WO2024152762A1 - Aerosol-generating substrate and aerosol-generating article - Google Patents

Abstract

Provided in the embodiments of the present application are an aerosol-generating substrate and an aerosol-generating article, wherein the aerosol-generating substrate is provided with an air channel. The air channel comprises at least one spiral air channel. The spiral air channel penetrates at least one end of the aerosol-generating substrate in a length direction, and at least part of the area of the spiral air channel in an extending direction is in a curved shape with the curvature not being 0. The aerosol-generating substrate of the embodiments of the present application can improve the use experience feeling of users.

Description

An aerosol generating substrate and an aerosol generating product

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number 202310098143.X and application date January 20, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference.

Technical Field

The present application relates to the technical field of smoking products, and in particular to an aerosol-generating substrate and an aerosol-generating product generated by heating.

Background technique

Smoking articles include smoking articles that form aerosols by ignition and smoking articles that form aerosols by heating without burning. In a typical smoking article that heats without burning, it contains an aerosol-generating matrix such as tobacco raw materials, flavor raw materials and/or atomizers that can volatilize when heated to generate an aerosol. The aerosol-generating matrix is heated by an external heat source so that the aerosol-generating matrix is just heated to a degree sufficient to be emitted. The aerosol-generating matrix will not burn. By loading a large dose of atomizer, the aerosol is released by high-temperature heating when in use to form smoke.

As one of the important components of new tobacco products, the aerosol generating matrix of the smoking products that heat without burning mainly includes three types: particle type, traditional tobacco type and thin sheet type. However, there are many problems with the smoking segment materials in the related technology during user use, such as: 1. The thin sheet aerosol generating matrix is prone to sticking to the heating device of the device during use, and uneven aerosol release is prone to occur during the user's inhalation process; 2. The traditional tobacco-type aerosol generating matrix is prone to matrix shedding during use, and is also prone to "blocking" when used in conjunction with a central heating device. In addition, the traditional tobacco-type aerosol generating matrix also has a large energy loss during use; 3. At this stage, the particle-type aerosol generating matrix is prone to large differences in the uniformity of the filling particle morphology during production and processing. During use, there are also problems such as the seal is easy to fall off, easy to absorb moisture, and easy to stick to the utensils and agglomerate.

Since the aerosol generating matrix in the related art has many problems in the production and user use process, it is difficult to make improvements under the existing form to enhance the user experience, and the resulting product production cost is also high.

Summary of the invention

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

To achieve the above-mentioned purpose, an embodiment of the present application provides an aerosol generating substrate, wherein the aerosol generating substrate has an airway, wherein the airway includes at least one spiral airway, wherein the spiral airway runs through at least one end of the aerosol generating substrate along the length direction, and at least a portion of the spiral airway along the extension direction is a curve with a curvature that is not zero.

In one embodiment, the spiral air channel runs through opposite ends of the aerosol generating substrate along the length direction.

In one embodiment, when the number of turns of the spiral airway around the central axis of the aerosol generating substrate along the length direction is less than one turn, in the extension direction of the spiral airway, the line connecting the starting point of the spiral airway and any point on the spiral airway except the starting point is inclined relative to the central axis of the aerosol generating substrate.

In one embodiment, at least one of the interior of the aerosol-generating substrate and the outer sidewall of the aerosol-generating substrate is provided with the spiral air channel.

In one embodiment, the spiral airway has a cross-section perpendicular to the length direction of the aerosol generating substrate; the cross-section of the spiral airway disposed inside the aerosol generating substrate is in the shape of a circle, an ellipse, a racetrack, a polygon and an irregular shape.

In one embodiment, the spiral airway has a cross-section perpendicular to the length direction of the aerosol generating substrate; the cross-section of the spiral airway arranged on the outer side wall of the aerosol generating substrate is in the shape of one of semicircular, semi-elliptical, polygonal and irregular.

In one embodiment, the air channel further comprises at least one straight air channel, and the straight air channel runs through at least one end of the aerosol generating substrate along the length direction in a straight line.

In one embodiment, the spiral air channel and one straight air channel are provided inside the aerosol generating substrate, and the center line of the straight air channel along the extension direction coincides with the center axis of the aerosol generating substrate along the length direction.

In one embodiment, the spiral air channel is arranged inside the aerosol generating substrate, and the straight air channel is arranged at least on the outer side wall of the aerosol generating substrate.

In one embodiment, the straight air channel is arranged inside the aerosol generating substrate, and the spiral air channel is arranged at least on the outer side wall of the aerosol generating substrate.

In one embodiment, the number of the spiral airways is 1 to 730.

In one embodiment, the aerosol generating matrix has a plurality of airways inside, and the plurality of airways are divided into a plurality of trajectory lines, wherein the airways in a single trajectory line are linearly arranged along the first direction, and the plurality of trajectory lines are arranged along the second direction, and the first direction and the second direction are not parallel.

In one embodiment, the airways in the plurality of trajectory lines are evenly distributed.

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

In one embodiment, the airways in a single trajectory are arranged along a circumferential direction around the center of the aerosol generating substrate, and multiple trajectory lines are arranged along the radial direction of the aerosol generating substrate.

In one embodiment, the airways in a single trajectory are repeatedly arranged, and the aperture of the airways in each trajectory gradually increases or decreases from the center of the aerosol generating substrate to the radially outer side of the aerosol generating substrate.

In one embodiment, the airways in a single trajectory are repeatedly arranged, and the distance between the airways in two adjacent trajectory lines gradually increases or decreases from the center of the aerosol generating substrate to the radially outer side of the aerosol generating substrate.

In one embodiment, a plurality of the airways are disposed inside the aerosol generating substrate, and the airways are randomly distributed.

In one embodiment, a plurality of airways are provided inside the aerosol generating substrate; The airways are distributed in various regions within the aerosol generating substrate.

In one embodiment, a plurality of the air channels are disposed inside the aerosol generating substrate; the interior of the aerosol generating substrate has a first region and a second region, and the air channels are distributed in the first region.

The present application also provides an aerosol generating product, including:

The aerosol-generating substrate described above;

A functional segment disposed at one end of the aerosol generating substrate along the length direction, the functional segment at least comprising a filtering segment for filtering aerosol;

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

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

The embodiment of the present application provides an aerosol generating substrate and an aerosol generating product, wherein the aerosol generating substrate has an airway, the airway includes at least one spiral airway, the spiral airway runs through at least one end of the aerosol generating substrate along the length direction, and at least part of the area of the spiral airway along the extension direction is in a curve shape with a curvature not equal to 0. The spiral airway is provided to increase the surface area of the aerosol generating substrate (the side wall of the spiral airway is equivalent to a part of the surface of the aerosol generating substrate), so that the heat of the aerosol generating substrate can enter the inside of the aerosol generating substrate from the surface of the aerosol generating substrate, and the heating efficiency can be improved compared to the aerosol generating substrate that does not provide any airway in the related art and directly conducts heat inside. In addition, when the aerosol suction capacity is constant, the spiral airway can extend the airflow path and increase the flow speed of the airflow in the aerosol generating substrate, thereby increasing the impact force of the airflow, so that the aerosol can be evenly mixed, and then the extraction efficiency and uniformity of the aerosol in the aerosol generating substrate can be improved, and the user's suction experience can be improved. That is to say, compared with the aerosol generating matrix in the related art, the aerosol generating matrix in the embodiment of the present application can improve the user's usage experience.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a first aerosol generating product according to an embodiment of the present application;

FIG2 is a schematic diagram of the structure of the aerosol generating article shown in FIG1 with the outer wrapping layer omitted;

FIG3 is a schematic structural diagram of the first aerosol generating substrate shown in FIG2 ;

FIG4 is a perspective view of the aerosol generating substrate shown in FIG3;

FIG5 is a schematic structural diagram of a second aerosol generating substrate according to an embodiment of the present application;

FIG6 is a perspective view of the aerosol generating substrate shown in FIG5;

FIG. 7 is a schematic structural diagram of a third aerosol generating substrate according to an embodiment of the present application;

FIG8 is a perspective view of the aerosol generating substrate shown in FIG7;

FIG9 is a cross-sectional view of the aerosol generating substrate shown in FIG7 ;

FIG10 is a schematic structural diagram of a fourth aerosol generating substrate according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a fifth aerosol generating substrate according to an embodiment of the present application;

FIG12 is a schematic structural diagram of a sixth aerosol generating substrate according to an embodiment of the present application;

FIG13 is a schematic structural diagram of a seventh aerosol generating substrate according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of an eighth aerosol generating substrate according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a ninth aerosol generating substrate according to an embodiment of the present application;

FIG16 is a schematic structural diagram of a tenth aerosol generating substrate according to an embodiment of the present application;

FIG. 17 is a schematic structural diagram of an eleventh aerosol generating substrate according to an embodiment of the present application;

FIG. 18 is a schematic structural diagram of a twelfth aerosol generating substrate according to an embodiment of the present application;

FIG19 is a schematic diagram of the structure of a second aerosol generating article according to an embodiment of the present application;

FIG20 is a schematic structural diagram of the thirteenth aerosol generating substrate shown in FIG19;

FIG21 is a cross-sectional view of the aerosol generating substrate shown in FIG20;

FIG22 is a schematic structural diagram of a fourteenth aerosol generating substrate according to an embodiment of the present application;

FIG23 is a schematic structural diagram of a fifteenth aerosol generating substrate according to an embodiment of the present application;

FIG24 is a cross-sectional view of the aerosol generating substrate shown in FIG23;

FIG25 is a schematic structural diagram of a sixteenth aerosol generating substrate according to an embodiment of the present application;

FIG26 is a schematic structural diagram of a seventeenth aerosol generating substrate according to an embodiment of the present application;

FIG27 is a schematic structural diagram of an eighteenth aerosol generating substrate according to an embodiment of the present application;

FIG28 is a schematic structural diagram of a nineteenth aerosol generating substrate according to an embodiment of the present application;

FIG29 is a cross-sectional view of a third aerosol-generating article according to an embodiment of the present application, in which the outer wrapping layer is omitted;

FIG30 is a cross-sectional view of a fourth aerosol generating article according to an embodiment of the present application, in which the outer wrapping layer is omitted.

Detailed ways

An embodiment of the present application provides an aerosol generating product, please refer to Figures 1 and 2, the aerosol generating product includes a functional segment 20, an outer wrapping layer 30 and an aerosol generating substrate 10. The functional segment 20 is arranged at one end of the aerosol generating substrate 10 along the length direction, and the functional segment 20 at least includes a filter segment 21 for filtering aerosol. The outer wrapping layer 30 is wrapped around the outer peripheral side of the functional segment 20 and the aerosol generating substrate 10.

The aerosol generating product is used in conjunction with an electronic atomization device having a heating component. Specifically, the heating component heats and atomizes the aerosol generating matrix 10 to generate an aerosol, and the user inhales the filtered aerosol through the filtering section 21 of the functional section 20.

There are many heating methods for the heating component. Exemplarily, the heating methods include central heating and circumferential heating. The central heating method refers to the heating component being inserted into the interior of the aerosol generating product to bake and heat the aerosol generating product from the inside out. The circumferential heating method refers to the heating component being arranged at the periphery of the aerosol generating product to bake and heat the aerosol generating product from the outside in. These heating methods may specifically be resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc., which are not specifically limited here.

The functional segment 20 may be provided with only the filtering segment 21 as shown in FIG. 29 , or may be provided with the filtering segment 21 and the cooling segment 22 as shown in FIG. 30 . For the functional segment 20 provided with the cooling segment 22 , the cooling segment 22 is provided between the filtering segment 21 and the aerosol generating matrix 10 , so as to cool the aerosol before the filtering segment 21 filters the aerosol, so as to reduce the temperature of the aerosol and improve the "hot mouth" phenomenon when the user inhales the aerosol.

The material of the cooling section 22 includes but is not limited to one or more combinations of PE (polyethylene), PLA (Polylactic acid, also known as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), acetate fiber, and acrylic fiber materials.

The material of the filter section 21 includes, but is not limited to, one or more combinations of PE, PLA, PBAT, PP, acetate fiber, and acrylic fiber materials.

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

It should be noted that the aerosol generating product relies on the aerosol generating substrate 10 to generate aerosol, and the functional section 20 does not generate aerosol.

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

It should be noted that the aerosol generating product of the embodiment of the present application can be used for inhalation by heating and burning, or can be used for inhalation by heating without burning. In the embodiment of the present application, the aerosol generating product is used for inhalation by heating without burning as an example.

Another embodiment of the present application further provides an aerosol generating substrate 10, which is used in the aerosol generating product described in the embodiment of the present application. Please refer to Figures 3 and 4. The aerosol generating substrate 10 has an air channel 10a, and the air channel 10a includes at least one spiral air channel 10a', that is, the number of air channels 10a can be one or more, but no matter how many air channels 10a there are, at least one of the air channels 10a is a spiral air channel 10a'. The spiral air channel 10a' runs through at least one end of the aerosol generating substrate 10 along the length direction, and at least part of the area of the spiral air channel 10a' along the extension direction is a curve with a curvature that is not zero.

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

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

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

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

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

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

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

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

Exemplarily, the aerosol generating matrix 10 can be a particle combination, which is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing components such as smoke-generating agent and tobacco. The aerosol generating matrix 10 is an integrated structure, for example, an integrated structure that can be formed by injection molding, compression molding or extrusion technology. Wherein extrusion molding refers to a processing method in which a raw material mixture is added to an extruder, and the material is pushed forward by the screw through the action between the extruder barrel and the screw, and continuously passes through a die head to form various cross-section products or semi-finished products. The aerosol matrix formed by extrusion molding is in a strip shape.

Since the aerosol generating matrix 10 is a particle combination, it is an integrated medium when the aerosol generating matrix 10 is heated and sucked or stops being heated, and is not prone to disintegration and falling off. This solves the problems of the thin sheet, filamentous or loose particle aerosol generating matrix in the prior art, such as loose sheets, falling of filamentous components and particle components, and difficulty in cleaning.

In addition, the shape of the aerosol generating substrate 10 is not limited, as long as the air channel 10a can be provided. For example, referring to FIG3 , the aerosol generating substrate 10 can be columnar.

The spiral air passage 10a' is a passage for air flow to pass through, and the number of the spiral air passage 10a' may be one or more.

There are many ways for the spiral air channel 10a′ to penetrate at least one end of the aerosol generating substrate 10 along the length direction. For example, in some embodiments, please refer to Figure 26, the spiral air channel 10a′ can penetrate one end of the aerosol generating substrate 10 along the length direction, and the other end is a closed end.

In other embodiments, please refer to FIG. 4 , the spiral air passage 10a′ may penetrate opposite ends of the aerosol generating substrate 10 along the length direction, that is, the airflow may flow from one end of the aerosol generating substrate 10 along the length direction to the other end of the aerosol generating substrate 10 along the length direction through the spiral air passage 10a′. Compared with the spiral air passage 10a′ penetrating one end of the aerosol generating substrate 10 along the length direction, the spiral air passage 10a′ penetrating opposite ends of the aerosol generating substrate 10 along the length direction is more conducive to reducing the inhalation resistance of the user.

In some other embodiments, when a plurality of spiral air passages 10a' are provided, please refer to FIG. 27 , a portion of the spiral air passages 10a' may penetrate one end of the aerosol generating substrate 10 along the length direction, and another portion of the spiral air passages 10a' may penetrate the other end of the aerosol generating substrate 10 along the length direction. Please refer to FIG. 28 , or all of the spiral air passages 10a' may penetrate the same end of the aerosol generating substrate 10 along the length direction, and the other end may be a closed end. Please refer to FIG. 8 , or each spiral air passage 10a' may penetrate opposite ends of the aerosol generating substrate 10 along the length direction.

It should be noted that in the embodiments of the present application, the length direction does not specifically refer to the direction in which the outer contour of the aerosol generating substrate 10 is the longest. Specifically, the length direction is the vertical distance direction between the two ends of the aerosol generating substrate 10. For example, when the aerosol generating substrate 10 is a cylinder, the length direction is the vertical distance direction between the two end surfaces, that is, the length direction is the axial direction of the aerosol generating substrate 10. It should be noted that even when the axial length of the aerosol generating substrate 10 is less than its diameter, the length direction of the aerosol generating substrate 10 is still the axial direction.

For example, when the aerosol generating matrix 10 is in the shape of a column with a cross-section of a triangle, polygon, oblong, ellipse, etc., the length direction is the axial direction. When the aerosol generating matrix 10 is in the shape of a rectangle, the length direction of the aerosol generating matrix 10 can be any direction of the length, width, or height of the rectangle.

The arrangement direction of the functional segment 20 and the aerosol generating substrate 10 is consistent with the length direction; the direction in which the aerosol generating product is inserted into the electronic atomization device and the direction in which the aerosol generating product is taken out of the electronic atomization device are both parallel to the length direction. The length of the aerosol generating substrate 10 along the length direction may be longer, shorter, or the same as the length in other directions.

At least part of the area of the spiral airway 10a' along the extension direction is a curve shape with a non-zero curvature, which means that at least part of the area of the spiral airway 10a' along the extension direction is not a straight line shape with a zero curvature. For example, along the extension direction of the spiral airway 10a', the spiral airway 10a' may have a structure with both a curve segment with a non-zero curvature and a straight line segment with a zero curvature, or may have a curve segment with a non-zero curvature but no straight line segment with a zero curvature. In other words, from the starting point to the end point of the spiral airway 10a' along the extension direction, the spiral airway 10a' does not need to extend in a straight line.

The spiral air channel 10a′ can increase the surface area of the aerosol generating substrate 10 (the side wall of the spiral air channel 10a′ is equivalent to a part of the surface of the aerosol generating substrate 10), so that the heat of the aerosol generating substrate 10 The amount of heat can enter the interior of the aerosol generating matrix 10 from the surface of the aerosol generating matrix 10, which can improve the heating efficiency compared to the aerosol generating matrix in the related art that does not have any airway and directly conducts heat inside. In addition, when the aerosol suction capacity is constant, the spiral airway 10a′ can extend the airflow path and increase the flow speed of the airflow in the aerosol generating matrix 10, thereby increasing the impact force of the airflow, so that the aerosol can be evenly mixed, and then the extraction efficiency and uniformity of the aerosol in the aerosol generating matrix 10 can be improved, and the user's suction experience can be improved. In other words, compared with the aerosol generating matrix in the related art, the aerosol generating matrix 10 of the embodiment of the present application can improve the user's experience.

In addition, compared with the aerosol generating substrate in the related art, the aerosol generating substrate 10 in the embodiment of the present application has higher consistency, lower production cost, and is easy to process and manufacture.

In one embodiment, referring to FIG. 3 to FIG. 25 , the number of the spiral air passages 10 a ′ may be 1 to 730.

Exemplarily, one spiral air channel 10a′ is provided on the aerosol generating substrate 10 shown in FIG3 , two spiral air channels 10a′ are provided on the aerosol generating substrate 10 shown in FIGS. 5 and 6 , and the number of spiral air channels 10a′ provided on the aerosol generating substrate 10 shown in FIGS. 7 to 25 is greater than two.

Research has found that when the number of spiral airways 10a′ is greater than 730, the quality of the aerosol generating matrix 10 is low, the aerosol release time is short, the aerosol generating matrix 10 is prone to burning, and the aerosol generating matrix 10 is prone to uneven aerosol release during the heating process (for example, the first two puffs release a large amount, and the next few puffs release a small amount of aerosol), which affects the user's smoking experience.

When the number of spiral air channels 10a′ is set within the range of 1 to 730, the flow resistance of the aerosol generating matrix 10 is relatively small (that is, the suction resistance is relatively small), the aerosol inside the aerosol generating matrix 10 is easy to extract, the aerosol release is more uniform and the utilization rate is higher, the aerosol generating matrix 10 is not prone to burning, and the user experience is relatively high.

Optionally, the number of the spiral air channels 10a' may be 4 to 90. The number of the spiral air channels 10a' within this range is moderate, and the aerosol release is more uniform and stable.

Preferably, the number of the spiral air channels 10a' may be 9 to 75.

More preferably, the number of the spiral air channels 10a' may be 9 to 65.

In one embodiment, please refer to Figure 4, when the number of turns of the spiral air channel 10a′ around the central axis C of the aerosol generating substrate 10 along the length direction is less than one turn, in the extension direction of the spiral air channel 10a′, the line L connecting the starting point Q of the spiral air channel 10a′ and any point P on the spiral air channel 10a′ except the starting point Q is inclined relative to the central axis C of the aerosol generating substrate 10 along the length direction.

In other embodiments, the number of circles that the spiral air duct 10a′ surrounds the central axis C of the aerosol generating substrate 10 along the length direction may be greater than one, such as 2 circles or more (not shown). In this case, it is equivalent to having more than two sections of spiral air ducts stacked, and in the extension direction of each section of the spiral air duct, the line connecting the starting point of the spiral air duct and any point on the spiral air duct except the starting point is inclined relative to the central axis C of the aerosol generating substrate 10 along the length direction.

The central axis C of the aerosol generating substrate 10 along the length direction is a virtual reference line, and the central axis C passes through the center of the aerosol generating substrate.

Specifically, the spiral air channel 10a′ can be simplified into a curve extending from one end of the aerosol generating substrate 10 along the length direction to the other opposite end. The starting point Q of the spiral air channel 10a′ and any point P of the spiral air channel 10a′ except the starting point Q are points on the curve.

The line L connecting the starting point Q of the spiral air channel 10a′ and any point P on the spiral air channel 10a′ except the starting point Q is arranged to be inclined relative to the central axis C, which means that the line L is neither parallel to the central axis C nor perpendicular to the central axis C. This arrangement can extend the length of the spiral air channel 10a′ as much as possible, further increase the surface area of the aerosol generating matrix 10 and extend the airflow path, thereby having better effects in improving the heating efficiency and enhancing the user's smoking experience.

In one embodiment, referring to FIGS. 3 to 25 , at least one of the interior of the aerosol generating substrate 10 and the outer sidewall of the aerosol generating substrate 10 is provided with a spiral air channel 10 a ′.

Please refer to Figure 3. As shown in Figure 3, the spiral air channel 10a′ can be set only inside the aerosol generating substrate 10, that is, the inlet and outlet of the spiral air channel 10a′ can be seen from the opposite ends of the aerosol generating substrate 10 along the length direction, but the spiral air channel 10a′ cannot be seen from the side of the aerosol generating substrate 10, which is equivalent to setting a hole-shaped spiral air channel 10a′ inside the aerosol generating substrate 10.

Please refer to FIG. 25 . As shown in FIG. 25 , the spiral air channel 10a′ may be provided only on the outer wall of the aerosol generating substrate 10 . That is, a part of the outer wall of the aerosol generating substrate 10 is recessed to form a spiral air channel 10a′. The air channel 10a′ is equivalent to the groove-shaped spiral air channel 10a′ that can be seen on the outer wall of the aerosol generating matrix 10. The groove-shaped spiral air channel 10a′ cooperates with the outer wrapping layer 30 to form an air flow channel located outside the aerosol generating matrix 10 (refer to Figure 19).

Please refer to FIG. 20 . As shown in FIG. 20 , spiral air passages 10 a ′ may be provided both inside the aerosol generating substrate 10 and on the outer side wall of the aerosol generating substrate 10 .

The cross section of the spiral airway 10a′ that is perpendicular to the length direction of the aerosol generating substrate 10 is the cross section of the spiral airway 10a′. The shape of the cross section of the spiral airway 10a′ arranged inside the aerosol generating substrate 10 is not limited. For example, the shape of the cross section of the spiral airway 10a′ arranged inside the aerosol generating substrate 10 can be a circle as shown in Figure 3, or a polygon, such as a triangle, a square as shown in Figure 12, a prism as shown in Figure 13, etc., and can also be an ellipse, a runway shape, or an irregular shape, etc.

Similarly, the shape of the cross section of the spiral airway 10a′ arranged on the outer wall of the aerosol generating substrate 10 is not limited. For example, the shape of the cross section of the spiral airway 10a′ arranged on the outer wall of the aerosol generating substrate 10 can be a semicircle as shown in Figure 25, or it can be a semi-ellipse, a polygon or an irregular shape, etc.

In addition, when a plurality of spiral air channels 10a′ are arranged inside the aerosol generating matrix 10, the shapes of the cross sections of the spiral air channels 10a′ may be exactly the same, or the shapes of the cross sections of at least two of the spiral air channels 10a′ may be different. For example, the shape of the cross section of at least one spiral air channel 10a′ may be circular, and the shape of the cross section of at least one spiral air channel 10a′ may be polygonal.

When a plurality of spiral air channels 10a′ are provided on the outer wall of the aerosol generating matrix 10, the cross-sectional shapes of the spiral air channels 10a′ may be exactly the same, or the cross-sectional shapes of at least two of the spiral air channels 10a′ may be different. For example, the cross-sectional shape of at least one spiral air channel 10a′ may be semicircular, and the cross-sectional shape of at least one spiral air channel 10a′ may be polygonal.

The spiral air channel 10a' is provided inside the aerosol generating matrix 10, so as to increase the inner surface area of the aerosol generating matrix 10, thereby improving the heating efficiency and enhancing the user's inhalation experience.

The spiral air channel 10a' is provided on the outer wall of the aerosol generating substrate 10, which can increase the outer surface area of the aerosol generating substrate 10, which not only improves the heating efficiency and enhances the user's inhalation experience, but also facilitates the extraction of effective ingredients. In addition, if the heating method of the heating component is circumferential heating, The overall heating rate of the aerosol generating substrate 10 can be adjusted by this heating method to further enhance the user's experience.

By providing the spiral air channel 10a′ both inside the aerosol generating substrate 10 and on the outer wall of the aerosol generating substrate 10, the inner surface area and the outer surface area of the aerosol generating substrate 10 can be increased at the same time, and a better effect can be achieved compared with only providing the spiral air channel 10a′ inside the aerosol generating substrate 10 or only providing the spiral air channel 10a′ on the outer wall of the aerosol generating substrate 10.

In one embodiment, referring to FIGS. 7 and 22 to 24 , the airway 10a may further include at least one straight airway 10a″, and the straight airway 10a″ penetrates at least one end of the aerosol generating substrate 10 along the length direction in a straight line. That is, the straight airway 10a″ may penetrate one end of the aerosol generating substrate 10 along the length direction in a straight line, and the other end may be a closed end, and the straight airway 10a″ may also penetrate opposite ends of the aerosol generating substrate 10 along the length direction in a straight line.

The straight air passage 10a" extends along a straight line, or in other words, the extending direction of the straight air passage 10a" is a straight line. The number of the straight air passage 10a" may be one or more.

Please refer to Figures 7 and 24. A straight airway 10a″ may be provided inside the aerosol generating substrate 10. That is, the inlet and outlet of the straight airway 10a″ may be respectively visible from opposite ends of the aerosol generating substrate 10 along the length direction. However, the straight airway 10a″ is not visible from the side of the aerosol generating substrate 10, which is equivalent to providing a hole-shaped straight airway 10a″ inside the aerosol generating substrate 10.

Please refer to Figure 22. A straight airway 10a″ may also be provided on the outer wall of the aerosol generating substrate 10. That is, a partial area of the outer wall of the aerosol generating substrate 10 is recessed to form the straight airway 10a″, which is equivalent to seeing a groove-shaped straight airway 10a″ on the outer wall of the aerosol generating substrate 10. The groove-shaped straight airway 10a″ cooperates with the outer wrapping layer 30 to form an airflow channel located outside the aerosol generating substrate 10.

It is also possible to simultaneously provide straight air passages 10 a ″ inside the aerosol generating substrate 10 and on the outer sidewall of the aerosol generating substrate 10 .

The cross section of the straight airway 10a" perpendicular to the length direction of the aerosol generating substrate 10 is the cross section of the straight airway 10a", and the shape of the cross section of the straight airway 10a" arranged inside the aerosol generating substrate 10 is not limited. For example, the cross section of the straight airway 10a" arranged inside the aerosol generating substrate 10 is The shape of the cross section may be a circle as shown in FIG. 7 , or may be an ellipse, a racetrack, a polygon, or an irregular shape.

Similarly, the shape of the cross section of the straight airway 10a" provided on the outer wall of the aerosol generating substrate 10 is not limited. For example, the shape of the cross section of the straight airway 10a" provided on the outer wall of the aerosol generating substrate 10 can be a semicircle as shown in FIG. 22, or a semi-ellipse, a polygon, or an irregular shape.

In addition, when a plurality of straight airways 10a″ are provided inside the aerosol generating matrix 10, the cross-sectional shapes of the straight airways 10a″ may be exactly the same, or the cross-sectional shapes of at least two of the straight airways 10a″ may be different, for example, the cross-sectional shape of at least one straight airway 10a″ may be circular, and the cross-sectional shape of at least one straight airway 10a″ may be polygonal.

When a plurality of straight air passages 10a″ are provided on the outer wall of the aerosol generating substrate 10, the cross-sectional shapes of the straight air passages 10a″ may be exactly the same, or the cross-sectional shapes of at least two of the straight air passages 10a″ may be different, for example, the cross-sectional shape of at least one of the straight air passages 10a″ may be semicircular, and the cross-sectional shape of at least one of the straight air passages 10a″ may be polygonal.

That is to say, while the spiral air channel 10a' is provided, a straight air channel 10a" may also be provided, and the straight air channel 10a" may also increase the surface area of the aerosol generating matrix 10, improve the heating efficiency, and enhance the user's inhalation experience.

There can be many ways to combine the straight airway 10a″ and the spiral airway 10a′. For example, please refer to Figures 7 to 9. A spiral airway 10a′ and a straight airway 10a″ can be set inside the aerosol generating substrate 10, and the center line of the straight airway 10a″ along the extension direction coincides with the central axis C of the aerosol generating substrate 10 along the length direction.

The coincidence mentioned here means that the center line of the straight airway 10a″ along the extension direction roughly coincides with the central axis C of the aerosol generating substrate 10 along the length direction. That is to say, there can be a certain deviation between the center line of the straight airway 10a″ along the extension direction and the central axis C of the aerosol generating substrate 10 along the length direction, but the central axis C of the aerosol generating substrate 10 along the length direction will at least pass through the straight airway 10a″.

During the manufacturing process of the aerosol generating substrate 10, the aerosol generating substrate 10 may be formed into the spiral air channel 10a' by plastic rotation. The central area of the aerosol generating substrate 10 (i.e., the central axis C and the area close to the central axis C) will not change significantly, that is, the central area of the aerosol generating substrate 10 will not be significantly twisted. Therefore, a straight airway 10a″ can be set in the central area of the aerosol generating substrate 10.

The straight airway 10a″ located on the central axis C can make the aerosol at the medium outlet gather during the heating and puffing process (the flow rate of the central hole of the medium is faster, and a negative pressure area can be formed at the outlet of the central hole of the medium, thereby gathering the aerosol flowing out of the outer hole), thereby improving the "aggregation" of the aerosol; in addition, this setting can also improve the stability of the aerosol temperature at the medium outlet (the aerosol flow rate of the central hole is fast, and the aerosol temperature changes little, which can reduce the temperature change rate after the aerosol is gathered), thereby improving the consumer's puffing experience.

Exemplarily, referring to FIG. 22 , the spiral air channel 10a′ may be disposed inside the aerosol generating substrate 10, and the straight air channel 10a″ may be disposed at least on the outer side wall of the aerosol generating substrate 10. That is, the interior of the aerosol generating substrate 10 may be provided with a straight air channel 10a″ as shown in FIG. 22 , or may not be provided with a straight air channel 10a″.

Exemplarily, referring to Figures 23 and 24, the straight airway 10a″ may also be disposed inside the aerosol generating substrate 10, and the spiral airway 10a′ may be disposed at least on the outer side wall of the aerosol generating substrate 10. That is, the spiral airway 10a′ may be disposed inside the aerosol generating substrate 10, or the spiral airway 10a′ may not be disposed as shown in Figures 23 and 24.

Furthermore, for the aerosol generating substrate 10 having a plurality of air passages 10a disposed therein, no matter the air passages 10a are spiral air passages 10a′, straight air passages 10a″, or a combination of spiral air passages 10a′ and straight air passages 10a″, the air passages 10a may be arranged in a variety of ways.

For example, in one embodiment, please refer to Figures 7, 12 to 16, multiple airways 10a can be arranged to form multiple trajectory lines, wherein each airway 10a in a single trajectory line is linearly arranged along a first direction Z1, and multiple trajectory lines are arranged along a second direction Z2, and the first direction Z1 and the second direction Z2 are not parallel, that is, the multiple trajectory lines are not arranged along a straight line.

Exemplarily, referring to Figures 7, 12 and 13, each airway 10a in a single trajectory line can be arranged in a straight line along a first direction Z1, and multiple trajectory lines can be arranged along a second direction Z2 perpendicular to the first direction Z1. That is to say, multiple airways 10a can be arranged in a matrix shape as shown in Figures 7 and 12, or in a grid shape as shown in Figure 13.

Exemplarily, referring to FIGS. 14 to 18 , the airways 10 a in a single trajectory line may be arranged along a circumferential direction around the center of the aerosol generating substrate 10 , and a plurality of trajectory lines may be arranged along a radial direction of the aerosol generating substrate 10 .

The circumferential direction surrounding the center of the aerosol generating substrate 10 is equivalent to the first direction Z1, and the radial direction of the aerosol generating substrate 10 is equivalent to the second direction Z2, that is, the plurality of air channels 10a may be arranged in a ring shape.

Please continue to refer to Figures 7 and 12 to 14. The airways 10a in the multiple trajectory lines can be evenly distributed, that is, all the airways 10a are exactly the same, the airways 10a in a single trajectory line are equidistantly arranged, and the multiple trajectory lines are also equidistantly arranged.

The air channels 10a are evenly distributed, so that the mass per unit volume of the area where the air channels 10a are provided in the aerosol generating matrix 10 can be relatively uniform. Thus, during the heating and puffing process, the uniformity of aerosol release from the aerosol generating matrix 10 can be better improved, thereby improving the consistency of puffing.

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

For example, taking the case where multiple air passages 10a are arranged in a ring, for example, please refer to Figure 15, the air passages 10a in a single trajectory are repeatedly arranged, and the repeated arrangement means that the air passages 10a in the same exhaust passage are exactly the same. From the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10, the aperture of each air passage 10a can gradually increase, that is, the aperture of the air passages 10a in different trajectory lines is different, and the farther from the center of the aerosol generating substrate 10, the larger the aperture of the air passage 10a.

For example, referring to Fig. 16, the air passages 10a in a single trajectory are repeatedly arranged, and the spacing between the air passages 10a in two adjacent trajectory lines can be gradually reduced from the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10. In other words, the multiple trajectory lines are not arranged at equal distances, and the farther from the center of the aerosol generating substrate 10, the smaller the spacing between the air passages 10a in two adjacent trajectory lines.

The farther from the center of the aerosol generating substrate 10, the larger the pore size of the airway 10a is, and the farther from the center of the aerosol generating substrate 10, the larger the pore size of the airway 10a is. The smaller the spacing between the aerosol generating substrates 10, the closer they are to the central area of the aerosol generating substrate 10, and the greater the mass per unit volume of the aerosol generating substrate 10. When these two types of aerosol generating substrates 10 are adapted to the central heating method, the time required for heat to be conducted from the inside to the outside is longer, thereby extending the time for the outer wall of the aerosol generating substrate 10 to be heated, improving the uniformity of aerosol release from the aerosol generating substrate 10, and increasing the puffing time/number of puffs. At the same time, it can maintain the consistency of aerosol release, bringing a comfortable puffing experience to the user.

Continuing with the example of multiple airways 10a arranged in a ring, for example, please refer to Figure 17, the airways 10a in a single trajectory are repeatedly arranged, and the aperture of each airway 10a can gradually decrease from the center of the aerosol generating matrix 10 to the radial outside of the aerosol generating matrix 10, that is, the aperture of the airways 10a in different trajectory lines is different, and the farther away from the center of the aerosol generating matrix 10, the smaller the aperture of the airway 10a.

For example, referring to Fig. 18, the air passages 10a in a single trajectory are repeatedly arranged, and the spacing between the air passages 10a in two adjacent trajectory lines can gradually increase from the center of the aerosol generating substrate 10 to the radially outer side of the aerosol generating substrate 10. In other words, the multiple trajectory lines are not arranged at equal distances, and the farther from the center of the aerosol generating substrate 10, the larger the spacing between the air passages 10a in two adjacent trajectory lines.

The aerosol generating matrix 10 with a smaller pore size of the airway, and the aerosol generating matrix 10 with a larger spacing between the airways 10a in two adjacent trajectory lines, are closer to the outer wall of the aerosol generating matrix 10 and have a larger mass per unit volume of the aerosol generating matrix 10. When these two types of aerosol generating matrices 10 are adapted to the circumferential heating method, the time required for heat to be conducted from the outside to the inside is longer, thereby extending the time for the center of the aerosol generating matrix 10 to be heated, improving the uniformity of aerosol release from the aerosol generating matrix 10, and increasing the puffing time/number of puffs. At the same time, the consistency of aerosol release can be maintained, providing users with a comfortable puffing experience.

It should be noted that the non-uniform distribution of the air passages 10a in the multiple trajectory lines is not limited to the above four. Various adjustments can be made as needed. For example, the spacing between the air passages 10a in a single trajectory line can be changed, the shape of the cross section of the air passages 10a in different rows can be changed, and the shape of the cross section of the air passages 10a in different rows can be changed. The above-mentioned implementation method of changing the aperture can be combined with the implementation method of changing the spacing, and so on.

In addition, for multiple track lines arranged in a non-circular manner, such as the arrangements shown in FIG. 7 , FIG. 12 , and FIG. 13 , they may also be arranged in the non-uniform distribution manner described in the above embodiment.

In some embodiments, the plurality of air channels 10a inside the aerosol generating substrate 10 may also be randomly distributed. Among the plurality of randomly distributed air channels 10a, the cross-sectional shapes of the air channels 10a may be completely identical, or the cross-sectional shapes of at least two of the air channels 10a may be different, and similarly, the pore sizes of the air channels 10a may be completely identical, or the pore sizes of at least two of the air channels 10a may be different.

In addition, for the aerosol generating matrix 10 having a plurality of air passages 10a disposed therein, regardless of whether a plurality of trajectory lines are used or a randomly distributed arrangement is adopted, in one embodiment, please refer to Figures 10, 11, 15 to 18, each air passage 10a can be distributed in various regions within the aerosol generating matrix 10, that is, almost every region within the aerosol generating matrix 10 is provided with an air passage 10a, and there is no obvious region where no air passage 10a is disposed (Figures 10 and 11 do not take into account a smaller region where no air passage 10a is disposed near the outer wall of the aerosol generating matrix 10).

In another embodiment, referring to FIG. 12 and FIG. 14 , the interior of the aerosol generating substrate 10 has a first region 10b and a second region 10c, and the air passages 10a can be distributed in the first region 10b, that is, the air passages 10a can be provided only in the first region 10b, while the air passages 10a are not provided in the second region 10c. The number and position of the first region 10b and the second region 10c can be determined as required and are not limited here.

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

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

Claims (19)

An aerosol generating substrate has an airway, wherein the airway includes at least one spiral airway, the spiral airway runs through at least one end of the aerosol generating substrate along the length direction, and at least a partial area of the spiral airway along the extension direction is in a curved shape with a curvature not equal to 0. According to the aerosol generating substrate according to claim 1, the spiral air channel runs through opposite ends of the aerosol generating substrate along the length direction. According to the aerosol generating substrate according to claim 1 or 2, when the number of turns of the spiral airway around the central axis of the aerosol generating substrate along the length direction is less than one turn, in the extension direction of the spiral airway, the line connecting the starting point of the spiral airway and any point on the spiral airway except the starting point is inclined relative to the central axis of the aerosol generating substrate. According to the aerosol generating substrate according to claim 1 or 2, the spiral air channel is provided on at least one of the interior of the aerosol generating substrate and the outer side wall of the aerosol generating substrate. The aerosol generating substrate according to claim 4, wherein the spiral air channel has a cross section perpendicular to the length direction of the aerosol generating substrate; The cross-section of the spiral airway disposed inside the aerosol generating substrate is in the shape of a circle, an ellipse, a racetrack, a polygon and an irregular shape; and/or, The cross-section of the spiral airway disposed on the outer side wall of the aerosol generating substrate has a shape of one of a semicircle, a semi-ellipse, a polygon and an irregular shape. According to the aerosol generating substrate according to claim 1 or 2, the air channel further comprises at least one straight air channel, and the straight air channel passes through at least one end of the aerosol generating substrate along the length direction in a straight line. The aerosol generating substrate according to claim 6, wherein the spiral airway and the straight airway are provided inside the aerosol generating substrate, and the straight airway is The center line coincides with the central axis of the aerosol generating substrate along the length direction. The aerosol generating substrate according to claim 6, wherein the spiral air channel is arranged inside the aerosol generating substrate, and the straight air channel is arranged at least on the outer side wall of the aerosol generating substrate; or The straight air channel is arranged inside the aerosol generating substrate, and the spiral air channel is arranged at least on the outer side wall of the aerosol generating substrate. According to the aerosol generating substrate according to claim 1 or 2, the number of the spiral air channels is 1 to 730. According to the aerosol generating substrate according to claim 1 or 2, the interior of the aerosol generating substrate has a plurality of the airways, and the plurality of the airways are arranged to form a plurality of trajectory lines, wherein the airways in a single trajectory line are linearly arranged along the first direction, and the plurality of trajectory lines are arranged along the second direction, and the first direction and the second direction are not parallel. According to the aerosol generating substrate of claim 10, the airways in the plurality of trajectory lines are evenly distributed. According to the aerosol generating substrate of claim 10, each of the airways in a single trajectory line is arranged in a straight line along the first direction, and multiple trajectory lines are arranged along the second direction perpendicular to the first direction. According to the aerosol generating substrate of claim 10, each of the airways in a single trajectory line is arranged along a circumferential direction around the center of the aerosol generating substrate, and multiple trajectory lines are arranged along the radial direction of the aerosol generating substrate. According to the aerosol generating substrate of claim 10, the air passages in a single trajectory are repeatedly arranged, and the aperture of the air passages in each trajectory gradually increases or decreases from the center of the aerosol generating substrate to the radial outside of the aerosol generating substrate. According to the aerosol generating substrate of claim 10, the airways in a single trajectory are repeatedly arranged, and the spacing between the airways in two adjacent trajectory lines gradually increases or decreases from the center of the aerosol generating substrate to the radial outside of the aerosol generating substrate. According to the aerosol generating substrate according to claim 1 or 2, a plurality of the air passages are arranged inside the aerosol generating substrate, and the air passages are randomly distributed. The aerosol generating substrate according to claim 1 or 2, wherein a plurality of the air channels are arranged inside the aerosol generating substrate; The airways are distributed in various regions within the aerosol generating substrate; or, The interior of the aerosol generating substrate has a first region and a second region, and the air channels are distributed in the first region. An aerosol generating article comprising: The aerosol-generating substrate according to any one of claims 1 to 17; A functional segment disposed at one end of the aerosol generating substrate along the length direction, the functional segment at least comprising a filtering segment for filtering aerosol; An outer wrapping layer wraps around the outer peripheral side of the functional segment and the aerosol generating substrate. According to the aerosol generating article according to claim 18, the functional section also includes a cooling section, and the cooling section is located between the filtering section and the aerosol generating substrate.