Aerosol-generating article and method of making same

Abstract

The invention provides an aerosol generating product and a preparation method thereof, and relates to the technical field of aerosol generation. According to the aerosol generating product, the functional material is attached to the film forming material to prepare the functional membrane, the functional membrane is covered on the base material layer to prepare the wrapping piece, it is ensured that the functional membrane is in direct contact with the fuming part and / or can be heated by aerosol, the manufacturing work of the functional membrane and the manufacturing work of the fuming part can be carried out at the same time, the step of spraying fragrance and storing filaments is omitted, and the production efficiency is improved. The process is simplified and time is saved; according to the aerosol generating product, the functional materials are prepared into the solid gel-shaped functional membrane, more functional materials can be added, liquid seepage and liquid leakage are not prone to occurring at the normal temperature, the form and system are more stable, the functions of fragrance locking and slow release are achieved, the problem of fragrance attenuation can be solved, the shelf life is prolonged, liquid seepage and liquid leakage are prevented, and large-scale sample preparation is facilitated; the aerosol generating product is used for the particle type smoke cartridge, and the gram weight of the smoke cartridge can be conveniently controlled, so that the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and particularly to an aerosol generation article and a preparation method thereof. Background Art

[0002] The heat-not-burn technology bakes the cartridge at a low temperature environment, controls the heating temperature, and generates smoke without combustion, which can effectively reduce harmful substances such as tar generated by the combustion of traditional cigarettes. To meet the multi-flavor requirements of the cartridge, related technologies add flavorings to the smoke-generating part of the aerosol generation article. However, due to the limitation of the baking temperature, if the amount of flavoring added is too small, the characteristic aroma cannot be significantly stimulated; while if the amount of flavoring added is large, there is an easy problem of liquid leakage of the flavoring in the smoke-generating part of the cartridge, and the flavoring is easy to volatilize, which will cause rapid aroma attenuation and shorten the shelf life. Summary of the Invention

[0003] The purpose of the present application is to provide an aerosol generation article and a preparation method thereof, aiming to solve the problems of easy liquid leakage of the flavoring in the aerosol generation article, rapid aroma attenuation, and short shelf life.

[0004] To achieve the above purpose, the present application provides an aerosol generation article, including a wrapper wrapped around the outer peripheral surface of the aerosol generation article, and a smoke-generating part disposed in the wrapper; the wrapper includes a base material layer and a functional film attached to at least part of the inner surface of the base material layer, and the functional film includes a film-forming material and a functional material attached to the film-forming material; the functional film is in contact with the smoke-generating part, and / or, the functional film can be heated by the aerosol generated by the smoke-generating part to release the functional material.

[0005] In some embodiments, the functional film is disposed on the base material layer on the outer peripheral surface of the smoke-generating part.

[0006] In some embodiments, the aerosol generation article further includes a cooling section and a filter section disposed in the wrapper;

[0007] The functional film is disposed on the base material layer on the outer peripheral surface of at least one of the filter section, the cooling section, and the smoke-generating part.

[0008] In some embodiments, the functional film is disposed on the base material layer on the outer peripheral surfaces of the smoke-generating part and the filter section; the functional material of the functional film covering the outer peripheral surface of the smoke-generating part includes a smoke-generating agent, and the functional material of the functional film covering the outer peripheral surface of the filter section does not include a smoke-generating agent.

[0009] In some embodiments, the functional material in the functional film disposed on the outer peripheral surface of the smoke-generating part includes at least one of a smoke-generating agent, a flavoring, a sweetening agent, and a cooling agent;

[0010] The functional material in the functional membrane disposed on the outer peripheral surface of the filter segment includes at least one of essence, sweetener, and cooling agent.

[0011] In some embodiments, the base material layer includes a plurality of base material layers, and the plurality of base material layers include a first base material layer wrapped around the outer peripheral surface of the smoking section, a second base material layer wrapped around the outer peripheral surface of the filter segment, and a third base material layer joining the smoking section and the filter segment;

[0012] Function membranes are provided on portions of the first base material layer, the second base material layer, and the third base material layer that are located on the outer periphery of the temperature reduction section.

[0013] In some embodiments, the functional material of the functional membrane covering the first base material layer includes a smoking agent;

[0014] The functional material of the functional membrane covering the second base material layer includes at least one of essence, sweetener, and cooling agent;

[0015] The functional material of the functional membrane covering the third base material layer includes at least one of essence, sweetener, and cooling agent, and is different from the functional material covering the second base material layer.

[0016] In some embodiments, the functional membrane is in a solid state at room temperature; when the smoking section is heated to generate smoke, the functional membrane on the outer peripheral surface of the smoking section can be melted.

[0017] This application also provides a preparation method of an aerosol generating article for preparing the above aerosol generating article, including:

[0018] Preparing a functional membrane and attaching it to a base material to obtain a wrapped piece;

[0019] Wrapping the wrapped piece around the smoking section to obtain the aerosol generating article.

[0020] In some embodiments, the preparation method of the functional membrane includes:

[0021] Mixing a film-forming material in a molten state with a functional material to obtain a mixed solution;

[0022] Preparing the mixed solution into a film and drying it to obtain the functional membrane.

[0023] Compared with the related art, the beneficial effects of this application include:

[0024] The aerosol-generating article provided by the present application attaches a functional material to a film-forming material to form a functional film, and the functional film is laminated on a substrate layer to form a package, ensuring that the functional film is in direct contact with the smoke-generating part and / or can be heated by the aerosol. The production of the functional film and the production of the smoke-generating part can be carried out simultaneously, eliminating the step of perfume spraying and filament storage, simplifying the process and saving time. The aerosol-generating article of the present application prepares the functional material into a solid gel-like functional film, which can add more functional materials, is not prone to liquid leakage at room temperature, has a more stable form and system, and has the functions of fragrance locking and slow release, can improve the problem of fragrance attenuation, extend the shelf life, prevent liquid leakage, and is convenient for large-scale sample preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope of the present application.

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the aerosol-generating article of the present application;

[0027] Figure 2 It is a schematic cross-sectional view of the smoke-generating part of an embodiment of the aerosol-generating article of the present application;

[0028] Figure 3 It is a schematic plan view of the package after being unfolded of the present application;

[0029] Figure 4 It is a schematic three-dimensional structure diagram of the package of the present application;

[0030] Figure 5 It is a schematic structural diagram of another embodiment of the aerosol-generating article of the present application;

[0031] Figure 6 It is a schematic structural diagram of yet another embodiment of the aerosol-generating article of the present application.

[0032] Reference numerals:

[0033] 100 - aerosol-generating article; 10 - package; 12 - substrate layer; 121 - first substrate layer; 122 - second substrate layer; 123 - third substrate layer; 14 - functional film; 20 - smoke-generating part; 30 - cooling section; 40 - filter section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] As used herein, the terms:

[0035] "Prepared by" is synonymous with "comprising". As used herein, the terms "comprising", "including", "having", "containing" or any other variation thereof are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or apparatus that comprises the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article or apparatus.

[0036] The conjunctive "consisting of" excludes any unrecited element, step or component. If used in a claim, this phrase renders the claim closed-ended, excluding materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause within the body of a claim rather than immediately following the subject, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0037] When equivalents, concentrations, or other values or parameters are expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any upper range limit or preferred value with any lower range limit or preferred value, whether or not the ranges are separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted as including the ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range.

[0038] In these examples, unless otherwise specified, the parts and percentages are by mass.

[0039] "Parts by mass" refers to the basic measurement unit representing the mass ratio relationship of multiple components. 1 part can represent any unit mass, such as 1 g or 2.689 g, etc. If we say that the mass parts of component A is a parts and the mass parts of component B is b parts, it means the mass ratio of component A to component B is a:b. Or, it means the mass of component A is aK and the mass of component B is bK (K is any number representing a multiple factor). It should not be misunderstood that, different from the number of mass parts, the sum of the mass parts of all components is not limited to 100 parts.

[0040] "And / or" is used to indicate that either or both of the stated circumstances may occur. For example, A and / or B includes (A and B) and (A or B).

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In order to meet the demand for multi-flavor cartridges, it is often necessary to add flavors to the cartridges. Usually, the flavor solution is sprayed directly on the smoke-generating part. Due to the limitation of heating temperature (usually within 350°C), when the amount of flavor added is small, the characteristic aroma is not obviously stimulated; and when the amount of flavor added is large, the smoke-generating part is prone to seepage problems. At the same time, liquid flavors are also easy to volatilize. Therefore, after the aerosol-generating product is prepared, the penetration problem is superimposed on the volatilization problem, which makes the aroma of the cartridge decay quickly, resulting in a shortened shelf life of the cartridge.

[0043] In order to solve the above technical problems, related technologies add bursting beads to the filter rod segment. However, due to the circumferential diameter of the filter rod, the particle size of the bursting beads that can be added is relatively limited, resulting in less embedded flavors and fragrances. Therefore, it can only provide the aroma characteristics of the first 2-4 puffs, and the number of continuous puffs is insufficient.

[0044] In order to solve the above technical problems, the present application provides an aerosol generating product 100, see Figure 1 , Figure 5 and Figure 6 The aerosol generating product 100 includes a wrapping piece 10 wrapped around the outer peripheral surface of the aerosol generating product 100, and a smoke-generating part 20 arranged in the wrapping piece 10; the wrapping piece 10 includes a substrate layer 12 and a functional film 14 attached to at least a portion of the inner surface of the substrate layer 12, the functional film 14 includes a film-forming material and a functional material attached to the film-forming material, the functional film 14 is in contact with the smoke-generating part 20, and / or the functional film 14 can be heated by the aerosol generated by the smoke-generating part 20 to release the functional material.

[0045] In some embodiments, the smoke generating unit 20 includes a core material, which may be tobacco raw material, non-tobacco plant or a fiber paper substrate adsorbed with a smoke generating agent, etc. The core material may be in the form of particles, pulp, filaments, sheets, etc.

[0046] In some embodiments, the substrate layer 12 in the package 10 can be a paper tube, an aluminum foil tube, an aluminum foil paper tube, a ceramic tube, a silicone rubber tube, a heat-resistant resin tube, or the like.

[0047] In some embodiments, the functional diaphragm 14 includes a film-forming material and a functional material attached to the film-forming material. The functional material can be, for example, a smoke generator, a fragrance, a sweetener, a cooling agent, etc., and can be added according to different requirements. The film-forming material can be selected to be solid at room temperature and melt into a liquid state under certain temperature heating conditions, and its shape is prepared to match the film shape of the substrate layer 12 and can be laminated on the substrate layer 12. The functional diaphragm 14 is in a solid film state at normal temperature and releases fragrance when heated.

[0048] In some embodiments, the film-forming material can be, for example, at least one of guar gum, xanthan gum, tamarind polysaccharide gum, carrageenan, gelatin, gum arabic, agar, alginic acid, carboxymethyl cellulose, polyvinyl alcohol, polyvinylamine, and polyvinylpyrrolidone.

[0049] In some embodiments, please refer to Figure 1 and Figure 2 , the functional diaphragm 14 is provided on the substrate layer 12 on the outer peripheral surface of the smoke generating part 20. At this time, the functional diaphragm 14 is in direct contact with the smoke generating part 20. When the smoke generating part 20 is heated to generate smoke, the functional diaphragm 14 located on the outer peripheral surface of the smoke generating part 20 can be melted. The heating temperature of the smoke generating part 20 is between 200°C and 350°C. After the functional diaphragm 14 provided on the smoke generating part 20 is heated, it will melt and vaporize. Therefore, a functional material with a high boiling point and high temperature resistance can be selected for making the functional diaphragm 14, so that it can be released to the greatest extent when the smoke generating part 20 is heated, preventing it from melting instantly and not being able to continuously provide fragrance. Moreover, the added film-forming material will also melt into the aerosol. Therefore, the functional diaphragm 14 cannot have miscellaneous odors.

[0050] In some embodiments, please refer to Figure 1 , Figure 5 and Figure 6 , the aerosol generating article 100 further includes a cooling section 30 and a filter section 40 provided in the wrapper 10;

[0051] The functional diaphragm 14 is provided on the substrate layer 12 on the outer peripheral surface of at least one of the filter section 40, the cooling section 30, and the smoke generating part 20.

[0052] As Figure 1 shows the situation where the functional diaphragm 14 is provided on the substrate layer 12 on the outer peripheral surface of the smoke generating part 20. The functional diaphragm 14 can be provided only on the substrate layer 12 wrapping the smoke generating part 20. At this time, the functional diaphragm 14 is in contact with the smoke generating part 20; as Figure 5 shows the situation where the functional diaphragm 14 is provided on the substrate layer 12 on the outer peripheral surface of the filter section 40. The functional diaphragm 14 can also be provided only on the substrate layer 12 wrapping the filter section 40. At this time, the functional diaphragm 14 can be heated by the aerosol generated by the smoke generating part 20 to release the functional material; as Figure 6Shown is the case where the functional diaphragm 14 is disposed on the base material layer 12 on the outer peripheral surfaces of the aerosol generating part 20 and the filter tip section 40. The functional diaphragm 14 can be disposed on the base material layer 12 wrapping the aerosol generating part 20 and the filter tip section 40. At this time, the functional diaphragm 14 is in contact with the aerosol generating part 20, and the functional diaphragm 14 can be heated by the aerosol generated by the aerosol generating part 20 to release the functional material. Of course, the functional diaphragm 14 can also be disposed on the base material layer 12 on the outer peripheral surface of the cooling section 30.

[0053] In some embodiments, the cooling section 30 is used to provide a space for aerosol mixing and cooling, and cool the aerosol generated by the aerosol generating part 20 so that the aerosol generated by the aerosol generating part 20 meets the suction requirements. The cooling section 30 can be an empty tube or other tubular elements with holes or grooves.

[0054] In some embodiments, the filter tip section 40 is used to filter the aerosol and further cool it or filter and adsorb harmful substances. The filter tip section 40 can be a cellulose acetate filter rod, a polypropylene filter rod (polypropylene fiber rod), a polylactic acid filter rod, and a paper filter rod.

[0055] In some embodiments, please refer to Figure 3 and Figure 4 , the functional diaphragm 14 in the wrapper 10 is attached to at least a part of the inner surface of the base material layer 12. For example, the functional diaphragm 14 can be disposed only at the position wrapping the aerosol generating part 20, or only at the position wrapping the cooling section 30, or only at the position wrapping the filter tip section 40. It can also be disposed at the position of any two of the aerosol generating part 20, the cooling section 30, and the filter tip section 40, or at the position of simultaneously wrapping the aerosol generating part 20, the cooling section 30, and the filter tip section 40, etc. The functional diaphragm 14 can be distributed on a part of or the entire inner surface of the part of the base material layer 12 wrapping the aerosol generating part 20 and / or the cooling section 30 and / or the filter tip section 40.

[0056] In some embodiments, when the functional diaphragm 14 is not in direct contact with the aerosol generating part 20 but is disposed on the cooling section 30 and the filter tip section 40, the functional diaphragm 14 does not melt during the use of the aerosol generating article 100. Melting will contaminate the filter tip and affect suction. The temperature of the aerosol passing through the filter tip section 40 is 30 - 50 °C, and only the aroma needs to be carried out through the filter tip section 40. Therefore, a functional material with a low boiling point, such as a low-carbon ester fragrance, needs to be selected so that at least 60% of the aroma can volatilize at 30 - 50 °C. The film-forming material is selected as a glue and a film-forming agent with good desorption properties. The film-forming material does not melt and has lower requirements for miscellaneous gases.

[0057] In the production process of related art e-cigarette cartridges, the process usually involves adding the tobacco core material first and then adding flavor. The flavor is determined according to the type and characteristics of the e-cigarette cartridge product. Generally, one flavor is only applicable to a specific type of aerosol-generating product. For the second step of adding flavor, it is necessary to wait until the tobacco core material is prepared, then add the flavor and spray it. And it needs to be placed for a period of time for penetration and adsorption. The aerosol-generating product 100 provided by the present application attaches the functional material to the film-forming material to form the functional film 14, and the functional film 14 is laminated on the substrate layer 12 to form the package 10, ensuring that the functional film 14 is in direct contact with the smoking part 20 and / or can be heated by the aerosol generated by the smoking part 20 to release the functional material. The production of the functional film 14 can be carried out simultaneously with the production of the tobacco core material and the smoking part 20, eliminating the step of spraying flavor and storing the tobacco, simplifying the process and saving time.

[0058] The aerosol-generating product 100 provided by the present application prepares the functional material into a solid gel-like functional film 14, which can add more functional materials, is not prone to liquid leakage at room temperature, has a more stable form and system, and has the functions of locking flavor and slow release, which can improve the problem of aroma attenuation, extend the shelf life, prevent liquid leakage, and is convenient for mass sample preparation.

[0059] In related art, the particulate e-cigarette cartridge adopts a fixed-volume filling method. For the same flavor, the volume and weight are the same. However, for different flavors, due to the differences in the types, addition amounts, and bulk densities of the flavoring agents, the weights are different when filling the same volume. The aerosol-generating product 100 of the present application is used for particulate e-cigarette cartridges. The gram weight, length, and width of the functional film 14 are uniformly specified, and the weight of the tobacco particles is the same when the volume is the same, which is convenient for controlling the weights of e-cigarette cartridges with different flavors, thereby reducing costs.

[0060] In some embodiments, please refer to Figure 6 , a functional film 14 is provided on the outer peripheral surface of the substrate layer 12 of the smoking part 20 and the filter section 40; the functional material of the functional film 14 covering the outer peripheral surface of the smoking part 20 includes a smoking agent, and the functional material of the functional film 14 covering the outer peripheral surface of the filter section 40 does not include a smoking agent.

[0061] The functional film 14 covering the outer peripheral surface of the filter section 40 can be added with flavor, sweetener, and cooling agent to improve the taste from the filter section 40. The functional film 14 covering the outer peripheral surface of the smoking part 20 can be added with a smoking agent, flavor, sweetener, cooling agent, etc. for supplementing the aroma and smoke.

[0062] In some embodiments, the functional material in the functional film 14 provided on the outer peripheral surface of the smoking part 20 can be at least one of a smoking agent, flavor, sweetener, and cooling agent;

[0063] The functional material in the functional film 14 provided on the outer peripheral surface of the filter section 40 can be at least one of flavor, sweetener, and cooling agent.

[0064] In some embodiments, please continue to refer to Figure 6 , the substrate layer 12 includes a plurality of substrate layers 12, and the plurality of substrate layers 12 includes a first substrate layer 121 wrapped around the outer peripheral surface of the smoke generating part 20, a second substrate layer 122 wrapped around the outer peripheral surface of the filter section 40, and a third substrate layer 123 that joins the smoke generating part 20 and the filter section 40;

[0065] Function films 14 are provided on the portions of the first substrate layer 121, the second substrate layer 122, and the third substrate layer 123 that are located on the outer periphery of the cooling section 40.

[0066] In some embodiments, the first substrate layer 121 may be cigarette paper, the second substrate layer 122 may be forming paper, and the third substrate layer 123 may be tipping paper / cork tipping paper, etc.

[0067] In some embodiments, the functional material of the function film 14 covering the first substrate layer 121 includes a smoke generating agent;

[0068] The functional material of the function film 14 covering the second substrate layer 122 includes at least one of flavoring agents, sweetening agents, and cooling agents;

[0069] The functional material of the function film 14 covering the third substrate layer 123 includes at least one of flavoring agents, sweetening agents, and cooling agents, and is different from the functional material covering the second substrate layer 122.

[0070] By providing function films 14 on both the smoke generating part 20, the cooling section 30, and the filter section 40, and the functional materials carried by each function film 14 are different, a synergistic effect can be achieved, which can both increase the aerosol amount of the aerosol generating article 100 and increase the aroma and adjust the taste.

[0071] The present application also provides a method for preparing an aerosol generating article for preparing the above-mentioned aerosol generating article 100, including:

[0072] Preparing the function film 14 and attaching it to the substrate 12 to obtain a package 10;

[0073] Wrapping the package 10 around the smoke generating part 20 to obtain the aerosol generating article 100.

[0074] In some embodiments, the method for preparing the function film includes:

[0075] Mixing a molten film-forming material with a functional material to obtain a mixed solution;

[0076] Preparing the mixed solution into a film and drying it to obtain the function film.

[0077] In some embodiments, the film-forming material may be, for example, at least one of guar gum, xanthan gum, tamarind polysaccharide gum, carrageenan, gelatin, gum arabic, agar, alginic acid, carboxymethyl cellulose, polyvinyl alcohol, polyvinylamine, and polyvinylpyrrolidone. The film-forming material has good heat resistance, salt resistance, acid resistance, freeze-thaw resistance, and functions of stabilizing, emulsifying, thickening, coagulating, water retention, and film-forming. The viscosity of its aqueous solution is relatively high and is not affected by acids, salts, etc. The functional material may be at least one of a smoke agent, a fragrance, a sweetener, and a cooling agent.

[0078] In some embodiments, the viscosity of the configured mixed solution before film formation is in the range of 9500±2500 mPa·s, maintaining the stability of the functional material, increasing the solubility of the functional material, and reducing the release rate. The tensile strength of the functional film after film formation is ≥7.7 MPa, the film-forming thickness is 100±5 μm, and the gram weight after film formation is 24 - 28 g / m 3 , which is in a film shape at room temperature, releases the functional material when heated, and the film has certain ductility and toughness, can be laminated on the substrate layer, and will not break, desorb, etc.

[0079] There are two commonly used methods for preparing thin films, namely the casting method and the hot melt extrusion method. Casting method: Pour the mixed solution evenly into a mold of appropriate size, wait for drying under appropriate environmental conditions until the film solidifies, and then roll it up. Hot melt extrusion method: Melt and extrude the mixed solution through a mold, press it into a film, and then roll it up.

[0080] The prepared thin film is dried under appropriate conditions to remove the moisture inside. Double-sided drying makes its water content uniform. Cut it according to the required size and gram weight into equal thin slices to obtain functional film pieces, which are laminated on the substrate layer.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0082] In addition, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims above, any one of the claimed embodiments can be used in any combination. The information disclosed in this background section is only intended to deepen the understanding of the overall background art of the present application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

Claims

1. An aerosol generating product, characterized in that It includes a wrapping piece wrapped around the outer peripheral surface of the aerosol generating product, and a smoking part arranged in the wrapping piece; the wrapping piece includes a substrate layer and a functional film sheet attached to at least a portion of the inner surface of the substrate layer, and the functional film sheet includes a film-forming material and a functional material attached to the film-forming material; the functional film sheet is in contact with the smoking part, and / or the functional film sheet can be heated by the aerosol generated by the smoking part to release the functional material.

2. The aerosol-generating article according to claim 1, wherein The functional film is arranged on the substrate layer on the outer peripheral surface of the smoke generating portion.

3. The aerosol-generating article according to claim 1, wherein The aerosol generating article further comprises a cooling section and a filter section disposed in the wrapper; The functional membrane is provided on the substrate layer on the outer peripheral surface of at least one of the filter segment, the temperature reduction segment, and the smoke generating section.

4. The aerosol-generating article according to claim 3, wherein: The functional membrane is arranged on the substrate layer of the outer peripheral surface of the smoke-generating part and the filter segment; the functional material of the functional membrane covering the outer peripheral surface of the smoke-generating part includes a smoke-generating agent, and the functional material of the functional membrane covering the outer peripheral surface of the filter segment does not include a smoke-generating agent.

5. The aerosol-generating article according to claim 3, wherein: The functional material in the functional film disposed on the outer peripheral surface of the smoke generating portion includes at least one of a smoke generating agent, a flavor, a sweetener, and a cooling agent; The functional material in the functional membrane sheet disposed on the outer peripheral surface of the filter segment includes at least one of flavors, sweeteners, and cooling agents.

6. The aerosol-generating article of claim 4, wherein: The substrate layer includes a plurality of substrate layers, the plurality of substrate layers including a first substrate layer wrapped around the outer circumference of the smoke generating portion, a second substrate layer wrapped around the outer circumference of the filter segment, and a third substrate layer connecting the smoke generating portion and the filter segment; The functional membrane is disposed on the first substrate layer, the second substrate layer, and the third substrate layer at the periphery of the temperature reduction section.

7. An aerosol-generating article according to claim 6, characterized in that The functional material of the functional film sheet covered on the first substrate layer includes a smoke generating agent; The functional material of the functional film sheet covered on the second substrate layer includes at least one of flavor, sweetener, and cooling agent; The functional material of the functional film sheet covered on the third substrate layer includes at least one of flavor, sweetener, and cooling agent, and is different from the functional material covered on the second substrate layer.

8. An aerosol-generating article according to any one of claims 1 to 7, characterized in that The functional film is in a solid state at normal temperature; when the smoke generating portion is heated to generate smoke, the functional film located on the outer peripheral surface of the smoke generating portion may melt.

9. A method for preparing an aerosol-generating product, characterized in that: Used to prepare the aerosol generating product according to any one of claims 1 to 8, characterized in that it comprises: preparing a functional membrane and attaching it to a substrate to obtain a package; The packaging member is used to wrap the smoke-generating portion to obtain the aerosol-generating product.

10. The method for preparing an aerosol-generating article according to claim 9, characterized in that: The method for preparing the functional membrane comprises: Mixing a molten film-forming material with a functional material to obtain a mixed solution; The mixed solution is prepared into a thin film and dried to obtain the functional membrane.

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