A method for completing tobacco rod forming and rolling in one step

Abstract

The invention discloses a method for completing tobacco rod forming and rolling in one step, which comprises the following steps: (A) coating a coating layer on the surface of tobacco particles in an environment with a humidity of less than 15%; (B) placing a composite paper material on a conveyor belt (N1) in an environment with a humidity of more than 60%, and then placing tobacco particles with a coating layer on the upstream end of the composite paper material by a blanking device (N4), and the downstream end of the composite paper material is provided with a closing device (N2), and as the conveyor belt (N1) runs, the composite paper material carrying tobacco particles with a coating layer runs from the upstream end to the downstream end, and during the running process, the coating layer is activated, and the tobacco particles are bonded, and rolled into a tobacco rod (4) through the composite paper material at the closing device (N2). The invention directly blanks the tobacco particles after coating the coating layer on the surface of the tobacco particles, and rolls and bonds them into a rod at the same time, that is, during the rolling process, the tobacco particles are formed into a rod by the closing force of the cigarette paper rolling, and the two steps of forming a rod and rolling are directly completed in one step, which saves time and labor, and has a high yield.

Description

Technical Field

[0001] The invention relates to the technical field of heat-not-burn cigarettes, and in particular to a method for completing tobacco rod forming and rolling in one step and an aerosol generating product comprising the tobacco rod. Background Art

[0002] As consumers pay more attention to health issues and demand more personalized experience in cigarette products, the tobacco industry continues to respond to the upgrading of consumer demand and develop various smoking products with reduced tar and harm. Among them, heated cigarettes are different from traditional cigarette products in that they are heated in a way that satisfies consumers' sensory needs for cigarette products while providing a healthier smoking experience.

[0003] In the prior art, the smoking material of granular heated cigarettes is usually loose tobacco particles. Since loose tobacco particles cannot be fixed, they must be filled into the outer tube by filling. The filling method limits it to batch filling of individual tubes, and the production efficiency is low. In addition, in addition to the canned particles required for the smoking section, granular heated cigarettes are formed by punching filter rod materials in paper tubes to form filter sections. In other words, each production link of granular heated cigarettes is inefficient, and each production link is relatively independent and discontinuous, and cannot form an assembly line production. In addition, the particles on both sides of the tobacco particle segment need to be fixed by sealing paper and sealing parts, and the defective rate is high.

[0004] In order to solve the problem of bulk tobacco particles, some researchers bonded the loose tobacco particles together with adhesives to form a cylindrical cigarette core rod, and then wrapped the cigarette core rod with cigarette paper, and used it alone as an aerosol generating matrix rod, and then combined it with other components through filling, rolling or compounding processes to produce an aerosol generating product. Since this smoking segment is already an integral cylindrical cigarette core rod, there will be no problem of tobacco particles falling and scattering, so there is no need to set sealing films or blocking parts on both sides of the smoking segment. In addition, it is not limited to the form of filling to combine it with other components to produce aerosol generating products.

[0005] At present, the method of preparing a cylindrical cigarette core rod by bonding scattered tobacco particles with hot melt adhesive is to directly put the scattered tobacco particles into a blender, add a large amount of adhesive into the blender, and then extrude or mold the mixture after stirring until it is evenly mixed. Then, after the cigarette core rod is wrapped with cigarette paper, it is used alone as an aerosol generating matrix rod, and then it is combined with other components through a filling, rolling or compounding process to produce an aerosol generating product. There are two problems with the tobacco core rod prepared by this method. The first is the low porosity of the tobacco rod: 1. Since a large amount of coating material is added during the stirring process, after cooling, the cooled coating material also exists in the gaps between adjacent tobacco particles in the tobacco core rod, which leads to low porosity of the tobacco core rod and small axial air permeability; 2. If, in order to avoid the first problem, less coating material is directly added during the stirring and mixing process, it will cause uneven dispersion of the coating material, and tobacco particles without coating on the surface will be adjacent, resulting in the inability to bond and the problem of tobacco particles scattering; 3. A more critical problem is that the addition of a large amount of coating material will also result in a large amount of coating material being applied to the surface of each tobacco particle, which will seriously affect the release of aerosol after the tobacco particles are heated. In fact, in essence, the purpose of the coating layer is only to allow the scattered tobacco particles to bond, but it is not desired that the non-bonded areas of the tobacco particles are also covered by the coating material, which will affect the 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 rod is formed, a rolling process is required, that is, rod forming and rolling require two steps, which is time-consuming and labor-intensive.

[0006] Therefore, how to bond loose tobacco particles to form a smoking rod while ensuring the porosity and smoke volume of the smoking rod, and how to complete the rod forming and rolling in one step, is a problem that people are concerned about.

[0007] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0008] For the purpose of distinction, the paper tube wrapped in the present invention is referred to as an aerosol generating matrix rod, and the smoking material in the cigarette paper is referred to as a tobacco rod.

[0009] A first aspect of the present invention provides a method for forming and rolling tobacco rods in one step, comprising the following steps:

[0010] (A) coating the surface of tobacco particles with a coating layer in an environment with a humidity of less than 15% to obtain tobacco particles with a coating layer;

[0011] (B) In an environment with a humidity greater than 60%, a composite paper material is placed on a conveyor belt N1, and then a blanking device N4 places tobacco particles with a coating layer on the upstream end of the composite paper material, and a closing device N2 is provided at the downstream end of the composite paper material. 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, the tobacco particles are bonded, and the composite paper material is rolled into a tobacco rod 4 at the closing device N2.

[0012] The surface of the tobacco particles may be only partially covered with the coating layer or may be completely covered with the coating layer.

[0013] Preferably, the coating layer is selected from one or more of hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, and polyvinyl alcohol.

[0014] Preferably, the method for forming a coating layer on the surface of tobacco particles in step (A) is: adding tobacco particles into a stirring barrel, spraying the coating layer material while stirring, stopping spraying the coating layer material after stirring for 5-25 minutes, and continuing stirring for 5-20 minutes; then conveying the tobacco particles with the coating layer material on the surface to a fluidized bed for air drying with cold air for 5-10 minutes, until the coating layer material is dried on the surface of the tobacco particles and forms a coating layer; wherein the coating layer material accounts for 40-75% of the weight of the tobacco particles.

[0015] Preferably, in step (A), tobacco extract, smoke agent, flavors and fragrances can be added to the stirring barrel and stirred together with the tobacco particles and the coating layer material. Adding tobacco extract, smoke agent, flavors and fragrances can further increase the smoke volume, smoke concentration and aroma volume, thereby improving the smoke quality.

[0016] Preferably, the porosity of the tobacco rod is 40-80%.

[0017] Preferably, in step (A), a second portion of tobacco particles without a coating layer on the surface are added to the tobacco particles with a coating layer on the surface after fluidized bed drying, and stirring is continued for 5-15 minutes, wherein the second portion of tobacco particles accounts for 5-30% of the total weight of the tobacco particles.

[0018] The purpose of the batch stirring method is to improve the porosity of the tobacco rod. If a batch stirring method is adopted, that is, the scattered tobacco particles are directly placed in a blender, a large amount of coating layer material is added to the blender, and then stirred and mixed evenly, and the coating layer is activated after coating to bond the tobacco particles into a rod, the problem of this method is that the cooled coating layer material also exists in the gap between adjacent tobacco particles in the tobacco core rod, which leads to low porosity of the tobacco core rod and low axial air permeability. In addition, a large amount of coating layer material is applied to the surface of each tobacco particle, which seriously affects the release of aerosol after the tobacco particles are heated.

[0019] The present invention can coat the surface of tobacco particles with a coating layer by a batch stirring method. First, a portion of tobacco particles and coating layer materials are placed in a stirrer for stirring. After the surface of this portion of tobacco particles has the coating layer material, the second portion of tobacco particles is added to the stirrer for stirring. In this way, it can be ensured that only a portion of the tobacco particles have the coating layer material on their surface. The second portion of tobacco particles is added in the second batch, and there is no coating layer material on its surface, or there is very little coating layer material. During the bonding process, the mixed tobacco particles are in contact. As long as one of the tobacco particles has the coating layer material on its surface, the bonding of the two can be achieved. There is no need for both particles to have the coating layer material. In this way, it can be avoided that the coating layer material in the gap formed between the two particles after bonding will block the pores after cooling. The present invention ensures the axial air permeability and porosity of the cigarette core rod on the basis of achieving bonding.

[0020] Furthermore, the present invention can ensure that only a portion of the surface of the first part of tobacco particles has the coating layer material by controlling the amount of coating layer material added. Since the coating layer material is not applied to a portion of the surface of the tobacco particles, the release of aerosol after the tobacco particles are heated can be well guaranteed, thereby ensuring the amount of smoke.

[0021] Preferably, a steam applying device N3 is provided above the conveyor belt N1 for providing an environment with a humidity greater than 60%.

[0022] Whether to set up a steam application device in the actual production process depends on the actual situation. If the water vapor in the ambient air is sufficient to ensure that the coating layer on the surface of the tobacco particles is activated, and the adhesion is sufficient to bond the loose smoke particles, there is no need to set up an additional steam application device. If the amount of water vapor in the ambient air is insufficient, an additional steam application device can be set up to provide water vapor to ensure the ambient humidity.

[0023] The control of environmental humidity needs to match the running speed of the conveyor belt, as well as the distance between the upstream blanking point and the downstream closing point of the conveyor belt. The three work together to ensure that the tobacco particles are bonded into sticks when they run from the upstream blanking point to the downstream closing device. If the smoke particles are not bonded or are loose when running to the downstream closing device, the length between the upstream blanking point and the downstream closing point, the running speed of the conveyor belt, or the environmental humidity can be extended or reduced. Three means to ensure that the bulk tobacco particles are bonded and formed.

[0024] The second aspect of the present invention provides an aerosol generating product comprising a tobacco rod prepared by the method described in the first aspect of the present invention, which includes an outer tube 3, and a tobacco rod 4, a supporting component 5 and a filtering component 6 located in the outer tube 3; the outer side of the tobacco rod 4 is coated with a composite paper material; the composite paper material includes a paper layer 1 and an adsorption layer 2 close to the tobacco rod.

[0025] Preferably, the adsorption layer 2 comprises a porous material, the porous material is in powder form, the mesh number is 80-1000 mesh, and the porous material is selected from activated carbon, molecular sieve, carbon molecular sieve, alumina or calcium silicate; the application amount of the adsorption layer 2 is 20-90g / cm 3 The composite paper material preparation method is to first prepare the paper layer 1, and then apply the mixture containing porous material and adhesive to the paper layer 1 by calendar coating; or, in the papermaking process during the preparation of the paper layer 1, apply the mixture containing porous material and adhesive to the paper layer 1. The adhesive is selected from one or more of CMC, CM80, chitosan, hydroxypropyl methylcellulose, hydroxypropyl cellulose, povidone, sodium carboxymethyl cellulose, microcrystalline cellulose, polyethylene glycol, and polyvinyl alcohol.

[0026] The adsorption layer on the composite paper material of the present invention is not a thin layer, but has a certain thickness. The advantages of the composite paper material of the present invention for wrapping tobacco rods are: 1. In order to make the wrapping layer sticky, it is necessary to activate it in an environment with a high humidity, and the adsorption layer can absorb moisture in the environment to prevent the paper layer from getting damp. On the other hand, the adsorption layer can also absorb moisture in the coating adhesive in the sticky tobacco rod. 2. During the storage of cigarettes, the moisture in the smoking material seeps into the outside of the cigarette paper tube, resulting in yellow spots. In addition, smoking agents, flavors and fragrances are added to the smoking material. During the long-term storage process, the smoking agent in the smoking material will carry the flavors and fragrances to penetrate into the outside of the paper tube, resulting in yellow spots, affecting the appearance of the paper tube. The adsorption layer can absorb the moisture or smoking agents and other substances that seep out of the smoking material to prevent them from penetrating into the outer wall of the paper tube, thereby preventing the generation of yellow spots.

[0027] In the present invention, the preparation method of tobacco particles can refer to the existing technology, such as mixing tobacco powder, smoke generating agent, etc. into slurry and then granulating.

[0028] Preferably, a cavity structure 7 is provided between the supporting component 5 and the filtering component 6 .

[0029] Preferably, the cavity structure 7 further comprises a functional material; and / or,

[0030] The cavity structure 7 also includes a hollow tube functional part 8. The functional material can be any form of material with cooling and fragrance enhancement functions in the prior art.

[0031] The composite paper material of the present invention is rolled into a paper tube and used as an empty tube functional part 8. The adsorption layer can adsorb functional substances such as flavors, fragrances or smoke-generating agents. Since the functional substances are adsorbed inside the adsorption layer, they can be slowly released during the smoking process, ensuring that the aroma is consistent before and after smoking.

[0032] Preferably, the outer tube 3 has an air vent 31 which radially penetrates the outer tube 3. When there is an empty tube functional part in the cavity structure, the air vent penetrates the outer tube and the empty tube functional part at the same time. The purpose of the air vent is to introduce air into the aerosol generating product, on the one hand to reduce the temperature of the aerosol, and on the other hand to reduce the inhalation resistance, so whether the air vent is needed is determined based on the actual aerosol temperature and inhalation resistance. Of course, the vent can be axially positioned on the supporting component or on the cooling component (i.e., the cavity structure). When it is necessary to set the air vent, it is preferably to punch through to form the air vent. Of course, it is also possible not to punch through but to use breathable paper as the outer tube, as long as air can be introduced into the aerosol generating product.

[0033] The tobacco rod in the present invention is an integrally formed whole, and tobacco particles will not be scattered. The purpose of providing the supporting component is mainly to prevent the tobacco segment from moving toward the downstream segment as a whole. The supporting component can be a paper tube or a gear commonly used in the art. When the supporting component is a paper tube, a vent hole can be provided on the side wall. More preferably, the supporting component is selected from a grooved corrugated part with a gathered sheet rod inside or a multi-layer corrugated structure, etc. The optional blocking part structure can refer to the patent application of the applicant with application number 202210706093.4, entitled "A kind of aerosol generating product with a composite blocking part", or application number 202210706095.3, entitled "A kind of aerosol generating product with a multi-layer grooved corrugated structure", or application number 202210707599.7, entitled "A kind of aerosol generating product with a variable diameter airflow channel blocking part", or application number 202211037571.3, entitled "A kind of aerosol generating product with a porous aerosol generating matrix rod-form blocking part".

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

[0035] 1. After the tobacco particles are coated with a coating layer, if a conventional method is adopted, first extrusion or molding a tobacco rod, and then rolling cigarette paper, a two-step process is required, which is time-consuming and labor-intensive. Since the coating layer material is very sensitive to humidity, the humidity of water vapor in the air can activate it and increase its viscosity. If the tobacco particles are not immediately formed into tobacco rods after the coating layer is coated on the tobacco particles, the tobacco particles with the coating layer need to be sealed and stored. The storage conditions are strict, and material waste caused by improper storage is prone to occur. The present invention directly blanks the tobacco particles after the coating layer is coated on the surface of the tobacco particles, and rolls and bonds them into rods, that is, during the rolling process, the tobacco particles are formed into rods by the force of the cigarette paper rolling and closing. The two-step process of rod formation and rolling is directly completed in one step, which saves time and labor, and has a high yield rate.

[0036] 2. The present invention controls the adhesion of the coating layer by regulating humidity, thereby controlling the fluidity of the tobacco particles with the coating layer. When in a dry environment with a humidity of less than 15%, the coating layer has no adhesion, and the tobacco particles with the coating layer are completely loose and fluid, and the blanking process can be completed. However, when the humidity is greater than 60%, the coating layer deliquesces and activates the viscosity to increase, and the loose tobacco particles are bonded into a smoke body, and the tobacco particles are non-flowable at this time. In addition, the deliquescence of the coating layer is irreversible. When the coating layer deliquesces and the viscosity increases, after the loose tobacco particles are bonded into a smoke body, even if the humidity is decreasing, it will not lose its viscosity and return to the shape of the coating layer.

[0037] 3. The present invention can coat the surface of tobacco particles with a coating layer by a batch stirring method. First, a portion of tobacco particles and coating layer materials are placed in a stirrer for stirring. After the surface of this portion of tobacco particles has the coating layer materials, the second portion of tobacco particles is added to the stirrer for stirring. This ensures that only a portion of the tobacco particles have the coating layer materials on their surfaces. The second portion of tobacco particles is added in the second batch, and has no coating layer materials on its surface, or has very little coating layer materials. During the bonding process, the mixed tobacco particles are in contact. As long as one of the tobacco particles has the coating layer materials on its surface, the bonding of the two can be achieved. There is no need for both particles to have the coating layer materials. This prevents the coating layer materials in the gap formed between the two particles after bonding and clogging the pores after cooling. The present invention ensures the axial air permeability and porosity of the cigarette core rod on the basis of achieving bonding.

[0038] 4. The present invention can also ensure that only a portion of the surface of the first part of tobacco particles has the coating layer material by controlling the amount of coating layer material added. Since the coating layer material is not applied to a portion of the surface of the tobacco particles, the release of aerosol after the tobacco particles are heated can be well guaranteed, thereby ensuring the amount of smoke.

[0039] 5. The composite paper material of the present invention is used in two forms on aerosol generating products. The first is to wrap tobacco sticks. During the storage of cigarettes, the moisture in the smoking material seeps into the outside of the cigarette paper tube, producing yellow spots. In addition, smoke agents, flavors and spices are added to the smoking material. During long-term storage, the smoke agents in the smoking material will carry the flavors and spices to penetrate into the outside of the paper tube, producing yellow spots, affecting the appearance of the paper tube. The adsorption layer can absorb the moisture or smoke agents and other substances that seep out of the smoking material to prevent them from penetrating into the outer wall of the paper tube, thereby preventing the generation of yellow spots. The other is to use the cooling element as an empty tube functional part 8 after being rolled into a paper tube. The adsorption layer on the composite paper material of the present invention is not a thin layer, but has a certain thickness. The adsorption layer can absorb functional substances such as flavors and spices or smoke agents. Since the functional substances are adsorbed into the inside of the adsorption layer, they can have a slow release effect during the suction process, ensuring that the aroma is consistent before and after suction.

[0040] 6. On the one hand, the adsorption layer can avoid the yellow spot problem caused by the extravasation of the smoke-generating agent or flavors in the smoke-generating material. On the other hand, the smoke-generating agent or flavors in the smoke-generating material are adsorbed into the porous material of the adsorption layer. As the tobacco rod continues to be heated, the smoke-generating agent or flavors in the porous material are further released, thereby playing a role in preserving the fragrance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the structure of composite paper.

[0042] Figure 2 Diagram of tobacco stick forming and rolling process.

[0043] Figure 3 Schematic diagram of the three-section cigarette structure in Example 1.

[0044] Figure 4 Example 2 Schematic diagram of a four-section cigarette structure with a cavity structure.

[0045] Names of the reference numerals in the description of the drawings: 1-paper layer, 2-adsorption layer, 3-outer tube, 4-tobacco rod, 5-support component, 6-filter component, 7-cavity structure, 8-empty tube functional part, 31-ventilation hole;

[0046] N1- conveyor belt, N2- closing device, N3- steam application device, N4- blanking device. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with embodiments.

[0048] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0049] Those skilled in the art will appreciate that, unless expressly stated otherwise, 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 invention 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 refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0050] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0052] 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 those generally understood by those skilled in the art in the art 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 the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0053] Example 1

[0054] The aerosol generating product of this embodiment includes an outer tube 3, and a tobacco rod 4, a supporting component 5 and a filtering component 6 located inside the outer tube 3; the outer side of the tobacco rod 4 is coated with a composite paper material; the composite paper material includes a paper layer 1 and an adsorption layer 2 close to the tobacco rod.

[0055] The adsorption layer 2 is activated carbon, and the amount of the adsorption layer 2 applied is 40 g / cm 3 The composite paper material preparation method is to first prepare the paper layer 1, and then apply a mixture containing a porous material and an adhesive to the paper layer 1 by a calender coating method. The adhesive is selected from CMC.

[0056] The outer tube 3 is provided with a vent hole 31 which radially penetrates the outer tube 3. The vent hole is located on the supporting component in the axial direction.

[0057] The method for forming and rolling tobacco rods in this embodiment comprises the following steps:

[0058] (A) coating the surface of tobacco particles with a coating layer in an environment with a humidity of less than 15% to obtain tobacco particles with a coating layer;

[0059] (B) In an environment with a humidity greater than 60%, a composite paper material is placed on a conveyor belt N1, and then a blanking device N4 places tobacco particles with a coating layer on the upstream end of the composite paper material, and a closing device N2 is provided at the downstream end of the composite paper material. 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, the tobacco particles are bonded, and the composite paper material is rolled into a tobacco rod 4 at the closing device N2.

[0060] The coating layer is selected from hydroxypropyl methylcellulose.

[0061] The method for forming a coating layer on the surface of tobacco particles in step (A) is as follows: adding tobacco particles into a stirring barrel, spraying the coating layer material while stirring, stopping spraying the coating layer material after stirring for 15 minutes, and continuing stirring for 10 minutes; then conveying the tobacco particles with the coating layer material on the surface to a fluidized bed for air drying with cold air for 10 minutes, until the coating layer material is dried on the surface of the tobacco particles and forms a coating layer; wherein the coating layer material accounts for 70% of the weight of the tobacco particles.

[0062] In step (A), tobacco extract, smoke agent, flavors and fragrances may be added to the stirring barrel and stirred together with the tobacco particles and the coating layer material. Adding tobacco extract, smoke agent, flavors and fragrances may further increase the smoke volume, smoke concentration and aroma volume, thereby improving the smoke quality.

[0063] The porosity of the tobacco rod was 70%.

[0064] Step (A), adding a second portion of tobacco particles without a coating layer on the surface to the tobacco particles with a coating layer on the surface after fluidized bed drying, and continuing stirring for 10 minutes, wherein the second portion of tobacco particles accounts for 5% of the total weight of the tobacco particles.

[0065] A steam application device N3 is also provided above the conveyor belt N1 to provide an environment with a humidity greater than 60%.

[0066] Example 2

[0067] The difference between the aerosol generating product of this embodiment and that of embodiment 1 is as follows:

[0068] A cavity structure 7 is further provided between the supporting component 5 and the filtering component 6 .

[0069] The cavity structure 7 also includes a hollow tube functional component 8 .

[0070] In this embodiment, the composite paper material is rolled into a paper tube as the empty tube functional part 8. The adsorption layer can adsorb functional substances such as flavors, fragrances or smoke-generating agents. Since the functional substances are adsorbed inside the adsorption layer, they can be slowly released during the smoking process, ensuring that the aroma is consistent before and after smoking.

[0071] The outer tube 3 is provided with a vent hole 31 which radially penetrates the outer tube 3. The vent hole is located on the cavity structure in the axial direction.

Claims

1. An aerosol-generating article comprising a tobacco rod, characterized in that It comprises an outer tube (3), and a tobacco rod (4), a supporting component (5) and a filtering component (6) located inside the outer tube (3); the tobacco rod (4) comprises tobacco particles and a composite paper material located outside the tobacco particles; the composite paper material comprises a paper layer (1) and an adsorption layer (2) close to the tobacco particles; A method for completing the tobacco rod (4) into a rod and rolling in one step, comprising the following steps: (A) coating the surface of tobacco particles with a coating layer in an environment with a humidity of less than 15% to obtain tobacco particles with a coating layer; (B) in an environment with a humidity greater than 60%, placing the composite paper material on a conveyor belt (N1), and then placing tobacco particles with a coating layer on the upstream end of the composite paper material by a blanking device (N4), and the downstream end of the composite paper material is provided with a closing device (N2), and 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, and during the running process, the coating layer is activated, and the tobacco particles are bonded, and are rolled into the tobacco rod (4) through the composite paper material at the closing device (N2); A cavity structure (7) is also provided between the support component (5) and the filter component (6); The cavity structure (7) further contains a functional material; and / or, The cavity structure (7) further comprises a hollow tube functional component (8); The outer tube (3) is provided with a vent hole (31) which radially penetrates the outer tube (3).

2. The aerosol-generating article 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; In step (A), tobacco extract, smoke generating agent, flavor and fragrance can be added into the stirring barrel and stirred together with tobacco particles and coating layer materials.

3. The aerosol-generating article 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: adding tobacco particles into a stirring barrel, spraying the coating layer material while stirring, stopping spraying the coating layer material after stirring for 5-25 minutes, and continuing stirring for 5-20 minutes; then conveying the tobacco particles with the coating layer material on the surface to a fluidized bed for air drying with cold air for 5-10 minutes, until the coating layer material is dried on the surface of the tobacco particles and forms a coating layer; wherein the coating layer material accounts for 40-75% of the weight of the tobacco particles.

4. The aerosol-generating article according to claim 1, wherein: The porosity of the tobacco rod is 40-80%.

5. The aerosol-generating article according to claim 3, wherein: Step (A), adding a second portion of tobacco particles without a coating layer on the surface to the tobacco particles with a coating layer on the surface after fluidized bed drying, and continuing stirring for 5-15 minutes, wherein the second portion of tobacco particles accounts for 5-30% of the total weight of the tobacco particles.

6. The aerosol-generating article of claim 1, wherein: A steam application device (N3) is also provided above the conveyor belt (N1) for providing an environment with a humidity greater than 60%.

7. The aerosol-generating article of claim 1, wherein: The adsorption layer (2) comprises a porous material, the porous material is in powder form, the mesh number is 80-1000 mesh, and the porous material is selected from activated carbon, molecular sieve, carbon molecular sieve, alumina or calcium silicate; the application amount of the adsorption layer (2) is 20-90g / cm 3 The method for preparing the composite paper material comprises first preparing the paper layer (1), and then applying a mixture comprising a porous material and an adhesive to the paper layer (1) by a calender coating method; or, in the papermaking process during the preparation of the paper layer (1), applying the mixture comprising a porous material and an adhesive to the paper layer (1).

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