Aerosol generating device, preparation method thereof and aerosol generating system

Abstract

The invention provides an aerosol generating device, a preparation method thereof and an aerosol generating system. The aerosol generating device comprises a wrapping material layer, a particle layer, a filtering body, a hollow device and an aerosol substrate. The outer side of the aerosol substrate is wrapped with the wrapping material layer; the particle layer is located between the wrapping material layer and the aerosol matrix; the particle layer comprises a porous particle material, the porous particle material comprises first particles and second particles, the particle size of the first particles is x, the particle size of the second particles is y, and x is larger than 0.25 mm and smaller than or equal to 0.425 mm, and y is larger than 0.075 mm and smaller than or equal to 0.15 mm. The aerosol generating device can effectively reduce the acetaldehyde release amount, and has a good anti-permeation effect.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generating devices, and in particular to an aerosol generating device and a preparation method thereof, and an aerosol generating system. Background Art

[0002] An aerosol generating device is a device that can convert liquid or solid substances into aerosols, which can be applied to tobacco products to generate tobacco in aerosol form.

[0003] Heat-not-burn cigarettes are a new type of tobacco product containing an aerosol matrix. Their heating temperature is much lower than the combustion temperature of traditional cigarettes, and the harmful components produced during the combustion process are less than traditional cigarettes. Therefore, they have developed rapidly in recent years.

[0004] Commonly used smoke-generating agents include glycerin or mixed solvents containing glycerin, but glycerin has extremely strong water absorption. During the storage and use of cigarettes, glycerin and tobacco substances dissolved in glycerin easily penetrate the wrapping material to form spots on the outer surface, resulting in a decrease in consumer sensory experience. At present, in order to improve the above problems, commonly used methods include: using anti-permeation wrapping materials coated with silicone oil, setting a composite metal layer on the side of the wrapping material close to the aerosol matrix, or using double-layer wrapping materials; however, the above methods do not achieve good improvement results.

[0005] Therefore, it is necessary to further improve the traditional technology. Summary of the invention

[0006] Based on this, one or more embodiments of the present application provide an aerosol generating device and a preparation method thereof, and an aerosol generating system that can reduce acetaldehyde release and have good anti-penetration effect.

[0007] According to a first aspect of the embodiments of the present application, there is provided 1. an aerosol generating device, comprising a wrapping material layer, a particle layer, a filter body, a hollow device and an aerosol matrix; the wrapping material layer is wrapped around the outside of the aerosol matrix; the particle layer is located between the wrapping material layer and the aerosol matrix;

[0008] The components of the particle layer include porous particle materials, and the porous particle materials include first particles and second particles. The particle size of the first particles is x, the particle size of the second particles is y, and 0.25mm<x≤0.425mm, 0.075mm<y≤0.15mm is satisfied.

[0009] In one embodiment, the aerosol generating device further comprises a tipping material layer, wherein the tipping material layer is wrapped around the outer sides of the filter body, the hollow device and the aerosol matrix which are connected in sequence.

[0010] In one embodiment, based on the total mass of the first particles and the second particles, the mass content of the first particles is 30wt%-60wt%, and the mass content of the second particles is 40wt%-70wt%.

[0011] In one embodiment, the porous granular material further includes third particles, the particle size of the third particles is z, and satisfies 0.15 mm<z≤0.25 mm.

[0012] In one embodiment, based on the mass of the porous particle material, the mass content of the first particles is 30wt%~60wt%; the mass content of the second particles is 30wt%~40wt%; and the mass content of the third particles is 10wt%~30wt%.

[0013] In one embodiment, the first particle, the second particle and the third particle are each independently selected from at least one of natural porous mineral materials, metal oxides, hydroxides, carbonates, sulfates, activated carbon and molecular sieves.

[0014] In one embodiment, the natural porous mineral material includes at least one of diatomaceous earth, montmorillonite, sepiolite and kaolin.

[0015] In one embodiment, the coating amount of the porous granular material is 10 g / m 2 ~60g / m 2 .

[0016] In one embodiment, the component of the particle layer further includes a binder mixed with the porous particle material.

[0017] In one embodiment, the binder is selected from at least one of gums, cellulose binders, polysaccharides, organic acids and conjugate alkali salts of organic acids.

[0018] In one embodiment, based on the mass of the porous granular material, the added amount of the binder is 0.05 wt% to 10 wt%.

[0019] According to a second aspect of an embodiment of the present application, there is provided a method for preparing an aerosol generating device as described in any one of the above, comprising the following steps:

[0020] Mixing the porous granular material, a binder and a solvent to prepare a composite slurry;

[0021] Applying the composite slurry to a surface of the packaging material layer in contact with the aerosol substrate, and drying to form a particle layer; and

[0022] The aerosol matrix is ​​wrapped with the wrapping material layer, with the surface of the wrapping material layer provided with the particle layer as the inner side. A surface of the wrapping material layer provided with the particle layer is in contact with the aerosol matrix. The filter body, the hollow device and the aerosol matrix are connected in sequence to obtain the aerosol generating device.

[0023] According to a third aspect of an embodiment of the present application, an aerosol generating system is provided, comprising the aerosol generating device as described in any one of the above items and a heating device.

[0024] In one embodiment, the heating device includes a heating component, a battery component for powering the heating device, a control component for controlling the battery component, and a housing for accommodating the heating component, the battery component, and the control component.

[0025] Compared with the traditional technology, this application has the following beneficial effects:

[0026] The present application arranges a particle layer containing porous granular materials inside the wrapping material layer. On the one hand, the particle layer forms a physical barrier between the aerosol matrix and the wrapping material layer. On the other hand, the porous granular materials in the particle layer can adsorb aldehydes and ketones such as acetaldehyde, thereby reducing the release of harmful substances in aerosol-based generating devices such as heat-not-burn cigarettes. At the same time, the porous granular materials with different particle sizes in the particle layer form an irregular surface, thereby reducing the contact area between the aerosol matrix and the wrapping material layer, thereby reducing the penetration of smoke-generating agents such as glycerin in the aerosol matrix into the wrapping material layer and forming spots. In this way, the above-mentioned aerosol generating device can reduce the release of acetaldehyde and has a good anti-penetration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of an aerosol generating device according to one embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the longitudinal section structure of an aerosol generating device prepared in one embodiment of the present application;

[0030] Figure 3 This is a schematic cross-sectional structure diagram of an aerosol generating device according to one embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the longitudinal section structure of an aerosol generating device prepared in another embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the longitudinal cross-sectional structure of an aerosol generating device prepared according to another embodiment of the present application.

[0033] Explanation of the reference numerals: 10, aerosol matrix; 20, hollow device; 30, filter body; 40, particle layer; 50, wrapping material layer; 60, connecting material layer. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise specifically stated, various raw materials, reagents, instruments and equipment used in the present application, etc. can be purchased from the market or can be prepared by existing methods.

[0036] In this application, "optionally", "optional", and "optional" mean optional or dispensable, that is, any one of the two parallel schemes of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0037] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0038] Some embodiments of the present application provide an aerosol generating device.

[0039] See also Figure 1 , Figure 2 and Figure 3 The aerosol generating device of some embodiments of the present application includes a wrapping material layer 50, a particle layer 40, a filter body 30, a hollow device 20 and an aerosol matrix 10; the wrapping material layer 50 is wrapped around the outside of the aerosol matrix 10; the particle layer 40 is located between the wrapping material layer 50 and the aerosol matrix 10;

[0040] The component of the particle layer 40 includes a porous particle material, the porous particle material includes a first particle and a second particle, the particle size of the first particle is x, the particle size of the second particle is y, and 0.25mm<x≤0.425mm, 0.075<y≤0.15mm is satisfied.

[0041] It should be noted that Figure 1 The middle wrapping material layer 50 and the particle layer 40 are both in an unfolded state.

[0042] It can be understood that the inner surface of the wrapping material layer in the present application refers to one side surface of the aerosol matrix 10 of the wrapping material layer 50 .

[0043] See also Figure 4 In some embodiments, the aerosol matrix further includes a tipping material layer 60, and the tipping material layer 60 is wrapped around the outer sides of the filter body 30, the hollow device 20 and the aerosol matrix 10 which are connected in sequence.

[0044] Understandably, see Figure 5 The tipping material layer 60 may be wrapped around the outer side of the filter body 30, the hollow device 20 and the aerosol matrix 10 which are connected in sequence and close to the hollow device.

[0045] In some of the embodiments, the aerosol generating device may be a heat-not-burn cigarette, but is not limited thereto.

[0046] In some embodiments, the material of the wrapping material layer 50 is selected from cigarette paper.

[0047] In some embodiments, the material of the tipping material layer 60 is selected from tipping paper.

[0048] The inner side of the wrapping material layer 50 in contact with the aerosol matrix 10 is coated with a porous granular material to form a granular layer 40, thereby reducing the area of ​​direct contact between substances such as glycerin in the aerosol matrix and the wrapping material layer and reducing the formation of penetration spots; at the same time, the porous granular material has an adsorption effect on harmful substances such as acetaldehyde, which can reduce the release amount of harmful substances in the aerosol.

[0049] It can be understood that by arranging a particle layer containing porous granular material on the inner side of the wrapping material layer, on the one hand, the particle layer forms a physical barrier between the aerosol matrix and the wrapping material layer, and on the other hand, the porous granular material in the particle layer can adsorb aldehydes and ketones such as acetaldehyde, thereby reducing the release of harmful substances in aerosol-based generating devices such as heat-not-burn cigarettes; at the same time, the porous granular materials with different particle sizes in the particle layer form an irregular surface, thereby reducing the contact area between the aerosol matrix and the wrapping material layer, thereby reducing the oily substances such as glycerin in the aerosol matrix from penetrating the wrapping material layer and forming spots.

[0050] In the present application, the particle size of the first particle is x, and satisfies 0.25mm<x≤0.425mm, and the value of x can be, for example, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm, 0.40mm, 0.41mm, 0.42mm or 0.425mm; or a range consisting of any two of these values.

[0051] In the present application, the particle size of the second particles is y, and satisfies 0.075<y≤0.15mm, and the value of y can be, for example, 0.085mm, 0.095mm, 0.105mm, 0.115mm, 0.125mm, 0.135mm, 0.145mm or 0.15mm; or a range consisting of any two of these values.

[0052] In some embodiments, based on the total mass of the first particles and the second particles, the mass content of the first particles is 30 wt % to 60 wt %; the mass content of the second particles is 40 wt % to 70 wt %.

[0053] It can be understood that, based on the total mass of the first particles and the second particles, the mass content of the first particles can be 30wt%, 35wt%, 40wt%, 45wt%, 50wt%, 55wt% or 60wt%; the mass content of the second particles can be 40wt%, 45wt%, 50wt%, 55wt%, 60wt%, 65wt% or 70wt%.

[0054] In some embodiments, the porous granular material further includes third particles, the particle size of the third particles is z, and satisfies 0.15 mm<z≤0.25 mm.

[0055] It can be understood that the particle size of the third particles can be z and satisfy 0.15mm<z≤0.25mm, and the value of z can be, for example, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm or 0.25mm.

[0056] In some embodiments, based on the mass of the porous particle material, the mass content of the first particles is 30wt%-60wt%; the mass content of the second particles is 30wt%-40wt%; and the mass content of the third particles is 10wt%-30wt%.

[0057] Understandably, based on the mass of the porous granular material, the mass content of the third particles can be 10wt%, 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt% or 30wt%.

[0058] In some embodiments, the first particles, the second particles, and the third particles are each independently selected from at least one of natural porous mineral materials, metal oxides, hydroxides, carbonates, sulfates, activated carbon, and molecular sieves.

[0059] In some embodiments, the natural porous mineral material includes at least one of diatomaceous earth, montmorillonite, sepiolite and kaolin; the metal oxide includes at least one of calcium oxide and magnesium oxide; the hydroxide includes calcium hydroxide; the carbonate includes calcium carbonate; and the sulfate includes calcium sulfate.

[0060] In some embodiments, the coating amount of the porous particulate material is 10 g / m 2 ~60g / m 2 . For example, it can be 10g / m 2 , 15g / m 2 , 20g / m 2 , 25g / m 2 , 30g / m 2 , 35g / m 2 , 40g / m 2 , 45g / m 2 , 50g / m 2 , 55g / m 2 Or 60g / m 2 .

[0061] In some optional examples, the coating amount of the porous granular material is 10 g / m 2 ~50g / m 2 .

[0062] In some optional examples, the coating amount of the porous granular material is 10 g / m 2 ~30g / m 2 .

[0063] In some embodiments, the composition of the particle layer further includes a binder intermixed with the porous particle material.

[0064] It is understood that the adhesive enables the porous granular material to adhere to the wrapping material layer and not fall off.

[0065] In some embodiments, the binder is selected from at least one of a gum, a cellulose binder, a polysaccharide, an organic acid, and a conjugate base salt of an organic acid.

[0066] In some specific examples, the gum is selected from at least one of guar gum, xanthan gum, gum arabic and locust bean gum; the cellulose binder is selected from at least one of hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl cellulose; the polysaccharide is selected from starch; the organic acid is selected from alginic acid; and the conjugate base salt of the organic acid is selected from at least one of sodium alginate, agar and pectin.

[0067] In some embodiments, the amount of binder added is 0.05 wt% to 10 wt% based on the mass of the porous granular material, for example, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt%, 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1.0 wt%, 2.0 wt%, 3.0 wt%, 4.0 wt%, 5.0 wt%, 6.0 wt%, 7.0 wt%, 8.0 wt%, 9.0 wt% or 10 wt%.

[0068] A second aspect of the present application provides a method for preparing the above-mentioned aerosol generating device, comprising steps S10 to S30.

[0069] Step S10: mixing the porous granular material, the binder and the solvent to prepare a composite slurry;

[0070] Step S20: coating the composite slurry onto a surface of the packaging material layer in contact with the aerosol matrix, and drying to form a particle layer; and

[0071] Step S30: With the surface of the wrapping material layer provided with the particle layer as the inner side, the aerosol matrix is ​​wrapped with the wrapping material layer, one surface of the wrapping material layer provided with the particle layer is in contact with the aerosol matrix, and the filter body, the hollow device and the aerosol matrix are connected in sequence to obtain an aerosol generating device.

[0072] The above-mentioned preparation method of the present application has the advantages of simple process and easy operation.

[0073] A third aspect of the present application provides an aerosol generating system, comprising the aerosol generating device of the first aspect and a heating device.

[0074] In one embodiment, the heating device includes a heating component, a battery component for powering the heating device, a control component for controlling the battery component, and a housing for accommodating the heating component, the battery component, and the control component.

[0075] The present application does not impose any particular limitation on the heating component, battery component, control component and housing, and they may be made of materials and in shapes commonly used in the art.

[0076] The aerosol generating system of the present application has the advantages of low release of harmful substances such as glycidol and good safety.

[0077] The present application will be further described below in conjunction with specific examples and comparative examples, but they should not be construed as limiting the scope of protection of the present application. The raw materials involved in the following specific examples, unless otherwise specified, can all be sourced from commercial sources, the instruments used, unless otherwise specified, can all be sourced from commercial sources, and the processes involved, unless otherwise specified, are all conventionally selected by those skilled in the art.

[0078] Embodiment 1:

[0079] (1) A first granular activated carbon having a particle size of 0.250 mm to 0.425 mm and a second granular activated carbon having a particle size of 0.075 mm to 0.150 mm are mixed to obtain a porous granular material; wherein the mass content of the first granules is 30 wt %, and the mass content of the second granules is 70 wt %.

[0080] The particle mixture is mixed with a binder (carboxymethyl cellulose) and water to obtain a composite slurry; the binder is added in an amount of 2 wt % based on the total weight of the porous particle material.

[0081] (3) The composite slurry is evenly coated on the entire inner surface of the wrapping material layer used to wrap the aerosol matrix; the inner surface of the wrapping material layer coated with the composite is in contact with the aerosol matrix, and the filter body, the hollow device and the aerosol matrix connected in sequence are wrapped with a plugging paper. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 10 g / m 2 .

[0082] Embodiment 2:

[0083] The method is basically the same as Example 1, except that the mass content of the first particles is 40wt%, the mass content of the second particles is 60wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 20g / m 2 .

[0084] Embodiment 3:

[0085] The method is basically the same as Example 1, except that the mass content of the first particles is 50wt%, the mass content of the second particles is 50wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 30g / m 2 .

[0086] Embodiment 4:

[0087] The method is basically the same as Example 1, except that the mass content of the first particles is 60wt%, the mass content of the second particles is 40wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 40g / m 2 .

[0088] Embodiment 5:

[0089] The same as Example 2, except that: the type of the second particle is diatomaceous earth; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 50 g / m 2 .

[0090] Embodiment 6:

[0091] The same as Example 4, except that: the type of the second particle is diatomaceous earth; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 60g / m 2 .

[0092] Embodiment 7:

[0093] The method is basically the same as Example 1, except that the type of the first particle is diatomaceous earth, the mass content of the first particle is 40wt%, and the mass content of the second particle is 60wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 30g / m 2 .

[0094] Embodiment 8:

[0095] The method is basically the same as Example 1, except that: the type of the first particle is diatomaceous earth, the mass content of the first particle is 60wt%, and the mass content of the second particle is 40wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 30g / m 2 .

[0096] Embodiment 9:

[0097] The method is basically the same as Example 1, except that: a first granular activated carbon with a particle size of 0.250 mm to 0.425 mm, a second granular activated carbon with a particle size of 0.075 mm to 0.150 mm, and a third granular activated carbon with a particle size of 0.150 mm to 0.250 mm are mixed to obtain a porous granular material; wherein the mass content of the first granules is 30 wt%, the mass content of the second granules is 40 wt%, and the mass content of the third granules is 30 wt%. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0098] Embodiment 10:

[0099] The method is basically the same as Example 1, except that: a first particle of diatomaceous earth with a particle size of 0.250 mm to 0.425 mm, a second particle of diatomaceous earth with a particle size of 0.075 mm to 0.150 mm, and a third particle of diatomaceous earth with a particle size of 0.150 mm to 0.250 mm are mixed to obtain a porous granular material; wherein the mass content of the first particle is 40 wt %, the mass content of the second particle is 40 wt %; and the mass content of the third particle is 20 wt %. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0100] Embodiment 11:

[0101] The method is basically the same as Example 1, except that: a first particle activated carbon with a particle size of 0.250 mm to 0.425 mm, a second particle activated carbon with a particle size of 0.075 mm to 0.150 mm, and a third particle diatomaceous earth with a particle size of 0.150 mm to 0.250 mm are mixed to obtain a porous particle material; wherein the mass content of the first particle is 50 wt %, the mass content of the second particle is 40 wt %; and the mass content of the third particle is 10 wt %. The coating amount of the porous particle material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0102] Embodiment 12:

[0103] The method is basically the same as Example 1, except that: a first particle activated carbon with a particle size of 0.250 mm to 0.425 mm, a second particle diatomaceous earth with a particle size of 0.075 mm to 0.150 mm, and a third particle activated carbon with a particle size of 0.150 mm to 0.250 mm are mixed to obtain a porous particle material; wherein the mass content of the first particle is 60 wt %, the mass content of the second particle is 30 wt %; and the mass content of the third particle is 10 wt %. The coating amount of the porous particle material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0104] Embodiment 13:

[0105] The method is basically the same as Example 1, except that: a first particle of diatomaceous earth with a particle size of 0.250 mm to 0.425 mm, a second particle of diatomaceous earth with a particle size of 0.075 mm to 0.150 mm, and a third particle of activated carbon with a particle size of 0.150 mm to 0.250 mm are mixed to obtain a porous granular material; wherein the mass content of the first particle is 40 wt %, the mass content of the second particle is 40 wt %; and the mass content of the third particle is 20 wt %. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0106] Embodiment 14:

[0107] The method is basically the same as Example 1, except that: the type of the first particle is montmorillonite, and the type of the second particle is sepiolite; the mass content of the first particle is 30wt%, and the mass content of the second particle is 70wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 20g / m 2 .

[0108] Embodiment 15:

[0109] The method is basically the same as Example 1, except that: the type of the first particle is sepiolite, and the type of the second particle is magnesium oxide; the mass content of the first particle is 50wt%, and the mass content of the second particle is 50wt%; the coating amount of the porous particle material on the inner surface of the wrapping material layer is 50g / m 2 .

[0110] Comparative Example 1:

[0111] (1) Activated carbon particles with a particle size of 0.250 mm to 0.425 mm are mixed with a binder (carboxymethyl cellulose) and water to obtain a composite slurry; the amount of the binder added is 2 wt% based on the total weight of the activated carbon particles.

[0112] (2) The composite slurry is evenly coated on the entire inner surface of the wrapping material layer that wraps the aerosol matrix; the inner surface of the wrapping material layer coated with the composite slurry is brought into contact with the aerosol matrix, and the filter body, the hollow device and the aerosol matrix that are connected in sequence are wrapped with a plugging paper to obtain a heat-not-burn cigarette. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 30 g / m 2 .

[0113] Comparative Example 2:

[0114] It is basically the same as Comparative Example 1, except that the particle size of the activated carbon granular material is 0.150 mm to 0.250 mm.

[0115] Comparative Example 3:

[0116] It is basically the same as Comparative Example 1, except that the particle size of the activated carbon granular material is 0.075 mm to 0.150 mm.

[0117] Comparative Example 4:

[0118] The same as Comparative Example 2, except that the coating amount of the porous granular material on the inner surface of the wrapping material layer is 5 g / m 2 .

[0119] Comparative Example 5:

[0120] The same as the comparative example 2, except that the coating amount of the porous granular material on the inner surface of the wrapping material layer is 10 g / m 2 .

[0121] Comparative Example 6:

[0122] The same as the comparative example 2, except that the coating amount of the porous granular material on the inner surface of the wrapping material layer is 60 g / m 2 .

[0123] Comparative Example 7:

[0124] The same as the comparative example 2, except that the coating amount of the porous granular material on the inner surface of the wrapping material layer is 65 g / m 2 .

[0125] Comparative Example 8:

[0126] The same as comparative example 1, except that the porous granular material is selected from diatomaceous earth particles with a particle size of 0.150 mm to 0.250 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 35 g / m 2 .

[0127] Comparative Example 9:

[0128] It is basically the same as Comparative Example 8, except that the particle size of the diatomaceous earth granular material is 0.425 mm to 0.850 mm.

[0129] Comparative Example 10:

[0130] It is basically the same as Comparative Example 8, except that the particle size of the diatomaceous earth granular material is less than 0.075 mm.

[0131] Comparative Example 11:

[0132] The same as the comparative example 1, except that the porous granular material is selected from calcium carbonate particles with a particle size of 0.250 mm to 0.425 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 10 g / m 2 .

[0133] Comparative Example 12:

[0134] The same as the comparative example 1, except that the porous granular material is selected from montmorillonite particles with a particle size of 0.150 mm to 0.250 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 20 g / m 2 .

[0135] Comparative Example 13:

[0136] The same as comparative example 1, except that the porous granular material is selected from sepiolite particles with a particle size of 0.075 mm to 0.150 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 40 g / m 2 .

[0137] Comparative Example 14:

[0138] The same as comparative example 1, except that the porous granular material is selected from kaolin particles with a particle size of 0.150 mm to 0.250 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 50 g / m 2 .

[0139] Comparative Example 15:

[0140] The same as the comparative example 1, except that the porous granular material is selected from magnesium oxide particles with a particle size of 0.150 mm to 0.250 mm. The coating amount of the porous granular material on the inner surface of the wrapping material layer is 60 g / m 2 .

[0141] The parameters for preparing the heat-not-burn cigarettes in Examples 1 to 15 are shown in Table 1; the parameters for preparing the heat-not-burn cigarettes in Comparative Examples 1 to 15 are shown in Table 2.

[0142] Table 1

[0143]

[0144] Table 2

[0145]

[0146] It should be noted that in the above Tables 1 and 2, "0.075~0.150" means that the particle size is greater than 0.075 mm and less than or equal to 0.15 mm; "0.150~0.250" means that the particle size is greater than 0.150 mm and less than or equal to 0.250 mm; "0.250~0.425" means that the particle size is greater than 0.250 mm and less than or equal to 0.425 mm; "0.425~0.850" means that the particle size is greater than 0.425 mm and less than or equal to 0.85 mm.

[0147] Performance Test:

[0148] According to the standard of GB / T 16447-2004, the heat-not-burn cigarettes prepared in Examples 1 to 15 and Comparative Examples 1 to 15 and the control sample were equilibrated for 48 hours in an environment of (22±1)°C and a relative humidity of 60%±3% to test the conventional anti-permeation effect of the above samples. Here, equilibrium means that the sample is placed under a constant temperature and humidity for a period of time to allow the inside and outside of the sample to reach a uniform state.

[0149] Subsequently, the heat-not-burn cigarettes prepared in Examples 1 to 4 and Comparative Examples 1 to 9 and the control samples were equilibrated in an environment of (25±1)°C and a relative humidity of 65%±3% for 48 hours; the enhanced anti-permeability effect of the above samples was tested; and the heat-not-burn cigarettes were smoked using a linear smoking machine, with ambient heating and a heating temperature setting of 220°C. The smoking parameters of the cigarettes were: the puffing capacity was 55mL; the puffing time was 2s; the puffing interval was 30s; the number of puffs was 8 times; the preheating time was 18s; and the puffing curve was a bell-shaped puffing curve. The bell-shaped puffing curve refers to the change in the puffing capacity over time during the puffing process, which presents a bell-shaped curve characteristic.

[0150] The method for determining the anti-permeation effect is as follows: 10 heat-not-burn cigarettes of each embodiment and comparative example are provided, and the spots on the outside of the wrapping material layer are observed after conventional treatment, enhanced treatment, and smoking. The number of heat-not-burn cigarettes with spots is used as the evaluation standard. The fewer the number of spots, the better the anti-permeation effect.

[0151] The acetaldehyde content released by the above-mentioned embodiments, comparative examples and control samples was tested by HPLC-DAD method (Peng Xinhui, Sun Jianhua, Sun Nan, et al. Investigation of factors affecting the content of formaldehyde and acetaldehyde in glycerol controlled pyrolysis aerosol [J]. Journal of Natural Science of Hunan Normal University, 2022, 45 (6): 125-129.), and the results are shown in Table 3. Among them, the control sample is a heat-not-burn cigarette without a particle layer between the wrapping material layer and the aerosol matrix; the corresponding value under the anti-permeation effect in Table 3 is the number of cigarettes with spots in the 10 cigarettes to be tested.

[0152] Table 3

[0153]

[0154] As can be seen from the table above, setting a particle layer containing a mixture of large and small particles between the aerosol matrix and the wrapping material layer of the heat-not-burn cigarette can effectively reduce the penetration of atomizers such as glycerin into spots and improve consumer experience. At the same time, the porous particle material can adsorb aldehydes and ketones in the aerosol of heat-not-burn cigarettes and reduce the release of harmful substances.

[0155] In Comparative Examples 1 to 15, the porous granular material only contains one type of granular material with a similar particle size, and the number of heat-not-burn cigarettes with penetration spots after 8 puffs is significantly increased, indicating that its anti-permeation effect is worse than that of the examples. When the coating amount of the porous granular material is the same (such as Example 1 and Comparative Example 5), the granular layer obtained by mixing and coating two or more granular materials has a better adsorption effect on acetaldehyde.

[0156] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0157] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An aerosol generating device, characterized in that: It comprises a wrapping material layer, a particle layer, a filter body, a hollow device and an aerosol matrix; the wrapping material layer is wrapped around the outside of the aerosol matrix; the particle layer is located between the wrapping material layer and the aerosol matrix; The components of the particle layer include porous particle materials, and the porous particle materials include first particles and second particles. The particle size of the first particles is x, the particle size of the second particles is y, and 0.25mm<x≤0.425mm, 0.075mm<y≤0.15mm is satisfied.

2. The aerosol generating device according to claim 1, characterized in that: It also includes a tipping material layer, which is wrapped around the outer sides of the filter body, the hollow device and the aerosol matrix which are connected in sequence.

3. The aerosol generating device according to claim 1, characterized in that: Based on the total mass of the first particles and the second particles, the mass content of the first particles is 30wt% to 60wt%, and the mass content of the second particles is 40wt% to 70wt%.

4. The aerosol generating device according to any one of claims 1 to 3, characterized in that: The porous granular material further includes third particles, the particle size of the third particles is z, and satisfies 0.15 mm<z≤0.25 mm.

5. The aerosol generating device according to claim 4, characterized in that: Based on the mass of the porous particle material, the mass content of the first particles is 30wt% to 60wt%; the mass content of the second particles is 30wt% to 40wt%; and the mass content of the third particles is 10wt% to 30wt%.

6. The aerosol generating device according to claim 4, characterized in that: The first particles, the second particles and the third particles are each independently selected from at least one of natural porous mineral materials, metal oxides, hydroxides, carbonates, sulfates, activated carbon and molecular sieves.

7. The aerosol generating device according to claim 6, characterized in that: The natural porous mineral material includes at least one of diatomaceous earth, montmorillonite, sepiolite and kaolin.

8. The aerosol generating device according to any one of claims 1 to 3 and 5 to 7, characterized in that: The coating amount of the porous particle material is 10 g / m 2 ~60g / m 2 .

9. The aerosol generating device according to any one of claims 1 to 3 and 5 to 7, characterized in that: The components of the particle layer also include a binder intermixed with the porous particle material.

10. The aerosol generating device according to any one of claims 9, characterized in that: The binder is selected from at least one of gums, cellulose binders, polysaccharides, organic acids and conjugate alkali salts of organic acids.

11. The aerosol generating device according to claim 9, characterized in that: Based on the mass of the porous granular material, the added amount of the binder is 0.05wt% to 10wt%.

12. A method for preparing an aerosol generating device according to any one of claims 1 to 11, characterized in that: The steps include: Mixing the porous granular material, a binder and a solvent to prepare a composite slurry; Applying the composite slurry to a surface of the packaging material layer in contact with the aerosol substrate, and drying to form a particle layer; and The aerosol matrix is ​​wrapped with the wrapping material layer, with the surface of the wrapping material layer provided with the particle layer as the inner side. A surface of the wrapping material layer provided with the particle layer is in contact with the aerosol matrix. The filter body, the hollow device and the aerosol matrix are connected in sequence to obtain the aerosol generating device.

13. An aerosol generating system, characterized in that: It comprises the aerosol generating device and heating device as described in any one of claims 1 to 11.

14. The aerosol generating system according to claim 13, characterized in that: The heating device comprises a heating component, a battery component for supplying power to the heating device, a control component for controlling the battery component, and a housing for accommodating the heating component, the battery component and the control component.

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