Aerosol generating article

Abstract

The application provides an aerosol generating article. The aerosol generating article includes a substrate segment, a cooling segment and a filter segment. The cooling segment is arranged at an end of the segment, the cooling segment is formed into an integral structure, and the cooling segment is formed with at least one air channel passing through at least one end of the cooling segment. The filter segment is arranged at an end of the cooling segment away from the substrate segment.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is based on and claims priority to U.S. Provisional Application No. 63 / 748,567 filed on January 23, 2025, the disclosure of which is hereby incorporated by reference in its entirety.BACKGROUND

[0002] Aerosol generating articles may also be referred to as Heated Not Burn (HNB) cigarettes in some cases, and generate aerosols by the HNB manner. Specifically, an HNB technology is a technology by which an aerosol generating article is heated, while temperature of heating is not sufficient to burn the aerosol generating article, and aerosols are released.

[0003] In the related art, an aerosol generating article includes a substrate segment and a cooling segment, the segment is heated to generate aerosols, the cooling segment is arranged at one end of the substrate segment, and the cooling segment is provided to reduce temperature of the aerosols. Some cooling segments are difficult to be manufactured and assembled due to their complicated structures. Therefore, how to reduce difficulty of manufacturing and assembling the cooling segment and improve performance of the cooling segment is a difficult point of research in the aerosol generating article industry at present.SUMMARY

[0004] The disclosure relates to the technical field of aerosol generation, and in particular to an aerosol generating article.

[0005] In view of this, according to a first aspect of disclosure, there is provided an aerosol generating article, the aerosol generating article includes a substrate segment, a cooling segment and a filter segment.

[0006] The cooling segment is arranged at an end of the substrate segment, the cooling segment is formed into an integral structure, and the cooling segment is formed with at least one air channel passing through at least one end of the cooling segment.

[0007] The filter segment is arranged at an end of the cooling segment away from the substrate segment.

[0008] In the first aspect of the disclosure, the substrate segment, the cooling segment and the filter segment are sequentially arranged along the axial direction, the cooling segment is located downstream of the substrate segment, the filter segment is located downstream of the cooling segment, and aerosols generated by heating the substrate segment flow through the cooling segment and the filter segment sequentially and then are used by a user.

[0009] In some embodiments, the cooling segment may be arranged at an end of the segment along an axial direction, and a cross-sectional shape of the cooling segment may be a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to the axial direction as a cross section.

[0010] In some embodiments, the cooling segment may have a length of 3 mm to 50 mm along an axial direction.

[0011] In some embodiments, the cooling segment may have a shrinkage rate of 0% to 15% after usage of the aerosol generating article.

[0012] In some embodiments, the filter segment may be formed into an integral structure, and the filter segment is formed with air channels passing through at least one end of the filter segment.

[0013] In some embodiments, a cross-sectional shape of the filter segment may be a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to an axial direction as a cross section.

[0014] In some embodiments, the filter segment may have a length of 3 mm to 8 mm along an axial direction.

[0015] In some embodiments, each of the air channels of the filter segment may have a cross-sectional area of 0.94 mm2 to 1.2 mm2.

[0016] In some embodiments, the filter segment may have a porosity of 50% to 70%.

[0017] In some embodiments, the filter segment may have a shrinkage rate of 0% to 15% after usage of the aerosol generating article.

[0018] In some embodiments, the air channels may include air holes arranged inside the filter segment, and the filter segment is provided with the air holes with at least two cross-sectional shapes.

[0019] In some embodiments, the at least one air channel may include a single air channel or multiple air channels, and include air holes arranged inside the cooling segment.

[0020] In some embodiments, the cooling segment may be provided with the air holes with at least two cross-sectional shapes.

[0021] In some embodiments, the at least one air air channel may include a single air channel or multiple air channels, and include grooves arranged in an outer circumferential surface of the cooling segment.

[0022] In some embodiments, each of the filter segment and the cooling segment may include a base material and an adhesive component, and the base material is in form of powders.

[0023] In some embodiments, the base material may include at least one of plant cellulose, microcrystalline cellulose, calcium carbonate, or silicon dioxide; and the adhesive component includes at least one of starch, cellulose, kudzu extraction, protein, gelatin, polylactic acid (PLA), or polyethylene terephthalate (PET).

[0024] In some embodiments, each of the filter segment and the cooling segment may include a liquid component, a proportion of the liquid component in the cooling segment is 0% to 50%, and a proportion of the liquid component in the filter segment is 0% to 50%.

[0025] In some embodiments, the filter segment may have a structure formed by filling at least one of cellulose acetate, paper materials, porous silica gel, or paper tubes.

[0026] In some embodiments, a cross-sectional shape of the cooling segment may be a circular shape, the cooling segment is provided with multiple air holes at interior thereof, and the multiple air holes are distributed in a mesh shape.

[0027] Or, the cross-sectional shape of the cooling segment is a circular shape, the cooling segment is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, the middle portion is provided with square-shaped air holes, the edge portion is provided with irregular shapes of air holes formed during extrusion.

[0028] Or, the cross-sectional shape of the cooling segment is a circular shape, the cooling segment has a radial-shaped structure at interior thereof, a cross-sectional shape of an air hole at the center of the cooling segment is a circular shape, and cross-sectional shapes of other air holes are irregular shapes.

[0029] Or, the cross-sectional shape of the cooling segment is a circular shape with grooves in an outer circumferential surface thereof, a cross-sectional shape of each of the air holes is a circular shape, and a cross-sectional shape of each of the grooves is a semicircular shape.

[0030] In some embodiments, the substrate segment may include at least one of a sheet substrate, a shredded substrate, or a granular substrate.BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG. 1 is a schematic cross-sectional view of an aerosol generating article according to a first embodiment of the disclosure.

[0032] FIG. 2 is a schematic cross-sectional view of an aerosol generating article according to a second embodiment of the disclosure.

[0033] FIG. 3 is a schematic cross-sectional view of an aerosol generating article according to a third embodiment of the disclosure.

[0034] FIG. 4 is a schematic structural diagram of a cooling segment according to a first embodiment of the disclosure.

[0035] FIG. 5 is a schematic structural diagram of a cooling segment according to a second embodiment of the disclosure.

[0036] FIG. 6 is a schematic structural diagram of a cooling segment according to a third embodiment of the disclosure.

[0037] FIG. 7 is a schematic structural diagram of a cooling segment according to a fourth embodiment of the disclosure.

[0038] FIG. 8 is a schematic structural diagram of a cooling segment according to a fifth embodiment of the disclosure.

[0039] FIG. 9 is a schematic structural diagram of a cooling segment according to a sixth embodiment of the disclosure.

[0040] FIG. 10 is a schematic structural diagram of a cooling segment according to a seventh embodiment of the disclosure.

[0041] FIG. 11 is a schematic structural diagram of a cooling segment according to an eighth embodiment of the disclosure.

[0042] FIG. 12 is a schematic structural diagram of a cooling segment according to a ninth embodiment of the disclosure.

[0043] FIG. 13 is a schematic structural diagram of a cooling segment according to a tenth embodiment of the disclosure.

[0044] FIG. 14 is a schematic structural diagram of a cooling segment according to an eleventh embodiment of the disclosure.

[0045] FIG. 15 is a schematic structural diagram of a cooling segment according to a twelfth embodiment of the disclosure.

[0046] FIG. 16 is a schematic structural diagram of a cooling segment according to a thirteenth embodiment of the disclosure.

[0047] FIG. 17 is a schematic structural diagram of a cooling segment according to a fourteenth embodiment of the disclosure.

[0048] FIG. 18 is a schematic structural diagram of a cooling segment according to a fifteenth embodiment of the disclosure.

[0049] FIG. 19 is a schematic structural diagram of a cooling segment according to a sixteenth embodiment of the disclosure.

[0050] FIG. 20 is a schematic structural diagram of a cooling segment according to a seventeenth embodiment of the disclosure.DETAILED DESCRIPTION

[0051] Embodiments of the disclosure and technical features in the embodiments may be combined with each other without conflict, and detailed descriptions in "DETAILED DESCRIPTION" should be understood as explanations of the purpose of the disclosure, and should not be considered as undue limitation of the disclosure.

[0052] In the embodiments of the disclosure, "axial direction Z" refers to a direction shown based on the drawings. It should be understood that these orientation terms are only intended to facilitate describing the disclosure and simplifying descriptions, rather than indicating or implying that a referred device or element must have a specific orientation or must be configured and operated in a specific orientation, and thus cannot be understood as limitation of the disclosure. In the embodiments of the disclosure, "multiple" includes two or more, and in the embodiments of the disclosure, "diameter" refers to a ratio of four times of a cross-sectional area to a circumference. "cross-sectional area" refers to an area of a cross section perpendicular to the axial direction. Taking an air hole of the embodiment of the disclosure as an example, when a cross-sectional shape of the air hole is a regular quadrilateral shape, the diameter is a ratio of four times of a cross-sectional area of the air hole with the regular quadrilateral shape to a circumference of the regular quadrilateral shape. For another example, when the cross-sectional shape of the air hole is a circular shape, the diameter is a hydrodynamic diameter of the air hole with the circular shape.

[0053] The disclosure will be further described in detail below with reference to the drawings and specific embodiments.

[0054] A conventional cigarette emits aerosols in a manner of igniting it to burn tobaccos.

[0055] An aerosol generating article emits aerosols in a not-burn manner, and the aerosol generating article generates the aerosols mainly by heating a substrate segment. An example of using a Heated Not Burn (HNB) cigarette as the aerosol generating article is taken, the substrate segment is made of tobacco materials, and may also be referred to as a tobacco segment. The HNB cigarette is heated by using a heating element in an aerosol generating device, such that the tobacco segment is just heated to an extent where it is sufficient for the tobacco segment to emit aerosols, while the tobacco segment is not burned.

[0056] In the related art, a filter segment is arranged at an end of the substrate segment, and the filter segment is usually made of cellulose acetate, to play a role of filtering the aerosols; however, it intercepts the aerosols significantly, affecting a smoking experience. In some cases, the entire substrate segment is heated in a sealed aerosol generating device. It needs to provide a cooling segment between the filter segment and the substrate segment, to achieve a purpose of reducing temperature of the aerosols. Some cooling segments are difficult to be manufactured and assembled due to their complicated structures and thus are difficult to be applied in actual production; some cooling segments cannot be produced due to high cost of their raw materials; materials of some cooling segments themselves may absorb the aerosols, resulting in that tasting and smoking effects become worse, and may have large interception of the aerosols, affecting the user's smoking experience. Furthermore, the intercepted aerosols are condensed and then may be permeated from the cooling segment onto an external paper of the cigarette, creating stains on exterior of the smoked aerosol generating article, further contaminating the aerosol generating device, and affecting the user's usage and sensory experience. Therefore, it needs to provide an aerosol generating article capable of improving at least one of the above problems in the related art.

[0057] With reference to FIGS. 1 to FIG. 3, an embodiment of the disclosure provides an aerosol generating article 100, the aerosol generating article 100 includes a substrate segment 101, a cooling segment 102 and a filter segment 103.

[0058] The cooling segment 102 is arranged at an end of the substrate segment 101, the cooling segment 102 is formed into an integral structure, and the cooling segment 102 is formed with at least one air channel 11 passing through at least one end of the cooling segment 102. The filter segment 103 is arranged at an end of the cooling segment 102 away from the substrate segment 101.

[0059] In some embodiments, the substrate segment 101 may be made of tobacco materials, and the substrate segment 101 may also be referred to as a tobacco segment. Of course, the substrate segment 101 may also be made of other herbal materials. The substrate segment 101 is heated and then generates aerosols to be inhaled by the user. In some embodiments, the aerosols may also be referred to as tobacco smoke.

[0060] The filter segment 103 is configured to filter the aerosols, and the filter segment 103 may be configured to remove smoke particles and water-soluble compounds from the aerosols during smoking, to provide a consumer with a smooth and comfortable tasting experience.

[0061] Exemplarily, the aerosol generating article 100 is used in cooperation with an aerosol generating device, the aerosol generating device includes a housing and a heating element, the housing is provided with an accommodation cavity, and the heating element generates heat when a portion of the aerosol generating article 100 corresponding to the substrate segment 101 is inserted into the accommodation cavity, thereby heating the substrate segment 101 to generate the aerosols.

[0062] Each of a direction the aerosol generating article 100 is inserted into the accommodation cavity and a direction the aerosol generating article 100 is taken out from the accommodation cavity is parallel to the axial direction Z.

[0063] In the embodiment of the disclosure, the cooling segment 102 may have a substantially columnar shape. The columnar shape may be a cylinder shape (that is, a cross-sectional shape thereof is a circular shape), a prismatic shape (that is, a cross-sectional shape thereof is a polygonal shape), an elliptical cylinder shape (that is, a cross-sectional shape thereof is an elliptical shape) or the like, which is not limited here.

[0064] In the embodiment of the disclosure, a plane perpendicular to the axial direction Z is taken as a cross section, unless otherwise stated.

[0065] The cooling segment 102 is formed with at least one air channel 11 passing through at least one end of the cooling segment 102. The air channel 11 may be provided for the aerosols to circulate through it, or may temporarily store the aerosols to play a role of slowing release thereof. In this way, the air channel 11 may achieve functions of temperature reduction, filtration, adjusting smoking resistance, etc.

[0066] The air channel 11 is a macroscopic passage, that is, the air channel 11 is formed mainly by processing, and sizes of the air channel 11 such as a cross-sectional area, a length or the like may be changed according to design requirements.

[0067] As an example, the air channel 11 may pass through one or two ends of the cooling segment 102, etc.

[0068] As an example, the air channel 11 may also pass through an outer circumferential surface of the cooling segment 102.

[0069] In some embodiments, a number of air channels 11 of the cooling segment 102 may be one or more.

[0070] In some embodiments, the air channel 11 of the cooling segment 102 may extend along the axial direction Z. Preferably, the air channel 11 passes through two ends of the cooling segment 102 along the axial direction Z.

[0071] The cooling segment 102 is formed into an integral structure, which means that the cooling segment 102 is obtained by extruding a substantially uniform slurry in one step, without further applying processes of changing external shapes such as folding, gathering together or the like to the cooling segment 102, and the cooling segment 102 is a single, indivisible and physically integral part, and its integral state may be maintained without help of external elements. For example, a cooling segment 102 monomer obtained by slurry extrusion is formed into an integral structure; however, a cooling segment 102 obtained by acquiring filamentous cellulose acetate monomers and then gathering multiple cellulose acetate monomers together is not formed into an integral structure.

[0072] The cooling segment 102 is configured to reduce temperature of the aerosols, and the cooling segment 102 is formed into an integral structure, which may reduce assembly steps and improve production efficiency.

[0073] In the embodiment of the disclosure, the substrate segment 101, the cooling segment 102 and the filter segment 103 are sequentially arranged along the axial direction Z, the cooling segment 102 is located downstream of the substrate segment 101, the filter segment 103 is located downstream of the cooling segment 102, and aerosols generated by heating the substrate segment 101 flow through the cooling segment 102 and the filter segment 103 sequentially and then are inhaled by the user. The cooling segment 102 is formed into an integral structure, which may simplify manufacturing process and reduce assembly steps and improve production efficiency. The air channels 11 of the cooling segment 102 may be provided for the aerosols to circulate through them, or may temporarily store the aerosols to play a role of slowing release thereof; may also significantly increase a specific surface area, which helps to reduce temperature of the aerosols; and may also play a role of adjusting smoking resistance, to provide the user with a good smoking experience.

[0074] In some embodiments, with reference to FIGS. 1 to FIG. 3, the aerosol generating article 100 may include a wrapping layer 104, the wrapping layer 104 may wrap around outer circumferences of the substrate segment 101, the cooling segment 102 and the filter segment 103. The wrapping layer 104 includes but is not limited to paper or other materials. The wrapping layer 104 fixes the substrate segment 101, the cooling segment 102 and the filter segment 103 together, to facilitate access to the aerosol generating article 100.

[0075] In some embodiments, the cooling segment 102 is formed into an integral structure by an extrusion process or a die-casting process. The cooling segment 102 formed by extrusion or die-casting has a substantially cylindrical shape.

[0076] As an example, the cooling segment 102 has an integrally formed porous structure manufactured by the extrusion process or the die-casting process. That is, the air channel 11 may be molded by extrusion or die-casting.

[0077] Exemplarily, the cooling segment 102 is formed into an integral structure by the extrusion process, and during extrusion, different raw materials may be mixed into a slurry in one step or multiple steps, and then the slurry may be extruded into a desired shape by an extruder. Based on different functions of structures to be extruded, different raw materials may be mixed to obtain different slurries, or the slurry may be extruded into different shapes of structures by using different shapes of molds. The air channel 11 may be formed on the cooling segment 102 by extrusion.

[0078] In some embodiments, the cooling segment 102 has a length of 3 mm to 50 mm along the axial direction Z.

[0079] Exemplarily, the length of the cooling segment 102 along the axial direction Z is any one of values of 3 mm, 10 mm, 25 mm and 50 mm, or a value between any two of the values.

[0080] In this embodiment, in case that the length of the cooling segment 102 along the axial direction Z is less than 3 mm, its cooling effect is relatively poor; in case that the length of the cooling segment 102 along the axial direction Z is greater than 50 mm, it may result in negative effects such as too high interception, a too heavy weight of the aerosol generating article 100, etc. When the length of cooling segment 102 along the axial direction Z is 3 mm to 50 mm, the cooling segment 102 may achieve a good cooling effect and may also reduce influence of interception.

[0081] In some embodiments, the cooling segment 102 has a shrinkage rate of 0% to 15% after usage of the aerosol generating article 100.

[0082] Exemplarily, the shrinkage rate of the cooling segment 102 is any one of values of 0%, 5% and 15%, or a value between any two of the values.

[0083] "after usage of the aerosol generating article 100" means after the aerosol generating article 100 is smoked, that is, after the substrate segment 101 is heated.

[0084] The shrinkage rate is a percentage ratio of an amount of shrinkage to a size before shrinkage, and the amount of shrinkage is a difference between sizes before and after shrinkage.

[0085] Exemplarily, a diameter before shrinkage refers to an initial diameter of the cooling segment 102 before usage of the aerosol generating article 100 and is defined as Da; a diameter after shrinkage refers to a remaining diameter of the cooling segment 102 after usage of the aerosol generating article 100 and is defined as Db; the shrinkage rate is defined as S, then S = (Da - Db) / Da * 100%.

[0086] The cooling segment 102 has a shrinkage rate of around 0%, which means that the cooling segment 102 does not shrink and deform after the aerosol generating article 100 is heated.

[0087] In this embodiment, in case that the shrinkage rate of the cooling segment 102 is greater than 15% after usage of the aerosol generating article 100, it may result in that the air channel 11 is changed during smoking, affecting the smoking experience. Therefore, the cooling segment 102 has a shrinkage rate of 0% to 15%, such that the cooling segment 102 maintains its initial shape to be unchanged substantially or changed very little, achieving good consistency of smoking.

[0088] In some embodiments, with reference to FIG. 3, the filter segment 103 is formed into an integral structure, and the filter segment 103 is formed with air channel 11 passing through at least one end of the filter segment 103.

[0089] The filter segment 103 is formed into an integral structure, which means that the filter segment 103 is obtained by molding a substantially uniform slurry in one step, without further applying processes of changing external shapes such as folding, gathering together or the like to the filter segment 103, and the filter segment 103 is a single, indivisible and physically integral part, and its integral state may be maintained without help of external elements. For example, a filter segment 103 monomer obtained by slurry extrusion is formed into an integral structure; however, a filter segment 103 obtained by acquiring a filamentous cellulose acetate monomer and then gathering multiple cellulose acetate monomers together is not formed into an integral structure.

[0090] The air channel 11 of the filter segment 103 is a macroscopic passage, the air channel 11 of the filter segment 103 may increase a specific surface area of the filter segment 103, and the air channel 11 may also be provided for the aerosols to circulate through it, or may temporarily store the aerosols to play a role of slowing release thereof. In this way, the air channel 11 may achieve functions of filtration, adjusting smoking resistance, etc.

[0091] As an example, the air channel 11 may pass through one or two ends of the filter segment 103, etc.

[0092] As an example, the air channel 11 may also pass through an outer circumferential surface of the filter segment 103.

[0093] In some embodiments, a number of air channels 11 of the filter segment 103 may be one or more.

[0094] In some embodiments, the air channel 11 of the filter segment 103 may extend along the axial direction Z. Preferably, the air channel 11 passes through two ends of the filter segment 103 along the axial direction Z.

[0095] In some embodiments, the filter segment 103 is formed into an integral structure by an extrusion process or a die-casting process. The filter segment 103 molded by extrusion or die-casting has a substantially cylindrical shape.

[0096] As an example, the filter segment 103 has an integrally formed porous structure manufactured by the extrusion process or the die-casting process. That is, the air channel 11 of the filter segment 103 may be molded by extrusion or die-casting.

[0097] Exemplarily, the filter segment 103 is formed into an integral structure by the extrusion process, and during extrusion, different raw materials may be mixed into a slurry in one step or multiple steps, and then the slurry may be extruded into a desired shape by an extruder. Based on different functions of structures to be extruded, different raw materials may be mixed to obtain different slurries, or the slurry may be extruded into different shapes of structures by using different shapes of molds. The air channel 11 may be formed on the filter segment 103 by extrusion.

[0098] In some embodiments, the filter segment 103 has a length of 3 mm to 8 mm along the axial direction Z. Exemplarily, the length of the filter segment 103 along the axial direction Z is any one of values of 3 mm, 5 mm and 8 mm, or a value between any two of the values. With such design, the filter segment 103 may achieve balance between filtration and requirements of the smoking resistance.

[0099] In some embodiments, each air channel 11 of the filter segment 103 has a cross-sectional area of 0.94 mm2 to 1.2 mm2. Exemplarily, the cross-sectional area of each air channel 11 of the filter segment 103 is any one of values of 0.94 mm2, 1 mm2 and 1.2 mm2, or a value between any two of the values. With such design, the filter segment 103 may achieve balance between filtration and requirements of the smoking resistance.

[0100] In some embodiments, the filter segment 103 has a porosity of 50% to 70%. Exemplarily, the porosity of the filter segment 103 is any one of values of 50%, 60% and 70%, or a value between any two of the values. With such design, the filter segment 103 is capable of filtering impurities and has a relatively small smoking resistance.

[0101] In some embodiments, the filter segment 103 has a shrinkage rate of 0% to 15% after usage of the aerosol generating article 100.

[0102] Exemplarily, the shrinkage rate of the filter segment 103 is any one of values of around 0%, 5% and 15%, or a value between any two of the values.

[0103] In this embodiment, in case that the shrinkage rate of the filter segment 103 is greater than 15% after usage of the aerosol generating article 100, it may result in that the air channel 11 is changed during smoking, affecting the smoking experience. Therefore, the filter segment 103 has a shrinkage rate of 0% to 15%, such that the filter segment 103 maintains its initial shape to be unchanged substantially or changed very little, achieving good consistency of smoking. In some embodiments, a cross-sectional area of the air channel 11 of the cooling segment 102 is equal to or greater than a cross-sectional area of the air channel 11 of the filter segment 103. The cross-sectional area of the air channel 11 of the cooling segment 102 is greater than the cross-sectional area of the air channel 11 of the filter segment 103, to provide a better cooling function. The cross-sectional area of the air channel 11 of the cooling segment 102 is equal to the cross-sectional area of the air channel 11 of the filter segment 103, such that smoking resistances of the two segments may tend to be consistent.

[0104] In some embodiments, a number of air channels 11 of the filter segment 103 is equal to or greater than a number of air channels 11 of the cooling segment 102. The number of air channels 11 of the filter segment 103 is greater than the number of air channels 11 of the cooling segment 102, such that a specific surface area of the filter segment 103 may be increased appropriately, and the filter segment 103 may provide a better filtration effect. The number of air channels 11 of the filter segment 103 is equal to the number of air channels 11 of the cooling segment 102, such that smoking resistances of the two segments may tend to be consistent.

[0105] In some embodiments, with reference to FIGS. 3 to FIG. 17, the at least one air channel 11 includes a single air channel 11 or multiple air channels 11, and include air holes 11a arranged inside the cooling segment 102. The air holes 11a may pass through one or two ends of the cooling segment 102 along the axial direction Z. The air holes 11a may effectively increase the specific surface area, which is beneficial to cool the aerosols and may also effectively adjust the smoking resistance.

[0106] A number of air holes 11a of the cooling segment 102 may be one or more.

[0107] In an embodiment in which the filter segment 103 is provided with air channels 11, the filter segment 103 may be provided with air holes 11a arranged inside the filter segment 103. The air holes 11a may pass through one or two ends of the filter segment 103 along the axial direction Z. A number of air holes 11a of the filter segment 103 may be one or more. The air holes 11a may effectively increase the specific surface area, which is beneficial for the filter segment 103 to adsorb granular impurities of the aerosols, and may also effectively adjust the smoking resistance.

[0108] In some embodiments, each air hole 11a has a cross-sectional area of 0.05 mm2 to 1.96 mm2, by taking a plane perpendicular to the axial direction Z as a cross section. Preferably, each air hole 11a has a cross-sectional area of 0.09 mm2 to 1.96 mm2. Exemplarily, the cross-sectional area of the air hole 11a may be any one of values of 0.05 mm2, 0.09 mm2, 1.1 mm2 and 1.96 mm2, or a value between any two of the values.

[0109] Based on simulation and experimental validation, a large variation range of the smoking resistance is present in case that the cross-sectional area of the air hole 11a is in a range of 0.27 mm2 to 0.67 mm2. Considering provision of a feature "specific surface area", a range of 0.05 mm2 to 1.96 mm2 may effectively cover a smoking resistance range required by the designed cooling segment 102 and filter segment 103. A smoking resistance when the cross-sectional area is less than 0.05 mm2 may be too large and thus may affect the smoking experience, while a smoking resistance when the cross-sectional area is greater than 1.96 mm2 may not be reduced any more with increase of the area of the air hole 11a. Therefore, the cross-sectional area of the air hole 11a may be 0.05 mm2 to 1.96 mm2, which may meet requirements of the smoking resistance.

[0110] In some embodiments, each air hole 11a has a hydrodynamic diameter of 0.3 mm to 1.4 mm. Exemplarily, the hydrodynamic diameter of the air hole 11a may be any one of values of 0.3 mm, 1 mm, 1.2 mm and 1.4 mm, or a value between any two of the values. With such design, the cross-sectional area of the air hole 11a may be controlled to be between 0.05 mm2 and 1.96 mm2, which may effectively cover a required smoking resistance range.

[0111] In some embodiments, a ratio of a sum of cross-sectional areas of all the air holes 11a to a cross-sectional area of the cooling segment 102 is 30% to 70%, by taking a plane perpendicular to the axial direction Z as a cross section.

[0112] As an example, the ratio of the sum of cross-sectional areas of all the air holes 11a to the cross-sectional area of the cooling segment 102 is any one of values of 30%, 50% and 70%, or a value between any two of the values.

[0113] The sum of cross-sectional areas of all the air holes 11a refers to a sum of cross-sectional areas of all the air holes 11a of the cooling segment 102 in a cross section perpendicular to the axial direction Z.

[0114] The cross-sectional area of the cooling segment 102 refers to an area of an outer contour shape of the cooling segment 102 in the cross section perpendicular to the axial direction Z.

[0115] The ratio of the sum of cross-sectional areas of all the air holes 11a to the cross-sectional area of the cooling segment 102 refers to a percentage of the sum of cross-sectional areas of all the air holes 11a to the cross-sectional area of the cooling segment 102.

[0116] In this embodiment, in case that the sum of cross-sectional areas of all the air holes 11a is too large, negative effects such as a poor interception effect, the aerosols scalding the mouth or the like may occur. In case that the sum of cross-sectional areas of all the air holes 11a is too small, phenomena such as a strong interception effect, a small amount of aerosols, reduced satisfaction or the like may occur. Therefore, the ratio of the sum of cross-sectional areas of all the air holes 11a to the cross-sectional area of the cooling segment 102 is 30% to 70%, which may achieve balance between the amount of aerosols and temperature of the aerosols.

[0117] In an embodiment in which the filter segment 103 is provided with air holes 11a, a ratio of a sum of cross-sectional areas of all the air holes 11a to a cross-sectional area of the filter segment 103 is 30% to 70%, by taking a plane perpendicular to the axial direction Z as a cross section. In this way, it may achieve balance between the amount of aerosols and temperature of the aerosols. The sum of cross-sectional areas of all the air holes 11a of the filter segment 103 is similar to the sum of cross-sectional areas of all the air holes 11a of the cooling segment 102, and the cross-sectional area of the filter segment 103 is similar to the cross-sectional area of the cooling segment 102, which are not elaborated here.

[0118] In some embodiments, with reference to FIGS. 4 to FIG. 17, a cross-sectional shape of the air hole 11a includes but is not limited to a regular shape or an irregular shape by taking a plane perpendicular to the axial direction Z as a cross section, and the cross-sectional shape of the air hole 11a includes but is not limited to a regular shape such as a circular shape, a regular triangular shape, a square shape, a regular pentagonal shape, a regular hexagonal shape or the like, or the cross-sectional shape of the air hole 11a may be another irregular shape except the above regular shape.

[0119] In some embodiments, with reference to FIGS. 4, FIG. 5, FIG. 11 and FIG. 12, the cooling segment 102 is provided with air holes 11a with at least two cross-sectional shapes. In case that a size of the cooling segment 102 is limited, flexibly designing a cross-sectional area and cross-sectional shape of each air hole 11a not only facilitates adjusting flow resistance of the aerosols, but also facilitates improving uniformity of heat dissipation.

[0120] In some embodiments, the air channels 11 include air holes 11a arranged inside the filter segment 103, and the filter segment 103 is provided with air holes 11a with at least two cross-sectional shapes. In case that a size of the filter segment 103 is limited, flexibly designing a cross-sectional area and cross-sectional shape of each air hole 11a facilitates adjusting flow resistance of the aerosols.

[0121] The cross-sectional shape of the air hole 11a of the cooling segment 102 may be the same as or different from a cross-sectional shape of the filter segment 103 according to requirements.

[0122] In some embodiments, with reference to FIGS. 4 and FIG. 11, a cross-sectional shape of one type of the air holes 11a is a portion of a cross-sectional shape of another type of the air holes 11a.

[0123] For example, the cross-sectional shape of one type of the air holes 11a is a square shape, and the cross-sectional shape of another type of the air holes 11a is a portion of the square shape. For example, the cross-sectional shape of one type of the air holes 11a is a diamond shape, and the cross-sectional shape of another type of the air holes 11a is a portion of the diamond shape.

[0124] In some embodiments, at least one of the cooling segment 102 or the filter segment 103 is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, the middle portion is provided with air holes 11a with a first cross-sectional shape, and the edge portion is provided with air holes 11a with a second cross-sectional shape. In this way, the air holes 11a with different cross-sectional shapes are distributed in regions in a concentrated manner, to facilitate manufacturing them.

[0125] In some embodiments, with reference to FIG. 11, the second cross-sectional shape is a portion of the first cross-sectional shape. Taking the extrusion process as an example, the second cross-sectional shape may be a shape formed by an outer circumferential edge cutting air holes 11a close to the outer circumferential edge during extrusion.

[0126] For example, the first cross-sectional shape is a diamond shape and is located at the middle portion, and the second cross-sectional shape is a portion of the diamond shape and is located at the edge portion which may be irregular shape.

[0127] In other embodiments, the second cross-sectional shape may not be a portion of the first cross-sectional shape, for example, the first cross-sectional shape is a circular shape, and the second cross-sectional shape is a square shape.

[0128] In some embodiments, with reference to FIG. 12, the air holes 11a with two cross-sectional shapes are alternately arranged at intervals in a first direction, and the air holes 11a with two cross-sectional shapes are alternately arranged at intervals in a second direction, the first direction intersects with the second direction. In this way, consistency of smoking may be improved by cooperation of the air holes 11a with two cross-sectional shapes.

[0129] Exemplarily, the air holes 11a with circular and square shapes are alternately arranged at intervals in the first direction and are alternately arranged at intervals in the second direction.

[0130] In some embodiments, with reference to FIGS. 17 to FIG. 20, the at least one air channel 11 includes a single air channel 11 or multiple air channels 11, and includes grooves 11b arranged in an outer circumferential surface of the cooling segment 102. The grooves 11b may pass through one or two ends of the cooling segment 102 along the axial direction Z. The grooves 11b are formed in the outer circumferential surface of the cooling segment 102, that is, the grooves 11b are open outward. The grooves 11b may increase an outer surface area of the cooling segment 102, improve an aerosol transmission efficiency, which is beneficial for the user to acquire active ingredients and is more beneficial for extraction of the active ingredients.

[0131] A number of grooves 11b in a single cooling segment 102 is not limited, and the number of grooves 11b may be one or more. Multiple grooves 11b may be arranged at intervals along a circumferential direction of the cooling segment 102.

[0132] The circumferential direction is a direction around the axial direction Z.

[0133] In an embodiment in which the filter segment 103 is provided with air channels 11, the filter segment 103 may be provided with grooves 11b arranged in an outer circumferential surface of the filter segment 103. The grooves 11b may pass through one or two ends of the filter segment 103 along the axial direction Z. The grooves 11b are formed in the outer circumferential surface of the filter segment 103, that is, the grooves 11b are open outward. The grooves 11b may increase an outer surface area of the filter segment 103, improve an aerosol transmission efficiency, which is beneficial for the user to acquire active ingredients and is more beneficial for extraction of the active ingredients.

[0134] A number of grooves 11b in a single filter segment 103 is not limited, and the number of grooves 11b may be one or more. Multiple grooves 11b may be arranged at intervals along a circumferential direction of the filter segment 103.

[0135] In some embodiments, with reference to FIGS. 17 to FIG. 20, a cross-sectional shape of the groove 11b includes but is not limited to a regular shape or an irregular shape by taking a plane perpendicular to the axial direction Z as a cross section. Exemplarily, the cross-sectional shape of the groove 11b includes but is not limited to a regular shape such as a semicircular shape, a trapezoidal shape, a triangular shape, etc. Or, the cross-sectional shape of the groove 11b may be another irregular shape except the above regular shape.

[0136] In some embodiments, the cooling segment 102 has a porosity of 2% to 15%.

[0137] Exemplarily, the porosity of the cooling segment 102 is any one of values of 2%, 10% and 15%, or a value between any two of the values.

[0138] In case that the porosity of the cooling segment 102 is less than 2%, a fragrance-adding function of the cooling segment 102 may be affected, and fragrance components carried by perfumes and spices of the cooling segment 102 are not released easily. In case that the porosity of the cooling segment 102 is greater than 15%, it may result in that the cooling segment 102 has a large shrinkage rate during smoking and is not stable in structure, thereby affecting the smoking experience such as the smoking resistance, the amount of aerosols, etc. Therefore, the cooling segment 102 has a porosity of 2% to 15%, to achieve balance between fragrance release and structural stability of the cooling segment 102.

[0139] The porosity of the cooling segment 102 refers to a ratio of a sum of volumes of all air channels 11 of the cooling segment 102 to a total volume of the cooling segment 102.

[0140] In some embodiments, the filter segment 103 has a porosity of 2% to 15%.

[0141] Exemplarily, the porosity of the filter segment 103 is any one of values of 2%, 10% and 15%, or a value between any two of the values.

[0142] In case that the porosity of the filter segment 103 is less than 2%, a fragrance-adding function of the filter segment 103 may be affected, and fragrance components carried by perfumes and spices of the filter segment 103 are not released easily. In case that the porosity of the filter segment 103 is greater than 15%, it may result in that the filter segment 103 has a large shrinkage rate during smoking and is not stable in structure, thereby affecting the smoking experience such as the smoking resistance, the amount of aerosols, etc. Therefore, the filter segment 103 has a porosity of 2% to 15%, to achieve balance between fragrance release and structural stability of the filter segment 103.

[0143] The porosity of the filter segment 103 refers to a ratio of a sum of volumes of all air channels 11 of the filter segment 103 to a total volume of the filter segment 103.

[0144] In some embodiments, with reference to FIGS. 4 to FIG. 20, the cooling segment 102 includes a support wall 12, the support wall 12 encloses to form the air channels 11, and the support wall 12 has a wall thickness in a range of 0.04 mm to 0.4 mm.

[0145] Exemplarily, the wall thickness of the support wall 12 is any one of values of 0.04 mm, 0.1 mm and 0.4 mm, or a value between any two of the values.

[0146] The support wall 12 is a solid structure, and design of the wall thickness is related to cross-sectional area and size of the air channel 11. When the wall thickness of the support wall 12 is too thick or too thin, the cross-sectional area of the air channel 11 may be compressed, thereby affecting an adjustable range of the smoking resistance and interception efficiency. When the wall thickness of the support wall 12 is 0.04 mm to 0.4 mm, the support wall 12 has a good structural strength, and the support wall 12 does not deform substantially during heating of the aerosol generating article 100, which may maintain shape of the air channel 11, may also balance adjustment of the smoking resistance, and meet requirements of the interception efficiency.

[0147] In some embodiments, the filter segment 103 includes a support wall 12, the support wall 12 encloses to form the air channels 11, and the support wall 12 has a wall thickness in a range of 0.04 mm to 0.4 mm.

[0148] Exemplarily, the wall thickness of the support wall 12 is any one of values of 0.04 mm, 0.1 mm and 0.4 mm, or a value between any two of the values.

[0149] When the wall thickness of the support wall 12 is 0.04 mm to 0.4 mm, the support wall 12 has a good structural strength, and the support wall 12 does not deform substantially during heating of the aerosol generating article 100, which may maintain shape of the air channel 11, may also balance adjustment of the smoking resistance, and meet requirements of the interception efficiency.

[0150] In some embodiments, the number of air holes 11a is multiple, and the support wall 12 is divided into an internal support wall 12 and an external support wall 12. Gaps between multiple internal support walls 12 form multiple air holes 11a. The internal support wall 12 refers to a solid material between the air holes 11a. The external support wall 12 refers to a solid material between an air hole 11a closest to the outer circumferential surface and the outer circumferential surface, and the external support wall 12 and the internal support wall 12 may form the grooves 11b together.

[0151] A wall thickness of the internal support wall 12 may be equal or unequal to a wall thickness of the external support wall 12. Wall thicknesses of multiple internal support walls 12 may be equal or unequal.

[0152] In some embodiments, the cooling segment 102 has a density of 1 g / cm3to 2.5 g / cm3.

[0153] Exemplarily, the density of the cooling segment 102 is any one of values of 1 g / cm3, 2 g / cm3 and 2.5 g / cm3, or a value between any two of the values.

[0154] The density of the cooling segment 102 depends on composite materials forming the cooling segment 102. When the density of the cooling segment 102 is less than 1 g / cm3, it easily results in a low strength of the cooling segment 102, it is difficult to mold the cooling segment 102 during extrusion, and it is difficult to store the cooling segment 102 after extrusion, with a risk of structural collapse; furthermore, low-density polymer materials usually have a large coefficient of thermal expansion, and may exhibit significant deformation in a high-temperature environment, resulting in poor consistency of smoking; furthermore, non-smooth surfaces and non-uniform textures or defects easily occur, which affects appearance quality of the product. When the density of the cooling segment 102 is greater than 2.5 g / cm3, molecular chains of high-density materials are more tight there-between, resulting in a high viscosity and poor fluidity, which may result in blockage of extrusion or non-smooth extrusion, and may also result in increase of energy consumption for production and significant increase of production cost. Therefore, when the density of the cooling segment 102 is 1 g / cm3 to 2.5 g / cm3, the cooling segment 102 has a good molding effect, a good structural stability and relatively low energy consumption for production.

[0155] The density of the cooling segment 102 refers to an actual mass of the cooling segment 102 per unit volume in an absolutely dense state, that is, a density obtained by removing the air channels 11 and micropores, that is, the volume here does not include volumes of the air channels 11 and micropores.

[0156] In some embodiments, the filter segment 103 has a density of 1 g / cm3to 2.5 g / cm3. With such design, the filter segment 103 has a good molding effect, a good structural stability and relatively low energy consumption for production.

[0157] Exemplarily, the density of the filter segment 103 is any one of values of 1 g / cm3, 2 g / cm3 and 2.5 g / cm3, or a value between any two of the values.

[0158] The density of the filter segment 103 refers to an actual mass of the filter segment 103 per unit volume in an absolutely dense state, that is, a density obtained by removing the air channels 11 and micropores, that is, the volume here does not include volumes of the air channels 11 and micropores.

[0159] In some embodiments, the cooling segment 102 has a diameter of 3.6 mm to 15 mm. Exemplarily, the diameter of the cooling segment 102 is any one of values of 3.6 mm, 5 mm, 10 mm, 12 mm and 15 mm, or a value between any two of the values.

[0160] In some embodiments, the filter segment 103 has a diameter of 3.6 mm to 15 mm. Exemplarily, the diameter of the filter segment 103 is any one of values of 3.6 mm, 5 mm, 10 mm, 12 mm and 15 mm, or a value between any two of the values.

[0161] In some embodiments, a cross-sectional shape of the cooling segment 102 may be a regular shape or an irregular shape by taking a plane perpendicular to the axial direction Z as a cross section, and the irregular shape is a special-shaped structure except the regular shape.

[0162] In some embodiments, the cooling segment 102 is arranged at an end of the segment 101 along the axial direction Z, and a cross-sectional shape of the cooling segment 102 is a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to the axial direction Z as a cross section. The cooling segment 102 may also have another regular shape such as a pentagonal shape, etc.

[0163] In some embodiments, a cross-sectional shape of the filter segment 103 is a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to the axial direction Z as a cross section. The filter segment 103 may also have another regular shape such as a pentagonal shape, etc.

[0164] In some embodiments, the cross-sectional shape of the cooling segment 102 may be an irregular shape such as a vortex shape, a snowflake shape or the like, by taking the plane perpendicular to the axial direction Z as a cross section.

[0165] In some embodiments, the cross-sectional shape of the filter segment 103 may be an irregular shape such as a vortex shape, a snowflake shape or the like, by taking the plane perpendicular to the axial direction Z as a cross section. The cross-sectional shape of the filter segment 103 may be the same as or different from that of the cooling segment 102.

[0166] In some embodiments, each of the filter segment 103 and the cooling segment 102 includes a base material and an adhesive component, and the base material is in form of powders.

[0167] Here, the adhesive component is configured to bond the base material in form of powders. The adhesive component bonds the base material as an integral body, forming main structure of each of the filter segment 103 and the cooling segment 102. Each of the filter segment 103 and the cooling segment 102 is made of a mixed material formed of the base material and the adhesive component, which has at least one characteristic such as good strength, good cooling effect, less interception of tobacco smoke, easy addition of spices, etc.

[0168] The base material in form of powders and the adhesive component are bonded to form a particle bonding body, with micropores between particles of the particle bonding body. For example, sizes of the micropore such as an area of a flowing cross section, a length or the like are naturally formed by components of the material, and the components of the material expand to a certain extent to form the micropores. The aerosols may flow through the micropores.

[0169] The micropore described in the disclosure is different from the air channel 11, the micropore is disordered. "disordered" means that it is difficult to generate the micropore in an orderly manner according to design, that is, the micropore is randomly generated. The air channel 11 is ordered, that is, it is formed mainly by design and processing, and has predictability. The air channel 11 described in the disclosure belongs to a hole or groove in a macroscopic sense, the micropore belongs to a hole in a microscopic sense, and sizes of the air channel 11 such as an area of a flowing cross section, a length or the like are much greater than those of the micropore. The air channel 11 is formed mainly by design and processing, and exemplarily, the air channel 11 is formed by processing with a mold. Therefore, sizes of the air channel 11 such as the cross-sectional area of the flowing cross section, the length or the like may be changed according to design requirements; however, the size of the micropore is determined by gaps between the particles. For example, the base material is in form of particles, each of the cooling segment 102 and the filter segment 103 molded by extruding from the material is provided with micropores, sizes of the micropore such as the area of the flowing cross section, the length or the like are naturally formed by the extrusion process and components of the material, and the material flows out of mouth of the mold and then expands to a certain extent to form the micropores.

[0170] The base material may include one or more organic materials, and the base material may also include one or more inorganic materials.

[0171] In some embodiments, the base material includes at least one of plant cellulose, microcrystalline cellulose, calcium carbonate, or silicon dioxide.

[0172] Exemplarily, the base material includes one of plant cellulose, microcrystalline cellulose, calcium carbonate, and silicon dioxide.

[0173] Exemplarily, the base material includes multiple of plant cellulose, microcrystalline cellulose, calcium carbonate, and silicon dioxide.

[0174] In this embodiment, materials such as plant cellulose, microcrystalline cellulose, calcium carbonate, silicon dioxide or the like are not easily stuck into a lump when they are in contact with water, and the materials have characteristics such as low cost, easy to obtain, etc.

[0175] In some embodiments, a proportion of the base material in the cooling segment 102 is 10% to 80%, and a proportion of the base material in the filter segment 103 is 10% to 80%.

[0176] Preferably, the proportion of the base material in the cooling segment 102 is 15% to 80%.

[0177] Preferably, the proportion of the base material in the filter segment 103 is 15% to 80%.

[0178] Exemplarily, the proportion of the base material in the cooling segment 102 is any one of values of 10%, 15%, 50% and 80%, or a value between any two of the values.

[0179] Exemplarily, the proportion of the base material in the filter segment 103 is any one of values of 10%, 15%, 50% and 80%, or a value between any two of the values.

[0180] In this embodiment, the proportion of the base material in the cooling segment 102 is 10% to 80%, and the base material forms a skeleton body of the cooling segment 102 and has characteristics of good strength. The proportion of the base material in the filter segment 103 is 10% to 80%, and the base material forms a skeleton body of the filter segment 103 and has characteristics of good strength.

[0181] In some embodiments, the adhesive component includes at least one of starch, cellulose, kudzu extraction, protein, gelatin, polylactic acid (PLA), or polyethylene terephthalate (PET).

[0182] Exemplarily, the adhesive component includes one of starch, cellulose, kudzu extraction, protein, gelatin, PLA, and PET.

[0183] Exemplarily, the adhesive component includes multiple of starch, cellulose, kudzu extraction, protein, gelatin, PLA, and PET.

[0184] The protein may be gluten protein.

[0185] In this embodiment, materials such as starch, cellulose, kudzu extraction, protein, gelatin, PLA, PET or the like have low cost; cellulose, kudzu extraction, gluten protein and gelatin may be viscous when they are in contact with water; PLA and PET may be melted at a high temperature.

[0186] In some embodiments, a proportion of the adhesive component in the cooling segment 102 is 5% to 80%, and a proportion of the adhesive component in the filter segment 103 is 5% to 80%.

[0187] Exemplarily, the proportion of the adhesive component in the cooling segment 102 is any one of values of 5%, 50% and 80%, or a value between any two of the values.

[0188] Exemplarily, the proportion of the adhesive component in the filter segment 103 is any one of values of 5%, 50% and 80%, or a value between any two of the values.

[0189] In this embodiment, the proportion of the adhesive component in the cooling segment 102 is 5% to 80%, then the base material may be adhered such that the base material in form of powders and the adhesive component are mixed into slurry in form of fluid, thereby facilitating forming a specific shape of cooling segment 102 by extrusion or die-casting. The proportion of the adhesive component in the filter segment 103 is 5% to 80%, then the base material may be adhered such that the base material in form of powders and the adhesive component are mixed into slurry in form of fluid, thereby facilitating forming a specific shape of filter segment 103 by extrusion or die-casting.

[0190] In some embodiments, each of the filter segment 103 and the cooling segment 102 includes a liquid component, a proportion of the liquid component in the cooling segment 102 is 0% to 50%, and a proportion of the liquid component in the filter segment 103 is 0% to 50%.

[0191] The proportion of the liquid component in each of the filter segment 103 and the cooling segment 102 is 0%, that is, there may be no liquid component in each of the filter segment 103 and the cooling segment 102.

[0192] The proportion of the liquid component in the cooling segment 102 is any one of values of 5%, 50% and 80%, or a value between any two of the values.

[0193] Preferably, the cooling segment 102 includes 3% to 8% of aqueous liquid.

[0194] The cooling segment 102 includes 0% to 50% of other liquids besides the aqueous liquid.

[0195] The proportion of the liquid component in the filter segment 103 is any one of values of 5%, 50% and 80%, or a value between any two of the values.

[0196] Preferably, the filter segment 103 includes 3% to 8% of aqueous liquid.

[0197] The filter segment 103 includes 0% to 50% of other liquids besides the aqueous liquid.

[0198] In this embodiment, the liquid component includes water and other liquids. The liquid component may be used in cooperation with the adhesive component; cellulose, kudzu extraction, gluten protein, gelatin or the like may be viscous when they are in contact with water, at least one of the cooling segment 102 or the filter segment 103 may have water, for example, PLA and PET may be melted at a high temperature, and at least one of the cooling segment 102 or the filter segment 103 may have no water.

[0199] In some embodiments, the cooling segment 102 includes perfumes and spices. In case that the cooling segment 102 needs to provide a fragrance substance, the perfumes and spices may be added to the cooling segment 102. In a process of heating the substrate segment 101 to generate aerosols, heat of the aerosols is absorbed by the perfumes and spices in the cooling segment 102, and the perfumes and spices are stimulated to emit the fragrance substance, such that the cooling segment 102 releases the supplementary fragrance substance, which may not only increase fragrance of the aerosols, but also achieve an effect of further reducing temperature of the aerosols. It is unnecessary to punch side holes in the wrapping layer 104 to access to the cooling segment 102, that is, it is unnecessary to punch side holes in the wrapping layer 104 corresponding to the cooling segment 102, to introduce external air to cool the aerosols.

[0200] In some embodiments, a proportion of the perfumes and spices in the cooling segment 102 is 0.5% to 10%. In this way, the perfumes and spices may release an appropriate amount of fragrance substance to meet fragrance requirements.

[0201] In other embodiments, it is unnecessary to supplement the cooling segment 102 with the fragrance substance, then the cooling segment 102 may also have no perfumes and spices.

[0202] In some embodiments, the filter segment 103 includes perfumes and spices. In case that the filter segment 103 needs to provide a fragrance substance, the perfumes and spices may be added to the filter segment 103. In a process of heating the substrate segment 101 to generate aerosols, heat of the aerosols is absorbed by the perfumes and spices in the filter segment 103, and the perfumes and spices are stimulated to emit the fragrance substance, such that the filter segment 103 releases the supplementary fragrance substance, which may not only increase fragrance of the aerosols, but also achieve an effect of further reducing temperature of the aerosols. It is unnecessary to punch side holes in the wrapping layer 104 to access to the filter segment 103, that is, it is unnecessary to punch side holes in the wrapping layer 104 corresponding to the filter segment 103, to introduce external air to cool the aerosols.

[0203] In some embodiments, a proportion of the perfumes and spices in the filter segment 103 is 0.5% to 10%. In this way, the perfumes and spices may release an appropriate amount of fragrance substance to meet fragrance requirements.

[0204] In other embodiments, it is unnecessary to supplement the filter segment 103 with the fragrance substance, then the filter segment 103 may also have no perfumes and spices.

[0205] In some embodiments, the perfumes and spices include terpene class, grape concentrates, peppermint perfumes, etc. The peppermint perfumes include but are not limited to menthol.

[0206] Exemplarily, an example of at least one of the cooling segment 102 or the filter segment 103 adopting the extrusion process is taken, the base material in form of powders, the adhesive component or the like may be proportionally fed to a shear type high-speed mixer to be mixed uniformly. In case that the liquid component needs to be added, the liquid component may be metered and fed in batches and mixed uniformly. The prepared slurry is fed into a screw extruder, where it is extruded through specially designed molds with different hole sizes and porosities. After drying, the extruded part is cut into different lengths of cooling segments 102 or filter segments 103, and finally, at least one of the cooling segment 102 or the filter segment 103 may be assembled into the aerosol generating article 100.

[0207] In some embodiments, the perfumes and spices may be added to at least one of the cooling segment 102 or the filter segment 103 by co-extrusion or externally adding them after molding the segment.

[0208] In some embodiments, the filter segment 103 has a structure formed by filling at least one of cellulose acetate, paper materials, porous silica gel, or paper tubes. Specifically, taking the cellulose acetate as an example, the cellulose acetate may be manufactured first, and then fill to form the filter segment 103.

[0209] The cellulose acetate has a structure formed by side-by-side arranging tows at intervals along a circumferential direction. Exemplarily, the cellulose acetate may be prepared into sheets, the sheets are folded and gathered together to form a cylindrical shape, and then the cylindrical shape is rolled and connected to form the structure by using a cigarette maker. The filter segment 103 may have a structure made of solid cellulose acetate, the solid cellulose acetate refers to having only gaps between tows, without designed and formed air channels 11. The filter segment 103 may have a structure made of hollow cellulose acetate, the hollow cellulose acetate refers to having both gaps between tows and designed and formed air channels 11.

[0210] In some embodiments, with reference to FIGS. 1 to FIG. 3, the substrate segment 101 includes at least one of a sheet substrate, a shredded substrate, or a granular substrate.

[0211] Thickness of the sheet substrate is less than its sizes along other directions, the sheet substrate may be further folded to form multiple strips parallel to the axial direction Z, or may be further cut and then gathered together to form strips parallel to the axial direction Z.

[0212] Exemplarily, the sheet substrate may be formed by using methods such as thick slurry, papermaking, tape casting, etc.

[0213] The shredded substrate is filamentous, and the shredded substrate may be formed by directly cutting leaves and / or stems of plants such as tobacco into shreds. Taking tobacco raw materials as an example, leaves of the tobacco may be cut into disordered filaments, and multiple filamentous structures are filled to the wrapping layer 104.

[0214] The granular substrate is in a dispersed state. Taking tobacco raw materials as an example, the tobacco raw materials may form particles by a granulation process, and then particle matrices are filled into the wrapping layer 104.

[0215] In this embodiment, each of the sheet substrate, the shredded substrate and the granular substrate has a substantially loose, non-integral structure.

[0216] In some embodiments, the substrate segment 101 may include one of the sheet substrate, the shredded substrate, and the granular substrate.

[0217] In some embodiments, the substrate segment 101 may include two of the sheet substrate, the shredded substrate, and the granular substrate. Exemplarily, the sheet substrate and the shredded substrate may be combined together to form the substrate segment 101. The sheet substrate and the granular substrate may be combined together to form the substrate segment 101. The shredded substrate and the granular substrate may be combined together to form the substrate segment 101.

[0218] In some embodiments, the substrate segment 101 may include three of the sheet substrate, the shredded substrate, and the granular substrate. That is, the sheet substrate, the shredded substrate and the granular substrate are combined together to form the substrate segment 101.

[0219] In some embodiments, with reference to FIG. 13, a cross-sectional shape of the cooling segment 102 is a circular shape, the cooling segment 102 is provided with multiple air holes 11a at interior thereof, and the multiple air holes 11a are distributed in a mesh shape.

[0220] In some embodiments, with reference to FIG. 5, the cross-sectional shape of the cooling segment 102 is a circular shape, the cooling segment 102 is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, the middle portion is provided with square-shaped air holes 11a, the edge portion is provided with irregular shapes of air holes 11a formed during extrusion.

[0221] In some embodiments, with reference to FIG. 16, the cross-sectional shape of the cooling segment 102 is a circular shape, the cooling segment 102 has a radial-shaped structure at interior thereof, a cross-sectional shape of an air hole 11a at the center of the cooling segment 102 is a circular shape, and cross-sectional shapes of other air holes 11a are irregular shapes.

[0222] In some embodiments, with reference to FIG. 17, the cross-sectional shape of the cooling segment 102 is a circular shape with grooves 11b in an outer circumferential surface thereof, a cross-sectional shape of each of the air holes 11a is a circular shape, and a cross-sectional shape of each of the grooves 11b is a semicircular shape.

[0223] The cooling segment 102 provided in the embodiment of the disclosure will be further described below with reference to specific embodiments.First specific embodiment

[0224] With reference to FIG. 13, the cross-sectional shape of the cooling segment 102 is a circular shape, the cooling segment 102 is provided with multiple air holes 11a at interior thereof, and the multiple air holes 11a are distributed in a mesh shape. The cross-sectional shape of the air hole 11a at the middle portion is a square shape, and the air hole 11a has a hydrodynamic diameter of 0.3 mm to 1.4 mm. The air hole 11a at the edge portion has an irregular shape naturally formed when the extrusion mold is used, and the air hole 11a has a cross-sectional area of 0.09 mm2 to 1.96 mm2.Second specific embodiment

[0225] With reference to FIG. 14, the cross-sectional shape of the cooling segment 102 is a square shape, the cooling segment 102 is provided with multiple air holes 11a regularly arranged at interior thereof, the cross-sectional shape of the air hole 11a is a triangular shape, and the air hole 11a has a hydrodynamic diameter of 0.5 mm to 1.2 mm.Third specific embodiment

[0226] With reference to FIG. 15, the cross-sectional shape of the cooling segment 102 is a hexagonal shape, the cooling segment 102 is provided with multiple air holes 11a regularly arranged at interior thereof, the cross-sectional shape of the air hole 11a is a circular shape, and the air hole 11a has a hydrodynamic diameter of 0.3 mm to 1.4 mm.Fourth specific embodiment

[0227] With reference to FIG. 16, the cooling segment 102 has a radial-shaped structure at interior thereof, the radial-shaped structure is naturally formed during extrusion according to a specific mold core design, an air hole 11a of which the cross-sectional shape is a circular shape is present at the center of the cooling segment 102, the circular shape of air hole 11a has a cross-sectional area of 0.1 mm2 to 0.4 mm2, and other irregular shapes of air holes 11a have a cross-sectional area of 0.1 mm2 to 0.4 mm2.Fifth specific embodiment

[0228] With reference to FIG. 17, the cross-sectional shape of the cooling segment 102 is a circular shape with grooves 11b in an outer circumferential surface thereof, the cross-sectional shape of the air hole 11a is a circular shape, and the air hole 11a has a cross-sectional area of 0.09 mm2 to 1.96 mm2. The cross-sectional shape of the groove 11b is a semicircular shape, and the groove 11b has a radius of 0.1 mm to 0. 6 mm.Sixth specific embodiment

[0229] With reference to FIG. 19, the cross-sectional shape of the cooling segment 102 is a square shape with grooves 11b in an outer circumferential surface thereof, the cross-sectional shape of the air hole 11a is a circular shape, and the air hole 11a has a cross-sectional area of 0.12 mm2 to 1.80 mm2. The cross-sectional shape of the groove 11b is a trapezoidal shape, an upper base of the groove 11b is 0.2 mm to 0. 5 mm, a lower base of the groove 11b is 0.1 mm to 0. 4 mm, and a height of the groove 11b is 0.02 mm to 0. 1 mm.Seventh specific embodiment

[0230] With reference to FIG. 20, the cross-sectional shape of the cooling segment 102 is a regular hexagonal shape with grooves 11b in an outer circumferential surface thereof, the cross-sectional shape of the air hole 11a is a square shape, and the air hole 11a has a cross-sectional area of 0.10 mm2 to 1.90 mm2. The cross-sectional shape of the groove 11b is a regular triangular shape, and a side of the groove 11b has a length of 0.5 mm to 1 mm.

[0231] The aerosol generating article 100 provided in the embodiment of the disclosure will be further described below with reference to specific embodiments.Eighth specific embodiment

[0232] With reference to FIG. 1, the aerosol generating article 100 includes a substrate segment 101, a cooling segment 102 and a filter segment 103 sequentially arranged along the axial direction Z, the cooling segment 102 is formed into an integral structure and is formed with air holes 11a, and the cross-sectional shape of the air hole 11a of the cooling segment 102 is a square shape.

[0233] There is no gap between the cooling segment 102 and the substrate segment 101, that is, the cooling segment 102 is in contact with the substrate segment 101. There is no gap between the cooling segment 102 and the filter segment 103, that is, the cooling segment 102 is in contact with the filter segment 103. The substrate segment 101 has a length of 10 mm to 40 mm along the axial direction Z, and each segment has a diameter of 3.6 mm to 10 mm

[0234] The substrate segment 101 is a sheet substrate.

[0235] The cooling segment 102 may be formed by an extrusion process or a die-casting process. The cooling segment 102 contains perfumes and spices.

[0236] The filter segment 103 may have a structure made of solid cellulose acetate.

[0237] In this specific embodiment, the cooling segment 102 may achieve balance between temperature reduction and interception. The smoking resistance of the substrate segment 101 is greater than the smoking resistance of the filter segment 103, and the smoking resistance of the filter segment 103 is greater than the smoking resistance of the cooling segment 102, such that a fragrance-adding effect of the cooling segment 102 may be enhanced, and a role of the cooling segment 102 in adding fragrance may be highlighted. During heating, air enters the substrate segment 101 and takes the aerosols out, the aerosols are cooled by the cooling segment 102 to form aerosols at a suitable temperature. The cooling segment 102 receives heat of the aerosols, and perfumes and spices in the cooling segment 102 release fragrance substances, the fragrance substances may be heated and released during smoking, and mixed with main components of the aerosols, to obtain aerosols with harmonious fragrance. Large particles may be filtered from the aerosols passing through the filter segment 103, structural stability of the filter segment 103 may be maintained, achieving a good smoking effect. Since the substrate segment 101 is a sheet substrate, the substrate segment 101 has a low thermal conduction efficiency, and an amount of released aerosols is not large; however, an advantage of low interception of the cooling segment 102 may significantly increase the amount of aerosols.

[0238] In other embodiments, there may be a gap between the cooling segment 102 and the filter segment 103.

[0239] In other embodiments, the filter segment 103 may also have a structure made of hollow cellulose acetate.Ninth specific embodiment

[0240] With reference to FIG. 3, the aerosol generating article 100 includes a substrate segment 101, a cooling segment 102 and a filter segment 103 sequentially arranged along the axial direction Z, each of the cooling segment 102 and the filter segment 103 is formed into an integral structure and is formed with air holes 11a, and the cross-sectional shape of the air hole 11a of the cooling segment 102 is a square shape. The cooling segment 102 is in contact with the substrate segment 101. The cooling segment 102 is in contact with the filter segment 103. The substrate segment 101 has a length of 10 mm to 40 mm along the axial direction Z, and each segment has a diameter of 3.6 mm to 10 mm. The substrate segment 101 is a filamentous substrate.

[0241] In this specific embodiment, the cooling segment 102 may achieve balance between temperature reduction and interception. The smoking resistance of the substrate segment 101 is greater than the smoking resistance of the cooling segment 102, and the smoking resistance of the cooling segment 102 is greater than the smoking resistance of the filter segment 103, such that a filtration effect of the filter segment 103 and a fragrance-adding effect of the cooling segment 102 may be enhanced, and a role of the cooling segment 102 in adding fragrance may be highlighted. During heating, air enters the substrate segment 101 and takes the aerosols out, the aerosols are cooled by the cooling segment 102 to form aerosols at a suitable temperature. The cooling segment 102 receives heat of the aerosols, and perfumes and spices in the cooling segment 102 release fragrance substances, the fragrance substances may be heated and released during smoking, and mixed with main components of the aerosols, to obtain aerosols with harmonious fragrance. Compared to a non-integral filter segment 103, the filter segment 103 formed into an integral structure and

[0242] provided with air holes 11a may effectively reduce interception and achieve a better smoking effect. Since the substrate segment 101 is a sheet substrate, the substrate segment 101 has a low thermal conduction efficiency, and an amount of released aerosols is not large; however, an advantage of low interception of the filter segment 103 and the cooling segment 102 may significantly increase the amount of aerosols. The filter segment 103 formed into an integral structure and provided with air holes 11a may also effectively adjust the smoking resistance and control particle sizes of aerosols through material and structural design.

[0243] In descriptions of the disclosure, descriptions made with reference to terms "in an embodiment", "in some embodiments", "in some other embodiments", "in still other embodiments", "exemplarily" or the like mean that specific features, structures, materials or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of the embodiments of the disclosure. In the disclosure, schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. Furthermore, those skilled in the art may combine different embodiments or examples described in the disclosure and features of different embodiments or examples without conflicting with each other.

[0244] The above descriptions are only preferred embodiments of the disclosure, and are not intended to limit the disclosure, and various modifications and variations may be made to the disclosure by those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the disclosure should be included within the scope of protection of the disclosure.

Claims

1. An aerosol generating article, comprising:a substrate segment;a cooling segment, arranged at an end of the segment, formed into an integral structure, and formed with at least one air channel passing through at least one end of the cooling segment; anda filter segment, arranged at an end of the cooling segment away from the substrate segment.

2. The aerosol generating article of claim 1, wherein the cooling segment is arranged at an end of the segment along an axial direction, and a cross-sectional shape of the cooling segment is a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to the axial direction as a cross section.

3. The aerosol generating article of claim 1, wherein the cooling segment has a length of 3 mm to 50 mm along an axial direction.

4. The aerosol generating article of claim 1, wherein the cooling segment has a shrinkage rate of 0% to 15% after usage of the aerosol generating article.

5. The aerosol generating article of claim 1, wherein the filter segment is formed into an integral structure, and the filter segment is formed with air channels passing through at least one end of the filter segment.

6. The aerosol generating article of claim 5, wherein a cross-sectional shape of the filter segment is a circular shape, an elliptical shape, a racetrack shape, a quadrilateral shape or a hexagonal shape, by taking a plane perpendicular to an axial direction as a cross section.

7. The aerosol generating article of claim 5, wherein the filter segment has a length of 3 mm to 8 mm along an axial direction.

8. The aerosol generating article of claim 5, wherein each of the air channels of the filter segment has a cross-sectional area of 0.94 mm2to 1.2 mm2.

9. The aerosol generating article of claim 5, wherein the filter segment has a porosity of 50% to 70%.

10. The aerosol generating article of claim 5, wherein the filter segment has a shrinkage rate of 0% to 15% after usage of the aerosol generating article.

11. The aerosol generating article of claim 5, wherein the air channels comprise air holes arranged inside the filter segment, and the filter segment is provided with the air holes with at least two cross-sectional shapes.

12. The aerosol generating article of claim 1, wherein the at least one air channel comprises a single air channel or a plurality of air channels, and comprises air holes arranged inside the cooling segment.

13. The aerosol generating article of claim 12, wherein the cooling segment is provided with the air holes with at least two cross-sectional shapes.

14. The aerosol generating article of claim 1, wherein the at least one air channel comprises a single air channel or a plurality of air channels, and comprises grooves arranged in an outer circumferential surface of the cooling segment.

15. The aerosol generating article of claim 1, wherein each of the filter segment and the cooling segment comprises a base material and an adhesive component, and the base material is in form of powders.

16. The aerosol generating article of claim 15, wherein the base material comprises at least one of plant cellulose, microcrystalline cellulose, calcium carbonate, or silicon dioxide; and the adhesive component comprises at least one of starch, cellulose, kudzu extraction, protein, gelatin, polylactic acid (PLA), or polyethylene terephthalate (PET).

17. The aerosol generating article of claim 15, wherein each of the filter segment and the cooling segment comprises a liquid component, a proportion of the liquid component in the cooling segment is 0% to 50%, and a proportion of the liquid component in the filter segment is 0% to 50%.

18. The aerosol generating article of claim 1, wherein the filter segment has a structure formed by filling at least one of cellulose acetate, paper materials, porous silica gel, or paper tubes.

19. The aerosol generating article of claim 1, wherein a cross-sectional shape of the cooling segment is a circular shape, the cooling segment is provided with a plurality of air holes at interior thereof, and the plurality of air holes are distributed in a mesh shape; orthe cross-sectional shape of the cooling segment is a circular shape, the cooling segment is divided into a middle portion and an edge portion surrounding the middle portion, the middle portion is provided with square-shaped air holes, the edge portion is provided with irregular shapes of air holes formed during extrusion; orthe cross-sectional shape of the cooling segment is a circular shape, the cooling segment has a radial-shaped structure at interior thereof, a cross-sectional shape of an air hole at the center of the cooling segment is a circular shape, and cross-sectional shapes of other air holes are irregular shapes; orthe cross-sectional shape of the cooling segment is a circular shape with grooves in an outer circumferential surface thereof, a cross-sectional shape of each of the air holes is a circular shape, and a cross-sectional shape of each of the grooves is a semicircular shape.

20. The aerosol generating article of claim 1, wherein the substrate segment comprises at least one of a sheet substrate, a shredded substrate, or a granular substrate.

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