Aerosol generating substrate and aerosol generating article

Abstract

Provided are an aerosol generating substrate and an aerosol generating article. The aerosol generating substrate is an integral structure having one or more airways; among all of the airways, at least one airway extends from one end to an opposite end of the aerosol generating substrate in a first direction; and at least one of two opposite ends of each of the airways in an extending direction is an open end. A bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or, a true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or, a porosity of the aerosol generating substrate is 5% to 95%.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Patent Application No. PCT / CN2024 / 119732 filed on Sep. 19, 2024, which is based on and claims priority to Chinese Patent Application No. 202311308739.4 filed on Oct. 10, 2023. International Patent Application No. PCT / CN2024 / 119732 and Chinese Patent Application No. 202311308739.4 are incorporated by reference in their entireties.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of smoke generating articles, and in particular to an aerosol generating substrate and an aerosol generating article.BACKGROUND

[0003] An aerosol generating article typically generates an aerosol in a heat-not-burn manner. Specifically, an aerosol generating substrate is provided in the aerosol generating article, and the aerosol generating substrate is heated by an external heat source, such as a heating component on an aerosol generating device, so that the aerosol generating substrate is heated to a degree just enough to release a fragrance. The aerosol generating substrate does not burn, but is loaded with an atomization agent. During the usage, the atomization agent is released by heating and the related substances are also released by heating of the substrate itself (where the atomization agent may be not necessary) to form a smoke.

[0004] In related technologies, there are three types of aerosol generating substrates: granular type, traditional tobacco type, and flake type. Such aerosol generating substrates have characteristics of a relatively low efficiency in aerosol extraction and a relatively poor inhalation experience feeling.SUMMARY

[0005] In view of the above, the embodiments of the present disclosure are expected to provide an aerosol generating substrate and an aerosol generating article capable of improving the inhalation experience feeling.

[0006] In order to achieve the above objectives, an embodiment of the present disclosure provides an aerosol generating substrate. The aerosol generating substrate is an integral structure having one or more airways; among all of the airways, at least one airway extends from one end to an opposite end of the aerosol generating substrate in a first direction, and at least one end of two opposite ends of each of the airways in an extending direction is an open end.

[0007] Herein, a bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or,

[0008] a true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or,

[0009] a porosity of the aerosol generating substrate is 5% to 95%.

[0010] In one embodiment, the bulk density is 0.40 g / cm3 to 1.10 g / cm3.

[0011] In one embodiment, the true density is 1.1 g / cm3 to 1.4 g / cm3.

[0012] In one embodiment, the porosity is 40% to 75%.

[0013] In one embodiment, the two opposite ends of each of the airways in the extending direction are open ends.

[0014] In one embodiment, the airways include at least one of a first airway and a second airway, the first airway is located in an interior of the aerosol generating substrate, and the second airway is located in an exterior of the aerosol generating substrate.

[0015] In one embodiment, a cross-sectional shape of the first airway is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

[0016] In one embodiment, a plurality of the first airways are disposed in the interior of the aerosol generating substrate, and among all of the first airways, at least one first airway has a cross-sectional area different from cross-sectional areas of other first airways.

[0017] In one embodiment, a plurality of the first airways are disposed in the interior of the aerosol generating substrate, and among all of the first airways, at least one of first airway has a cross-sectional shape different from cross-sectional shapes of other first airways.

[0018] In one embodiment, the aerosol generating substrate includes a main body part and a plurality of protruding parts, the protruding parts are disposed at intervals on a peripheral side of the main body part, and the second airway is formed at an interval between two adjacent protruding parts.

[0019] In one embodiment, a portion of an outer surface of the aerosol generating substrate is recessed to form the second airway.

[0020] In one embodiment, a cross-sectional shape of the second airway is one of the following: a semicircular shape, a semielliptical shape, a polygonal shape, and an irregular shape.

[0021] In one embodiment, the aerosol generating substrate has a spiral shape with a plurality of turns, and two adjacent turns of the aerosol generating substrate are disposed at an interval to form the second airway in the interval.

[0022] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction.

[0023] The plurality of first airways are arranged to form a plurality of trajectory lines, each of the first airways in a single trajectory line is linearly arranged in a second direction, the plurality of trajectory lines are arranged in a third direction, the second direction and the third direction intersect, and a plane in which the second direction and the third direction are located is perpendicular to the first direction.

[0024] In one embodiment, each of the first airways in the plurality of trajectory lines is uniformly distributed.

[0025] In one embodiment, each of the first airways in the single trajectory line is linearly arranged in the second direction, and the plurality of trajectory lines are arranged in the third direction that is perpendicular to the second direction.

[0026] In one embodiment, each of the first airways in the single trajectory line is arranged in a circumferential direction around a center of the aerosol generating substrate, and the plurality of trajectory lines are arranged in a radial direction of the aerosol generating substrate.

[0027] In one embodiment, each of the first airways in the single trajectory line is repeatedly arranged; and a cross-sectional area of the first airway in each trajectory line gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction.

[0028] In one embodiment, each of the first airways in the single trajectory line is repeatedly arranged; and a spacing between the first airways in two adjacent trajectory lines gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction.

[0029] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, and each of the first airways is randomly distributed.

[0030] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, and each of the first airways is distributed in a respective region of the interior of the aerosol generating substrate.

[0031] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, the interior of the aerosol generating substrate has a first region and a second region, and each of the first airways is distributed in the first region.

[0032] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction.

[0033] The interior of the aerosol generating substrate has a third region and a fourth region surrounding an outer peripheral side of the third region, a portion of the first airways are distributed in the third region, and another portion of the first airways are distributed in the fourth region, wherein each of the first airways located in the third region has the same cross-sectional shape and the same cross-sectional area, and a cross-sectional shape of at least one of the first airways located in the fourth region is a portion of the cross-sectional shape of the first airways located in the third region.

[0034] In one embodiment, the airway is a straight-through airway extending along a straight line.

[0035] In one embodiment, the airway is a spiral airway, and at least partial region of the spiral airway in the extending direction has a curvilinear shape with a non-zero curvature.

[0036] In one embodiment, a cross-sectional shape of the aerosol generating substrate perpendicular to the first direction is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

[0037] In one embodiment, the aerosol generating substrate has a columnar shape, and the first direction is an elongation direction of the aerosol generating substrate.

[0038] Another embodiment of the present disclosure provides an aerosol generating article, which includes:

[0039] the aerosol generating substrate described above;

[0040] a functional segment, disposed at the one end of the aerosol generating substrate in the first direction, and the functional segment at least including a cooling segment; and

[0041] an outer wrapping layer, wrapped around outer peripheral sides of the functional segment and the aerosol generating substrate.

[0042] In one embodiment, the functional segment further comprises a filtering segment, and the cooling segment is located between the filtering segment and the aerosol generating substrate.

[0043] Embodiments of the present disclosure provide the aerosol generating substrate and the aerosol generating article. Herein, the aerosol generating substrate is the integral structure having one or more airways; among all of the airways, at least one airway extends from one end to the opposite end of the aerosol generating substrate in the first direction, and at least one end of two opposite ends of each of the airways in the extending direction is the open end. The bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or, the true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or, the porosity of the aerosol generating substrate is 5% to 95%. The mass of the aerosol generating substrate is moderate. During the heating process, the heating rate of the aerosol generating substrate 10 can be effectively increased, which enables the aerosol to be released rapidly and uniformly. At the same time, the resistance to draw of inhalation of the aerosol generating substrate 10 can also be maintained within an appropriate range, such that the fluidity of the aerosol is good and is not easily diluted by air. Therefore, the inhalation experience feeling can be better improved.BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG. 1 is a schematic structural diagram of a first aerosol generating substrate according to an embodiment of the present disclosure.

[0045] FIG. 2 is a schematic structural diagram of a second aerosol generating substrate according to an embodiment of the present disclosure.

[0046] FIG. 3 is a schematic structural diagram of a third aerosol generating substrate according to an embodiment of the present disclosure.

[0047] FIG. 4 is a schematic structural diagram of a fourth aerosol generating substrate according to an embodiment of the present disclosure.

[0048] FIG. 5 is a cross-sectional diagram of the aerosol generating substrate shown in FIG. 4.

[0049] FIG. 6 is a cross-sectional diagram of a fifth aerosol generating substrate according to an embodiment of the present disclosure.

[0050] FIG. 7 is a cross-sectional diagram of a sixth aerosol generating substrate according to an embodiment of the present disclosure.

[0051] FIG. 8 is a cross-sectional diagram of a seventh aerosol generating substrate according to an embodiment of the present disclosure.

[0052] FIG. 9 is a schematic structural diagram of an eighth aerosol generating substrate according to an embodiment of the present disclosure.

[0053] FIG. 10 is a schematic structural diagram of a ninth aerosol generating substrate according to an embodiment of the present disclosure.

[0054] FIG. 11 is a schematic structural diagram of a tenth aerosol generating substrate according to an embodiment of the present disclosure.

[0055] FIG. 12 is a schematic structural diagram of an eleventh aerosol generating substrate according to an embodiment of the present disclosure.

[0056] FIG. 13 is a schematic structural diagram of a twelfth aerosol generating substrate according to an embodiment of the present disclosure.

[0057] FIG. 14 is a schematic structural diagram of a thirteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0058] FIG. 15 is a schematic structural diagram of a fourteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0059] FIG. 16 is a schematic structural diagram of a fifteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0060] FIG. 17 is a schematic structural diagram of a sixteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0061] FIG. 18 is a schematic structural diagram of a seventeenth aerosol generating substrate according to an embodiment of the present disclosure.

[0062] FIG. 19 is a schematic structural diagram of an eighteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0063] FIG. 20 is a schematic structural diagram of a nineteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0064] FIG. 21 is a schematic structural diagram of a twentieth aerosol generating substrate according to an embodiment of the present disclosure.

[0065] FIG. 22 is a schematic structural diagram of a twenty-first aerosol generating substrate according to an embodiment of the present disclosure.

[0066] FIG. 23 is a schematic structural diagram of a twenty-second aerosol generating substrate according to an embodiment of the present disclosure.

[0067] FIG. 24 is a schematic structural diagram of a twenty-third aerosol generating substrate according to an embodiment of the present disclosure.

[0068] FIG. 25 is a schematic structural diagram of a twenty-fourth aerosol generating substrate according to an embodiment of the present disclosure.

[0069] FIG. 26 is a schematic structural diagram of a twenty-fifth aerosol generating substrate according to an embodiment of the present disclosure.

[0070] FIG. 27 is a schematic structural diagram of a twenty-sixth aerosol generating substrate according to an embodiment of the present disclosure.

[0071] FIG. 28 is a schematic structural diagram of a twenty-seventh aerosol generating substrate according to an embodiment of the present disclosure.

[0072] FIG. 29 is a schematic structural diagram of a first aerosol generating article according to an embodiment of the present disclosure.

[0073] FIG. 30 is a cross-sectional diagram of the aerosol generating article shown in FIG. 29.

[0074] FIG. 31 is a schematic structural diagram of a second aerosol generating article according to an embodiment of the present disclosure.DETAILED DESCRIPTION

[0075] Embodiments of the present disclosure provide an aerosol generating article. Referring to FIGS. 1 to 28, the aerosol generating article includes an aerosol generating substrate 10.

[0076] The aerosol generating article may be configured to be used in conjunction with an aerosol generating device that includes a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate 10 to generate the aerosol, for inhalation by the user or for use in medicine, cosmetics, etc.

[0077] The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner and a peripheral heating manner. The center heating manner refers to a manner of inserting the heating component to the interior of the aerosol generating article, to bake and heat the aerosol generating article from the inside to the outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol generating article, to bake and heat the aerosol generating article from the outside to the inside. Specifically, such heating manners can be applied by resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc.

[0078] The specific structure of the aerosol generating substrate 10 is not limited herein. Exemplarily, in one embodiment, the aerosol generating substrate 10 may be made of an atomization medium per se, and for example, may be made of an aerosol generating fragrant medium. In some other embodiments, the aerosol generating substrate 10 may include a substrate body and an atomization medium disposed on the substrate body, and the substrate body may be, for example, a high-temperature resistant carbon fiber. Thus, through the arrangement of the substrate body, the strength of the aerosol generating substrate 10 can be enhanced, and the high temperature to a certain degree may be borne without generating peculiar smell.

[0079] The specific ingredient of the aerosol generating substrate 10 is not limited herein. Exemplarily, in one embodiment, the aerosol generating substrate 10 may include a plant ingredient, an auxiliary ingredient, a smoke-generating agent ingredient, a binder ingredient, etc.

[0080] In one embodiment, the plant ingredient is one or a combination of several types of powder formed by performing crushing treatment on tobacco raw materials, tobacco fragments, tobacco stems, tobacco powder, fragrant plants, etc. The plant ingredient is the core source of the fragrance of the article. Endogenous substances in the plant ingredient, such as nicotine, enter the human bloodstream through atomization, which promotes the pituitary gland to produce dopamine, thus achieving physiological satisfaction.

[0081] In one embodiment, the auxiliary ingredient may be one or a combination of several materials of an inorganic filler, a lubricating agent and an emulsifying agent. Herein, the inorganic filler includes one or a combination of several materials of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talcum powder and diatomite. The inorganic filler may provide a skeleton supporting effect for the plant ingredient, at the same time, the inorganic filler also has micro holes, and the wall material porosity after the plant ingredient is formed can be enhanced, so that the aerosol release rate can be improved.

[0082] The lubricating agent includes one or a combination of several materials of candelilla wax, Brazil wax, shell-lac, helianthus annuus wax, rice bran, beeswax, stearic acid and palmic acid. The lubricating agent may increase the fluidity of granules, decrease the friction among the granules, enable the integral granule distribution density to be uniform, reduce the pressure required for mold forming, and reduce the mold abrasion.

[0083] The emulsifying agent includes one or a combination of several materials of polyglycerol fatty acid ester, Tween-80 and polyvinyl alcohol. The emulsifying agent may slow down the loss of a fragrant substance during the storage process to a certain degree, enhance the stability of the fragrant substance, and improve the sensory quality of the article. The emulsifying agent (also referred to as a surfactant) can reduce the interfacial tension between water-soluble and water-insoluble components in the mixed system, and further form a robust film on a droplet surface or form a double electric layer on the droplet surface due to the charge(s) given by the emulsifier, which can prevent the droplet coalescence and maintain a uniform emulsion. Emulsification and homogenization of two immiscible components can improve the consistency of article quality.

[0084] The smoke-generating agent ingredient has a function of generating a great amount of steam when being heated, so that the aerosol volume of the smoke generating article can be improved. In one embodiment, the smoke-generating agent may include one or a combination of several materials of monohydric alcohol (such as menthol); polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol); ester of polyhydric alcohol (such as gylcerol monoacetate, diacetin, or glyceryl triacetate); monocarboxylic acid; and polybasic carboxylic acid (such as lauric acid, and myristic acid) or aliphatic ester of polybasic carboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a diacetin mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glycerin tributyrate, and lauryl acetate).

[0085] In one embodiment, the binder ingredient is extracted from natural plants, and is non-ionized modified viscous polysaccharide including one or a combination of several materials of tamarind polysaccharide, Pullulan, algal polysaccharide, locust bean gum, guar gum, and xyloglucan. The binder is in close contact with the interface of the ingredient material of the article by wetting, resulting in intermolecular attraction, thereby playing the role of binding the powder, liquid, etc. of the ingredient material. At the same time, the natural plants may be selected. In addition, the extraction and non-ionization of the binder can prevent the release of harmful substances such as methanol, formaldehyde, and acrolein caused by colloid modification, which can improve the safety of articles.

[0086] With continued reference to FIGS. 1 to 28, the aerosol generating substrate 10 is an integral structure. Exemplarily, the aerosol generating substrate 10 may be a particulate conjugate, which is a recombined tobacco medium, for example, a recombined tobacco medium containing ingredients such as a smoke-generating agent, a tobacco, and the like.

[0087] The aerosol generating substrate 10 may be formed into an integral structure by a process such as injection molding, compression molding, extrusion, casting, and rolling. Here, the extrusion process refers to a processing method where the raw material mixture is added into an extruder, the material is pushed forward by the screw through the action between the extruder barrel and the screw, and continuously passes through the die head to form articles or semi-finished articles of various cross sections.

[0088] Since the aerosol generating substrate 10 remains the integral structure whether subjected to heat inhalation or after heat cessation, and the phenomenon of disintegration and falling is not easy to occur. This addresses issues presented in the existing flake-like, filamentous or loose-particle aerosol generating substrate 10 such as flake detachment, filamentous or particle components falling off, and difficulty in cleaning.

[0089] With continued reference to FIGS. 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 may be a circle shape shown in FIG. 1, a polygonal shape (including but not limited to: a triangle shown in FIG. 18, a square shown in FIG. 19, a hexagon shown in FIG. 20, a prism shape, a trapezoid shape, and the like), an elliptical shape shown in FIG. 16, a waist-circular shape shown in FIG. 17, an irregular shape shown in FIGS. 21 to 24, and the like. Herein, the waist-circular shape refers to a closed shape formed by bisecting a circle into two semicircular arcs through the center of the circle and translating in opposite directions to each other, and connecting the endpoints of the two semicircular arcs with two parallel lines of the equal length. The irregular shape refers to a symmetric or asymmetric shape other than the shapes listed above, such as a snowflake shape.

[0090] With continued reference to FIGS. 1 to 28, the aerosol generating substrate 10 has one or more airways 10a. That is, there may be one airway 10a or multiple airways 10a. At least one end of the two opposite ends of the airway 10a in the extending direction is an open end. The open end refers to an end of the airway 10a that communicates with the outside.

[0091] Exemplarily, referring to FIG. 5, both two opposite ends of the airway 10a in the extension direction may be open ends.

[0092] Exemplarily, referring to FIG. 6, one end of the two opposite ends of the airway 10a in the extending direction may be the open end, and the another end may be a closed end that does not communicate with the outside.

[0093] Exemplarily, when multiple airways 10a are provided, one of the following may be implemented: both two opposite ends of all of the airways 10a in the extending direction may be open ends; one end of the two opposite ends of all of the airways 10a in the extending direction may be the open end, and another end may be the closed end; or, both two opposite ends of a portion of the airways 10a in the extending direction may be open ends, as well as one end of the two opposite ends of another portion of the airways 10a in the extending direction may be the open end, and the another end of the another portion of the airways 10a may be the closed end.

[0094] With continued reference to FIGS. 1 to 28, among all of the airways 10a, at least one airway 10a extends from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1.

[0095] The first direction Z1 may be any direction of the aerosol generating substrate 10. For example, as shown in FIG. 1, the first direction Z1 may be a height direction of the aerosol generating substrate 10. In other embodiments, the first direction Z1 may be a length direction or a width direction of the aerosol generating substrate 10 (where the height direction, the length direction, and the width direction are perpendicular to each other; and for the aerosol generating substrate 10 with a circular cross-sectional shape perpendicular to the first direction Z1, the length direction and the width direction correspond to two mutually perpendicular directions on the circular surface). Additionally, the first direction Z1 may be inclined with respect to at least two of the length direction, the width direction and the height direction of the aerosol generating substrate 10.

[0096] If the aerosol generating substrate 10 is provided with only one airway 10a, the airway 10a is required to extend from one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. If the aerosol generating substrate 10 is provided with multiple airways 10a, all of the airways 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1; or, one or a portion of the airways 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1, and the other airway(s) 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the other direction(s). Herein, the other direction(s) may refer to any direction not parallel to the first direction Z1.

[0097] Exemplarily, referring to FIGS. 1 to 28, the aerosol generating substrate 10 may have a columnar shape, and the first direction Z1 may be an elongation direction of the aerosol generating substrate 10.

[0098] In other some embodiments, the aerosol generating substrate 10 may also have a sheet shape.

[0099] With continued reference to FIGS. 1 to 28, the airways 10a may be disposed in an interior of the aerosol generating substrate 10 or an exterior of the aerosol generating substrate 10. When there are multiple airways 10a, one of the following may be implemented: all of the airways 10a may be disposed in the interior of the aerosol generating substrate 10; all of the airways 10a may be disposed in the exterior of the aerosol generating substrate 10; or, a portion of the airways 10a may be disposed in the interior of the aerosol generating substrate 10, and another portion of the airways 10a may be disposed in the exterior of the aerosol generating substrate 10. The specific arrangement manner of the airways 10a is described in detail in the following embodiments. It should be noted that the airway 10a located in the interior of the aerosol generating substrate 10 means that the peripheral side of the airway 10a is surrounded by the substrate material, that is, the inner side surface of the airway 10a are made of the substrate material, and the cross section of the airway 10a has a closed shape. In addition, the airway 10a located in the exterior of the aerosol generating substrate 10 means that one side of the airway 10a is a notch in communication with the outside, formed by an opening of the matrix medium material, that is, the cross section of the airway 10a has a non-closed shape.

[0100] With continued reference to FIGS. 5 and 15, the airway 10a may be a straight-through airway as shown in FIG. 5, the straight-through airway is the airway extending along a straight line, or the extending direction of the straight-through airway is a straight line.

[0101] The airway 10a may be a spiral airway as shown in FIG. 15, the spiral airway is a curved airway where at least partial region of the airway in the extending direction has a non-zero curvature. For example, in the extending direction of the spiral airway, the spiral airway may have a structural form that includes both the curved segment with a non-zero curvature and the straight line segment with a zero curvature; or, the spiral airway may have a structural form that includes only the curved segment with the non-zero curvature and does not include the straight line segment with the zero curvature. In other words, from the starting point to the endpoint of the spiral airway in the extending direction, the spiral airway may just need not to extend along the straight line.

[0102] When there are multiple airways 10a, a portion of the airways 10a may be the straight-through airways, and the another portion of the airways 10a may be the spiral airways.

[0103] The airway 10a can prolong the airflow path and increase the flow speed of the airflow in the aerosol generating substrate 10, thereby enhancing the impact force of the airflow, which can enable the aerosol to be uniformly mixed. As such, the extraction efficiency and uniformity of the aerosol in the aerosol generating substrate 10 can be improved, and the inhalation feeling of the user can be also enhanced.

[0104] Referring to FIGS. 29 to 31, the aerosol generating article may be provided with a functional segment 20 and an outer wrapping layer 30. The functional segment 20 is disposed at one end of the aerosol generating substrate 10 in the first direction. The functional segment 20 at least includes a cooling segment 21 for reducing the temperature of the aerosol entering the mouth. The outer wrapping layer 30 is wrapped around the outer peripheral sides of the functional segment 20 and the aerosol generating substrate 10.

[0105] The functional segment 20 may be provided with only the cooling segment 21 as shown in FIG. 30, or the functional segment 20 may be provided with a filtering segment 22 and the cooling segment 21 as shown in FIG. 31. For the functional segment 20 provided with the cooling segment 21, the cooling segment 21 is disposed between the filtering segment 22 and the aerosol generating substrate 10, for performing a cooling processing on the aerosol before the filtering segment 22 filters the aerosol, thereby reducing the temperature of the aerosol and improving the phenomenon of “mouth burning sensation” experienced by the user when inhaling the aerosol.

[0106] The material of the cooling segment 21 includes, but is not limited to, one or more combinations of materials such as: polyethylene (PE), Polylactic acid (PLA, also referred to as polylactide), Poly butyleneadipate-co-terephthalate (PBAT), Polypropylene (PP), acetate fiber, and propylene fiber.

[0107] The material of the filtering segment 22 includes, but is not limited to, one or more combinations of materials such as: polyethylene (PE), Polylactic acid (PLA, also referred to as polylactide), Poly butyleneadipate-co-terephthalate (PBAT), Polypropylene (PP), acetate fiber, and propylene fiber.

[0108] The material of the cooling segment 21 and the filtering segment 22 may be the same or different.

[0109] It should be noted that the aerosol generating article relies on the aerosol generating substrate 10 to generate the aerosol, and the functional segment 20 is not used to generate the aerosol.

[0110] The material of the outer wrapping layer 30 is not limited. For example, the material of the outer wrapping layer 30 includes, 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.

[0111] 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.

[0112] Furthermore, according to the embodiments of the present disclosure, the bulk density of the aerosol generating substrate 10 may be 0.25 g / cm3 to 1.40 g / cm3 (inclusive of the endpoint values). For example, the bulk density may be 0.25 g / cm3, 0.40 g / cm3, 0.60 g / cm3, 0.80 g / cm3, 1.10 g / cm3, 1.20 g / cm3, 1.40 g / cm3, or the like.

[0113] More preferably, the bulk density of the aerosol generating substrate 10 may be 0.40 g / cm3 to 1.10 g / cm3.

[0114] The true density of the aerosol generating substrate 10 may be 1.0 g / cm3 to 1.6 g / cm3 (inclusive of the endpoint values). For example, the true density may be 1.0 g / cm3, 1.1 g / cm3, 1.2 g / cm3, 1.4 g / cm3, 1.6 g / cm3, or the like.

[0115] More preferably, the true density of the aerosol generating substrate 10 may be 1.1 g / cm3 to 1.4 g / cm3.

[0116] The porosity of the aerosol generating substrate 10 may be 5% to 95% (inclusive of the endpoint values). For example, the porosity may be 5%, 10%, 20%, 30%, 40%, 50%, 60%, 75%, 85%, 95%, and the like.

[0117] More preferably, the porosity of the aerosol generating substrate 10 may be 40% to 75%.

[0118] The bulk density refers to the ratio of the mass of the aerosol generating substrate 10 to the total volume of the aerosol generating substrate 10, where the total volume is the sum of the volume of the solid structure of the aerosol generating substrate 10, the volume of the airway(s) 10a, and the volume of the pore(s).

[0119] The airway 10a described in the embodiments of the present disclosure is different from the pore. The airway 10a is the hole in a macroscopic sense, and the pore is the hole in the microscopic sense. Dimensions such as the cross-sectional area and length of the airway 10a are much larger than those of the pore. Since the airway 10a is mainly formed by processing, dimensions such as the cross-sectional area and the length of the airway 10a can be changed according to design requirements, while dimensions such as the cross-sectional area and the length of the pore are mainly formed naturally during the processing.

[0120] Taking the cylindrical aerosol generating substrate 10 shown in FIG. 1 as an example, the bulk density of the aerosol generating substrate 10=mass M / volume V, where V=π×(D / 2)2×H. Here, D is the diameter of the cylindrical aerosol generating substrate 10, and H is the height of the cylindrical aerosol generating substrate 10.

[0121] The true density refers to the actual mass per unit volume of the aerosol generating substrate 10 in an absolutely compact state, i.e., the density after removing the airway(s) 10a and the pore(s). In other words, the volume herein does not include the volume of the airway(s) 10a and the pore(s).

[0122] The porosity refers to the ratio of the sum of the volumes of all airways 10a in the aerosol generating substrate 10 to the total volume of the aerosol generating substrate 10. Here, taking the cylindrical aerosol generating substrate 10 shown in FIG. 1 as an example, the airway 10a is located at the center of the aerosol generating substrate 10, the airway 10a extends in the Z1 direction and penetrates 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. The porosity=the volume of the airway 10a / the total volume of the aerosol generating substrate 10, i.e., the porosity=V1 / V =d2 / D2.

[0123] In other embodiments, taking the aerosol generating substrate 10 shown in FIG. 4 a an example, there are multiple airways 10a, and the porosity of the aerosol generating substrate 10 is the ratio of the sum of the volumes of the multiple airways 10a to the total volume of the aerosol generating substrate 10.

[0124] When the true density of the aerosol generating substrates 10 remains the same, the smaller the bulk density, the larger the porosity; and the larger the bulk density, the smaller the porosity. When the bulk density of the aerosol generating substrate 10 remains the same, the larger the true density, the smaller the porosity; and the smaller the true density, the larger the porosity.

[0125] Studies have found that when the bulk density is greater than 1.40 g / cm3, or the true density is greater than 1.6 g / cm3, or the porosity is less than 5%, the aerosol generating substrate 10 is relatively dense, which results in a relatively large mass but a relatively low utilization rate of the aerosol generating substrate 10. During the heating process, the heating rate of the aerosol generating substrate 10 is slow, the aerosol generation rate is slow, the preheating time is long, the inhalation consistency is poor, and the resistance of the aerosol flow is high (i.e., the resistance to draw of inhalation is large), which is not conducive to inhalation, and the user's inhalation experience feeling is poor.

[0126] When the bulk density is less than 0.25 g / cm3, or the true density is less than 1.10 g / cm3, or the porosity is greater than 95%, the mass of the aerosol generating substrate 10 is relatively small. During the heating process, the aerosol generating substrate 10 is prone to exhibit non-uniform aerosol release (e.g., the rapid release with a large amount of aerosol in the initial puffs, followed by the release with a less amount of aerosol in the subsequent puffs). In addition, since the aerosol generating substrate 10 is too loose, the resistance to draw of inhalation is small, causing the aerosol to be easily diluted by air (i.e., the inhaled aerosol contains excessive air), which reduces the aerosol concentration, and affects the user's inhalation experience feeling.

[0127] According to the embodiments of the present disclosure, the bulk density of the aerosol generating substrate 10 is 0.25 g / cm3 to 1.40 g / cm3, the true density of the aerosol generating substrate 10 is 1.0 g / cm3 to 1.6 g / cm3, the porosity of the aerosol generating substrate 10 is 5% to 95%. Thus, the mass of the aerosol generating substrate 10 is moderate. During the heating process, the heating rate of the aerosol generating substrate 10 can be effectively increased, which enables the aerosol to be released rapidly and uniformly. At the same time, the resistance to draw of inhalation of the aerosol generating substrate 10 is also be maintained within an appropriate range, such that the fluidity of the aerosol is good and is not easily diluted by air. Therefore, the inhalation experience feeling can be better improved.

[0128] Referring to FIGS. 1 to 28, for convenience of description, for the airways 10a disposed in the interior or the exterior of the aerosol generating substrate 10, the airways 10a located at different positions may be referred to as the first airway(s) 10a1 and the second airway(s) 10a2, respectively. Herein, the first airway 10a1 is located in the interior of the aerosol generating substrate 10, and the second airway 10a2 is located in the exterior of the aerosol generating substrate 10.

[0129] The aerosol generating substrate 10 may be provided with only the first airway(s) 10a1 as shown in FIGS. 1 to 20, or may be provided with only the second airway(s) 10a2 as shown in FIG. 21, or may be provided with both the first airway(s) 10a1 and the second airway(s) 10a2 as shown in FIGS. 22 and 23.

[0130] The cross-sectional shape of the first airway 10a1 is not limited. For example, the cross-sectional shape of the first airway 10a1 may be a circular shape, a polygonal shape (including, but not limited to a triangle, a square, a prism shape, a trapezoid, etc.), an elliptical shape, a waist-circular shape, an irregular shape, or the like.

[0131] When multiple first airways 10a1 are provided in the interior of the aerosol generating substrate 10, the cross-sectional area and the cross-sectional shape of each of the first airways 10a1 may be set as needed.

[0132] Exemplarily, referring to FIG. 4, the cross-sectional areas of all the first airways 10a1 may be exactly the same, and the cross-sectional shapes of all the first airways 10a1 may also be exactly the same.

[0133] Exemplarily, referring to FIG. 25, among all of the first airways 10a1, at least one first airway 1 10a1 may have a cross-sectional area different from the cross-sectional areas of the other first airways 10a1. In other words, the cross-sectional areas of the first airways 10a1 in the same aerosol generating substrate 10 may not be exactly the same.

[0134] Exemplarily, referring to FIGS. 9, 10, and 12 to 14, among the multiple first airways 10a1, at least one first airway 10a1 may have a cross-sectional shape different from the cross-sectional shapes of the other first airways 10a1. In other words, the cross-sectional shapes of the first airways 10a1 in the same aerosol generating substrate 10 may not be exactly the same.

[0135] The second airway 10a2 may be formed in various manners. Exemplarily, referring to FIG. 23, the aerosol generating substrate 10 may include a main body part 11 and multiple protruding parts 12. The multiple protruding parts 12 may be disposed at intervals on the peripheral side of the main body part 11, and the second airway 10a2 is formed at the interval between two adjacent protruding parts 12.

[0136] There may be two or more protruding parts 12, as long as the second airway 10a2 can be formed at the interval between two adjacent protruding parts 12.

[0137] Exemplarily, referring to FIGS. 21 and 22, a portion of the outer surface of the aerosol generating substrate 10 may be recessed to form the second airway 10a2. The aerosol generating substrate 10 in which the second airway 10a2 is formed by recesses is different from the aerosol generating substrate 10 in which the second airway 10a2 is formed by the protruding parts 12 in that: the aerosol generating substrate 10 in which the second airway 10a2 is formed by recesses does not have the distinct main body part 11 and multiple protruding parts 12.

[0138] The cross-sectional shape of the second airway 10a2 formed at the interval between two adjacent protruding parts 12 and the cross-sectional shape of the second airway 10a2 formed by the portion of the outer surface of the aerosol generating substrate 10 to be recessed are not limited. For example, the cross-sectional shape of the second airway 10a2 may be one of the following: a semicircular shape, a semielliptical shape, a polygonal shape (including but not limited to a triangle, a square, a prism shape, a trapezoid, etc.), and an irregular shape.

[0139] The second airway 10a2 formed at the interval between two adjacent protruding parts 12 and the second airway 10a2 formed by the portion of the outer surface of the aerosol generating substrate 10 to be recessed can increase the surface area of the aerosol generating substrate 10, as well as increase the number of the airways 10a on the surface of the aerosol generating substrate 10. This can facilitate the rapid release of the aerosol, at the same time, enhance the heat conduction efficiency, which is more conductive to the extraction of active ingredients and the sensory consistency. In addition, if circumferential heating is employed, the user's inhalation experience feeling can be improved by adjusting the heating rate.

[0140] Exemplarily, referring to FIG. 24, the aerosol generating substrate 10 may have a spiral shape with multiple turns, and two adjacent turns of the aerosol generating substrate 10 may be disposed at an interval to form the second airway 10a2 at the interval.

[0141] In the aerosol generating substrate 10 having the spiral shape with multiple turns, the second airway 10a2 may also have a spiral shape. The heat conduction of the second airway 10a2 having the spiral shape can be more uniform, which is conductive to the sensory consistency.

[0142] Additionally, if the first airway 10a1 is disposed in the interior of the aerosol generating substrate 10 having the spiral shape, the release and extraction of the aerosol can be further enhanced, which can improve the utilization rate of the aerosol generating substrate 10.

[0143] Furthermore, for the aerosol generating substrate 10 in which the multiple first airways 10a1 extends from one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1, these first airways 10a1 may be arranged in multiple manners, and the following embodiments will be described by way of example. It should be noted that the first airway(s) 10a1 described in the following embodiments may be the first airway 10a1 extending from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. This does not mean that all of the first airways 10a1 in the interior of the aerosol generating substrate 10 can only extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. In some embodiments, the interior of the aerosol generating substrate 10 may also be provided with the first airways 10a1 extending from the one end to the opposite end of the aerosol generating substrate 10 in other directions.

[0144] In one embodiment, referring to FIGS. 4 and 11, the multiple first airways 10a1 may be arranged to form multiple trajectory lines. Herein, each of the first airways 10a1 in a single trajectory line may be linearly arranged in a second direction Z2, and the multiple trajectory lines may be arranged in a third direction Z3. The second direction Z2 and the third direction Z3 may intersect, and the plane in which the second direction Z2 and the third direction Z3 are located may be perpendicular to the first direction Z1.

[0145] Exemplarily, referring to FIG. 4, each of the first airways 10a1 in the single trajectory line may be linearly arranged in the second direction Z2, and the multiple trajectory lines may be arranged in the third direction Z3 perpendicular to the second direction Z2. In other words, the multiple first airways 10a1 may be arranged in a matrix pattern shown in FIG. 13. In some other embodiments, the first airways 10a1 may also be arranged in a grid pattern shown in FIG. 16.

[0146] Exemplarily, referring to FIG. 11, each of the first airways 10a1 in the single trajectory line may be arranged in a circumferential direction around the center of the aerosol generating substrate 10, and multiple trajectory lines may be arranged in a radial direction of the aerosol generating substrate 10.

[0147] The circumferential direction around the center of the aerosol generating substrate 10 may be regarded to be corresponding to the second direction Z2, and the radial direction of the aerosol generating substrate 10 may be regarded to be corresponding to the third direction Z3. In other words, the multiple first airways 10a1 may be arranged in an annular pattern.

[0148] Referring to FIG. 4, each of the first airways 10a1 in the multiple trajectory lines may be uniformly distributed. That is, all of the first airways 10a1 are identical, the first airways 10a1 in the single trajectory line are arranged at equal intervals, and the multiple trajectory lines are also arranged at equal intervals.

[0149] The uniform distribution of each of the first airways 10a1 can enable the mass per unit volume of the region in which the aerosol generating substrate 10 is provided with the first airways 10a1 to be relatively uniform. As such, during the heating and inhalation process, the uniformity of the aerosol released by the aerosol generating substrate 10 can be better improved, thereby improving the inhalation consistency.

[0150] In some other embodiments, each of the first airways 10a1 in the multiple trajectory lines may be non-uniformly distributed. The non-uniformly distributed first airways 10a1, in combination with different heating manners, can achieve uniform heating of the aerosol generating substrate 10, and also achieve the consistency of the aerosol in the initial and subsequent puffs.

[0151] For example, taking the multiple first airways 10a1 arranged in the annular pattern as an example, exemplarily referring to FIG. 25, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The repeated arrangement means that each of the first airways 10a1 in the same row of airways 10a is exactly the same. The cross-sectional area of the first airway 10a1 in each trajectory line may gradually increase from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the cross-sectional areas of the first airways 10a1 in different trajectory lines may be different; and the cross-sectional area of the first airway 10a1 becomes larger as it is farther away from the center of the aerosol generating substrate 10.

[0152] Exemplarily, referring to FIG. 26, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The spacing between the first airways 10a1 in two adjacent trajectory lines may gradually decrease from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the multiple trajectory lines are not arranged at the equal intervals; and the spacing between the first airways 10a1 in two adjacent trajectory lines becomes smaller as it is farther away from the center of the aerosol generating substrate 10.

[0153] For both the aerosol generating substrate 10 where the cross-sectional area of the first airway 10a1 increases with the distance from the center of the aerosol generating substrate 10 to be larger, as well as the aerosol generating substrate 10 where the spacing between the first 10a1 in two adjacent trajectory lines decreases with the distance from the center of the aerosol generating substrate 10 to be larger, the closer to the central region of the aerosol generating substrate 10, the larger the mass per unit volume of the aerosol generating substrate 10. When such two types of aerosol generating substrates 10 are adapted to the central heating manner, the time required for heat conduction from the inside to the outside is longer, thereby prolonging the time for heating the position of the outer side wall of the aerosol generating substrate 10, which can improve the uniformity of the aerosol released by the aerosol generating substrate 10, increase the inhalation duration / the number of puffs, and at the same time, maintain the consistency of the aerosol release, and bring a comfortable inhalation experience to the user.

[0154] Continuing to take the multiple first airways 10a1 arranged in the annular pattern as an example, exemplarily referring to FIG. 27, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The cross-sectional areas of the first airways 10a1 in each trajectory line may gradually decrease from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the cross-sectional areas of the first airways 10a1 in different trajectory lines may be different; and the cross-sectional area of the first airway 10a1 becomes smaller as it is farther away from the center of the aerosol generating substrate 10.

[0155] Exemplarily, referring to FIG. 28, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The spacing between the first airways 10a1 in two adjacent trajectory lines may gradually increase from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the multiple trajectory lines are not arranged at the equal intervals; and the spacing between the first airways 10a1 in two adjacent trajectory lines becomes larger as it is farther away from the center of the aerosol generating substrate 10.

[0156] For both the aerosol generating substrate 10 where the cross-sectional area of the first airway 10a1 decreases with the distance from the center of the aerosol generating substrate 10 to be larger, as well as the aerosol generating substrate 10 where the spacing between the first airways 10a1 in two adjacent trajectory lines increases with the distance from the center of the aerosol generating substrate 10 to be larger, the closer to the outer side wall of the aerosol generating substrate 10, the larger the mass per unit volume of the aerosol generating substrate 10. When such two types of aerosol generating substrates 10 are adapted to the circumferential heating manner, the time required for heat conduction from the outside to the inside is longer, thereby prolonging the time for heating the position of the center of the aerosol generating substrate 10, which can improve the uniformity of the aerosol released by the aerosol generating substrate 10, increase the inhalation duration / the number of puffs, and at the same time, maintain the consistency of the aerosol release, and bring a comfortable inhalation experience to the user.

[0157] It should be noted that the non-uniform distribution of the first airways 10a1 in the multiple trajectory lines is not limited to the four patterns described above, and various adjustments may be made as needed. For example, the spacing between the first airways 10a1 in the single trajectory line may be changed, and the cross-sectional shapes of the first airways 10a1 in different rows may also be changed. The aforementioned implementations involving the changes in the cross-sectional area may be combined with the implementations involving the changes in the spacing, and the like.

[0158] Furthermore, for the multiple trajectory lines arranged in a non-annular pattern, such as the arrangement shown in FIGS. 4 and 8, the multiple trajectory lines may be arranged in the non-uniform distribution manner described in the aforementioned embodiments.

[0159] In some embodiments, the multiple first airways 10a1 in the interior of the aerosol generating substrate 10 may also be randomly distributed. Herein, among the multiple first airways 10a1 that are randomly distributed, the cross-sectional shape of each of the first airways 10a1 may be exactly the same, or the cross-sectional shapes of at least two of the first airways 10a1 may be different. Similarly, the cross-sectional area of each of the first airways 10a1 may be exactly the same, or the cross-sectional areas of at least two of the first airways 10a1 may be different.

[0160] Additionally, for the aerosol generating substrate 10 in which the multiple first airways 10a1 are provided, whether the first airways 10a1 are arranged in multiple trajectory lines or randomly distributed, in one embodiment, referring to FIGS. 16 to 20, each of the first airways 10a1 may be distributed in a respective region of the interior of the aerosol generating substrate 10. In other words, the first airways 10a1 may be provided in substantially every region of the interior of the aerosol generating substrate 10, with no significant region(s) lacking the first airway(s) 10a1.

[0161] In another embodiment, referring to FIG. 8, the interior of the aerosol generating substrate 10 may have a first region 10b and a second region 10c, and each of the first airways 10a1 may be distributed in the first region 10b. That is, the first airway(s) 10a1 may be disposed only in the first region 10b, and the first airway 10a1 may not be disposed in the second region 10c. Here, the number and positions of the first region(s) 10b and the second region(s) 10c may be determined as needed, which are not limited herein.

[0162] In one embodiment, referring to FIG. 12, the interior of the aerosol generating substrate 10 may have a third region 10d and a fourth region 10e surrounding the outer peripheral side of the third region 10d. A portion of the first airways 10a1 may be distributed in the third region 10d, and another portion of the first airways 10a1 may be distributed in the fourth region 10e. Herein, each of the first airways 10a1 located in the third region 10d may have the same cross-sectional shape and the same cross-sectional area, and a cross-sectional shape of at least one of the first airways 10a1 located in the fourth region 10e may be a portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d. In other words, the interior of the aerosol generating substrate 10 has at least two types of first airways 10a1 with the different cross-sectional shapes; and the distinct cross-sectional shape of the first airway 10a1 in the fourth region 10e is a portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d.

[0163] Due to the certain limitation on the dimensions of the aerosol generating substrate 10, the cross-sectional shape of at least one first airway 10a1 located in the fourth region 10e is the portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d; as such, the cross-sectional area and the cross-sectional shape of each first airway 10a1 can be flexibly designed. Therefore, it can not only facilitate the adjustment of the resistance to draw when inhaling by the user, but also facilitate the adjustment of the mass distribution at different positions of the aerosol generating substrate 10, which can enable the heating rate and the heating uniformity to be better enhanced, and the inhalation experience feeling to be better improved.

[0164] In the description of the present disclosure, references to the terms such as “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in yet other embodiments”, or “exemplary” or the like mean that the specific feature, structure, material or characteristic described in connection with the embodiment or example may be included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine different embodiments or examples as well as the features in different embodiments or examples described in the present disclosure unless they are not contradictory to each other.

[0165] The foregoing is merely the preferred embodiments of the present disclosure, and is not intended to limit the present disclosure. Various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Examples

Embodiment Construction

[0075]Embodiments of the present disclosure provide an aerosol generating article. Referring to FIGS. 1 to 28, the aerosol generating article includes an aerosol generating substrate 10.

[0076]The aerosol generating article may be configured to be used in conjunction with an aerosol generating device that includes a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate 10 to generate the aerosol, for inhalation by the user or for use in medicine, cosmetics, etc.

[0077]The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner and a peripheral heating manner. The center heating manner refers to a manner of inserting the heating component to the interior of the aerosol generating article, to bake and heat the aerosol generating article from the inside to the outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol ge...

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of International Patent Application No. PCT / CN2024 / 119732 filed on Sep. 19, 2024, which is based on and claims priority to Chinese Patent Application No. 202311308739.4 filed on Oct. 10, 2023. International Patent Application No. PCT / CN2024 / 119732 and Chinese Patent Application No. 202311308739.4 are incorporated by reference in their entireties.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of smoke generating articles, and in particular to an aerosol generating substrate and an aerosol generating article.BACKGROUND

[0003] An aerosol generating article typically generates an aerosol in a heat-not-burn manner. Specifically, an aerosol generating substrate is provided in the aerosol generating article, and the aerosol generating substrate is heated by an external heat source, such as a heating component on an aerosol generating device, so that the aerosol generating substrate is heated to a degree just enough to release a fragrance. The aerosol generating substrate does not burn, but is loaded with an atomization agent. During the usage, the atomization agent is released by heating and the related substances are also released by heating of the substrate itself (where the atomization agent may be not necessary) to form a smoke.

[0004] In related technologies, there are three types of aerosol generating substrates: granular type, traditional tobacco type, and flake type. Such aerosol generating substrates have characteristics of a relatively low efficiency in aerosol extraction and a relatively poor inhalation experience feeling.SUMMARY

[0005] In view of the above, the embodiments of the present disclosure are expected to provide an aerosol generating substrate and an aerosol generating article capable of improving the inhalation experience feeling.

[0006] In order to achieve the above objectives, an embodiment of the present disclosure provides an aerosol generating substrate. The aerosol generating substrate is an integral structure having one or more airways; among all of the airways, at least one airway extends from one end to an opposite end of the aerosol generating substrate in a first direction, and at least one end of two opposite ends of each of the airways in an extending direction is an open end.

[0007] Herein, a bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or,

[0008] a true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or,

[0009] a porosity of the aerosol generating substrate is 5% to 95%.

[0010] In one embodiment, the bulk density is 0.40 g / cm3 to 1.10 g / cm3.

[0011] In one embodiment, the true density is 1.1 g / cm3 to 1.4 g / cm3.

[0012] In one embodiment, the porosity is 40% to 75%.

[0013] In one embodiment, the two opposite ends of each of the airways in the extending direction are open ends.

[0014] In one embodiment, the airways include at least one of a first airway and a second airway, the first airway is located in an interior of the aerosol generating substrate, and the second airway is located in an exterior of the aerosol generating substrate.

[0015] In one embodiment, a cross-sectional shape of the first airway is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

[0016] In one embodiment, a plurality of the first airways are disposed in the interior of the aerosol generating substrate, and among all of the first airways, at least one first airway has a cross-sectional area different from cross-sectional areas of other first airways.

[0017] In one embodiment, a plurality of the first airways are disposed in the interior of the aerosol generating substrate, and among all of the first airways, at least one of first airway has a cross-sectional shape different from cross-sectional shapes of other first airways.

[0018] In one embodiment, the aerosol generating substrate includes a main body part and a plurality of protruding parts, the protruding parts are disposed at intervals on a peripheral side of the main body part, and the second airway is formed at an interval between two adjacent protruding parts.

[0019] In one embodiment, a portion of an outer surface of the aerosol generating substrate is recessed to form the second airway.

[0020] In one embodiment, a cross-sectional shape of the second airway is one of the following: a semicircular shape, a semielliptical shape, a polygonal shape, and an irregular shape.

[0021] In one embodiment, the aerosol generating substrate has a spiral shape with a plurality of turns, and two adjacent turns of the aerosol generating substrate are disposed at an interval to form the second airway in the interval.

[0022] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction.

[0023] The plurality of first airways are arranged to form a plurality of trajectory lines, each of the first airways in a single trajectory line is linearly arranged in a second direction, the plurality of trajectory lines are arranged in a third direction, the second direction and the third direction intersect, and a plane in which the second direction and the third direction are located is perpendicular to the first direction.

[0024] In one embodiment, each of the first airways in the plurality of trajectory lines is uniformly distributed.

[0025] In one embodiment, each of the first airways in the single trajectory line is linearly arranged in the second direction, and the plurality of trajectory lines are arranged in the third direction that is perpendicular to the second direction.

[0026] In one embodiment, each of the first airways in the single trajectory line is arranged in a circumferential direction around a center of the aerosol generating substrate, and the plurality of trajectory lines are arranged in a radial direction of the aerosol generating substrate.

[0027] In one embodiment, each of the first airways in the single trajectory line is repeatedly arranged; and a cross-sectional area of the first airway in each trajectory line gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction.

[0028] In one embodiment, each of the first airways in the single trajectory line is repeatedly arranged; and a spacing between the first airways in two adjacent trajectory lines gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction.

[0029] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, and each of the first airways is randomly distributed.

[0030] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, and each of the first airways is distributed in a respective region of the interior of the aerosol generating substrate.

[0031] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, the interior of the aerosol generating substrate has a first region and a second region, and each of the first airways is distributed in the first region.

[0032] In one embodiment, the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction.

[0033] The interior of the aerosol generating substrate has a third region and a fourth region surrounding an outer peripheral side of the third region, a portion of the first airways are distributed in the third region, and another portion of the first airways are distributed in the fourth region, wherein each of the first airways located in the third region has the same cross-sectional shape and the same cross-sectional area, and a cross-sectional shape of at least one of the first airways located in the fourth region is a portion of the cross-sectional shape of the first airways located in the third region.

[0034] In one embodiment, the airway is a straight-through airway extending along a straight line.

[0035] In one embodiment, the airway is a spiral airway, and at least partial region of the spiral airway in the extending direction has a curvilinear shape with a non-zero curvature.

[0036] In one embodiment, a cross-sectional shape of the aerosol generating substrate perpendicular to the first direction is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

[0037] In one embodiment, the aerosol generating substrate has a columnar shape, and the first direction is an elongation direction of the aerosol generating substrate.

[0038] Another embodiment of the present disclosure provides an aerosol generating article, which includes:

[0039] the aerosol generating substrate described above;

[0040] a functional segment, disposed at the one end of the aerosol generating substrate in the first direction, and the functional segment at least including a cooling segment; and

[0041] an outer wrapping layer, wrapped around outer peripheral sides of the functional segment and the aerosol generating substrate.

[0042] In one embodiment, the functional segment further comprises a filtering segment, and the cooling segment is located between the filtering segment and the aerosol generating substrate.

[0043] Embodiments of the present disclosure provide the aerosol generating substrate and the aerosol generating article. Herein, the aerosol generating substrate is the integral structure having one or more airways; among all of the airways, at least one airway extends from one end to the opposite end of the aerosol generating substrate in the first direction, and at least one end of two opposite ends of each of the airways in the extending direction is the open end. The bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or, the true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or, the porosity of the aerosol generating substrate is 5% to 95%. The mass of the aerosol generating substrate is moderate. During the heating process, the heating rate of the aerosol generating substrate 10 can be effectively increased, which enables the aerosol to be released rapidly and uniformly. At the same time, the resistance to draw of inhalation of the aerosol generating substrate 10 can also be maintained within an appropriate range, such that the fluidity of the aerosol is good and is not easily diluted by air. Therefore, the inhalation experience feeling can be better improved.BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG. 1 is a schematic structural diagram of a first aerosol generating substrate according to an embodiment of the present disclosure.

[0045] FIG. 2 is a schematic structural diagram of a second aerosol generating substrate according to an embodiment of the present disclosure.

[0046] FIG. 3 is a schematic structural diagram of a third aerosol generating substrate according to an embodiment of the present disclosure.

[0047] FIG. 4 is a schematic structural diagram of a fourth aerosol generating substrate according to an embodiment of the present disclosure.

[0048] FIG. 5 is a cross-sectional diagram of the aerosol generating substrate shown in FIG. 4.

[0049] FIG. 6 is a cross-sectional diagram of a fifth aerosol generating substrate according to an embodiment of the present disclosure.

[0050] FIG. 7 is a cross-sectional diagram of a sixth aerosol generating substrate according to an embodiment of the present disclosure.

[0051] FIG. 8 is a cross-sectional diagram of a seventh aerosol generating substrate according to an embodiment of the present disclosure.

[0052] FIG. 9 is a schematic structural diagram of an eighth aerosol generating substrate according to an embodiment of the present disclosure.

[0053] FIG. 10 is a schematic structural diagram of a ninth aerosol generating substrate according to an embodiment of the present disclosure.

[0054] FIG. 11 is a schematic structural diagram of a tenth aerosol generating substrate according to an embodiment of the present disclosure.

[0055] FIG. 12 is a schematic structural diagram of an eleventh aerosol generating substrate according to an embodiment of the present disclosure.

[0056] FIG. 13 is a schematic structural diagram of a twelfth aerosol generating substrate according to an embodiment of the present disclosure.

[0057] FIG. 14 is a schematic structural diagram of a thirteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0058] FIG. 15 is a schematic structural diagram of a fourteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0059] FIG. 16 is a schematic structural diagram of a fifteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0060] FIG. 17 is a schematic structural diagram of a sixteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0061] FIG. 18 is a schematic structural diagram of a seventeenth aerosol generating substrate according to an embodiment of the present disclosure.

[0062] FIG. 19 is a schematic structural diagram of an eighteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0063] FIG. 20 is a schematic structural diagram of a nineteenth aerosol generating substrate according to an embodiment of the present disclosure.

[0064] FIG. 21 is a schematic structural diagram of a twentieth aerosol generating substrate according to an embodiment of the present disclosure.

[0065] FIG. 22 is a schematic structural diagram of a twenty-first aerosol generating substrate according to an embodiment of the present disclosure.

[0066] FIG. 23 is a schematic structural diagram of a twenty-second aerosol generating substrate according to an embodiment of the present disclosure.

[0067] FIG. 24 is a schematic structural diagram of a twenty-third aerosol generating substrate according to an embodiment of the present disclosure.

[0068] FIG. 25 is a schematic structural diagram of a twenty-fourth aerosol generating substrate according to an embodiment of the present disclosure.

[0069] FIG. 26 is a schematic structural diagram of a twenty-fifth aerosol generating substrate according to an embodiment of the present disclosure.

[0070] FIG. 27 is a schematic structural diagram of a twenty-sixth aerosol generating substrate according to an embodiment of the present disclosure.

[0071] FIG. 28 is a schematic structural diagram of a twenty-seventh aerosol generating substrate according to an embodiment of the present disclosure.

[0072] FIG. 29 is a schematic structural diagram of a first aerosol generating article according to an embodiment of the present disclosure.

[0073] FIG. 30 is a cross-sectional diagram of the aerosol generating article shown in FIG. 29.

[0074] FIG. 31 is a schematic structural diagram of a second aerosol generating article according to an embodiment of the present disclosure.DETAILED DESCRIPTION

[0075] Embodiments of the present disclosure provide an aerosol generating article. Referring to FIGS. 1 to 28, the aerosol generating article includes an aerosol generating substrate 10.

[0076] The aerosol generating article may be configured to be used in conjunction with an aerosol generating device that includes a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate 10 to generate the aerosol, for inhalation by the user or for use in medicine, cosmetics, etc.

[0077] The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner and a peripheral heating manner. The center heating manner refers to a manner of inserting the heating component to the interior of the aerosol generating article, to bake and heat the aerosol generating article from the inside to the outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol generating article, to bake and heat the aerosol generating article from the outside to the inside. Specifically, such heating manners can be applied by resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc.

[0078] The specific structure of the aerosol generating substrate 10 is not limited herein. Exemplarily, in one embodiment, the aerosol generating substrate 10 may be made of an atomization medium per se, and for example, may be made of an aerosol generating fragrant medium. In some other embodiments, the aerosol generating substrate 10 may include a substrate body and an atomization medium disposed on the substrate body, and the substrate body may be, for example, a high-temperature resistant carbon fiber. Thus, through the arrangement of the substrate body, the strength of the aerosol generating substrate 10 can be enhanced, and the high temperature to a certain degree may be borne without generating peculiar smell.

[0079] The specific ingredient of the aerosol generating substrate 10 is not limited herein. Exemplarily, in one embodiment, the aerosol generating substrate 10 may include a plant ingredient, an auxiliary ingredient, a smoke-generating agent ingredient, a binder ingredient, etc.

[0080] In one embodiment, the plant ingredient is one or a combination of several types of powder formed by performing crushing treatment on tobacco raw materials, tobacco fragments, tobacco stems, tobacco powder, fragrant plants, etc. The plant ingredient is the core source of the fragrance of the article. Endogenous substances in the plant ingredient, such as nicotine, enter the human bloodstream through atomization, which promotes the pituitary gland to produce dopamine, thus achieving physiological satisfaction.

[0081] In one embodiment, the auxiliary ingredient may be one or a combination of several materials of an inorganic filler, a lubricating agent and an emulsifying agent. Herein, the inorganic filler includes one or a combination of several materials of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talcum powder and diatomite. The inorganic filler may provide a skeleton supporting effect for the plant ingredient, at the same time, the inorganic filler also has micro holes, and the wall material porosity after the plant ingredient is formed can be enhanced, so that the aerosol release rate can be improved.

[0082] The lubricating agent includes one or a combination of several materials of candelilla wax, Brazil wax, shell-lac, helianthus annuus wax, rice bran, beeswax, stearic acid and palmic acid. The lubricating agent may increase the fluidity of granules, decrease the friction among the granules, enable the integral granule distribution density to be uniform, reduce the pressure required for mold forming, and reduce the mold abrasion.

[0083] The emulsifying agent includes one or a combination of several materials of polyglycerol fatty acid ester, Tween-80 and polyvinyl alcohol. The emulsifying agent may slow down the loss of a fragrant substance during the storage process to a certain degree, enhance the stability of the fragrant substance, and improve the sensory quality of the article. The emulsifying agent (also referred to as a surfactant) can reduce the interfacial tension between water-soluble and water-insoluble components in the mixed system, and further form a robust film on a droplet surface or form a double electric layer on the droplet surface due to the charge(s) given by the emulsifier, which can prevent the droplet coalescence and maintain a uniform emulsion. Emulsification and homogenization of two immiscible components can improve the consistency of article quality.

[0084] The smoke-generating agent ingredient has a function of generating a great amount of steam when being heated, so that the aerosol volume of the smoke generating article can be improved. In one embodiment, the smoke-generating agent may include one or a combination of several materials of monohydric alcohol (such as menthol); polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol); ester of polyhydric alcohol (such as gylcerol monoacetate, diacetin, or glyceryl triacetate); monocarboxylic acid; and polybasic carboxylic acid (such as lauric acid, and myristic acid) or aliphatic ester of polybasic carboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a diacetin mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glycerin tributyrate, and lauryl acetate).

[0085] In one embodiment, the binder ingredient is extracted from natural plants, and is non-ionized modified viscous polysaccharide including one or a combination of several materials of tamarind polysaccharide, Pullulan, algal polysaccharide, locust bean gum, guar gum, and xyloglucan. The binder is in close contact with the interface of the ingredient material of the article by wetting, resulting in intermolecular attraction, thereby playing the role of binding the powder, liquid, etc. of the ingredient material. At the same time, the natural plants may be selected. In addition, the extraction and non-ionization of the binder can prevent the release of harmful substances such as methanol, formaldehyde, and acrolein caused by colloid modification, which can improve the safety of articles.

[0086] With continued reference to FIGS. 1 to 28, the aerosol generating substrate 10 is an integral structure. Exemplarily, the aerosol generating substrate 10 may be a particulate conjugate, which is a recombined tobacco medium, for example, a recombined tobacco medium containing ingredients such as a smoke-generating agent, a tobacco, and the like.

[0087] The aerosol generating substrate 10 may be formed into an integral structure by a process such as injection molding, compression molding, extrusion, casting, and rolling. Here, the extrusion process refers to a processing method where the raw material mixture is added into an extruder, the material is pushed forward by the screw through the action between the extruder barrel and the screw, and continuously passes through the die head to form articles or semi-finished articles of various cross sections.

[0088] Since the aerosol generating substrate 10 remains the integral structure whether subjected to heat inhalation or after heat cessation, and the phenomenon of disintegration and falling is not easy to occur. This addresses issues presented in the existing flake-like, filamentous or loose-particle aerosol generating substrate 10 such as flake detachment, filamentous or particle components falling off, and difficulty in cleaning.

[0089] With continued reference to FIGS. 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 may be a circle shape shown in FIG. 1, a polygonal shape (including but not limited to: a triangle shown in FIG. 18, a square shown in FIG. 19, a hexagon shown in FIG. 20, a prism shape, a trapezoid shape, and the like), an elliptical shape shown in FIG. 16, a waist-circular shape shown in FIG. 17, an irregular shape shown in FIGS. 21 to 24, and the like. Herein, the waist-circular shape refers to a closed shape formed by bisecting a circle into two semicircular arcs through the center of the circle and translating in opposite directions to each other, and connecting the endpoints of the two semicircular arcs with two parallel lines of the equal length. The irregular shape refers to a symmetric or asymmetric shape other than the shapes listed above, such as a snowflake shape.

[0090] With continued reference to FIGS. 1 to 28, the aerosol generating substrate 10 has one or more airways 10a. That is, there may be one airway 10a or multiple airways 10a. At least one end of the two opposite ends of the airway 10a in the extending direction is an open end. The open end refers to an end of the airway 10a that communicates with the outside.

[0091] Exemplarily, referring to FIG. 5, both two opposite ends of the airway 10a in the extension direction may be open ends.

[0092] Exemplarily, referring to FIG. 6, one end of the two opposite ends of the airway 10a in the extending direction may be the open end, and the another end may be a closed end that does not communicate with the outside.

[0093] Exemplarily, when multiple airways 10a are provided, one of the following may be implemented: both two opposite ends of all of the airways 10a in the extending direction may be open ends; one end of the two opposite ends of all of the airways 10a in the extending direction may be the open end, and another end may be the closed end; or, both two opposite ends of a portion of the airways 10a in the extending direction may be open ends, as well as one end of the two opposite ends of another portion of the airways 10a in the extending direction may be the open end, and the another end of the another portion of the airways 10a may be the closed end.

[0094] With continued reference to FIGS. 1 to 28, among all of the airways 10a, at least one airway 10a extends from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1.

[0095] The first direction Z1 may be any direction of the aerosol generating substrate 10. For example, as shown in FIG. 1, the first direction Z1 may be a height direction of the aerosol generating substrate 10. In other embodiments, the first direction Z1 may be a length direction or a width direction of the aerosol generating substrate 10 (where the height direction, the length direction, and the width direction are perpendicular to each other; and for the aerosol generating substrate 10 with a circular cross-sectional shape perpendicular to the first direction Z1, the length direction and the width direction correspond to two mutually perpendicular directions on the circular surface). Additionally, the first direction Z1 may be inclined with respect to at least two of the length direction, the width direction and the height direction of the aerosol generating substrate 10.

[0096] If the aerosol generating substrate 10 is provided with only one airway 10a, the airway 10a is required to extend from one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. If the aerosol generating substrate 10 is provided with multiple airways 10a, all of the airways 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1; or, one or a portion of the airways 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1, and the other airway(s) 10a may extend from the one end to the opposite end of the aerosol generating substrate 10 in the other direction(s). Herein, the other direction(s) may refer to any direction not parallel to the first direction Z1.

[0097] Exemplarily, referring to FIGS. 1 to 28, the aerosol generating substrate 10 may have a columnar shape, and the first direction Z1 may be an elongation direction of the aerosol generating substrate 10.

[0098] In other some embodiments, the aerosol generating substrate 10 may also have a sheet shape.

[0099] With continued reference to FIGS. 1 to 28, the airways 10a may be disposed in an interior of the aerosol generating substrate 10 or an exterior of the aerosol generating substrate 10. When there are multiple airways 10a, one of the following may be implemented: all of the airways 10a may be disposed in the interior of the aerosol generating substrate 10; all of the airways 10a may be disposed in the exterior of the aerosol generating substrate 10; or, a portion of the airways 10a may be disposed in the interior of the aerosol generating substrate 10, and another portion of the airways 10a may be disposed in the exterior of the aerosol generating substrate 10. The specific arrangement manner of the airways 10a is described in detail in the following embodiments. It should be noted that the airway 10a located in the interior of the aerosol generating substrate 10 means that the peripheral side of the airway 10a is surrounded by the substrate material, that is, the inner side surface of the airway 10a are made of the substrate material, and the cross section of the airway 10a has a closed shape. In addition, the airway 10a located in the exterior of the aerosol generating substrate 10 means that one side of the airway 10a is a notch in communication with the outside, formed by an opening of the matrix medium material, that is, the cross section of the airway 10a has a non-closed shape.

[0100] With continued reference to FIGS. 5 and 15, the airway 10a may be a straight-through airway as shown in FIG. 5, the straight-through airway is the airway extending along a straight line, or the extending direction of the straight-through airway is a straight line.

[0101] The airway 10a may be a spiral airway as shown in FIG. 15, the spiral airway is a curved airway where at least partial region of the airway in the extending direction has a non-zero curvature. For example, in the extending direction of the spiral airway, the spiral airway may have a structural form that includes both the curved segment with a non-zero curvature and the straight line segment with a zero curvature; or, the spiral airway may have a structural form that includes only the curved segment with the non-zero curvature and does not include the straight line segment with the zero curvature. In other words, from the starting point to the endpoint of the spiral airway in the extending direction, the spiral airway may just need not to extend along the straight line.

[0102] When there are multiple airways 10a, a portion of the airways 10a may be the straight-through airways, and the another portion of the airways 10a may be the spiral airways.

[0103] The airway 10a can prolong the airflow path and increase the flow speed of the airflow in the aerosol generating substrate 10, thereby enhancing the impact force of the airflow, which can enable the aerosol to be uniformly mixed. As such, the extraction efficiency and uniformity of the aerosol in the aerosol generating substrate 10 can be improved, and the inhalation feeling of the user can be also enhanced.

[0104] Referring to FIGS. 29 to 31, the aerosol generating article may be provided with a functional segment 20 and an outer wrapping layer 30. The functional segment 20 is disposed at one end of the aerosol generating substrate 10 in the first direction. The functional segment 20 at least includes a cooling segment 21 for reducing the temperature of the aerosol entering the mouth. The outer wrapping layer 30 is wrapped around the outer peripheral sides of the functional segment 20 and the aerosol generating substrate 10.

[0105] The functional segment 20 may be provided with only the cooling segment 21 as shown in FIG. 30, or the functional segment 20 may be provided with a filtering segment 22 and the cooling segment 21 as shown in FIG. 31. For the functional segment 20 provided with the cooling segment 21, the cooling segment 21 is disposed between the filtering segment 22 and the aerosol generating substrate 10, for performing a cooling processing on the aerosol before the filtering segment 22 filters the aerosol, thereby reducing the temperature of the aerosol and improving the phenomenon of “mouth burning sensation” experienced by the user when inhaling the aerosol.

[0106] The material of the cooling segment 21 includes, but is not limited to, one or more combinations of materials such as: polyethylene (PE), Polylactic acid (PLA, also referred to as polylactide), Poly butyleneadipate-co-terephthalate (PBAT), Polypropylene (PP), acetate fiber, and propylene fiber.

[0107] The material of the filtering segment 22 includes, but is not limited to, one or more combinations of materials such as: polyethylene (PE), Polylactic acid (PLA, also referred to as polylactide), Poly butyleneadipate-co-terephthalate (PBAT), Polypropylene (PP), acetate fiber, and propylene fiber.

[0108] The material of the cooling segment 21 and the filtering segment 22 may be the same or different.

[0109] It should be noted that the aerosol generating article relies on the aerosol generating substrate 10 to generate the aerosol, and the functional segment 20 is not used to generate the aerosol.

[0110] The material of the outer wrapping layer 30 is not limited. For example, the material of the outer wrapping layer 30 includes, 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.

[0111] 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.

[0112] Furthermore, according to the embodiments of the present disclosure, the bulk density of the aerosol generating substrate 10 may be 0.25 g / cm3 to 1.40 g / cm3 (inclusive of the endpoint values). For example, the bulk density may be 0.25 g / cm3, 0.40 g / cm3, 0.60 g / cm3, 0.80 g / cm3, 1.10 g / cm3, 1.20 g / cm3, 1.40 g / cm3, or the like.

[0113] More preferably, the bulk density of the aerosol generating substrate 10 may be 0.40 g / cm3 to 1.10 g / cm3.

[0114] The true density of the aerosol generating substrate 10 may be 1.0 g / cm3 to 1.6 g / cm3 (inclusive of the endpoint values). For example, the true density may be 1.0 g / cm3, 1.1 g / cm3, 1.2 g / cm3, 1.4 g / cm3, 1.6 g / cm3, or the like.

[0115] More preferably, the true density of the aerosol generating substrate 10 may be 1.1 g / cm3 to 1.4 g / cm3.

[0116] The porosity of the aerosol generating substrate 10 may be 5% to 95% (inclusive of the endpoint values). For example, the porosity may be 5%, 10%, 20%, 30%, 40%, 50%, 60%, 75%, 85%, 95%, and the like.

[0117] More preferably, the porosity of the aerosol generating substrate 10 may be 40% to 75%.

[0118] The bulk density refers to the ratio of the mass of the aerosol generating substrate 10 to the total volume of the aerosol generating substrate 10, where the total volume is the sum of the volume of the solid structure of the aerosol generating substrate 10, the volume of the airway(s) 10a, and the volume of the pore(s).

[0119] The airway 10a described in the embodiments of the present disclosure is different from the pore. The airway 10a is the hole in a macroscopic sense, and the pore is the hole in the microscopic sense. Dimensions such as the cross-sectional area and length of the airway 10a are much larger than those of the pore. Since the airway 10a is mainly formed by processing, dimensions such as the cross-sectional area and the length of the airway 10a can be changed according to design requirements, while dimensions such as the cross-sectional area and the length of the pore are mainly formed naturally during the processing.

[0120] Taking the cylindrical aerosol generating substrate 10 shown in FIG. 1 as an example, the bulk density of the aerosol generating substrate 10=mass M / volume V, where V=π×(D / 2)2×H. Here, D is the diameter of the cylindrical aerosol generating substrate 10, and H is the height of the cylindrical aerosol generating substrate 10.

[0121] The true density refers to the actual mass per unit volume of the aerosol generating substrate 10 in an absolutely compact state, i.e., the density after removing the airway(s) 10a and the pore(s). In other words, the volume herein does not include the volume of the airway(s) 10a and the pore(s).

[0122] The porosity refers to the ratio of the sum of the volumes of all airways 10a in the aerosol generating substrate 10 to the total volume of the aerosol generating substrate 10. Here, taking the cylindrical aerosol generating substrate 10 shown in FIG. 1 as an example, the airway 10a is located at the center of the aerosol generating substrate 10, the airway 10a extends in the Z1 direction and penetrates 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. The porosity=the volume of the airway 10a / the total volume of the aerosol generating substrate 10, i.e., the porosity=V1 / V =d2 / D2.

[0123] In other embodiments, taking the aerosol generating substrate 10 shown in FIG. 4 a an example, there are multiple airways 10a, and the porosity of the aerosol generating substrate 10 is the ratio of the sum of the volumes of the multiple airways 10a to the total volume of the aerosol generating substrate 10.

[0124] When the true density of the aerosol generating substrates 10 remains the same, the smaller the bulk density, the larger the porosity; and the larger the bulk density, the smaller the porosity. When the bulk density of the aerosol generating substrate 10 remains the same, the larger the true density, the smaller the porosity; and the smaller the true density, the larger the porosity.

[0125] Studies have found that when the bulk density is greater than 1.40 g / cm3, or the true density is greater than 1.6 g / cm3, or the porosity is less than 5%, the aerosol generating substrate 10 is relatively dense, which results in a relatively large mass but a relatively low utilization rate of the aerosol generating substrate 10. During the heating process, the heating rate of the aerosol generating substrate 10 is slow, the aerosol generation rate is slow, the preheating time is long, the inhalation consistency is poor, and the resistance of the aerosol flow is high (i.e., the resistance to draw of inhalation is large), which is not conducive to inhalation, and the user's inhalation experience feeling is poor.

[0126] When the bulk density is less than 0.25 g / cm3, or the true density is less than 1.10 g / cm3, or the porosity is greater than 95%, the mass of the aerosol generating substrate 10 is relatively small. During the heating process, the aerosol generating substrate 10 is prone to exhibit non-uniform aerosol release (e.g., the rapid release with a large amount of aerosol in the initial puffs, followed by the release with a less amount of aerosol in the subsequent puffs). In addition, since the aerosol generating substrate 10 is too loose, the resistance to draw of inhalation is small, causing the aerosol to be easily diluted by air (i.e., the inhaled aerosol contains excessive air), which reduces the aerosol concentration, and affects the user's inhalation experience feeling.

[0127] According to the embodiments of the present disclosure, the bulk density of the aerosol generating substrate 10 is 0.25 g / cm3 to 1.40 g / cm3, the true density of the aerosol generating substrate 10 is 1.0 g / cm3 to 1.6 g / cm3, the porosity of the aerosol generating substrate 10 is 5% to 95%. Thus, the mass of the aerosol generating substrate 10 is moderate. During the heating process, the heating rate of the aerosol generating substrate 10 can be effectively increased, which enables the aerosol to be released rapidly and uniformly. At the same time, the resistance to draw of inhalation of the aerosol generating substrate 10 is also be maintained within an appropriate range, such that the fluidity of the aerosol is good and is not easily diluted by air. Therefore, the inhalation experience feeling can be better improved.

[0128] Referring to FIGS. 1 to 28, for convenience of description, for the airways 10a disposed in the interior or the exterior of the aerosol generating substrate 10, the airways 10a located at different positions may be referred to as the first airway(s) 10a1 and the second airway(s) 10a2, respectively. Herein, the first airway 10a1 is located in the interior of the aerosol generating substrate 10, and the second airway 10a2 is located in the exterior of the aerosol generating substrate 10.

[0129] The aerosol generating substrate 10 may be provided with only the first airway(s) 10a1 as shown in FIGS. 1 to 20, or may be provided with only the second airway(s) 10a2 as shown in FIG. 21, or may be provided with both the first airway(s) 10a1 and the second airway(s) 10a2 as shown in FIGS. 22 and 23.

[0130] The cross-sectional shape of the first airway 10a1 is not limited. For example, the cross-sectional shape of the first airway 10a1 may be a circular shape, a polygonal shape (including, but not limited to a triangle, a square, a prism shape, a trapezoid, etc.), an elliptical shape, a waist-circular shape, an irregular shape, or the like.

[0131] When multiple first airways 10a1 are provided in the interior of the aerosol generating substrate 10, the cross-sectional area and the cross-sectional shape of each of the first airways 10a1 may be set as needed.

[0132] Exemplarily, referring to FIG. 4, the cross-sectional areas of all the first airways 10a1 may be exactly the same, and the cross-sectional shapes of all the first airways 10a1 may also be exactly the same.

[0133] Exemplarily, referring to FIG. 25, among all of the first airways 10a1, at least one first airway 1 10a1 may have a cross-sectional area different from the cross-sectional areas of the other first airways 10a1. In other words, the cross-sectional areas of the first airways 10a1 in the same aerosol generating substrate 10 may not be exactly the same.

[0134] Exemplarily, referring to FIGS. 9, 10, and 12 to 14, among the multiple first airways 10a1, at least one first airway 10a1 may have a cross-sectional shape different from the cross-sectional shapes of the other first airways 10a1. In other words, the cross-sectional shapes of the first airways 10a1 in the same aerosol generating substrate 10 may not be exactly the same.

[0135] The second airway 10a2 may be formed in various manners. Exemplarily, referring to FIG. 23, the aerosol generating substrate 10 may include a main body part 11 and multiple protruding parts 12. The multiple protruding parts 12 may be disposed at intervals on the peripheral side of the main body part 11, and the second airway 10a2 is formed at the interval between two adjacent protruding parts 12.

[0136] There may be two or more protruding parts 12, as long as the second airway 10a2 can be formed at the interval between two adjacent protruding parts 12.

[0137] Exemplarily, referring to FIGS. 21 and 22, a portion of the outer surface of the aerosol generating substrate 10 may be recessed to form the second airway 10a2. The aerosol generating substrate 10 in which the second airway 10a2 is formed by recesses is different from the aerosol generating substrate 10 in which the second airway 10a2 is formed by the protruding parts 12 in that: the aerosol generating substrate 10 in which the second airway 10a2 is formed by recesses does not have the distinct main body part 11 and multiple protruding parts 12.

[0138] The cross-sectional shape of the second airway 10a2 formed at the interval between two adjacent protruding parts 12 and the cross-sectional shape of the second airway 10a2 formed by the portion of the outer surface of the aerosol generating substrate 10 to be recessed are not limited. For example, the cross-sectional shape of the second airway 10a2 may be one of the following: a semicircular shape, a semielliptical shape, a polygonal shape (including but not limited to a triangle, a square, a prism shape, a trapezoid, etc.), and an irregular shape.

[0139] The second airway 10a2 formed at the interval between two adjacent protruding parts 12 and the second airway 10a2 formed by the portion of the outer surface of the aerosol generating substrate 10 to be recessed can increase the surface area of the aerosol generating substrate 10, as well as increase the number of the airways 10a on the surface of the aerosol generating substrate 10. This can facilitate the rapid release of the aerosol, at the same time, enhance the heat conduction efficiency, which is more conductive to the extraction of active ingredients and the sensory consistency. In addition, if circumferential heating is employed, the user's inhalation experience feeling can be improved by adjusting the heating rate.

[0140] Exemplarily, referring to FIG. 24, the aerosol generating substrate 10 may have a spiral shape with multiple turns, and two adjacent turns of the aerosol generating substrate 10 may be disposed at an interval to form the second airway 10a2 at the interval.

[0141] In the aerosol generating substrate 10 having the spiral shape with multiple turns, the second airway 10a2 may also have a spiral shape. The heat conduction of the second airway 10a2 having the spiral shape can be more uniform, which is conductive to the sensory consistency.

[0142] Additionally, if the first airway 10a1 is disposed in the interior of the aerosol generating substrate 10 having the spiral shape, the release and extraction of the aerosol can be further enhanced, which can improve the utilization rate of the aerosol generating substrate 10.

[0143] Furthermore, for the aerosol generating substrate 10 in which the multiple first airways 10a1 extends from one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1, these first airways 10a1 may be arranged in multiple manners, and the following embodiments will be described by way of example. It should be noted that the first airway(s) 10a1 described in the following embodiments may be the first airway 10a1 extending from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. This does not mean that all of the first airways 10a1 in the interior of the aerosol generating substrate 10 can only extend from the one end to the opposite end of the aerosol generating substrate 10 in the first direction Z1. In some embodiments, the interior of the aerosol generating substrate 10 may also be provided with the first airways 10a1 extending from the one end to the opposite end of the aerosol generating substrate 10 in other directions.

[0144] In one embodiment, referring to FIGS. 4 and 11, the multiple first airways 10a1 may be arranged to form multiple trajectory lines. Herein, each of the first airways 10a1 in a single trajectory line may be linearly arranged in a second direction Z2, and the multiple trajectory lines may be arranged in a third direction Z3. The second direction Z2 and the third direction Z3 may intersect, and the plane in which the second direction Z2 and the third direction Z3 are located may be perpendicular to the first direction Z1.

[0145] Exemplarily, referring to FIG. 4, each of the first airways 10a1 in the single trajectory line may be linearly arranged in the second direction Z2, and the multiple trajectory lines may be arranged in the third direction Z3 perpendicular to the second direction Z2. In other words, the multiple first airways 10a1 may be arranged in a matrix pattern shown in FIG. 13. In some other embodiments, the first airways 10a1 may also be arranged in a grid pattern shown in FIG. 16.

[0146] Exemplarily, referring to FIG. 11, each of the first airways 10a1 in the single trajectory line may be arranged in a circumferential direction around the center of the aerosol generating substrate 10, and multiple trajectory lines may be arranged in a radial direction of the aerosol generating substrate 10.

[0147] The circumferential direction around the center of the aerosol generating substrate 10 may be regarded to be corresponding to the second direction Z2, and the radial direction of the aerosol generating substrate 10 may be regarded to be corresponding to the third direction Z3. In other words, the multiple first airways 10a1 may be arranged in an annular pattern.

[0148] Referring to FIG. 4, each of the first airways 10a1 in the multiple trajectory lines may be uniformly distributed. That is, all of the first airways 10a1 are identical, the first airways 10a1 in the single trajectory line are arranged at equal intervals, and the multiple trajectory lines are also arranged at equal intervals.

[0149] The uniform distribution of each of the first airways 10a1 can enable the mass per unit volume of the region in which the aerosol generating substrate 10 is provided with the first airways 10a1 to be relatively uniform. As such, during the heating and inhalation process, the uniformity of the aerosol released by the aerosol generating substrate 10 can be better improved, thereby improving the inhalation consistency.

[0150] In some other embodiments, each of the first airways 10a1 in the multiple trajectory lines may be non-uniformly distributed. The non-uniformly distributed first airways 10a1, in combination with different heating manners, can achieve uniform heating of the aerosol generating substrate 10, and also achieve the consistency of the aerosol in the initial and subsequent puffs.

[0151] For example, taking the multiple first airways 10a1 arranged in the annular pattern as an example, exemplarily referring to FIG. 25, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The repeated arrangement means that each of the first airways 10a1 in the same row of airways 10a is exactly the same. The cross-sectional area of the first airway 10a1 in each trajectory line may gradually increase from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the cross-sectional areas of the first airways 10a1 in different trajectory lines may be different; and the cross-sectional area of the first airway 10a1 becomes larger as it is farther away from the center of the aerosol generating substrate 10.

[0152] Exemplarily, referring to FIG. 26, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The spacing between the first airways 10a1 in two adjacent trajectory lines may gradually decrease from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the multiple trajectory lines are not arranged at the equal intervals; and the spacing between the first airways 10a1 in two adjacent trajectory lines becomes smaller as it is farther away from the center of the aerosol generating substrate 10.

[0153] For both the aerosol generating substrate 10 where the cross-sectional area of the first airway 10a1 increases with the distance from the center of the aerosol generating substrate 10 to be larger, as well as the aerosol generating substrate 10 where the spacing between the first 10a1 in two adjacent trajectory lines decreases with the distance from the center of the aerosol generating substrate 10 to be larger, the closer to the central region of the aerosol generating substrate 10, the larger the mass per unit volume of the aerosol generating substrate 10. When such two types of aerosol generating substrates 10 are adapted to the central heating manner, the time required for heat conduction from the inside to the outside is longer, thereby prolonging the time for heating the position of the outer side wall of the aerosol generating substrate 10, which can improve the uniformity of the aerosol released by the aerosol generating substrate 10, increase the inhalation duration / the number of puffs, and at the same time, maintain the consistency of the aerosol release, and bring a comfortable inhalation experience to the user.

[0154] Continuing to take the multiple first airways 10a1 arranged in the annular pattern as an example, exemplarily referring to FIG. 27, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The cross-sectional areas of the first airways 10a1 in each trajectory line may gradually decrease from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the cross-sectional areas of the first airways 10a1 in different trajectory lines may be different; and the cross-sectional area of the first airway 10a1 becomes smaller as it is farther away from the center of the aerosol generating substrate 10.

[0155] Exemplarily, referring to FIG. 28, each of the first airways 10a1 in the single trajectory line may be repeatedly arranged. The spacing between the first airways 10a1 in two adjacent trajectory lines may gradually increase from the center of the aerosol generating substrate 10 toward the outer side of the aerosol generating substrate 10 in the radial direction. In other words, the multiple trajectory lines are not arranged at the equal intervals; and the spacing between the first airways 10a1 in two adjacent trajectory lines becomes larger as it is farther away from the center of the aerosol generating substrate 10.

[0156] For both the aerosol generating substrate 10 where the cross-sectional area of the first airway 10a1 decreases with the distance from the center of the aerosol generating substrate 10 to be larger, as well as the aerosol generating substrate 10 where the spacing between the first airways 10a1 in two adjacent trajectory lines increases with the distance from the center of the aerosol generating substrate 10 to be larger, the closer to the outer side wall of the aerosol generating substrate 10, the larger the mass per unit volume of the aerosol generating substrate 10. When such two types of aerosol generating substrates 10 are adapted to the circumferential heating manner, the time required for heat conduction from the outside to the inside is longer, thereby prolonging the time for heating the position of the center of the aerosol generating substrate 10, which can improve the uniformity of the aerosol released by the aerosol generating substrate 10, increase the inhalation duration / the number of puffs, and at the same time, maintain the consistency of the aerosol release, and bring a comfortable inhalation experience to the user.

[0157] It should be noted that the non-uniform distribution of the first airways 10a1 in the multiple trajectory lines is not limited to the four patterns described above, and various adjustments may be made as needed. For example, the spacing between the first airways 10a1 in the single trajectory line may be changed, and the cross-sectional shapes of the first airways 10a1 in different rows may also be changed. The aforementioned implementations involving the changes in the cross-sectional area may be combined with the implementations involving the changes in the spacing, and the like.

[0158] Furthermore, for the multiple trajectory lines arranged in a non-annular pattern, such as the arrangement shown in FIGS. 4 and 8, the multiple trajectory lines may be arranged in the non-uniform distribution manner described in the aforementioned embodiments.

[0159] In some embodiments, the multiple first airways 10a1 in the interior of the aerosol generating substrate 10 may also be randomly distributed. Herein, among the multiple first airways 10a1 that are randomly distributed, the cross-sectional shape of each of the first airways 10a1 may be exactly the same, or the cross-sectional shapes of at least two of the first airways 10a1 may be different. Similarly, the cross-sectional area of each of the first airways 10a1 may be exactly the same, or the cross-sectional areas of at least two of the first airways 10a1 may be different.

[0160] Additionally, for the aerosol generating substrate 10 in which the multiple first airways 10a1 are provided, whether the first airways 10a1 are arranged in multiple trajectory lines or randomly distributed, in one embodiment, referring to FIGS. 16 to 20, each of the first airways 10a1 may be distributed in a respective region of the interior of the aerosol generating substrate 10. In other words, the first airways 10a1 may be provided in substantially every region of the interior of the aerosol generating substrate 10, with no significant region(s) lacking the first airway(s) 10a1.

[0161] In another embodiment, referring to FIG. 8, the interior of the aerosol generating substrate 10 may have a first region 10b and a second region 10c, and each of the first airways 10a1 may be distributed in the first region 10b. That is, the first airway(s) 10a1 may be disposed only in the first region 10b, and the first airway 10a1 may not be disposed in the second region 10c. Here, the number and positions of the first region(s) 10b and the second region(s) 10c may be determined as needed, which are not limited herein.

[0162] In one embodiment, referring to FIG. 12, the interior of the aerosol generating substrate 10 may have a third region 10d and a fourth region 10e surrounding the outer peripheral side of the third region 10d. A portion of the first airways 10a1 may be distributed in the third region 10d, and another portion of the first airways 10a1 may be distributed in the fourth region 10e. Herein, each of the first airways 10a1 located in the third region 10d may have the same cross-sectional shape and the same cross-sectional area, and a cross-sectional shape of at least one of the first airways 10a1 located in the fourth region 10e may be a portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d. In other words, the interior of the aerosol generating substrate 10 has at least two types of first airways 10a1 with the different cross-sectional shapes; and the distinct cross-sectional shape of the first airway 10a1 in the fourth region 10e is a portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d.

[0163] Due to the certain limitation on the dimensions of the aerosol generating substrate 10, the cross-sectional shape of at least one first airway 10a1 located in the fourth region 10e is the portion of the cross-sectional shape of the first airway 10a1 located in the third region 10d; as such, the cross-sectional area and the cross-sectional shape of each first airway 10a1 can be flexibly designed. Therefore, it can not only facilitate the adjustment of the resistance to draw when inhaling by the user, but also facilitate the adjustment of the mass distribution at different positions of the aerosol generating substrate 10, which can enable the heating rate and the heating uniformity to be better enhanced, and the inhalation experience feeling to be better improved.

[0164] In the description of the present disclosure, references to the terms such as “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in yet other embodiments”, or “exemplary” or the like mean that the specific feature, structure, material or characteristic described in connection with the embodiment or example may be included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine different embodiments or examples as well as the features in different embodiments or examples described in the present disclosure unless they are not contradictory to each other.

[0165] The foregoing is merely the preferred embodiments of the present disclosure, and is not intended to limit the present disclosure. Various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Examples

Embodiment Construction

[0075]Embodiments of the present disclosure provide an aerosol generating article. Referring to FIGS. 1 to 28, the aerosol generating article includes an aerosol generating substrate 10.

[0076]The aerosol generating article may be configured to be used in conjunction with an aerosol generating device that includes a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate 10 to generate the aerosol, for inhalation by the user or for use in medicine, cosmetics, etc.

[0077]The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner and a peripheral heating manner. The center heating manner refers to a manner of inserting the heating component to the interior of the aerosol generating article, to bake and heat the aerosol generating article from the inside to the outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol ge...

Claims

1. An aerosol generating substrate, wherein the aerosol generating substrate is an integral structure having one or more airways; among all of the airways, at least one airway extends from one end to an opposite end of the aerosol generating substrate in a first direction, and at least one end of two opposite ends of each of the airways in an extending direction is an open end;wherein a bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or,a true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or,a porosity of the aerosol generating substrate is 5% to 95%.

2. The aerosol generating substrate of claim 1, wherein the bulk density is 0.40 g / cm3 to 1.10 g / cm3; and / or,the true density is 1.1 g / cm3 to 1.4 g / cm3; and / or,the porosity is 40% to 75%.

3. The aerosol generating substrate of claim 1, wherein the two opposite ends of each of the airways in the extending direction are open ends.

4. The aerosol generating substrate of claim 1, wherein the airways comprise at least one of a first airway and a second airway, the first airway is located in an interior of the aerosol generating substrate, and the second airway is located in an exterior of the aerosol generating substrate.

5. The aerosol generating substrate of claim 4, wherein a cross-sectional shape of the first airway is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

6. The aerosol generating substrate of claim 4, wherein a plurality of first airways are disposed in the interior of the aerosol generating substrate;among all of the first airways, at least one first airway has a cross-sectional area different from cross-sectional areas of other first airways; and / or,among all of the first airways, at least one of first airway has a cross-sectional shape different from cross-sectional shapes of other first airways.

7. The aerosol generating substrate of claim 4, wherein the aerosol generating substrate comprises a main body part and a plurality of protruding parts, the protruding parts are disposed at intervals on a peripheral side of the main body part, and the second airway is formed at an interval between two adjacent protruding parts; or,a portion of an outer surface of the aerosol generating substrate is recessed to form the second airway;wherein a cross-sectional shape of the second airway is one of the following: a semicircular shape, a semielliptical shape, a polygonal shape, and an irregular shape.

8. The aerosol generating substrate of claim 4, wherein the aerosol generating substrate has a spiral shape with a plurality of turns, and two adjacent turns of the aerosol generating substrate are disposed at an interval to form the second airway in the interval.

9. The aerosol generating substrate of claim 4, wherein the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction; andwherein the plurality of first airways are arranged to form a plurality of trajectory lines, each of the first airways in a single trajectory line is linearly arranged in a second direction, the plurality of trajectory lines are arranged in a third direction, the second direction and the third direction intersect, and a plane in which the second direction and the third direction are located is perpendicular to the first direction.

10. The aerosol generating substrate of claim 9, wherein each of the first airways in the plurality of trajectory lines is uniformly distributed.

11. The aerosol generating substrate of claim 9, whereineach of the first airways in the single trajectory line is linearly arranged in the second direction, and the plurality of trajectory lines are arranged in the third direction that is perpendicular to the second direction; or,each of the first airways in the single trajectory line is arranged in a circumferential direction around a center of the aerosol generating substrate, and the plurality of trajectory lines are arranged in a radial direction of the aerosol generating substrate.

12. The aerosol generating substrate of claim 9, whereineach of the first airways in the single trajectory line is repeatedly arranged; and a cross-sectional area of the first airway in each trajectory line gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction; or,each of the first airways in the single trajectory line is repeatedly arranged; and a spacing between the first airways in two adjacent trajectory lines gradually increases or gradually decreases from a center of the aerosol generating substrate toward an outer side of the aerosol generating substrate in a radial direction.

13. The aerosol generating substrate of claim 4, wherein the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction, and each of the first airways is randomly distributed.

14. The aerosol generating substrate of claim 4, wherein the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction;each of the first airways is distributed in a respective region of the interior of the aerosol generating substrate; or,the interior of the aerosol generating substrate has a first region and a second region, and each of the first airways is distributed in the first region.

15. The aerosol generating substrate of claim 4, wherein the interior of the aerosol generating substrate has a plurality of first airways that extend from the one end to the opposite end of the aerosol generating substrate in the first direction;the interior of the aerosol generating substrate has a third region and a fourth region surrounding an outer peripheral side of the third region, a portion of the first airways are distributed in the third region, and another portion of the first airways are distributed in the fourth region, wherein each of the first airways located in the third region has the same cross-sectional shape and the same cross-sectional area, and a cross-sectional shape of at least one of the first airways located in the fourth region is a portion of the cross-sectional shape of the first airways located in the third region.

16. The aerosol generating substrate of claim 1, wherein the airway is a straight-through airway extending along a straight line; or,the airway is a spiral airway, and at least partial region of the spiral airway in the extending direction has a curvilinear shape with a non-zero curvature.

17. The aerosol generating substrate of claim 1, wherein a cross-sectional shape of the aerosol generating substrate perpendicular to the first direction is one of the following: a circular shape, an elliptical shape, a waist-circular shape, a polygonal shape, and an irregular shape.

18. The aerosol generating substrate of claim 1, wherein the aerosol generating substrate has a columnar shape, and the first direction is an elongation direction of the aerosol generating substrate.

19. An aerosol generating article, comprising:an aerosol generating substrate;a functional segment, disposed at one end of the aerosol generating substrate in a first direction, and the functional segment at least comprising a cooling segment; andan outer wrapping layer, wrapped around outer peripheral sides of the functional segment and the aerosol generating substrate;wherein the aerosol generating substrate is an integral structure having one or more airways; among all of the airways, at least one airway extends from one end to an opposite end of the aerosol generating substrate in the first direction, and at least one end of two opposite ends of each of the airways in an extending direction is an open end;wherein a bulk density of the aerosol generating substrate is 0.25 g / cm3 to 1.40 g / cm3; and / or,a true density of the aerosol generating substrate is 1.0 g / cm3 to 1.6 g / cm3; and / or,a porosity of the aerosol generating substrate is 5% to 95%.

20. The aerosol generating article of claim 19, wherein the functional segment further comprises a filtering segment, and the cooling segment is located between the filtering segment and the aerosol generating substrate.

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