Aerosol-generating article comprising aerosol-generating particles having coating layer

Abstract

The utility model discloses an aerosol generating product containing an aerosol generating particle with a coating layer, the aerosol generating product comprises an aerosol generating particle (2) with a coating layer, the aerosol generating particle with the coating layer is of a core-shell structure, the core body of the aerosol generating particle is an aerosol generating particle body, and the shell layer is a coating layer coated outside the aerosol generating particle body. According to the aerosol generating particle coating device, the surfaces of the aerosol generating particles are coated, the coating layers on the surfaces of the aerosol generating particles can prevent the aerosol generating particles from caking in the placing process, the fluidity of the aerosol generating particles in the filling process is improved, and the breakage rate of the particles in the filling process is reduced to a certain extent. In addition, the aerosol generated by heating the aerosol-generating particle body can still be smoothly and gradually released through the coating layer, and the fuming amount of the aerosol-generating particle body is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-not-burn cigarettes, in particular to an aerosol-generating product comprising aerosol-generating particles with a coating layer. Background Art

[0002] As consumers prioritize health and demand a personalized experience with cigarettes, the tobacco industry is continuously responding to these evolving needs by developing a variety of smoking products with reduced tar content and harm reduction. Heat-treated cigarettes, by contrast, differ from traditional cigarettes in their heating method, enabling them to satisfy consumers' sensory needs while providing a healthier smoking experience.

[0003] In the field of aerosol-generating products, particulate aerosol-generating products have attracted considerable attention due to their unique particulate aerosol-generating matrix. These products utilize a specific manufacturing process to package aerosol-generating particles into an outer tube, enabling the user to generate the desired aerosol upon use. However, these products face several pressing challenges during the manufacturing and packaging processes.

[0004] First, during the preparation and storage process, the smoke-generating agent contained within the aerosol-forming particles can leak out, causing the aerosol-forming particles to agglomerate. Furthermore, if the ambient humidity is high, the aerosol-forming particles are susceptible to absorbing moisture from the air, causing internal moisture. Particles that have leaked out or become damp are prone to agglomeration, which not only affects the dispersion and fluidity of the particles but can also prevent the particles from being evenly filled into the outer tube during the filling process, thereby affecting the quality of the final product and the user experience. Furthermore, the absorption of moisture by the aerosol-forming particles can also lead to a decrease in the amount of smoke produced by the aerosol-forming particles and an increase in the smoke temperature.

[0005] Secondly, the breakage rate of aerosol-forming particles during the filling process is also a concern. Because the granular aerosol-forming matrix is ​​susceptible to external forces and friction during filling, if the particles lack strength and toughness, they are prone to breakage during the filling process. This not only reduces product yield but also affects the taste and vapor quality of the final product.

[0006] Finally, during the storage and transportation of aerosol-generating particles, the smoke-generating agent easily seeps onto the surface of the cigarette paper, forming yellow spots. This not only affects the aesthetics of the cigarette, but may also have an adverse effect on the taste of the cigarette. In order to solve this problem, it is usually necessary to set a separate anti-seepage layer on the inside of the cigarette paper, which undoubtedly increases the production cost and process complexity. In addition, during the storage and transportation of aerosol-generating particles, the internal effective ingredients (such as smoke-generating agents, aroma components, etc.) will also be volatilized and lost, resulting in a short shelf life and a decrease in quality after being loaded into aerosol-generating products.

[0007] Therefore, it is of great significance to develop a preparation method capable of effectively solving the problems of moisture absorption and caking of aerosol generating particles and the problem of filling and crushing rate, and effectively preventing the exosmosis of smoking agent, for improving the quality and user experience of the particle type aerosol generating product. This is also one of the technical problems to be solved in the field of aerosol generating products.

[0008] In order to solve the above problems, the utility model provides a kind of aerosol generating product containing aerosol generating particle with coating layer and its preparation method. Utility model content

[0009] The utility model discloses to the above-mentioned insufficient, propose a kind of aerosol generating product containing aerosol generating particle with coating layer and its preparation method, aerosol generating product includes outer tube 1, and aerosol generating particle with coating layer 2, plugging piece 3, empty pipe piece 4 and filter piece 5 located in the outer tube 1;Aerosol generating particle with coating layer 2 upstream also has sealing piece 6;Aerosol generating particle with coating layer is core-shell structure, its core body is aerosol generating particle ontology, and the shell layer is the coating layer covered in the aerosol generating particle ontology outer.The coating of the utility model is carried out on the surface of aerosol generating particle, and the coating layer on the surface of aerosol generating particle can avoid the caking problem during the placement of aerosol generating particle, improve the fluidity when aerosol generating particle is canned, and reduce the crushing rate of particle during filling to some extent.In addition, the aerosol generated by heating aerosol generating particle ontology can still smoothly pass through the coating layer and gradually release, which will not affect the smoking amount of aerosol generating particle ontology itself.

[0010] The utility model discloses a kind of aerosol generating product containing aerosol generating particle with coating layer, which includes outer tube 1, and aerosol generating particle with coating layer 2, plugging piece 3 and filter piece 5 located in the outer tube 1;Aerosol generating particle with coating layer 2 upstream also has sealing piece 6;

[0011] The aerosol generating particle with coating layer 2 is a core-shell structure, with the aerosol generating particle ontology 21 as the core body and the coating layer 22 as the shell layer.

[0012] Preferably, an empty pipe piece 4 is further included between the plugging piece 3 and the filter piece 5, and the empty pipe piece 4 further has an air hole penetrating through the outer tube 1 and the pipe wall of the empty pipe piece 4.

[0013] Preferably, the material of the coating layer 22 includes but is not limited to ethyl cellulose, shellac and carnauba wax.

[0014] Preferably, the mass of the coating layer 22 accounts for 5-30% of the mass of the aerosol generating particle ontology 21.

[0015] The utility model discloses a second aspect provides a kind of preparation method of aerosol-generating article containing aerosol-generating particle with coating layer, comprising the following steps:

[0016] S1, preparation aerosol-generating particle body;The aerosol-generating particle body in this step can be prepared by any method in the prior art, and the present application is not limited. Wherein, during the preparation of aerosol-generating particle body, smoke agent, essence and the like are added, or after the preparation of aerosol-generating particle body is completed, smoke agent, essence and the like are separately adsorbed, and after drying after adsorption is completed, next coating is carried out.

[0017] S2, preparation coating material mixed solution;

[0018] S3, the aerosol-generating particle body obtained in step S1 is placed into coating equipment, and the coating material mixed solution obtained in step S2 is sprayed to make the coating material mixed solution uniformly adhere to the surface of the aerosol-generating particle body, so as to form a continuous, dense and durable film.

[0019] S4, after coating is completed, the aerosol-generating particle body with coating material is dried to make the coating layer solidify and adhere tightly to the aerosol-generating particle body, and the aerosol-generating particle with coating layer is obtained. This step helps to improve the stability and durability of the coating layer.

[0020] S5, the aerosol-generating particle with coating layer is canned into the outer tube 1 filled with the blocking piece 3 and the filter piece 5, and then the sealing piece 6 is arranged, to obtain the aerosol-generating article containing the aerosol-generating particle with coating layer.

[0021] If the blocking piece 3 and the filter piece 5 further include the empty tube piece 4, then in step 5, the aerosol-generating particle with coating layer is canned into the outer tube 1 filled with the blocking piece 3, the empty tube piece 4 and the filter piece 5.

[0022] Preferably, in step S2, the method for preparing the coating material is as follows: the coating material body is added into a solvent and stirred to prepare a coating material mixed solution with a mass concentration of 4-15%.

[0023] The coating material body includes but is not limited to ethyl cellulose, shellac and carnauba wax, and the solvent includes alcohol, such as anhydrous ethanol.

[0024] Preferably, in step S3, the coating process is carried out while spraying and stirring, and the time length is 10-20 minutes.

[0025] Preferably, in step S4, after coating is completed, the drying conditions include placing it in an oven for drying, or placing it in dry air for air drying. The drying conditions in the oven are: placing it in an oven at 45-60°C and baking for 10-15 minutes; the dry air drying conditions are: placing it in dry air at 45-60°C and air drying for 5-10 minutes.

[0026] Preferably, a pelletizing process is performed between step S4 and step S5. Specifically, the smoking particles are placed on a vibrating device and activated to loosen the smoking particles due to the vibration. The pelletizing process serves the following purposes: 1. It helps disperse the smoking particles, ensuring good fluidity during the filling process, allowing them to be evenly and continuously filled into the cigarettes. 2. It removes impurities and lumps. Sizing is a crucial step in the cigarette manufacturing process, directly impacting the quality and taste of the cigarettes.

[0027] Preferably, the vibration device comprises a vibrating screen or a vibrating table.

[0028] The sealing member 6 of the present invention can be a sealing member filled into the outer tube, or a sealing film attached to the end of the outer tube.

[0029] The blocking member 3 of the present invention can be selected from any conventional blocking member used for particulate aerosol generating products in the art, as long as it can block the aerosol generating particles and prevent the aerosol generating particles from moving into the empty pipe.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention coats the surface of aerosol-generating particles. The coating layer on the surface of aerosol-generating particles can effectively prevent the passage of moisture in the air, isolate the internal aerosol-generating particle body from the outside world, effectively reduce its hygroscopicity, and prevent the smoke-generating agent (only taking the smoke-generating agent as an example, but also including flavors, etc.) inside the aerosol-generating particle body from seeping to the particle surface, thereby avoiding the problem of agglomeration of aerosol-generating particles during placement and improving the fluidity of aerosol-generating particles when canned. It has been verified that after coating with the method of the present invention, the aerosol-generating particles were placed at a temperature of 25°C and a humidity of 60% for 15 days without agglomeration, and the fluidity was still very good, while the aerosol-generating particles that were not coated had obvious agglomeration. In addition, the aerosol-generating particles are prevented from absorbing moisture from the air, and the problem of a decrease in the amount of smoke from aerosol-generating particles and an increase in the temperature of the smoke is also avoided.

[0032] 2. Coating the surface of the aerosol generating particles can reduce the breakage rate of the particles during filling to some extent. The coating layer can provide protection and reduce the breakage of the particles caused by external pressure and friction during the filling process. In addition, the coating can improve the flowability and uniformity of the particles, allowing the particles to flow more smoothly during filling and further reducing breakage caused by particle-to-particle impact.

[0033] 3. The coating layer on the surface of the aerosol generating particles of the utility model can prevent the aerosol generating agent inside the aerosol generating particle body from exuding to the surface of the aerosol generating particles, and also avoids the problem of yellow spots caused by the exudation of the aerosol generating agent to the cigarette paper. Therefore, there is no need to additionally set a barrier layer on the cigarette paper, and the requirements for the cigarette paper are reduced.

[0034] 4. The coating layer on the surface of the aerosol generating particles of the utility model can also lock the internal components (such as the aerosol generating agent and aroma components) of the aerosol generating particles, avoiding the volatilization and loss of the internal components of the aerosol generating particles during storage.

[0035] 5. The coating material of the utility model is selected from ethyl cellulose. The coating layer formed by the material not only effectively prevents the passage of moisture, but also has certain air permeability. Therefore, after the aerosol generating particle body is heated to generate aerosol, the aerosol can still smoothly pass through the coating layer and gradually be released, without affecting the smoke yield of the aerosol generating particle body itself.

[0036] 6. The thickness of the coating layer and the preparation conditions during the coating process ensure the uniformity of the coating layer. The thickness and uniformity of the coating layer also greatly affect the volatilization rate. If the coating layer is too thick or uneven, it may hinder the release of volatile substances. However, appropriate thickness and uniformity of the coating layer can ensure that the volatile substances can smoothly pass through the coating layer when heated. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 FIG. 1 is a structural schematic diagram of an aerosol generating article containing aerosol generating particles with a coating layer.

[0038] Figure 2 FIG. 2 is a structural schematic diagram of aerosol generating particles with a coating layer.

[0039] The corresponding names of the reference signs are as follows: 1-outer tube, 2-aerosol generating particles with a coating layer, 3-plugging piece, 4-empty tube piece, 5-filtering piece, 6-sealing piece, 21-aerosol generating particle body, 22-coating layer. DETAILED DESCRIPTION

[0040] The utility model will be further described in detail below in combination with examples.

[0041] Those skilled in the art will understand that the following examples are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. If the specific technology or condition is not specified in the examples, it is carried out according to the technology or condition described in the literature in the art or according to the product manual. If the manufacturer of the material or equipment is not specified, it is a conventional product that can be obtained by purchase.

[0042] Those skilled in the art will understand that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should further be understood that the word "comprising" as used in the specification herein is used to mean the presence of steps, integers, operations, elements, and / or components, but not to the exclusion of one or more other steps, integers, operations, elements, components, and / or groups thereof that are present or added.

[0043] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. The orientation or state relationship indicated by the terms "inner", "upper", "lower" and the like is based on the orientation or state relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "provided with" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application should be understood according to the specific circumstances.

[0045] Those skilled in the art will understand that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as that generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless otherwise defined.

[0046] Example 1

[0047] As Figure 1As shown, the embodiment provides an aerosol generating article containing aerosol generating particles with a coating layer, which comprises an outer tube 1, and aerosol generating particles with a coating layer 2, a blocking piece 3 and a filter piece 5 located in the outer tube 1; the aerosol generating particles with a coating layer 2 are further provided with a sealing piece 6 upstream;

[0048] The aerosol generating particles with a coating layer 2 are of a core-shell structure, the core is the aerosol generating particle body 21, and the shell is the coating layer 22 covering the outer surface of the aerosol generating particle body.

[0049] The blocking piece 3 and the filter piece 5 further comprise an empty tube piece 4 therebetween.

[0050] The material of the coating layer 22 comprises ethyl cellulose.

[0051] The mass of the coating layer 22 accounts for 5% of the mass of the aerosol generating particle body 21.

[0052] A preparation method of an aerosol generating article containing aerosol generating particles with a coating layer, which comprises the following steps:

[0053] S1, preparing an aerosol generating particle body;

[0054] S2, preparing a coating material mixture;

[0055] S3, placing the aerosol generating particle body obtained in step S1 into a coating device, and uniformly attaching the coating material mixture obtained in step S2 to the surface of the aerosol generating particle body by spraying, so as to form a continuous, dense and durable coating film;

[0056] S4, after the coating is completed, drying the aerosol generating particle body with the coating material, so as to solidify and tightly attach the coating layer to the aerosol generating particle body, and obtain the aerosol generating particles with a coating layer. This step helps to improve the stability and durability of the coating layer.

[0057] S5, filling the aerosol generating particles with a coating layer into an outer tube 1 filled with a blocking piece 3, an empty tube piece 4 and a filter piece 5, and then setting the sealing piece 6, so as to obtain the aerosol generating article containing aerosol generating particles with a coating layer.

[0058] In step S2, the method for preparing the coating material is as follows: adding the main body of the coating material into a solvent and stirring, so as to prepare a coating material mixture with a mass concentration of 5%.

[0059] The main body of the coating material includes but is not limited to ethyl cellulose, shellac and carnauba wax, and the solvent includes alcohol, such as anhydrous ethanol.

[0060] In step S3, the coating process is performed with spraying and stirring for 10 minutes.

[0061] In step S4, the drying conditions after the coating process include drying in an oven or drying in dry air. The drying in the oven is performed by placing the coated aerosol generating particles in an oven at 60°C for 10 minutes. The drying in dry air is performed by placing the coated aerosol generating particles in dry air at 60°C for 5 minutes.

[0062] Between step S4 and step S5, there is a process of sizing the particles. The process is performed by placing the coated aerosol generating particles on a vibrating device and starting the vibrating device to loosen the particles. The process of sizing the particles has the following effects: 1. It helps to disperse the particles and ensure good flowability of the particles during the filling process, so that the particles can be uniformly and continuously filled into the cigarette. 2. It removes impurities and agglomerates. The process of sizing the particles is an important step in the manufacturing process of the cigarette, which directly affects the quality and taste of the cigarette.

[0063] The vibrating device includes a vibrating screen.

[0064] The sealing member 6 is a sealing film attached to the end of the outer tube.

[0065] It has been verified that, after the coating process, the aerosol generating particles placed in a temperature of 25°C and a humidity of 60% for 15 days do not agglomerate and still have good flowability, while the aerosol generating particles without coating have obvious agglomeration.

Claims

1. An aerosol-generating article comprising aerosol-generating particles having a coating layer, characterized in that It comprises an outer tube (1), and aerosol-generating particles with a coating layer (2), a blocking member (3) and a filter (5) located inside the outer tube (1); a sealing member (6) is also provided upstream of the aerosol-generating particles with a coating layer (2); The aerosol-generating particle with a coating layer (2) is a core-shell structure, wherein the core is the aerosol-generating particle body (21), and the shell is the coating layer (22) covering the outer surface of the aerosol-generating particle body.

2. An aerosol-generating article comprising aerosol-generating particles having a coating layer according to claim 1, characterized in that An empty pipe member (4) is also included between the blocking member (3) and the filter member (5), and the empty pipe member (4) is provided with a vent hole penetrating the outer pipe (1) and the wall of the empty pipe member (4).

3. An aerosol-generating article comprising aerosol-generating particles having a coating layer according to claim 1, wherein The materials of the coating layer (22) include ethyl cellulose, shellac, and carnauba wax.

4. An aerosol-generating article comprising aerosol-generating particles having a coating layer according to claim 1, wherein The mass of the coating layer (22) accounts for 5-30% of the mass of the aerosol-generating particle body (21).

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