Aerosol-generating substrate and aerosol-generating product

Abstract

The embodiment of the invention provides an aerosol generating substrate and an aerosol generating product, the aerosol generating substrate is of an integrated structure with at least one air channel, in all the air channels, at least one air channel extends from one end of the aerosol generating substrate in a first direction to the other opposite end of the aerosol generating substrate, and at least one air channel extends from the other end of the aerosol generating substrate in the first direction to the other opposite end of the aerosol generating substrate in the second direction. At least one of the two opposite ends of each air channel in the extending direction is an open end. Wherein the volume density of the aerosol generating substrate is 0.25 g / cm < 3 > to 1.40 g / cm < 3 >; and / or the true density is 1.0 g / cm < 3 > to 1.6 g / cm < 3 >; and / or the porosity is 5%-95%. According to the aerosol generating substrate disclosed by the embodiment of the invention, the smoking experience feeling can be better improved.

Description

Technical Field

[0001] The present application relates to the field of smoke generation technology, and in particular to an aerosol generating substrate and an aerosol generating product. Background Art

[0002] Aerosol generating products generally generate aerosols by heating without burning. Specifically, an aerosol generating matrix is ​​provided in the aerosol generating product. The aerosol generating matrix is ​​heated by an external heat source, such as a heating component on an aerosol generating device, so that it is heated just enough to emit a fragrance. The aerosol generating matrix does not burn, but is loaded with an atomizer. When used, the atomizer is released by heating and the matrix itself is heated to release related substances (the atomizer is not necessary) to form smoke.

[0003] The aerosol generating matrices in the related art mainly include three types: particle type, traditional tobacco type and sheet type. The efficiency of aerosol extraction of these aerosol generating matrices is low, and the smoking experience is relatively poor. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide an aerosol generating substrate and an aerosol generating product that can improve the smoking experience.

[0005] To achieve the above-mentioned object, an embodiment of the present application provides an aerosol generating substrate, wherein the aerosol generating substrate is an integral structure having at least one air channel, wherein at least one of all the air channels extends from one end of the aerosol generating substrate along a first direction to the other opposite end, and at least one of the two opposite ends of each of the air channels along the extension direction is an open end;

[0006] The volume density of the aerosol-generating matrix is ​​0.25 g / cm 3 ~1.40g / cm 3 and / or,

[0007] True density is 1.0g / cm 3 ~1.6g / cm 3 and / or,

[0008] The porosity is 5% to 95%.

[0009] In one embodiment, the bulk density is 0.40 g / cm 3 ~1.10g / cm 3 .

[0010] In one embodiment, the true density is 1.1 g / cm 3 ~1.4g / cm 3 .

[0011] In one embodiment, the porosity is 40% to 75%.

[0012] In one embodiment, two opposite ends of each of the airways along the extension direction are open ends.

[0013] In one embodiment, the airway comprises at least one of a first airway and a second airway, wherein the first airway is located inside the aerosol-generating substrate and the second airway is located outside the aerosol-generating substrate.

[0014] In one embodiment, the cross-sectional shape of the first airway is one of circular, elliptical, oval, polygonal and irregular.

[0015] In one embodiment, a plurality of the first air channels are disposed inside the aerosol generating substrate, and among all the first air channels, a cross-sectional area of ​​at least one of the first air channels is different from a cross-sectional area of ​​the other first air channels.

[0016] In one embodiment, a plurality of the first air channels are disposed inside the aerosol generating substrate, and among all the first air channels, a cross-sectional shape of at least one of the first air channels is different from the cross-sectional shapes of the other first air channels.

[0017] In one embodiment, the aerosol generating substrate includes a main body and a plurality of protrusions, each of the protrusions is arranged at intervals on the circumference of the main body, and the second air channel is formed at the interval between two adjacent protrusions.

[0018] In one embodiment, a portion of the outer surface of the aerosol-generating substrate is recessed to form the second air channel.

[0019] In one embodiment, the cross-sectional shape of the second airway is one of semicircular, semi-elliptical, polygonal and irregular.

[0020] In one embodiment, the aerosol generating substrate is in a spiral shape with multiple turns, and two adjacent turns of the aerosol generating substrate are spaced apart so that the second air channel is formed at the spaced apart positions.

[0021] In one embodiment, the interior of the aerosol generating substrate has a plurality of the first air channels extending from one end of the aerosol generating substrate along the first direction to the other opposite end;

[0022] Multiple first airways are arranged to form multiple trajectory lines, wherein each of the first airways in a single trajectory line is linearly arranged along a second direction, and multiple trajectory lines are arranged along a third direction, wherein the second direction and the third direction intersect, and the plane where the second direction and the third direction are located is perpendicular to the first direction.

[0023] In one embodiment, the first airways in the plurality of trajectory lines are evenly distributed.

[0024] In one embodiment, each of the first airways in a single trajectory line is arranged in a straight line along the second direction, and a plurality of trajectory lines are arranged along the third direction perpendicular to the second direction.

[0025] In one embodiment, each of the first air channels in a single trajectory line is arranged along a circumferential direction around the center of the aerosol generating substrate, and multiple trajectory lines are arranged along the radial direction of the aerosol generating substrate.

[0026] In one embodiment, the first air channels in a single trajectory are repeatedly arranged, and the cross-sectional area of ​​the first air channels in each trajectory gradually increases or decreases from the center of the aerosol generating substrate to the radially outer side of the aerosol generating substrate.

[0027] In one embodiment, the first air channels in a single trajectory are repeatedly arranged, and the distance between the first air channels in two adjacent trajectory lines gradually increases or decreases from the center of the aerosol generating substrate to the radial outside of the aerosol generating substrate.

[0028] In one embodiment, the interior of the aerosol generating substrate has a plurality of first air channels extending from one end of the aerosol generating substrate to the other opposite end along the first direction, and the first air channels are randomly distributed.

[0029] In one embodiment, the interior of the aerosol generating substrate has a plurality of first air channels extending from one end of the aerosol generating substrate to the other opposite end along the first direction, and each of the first air channels is distributed in each area inside the aerosol generating substrate.

[0030] In one embodiment, the interior of the aerosol generating substrate has a plurality of first air channels extending from one end of the aerosol generating substrate along the first direction to the other opposite end, and the interior of the aerosol generating substrate has a first region and a second region, and each of the first air channels is distributed in the first region.

[0031] In one embodiment, the interior of the aerosol generating substrate has a plurality of the first air channels extending from one end of the aerosol generating substrate along the first direction to the other opposite end;

[0032] The interior of the aerosol generating matrix has a third area and a fourth area surrounding the outer periphery of the third area, a portion of the first air channels are distributed in the third area, and another portion of the first air channels are distributed in the fourth area, wherein the cross-sectional shape and cross-sectional area of ​​each of the first air channels located in the third area are the same, and the cross-sectional shape of at least one of the first air channels located in the fourth area is a portion of the cross-sectional shape of the first air channel located in the third area.

[0033] In one embodiment, the airway is a straight airway extending along a straight line.

[0034] In one embodiment, the airway is a spiral airway, and at least a portion of the spiral airway along the extension direction is in a curved shape with a curvature that is not zero.

[0035] In one embodiment, the cross-sectional shape of the aerosol generating substrate perpendicular to the first direction is one of circular, elliptical, oval, polygonal and irregular.

[0036] In one embodiment, the aerosol generating substrate is columnar, and the first direction is the elongation direction of the aerosol generating substrate.

[0037] Another embodiment of the present application provides an aerosol generating article, comprising:

[0038] The aerosol-generating substrate described above;

[0039] A functional segment disposed at one end of the aerosol generating substrate along the first direction, the functional segment comprising at least a temperature reduction segment;

[0040] An outer wrapping layer wraps around the functional segment and the outer peripheral side of the aerosol generating substrate.

[0041] In one embodiment, the functional section further includes a filtering section, and the cooling section is located between the filtering section and the aerosol generating substrate.

[0042] The embodiment of the present application provides an aerosol generating substrate and an aerosol generating product, wherein the aerosol generating substrate is an integral structure having at least one airway, and at least one of all the airways extends from one end of the aerosol generating substrate along a first direction to the other opposite end, and at least one of the two opposite ends of each of the airways along the extension direction is an open end. The volume density of the aerosol generating substrate is 0.25 g / cm 3 ~1.40g / cm 3 ; and / or, true density is 1.0 g / cm 3 ~1.6g / cm 3; and / or, the porosity is 5% to 95%. The mass of the aerosol generating matrix is ​​moderate, and during the heating process, the heating rate of the aerosol generating matrix can be effectively increased, so that the aerosol can be released quickly and evenly. At the same time, the suction resistance of the aerosol generating matrix can also be maintained within a suitable range, and the aerosol has good fluidity and is not easily diluted by air, thereby better improving the suction experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of the first aerosol generating substrate of an embodiment of the present application;

[0044] Figure 2 This is a schematic structural diagram of a second aerosol generating substrate according to an embodiment of the present application;

[0045] Figure 3 This is a schematic structural diagram of a third aerosol generating substrate according to an embodiment of the present application;

[0046] Figure 4 This is a schematic structural diagram of a fourth aerosol generating substrate according to an embodiment of the present application;

[0047] Figure 5 for Figure 4 A cross-sectional view of the aerosol generating substrate shown;

[0048] Figure 6 is a cross-sectional view of a fifth aerosol generating substrate according to an embodiment of the present application;

[0049] Figure 7 is a cross-sectional view of a sixth aerosol generating substrate according to an embodiment of the present application;

[0050] Figure 8 is a cross-sectional view of a seventh aerosol generating substrate according to an embodiment of the present application;

[0051] Fig. 9 This is a schematic structural diagram of an eighth aerosol generating substrate according to an embodiment of the present application;

[0052] Fig.10 This is a schematic structural diagram of a ninth aerosol generating substrate according to an embodiment of the present application;

[0053] Fig.11 This is a schematic structural diagram of the tenth aerosol generating substrate according to an embodiment of the present application;

[0054] Fig.12 This is a schematic structural diagram of the eleventh aerosol generating substrate according to an embodiment of the present application;

[0055] Fig.13 This is a schematic structural diagram of a twelfth aerosol generating substrate according to an embodiment of the present application;

[0056] Fig.14 This is a schematic structural diagram of the thirteenth aerosol generating substrate according to an embodiment of the present application;

[0057] Fig.15 This is a schematic structural diagram of the fourteenth aerosol generating substrate according to an embodiment of the present application;

[0058] Fig.16 This is a schematic structural diagram of a fifteenth aerosol generating substrate according to an embodiment of the present application;

[0059] Fig.17 This is a schematic structural diagram of the sixteenth aerosol generating substrate according to an embodiment of the present application;

[0060] Fig.18 This is a schematic structural diagram of the seventeenth aerosol generating substrate according to an embodiment of the present application;

[0061] Fig.19 This is a schematic structural diagram of an eighteenth aerosol generating substrate according to an embodiment of the present application;

[0062] Fig. 20 This is a schematic structural diagram of the nineteenth aerosol generating substrate according to an embodiment of the present application;

[0063] Fig.21 This is a schematic structural diagram of the twentieth aerosol generating substrate according to an embodiment of the present application;

[0064] Fig. 22 This is a schematic structural diagram of the twenty-first aerosol generating substrate of an embodiment of the present application;

[0065] Fig.23 This is a schematic structural diagram of the twenty-second aerosol generating substrate according to an embodiment of the present application;

[0066] Fig.24 This is a schematic structural diagram of the twenty-third aerosol generating substrate of an embodiment of the present application;

[0067] Fig.25 This is a schematic structural diagram of the twenty-fourth aerosol generating substrate according to an embodiment of the present application;

[0068] Fig.26 This is a schematic structural diagram of the twenty-fifth aerosol generating substrate according to an embodiment of the present application;

[0069] Fig. 27 This is a schematic structural diagram of the twenty-sixth aerosol generating substrate according to an embodiment of the present application;

[0070] Fig.28 This is a schematic structural diagram of the twenty-seventh aerosol generating substrate according to an embodiment of the present application;

[0071] Fig.29 This is a schematic structural diagram of a first aerosol generating product according to an embodiment of the present application;

[0072] Fig.30 for Fig.29 a cross-sectional view of the aerosol-generating article shown;

[0073] Fig.31 This is a schematic structural diagram of a second aerosol generating product according to an embodiment of the present application.

[0074] Description of Reference Numerals

[0075] 10. Aerosol generating matrix; 10a. Airway; 10a1. First airway; 10a2. Second airway; 10b. First region; 10c. Second region; 10d. Third region; 10e. Fourth region; 11. Main body; 12. Raised portion; 20. Functional section; 21. Cooling section; 22. Filtering section; 30. Outer wrapping layer. DETAILED DESCRIPTION

[0076] An embodiment of the present application provides an aerosol generating product, see Figures 1 to 28 , the aerosol-generating article comprises an aerosol-generating substrate 10.

[0077] The aerosol generating article can be used in conjunction with an aerosol generating device having a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate 10 to generate an aerosol for users to inhale or for use in medicine, beauty, etc.

[0078] There are many heating methods for the heating component. Exemplarily, the heating methods include central heating and peripheral heating. The central heating method refers to the heating component being inserted into the interior of the aerosol generating product to bake and heat the aerosol generating product from the inside out. The peripheral heating method refers to the heating component being arranged at the periphery of the aerosol generating product to bake and heat the aerosol generating product from the outside in. These heating methods may specifically be resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc.

[0079] The specific structure of the aerosol generating substrate 10 is not limited here. For example, in one embodiment, the aerosol generating substrate 10 can be made of an atomizing medium itself, such as a smoke flavoring medium. In other embodiments, the aerosol generating substrate 10 can also include a substrate and an atomizing medium disposed on the substrate. The substrate can be, for example, high temperature resistant carbon fiber. In this way, by providing the substrate, the strength of the aerosol generating substrate 10 can be improved, and the substrate can also withstand a certain degree of high temperature without generating odor.

[0080] The specific components of the aerosol generating matrix 10 are not limited herein. For example, in one embodiment, the aerosol generating matrix 10 may include plant components, auxiliary components, smoke generating agent components, adhesive components, and the like.

[0081] In one embodiment, the plant component is one or more combinations of powders formed by crushing tobacco raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, and aromatic plants. The plant component is the core source of the flavor of the product. Endogenous substances in the plant component, such as nicotine, enter the human blood through atomization, promote the pituitary gland to produce dopamine, and thus obtain physiological satisfaction.

[0082] In one embodiment, the auxiliary agent component can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant component, and the inorganic filler also has micropores, which can increase the porosity of the wall material after the plant component is formed, thereby increasing the aerosol release rate.

[0083] The lubricant includes one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the fluidity of the particles, reduce the friction between the particles, make the overall density of the particle distribution more uniform, and also reduce the pressure required for mold molding and reduce the wear of the mold.

[0084] Emulsifiers include one or more combinations of polyglycerol fatty acid esters, Tween-80, and polyvinyl alcohol. Emulsifiers can slow down the loss of flavor substances during storage to a certain extent, increase the stability of flavor substances, and improve the sensory quality of products. Emulsifiers (also known as surfactants) can reduce the interfacial tension of water-soluble and water-insoluble components in the mixed system, and form a relatively strong film on the surface of the droplets or form a double electric layer on the surface of the droplets due to the charge given by the emulsifier, preventing the droplets from aggregating with each other and maintaining a uniform emulsion. Emulsifying and homogenizing two immiscible components can improve the consistency of product quality.

[0085] The function of the smoke-generating agent component is to generate a large amount of steam when heated, thereby increasing the amount of smoke of the smoking product. In one embodiment, the smoke-generating agent may include, for example: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butylene glycol and glycerol); an ester of a polyhydric alcohol (such as monoacetin, diacetin or triacetin); a monocarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, diacetin mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) or one or more combinations thereof.

[0086] In one embodiment, the adhesive component is a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The adhesive is in close contact with the interface of the product component material by wetting, generating an intermolecular attraction, thereby playing the role of bonding the powder, liquid, etc. of the component material. At the same time, the use of natural plant extracts and non-ionic adhesives can avoid the release of harmful substances such as methanol, formaldehyde, and acrolein caused by colloid modification, thereby improving the safety of the product.

[0087] Please continue reading Figures 1 to 28 The aerosol generating substrate 10 is an integrated structure. For example, the aerosol generating substrate 10 can be a particle combination, and the particle combination is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing components such as a smoke generating agent and tobacco.

[0088] The aerosol generating matrix 10 can be formed into an integral structure by injection molding, compression molding, extrusion, casting, rolling, etc. Extrusion molding refers to a processing method in which a raw material mixture is added to an extruder, and the material is pushed forward by the screw through the action between the extruder barrel and the screw, and continuously passes through the die to form various cross-section products or semi-finished products.

[0089] The aerosol generating matrix 10 is an integrated structure during heating and suction or after stopping heating, and is not prone to disintegration and falling off, thereby solving the problems of the thin sheet, filament or loose particle aerosol generating matrix 10 in the prior art, such as loose sheets, falling of filamentary components and particle components, and difficulty in cleaning.

[0090] Please continue reading Figures 1 to 28 The cross-sectional shape of the aerosol generating substrate 10 perpendicular to the first direction Z1 is not limited. For example, the cross-sectional shape of the aerosol generating substrate 10 perpendicular to the first direction Z1 can be Figure 1The circles, polygons (including but not limited to Fig.18 The triangle shown, Fig.19 The square shown, Fig. 20 hexagons, prisms, trapezoids, etc.), Fig.16 The oval shown, Fig.17 The waisted shape shown, Figure 21 to Figure 24 The special shapes shown in the figure, among which, an oblong circle refers to a closed figure formed by dividing a circle into two semicircular arcs through the center of the circle and translating them in opposite directions, and connecting the endpoints of the two semicircular arcs with two equal parallel lines. Special shapes refer to other symmetrical or asymmetrical shapes other than the shapes listed above, such as snowflake shapes, etc.

[0091] Please continue reading Figures 1 to 28 The aerosol generating substrate 10 has at least one air channel 10a, that is, the number of air channels 10a can be one or more. At least one of the two opposite ends of the air channel 10a along the extension direction is an open end. The open end refers to the end of the air channel 10a that is connected to the outside.

[0092] For example, see Figure 5 , both opposite ends of the airway 10a along the extension direction may be open ends.

[0093] For example, see Figure 6 One of the two opposite ends of the airway 10a along the extension direction may be an open end, and the other end may be a closed end that is not connected to the outside.

[0094] Exemplarily, when a plurality of air channels 10a are provided, both opposite ends of all the air channels 10a along the extension direction may be open ends, or one of the opposite ends of all the air channels 10a along the extension direction may be an open end and the other end may be a closed end, or both opposite ends of a portion of the air channels 10a along the extension direction may be open ends, and one of the opposite ends of another portion of the air channels 10a along the extension direction may be an open end and the other end may be a closed end.

[0095] Please continue reading Figures 1 to 28 Among all the air passages 10a, at least one of the air passages 10a extends from one end of the aerosol generating substrate 10 along the first direction Z1 to the other opposite end.

[0096] The first direction Z1 may be any direction of the aerosol generating substrate 10, for example, see Figure 1The first direction Z1 may be the height direction of the aerosol generating substrate 10. In other embodiments, the first direction Z1 may also be the length direction or the width direction of the aerosol generating substrate 10 (wherein the height direction, the length direction and the width direction are perpendicular to each other. For the aerosol generating substrate 10 having a circular cross-sectional shape perpendicular to the first direction Z1, the length direction and the width direction are equivalent to two perpendicular directions on the circular surface). The first direction Z1 may also be inclined relative to at least two of the length direction, the width direction and the height direction of the aerosol generating substrate 10.

[0097] If the aerosol generating substrate 10 is only provided with one air channel 10a, the air channel 10a needs to extend from one end of the aerosol generating substrate 10 along the first direction Z1 to the other opposite end. If the aerosol generating substrate 10 is provided with multiple air channels 10a, all of the air channels 10a may extend from one end of the aerosol generating substrate 10 along the first direction Z1 to the other opposite end, or one or part of the air channels 10a may extend from one end of the aerosol generating substrate 10 along the first direction Z1 to the other opposite end, and the other air channels 10a may extend from one end of the aerosol generating substrate 10 along the other direction to the other opposite end, wherein the other direction refers to any direction that is not parallel to the first direction Z1.

[0098] For example, see Figures 1 to 28 The aerosol generating substrate 10 may be columnar, and the first direction Z1 may be the elongation direction of the aerosol generating substrate 10 .

[0099] In other embodiments, the aerosol-generating substrate 10 may also be in a sheet shape.

[0100] Please continue reading Figures 1 to 28 , the air channel 10a can be arranged inside the aerosol generating substrate 10, or outside the aerosol generating substrate 10. When the number of the air channels 10a is multiple, all the air channels 10a can be arranged inside the aerosol generating substrate 10, or all the air channels 10a can be arranged outside the aerosol generating substrate 10, or part of the air channels 10a can be arranged inside the aerosol generating substrate 10, and the other part of the air channels 10a can be arranged outside the aerosol generating substrate 10. The specific arrangement of the air channels 10a will be described in detail in the following embodiments. It should be noted that the air channel 10a is located inside the aerosol generating substrate 10, which means that the surrounding side of the air channel 10a is surrounded by the matrix material, that is, the inner side of the air channel 10a is all the matrix material, and the cross section of the air channel 10a is a closed shape. The air channel 10a is located outside the aerosol generating substrate 10, which means that one side of the air channel 10a is a gap opened by the matrix medium material and connected to the outside, that is, the cross section of the air channel 10a is a non-closed shape.

[0101] Please continue reading Figure 5 and Fig.15 , the airway 10a may be as follows Figure 5 The straight airway shown is an airway extending along a straight line, or in other words, the extending direction of the straight airway is a straight line.

[0102] The airway 10a may also be Fig.15 The spiral airway shown is an airway in which at least part of the area along the extension direction is in a curved shape with a curvature not equal to 0. For example, along the extension direction of the spiral airway, the spiral airway may have a structure in which there are both a curved segment with a curvature not equal to 0 and a straight segment with a curvature of 0, or may have only a curved segment with a curvature not equal to 0 and no straight segment with a curvature of 0. In other words, from the starting point to the end point of the spiral airway along the extension direction, the spiral airway does not need to extend along a straight line.

[0103] When there are multiple air passages 10 a , some of the air passages 10 a may be straight air passages, and other air passages 10 a may be spiral air passages.

[0104] The airway 10a can extend the airflow path and increase the flow speed of the airflow in the aerosol generating matrix 10, thereby increasing the impact force of the airflow and allowing the aerosol to be evenly mixed, thereby improving the extraction efficiency and uniformity of the aerosol in the aerosol generating matrix 10 and enhancing the user's inhalation experience.

[0105] See also Figure 29 to Figure 31 The aerosol generating article may be provided with a functional segment 20 and an outer wrapping layer 30, wherein the functional segment 20 is provided at one end of the aerosol generating substrate 10 along the first direction, and the functional segment 20 at least includes a cooling segment 21 for reducing the temperature of the aerosol inlet. The outer wrapping layer 30 is wrapped around the outer peripheral side of the functional segment 20 and the aerosol generating substrate 10.

[0106] Functional segment 20 may be as follows Fig.30 As shown, only the cooling section 21 is provided, and it is also possible to Fig.31 The filter section 22 and the cooling section 21 are shown. For the functional section 20 provided with the cooling section 21, the cooling section 21 is arranged between the filter section 22 and the aerosol generating matrix 10, so as to cool the aerosol before the filter section 22 filters the aerosol, so as to reduce the temperature of the aerosol and improve the "burning mouth" phenomenon when the user inhales the aerosol.

[0107] The materials of the cooling section 21 include, but are not limited to, one or more combinations of PE (polyethylene), PLA (Polylacticacid), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), acetate fiber, and acrylic fiber materials.

[0108] The material of the filter section 22 includes, but is not limited to, one or more combinations of PE (polyethylene), PLA (Polylacticacid), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), acetate fiber, and acrylic fiber materials.

[0109] The materials of the cooling section 21 and the filtering section 22 may be the same or different.

[0110] It should be noted that the aerosol generating product relies on the aerosol generating substrate 10 to generate aerosol, and the functional section 20 is not used to generate aerosol.

[0111] The material of the outer wrapping layer 30 is not limited, for example, including but not limited to one or more combinations of fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE, PBAT and the like.

[0112] In some embodiments, the aerosol generating article may also be provided with only the aerosol generating substrate 10 without the functional segment 20 and the outer wrapping layer 30 , or the aerosol generating article may also be provided with the aerosol generating substrate 10 and the outer wrapping layer 30 without the functional segment 20 .

[0113] Furthermore, the volume density of the aerosol generating substrate 10 of the embodiment of the present application can be 0.25 g / cm 3 ~1.40g / cm 3 (including endpoint values), for example, the bulk density can be 0.25 g / cm 3 , 0.40g / cm 3 , 0.60g / cm 3 , 0.80g / cm 3 , 1.10g / cm 3 , 1.20g / cm 3 , 1.40g / cm 3 wait.

[0114] Preferably, the volume density of the aerosol-generating substrate 10 may be 0.40 g / cm 3 ~1.10g / cm 3

[0115] The true density of the aerosol-generating substrate 10 may be 1.0 g / cm 3 ~1.6g / cm 3 (including endpoint values), for example, the true density can be 1.0g / cm 3 , 1.1g / cm 3 , 1.2g / cm 3 , 1.4g / cm 3 , 1.6g / cm 3 wait.

[0116] Preferably, the true density of the aerosol generating substrate 10 may be 1.1 g / cm 3 ~1.4g / cm 3 .

[0117] The porosity of the aerosol generating matrix 10 may be 5% to 95% (including endpoint values), for example, the porosity may be 5%, 10%, 20%, 30%, 40%, 50%, 60%, 75%, 85%, 95%, etc.

[0118] Preferably, the porosity of the aerosol-generating substrate 10 may be 40% to 75%.

[0119] The volume density refers to the ratio of the mass of the aerosol generating substrate 10 to the total volume, wherein the total volume refers to the sum of the volume of the physical structure of the aerosol generating substrate 10, the volume of the airways 10a and the volume of the pores.

[0120] The airway 10a described in the embodiment of the present application is different from the pore. The airway 10a is a hole in the macroscopic sense, while the pore is a hole in the microscopic sense. The cross-sectional area and length and other dimensions of the airway 10a are much larger than those of the pore. The airway 10a is mainly formed by processing. Therefore, the cross-sectional area and length and other dimensions of the airway 10a can be changed according to the design requirements, while the cross-sectional area and length and other dimensions of the pore are mainly formed naturally during the processing process.

[0121] by Figure 1 Taking the cylindrical aerosol generating substrate 10 as an example, the volume density of the aerosol generating substrate 10 = mass M / volume V, where V = π×(D / 2) 2 ×H, D is the diameter of the cylindrical aerosol-generating substrate 10 , and H is the height of the cylindrical aerosol-generating substrate 10 .

[0122] The true density refers to the actual mass of the aerosol generating matrix 10 per unit volume in an absolutely dense state, that is, the density after removing the air channels 10a and pores. In other words, the volume here does not include the volume of the air channels 10a and pores.

[0123] Porosity refers to the ratio of the sum of the volumes of all air channels 10a of the aerosol generating substrate 10 to the total volume of the aerosol generating substrate 10. Figure 1 Taking the cylindrical aerosol generating substrate 10 as an example, the airway 10a is located at the center of the aerosol generating substrate 10, the airway 10a extends along the Z1 direction and passes through both ends of the aerosol generating substrate 10, the diameter of the airway 10a is d, the height of the cylindrical aerosol generating substrate 10 is H (the height of the airway 10a is also H), and the volume of the airway 10a is V1=π×(d / 2) 2 × H. Porosity = volume of air channel 10a / total volume of aerosol-generating substrate 10 = V1 / V = ​​d 2 / D 2 .

[0124] In other embodiments, Figure 4 Taking the aerosol-generating substrate 10 as an example, which has a plurality of air channels 10 a , the porosity of the aerosol-generating substrate 10 is the ratio of the sum of the volumes of the plurality of air channels 10 a to the total volume of the aerosol-generating substrate 10 .

[0125] When the true density of the aerosol-generating substrate 10 is the same, the smaller the bulk density, the greater the porosity, and the larger the bulk density, the smaller the porosity. When the bulk density of the aerosol-generating substrate 10 is the same, the greater the true density, the smaller the porosity, and the smaller the true density, the greater the porosity.

[0126] The study found that when the volume density is greater than 1.40g / cm 3 , or true density greater than 1.6g / cm 3 , or when the porosity is less than 5%, the aerosol generating matrix 10 is denser, the mass of the aerosol generating matrix 10 is larger and the utilization rate is lower, the heating rate of the aerosol generating matrix 10 is slow during the heating process, the aerosol generation rate is slow, the preheating time is long, the puffing consistency is poor, the aerosol flow resistance is large (i.e., the puffing resistance is large), which is not conducive to puffing, and the user's puffing experience is poor.

[0127] When the volume density is less than 0.25 g / cm 3 , or true density is less than 1.10g / cm 3, or when the porosity is greater than 95%, the mass of the aerosol generating matrix 10 is relatively small, and the aerosol generating matrix 10 is prone to uneven aerosol release during the heating process (for example, the first two puffs release quickly and in large amounts, while the aerosol release amount is small in the last few puffs). In addition, since the aerosol generating matrix 10 is too loose and the suction resistance is relatively small, the aerosol is easily diluted by the air (that is, the inhaled aerosol contains too much air), the aerosol concentration is reduced, and the user's suction experience is affected.

[0128] The volume density of the aerosol generating substrate 10 in the embodiment of the present application is 0.25 g / cm 3 ~1.40g / cm 3 , true density is 1.0g / cm 3 ~1.6g / cm 3 The porosity of the aerosol generating matrix 10 is 5% to 95%, and the mass of the aerosol generating matrix 10 is moderate. During the heating process, the heating rate of the aerosol generating matrix 10 can be effectively improved, so that the aerosol can be released quickly and evenly. At the same time, the suction resistance of the aerosol generating matrix 10 can also be maintained within a suitable range. The aerosol has good fluidity and is not easily diluted by air, thereby greatly improving the suction experience.

[0129] See also Figures 1 to 28 For the convenience of description, the air channels 10a located inside or outside the aerosol generating substrate 10 may be respectively referred to as the first air channel 10a1 and the second air channel 10a2, wherein the first air channel 10a1 is located inside the aerosol generating substrate 10, and the second air channel 10a2 is located outside the aerosol generating substrate 10.

[0130] The aerosol-generating substrate 10 may be Figures 1 to 20 As shown, only the first airway 10a1 is provided, but it is also possible to Fig.21 As shown, only the second airway 10a2 is provided, and it is also possible to Fig. 22 and Fig.23 As shown, a first air passage 10a1 and a second air passage 10a2 are provided at the same time.

[0131] The cross-sectional shape of the first air channel 10a1 is not limited. For example, the cross-sectional shape of the first air channel 10a1 can be circular, polygonal (including but not limited to triangle, square, prism, trapezoid, etc.), elliptical, oval, irregular, etc.

[0132] When a plurality of first air channels 10 a 1 are provided inside the aerosol-generating substrate 10 , the cross-sectional area and cross-sectional shape of each first air channel 10 a 1 may be set as required.

[0133] For example, see Figure 4The cross-sectional areas of all the first air passages 10a1 may be completely identical, and the cross-sectional shapes of all the first air passages 10a1 may also be completely identical.

[0134] For example, see Fig.25 Among all the first air channels 10a1, the cross-sectional area of ​​at least one of the first air channels 10a1 may be different from the cross-sectional areas of the other first air channels 10a1, that is, the cross-sectional areas of the first air channels 10a1 on the same aerosol generating substrate 10 may not be completely the same.

[0135] For example, see Fig. 9 , Fig.10 , Figure 12 to Figure 14 Among the multiple first air channels 10a1, the cross-sectional shape of at least one of the first air channels 10a1 may be different from the cross-sectional shapes of the other first air channels 10a1, that is, the cross-sectional shapes of the first air channels 10a1 on the same aerosol generating substrate 10 may not be completely the same.

[0136] The second air channel 10a2 can be formed in various ways. For example, see Fig.23 The aerosol generating substrate 10 may include a main body 11 and a plurality of protrusions 12 , wherein the protrusions 12 are arranged at intervals on the circumference of the main body 11 , and the intervals between two adjacent protrusions 12 form a second air channel 10 a 2 .

[0137] The number of the protrusions 12 may be two or more, as long as the interval between two adjacent protrusions 12 can form the second air channel 10 a 2 .

[0138] For example, see Fig.21 and Fig. 22 Part of the outer surface of the aerosol-generating substrate 10 may also be recessed to form the second air passage 10a2. The difference between the aerosol-generating substrate 10 in which the second air passage 10a2 is formed by recessing and the aerosol-generating substrate 10 in which the second air passage 10a2 is formed by protrusions 12 is that the aerosol-generating substrate 10 in which the second air passage 10a2 is formed by recessing does not have a distinct main body 11 and a plurality of protrusions 12.

[0139] There is no limitation on the cross-sectional shapes of the second air channel 10a2 formed at the interval between two adjacent protrusions 12 and the second air channel 10a2 formed by the depression of part of the outer surface of the aerosol generating matrix 10. For example, the cross-sectional shape of the second air channel 10a2 can be one of semicircular, semi-elliptical, polygonal (including but not limited to triangle, square, prism, trapezoid, etc.) and irregular.

[0140] The second air channel 10a2 formed at the interval between two adjacent protrusions 12 and the second air channel 10a2 formed by the depression of part of the outer surface of the aerosol generating matrix 10 can increase the surface area of ​​the aerosol generating matrix 10, increase the number of air channels 10a on the surface of the aerosol generating matrix 10, and facilitate the rapid release of aerosols. At the same time, it can also increase the heat conduction efficiency, which is more conducive to the extraction of effective ingredients and the consistency of sensory perception. In addition, if circumferential heating is used, the user's puffing experience can also be improved by adjusting the heating rate.

[0141] For example, see Fig.24 The aerosol generating substrate 10 may be in a spiral shape with multiple turns, and two adjacent turns of the aerosol generating substrate 10 are spaced apart so that a second air channel 10a2 is formed at the spaced apart positions.

[0142] For the aerosol generating matrix 10 with multiple spiral turns, the second air channel 10a2 is also spiral. The heat conduction of the spiral second air channel 10a2 is more uniform, which is beneficial to the consistency of sensory experience.

[0143] In addition, if the first air channel 10 a 1 is provided inside the spiral aerosol generating substrate 10 , the release and extraction of aerosol can be further enhanced, thereby improving the utilization rate of the aerosol generating substrate 10 .

[0144] Further, for an aerosol generating substrate 10 having a plurality of first air channels 10a1 extending from one end of the aerosol generating substrate 10 along the first direction Z1 to the other end thereof, these first air channels 10a1 may be arranged in a variety of ways, which will be illustrated in the following embodiments. It should be noted that the first air channels 10a1 described in the following embodiments are all first air channels 10a1 extending from one end of the aerosol generating substrate 10 along the first direction Z1 to the other end thereof, but it does not mean that all first air channels 10a1 inside the aerosol generating substrate 10 can only extend from one end of the aerosol generating substrate 10 along the first direction Z1 to the other end thereof. In some embodiments, first air channels 10a1 extending from one end of the aerosol generating substrate 10 along other directions to the other end thereof may also be provided inside the aerosol generating substrate 10.

[0145] In one embodiment, please refer to Figure 4 and Fig.11 , multiple first airways 10a1 can be arranged to form multiple trajectory lines, wherein each first airway 10a1 in a single trajectory line is linearly arranged along the second direction Z2, and multiple trajectory lines are arranged along the third direction Z3, wherein the second direction Z2 and the third direction Z3 intersect, and the plane where the second direction Z2 and the third direction Z3 are located is perpendicular to the first direction Z1.

[0146] For example, see Figure 4, each first air channel 10a1 in a single trajectory line can be arranged in a straight line along the second direction Z2, and multiple trajectory lines can be arranged along a third direction Z3 perpendicular to the second direction Z2. In other words, multiple first air channels 10a1 can be arranged as Fig.13 In other embodiments, the first air channels 10a1 may also be arranged in a matrix shape. Fig.16 The grid shape shown.

[0147] For example, see Fig.11 The first air channels 10 a 1 in a single trajectory line may be arranged along a circumferential direction around the center of the aerosol generating substrate 10 , and the plurality of trajectory lines may be arranged along a radial direction of the aerosol generating substrate 10 .

[0148] The circumferential direction surrounding the center of the aerosol generating substrate 10 is equivalent to the second direction Z2, and the radial direction of the aerosol generating substrate 10 is equivalent to the third direction Z3, that is, the plurality of first air channels 10a1 may be arranged in a ring shape.

[0149] See also Figure 4 , the first airways 10a1 in the multiple trajectory lines can be evenly distributed, that is, all the first airways 10a1 are exactly the same, the first airways 10a1 in a single trajectory line are equidistantly arranged, and the multiple trajectory lines are also equidistantly arranged.

[0150] The uniform distribution of the first air channels 10a1 can make the mass per unit volume of the region where the aerosol generating substrate 10 is provided with the first air channels 10a1 relatively uniform. Thus, during the heating and puffing process, the uniformity of aerosol release from the aerosol generating substrate 10 can be better improved, thereby improving the consistency of puffing.

[0151] In other embodiments, the first air channels 10a1 in the multiple trajectory lines may also be unevenly distributed. The unevenly distributed first air channels 10a1 combined with different heating methods can achieve uniform heating of the aerosol generating matrix 10 and consistency of aerosol in the first few puffs and the last few puffs of suction.

[0152] For example, taking the case where a plurality of first air passages 10a1 are arranged in a ring shape, for example, see Fig.25 , the first air passages 10a1 in a single trajectory are arranged repeatedly, and the repeated arrangement means that the first air passages 10a1 in the same exhaust passage 10a are exactly the same. From the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10, the cross-sectional area of ​​the first air passages 10a1 in each trajectory may gradually increase. In other words, the cross-sectional areas of the first air passages 10a1 in different trajectory lines are different, and the farther from the center of the aerosol generating substrate 10, the larger the cross-sectional area of ​​the first air passages 10a1.

[0153] For example, see Fig.26 , the first air channels 10a1 in a single trajectory are repeatedly arranged, and the spacing between the first air channels 10a1 in two adjacent trajectory lines may gradually decrease from the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10. In other words, the plurality of trajectory lines are not arranged at equal distances, and the farther from the center of the aerosol generating substrate 10, the smaller the spacing between the first air channels 10a1 in two adjacent trajectory lines.

[0154] The aerosol generating substrate 10 with a larger cross-sectional area of ​​the first air channel 10a1 as it is farther away from the center of the aerosol generating substrate 10, and the aerosol generating substrate 10 with a smaller spacing between the first air channels 10a1 in two adjacent trajectory lines as it is farther away from the center of the aerosol generating substrate 10, are closer to the central area of ​​the aerosol generating substrate 10 and have a larger mass per unit volume of the aerosol generating substrate 10. When these two types of aerosol generating substrates 10 are adapted to the central heating method, the time required for heat to be conducted from the inside to the outside is longer, thereby extending the time for the outer wall of the aerosol generating substrate 10 to be heated, improving the uniformity of aerosol release from the aerosol generating substrate 10, and increasing the puffing time / number of puffs. At the same time, the consistency of aerosol release can be maintained, providing users with a comfortable puffing experience.

[0155] Continuing with the example of multiple first air passages 10a1 arranged in a ring shape, for example, see Fig. 27 , the first air passages 10a1 in a single trajectory are repeatedly arranged, and the cross-sectional areas of the first air passages 10a1 in each trajectory may gradually decrease from the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10. In other words, the cross-sectional areas of the first air passages 10a1 in different trajectories are different, and the farther from the center of the aerosol generating substrate 10, the smaller the cross-sectional areas of the first air passages 10a1.

[0156] For example, see Fig.28 , the first air channels 10a1 in a single trajectory are repeatedly arranged, and the spacing between the first air channels 10a1 in two adjacent trajectory lines may gradually increase from the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10. In other words, the plurality of trajectory lines are not arranged at equal distances, and the farther from the center of the aerosol generating substrate 10, the larger the spacing between the first air channels 10a1 in two adjacent trajectory lines.

[0157] The aerosol generating substrate 10 that is farther away from the center of the aerosol generating substrate 10 and has a smaller cross-sectional area of ​​the first air channel 10a1, and the aerosol generating substrate 10 that is farther away from the center of the aerosol generating substrate 10 and has a larger spacing between the first air channels 10a1 in two adjacent trajectory lines, are closer to the outer wall of the aerosol generating substrate 10 and have a larger mass per unit volume of the aerosol generating substrate 10. When these two types of aerosol generating substrates 10 are adapted to the circumferential heating method, the time required for heat to be conducted from the outside to the inside is longer, thereby extending the time for the center of the aerosol generating substrate 10 to be heated, improving the uniformity of aerosol release from the aerosol generating substrate 10, and increasing the puffing time / number of puffs. At the same time, the consistency of aerosol release can be maintained, providing users with a comfortable puffing experience.

[0158] It should be noted that the non-uniform distribution modes of the first airways 10a1 in multiple trajectory lines are not limited to the above four types. Various adjustments can be made as needed. For example, the spacing between the first airways 10a1 in a single trajectory line can be changed, the cross-sectional shapes of the first airways 10a1 in different rows can be changed, and the above-mentioned implementation methods of cross-sectional area changes can be combined with the implementation methods of spacing changes, etc.

[0159] In addition, for multiple trajectory lines arranged in a non-circular shape, such as Figure 4 and Figure 8 The arrangement shown may also be arranged in a non-uniform distribution manner as described in the above embodiment.

[0160] In some embodiments, the plurality of first air channels 10a1 inside the aerosol generating substrate 10 may also be randomly distributed. Among the plurality of randomly distributed first air channels 10a1, the cross-sectional shapes of the first air channels 10a1 may be completely identical, or the cross-sectional shapes of at least two of the first air channels 10a1 may be different, and similarly, the cross-sectional areas of the first air channels 10a1 may be completely identical, or the cross-sectional areas of at least two of the first air channels 10a1 may be different.

[0161] In addition, for the aerosol generating substrate 10 having a plurality of first air channels 10a1 disposed therein, whether a plurality of trajectory lines are disposed in a manner or a randomly distributed manner, in one embodiment, please refer to Figures 16 to 20 The first air channels 10a1 may be distributed in various regions within the aerosol generating substrate 10, that is, almost every region within the aerosol generating substrate 10 is provided with a first air channel 10a1, and there is no obvious region without a first air channel 10a1.

[0162] In another embodiment, see Figure 8The aerosol generating substrate 10 has a first region 10b and a second region 10c inside, and the first air passages 10a1 can be distributed in the first region 10b, that is, the first air passages 10a1 can be provided only in the first region 10b, while the second region 10c is not provided with the first air passages 10a1. The number and position of the first region 10b and the second region 10c can be determined as required and are not limited here.

[0163] In one embodiment, please refer to Fig.12 The aerosol generating substrate 10 has a third region 10d and a fourth region 10e surrounding the third region 10d. A portion of the first air channels 10a1 is distributed in the third region 10d, and another portion of the first air channels 10a1 is distributed in the fourth region 10e. The cross-sectional shape and cross-sectional area of ​​each first air channel 10a1 located in the third region 10d are the same, and the cross-sectional shape of at least one first air channel 10a1 located in the fourth region 10e is a portion of the cross-sectional shape of the first air channel 10a1 located in the third region 10d. In other words, at least two first air channels 10a1 have different cross-sectional shapes inside the aerosol generating substrate 10, and the cross-sectional shape of the different first air channels 10a1 in the fourth region 10e is a portion of the cross-sectional shape of the first air channel 10a1 located in the third region 10d.

[0164] Since the size of the aerosol generating matrix 10 is limited to a certain extent, the cross-sectional shape of at least one first air channel 10a1 located in the fourth area 10e is a part of the cross-sectional shape of the first air channel 10a1 located in the third area 10d. The cross-sectional area and cross-sectional shape of each first air channel 10a1 can be flexibly designed. Therefore, it is not only convenient to adjust the inhalation resistance when the user inhales, but also convenient to adjust the mass distribution at different positions of the aerosol generating matrix 10, so as to better improve the heating rate and heating uniformity, and then better improve the inhalation experience.

[0165] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0166] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An aerosol generating substrate, characterized in that The aerosol generating substrate is an integral structure having at least one air channel, at least one of all the air channels extends from one end of the aerosol generating substrate along a first direction to another opposite end, and at least one of the opposite ends of each of the air channels along the extension direction is an open end; The volume density of the aerosol-generating matrix is ​​0.25 g / cm 3 ~1.40g / cm 3 and / or, True density is 1.0g / cm 3 ~1.6g / cm 3 and / or, The porosity is 5% to 95%.

2. The aerosol-generating substrate according to claim 1, characterized in that The bulk density is 0.40 g / cm 3 ~1.10g / cm 3 and / or, The true density is 1.1 g / cm 3 ~1.4g / cm 3 and / or, The porosity is 40% to 75%.

3. The aerosol generating substrate according to claim 1 or 2, characterized in that Two opposite ends of each of the airways along the extension direction are open ends.

4. The aerosol-generating substrate according to claim 1 or 2, characterized in that The airway comprises at least one of a first airway and a second airway, wherein the first airway is located inside the aerosol-generating substrate and the second airway is located outside the aerosol-generating substrate.

5. The aerosol-generating substrate according to claim 4, characterized in that The cross-sectional shape of the first airway is one of a circle, an ellipse, an oval, a polygon and an irregular shape.

6. The aerosol-generating substrate according to claim 4, characterized in that The aerosol generating substrate is provided with a plurality of the first air channels inside; Among all the first airways, a cross-sectional area of ​​at least one of the first airways is different from the cross-sectional areas of the other first airways; and / or, Among all the first air channels, a cross-sectional shape of at least one of the first air channels is different from the cross-sectional shapes of the other first air channels.

7. The aerosol-generating substrate according to claim 4, characterized in that The aerosol generating substrate comprises a main body and a plurality of protrusions, each of the protrusions is arranged at intervals on the circumference of the main body, and the second air channel is formed at the interval between two adjacent protrusions; or, A portion of the outer surface of the aerosol generating substrate is recessed to form the second air channel.

8. The aerosol-generating substrate according to claim 7, characterized in that The cross-sectional shape of the second air channel is one of a semicircular shape, a semi-elliptical shape, a polygonal shape and an irregular shape.

9. The aerosol-generating substrate according to claim 4, characterized in that The aerosol generating substrate is in a spiral shape with multiple turns, and two adjacent turns of the aerosol generating substrate are arranged at intervals so that the second air channel is formed at the intervals.

10. The aerosol-generating substrate according to claim 4, characterized in that The interior of the aerosol generating substrate has a plurality of the first air channels extending from one end of the aerosol generating substrate to the other opposite end along the first direction; Multiple first airways are arranged to form multiple trajectory lines, wherein each of the first airways in a single trajectory line is linearly arranged along a second direction, and multiple trajectory lines are arranged along a third direction, wherein the second direction and the third direction intersect, and the plane where the second direction and the third direction are located is perpendicular to the first direction.

11. The aerosol-generating substrate according to claim 10, characterized in that The first airways in the plurality of trajectory lines are evenly distributed.

12. The aerosol-generating substrate according to claim 10, characterized in that The first airways in a single trajectory line are arranged in a straight line along the second direction, and a plurality of trajectory lines are arranged along the third direction perpendicular to the second direction.

13. The aerosol-generating substrate of claim 10, wherein: The first air channels in a single trajectory are arranged along a circumferential direction around the center of the aerosol generating substrate, and a plurality of trajectory lines are arranged along a radial direction of the aerosol generating substrate.

14. The aerosol-generating substrate of claim 10, wherein: The first air channels in a single trajectory are repeatedly arranged, and the cross-sectional area of ​​the first air channels in each trajectory gradually increases or decreases from the center of the aerosol generating substrate to the radial outer side of the aerosol generating substrate.

15. The aerosol-generating substrate of claim 10, wherein: The first air channels in a single trajectory are repeatedly arranged, and the distance between the first air channels in two adjacent trajectory lines gradually increases or decreases from the center of the aerosol generating substrate to the outer side of the aerosol generating substrate in the radial direction.

16. The aerosol-generating substrate of claim 4, wherein: The aerosol generating substrate has a plurality of first air channels inside thereof extending from one end of the aerosol generating substrate to another opposite end along the first direction, and the first air channels are randomly distributed.

17. The aerosol-generating substrate of claim 4, wherein: The interior of the aerosol generating substrate has a plurality of the first air channels extending from one end of the aerosol generating substrate to the other opposite end along the first direction; Each of the first air channels is distributed in various areas inside the aerosol generating substrate; or, The interior of the aerosol generating substrate has a first region and a second region, and the first air channels are distributed in the first region.

18. The aerosol-generating substrate of claim 4, wherein: The interior of the aerosol generating substrate has a plurality of the first air channels extending from one end of the aerosol generating substrate to the other opposite end along the first direction; The interior of the aerosol generating matrix has a third area and a fourth area surrounding the outer periphery of the third area, a portion of the first air channels are distributed in the third area, and another portion of the first air channels are distributed in the fourth area, wherein the cross-sectional shape and cross-sectional area of ​​each of the first air channels located in the third area are the same, and the cross-sectional shape of at least one of the first air channels located in the fourth area is a portion of the cross-sectional shape of the first air channel located in the third area.

19. An aerosol-generating substrate according to claim 1 or 2, characterized in that The airway is a straight airway extending in a straight line; or, The airway is a spiral airway, and at least a portion of the spiral airway along the extension direction is in a curved shape with a curvature that is not zero.

20. The aerosol-generating substrate according to claim 1 or 2, characterized in that The cross-sectional shape of the aerosol generating substrate perpendicular to the first direction is one of a circle, an ellipse, an oval, a polygon and an irregular shape.

21. The aerosol-generating substrate according to claim 1 or 2, characterized in that The aerosol generating substrate is columnar, and the first direction is the elongation direction of the aerosol generating substrate.

22. An aerosol generating article, characterized in that include: The aerosol-generating substrate according to any one of claims 1 to 21; A functional segment disposed at one end of the aerosol generating substrate along the first direction, the functional segment comprising at least a temperature reduction segment; An outer wrapping layer wraps around the outer peripheral side of the functional segment and the aerosol generating substrate.

23. An aerosol-generating article according to claim 22, characterized in that The functional section further comprises a filtering section, and the cooling section is located between the filtering section and the aerosol generating substrate.

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