An aerosol generating product having a particle-type aerosol generating matrix rod with high porosity

Abstract

The invention discloses an aerosol generating product with a particle-type aerosol generating matrix rod having a high porosity, comprising a smoking core material section (1), a breathable hollow section (2) and a filter section (3); the smoking core material section (1) comprises an aerosol generating matrix rod and an anti-seepage / heat-conducting cigarette paper wrapping the aerosol generating matrix rod, the aerosol generating matrix rod is formed by bonding scattered tobacco particles with a binder, and only part of the surface of some tobacco particles in the aerosol generating matrix rod has the binder; the internal porosity of the smoking core material section (1) is 40-80%; the breathable hollow section (2) and the filter section (3) are wrapped with forming paper (5) to form a mouthpiece, and the smoking core material section (1) and the mouthpiece are connected by a connecting paper (4). Before the scattered tobacco particles of the present invention are bonded, not all tobacco particle surfaces have adhesives, and the adhesives do not cover the entire surface of the tobacco particles. This ensures that after the tobacco particles are bonded, there will be no problem of pore clogging in the gaps formed between the two due to the adhesive cooling, thereby ensuring the axial air permeability and porosity of the aerosol generating matrix rod.

Description

Technical Field

[0001] The invention relates to the technical field of heat-not-burn cigarettes, and in particular to an aerosol generating product of a particle-type aerosol generating matrix rod with high porosity. 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] The smoking material of granular heated cigarettes is bulk smoking particles. In the prior art, since the bulk smoking particles cannot be fixed, they must be filled into the outer tube by filling, and the particles need to be fixed on both sides of the smoking particle segment by means of sealing paper and sealing parts, resulting in low production efficiency and high defective rate.

[0004] First, on this basis, the present invention bonds the bulk smoke-generating particles together through an adhesive to form a cylindrical aerosol generating matrix rod, and then after the aerosol generating matrix rod is wrapped with anti-seepage / heat-conducting cigarette paper, it is used alone as a solid aerosol generating matrix rod, and then it is combined with other components to produce an aerosol generating product through a filling, rolling or compounding process. Since this smoking segment is already an integral cylindrical aerosol generating matrix rod, there will be no problem of smoke-generating 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 filling form to combine it with other components to produce an aerosol generating product.

[0005] At present, the method of preparing a cylindrical aerosol-generating matrix rod by bonding scattered smoke particles with a binder is to directly put the scattered tobacco particles into a stirrer, add a large amount of binder into the stirrer, and then stir and mix them evenly, then extrude and cool them. The problems of the aerosol-generating matrix rod prepared by this method are: 1. Since a large amount of binder is added during the stirring process, after cooling, the cooled binder also exists in the gaps between adjacent tobacco particles in the aerosol-generating matrix rod, which leads to low porosity and small axial air permeability of the aerosol-generating matrix rod; 2. If less binder is added directly during the stirring and mixing process in order to avoid the first problem, the binder will be unevenly dispersed, and there will be no adjacent tobacco particles with glue on the surface, resulting in the problem of unable to bond and the problem of scattered smoke particles; 3. Another more critical problem is that the addition of a large amount of binder will also result in a large amount of binder being applied to the surface of each tobacco particle, thereby seriously affecting the release of aerosol after the tobacco particles are heated. In fact, in essence, the purpose of gluing is only to allow the scattered tobacco particles to bond, but it is not hoped that the places where the tobacco particles are not bonded are also glued, which affects the aerosol release.

[0006] Therefore, how to ensure that the surfaces where tobacco particles adhere to each other have adhesive, while the surfaces where they do not adhere have no adhesive, is the key to ensuring the porosity and smoke volume of the aerosol generating matrix rod.

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

[0008] The present invention provides an aerosol generating product of a particle-type aerosol generating matrix rod with high porosity, characterized in that it comprises a smoke-generating core material segment 1, a breathable hollow segment 2 and a filter segment 3;

[0009] The smoking core material segment 1 includes an aerosol generating matrix rod and an anti-seepage / heat-conducting cigarette paper wrapping the aerosol generating matrix rod, wherein the aerosol generating matrix rod is formed by bonding scattered tobacco particles with a binder, and only a part of the surface of some tobacco particles in the aerosol generating matrix rod has the binder; the internal porosity of the smoking core material segment 1 is 40-80%;

[0010] The air-permeable hollow section 2 and the filter section 3 are wrapped by forming paper 5 to form a mouthpiece, and the smoking core material section 1 and the mouthpiece are connected by tipping paper 4.

[0011] More preferably, the porosity of the smokable core material segment is 80%.

[0012] Preferably, the sizing area of ​​the tobacco particles accounts for 20-40% of the surface area of ​​the tobacco particles.

[0013] Preferably, the mass ratio of the unsized tobacco particles to the sized tobacco particles is 1:2-5:1.

[0014] Preferably, the axial suction resistance of the smokable core material segment is 5-40 Pa / mm. More preferably, the axial suction resistance of the smokable core material segment is 10 Pa / mm.

[0015] Preferably, the weight of the anti-seepage / thermal conductive paper is 30-70 g / m 2 ; The particle size of the tobacco particles is 8-60 mesh. More preferably, the gram weight of the anti-seepage / thermal conductive paper is 60g / m 2 The particle size of tobacco particles is 20-30 mesh.

[0016] Preferably, the binder is selected from chitosan, hydroxyethylated composite modified ethyl cellulose, guar gum, carboxymethyl cellulose, starches, modified starches, plant celluloses, microcrystalline cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose.

[0017] Preferably, the breathable hollow section 2 is made of paper, silica gel, acetate fiber, polylactic acid, or non-woven fabric.

[0018] Preferably, the breathable hollow section 2 is grooved corrugated or gear-shaped, and has circumferentially distributed small-pore airflow channels 21 penetrating the breathable hollow section 2, and also has a large-pore airflow channel 22 penetrating the breathable hollow section 2 at the axial center; wherein the structure of the breathable hollow section in the shape of a grooved corrugated structure can refer to the patent application filed by the present applicant, with application number 2021111148695, entitled: A kind of aerosol-generating product with a flavored core segment, and the description of the grooved corrugated breathable hollow section involved in the application is incorporated into this application. wherein the structure of the breathable hollow section in the shape of a gear can refer to the patent application filed by the present applicant, with application number 2021111166585, entitled: A kind of aerosol-generating product with a flavored core segment, and the description of the gear-shaped breathable hollow section involved in the application is incorporated into this application.

[0019] Preferably, there are ventilation holes 23 on the tube wall of the breathable hollow section 2, and the area of ​​the ventilation holes 23 is 1 / 2-7 / 8 of the cross-sectional area of ​​the filter.

[0020] Preferably, the shaping paper 5 and the tipping paper 4 are naturally air-permeable.

[0021] Preferably, the aerosol generating product further comprises a functional segment, which is located between the smokable core material segment 1 and the air-permeable hollow segment 2, or between the air-permeable hollow segment 2 and the filter segment 3, and the functional segment has the functions of cooling and converging smoke;

[0022] When the functional section 6 is located between the air-permeable hollow section 2 and the filter section 3, the functional section 6 can be a hollow tube, and the wall of the hollow tube is air-permeable, and can be air-permeable by itself or by punching holes in the tube wall. The structure and preparation method of the hollow tube with naturally air-permeable tube wall can refer to the patent application of the applicant, application number 2021105997045, entitled: A patent for a heated cigarette filter rod with natural air-permeability and a heated cigarette containing the same, and the description of the hollow tube with naturally air-permeable tube wall involved in the application is incorporated into this application.

[0023] Preferably, the filter segment 3 may be made of conventional solid acetate fiber tow.

[0024] The aerosol generating product of the particle-type aerosol generating matrix rod with high porosity of the present invention has high porosity due to a special preparation method, and there are two specific preparation methods.

[0025] The first method uses a spray gluing method, in which the adhesive is evenly sprayed directly from the spray head on the top of the tobacco particles to the top of the tobacco particles. This ensures that only the top of the tobacco particles is glued, while the bottom and sides are not glued. On the basis of achieving adhesion, the release of aerosols after the tobacco particles are heated is guaranteed, as well as the amount of smoke and the axial air permeability and porosity of the aerosol generating matrix rod.

[0026] The specific method includes the following steps:

[0027] (1) taking tobacco particles and spreading them on a sizing plate so that at least a portion of the sizing plate contains at least two layers of tobacco particles;

[0028] (2) spraying the adhesive evenly onto the top of the tobacco particles through a spray head above the sizing plate, so that the top of the surface tobacco particles are sizing, while the bottom tobacco particles are not sizing;

[0029] (3) Finally, the sizing tobacco particles and the unsizing tobacco particles are mixed and extruded, and after cooling, they are wrapped with anti-seepage / heat-conducting paper to obtain a smoking core material segment, wherein the gaps between the tobacco particles in the smoking core material segment form an airflow channel axially penetrating the smoking core material segment.

[0030] Preferably, the mass ratio of tobacco particles to binder is 2:1-10:1, more preferably, the mass ratio of tobacco particles to binder is 3:1.

[0031] Preferably, in step (1), at least 70-100% of the area on the sizing board contains at least two layers of tobacco particles, and more preferably, at least 90% of the area on the sizing board contains at least two layers of tobacco particles.

[0032] Preferably, in step (2), the area of ​​the top of the tobacco particles coated with glue accounts for 20-40% of the surface area of ​​the tobacco particles. That is, the sized tobacco particles are only coated with glue on the top, and the sides and bottom are not coated with glue.

[0033] Preferably, in step (3), the mass ratio of the unsized tobacco particles to the sized tobacco particles is 1:1-5:1, and more preferably, the mass ratio of the unsized tobacco particles to the sized tobacco particles is 3:1.

[0034] The second method is to use a batch stirring and gluing method. First, a portion of tobacco particles are placed in a stirrer for stirring and gluing, and then the second portion of tobacco particles without gluing are added. This ensures that only a portion of the tobacco particles have glue on their surface, and the second portion of tobacco particles have no glue on their surface. The two are stirred and mixed and then extruded. On the basis of achieving adhesion, the release of aerosol after the tobacco particles are heated is guaranteed, as well as the amount of smoke and the axial air permeability and porosity of the aerosol generating matrix rod.

[0035] The specific method includes the following steps:

[0036] (1) placing the first portion of tobacco particles in a stirrer and stirring, spraying a binder while stirring, and stirring for 5-20 minutes;

[0037] (2) adding a second portion of tobacco particles into the blender and continuing to blend for 5-10 minutes;

[0038] (3) Finally, the mixed first part of tobacco particles and the second part of tobacco particles are extruded, cooled and wrapped with anti-seepage / heat-conducting paper to obtain a smoking core material segment, wherein the gaps between the tobacco particles in the smoking core material segment form an airflow channel axially penetrating the smoking core material segment.

[0039] The stirring time of the first part of tobacco particles and the stirring time after adding the second part of tobacco particles are not limited to the above time lengths, and the stirring time needs to be determined according to the added amount of particles and the added amount of binder. The purpose and degree of the first step of stirring ensure that the first part of tobacco particles and the sprayed binder are stirred evenly, and the surface of the first part of tobacco particles at least partially contains the binder, and the purpose and degree of the second step of stirring ensure that the first part of tobacco particles and the second part of tobacco particles are stirred evenly.

[0040] Preferably, the mass ratio of the first portion of tobacco particles to the second portion of tobacco particles is 1:5-2:1, and more preferably, the mass ratio of the first portion of tobacco particles to the second portion of tobacco particles is 1:3.

[0041] Preferably, the mass ratio of the first portion of tobacco particles to the binder is 2:1-10:1, and more preferably, the mass ratio of the tobacco particles to the binder is 1:5.

[0042] The anti-seepage / thermal conductive paper of the present invention has an anti-seepage / thermal conductive layer with anti-seepage or thermal conductive function, and the anti-seepage / thermal conductive layer includes a waterproof layer and / or an oil-proof layer and / or a thermal conductive layer;

[0043] The waterproof layer is made of alkyl ketene dimer AKD, cationic rosin glue or iron-free aluminum sulfate mixed, paraffin material; the oil-proof layer is made of fluorocarbon organic matter, modified starch, AKD and paraffin mixture, AKD and modified starch mixture material. The heat-conducting layer is selected from but not limited to the aluminum foil layer, which is added to the inner wall of the cigarette paper tube by pasting; the aluminum foil layer can play the role of waterproof and / or oil-proof, and at the same time, the aluminum foil layer also has the role of heat conduction and heat preservation, so that the smoking material on the inner wall of the cigarette is evenly heated.

[0044] Preferably, the waterproof layer and / or oil-proof layer is coated on the inner wall of the cigarette paper tube by spraying.

[0045] During the storage of aerosol generating products, the moisture in the smoking material seeps to the outside of the cigarette paper tube, causing yellow spots, so it is necessary to add a waterproof layer to the inner wall of the cigarette paper tube filled with the smoking material. The waterproof layer is made of alkyl ketene dimer AKD, cationic rosin glue or iron-free aluminum sulfate mixed with paraffin material, which can prevent the moisture in the smoking material from seeping to the outside of the cigarette paper tube.

[0046] Similarly, smoking materials will be added with smoking agents, flavors and fragrances. During long-term storage, the smoking agents in the smoking materials will carry the flavors and fragrances to penetrate the outer side of the paper tube, resulting in yellow spots and affecting the appearance of the paper tube. Since the smoking agents are oily, it is necessary to add an oil-proof layer to the inner wall of the cigarette paper tube filled with smoking materials. The oil-proof layer uses a mixture of fluorocarbon organic matter, modified starch, AKD and paraffin, and a mixture of AKD and modified starch, which can prevent the smoking agents in the smoking materials from carrying flavors and fragrances to penetrate the outer wall of the paper tube and prevent the generation of yellow spots.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. The aerosol generating product of the present invention comprises a particle-type aerosol generating matrix rod with high porosity, wherein the internal porosity of the smoking core material segment 1 is 40-80%, and such a high porosity depends on the structure of the smoking core material segment 1, the smoking core material segment 1 comprises an aerosol generating matrix rod and an impermeable / heat-conducting cigarette paper wrapping the aerosol generating matrix rod, the aerosol generating matrix rod is formed by bonding scattered tobacco particles with a binder, and only part of the surface of some tobacco particles in the aerosol generating matrix rod has a binder; that is, not all tobacco particles have a binder on their surfaces before bonding, and the binder does not cover the entire surface of the tobacco particles, which ensures that after the tobacco particles are bonded, there will be no problem of the binder blocking the pores after cooling in the gap formed between the two, thereby ensuring the axial ventilation and porosity of the aerosol generating matrix rod. A high-porosity cigarette core can not only increase the amount of smoke, but also simplify the structure of the aerosol generating product.

[0049] 2. There are two methods for preparing the smoke-generating core material segment 1 with high porosity of the present invention, namely, spraying method and batch stirring method.

[0050] The advantages of the spray method for preparing a solid aerosol generating matrix rod with high porosity are:

[0051] (1) The adhesive is sprayed evenly on the top of the tobacco particles directly from the spray head on the top of the tobacco particles, so that the adhesive is only applied on the top of the tobacco particles, while the bottom and sides are not applied. The area of ​​the top of the tobacco particles applied with adhesive accounts for 20-40% of the surface area of ​​the tobacco particles. After stirring evenly, at least one of the two adjacent tobacco particles has adhesive on its surface area, so that adhesion can be achieved. Similarly, since the bottom and sides of the tobacco particles are not applied with adhesive, the release of aerosol after the tobacco particles are heated can be well guaranteed, and the amount of smoke can be guaranteed.

[0052] (2) The tobacco particles of the present invention are directly spread on the sizing plate, and are not spread in a thin layer on the sizing plate, but at least part of the area on the sizing plate contains at least two layers of tobacco particles. This further ensures that only part of the surface of some tobacco particles is glued. In essence, during the bonding process, when two tobacco particles are in contact, as long as there is glue on one of the surfaces, the two can be bonded together, without the need for both particles to have glue on them. This can avoid the adhesive in the gap formed between the two particles after bonding, blocking the pores after cooling, thereby ensuring the axial ventilation and porosity of the aerosol generating matrix rod.

[0053] The advantages of the batch stirring method for preparing a solid aerosol generating matrix rod with high porosity are:

[0054] (1) A method of batch mixing and gluing is adopted, first a portion of tobacco particles is placed in a stirrer for stirring, and a binder is sprayed while stirring. After the surface of this portion of tobacco particles has glue, a second portion of tobacco particles is added to the stirrer for stirring, so that only a portion of the tobacco particles have glue on their surface, and the second portion of tobacco particles is added in the second batch, and no glue is applied on its surface. In this way, the first portion of tobacco particles with glue applied on the surface and the second portion of particles without glue applied on the surface are mixed and extruded. In essence, during the bonding process, the two tobacco particles are in contact, and as long as one of the surfaces has glue, the bonding of the two can be achieved, and there is no need for both particles to have glue on them. In this way, the binder in the gap formed between the two particles after bonding can be avoided from clogging the pores after cooling. The present invention ensures the axial air flow and porosity of the aerosol generating matrix rod on the basis of achieving bonding.

[0055] (2) Furthermore, the present invention can ensure that only a portion of the surface of the first part of tobacco particles is coated with glue by controlling the amount of added binder. Since the surface of the tobacco particles is not partially coated with glue, the release of aerosol after the tobacco particles are heated can be well guaranteed, thereby ensuring the amount of smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 Schematic diagram of the structure of the aerosol generating product of the particle-type aerosol generating matrix rod with high porosity in Example 1 and Example 2;

[0057] The names of the figure numbers in the figure description are: 1-smoking core material segment, 2-breathable hollow segment, 3-filter segment, 4-tipping paper, 5-forming paper, 21-small hole air flow channel, 22-large hole air flow channel, 23-ventilation hole.

[0058] Figure 2 This is a schematic diagram of the spray sizing process in the process of spraying to prepare a smoky core material segment with high porosity in Example 1;

[0059] Figure 3 This is a schematic diagram of the structure of the high-porosity smoke-generating core material segment in Example 1.

[0060] The names of the figure symbols in the figure description are: P1-gluing plate, P2-spraying device, P3-sprayed hot melt adhesive, P4-tobacco particles, P5-smoking core material segment, P6-air flow channel, P41-glued tobacco particles, P42-unglued tobacco particles.

[0061] Figure 4 This is a schematic diagram of the stirring and gluing process in the batch stirring preparation of the smokable core material segment with high porosity in Example 2;

[0062] Figure 5 This is a schematic diagram of the structure of the high-porosity smoke-generating core material segment in Example 2.

[0063] The names of the figure numbers in the figure description are: J1-mixing drum, J2-spraying device, J3-sprayed binder, J4-tobacco particles, J5-smoking core material segment, J6-air flow channel, J41-glued tobacco particles, J42-unglued tobacco particles.

[0064] Figure 6 This is a schematic structural diagram of the aerosol generating product of the particle-type aerosol generating matrix rod with high porosity in Example 3. DETAILED DESCRIPTION

[0065] The present invention is further described in detail below in conjunction with embodiments.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] Example 1

[0072] This embodiment is an aerosol generating product of a particle-type aerosol generating matrix rod with high porosity, which includes a smoke-generating core material segment 1, a breathable hollow segment 2 and a filter segment 3;

[0073] The smoking core material segment 1 includes an aerosol generating matrix rod and an anti-seepage / heat-conducting cigarette paper wrapping the aerosol generating matrix rod, the aerosol generating matrix rod is formed by bonding scattered tobacco particles with a binder, and only part of the surface of some tobacco particles in the aerosol generating matrix rod has the binder; the internal porosity of the smoking core material segment 1 is 80%;

[0074] The air-permeable hollow section 2 and the filter section 3 are wrapped by a shaping paper 5 to form a mouthpiece, and the smoking core material section 1 and the mouthpiece are connected by a tipping paper 4.

[0075] The ventilating hollow section 2 is made of paper in a grooved corrugated shape. There are vents 23 on the tube wall of the ventilating hollow section 2, and the area of ​​the vents 23 is 1 / 4 of the cross-sectional area of ​​the filter tip.

[0076] The preparation method of the particle-type aerosol generating matrix rod with high porosity in this embodiment is: spraying sizing method. Figure 2-3 As shown, the specific steps include:

[0077] (1) taking tobacco particles and spreading them on a sizing plate P1 so that at least a portion of the sizing plate contains at least two layers of tobacco particles P4;

[0078] (2) The adhesive P3 is evenly sprayed onto the top of the tobacco particles through the spray head (spraying device) P2 above the glue-applying plate, so that the top of the surface tobacco particles is glued, while the bottom tobacco particles are not glued;

[0079] (3) Finally, the sized tobacco particles P41 and the unsized tobacco particles P42 are mixed evenly and then extruded. After cooling, they are wrapped with anti-seepage / heat-conducting paper to obtain the smoking core material segment P5.

[0080] The mass ratio of tobacco particles to adhesive is 3:1. In step (1), at least 90% of the area on the sizing plate contains at least two layers of tobacco particles. In step (2), the area of ​​the top of the tobacco particles sizing accounts for 30% of the surface area of ​​the tobacco particles. In other words, the sizing tobacco particles are only sizing on the top, and the sides and bottom are not sizing. In step (3), the mass ratio of unsizing tobacco particles to sizing tobacco particles is 3:1. The gram weight of the anti-seepage / thermal conductive paper is 60g / m 2 The particle size of the tobacco particles is 20-30 meshes. The binder is selected from carboxymethyl cellulose.

[0081] After measurement, the axial suction resistance in the final smoky core material segment is 10 Pa / mm. The smoky core material segment P5 includes an airflow channel axially penetrating the smoky core material segment P5, and the porosity of the smoky core material segment P5 is 80%.

[0082] Example 2

[0083] The aerosol generating product of this embodiment has the same structure as that of Embodiment 1, and the only difference is that the preparation method of the high-porosity particle-type aerosol generating matrix rod is different.

[0084] The preparation method of the particle-type aerosol generating matrix rod with high porosity in this embodiment is: a batch stirring method. Figure 4-5 As shown, the specific steps include:

[0085] (1) placing the first portion of tobacco particles in a stirrer and stirring, spraying a binder while stirring, and stirring for 10 minutes;

[0086] (2) adding a second portion of tobacco particles to the blender and continuing to blend for 5 minutes;

[0087] (3) Finally, the mixed first part of tobacco particles and the second part of tobacco particles are extruded, cooled and wrapped with anti-seepage / heat-conducting paper to obtain a smoking core material segment, wherein the gaps between the tobacco particles in the smoking core material segment form an airflow channel J6 axially penetrating the smoking core material segment.

[0088] The mass ratio of the first part of tobacco particles to the second part of tobacco particles is 1:3. The mass ratio of tobacco particles to binder is 1:5. The weight of the anti-seepage / thermal conductive paper is 60g / m 2 The particle size of the tobacco particles is 20-30 meshes. The binder is selected from chitosan.

[0089] After measurement, the axial suction resistance in the final smoky core material segment is 10 Pa / mm. The smoky core material segment J5 includes an airflow channel axially penetrating the smoky core material segment J5, and the porosity of the smoky core material segment J5 is 80%.

[0090] Example 3

[0091] like Figure 6 The present embodiment is an aerosol generating product having a granular aerosol generating matrix rod with high porosity. The preparation method of the aerosol generating matrix rod is the same as that of Example 1, and the only difference lies in the cigarette structure. The aerosol generating product of the present embodiment is added with a functional segment 6 on the basis of Example 1. When the functional segment 6 is located between the breathable hollow segment 2 and the filter segment 3, the functional segment 6 can be a hollow tube, and the wall of the hollow tube is breathable.

[0092] Comparative Example 1

[0093] The structure of the aerosol generating product is the same as that of Example 1.

[0094] Directly put the scattered tobacco particles into the blender, add a large amount of binder into the blender, then stir and mix evenly, extrude and cool.

[0095] The surface of the smoke-generating particles in the smoke-generating core material segment finally obtained is almost 100% sizing, the porosity after measurement is less than 30%, and the axial suction resistance is as high as 100 Pa / mm.

Claims

1. An aerosol generating product having a particle-type aerosol generating matrix rod with high porosity, characterized in that: It comprises a smoke-generating core material section (1), a breathable hollow section (2) and a filter section (3); The smoking core material segment (1) comprises an aerosol generating matrix rod and an impermeable / heat-conductive cigarette paper wrapping the aerosol generating matrix rod, the aerosol generating matrix rod is formed by scattered tobacco particles bonded by a binder, and only a part of the surface of some tobacco particles in the aerosol generating matrix rod has the binder; the internal porosity of the smoking core material segment (1) is 40-80%; The air-permeable hollow section (2) and the filter section (3) are wrapped with forming paper (5) to form a mouthpiece, and the smoking core material section (1) and the mouthpiece are connected with tipping paper (4); The aerosol generating product of the particle-type aerosol generating matrix rod with high porosity is prepared by the following method: The method of spraying glue is adopted, and the specific method comprises the following steps: (1) taking tobacco particles and spreading them on a sizing plate so that at least a portion of the sizing plate contains at least two layers of tobacco particles; (2) Spraying the adhesive evenly onto the top of the tobacco particles through a spray head above the sizing plate, so that the top of the surface tobacco particles are sizing, while the bottom tobacco particles are not sizing; (3) Finally, the sizing tobacco particles and the unsizing tobacco particles are mixed evenly and then extruded, and after cooling, they are wrapped with anti-seepage / heat-conducting paper to obtain a smoking core material segment, wherein the gaps between the tobacco particles in the smoking core material segment form an airflow channel axially penetrating the smoking core material segment.

2. The aerosol generating product of the particle-type aerosol generating matrix rod having high porosity according to claim 1, characterized in that: The area of ​​tobacco particle sizing accounts for 20-40% of the surface area of ​​tobacco particles.

3. The aerosol generating product of the particle-type aerosol generating matrix rod having high porosity according to claim 1, characterized in that: The mass ratio of the unsized tobacco particles to the sized tobacco particles is 1:2-5:

1.

4. An aerosol generating product having a particle-type aerosol generating matrix rod with high porosity, characterized in that: It comprises a smoke-generating core material section (1), a breathable hollow section (2) and a filter section (3); The smoking core material segment (1) comprises an aerosol generating matrix rod and an impermeable / heat-conductive cigarette paper wrapping the aerosol generating matrix rod, the aerosol generating matrix rod is formed by scattered tobacco particles bonded by a binder, and only a part of the surface of some tobacco particles in the aerosol generating matrix rod has the binder; the internal porosity of the smoking core material segment (1) is 40-80%; The air-permeable hollow section (2) and the filter section (3) are wrapped with forming paper (5) to form a mouthpiece, and the smoking core material section (1) and the mouthpiece are connected with tipping paper (4); The aerosol generating product of the particle-type aerosol generating matrix rod with high porosity is prepared by the following method: The method of batch stirring sizing is adopted, and the specific method comprises the following steps: (1) placing the first portion of tobacco particles in a stirrer and stirring, spraying a binder while stirring, and stirring for 5-20 minutes; (2) Add the second portion of tobacco particles into the blender and continue blending for 5-10 minutes; (3) Finally, the mixed first part of tobacco particles and the second part of tobacco particles are extruded, cooled and wrapped with anti-seepage / heat-conducting paper to obtain a smoking core material segment, wherein the gaps between the tobacco particles in the smoking core material segment form an airflow channel axially penetrating the smoking core material segment.

5. The aerosol generating product of the particle-type aerosol generating matrix rod having high porosity according to any one of claims 1 or 4, characterized in that: The axial suction resistance of the smoke-generating core material segment is 5-40 Pa / mm.

6. The aerosol generating product of the particle-type aerosol generating matrix rod having high porosity according to any one of claims 1 or 4, characterized in that: The weight of the anti-seepage / thermal conductive paper is 30-70g / m 2 ; The particle size of tobacco particles is 8-60 mesh.

7. An aerosol generating product having a particle-type aerosol generating matrix rod with high porosity according to any one of claims 1 or 4, characterized in that: The binder is selected from chitosan, hydroxyethylated composite modified ethyl cellulose, guar gum, carboxymethyl cellulose, starch, modified starch, plant cellulose, microcrystalline cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose; The breathable hollow section (2) is made of paper, silica gel, acetate fiber, polylactic acid, and non-woven fabric.

8. The particle-type aerosol generating matrix rod aerosol generating product with high porosity according to any one of claims 1 or 4, characterized in that: The ventilated hollow section (2) is in the shape of a grooved corrugated wall or a gear, and has a circumferentially distributed small-pore airflow channel (21) penetrating the ventilated hollow section (2), and also has a large-pore airflow channel (22) penetrating the ventilated hollow section (2) at the axial center; the ventilated hollow section (2) has a vent hole (23) on the tube wall, and the area of ​​the vent hole is 1 / 2-7 / 8 of the cross-sectional area of ​​the filter tip.

9. The particle-type aerosol generating matrix rod aerosol generating product with high porosity according to any one of claims 1 or 4, characterized in that: The shaping paper (5) and the tipping paper (4) are naturally breathable.

10. The particle-type aerosol generating matrix rod aerosol generating product with high porosity according to any one of claims 1 or 4, characterized in that: The aerosol generating product further comprises a functional section (6), which is located between the smoke-generating core material section (1) and the air-permeable hollow section (2), or between the air-permeable hollow section (2) and the filter section (3), and the functional section has the functions of cooling and converging smoke; When the functional section (6) is located between the air-permeable hollow section (2) and the filter section (3), the functional section (6) is a hollow tube, and the wall of the hollow tube is air-permeable, either having an air-permeable function itself or being air-permeable by means of holes punched in the tube wall.

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