Aerosol-forming substrates and aerosol-forming products

Abstract

The present application provides an aerosol-generating substrate and an aerosol-generating product, wherein the aerosol-generating substrate has at least one airway penetrating at least one end along the length of the aerosol-generating substrate, and the airway has a wall thickness ranging from 0.1 mm to 9.8 mm. The aerosol-generating substrate of the present application can improve the user experience.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on and claims priority to a Chinese patent application bearing application number 202310091250.X, filed with the China Patent Office on January 20, 2023, the entire contents of which are incorporated herein by reference.

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

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

[0004] In the prior art, when inhaling smoke-generating 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 embodiment of the present application aims to provide an aerosol-generating substrate and an aerosol-generating product that can improve the user's experience.

[0006] To achieve the above object, an embodiment of the present application provides an aerosol-generating substrate, the aerosol-generating substrate having at least one airway penetrating at least one end along the length of the aerosol-generating substrate, and the wall thickness of the airway ranging from 0.1 mm to 9.8 mm.

[0007] In one embodiment, the airways penetrate opposite ends of the length of the aerosol-forming substrate.

[0008] In one embodiment, the airway wall thickness ranges from 0.15 mm to 3.5 mm.

[0009] In one embodiment, the number of the airways is plural, and the wall thickness of the airways includes a wall thickness D of the medium wall between two adjacent airways, and D is in the range of 0.1 mm to 2.5 mm.

[0010] In one embodiment, the wall thickness of the airway includes the wall thickness L of the medium wall between the outermost airway and the outer wall of the aerosol-generating substrate, and L is in the range of 0.1 mm to 3.5 mm.

[0011] In one embodiment, the airway is provided in at least one of the interior of the aerosol-generating substrate and the outer wall of the aerosol-generating substrate.

[0012] In one embodiment, the airway has a cross-section perpendicular to the longitudinal direction of the aerosol-generating substrate, and the cross-sectional shape of the airway provided within the aerosol-generating substrate is one of a circle, an ellipse, a track, a polygon, and an irregular shape.

[0013] In one embodiment, the cross-sectional shape of the airway provided in the outer wall of the aerosol-generating substrate is one of a semicircular, semi-elliptical, trapezoidal, polygonal, and irregular shape, or the cross-sectional shape of the airway provided in the outer wall of the aerosol-generating substrate is the same as the local shape of the cross-sectional shape of the airway provided inside the aerosol-generating substrate.

[0014] In one embodiment, the airway has a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate, and the cross-sectional area of ​​the airway provided inside the aerosol-generating substrate is 0.0019 mm 2 ~30mm 2 is.

[0015] In one embodiment, the cross-sectional area of ​​the airway in the outer wall of the aerosol-generating substrate is less than 0.001 mm 2 ~55mm 2 is.

[0016] In one embodiment, the aerosol-generating substrate has a plurality of airways within it, all of which are distributed along a plurality of trajectory lines, wherein each of the airways on a single trajectory line is linearly arranged along the first direction, and the plurality of trajectory lines are arranged along a second direction, and the first direction and the second direction are not parallel.

[0017] In one embodiment, the airways are uniformly distributed on the multiple trajectory lines.

[0018] In one embodiment, the airways on a single trajectory line are arranged linearly along the first direction, and multiple trajectory lines are arranged along the second direction perpendicular to the first direction.

[0019] In one embodiment, each of the airways on a single trajectory line is arranged circumferentially around the center of the aerosol-generating substrate, and multiple trajectory lines are arranged concentrically along the radial direction of the aerosol-generating substrate.

[0020] In one embodiment, the airways on a single trajectory line are arranged in an overlapping arrangement, and the pore size of the airways on each trajectory line gradually increases or decreases radially outward along the aerosol-generating substrate.

[0021] In one embodiment, the airways on a single trajectory line are arranged in an overlapping arrangement, and the spacing between the airways on two adjacent trajectory lines gradually increases or decreases radially outward along the aerosol-generating substrate.

[0022] In one embodiment, the aerosol-generating substrate has a plurality of airways within it, the airways being randomly distributed.

[0023] In one embodiment, a plurality of the airways are provided inside the aerosol-generating substrate, and each of the airways is distributed in a different region inside the aerosol-generating substrate.

[0024] In one embodiment, the aerosol-generating substrate has a first region and a second region therein, and all of the airways are distributed within the first region.

[0025] Examples 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 outer coating layer circumferentially surrounding the functional segment and the aerosol-generating substrate.

[0026] 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.

[0027] Examples of the present application provide an aerosol-generating substrate and an aerosol-generating product, wherein the aerosol-generating substrate has at least one airway penetrating at least one end along the length of the aerosol-generating substrate, and the wall thickness of the airway ranges from 0.1 mm to 9.8 mm. 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 pores in the medium wall between the airways, collects in the airways, and is transported to the suction end by the action of negative suction pressure. In other words, the provision of the airway increases the surface area of ​​the aerosol-generating substrate (the sidewall of the airway corresponds to part of the surface of the aerosol-generating substrate). This allows the heat of the aerosol-generating substrate to enter the aerosol-generating substrate from its surface, improving heating efficiency compared to related art structures that use direct conduction within the aerosol-generating substrate. Furthermore, by setting the wall thickness of the airway to 0.1 mm to 9.8 mm, the flow resistance of the aerosol-generating substrate is relatively small and the aerosol flow rate is appropriate, so that the aerosol inside the aerosol-generating substrate is easily extracted, the aerosol is released more uniformly, the utilization rate is high, and the aerosol-generating substrate is less likely to burn, resulting in a relatively high user experience and convenience in processing and manufacturing. In other words, compared with the smoke-emitting segment materials in the related art, the aerosol-generating substrate of the embodiment of the present application can improve the user experience. [Brief explanation of the drawings]

[0028] [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 in an embodiment of the present application. [Figure 5] FIG. 1 is a schematic structural diagram of a second type of aerosol-generating substrate in an embodiment of the present application. [Figure 6]FIG. 1 is a schematic structural diagram of a third type of aerosol-generating substrate in an embodiment of the present application. [Figure 7] FIG. 1 is a schematic structural diagram of a fourth type of aerosol-generating substrate in an embodiment of the present application. [Figure 8] FIG. 1 is a schematic structural diagram of a fifth type of aerosol-generating substrate in an embodiment of the present application. [Figure 9] 1 is a schematic diagram of the structure of a sixth type of aerosol-generating substrate in an embodiment of the present application. [Figure 10] FIG. 1 is a schematic structural diagram of a seventh type of aerosol-generating substrate in an embodiment of the present application. [Figure 11] FIG. 1 is a schematic structural diagram of the eighth type of aerosol-generating substrate in an embodiment of the present application. [Figure 12] FIG. 1 is a schematic structural diagram of the ninth 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 tenth type of aerosol-generating substrate in the examples of the present application. [Figure 14] FIG. 11 is a structural schematic diagram of an eleventh type of aerosol-generating substrate according to an embodiment of the present application. [Figure 15] FIG. 1 is a schematic diagram of the structure of the 12th type of aerosol-generating substrate in an example of the present application. [Figure 16] FIG. 12 is a structural schematic diagram of the thirteenth 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 14th type of aerosol-generating substrate in the examples of the present application. [Figure 18] FIG. 1 is a structural schematic diagram of the 15th type of aerosol-generating substrate in an example of the present application. [Figure 19] FIG. 1 is a schematic diagram of the structure of the 16th type of aerosol-generating substrate in an example of the present application. [Figure 20] FIG. 1 is a schematic diagram of the structure of the 17th type of aerosol-generating substrate in an example of the present application. [Figure 21] FIG. 1 is a schematic diagram of the structure of the 18th type of aerosol-generating substrate in an example of the present application. [Figure 22] FIG. 1 is a structural schematic diagram of the 19th type of aerosol-generating substrate in an example of the present application. [Figure 23]FIG. 1 is a structural schematic diagram of the 20th type of aerosol-generating substrate in an example of the present application. [Figure 24] FIG. 1 is a structural schematic diagram of the 21st type of aerosol-generating substrate in an example of the present application. [Figure 25] FIG. 1 is a schematic diagram of the structure of the 22nd type of aerosol-generating substrate in an example of the present application. [Figure 26] FIG. 1 is a structural schematic diagram of the 23rd type of aerosol-generating substrate in an example of the present application. [Figure 27] FIG. 1 is a schematic diagram of the structure of the 24th type of aerosol-generating substrate in an example of the present application. [Figure 28] FIG. 1 is a structural schematic diagram of the 25th type of aerosol-generating substrate in an example of the present application. [Figure 29] FIG. 1 is a schematic diagram of the structure of the 26th type of aerosol-generating substrate in an example of the present application. [Figure 30] FIG. 2 is a cross-sectional view of a third type of aerosol-generating product according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0029] It should be noted that, unless inconsistent, the examples in this application and the technical features in the examples 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] 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 outer coating 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.

[0031] The outer coating layer 30 surrounds the functional segments 20 and the aerosol-generating substrate 10 from the outside.

[0032] The aerosol-generating product 100 is used in combination with an electronic atomization device having a heating assembly, specifically, the heating assembly heats and atomizes the aerosol-generating substrate 10 to generate an aerosol, which is then inhaled by the user after being filtered by the filter segment of the functional segment 20.

[0033] 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.

[0034] The aerosol-generating product of the embodiment of the present application may be adapted for inhalation by a heating and combustion method or by a heating and non-combustion method. In the embodiment of the present application, the aerosol-generating product 100 is described as being adapted for inhalation by a heating and non-combustion method.

[0035] 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.

[0036] 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 reduction segment 22 as shown in Figure 30. In the case of a functional segment 20 provided with a temperature reduction segment 22, the temperature reduction 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.

[0037] Here, the temperature reduction segment is used to perform a temperature reduction process on the aerosol before the filter segment filters the aerosol, thereby reducing the temperature of the aerosol and improving the phenomenon of the "mouth feeling hot" when the user inhales the aerosol.

[0038] 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 a smoking device or when a heating element is inserted into the aerosol-generating substrate 10, the support segment applies a counter force to the aerosol-generating substrate 10, thereby preventing axial movement of the aerosol-generating substrate 10.

[0039] Another embodiment of the present application further provides an aerosol-generating substrate 10 for use in an aerosol-generating product 100 described in the embodiment of the present application. Referring to Figures 1 to 25, the aerosol-generating substrate 10 has at least one airway 10a, which penetrates at least one end of the aerosol-generating substrate 10 along its length, i.e., the airway 10a extends in the longitudinal direction of the aerosol-generating substrate 10.

[0040] In some embodiments, referring to Figure 28, the airways 10a extend through the same end along the length of the aerosol-generating substrate 10, with all other ends being closed.

[0041] In some other embodiments, referring to Figure 29, some airways 10a penetrate one end of the aerosol-generating substrate 10 along its length, and some other airways 10a penetrate the other end of the aerosol-generating substrate 10 along its length.

[0042] 2 to 7, in some other embodiments, each of the airways 10a passes through both ends of the aerosol-generating substrate 10 along its length. It can be appreciated that having the airways 10a pass through both ends of the aerosol-generating substrate 10 along its length is more advantageous in reducing the resistance to inhalation for the user than having the airways 10a pass through only one end of the aerosol-generating substrate 10 along its length.

[0043] The pore walls of the airways 10a constitute the surface of the aerosol-generating substrate 10, and the airways 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 pores, collects in the airways 10a, and is transported to the suction end by the action of negative suction pressure, thereby reducing the user's resistance to inhalation and improving the user experience. Note that resistance to inhalation is positively correlated with the flow resistance of the aerosol. The smaller the flow resistance the aerosol experiences within the aerosol-generating substrate 10, the smaller the resistance to inhalation experienced by the user. Conversely, the greater the flow resistance the aerosol experiences within the aerosol-generating substrate 10, the greater the resistance to inhalation experienced by the user.

[0044] 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.

[0045] Here, the aerosol-generating substrate 10 is, for example, a reconstituted tobacco medium containing ingredients such as a smoke-generating agent 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 has threads that fall off or is difficult to clean.

[0046] The aerosol-generating substrate 10 may be formed by a process such as compression or extrusion.

[0047] Furthermore, pores are formed between the particles of the particle aggregate, and the pores are connected to form micro-airways that communicate with the airways 10a. The airways 10a penetrate both ends of the medium, allowing air to enter uniformly and collecting and transmitting aerosols. The reconstituted tobacco medium, which contains ingredients such as smoke-generating agents and tobacco, receives heat and releases aerosols. The aerosols are collected in the airways 10a through the gaps or pores between the wall materials and transported to the suction end by the action of negative suction pressure.

[0048] The wall thickness of the airways 10a ranges from 0.1 mm to 9.8 mm. When there is only one airway 10a, as shown in Figures 4 to 6, the wall thickness of the airway 10a can be the thickness of the medium wall between the airway 10a and the outer wall of the aerosol-generating substrate 10. When there are multiple airways 10a, as shown in Figure 7, the wall thickness of the airways 10a can be the thickness of the medium wall between the pore wall of the airway 10a and the outer wall of the aerosol-generating substrate 10, and the thickness of the medium wall between two adjacent airways 10a. By combining different medium wall thicknesses, it is possible to adjust and control the inhalation resistance, active ingredient release rate, heat transfer coefficient, and inhalation uniformity of the aerosol-generating substrate 10.

[0049] In the examples of the present application, the wall thickness range of the airway 10a is 0.1 mm to 9.8 mm. The thicker the medium wall, the greater the mass of the aerosol-generating substrate 10 and the greater the number of inhalations, but the greater the suction resistance of the entire aerosol-generating substrate 10 and the lower the heat transfer efficiency, which is unfavorable for aerosol release and may cause the contact surface with the heat source to overheat. On the other hand, the thinner the medium wall, the more favorable it is for heat penetration or diffusion and the higher the heat transfer efficiency, but the smaller the mass of the aerosol-generating substrate 10 and the fewer inhalations, and if the medium wall is too thin, the structural strength of the entire aerosol-generating substrate 10 will be reduced. In other words, the setting of the wall thickness of the airway 10a needs to be coordinated and unified with the aerosol emission amount, heat transfer efficiency, and the structural strength of the entire aerosol-generating substrate 10. Thus, when the wall thickness range of the airway 10a is 0.1 mm to 9.8 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 emission is more uniform and the utilization rate is higher, and the aerosol-generating substrate 10 is less likely to burn, resulting in a relatively better user experience and convenience in processing and manufacturing.

[0050] If the thickness of the medium wall is less than 0.1 mm, the mass of the aerosol-generating substrate 10 is small, the aerosol release time is short, the support of the aerosol-generating substrate 10 is poor, and the yield rate of the aerosol-generating substrate 10 is low.If the thickness of the medium wall exceeds 9.8 mm, the mass of the aerosol-generating substrate 10 is large, which is unfavorable for aerosol release, and the suction resistance of the entire aerosol-generating substrate 10 is large, resulting in a poor user experience.Therefore, it is appropriate to set the wall thickness of the airway 10a in the range of 0.1 mm to 9.8 mm.

[0051] Preferably, the wall thickness of the airway 10a ranges from 0.15 mm to 3.5 mm.

[0052] The outer coating layer 30 surrounds the outer circumferential surface of the functional segment 20 and the aerosol-generating substrate 10 .

[0053] The material of the outer coating 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.

[0054] In some embodiments, referring to Figure 2, the functional segment 20 includes only the filter segment 21. In other embodiments, referring to Figure 20, 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.

[0055] Here, the temperature reduction segment 22 is used to perform a temperature reduction process on the aerosol before the filter segment 21 filters the aerosol, thereby lowering the temperature of the aerosol and improving the phenomenon of the "mouth feeling hot" when the user inhales the aerosol.

[0056] Materials for the temperature reduction 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.

[0057] 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.

[0058] The temperature reduction segment 22 and the filter segment may be made of the same or different materials.

[0059] 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.

[0060] The specific components of the aerosol-generating substrate 10 are not limited herein, and by way of example, in one embodiment, the aerosol-generating substrate 10 may include a botanical component, an adjuvant component, a smoke-generating agent component, an adhesive component, etc.

[0061] 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.

[0062] 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. At the same time, the inorganic fillers also have pores, which can increase the porosity of the wall material after the plant components are molded, thereby improving the aerosol release rate.

[0063] 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.

[0064] 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.

[0065] In one embodiment, the function of the smoke generant component is to generate a large amount of vapor upon heating, thereby improving the aerosol yield of the smoke-generating product. The smoke generant may, for example, include one or more combinations of monohydric alcohols (e.g., menthol), polyhydric alcohols (e.g., propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin), esters of polyhydric alcohols (e.g., monoacetin, diacetin, triacetin), monocarboxylic acids, polycarboxylic acids (e.g., lauric acid, myristic acid), or aliphatic esters of polycarboxylic acids (e.g., dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, mesoerythritol, diacetin mixtures, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0066] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from natural plants, such as 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 10, is harmless to the human body, and has certain health benefits.

[0067] In some embodiments, referring to Figure 18, the airways 10a extend through the same end along the length of the aerosol-generating substrate 10, with all other ends being closed.

[0068] In some other embodiments, referring to Figure 19, some airways 10a penetrate one end of the aerosol-generating substrate 10 along its length, and some other airways 10a penetrate the other end of the aerosol-generating substrate 10 along its length.

[0069] 4 to 13, in some other embodiments, each of the airways 10a passes through both ends of the aerosol-generating substrate 10 along its length. It can be understood that passing through both ends of the aerosol-generating substrate 10 along its length is more advantageous than passing through only one end of the aerosol-generating substrate 10 along its length, as this reduces the resistance to inhalation for the user.

[0070] 4 to 13, the aerosol-generating substrate 10 is cylindrical, i.e., the cross-sectional profile 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 outer shape of the cylindrical aerosol-generating substrate 10 can reduce the difficulty of the manufacturing process.

[0071] The number of airways 10a is not limited and may be one, two, or more than two.

[0072] For example, referring to FIG. 7, there are a plurality of airways 10a, and the thickness of the medium wall between two adjacent airways 10a is D, which is in the range of 0.1 mm to 2.5 mm.

[0073] If D is less than 0.1 mm, the mass of the aerosol-generating substrate 10 is relatively small, the aerosol release time is short, the aerosol-generating substrate 10 is likely to burn, and the aerosol-generating substrate 10 is likely to experience uneven aerosol release during the heating process (e.g., a large amount of aerosol is released in the first two puffs and a small amount in the subsequent puffs), which affects the user's smoking experience.In addition, the aerosol-generating substrate 10 has poor supportability, resulting in a low yield rate during the processing of the aerosol-generating substrate 10.

[0074] If D is greater than 2.5 mm, the mass of the aerosol-generating substrate 10 will be relatively large, causing the aerosol-generating substrate 10 to heat up slowly, which will be unfavorable for aerosol release and affect the user's inhalation experience. Therefore, in this embodiment, the wall thickness of the medium between two adjacent airways 10a should preferably be set to a range of 0.1 mm to 2.5 mm.

[0075] Preferably, the thickness of the medium wall between two adjacent airways 10a is in the range of 0.1 mm to 1.5 mm.

[0076] For example, referring to Figures 4 to 6, the wall thickness between the airway 10a and the outer wall of the aerosol-generating substrate 10 is L, i.e., the wall thickness of the medium wall between the inner wall of the airway 10a and the outer wall of the aerosol-generating substrate 10 is L, and the range of L is 0.1 mm to 3.5 mm.

[0077] If L is less than 0.1 mm, the mass of the aerosol-generating substrate 10 is relatively small, the aerosol release time is short, the aerosol-generating substrate 10 is likely to burn, and the aerosol-generating substrate 10 is likely to experience 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 during the subsequent puffs), which affects the user's smoking experience.In addition, the aerosol-generating substrate 10 has poor supportability, resulting in a low yield rate during the processing of the aerosol-generating substrate 10.

[0078] If L is greater than 3.5 mm, the mass of the aerosol-generating substrate 10 will be relatively large, causing the aerosol-generating substrate 10 to heat up slowly, which will be unfavorable for aerosol release and affect the user's inhalation experience. Therefore, in this embodiment, the wall thickness of the medium between two adjacent airways 10a should preferably be set to a range of 0.1 mm to 3.5 mm.

[0079] Preferably, the thickness of the medium wall between the pore wall of the airway 10a and the outer wall of the aerosol-generating substrate 10 ranges from 0.15 mm to 1.5 mm.

[0080] In one embodiment, referring to FIGS. 1 to 27, an airway 10a is provided in at least one of the interior of the aerosol-generating substrate 10 and the outer wall of the aerosol-generating substrate 10.

[0081] 4 to 18, as shown in Figures 4 to 18, the airways 10a can be provided only inside the aerosol-generating substrate 10, that is, the entrance and exit of the airways 10a can be seen from both ends of the aerosol-generating substrate 10 facing each other in the longitudinal direction, but the airways 10a cannot be seen from the side of the aerosol-generating substrate 10. This corresponds to providing hole-like airways 10a inside the aerosol-generating substrate 10.

[0082] Of course, the airways 10a can be provided only on the outer wall of the aerosol-generating substrate 10, i.e., a portion of the outer wall of the aerosol-generating substrate 10 is recessed to form the airways 10a, which corresponds to groove-like airways 10a being visible from the outer wall of the aerosol-generating substrate 10, and the groove-like airways 10a, together with the outer coating layer 30, form an airflow passage located outside the aerosol-generating substrate 10 (see Figure 3).

[0083] 19 to 21, as shown in FIGS. 19 to 21, airways 10a can be simultaneously provided inside the aerosol-generating substrate 10 and on the outer wall of the aerosol-generating substrate 10, respectively.

[0084] A cross section of the airway 10a perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is the transverse cross section of the airway 10a, and the shape of the transverse cross section of the airway 10a provided inside the aerosol-generating substrate 10 is not limited. For example, the shape of the transverse cross section of the airway 10a provided inside the aerosol-generating substrate 10 may be a circle as shown in Figure 7, a triangle as shown in Figures 10 and 14, a square as shown in Figures 8 and 13, a regular pentagon as shown in Figure 11, a regular hexagon as shown in Figure 12, a diamond as shown in Figure 9, or an ellipse, a track shape, or an irregular shape.

[0085] 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.

[0086] Similarly, the cross-sectional shape of the airway 10a provided in the outer wall of the aerosol-generating substrate 10 is not limited, and for example, in some embodiments, the cross-sectional shape of the airway 10a provided in the outer wall of the aerosol-generating substrate 10 may be semicircular as shown in the drawings, or may be semi-elliptical, polygonal, or irregular, etc.

[0087] In some other embodiments, the cross-sectional shape of the airways 10a on the outer wall of the aerosol-generating substrate 10 is the same as the local cross-sectional shape of the airways 10a inside the aerosol-generating substrate 10. During the molding process, the grooves of the airways 10a can be molded based on the same mold for the airways 10a, which simplifies the mold design, reduces mold costs, and reduces production costs.

[0088] 22 to 25, in some embodiments, the cross-sectional shape of at least some of the airways 10a located at the outermost part of the interior of the aerosol-generating substrate 10 is the same as the local cross-sectional shape of the airways 10a located on the inner side of the interior of the aerosol-generating substrate 10. That is, the cross-sectional shape of at least some of the outermost airways 10a located away from the center of the aerosol-generating substrate 10 along the radial direction of the aerosol-generating substrate 10 is the same as the local cross-sectional shape of the other airways 10a located within the aerosol-generating substrate 10. During the molding process, the grooves of the airways 10a can be molded using the same mold for the airways 10a, which simplifies the mold design, reduces mold costs, and cuts production costs. In one specific example, referring to Figure 25, along the radial direction of the aerosol-generating substrate 10, the cross-sections of the airways 10a other than the outermost airway 10a are regular hexagonal holes arranged and distributed in a honeycomb pattern, and are manufactured using an extrusion die, so that the edge die and the circumferential die work together to form the cross-section of the airway 10a located at the outermost part of the inside of the aerosol-generating substrate 10, and the shape of the cross-section of the outermost airway 10a is a part of a regular hexagonal hole, and the shape is similar to a trapezoid, and the side of the shape closer to the outer wall of the aerosol-generating substrate 10 is an arc.

[0089] Furthermore, when multiple airways 10a are provided inside the aerosol-generating substrate 10, the cross-sectional shapes of each airway 10a may be completely identical, or at least two of the airways 10a may have different cross-sectional shapes, for example, at least one airway 10a may have a circular cross-sectional shape and at least one airway 10a may have a polygonal cross-sectional shape.

[0090] When multiple airways 10a are provided on the outer wall of the aerosol-generating substrate 10, the cross-sectional shapes of each airway 10a may be completely identical, or at least two of the airways 10a may have different cross-sectional shapes, for example, at least one airway 10a may have a semicircular cross-sectional shape and at least one airway 10a may have a polygonal cross-sectional shape.

[0091] By providing the airway 10a inside the aerosol-generating substrate 10, the internal surface area of ​​the aerosol-generating substrate 10 is increased, the heating efficiency is improved, and the user's inhalation experience is enhanced.

[0092] The provision of airways 10a 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, as well as favoring the extraction of active ingredients. Furthermore, when the heating assembly uses ambient heating, this heating method can also be used to adjust the overall heating rate of the aerosol-generating substrate 10, thereby further improving the user's experience.

[0093] By providing airways 10a both inside the aerosol-generating substrate 10 and on the outer wall of the aerosol-generating substrate 10, the internal and external surface areas of the aerosol-generating substrate 10 can be increased simultaneously, and better effects can be achieved compared to providing airways 10a only inside the aerosol-generating substrate 10 or only on the outer wall of the aerosol-generating substrate 10.

[0094] In one embodiment, the cross-sectional area of ​​the airway 10a within the aerosol-generating substrate 10 is 0.0019 mm 2 ~30mm 2 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.

[0095] The cross-sectional area of ​​the airway 10a provided inside the aerosol-generating substrate 10 is 30 mm 2 If the aerosol-generating substrate 10 is heated to a temperature above 100°C, the mass of the aerosol-generating substrate 10 is relatively small, the aerosol emission time is short, the aerosol-generating substrate 10 is likely to burn, and the aerosol-generating substrate 10 is likely to emit uneven aerosol during the heating process (for example, the amount of aerosol emitted is large during the first two puffs and small during the subsequent puffs), which will affect the user's smoking experience.

[0096] The cross-sectional area of ​​the airway 10a provided inside the aerosol-generating substrate 10 is 0.0019 mm 2 If it is less than this, it will be unfavorable for the release of the aerosol, and the overall suction resistance of the aerosol-generating substrate 10 will be large, degrading the user's experience. Furthermore, it will significantly increase the difficulty of the molding process, making it difficult to control the size of the airway 10a, and increasing the reject rate of the aerosol-generating substrate 10.

[0097] It can be understood that the size of the cross-sectional area of ​​the airway 10a has the effect of adjusting the aerosol flow rate and the inhalation resistance. 2 ~30mm 2Within 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 for the aerosol inside the aerosol-generating substrate 10 to be extracted, 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 convenience in processing and manufacturing.

[0098] Preferably, the cross-sectional area of ​​the airway 10a provided within the aerosol-generating substrate 10 is 0.007 mm 2 ~7.1mm 2 is.

[0099] In one embodiment, the cross-sectional area of ​​the airway 10a in the outer wall of the aerosol-generating substrate 10 is 0.001 mm 2 ~55mm 2 is.

[0100] The cross-sectional area of ​​the airway 10a provided on the outer wall of the aerosol-generating substrate 10 is 55 mm 2 If the aerosol-generating substrate 10 is heated to a temperature above 100°C, the mass of the aerosol-generating substrate 10 is relatively small, the aerosol release time is short, and the aerosol-generating substrate 10 is likely to emit uneven aerosol during the heating process (for example, the first two puffs emit a large amount of aerosol, while the subsequent several puffs emit a small amount of aerosol), which will affect the user's smoking experience and cause inconvenience in processing and manufacturing.

[0101] The cross-sectional area of ​​the airway 10a provided on the outer wall of the aerosol-generating substrate 10 is 0.001 mm 2 If it is less than this, the flow resistance of the aerosol in the external airway 10a is large, which is unfavorable for extracting the aerosol from the outer edge of the aerosol-generating substrate 10, and the utilization rate of the medium is low.

[0102] Preferably, the cross-sectional area of ​​the airway 10a in the outer wall of the aerosol-generating substrate 10 is 0.003 mm 2 ~15mm 2 is.

[0103] In an embodiment in which a plurality of airways 10a are provided inside the aerosol-generating substrate 10, the arrangement of the airways 10a is not limited.

[0104] The airways 10a may be formed in the aerosol-generating substrate 10 in a uniformly distributed manner, or may be formed in the aerosol-generating substrate 10 in a non-uniformly distributed manner.

[0105] Note that the "uniform distribution" of the airways 10a includes distribution of the airways 10a in a matrix or concentric circle, i.e., the arrangement of the airways 10a is uniform. It should be understood that the airways 10a may be non-uniform within the cross-section of the aerosol-generating substrate 10. That is, although the airways 10a are uniformly distributed, they do not divide the entire aerosol-generating substrate 10 uniformly. For example, if the cross-section of the aerosol-generating substrate 10 is circular, the airways 10a distributed in a matrix are not uniformly distributed within the circular cross-section.

[0106] 7 to 21, in one embodiment, the aerosol-generating substrate 10 has a plurality of airways 10a, which may be distributed along a plurality of trajectories. Here, each airway 10a along a single trajectory is linearly arranged along a first direction, and the plurality of trajectories are arranged along a second direction, and the first and second directions are not parallel to each other. The first and second directions form a two-dimensional coordinate system, which can define the arrangement of the airways 10a. In other words, the airways 10a have a specific arrangement rule, which makes it easy to fabricate each airway 10a according to the predetermined arrangement rule during the molding process.

[0107] For example, the airways 10a on a single trajectory line are arranged at equal intervals. "Equal intervals" refers to the equal distance between the centers of the holes of two adjacent airways 10a. This ensures that the shapes and sizes of the partitions between two adjacent airways 10a are approximately the same, thereby improving the uniformity of the aerosol emitted by the aerosol-generating substrate 10 during the heated inhalation process, which is beneficial for the uniformity of aerosol transmission and heat reception, and ultimately improving the user's inhalation experience. In other words, the aerosol-generating substrate of the present application can improve the user's inhalation experience.

[0108] The first direction may be a straight line or a curved line, and the second direction may be a straight line or a curved line.

[0109] For example, each airway 10a on a single trajectory line may be arranged linearly along a first direction, and multiple trajectory lines may be arranged along a second direction perpendicular to the first direction; that is, multiple airways 10a may be arranged in a matrix as shown in Figures 7 and 8, or in a grid as shown in Figure 9.

[0110] For example, referring to Figures 13 and 15 to 18, each airway 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.

[0111] The circumferential direction surrounding the center of the aerosol-generating substrate 10 corresponds to the first direction, and the radial direction of the aerosol-generating substrate 10 corresponds to the second direction; that is, the multiple airways 10a can be arranged in a ring shape.

[0112] Continuing to refer to Figures 7 to 14 and Figures 19 to 21, each airway 10a on multiple trajectory lines can be formed in the aerosol-generating substrate 10 in a uniformly distributed manner, that is, all airways 10a are completely identical, each airway 10a on a single trajectory line is arranged at equal intervals, and the multiple trajectory lines are also arranged at equal intervals.

[0113] The uniform distribution of each airway 10a makes it possible to make the mass per unit volume of the area where multiple trajectory lines are provided on the aerosol-generating substrate 10 relatively uniform, which can effectively improve the uniformity of the aerosol emitted by the aerosol-generating substrate 10 during the heating and suction process and increase the consistency of suction.

[0114] In some other embodiments, the airways 10a on the multiple trajectory lines may be unevenly distributed, and the unevenly distributed airways 10a can be combined with different heating methods to achieve uniform heating of the aerosol-generating substrate 10 and consistency of the aerosol inhaled back and forth.

[0115] In one embodiment, the airways 10a on a single trajectory line are arranged in an overlapping manner, where overlapping refers to the airways 10a in the same row being completely identical. The pore size of the airways 10a on each trajectory line gradually increases outward along the radial direction of the aerosol-generating substrate 10. That is, the pore sizes of the airways 10a on different trajectory lines are different, and the pore size of the airways 10a increases the farther from the center of the aerosol-generating substrate 10. For example, referring to FIG. 15 , taking a plurality of trajectory lines arranged in a circular pattern as an example, the pore size of each airway 10a can gradually increase from the airways 10a on the first trajectory line, which is close to the center of the aerosol-generating substrate 10, to the airways 10a on the last trajectory line, which is farthest from the center of the aerosol-generating substrate 10. Of course, in other embodiments, the airways 10a can be arranged in a matrix, and the pore size of the airways 10a on each trajectory line can gradually increase outward along the radial direction of the aerosol-generating substrate 10.

[0116] In one embodiment, the airways 10a on a single trajectory line are arranged in an overlapping manner, and the spacing between adjacent airways 10a on two adjacent trajectory lines may gradually decrease radially outward of the aerosol-generating substrate 10. In other words, the trajectory lines are not arranged at equal intervals, and the wall thickness of the partition between adjacent airways 10a decreases with increasing distance from the center of the aerosol-generating substrate 10. For example, referring to FIG. 17 , taking a circular arrangement of multiple trajectory lines as an example, the wall thickness of the partition between adjacent airways 10a on two adjacent trajectory lines may gradually decrease from the airways 10a on the first trajectory line, which is close to the center of the aerosol-generating substrate 10, to the airways 10a on the last trajectory line, which is farthest from the center of the aerosol-generating substrate 10. Of course, in other embodiments, the airways 10a may be arranged in a matrix, and the wall thickness of the partition between adjacent airways 10a on two adjacent trajectory lines may decrease radially outward of the aerosol-generating substrate 10.

[0117] In the aerosol-generating substrate 10 in which the pore size of the airways 10a increases the further from the center of the aerosol-generating substrate 10, and in the aerosol-generating substrate 10 in which the spacing between two adjacent rows of airways 10a decreases the further from the center of the aerosol-generating substrate 10, the mass per unit volume of the aerosol-generating substrate 10 increases the closer to the central region of the aerosol-generating substrate 10. When these two types of aerosol-generating substrate 10 are applied to the central heating method, it takes a longer time for heat to be conducted from the inside to the outside, which can delay the time required for the outer wall of the aerosol-generating substrate 10 to be heated, improving the uniformity of the aerosol emitted by the aerosol-generating substrate 10 and increasing the length and number of inhalations while maintaining the consistency of aerosol emission, thereby providing the user with a comfortable inhalation experience.

[0118] In one embodiment, the airways 10a on a single trajectory line are arranged in an overlapping pattern, and the pore size of the airways 10a on each trajectory line may gradually decrease radially outward of the aerosol-generating substrate 10. That is, the pore sizes of the airways 10a on different trajectory lines may be different, and the pore size of the airways 10a may decrease the farther from the center of the aerosol-generating substrate 10. For example, referring to FIG. 16 , taking a plurality of trajectory lines arranged in a circular pattern as an example, the pore size of each airway 10a may gradually decrease from the airways 10a on the first trajectory line, which is close to the center of the aerosol-generating substrate 10, to the airways 10a on the last trajectory line, which is farthest from the center of the aerosol-generating substrate 10. Of course, in other embodiments, the airways 10a may be arranged in a matrix pattern, and the pore size of the airways 10a on each trajectory line may gradually decrease radially outward of the aerosol-generating substrate 10.

[0119] In one embodiment, the airways 10a on a single trajectory line are arranged in an overlapping manner, and the spacing between adjacent airways 10a on two adjacent trajectory lines gradually increases radially outward of the aerosol-generating substrate 10. That is, the airways 10a on multiple trajectory lines are not arranged at equal intervals, and the wall thickness of the partition between the airways 10a on adjacent two trajectory lines increases with distance from the center of the aerosol-generating substrate 10. For example, referring to FIG. 18 , taking multiple trajectory lines arranged in a circular pattern as an example, the wall thickness of the partition between the airways 10a on adjacent two trajectory lines may gradually increase from the airways 10a on the first trajectory line, which is close to the center of the aerosol-generating substrate 10, to the airways 10a on the last trajectory line, which is farthest from the center of the aerosol-generating substrate 10. Of course, in other embodiments, the airways 10a may be arranged in a matrix, and the wall thickness of the partition between the airways 10a on adjacent two trajectory lines may increase radially outward of the aerosol-generating substrate 10.

[0120] In the aerosol-generating substrate 10, the pore size of the airways 10a decreases the further away from the center of the aerosol-generating substrate 10, and in the aerosol-generating substrate 10, the spacing between two adjacent rows of airways 10a increases the further away from the center of the aerosol-generating substrate 10. In both cases, the mass per unit volume of the aerosol-generating substrate 10 increases the closer it is to the outer wall of the aerosol-generating substrate 10. When these two types of aerosol-generating substrate 10 are used in a peripheral heating method, the time required for heat to be conducted from the outside to the inside is longer, thereby delaying the heating time of the central position of the aerosol-generating substrate 10 and improving the uniformity of the aerosol emitted by the aerosol-generating substrate 10, increasing the length / number of inhalations while maintaining the consistency of aerosol emission, and providing the user with a comfortable inhalation experience.

[0121] The manner in which the airways 10a are unevenly distributed on multiple trajectories is not limited to the above four methods, and various adjustments can be made as needed. For example, the spacing between the airways 10a on a single trajectory line can be changed, the cross-sectional shapes of the airways 10a in different rows can be changed, and even the above-mentioned embodiment in which the hole diameter is changed and the embodiment in which the spacing is changed can be combined.

[0122] In some embodiments, the plurality of airways 10a within the aerosol-generating substrate 10 may be randomly distributed. Here, the cross-sectional shapes of each of the randomly distributed plurality of airways 10a may be identical, or at least two of the airways 10a may have different cross-sectional shapes. Similarly, the pore sizes of each of the airways 10a may be identical, or at least two of the airways 10a may have different pore sizes.

[0123] Furthermore, for an aerosol-generating substrate 10 having multiple airways 10a provided therein, whether a method of providing multiple trajectory lines or a method of randomly distributing them is adopted, in one embodiment, referring to Figures 7 to 14, each airway 10a can be distributed in each region inside the aerosol-generating substrate 10, that is, airways 10a are provided in almost all regions inside the aerosol-generating substrate 10, and there are no regions where airways 10a are clearly not provided (Figures 7 to 14 do not take into account small regions near the outer wall of the aerosol-generating substrate 10 where airways 10a are not provided).

[0124] 26 and 27, the aerosol-generating substrate 10 may have a first region 10b and a second region 10c, and the airways 10a may be distributed in the first region 10b. That is, the airways 10a may be provided only in the first region 10b, and the second region 10c may not have any airways 10a. The number and locations of the first region 10b and the second region 10c may be determined as needed and are not particularly limited herein.

[0125] In the description of the present 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 the 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 embodiments of the present application. In the present application, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine different embodiments or examples described in the present application, and features of different embodiments or examples, unless they are mutually inconsistent.

[0126] The above is only a preferred embodiment of the present application, and does not limit the present application, and those skilled in the art can make various modifications and variations 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 comprising at least one airway passing through at least one end of the substrate along its length, the airway having a wall thickness ranging from 0.1 mm to 9.8 mm.

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

3. The airway wall thickness range is 0.15 mm to 3.5 mm.

2. The aerosol-generating substrate of claim 1.

4. The number of the airways is plural, and the wall thickness of the airways includes a wall thickness (D) of the medium wall between two adjacent airways, and the range of D is 0.1 mm to 2.5 mm; and / or the wall thickness of the airway includes the wall thickness (L) of the medium wall between the outermost airway and the outer wall of the aerosol-generating substrate, and L is in the range of 0.1 mm to 3.5 mm; 2. The aerosol-generating substrate of claim 1.

5. the airway is provided in at least one of the interior of the aerosol-generating substrate and the outer wall of the aerosol-generating substrate; 2. The aerosol-generating substrate of claim 1.

6. the airway has a cross-section perpendicular to the length of the aerosol-generating substrate; the cross-sectional shape of the airway within the aerosol-generating substrate is one of a circle, an ellipse, a track, a polygon, and an irregular shape; and / or the cross-sectional shape of the airway provided in the outer wall of the aerosol-generating substrate is one of semicircular, semi-elliptical, trapezoidal, polygonal, and irregular shapes, or the cross-sectional shape of the airway provided in the outer wall of the aerosol-generating substrate is the same as the local shape of the cross-sectional shape of the airway provided inside the aerosol-generating substrate; 6. The aerosol-generating substrate of claim 5.

7. the airway has a cross-section perpendicular to the length of the aerosol-generating substrate; The cross-sectional area of ​​the airway within the aerosol-generating substrate is 0.0019 mm ２ or 30 mm ２ and / or The cross-sectional area of ​​the airway in the outer wall of the aerosol-generating substrate is 0.001 mm ２ or 55 mm ２ That is, 6. The aerosol-generating substrate of claim 5.

8. the aerosol-generating substrate has a plurality of airways within it, all of the airways being distributed on a plurality of trajectory lines, each of the airways on a single trajectory line being linearly arranged along a first direction, and the plurality of trajectory lines being arranged along a second direction, the first direction and the second direction being non-parallel; 2. The aerosol-generating substrate of claim 1.

9. The airways along the plurality of trajectory lines are formed in the aerosol-generating substrate in a uniformly distributed manner.

9. The aerosol-generating substrate of claim 8.

10. The airways on a single trajectory line are linearly arranged along the first direction, and the plurality of trajectory lines are arranged along the second direction perpendicular to the first direction.

9. The aerosol-generating substrate of claim 8.

11. each of the airways on a single trajectory line is arranged along a circumferential direction surrounding the center of the aerosol-generating substrate, and a plurality of trajectory lines are arranged concentrically along a radial direction of the aerosol-generating substrate; 9. The aerosol-generating substrate of claim 8.

12. the airways on each single trajectory line are arranged in an overlapping arrangement, and the pore size of the airways on each trajectory line gradually increases or gradually decreases outward along the radial direction of the aerosol-generating substrate.

11. The aerosol-generating substrate of claim 10.

13. the airways on a single trajectory line are arranged in an overlapping arrangement, and the spacing between the airways on two adjacent trajectory lines gradually increases or decreases radially outward of the aerosol-generating substrate.

11. The aerosol-generating substrate of claim 10.

14. The aerosol-generating substrate has a plurality of airways arranged therein, the airways being randomly distributed.

2. The aerosol-generating substrate of claim 1.

15. a plurality of the airways are provided within the aerosol-generating substrate; each of the airways distributes within a respective region of the aerosol-generating substrate; or The aerosol-generating substrate has a first region and a second region therein, and all of the airways are distributed within the first region.

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 outer coating layer circumferentially surrounding the functional segment and the aerosol-generating substrate;

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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