Aerosol-forming substrates and aerosol-forming products

Abstract

The present application relates to the technical field of smoke-generating products and provides an aerosol-generating substrate and an aerosol-generating product, wherein the aerosol-generating substrate has pores with at least two different cross-sectional shapes, the pores being disposed inside the aerosol-generating substrate and penetrating at least one end of the aerosol-generating substrate along its length. Providing pores with at least two different cross-sectional shapes allows for flexible design of the cross-sectional area and cross-sectional shape of each pore, even when the size of the aerosol-generating substrate is limited. This not only facilitates adjustment of the aerosol flow resistance, i.e., the resistance to inhalation when a user inhales, but also facilitates adjustment of the medium mass distribution at different positions on the aerosol-generating substrate, thereby improving heating speed and heating uniformity.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on a Chinese patent application bearing application number 202310095263.4, filed with the China Patent Office on January 20, 2023, and claims priority to the above-mentioned Chinese patent application, the entire contents of which are incorporated herein by reference.

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

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

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

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

[0006] To achieve the above object, the present application provides an aerosol-generating substrate having pores of at least two different cross-sectional shapes, the pores being provided inside the aerosol-generating substrate and penetrating at least one end along the length of the aerosol-generating substrate.

[0007] In some embodiments, the pores penetrate opposite ends of the aerosol-generating substrate along its length, the aerosol-generating substrate is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, a first set of pores is arranged in the middle portion, and a second set of pores is arranged in the edge portion, the cross-sectional shape of each pore in the first set is the same, and the cross-sectional shape of at least one pore in the second set is different from the cross-sectional shape of the pores in the first set.

[0008] In some embodiments, the cross-sectional shape of the first set of pores is circular, and the cross-sectional shape of each pore of the second set is a fraction of the cross-sectional shape of the pores of the first set.

[0009] In some embodiments, the cross-sectional shape of the first set of pores is a regular hexagon, and the cross-sectional shape of each pore of the second set is a subset of the cross-sectional shape of the pores of the first set.

[0010] In some embodiments, the cross-sectional shape of the first set of pores is diamond-shaped, and the cross-sectional shape of each pore of the second set is a fraction of the cross-sectional shape of a pore of the first set.

[0011] In some embodiments, the cross-sectional shape of the first set of pores is a square, and the cross-sectional shape of each pore of the second set is a subset of the cross-sectional shape of the pores of the first set.

[0012] In some embodiments, all the pores of the first group are divided into a plurality of pore units, and the plurality of pores of the pore unit are arranged along a first direction, and the plurality of the pore units are arranged along a second direction, where the first direction and the second direction intersect.

[0013] In some embodiments, the pores of the pore unit are linearly arranged along a first direction, and the pore units are linearly arranged along a second direction.

[0014] In some embodiments, the pores of the pore unit are arranged circumferentially along a first direction, and the pore units are arranged interdigitated sequentially along a second direction.

[0015] In some embodiments, the cross-sectional shape of at least one of the pores is a first shape and the cross-sectional shape of at least one of the pores is a second shape.

[0016] In some embodiments, a portion of the first type of shape is the same as the second type of shape.

[0017] In some embodiments, the first shaped pores and the second shaped pores are both multiple, and each second shaped pore is surrounded by at least two first shaped pores.

[0018] In some embodiments, the first shaped pores and the second shaped pores are both multiple; all the pores of the first shape are divided into a plurality of first row groups, the plurality of pores in each of the first row groups are linearly arranged along a first direction, and the plurality of first row groups are linearly arranged along a second direction; all the pores of the second shape are divided into a plurality of second row groups, the plurality of pores in each of the second row groups are linearly arranged along the first direction, and the plurality of second row groups are linearly arranged along the second direction; The pores of the first shape and the pores of the second shape are alternately arranged in a first direction, and the pores of the first shape and the pores of the second shape are alternately arranged in a second direction.

[0019] In some embodiments, the aerosol-generating substrate has a single pore located on its centerline, the pore having a cross-sectional shape of a third type.

[0020] In some embodiments, the number of the first-shaped pores and the number of the second-shaped pores are each four, and the four first-shaped pores are symmetrically arranged along two mutually perpendicular straight lines passing through the third-shaped pores, and one second-shaped pore is provided between two adjacent first-shaped pores.

[0021] In some embodiments, the hydraulic diameter of the pores is between 0.05 mm and 6 mm; and / or The cross-sectional area of ​​the pore is 0.0019 mm 2 ~30mm 2 is.

[0022] In some embodiments, the aerosol-generating substrate has a circular cross-sectional shape.

[0023] In some embodiments, the aerosol-generating substrate comprises a plurality of pores, the pores communicating with each other and with the pores.

[0024] In some embodiments, the aerosol-generating substrate comprises a groove in the circumferential surface of the aerosol-generating substrate, the groove passing through at least one end along the length of the aerosol-generating substrate.

[0025] In another aspect of the present application, there is provided an aerosol-generating product, said aerosol-generating product comprising: an aerosol-generating substrate according to any one of the above; a functional segment provided at one end of the aerosol-generating substrate along its length, the functional segment including a filter segment for filtering the aerosol; and an exterior layer that surrounds the outer periphery of the functional segment and the outer periphery of the aerosol-generating substrate.

[0026] In some embodiments, the functional segment further comprises a temperature-reducing segment, the temperature-reducing segment being located between the filter segment and the aerosol-generating substrate.

[0027] The aerosol-generating substrate according to the present invention is used to generate an aerosol by heating, and its size is limited due to the requirement for portability, which is intended for users to carry. By providing pores with at least two different cross-sectional shapes, even in situations where the size of the aerosol-generating substrate is limited, it is possible to flexibly design the cross-sectional area and cross-sectional shape of each pore. This not only makes it easy to adjust the aerosol flow resistance, i.e., the inhalation resistance when the user inhales, but also makes it easy to adjust the medium mass distribution at different positions on the aerosol-generating substrate, thereby improving the heating rate and heating uniformity, reducing the occurrence of scorching due to insufficient or overheating, and ensuring as uniform an aerosol release as possible. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a schematic diagram of the structure of a first type of aerosol-generating substrate in one embodiment of the present application. [Figure 2] FIG. 2 is a schematic structural diagram of the first type of aerosol-generating substrate shown in FIG. 1 from another perspective. [Figure 3] 1 is a structural schematic diagram of a first type of aerosol-generating product according to one embodiment of the present application. [Figure 4] FIG. 4 is a schematic cross-sectional view taken along the direction AA in FIG. [Figure 5] 1 is a schematic structural diagram of a second type of aerosol-generating substrate according to one embodiment of the present application, in which the dashed frame exemplarily indicates a pore unit. [Figure 6] 1 is a schematic structural diagram of a third type of aerosol-generating substrate according to one embodiment of the present application, in which the dashed frame exemplarily indicates a pore unit. [Figure 7] FIG. 1 is a schematic structural diagram of a fourth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 8]8 is a schematic structural diagram of the fourth type of aerosol-generating substrate shown in FIG. 7 from another perspective, in which the dashed frame exemplarily indicates the first set. [Figure 9] FIG. 1 is a schematic structural diagram of a fifth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 10] FIG. 10 is a schematic structural diagram of the fifth type of aerosol-generating substrate shown in FIG. 9 from another perspective. [Figure 11] FIG. 1 is a schematic structural diagram of a sixth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 12] FIG. 1 is a schematic structural diagram of a seventh type of aerosol-generating substrate according to one embodiment of the present application. [Figure 13] FIG. 1 is a schematic structural diagram of an eighth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 14] FIG. 14 is a schematic structural diagram of the eighth type of aerosol-generating substrate shown in FIG. 13 from another perspective. [Figure 15] FIG. 1 is a schematic structural diagram of a ninth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 16] FIG. 1 is a schematic diagram of the structure of a tenth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 17] FIG. 1 is a schematic diagram of the structure of an eleventh type of aerosol-generating substrate according to one embodiment of the present application. [Figure 18] FIG. 1 is a schematic diagram of the structure of a twelfth type of aerosol-generating substrate according to one embodiment of the present application. [Figure 19] FIG. 3 is a cross-sectional view of the first type of aerosol-generating substrate shown in FIG. 2. [Figure 20] FIG. 2 is a structural schematic diagram of a second type of aerosol-generating product according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0029] It should be noted that, unless inconsistent, the examples and technical features in the examples in this application can be combined with each other, and the detailed description of the specific embodiments should be understood to be for the purpose of explaining the gist of this application and should not be considered as an undue limitation on this application.

[0030] 1 and 2, an embodiment of the present application provides an aerosol-generating substrate 10. The aerosol-generating substrate 10 is heated and used to generate an aerosol.

[0031] For example, the aerosol-generating substrate 10 can be used to generate an aerosol by a heating and combustion method. The aerosol-generating substrate 10 can also be used to generate an aerosol by a heating and non-combustion method. That is, the aerosol-generating substrate 10 generates an aerosol by being heated below its ignition point. That is, the aerosol-generating substrate 10 does not burn during the process of generating an aerosol. The embodiments of the present application will be described using the heating and non-combustion method as an example.

[0032] 1 and 2, the aerosol-generating substrate 10 has pores 1 with at least two different cross-sectional shapes. The pores 1 are provided inside the aerosol-generating substrate 10 and penetrate at least one end of the aerosol-generating substrate 10 along its length. The pores 1 are used to collect and distribute the aerosol. That is, the cross-sectional shapes include two or more types. As a result, the cross-sectional shapes of at least two pores 1 are different.

[0033] The cross section of the pore 1 is a plane perpendicular to the flow direction of the pore 1, and is also the cross section of the flow path of the pore 1. The cross section may be a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10. The cross-sectional shape of the pore 1 refers to the shape that appears when a single pore 1 is cut in cross section.

[0034] 3 and 4, the aerosol-generating substrate 10 according to any embodiment of the present application is used in an aerosol-generating product. The aerosol-generating product includes the aerosol-generating substrate 10 according to any embodiment of the present application, a functional segment 20, and an exterior layer 30. The functional segment 20 is provided at one end along the length of the aerosol-generating substrate 10 and includes a filter segment 21 for filtering the aerosol. The exterior layer 30 surrounds the outer periphery of the functional segment 20 and the outer periphery of the aerosol-generating substrate 10.

[0035] The filter segment 21 is used to filter the aerosol generated by the aerosol-generating substrate 10 .

[0036] The aerosol-generating product is used by a user to inhale the aerosol generated by the aerosol-generating substrate 10. For example, a user can hold the filter segment 21 in their mouth and inhale the filtered aerosol. The aerosol generated by the aerosol-generating substrate 10 is transported to the filter segment 21 by the pores 1 under the action of negative suction pressure.

[0037] The aerosol-generating substrate 10 according to the embodiment of the present application is used to generate an aerosol by heating, and its size is limited by the requirement for portability, which is intended for carrying by a user. By providing pores 1 with at least two different cross-sectional shapes, even in situations where the size of the aerosol-generating substrate 10 is limited, the cross-sectional area and cross-sectional shape of each pore 1 can be flexibly designed. This not only makes it easy to adjust the aerosol flow resistance, i.e., the inhalation resistance when the user inhales, but also makes it easy to adjust the medium mass distribution at different positions on the aerosol-generating substrate 10. This improves the heating speed and heating uniformity, reduces the occurrence of burning due to insufficient or overheating, and ensures that the aerosol is emitted as uniformly as possible.

[0038] The aerosol-generating product is used in combination with an aerosol-generating device having a heating assembly, which heats and atomizes the aerosol-generating substrate 10 to generate the aerosol.

[0039] There are several heating modes for the heating assembly, and illustratively, the heating modes include central heating, peripheral heating, and / or bottom heating. The central heating mode refers to a mode in which the heating assembly is inserted inside the aerosol-generating product and heats the aerosol-generating product by toasting it from the inside out. The peripheral heating mode refers to a mode in which the heating assembly is placed around the outside of the aerosol-generating product and heats it by toasting it from the outside in. The bottom heating mode refers to a mode in which the heating assembly is located below the aerosol-generating product and first heats the air using the heating assembly, and then the hot air toasts and heats the aerosol-generating product from below up.

[0040] The heating assembly may be configured to generate heat using, but is not limited to, resistive heating, electromagnetic heating, infrared heating, microwave heating, or laser heating.

[0041] In some embodiments, referring to FIG. 4, the functional segment 20 may be provided with only a filter segment 21 .

[0042] 20, in some other embodiments, the functional segment 20 further includes a temperature-reducing segment 22, which is located between the filter segment 21 and the aerosol-generating substrate 10, and is used to reduce the temperature of the aerosol before it is filtered by the filter segment 21. The temperature-reducing segment 22 can improve the "hot mouth" phenomenon when a user inhales the aerosol.

[0043] The exterior layer 30 may include, but is not limited to, one or more combinations of materials such as fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, polyethylene (PE), and polybutylene adipate terephthalate (PBAT).

[0044] The temperature-reducing material employed by the temperature-reducing segment 22 includes, but is not limited to, one or more combinations of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber.

[0045] The filtering material employed by the filter segment 21 includes, but is not limited to, one or more combinations of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, and propylene fiber.

[0046] The materials of the temperature-reducing segment 22 and the filter segment 21 may be the same or different.

[0047] In some embodiments, the aerosol-generating substrate 10 may have a substantially cylindrical structure, i.e., the aerosol-generating substrate 10 is substantially elongated rather than flake-like, with the longitudinal dimension of the aerosol-generating substrate 10 being greater than the maximum distance between any two points on its cross-section.

[0048] For example, the cross-sectional shape of the aerosol-generating substrate 10 in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10 may be, but is not limited to, a circle, an ellipse, a track, a polygon, etc. When the cross-sectional shape of the aerosol-generating substrate 10 is one of the above regular shapes, the product will have good consistency and the product quality can be easily monitored.

[0049] 5 to 19, the aerosol-generating substrate 10 has a circular cross-sectional shape. This means that the edges of the aerosol-generating substrate 10 are essentially free of sharp corners, reducing the risk of corner collapse due to stress concentration. In the examples of the present application, the aerosol-generating substrate 10 has a circular cross-sectional shape, i.e., is cylindrical. The longitudinal size of the aerosol-generating substrate 10 is greater than the maximum distance between two points on its cross-section, e.g., its diameter.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] The function of the smoke injector component is to generate a large amount of vapor upon heating, thereby improving the aerosol yield of the smoke product. In one embodiment, the smoke injector may include, for example, one or more combinations of monohydric alcohols (e.g., menthol), polyhydric alcohols (e.g., propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin), esters of polyhydric alcohols (e.g., monoacetin, diacetin, or triacetin), aliphatic esters of monocarboxylic acids, polycarboxylic acids (e.g., lauric acid, myristic acid), or polycarboxylic acids (e.g., dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, mesoerythritol, diacetin mixtures, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0056] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from a natural plant, and may include one or more of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The adhesive is used to make the particles adhere to each other and prevent them from scattering. It also improves the water resistance of the aerosol-generating substrate, is harmless to the human body, and has certain health benefits.

[0057] In one embodiment, the aerosol-generating substrate 10 has a monolithic structure. For example, the aerosol-generating substrate 10 can be a monolithic structure formed by a process such as injection molding, compression molding, or extrusion. Here, extrusion refers to a processing method in which a raw material mixture is fed into an extruder, and the material is heated and plasticized 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 head to produce finished or semi-finished products with various cross sections. The aerosol substrate formed by extrusion is rod-shaped. This allows the aerosol-generating substrate 10 to remain a monolithic medium even after being heated and sucked, or after heat exposure is stopped, and is less likely to collapse and fall off. This solves the problems of loose flakes, falling off of thread-like or particle-like components, and difficulty in cleaning that exist in the three types of aerosol-generating substrates used in the prior art: flake-shaped, dispersed particle-shaped, and filament-shaped.

[0058] 1, 2, and 5 to 8, in one embodiment, pores 1 penetrate opposite ends of an aerosol-generating substrate 10 along its length, the aerosol-generating substrate 10 being divided into a middle portion 11 and an edge portion 12, the edge portion 12 surrounding the middle portion 11, a first set 101 of pores 1 being arranged in the middle portion 11, and a second set 102 of pores 1 being arranged in the edge portion 12, the pores 1 in the first set 101 having the same cross-sectional shape, and at least one pore 1 in the second set 102 having a cross-sectional shape different from that of the pores 1 in the first set 101. In other words, the pores 1 in the second set 102 surround the pores 1 in the first set 101. The concentrated distribution of pores with different cross-sectional shapes not only facilitates manufacturing, but also makes it easier to control the medium mass distribution in the aerosol-generating substrate 10 by rationally arranging the different cross-sectional shapes. Under the condition that the size of the aerosol-generating substrate 10 is constant, the total cross-sectional area of ​​the pores 1 can be increased as much as possible and the thickness of the partition walls can be made as uniform as possible, thereby achieving good and consistent heat transfer during the heating process and achieving consistent aerosol release of the medium during the heating and suction process. This thereby achieves both the structural stability of the aerosol-generating substrate 10 and the uniformity of aerosol release, improving the suction experience.

[0059] 2 and 6, in one embodiment, the cross-sectional shape of each pore 1 in the second set 102 is different from the cross-sectional shape of the pores 1 in the first set 101. That is, the cross-sectional shape of each pore 1 in the second set 102 is the same as the cross-sectional shape of the pores 1 in the first set 101.

[0060] Illustratively, in one embodiment, referring to FIGS. 5 and 8, the cross-sectional shapes of some of the pores 1 in the second set 102 are different from the cross-sectional shapes of the pores 1 in the first set 101, and the cross-sectional shapes of the remaining pores 1 in the second set 102 are different from the cross-sectional shapes of the pores 1 in the first set 101.

[0061] 2, in one embodiment, the cross-sectional shapes of the pores 1 in the first set 101 are all first type shapes 100, and the cross-sectional shapes of the pores 1 in the second set 102 are all the same and are all second type shapes 200. That is, the pores 1 in all the first type shapes 100 are distributed in the middle portion 11, and the pores 1 in all the second type shapes 200 are distributed in the edge portion 12. The pores 1 in each second type shape 200 surround the pores 1 in all the first type shapes 100.

[0062] 2, in one specific embodiment, the cross-sectional shape of the pores 1 in the first group 101 is circular, and the cross-sectional shape of each pore 1 in the second group 102 is a portion of the cross-sectional shape of the pores 1 in the first group 101. The cross-sectional shape of each pore in the second group 102 is a portion of a circle, for example, the cross-sectional shape of each pore in the second group 102 is arcuate. The circular pores 1 can increase the lateral support strength of the aerosol-generating substrate 10 and improve the reworkability of the aerosol-generating substrate 10.

[0063] 5, in one specific example, the cross-sectional shape of the pores 1 in the first set 101 is a regular hexagon, and the cross-sectional shape of each pore 1 in the second set 102 is a portion of the cross-sectional shape of the pores 1 in the first set 101. The cross-sectional shape of each pore in the second set 102 is a portion of a regular hexagon, for example, the cross-sectional shape of each pore in the second set 102 is a trapezoid. A regular hexagon is an optimal topological structure for covering a two-dimensional plane, and the regular hexagonal pores 1 can more uniformly divide the cross-section of their middle portion.

[0064] 6, in one specific embodiment, the cross-sectional shape of the pores 1 in the first group 101 is diamond-shaped, and the cross-sectional shape of each pore 1 in the second group 102 is a portion of the cross-sectional shape of the pores 1 in the first group 101. The cross-sectional shape of each pore in the second group 102 is a portion of a diamond, for example, the cross-sectional shape of each pore in the second group 102 is triangular. The diamond-shaped pores 1 can improve the lateral cutting performance of the aerosol-generating substrate 10 and reduce deformation caused by cutting during the processing of the aerosol-generating substrate 10.

[0065] 7, in one specific embodiment, the cross-sectional shape of the pores 1 in the first group 101 is a regular square, and the cross-sectional shape of each pore 1 in the second group 102 is a portion of the cross-sectional shape of the pores 1 in the first group 101. The cross-sectional shape of each pore in the second group 102 is a portion of a regular square, for example, the cross-sectional shape of each pore in the second group 102 is a triangle. A regular square has the characteristic of having constant side lengths, which can increase the utilization rate of the cross-section of the aerosol-generating substrate 10 and improve the heating uniformity of the aerosol-generating substrate 10.

[0066] 6-8, in one embodiment, the cross-sectional shapes of the pores 1 in the first set 101 are a first type of shape 100, and the second set 102 has two or more types of cross-sectional shapes. Illustratively, the cross-sectional shapes in the second set 102 can include a second type of shape 200 and a third type of shape 300.

[0067] For example, in one embodiment, the cross-sectional shapes of the pores 1 in the second set 102 are all different. That is, the second set 102 has the same number of cross-sectional shapes as the number of pores 1. For example, if the number of pores 1 in the second set 102 is five, the pores 1 in the second set 102 have five different cross-sectional shapes. In another example, if the number of pores 1 in the second set 102 is six, the pores 1 in the second set 102 have six different cross-sectional shapes.

[0068] In the examples of the present application, "plurality" means two or more.

[0069] 1, 2, and 5 to 8, in one embodiment, a portion of the cross-sectional shape of each pore 1 in the first group 101 is the same as a portion of the cross-sectional shape of each pore 1 in the second group 102. For example, some of the pores 1 in the first group 101 are cut by the edge 12 to form the pores 1 in the second group 102. For example, when the aerosol-generating substrate 10 is manufactured into a one-piece structure by an extrusion process, the edge die and the circumferential die surrounding the die cavity cooperate to form the pores 1 in the second group 102 during the process of extruding the atomization medium from the die. That is, the peripheral wall of the die cavity surrounding the circumferential die extrudes the outer periphery of the atomization medium, and the outer periphery cuts the pores 1 in the first group 101 that are close to the outer periphery to form the pores 1 in the second group 102.

[0070] In one specific example, referring to FIG. 6 , the cross-sectional shape of each pore 1 in the first set 101 is diamond-shaped, and the pores 1 in the first set 101 are uniformly distributed. A portion of the cross-sectional shape of each pore 1 in the first set 101 is identical to the cross-sectional shape of each pore 1 in the second set 102 (some pores 1 in the second set 102 resemble a fan). The advantages of this distribution are increased porosity, uniform wall thickness, uniform heat transfer efficiency, and uniform medium release. The angles of the single diamond-shaped pore 1 are uneven. When the aerosol passes through the diamond-shaped pore 1, turbulence occurs at locations with small angles, resulting in differences in flow velocity. The aerosol flow velocity of the irregular pores 1 in the second set 102 is also different from that of the diamond-shaped pores 1. This allows aerosols with similar compositions to be gradually obtained at different speeds, improving the inhalation experience and enhancing sensory consistency.

[0071] 5, in one specific embodiment, the cross-sectional shape of each pore 1 in the first group 101 is a regular hexagon, the pores 1 in the first group 101 are uniformly distributed, and a portion of the cross-sectional shape of each pore 1 in the first group 101 is the same as the cross-sectional shape of each pore 1 in the second group 102 (the pores 1 in the second group 102 resemble a trapezoid with an arc-shaped base). The advantages of this distribution are increased porosity, uniform and stable wall thickness of the medium, stable heat transfer, and stable emission. Each pore 1 in the second group 102 can generate aerosols with different velocities. The regular hexagonal arrangement enhances lateral strength and improves the yield rate during processing. Furthermore, this arrangement increases the aerosol emission area within the aerosol-generating substrate 10 and provides uniformity in the medium mass distribution. The good aerosol emission rate and stability during the heating and suction process improve the consumer experience.

[0072] In one embodiment, referring to Figures 1, 2, and 5 to 16, the cross-sectional shape of at least one pore 1 is a first type of shape 100, and the cross-sectional shape of at least one pore 1 is a second type of shape 200.

[0073] 1, 2, and 5 to 8, in one embodiment, a portion of the first type of shape 100 is the same as the second type of shape 200, and all of the pores 1 of the second type of shape 200 are distributed along the edge 12. Illustratively, the cross-sectional area of ​​the pores 1 of the second type of shape 200 is smaller than that of the first type of shape 100. By distributing the pores 1 of the second type of shape 200 along the edge 12, the pores 1 of the first type of shape 100 and the pores 1 of the second type of shape 200 can be arranged as many times as possible throughout the aerosol-generating substrate 10, effectively increasing the number of airflow channels and avoiding excessive thinning of the wall thickness due to the pores 1 having a cross-sectional area that is too large.

[0074] In one embodiment, a portion of the first shape 100 is cut by the edge 12 to form the second shape 200. For example, when the aerosol-generating substrate 10 is manufactured into a one-piece structure by an extrusion process, the edge die and the circumferential die surrounding the die cavity cooperate to form the pores 1 of the second shape 200 during the process of extruding the atomization medium from the die. That is, the peripheral wall of the die cavity surrounding the circumferential die extrudes the outer edge of the atomization medium, and the outer edge cuts the pores 1 of the first shape 100 adjacent to the outer edge, thereby forming the pores 1 of the second shape 200.

[0075] 1, 2, and 5 to 8, in one embodiment, the pores 1 in the first group 101 are uniformly distributed in the middle portion 11. Illustratively, the pores 1 of each first type of shape 100 are uniformly distributed in the middle portion 11. With this design, the mass distribution at different positions in the middle portion 11 is approximately the same, and the cross-sectional areas of the pores 1 at different positions in the middle portion 11 are also approximately the same. This tends to match the aerosol emission amount and flow resistance at different positions in the middle portion 11, thereby improving the uniformity of aerosol emission during the inhalation process and ensuring that the inhalation amount per inhalation is approximately the same, improving the consistency of inhalation and providing a better inhalation experience.

[0076] The term "uniformly distributed" means that the pores 1 themselves are uniformly distributed.

[0077] The manner in which the uniform distribution of pores 1 in each first type shape 100 is achieved is not limited, and for example, in some embodiments, referring to Figures 1, 2, and 5 to 8, the uniform distribution of pores 1 in each first type shape 100 includes the cross-sectional area of ​​each first type shape 100 being equal and the thickness of the partition walls of two adjacent first type shapes 100 being equal.

[0078] The equal cross-sectional area of ​​the pores 1 of each first shape 100 may be achieved by the pores 1 of each first shape 100 having the same cross-sectional shape and the same hydraulic diameter of the cross section. For example, the pores 1 of each first shape 100 may have a circular cross-sectional shape and the same diameter of the cross section.

[0079] The hydraulic diameter refers to the ratio of four times the cross-sectional area of ​​the flow path to the perimeter. The cross-section of the flow path refers to a cross section taken perpendicular to the fluid flow flux, i.e., the transverse cross section of the pore 1. For example, if the cross-sectional shape of the pore 1 is a square, the hydraulic diameter is the ratio of four times the cross-sectional area of ​​the square pore 1 to the perimeter of the square. In another example, if the cross-sectional shape of the pore 1 is circular, the hydraulic diameter is the diameter of the circular pore 1.

[0080] 5 and 6, in one embodiment, the pores 1 of all the first shapes 100 are divided into a plurality of pore units 1011, and the pores 1 of each pore unit 1011 are arranged along a first direction and the pore units 1011 are arranged along a second direction, where the first direction intersects with the second direction. In this way, all the pores 1 are arranged two-dimensionally, which improves the structural strength and aerosol emission rate of the aerosol-generating substrate 10 and facilitates effective use of the aerosol-generating substrate 10.

[0081] 2, 5, 6, and 8, in one embodiment, the pores 1 of the pore unit 1011 are linearly arranged along a first direction, and the pore units 1011 are linearly arranged along a second direction. For example, the pores 1 of all the first shapes 100 are distributed in a matrix or lattice pattern. In this way, the pores 1 of all the first shapes 100 are regularly arranged, which facilitates design and manufacturing and improves product consistency.

[0082] As can be understood, regular arrangement refers to an arrangement according to a predetermined rule.

[0083] In one embodiment, the pores 1 of the pore unit 1011 are arranged circumferentially along the first direction, and the pore units 1011 are sequentially interdigitated along the second direction. That is, the pores 1 of all the first shapes 100 are distributed in multiple interdigitated rings. For example, each ring may be a circular ring, and the centers of the multiple rings may or may not coincide. If the centers of the multiple rings coincide, the interdigitated rings will be distributed in multiple concentric rings. In this way, the pores 1 of all the first shapes 100 are regularly arranged, which facilitates design and manufacturing and improves product consistency. For example, by adjusting the spacing between different rings and / or the number of pores 1 in the same ring, the mass distribution of the aerosol-generating substrate 10, the heating rate at different positions in the middle portion 11, and / or the aerosol flow resistance can be adjusted, thereby improving the user's inhalation experience.

[0084] In one embodiment, referring to Figures 1, 2, and 5 to 16, the cross-sectional shape of at least one pore 1 is a first type of shape 100, and the cross-sectional shape of at least one pore 1 is a second type of shape 200. The first type of shape 100 and the second type of shape 200 are different. Exemplarily, the cross-sectional shape of one pore 1 may be the first type of shape 100, and the cross-sectional shapes of two or more pores 1 may be the first type of shape 100. Exemplarily, the cross-sectional shape of one pore 1 may be the second type of shape 200, and the cross-sectional shapes of two or more pores 1 may be the second type of shape 200.

[0085] 1, 2, and 5-8, in one embodiment, a portion of the first type of shape 100 is identical to the second type of shape 200. That is, the second type of shape 200 is a portion of the first type of shape 100, and the second type of shape 200 may coincide with a portion of the first type of shape 100. For example, the first type of shape 100 may be a circle, and the second type of shape 200 may be a semicircle or an arcuate shape. In another example, the first type of shape 100 may be a square, and the second type of shape 200 may be a sector or a triangle.

[0086] 1, 2, and 5 to 16, in one embodiment, the first type of shape 100 may be a circle, an ellipse, a sector, or a polygon. Polygons include, but are not limited to, triangles, rectangles, pentagons, and hexagons. The rectangles may be squares or diamonds. When the cross-sectional shape of the pores 1 is a regular shape, the product has good consistency and the product quality can be easily monitored.

[0087] In one embodiment, referring to FIGS. 1, 2, and 5 to 16, the second type of shape 200 may be a circle, an ellipse, a sector, a segment, a polygon, or an irregular shape. Polygons include, but are not limited to, triangles, rectangles, pentagons, and hexagons. Rectangles may be squares or diamonds. When the cross-sectional shape of the pores 1 is a regular shape, the product has good consistency and the product quality can be easily monitored. The cross-sectional shape of the pores 1 may also be an irregular shape, such as an irregular shape.

[0088] 9 to 12, in one embodiment, the pores 1 of the first shape 100 and the pores 1 of the second shape 200 are both multiple, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. With this design, by arranging the pores 1 of the second shape 200 in the area surrounded by the pores 1 of the at least two first shapes 100, the pores 1 of the second shape 200 can adjust the medium mass in the area surrounded by the pores 1 of the at least two first shapes 100, thereby adjusting the resistance to drawing, the amount of aerosol released, the heating rate, etc.

[0089] For example, in one embodiment, the cross-sectional area of ​​the pores 1 of the second shape 200 is smaller than the cross-sectional area of ​​the pores 1 of the first shape 100, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. As a result, compared to a case where all pores 1 of the first shape 100 are configured with pores 1 of the second shape 200 without changing the cross-sectional area of ​​the aerosol-generating substrate 10, by arranging the pores 1 of the second shape 200 in an area surrounded by pores 1 of at least two first shapes 100, the thickness of the partition between two adjacent pores 1 can be made relatively thick, the amount of aerosol released can be made relatively large, and the collapse of the pores 1 can be avoided to some extent.

[0090] 9 and 10 , in one specific embodiment, the second type of shapes 200 are rhombuses, equilateral triangles, regular hexagons, or other regular polygons, and the first type of shapes 100 are circular, with the pores 1 of each second type of shape 200 being surrounded by the pores 1 of at least two of the first type of shapes 100. The advantage of this distribution is that the rhombuses 1 fill the spaces between the circular pores 1, increasing the overall porosity, reducing the thickness of the partition walls between the circular pores 1, and making the wall thickness more uniform, thereby improving heat transfer efficiency and aerosol release speed, shortening the waiting time for heating during the user's inhalation process, and improving the user's usage experience.

[0091] 12, in one specific example, the second type of shapes 200 are diamond-shaped, and the first type of shapes 100 are regular pentagonal, with the pores 1 of each second type of shape 200 being surrounded by the pores 1 of at least two of the first type of shapes 100. The advantage of this distribution is that the diamond-shaped pores 1 fill the spaces between the pentagonal pores 1, increasing the overall porosity, reducing the wall thickness in the area surrounded by the four pentagonal pores, and making the wall thickness relatively uniform, thereby improving the heat transfer efficiency, medium discharge rate, and suction consistency.

[0092] 13 to 15, in one embodiment, the pores 1 of the first type shape 100 and the pores 1 of the second type shape 200 are both multiple. The pores 1 of all the first type shapes 100 are divided into multiple first row groups, and the multiple pores 1 in each first row group are linearly arranged along the first direction, and the multiple first row groups are linearly arranged along the second direction. The pores 1 of all the second type shapes 200 are divided into multiple second row groups, and the multiple pores 1 in each second row group are linearly arranged along the first direction, and the multiple second row groups are linearly arranged along the second direction. In other words, the pores 1 of all the second type shapes 200 are distributed in a two-dimensional matrix. The pores 1 of the first type of shape 100 and the pores 1 of the second type of shape 200 are arranged alternately in a first direction, and the pores 1 of the first type of shape 100 and the pores 1 of the second type of shape 200 are arranged alternately in a second direction.

[0093] "Alternately arranged in the first direction" means that one pore 1 of the second type of shape 200 is provided between the pores 1 of any two adjacent first type of shapes 100 in the first direction. "Alternately arranged in the second direction" means that one pore 1 of the second type of shape 200 is provided between the pores 1 of any two adjacent first type of shapes 100 in the second direction.

[0094] With this design, the mass distribution at different positions on the aerosol-generating substrate 10 is approximately the same, and the cross-sectional areas of the pores 1 at different positions on the aerosol-generating substrate 10 are also approximately the same, so that the aerosol emission amount and flow resistance at different positions on the aerosol-generating substrate 10 tend to be consistent, thereby improving the uniformity of aerosol emission during the inhalation process, and the inhalation amount per inhalation is approximately the same during the inhalation process, improving the consistency of inhalation and providing a better inhalation experience.

[0095] 13 to 15, in one specific embodiment, the second type of shape 200 is a rhombus, equilateral triangle, regular hexagon, or other regular polygon, the first type of shape 100 is a circle, and the pores 1 of the first type of shape 100 and the pores 1 of the second type of shape 200 are alternately arranged in a first direction, while the pores 1 of the first type of shape 100 and the pores 1 of the second type of shape 200 are alternately arranged in a second direction. The advantage of this arrangement is that the area of ​​a regular polygon with the same perimeter is smaller than the area of ​​a circle. Therefore, when the cross-sectional area of ​​the aerosol-generating substrate 10 is constant, arranging circles and regular polygons, such as equilateral triangles and regular hexagons, at intervals can increase the medium mass per unit volume, improve the stability of the pores 1, and increase the number of puffs.

[0096] 16, in one embodiment, a pore 1 having a cross-sectional shape of a third type 300 is provided on the center line of the aerosol-generating substrate 10. This allows the pore 1 having the third type 300 shape to be provided at the center of the aerosol-generating substrate 10. According to the laws of fluid mechanics, the central flow velocity is greater than the peripheral flow velocity during negative pressure suction. Therefore, providing the pore 1 having the third type 300 shape on the center line of the aerosol-generating substrate 10 can further enhance the uniform release of the aerosol from the center to the periphery, or stabilize the uniform release of the aerosol throughout the aerosol-generating substrate 10.

[0097] The center line of the aerosol-generating substrate 10 is a line connecting the geometric centers of two end faces along the length of the aerosol-generating substrate 10. For example, if the aerosol-generating substrate 10 is a cylindrical body, the center line of the aerosol-generating substrate 10 is a line connecting the centers of the two circular end faces along the length of the aerosol-generating substrate 10.

[0098] 16, in one embodiment, the first shape 100 and the second shape 200 each have four pores 1, and the four pores 1 of the first shape 100 are symmetrically arranged along two perpendicular lines passing through the pores 1 of the third shape 300, with one pore 1 of the second shape 200 being provided between each pair of adjacent pores 1 of the first shape 100. In this manner, the nine pores 1 are distributed in a roughly cross-shaped pattern, and the rational combination of pores 1 with different cross-sectional areas results in an appropriate mass distribution of the medium, which is beneficial for uniform aerosol release.

[0099] In one specific example, referring to FIG. 16, the first shape 100 is a sector, the second shape 200 is a rectangle, and the third shape 300 is a square, and there are four pores 1 in each of the first shape 100 and the second shape 200, and the four pores 1 in each of the first shape 100 are symmetrically arranged along two mutually perpendicular straight lines passing through the pores 1 in the third shape 300, and one pore 1 in each of the second shape 200 is provided between two adjacent pores 1 in each of the first shape 100.

[0100] In one embodiment, the cross-sectional area of ​​the pore 1 is 0.0019 mm 2 (square millimeter) ~ 30mm 2 For example, the cross-sectional area of ​​the pore 1 is 0.002 mm 2 , 0.1mm 2 , 0.2mm 2 , 0.4mm 2 , 0.5mm 2 , 0.8mm 2 , 1mm 2 , 1.3mm 2 , 1.6mm2 , 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 or 6mm 2 And so on.

[0101] The cross-sectional area of ​​pore 1 is 30 mm 2 If the number of pores 1 is greater than this, the number of pores 1 will be relatively small, the aerosol-generating substrate 10 will be prone to burning, and the aerosol-generating substrate 10 will be prone to uneven aerosol emission during the heating process (for example, a large amount of aerosol will be emitted in the first two puffs and a small amount in the subsequent puffs), which will affect the user's smoking experience.

[0102] The cross-sectional area of ​​pore 1 is 0.0019 mm 2 If it is less than this, the molding process becomes significantly more difficult, it becomes difficult to control the size of the pores 1, and the reject rate of the aerosol-generating substrate 10 increases.

[0103] On the other hand, the cross-sectional area of ​​pore 1 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 easier to extract the aerosol inside the aerosol-generating substrate 10, resulting in more uniform aerosol release and higher utilization rate, and the aerosol-generating substrate 10 being less likely to burn, resulting in a better user experience and easier processing and manufacturing.

[0104] Preferably, the cross-sectional area of ​​the pore 1 is 0.007 mm 2 ~7.1mm 2 (square millimeters). For example, 0.1 mm 2 , 0.2mm 2 , 0.4mm2 , 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.

[0105] For example, the hydraulic diameter of the pores 1 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.

[0106] If the hydraulic diameter of the pores 1 exceeds 6 mm, the number of pores 1 will be relatively small, making it easier for the smoke-generating medium segment 10 to burn, and the smoke-generating medium segment 10 is more likely to emit uneven aerosol during the heating process (e.g., 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.

[0107] If the hydraulic diameter of the pores 1 is less than 0.05 mm, the molding process becomes significantly more difficult, the size of the pores 1 becomes difficult to control, and the reject rate of the smoke medium segments 10 increases.

[0108] When the hydraulic diameter of the pores 1 is within the range of 0.05 mm to 6 mm, the flow resistance of the smoke-generating medium segment 10 is relatively small (i.e., the suction resistance is relatively small), and the aerosol flow rate is appropriate, making it easier to extract the aerosol inside the smoke-generating medium segment 10, resulting in more uniform aerosol release and higher utilization rate, and less chance of the smoke-generating medium segment 10 burning, resulting in a relatively high user experience and easier processing and manufacturing.

[0109] In some embodiments, the hydraulic diameter of the pores 1 is between 0.1 mm and 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.

[0110] For example, in one embodiment, the third type of shape 300 may be a circle, an ellipse, a sector, or a polygon. The polygon may be, but is not limited to, a triangle, a rectangle, a pentagon, or a hexagon. The rectangle may be a square or a diamond. When the cross-sectional shape of the pore 1 is a regular shape, the product has good consistency and the product quality can be easily monitored.

[0111] In one embodiment, the aerosol-generating substrate 10 has a plurality of pores, which communicate with each other and with the pores 1. Specifically, the pores communicate with each other and with the surface of the material. That is, the pores can communicate with the pores 1. The pores have capillary action, and can introduce aerosol into the pores 1 by capillary action. The aerosol generated by the aerosol-generating substrate 10 overflows through the pores into the pores 1, and the aerosol is collected by the pores 1. This can increase the utilization rate of the active ingredient in the aerosol-generating substrate 10.

[0112] It should be understood that the plurality of micropores is arranged irregularly. That is, the micropores are generated randomly. The plurality of micropores is arranged irregularly. The irregular arrangement means that there is no predetermined rule, and for example, in the micropore formation process, it is basically impossible to artificially precisely control the positions of the micropores.

[0113] In one embodiment, referring to FIG. 11 , the aerosol-generating substrate 10 includes a groove 2 formed on the circumferential surface of the aerosol-generating substrate 10, the groove 2 penetrating at least one end along the length of the aerosol-generating substrate 10. Specifically, the groove 2 has a notch that opens outward. Meanwhile, the groove 2 increases the external surface area of ​​the aerosol-generating substrate 10, improving heat conduction efficiency and further favoring the extraction of active ingredients. For example, when the heating method is circumferential heating, this method can adjust the heating rate of the entire aerosol-generating substrate 10, improving the consumer experience. Meanwhile, for example, the outer periphery of the aerosol-generating substrate 10 is wrapped with an exterior layer 30, which can close the notch of the groove 2. The outer layer 30 and the grooves 2 cooperate to form through-holes that are open only at both ends along the length of the aerosol-generating substrate 10; that is, the outer layer 30 and the grooves 2 cooperate to form channels similar to the pores 1, which also serve to collect the aerosol, and thus provide a guideway effect that restricts the flow of aerosol and external air in the length direction, thereby increasing the amount of air inflow and improving the aerosol extraction efficiency.

[0114] 4, in some embodiments, the pore 1 may be a straight pore. That is, a single pore 1 extends linearly along the length direction. This makes the pore 1 easy to mold and reduces the difficulty of manufacturing.

[0115] In some embodiments, the cross-sectional area of ​​the pore 1 is equal at any position in the length direction. For example, if the cross-sectional shape of the pore 1 is circular, the diameter of the pore 1 is equal at any position in the length direction, i.e., the pore 1 is an equidiameter pore.

[0116] 11, in some embodiments, the single groove 2 can extend linearly along the length, which makes the groove 2 easier to mold and less difficult to manufacture.

[0117] In some embodiments, and with reference to FIG. 11, the grooves 2 have equal cross-sectional areas at any point along the length of the aerosol-generating substrate 10 .

[0118] In the examples of the present application, unless otherwise specified, the length direction refers to the length direction of the aerosol-generating substrate 10.

[0119] In the present embodiment, the airways include pores 1 and / or grooves 2.

[0120] In some embodiments, referring to Figure 17, all of the airways extend through the same end of the aerosol-generating substrate 10 along its length, and all other ends are closed, i.e., all of the pores 1 and / or grooves 2 open towards the same end.

[0121] 18, in some other embodiments, some airways penetrate one end of the aerosol-generating substrate 10 along its length, and some other airways penetrate the other end of the aerosol-generating substrate 10 along its length. For example, some airways 1 may penetrate one end of the aerosol-generating substrate 10 along its length, and some other airways 1 may penetrate the other end of the aerosol-generating substrate 10 along its length.

[0122] In some other embodiments, referring to Figure 19, each airway penetrates both ends of the aerosol-generating substrate 10 along its length, and airflow can flow from one end of the aerosol-generating substrate 10 along its length through the airway to the other end of the aerosol-generating substrate 10 along its length.

[0123] Note that airways, such as pores 1 and grooves 2, belong to pores or grooves in the macroscopic sense, while micropores belong to pores or grooves in the microscopic sense, and the cross-sectional areas of pores 1 and grooves 2 are both much larger than the cross-sectional areas of micropores.

[0124] For example, the cross-sectional area of ​​the airway is at least 20 times that of the pores. If the size of the pores is approximately constant, if it is less than 20 times, the size of the airway is too small, making it difficult for the aerosol to be released from the inner wall of the airway into the airway, and increasing the user's inhalation resistance, resulting in a poor user experience. Therefore, in this embodiment, if the cross-sectional area of ​​the airway is 20 times or more that of the pores, the speed at which the aerosol is released from the inner wall of the airway can be ensured, the inhalation resistance can be reduced, and the user's inhalation experience can be improved.

[0125] In some embodiments, the cross-sectional area of ​​the airway is 20 to 60,000 times that of the pores. If the cross-sectional area of ​​the airway is more than 60,000 times that of the pores, the area of ​​the airway will be too large, resulting in a deterioration in the overall quality of the smoke-generating medium, a low utilization rate of the medium, and a high heating rate, making it easier for aerosols to be released into the environment through the pores.

[0126] For example, the cross-sectional area of ​​the airway is 100 to 40,000 times larger than the cross-sectional area of ​​the micropore.

[0127] Exemplarily, the cross-sectional area of ​​the micropores is 0.7 nm 2 (square nanometer) ~ 710μm 2 (square micrometer). For example, 1 nm 2 , 10nm 2 , 25nm 2 , 30nm 2 , 40nm 2 , 50nm 2 , 60nm 2 , 70nm 2 , 80nm 2 , 100 nm 2 , 200 nm 2 , 300 nm 2 , 400nm 2 , 500nm2 , 600nm 2 , 700nm 2 , 800nm 2 , 900nm 2 , 1 μm 2 , 2 μm 2 , 3 μm 2 And so on.

[0128] The cross-sectional area of ​​the micropores is 0.7 nm 2 If the thickness is less than 710 μm, the effective ingredients inside the medium are less likely to volatilize into the pores 111, reducing the utilization rate of the medium. 2 If the cross-sectional area of ​​the micropores is greater than 0.7 nm, the heat transfer within the micropores will be uneven, resulting in a poor suction experience. 2 ~710μm 2 By controlling the amount of airflow, it is possible to improve the utilization rate of the medium and also improve the suction experience.

[0129] More preferably, the cross-sectional area of ​​the micropores is 1963 nm 2 ~20μm 2 is.

[0130] Exemplarily, the hydraulic diameter of the pores is 10 nm (nanometers) to 30 μm (micrometers), such as 10 nm, 20 nm, 24 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1 μm, 2 μm, 3 μm, etc.

[0131] If the hydraulic diameter of the pores is less than 10 nm, the active ingredient in the medium is less likely to volatilize into the pores 111, resulting in a decrease in the utilization rate of the medium. If the diameter of the pores is greater than 30 μm, the heat transfer within the pores becomes uneven, resulting in a decrease in the inhalation experience. Therefore, in this embodiment, by controlling the hydraulic diameter of the pores to 0.1 nm to 30 μm, the utilization rate of the medium and the inhalation experience can be improved.

[0132] 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.

[0133] The above is only a preferred embodiment of the present application, and does not limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should all be included in the protection scope of the present application.

Claims

1. 1. An aerosol-generating substrate, comprising: The aerosol-generating substrate has pores of at least two different cross-sectional shapes, the pores are provided inside the aerosol-generating substrate, and the pores penetrate at least one end along the length of the aerosol-generating substrate.

2. the pores penetrate through opposite ends of the aerosol-generating substrate along its length, the aerosol-generating substrate is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, a first set of pores is disposed in the middle portion, and a second set of pores is disposed in the edge portion, the pores in the first set have the same cross-sectional shape, and at least one pore in the second set has a cross-sectional shape different from the cross-sectional shape of the pores in the first set; 2. The aerosol-generating substrate of claim 1.

3. the cross-sectional shape of the first set of pores is circular, and the cross-sectional shape of each pore of the second set is a subset of the cross-sectional shape of the pores of the first set; 3. The aerosol-generating substrate of claim 2.

4. the cross-sectional shape of the first set of pores is a regular hexagon, and the cross-sectional shape of each of the second set of pores is a portion of the cross-sectional shape of the first set of pores; 3. The aerosol-generating substrate of claim 2.

5. the cross-sectional shape of the first set of pores is diamond-shaped, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pore of the first set; 3. The aerosol-generating substrate of claim 2.

6. the cross-sectional shape of the first set of pores is a regular square, and the cross-sectional shape of each of the second set of pores is a portion of the cross-sectional shape of the first set of pores; 3. The aerosol-generating substrate of claim 2.

7. All the pores of the first group are divided into a plurality of pore units, and a plurality of pores of the pore unit are arranged along a first direction, and a plurality of the pore units are arranged along a second direction, and the first direction and the second direction intersect; 3. The aerosol-generating substrate of claim 2.

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

8. The aerosol-generating substrate of claim 7.

9. The plurality of pores of the pore unit are arranged circumferentially along a first direction, and the plurality of pore units are arranged by being sequentially fitted together along a second direction.

8. The aerosol-generating substrate of claim 7.

10. At least one of the pores has a cross-sectional shape of a first type and at least one of the pores has a cross-sectional shape of a second type.

2. The aerosol-generating substrate of claim 1.

11. A portion of the first type of shape is the same as the second type of shape.

11. The aerosol-generating substrate of claim 10.

12. the number of pores having the first shape and the number of pores having the second shape are both plural, and each pore having the second shape is surrounded by at least two pores having the first shape; 11. The aerosol-generating substrate of claim 10.

13. the first type of pores and the second type of pores are each a plurality of pores, all the pores of the first shape are divided into a plurality of first row groups, the plurality of pores in each of the first row groups are linearly arranged along a first direction, and the plurality of first row groups are linearly arranged along a second direction; all the pores of the second shape are divided into a plurality of second row groups, the plurality of pores in each of the second row groups are linearly arranged along the first direction, and the plurality of second row groups are linearly arranged along the second direction; the pores of the first shape and the pores of the second shape are alternately arranged in a first direction, and the pores of the first shape and the pores of the second shape are alternately arranged in a second direction; 11. The aerosol-generating substrate of claim 10.

14. a pore having a cross-sectional shape of a third type is provided on the center line of the aerosol-generating substrate; 11. The aerosol-generating substrate of claim 10.

15. the number of pores of the first shape and the number of pores of the second shape are each four, the four pores of the first shape are respectively arranged symmetrically along two straight lines that pass through the pores of the third shape and are perpendicular to each other, and one pore of the second shape is provided between two adjacent pores of the first shape; 15. The aerosol-generating substrate of claim 14.

16. the hydraulic diameter of the pores is between 0.05 mm and 6 mm; and / or The cross-sectional area of ​​the pore is 0.0019 mm ２ ~30mm ２ That is, 2. The aerosol-generating substrate of claim 1.

17. The aerosol-generating substrate has a circular cross-sectional shape. An aerosol-forming substrate according to any one of claims 1 to 16.

18. the aerosol-generating substrate has a plurality of micropores, the micropores communicating with each other and with the pores; An aerosol-forming substrate according to any one of claims 1 to 16.

19. the aerosol-generating substrate includes a groove provided on a circumferential surface of the aerosol-generating substrate, the groove penetrating at least one end of the aerosol-generating substrate along a longitudinal direction thereof; An aerosol-forming substrate according to any one of claims 1 to 16.

20. 1. An aerosol-generating product comprising: An aerosol-forming substrate according to any one of claims 1 to 19; a functional segment provided at one end of the aerosol-generating substrate along its length, the functional segment including a filter segment for filtering the aerosol; an outer layer that surrounds the outer periphery of the functional segment and the outer periphery of the aerosol-generating substrate.

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

21. The aerosol-generating product of claim 20.

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