Aerosol-forming substrates and aerosol-forming products

Abstract

The aerosol-generating substrate 10 and the aerosol-generating product 100 are provided, in which the aerosol-generating substrate 10 has a plurality of airway holes 10a therein, each of which penetrates at least one end of the aerosol-generating substrate 10 along its length and is uniformly distributed throughout the aerosol-generating substrate 10. The provision of the plurality of airway holes 10a in the aerosol-generating substrate 10 improves heating efficiency, and the uniform distribution of the airway holes 10a throughout the aerosol-generating substrate 10 allows the mass per unit volume of the aerosol-generating substrate 10 to be relatively uniform. 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 ultimately enhances the user's inhalation experience.

Description

[Technical Field]

[0001] This application is based on and claims priority to a Chinese patent application bearing application number 202310084346.3, filed with the China Patent Office on January 20, 2023, 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 type smoke-generating product includes 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, and a large amount of atomizing agent is carried by the substrate. When used, the atomizing agent is released by high-temperature heating to form an aerosol.

[0004] In the prior art, when inhaling smoke-producing products, the resistance to inhalation is high, and the amount of smoke produced varies greatly from inhalation to inhalation. Summary of the Invention

[0005] In view 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] To achieve the above object, an embodiment of the present application provides an aerosol-generating substrate having a plurality of airway holes therein, each of which penetrates at least one end of the aerosol-generating substrate along its length, and each of which is formed in the aerosol-generating substrate in a uniformly distributed manner.

[0007] In one embodiment, each of the airway holes penetrates opposite ends of the aerosol-generating substrate in the longitudinal direction, and the cross-sectional shape of the aerosol-generating substrate is circular in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate.

[0008] In one embodiment, the cross-sectional shape of the aerosol-generating substrate in a plane perpendicular to the length of the aerosol-generating substrate is elliptical, track-shaped or polygonal.

[0009] In one embodiment, the cross-sectional shape of the airway hole in a plane perpendicular to the length of the aerosol-generating substrate is circular, elliptical, track-shaped, sector-shaped or polygonal.

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

[0011] In one embodiment, the airway holes on a single trajectory line are arranged in an overlapping arrangement at equal intervals.

[0012] In one embodiment, each of the airway holes on a single trajectory line is arranged along a circumferential direction surrounding the center of the aerosol-generating substrate, and multiple trajectory lines are arranged concentrically along the radial direction of the aerosol-generating substrate.

[0013] In one embodiment, 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 a second direction, and the first direction and the second direction are perpendicular.

[0014] In one embodiment, the airway holes are distributed in a matrix, the number of the airway holes in the first direction is the same as the number of the airway holes in the second direction, the airway holes on a single trajectory line are equally spaced, and the spacing between each trajectory line is equal.

[0015] In one embodiment, the number of the airway holes on a single locus line is 2-20, and the number of the multiple locus lines is 2-20.

[0016] In one embodiment, the aerosol-generating substrate has an airway groove formed in its outer wall, the airway groove penetrating at least one end along the length of the aerosol-generating substrate.

[0017] In one embodiment, 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 airway stoma.

[0018] In one embodiment, the cross-sectional shape of the airway groove in a plane perpendicular to the length of the aerosol-generating substrate is arc-shaped, rectangular or trapezoidal.

[0019] In one embodiment, the cross-sectional area of ​​the airway opening is 0.0019 mm 2 ~30mm 2 Alternatively, the hydraulic diameter of the airway opening is 0.05 mm to 6 mm.

[0020] In one embodiment, the wall thickness of the partition walls of the adjacent airway holes is 10 μm to 800 μm.

[0021] In one embodiment, a center line along the extension direction of at least one of the plurality of airway holes overlaps with a center axis along the length direction of the aerosol-generating substrate.

[0022] Embodiments of the present application further provide an aerosol-generating product, the aerosol-generating product comprising: the aerosol-generating substrate; 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 exterior layer that surrounds the functional segment and the aerosol-generating substrate in the circumferential direction.

[0023] In one embodiment, the functional segment further comprises a temperature-reducing segment, the temperature-reducing segment being located between the filter segment and the aerosol-generating substrate.

[0024] The present application provides an aerosol-generating substrate and an aerosol-generating product, each having a plurality of airway holes formed inside the aerosol-generating substrate, each of which penetrates at least one end of the substrate along its length and is uniformly distributed throughout the substrate. When the aerosol-generating substrate is heated and atomized, the aerosol-generating substrate receives heat and releases an aerosol. The aerosol escapes through gaps or micropores in the partitions between the airway holes, is collected in the airway holes, and is transported to the suction end by the action of negative suction pressure. In other words, the provision of a plurality of airway holes increases the surface area of ​​the aerosol-generating substrate (the side walls of the airway holes correspond to part of the surface of the aerosol-generating substrate). This allows heat from the aerosol-generating substrate to enter the substrate from its outer surface, improving heating efficiency compared to related art structures that use direct conduction within the aerosol-generating substrate. Furthermore, since the airway holes are uniformly distributed in the aerosol-generating substrate, the mass per unit volume of the aerosol-generating substrate can be made relatively uniform, which improves the uniformity of the aerosol emitted from the aerosol-generating substrate during the heating and inhalation process, which is advantageous for the uniformity of aerosol transmission and heat reception, and ultimately improves the user's inhalation experience. In other words, the aerosol-generating substrate of the present embodiment can improve the user's experience. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a structural schematic diagram of a first aerosol-generating product according to an embodiment of the present application. [Figure 2] 2 is a cross-sectional view of the 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 an embodiment of the present application. [Figure 4] 1 is a schematic diagram of the structure of a first type of aerosol-generating substrate according to an embodiment of the present application. [Figure 5] FIG. 1 is a schematic diagram of the structure of a second type of aerosol-generating substrate according to an embodiment of the present application. [Figure 6] FIG. 6 is a cross-sectional view of the aerosol-generating substrate shown in FIG. 5. [Figure 7] FIG. 1 is a schematic diagram of the structure of a third type of aerosol-generating substrate according to an embodiment of the present application. [Figure 8] FIG. 1 is a schematic diagram of the structure of a fourth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 9] FIG. 1 is a schematic diagram of the structure of a fifth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 10] FIG. 1 is a schematic diagram of the structure of a sixth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 11] FIG. 1 is a schematic diagram of the structure of a seventh type of aerosol-generating substrate according to an embodiment of the present application. [Figure 12] FIG. 1 is a schematic diagram of the structure of an eighth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 13] FIG. 1 is a schematic diagram of the structure of the ninth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 14] FIG. 1 is a schematic diagram of the structure of the tenth type of aerosol-generating substrate according to an embodiment of the present application. [Figure 15] FIG. 11 is a schematic diagram of the structure of the eleventh type of aerosol-generating substrate in the examples of the present application. [Figure 16] FIG. 1 is a schematic diagram of the structure of the 12th type of aerosol-generating substrate in the examples of the present application. [Figure 17] FIG. 1 is a schematic diagram of the structure of the thirteenth type of aerosol-generating substrate in the examples of the present application. [Figure 18] FIG. 1 is a schematic diagram of the structure of the 14th type of aerosol-generating substrate in the examples of the present application. [Figure 19] FIG. 1 is a schematic diagram of the structure of the 15th type of aerosol-generating substrate in the examples of the present application. [Figure 20] FIG. 1 is a schematic diagram of the structure of the 16th type of aerosol-generating substrate in the examples of the present application. [Figure 21]FIG. 2 is a cross-sectional view of a third aerosol-generating product according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0026] It should be noted that, unless contradictory, 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.

[0027] One embodiment of the present application provides an aerosol-generating product. Referring to Figures 1 to 3, the aerosol-generating product 100 includes a functional segment 20, an exterior layer 30, and an aerosol-generating substrate 10. The functional segment 20 is provided at one end along the length of the aerosol-generating substrate 10, and includes at least a filter segment for filtering the aerosol. The filter segment is also called a filter tip.

[0028] The outer layer 30 surrounds the functional segment 20 and the aerosol-generating substrate 10 on their outer periphery.

[0029] The aerosol-generating product 100 is used in combination with an aerosol-generating device having a heating assembly, specifically, the heating assembly heats and atomizes the aerosol-generating substrate 10 to generate an aerosol, and the user inhales the aerosol after it has been filtered by the filter segment of the functional segment 20.

[0030] It should be noted that the aerosol-generating product 100 generates the aerosol through the aerosol-generating substrate 10, and the functional segment 20 does not generate the aerosol.

[0031] The aerosol-generating product of the present embodiment may be adapted for inhalation by a heating and combustion method or by a heating and non-combustion method. In the present embodiment, the aerosol-generating product 100 will be described as being adapted for inhalation by a heating and non-combustion method.

[0032] There are various heating methods for the heating assembly, and exemplary heating methods include central heating, peripheral heating, and bottom heating. The central heating method refers to a method in which a heating assembly is inserted into the aerosol-generating product 100 and heats the aerosol-generating product 100 by toasting it from the inside out. The peripheral heating method refers to a method in which a heating assembly is placed around the outside of the aerosol-generating product 100 and heats it by toasting it from the outside in. The bottom heating method refers to a method in which the heating assembly is used to first heat the air, and then the hot air heats the aerosol-generating product 100 from below up. Specific examples of these heating methods include resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc., and are not particularly limited herein.

[0033] The functional segment 20 may be provided with only a filter segment 21 as shown in Figure 2, or may be provided with a filter segment 21 and a temperature-reducing segment 22 as shown in Figure 21. In the case of a functional segment 20 provided with a temperature-reducing segment 22, the temperature-reducing segment 22 is provided between the filter segment 21 and the smoke generating medium structure 10 and is used to reduce the temperature of the aerosol before the filter segment 21 filters the aerosol.

[0034] Here, the temperature-reducing segment is used to reduce the temperature of the aerosol before the filter segment filters it, thereby improving the phenomenon of the user's mouth feeling hot when inhaling the aerosol.

[0035] In some embodiments, the functional segment 20 may further comprise a support segment, which has a certain structural strength and restricts axial movement of the aerosol-generating substrate 10. Specifically, when the aerosol-generating product 100 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 segment applies a counterforce to the aerosol-generating substrate 10, thereby preventing axial movement of the aerosol-generating substrate 10.

[0036] Another embodiment of the present application further provides an aerosol-generating substrate 10, which is used in the aerosol-generating product 100 described in the embodiment of the present application. Referring to Figures 1 to 21, the aerosol-generating substrate 10 has a plurality of airway holes 10a therein, each of which penetrates at least one end of the aerosol-generating substrate 10 along its length, i.e., the airway holes 10a extend in the longitudinal direction of the aerosol-generating substrate 10, and the airway holes 10a are uniformly distributed in the aerosol-generating substrate 10.

[0037] Note that the expression "uniformly distributed" of the airway holes 10a includes a matrix-like or concentric distribution of the airway holes 10a, meaning that the arrangement of the airway holes 10a is uniform. It should be understood that the airway holes 10a may be non-uniform within the cross-section of the aerosol-generating substrate 10. That is, although the airway holes 10a are uniformly distributed, they do not necessarily divide the entire aerosol-generating substrate 10 uniformly. For example, if the cross-section of the aerosol-generating substrate 10 is circular, the airway holes 10a distributed in a matrix are not uniformly distributed within the circular cross-section. The pore walls of the airway holes 10a constitute the surface of the aerosol-generating substrate 10, and the airway holes 10a can increase the surface area of ​​the aerosol-generating substrate 10, facilitating heat transfer and improving heating efficiency. Furthermore, the aerosol flows out of the micropores, is collected in the airway hole 10a, and is transported to the suction end by the action of the negative suction pressure, thereby reducing the inhalation resistance of the user and improving the user's experience.

[0038] The specific structure of the aerosol-generating substrate 10 is not limited thereto, but for example, in one embodiment, the aerosol-generating substrate 10 may be made of an atomizing medium itself, such as a tobacco-scented flavoring medium. In other embodiments, the aerosol-generating substrate 10 may include a base and the atomizing medium provided on the base. The base may be, for example, high-temperature resistant carbon fiber. The provision of the base not only improves the strength of the aerosol-generating substrate 10, but also enables it to withstand relatively high temperatures without generating unpleasant odors.

[0039] Here, the aerosol-generating substrate 10 is, for example, a reconstituted tobacco medium containing ingredients such as smoke generating agents and tobacco, and is manufactured by an extrusion process to have an integral structure. As a result, the aerosol-generating substrate 10 remains an integral medium even after it is heated and inhaled, or after it stops receiving heat, and does not collapse and fall off. This solves the problems of the prior art where the filamentous or particulate aerosol-generating substrate 10 would fall off or be difficult to clean.

[0040] The aerosol-generating substrate 10 may be formed by a process such as compression or extrusion.

[0041] Note that uniform distribution of the airway holes 10a in the aerosol-generating substrate 10 includes at least the airway holes 10a having the same hole diameter and the same wall thickness of the partitions of adjacent airway holes 10a.

[0042] By providing the airway holes 10a inside the aerosol-generating substrate 10, the surface area of ​​the aerosol-generating substrate 10 is increased, the heating efficiency is improved, and the user's inhalation experience is enhanced.

[0043] The aerosol-generating substrate provided in the present embodiment has multiple airway holes 10a inside, each of which penetrates both ends of the aerosol-generating substrate 10 along its length and is uniformly distributed throughout the substrate. When the aerosol-generating substrate 10 is heated and atomized, the aerosol-generating substrate 10 receives heat and releases aerosol. The aerosol escapes through gaps or micropores in the partitions between the airway holes 10a, collects in the airway holes 10a, and is transported to the suction end by the action of negative suction pressure. In other words, the provision of multiple airway holes 10a increases the surface area of ​​the aerosol-generating substrate 10 (the side walls of the airway holes 10a correspond to part of the surface of the aerosol-generating substrate 10). This allows heat from the aerosol-generating substrate 10 to enter the substrate from its outer surface, improving heating efficiency compared to the related art structure in which heat is directly conducted inside the substrate 10. Furthermore, since the airway holes 10a are uniformly distributed in the aerosol-generating substrate 10, the mass per unit volume of the aerosol-generating substrate 10 can be made relatively uniform, which improves the uniformity of the aerosol emitted from the aerosol-generating substrate 10 during the heated inhalation process, which is advantageous for the uniformity of aerosol transmission and heat reception, and ultimately improves the user's inhalation experience. In other words, the aerosol-generating substrate of the present embodiment can improve the user's experience.

[0044] The armor layer 30 wraps around the outer periphery of the functional segment 20 and the aerosol-generating substrate 10 .

[0045] The material of the exterior layer 30 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.

[0046] In some embodiments, referring to Figure 2, the functional segment 20 includes only the filter segment 21. In other embodiments, referring to Figure 21, in addition to the filter segment 21, the functional segment 20 further includes a support segment (not shown) and / or a temperature-reducing segment 22, which are disposed between the aerosol-generating substrate 10 and the filter segment 21.

[0047] Here, the temperature-reducing segment 22 is used to reduce the temperature of the aerosol before the filter segment 21 filters the aerosol, thereby reducing the temperature of the aerosol and improving the phenomenon of the user's mouth feeling hot when inhaling the aerosol.

[0048] Materials for the temperature-reducing segment 22 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.

[0049] The filter segment materials may 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.

[0050] The materials of the temperature-reducing segment 22 and the filter segment may be the same or different.

[0051] The support segments have a certain structural strength and restrict axial movement of the aerosol-generating substrate 10. Specifically, when the aerosol-generating product 100 is inserted into the heating chamber 200a in the aerosol-generating device 200, or when a heating element is inserted into the aerosol-generating substrate 10, the support segments apply a reaction force to the aerosol-generating substrate 10, thereby preventing the aerosol-generating substrate 10 from moving in the axial direction.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] In one embodiment, 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. 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).

[0058] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from natural plants, such as 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. It also improves the water resistance of the aerosol-generating substrate 10, is harmless to the human body, and has certain health benefits.

[0059] In some embodiments, referring to Figure 16, the airway holes 10a run through the same end along the length of the aerosol-generating substrate 10, with all other ends being closed.

[0060] 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.

[0061] 6 to 14, in some other embodiments, each airway hole 10a penetrates both ends along the length of the aerosol-generating substrate 10. It can be understood that having the airway holes 10a penetrate both ends along the length of the aerosol-generating substrate 10 is more advantageous in reducing the resistance to inhalation for the user than having the airway holes 10a penetrate only one end along the length of the aerosol-generating substrate 10.

[0062] 4 to 20, the aerosol-generating substrate 10 is cylindrical, i.e., the cross-sectional outline of the aerosol-generating substrate 10 is approximately circular in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10. The regular shape of the cylindrical aerosol-generating substrate 10 reduces the difficulty of the manufacturing process. In one embodiment, as shown in FIGS. 8 to 14, an airway groove 10b is formed in the outer wall of the aerosol-generating substrate 10, and the airway groove 10b penetrates at least one end of the aerosol-generating substrate 10 along the longitudinal direction. That is, a portion of the outer wall of the aerosol-generating substrate 10 is recessed to form the airway groove 10b, which corresponds to the groove-shaped airway groove 10b being visible from the outer wall of the aerosol-generating substrate 10.

[0063] The phrase "the airway groove 10b penetrates at least one end along the length of the aerosol-generating substrate 10" means that the airway groove 10b may penetrate both opposite ends along the length of the aerosol-generating substrate 10, or one end of the airway groove 10b may penetrate an end face along the length of the aerosol-generating substrate 10 and the other end of the airway groove 10b may be blind. It can be understood that, compared with the case where the airway hole 10a penetrates only one end along the length of the aerosol-generating substrate 10, the case where the airway hole 10a penetrates both ends along the length of the aerosol-generating substrate 10 is advantageous in reducing the inhalation resistance of the user.

[0064] 3, the outer layer 30 on the outer periphery of the aerosol-generating substrate 10 can seal the airway grooves 10b on the outer 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 adjust the overall heating rate of the aerosol-generating substrate 10, improving the user's inhalation experience.

[0065] Here, the number of airway grooves 10b is not limited here, but for example, the number of airway grooves 10b may be one or more.

[0066] Although the shape of the aerosol-generating substrate 10 is not limited herein, for example, in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the aerosol-generating substrate 10 includes, but is not limited to, a circle, an ellipse, a track, a sector, or a polygon.

[0067] Here, the cross-sectional shape of the aerosol-generating substrate 10 refers to the cross-sectional shape of the aerosol-generating substrate 10 cut along a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10 .

[0068] Here, the track shape refers to a shape similar to a running track, and is formed by two semicircles and two parallel straight lines connected alternately.

[0069] Although the shape of the airway hole 10a is not limited herein, for example, in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the airway hole 10a includes, but is not limited to, a circle, an ellipse, a track shape or a polygon, where the polygon includes a regular polygon or an irregular polygon.

[0070] Here, the cross-sectional shape of the airway opening 10a refers to the cross-sectional shape of the airway opening 10a cut along a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10.

[0071] Although the shape of the airway groove 10b is not limited herein, for example, 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.

[0072] In some other embodiments, the cross-sectional shape of the airway groove 10b in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is the same as the local shape of the airway hole 10a, i.e., the cross-sectional shape of the airway groove 10b is the same as the local shape of the airway hole 10a, for example, the cross-sectional shape of the airway hole 10a is circular and the cross-sectional shape of the airway groove 10b is semicircular. During the molding process, the airway groove 10b can be molded using the same mold as the airway hole 10a, which simplifies the mold design, reduces mold costs, and reduces production costs.

[0073] Furthermore, the cross-sectional shape of each airway hole 10a may be completely identical, or at least two of the airway holes 10a may have different cross-sectional shapes, for example, at least one airway hole 10a may have a circular cross-sectional shape and at least one airway hole 10a may have a polygonal cross-sectional shape.

[0074] When multiple airway grooves 10b are provided on the outer wall of the aerosol-generating substrate 10, the cross-sectional shape of each airway groove 10b may be completely identical, or at least two of the airway grooves 10b may have different cross-sectional shapes, for example, at least one airway groove 10b may have a semicircular cross-sectional shape and at least one airway groove 10b may have a polygonal cross-sectional shape.

[0075] By providing airway holes 10a inside the aerosol-generating substrate 10, the internal surface area of ​​the aerosol-generating substrate 10 can be increased and heating efficiency can be improved. At the same time, the aerosol can flow out through the gaps or micropores in the partitions between each airway hole 10a, be collected in the evenly distributed airway holes 10a, and be transported to the suction end by the action of negative suction pressure. The even distribution of the airway holes 10a is advantageous for the uniformity of aerosol transmission and uniformity of heat reception, and has the effect of improving the user's inhalation experience.

[0076] The provision of airway grooves 10b on the outer wall of the aerosol-generating substrate 10 increases the external surface area of ​​the aerosol-generating substrate 10, improving heating efficiency and enhancing the user's inhalation experience, while also benefiting the extraction of active ingredients. Furthermore, when the heating assembly employs ambient heating, this heating method can also be used to adjust the overall heating rate of the aerosol-generating substrate 10, further improving the user's experience. At the same time, aerosol can flow out of gaps or pores in the aerosol-generating substrate 10, be collected in the airway grooves 10b, and be transported to the suction end by the action of negative suction pressure. The provision of airway grooves 10b is beneficial to the transmission of aerosol, further improving the user's experience.

[0077] By providing airway holes 10a inside the aerosol-generating substrate 10 and airway grooves 10b on the outer wall of the aerosol-generating substrate 10, the inner and outer surface areas of the aerosol-generating substrate 10 can be increased simultaneously, and better effects can be achieved compared to when airway holes 10a are provided only inside the aerosol-generating substrate 10.

[0078] The arrangement of the airway holes 10a in the aerosol-generating substrate 10 in a non-uniform manner is not limited.

[0079] For example, all the airway holes 10a are distributed along multiple trajectories, where each airway hole 10a on a single trajectory line is linearly arranged along a first direction Z1, and multiple trajectories are arranged along a second direction Z2, where the first direction Z1 and the second direction Z2 are not parallel, i.e., the rows of airways are not linearly arranged. The first direction Z1 and the second direction Z2 form a planar two-dimensional coordinate system, and the first direction Z1 and the second direction Z2 can define the arrangement of the airway holes 10a. In other words, the airway holes 10a have a specific arrangement rule, which makes it easy to process each airway hole 10a according to the predetermined arrangement rule during the molding process.

[0080] 4 to 14, the airway holes 10a on a single locus are arranged at equal intervals. Here, "equally spaced" refers to the equal distance between the centers of two adjacent airway holes 10a. This allows the partitions between two adjacent airway holes 10a to have substantially the same shape and size. This improves the uniformity of the aerosol emitted by the aerosol-generating substrate 10 during the heated inhalation process, which is advantageous for the uniformity of aerosol transmission and heat reception, and ultimately improves the user's inhalation experience. In other words, the aerosol-generating substrate of the present embodiment can improve the user's inhalation experience.

[0081] The first direction Z1 may be a straight line or a curved line, and the second direction Z2 may be a straight line or a curved line.

[0082] For example, each airway hole 10a on a single trajectory line can be arranged linearly along a first direction Z1, and multiple trajectory lines can be arranged along a second direction Z2 perpendicular to the first direction Z1. As shown in Figures 14, 15, and 17, each airway hole 10a on a single trajectory line can be arranged linearly along the first direction Z1, and multiple trajectory lines can be arranged parallel to each other along the second direction Z2, thereby forming multiple rows of airway holes arranged in a non-matrix pattern. As shown in Figures 5, 7, and 10-13, the airway holes 10a are arranged in a matrix pattern.

[0083] For example, when the first direction Z1 and the second direction Z2 are mutually perpendicular linear directions, as shown in Figures 5, 7, and 10 to 13, the airway holes are distributed in a matrix, with each airway hole on a single trajectory line being equally spaced and the distance between each trajectory line being equal, i.e., the distance between two adjacent airway holes 10a on a single trajectory line is equal to the distance between two adjacent trajectories. This ensures that the thickness of the medium wall between any two adjacent airway holes 10a is the same, which is advantageous for uniform heating and uniform aerosol release.

[0084] For example, in some embodiments, referring to Figures 5, 7, and 10 to 13, the airway holes are distributed in a matrix, specifically, a matrix distribution refers to an N x M overall 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 (the number of airway holes in the first direction Z1 and the second direction Z2 is the same) or different (the number of airway holes in the first direction Z1 and the second direction Z2 is different).

[0085] For example, in some other embodiments, referring to FIG. 17, the distribution of the airway holes 10a is a distribution in which corners are omitted based on a matrix distribution.

[0086] In one embodiment, the airway openings 10a on a single trajectory line are arranged in an overlapping arrangement with equal intervals, i.e., the airways in the same row are completely identical, i.e., the airway openings 10a in each row are arranged in an overlapping arrangement with equal intervals. Note that there are multiple ways in which the airway openings 10a on a single trajectory line can be arranged in an overlapping arrangement with equal intervals. For example, in some embodiments, the airway openings 10a on a single trajectory line are arranged in an overlapping arrangement with equal intervals along a straight line. In other embodiments, the single trajectory line is arranged in a circumferential direction around the center of the aerosol-generating substrate 10.

[0087] In one specific embodiment, all the airway holes 10a are distributed in a matrix. Figures 5 and 6 show a matrix of 3 rows and 3 columns, with each airway hole 10a having the same shape and size, and the spacing between the airway holes 10a in adjacent rows or columns being the same. In this embodiment, the cylindrical airway holes 10a are uniformly distributed in a matrix, which has the advantage that the spacing between two adjacent holes is equal, which allows the wall thickness of the partitions of adjacent airway holes 10a to be the same. The aerosol can be evenly released into the annular airway holes 10a through the gaps or micropores in the partitions of adjacent airway holes 10a, and the aerosol release is uniform and stable. Furthermore, in this embodiment, an airway hole 10a is provided at the center of the aerosol-generating substrate 10. According to the laws of fluid mechanics, the central flow velocity is faster than the peripheral flow velocity during negative pressure suction, so the design of the central airway hole 10a can further enhance the uniform release of aerosol from the center to the periphery and stabilize the uniform release of aerosol throughout the aerosol-generating substrate 10. Covering the outer periphery of the aerosol-generating substrate 10 with paper or other blocking material can further close the airway grooves 10b around the periphery of the medium, thereby increasing the amount of air inflow and the efficiency of aerosol extraction.

[0088] In another specific embodiment, all the airway holes 10a are distributed in a matrix. Figures 7, 12, and 13 show a 4-by-4 matrix, with each airway hole 10a having the same shape and size and the same spacing between the airway holes 10a in adjacent rows or columns. In this embodiment, the cylindrical airway holes 10a are uniformly distributed in a matrix, which has the advantage that the spacing between adjacent holes is equal, allowing the wall thickness of adjacent airway holes 10a to be the same. The aerosol can be evenly released into the annular airway holes 10a through the gaps or micropores in the walls of adjacent airway holes 10a, and the aerosol release is uniform and stable. In this embodiment, no airway hole 10a is provided in the center of the aerosol-generating substrate 10.

[0089] It will be appreciated that in other embodiments, the number of rows and columns in the matrix may be different, for example, 2 rows and 3 columns. In other embodiments, the cross-sectional shape of the airway stoma 10a may be an equilateral triangle, a regular square, a regular hexagon, or other types of triangles or polygons.

[0090] 18 and 19, in some other embodiments, the passage 10c includes a plurality of airway holes 10a, which are provided inside the aerosol-generating substrate 10, and all of the airway holes 10a are arranged in a row, i.e., the airway holes 10a are linearly arranged along a first direction Z1, which may be a straight line or a curved line, i.e., the airway holes 10a are regularly arranged, which makes it easy to process the airway holes 10a according to a predetermined arrangement rule during the molding process. Illustratively, the airway holes 10a are arranged in a circumferential direction around the center of the aerosol-generating substrate 10.

[0091] 18 and 19, the airway holes 10a in this embodiment are fan-shaped. The airway holes 10a are uniformly arranged around the circumference of the heating element 20. For example, when there are three airway holes 10a, the circular angle corresponding to each airway hole 10a is 120°; when there are four airway holes 10a, the circular angle corresponding to each airway hole 10a is 90°; and when there are six airway holes 10a, the circular angle corresponding to each airway hole 10a is 60°.

[0092] In this embodiment, there is a radial partition between two adjacent airway holes 10a, and the wall thickness at any point in the single radial partition may be the same or different.

[0093] In this embodiment, the fan-shaped airway hole 10a can effectively increase the flow rate of fresh air in the airway hole 10a, reduce the proportion of aerosol in the airflow, and lower the temperature of the aerosol after extraction. This reduces the waste of aerosol when the user inhales intermittently, thereby improving the aerosol utilization rate.

[0094] In one embodiment, the number of airway holes 10a on a single trajectory line is 2-20, and the number of rows of the multiple trajectory lines is 2-20.

[0095] Research has found that when the number of airway holes 10a on a single trajectory line or the number of rows of multiple trajectory lines exceeds 20, the mass of the aerosol-generating substrate 10 becomes relatively low, the aerosol release time becomes short, and the aerosol-generating substrate 10 is prone to burning. Furthermore, the aerosol-generating substrate 10 is prone to uneven aerosol release during the heating process (e.g., a large amount of aerosol is released during the first two puffs and a small amount of aerosol is released during the subsequent puffs), which affects the user's smoking experience.

[0096] On the other hand, if the number of airway holes 10a on a single trajectory line or the number of rows of multiple trajectory lines is set within the range of 2 to 20, 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, and the user's experience is relatively good.

[0097] For example, referring to Figures 4, 8 and 9, each airway hole 10a on a single trajectory line can be arranged along a circumferential direction surrounding the center of the aerosol-generating substrate 10, and multiple trajectory lines can be arranged concentrically along the radial direction of the aerosol-generating substrate 10.

[0098] The circumferential direction surrounding the center of the aerosol-generating substrate 10 corresponds to the first direction Z1, and the radial direction of the aerosol-generating substrate 10 corresponds to the second direction Z2; that is, the multiple airway holes 10a can be arranged in a ring shape.

[0099] In one specific embodiment, all the airway holes 10a are distributed in multiple circular rings. Figure 4 shows three circular rings. The cross-sectional areas of the airway holes 10a are circular, and the airway holes 10a in two adjacent rings are alternately distributed, i.e., each hole in one ring is located between two holes in the other ring. In this embodiment, the circular distribution of the cylindrical holes has the advantage that the spacing between adjacent holes is equal, and the number of holes in the adjacent outer ring and the number of holes in the adjacent inner ring are arranged according to a certain complementary rule. This allows the wall thickness of the partitions of adjacent airway holes 10a to be the same, and the aerosol can be evenly released into the circular airway holes 10a through the gaps or micropores in the partitions of adjacent airway holes 10a, resulting in uniform and stable aerosol release.

[0100] Continuing to refer to Figures 4 to 14, the airway holes 10a on the multiple trajectory lines are uniformly distributed, i.e., all airway holes 10a are the same, the airway holes 10a on a single trajectory line are arranged at equal intervals, and the multiple trajectory lines are also arranged at equal intervals (not taking into account the small area near the outer wall of the aerosol-generating substrate 10 shown in Figures 4 to 14 where no airway holes 10a are provided).

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] On the other hand, 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-generating substrate 10 is less likely to burn, the user experience is relatively good, and processing and manufacturing are easy.

[0106] 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.

[0107] 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.

[0108] In the examples of this application, the cross-sectional area refers to the cross-sectional area of ​​the flow path.

[0109] 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.

[0110] The cross-sectional area of ​​the airway hole 10a is 0.0019 mm 2 If it is less than this, the difficulty of the molding process will increase significantly, it will be difficult to control the size of the airway hole 10a, and the reject rate of the aerosol-generating substrate 10 will increase.

[0111] 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 better user experience and convenience in processing and manufacturing.

[0112] 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.

[0113] In one embodiment, the wall thickness of the partitions of the adjacent airway holes 10a is 10 μm to 800 μm.

[0114] For a given external size of the aerosol-generating substrate 10, the wall thickness of the partition walls of adjacent airway holes 10a is positively correlated with the aerosol emission rate of the aerosol-generating substrate 10, while the number and diameter of the airway holes 10a are negatively correlated. The greater the number of airway holes 10a and the larger their diameter, the greater the specific surface area of ​​the cross-sectional area of ​​the airway holes 10a, and the lower the aerosol flow resistance of the aerosol-generating substrate 10. On the other hand, the thinner the wall thickness of the partition walls of adjacent airway holes 10a, the more favorable it is for heat penetration or diffusion, increasing the heat transfer efficiency. Furthermore, the thinner the wall thickness of the partition walls of adjacent airway holes 10a, the lower the mass of the aerosol-generating substrate 10. The reduction in the base material results in a relative decrease in the suction quality and aerosol emission rate. At the same time, the wall thickness of the partition walls of adjacent airway holes 10a affects the overall structural strength of the aerosol-generating substrate 10. Therefore, the wall thickness of the partition walls of adjacent airway holes 10a must be set in accordance with the aerosol emission amount, heat transfer, and overall structural strength of the aerosol-generating substrate 10. That is, when the wall thickness of the partition walls of adjacent airway holes 10a is 10 μm to 800 μm, 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 emission is uniform and the utilization rate is high, and the aerosol is less likely to burn on the aerosol-generating substrate 10, resulting in a relatively good user experience.

[0115] The thicker the wall thickness of the partition walls of adjacent airway holes 10a, the greater the mass of the aerosol-generating substrate 10 and the greater the number of puffs, but the lower the heat transfer efficiency and the risk of overheating at the contact surface with the heat source. On the other hand, the thinner the wall thickness of the partition walls of adjacent airway holes 10a, the smaller the mass of the aerosol-generating substrate 10, the faster the heat transfer rate and the fewer puffs. Furthermore, by designing different wall thicknesses, it is possible to adjust and control the suction resistance of the consumables, the release rate of the active ingredient in the aerosol-generating substrate 10, the heat transfer rate of the aerosol-generating substrate 10, and the uniformity of suction. For example, if the wall thickness of the partition walls of adjacent airway holes 10a is less than 10 μm, the mass of the aerosol-generating substrate 10 will be small, the aerosol release amount and aerosol release time will be short, and the aerosol-generating substrate 10 will have poor support, resulting in a low yield rate in the processing of the aerosol-generating substrate 10. If the wall thickness of the partition of the adjacent airway hole 10a exceeds 800 μm, the mass of the aerosol-generating substrate 10 will be large, which will be unfavorable for the release of aerosol, and the suction resistance of the entire aerosol-generating substrate 10 will be large, resulting in a poor user experience.

[0116] Preferably, the wall thickness of the partition walls of adjacent airway holes 10a is 10 μm to 400 μm.

[0117] In one embodiment, referring to Figures 8 and 9, 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.

[0118] The central axis along the length of the aerosol-generating substrate 10 is an imaginary reference line.

[0119] Here, overlapping means that 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 almost overlap; in other words, there may be a certain deviation 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 central airway hole 10a.

[0120] The airway hole 10a located on the central axis collects aerosol at the medium outlet during the heated inhalation process (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 outer peripheral holes), improving the "collection" of the aerosol; furthermore, this arrangement also improves the stability of the aerosol temperature 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), ultimately improving the consumer's inhalation experience.

[0121] In some other embodiments, all of the airway holes 10a may be in a cross-shaped distribution as shown in FIG. 19, a star-shaped distribution as shown in FIG. 18, a diamond-shaped grid distribution as shown in FIG. 15, or the like.

[0122] 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.

[0123] 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: An aerosol-generating substrate having a plurality of airway holes therein, each of which penetrates at least one end of the aerosol-generating substrate along its length, and each of which is formed in the aerosol-generating substrate in a uniformly distributed manner.

2. each of the airway holes penetrates each of the opposite ends of the aerosol-generating substrate in the longitudinal direction, and the aerosol-generating substrate has a circular cross-sectional shape in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate; 2. The aerosol-generating substrate of claim 1.

3. All 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.

4. The airway holes on a single trajectory line are arranged in an overlapping manner at equal intervals.

4. The aerosol-generating substrate of claim 3.

5. the airway holes on a single locus line are arranged in a circumferential direction surrounding the center of the aerosol-generating substrate, and the plurality of locus lines are arranged concentrically along a radial direction of the aerosol-generating substrate.

4. The aerosol-generating substrate of claim 3.

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

4. The aerosol-generating substrate of claim 3.

7. The airway holes are distributed in a matrix, the number of the airway holes in the first direction is the same as the number of the airway holes in the second direction, the airway holes on a single locus line are equally spaced, and the intervals between the locus lines are equal.

7. The aerosol-generating substrate of claim 6.

8. The number of the airway holes on a single trajectory line is 2 to 20, and the number of the plurality of trajectory lines is 2 to 20.

4. The aerosol-generating substrate of claim 3.

9. the cross-sectional shape of the airway hole in a plane perpendicular to the length of the aerosol-generating substrate is circular, elliptical, track-shaped, polygonal or sector-shaped; 2. The aerosol-generating substrate of claim 1.

10. an airway groove is formed in the outer wall of the aerosol-generating substrate, the airway groove penetrating at least one end of the aerosol-generating substrate along its length; An aerosol-forming substrate according to any one of claims 1 to 9.

11. 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 airway stoma; or In a plane perpendicular to the length of the aerosol-generating substrate, the cross-sectional shape of the airway groove is V-shaped, arc-shaped, rectangular, or trapezoidal.

11. The aerosol-generating substrate of claim 10.

12. The cross-sectional area of ​​the airway hole is 0.0019 mm ２ ~30mm ２ Or the hydraulic diameter of the airway hole is 0.05 mm to 6 mm. An aerosol-forming substrate according to any one of claims 1 to 9.

13. The wall thickness of the adjacent airway pore partitions is 10 μm to 800 μm. An aerosol-forming substrate according to any one of claims 1 to 9.

14. a center line along an extension direction of at least one of the plurality of airway holes overlaps with a center axis along a length direction of the aerosol-generating substrate; An aerosol-forming substrate according to any one of claims 1 to 9.

15. the cross-sectional shape of the aerosol-generating substrate in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate is elliptical, track-shaped or polygonal; 2. The aerosol-generating substrate of claim 1.

16. 1. An aerosol-generating product comprising: An aerosol-forming substrate according to any one of claims 1 to 15; 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 exterior layer that surrounds the functional segment and the aerosol-generating substrate in the circumferential direction.

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

17. The aerosol-generating product of claim 16.

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