AEROSOL GENERATING SUBSTRATE AND AEROSOL GENERATING ARTICLE

Description

CROSS-REFERENCE TO PRIOR APPLICATION

This application is a continuation of International Patent Application No. PCT/CN2023/099998, filed on Jun. 13, 2023, which claims priority to Chinese Patent Application No. 202310084346.3, filed on Jan. 20, 2023. The entire disclosure of both applications is hereby incorporated by reference herein.

FIELD

The present application relates to the technical field of a smoke generating article, and particularly relates to an aerosol generating substrate and an aerosol generating article.

BACKGROUND

A smoke generating article includes a smoke generating article for generating aerosol in a burning manner and a smoke generating article for generating aerosol in a heat-not-burn manner. A typical heat-not-burn article includes an aerosol generating substrate capable of being heated to volatilize to generate aerosol, such as a tobacco raw material, a fragrant raw material or/and an aerosol former, the aerosol generating substrate is heated by an external heat source to a degree of just being roasted, but the aerosol generating substrate may not burn. Through the loading of a great dose of the aerosol former, the aerosol former is released through high-temperature heating to form smoke in use.

In the related art, when the smoke generating article is heated, the resistance to draw (RTD) during heating is great, and the puff-by-puff differences of the aerosol volume is great.

SUMMARY

In an embodiment, the present invention provides an aerosol generating substrate, comprising: a plurality of airway holes internally formed, wherein each airway hole of the plurality of airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and wherein the plurality of airway holes are formed in the aerosol generating substrate in a uniformly distributed manner.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:

FIG. 1 is a schematic structure diagram of a first aerosol generating article in an embodiment of the present application;

FIG. 2 is a section view of the aerosol generating article as shown in FIG. 1;

FIG. 3 is a schematic structure diagram of a second aerosol generating article in an embodiment of the present application;

FIG. 4 is a schematic structure diagram of a first aerosol generating substrate in an embodiment of the present application;

FIG. 5 is a schematic structure diagram of a second aerosol generating substrate in an embodiment of the present application;

FIG. 6 is a section view of the aerosol generating substrate as shown in FIG. 5;

FIG. 7 is a schematic structure diagram of a third aerosol generating substrate in an embodiment of the present application;

FIG. 8 is a schematic structure diagram of a fourth aerosol generating substrate in an embodiment of the present application;

FIG. 9 is a schematic structure diagram of a fifth aerosol generating substrate in an embodiment of the present application;

FIG. 10 is a schematic structure diagram of a sixth aerosol generating substrate in an embodiment of the present application;

FIG. 11 is a schematic structure diagram of a seventh aerosol generating substrate in an embodiment of the present application;

FIG. 12 is a schematic structure diagram of an eighth aerosol generating substrate in an embodiment of the present application;

FIG. 13 is a schematic structure diagram of a ninth aerosol generating substrate in an embodiment of the present application;

FIG. 14 is a schematic structure diagram of a tenth aerosol generating substrate in an embodiment of the present application;

FIG. 15 is a schematic structure diagram of an eleventh aerosol generating substrate in an embodiment of the present application;

FIG. 16 is a schematic structure diagram of a twelfth aerosol generating substrate in an embodiment of the present application;

FIG. 17 is a schematic structure diagram of a thirteenth aerosol generating substrate in an embodiment of the present application;

FIG. 18 is a schematic structure diagram of a fourteenth aerosol generating substrate in an embodiment of the present application;

FIG. 19 is a schematic structure diagram of a fifteenth aerosol generating substrate in an embodiment of the present application;

FIG. 20 is a section view of a sixteenth aerosol generating substrate in an embodiment of the present application; and

FIG. 21 is a section view of a third aerosol generating article in an embodiment of the present application.

DETAILED DESCRIPTION

In an embodiment, the present invention provides an aerosol generating substrate and an aerosol generating article capable of reducing the resistance to draw during heating and improving the puff-by-puff drawing uniformity.

In an embodiment, the present invention provides an aerosol generating substrate, the aerosol generating substrate is internally formed with a plurality of airway holes, each of the airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner.

In an embodiment, each of the airway holes penetrates through two opposite ends of the aerosol generating substrate in the length direction; and in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the aerosol generating substrate is a circular shape.

In an embodiment, in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the aerosol generating substrate is an elliptical shape, a racetrack shape or a polygonal shape.

In an embodiment, in a plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway holes is a circular shape, an elliptical shape, a racetrack shape, a fan shape or a polygonal shape.

In an embodiment, all of the airway holes are distributed on a plurality of track lines, each of the airway holes on a single track line is in linear arrangement in a first direction, the plurality of track lines are distributed in a second direction, and the first direction is not parallel to the second direction.

In an embodiment, each of the airway holes on the single track line is equidistant and is in repeated arrangement.

In an embodiment, each of the airway holes on the single track line is distributed in a circumference direction around the center of the aerosol generating substrate, and the plurality of track lines are arranged in a concentric circle manner in the radial direction of the aerosol generating substrate.

In an embodiment, each of the airway holes on the single track line is in linear arrangement in the first direction, the plurality of track lines are parallel distributed in the second direction, and the first direction is perpendicular to the second direction.

In an embodiment, the airway holes are in array distribution, the quantity of the airway holes in the first direction is the same as the quantity of the airway holes in the second direction, each of the airway holes on the single track line is equidistant, and the distance between every two track lines is identical.

In an embodiment, the quantity of the airway holes on the single track line is 2 to 20, and the quantity of the plurality of track lines is 2 to 20.

In an embodiment, airway slots are formed in the outer side wall of the aerosol generating substrate, and the airway slots penetrate through at least one end of the aerosol generating substrate in the length direction.

In an embodiment, in the plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway slots is the same as the local shape of the airway holes.

In an embodiment, in the plane perpendicular to the length direction of the aerosol generating substrate, the shape of the cross section of the airway slots is an arc shape, a rectangular shape or a trapezoidal shape.

In an embodiment, the cross section area of the airway holes is 0.0019 mm² to 30 mm²; or the hydraulic diameter of the airway holes is 0.05 mm to 6 mm.

In an embodiment, the wall thickness of a partition wall between the adjacent airway holes is 10 μm to 800 μm.

In an embodiment, the center line of at least one of the airway holes in the plurality of the airway holes in the extending direction is coincident with the central axis of the aerosol generating substrate in the length direction.

Embodiments of the present application further provide an aerosol generating article, including:

• • the aerosol generating substrate;
  • a functional segment, arranged at one end of the aerosol generating substrate in the length direction, and at least including a filtering segment configured to filter aerosol; and
  • an outer wrapping layer, wrapping around the peripheral exterior of the functional segment and the aerosol generating substrate.

In an implementation, the functional segment further includes a cooling segment, and the cooling segment is positioned between the filtering segment and the aerosol generating substrate.

Embodiments of the present application provide an aerosol generating substrate and an aerosol generating article. The aerosol generating substrate is internally formed with a plurality of airway holes, each of the airway holes penetrates through at least one end of the aerosol generating substrate in a length direction, and the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner. When the aerosol generating substrate is heated, the aerosol generating substrate is heated to release aerosol, the aerosol flows out through micropores or gaps of the partition walls among the airway holes, is gathered into the airway holes, and is conveyed to an inhaling end under the effect of the inhaling negative pressure, that is, through the formation of the plurality of airway holes, the surface area (the side walls of the airway holes equal to a part of surface of the aerosol generating substrate) of the aerosol generating substrate is increased, so that the heat of the aerosol generating substrate may enter the inside of the aerosol generating substrate from the outer surface of the aerosol generating substrate. Compared to a structure adopting direct conduction in the aerosol generating substrate in the related art, the present application may improve the heating efficiency. Additionally, the airway holes are formed in the aerosol generating substrate in a uniformly distributed manner, so the mass of the aerosol generating substrate in the unit volume may be relatively uniform, thus the aerosol release uniformity of the aerosol generating substrate in the heating process may be improved, the aerosol conveying uniformity and heated uniformity are facilitated, and then the feeling of a user may be improved. That is, through the aerosol generating substrate in the embodiments of the present application, the use experience feeling of a user may be improved.

It should be noted that in a case of no conflict, embodiments in the present application and the technical features in the embodiments may be combined with each other. Detailed descriptions in specific implementations should be understood as explanations and descriptions on the objectives of the present application, and should not be construed as improper limitations to the present application.

An embodiment of the present application provides an aerosol generating article. Referring to FIG. 1 to FIG. 3, the aerosol generating article 100 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 in a length direction, and the functional segment 20 at least includes a filtering segment configured to filter aerosol. The filtering segment may also be called as a filter tip.

The outer wrapping layer 30 wraps around the outer peripheral sides of the functional segment 20 and the aerosol generating substrate 10.

The aerosol generating article 100 is configured to be matched with an aerosol generating device with a heating component to use. Specifically, the heating component heats the aerosol generating substrate 10 to generate aerosol, and a user inhales the aerosol filtered by the filtering segment of the functional segment 20.

It should be noted that the aerosol generating article 100 generates the aerosol through the aerosol generating substrate 10, and the functional segment 20 does not generate the aerosol.

It should be noted that the aerosol generating article in the embodiment of the present application may be applicable to a combustion manner, and may also be applicable to a heat-not-burn manner. In the embodiment of the present application, the description is provided by taking that the aerosol generating article 100 is applicable to a heat-not-burn manner as an example.

The heating component has many heating manners. Exemplarily, the heating manners include a center heating manner, a peripheral heating manner, a bottom air heating manner, etc. The center heating manner refers to a manner of inserting the heating component to the inside of the aerosol generating article 100 to bake and heat the aerosol generating article 100 from inside to outside. The peripheral heating manner refers to a manner of setting the heating component on the periphery of the aerosol generating article 100 to bake and heat the aerosol generating article 100 from the outside to the inside. The bottom heating manner refers to a manner of firstly heating the air by the heating component and then baking and heating the aerosol generating article 100 by hot air from bottom to top. These heating manners may be applied by specifically resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating technologies, etc., and are not specifically limited herein.

The functional segment 20 may only be provided with a filtering segment 21 as shown in FIG. 2, and may further be provided with a filtering segment 21 and a cooling segment 22 as shown in FIG. 21. For the functional segment 20 provided with the cooling segment 22, the cooling segment 22 is arranged between the filtering segment 21 and an aerosol generating substrate structure 10 to cool the aerosol before the aerosol is filtered by the filtering segment 21.

The cooling segment is configured to cool the aerosol before the aerosol is filtered by the filtering segment, so as to lower the temperature of the aerosol and avoid a “mouth burn” phenomenon when a user inhales the aerosol.

In some embodiments, the functional segment 20 may further be provided with a supporting segment, and the supporting segment has a certain structural strength, and achieves an axial limitation effect on the aerosol generating substrate 10. Specifically, when the aerosol generating article 100 is inserted into a heating chamber in the aerosol generating device, or when the heating component is inserted into the aerosol generating substrate 10, the supporting segment provides a counter-acting force for the aerosol generating substrate 10 to prevent the axial play of the aerosol generating substrate 10.

Another embodiment of the present application further provides an aerosol generating substrate, and the aerosol generating substrate 10 is configured for the aerosol generating article 100 in the embodiment of the present application. Referring to FIG. 1 to FIG. 21, the aerosol generating substrate 10 is internally formed with a plurality of airway holes 10a, and each of the airway holes 10a penetrates through at least one end of the aerosol generating substrate 10 in the length direction. That is, the airway holes 10a extend along the longitudinal direction of the aerosol generating substrate 10, and the airway holes 10a are formed in the aerosol generating substrate 10 in a uniformly distributed manner.

It should be noted that the “uniformly distributed” manner of the airway holes 10a includes the array or concentric circle distribution of the airway holes 10a. That is, the self arrangement manner of the airway holes 10a is uniform. It could be understood that the airway holes 10a may be non-uniform in the cross section of the aerosol generating substrate 10. That is, the airway holes 10a are in uniform distribution, but the airway holes 10a do not uniformly divide the whole aerosol generating substrate 10. For example, the cross section of the aerosol generating substrate 10 is in a circular shape, and the airway holes 10a in array distribution are not uniformly distributed in the cross section of the circular shape. The walls of the substrate of the airway holes 10a form the surface of the aerosol generating substrate 10, the surface area of the aerosol generating substrate 10 is increased by the airway holes 10a, the heat transfer is convenient, and the heating efficiency is improved. In addition, the aerosol flows out through the micropores, is gathered into the airway holes 10a, and is conveyed to the inhaling end under the effect of the inhaling negative pressure, the resistance to draw of the user during heating may be reduced, and the experience feeling of the user is improved.

A specific structure of the aerosol generating substrate 10 is not limited here. Exemplarily, in an embodiment, the aerosol generating substrate 10 may be made of an atomizing substrate per se, and for example, may be made of an aerosol generating fragrant substrate. In some other embodiments, the aerosol generating substrate 10 may further include a substrate and an atomizing substrate arranged on the substrate, and the substrate, for example, may be high-temperature-resistant carbon fiber. Therefore, through the arrangement of the substrate, the strength of the aerosol generating substrate 10 may be improved, and the high temperature to a certain degree may be borne without generating peculiar smell.

The aerosol generating substrate 10, for example, is a recombinant tobacco substrate containing components such as an aerosol former and tobacco, is manufactured through an extrusion process, and is of an integral structure. Therefore, the aerosol generating substrate 10 is still an integral substrate after it is heated to be inhaled or the heating is stopped, the disintegration falling problem will not occur, and the problems of filament falling and cleaning difficulty of a filament or granular aerosol generating substrate 10 in the related art are solved.

The aerosol generating substrate 10 may be formed through processes of pressing, extrusion, etc.

It should be noted that the condition that the airway holes 10a are uniformly distributed in the aerosol generating substrate 10 at least includes: the hole diameter of each of the airway holes 10a is substantially identical, and the wall thickness of the partition wall of the adjacent airway holes 10a is substantially identical.

Through the formation of the airway holes 10a inside the aerosol generating substrate 10, the surface area of the aerosol generating substrate 10 is increased, and the effects of improving the heating efficiency and improving the feeling of the user are achieved.

A plurality of airway holes 10a are formed inside the aerosol generating substrate in the embodiment of the present application, each of the airway holes 10a penetrates through the two opposite ends of the aerosol generating substrate 10 in the length direction, and the airway holes 10a are uniformly distributed in the aerosol generating substrate 10. When the aerosol generating substrate 10 is heated, the aerosol generating substrate 10 is heated to release aerosol, the aerosol flows out through micropores or gaps of the partition walls among the airway holes 10a, is gathered into the airway holes 10a, and is conveyed to the inhaling end under the effect of the inhaling negative pressure. That is, through the formation of the plurality of airway holes 10a, the surface area (the side walls of the airway holes 10a equal to a part of surface of the aerosol generating substrate 10) of the aerosol generating substrate 10 is increased, so that the heat of the aerosol generating substrate 10 may enter the inside of the aerosol generating substrate 10 from the outer surface of the aerosol generating substrate 10. Compared to a structure adopting direct conduction in the aerosol generating substrate 10 in the related art, the present application may improve the heating efficiency. In addition, the airway holes 10a are uniformly distributed in the aerosol generating substrate 10, the mass of the aerosol generating substrate 10 in the unit volume is relatively uniform, therefore, the aerosol release uniformity of the aerosol generating substrate 10 in the heating process may be improved, the aerosol conveying uniformity and heated uniformity are facilitated, and then the feeling of the user may be improved. That is, the aerosol generating substrate 10 in the embodiment of the present application may improve the use experience felling of the user.

The outer wrapping layer 30 wraps around the peripheral exterior of the functional segment 20 and the aerosol generating substrate 10.

The material of the outer wrapping layer 30 is not limited, and for example, includes but is not limited to one or a combination of several materials of fiber paper, a metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE and PBAT, etc.

In some embodiments, referring to FIG. 2, the functional segment 20 only includes a filtering segment 21. In some other embodiments, referring to FIG. 21, besides the filtering segment 21, the functional segment includes a supporting segment (not shown in the figures) and/or a cooling segment 22, and the supporting segment and/or the cooling segment 22 are/is arranged between the aerosol generating substrate 10 and the filtering segment 21.

The cooling segment 22 is configured to cool the aerosol before the aerosol is filtered by the filtering segment 21, so as to lower the temperature of the aerosol and avoid a “mouth burn” phenomenon when the user inhales the aerosol.

The material of the cooling segment 22 includes but is not limited to one or a combination of several materials of PE (polyethelme), PLA (Polylactic acid, also called as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), cellulose acetate fiber, and propylene fiber.

The material of the filtering segment includes but is not limited to one or a combination of several materials of PE (polyethelme), PLA (Polylactic acid, also called as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), cellulose acetate fiber, and propylene fiber.

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

The supporting segment has a certain structural strength, and achieves an axial limitation effect on the aerosol generating substrate 10. Specifically, when the aerosol generating article 100 is inserted into a heating chamber 200a in an aerosol generating device 200, or when the heating component is inserted into the aerosol generating substrate 10, the supporting segment provides a counter-acting force for the aerosol generating substrate 10 to prevent the axial play of the aerosol generating substrate 10.

A specific component of the aerosol generating substrate 10 is not limited here. Exemplarily, in an embodiment, the aerosol generating substrate 10 may include a plant component, an auxiliary component, an aerosol former component, and a binder component.

In an embodiment, the plant component is one or a combination of several kinds of powder formed by performing crushing treatment on tobacco raw materials, tobacco fragments, tobacco stems, tobacco powder, fragrant plants, etc. The plant component is used for generating aerosol with alkaloid when being heated.

In an embodiment, the auxiliary component may be one or a combination of several materials of an inorganic filler, a lubricating agent and an emulsifying agent. 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 component, at the same time, the inorganic filler also has micropores, and the wall material porosity after the plant component is formed may be improved, so that the aerosol release rate may be improved.

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 mobility 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.

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 in the storage process to a certain degree, enhance the stability of the fragrant substance, and improve the sensory quality of the product.

In an embodiment, the aerosol former component has an effect of generating a great amount of steam when being heated, so that the aerosol volume of the smoke generating article is improved. For example, the aerosol former 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).

In an embodiment, the binder component 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 used for bonding granules, so that they may not easily get loose. In addition, the water resistance of the aerosol generating substrate 10 is improved, it is harmless to the human body, and a certain health care effect is achieved.

In some embodiments, referring to FIG. 16, the airway holes 10a penetrate through the same end of the aerosol generating substrate 10 in the length direction, and the other end is a sealed end.

In some other embodiments, referring to FIG. 20, a part of the airway holes 10a penetrate through one end of the aerosol generating substrate 10 in the length direction, and the other part of the airway holes 10a penetrate through the other end of the aerosol generating substrate 10 in the length direction.

In some further other embodiments, referring to FIG. 6 to FIG. 14, each of the airway holes 10a penetrates through two ends of the aerosol generating substrate 10 in the length direction. It could be understood that compared to a condition that the airway holes 10a penetrate through one end of the aerosol generating substrate 10 in the length direction, the condition that the airway holes 10a penetrate through two ends of the aerosol generating substrate 10 in the length direction is more favorable for reducing the resistance to draw of the user during heating.

Exemplarily, referring to FIG. 4 to FIG. 20, the aerosol generating substrate 10 is in a cylindrical shape. That is, in a plane perpendicular to the length direction of the aerosol generating substrate 10, the profile of the cross section of the aerosol generating substrate 10 is approximately in a circular shape. The appearance of the cylindrical aerosol generating substrate 10 is regular, so that the manufacturing process difficulty may be reduced. In an embodiment, referring to FIG. 8 to FIG. 14, airway slots 10b are formed in the outer side wall of the aerosol generating substrate 10, the airway slots 10b penetrate through at least one end of the aerosol generating substrate 10 in the length direction, that is, parts of regions of the outer side wall of the aerosol generating substrate 10 are recessed to form the airway slots 10b, and it equals to that the concave airway slots 10b may be seen on the outer side wall of the aerosol generating substrate 10.

The expression that the airway slots 10b penetrate through at least one end of the aerosol generating substrate 10 in the length direction refers to that the airway slots 10b may penetrate through the two opposite ends of the aerosol generating substrate 10 in the length direction, or one ends of the airway slots 10b may penetrate through the end surface of the aerosol generating substrate 10 in the length direction, and the other ends of the airway slots 10b are blind ends. It could be understood that compared to a condition that the airway holes 10a penetrate through one end of the aerosol generating substrate 10 in the length direction, the condition that the airway holes 10a penetrate through two ends of the aerosol generating substrate 10 in the length direction is more favorable for reducing the resistance to draw of the user during heating.

Referring to FIG. 3, the outer wrapping layer 30 on the outer periphery of the aerosol generating substrate 10 may seal the airway slots 10b on the outer periphery of the aerosol generating substrate 10, so that the airway slots 10b may also be configured as airflow passages for the aerosol. Therefore, the air intake volume and the aerosol extraction efficiency may be improved. In addition, if the heating manner of the heating component is peripheral heating, the integral heating rate of the aerosol generating substrate 10 may be adjusted by the heating manner, and an effect of improving the feeling of the user is achieved.

The quantity of the airway slots 10b is not limited here. For example, the quantity of the airway slots 10b may be one or more.

It should be noted that the shape of the aerosol generating substrate 10 is not limited here. Exemplarily, in a plane perpendicular to the length direction of the aerosol generating substrate 10, the shape of the cross section of the aerosol generating substrate 10 includes but is not limited to a circular shape, an elliptical shape, a racetrack shape, a fan shape or a polygonal shape.

The shape of the cross section of the aerosol generating substrate 10 refers to the shape of the cross section of the aerosol generating substrate 10 obtained by cutting along the plane perpendicular to the length direction of the aerosol generating substrate 10.

The racetrack shape refers to a shape similar to an athletics racetrack formed by alternately connecting two semicircles and two parallel straight edges.

It should be noted that the shape of the airway holes 10a is not limited here. Exemplarily, in a plane perpendicular to the length direction of the aerosol generating substrate 10, the shape of the cross section of the airway holes 10a includes but is not limited to a circular shape, an elliptical shape, a racetrack shape or a polygonal shape. The polygonal shape includes a regular or irregular polygonal shape.

The shape of the cross section of the airway holes 10a refers to the shape of the cross section of the airway holes 10a obtained by cutting along the plane perpendicular to the length direction of the aerosol generating substrate 10.

It should be noted that the shape of the airway slots 10b is not limited here. Exemplarily, in an embodiment, in the plane perpendicular to the length direction of the aerosol generating substrate 10, the shape of the cross section of the airway slots 10b includes but is not limited to a semicircular shape, an arc shape, a V shape, a rectangular shape or a trapezoidal shape.

In some other embodiments, in a plane perpendicular to the length direction of the aerosol generating substrate 10, the shape of the cross section of the airway slots 10b is the same as the local shape of the airway holes 10a. That is, the shape of the cross section of the airway slots 10b is the same as the local shape of the airway holes 10a, for example, the shape of the cross section of the airway holes 10a is a circular shape, and the shape of the cross section of the airway slots 10b is a semicircular shape. In a forming process, the airway slots 10b may be formed based on a same mold of the airway holes 10a. The mold design is convenient, the mold cost is reduced, and the production cost is reduced.

In addition, the shape of the cross section of each of the airway holes 10a may be completely the same, or the shapes of the cross sections of at least two of the airway holes 10a may be different. For example, the shape of the cross section of at least one of the airway holes 10a may be a circular shape, and the shape of the cross section of at least one of the airway holes 10a is a polygonal shape.

When the plurality of airway slots 10b are formed in the outer side wall of the aerosol generating substrate 10, the shape of the cross section of each of the airway slots 10b may be completely the same, or the shapes of the cross sections of at least two of the airway slots 10b are different. For example, the shape of the cross section of at least one airway slot 10b is a semicircular shape, and the shape of the cross section of at least one airway slot 10b is a polygonal shape.

Through the formation of the airway holes 10a in the aerosol generating substrate 10, the inner surface area of the aerosol generating substrate 10 is increased, and the heating efficiency may be improved. At the same time, the aerosol flows out through the micropores or the gaps of the partition walls among the airway holes 10a, is gathered into the uniformly distributed airway holes 10a, and is conveyed to the inhaling end under the effect of the inhaling negative pressure, the uniform distribution of the airway holes 10a is favorable for the aerosol conveying uniformity and heated uniformity, and the feeling of the user is improved.

Through the formation of the airway slots 10b on the outer side wall of the aerosol generating substrate 10, the outer surface area of the aerosol generating substrate 10 is increased, and the effects of improving the heating efficiency and improving the feeling of the user are achieved. Moreover, the effective component extraction is facilitated. In addition, if the heating manner of the heating component is peripheral heating, the integral heating rate of the aerosol generating substrate 10 may be adjusted by using the heating manner, and the effect of improving the feeling of the user is achieved. At the same time, the aerosol may flow out through the micropores or the gaps on the aerosol generating substrate 10, be gathered into the airway slots 10b, and be conveyed to the inhaling end under the effect of the inhaling negative pressure, the formation of the airway slots 10b is favorable for the aerosol conveyance, and the use experience feeling of the user is further improved.

The airway holes 10a are formed inside the aerosol generating substrate 10, and the airway slots 10b are formed in the outer side wall of the aerosol generating substrate 10, so that the inner surface area and the outer surface area of the aerosol generating substrate 10 is increased at the same time. Compared to a condition of only forming the airway holes 10a inside the aerosol generating substrate 10, this arrangement manner may achieve a better effect.

The arrangement manner of the airway holes 10a uniformly distributed in the aerosol generating substrate 10 is not limited.

Exemplarily, all of the airway holes 10a are distributed on a plurality of track lines, each of the airway holes 10a on a single track line is in linear arrangement in a first direction Z1, the plurality of track lines are distributed in a second direction Z2, and the first direction Z1 is not parallel to the second direction Z2. That is, a plurality of rows of airways are not in linear arrangement. The first direction Z1 and the second direction Z2 form a plane two-dimensional coordinate system, and the arrangement manner of the airway holes 10a may be defined by the first direction Z1 and the second direction Z2. That is, the airway holes 10a have a special arrangement rule. Therefore, each of the airway holes 10a may be processed in the forming process according to the preset arrangement rule.

Exemplarily, referring to FIG. 4 to FIG. 14, each of the airway holes 10a of the single track line is in equidistant formation. The equidistant formation refers to that the distances between holes centers of two adjacent airway holes 10a is the same. Therefore, the shape and size of the partition wall between the adjacent two airway holes 10a are approximately the same. Therefore, the aerosol release uniformity of the aerosol generating substrate 10 in the heating process may be improved, the aerosol conveying uniformity and heated uniformity are facilitated, and then the feeling of the user may be improved. That is, the aerosol generating substrate 10 in the embodiment of the present application may improve the use experience felling of the user.

It should be noted that the first direction Z1 may be a straight line, or may be a curve; and the second direction Z2 may be a straight line, or may be a curve.

Exemplarily, each of the airway holes 10a on the single track line may be in linear arrangement in the first direction Z1, and the plurality of track lines may be distributed in the second direction Z2 perpendicular to the first direction Z1. As shown in FIG. 14, FIG. 15, and FIG. 17, each of the airway holes 10a on the single track line is in linear arrangement in the first direction Z1, the plurality of track lines are parallel arranged in the second direction Z2, and a plurality of rows of airway holes in non-array arrangement are formed. As shown in FIG. 5, FIG. 7, and FIG. 10 to FIG. 13, the airway holes 10a are in an array arrangement.

Exemplarily, under the condition that the first direction Z1 and the second direction Z2 are straight line directions perpendicular to each other, referring to FIG. 5, FIG. 7, and FIG. 10 to FIG. 13, the airway holes are in array distribution, the airway holes on the single track line are equidistant, and the distances among all the track lines are the same. That is, the distance between the two adjacent airway holes 10a on the single track line and the distance between the two adjacent track lines are the same. Therefore, the wall thickness of the substrate between any two adjacent airway holes 10a is the same, so that the aerosol may be heated and released conveniently and uniformly.

Exemplarily, in some embodiments, referring to FIG. 5, FIG. 7, and FIG. 10 to FIG. 13, the airway holes are in array distribution, specifically, the array distribution refers to an N*M integral arrangement manner, N represents the quantity of the airway holes 10a on the single track line, M represents the quantity of the track lines, and N and M may be the same (the quantities of the airway holes in the first direction Z1 and the second direction Z2 are the same), or may be different (the quantities of the airway holes in the first direction Z1 and the second direction Z2 are different).

Exemplarily, in some other embodiments, referring to FIG. 17, the distribution manner of the airway holes 10a is the distribution of omitting top corner positions on the basis of the array distribution.

In an embodiment, each of the airway holes 10a of the single track line is in equidistant and repeated arrangement. That is, each airway in the same row of airways is completely the same. That is, each of the airway holes 10a in each one row of a plurality of rows of airway holes 10a is in equidistant and repeated arrangement. It should be noted that each of the airway holes 10a on the single track line has many equidistant and repeated arrangement forms. Exemplarily, in some embodiments, each of the airway holes 10a on the single track line is in linear equidistant and repeated arrangement. In some other embodiments, the single track line is arranged in the circumferential direction around the center of the aerosol generating substrate 10.

In a specific embodiment, all of the airway holes 10a are in array distribution. FIG. 5 and FIG. 6 show a three-row and three-column array, the shape and the size of each of the airway holes 10a are consistent, and the distances of the airway holes 10a in adjacent rows or columns are identical. In this embodiment, the cylindrical airway holes 10a are in array uniform distribution, and have the advantage that the distance between the two adjacent holes is identical, so that the wall thickness of the partition wall between the adjacent airway holes 10a may be identical, the aerosol may be uniformly released into the ring-shaped airway holes 10a through the micropores or gaps of the partition wall of the adjacent airway holes 10a, and the aerosol release is uniform and stable. In addition, in this embodiment, the center of the aerosol generating substrate 10 is provided with the airway hole 10a. According to the fluid mechanics rules, the center flow speed is higher than the peripheral flow speed in the negative pressure inhaling process. Therefore, through the design of the center airway hole 10a, the uniform release of the aerosol from the center to the periphery may be further enhanced, or the aerosol uniform release of the integral aerosol generating substrate 10 may be stabilized. The outer periphery of the aerosol generating substrate 10 is coated with paper or another barrier material, the outer peripheral airway slots 10b of the substrate may be further sealed, and effects of increasing the air intake volume and improving the aerosol extraction efficiency are achieved.

In another specific embodiment, all of the airway holes 10a are in array distribution. FIG. 7, FIG. 12 and FIG. 13 show a four-row and four-column array, the shape and the size of each of the airway holes 10a are consistent, and the distances of the airway holes 10a in adjacent rows or columns are identical. In this embodiment, the cylindrical airway holes 10a are in array uniform distribution, and have the advantage that the distance between the two adjacent holes is identical, so that the wall thickness of the partition wall between the adjacent airway holes 10a may be identical, the aerosol may be uniformly released into the ring-shaped airway holes 10a through the micropores or gaps of the partition wall of the adjacent airway holes 10a, and the aerosol release is uniform and stable. In this embodiment, the center of the aerosol generating substrate 10 is provided with no airway hole 10a.

It could be understood that in other implementations, the quantities of rows and columns of the array may be different, for example, the quantity of rows may be 2, and the quantity of columns may be 3. In other implementations, the shape of the cross section of the airway holes 10a may be a regular triangular shape, a regular quadrangular shape, or a regular hexagonal shape, or may be other types of triangular or polygonal shapes.

In some other embodiments, referring to FIG. 18 and FIG. 19, a passage 10c includes a plurality of airway holes 10a, the airway holes 10a are formed inside the aerosol generating substrate 10, and all of the airway holes 10a are in single-row arrangement. That is, each of the airway holes 10a is in linear arrangement in a first direction Z1Z1, and the first direction Z1Z1 may be a straight line, or may be a curve. That is, the airway holes 10a are in regular arrangement. Therefore, each of the airway holes 10a may be conveniently processed in the forming process according to a preset arrangement rule. Exemplarily, each of the airway holes 10a is distributed in the circumferential direction around the center of the aerosol generating substrate 10.

Exemplarily, referring to FIG. 18 and FIG. 19, the airway holes 10a in this embodiment are in a circular fan shape. The plurality of airway holes 10a are uniformly distributed in the circumferential direction of a heating element 20. For example, when the quantity of the airway holes 10a is three, a central angle corresponding to each of the airway holes 10a is 120°; when the quantity of the airway holes 10a is four, a central angle corresponding to each of the airway holes 10a is 90°; and when the quantity of the airway holes 10a is six, a central angle corresponding to each of the airway holes 10a is 60°.

In this embodiment, a radial partition wall is arranged between every two adjacent airway holes 10a, and the wall thickness of the single radial partition wall in any position may be identical, or may be different.

In this embodiment, the flow rate of fresh airflow in the airway holes 10a may be effectively increased through the circular-fan-shaped airway holes 10a, so that the proportion of the aerosol in the airflow is reduced, and the temperature of the extracted aerosol is lowered. When the user performs interstitial drawing, the waste of the aerosol is little, so that the utilization rate of the aerosol is increased.

In an embodiment, the quantity of the airway holes 10a on the single track line is 2 to 20, and the quantity of rows of the plurality of track lines is 2 to 20.

It is found by researches that when the quantity of the airway holes 10a on the single track line or the quantity of rows of the plurality of track lines is greater than 20, the mass of the aerosol generating substrate 10 is low, the aerosol release time is short, the aerosol generating substrate 10 is easy to generate a burnt phenomenon, additionally, the aerosol generating substrate 10 is easy to generate a nonuniform aerosol release phenomenon (for example, the aerosol release amount of the first two puffs is great, and the aerosol release amount of last puffs is small) in the heated process, and the feeling of the user is influenced.

When the quantity of the airway holes 10a on the single track line or the quantity of rows of the plurality of track lines are in a range of 2 to 20, the flowing resistance of the aerosol generating substrate 10 is relatively low (i.e., the resistance to draw is relatively small), the aerosol inside the aerosol generating substrate 10 may be easily extracted, the aerosol release is uniform, the utilization rate is high, the aerosol generating substrate 10 may not easily generate a burnt phenomenon, and the use experience feeling of the user is relatively high.

Exemplarily, referring to FIG. 4, FIG. 8, and FIG. 9, each of the airway holes 10a on the single track line may be distributed in the circumferential direction around the center of the aerosol generating substrate 10, and the plurality of track lines may be distributed in a concentric circle manner in the radial direction of the aerosol generating substrate 10.

The circumferential direction around the center of the aerosol generating substrate 10 equals to the first direction Z1, and the radial direction of the aerosol generating substrate 10 equals to the second direction Z2. That is, the plurality of airway holes 10a may be distributed into a ring shape.

In a specific embodiment, all of the airway holes 10a are distributed in a shape of a plurality of circular rings. FIG. 4 shows a distribution shape of three circular rings, the cross section area of the airway holes 10a is in a circular shape, and in addition, the airway holes 10a of the two adjacent rings are in staggered distribution, that is, each hole of one ring is positioned between two holes of the other ring. In this embodiment, the cylindrical holes in circular ring-shaped distribution have the advantage that the distance between the two adjacent holes is identical, and in addition, the quantity of the adjacent outer ring ring-shaped holes and the quantity of the adjacent inner ring holes are distributed according to a certain supplementary rule. Therefore, the wall thickness of the partition wall of the adjacent airway holes 10a is identical, the aerosol may be uniformly released into the ring-shaped airway holes 10a through the micropores or gaps of the partition walls of the adjacent airway holes 10a, and the aerosol release is uniform and stable.

Continuously referring to FIG. 4 to FIG. 14, the airway holes 10a in the plurality of track lines are in uniform distribution. That is, all of the airway holes 10a are identical, each of the airway holes 10a on the single track line is in equidistant distribution, and the plurality of track lines are also in equidistant distribution (without considering a circle of region, provided with no airway hole 10a and having a small size, of the aerosol generating substrate 10 near the outer side wall as shown in FIG. 4 to FIG. 14).

Exemplarily, the hydraulic diameter of the airway hole 10a is 0.05 mm to 6 mm (millimeter), and for example, is 0.05 mm, 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 4 mm, 5 mm, and 6 mm.

In embodiments of the present application, the hydraulic diameter refers to a ratio of four times of the flow passage cross section area and the perimeter.

When the hydraulic diameter of the airway hole 10a is greater than 6 mm, the quantity of the airway holes 10a is small, the aerosol generating substrate 10 is easy to generate a burnt phenomenon, in addition, the aerosol generating substrate 10 is easy to generate a nonuniform aerosol release phenomenon in the heating process (for example, the aerosol release amount of the first two puffs is great, and the aerosol release amount of last puffs is small), and the feeling of the user is influenced.

When the hydraulic diameter of the airway hole 10a is smaller than 0.05 mm, the forming process difficulty may be obviously increased, the size of the airway hole 10a is difficult to control, and the defective product rate of the aerosol generating substrate 10 is increased.

When the hydraulic diameter of the airway hole 10a is in a range of 0.05 mm to 6 mm, the flowing resistance of the aerosol generating substrate 10 is relatively low (i.e., the resistance to draw is relatively small), the flowing speed of the aerosol is proper, the aerosol inside the aerosol generating substrate 10 may be easily extracted, the aerosol release is uniform, the utilization rate is high, the aerosol generating substrate 10 may not easily generate a burnt phenomenon, the use experience feeling of the user is relatively high, and the processing and manufacturing are convenient.

Preferably, the hydraulic diameter of the airway hole 10a is 0.1 mm to 3 mm (millimeter), and for example, is 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, and 3 mm.

Exemplarily, the cross section area of the airway hole 10a is 0.0019 mm² to 30 mm² (square millimeter), and for example, is 0.002 mm², 0.1 mm², 0.2 mm², 0.4 mm², 0.5 mm², 0.8 mm², 1 mm², 1.3 mm², 1.6 mm², 1.8 mm², 2 mm², 2.1 mm², 2.2 mm², 2.4 mm², 2.6 mm², 2.8 mm², 3 mm², 4 mm², 5 mm², and 6 mm².

In embodiments of the present application, the cross section area refers to the flow passage cross section area.

When the cross section area of the airway hole 10a is greater than 30 mm², the quantity of the airway holes 10a is small, the aerosol generating substrate 10 is easy to generate a burnt phenomenon, in addition, the aerosol generating substrate 10 is easy to generate a nonuniform aerosol release phenomenon in the heating process (for example, the aerosol release amount of the first two puffs is great, and the aerosol release amount of last puffs is small), and the feeling of the user is influenced.

When the cross section area of the airway hole 10a is smaller than 0.0019 mm², the forming process difficulty may be obviously increased, the size of the airway hole 10a is difficult to control, and the defective product rate of the aerosol generating substrate 10 is increased.

When the cross section area of the airway hole 10a is in a range of 0.0019 mm² to 30 mm², the flowing resistance of the aerosol generating substrate 10 is relatively low (i.e., the resistance to draw is relatively small), the flowing speed of the aerosol is proper, the aerosol inside the aerosol generating substrate 10 may be easily extracted, the aerosol release is uniform, the utilization rate is high, the aerosol generating substrate 10 may not easily generate a burnt phenomenon, the use experience feeling of the user is relatively high, and the processing and manufacturing are convenient.

Preferably, the cross section area of the airway hole 10a is 0.007 mm² to 7.1 mm² (square millimeter), and for example, is 0.1 mm², 0.2 mm², 0.4 mm², 0.5 mm², 0.8 mm², 1 mm², 1.3 mm², 1.6 mm², 1.8 mm², 2 mm², 2.1 mm², 2.2 mm², 2.4 mm², 2.6 mm², 2.8 mm², and 3 mm².

In an embodiment, the wall thickness of the partition wall between the adjacent airway holes 10a is 10 μm to 800 μm.

Under a condition of a certain appearance size of the aerosol generating substrate 10, the wall thickness of the partition wall of the adjacent airway holes 10a has a positive correlation relationship with the aerosol release amount of the aerosol generating substrate 10, and has a negative relation relationship with the quantity, the hole diameter, and the like of the airway holes 10a. If the quantity and the hole diameter of the airway holes 10a are greater, the cross section specific surface area of the airway holes 10a is greater, the aerosol flowing resistance of the aerosol generating substrate 10 is smaller, the smaller wall thickness of the partition wall of the adjacent airway holes 10a is more favorable for the heat penetration or diffusion, and the heat transfer efficiency is higher. In addition, if the wall thickness of the partition wall of the adjacent airway holes 10a is smaller, the mass of the aerosol generating substrate 10 is lower, the basic substance is reduced, the drawing quality is influenced, and the aerosol release amount is relatively reduced. In addition, the integral structure strength of the aerosol generating substrate 10 is influenced by the wall thickness of the partition wall of the adjacent airway holes 10a. Therefore, the setting of the wall thickness of the partition wall of the adjacent airway holes 10a needs to be harmonious and unified with the aerosol release amount, the heat transfer, and the integral structure strength of the aerosol generating substrate 10, that is, when the wall thickness of the partition wall of the adjacent airway holes 10a is 10 μm to 800 μm, the flowing resistance of the aerosol generating substrate 10 is relatively low (i.e., the resistance to draw is relatively small), the flowing speed of the aerosol is proper, the aerosol inside the aerosol generating substrate 10 may be easily extracted, the aerosol release is uniform, the utilization rate is high, the aerosol generating substrate 10 may not easily generate a burnt phenomenon, and the use experience feeling of the user is relatively high.

If the wall thickness of the partition wall of the adjacent airway holes 10a is larger, the mass of the aerosol generating substrate 10 is greater, the drawing puffs are more, but the heat transfer efficiency is lower, and an overheated condition with a heat source contact surface may occur. If the wall thickness of the partition wall of the adjacent airway holes 10a is smaller, the mass of the aerosol generating substrate 10 is smaller, the heat transfer speed is higher, and the drawing puffs are fewer. In addition, through the combined design of different wall thicknesses, the consumable resistance to draw, the effective component release speed of the aerosol generating substrate 10, the heat transfer rate of the aerosol generating substrate 10, the inhaling uniformity, and the like may be adjusted and controlled. For example, when the wall thickness of the partition wall of the adjacent airway holes 10a is smaller than 10 μm, the mass of the aerosol generating substrate 10 is smaller, the aerosol release amount is smaller, the aerosol release time is short, the supporting performance of the aerosol generating substrate 10 is poor, and the qualified product rate in the processing process of the aerosol generating substrate 10 is low. When the wall thickness of the partition wall of the adjacent airway holes 10a is greater than 800 μm, the mass of the aerosol generating substrate 10 is greater, it is unfavorable for the aerosol release, in addition, the integral resistance to draw of the aerosol generating substrate 10 is great, and the use experience feeling of the user is reduced.

Preferably, the wall thickness of the partition wall between the adjacent airway holes 10a is 10 μm to 400 μm.

In an embodiment, referring to FIG. 8 and FIG. 9, the center line of at least one airway hole 10a in the plurality of airway holes 10a in the extending direction is in coincidence with the central axis of the aerosol generating substrate 10 in the length direction. That is, the center of the aerosol generating substrate 10 is provided with the airway hole 10a.

The central axis of the aerosol generating substrate 10 in the length direction is a virtual reference line used as a reference.

The coincidence here refers to the approximate coincidence of the center line of the airway hole 10a in the extending direction and the central axis of the aerosol generating substrate 10 in the length direction, that is, there may be a certain deviation between the center line of the airway hole 10a in the extending direction and the central axis of the aerosol generating substrate 10 in the length direction, and the central axis of the aerosol generating substrate 10 in the length direction approximately passes through the center airway hole 10a.

The airway hole 10a positioned on the central axis may enable the aerosol in the substrate outlet position to be gathered in the heating and inhaling process (the flow rate in the substrate center hole is high, a negative pressure region may be formed in the substrate center hole outlet position, and further, the aerosol flowing out from outer edge holes may be gathered), and the “caking performance” of the aerosol is improved; and additionally, through such arrangement, the temperature stability of the aerosol in the substrate outlet position may be improved (the flow rate of the aerosol in the center hole is high, the temperature change of the aerosol is small, and the temperature change rate of the aerosol after being gathered may be reduced), and then the feeling of a customer may be improved.

In some other embodiments, all of the airway holes 10a may further be in cruciform distribution as shown in FIG. 19, star distribution as shown in FIG. 18, rhombic-shaped grid distribution as shown in FIG. 15, etc.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.

The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.