Aerosol-forming substrates and aerosol-forming products

Abstract

The present application relates to the technical field of smoke-generating products and provides an aerosol-generating substrate (10) and an aerosol-generating product, the aerosol-generating substrate (10) having an airway (11) penetrating at least one end along the length of the aerosol-generating substrate (10), and in a cross section perpendicular to the length of the aerosol-generating substrate (10), the ratio of the total cross-sectional area of ​​the airway (11) to the cross-sectional area of ​​the aerosol-generating substrate (10) is between 5% and 95%. A ratio of the total cross-sectional area of ​​the airway (11) to the cross-sectional area of ​​the aerosol-generating substrate (10) between 5% and 95% not only achieves a balance between aerosol flow resistance, medium mass, and heating uniformity, but also reduces burning and uneven aerosol emission, improving the user's inhalation experience.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on a Chinese patent application bearing application number 202310079540.2, filed with the China Patent Office on January 20, 2023, and claims priority to the above-mentioned Chinese patent application, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the technical field of smoke-producing products, and in particular to aerosol-forming substrates and aerosol-forming products. [Background technology]

[0003] Smoke-generating products include those that form aerosols by combustion and those that form aerosols by a non-combustion method. A typical non-combustion smoke-generating product contains an aerosol-forming substrate, such as tobacco, flavoring, and / or atomizing agent, that can volatilize and generate an aerosol when heated. The smoke-generating product utilizes an external heat source to heat the aerosol-forming substrate to a temperature that is not high enough to cause combustion but still capable of releasing an aerosol, thereby carrying a large amount of atomizing agent. During use, the atomizing agent is released by high-temperature heating, forming an aerosol.

[0004] In the prior art, there are problems with inhaling smoke-producing products, such as high resistance to inhalation and uneven aerosol release during the user's inhalation process. Summary of the Invention

[0005] In view of this, an object of the present application is to provide an aerosol-generating substrate and an aerosol-generating product that can improve the uniformity of aerosol emission.

[0006] To achieve the above object, the present application provides an aerosol-generating substrate having an airway that penetrates at least one end of the aerosol-generating substrate along its longitudinal direction, and in a cross-section perpendicular to the longitudinal direction of the aerosol-generating substrate, the ratio of the total cross-sectional area of ​​the airway to the cross-sectional area of ​​the aerosol-generating substrate is between 5% and 95%.

[0007] In some embodiments, the ratio is between 40% and 85%.

[0008] In some embodiments, the airways comprise pores, the pores being disposed within the aerosol-generating substrate.

[0009] In some embodiments, the cross-sectional shape of the pores is circular, elliptical, sector-shaped, or polygonal.

[0010] In some embodiments, the number of pores is plural, and the pores are uniformly distributed in the aerosol-generating substrate.

[0011] In some embodiments, the number of the pores is plural, and all the pores are divided into plural pore units, and the plural pores of the pore unit are arranged along a first direction, and the plural pore units are arranged along a second direction, where the first direction and the second direction intersect.

[0012] In some embodiments, the pores of the pore unit are linearly arranged along the first direction, and the pore units are linearly arranged along the second direction.

[0013] In some embodiments, the pores of the pore unit are arranged circumferentially along the first direction, and the pore units are arranged interdigitated with one another along the second direction.

[0014] In some embodiments, the hydraulic diameter of each pore of a single pore unit is equal, and the hydraulic diameter of each pore unit gradually increases or decreases from the inside to the outside.

[0015] In some embodiments, the thickness of the partition wall between two adjacent pores of a single pore unit is equal, and the spacing between each pore unit gradually increases or decreases from the inside to the outside.

[0016] In some embodiments, the number of pores is plural and the pores are formed in the aerosol-generating substrate in a non-uniformly distributed manner.

[0017] In some embodiments, the hydraulic diameters of at least some of the pores are different.

[0018] In some embodiments, the thickness of the partition walls between at least some of the adjacent two pores is different.

[0019] In some embodiments, the aerosol-generating substrate comprises at least one first region and at least one second region, the first region having the pores and the second region not having the pores.

[0020] In some embodiments, the airway comprises a groove, the groove being provided in a peripheral surface of the aerosol-generating substrate.

[0021] In some embodiments, the cross-sectional shape of the groove is semicircular, semi-elliptical or polygonal.

[0022] In some embodiments, the airways extend through opposite longitudinal ends of the aerosol-generating substrate.

[0023] Embodiments of the present application further provide an aerosol-generating product, the aerosol-generating product comprising: an aerosol-generating substrate according to any one of the above; a functional segment provided at one end of the aerosol-generating substrate along its length, the functional segment including a filter segment for filtering the aerosol; and an exterior layer that surrounds the outer periphery of the functional segment and the outer periphery of the aerosol-generating substrate.

[0024] In some embodiments, the functional segment further comprises a temperature-reducing segment, the temperature-reducing segment being located between the filter segment and the aerosol-generating substrate.

[0025] The aerosol-generating substrates provided in the embodiments of the present application are heated to generate aerosol. When the ratio of the total cross-sectional area of ​​the airway to the cross-sectional area of ​​the aerosol-generating substrate is less than 5%, the total cross-sectional area of ​​the airway is small and the aerosol flow resistance is high, resulting in high resistance to inhalation and difficulty in inhalation. On the other hand, the aerosol-generating substrate has a large medium mass, which is unfavorable for heat penetration and / or diffusion. As a result, the aerosol-generating substrate heats up slowly during the heating process, the preheating time is long, and the heating is not uniform. When the ratio of the total cross-sectional area of ​​the airway to the cross-sectional area of ​​the aerosol-generating substrate is greater than 95%, the aerosol-generating substrate has a small medium mass, the aerosol release time is short, and heat penetrates very easily, resulting in the aerosol-generating substrate becoming burned. During the inhalation process, the aerosol-generating substrate is likely to exhibit uneven aerosol release, for example, a large amount of aerosol released during the first few puffs and a small amount of aerosol released during the subsequent few puffs, which can affect the user's experience. By adjusting the ratio of the total cross-sectional area of ​​the airway to the cross-sectional area of ​​the aerosol-generating substrate to between 5% and 95%, it is possible to balance the aerosol flow resistance, medium mass, and heating uniformity, as well as reduce the phenomenon of burning and uneven aerosol release, thereby improving the user's inhalation experience. [Brief explanation of the drawings]

[0026] [Figure 1]1 is a structural schematic diagram of a first type of aerosol-generating product according to one embodiment of the present application. [Figure 2] 2 is a half cross-sectional view of the first type of aerosol-generating product shown in FIG. 1. [Figure 3] FIG. 2 is a structural schematic diagram of a second type of aerosol-generating product according to one embodiment of the present application. [Figure 4] 1 is a schematic diagram of the structure of a first type of aerosol-generating substrate in one embodiment of the present application. [Figure 5] FIG. 1 is a schematic structural diagram of a second type of aerosol-generating substrate according to one embodiment of the present application. [Figure 6] FIG. 1 is a schematic structural diagram of a third type of aerosol-generating substrate according to one embodiment of the present application. [Figure 7] FIG. 1 is a schematic structural diagram of a fourth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 8] FIG. 1 is a schematic structural diagram of a fifth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 9] FIG. 1 is a schematic structural diagram of a sixth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 10] FIG. 1 is a schematic structural diagram of a seventh type of aerosol-generating substrate according to one embodiment of the present application. [Figure 11] FIG. 1 is a schematic structural diagram of an eighth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 12] FIG. 1 is a schematic structural diagram of a ninth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 13] FIG. 1 is a schematic diagram of the structure of a tenth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 14] FIG. 1 is a schematic diagram of the structure of an eleventh type of aerosol-generating substrate according to one embodiment of the present application. [Figure 15] FIG. 1 is a schematic diagram of the structure of a twelfth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 16] FIG. 1 is a schematic diagram of the structure of a thirteenth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 17] FIG. 1 is a schematic diagram of the structure of a 14th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 18]FIG. 1 is a schematic structural diagram of a 15th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 19] FIG. 1 is a schematic structural diagram of a 16th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 20] FIG. 1 is a schematic diagram of the structure of a 17th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 21] FIG. 1 is a schematic diagram of the structure of an 18th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 22] FIG. 1 is a schematic structural diagram of a 19th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 23] FIG. 1 is a schematic structural diagram of the 20th type of aerosol-generating substrate according to one embodiment of the present application. [Figure 24] FIG. 1 is a schematic diagram of the structure of the 21st type of aerosol-generating substrate according to one embodiment of the present application. [Figure 25] FIG. 1 is a schematic diagram of the structure of the 22nd type of aerosol-generating substrate according to one embodiment of the present application. [Figure 26] FIG. 1 is a structural schematic diagram of a third type of aerosol-generating product according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0027] It should be noted that, unless inconsistent, the examples and technical features in the examples in this application can be combined with each other, and the detailed description of the specific embodiments should be understood to be for the purpose of explaining the gist of this application and should not be considered as an undue limitation on this application.

[0028] 4 to 25, an embodiment of the present application provides an aerosol-generating substrate 10. The aerosol-generating substrate 10 is heated and used to generate an aerosol.

[0029] For example, the aerosol-generating substrate 10 can be used to generate an aerosol by a heating and combustion method. The aerosol-generating substrate 10 can also be used to generate an aerosol by a heating and non-combustion method. That is, the aerosol-generating substrate 10 generates an aerosol by heating below its ignition point. The aerosol-generating substrate 10 does not burn during the process of generating an aerosol.

[0030] 4 to 25, the aerosol-generating substrate 10 has an airway 11 that passes through at least one end along the length of the aerosol-generating substrate 10. The airway 11 is used to collect and distribute the aerosol.

[0031] In a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the ratio of the total cross-sectional area of ​​the airways 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 is between 5% and 95%. Illustratively, the ratio of the total cross-sectional area of ​​the airways 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 is 5%, 5.5%, 6%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 71%, 72%, 75%, 77%, 80%, 83%, 84%, 85%, 88%, 90%, 91%, 93%, or 95%.

[0032] The aerosol-generating substrate 10 provided in the embodiments of the present application is used in an aerosol-generating product. Referring to Figures 1 to 3, the aerosol-generating product includes the aerosol-generating substrate 10 of any embodiment of the present application, a functional segment 20, and an exterior layer 30. The functional segment 20 is provided at one end along the length of the aerosol-generating substrate 10, and includes a filter segment 21 for filtering the aerosol. The exterior layer 30 surrounds the outer periphery of the functional segment 20 and the outer periphery of the aerosol-generating substrate 10.

[0033] The filter segment 21 is used to filter the aerosol generated by the aerosol-generating substrate 10 .

[0034] The aerosol-generating product is used by a user to inhale the aerosol generated by the aerosol-generating substrate 10. For example, a user can hold the filter segment 21 in their mouth and inhale the filtered aerosol. The aerosol generated by the aerosol-generating substrate 10 is transported to the filter segment 21 by the airway 11 under the action of negative suction pressure.

[0035] The aerosol-generating substrate 10 provided in the examples of the present application is heated to generate an aerosol. If the ratio of the total cross-sectional area of ​​the airway 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 is less than 5%, on the one hand, the total cross-sectional area of ​​the airway 11 is small and the aerosol flow resistance is large, resulting in high inhalation resistance when the user inhales, making inhalation difficult. On the other hand, the aerosol-generating substrate 10 has a large medium mass, which is unfavorable for heat penetration and / or diffusion, resulting in a slow heating rate, long pre-heating times, and poor heating uniformity during the heating process. If the ratio of the total cross-sectional area of ​​the airways 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 exceeds 95%, the aerosol-generating substrate 10 will have a small media mass, a short aerosol release time, and heat will penetrate very easily, causing the aerosol-generating substrate 10 to burn. This can lead to uneven aerosol release during the inhalation process, such as a large amount of aerosol released during the first few puffs and a small amount released during the latter few puffs, which can affect the user's inhalation experience. By setting the ratio of the total cross-sectional area of ​​the airways 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 between 5% and 95%, it is possible to achieve a balance between aerosol flow resistance, media mass, and heating uniformity, as well as reduce burning and uneven aerosol release, thereby improving the user's inhalation experience.

[0036] The aerosol-generating product is used in combination with an aerosol-generating device having a heating assembly, which heats and atomizes the aerosol-generating substrate 10 to generate the aerosol.

[0037] There are several heating modes for the heating assembly, and illustratively, the heating modes include central heating, peripheral heating, and / or bottom heating. The central heating mode refers to a mode in which the heating assembly is inserted inside the aerosol-generating product and heats the aerosol-generating product by toasting it from the inside out. The peripheral heating mode refers to a mode in which the heating assembly is placed around the outside of the aerosol-generating product and heats it by toasting it from the outside in. The bottom heating mode refers to a mode in which the heating assembly is located below the aerosol-generating product and first heats the air using the heating assembly, and then the hot air toasts and heats the aerosol-generating product from below up.

[0038] The heating assembly may be configured to generate heat using, but is not limited to, resistive heating, electromagnetic heating, infrared heating, microwave heating, or laser heating.

[0039] In some embodiments, referring to FIG. 2, the functional segment 20 may be provided with only a filter segment 21 .

[0040] 26, in some other embodiments, the functional segment 20 further includes a temperature-reducing segment 22, which is located between the filter segment 21 and the aerosol-generating substrate 10. The temperature-reducing segment 22 is used to reduce the temperature of the aerosol before it is filtered by the filter segment 21. The temperature-reducing segment 22 can improve the "hot mouth" phenomenon when a user inhales the aerosol.

[0041] The exterior layer 30 may include, but is not limited to, one or more combinations of materials such as fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, polyethylene (PE), and polybutylene adipate terephthalate (PBAT).

[0042] The temperature-reducing material employed by the temperature-reducing segment 22 includes, but is not limited to, one or more combinations of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber.

[0043] The filtering material employed by the filter segment 21 includes, but is not limited to, one or more combinations of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber.

[0044] The materials of the temperature-reducing segment 22 and the filter segment 21 may be the same or different.

[0045] In some embodiments, the aerosol-generating substrate 10 may have a substantially cylindrical structure, i.e., the aerosol-generating substrate 10 is substantially elongated rather than flake-like, with the longitudinal dimension of the aerosol-generating substrate 10 being greater than the maximum distance between any two points on its cross-section.

[0046] For example, the cross-sectional shape of the aerosol-generating substrate 10, measured in a cross section perpendicular to the longitudinal direction thereof, may be, but is not limited to, a circle, an ellipse, a track, or a polygon. When the cross-sectional shape of the aerosol-generating substrate 10 is one of the above regular shapes, product consistency is improved and product quality control is facilitated. In the examples of the present application, the cross-sectional shape of the aerosol-generating substrate 10 is described as being circular, i.e., cylindrical. The longitudinal size of the aerosol-generating substrate 10 is greater than the maximum distance between two points on the cross-section, e.g., the diameter.

[0047] The specific components of the aerosol-generating substrate 10 are not limited herein, and for example, in one embodiment, the aerosol-generating substrate 10 may include a botanical component, an adjuvant component, a smoke generating component, an adhesive component, etc.

[0048] In one embodiment, the botanical ingredients are one or more combinations of powders formed by grinding tobacco leaf stock, tobacco shreds, tobacco stems, tobacco powder, flavor plants, etc. The botanical ingredients are used to generate an alkaloid-containing aerosol upon heating.

[0049] In one embodiment, the auxiliary component may be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Here, the inorganic fillers include one or more combinations of ground calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic fillers can provide skeletal support for the plant components and, because they also have micropores, can increase the porosity of the wall material after the plant components are molded, thereby improving the aerosol release rate.

[0050] The lubricant may be one or more of the following: candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, palmitic acid. The lubricant can improve particle flow, reduce inter-particle friction, make the particle distribution more uniform, reduce the pressure required for molding, and reduce mold wear.

[0051] The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can, to a certain extent, mitigate the loss of flavoring substances during storage, increase the stability of flavoring substances, and improve the sensory quality of the product.

[0052] The function of the smoke injector component is to generate a large amount of vapor upon heating, thereby improving the aerosol yield of the smoke product. In one embodiment, the smoke injector may include, for example, one or more combinations of monohydric alcohols (e.g., menthol), polyhydric alcohols (e.g., propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin), esters of polyhydric alcohols (e.g., monoacetin, diacetin, or triacetin), aliphatic esters of monocarboxylic acids, polycarboxylic acids (e.g., lauric acid, myristic acid), or polycarboxylic acids (e.g., dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, mesoerythritol, diacetin mixtures, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0053] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from natural plants, and includes one or more combinations of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The binder is used to make the particles stick together and prevent them from scattering, and also improves the water resistance of the aerosol-generating substrate, is harmless to the human body, and has certain health benefits.

[0054] In one embodiment, the aerosol-generating substrate 10 has a monolithic structure. For example, the aerosol-generating substrate 10 can be a monolithic structure formed by a process such as injection molding, compression molding, or extrusion. Here, extrusion refers to a processing method in which a raw material mixture is fed into an extruder, and the raw material mixture is heated and plasticized by the action between the barrel and screw of the extruder while being extruded forward by the screw. The raw material mixture then passes continuously through a die to produce finished or semi-finished products with various cross sections. The aerosol substrate formed by extrusion is rod-shaped. This allows the aerosol-generating substrate 10 to remain a monolithic medium even after being heated and sucked, or after heat exposure is stopped, and is less likely to collapse and fall off. This solves the problems of flake-like, dispersed particle-like, and filament-like aerosol-generating substrates in the prior art, such as loose flakes, shedding of filamentous and particle-like components, and difficulty in cleaning.

[0055] In one embodiment, the ratio is between 40% and 85%. Illustratively, the ratio of the total cross-sectional area of ​​the airways 11 to the cross-sectional area of ​​the aerosol-generating substrate 10 may be 40%, 40.5%, 41%, 42%, 43%, 44%, 45%, 48%, 50%, 51%, 52%, 55%, 59%, 60%, 61%, 65%, 67%, 68%, 69%, 71%, 73%, 74%, 76%, 77%, 78%, 79%, 81%, 82%, 84.5%, or 85%. By designing it in this way, the total cross-sectional area of ​​the airway 11 is appropriate, the airflow resistance is appropriate, and the medium mass of the aerosol-generating substrate 10 is appropriate, which not only improves the structural strength of the aerosol-generating substrate 10 and stably maintains its overall shape, but also ensures that the aerosol emission amount of the aerosol-generating substrate 10 is appropriate, is uniformly heated, and emits aerosol evenly, the aerosol emission time is appropriate, and the number of inhalations is suited to customer requirements, avoiding situations such as insufficient inhalation or excessive waste, and providing a good inhalation experience for the user.

[0056] 24 and 25, in one embodiment, the airway 11 penetrates one end of the aerosol-generating substrate 10 along its length, and the other end of the airway 11 is closed. This allows the airway 11 to both store the aerosol and accelerate its deposition. In a non-inhalation state, the aerosol is released and stored in the airway 11. During inhalation, the airflow velocity on the lip-proximal side of the aerosol-generating substrate 10 is high, i.e., the air pressure is low, causing the aerosol stored in the airway 11 to deposit and be available for inhalation by the user. During the inhalation process, the user has a pause, i.e., a break, providing conditions for the aerosol to be replenished in the airway 11. If the pause is too long, the aerosol in the airway 11 will overflow into the aerosol-generating substrate 10, ensuring that the amount of aerosol in the airway 11 remains uniform, thereby ensuring the user's consistent inhalation.

[0057] The lip distal side refers to the side farther from the user's lips, and the lip proximal side is the opposite side to the lip distal side.

[0058] 2 and 4 to 23, in some embodiments, the airway 11 penetrates both ends of the aerosol-generating substrate 10 that are opposite to each other in the longitudinal direction. Airflow can flow from one end of the aerosol-generating substrate 10 to the other end of the aerosol-generating substrate 10. This allows the airflow formed by the air and the aerosol to flow more smoothly, reducing the flow resistance of the airflow, significantly reducing the resistance to inhalation during inhalation and improving the inhalation experience.

[0059] In some embodiments, referring to Figure 24, all of the airways 11 extend through the same end of the aerosol-generating substrate 10 along its length, with the other ends all being closed, i.e., all of the pores 111 and / or grooves 112 open towards the same end.

[0060] In some other embodiments, referring to Figure 25, some airways 11 penetrate one end of the aerosol-generating substrate 10 along its length, and other some airways 11 penetrate the other end of the aerosol-generating substrate 10 along its length.

[0061] In some other embodiments, referring to Figures 4 to 23, each airway 11 penetrates both ends of the aerosol-generating substrate 10 that are opposite in the longitudinal direction, and airflow can flow from one end of the aerosol-generating substrate 10 along the longitudinal direction through the airway 11 to the other end of the aerosol-generating substrate 10 along the longitudinal direction.

[0062] 4 to 19, in one embodiment, the air passage 11 includes pores 111, which are provided inside the aerosol-generating substrate 10. For example, the pores 111 may be through-holes that penetrate both ends of the aerosol-generating substrate 10 that are opposite to each other in the longitudinal direction. The pores 111 are surrounded by the peripheral surface of the aerosol-generating substrate 10. The pores 111 can collect aerosol and provide a good flow guidance function.

[0063] It should be understood that the pores 111 may extend through only one end of the aerosol-generating substrate 10 .

[0064] Illustratively, the cross-sectional area of ​​the pores 111 is 0.0019 mm 2 ~30mm 2 (square millimeters). For example, 0.002 mm 2 , 0.1mm 2 , 0.2mm 2 , 0.4mm 2 , 0.5mm 2 , 0.8mm 2 , 1mm 2 , 1.3mm 2 , 1.6mm 2 , 1.8mm 2 , 2mm 2 , 2.1mm 2 , 2.2mm 2 , 2.4mm 2 , 2.6mm 2 , 2.8mm 2 , 3mm2 , 4mm 2 , 5mm 2 or 6mm 2 And so on.

[0065] In the examples of this application, the cross-sectional area refers to the cross-sectional area of ​​the flow path.

[0066] The cross-sectional area of ​​the pore 111 is 30 mm 2 If the temperature exceeds this value, the number of pores 111 will be relatively small, the aerosol-generating substrate 10 will be prone to burning, and the aerosol-generating substrate 10 will be prone to uneven aerosol emission during the heating process (for example, a large amount of aerosol will be emitted in the first two puffs and a small amount in the subsequent puffs), which will affect the user's smoking experience.

[0067] The cross-sectional area of ​​the pore 111 is 0.0019 mm 2 If it is less than this, the molding process becomes significantly more difficult, it becomes difficult to control the size of the pores 111, and the reject rate of the aerosol-generating substrate 10 increases.

[0068] The cross-sectional area of ​​the pore 111 is 0.0019 mm 2 ~30mm 2 Within this range, the flow resistance of the aerosol-generating substrate 10 is relatively small (i.e., the suction resistance is relatively small), the aerosol flow rate is appropriate, the aerosol inside the aerosol-generating substrate 10 is easily extracted, the aerosol is released more uniformly and the utilization rate is high, the aerosol-generating substrate 10 is less likely to burn, the user experience is relatively good, and the processing and manufacturing are easy.

[0069] Preferably, the cross-sectional area of ​​the pores 111 is 0.007 mm 2 ~7.1mm 2 (square millimeters). For example, 0.1 mm 2 , 0.2mm 2 , 0.4mm 2 , 0.5mm 2 , 0.8mm 2 , 1mm 2 , 1.3mm2 , 1.6mm 2 , 1.8mm 2 , 2mm 2 , 2.1mm 2 , 2.2mm 2 , 2.4mm 2 , 2.6mm 2 , 2.8mm 2 or 3mm 2 And so on.

[0070] For example, the hydraulic diameter of the pores 111 is 0.05 mm to 6 mm (millimeters), such as 0.05 mm, 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 4 mm, 5 mm, or 6 mm.

[0071] In the examples of the present application, the hydraulic diameter refers to the ratio of four times the cross-sectional area of ​​the flow path to the perimeter. The cross-section of the flow path refers to a cross section taken perpendicular to the fluid flow, i.e., the cross section of the pore 111. For example, if the cross-sectional shape of the pore 111 is a square, the hydraulic diameter is the ratio of four times the cross-sectional area of ​​the square pore 111 to the perimeter of the square. In another example, if the cross-sectional shape of the pore 111 is circular, the hydraulic diameter is the diameter of the circular pore 111.

[0072] If the hydraulic diameter of the pores 111 exceeds 6 mm, the number of pores 111 will be relatively small, making it easier for the smoke-generating medium segment 10 to burn, and the smoke-generating medium segment 10 is more likely to emit uneven aerosol during the heating process (e.g., the first two puffs emit a large amount of aerosol, while the subsequent puffs emit less), which will affect the user's smoking experience.

[0073] If the hydraulic diameter of the pores 111 is less than 0.05 mm, the molding process becomes significantly more difficult, the size of the pores 111 becomes difficult to control, and the reject rate of the smoke medium segments 10 increases.

[0074] When the hydraulic diameter of the pores 111 is within the range of 0.05 mm to 6 mm, the flow resistance of the smoke-generating medium segment 10 is relatively small (i.e., the suction resistance is relatively small), and the aerosol flow rate is appropriate, the aerosol inside the smoke-generating medium segment 10 is easily extracted, the aerosol is released more uniformly and the utilization rate is high, the smoke-generating medium segment 10 is less likely to burn, the user experience is relatively good, and it is easy to process and manufacture.

[0075] In some embodiments, the hydraulic diameter of the pores 111 is between 0.1 mm and 3 mm (millimeters), such as 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, etc.

[0076] In one embodiment, referring to FIGS. 20 to 23 , the airway 11 includes a groove 112, which is provided on the peripheral surface of the aerosol-generating substrate 10. Exemplarily, the groove 112 may penetrate both ends of the aerosol-generating substrate 10 that are opposite to each other in the longitudinal direction. Specifically, the groove 112 has a notch that opens outward. Exemplarily, a portion of the peripheral surface of the aerosol-generating substrate 10 is recessed to form the groove 112, which corresponds to the groove 112 being visible from the peripheral surface of the aerosol-generating substrate 10. Meanwhile, the groove 112 increases the external surface area of ​​the aerosol-generating substrate 10, improving heat conduction efficiency and further enhancing the extraction of active ingredients. Exemplarily, when the heating method is ambient heating, this method can adjust the heating rate of the entire aerosol-generating substrate 10 and improve the consumer experience. Exemplarily, the outer periphery of the aerosol-generating substrate 10 is wrapped in an exterior layer 30, which can close the notch of the groove 112. For example, the outer layer 30 and the groove 112 cooperate to form through holes that open at opposite ends of the aerosol-generating substrate 10 in the longitudinal direction, thereby providing a guideway effect that limits the longitudinal flow of the aerosol and external air, increasing the amount of air flowing in and improving the aerosol extraction efficiency.

[0077] 4-6, in some embodiments, the airway 11 may include only one pore 111. In this case, the total cross-sectional area of ​​the airway 11 is the cross-sectional area of ​​the one pore 111.

[0078] 7 to 19, in some other embodiments, the airway 11 may include a plurality of pores 111 and may not include a groove 112. In this case, the total cross-sectional area of ​​the airway 11 is the total cross-sectional area of ​​the plurality of pores 111. In other words, the total cross-sectional area of ​​the airway 11 is the sum of the cross-sectional areas of the plurality of pores 111.

[0079] 21 to 23, in still other embodiments, the airway 11 may include at least one pore 111 and at least one groove 112. In this case, the total cross-sectional area of ​​the airway 11 is the sum of the cross-sectional areas of all the pores 111 and all the grooves 112.

[0080] 20, in still other embodiments, the airway 11 may include at least one groove 112 and no pores 111. In this case, the total cross-sectional area of ​​the airway 11 is the total cross-sectional area of ​​all the grooves 112. In other words, the total cross-sectional area of ​​the airway 11 is the sum of the cross-sectional areas of all the grooves 112.

[0081] In one embodiment, referring to Figures 4 to 19, the cross-sectional shape of the pores 111 is circular, elliptical, sector-shaped, or polygonal. Polygons include, but are not limited to, triangles, squares, pentagons, and hexagons. Squares may be regular squares or diamonds. When the cross-sectional shape of the pores 111 is a regular shape, product consistency is improved and product quality control is facilitated.

[0082] 20 to 23, in one embodiment, the cross-sectional shape of the groove 112 is semicircular, semi-elliptical, or polygonal. Polygons include, but are not limited to, triangles, squares, pentagons, and hexagons. Squares may also be regular squares or diamonds. When the cross-sectional shape of the groove 112 is a regular shape, product consistency is improved and product quality control is facilitated.

[0083] In some embodiments, referring to Figure 2, the pore 111 may be a straight pore, i.e., a single pore 111 extending in a straight line along the length of the aerosol-generating substrate 10. This makes the pore 111 easier to mold and less difficult to manufacture.

[0084] 2, in some embodiments, the pores 111 have the same cross-sectional area at any position along the length of the aerosol-generating substrate 10. For example, if the cross-sectional shape of the pores 111 is circular, the diameter of the pores 111 at any position along the length of the aerosol-generating substrate 10 is the same, i.e., the pores 111 are equidiameter pores.

[0085] 20 to 23, in some embodiments, the single groove 112 may extend linearly along the length of the aerosol-generating substrate 10. This makes the groove 112 easier to mold and less difficult to manufacture.

[0086] In some embodiments, and with reference to Figures 20 to 23, the grooves 112 have equal cross-sectional area at any point along the length of the aerosol-generating substrate 10.

[0087] In the examples of the present application, unless otherwise specified, the length direction refers to the length direction of the aerosol-generating substrate 10.

[0088] 7, 10, and 15, in one embodiment, the aerosol-generating substrate 10 has a plurality of pores 111, which are uniformly distributed. This design ensures that the distribution of medium mass at different locations on the aerosol-generating substrate 10 is approximately the same, and that the cross-sectional areas of the pores 111 in different media on the aerosol-generating substrate 10 are also approximately the same. This tends to result in consistent aerosol release and flow resistance for different media on the aerosol-generating substrate 10, thereby improving the uniformity of aerosol release during inhalation and ensuring that the amount of aspiration per inhalation is approximately the same, resulting in improved inhalation consistency and a better inhalation experience.

[0089] Although the manner of realizing the uniform distribution of the pores 111 is not limited, for example, in some embodiments, referring to Figures 7, 10, and 15, the uniform distribution of the pores 111 includes that the cross-sectional area of ​​each pore 111 is the same and the thickness of the partition walls of adjacent pores 111 is the same. For example, the cross-sectional area of ​​each pore 111 is the same, and the pores 111 are distributed in a matrix or concentric circle pattern. In other words, the arrangement of the pores 111 themselves is uniform.

[0090] It should be understood that the pores 111 may be non-uniform within the cross-section of the aerosol-generating substrate 10, i.e., the pores 111 are uniformly distributed, but do not divide the entire aerosol-generating substrate 10 uniformly. For example, if the aerosol-generating substrate 10 has a circular cross-section, the pores 111 distributed in a matrix are not uniformly distributed within the circular cross-section.

[0091] The configuration in which the cross-sectional areas of the pores 111 are the same can be achieved by having the same cross-sectional shape and the same hydraulic diameter of the cross-section of each pore 111. For example, the cross-sectional shape of each pore 111 can be circular and the cross-sectional diameter can be the same.

[0092] 7 to 23, in one embodiment, the number of pores 111 is plural, all pores 111 are divided into a plurality of pore units, and the pores 111 of a pore unit are arranged along a first direction, and the pore units are arranged along a second direction, where the first direction and the second direction intersect. In this way, by arranging all pores 111 two-dimensionally, the structural strength of the aerosol-generating substrate 10 and the amount of aerosol emitted can be both achieved.

[0093] In one embodiment, referring to Figures 7 to 14 and 21 to 23, the pores 111 of a pore unit are linearly arranged along a first direction, and the pore units are linearly arranged along a second direction. For example, all the pores 111 are distributed in a matrix or lattice pattern. This allows all the pores 111 to be regularly arranged, which makes it easier to design and calculate the total cross-sectional area of ​​the pores 111 and ultimately allows the total cross-sectional area of ​​the air passages 11 to be controlled.

[0094] As can be understood, regular arrangement refers to an arrangement according to a predetermined rule.

[0095] In one embodiment, referring to FIGS. 15 to 19, the pores 111 of the pore unit are arranged circumferentially along a first direction, and the pore units are sequentially interdigitated along a second direction. That is, all the pores 111 are distributed in a plurality of interdigitated rings. For example, each ring may be a circular ring, and the centers of the rings may or may not coincide. If the centers of the rings coincide, the interdigitated rings form a plurality of concentric rings. This allows all the pores 111 to be regularly arranged, which facilitates the design and calculation of the total cross-sectional area of ​​the pores 111 and ultimately allows the total cross-sectional area of ​​the airway 11 to be controlled. For example, by adjusting the spacing between different rings and / or the number of pores 111 in the same ring, the distribution of the medium mass in the aerosol-generating substrate 10, the heating rate at different locations, and / or the aerosol flow resistance can be adjusted, thereby improving the user's inhalation experience.

[0096] 15 to 19, in one embodiment, all the pores 111 are distributed in a plurality of interdigitated rings, and the pores 111 of two adjacent pore units are staggered. In other words, in two adjacent pore units, each pore 111 of one pore unit is located between two adjacent pores 111 of the other pore unit. By distributing the pores in this manner, even when the size of the aerosol-generating substrate 10 is limited, the thickness of the partition between the pores 111 of the two adjacent pore units is appropriate, and the thickness of the partition is neither too thin nor too thick. This allows the aerosol to be released uniformly and stably into the pores 111, and prevents the phenomenon of inconsistent aerosol release at different locations on the aerosol-generating substrate 10.

[0097] In some embodiments, referring to Figures 7 and 9, the number of pores 111 in each pore unit may be equal.

[0098] 7, in one embodiment, taking a matrix-like distribution as an example, each pore unit has three pores 111, and the total number of pores 111 is three, resulting in a total of nine pores 111. Three pores 111 in a pore unit are linearly arranged along a first direction, and three pore units are linearly arranged along a second direction. Furthermore, the nine pores 111 have the same cross-sectional shape and cross-sectional area, and the thickness of the partition between any two adjacent pores 111 is also the same. As a result, the nine pores 111 are formed on the aerosol-generating substrate 10 in a uniformly distributed manner, and the aerosol is uniformly released into the pores 111, with the release from each pore 111 being uniform and stable.

[0099] In some embodiments, referring to FIGS. 8, 10-14, the number of pores 111 in at least some of the pore units may be different.

[0100] 10 to 14, in one embodiment, some pore units may have the same number of pores 111, and the remaining pore units may have a different number of pores 111. In another embodiment, all pore units may have a different number of pores 111. That is, the number of pores 111 in each pore unit may be different.

[0101] 10, in one embodiment, the pores 111 of a pore unit are linearly arranged along a first direction, and the pores 111 are linearly arranged along a second direction, and in the second direction, the number of pores 111 in the pore unit decreases in an arithmetic progression from the center to both sides, i.e., the pore units are distributed axially symmetrically in the second direction.

[0102] 10, taking a grid-like distribution as an example, the number of pore units is five, and the five pore units are linearly arranged along the second direction, and the number of pores 111 in the pore units in the second direction gradually decreases from five to three from the center to both sides. That is, the number of pores 111 in one pore unit located in the center is five, the number of pores 111 in two pore units adjacent to the center is four, and the number of pores 111 in two pore units located on the outermost sides is three.

[0103] In one embodiment, referring to FIG. 15 , the pores 111 of the pore unit are arranged circumferentially along a first direction, and the number of pores 111 of the pore unit increases in an arithmetic progression from the inside to the outside along a second direction.

[0104] For example, in one embodiment, referring to FIG. 15 , taking a plurality of interdigitated annular distributions as an example, the number of pore units is two, the number of pores 111 of the inner pore unit along the second direction is eight, and the number of pores 111 of the outer pore unit along the second direction is twelve.

[0105] 16, in some embodiments, the hydraulic diameter of each pore 111 in a single pore unit is equal, and the hydraulic diameter of each pore unit gradually increases or decreases from the inside to the outside, allowing the aerosol-generating substrate 10 to be adapted to different heating regimes.

[0106] For example, in one embodiment, the hydraulic diameter of each pore 111 in a single pore unit is equal, and the hydraulic diameter of each pore unit gradually increases from the inside to the outside. This makes the aerosol-generating substrate 10 suitable for a central heating method. This is because the inner region of the aerosol-generating substrate 10 has a larger medium mass than the outer region, which increases the time required for heat transfer from the inside to the outside. This extends the heating time of the outer region, improving the overall uniformity of aerosol emission and allowing for increased suction time and / or number of suctions to maintain the consistency of aerosol emission.

[0107] 17, in another embodiment, the hydraulic diameter of each pore 111 in a single pore unit is equal, and the hydraulic diameter of each pore unit gradually decreases from the inside to the outside. This makes the aerosol-generating substrate 10 suitable for adopting an ambient heating method. This is because the mass of the medium in the outer region of the aerosol-generating substrate 10 is large and the mass of the medium in the inner region is small, which increases the time required for heat to be transferred from the outside to the inside, thereby extending the heating time of the inner region, improving the overall uniformity of aerosol emission, increasing the suction time and / or number of suctions, and maintaining the consistency of aerosol emission.

[0108] 18 and 19, in some embodiments, the thickness of the partitions between two adjacent pores 111 in a single pore unit is equal, and the spacing between each pore unit gradually increases or decreases from the inside to the outside, allowing the aerosol-generating substrate 10 to be adapted to different heating methods.

[0109] Spacing is understood to refer to the minimum distance between two adjacent pore units.

[0110] 18, in one embodiment, the thickness of the partitions between two adjacent pores 111 in a single pore unit is equal, and the spacing between each pore unit gradually increases from the inside to the outside. This makes the aerosol-generating substrate 10 suitable for adopting an ambient heating method. This is because the mass of the medium in the outer region of the aerosol-generating substrate 10 is larger than the mass of the medium in the inner region, which increases the time required for heat to transfer from the outside to the inside. This extends the heating time of the inner region, improving the overall uniformity of aerosol emission and increasing the suction time and / or number of suctions, thereby maintaining the consistency of aerosol emission.

[0111] 19, in another embodiment, the thickness of the partitions between two adjacent pores 111 in a single pore unit is equal, and the spacing between each pore unit gradually decreases from the inside to the outside. This makes the aerosol-generating substrate 10 suitable for a central heating method. This is because the mass of the medium in the inner region of the aerosol-generating substrate 10 is larger than the mass of the medium in the outer region, which increases the time required for heat to be transferred from the inside to the outside. This extends the heating time of the outer region, improving the overall uniformity of aerosol emission and increasing the suction time and / or number of suctions, thereby maintaining the consistency of aerosol emission.

[0112] 16 to 19, in one embodiment, the aerosol-generating substrate 10 has a plurality of pores 111, which are unevenly distributed. The unevenly distributed pores 111 can be adapted to different heating modes, which not only ensures uniform heating of the aerosol-generating substrate 10 but also ensures consistency of the aerosol during the first and last puffs of the inhalation process.

[0113] Although the manner in which the non-uniform distribution of the pores 111 is realized is not limited, for example, in some embodiments, referring to Figures 8, 16, and 17, the hydraulic diameters of at least some of the pores 111 are different. That is, the hydraulic diameters of some of the pores 111 may be configured to be different, or all of the pores 111 may be configured to be different. In this way, by adjusting the hydraulic diameters of the pores 111, the cross-sectional area of ​​the pores 111 can be adjusted, thereby realizing the non-uniform distribution of the pores 111.

[0114] 18 and 19, in some embodiments, the thickness of the partition wall between at least some of two adjacent pores 111 is different. In this manner, by adjusting the thickness of the partition wall between two adjacent pores 111, a non-uniform distribution can be achieved.

[0115] In some embodiments, the aerosol-generating substrate 10 comprises at least one first region and at least one second region, the first region having pores 111 and the second region not having pores 111. By distributing the pores 111 among the regions in this manner, a uniform or non-uniform distribution of the pores 111 can be achieved.

[0116] In another embodiment, the central region is divided into at least one first region and at least one second region, the cross-sectional areas of the first region and the second region are equal and axially symmetrically distributed, and the pores 111 in the first region are uniformly or non-uniformly distributed, so that all the pores 111 can be uniformly distributed.

[0117] In some embodiments, the aerosol-generating substrate 10 has a plurality of pores. Specifically, the pores communicate with each other and with the surface of the material. For example, the pores communicate with each other and with the surface of the air pores 111, or with each other and with the peripheral surface of the aerosol-generating substrate 10. That is, the pores can communicate with the airways 11. The pores have capillary action, and can introduce aerosol into the airways 11 by capillary action. The aerosol generated by the aerosol-generating substrate 10 overflows through the pores into the airways 11, where it is collected. This can increase the availability of the active ingredient in the aerosol-generating substrate 10.

[0118] It should be noted that the airways 11 are pores or grooves in the macroscopic sense, and micropores are pores or grooves in the microscopic sense, and the cross-sectional area of ​​a single airway 11 is much larger than the cross-sectional area of ​​a micropore.

[0119] For example, the cross-sectional area of ​​a single airway 11 is at least 20 times the cross-sectional area of ​​the micropore. If the size of the micropore is roughly constant, if it is less than 20 times, the size of the airway 11 will be too small, making it difficult for the aerosol to be released into the airway 11 from the inner wall of the airway 11, increasing the user's inhalation resistance, and reducing the user's inhalation experience. Therefore, in this embodiment, if the cross-sectional area of ​​a single airway 11 is 20 times or more the cross-sectional area of ​​the micropore, the speed at which the aerosol is released from the inner wall of the airway 11 can be ensured, the inhalation resistance can be reduced, and the user's inhalation experience can be improved.

[0120] In some embodiments, the cross-sectional area of ​​a single airway 11 is 20 to 60,000 times that of the micropore. If the cross-sectional area of ​​a single airway 11 is more than 60,000 times that of the micropore, the area of ​​the airway 11 will be too large, resulting in a deterioration in the overall quality of the smoke-generating medium, a low utilization rate of the medium, and a high heating rate, making it easier for aerosols to be released into the environment from the micropores.

[0121] For example, the cross-sectional area of ​​a single airway 11 is 100 to 40,000 times the cross-sectional area of ​​a micropore.

[0122] Exemplarily, the cross-sectional area of ​​the micropores is 0.7 nm 2 (square nanometer) ~ 710μm 2 (square micrometer). For example, 1 nm 2 , 10nm 2 , 25nm 2 , 30nm 2 , 40nm 2 , 50nm 2 , 60nm 2 , 70nm 2 , 80nm 2 , 100 nm 2 , 200 nm 2 , 300 nm 2 , 400nm 2 , 500nm 2 , 600nm 2 , 700nm 2 , 800nm 2 , 900nm 2 , 1 μm 2 , 2 μm 2 , 3 μm 2 And so on.

[0123] The cross-sectional area of ​​the micropores is 0.7 nm 2 If the cross-sectional area of ​​the micropores in the medium body is less than 710 μm, the effective ingredients in the medium are less likely to volatilize into the pores 111, and the utilization rate of the medium decreases. 2 If the cross-sectional area of ​​the micropores is greater than 0.7 nm, the heat transfer within the micropores will be uneven, resulting in a poor suction experience. 2 ~710μm 2 By controlling the amount of airflow to the desired value, it is possible to improve the utilization rate of the medium and also improve the suction experience.

[0124] More preferably, the cross-sectional area of ​​the pores is 1963 nm 2 ~20μm 2 is.

[0125] Exemplarily, the hydraulic diameter of the pores is 10 nm (nanometers) to 30 μm (micrometers), such as 10 nm, 20 nm, 24 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1 μm, 2 μm, 3 μm, etc.

[0126] If the hydraulic diameter of the pores is less than 10 nm, the active ingredient inside the medium is less likely to volatilize into the pores 111, resulting in a decrease in the utilization rate of the medium. On the other hand, if the diameter range of the pores is greater than 30 μm, the heat transfer within the pores becomes uneven, resulting in a decrease in the inhalation experience. Therefore, in this embodiment, by controlling the hydraulic diameter of the pores to 0.1 nm to 30 μm, the utilization rate of the medium can be improved and the inhalation experience can also be improved.

[0127] It should be understood that the plurality of micropores may be arranged in a random manner. That is, the micropores are generated randomly. The plurality of micropores are arranged in a random manner. The term "random arrangement" refers to the absence of a predetermined rule, and for example, the position of the micropores cannot be precisely controlled artificially during the micropore formation process.

[0128] In the description of this application, a statement referring to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," or "exemplary" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the application. In the description of this application, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine different embodiments or examples described herein, and features of different embodiments or examples, unless they are mutually inconsistent.

[0129] The above is only a preferred embodiment of the present application, and does not limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should all be included in the protection scope of the present application.

Claims

1. 1. An aerosol-generating substrate, comprising: The aerosol-generating substrate has an airway that penetrates at least one end of the aerosol-generating substrate along its length, and in a cross-section perpendicular to the length of the aerosol-generating substrate, the ratio of the total cross-sectional area of ​​the airway to the cross-sectional area of ​​the aerosol-generating substrate is between 5% and 95%.

2. The ratio is between 40% and 85%.

2. The aerosol-generating substrate of claim 1.

3. the airway includes pores, the pores being provided within the aerosol-generating substrate; 2. The aerosol-generating substrate of claim 1.

4. The cross-sectional shape of the pores is circular, elliptical, sector-shaped or polygonal.

4. The aerosol-generating substrate of claim 3.

5. The number of the pores is plural, and the pores are formed in the aerosol-generating substrate in a uniformly distributed manner.

4. The aerosol-generating substrate of claim 3.

6. The number of the pores is plural, and all the pores are divided into a plurality of pore units, and the plurality of pores in the pore unit are arranged along a first direction, and the plurality of the pore units are arranged along a second direction, and the first direction and the second direction intersect; 4. The aerosol-generating substrate of claim 3.

7. The pores of the pore unit are linearly arranged along the first direction, and the pore units are linearly arranged along the second direction.

7. The aerosol-generating substrate of claim 6.

8. The plurality of pores of the pore unit are arranged circumferentially along the first direction, and the plurality of pore units are arranged so as to be sequentially fitted together along the second direction.

7. The aerosol-generating substrate of claim 6.

9. The hydraulic diameter of each pore of a single pore unit is equal, and the hydraulic diameter of each pore unit gradually increases or decreases from the inside to the outside.

9. The aerosol-generating substrate of claim 8.

10. the thickness of the partition walls between two adjacent pores in each pore unit is equal, and the spacing between each pore unit gradually increases or decreases from the inside to the outside; 9. The aerosol-generating substrate of claim 8.

11. The number of the pores is plural, and the pores are formed in the aerosol-generating substrate in a non-uniformly distributed manner.

4. The aerosol-generating substrate of claim 3.

12. The hydraulic diameters of at least some of the pores are different.

12. The aerosol-generating substrate of claim 11.

13. The thickness of the partition walls between at least some of the adjacent two pores is different.

12. The aerosol-generating substrate of claim 11.

14. the aerosol-generating substrate comprises at least one first region and at least one second region, the first region having the pores and the second region not having the pores; 4. The aerosol-generating substrate of claim 3.

15. the airway includes a groove, the groove being provided on a circumferential surface of the aerosol-generating substrate; 2. The aerosol-generating substrate of claim 1.

16. The cross-sectional shape of the groove is semicircular, semi-elliptical, or polygonal.

16. The aerosol-generating substrate of claim 15.

17. the airways extend through opposite longitudinal ends of the aerosol-generating substrate; 2. The aerosol-generating substrate of claim 1.

18. 1. An aerosol-generating product comprising: An aerosol-forming substrate according to any one of claims 1 to 17; a functional segment provided at one end of the aerosol-generating substrate along its length, the functional segment including a filter segment for filtering the aerosol; an outer layer that surrounds the outer periphery of the functional segment and the outer periphery of the aerosol-generating substrate.

19. the functional segment further comprises a temperature-reducing segment, the temperature-reducing segment being positioned between the filter segment and the aerosol-generating substrate.

19. The aerosol-generating product of claim 18.

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