Aerosol-generating article comprising disordered aerosol-generating substrate having coating layer

Abstract

The utility model discloses an aerosol generating product containing a disordered aerosol generating substrate with a coating layer. The aerosol generating product comprises outer wrapping paper (1), and an aerosol generating substrate (2), a supporting piece (3), a composite cooling filter piece (4) and an end cavity piece (5) which are positioned in the outer wrapping paper (1), the aerosol generating substrate (2) is mixed tobacco shreds which are arranged disorderly, and each mixed tobacco shred comprises a mixed tobacco shred body and a coating layer wrapping the outer surface of the mixed tobacco shred body. According to the utility model, the surfaces of the mixed tobacco shreds obtained by mixing reconstituted tobacco and natural tobacco raw materials are coated, and the coating layers on the surfaces of the mixed tobacco shreds can improve the physical strength of the mixed tobacco shreds from multiple aspects, so that the problems that the filling amount of the mixed tobacco shreds is difficult to control, the breakage rate of the tobacco shreds is high, and the end part of a tobacco core section is easy to fall off are solved.

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 a disordered aerosol-generating matrix with a coating layer. Background Art

[0002] As consumers become more aware of health issues and demand a personalized experience in cigarettes, the tobacco industry has continuously responded to these evolving needs by developing a variety of smoking products with reduced tar content and harm reduction. Heat-not-burn (HTB) cigarettes, as a new tobacco product, have garnered extensive attention and research within the industry in recent years. The core of these products lies in the tobacco core segment, which, through heating, produces aroma and smoke, directly determining the style, characteristics, and quality of HNB cigarettes. Consequently, the shaping method of the tobacco core segment has become a hot topic of research.

[0003] Currently, in addition to pellet-type heat-not-burn cigarettes, there are two other methods for forming the core segments of heated cigarettes: a sequential process and a random process. The sequential process primarily involves preparing thin sheets of reconstituted tobacco leaves, extracting a smoke-generating agent, and drying them before cutting them into reconstituted tobacco shreds of a certain width and gathering them together to form the shredded tobacco. The random process involves mixing reconstituted tobacco and natural tobacco leaves, producing shredded tobacco leaves, extracting a smoke-generating agent, and drying them before rolling them using a modified traditional rolling and splicing machine. While both sequential and random processes offer greater flexibility and adaptability, they also present numerous technical challenges.

[0004] First, after absorbing the smoke-generating agent, the mixed tobacco produced in the disordered processing process significantly reduces its physical strength, causing it to become soft. Furthermore, during the preparation and storage process, the smoke-generating agent within the tobacco can easily seep out to the tobacco surface. In high humidity environments, the mixed tobacco can easily absorb moisture from the air. These factors can significantly reduce its physical strength and cause it to become soft. This reduced physical strength of the mixed tobacco can lead to the following problems: 1. It is difficult to control the filling amount of the mixed tobacco. If the filling amount is too small, the tobacco core segment will appear too soft, affecting the smoking experience. If the filling amount is too large, the tobacco will be too densely packed, increasing draw resistance and also affecting the smoking effect. 2. Due to the low physical strength of the mixed tobacco, the tobacco fragmentation rate will also increase, making it easy for the tobacco core segment to fall off. This not only affects the appearance quality of the cigarette, but can also cause the tobacco to scatter during smoking, affecting the smoking experience. 3. Furthermore, the absorption of moisture from the air by the mixed tobacco can also reduce the smoke volume of the mixed tobacco and increase the smoke temperature.

[0005] Secondly, during the storage and transportation of mixed tobacco in the disordered processing technology, the smoke-generating agent easily seeps into 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 mixed tobacco, 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.

[0006] In summary, while the random processing technology offers certain advantages in forming heated cigarette core segments, it also presents numerous technical challenges that need to be addressed. Therefore, developing a novel heated cigarette core segment forming method that can maintain the physical strength of the blended cut tobacco while effectively preventing the leakage of the smoking agent is crucial for improving the quality and smoking experience of heated cigarettes.

[0007] In order to solve the above problems, the present utility model is proposed. Utility Model Content

[0008] In response to the above-mentioned shortcomings, the present invention proposes an aerosol-generating product comprising a disordered aerosol-generating matrix with a coating layer and a preparation method thereof. The aerosol-generating product comprises an outer wrapping paper 1, and an aerosol-generating matrix 2, a support member 3, a composite cooling filter 4, and an end cavity member 5 located within the outer wrapping paper 1. The aerosol-generating matrix 2 is a disordered mixed tobacco shred, and the mixed tobacco shred comprises a mixed tobacco shred body and a coating layer coated on the outer surface of the mixed tobacco shred. The present invention coats the surface of the mixed tobacco shred, which is obtained by mixing reconstituted tobacco leaves and natural tobacco leaves. The coating layer on the surface of the mixed tobacco shred can improve the physical strength of the mixed tobacco shred in multiple ways, thereby resolving the problems of difficult to control the filling amount of the mixed tobacco shred, high tobacco shred rate, and the tendency for tobacco shreds to fall off at the end of the core segment.

[0009] In a first aspect, the present invention provides an aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer, comprising an outer wrapping paper 1, and an aerosol-generating substrate 2, a support member 3, a composite cooling filter member 4, and an end cavity member 5 located within the outer wrapping paper 1;

[0010] The composite cooling filter element 4 includes a hollow cooling element 41 and a filter element 42. The outer sides of the hollow cooling element 41 and the filter element 42 are wrapped with a forming paper 43. The outer wrapping paper 1 outside the composite cooling filter element 4 and the end cavity element 5 is wrapped with a tipping paper 6.

[0011] The aerosol generating substrate 2 has cigarette paper 21 on the outside;

[0012] The aerosol generating matrix 2 is disorderly arranged mixed tobacco, and the mixed tobacco includes a mixed tobacco body and a coating layer coated on the outer surface of the mixed tobacco body.

[0013] Preferably, the end cavity member 5 has one or more cavities;

[0014] When there is one cavity, the cavity is located at the central axis; when there are multiple cavities, the cavities are dispersed in the end cavity member 5;

[0015] The end cavity member 5 is an acetate fiber bundle tube, a paper tube or a non-woven fabric tube;

[0016] The axial length of the end cavity part 5 is one to two times the diameter of the end cavity part 5 .

[0017] Preferably, the hollow cooling element 41 has ventilation holes penetrating the tipping paper 6 , the outer wrapping paper 1 , the shaping paper 43 and the tube wall of the hollow cooling element 41 .

[0018] Preferably, the hollow cooling element 41 is a hollow acetate fiber bundle tube, a hollow paper tube or a hollow non-woven fabric tube, and the wall thickness of the hollow cooling element 41 is 0.2-1.2 mm.

[0019] The support member 3 of the present invention can be selected from any conventional support member used in aerosol-generating products in the art. It can be a common hollow tube, such as a hollow acetate fiber bundle tube, a hollow paper tube, or a hollow non-woven fabric tube. Alternatively, it can be a support member having a grooved corrugated layer as the tube wall. The support member 3 can be configured to include a flavoring or smoke-generating component based on actual conditions. The flavoring or smoke-generating component can be formed by directly applying a flavoring or smoke-generating layer to the tube wall, or by adding a flavoring or smoke-generating substance to the lumen of the support section. Examples of flavoring substances include natural incense raw materials and tobacco extracts, while examples of smoke-generating substances include propylene glycol and glycerol.

[0020] The filter element 42 of the present invention is an acetate fiber tow.

[0021] Preferably, the material of the coating layer includes ethyl cellulose, shellac, and carnauba wax.

[0022] Preferably, the mass of the coating layer accounts for 5-30% of the mass of the mixed tobacco.

[0023] A second aspect of the present invention provides a method for preparing an aerosol-generating article comprising the disordered aerosol-generating substrate having a coating layer as described in the first aspect of the present invention, comprising the following steps:

[0024] S1, preparing reconstituted tobacco leaves, then mixing the reconstituted tobacco leaves with natural tobacco leaves and adding the mixture to a shredder to obtain mixed shredded tobacco;

[0025] S2, applying functional additives to the mixed tobacco obtained in step S1 and drying the mixed tobacco; the functional additives include smoke-generating agents, flavors, etc.;

[0026] S3, preparing a coating material mixture;

[0027] S4, placing the mixed tobacco obtained in step S2 into a coating device, and spraying the coating material mixture obtained in step S3 so that the coating material mixture is evenly attached to the surface of the mixed tobacco;

[0028] S5, after the coating is completed, drying the mixed shredded tobacco body with the coating material, so that the coating layer is solidified and tightly adhered to the mixed shredded tobacco body, thereby obtaining mixed shredded tobacco with a coating layer;

[0029] S6, rolling and compounding, using a cigarette machine using cigarette paper 21 to make an aerosol generating matrix 2 from the mixed tobacco with a coating layer obtained in step S4, using a compounding machine using the forming paper 43 to compound the hollow cooling component 41 and the filter component 42 to obtain the composite cooling filter component 4, then using a compounding machine using outer wrapping paper 1 to compound the aerosol generating matrix 2, the support component 3, the composite cooling filter component 4 and the end cavity component 5, finally wrapping the outer wrapping paper 1 on the outside of the composite cooling filter component 4 and the end cavity component 5 with the tipping paper 6 to obtain an aerosol generating product.

[0030] Preferably, in step S3, the method for preparing the coating material is: adding the main body of the coating material into a solvent and stirring to prepare a coating material mixed solution with a mass concentration of 4-15%;

[0031] The coating material includes but is not limited to ethyl cellulose, shellac, and carnauba wax, and the solvent includes alcohols, such as anhydrous ethanol.

[0032] Preferably, in step S4, the coating process is carried out while spraying and stirring for 10-20 minutes.

[0033] Preferably, in step S5, 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.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention coats the surface of mixed tobacco obtained by mixing reconstituted tobacco leaves and natural tobacco leaves. The coating layer on the surface of the mixed tobacco improves the physical strength of the mixed tobacco in three ways. First, the coating layer is applied to the mixed tobacco after it has absorbed a smoke agent and dried. This coating layer improves the physical strength of the mixed tobacco and prevents the mixed tobacco from becoming soft after absorbing the smoke agent. Second, the coating layer prevents the smoke agent (which is only used as an example, but also includes flavorings, etc.) from seeping out of the mixed tobacco body. Third, the coating layer effectively blocks the passage of moisture from the air, isolating the internal mixed tobacco body from the outside world and effectively reducing the hygroscopicity of the mixed tobacco. This avoids the problem of reduced physical strength of the mixed tobacco in these three ways, thereby resolving the problems of difficult to control the filling amount of the mixed tobacco, high tobacco fragmentation rate, and the tendency of tobacco core ends to fall off. Furthermore, by preventing the mixed tobacco from absorbing moisture from the air, the problem of reduced smoke volume and increased smoke temperature of the mixed tobacco is also avoided.

[0036] 2. The coating layer on the surface of the mixed tobacco of the present invention can prevent the smoking agent inside the mixed tobacco from seeping out to the surface of the mixed tobacco, and also avoids the problem of yellow spots caused by the smoking agent seeping out to the cigarette paper. There is no need to set an anti-seepage layer on the cigarette paper, which reduces the requirements for cigarette paper.

[0037] 3. The coating layer on the surface of the mixed tobacco of the present invention can also lock the internal components of the mixed tobacco (such as smoke generating agents, aroma components, etc.), thereby preventing the internal components of the mixed tobacco from volatilizing and dissipating during storage.

[0038] 4. The coating material of the present invention is selected from ethyl cellulose. The coating layer formed by this material can not only effectively prevent the passage of moisture, but also has a certain degree of air permeability. Therefore, when the mixed tobacco body is heated to generate aerosol, the aerosol can still smoothly pass through the coating layer and be gradually released without affecting the smoke output of the mixed tobacco body itself.

[0039] 5. The amount of coating material used in this invention, as well as the preparation conditions during the coating process, ensures uniformity of the coating. The amount and uniformity of the coating significantly influence the volatility. Excessive or uneven coating may hinder the release of volatile substances. However, appropriate coating amount and uniformity ensure that volatile substances can pass smoothly through the coating when heated.

[0040] 6. The utility model sets an end cavity member downstream of the filter element. The end cavity member extends the distance from the aerosol generating matrix section to the mouth end. Therefore, the temperature of the outer surface of the end cavity member is lower than that of the filter element surface, thereby avoiding the problem of the mouth end surface of the aerosol generating product being hot.

[0041] 7. The end cavity of the present invention has an internal air flow channel that minimizes smoke retention. Consequently, smoke stays in the end cavity for a short time, preventing heat transfer from the smoke to the exterior surface, further preventing the mouthpiece from burning. Furthermore, because the end cavity minimizes smoke retention, placing the end cavity downstream of the filter does not significantly increase draw resistance.

[0042] 8. The end cavity part of the utility model is a hollow acetate fiber bundle tube, a hollow paper tube or a hollow non-woven fabric tube. Since it is hollow inside, the material area in contact with the consumer's mouth is reduced, thereby alleviating the consumer's safety concerns.

[0043] 9. In terms of preparation method, the present invention first uses a compounding machine to use the forming paper 43 to compound the hollow cooling element 41 and the filter element 42 to obtain the composite cooling filter element 4, and then uses a compounding machine to use the outer wrapping paper 1 to compound the aerosol generating matrix 2, the support member 3, the composite cooling filter element 4 and the end cavity member 5. The present invention can prepare a five-component aerosol generating product without changing the original four-component compounding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of the structure of an aerosol-generating article comprising a disordered aerosol-generating matrix having a coating layer.

[0045] Names of the reference numerals in the description of the drawings: 1-outer wrapping paper, 2-aerosol generating matrix, 3-support member, 4-composite cooling filter member, 5-end cavity member, 6-tip paper;

[0046] 21-cigarette paper, 41-hollow cooling element, 42-filter element, 43-wrapping paper. DETAILED DESCRIPTION

[0047] The present invention will be described in further detail below with reference to the embodiments.

[0048] Those skilled in the art will understand that the following examples are intended only to illustrate the present invention and should not be construed as limiting the scope of the present invention. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in literature in the art or in accordance with the product specifications were followed. Materials or equipment used, where the manufacturer is not specified, are commercially available conventional products.

[0049] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" to another element, it can be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection.

[0050] In the description of this utility model, unless otherwise specified, "plurality" means two or more. Terms such as "inner," "upper," and "lower" indicating positions or states are based on the positions or states shown in the accompanying drawings and are intended solely to facilitate and simplify the description of this utility model. They do not indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "provided with" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0052] Those skilled in the art will understand that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such herein.

[0053] Example 1

[0054] like Figure 1 As shown, this embodiment provides an aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer, which comprises an outer wrapping paper 1, and an aerosol-generating substrate 2, a support member 3, a composite cooling filter member 4, and an end cavity member 5 located within the outer wrapping paper 1;

[0055] The composite cooling filter element 4 includes a hollow cooling element 41 and a filter element 42. The outer sides of the hollow cooling element 41 and the filter element 42 are wrapped with a forming paper 43. The outer wrapping paper 1 outside the composite cooling filter element 4 and the end cavity element 5 is wrapped with a tipping paper 6.

[0056] The aerosol generating substrate 2 has cigarette paper 21 on the outside;

[0057] The aerosol generating matrix 2 is disorderly arranged mixed tobacco, and the mixed tobacco includes a mixed tobacco body and a coating layer coated on the outer surface of the mixed tobacco body.

[0058] Preferably, the end cavity member 5 has one or more cavities;

[0059] When there is one cavity, the cavity is located at the central axis; when there are multiple cavities, the cavities are dispersed in the end cavity member 5;

[0060] The end cavity member 5 is an acetate fiber bundle tube, a paper tube or a non-woven fabric tube;

[0061] The axial length of the end cavity part 5 is one to two times the diameter of the end cavity part 5 .

[0062] The hollow cooling element 41 is a hollow acetate fiber bundle tube, and the wall thickness of the hollow cooling element 41 is 1.0 mm.

[0063] In this embodiment, the support member 3 is a hollow paper tube.

[0064] In this embodiment, the filter element 42 is made of acetate fiber tow.

[0065] The material of the coating layer includes ethyl cellulose.

[0066] The mass of the coating layer accounts for 10% of the mass of the mixed tobacco.

[0067] The method for preparing the aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer comprises the following steps:

[0068] S1, preparing reconstituted tobacco leaves, then mixing the reconstituted tobacco leaves with natural tobacco leaves and adding the mixture to a shredder to obtain mixed shredded tobacco;

[0069] S2, applying functional additives to the mixed shredded tobacco obtained in step S1 and drying the mixed shredded tobacco; the functional additives include smoke-generating agents and flavorings;

[0070] S3, preparing a coating material mixture;

[0071] S4, placing the mixed tobacco obtained in step S2 into a coating device, and spraying the coating material mixture obtained in step S3 so that the coating material mixture is evenly attached to the surface of the mixed tobacco;

[0072] S5, after the coating is completed, drying the mixed shredded tobacco body with the coating material, so that the coating layer is solidified and tightly adhered to the mixed shredded tobacco body, thereby obtaining mixed shredded tobacco with a coating layer;

[0073] S6, rolling and compounding, using a cigarette machine using cigarette paper 21 to make an aerosol generating matrix 2 from the mixed tobacco with a coating layer obtained in step S4, using a compounding machine using the forming paper 43 to compound the hollow cooling component 41 and the filter component 42 to obtain the composite cooling filter component 4, then using a compounding machine using outer wrapping paper 1 to compound the aerosol generating matrix 2, the support component 3, the composite cooling filter component 4 and the end cavity component 5, finally wrapping the outer wrapping paper 1 on the outside of the composite cooling filter component 4 and the end cavity component 5 with the tipping paper 6 to obtain an aerosol generating product.

[0074] In step S3, the method for preparing the coating material is as follows: adding the main body of the coating material into the solvent and stirring to prepare a coating material mixed solution with a mass concentration of 5%;

[0075] The main body of the coating material includes ethyl cellulose, and the solvent includes anhydrous ethanol.

[0076] In step S4, the coating process is carried out while spraying and stirring, and the duration is 15 minutes.

[0077] In step S5, after the 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 60°C and baking for 15 minutes; the dry air drying conditions are: placing it in dry air at 60°C and air drying for 10 minutes.

Claims

1. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer, characterized in that It comprises an outer wrapping paper (1), and an aerosol generating matrix (2), a supporting member (3), a composite cooling filter member (4), and an end cavity member (5) located within the outer wrapping paper (1); The composite cooling filter element (4) comprises a hollow cooling element (41) and a filter element (42), wherein the outer sides of the hollow cooling element (41) and the filter element (42) are wrapped with a molding paper (43); the outer wrapping paper (1) outside the composite cooling filter element (4) and the end cavity element (5) is wrapped with a tipping paper (6); The aerosol generating substrate (2) has cigarette paper (21) on the outside; The aerosol generating matrix (2) is disorderly arranged mixed tobacco shreds, and the mixed tobacco shreds include a mixed tobacco shred main body and a coating layer coated on the outer surface of the mixed tobacco shred main body.

2. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer according to claim 1, wherein The end cavity member (5) has one or more cavities; When there is one cavity, the cavity is located at the central axis; when there are multiple cavities, the cavities are dispersed in the end cavity member (5); The end cavity member (5) is an acetate fiber bundle tube, a paper tube or a non-woven fabric tube; The axial length of the end cavity part (5) is one to two times the diameter of the end cavity part (5).

3. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer according to claim 1, wherein The hollow cooling element (41) has a ventilation hole that penetrates the tipping paper (6), the outer wrapping paper (1), the shaping paper (43) and the tube wall of the hollow cooling element (41).

4. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer according to claim 1, wherein The hollow cooling element (41) is a hollow acetate fiber bundle tube, a hollow paper tube or a hollow non-woven fabric tube, and the wall thickness of the hollow cooling element (41) is 0.2-1.2 mm.

5. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer according to claim 1, wherein The materials of the coating layer include ethyl cellulose, shellac and carnauba wax.

6. An aerosol-generating article comprising a disordered aerosol-generating substrate having a coating layer according to claim 1, wherein The mass of the coating layer accounts for 5-30% of the mass of the mixed tobacco.

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