Aerosol-forming substrates and aerosol-forming products

Abstract

[0009] The present application provides an aerosol-generating substrate and an aerosol-generating product, the aerosol-generating substrate having at least one airway hole therein, the airway hole penetrating at least one end along the length of the aerosol-generating substrate, and the cross-section of the airway hole perpendicular to the length of the aerosol-generating substrate has a regular polygonal cross-section. The airway hole in the aerosol-generating substrate in the present application facilitates heat transfer, thereby improving heating efficiency, and allows the aerosol-generating substrate to transfer heat relatively uniformly and stably when heated, thereby facilitating the realization of the effect of uniform inhalation each time. When the medium in the aerosol-generating substrate is heated to generate aerosol, the aerosol is collected in the airway hole and transported to the inhalation end under the action of negative suction pressure. The airway hole can reduce the inhalation resistance of the user and increase the amount of aerosol, thereby improving the user's experience.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on a Chinese patent application bearing application number 202310095317.7, filed with the China Patent Office on January 20, 2023, and claims priority to that Chinese patent application, the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION This application relates to the technical field of smoke-generating products, and in particular to aerosol-generating substrates and aerosol-generating products that generate an aerosol upon heating. [Background technology]

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

[0004] In the prior art, when a smoke-generating product is inhaled, the resistance to inhalation of the aerosol-generating substrate is high, resulting in a large variation in the amount of smoke produced with each inhalation. Summary of the Invention

[0005] In light of this, the embodiments of the present application aim to provide an aerosol-generating substrate and an aerosol-generating product that reduce the resistance to inhalation and improve uniformity with each inhalation.

[0006] An embodiment of the present application provides an aerosol-generating substrate having at least one airway hole therein, the airway hole penetrating at least one end of the aerosol-generating substrate along the length direction, and the cross-sectional shape of the airway hole in a cross section perpendicular to the length direction of the aerosol-generating substrate is a regular polygon.

[0007] In some embodiments, the airway holes are multiple and extend through opposite ends of the length of the aerosol-generating substrate, and each airway hole is identical in shape and size.

[0008] In some embodiments, the aerosol-generating substrate has an airway groove formed in its circumferential surface, the airway groove passing through opposite ends of the aerosol-generating substrate in the longitudinal direction.

[0009] In some embodiments, in a plane perpendicular to the length of the aerosol-generating substrate, the cross-sectional shape of the airway groove is the same as the local shape of the regular polygon.

[0010] In some embodiments, the airway holes are multiple and all of the airway holes are distributed on multiple trajectory lines, where each of the airway holes on a single trajectory line is linearly arranged along a first direction, and the multiple trajectory lines are arranged along a second direction, and the first direction and the second direction are not parallel.

[0011] In some embodiments, the airway holes on a single trajectory line are equally spaced apart.

[0012] In some embodiments, each of the airway holes on a single locus line is arranged circumferentially around the center of the aerosol-generating substrate, and multiple rows of airway holes are arranged concentrically along the radial direction.

[0013] In some embodiments, each of the airway holes on a single trajectory line is arranged linearly along a first direction, and multiple trajectory lines are arranged parallel to each other along a second direction, wherein the first direction and the second direction are perpendicular.

[0014] In some embodiments, the distance between two adjacent said airway openings on a single locus line is equal to the distance between two adjacent locus lines.

[0015] In some embodiments, the airway holes are distributed in a matrix, or the distribution of the airway holes is a matrix distribution in which the position of the apex angle is omitted.

[0016] In some embodiments, the regular polygon is a regular square or a regular hexagon.

[0017] In some embodiments, the regular polygon is a regular hexagon, and the airway holes on two adjacent locus lines are staggered, resulting in a honeycomb-like distribution of the airway holes.

[0018] In some embodiments, the number of airway openings is 730 or less.

[0019] In some embodiments, the hydraulic diameter of the airway stoma is between 0.1 mm and 3 mm.

[0020] In some embodiments, the aerosol-generating substrate is a particle conjugate, pores are formed between the particles of the particle conjugate, and multiple pores are connected to form micro-airways that communicate with the airway pores, and the hydraulic diameter of the pores is 10 nm to 30 μm.

[0021] In some embodiments, the maximum size of the contour of the aerosol-generating substrate in a plane perpendicular to the length of the aerosol-generating substrate is between 4 mm and 10 mm.

[0022] In some embodiments, the regular polygon has 10 or fewer sides.

[0023] An embodiment of the present application provides an aerosol-generating product, the aerosol-generating product comprising: an aerosol-generating substrate as described in any of the Examples of the present application; a functional segment provided at one end of the aerosol-generating substrate along its length, the functional segment including at least a filter segment for filtering the aerosol; and an outer coating layer that surrounds the functional segment and the circumferential exterior of the aerosol-generating substrate.

[0024] In the aerosol-generating substrate in the examples of this application, the pore walls of the airway holes constitute the inner surface of the aerosol-generating substrate, and the airway holes can increase the inner surface area of ​​the aerosol-generating substrate, facilitating heat transfer and improving heating efficiency. Furthermore, the medium in the aerosol-generating substrate is heated to generate an aerosol, which is collected in the airway holes and transported to the suction end by the action of negative suction pressure. The airway holes can reduce the user's resistance to inhalation and increase the amount of aerosol, thereby improving the user experience. Note that resistance to inhalation is positively correlated with the flow resistance of the aerosol: the smaller the flow resistance the aerosol experiences within the aerosol-generating substrate, the smaller the resistance to inhalation experienced by the user; and the greater the flow resistance the aerosol experiences within the aerosol-generating substrate, the greater the resistance to inhalation experienced by the user.

[0025] In the aerosol-generating substrate in the examples of the present application, the regular polygonal airway holes have a regular shape, making it easy to control the wall thickness of the medium wall between the hole wall of the airway hole and the outer surface of the aerosol-generating substrate; if there are multiple airway holes, it is easy to control the wall thickness of the medium wall between two adjacent airway holes, making it easy to achieve the effect of transferring heat relatively uniformly and stably when the aerosol-generating substrate receives heat, and making each suction uniform. [Brief explanation of the drawings]

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

[0027] The embodiments of the present application will be described in more detail below with reference to the drawings and examples. The following examples are intended to illustrate the present application and are not intended to limit the scope of the present application.

[0028] In describing the examples of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] An embodiment of the present application provides an aerosol-generating substrate 10 that, when heated, generates an aerosol to be inhaled by a user.

[0030] An embodiment of the present application further provides an aerosol-generating product, which, referring to Figures 1, 2, and 3, comprises a functional segment 30, an outer coating layer 20, and an aerosol-generating substrate 10 in any embodiment of the present application.

[0031] The aerosol-generating product is used in combination with an aerosol-generating device having a heating assembly, specifically, the heating assembly heats the aerosol-generating substrate 10 to volatilize the corresponding components and generate an aerosol.

[0032] It should be noted that the aerosol-generating product generates the aerosol through the aerosol-generating substrate 10, and the functional segment 30 does not generate the aerosol.

[0033] The aerosol-generating product of the embodiments of the present application may be adapted for inhalation by a heating and combustion method or by a heating and non-combustion method. In the embodiments of the present application, the aerosol-generating product 100 will be described as being adapted for inhalation by a heating and non-combustion method.

[0034] The functional segment 30 is provided at one end along the length of the aerosol-generating substrate 10. Here, the functional segment 30 includes at least a filter segment 31 for filtering the aerosol. The filter segment 31 is also called a filter tip. A user inhales the aerosol after it has been filtered by the filter segment 31 of the functional segment 30.

[0035] The outer coating layer 20 surrounds the outer circumferential surface of the functional segments 30 and the aerosol-generating substrate 10 .

[0036] The material of the outer coating layer 20 is not limited, and 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, PE, and PBAT.

[0037] In some embodiments, referring to Figure 2, the functional segment 30 includes only a filter segment 31. In other embodiments, referring to Figure 22, in addition to the filter segment 31, the functional segment 30 further includes a support segment and / or a temperature-reducing segment 32, which is disposed between the aerosol-generating substrate 10 and the filter segment 31.

[0038] Here, the temperature reduction segment 32 is used to perform a temperature reduction process on the aerosol before the filter segment 31 filters the aerosol, thereby lowering the temperature of the aerosol and thereby improving the phenomenon of the "mouth feeling hot" when the user inhales the aerosol.

[0039] Materials for the temperature reduction segment 32 include, but are not limited to, one or more combinations of polyethylene (PE), polylactic acid (also known as polylactide) (PLA), polybutyleneadipate-co-terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber materials.

[0040] The material of the filter segment 31 includes, but is not limited to, one or more combinations of polyethylene (PE), polylactic acid (also called polylactide) (PLA), polybutyleneadipate-co-terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber materials.

[0041] The temperature reduction segment 32 and the filter segment 31 may be made of the same material or different materials.

[0042] The support segments have a certain structural strength and restrict axial movement of the aerosol-generating substrate 10. Specifically, when an aerosol-generating product is inserted into a heating chamber in an aerosol-generating device or when a heating element is inserted into the aerosol-generating substrate 10, the support segments apply a counterforce to the aerosol-generating substrate 10, thereby preventing axial movement of the aerosol-generating substrate 10.

[0043] The heating assembly of the aerosol generating device may have a variety of heating modes, including, for example, central heating and peripheral heating. The central heating mode refers to a mode in which the heating assembly is inserted into the aerosol-generating product and heats the aerosol-generating product from the inside out. The peripheral heating mode refers to a mode in which the heating assembly is disposed around the aerosol-generating product and heats the aerosol-generating product from the outside in. Specific examples of these heating modes include resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, and the like, and are not particularly limited herein.

[0044] The specific components of the aerosol-generating substrate 10 are not limited herein, and by way of example, in one embodiment, the aerosol-generating substrate 10 may include a botanical component, an adjuvant component, a smoke-generating agent component, an adhesive component, etc.

[0045] In one embodiment, the botanical ingredients are one or more combinations of powders formed by grinding tobacco leaf stock, tobacco leaf fragments, tobacco stems, tobacco powder, flavor plants, etc. The botanical ingredients are used to generate an alkaloid-containing aerosol upon heating.

[0046] In one embodiment, the auxiliary component may be one or more of an inorganic filler, a lubricant, and an emulsifier. The inorganic filler may include one or more of ground calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide skeletal support for the plant component and, because it also has pores, can increase the porosity of the wall material after the plant component is molded, thereby improving the aerosol release rate.

[0047] The lubricant may include one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, palmitic acid.

[0048] Lubricants can improve particle flowability, reduce friction between particles, make the density of the entire particle distribution more uniform, reduce the pressure required for molding, and reduce mold wear.

[0049] The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol.

[0050] To some extent, the emulsifier can mitigate the loss of flavoring substances during storage, enhance the stability of flavoring substances, and improve the sensory quality of the product.

[0051] In one embodiment, the function of the smoke generant component is to generate a large amount of vapor upon heating, thereby improving the aerosol yield of the smoke-generating product. For example, the smoke generant may include 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, triacetin), monocarboxylic acids, polycarboxylic acids (e.g., lauric acid, myristic acid), or aliphatic esters of 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 phenylacetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0052] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from a natural plant, and includes one or more combinations of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan.

[0053] The adhesive 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] The aerosol-generating substrate 10 has at least one airway hole 10a therein, and referring to FIG. 2, the airway hole 10a penetrates at least one end of the aerosol-generating substrate 10 along its length.

[0055] In some embodiments, referring to Figure 19, the airway holes 10a run through the same end along the length of the aerosol-generating substrate 10, with all other ends being closed.

[0056] In some other embodiments, referring to Figure 20, some airway holes 10a penetrate one end of the aerosol-generating substrate 10 along its length, and some other airway holes 10a penetrate the other end of the aerosol-generating substrate 10 along its length.

[0057] 4 to 20, in still other embodiments, each airway hole 10a penetrates both ends of the aerosol-generating substrate 10 along its length. That is, the airway holes 10a extend in the longitudinal direction of the aerosol-generating substrate 10, allowing airflow from one end of the aerosol-generating substrate 10 through the airway holes 10a to the other end of the aerosol-generating substrate 10. Preferably, the airway holes 10a are parallel to the central axis of the aerosol-generating substrate 10.

[0058] The pore walls of the airway hole 10a constitute the inner surface of the aerosol-generating substrate 10, and the airway hole 10a increases the inner surface area of ​​the aerosol-generating substrate 10, facilitating heat transfer and improving heating efficiency. Furthermore, when the medium in the aerosol-generating substrate 10 is heated to generate aerosol, the aerosol is collected in the airway hole 10a and transported to the suction end by the action of negative suction pressure. Thus, the airway hole 10a reduces the user's resistance to inhalation and improves the user experience. Note that the resistance to inhalation is positively correlated with the flow resistance of the aerosol. The smaller the flow resistance the aerosol experiences within the aerosol-generating substrate 10, the smaller the resistance to inhalation experienced by the user. Conversely, the greater the flow resistance the aerosol experiences within the aerosol-generating substrate 10, the greater the resistance to inhalation experienced by the user.

[0059] 4 to 8, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross section of the airway hole 10a has a regular polygonal shape.

[0060] In the examples of the present application, the regular polygonal airway hole 10a has a regular shape and it is easy to control the wall thickness of the medium wall between the hole wall of the airway hole 10a and the outer surface of the aerosol-generating substrate 10. When there are multiple airway holes 10a, it is easy to control the wall thickness of the medium wall between two adjacent airway holes 10a, which makes it easy to transfer heat relatively uniformly and stably when the aerosol-generating substrate 10 receives heat, and to achieve the effect of uniform suction each time.

[0061] For example, the aerosol-generating substrate 10 is a particle aggregate, such as a reconstituted tobacco medium containing components such as a smoke-generating agent and tobacco. It can be formed into a unitary structure by extrusion, injection molding, or compression molding. Here, extrusion refers to a processing method in which a raw material mixture is fed into an extruder, and the material is heated and shaped by the action between the barrel and screw of the extruder while being extruded forward by the screw. The material then passes continuously through a die to produce finished or semi-finished products with various cross sections. The media structure formed by extrusion is rod-shaped overall. This allows the aerosol-generating substrate 10 to maintain its unitary state 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, filament-like, or particulate aerosol-generating substrates in the prior art, such as loose flakes, shedding of filament-like or particulate components, difficulty in cleaning, and non-uniformity of components.

[0062] 21, pores 10d are formed between the particles of the particle conjugate, and the pores 10d communicate with each other to form fine airways that communicate with the airway holes 10a. When the medium is heated, it releases aerosols, which are collected in the airway holes by the fine airways and transported to the suction end by the action of the negative suction pressure.

[0063] The number of airway holes 10a is not limited and may be one, two, or more than two.

[0064] Illustratively, the number of airway holes 10a is 730 or less, for example, 1, 5, 20, 50, 100, 200, 300, 500, 600, 700, 730.

[0065] For a given external size of the aerosol-generating substrate 10, there is a negative correlation between the number of airway holes 10a and the wall thickness of the adjacent airway holes 10a. The greater the number of airway holes 10a, the greater the surface area of ​​the airway holes 10a, which reduces the aerosol flow resistance in the aerosol-generating substrate 10 and improves heat transfer efficiency. The thinner the wall thickness of the adjacent airway holes 10a, the more favorable it is for heat penetration or diffusion. The thinner the wall thickness of the adjacent airway holes 10a, the lower the overall mass of the aerosol-generating substrate 10. This reduction in base material also reduces the suction quality and the overall aerosol emission. At the same time, the wall thickness of the adjacent airway holes 10a affects the overall structural strength of the aerosol-generating substrate 10; the thinner the wall thickness, the lower the structural strength of the entire structure. Therefore, it is desirable to have no more than 730 airway holes 10a.

[0066] For example, the number of air passage holes 10a is 10 to 500. Note that the fewer the number of air passage holes 10a, the simpler the process and structure and the easier the manufacturing process, the smaller the porosity, the thicker the medium wall, the larger the mass of the aerosol-generating substrate 10, and the more frequent the number of suctions. However, the heat transfer efficiency decreases, and there is a risk of the surface in contact with the heat source being overheated. On the other hand, the thinner the medium wall thickness of adjacent air passage holes 10a, the smaller the mass of the aerosol-generating substrate 10, the faster the heat transfer rate, and the fewer the number of suctions.

[0067] The greater the number of airway holes 10a, the more complex the process and structure and the greater the manufacturing difficulty; the thinner the thickness of the medium wall; the shorter the flow path of the aerosol from the fine airways to the airway holes 10a; the greater the porosity; the faster the aerosol release speed after the medium is heated; the faster the heat transfer rate; the fewer the total number of inhalations; but the more uniform the aerosol mouthfeel each time it is inhaled.

[0068] Therefore, when the number of airway holes 10a is 10 to 500, the difficulty of the manufacturing process of the aerosol-generating substrate 10 is moderate, and both an appropriate heat transfer rate and a relatively uniform inhalation sensation can be achieved.

[0069] For example, the hydraulic diameter of the airway hole 10a 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, 6 mm, etc.

[0070] In the examples of this application, hydraulic diameter refers to the ratio of four times the cross-sectional area of ​​the flow channel to the perimeter.

[0071] If the hydraulic diameter of the airway holes 10a exceeds 6 mm, the number of airway holes 10a will be reduced, making it easier for the aerosol-generating substrate 10 to burn, and the aerosol-generating substrate 10 is more likely to emit uneven aerosol during the heating process (for example, a large amount of aerosol is emitted during the first two puffs and a small amount during the subsequent puffs), which will affect the user's smoking experience.

[0072] If the hydraulic diameter of the airway hole 10a is less than 0.05 mm, the molding process becomes significantly more difficult, it becomes difficult to control the size of the airway hole 10a, and the reject rate of the aerosol-generating substrate 10 increases.

[0073] When the hydraulic diameter of the airway hole 10a is within the range of 0.05 mm to 6 mm, the flow resistance of the aerosol-generating substrate 10 is relatively small (i.e., the suction resistance is relatively small), and the aerosol flow rate is appropriate, the aerosol inside the aerosol-generating substrate 10 is easily extracted, the aerosol is released uniformly and the utilization rate is high, the aerosol is less likely to burn on the aerosol-generating substrate 10, the user experience is relatively good, and processing and manufacturing are convenient.

[0074] Preferably, the hydraulic diameter of the airway hole 10a is 0.1 mm to 3 mm (millimeters), for example, 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. Illustratively, the cross-sectional area of ​​the airway hole 10a 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 , 3mm 2 , 4mm 2 , 5mm 2 , 6mm 2 And so on.

[0075] In the examples of this application, cross-sectional area refers to the cross-sectional area of ​​the flow path.

[0076] The cross-sectional area of ​​the airway hole 10a is 30 mm 2 If the heating temperature exceeds this value, the number of airway holes 10a will be reduced, the aerosol-generating substrate 10 will be more likely to burn, and the aerosol-generating substrate 10 will be more likely to emit uneven aerosol during the heating process (for example, the amount of aerosol emitted will be large during the first two puffs and small during the subsequent puffs), which will affect the user's smoking experience.

[0077] The cross-sectional area of ​​the airway hole 10a is 0.0019 mm 2If the thickness is less than this, the molding process becomes significantly more difficult, it becomes difficult to control the size of the airway hole 10a, and the reject rate of the aerosol-generating substrate 10 increases.

[0078] The cross-sectional area of ​​the airway hole 10a 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), and the aerosol flow rate is appropriate, making it easy to extract the aerosol inside the aerosol-generating substrate 10, resulting in uniform aerosol release and high utilization rate, and the aerosol-generating substrate 10 being less likely to burn, resulting in a relatively high user experience and convenience in processing and manufacturing.

[0079] Preferably, the cross-sectional area of ​​the airway hole 10a 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 , 1.3mm 2 , 1.6mm 2 , 1.8mm 2 , 2mm 2 , 2.1mm 2 , 2.2mm 2 , 2.4mm 2 , 2.6mm 2 , 2.8mm 2 , 3mm 2 And so on.

[0080] Exemplary pore hydraulic diameters are between 10 nm (nanometers) and 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, and 3 μm.

[0081] If the hydraulic diameter of the pores is less than 10 nm, the active ingredient in the medium is less likely to volatilize to the airway pores 10a, resulting in a decrease in the utilization rate of the medium. On the other hand, if the diameter range of the pores in the medium body exceeds 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, not only the utilization rate of the medium but also the inhalation experience can be improved.

[0082] Preferably, the hydraulic diameter of the pores is 50 nm to 5 μm.

[0083] Exemplarily, the cross-sectional area of ​​the pore 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.

[0084] Pore ​​cross-sectional area is 0.7 nm 2 If it is less than 710 μm , the active ingredient inside the medium is less likely to volatilize to the airway pores 10 a, the utilization rate of the medium is reduced, and the range of the cross-sectional area of ​​the pores of the medium body is 710 μm 2 If the cross-sectional area of ​​the pores is greater than 0.7 nm, the heat transfer within the pores will be uneven, resulting in a poor inhalation experience. 2 ~710μm 2By controlling the amount of airflow, it is possible to improve both the utilization rate of the medium and the suction experience.

[0085] Preferably, the cross-sectional area of ​​the pores is 1963 nm 2 ~20μm 2 is.

[0086] In a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the contour shape of the aerosol-generating substrate 10 is not limited and may be, for example, a circle, an ellipse, a polygon, etc., and is not limited here.

[0087] 4, 5, 10 and 11, the aerosol-generating substrate 10 is cylindrical, i.e., the cross-sectional profile of the aerosol-generating substrate 10 is approximately circular. The regular shape of the cylindrical aerosol-generating substrate 10 can reduce the difficulty of the manufacturing process.

[0088] For example, the maximum size of the contour of the aerosol-generating substrate 10 in a plane perpendicular to the length of the aerosol-generating substrate is 4 mm to 10 mm, for example, 4 mm, 5 mm, 6 mm, 6.5 mm, 7 mm, 8 mm, 9 mm, or 10 mm. Such an outer diameter size of the aerosol-generating substrate 10 is set to provide the aerosol-generating substrate 10 with good structural strength while also allowing the user to easily place it in their mouth.

[0089] Here, the maximum size of the contour of the aerosol-generating substrate 10 refers to the distance between the two most distant points on the contour of the aerosol-generating substrate 10 in a plane perpendicular to the length direction of the aerosol-generating substrate. For example, if the contour of the aerosol-generating substrate 10 is cylindrical, the maximum size of the contour of the aerosol-generating substrate 10 is the diameter of the circle. If the contour of the aerosol-generating substrate 10 is elliptical, the maximum size of the contour of the aerosol-generating substrate 10 is the major axis of the ellipse.

[0090] Preferably, the maximum size of the contour of the aerosol-generating substrate 10 in a plane perpendicular to the length direction of the aerosol-generating substrate is 6 mm to 8.6 mm, for example, 6 mm, 6.5 mm, 7 mm, 7.4 mm, 7.7 mm, 8 mm, 8.6 mm, etc.

[0091] In some specific embodiments, when the maximum contour size of the aerosol-generating substrate 10 is between 4 mm and 10 mm, the hydraulic diameter of the airway pore 10a is between 0.05 mm and 6 mm.

[0092] The specific shape of the regular polygon is not limited, and examples thereof include an equilateral triangle, a regular square, a regular pentagon, a regular hexagon, a regular heptagon, a regular octagon, a regular nonagon, and a regular decagon.

[0093] For example, the number of sides of a regular polygon is 10 or less. If the number of sides exceeds 10, the side length of the regular polygon is too short, making it difficult to control the size, and the difficulty of the manufacturing process increases significantly. Therefore, controlling the number of sides of a regular polygon to 10 or less is advantageous for processing and manufacturing.

[0094] When there are multiple airway stomas 10a, the cross-sectional shapes of the airway stomas 10a may be completely identical, or some of the airway stomas 10a may have different cross-sectional shapes, or some of the airway stomas 10a may have different cross-sectional shapes. For example, in some embodiments, the cross-sectional shapes of all of the airway stomas 10a are equilateral triangles or squares, and in other embodiments, some of the airway stomas 10a are equilateral triangles and some of the airway stomas 10a are squares.

[0095] For example, there are multiple airway holes 10a, and each airway hole 10a has the same shape and size. For example, if the regular polygon is an equilateral triangle, all of the airway holes 10a are equilateral triangles, and the side lengths of all the equilateral triangles are the same. This allows each airway hole 10a of the aerosol-generating substrate 10 to be molded using the same molding die, thereby reducing manufacturing costs.

[0096] 5, 6, 7, 10, 11 to 15, and 17, in some embodiments, airway grooves 10b are formed on the circumferential surface of the aerosol-generating substrate 10, and the airway grooves 10b penetrate both ends of the aerosol-generating substrate 10 that are opposite to each other in the longitudinal direction. That is, a portion of the outer wall of the aerosol-generating substrate 10 is recessed to form the airway grooves 10b, which means that the groove-like airway grooves 10b are visible from the outer wall of the aerosol-generating substrate 10.

[0097] 3, the outer coating layer 20 on the periphery of the aerosol-generating substrate 10 can seal the airway grooves 10b on the periphery of the aerosol-generating substrate 10, allowing the airway grooves 10b to function as aerosol airflow passages, thereby improving the air inflow rate and aerosol extraction efficiency. Furthermore, when the heating assembly uses ambient heating, this heating method can also be used to adjust the overall heating rate of the aerosol-generating substrate 10, improving the user's inhalation experience.

[0098] The number of airway grooves 10b may be one or more, and is not limited here.

[0099] When multiple airway grooves 10b are provided on the outer wall of the aerosol-generating substrate 10, the cross-sectional shapes of the airway grooves 10b may be identical to each other, or some of the airway grooves 10b may have different cross-sectional shapes, such as a semicircular cross-sectional shape and at least one of the airway grooves 10b having a polygonal cross-sectional shape.

[0100] The shape of the airway groove 10b is not limited herein, and illustratively, in one embodiment, in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the airway groove 10b includes, but is not limited to, a semicircular, arc-shaped, V-shaped, rectangular or trapezoidal shape.

[0101] For example, the cross-sectional shape of the airway groove 10b is the same as the local shape of a regular polygon in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10. In the molding process, the airway groove 10b can be molded based on the same mold as the airway hole 10a, which simplifies the mold design, reduces mold costs, and reduces production costs.

[0102] In some other embodiments, referring to Figures 4, 8, 9, 16 and 18, the circumferential surface of the aerosol-generating substrate 10 may be a smooth surface without the above-mentioned airway grooves.

[0103] In one embodiment, the center line along the extension direction of at least one of the multiple airway holes 10a overlaps with the central axis along the length direction of the aerosol-generating substrate 10, i.e., the airway hole 10a is located at the center of the aerosol-generating substrate 10.

[0104] Here, the central axis along the length of the aerosol-generating substrate 10 is an imaginary reference line.

[0105] The overlapping may be such that the center line along the extension direction of the airway hole 10a completely overlaps with the central axis along the length direction of the aerosol-generating substrate 10, or may be such that the center line almost overlaps with the central axis along the length direction of the aerosol-generating substrate 10; that is, there may be a certain gap between the center line along the extension direction of the airway hole 10a and the central axis along the length direction of the aerosol-generating substrate 10, and the central axis along the length direction of the aerosol-generating substrate 10 almost passes through the airway.

[0106] During the heating and inhalation process of the airway hole 10a located on the central axis, the aerosol is collected at the medium outlet (due to the fast flow rate at the medium central hole, a negative pressure area is formed at the outlet of the medium central hole, which collects the aerosol flowing out from the holes), thereby improving the "collapsibility" of the aerosol, which in turn improves the temperature stability of the aerosol at the medium outlet (due to the fast aerosol flow rate at the central hole and the small temperature change of the aerosol, the rate of temperature change after the aerosol is collected can be reduced), further improving the consumer's inhalation experience.

[0107] It should be noted that the airway hole 10a in the embodiments of the present application may be a straight hole (i.e., the airway hole 10a extends along a straight line), or the airway hole 10a may be a curved hole (e.g., extending in a spiral shape).

[0108] In an embodiment in which there are multiple airway holes 10a, the arrangement of the airway holes 10a is not limited.

[0109] For example, all the airway holes 10a are distributed on multiple trajectories, where each airway hole 10a on a single trajectory line is linearly arranged along a first direction, and multiple trajectories are arranged along a second direction, where the first and second directions are not parallel. The first and second directions form a two-dimensional coordinate system, and the first and second directions define the planar arrangement of the airway holes 10a. In other words, the airway holes 10a are arranged regularly, which makes it easy to process each airway hole 10a according to a predetermined arrangement rule during the molding process.

[0110] For example, the airway holes 10a on a single locus line are arranged at equal intervals. Here, "equally spaced" refers to the distance between the centers of two adjacent airway holes 10a being equal. This ensures that the shapes and sizes of the media walls between two adjacent airway holes 10a are approximately the same. This improves the uniformity of the aerosol emitted by the aerosol-generating substrate 10 during the heating and inhalation process, which is beneficial for the uniformity of aerosol transmission and heat reception, and thereby improves the user's inhalation experience.

[0111] The first direction may be a straight line or a curved line, and the second direction may be a straight line or a curved line.

[0112] For example, in some embodiments, referring to Figures 8, 9, 12, 15 and 17, the airway holes 10a on a single trajectory line are arranged along a circumferential direction around the center of the aerosol-generating substrate 10, and multiple trajectory lines are arranged concentrically along a radial direction, i.e., the first direction is the circumferential direction around the center of the aerosol-generating substrate 10, and the second direction is the radial direction.

[0113] In some other embodiments, referring to Figures 4 to 7, 10, 11 to 14, 16, and 18, the airway holes 10a in each row on a single trajectory line are arranged linearly along a first direction, and multiple trajectory lines are arranged parallel to each other along a second direction, and the first and second directions are perpendicular to each other. As shown in Figure 4, the airway holes 10a in each row on a single trajectory line are arranged linearly along the first direction, and multiple trajectory lines are arranged parallel to each other along the second direction, forming multiple rows of airway holes arranged in a non-matrix pattern. As shown in Figure 10, the airway holes 10a are arranged in a matrix pattern.

[0114] 10 and 11, when the first direction and the second direction are linear directions perpendicular to each other, the distance between two adjacent airway holes 10a on a single trajectory line is equal to the distance between two adjacent trajectory lines, which results in the thickness of the medium wall between any two adjacent airway holes 10a being the same, which is advantageous for uniform heating and uniform aerosol release.

[0115] For example, in some embodiments, referring to Figures 10 and 11, the airway holes are distributed in a matrix, specifically, a matrix distribution refers to an overall N x M arrangement, where N represents the number of airway holes 10a on a single trajectory line, M represents the number of trajectory lines, and N and M may be the same or different.

[0116] For example, in some other embodiments, referring to Figures 4, 5, 6 and 13, the distribution of the airway holes 10a is a matrix-like distribution in which the position of the apex angle is omitted.

[0117] Below, 18 specific embodiments will be briefly described with reference to the drawings.

[0118] In the first embodiment Referring to FIG. 4, the cross-sectional shape of all the airway holes 10a of the aerosol-generating substrate 10 is an equilateral triangle.

[0119] 4 may be defined as the first direction and the B direction as the second direction, or alternatively, the B direction in Fig. 4 may be defined as the first direction and the A direction as the second direction. The first direction and the second direction form a two-dimensional rectangular coordinate system.

[0120] All the airway holes 10a are distributed on a plurality of locus lines, with a single locus line extending along a straight line and the plurality of locus lines being parallel to one another.

[0121] The circumferential surface of the aerosol-generating substrate 10 is a smooth, flat outer surface, ie, it does not have any airway grooves 10b.

[0122] The airway holes 10a in each row are arranged in an overlapping arrangement at equal intervals, i.e., the distance between two adjacent airway holes 10a in the first direction is equal. Here, the overlapping arrangement means that when one of the regular polygons is translated a certain distance in the first direction, it can completely overlap with another regular polygon.

[0123] Any two trajectory lines are parallel and equally spaced apart.

[0124] In this embodiment, two adjacent airway holes 10a on a single trajectory line are spaced apart at equal intervals, and this distance is defined as a first distance, and the distance between two adjacent trajectories is defined as a second distance, where the first distance and the second distance may or may not be equal.

[0125] The number of airway holes 10a on each trajectory line may or may not be equal.

[0126] The airway holes 10a on each trajectory line may be provided in alignment or may not be provided in alignment.

[0127] In the second embodiment Referring to Figures 5 and 6, in this embodiment, the aerosol-generating substrate 10 is generally the same as in the first embodiment, but the difference is that an airway groove 10b is provided on the circumferential surface of the aerosol-generating substrate 10 in this embodiment.

[0128] The airway grooves 10b are plural and are uniformly arranged along the circumferential direction of the aerosol-generating substrate 10.

[0129] The airway groove 10b is V-shaped, and the V-shape is the same as the shape of any one vertex of an equilateral triangle.

[0130] In the third embodiment Referring to FIG. 7, in this embodiment, the aerosol-generating substrate 10 is generally the same as that in the second embodiment shown in FIG. 6, except for the arrangement of the airway holes 10a.

[0131] In this embodiment, the arrangement of the equilateral triangles of the airway holes 10a in each row is not completely uniform, and the apex angles of some of the equilateral triangles are arranged 180° opposite to the apex angles of other equilateral triangles, and the two types of equilateral triangles are arranged alternately along the first direction.

[0132] According to this embodiment, the wall thickness and shape of the media wall between two adjacent airway holes 10a in a row are closer to being consistent, which results in more uniform heat transfer efficiency and promotes consistency in the suction sensation. Furthermore, when the cross-sectional size of the aerosol-generating substrate 10 and the size of the airway holes are the same, more airway holes can be arranged, which increases the utilization rate of the cross-section and the porosity.

[0133] In the third embodiment, the airway grooves 10b do not necessarily have to be provided on the circumferential surface of the aerosol-generating substrate 10.

[0134] In the fourth embodiment Referring to FIG. 8, in this embodiment, the cross-sectional shape of the airway stoma 10a is an equilateral triangle.

[0135] The first direction is the circumferential direction around the center of the aerosol-generating substrate 10, ie, the airway holes 10a in each row are arranged in a circular ring, and the second direction is the radial direction.

[0136] Here, the apex angles of the triangles of the airway holes 10a in two adjacent rows are arranged in opposite directions by 180°.

[0137] The dashed lines in FIG. 8 indicate the imaginary alignment trajectories of the airway holes 10a in each row for reference.

[0138] In this embodiment, airway grooves 10b may be provided on the circumferential surface of the aerosol-generating substrate 10.

[0139] In the fifth embodiment Referring to Figure 9, in this embodiment, the aerosol-generating substrate 10 is generally the same as that of the fourth embodiment shown in Figure 8, but the difference is that the apex angles of the equilateral triangles of the two adjacent rows of airway holes 10a in this embodiment are oriented in the same direction.

[0140] In this embodiment, airway grooves 10b may be provided on the circumferential surface of the aerosol-generating substrate 10.

[0141] In the sixth embodiment Referring to FIG. 10, in this embodiment, the cross-sectional shape of the airway stoma 10a is a regular square.

[0142] The first and second directions form a two-dimensional rectangular coordinate system, and all the airways 10a are arranged in a rectangular matrix with the same number of rows and columns.

[0143] All the airway holes 10a are divided into multiple rows, and the arrangement directions of the airway holes 10a in each row are parallel to each other.

[0144] This results in closer matching of the wall thickness and shape of the media wall between two adjacent airway holes 10a in a row, resulting in more uniform heat transfer efficiency and promoting consistency in the suction sensation.

[0145] The air duct holes 10a in each row are arranged in an overlapping arrangement at equal intervals, i.e., the distance between two adjacent air duct holes 10a in the first direction is equal. The air duct holes 10a in any two adjacent rows are arranged at equal intervals, i.e., if the centers of the air duct holes 10a in each row are assumed to be connected by a single line, any two adjacent lines are parallel to each other and are equal in distance. This ensures that the spacing between adjacent air duct holes and the thickness of the medium wall are consistent in both the first and second directions, facilitating mold design and processing and stabilizing the heat transfer rate of the medium.

[0146] A plurality of airway grooves 10b are provided on the circumferential surface of the aerosol-generating substrate 10. Specifically, in the embodiment shown in Figure 10, the airway holes 10a are distributed in a matrix pattern.

[0147] The airway grooves 10b are uniformly distributed along the circumferential surface of the aerosol-generating substrate 10.

[0148] The airway groove 10b has a semicircular shape.

[0149] In the seventh embodiment Referring to Figure 11, in this embodiment, the aerosol-generating substrate 10 is generally the same as that in the sixth embodiment shown in Figure 10, except that the airway groove 10b in this embodiment has a rectangular shape.

[0150] In the eighth embodiment Referring to FIG. 12, in this embodiment, the cross-sectional shape of the airway stoma 10a is a regular square.

[0151] The first direction is a circumferential direction around the center of the aerosol-generating substrate 10, ie, the airway holes 10a on a single locus line are arranged in a circular ring, and the second direction is a radial direction.

[0152] The dashed lines in FIG. 12 indicate the imaginary trajectories of the airway holes 10a in each row for reference.

[0153] In the ninth embodiment Referring to FIG. 13, in this embodiment, the cross-sectional shape of the airway stoma 10a is a regular pentagon.

[0154] A two-dimensional rectangular coordinate system is formed by the first direction and the second direction, and all the airways 10a are arranged in a rectangle.

[0155] All the airway holes 10a are divided into multiple rows, and the arrangement directions of the airway holes 10a in each row are parallel to each other.

[0156] In each row, the airway holes 10a are arranged in an overlapping arrangement at equal intervals, i.e., the distance between two adjacent airway holes 10a in the first direction is equal, where the overlapping arrangement means that when one pentagon is translated a certain distance in the first direction, it can completely overlap another pentagon.

[0157] Any two adjacent rows of airway holes 10a are spaced apart at equal intervals, i.e., if one line is assumed to connect the centers of the airway holes 10a in each row, any two adjacent lines are parallel to each other and are the same distance apart.

[0158] In the tenth embodiment Referring to FIG. 14, in this embodiment, the aerosol-generating substrate 10 is generally the same as that of the ninth embodiment shown in FIG. 13, except that it is arranged in a pentagonal shape.

[0159] In this embodiment, the apex angles of the airway holes 10a in two adjacent rows are arranged in opposite directions by 180°.

[0160] The dashed lines in FIG. 14 indicate the imaginary alignment trajectories of the airway holes 10a in each row for reference.

[0161] In the eleventh embodiment Referring to Figure 15, in this embodiment, the arrangement of the airway holes 10a in the aerosol-generating substrate 10 is generally the same as that of the eighth embodiment shown in Figure 12, but the difference is that the cross-sectional shape of the airway holes 10a is different.

[0162] In this embodiment, the cross-sectional shape of the airway stoma 10a is hexagonal.

[0163] A regular hexagon is an optimal topological structure for covering a two-dimensional plane, which can divide the cross section of the aerosol-generating substrate 10 more uniformly and achieve a relatively high utilization rate of the cross section.

[0164] The aerosol-generating substrate 10 is further provided on its outer peripheral surface with airway grooves 10b.

[0165] In the twelfth embodiment Referring to FIG. 16, in this embodiment, the cross-sectional shape of the airway stoma 10a is a regular hexagon.

[0166] In this embodiment, the first direction and the second direction form a two-dimensional Cartesian coordinate system, and the air duct holes 10a on two adjacent trajectories are staggered, so that all the air duct holes 10a are arranged in a honeycomb pattern, the wall thickness between adjacent air duct holes 10a is consistent, the heat transfer efficiency is more uniform, and the consistency of the suction sensation is promoted.

[0167] All the airway holes 10a are divided into multiple rows, and the arrangement directions of the airway holes 10a in each row are parallel to each other.

[0168] In the thirteenth embodiment Referring to Figure 17, in this embodiment, the arrangement of the airway hole 10a in the aerosol-generating substrate 10 is generally the same as that of the 11th embodiment shown in Figure 15, but the difference is that the cross-sectional shape of the airway hole 10a is different.

[0169] In this embodiment, the cross-sectional shape of the airway stoma 10a is a regular octagon.

[0170] The aerosol-generating substrate 10 is further provided on its circumferential surface with airway grooves 10b.

[0171] In the fourteenth embodiment Referring to Figure 18, in this embodiment, the arrangement of the airway hole 10a in the aerosol-generating substrate 10 is generally the same as that of the 12th embodiment shown in Figure 16, but the difference is that the cross-sectional shape of the airway hole 10a is different.

[0172] In this embodiment, the cross-sectional shape of the airway stoma 10a is octagonal.

[0173] In the embodiments shown in FIGS. 4 to 18, the airway grooves 10b may be provided on the circumferential surface of the aerosol-generating substrate 10, or the airway grooves 10b may not be provided.

[0174] In the examples of the present application, the structures shown in Figures 1 to 18 do not limit the relative size relationship between the airway holes 10a and the aerosol-generating substrate, and the airway holes 10a in Figures 1 to 18 are intended to more clearly show the arrangement relationship of the airway holes 10a, but do not specify a specific size.

[0175] In the description of this application, a statement referring to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this application, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0176] The above is only a preferred embodiment of the present application, and does not limit the present application, and various modifications and variations are possible for those skilled in the art. 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: An aerosol-generating substrate having at least one airway hole therein, the airway hole penetrating at least one end along the longitudinal direction of the aerosol-generating substrate, and the cross-sectional shape of the airway hole in a cross-section perpendicular to the longitudinal direction of the aerosol-generating substrate is a regular polygon.

2. the airway holes are plural and penetrate the aerosol-generating substrate at opposite ends in the length direction, and each of the airway holes has the same shape and size; 2. The aerosol-generating substrate of claim 1.

3. an airway groove is formed on the circumferential surface of the aerosol-generating substrate, the airway groove penetrating both ends of the aerosol-generating substrate that are opposite to each other in the longitudinal direction; 2. The aerosol-generating substrate of claim 1.

4. the cross-sectional shape of the airway groove in a plane perpendicular to the length of the aerosol-generating substrate is the same as the local shape of the regular polygon; 4. The aerosol-generating substrate of claim 3.

5. The airway holes are plural, and all of the airway holes are distributed on a plurality of locus lines, and each of the airway holes on a single locus line is linearly arranged along a first direction, and the plurality of locus lines are arranged along a second direction, and the first direction and the second direction are not parallel to each other.

2. The aerosol-generating substrate of claim 1.

6. The airway holes on the single locus line are equally spaced apart.

6. The aerosol-generating substrate of claim 5.

7. each of the airway holes on a single locus line is arranged along a circumferential direction surrounding the center of the aerosol-generating substrate, and a plurality of locus lines are arranged concentrically along a radial direction; 6. The aerosol-generating substrate of claim 5.

8. Each of the airway holes on a single locus line is arranged linearly along a first direction, and a plurality of locus lines are arranged parallel to each other along a second direction, and the first direction and the second direction are perpendicular to each other.

6. The aerosol-generating substrate of claim 5.

9. The distance between two adjacent airway holes on a single locus line is equal to the distance between two adjacent locus lines.

9. The aerosol-generating substrate of claim 8.

10. The airway holes are distributed in a matrix, or the distribution of the airway holes is a matrix distribution in which the positions of the apex angles are omitted.

9. The aerosol-generating substrate of claim 8.

11. The regular polygon is a regular quadrilateral or a regular hexagon.

11. An aerosol-generating substrate according to any one of claims 7 to 10.

12. the regular polygon is a regular hexagon, and the air duct holes on two adjacent locus lines are arranged to be staggered, so that the air duct holes are distributed in a honeycomb pattern; 9. The aerosol-generating substrate of claim 8.

13. The number of the airway holes is 730 or less.

2. The aerosol-generating substrate of claim 1.

14. The hydraulic diameter of the airway hole is 0.1 mm to 3 mm.

2. The aerosol-generating substrate of claim 1.

15. the aerosol-generating substrate is a particle conjugate, pores are formed between particles of the particle conjugate, a plurality of the pores are connected to form micro-airways communicating with the airway pores, and the hydraulic diameter of the pores is 10 nm to 30 μm; 2. The aerosol-generating substrate of claim 1.

16. the maximum size of the contour of the aerosol-generating substrate in a plane perpendicular to the length of the substrate is between 4 mm and 10 mm; 2. The aerosol-generating substrate of claim 1.

17. The number of sides of the regular polygon is 10 or less.

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 at least a filter segment for filtering the aerosol; an outer coating layer that surrounds the functional segment and the circumferential exterior of the aerosol-generating substrate;

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