A filter and an aerosol-generating article

Abstract

The embodiment of the present application provides a filter and an aerosol generating article, the filter comprising one or more base filter segments and one or more functional material segments arranged along the axial direction of the filter, and each of the functional material segments is an integral structure. The filter of the embodiment of the present application forms a composite filter, basic filtration is performed by using the base filter segments, and other functions in addition to basic filtration are realized by using the functional material segments, so that the filtration efficiency of the aerosol can be met, and the functional diversification is also beneficial. In addition, since the base filter segments and the functional material segments are arranged in the axial direction, the filter has sectional differences in the axial direction, which is beneficial to the hierarchical treatment of the aerosol in the axial direction and is beneficial to improving the consistency of the taste when the aerosol enters the oral cavity of a user.

Description

Technical Field

[0001] This application relates to the field of atomized aerosol technology, and more particularly to a filter tip and an aerosol generating article. Background Technology

[0002] In related technologies, a cellulose acetate filter tip is provided near the lip end of the aerosol generating product. The cellulose acetate filter tip is used to filter aerosols, but it is difficult for the cellulose acetate filter tip to achieve diversified functions. Summary of the Invention

[0003] In view of this, the present application aims to provide a filter tip and aerosol generating article that can not only satisfy the function of filtering aerosols, but also facilitate the diversification of filter tip functions.

[0004] This application provides a filter tip for aerosol generation, comprising one or more basic filter sections arranged along the axial direction of the filter tip, and one or more functional material sections, wherein each functional material section is an integral structure.

[0005] In some implementations, the basic filtration section is used to filter aerosols, and the functional material section is used to selectively adsorb target components in the aerosols flowing through the filter tip, and / or release functional substances.

[0006] In some embodiments, at least one of the functional material segments includes a porous framework material and a functional substance, the functional substance being attached to the porous framework material to enable the functional material segment to release the functional substance in a controlled manner.

[0007] In some implementations, the number of the basic filter sections is at least two, and the one or more functional material sections are located between the two basic filter sections;

[0008] Alternatively, the number of the functional material segments is at least two, and the one or more basic filter segments are located between the two functional material segments.

[0009] In some embodiments, the carrier and / or the porous framework material is selected from one or more of the following: polysaccharides, amino acids, bioactive peptides, and supramolecular materials.

[0010] In some implementations, the functional substance includes at least a fragrance substance.

[0011] In some embodiments, the length of the filter tip in the axial direction is 15mm-40mm.

[0012] In some embodiments, the ratio of the total length of the one or more functional material segments in the axial direction to the total length of the filter tip is not less than 20%; and / or, the ratio of the total length of the one or more basic filter segments in the axial direction to the total length of the filter tip does not exceed 80%.

[0013] In some embodiments, the functional material segment is provided with at least one air passage hole that penetrates the end faces of opposite ends of the functional material segment in the axial direction.

[0014] In some embodiments, the ratio of the total area of ​​the at least one airway hole to the cross-sectional area of ​​the functional material segment is 0.05 to 0.9.

[0015] In some implementations, the base filter section is selected from one or more of cellulose acetate and PLA paper fibers.

[0016] In some embodiments, the filter tip includes a first sheath that wraps around the outer periphery of the base filter section and the functional material section, the base filter section and the functional material section being rolled together by the first sheath.

[0017] This application provides an aerosol generating article, comprising:

[0018] The matrix segment is used to generate aerosols;

[0019] And the filter tip described in any embodiment of this application, wherein the filter tip is disposed near the lip end of the matrix segment.

[0020] In some embodiments, the aerosol-generating article includes a second cladding layer that covers at least the junction of the matrix segment and the filter tip, the matrix segment and the filter tip being rolled together by the second cladding layer.

[0021] In some implementations, the matrix segment is a combustible matrix segment.

[0022] The filter tip of this application embodiment is a composite filter tip formed by a basic filtration section and a functional material section. The basic filtration section performs basic filtration, meaning that the filtration function of the filter tip is mainly performed by the basic filtration section. The functional material section is used to achieve other functions beyond basic filtration, such as selective adsorption of aerosols and fragrance carrying. This combination of the basic filtration section and the functional material section satisfies both the filtration efficiency for aerosols and facilitates functional diversification. Furthermore, since the basic filtration section and the functional material section are arranged axially, the filter tip has segmented differences in the axial direction, which is beneficial for graded treatment of aerosols in the axial direction and improves the consistency of taste when the aerosol enters the user's mouth. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the filter tip according to the first embodiment of this application;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0025] Figure 3 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0026] Figure 4 For along Figure 3 A schematic diagram showing a section view at position AA, rotated by an angle.

[0027] Figure 5 This is a schematic diagram of the filter tip according to the second embodiment of this application;

[0028] Figure 6 for Figure 5 A schematic diagram of the structure shown from another perspective;

[0029] Figure 7 for Figure 6 A schematic diagram of the structure shown from another perspective;

[0030] Figure 8 for Figure 5 Another perspective illustration;

[0031] Figure 9 For along Figure 8 A cross-sectional view of the BB position in the diagram;

[0032] Figure 10 This is a schematic diagram of the filter tip according to the third embodiment of this application;

[0033] Figure 11 for Figure 10 A schematic diagram of the assembled structure from another perspective;

[0034] Figure 12 For along Figure 11 A cross-sectional view at position CC;

[0035] Figure 13 This is a schematic diagram of an aerosol-generated article according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures

[0037] 10. Matrix section; 20. Filter tip; 21. Basic filtration section; 22. Functional material section; 22'. First functional material section; 22”. Second functional material section; 22a. Airway pore; 23. First coating. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0040] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0041] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0042] This application provides a filter 20 for use in aerosol generation articles, that is, the filter 20 is a component of the aerosol generation articles.

[0043] Please see Figure 13 This application also provides an aerosol generating article, including a matrix segment 10 and a filter 20 according to any embodiment of this application. The filter 20 is disposed near the lip end of the matrix segment 10.

[0044] The term "proximal lip end" refers to the direction of the aerosol. When a user inhales the aerosol, the end closer to the user's mouth is the proximal lip end, and the end farther away from the user's mouth is the distal lip end.

[0045] The matrix segment 10 is used to generate aerosols. For example, the matrix segment 10 releases aerosols when heated.

[0046] In some embodiments, the matrix segment 10 can be an integral structure, and the matrix segment 10 can maintain its predetermined shape and structural strength after molding.

[0047] In other embodiments, the matrix segment 10 includes a dispersed atomizing medium. A dispersed atomizing medium refers to numerous scattered atomizing media aggregated together by constraints from other structures. The dispersed atomizing medium itself cannot maintain a predetermined shape and structural strength and requires the assistance of other structures (e.g., forming paper) to maintain its predetermined shape. For example, the atomizing medium can be a filamentous structure, a sheet-like structure, a granular structure, or a porous solid structure.

[0048] In some embodiments, the matrix segment 10 is a combustible matrix segment, that is, the matrix segment 10 can be ignited and does not need to be used in conjunction with an aerosol generating device. It can be ignited directly, for example, it can be ignited and inhaled directly like a traditional cigarette.

[0049] The substrate section 10 and the filter nozzle 20 can be arranged adjacent to each other, or other functional sections, such as support sections, can be provided between the substrate section 10 and the filter nozzle 20, without any restrictions.

[0050] The filter tip 20 is used to filter the aerosol generated by the matrix section 10.

[0051] Please see Figures 1 to 12 The filter tip 20 includes one or more basic filter sections 21 arranged along the axial direction of the filter tip 20 (i.e., the number of basic filter sections 21 is at least one) and one or more functional material sections 22 (i.e., the number of functional material sections 22 is at least one).

[0052] In other words, the filter nozzle of this application embodiment is a composite filter nozzle formed by the basic filtration section 21 and the functional material section 22.

[0053] In this embodiment of the application, "multiple" refers to no less than two, such as two, three or more.

[0054] In this embodiment, the axial direction of the filter tip 20 can be understood as: the direction from the proximal lip end to the distal lip end of the filter tip 20, or the direction from the distal lip end to the proximal lip end of the filter tip 20.

[0055] Specifically, the filter tip 20 and the matrix section 10 are arranged along the aforementioned axial direction.

[0056] It should be noted that when there is only one basic filter segment 21, the number of functional material segments 22 can be one or more. The functional material segments 22 can all be located near the lip end of the basic filter segment 21, or all of them can be located at the distal lip end of the basic filter segment 21, or one basic filter segment 21 can be located between two adjacent functional material segments 22.

[0057] When there is one functional material segment 22, the number of basic filter segments 21 can be one or more. The basic filter segments 21 can all be located near the lip of the functional material segment 22, or all of them can be located at the distal lip of the functional material segment 22, or one functional material segment 22 can be located between two adjacent basic filter segments 21.

[0058] For example, in some embodiments, the number of basic filter sections 21 is at least two, and one or more functional material sections 22 (i.e., all functional material sections) are located between the two basic filter sections 21. Thus, one basic filter section 21 near the lip acts as a supplementary filter, and one basic filter section 21 at the distal lip acts as a primary filter. Furthermore, the axial length of the basic filter section 21 at the distal lip is greater than the length of the basic filter section 21 near the lip.

[0059] In other embodiments, the number of functional material segments 22 is at least two, and one or more basic filter segments 21 (i.e., all basic filter segments) are located between the two functional material segments 22. In this embodiment, the functional material segments 22 near the lip and those far from the lip can be differentiated to achieve different functions. For example, the functional material segments 22 near the lip can carry fragrance substances, which enter the user's oral cavity with the aerosol and are not trapped by the basic filter segments 21.

[0060] The basic filtration section 21 is used to filter aerosols. For example, the micropores of the basic filtration section 21 are used to filter solid particles (e.g., tar, nicotine, soot, metal oxide particles, and other particles) in the aerosol in a non-discriminatory (non-selective) manner. The micropore size of the basic filtration section 21 is used to maintain a suitable pressure drop.

[0061] Each functional material segment 22 is an integral structure. The integral structure has better structural strength, which is beneficial to improving the overall structural strength of the filter 20, and also to the structural integrity of the functional material segment 22 in industrial production.

[0062] A one-piece structure refers to a structure formed in a single, essentially uniform process from a slurry, without the need for further folding, gathering, or other processes that alter its external shape. The resulting structure is a single, indivisible physical unit that can maintain its overall state without the aid of external components. It should be noted that the specific processing method for a one-piece structure is not limited; for example, it can be formed by extrusion molding, die molding, roll forming, freeze molding, spray drying, gelation molding, injection molding, die casting, or one-piece molding of composite materials.

[0063] The filter 20 of this embodiment forms a composite filter by a basic filtration section 21 and a functional material section 22. The basic filtration section 21 is used for basic filtration, meaning that the filtration function of the filter 20 is mainly performed by the basic filtration section 21. The functional material section 22 is used to realize other functions besides basic filtration, such as selective adsorption of aerosols and fragrance carrying function. The combination of the basic filtration section 21 and the functional material section 22 can not only meet the filtration efficiency of aerosols, but also facilitate the realization of functional diversification.

[0064] Furthermore, since the basic filtration section 21 and the functional material section 22 of the filter 20 in this embodiment are arranged in the axial direction, the filter 20 has segmented differences in the axial direction, which is beneficial for graded treatment of aerosols in the axial direction and for improving the consistency of taste when the aerosols enter the user's mouth.

[0065] It should be noted that micropores are formed in both the basic filter section 21 and the functional material section 22. These micropores are irregular and belong to the category of pores in a microscopic sense. They are determined by the molding process of the basic filter section 21 and the functional material section 22, rather than being artificially created using tools or molds. These micropores contribute to improving the air permeability and filtration efficiency of the filter tip 20.

[0066] In some embodiments, the base filter section 21 is selected from one or more of cellulose acetate and PLA paper fibers.

[0067] The functional material section 22 is used to: selectively adsorb target components in the aerosol flowing through the filter tip 20, and / or release functional substances.

[0068] At least one of the functions of the functional material segment 22 is different from the function of the basic filter segment 21.

[0069] Selective adsorption of target components in aerosols flowing through filter 20 refers to the selective adsorption of certain specific components in aerosols, such as water vapor, aldehydes, ketones, etc., while other components are rarely or not adsorbed at all.

[0070] The release of functional substances refers to the fact that the functional material segment 22 contains functional substances that can be released, that is, the functional substances detach from the functional material segment 22. When the aerosol flows through the functional material segment 22, the aerosol carries the functional substances to the user's oral cavity.

[0071] It should be noted that the same functional material segment 22 can selectively adsorb the target components in the aerosol flowing through the filter 20 without releasing functional substances; it can also release functional substances but cannot selectively adsorb the target components in the aerosol flowing through the filter 20; or it can both release functional substances and selectively adsorb the target components in the aerosol flowing through the filter 20.

[0072] In some embodiments, at least one functional material segment 22 includes a porous framework material and a functional substance. The functional substance is attached to the porous framework material to enable the functional material segment 22 to release the functional substance in a controlled manner. The porous framework material refers to a material with moderate structural strength, capable of maintaining its shape, and containing numerous pores in which the functional substance is distributed. When aerosol flows through the pores on the surface of the porous framework material exposed to the airflow path, the aerosol carries away some of the functional substance, exposing the functional substance in deeper pores. Thus, with increasing puff count, a controlled release effect on the functional substance is achieved. Furthermore, it ensures consistency in taste with each puff. In related technologies, the functional substance is mainly attached to the fiber surface of the filter tip. The first few puffs have a stronger taste as a large amount of functional substance is released. As the number of puffs increases, the taste becomes increasingly weak, resulting in poor consistency in taste with each puff.

[0073] In some embodiments, the functional material segment 22 includes a carrier, on which the functional substance is loaded to form a composite, which is then filled into a porous framework material. It should be noted that in this embodiment, the functional substance and the carrier may be bonded first, and then the composite may be filled into the porous framework material; alternatively, the composite may be filled into the porous framework material simultaneously with the bonding of the functional substance and the carrier; or the carrier may be filled into the porous framework material first, and then the functional material may be loaded onto the carrier.

[0074] The carrier has the following functions: it has a load-bearing capacity and can effectively adsorb, encapsulate or fix functional substances; it can release functional substances when airflow passes through, maintain the activity of functional substances during storage and use, and work in conjunction with the basic filter section without affecting the user's smoking experience.

[0075] In other embodiments, the functional material segment 22 includes a carrier on which the functional substance is loaded, and the carrier forms a porous framework material. That is, the carrier can both load the functional substance and form a porous framework material itself, thus possessing suitable structural strength.

[0076] In some embodiments, the porous framework material is selected from one or more of the following: polysaccharides, amino acids, bioactive peptides, and supramolecular materials.

[0077] Polysaccharides include, but are not limited to: cellulose, chitosan, alginate, starch, and dextran.

[0078] Amino acids and their derivatives can form porous framework materials through self-assembly, polymerization, or cross-linking with other molecules. Examples include, but are not limited to: single amino acid self-assembled porous materials, amino acid polymer porous frameworks, amino acid-metal coordination frameworks, amino acid-derived covalent organic frameworks, and amino acid-inorganic hybrid porous materials.

[0079] Bioactive peptides (including natural peptides, synthetic peptides, and biomimetic peptides) can form porous framework materials through self-assembly, template-assisted assembly, or cross-linking strategies. For example, bioactive peptides include, but are not limited to: self-assembled peptides, metal-coordinated peptide frameworks, covalently cross-linked peptide frameworks, template-constructed porous peptide materials, and biomineralized porous peptide materials.

[0080] Supramolecular structures can self-assemble into porous framework materials through non-covalent interactions (such as hydrogen bonding, π-π stacking, metal coordination, and host-guest recognition). Supramolecular porous framework materials include, but are not limited to: hydrogen-bonded organic frameworks (HOFs), macrocyclic molecular assembly frameworks (e.g., cyclodextrin porous materials, calixarene frameworks), and host-guest inclusion complexes (e.g., cucurbituril frameworks).

[0081] In some embodiments, the functional material includes at least a fragrance substance. That is, the functional material segment 22 can perform the function of carrying fragrance.

[0082] Fragrance substances include, but are not limited to, mint essence, lemon essence, blueberry essence, watermelon essence, etc.

[0083] The cross-sectional shape of the filter tip 20 is not limited, such as circular, polygonal, etc.

[0084] In some embodiments, the filter tip 20 has a circular cross-sectional shape, and its outer diameter d is 5mm to 8mm. That is, 5mm ≤ d ≤ 8mm. For example, 5mm, 5.5mm, 5.8mm, 6mm, 6.4mm, 7mm, 7.6mm, and 8mm. This range is suitable for the user to hold the end of the filter tip 20 away from the matrix segment 10 in their mouth.

[0085] The filter nozzle 20 can be cylindrical in shape, that is, the outer diameter of the filter nozzle 20 is set to be constant along the axial direction of the filter nozzle 20.

[0086] The filter tip 20 can also be stepped, with a step change in the outer diameter of the filter tip 20 along its axial direction.

[0087] The filter tip 20 can also be frustum-shaped, with its outer diameter continuously increasing along the axial direction toward the matrix section 10.

[0088] For example, the outer diameter of the filter tip 20 is 5.0 mm to 5.8 mm (which may be referred to as a fine filter tip 20). The outer diameter of the filter tip 20 may be 6.0 mm to 7.0 mm (which may be referred to as a medium filter tip 20). The outer diameter of the filter tip 20 may be 7.3 mm to 8.0 mm (which may be referred to as a conventional filter tip 20).

[0089] In some embodiments, please refer to Figure 13 The axial length L of the filter nozzle 20 is 15mm-40mm, i.e., 15mm≤L≤40mm. For example, 15mm, 18mm, 20mm, 24mm, 26mm, 30mm, 35mm, 40mm, etc. This length range is moderate, which can ensure the filtration effect of aerosols while avoiding the large amount of aerosols being trapped due to excessive length. In addition, it can also take into account a suitable suction resistance (under the same structure, the longer the length, the greater the suction resistance).

[0090] In some specific embodiments, the length of the filter tip 20 along the axial direction is 20–30 mm, i.e., 20 mm ≤ L ≤ 30 mm. This helps to further balance the filtration effect on aerosols and the suction resistance.

[0091] In some embodiments, the ratio of the total axial length of at least one functional material segment 22 (i.e., the sum of the lengths of all functional material segments 22) to the total length of the filter tip 20 is not less than 20%. In this embodiment, the length of the functional material segment 22 accounts for not less than 20%, the functional material segment 22 has good formability, and the material hardness and straightness indicators meet the requirements. In addition, it is relatively easy to meet the expected load requirements under low-cost conditions for easy loading of functional materials.

[0092] In some embodiments, the ratio of the total axial length of at least one basic filter segment 21 (i.e., the sum of the lengths of all basic filter segments 21) to the total length of the filter nozzle 20 does not exceed 80%. In this embodiment, the proportion of the basic filter segment 21 not exceeding 80% is beneficial to ensuring the release rate and efficiency of the functional substances in the functional material segment 22.

[0093] In some embodiments, please refer to Figure 4 , Figure 9 , Figure 12 The functional material section 22 is provided with at least one air passage 22a, which penetrates the end faces of the functional material section 22 at opposite ends in the axial direction. The air passage 22a helps to improve the air permeability of the first filter rod and reduce suction resistance.

[0094] A single airway opening 22a may extend in a straight line or in a curve, or a portion of the length of a single airway opening 22a may extend in a straight line and another portion may extend in a curve, etc., without any limitation.

[0095] In some embodiments, the ratio of the total area of ​​at least one airway hole 22a (i.e., the sum of the cross-sectional areas of all airway holes 22a) to the cross-sectional area of ​​the functional material segment 22 is 0.05 to 0.9, for example, 0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc. For example, if the area of ​​a single airway hole 22a is S1, the cross-sectional shape of the functional material segment 22 is circular with a diameter of R, and the number of airway holes 22a is N, then (N*S1) / (π*R) 2 =0.05~0.9.

[0096] A reasonable ratio between the total area of ​​the airway pores 22a and the cross-sectional area of ​​the functional material segment 22 is beneficial for the stable release of functional substances and for ensuring aerosol extraction efficiency. Furthermore, it facilitates the reception of appropriate airflow, ensuring relatively uniform release of functional substances and improving the consistency of each suction inlet. Specifically, if the total area of ​​the airway pores exceeds 0.9, resulting in an excessive number of airway pores, the functional material segment will be overloaded with airflow, leading to excessive extraction and release of functional substances during the initial heating process, which is detrimental to the consistent suction experience.

[0097] In some embodiments, the ratio of the total area of ​​at least one airway pore 22a (i.e., the sum of the cross-sectional areas of all airway pores 22a) to the cross-sectional area of ​​the functional material segment 22 is 0.1 to 0.4. This ratio range is more conducive to balancing aerosol extraction efficiency and filter structural strength. In some embodiments, the filter 20 includes a first cladding 23, which wraps around the outer periphery of the base filter segment 21 and the functional material segment 22, and the base filter segment 21 and the functional material segment 22 are wound together by the first cladding 23. For example, during the manufacturing process, the base filter segment 21 and the functional material segment 22 can be processed separately, and then the first cladding 23 can be used to wind the base filter segment 21 and the functional material segment 22, so that the filter segment 21 and the functional material segment 22 are connected into a whole.

[0098] In some embodiments, the aerosol-generated article includes a second cladding layer that covers at least the junction of the matrix segment 10 and the filter tip 20, with the matrix segment 10 and the filter tip 20 wound together by the second cladding layer. For example, during the manufacturing process, the matrix segment 10 and the filter tip 20 can be processed separately, and then the matrix segment 10 and the filter tip 20 can be wound together by the second cladding layer to form a whole.

[0099] The following is a brief description of three specific embodiments with reference to the accompanying drawings.

[0100] First Embodiment

[0101] Please see Figures 1 to 4 The filter 20 includes a functional material section 22 and a basic filter section 21.

[0102] The functional material segment 22 is loaded with fragrance substances. The functional material segment 22 is located near the lip end of the basic filter segment 21. In this way, the fragrance substances slowly released by the functional material segment 22 can enter the user's mouth with the aerosol. The fragrance substances will not flow through the basic filter segment 21 and will not be intercepted by the basic filter segment 21.

[0103] The length of filter tip 20 is 23mm.

[0104] The ratio of the length L2 of the functional material section 22 to the length L1 of the basic filter section 21 is 6:17, that is, L2:L1 = 6:17. In this way, the basic filter section 21 can have a relatively long length, thereby ensuring the filtration performance of the filter nozzle 20.

[0105] The functional material section 22 has multiple air passages 22a inside, and the multiple air passages 22a penetrate the end faces of opposite ends of the functional material section 22 along the axial direction.

[0106] The cross-sectional shape of the airway orifice 22a is elliptical.

[0107] The ratio of the total cross-sectional area of ​​all air passages 22a to the cross-sectional area of ​​the functional material segment 22 is 0.18.

[0108] Of course, the cross-sectional shape of the airway 22a can also be circular or other shapes.

[0109] Functional material segment 22 uses supramolecular cyclodextrin (a type of supramolecular material) as a carrier. Cellulose is used as a raw material to construct a porous framework material. The supramolecular cyclodextrin encapsulates flavor substances in a host-guest inclusion manner. During preparation, the supramolecular cyclodextrin, flavor substances, and cellulose are mixed together, and after molding, the desired structure is obtained. In other words, the combination of supramolecular cyclodextrin and flavor substances, and the formation of the porous framework material, can occur simultaneously, without a clear sequential order.

[0110] The functional material segment 22 is integrally formed by extrusion. For example, supramolecular cyclodextrin, flavoring substances and cellulose are mixed together to obtain a slurry, which is then extruded and formed by an extruder.

[0111] The functional material section 22 and the basic filter section 21 have the same cross-sectional shape, both being circular, and have the same outer diameter.

[0112] The basic filtration section 21 uses cellulose acetate.

[0113] The functional material section 22 and the basic filter section 21 are formed by rolling together the first cladding layer 23.

[0114] The first sheath 23 can be a shaped paper.

[0115] In this embodiment, the functional material segment 22 is prepared by adding fragrance substances during the molding process. The functional material segment 22 is prepared by in-situ composite, eliminating the need to spray fragrance substances after the functional material segment is formed. As a result, the fragrance substances in the functional material segment 22 are more evenly distributed. The use of porous framework materials for slow release of fragrance substances results in a better slow release effect.

[0116] Second Embodiment

[0117] Please see Figures 5 to 9 The filter 20 includes two functional material sections 22 and a basic filter section 21.

[0118] The two functional material segments 22 are the first functional material segment 22' and the second functional material segment 22', respectively. The basic filter segment 21 is located between the two functional material segments 22.

[0119] The first functional material segment 22' is located near the lip end of the basic filter segment 21, and the second functional material segment 22" is located at the distal lip end of the basic filter segment 21.

[0120] The length of filter tip 20 is 23mm.

[0121] The ratio of the total length of the two functional material segments 22 to the length of the basic filter segment 21 is 9:14. That is, (L21+L22):L1=9:14.

[0122] The two functional material sections 22 and the basic filter section 21 have the same cross-sectional shape, which is circular, and the outer diameter is the same.

[0123] The length L22 of the second functional material segment 22” is greater than the length L21 of the first functional material segment 22’.

[0124] The second functional material segment 22” uses calixarene and its derivatives to coordinate with metal ions to form a porous framework material, which can selectively adsorb substances such as CO and volatile aldehydes. Calcineurins and their derivatives belong to a type of supramolecular material.

[0125] Calixarenes are a class of macrocyclic compounds composed of phenol units linked by methylene bridges. They have a unique cavity structure and can selectively adsorb specific molecules or particles through various interactions (such as hydrophobic interactions, π-π stacking, hydrogen bonding, electrostatic interactions, etc.).

[0126] The second functional material section 22” can enhance filtration. The second functional material section 22” can be loaded with fragrance substances or not. When the second functional material section 22” is loaded with fragrance substances, the fragrance substances can enter the user's mouth with the aerosol, and the fragrance substances will not flow through the basic filtration section 21, nor will they be intercepted by the basic filtration section 21.

[0127] The second functional material segment 22” is integrally formed by mold.

[0128] The second functional material segment 22” has multiple air passages 22a formed. Please refer to [link / reference]. Figure 6 and Figure 7 The airway opening 22a is elliptical in shape. The ratio of the sum of the cross-sectional areas of all the airway openings 22a in the second functional material segment 22” to the cross-sectional area of ​​the second functional material 22” is 0.18.

[0129] The basic filtration section 21 uses cellulose acetate.

[0130] The first functional material segment 22' uses calixarene-graphene aerogel as a carrier to load fragrance substances, while the carrier itself forms a porous framework material.

[0131] The first functional material segment 22' is integrally molded through gelation.

[0132] Calicoarylene-graphene aerogels can absorb water vapor from aerosols, which helps to lower the temperature of the aerosols. After absorbing water vapor, the pH value may change, which may cause changes in the taste for users. However, the flavoring substances loaded on the aerosol can play a harmonizing role and improve the taste.

[0133] Please see Figure 5 , Figure 8 and Figure 9 The first functional material segment 22' has multiple airway holes 22a, and the airway holes 22a are hexagonal in shape. The ratio of the sum of the cross-sectional areas of all the airway holes 22a in the first functional material segment 22' to the cross-sectional area of ​​the first functional material segment 22' is 0.18.

[0134] Third Embodiment

[0135] Please see Figures 10 to 12 The filter tip 20 includes a functional material section 22 and two basic filter sections 21. The functional material section 22 is located between the two basic filter sections 21.

[0136] Functional material segment 22 is loaded with fragrance substances.

[0137] The length of filter tip 20 is 23mm.

[0138] The length of the functional material segment 22 is in a ratio of 5:18 to the total length of the two basic filter segments 21, that is, L2:(L11+L12)=5:18.

[0139] The material used in functional material segment 22 is: cucurbituril (a type of supramolecular) is grafted and copolymerized onto polyethersulfone, and then modified through cucurbituril ports to load some hydrophilic or hydrophobic molecules (the hydrophilic or hydrophobic properties are determined according to the properties of the solvent of the fragrance substance; for example, if the solvent of the fragrance substance is hydrophobic, then the cucurbituril ports are loaded with hydrophobic molecules).

[0140] Functional material segment 22 is an integral structure.

[0141] The functional material segment 22 has multiple air passages 22a, and the air passages 22a are in the shape of a four-pointed star.

[0142] The ratio of the sum of the cross-sectional areas of all the air passages 22a in the functional material segment 22 to the cross-sectional area of ​​the functional material segment 22 is 0.25.

[0143] The basic filtration section 21 uses cellulose acetate.

[0144] The functional material section 22 and the two basic filter sections 21 are formed by rolling together the first cladding layer 23.

[0145] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0146] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A filter tip for use in aerosol-generating products, characterized in that, It includes one or more basic filter sections arranged along the axial direction of the filter tip, and one or more functional material sections, at least one of the functional material sections being an integral structure.

2. The filter tip according to claim 1, characterized in that, The basic filtration section is used to filter aerosols, and the functional material section is used to selectively adsorb target components in the aerosols flowing through the filter nozzle, and / or release functional substances.

3. The filter tip according to claim 1, characterized in that, At least one of the functional material segments includes a porous framework material and a functional substance, the functional substance being attached to the porous framework material to enable the functional material segment to release the functional substance in a controlled manner.

4. The filter tip according to claim 2, characterized in that, The number of the basic filter sections is at least two, and the one or more functional material sections are located between the two basic filter sections; Alternatively, the number of the functional material segments is at least two, and the one or more basic filter segments are located between the two functional material segments.

5. The filter tip according to claim 3, characterized in that, The porous framework material is selected from one or more of the following: polysaccharides, amino acids, active peptides, and supramolecular materials.

6. The filter tip according to any one of claims 2-5, characterized in that, The functional substances include at least aroma substances.

7. The filter tip according to claim 1, characterized in that, The length of the filter tip in the axial direction is 15mm-40mm.

8. The filter tip according to claim 1, characterized in that, The ratio of the total length of the one or more functional material segments in the axial direction to the total length of the filter tip is not less than 20%; and / or, the ratio of the total length of the one or more basic filter segments in the axial direction to the total length of the filter tip does not exceed 80%.

9. The filter tip according to claim 1, characterized in that, The functional material segment is provided with at least one air passage hole, which penetrates the end faces of the functional material segment at opposite ends in the axial direction.

10. The filter tip according to claim 9, characterized in that, The ratio of the total area of ​​the at least one airway hole to the cross-sectional area of ​​the functional material segment is 0.05 to 0.

9.

11. The filter tip according to claim 1, characterized in that, The basic filter section is selected from one or more of the following: cellulose acetate and PLA paper fiber.

12. The filter tip according to claim 1, characterized in that, The filter tip includes a first cladding layer, which wraps around the outer periphery of the basic filter section and the functional material section, and the basic filter section and the functional material section are rolled together by the first cladding layer.

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

14. The aerosol-generating article according to claim 13, characterized in that, The aerosol-generated article includes a second coating layer, which covers at least the junction of the matrix segment and the filter tip, and the matrix segment and the filter tip are rolled together by the second coating layer.

15. The aerosol-generating article according to claim 13, characterized in that, The matrix segment is a combustible matrix segment.

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