A filter segment and aerosol-generating article

Abstract

The embodiment of the application discloses a filter segment and an aerosol generating article, wherein the filter segment is an integral structure, and the filter segment is provided with at least one airflow channel, and two ends of the airflow channel respectively penetrate through opposite two ends of the filter segment in the axial direction. The filter segment of the embodiment of the application is beneficial to reducing the investment amount of production equipment, simplifying the production process, improving the production efficiency, and reducing the production cost; meanwhile, the filter segment is also convenient to improve, so as to improve the problems that the aerosol generating article is single in flavor, insufficient in flavor concentration, insufficient in filtering degree of harmful substances, and improper in suction resistance.

Description

Technical Field

[0001] This application relates to the field of smoke-generating products, and in particular to a filter section and an aerosol-generating product. Background Technology

[0002] Smoke-generating articles include aerosol-generating articles that form aerosols by ignition or heating without combustion. Aerosol-generating articles include a filtration section and a matrix section; the matrix section is used to generate aerosols, and the filtration section is used to filter the aerosols.

[0003] In related technologies, to more efficiently reduce harm and tar, the synergistic effect of different materials and structures is required; to improve the inhalation experience, flavoring or adding flavoring capsules to the filter section is necessary; to improve the concentration and agglomeration of aerosols, sub-segments of different materials or structures need to be combined to form the filter section. However, to achieve these functions, additional production equipment corresponding to the required functions and composite filter rod machines integrating them are needed, resulting in high equipment investment, numerous production processes, low production efficiency, and high production costs. Furthermore, in related technologies, when adding flavoring substances to the filter section, the flavoring substances need to be mixed with a solvent before the solvent is added to the filter section. Since the proportion of flavoring substances in the solvent is already low, the amount of solvent added to the filter section is also quite limited, ultimately leading to an even lower proportion of flavoring substances added to the filter section. Therefore, adding flavoring substances is difficult and limited, resulting in a single flavor, insufficient flavor concentration, and inadequate filtration of harmful substances, making it difficult to satisfy consumers. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a filter section and an aerosol generating product, which are intended to reduce the investment in production equipment, simplify production processes, improve production efficiency, and reduce production costs; at the same time, it also facilitates the improvement of the filter section to address the problems of single fragrance, insufficient fragrance concentration, insufficient filtration of harmful substances, and unsuitable suction resistance in the aerosol generating product.

[0005] To solve the above problems, the technical solution of this application embodiment is implemented as follows:

[0006] This application provides a filter section for use in aerosol generation products. The filter section is an integral structure and has at least one airflow channel. The two ends of the airflow channel pass through opposite ends of the filter section along its axial direction.

[0007] In some embodiments, the slurry for preparing the filtration section includes a substrate and auxiliary materials, the substrate including filter materials, and the auxiliary materials including harm-reducing and tar-reducing materials and / or flavoring substances.

[0008] In some embodiments, the fragrance substance includes at least one of solid fragrance powder and liquid fragrance.

[0009] In some embodiments, the solid fragrance powder accounts for 10% to 50% by weight in the prepared slurry; and / or,

[0010] The liquid flavoring and fragrance constitute 2% to 20% of the weight of the prepared slurry.

[0011] In some embodiments, the harm-reducing and coke-reducing material includes at least one of activated carbon, zeolite, and molecular sieve; and / or,

[0012] The substrate includes at least one of cellulose, filler, and adhesive.

[0013] In some embodiments, the harm-reducing and coke-reducing material accounts for 10% to 50% by weight in the prepared slurry.

[0014] In some embodiments, the filter section is cut with a plane perpendicular to the filter section to obtain a reference cross section. On the reference cross section, the sum of the cross-sectional areas of each airflow channel is a first area, and the area of ​​the region formed around the outer perimeter of the reference cross section is a second area. The first area accounts for 10% to 80% of the second area.

[0015] In some embodiments, there are multiple airflow channels, and at least some of the airflow channels have different cross-sectional areas.

[0016] In some embodiments, the number of airflow channels is multiple, and the filter section is cut off with a plane perpendicular to the filter section to obtain a reference cross section;

[0017] Each of the airflow channels is arranged in a radial pattern on the reference cross section; or, each of the airflow channels is arranged in a matrix pattern on the reference cross section.

[0018] In some embodiments, the cross-sectional shape of the airflow channel includes at least one of a circle, an ellipse, a regular polygon, and a racetrack shape.

[0019] In some embodiments, the number of airflow channels is no less than nine.

[0020] In some embodiments, the filter section is an extruded structure, a blow-molded structure, a cast structure, an injection-molded structure, or a die-casting structure; and / or,

[0021] The axial dimension of the filter section is 10mm to 60mm.

[0022] This application also provides an aerosol generating article, comprising:

[0023] The matrix segment is used to generate aerosols;

[0024] The filter segment described in any of the above embodiments is located near the lip end of the matrix segment.

[0025] In some embodiments, the aerosol-generating article further includes an encapsulation layer that encapsulates the peripheral sidewalls of the matrix section and the peripheral sidewalls of the filter section; and / or,

[0026] The matrix segment is an ignition-type matrix segment.

[0027] In this embodiment of the application, the filter section, being a single-piece structure, eliminates the need for the materials used to achieve various functions of the filter section to be separately molded into substructures and then integrated together using a composite filter rod machine. Instead, it can be integrally molded using, for example, an integral molding device by changing the slurry preparation formula. This eliminates the need for equipment for preparing each substructure and a composite filter rod machine, requiring only an integral molding device. This reduces equipment investment and lowers production costs. Furthermore, the filter section avoids the need to first mold multiple substructures and then integrate them, simplifying the production process and improving production efficiency.

[0028] The filtration section is formed into an integrated structure by preparing a slurry. For example, flavoring substances and / or harm-reducing and tar-reducing materials can be directly mixed with the filter material to form the slurry. This eliminates the need for intermediate media (such as solvents in related technologies) to add flavoring substances and / or harm-reducing and tar-reducing materials within the filtration section, thereby increasing the amount of these materials added. This facilitates improvements to the filtration section to address issues such as a single flavor profile, insufficient flavor concentration, and inadequate filtration of harmful substances in aerosol-generated products.

[0029] Furthermore, by setting airflow channels that run through both ends of the filter section along its axial direction, aerosols can flow through the filter section via these channels. By changing the number of airflow channels and the cross-sectional area of ​​the channels, it is convenient to adjust the ventilation rate and suction resistance of the filter section, thereby improving the problem of unsuitable suction resistance and enhancing the user's suction experience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the filter segment in the first embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the filter segment in the second embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of the filter segment according to the third embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the structure of an aerosol generating article according to an embodiment of this application; wherein, the filtration section is... Figure 1 The filtering segment of the embodiment shown.

[0034] Explanation of reference numerals in the attached figures

[0035] 10. Filter section; 10a. Airflow channel; 20. Matrix section. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore only examples, and should not be used to limit the scope of protection of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0042] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0043] This application provides an aerosol-generating product; please refer to [link / reference]. Figures 1 to 4 The aerosol-generating article includes a matrix section 20 and a filter section 10 according to any embodiment of this application.

[0044] It should be noted that the aerosol generating product can be an ignition-type aerosol generating product or a heating-but-non-combustion-type aerosol generating product, and this application does not impose any restrictions here.

[0045] It should be noted that when the aerosol generating article adopts the filter section 10 of any embodiment of this application, the aerosol generating article has all the advantages of the filter section 10 of that embodiment, and the specific advantages are described in detail below.

[0046] The matrix segment 20 is used to generate aerosols. Exemplarily, the matrix segment 20 is prepared from ingredients such as tobacco.

[0047] In some embodiments, the matrix segment 20 is an ignition-type matrix segment, which is applied to an ignition-type aerosol generating article. Based on the ignition-type aerosol generating article, when in use, the matrix segment 20 is ignited, and components such as tobacco generate aerosols through combustion.

[0048] The filter section 10 is located near the lip end of the matrix section 20. The two ends of the aerosol generating product along its axis are the near-lip end and the far-lip end, respectively. The near-lip end refers to the end of the aerosol generating product that is close to the user's lips when the user uses it, and the far-lip end refers to the end of the aerosol generating product that is far from the user's lips when the user uses it.

[0049] Filter section 10 is used to filter aerosols.

[0050] The filtering functions of filter section 10 include, but are not limited to, the following four:

[0051] The first method involves using the fibrous material in the filter section 10 to physically intercept and adsorb tar particles, thereby reducing the amount inhaled and nicotine intake. The filter section 10 can reduce the nicotine content in aerosols to a certain extent, thus reducing the risk of addiction and harm to the body.

[0052] The second type: Filter section 10 can filter out other harmful substances: such as carbon monoxide, benzo[a]pyrene and other harmful substances, reducing the chance of them entering the human body and reducing damage to the respiratory system, cardiovascular system and so on.

[0053] The third type: Filter section 10 can improve the inhalation taste and experience, and can adjust the concentration of aerosol. For example, filter section 10 can dilute and buffer the aerosol to a certain extent when it passes through, making the aerosol feel softer and finer to the user, without being too strong or irritating, and making the inhalation process more comfortable.

[0054] Fourthly, filter section 10 can reduce odors. For example, filter section 10 can adsorb and remove some odor substances in the aerosol, making the taste of the aerosol inhaled purer and improving the taste of the aerosol.

[0055] In related technologies, filtration sections commonly employ cellulose acetate filter rods, polylactic acid cellulose filter rods, or composite filter rods combining cellulose acetate and polylactic acid cellulose with other functional materials (activated carbon particles, fragrance particles, fragrance threads, flavoring beads, etc.). During development, to more efficiently reduce harm and tar, synergistic effects of different materials and structures are needed; to improve the inhalation experience, flavoring or flavoring beads are added to the filtration section; to improve aerosol concentration and agglomeration, sub-segments of different materials or structures are combined to form the filtration section. However, achieving these functions requires additional production equipment corresponding to the desired functions and composite filter rod machines that integrate them, resulting in high equipment investment, numerous production processes, low production efficiency, and high production costs. Furthermore, due to limitations in the production process of composite filter sections, when adding flavoring substances to the composite filter section, the flavoring substances need to be mixed with a solvent before the solvent is added to the filtration section. Because the proportion of fragrance substances in the solvent is already low, and the amount of solvent added in the filtration section is also quite limited, the proportion of fragrance substances added in the filtration section is even lower. Therefore, it is difficult to add fragrance substances and the fragrance is limited. The fragrance is monotonous and the fragrance concentration is insufficient. The degree of filtration of harmful substances is insufficient, which makes it difficult to satisfy consumers.

[0056] In view of this, embodiments of this application provide a filter section that is applied to aerosol-generating products.

[0057] Please see Figures 1 to 3 The filter section 10 is an integral structure.

[0058] "Integrated structure" refers to a continuous material body formed between the components of filter section 10 through a manufacturing process, whose structural integrity does not depend on fastening or connecting parts assembled later. For example, materials used to prepare filter section 10 are mixed to form a preparation slurry, and the preparation slurry is used to produce filter section 10 through an integrated molding equipment.

[0059] The slurry can be prepared from biodegradable materials through production processes such as extrusion, blow molding, casting, injection molding, and die casting. That is, the filter section 10 can be an extrusion molding structure, a blow molding structure, a casting molding structure, an injection molding structure, or a die casting structure.

[0060] Preferably, the filter section 10 is an extrusion molding structure or a casting molding structure.

[0061] More preferably, the filter section 10 is an extrusion molding structure. Extrusion molding involves forcing the prepared slurry through a die orifice for continuous molding. The slurry is continuously extruded through the die orifice to form a continuously extending long strip filter section, which is then slit to obtain the filter section 10 of the required size. The extrusion process allows for continuous production, eliminating the need for frequent equipment start-ups and shutdowns. The equipment is simple, energy consumption is low, and die costs are low. Furthermore, die orifice replacement is convenient, and the cross-sectional shape of the filter section can be changed by adjusting the die orifice design.

[0062] The filter section 10 is a cast-molded structure. During the production process, the casting equipment has a wider compatibility with materials and is suitable for filter sections 10 with multiple materials or complex structures.

[0063] In some embodiments, the slurry for preparing the filter section 10 includes a substrate and auxiliary materials, the substrate including filter material.

[0064] The substrate is used to achieve the filtration function of the filter section 10.

[0065] The specific material of the substrate is not limited. For example, the substrate includes at least one of cellulose, filler, and adhesive.

[0066] Cellulose can physically intercept and adsorb tar particles, causing some of them to adhere to the filter section 10, thus reducing the amount inhaled and nicotine intake. The filter section 10 can reduce the nicotine content in aerosols to a certain extent, thereby reducing the risk of addiction and harm to the body.

[0067] The filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, attapulgite, talc, and diatomaceous earth.

[0068] Fillers can provide a skeletal support for auxiliary materials.

[0069] In addition, the packing material has micropores, which can increase the porosity of the filter section 10. On the one hand, this facilitates the passage of aerosols through the filter section 10; on the other hand, the increased porosity also increases the specific surface area of ​​the filter section 10, thus making it easier to load more auxiliary materials.

[0070] Adhesives achieve their binding effect by wetting and tightly contacting the component raw materials at the interface, generating intermolecular attraction. This allows them to adhere to the components, such as powders and liquids. Adhesives can be one or more combinations of natural plant extracts and non-ionic modified viscous polysaccharides, including tamarind polysaccharides, guar gum, and modified cellulose (such as carboxymethyl cellulose). Adhesives are used to bind particles together, preventing them from easily falling apart. Furthermore, they improve the water resistance of filter section 10 and are harmless to humans.

[0071] Auxiliary materials include harmful and tar-reducing materials and / or flavoring substances.

[0072] Here, the auxiliary materials may include only harm-reducing and tar-reducing materials; or only aroma substances; or both harm-reducing and tar-reducing materials and aroma substances.

[0073] It is understandable that the substrate and auxiliary materials are mixed to form a slurry, and then the filtration section 10 is integrally formed by an integral molding equipment.

[0074] Since the filter section 10 in this embodiment is a one-piece structure, the materials used to realize the various functions of the filter section 10 do not need to be separately molded into substructures and then integrated together using a composite filter rod machine. Instead, they can be integrally molded by changing the slurry preparation formula, for example, using an integral molding equipment. In this way, there is no need to configure equipment for preparing each substructure, nor is there a need to configure a composite filter rod machine. Only an integral molding equipment is needed, which helps to reduce the amount of equipment investment and reduce production costs. At the same time, since the filter section 10 does not need to be separately molded into various substructures and then integrated together, it also helps to simplify the production process and improve production efficiency.

[0075] The filtration section 10 is formed into an integral structure by preparing a slurry. For example, flavoring substances and / or harm-reducing and tar-reducing materials can be directly mixed with the filter material to form the slurry. This eliminates the need for intermediate media (such as solvents in related technologies) to add flavoring substances and / or harm-reducing and tar-reducing materials within the filtration section 10, thereby increasing the amount of these materials added. Therefore, the filtration section 10 of this embodiment is easier to modify in terms of its constituent materials, thus helping to address issues such as a single flavor profile, insufficient flavor concentration, and inadequate filtration of harmful substances in aerosol-generated products.

[0076] The filter section 10 is provided with at least one airflow channel 10a, and the two ends of the airflow channel 10a pass through the opposite ends of the filter section 10 in the axial direction.

[0077] In this way, the aerosol can flow through the airflow channel 10a through the filter section 10. By changing the number of airflow channels 10a and the cross-sectional area of ​​the channel, it is convenient to adjust the ventilation rate and suction resistance of the filter section 10 to improve the problem of unsuitable suction resistance and improve the user's suction experience.

[0078] In some embodiments, the fragrance substance includes at least one of solid fragrance powder and liquid fragrance.

[0079] Solid fragrance powder has better reducing properties and higher stability, making it less prone to volatilization. In other words, using solid fragrance powder as the flavoring agent helps to stably preserve the flavoring agent in the filter section 10. During the use of aerosol-generated products, the fragrance is better preserved, thus ensuring a better inhalation experience for the user.

[0080] Furthermore, due to its better stability, the solid fragrance powder can be set to a larger weight proportion in the preparation of the slurry, which is conducive to expanding the range of the amount of fragrance substances added to the filter section 10, and making it easier for the filter section 10 to be adapted to more types of aerosol generation products.

[0081] Understandably, during the production process of filter section 10, the integral molding equipment, such as an extrusion equipment, continuously extrudes the prepared slurry to form a continuously extending long strip filter section. The long strip filter section is then cut to obtain the filter section 10 of the required size. If the density and hardness of the prepared slurry are too high, the extrusion equipment will have difficulty extruding it, resulting in a long strip filter section with a high density and hardness. When the cutting equipment cuts the long strip filter section, it is easy for it to break, thus affecting the yield of filter section 10.

[0082] Furthermore, when liquid fragrances are used as flavoring agents, their addition to the prepared slurry helps to reduce the density and hardness of the prepared slurry, thus facilitating the extrusion equipment to extrude the prepared slurry. It also helps to improve the yield of the filtration section 10.

[0083] Liquid flavorings and fragrances are more volatile, allowing for better release during the inhalation of aerosol-generated products, thus rapidly increasing the aroma concentration of the aerosol. This means users can inhale a higher concentration of aroma from the very beginning, improving the overall inhalation experience.

[0084] In some embodiments, the solid fragrance powder accounts for 10% to 50% by weight in the preparation of the slurry. For example, it is 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, etc.

[0085] In this embodiment, the weight percentage of solid fragrance powder is appropriate. On the one hand, the weight percentage of solid fragrance powder is not too small, which helps to ensure the amount of fragrance substances loaded on the filter section 10, thereby helping to ensure the fragrance concentration of the aerosol-generated product during the suction process. On the other hand, if the fragrance substances in the filter section 10 are not used up after the matrix section 20 is used up during the suction process, it will result in the waste of fragrance substances. By reasonably controlling the maximum amount of solid fragrance powder added, it is beneficial to reduce the waste of fragrance substances, thereby helping to control the user's usage costs.

[0086] Preferably, the solid fragrance powder accounts for 15% to 40% of the weight in the preparation of the slurry.

[0087] More preferably, the solid fragrance powder accounts for 20% to 35% of the weight in the preparation of the slurry.

[0088] In some embodiments, the liquid fragrance and flavoring constitute 2% to 20% of the weight of the prepared slurry. For example, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.

[0089] In this embodiment, the weight percentage of liquid flavoring is appropriate. On the one hand, the sufficient weight percentage of liquid flavoring in the prepared slurry helps to reduce the density and hardness of the prepared slurry, thereby facilitating the formation of the filter section 10 and improving the yield of the filter section 10. At the same time, adding no less than 2% by weight of liquid flavoring allows the user to release the fragrance quickly during aerosol inhalation due to its good volatility. This helps to rapidly increase the fragrance concentration of the aerosol and improve the inhalation experience. On the other hand, since liquid flavoring is volatile and evaporates quickly at higher concentrations, adding no more than 20% by weight of liquid flavoring helps to slow down the evaporation rate of the liquid flavoring and reduce the waste of flavoring substances.

[0090] Preferably, the liquid flavoring and fragrance constitute 3% to 15% of the weight of the prepared slurry.

[0091] More preferably, the liquid flavoring and fragrance constitute 5% to 10% of the weight of the prepared slurry.

[0092] In some embodiments, the harm-reducing and coke-reducing materials include at least one of activated carbon, zeolite, and molecular sieve.

[0093] Activated carbon has a high specific surface area, enabling it to efficiently adsorb large molecular harmful substances such as tar, volatile organic compounds (VOCs), and polycyclic aromatic hydrocarbons (PAHs) from aerosols. Furthermore, it can rapidly adsorb non-polar or weakly polar molecules (such as benzene and toluene), reducing their impact on tobacco flavor. In addition, activated carbon is relatively inexpensive and industrially mature, thus helping to control the production cost of filter section 10.

[0094] The microporous structure and acidic sites on the surface of zeolites can efficiently adsorb polar harmful gases (such as ammonia, formaldehyde, and hydrogen cyanide) through cation exchange (such as Na+). + K + Zeolites can catalyze the breakdown of large molecular toxins (such as nitrosamines) at acidic sites, converting them into less harmful substances. Furthermore, zeolites can regulate aerosol humidity, which helps improve the smoking experience.

[0095] Molecular sieves possess relatively uniform pore sizes, allowing them to selectively adsorb specific molecules (such as nicotine and acrolein) while retaining smaller molecules like oxygen. As catalyst carriers, molecular sieves facilitate the oxidation of CO to CO2 or the decomposition of potent carcinogens like nitrosamines (TSNAs). Furthermore, molecular sieves are heat-resistant and chemically stable, making them suitable for complex aerosol extraction environments. Their ability to precisely sieve and catalyze aerosols facilitates customized harm reduction.

[0096] In some embodiments, the weight percentage of the harm-reducing and tar-reducing materials in the prepared slurry is 10% to 50%. For example, it is 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, etc.

[0097] In this embodiment, the weight ratio of the harm-reducing and coking-reducing materials in the prepared slurry is appropriate. On the one hand, the proportion of the harm-reducing and coking-reducing materials in the produced filter section 10 will not be too small, which is beneficial to ensuring the harm-reducing and coking-reducing function of the filter section 10; on the other hand, the weight ratio of the harm-reducing and coking-reducing materials in the prepared slurry will not be too large, thereby reducing the probability of clogging of the micropores of the harm-reducing and coking-reducing materials themselves due to excessive material accumulation, which is beneficial to ensuring the effective specific surface area of ​​the filter section 10, and also helps to control the production cost of the filter section 10.

[0098] Preferably, the weight percentage of the harm-reducing and coke-reducing materials in the preparation of the slurry is 15% to 40%.

[0099] More preferably, the weight percentage of the harm-reducing and coking-reducing materials in the preparation of the slurry is 20% to 35%.

[0100] It should be noted that the ability to release aroma substances and the ability to reduce harm and tar are mainly determined by the formulation of the slurry and the specific surface area of ​​the filtration section 10.

[0101] In some embodiments, please refer to Figures 1 to 3 The number of airflow channels 10a shall not be less than 9. For example, there may be 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, etc.

[0102] It is understandable that, with the cross-sectional dimensions of the filter section 10 remaining unchanged, compared to using only one airflow channel 10a and increasing the diameter of the airflow channel 10a to increase the specific surface area of ​​the filter section 10, in this embodiment, increasing the number of airflow channels 10a to increase the specific surface area of ​​the filter section 10 can increase the specific surface area of ​​the filter section 10 to a greater extent.

[0103] Furthermore, the diameter of the airflow channel 10a does not need to be set too large, so that the cross-sectional area and number of the airflow channels 10a can be coordinated while ensuring the specific surface area of ​​the filter section 10. This facilitates the improvement of the suction and cavitation problems caused by the excessively large cross-sectional area of ​​the airflow channel 10a, or the excessive suction resistance caused by the excessively small cross-sectional area of ​​the airflow channel 10a.

[0104] It should be noted that the cross-section of filter section 10 refers to the section perpendicular to its axial direction on the transition section.

[0105] Preferably, the number of airflow channels 10a is not less than 16.

[0106] More preferably, the number of airflow channels 10a is not less than 25.

[0107] It should be noted that the shape of the flow channel cross-section of the airflow channel 10a is not limited.

[0108] For example, the shape of the flow channel cross section of the airflow channel 10a includes at least one of a circle, an ellipse, a regular polygon, and a runway shape.

[0109] Among them, the track shape refers to a shape similar to an athletic track, which is formed by two semicircles of the same radius and two parallel straight sides connected alternately.

[0110] It should be noted that the flow channel cross section of the airflow channel 10a refers to the cross section of the airflow channel 10a perpendicular to its axis.

[0111] In this embodiment, the cross-sectional shape of the airflow channel 10a is relatively regular, which facilitates manufacturing and molding. At the same time, the relatively regular shape of the airflow channel 10a allows the aerosol to flow uniformly along the wall of the airflow channel 10a, thereby reducing the probability of turbulence and vortex problems, which is beneficial to improving the aerosol extraction efficiency. In addition, the pressure drop is relatively small, which is beneficial to reducing suction resistance.

[0112] Furthermore, when the filter section 10 is subjected to circumferential stress, the more regularly shaped airflow channel 10a allows for a more uniform distribution of stress along its circumference. Some stresses can cancel each other out, enabling the filter section 10 to withstand higher internal / external pressures. This, in turn, improves the structural strength and deformation resistance of the filter section 10.

[0113] In some embodiments, the filter section 10 is cut with a plane perpendicular to the filter section 10 to obtain a reference cross section. On the reference cross section, the sum of the cross-sectional areas of each airflow channel 10a is the first area, and the area of ​​the region formed around the outer perimeter of the reference cross section is the second area. The proportion of the first area to the second area is 10% to 80%. For example, it is 10%, 11%, 13%, 15%, 17%, 19%, 20%, 22%, 24%, 26%, 28%, 30%, 31%, 33%, 35%, 37%, 39%, 40%, 42%, 44%, 46%, 48%, 50%, 51%, 53%, 55%, 57%, 59%, 60%, 62%, 64%, 66%, 68%, 70%, 71%, 73%, 75%, 77%, 79%, 80%, etc.

[0114] It is understandable that the ratio of the first area to the second area is related to the specific surface area of ​​the filter section 10; the larger the ratio, the larger the specific surface area of ​​the filter section 10.

[0115] In this embodiment, the ratio of the first area to the second area is appropriate and reasonable. On the one hand, the filter section 10 has a sufficient specific surface area, which is conducive to ensuring the release capacity of aroma substances and the ability to reduce harm and tar. On the other hand, the specific surface area is not too large, which is conducive to ensuring the structural strength of the filter section 10 and reducing the probability of breakage. At the same time, it also makes the filter section 10 have a certain suction resistance to improve the problem of suction and cavitation.

[0116] Preferably, the first area accounts for 20% to 70% of the second area.

[0117] More preferably, the first area accounts for 30% to 60% of the second area.

[0118] In some embodiments, please refer to Figures 1 to 3There are multiple airflow channels 10a, and the filter section 10 is cut off with a plane perpendicular to the filter section 10 to obtain a reference cross section.

[0119] Please see Figure 1 Each airflow channel 10a is distributed in a matrix on the reference cross section.

[0120] Matrix distribution refers to setting multiple trajectory lines on a reference section, with each trajectory line arranged at intervals along the direction that intersects (or is orthogonal) its extension direction, and multiple airflow channels 10a are distributed at the center of each trajectory line.

[0121] With the area of ​​the reference cross section remaining constant, each airflow channel 10a is distributed in a matrix on the reference cross section, which is beneficial for setting up more airflow channels 10a and facilitating a further increase in the specific surface area of ​​the filter section 10.

[0122] Please see Figure 2 Each airflow channel 10a is distributed in a radial pattern on the reference cross section.

[0123] The radial distribution refers to setting a center on a reference section and setting multiple concentric circles of different diameters around this center, with multiple airflow channels 10a distributed around the circumference of each circle.

[0124] Here, in the radial direction of the filter section 10, the connection structure between two adjacent circumferences is close to annular connecting ribs. When the annular connecting ribs are subjected to stress, the stress can be distributed more evenly to all parts of the circumference of the annular connecting ribs. Therefore, the filter section 10 has better resistance to deformation and higher structural strength.

[0125] In some embodiments, please refer to Figure 3 There are multiple airflow channels 10a, and at least some of the airflow channels 10a have different cross-sectional areas.

[0126] In this way, setting up some airflow channels 10a with a larger cross-sectional area facilitates the passage of aerosols, thereby reducing the suction resistance of the filter section 10; setting up some airflow channels 10a with a smaller cross-sectional area helps to ensure the overall specific surface area of ​​the filter section 10, which is conducive to the filter section 10 better releasing aroma substances and exerting the functions of reducing harm and tar.

[0127] In some embodiments, the axial dimension of the filter section 10 is 10mm to 60mm. For example, it is 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, etc.

[0128] In this embodiment, the axial dimension of the filter section 10 is suitable. On the one hand, the filter section 10 has sufficient axial dimension, which is beneficial to ensuring its filtration effect on aerosols. At the same time, it is also convenient for the filter section 10 to load a sufficient amount of aroma substances and harm-reducing and tar-reducing materials. On the other hand, the axial length of the filter section 10 is not too long, which helps to improve the problem of reduced aerosol quantity and large suction resistance caused by excessive aerosol interception by the filter section 10.

[0129] In some embodiments, the aerosol generating article further includes an encapsulation layer that encapsulates the peripheral sidewalls of the matrix section 20 and the peripheral sidewalls of the filter section 10.

[0130] There are no restrictions on the type of wrapping layer. For example, it can be tipping paper, wrapping paper, etc.

[0131] In the production process of aerosol-generated products, for example, tipping paper is used, and the filter section 10 and the matrix section 20 are combined together using a splicing device. This helps to improve the stability and reliability of the connection between the filter section 10 and the matrix section 20.

[0132] The coating layer can cover a portion of the outer wall of the filter section 10, thereby reducing the area of ​​the filter section 10 exposed to the external environment. This helps to reduce the amount of fragrance substances volatilized.

[0133] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filter section applied to aerosol-generating products, characterized in that, The filter section is an integral structure, and the filter section is provided with at least one airflow channel, with the two ends of the airflow channel passing through the opposite ends of the filter section along its axial direction.

2. The filter section according to claim 1, characterized in that, The slurry for preparing the filtration section includes a substrate and auxiliary materials. The substrate includes filter materials, and the auxiliary materials include harm-reducing and tar-reducing materials and / or flavoring substances.

3. The filter section according to claim 2, characterized in that, The aroma substance includes at least one of solid fragrance powder and liquid fragrance.

4. The filter section according to claim 3, characterized in that, The solid fragrance powder accounts for 10% to 50% by weight in the prepared slurry; and / or, The liquid flavoring and fragrance constitute 2% to 20% of the weight of the prepared slurry.

5. The filter section according to claim 2, characterized in that, The harm-reducing and tar-reducing materials include at least one of activated carbon, zeolite, and molecular sieves; and / or, The substrate includes at least one of cellulose, filler, and adhesive.

6. The filter section according to claim 2, characterized in that, The harm-reducing and tar-reducing materials account for 10% to 50% of the weight of the prepared slurry.

7. The filter section according to any one of claims 1-6, characterized in that, The filter section is cut with a plane perpendicular to the filter section to obtain a reference cross section. On the reference cross section, the sum of the cross-sectional areas of each airflow channel is the first area, and the area of ​​the region formed around the outer perimeter of the reference cross section is the second area. The first area accounts for 10% to 80% of the second area.

8. The filter section according to any one of claims 1-6, characterized in that, The number of airflow channels is multiple, and at least some of the airflow channels have different cross-sectional areas.

9. The filter section according to any one of claims 1-6, characterized in that, The number of airflow channels is multiple, and the filter section is cut off with a plane perpendicular to the filter section to obtain a reference cross section; Each of the airflow channels is arranged in a radial pattern on the reference cross section; or, each of the airflow channels is arranged in a matrix pattern on the reference cross section.

10. The filter section according to any one of claims 1-6, characterized in that, The cross-sectional shape of the airflow channel includes at least one of the following: circular, elliptical, regular polygonal, and racetrack-shaped.

11. The filter section according to any one of claims 1-6, characterized in that, The number of airflow channels is no less than nine.

12. The filter section according to any one of claims 1-6, characterized in that, The filter section is an extrusion molding structure, a blow molding structure, a casting molding structure, an injection molding structure, or a die-casting molding structure; and / or, The axial dimension of the filter section is 10mm to 60mm.

13. An aerosol-generating product, characterized in that, include: The matrix segment is used to generate aerosols; The filter segment according to any one of claims 1-12 is located near the lip end of the matrix segment.

14. The aerosol-generating article according to claim 13, characterized in that, The aerosol-generating article further includes an encapsulation layer that encapsulates the peripheral sidewalls of the matrix section and the peripheral sidewalls of the filter section; and / or, The matrix segment is an ignition-type matrix segment.

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