A composite paper having an adsorption layer disposed in a region and an aerosol generating article including the same

Abstract

This invention discloses a composite paper material with adsorption layers arranged in different regions, comprising a paper layer (1) and an adsorption layer (2). A portion of the paper layer (1) has the adsorption layer (2), while the remaining portion is a non-adsorption layer region. The adsorption layer (2) contains porous materials and a binder. The adsorption layer (2) is a different color from the paper layer (1). This composite paper material with adsorption layers arranged in different regions, when rolled into an aerosol generating matrix rod, has a tobacco rod (4) located in the non-adsorption layer region of the composite paper material. The adsorption layer (2), after being formed into a tube, serves as a support component. Adding a filter component (7) yields an aerosol generating product with a simple structure.

Description

Technical Field

[0001] This invention relates to the field of heated non-combustible cigarette technology, specifically to a composite paper material with adsorption layers arranged in different regions and an aerosol-generating product containing the same. Background Technology

[0002] As consumers become increasingly health-conscious and demand more personalized experiences with cigarette products, the tobacco industry is constantly responding to these evolving needs by developing various smoking products with reduced tar and harm reduction features. Among these, heated cigarettes, due to their unique heating method compared to traditional cigarettes, offer a healthier smoking experience while satisfying consumers' sensory needs.

[0003] To increase the smoke volume and reduce the temperature of aerosol-generated products, hollow tubes are typically incorporated into these products as a cavity structure. Furthermore, to enhance the aroma enhancement effect of this section, flavoring agents are coated onto the inner wall of the hollow tube or filled into the cavity. However, this method suffers from uneven aroma release; the aroma cannot be released gradually during inhalation, resulting in a strong aroma in the early stages but a lack of fragrance in the later stages. Therefore, a solution for achieving gradual aroma enhancement within the hollow tube section is desired.

[0004] Furthermore, in existing technologies, the smoke-generating material for granular heated cigarettes is typically loose tobacco granules. Since these loose granules cannot be fixed, they must be filled into the outer tube using a filling method. This filling method limits production to batch filling only for individual tubes, resulting in low production efficiency. In addition to the need to fill the smoke-generating section with granules, granular heated cigarettes also involve pressing filter material into a paper tube to form a filter section. This means that each production stage of granular heated cigarettes is inefficient, relatively independent, and discontinuous, making assembly line production impossible. Moreover, the tobacco granule sections require sealing paper and plugs to fix the granules, leading to a high defect rate.

[0005] To address the issue of loose tobacco particles, some researchers have used adhesives to bond loose tobacco particles together to form a cylindrical core rod. This core rod is then wrapped in cigarette paper and used as a standalone aerosol-generating matrix. It is then combined with other components through filling, rolling, or lamination processes to create aerosol-generating products. Because this smoking section is already a single, cylindrical core rod, the problem of tobacco particles falling and scattering is eliminated, thus eliminating the need for sealing films or plugs on both sides of the smoking section. Furthermore, the filling method is not limited when combining it with other components to create aerosol-generating products.

[0006] Currently, the method for preparing cylindrical tobacco core rods by bonding loose tobacco particles with hot melt adhesive involves directly placing the loose tobacco particles into a mixer, adding a large amount of adhesive to the mixer, mixing them evenly, extruding or molding them, wrapping the tobacco core rod with cigarette paper, and using it as an aerosol generating matrix rod. Then, it is combined with other components through filling, rolling, or composite processes to produce aerosol generating products. This method of preparing tobacco core rods has two main problems. Firstly, the tobacco core rods have low porosity: 1. Due to the large amount of coating material added during the mixing process, after cooling, the cooled coating material remains in the gaps between adjacent tobacco particles, resulting in low porosity and low axial air permeability. 2. If less coating material is added during mixing to avoid the first problem, the coating material will be unevenly dispersed, and adjacent tobacco particles without coating will not adhere, leading to particle scattering. 3. A more critical issue is that adding a large amount of coating material results in a significant coating layer on the surface of each tobacco particle, severely affecting the release of aerosols after heating. Essentially, the purpose of the coating layer is only to help scattered tobacco particles adhere, but it is undesirable for unadhesive areas to be covered by the coating material, thus hindering aerosol release. The second aspect is the time-consuming and labor-intensive problem of rolling cigarette paper after extrusion or molding: 1. If extrusion is used, an extrusion device is required, while molding requires a demolding process; 2. After the tobacco stick is formed, a rolling process is required, that is, forming the stick and rolling are two steps, which is time-consuming and labor-intensive.

[0007] Therefore, how to bind loose tobacco particles together to form a smoking stick, and how to complete the stick forming and rolling in one step, is a concern.

[0008] To address the above problems, this invention is proposed. Summary of the Invention

[0009] The first aspect of the present invention provides a composite paper material with a regionally arranged adsorption layer, comprising a paper layer 1 and an adsorption layer 2, wherein a portion of the upper region of the paper layer 1 has the adsorption layer 2, and the remaining region is a non-adsorption layer region, and the adsorption layer 2 comprises a porous material and an adhesive; the adsorption layer 2 is a different color from the paper layer 1.

[0010] Preferably, the axial length of the adsorption layer 2 is 1 / 5 to 1 / 2 of the axial length of the paper layer 1.

[0011] Preferably, the non-absorbent layer region of the paper layer 1 has an impermeable layer and / or a thermally conductive layer. The impermeable layer and / or thermally conductive layer includes a waterproof layer and / or an oil-resistant layer and / or a thermally conductive layer;

[0012] The waterproof layer uses a mixture of alkyl ketene dimer AKD, cationic rosin, or iron-free aluminum sulfate, and paraffin wax. The oil-resistant layer uses a mixture of fluorocarbons, modified starch, AKD, and paraffin wax, or a mixture of AKD and modified starch. The thermally conductive layer is selected from, but is not limited to, an aluminum foil layer, which is added to the inner wall of the cigarette tube by adhesive bonding. The aluminum foil layer can serve as a waterproof and / or oil-resistant layer, and at the same time, it also has a thermally conductive and heat-insulating function, so that the smoking material on the inner wall of the cigarette is heated evenly.

[0013] Preferably, the waterproof layer and / or oil-proof layer are applied to the inner wall of the cigarette paper tube by spraying.

[0014] During cigarette storage, moisture from the smoking material seeps to the outside of the cigarette paper tube, causing yellow stains. Therefore, a waterproof layer needs to be added to the inner wall of the cigarette paper tube containing the smoking material. The waterproof layer uses a mixture of alkyl ketene dimer (AKD), cationic rosin, or iron-free aluminum sulfate, along with paraffin wax, to prevent moisture from the smoking material from seeping to the outside of the cigarette paper tube.

[0015] Similarly, smoking materials contain smoking agents, flavorings, and fragrances. Over time, the smoking agents, carrying flavorings and fragrances, can seep into the outer wall of the cigarette tube, causing yellow spots and affecting its appearance. Since the smoking agents are oily, an oil-resistant layer needs to be added to the inner wall of the cigarette tube filled with these materials. This oil-resistant layer uses a mixture of fluorocarbons, modified starch, AKD, and paraffin wax. The mixture of AKD and modified starch prevents the smoking agents, carrying flavorings and fragrances, from seeping into the outer wall of the tube, thus preventing yellow spots.

[0016] Preferably, the porous material is in powder form with a mesh size of 80-1000 mesh, and the porous material is selected from activated carbon.

[0017] Preferably, the method for preparing the composite paper material is as follows: first, the paper layer 1 is prepared, and then a mixture containing porous materials and adhesives is coated onto a portion of the paper layer 1 by calendering and coating; or, during the papermaking process in the preparation of the paper layer 1, the mixture containing porous materials and adhesives is coated onto a portion of the paper layer 1.

[0018] Preferably, the amount of the adsorption layer 2 applied to the paper layer 1 is 20-90 g / cm². 3As can be seen from the amount applied, the adsorption layer on the composite paper of this invention is not a thin layer, but has a certain thickness. The porous material in the adsorption layer can adsorb functional substances such as fragrances, tobacco extracts, or smoking agents. Since the functional substances are adsorbed into the interior of the adsorption layer, they can be slowly released during the inhalation process, ensuring that the aroma is consistent before and after inhalation.

[0019] Preferably, the adhesive is selected from one or more of CMC, CM80, chitosan, hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, and guar gum.

[0020] Preferably, the adsorption layer 2 further includes flavorings and / or tobacco extracts and / or smoking agents. The flavorings and / or tobacco extracts and / or smoking agents are pre-adsorbed onto the porous material, and the porous material with these adsorbed substances is then used to form the adsorption layer.

[0021] A second aspect of the present invention provides an aerosol generating matrix rod, which includes a composite tube 3 rolled from the composite paper material described in the first aspect of the present invention, and a tobacco rod 4 located inside the composite tube 3.

[0022] The tobacco stick 4 is located in the non-absorbent layer area of ​​the composite paper, and the absorbent layer 2 faces the cavity of the composite tube 3.

[0023] A third aspect of the present invention provides an aerosol generating article comprising an outer tube 5, a filter element 7 located within the outer tube 5, and the aerosol generating matrix rod provided in the second aspect of the present invention, wherein the composite tube 3 contains one end of the adsorption layer 2 near the filter element 7.

[0024] Preferably, the adsorption layer 2, after being formed into a tube, serves as a support component. The non-adsorption layer area, after being formed into a tube, serves as the outer wrapping component for the tobacco stick.

[0025] Preferably, a cavity structure 6 is further provided between the composite tube 3 and the filter component 7;

[0026] The cavity structure 6 also contains functional materials; and / or,

[0027] The cavity structure 6 also includes a hollow tube functional component 8. The hollow tube functional component 8 can be an ordinary paper tube, or a paper tube formed by rolling a composite paper material with an absorbent layer according to the present invention.

[0028] Preferably, the outer tube 5 has a vent hole 31 that radially penetrates the outer tube 5. When the cavity structure has a hollow tube functional component, the vent hole penetrates both the outer tube and the hollow tube functional component. The purpose of the vent hole is to introduce air into the aerosol generating product, thereby reducing the temperature of the aerosol and the suction resistance. Therefore, the need for a vent hole is determined based on the actual aerosol temperature and suction resistance. The vent hole can be located on the supporting component or on the cooling component (i.e., the cavity structure) in the axial direction. When a vent hole is required, it is preferable to punch a hole to form the vent hole. However, it is also possible to use breathable paper as the outer tube instead of punching a hole, as long as it allows air to be introduced into the aerosol generating product.

[0029] A fourth aspect of the present invention provides a method for preparing an aerosol generating matrix rod, comprising the following steps:

[0030] (A) In an environment with a humidity of less than 15%, a coating layer is applied to the surface of tobacco particles to obtain tobacco particles with a coating layer.

[0031] (B) In an environment with a humidity greater than 60%, a composite paper material is placed on a conveyor belt N1. Then, a feeding device N4 places tobacco particles with a coating layer onto the upstream end of the non-absorbent layer area of ​​the composite paper material. The downstream end of the composite paper material has a closing device N2. As the conveyor belt N1 runs, the composite paper material carrying the tobacco particles with a coating layer runs from the upstream end to the downstream end. During the running process, the coating layer is activated, which binds the tobacco particles together. The composite paper material is then rolled into a tobacco stick 4 at the closing device N2. The absorbent layer 2 is rolled into a paper tube.

[0032] In step (B), the feeding device N4 has a color recognition mechanism N5, which can determine whether the composite paper material below the feeding port is in the adsorption layer 2 area or the non-adsorption layer area by recognizing the color. When the area below the feeding port is the non-adsorption layer area, the material is fed, and when the area below the feeding port is the adsorption layer 2 area, the material is not fed, thereby obtaining an aerosol generating matrix rod with one section being a tobacco rod 4 and the other section being an adsorption layer 2 rolled paper tube.

[0033] Preferably, the coating layer is selected from one or more of hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, and guar gum.

[0034] Preferably, the method for forming a coating layer on the surface of tobacco particles in step (A) is as follows: tobacco particles are added to a mixing tank, and the coating material is sprayed while stirring. After stirring for 5-25 minutes, the spraying of the coating material is stopped, and stirring is continued for another 5-20 minutes. Then, the tobacco particles with the coating material on their surface are conveyed to a fluidized bed and dried with cold air for 5-10 minutes until the coating material is dry on the surface of the tobacco particles and forms a coating layer. The coating material accounts for 40-75% of the weight of the tobacco particles.

[0035] In step (A), tobacco extract, smoke-generating agent, flavorings, and tobacco particles and coating materials can also be added to the mixing tank and stirred together. Adding tobacco extract, smoke-generating agent, and flavorings can further increase the amount of smoke, smoke concentration, and aroma, thereby improving the quality of the smoke.

[0036] The porosity of the tobacco stick is 40-80%.

[0037] Preferably, the conveyor belt N1 is further provided with a steam application device N3 to provide an environment with a humidity greater than 60%.

[0038] Whether or not a steam application device is installed during actual production depends on the specific circumstances. If the water vapor in the ambient air is sufficient to activate the coating layer on the surface of the tobacco particles and the adhesiveness is sufficient to bind the loose smoke particles together, there is no need to install an additional steam application device. If the amount of water vapor in the ambient air is insufficient, an additional steam application device can be installed to provide water vapor and ensure ambient humidity.

[0039] Controlling the ambient humidity requires matching it with the conveyor belt speed and the distance between the upstream discharge point and the downstream closing point. These three factors work together to ensure that the tobacco particles are bonded into rods by the time they reach the downstream closing device. If the particles are still loose and not bonded by the time they reach the downstream closing device, this can be addressed by extending the distance between the upstream discharge point and the downstream closing point, reducing the conveyor belt speed, or increasing the ambient humidity to ensure the bulk tobacco particles are bonded into rods.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. In this invention, the composite paper material is divided into regions with adsorption layers, and the adsorption layers 2 are different in color from the paper layer 1. The feeding device N4 has a color recognition mechanism N5, which can determine whether the composite paper material below the feeding port is in the adsorption layer 2 region or the non-adsorption layer region by recognizing the color. When the region below the feeding port is the non-adsorption layer region, the material is fed; when the region below the feeding port is the adsorption layer 2 region, the material is not fed. This results in an aerosol generating matrix rod consisting of a tobacco rod 4 and an adsorption layer 2 rolled into a paper tube. In other words, after being rolled into an aerosol generating matrix rod, the tobacco rod 4 is located in the non-adsorption layer region of the composite paper material, and the adsorption layer 2, after being rolled into a tube, serves as a support component. By adding a filter component 7, an aerosol generating product can be obtained, resulting in a simple structure.

[0042] 2. If conventional methods are used to first extrude or mold tobacco briquettes after coating them with a coating layer, and then roll them into cigarette paper, this requires two steps, which is time-consuming and labor-intensive. Since the coating material is very sensitive to humidity, the moisture in the air can activate it and increase its viscosity. If the coated tobacco briquettes are not immediately rolled into briquettes after coating, they need to be sealed and stored under strict conditions, which can easily lead to material waste due to improper storage. This invention directly feeds the coated tobacco briquettes into the briquettes after coating, rolling and bonding them into briquettes simultaneously. That is, during the rolling process, the force of the cigarette paper at the end of the briquettes forms the tobacco briquettes into briquettes, completing both the briquette-forming and rolling processes in one step, saving time and labor, and resulting in a high yield.

[0043] 3. This invention controls the flowability of coated tobacco particles by regulating the adhesive force of the coating layer through humidity control. In a dry environment with humidity less than 15%, the coating layer has no adhesive force, and the coated tobacco particles are completely loose and flowable, allowing for the feeding process. However, when the humidity exceeds 60%, the coating layer deliquesces and becomes more viscous, binding the loose tobacco particles into a smoking body, at which point the tobacco particles become non-flowable. Furthermore, the deliquescence of the coating layer is irreversible. Once the coating layer has increased its viscosity and bound the loose tobacco particles into a smoking body, it will not lose its adhesiveness and revert to its original shape even if the humidity decreases.

[0044] 4. In this invention, the adsorption layer 2 of the composite paper material, after being formed into a tube, serves as a supporting component. The adsorption layer on the composite paper material is not a thin layer, but has a certain thickness. The adsorption layer can adsorb more functional substances such as fragrances, tobacco extracts, or smoking agents. Since the fragrances, tobacco extracts, or smoking agents are adsorbed into the interior of the porous material of the adsorption layer, they can be slowly released during the inhalation process, ensuring consistent aroma before and after inhalation. Attached Figure Description

[0045] Figure 1A schematic diagram of the structure of a composite paper material with adsorption layers set in different areas.

[0046] Figure 2 A diagram illustrating the process of forming and rolling aerosol-generated matrix rods.

[0047] Figure 3 Example 1: Schematic diagram of a three-section cigarette structure.

[0048] Figure 4 Example 2: Schematic diagram of a four-segment cigarette structure with a cavity.

[0049] The names of the reference numerals in the figure description are as follows: 1-paper layer, 2-absorbent layer, 3-composite tube, 4-tobacco stick, 5-outer tube, 6-cavity structure, 7-filter component, 8-cavity tube functional component, 31-ventilation hole;

[0050] N1 - Conveyor belt, N2 - Closing device, N3 - Steam application device, N4 - Unloading device, N5 - Color recognition mechanism. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the embodiments.

[0052] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product instructions. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.

[0053] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated 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 an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.

[0054] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. The terms "inner," "upper," "lower," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0057] Example 1

[0058] This embodiment provides a three-stage aerosol generating product, including an outer tube 5, a filter element 7 and an aerosol generating matrix rod located inside the outer tube 5, and the composite tube 3 contains an adsorption layer 2 with one end close to the filter element 7.

[0059] Preferably, the adsorption layer 2, after being formed into a tube, serves as a support component. The non-adsorption layer area, after being formed into a tube, serves as the outer wrapping component for the tobacco stick.

[0060] The outer tube 5 has a vent hole 31 that extends radially through the outer tube 5. The vent hole is located on the support component in the axial direction.

[0061] The aerosol generating matrix rod includes a composite tube 3 made of composite paper and a tobacco rod 4 located inside the composite tube 3;

[0062] The tobacco stick 4 is located in the non-absorbent layer area of ​​the composite paper, and the absorbent layer 2 faces the cavity of the composite tube 3.

[0063] The composite paper material with adsorption layers in different areas includes a paper layer 1 and an adsorption layer 2. The upper part of the paper layer 1 has the adsorption layer 2, and the remaining area is a non-adsorption layer area. The adsorption layer 2 contains porous materials and binders. The adsorption layer 2 is a different color from the paper layer 1.

[0064] The axial length of the adsorption layer 2 is 1 / 3 of the axial length of the paper layer 1.

[0065] The non-absorbent layer region of the paper layer 1 has an anti-seepage layer.

[0066] The porous material is in powder form with a mesh size of 80-1000 mesh, and the porous material is selected from activated carbon.

[0067] The method for preparing the composite paper material is as follows: first, paper layer 1 is prepared, and then a mixture containing porous material and adhesive is coated onto a portion of the paper layer 1 by calendering coating.

[0068] The area where the adsorption layer 2 is applied, wherein the amount of adsorption layer 2 applied to the paper layer 1 is 40 g / cm². 3 .

[0069] The adhesive is selected from CMC.

[0070] The adsorption layer 2 also includes fragrances and flavorings.

[0071] The preparation method of the aerosol generating matrix rod in this embodiment includes the following steps:

[0072] (A) In an environment with a humidity of less than 15%, a coating layer is applied to the surface of tobacco particles to obtain tobacco particles with a coating layer.

[0073] (B) In an environment with a humidity greater than 60%, a composite paper material is placed on a conveyor belt N1. Then, a feeding device N4 places tobacco particles with a coating layer onto the upstream end of the non-absorbent layer area of ​​the composite paper material. The downstream end of the composite paper material has a closing device N2. As the conveyor belt N1 runs, the composite paper material carrying the tobacco particles with a coating layer runs from the upstream end to the downstream end. During the running process, the coating layer is activated, which binds the tobacco particles together. The composite paper material is then rolled into a tobacco stick 4 at the closing device N2. The absorbent layer 2 is rolled into a paper tube.

[0074] In step (B), the feeding device N4 has a color recognition mechanism N5, which can determine whether the composite paper material below the feeding port is in the adsorption layer 2 area or the non-adsorption layer area by recognizing the color. When the area below the feeding port is the non-adsorption layer area, the material is fed, and when the area below the feeding port is the adsorption layer 2 area, the material is not fed, thereby obtaining an aerosol generating matrix rod with one section being a tobacco rod 4 and the other section being an adsorption layer 2 rolled paper tube.

[0075] The coating layer is selected from hydroxypropyl methylcellulose.

[0076] The method for forming a coating layer on the surface of tobacco particles in step (A) is as follows: tobacco particles are added to a mixing tank, and the coating material is sprayed while stirring. After stirring for 15 minutes, the spraying of the coating material is stopped, and stirring is continued for 10 minutes. Then, the tobacco particles with the coating material on their surface are transported to a fluidized bed and dried with cold air for 10 minutes until the coating material is dry on the surface of the tobacco particles and forms a coating layer. The coating material accounts for 70% of the weight of the tobacco particles.

[0077] The porosity of the tobacco stick is 70%.

[0078] Above the conveyor belt N1 is a steam application device N3, used to provide an environment with humidity greater than 60%.

[0079] Example 2

[0080] The difference between the four-stage aerosol generator product in this embodiment and that in Example 1 is:

[0081] The composite tube 3 and the filter component 7 also have a cavity structure 6;

[0082] The cavity structure 6 also contains functional materials; and / or,

[0083] The cavity structure 6 also includes a hollow tube functional component 8.

[0084] The outer tube 5 has a vent 31 that extends radially through the outer tube 5. The vent is located axially in the cavity structure.

Claims

1. An aerosol-generating product, characterized in that, It includes an outer tube (5), and a filter element (7) and an aerosol generating matrix rod located within the outer tube (5); The aerosol generating matrix rod includes a composite tube (3) made of composite paper with adsorption layers set in different regions, and a tobacco rod (4) located inside the composite tube (3). The composite paper material includes a paper layer (1) and an adsorption layer (2). The upper part of the paper layer (1) has the adsorption layer (2), and the remaining part is a non-adsorption layer area. The adsorption layer (2) contains porous material and binder. The adsorption layer (2) is different in color from the paper layer (1). The axial length of the adsorption layer (2) is 1 / 5 to 1 / 2 of the axial length of the paper layer (1). The tobacco stick (4) is located in the non-absorbent layer area of ​​the composite paper, and the absorbent layer (2) faces the cavity of the composite tube (3); The composite tube (3) contains the adsorption layer (2) at one end, which is close to the filter element (7). The adsorption layer (2) is formed into a tube and serves as a support component, while the non-adsorption layer area is formed into a tube and serves as an outer wrapping component for the tobacco stick. The preparation method of the aerosol generating matrix rod includes the following steps: (A) In an environment with a humidity of less than 15%, a coating layer is applied to the surface of tobacco particles to obtain tobacco particles with a coating layer. (B) In an environment with a humidity greater than 60%, composite paper is placed on a conveyor belt (N1), and then a feeding device (N4) places tobacco particles with a coating layer on the upstream end of the non-absorbent layer area of ​​the composite paper. The downstream end of the composite paper has a closing device (N2). As the conveyor belt (N1) runs, the composite paper carrying tobacco particles with a coating layer runs from the upstream end to the downstream end. During the running process, the coating layer is activated, which binds the tobacco particles together. The composite paper is then rolled into a tobacco stick (4) at the closing device (N2), and the absorbent layer (2) is rolled into a paper tube. In step (B), the feeding device (N4) has a color recognition mechanism (N5), which determines whether the composite paper material below the feeding port is in the adsorption layer (2) area or the non-adsorption layer area by recognizing the color. When the area below the feeding port is the non-adsorption layer area, the material is fed, and when the area below the feeding port is the adsorption layer (2) area, the material is not fed, thereby obtaining an aerosol generating matrix rod with one section being a tobacco rod (4) and the other section being an adsorption layer (2) rolled paper tube.

2. The aerosol-generating product according to claim 1, characterized in that, The non-absorbent layer region of the paper layer (1) has an anti-seepage layer and / or a thermally conductive layer; The porous material is in powder form with a mesh size of 80-1000 mesh, and the porous material is selected from activated carbon; The method for preparing the composite paper is as follows: first, the paper layer (1) is prepared, and then a mixture containing porous materials and adhesives is coated onto a portion of the paper layer (1) by calendering and coating; or, during the papermaking process in the preparation of the paper layer (1), the mixture containing porous materials and adhesives is coated onto a portion of the paper layer (1). The area where the adsorption layer (2) is applied, wherein the amount of the adsorption layer (2) applied to the paper layer (1) is 20-90 g / cm. 3 ; The adhesive is selected from one or more of CMC, chitosan, hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, and guar gum; The adsorption layer (2) also includes flavorings and / or tobacco extracts and / or smoke generators.

3. The aerosol-generating product according to claim 1, characterized in that, The composite tube (3) and the filter component (7) also have a cavity structure (6). The cavity structure (6) also contains functional materials; and / or, The cavity structure (6) also contains a hollow tube functional component (8).

4. The aerosol-generating product according to claim 1, characterized in that, The outer tube (5) has a vent hole (31) that penetrates the outer tube (5) radially.

5. The aerosol-generating product according to claim 1, characterized in that, The coating layer is selected from one or more of hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, polyvinyl alcohol, and guar gum.

6. The aerosol-generating product according to claim 1, characterized in that, The method for forming a coating layer on the surface of tobacco particles in step (A) is as follows: Tobacco particles are added to a mixing tank, and the coating material is sprayed while stirring. After stirring for 5-25 minutes, the spraying of the coating material is stopped, and stirring continues for another 5-20 minutes. Then, the tobacco particles with the coating material on their surface are conveyed to a fluidized bed and dried with cold air for 5-10 minutes until the coating material is dry on the surface of the tobacco particles and forms a coating layer. The coating material accounts for 40-75% of the weight of the tobacco particles. In step (A), tobacco extract, smoke-generating agent, flavoring and fragrance, tobacco particles and coating material are added to the mixing tank and mixed together. The porosity of the tobacco stick is 40-80%.

7. The aerosol-generating product according to claim 1, characterized in that, Above the conveyor belt (N1) is a steam application device (N3) for providing an environment with a humidity greater than 60%.

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