and other structures in the aerosol generating matrix 11, Figure 4 and Figure 6 Different shades of gray are used to fill some physical structures, and the gray filling does not limit the scope of protection of this application.

[0043] In some embodiments, there are one or more heat-conducting structures 11. When there are multiple heat-conducting structures 11, the heat-conducting structures 11 can be evenly spaced radially in the aerosol-generating substrate 1. This allows for rapid and relatively uniform heat transfer, further improving the uniformity of aerosol release.

[0044] In a specific implementation, the heat conducting structure 11 can be arranged in a variety of ways, which are described below with examples.

[0045] In some embodiments, the heat-conducting structure 11 is provided on the radial portion 13. When the aerosol generating matrix 1 includes a plurality of radial portions 13, the heat-conducting structure 11 is provided on at least one of the radial portions 13. For example, a heat-conducting structure 11 is provided on all radial portions 13. For another example, a heat-conducting structure 11 is provided on some radial portions 13, and a heat-conducting structure 11 is provided on at least one of the two adjacent radial portions 13. It is understandable that in practice, there are other deformed layouts of the heat-conducting structure 11, which will not be given as examples here. By providing a heat-conducting structure 11 on the radial portion 13, the heat transfer effect to the adjacent annular portion 12 can be improved, and the airway holes 14 between the adjacent annular portions 12 can perform thermal isolation to ensure the focusing of heat, thereby achieving a balance between heat accumulation and heat transfer, and achieving a balance between the uniformity and sustainability of aerosol release.

[0046] Furthermore, the heat-conducting structure 11 is only provided in the radial portion, instead of adding heat-conducting material to the entire aerosol-generating matrix 1, so that when the aerosol-generating matrix 1 (i.e., the cigarette core) is actually heated, heat is quickly transferred to the adjacent annular portion 12 through the radial portion 13, and heat is accumulated through the portion of the aerosol-generating matrix 1 to which no heat-conducting material is added to quickly release the aerosol, thereby achieving a balance between heat accumulation and heat transfer, and producing a good aerosol release effect.

[0047] In other embodiments, the heat-conducting structure 11 is disposed along the radial direction of the aerosol-generating substrate 1 and penetrates the airway holes 14. The heat-conducting structure 11 penetrates the airway holes 14 in the radial direction, which can reduce the heat-blocking effect caused by the airway holes 14, improve heat transfer efficiency, and simultaneously take into account the heat-collecting effect of the airway holes 14, thereby achieving a balance between heat collection and heat transfer.

[0048] Furthermore, the heat-conducting structure 11 does not completely fill the airway holes 14 to achieve a balance between heat accumulation and heat transfer.

[0049] In yet other embodiments, the heat-conducting structure 11 is disposed radially along the aerosol-generating substrate and affixed to the inner wall of the airway aperture 14. This allows heat to be rapidly transferred from the heat-conducting structure 11 disposed on the inner wall of the airway aperture 14 to the adjacent annular portion 12, improving heat transfer efficiency. Furthermore, the presence of the airway aperture 14 not only converges the generated aerosol, but also provides a thermal barrier to the air within the airway aperture 14, achieving heat concentration and ultimately achieving a balance between heat accumulation and heat transfer.

[0050] In other embodiments, the heat-conducting structure 11 may also be arranged in a direction intersecting with the radial direction of the aerosol generating substrate 1 , as long as it is a direction that transfers heat from a position near the center to a position near the periphery.

[0051] In a specific implementation, the annular portion 12 has at least a portion without the heat-conducting structure 11 added, thereby preventing rapid heat transfer and accumulation, which would lead to rapid release of aerosol, thereby ensuring heat accumulation and further ensuring uniformity and continuity of aerosol release.

[0052] It is understandable that the heat-conducting structure 11 can also be arranged in the above-mentioned radial part, pass through the airway hole along the radial direction of the aerosol generating matrix, and be attached to two or more positions on the inner wall of the airway hole along the radial direction of the aerosol generating matrix.

[0053] In a specific implementation, the heat-conducting material used in the heat-conducting structure includes at least one of the following: granular heat-conducting material; sheet heat-conducting material. In other words, the heat-conducting material can be only granular heat-conducting material, only sheet heat-conducting material, or both granular heat-conducting material and sheet heat-conducting material.

[0054] In some embodiments, the material of the radial portion 13 of the aerosol-generating substrate 1 is different from that of the annular portion 12. The material of the radial portion 13 is doped with a granular thermally conductive material. The use of a granular thermally conductive material can make the thermal conductivity of the radial portion 13 relatively more uniform, thereby improving the efficiency of heat transfer from the radial portion 13 to the adjacent annular portion 12. This can ensure that the annular portion 12 away from the heating element can also obtain sufficient heat and effectively release it. Therefore, the annular portion 12 away from the heating element can also effectively heat and release aerosol, thereby increasing or extending the number of puffs of an aerosol-generating article using this aerosol-generating substrate 1.

[0055] When a heat-conducting material is doped into the radial portion 13 to form a heat-conducting structure, the aerosol-generating substrate 1 can be prepared by extrusion. The aerosol-generating material extruded at the radial portion 13 is doped with a granular heat-conducting material by an extrusion device to perform doping modification. This makes the extruded material of the radial portion 13 different from the extruded material of the annular portion 12, resulting in a difference in thermal conductivity between the radial portion 13 and the annular portion 12.

[0056] In other embodiments, the heat-conducting structure 11 is a sheet-like heat-conducting material, which can be inserted into the radial portion 13, arranged close to the inner wall of the airway hole 14 in the radial direction, or arranged across the airway hole 14 in the radial direction.

[0057] The aerosol-generating substrate 1 may be provided with multiple heat-conducting structures 11. Each heat-conducting structure 11 may comprise a single sheet of heat-conducting material, or may comprise multiple sheets of heat-conducting material. It should be noted that when the size of the heat-conducting sheet is equal to or smaller than a predetermined size, and if the extrusion process is sufficient, the material of the radial portion 13 may be doped with the heat-conducting sheet to prepare the aerosol-generating substrate 1 by extrusion.

[0058] In a specific implementation, the thermally conductive material includes at least one of the following: metal, graphite, graphene, silicon carbide, boron nitride, aluminum nitride, aluminum oxide, etc. The metal material may include gold, silver, copper, aluminum, iron, etc.

[0059] In a specific implementation, the relationship between the thermal conductivity of the heat-conducting structure 11 and the thermal conductivity of the aerosol-generating material may be different depending on the location of the heating element of the aerosol-generating substrate 1 .

[0060] In a typical scenario, the thermal conductivity of the heat-conducting structure 11 is greater than that of the aerosol-generating material. A hollow structure 15 is provided at the center of the aerosol-generating substrate 1, which is used to receive a heating element (not shown). This means that the aerosol-generating substrate 1 utilizes a central heating method.

[0061] The heat-conducting structure 11 is not in contact with the heating element. That is, the portion of the aerosol-generating substrate 1 near the heating element does not contain any heat-conducting material. This effectively concentrates heat to rapidly generate aerosol, preventing heat from being rapidly transferred to the periphery via the heat-conducting structure 11 and affecting the heat concentration in the central area, particularly affecting the first puff experience.

[0062] The aerosol generating substrate 1 can be heated by electric heating, and the heating element can be a resistance wire, a heating needle, a heating plate, etc. The heating element is inserted into the hollow structure 15 .

[0063] The aerosol generating substrate 1 can also be heated by electromagnetic heating, and the heating element includes a sensing piece for cooperating with electromagnetic induction heating, and the sensing piece is conductive, for example, the sensing piece can be a steel sheet, etc. The hollow structure 15 is used to receive the sensing piece.

[0064] In some non-limiting embodiments, the thermal conductivity of the heat-conducting structure 11 is the same along the radial direction of the aerosol-generating substrate 1, from the center to the periphery of the aerosol-generating substrate 1. The same thermal conductivity here means that the thermal conductivity fluctuation is within a set error range.

[0065] In other non-limiting embodiments, the thermal conductivity of the heat-conducting structure 11 decreases along the radial direction of the aerosol-generating substrate 1 from the center to the periphery of the aerosol-generating substrate 1. Since, from the center to the periphery of the aerosol-generating substrate 1, the radial dimensions are the same, the aerosol-generating material increases toward the periphery. Combined with the decreasing thermal conductivity from the center to the periphery of the aerosol-generating substrate 1, this allows for rapid heat conduction near the center, resulting in a relatively large amount of aerosol-generating material being heated. This helps maintain a consistent amount of heated aerosol-generating material per unit time, thereby improving the uniformity of aerosol concentration.

[0066] In another typical scenario, the thermal conductivity of the thermally conductive structure 11 is lower than that of the aerosol-generating material. For some aerosol-generating substrates 1 in which the thermal conductivity of the aerosol-generating material is relatively high, providing a thermally conductive structure 11 with a lower thermal conductivity than that of the aerosol-generating material within the aerosol-generating substrate 1 can create a thermal barrier, thereby concentrating heat and facilitating uniformity in the overall release of the aerosol.

[0067] In some non-limiting embodiments, the thermal conductivity of the heat-conducting structure 11 is constant or decreases along the radial direction of the aerosol-generating substrate 1 from the periphery to the center of the aerosol-generating substrate 1. The constant thermal conductivity herein means that the thermal conductivity fluctuation is within a set error range. In practice, the thermal conductivity of the heat-conducting structure 11 can be configured according to the requirements of the actual application scenario to improve the uniformity of the aerosol concentration.

[0068] The present application also provides an aerosol generating product, combined with Figure 7 The aerosol generating article 100 includes: any of the above-mentioned aerosol generating substrates 1. The specific structure and working principle of the aerosol generating substrate 1 can be found in the description of the above-mentioned embodiment, which will not be repeated here. Figure 7 In order to more intuitively display the structures of various parts in the aerosol generating product 100, different sections of the structure are filled with different styles. For example, the aerosol generating matrix 1 is filled with gray of different shades. The gray filling does not limit the scope of protection of this application.

[0069] The aerosol-generating article 100 may further comprise a filter segment 3 .

[0070] The aerosol-generating article 100 may further include a functional segment 2, located between the aerosol-generating substrate 1 and the filter segment 3. The functional segment 2 may serve as a support segment, a cooling segment, or a combination of both. The support segment is used to limit the space filled with the aerosol-generating material, while the cooling segment is used to reduce the temperature of the aerosol.

[0071] It should be noted that the aerosol generating article 100 may also include other segments, which are not listed one by one here.

[0072] A control experiment was set up, including a comparative example, example 1, and example 2. In the comparative example, the aerosol-generating matrix in the aerosol-generating article was prepared using only the aerosol-generating material, and the aerosol-generating matrix included a plurality of concentrically arranged annular portions and a radial portion extending through the annular portions. In example 1, the aerosol-generating matrix in the aerosol-generating article included a plurality of concentrically arranged annular portions and a radial portion extending through the annular portions, and the annular portions and the radial portion were made of different materials, wherein the radial portion was provided with a heat-conducting structure, and the heat-conducting material used in the heat-conducting structure was copper particles, and the copper particle doping ratio was 10%. In example 2, the aerosol-generating matrix in the aerosol-generating article included a plurality of concentrically arranged annular portions and a radial portion extending through the annular portions, and a heat-conducting structure was inserted into the radial portion, and the heat-conducting structure was an aluminum metal sheet.

[0073] Control experiment 1

[0074] The aerosol-generating articles provided in the Comparative Example, Example 1, and Example 2 all employed central heating at 370°C for release, with the same heating release procedure and detection parameters. The heating time for the first puff was 25 seconds, each puff was 55 ml, the puff time was approximately 2 seconds, the puff interval was 30 seconds, and a total of 13 puffs were taken. The aerosol release concentration was determined, as shown in Table 1 below, where the aerosol concentration is expressed as a percentage.

[0075] Table 1

[0076]

[0077] The results in Table 1 show that, compared to the comparative example, Examples 1 and 2 utilize thermally conductive materials to improve heat transfer efficiency, resulting in a uniform increase in vapor volume across each puff, reaching a plateau. In Examples 1 and 2, the difference in aerosol concentration with increasing puff count is minimal, resulting in improved aerosol release uniformity. In particular, concentration remains stable in the later stages, significantly increasing the number of puffs possible.

[0078] Control Experiment 2

[0079] The comparative example used central heating at 370°C for release, while Examples 1 and 2 used central heating at 350°C for release. The heating release procedure and detection parameters were the same, with the first puff heating time being 25 seconds, each puff being 55 ml, the puff time being approximately 2 seconds, the puff interval being 30 seconds, and a total of 13 puffs. The aerosol release concentration was determined, and the aerosol release concentrations are shown in Table 2 below, where the aerosol concentration is expressed as a percentage.

[0080] Table 2

[0081]

[0082] The results in Table 2 show that, compared to Comparative Example 1, which used a heating temperature of 370°C, Examples 1 and 2 reduced the heating temperature to 350°C, yet still achieved comparable aerosol release compared to the comparative example. Furthermore, the difference in aerosol concentration change with increasing puff count in Examples 1 and 2 was minimal, and the uniformity of aerosol release was superior to that of the comparative example. Thus, the aerosol-generating matrix provided by the embodiments of the present invention improves heat transfer efficiency through the use of a thermally conductive material, maintaining comparable aerosol release even at a lower heating temperature. This aligns with the HNB concept of low-temperature harm reduction, achieving the goal of lower temperatures and greater harm reduction.

[0083] It should be understood that the term "and / or" as used herein simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " as used herein indicates that the related objects are in an "or" relationship.

[0084] The term "plurality" used in the embodiments of the present application refers to two or more.

[0085] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. An aerosol-generating substrate, formed based on an aerosol-generating material, characterized in that A heat-conducting structure is arranged inside the aerosol generating substrate, and the heat-conducting structure extends from the center to the periphery of the aerosol generating substrate, and the thermal conductivity of the heat-conducting structure is different from the thermal conductivity of the aerosol generating material.

2. The aerosol-generating substrate according to claim 1, wherein The aerosol generating substrate includes a plurality of annular portions and radial portions surrounding the center of the aerosol generating substrate, wherein the radial portion penetrates the plurality of annular portions, and airway holes are provided between adjacent annular portions along the radial direction of the aerosol generating substrate, wherein a heat conducting structure is arranged between adjacent annular portions.

3. The aerosol-generating substrate according to claim 2, wherein The heat-conducting structure is provided at at least one of the following positions: the radial portion; penetrating the airway hole along the radial direction of the aerosol generating substrate; and attached to the inner wall of the airway hole along the radial direction of the aerosol generating substrate.

4. The aerosol-generating substrate according to claim 2, wherein The heat-conducting material used in the heat-conducting structure includes at least one of the following: granular heat-conducting material; sheet heat-conducting material.

5. The aerosol-generating substrate according to claim 4, wherein The radial portion of the aerosol-generating substrate is made of a material different from that of the annular portion, and the material of the radial portion is doped with a particulate thermally conductive material.

6. The aerosol-generating substrate according to claim 4, wherein The thermally conductive material includes at least one of the following: metal, graphite, graphene, silicon carbide, boron nitride, aluminum nitride, and aluminum oxide.

7. An aerosol-generating substrate according to any one of claims 1 to 6, characterized in that The thermal conductivity of the thermally conductive structure is greater than the thermal conductivity of the aerosol generating material.

8. The aerosol-generating substrate according to claim 7, wherein A hollow structure is provided at the center of the aerosol generating substrate, and the hollow structure is used to receive a heating element, wherein the heat-conducting structure is not in contact with the heating element.

9. The aerosol-generating substrate according to claim 7, wherein Along the radial direction of the aerosol-generating substrate, the thermal conductivity of the heat-conducting structure is the same or decreases from the center to the periphery of the aerosol-generating substrate.

10. An aerosol-generating substrate according to any one of claims 1 to 6, wherein The thermal conductivity of the thermally conductive structure is less than the thermal conductivity of the aerosol generating material.

11. An aerosol-generating article, characterized in that include: An aerosol-generating substrate as claimed in any one of claims 1 to 10.

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