CN115606842A - Solid aerosol generating substrate, aerosol generating article and use thereof - Google Patents

Abstract

The invention belongs to the technical field of aerosol generating products, and particularly relates to a solid aerosol generating substrate, an aerosol generating product and application thereof. The solid aerosol-generating substrate comprises: the device comprises a foaming material section (1), a smoke particle section (2) and a plugging section (3) which are sequentially arranged from upstream to downstream; the section (1) of foamed material comprises a foam-like matrix main body with a pore structure, and one or more of smoking substances, flavoring substances and tobacco substances are arranged in the pore structure; the plugging section (3) is internally provided with an axial airflow channel. The present invention provides for the first time a solid aerosol-generating substrate. The two ends of the foaming material section (1) and the blocking section (3) are respectively blocked with smoke particles. The foaming material section (1) is loaded with one or more of smoking substances, flavoring substances and tobacco substances. The foam material segment (1) thus has the effect of blocking the smoking particles and can also be heated and smoked like the smoking particle segment (2) as a core segment.

Description

Solid aerosol generating substrate, aerosol generating article and use thereof

Technical Field

The invention belongs to the technical field of aerosol-generating products, and particularly relates to a solid aerosol-generating substrate, an aerosol-generating product and application thereof.

Background

The particle type aerosol-generating product has the characteristics of large smoke amount, sufficient aroma and the like. However, the conventional particle type aerosol generating product needs to use filling equipment to fill and seal particles, so that the production efficiency and the stability of the product quality are greatly reduced. In addition, a sealing film is generally used for sealing, and the sealing film is adhered to only the end of the aerosol-generating article and is likely to fall off.

The present invention has been made to solve the above problems.

Disclosure of Invention

The present invention provides in a first aspect a solid aerosol-generating substrate comprising: the foaming material section 1, the fuming particle section 2 and the plugging section 3 are sequentially arranged from upstream to downstream;

the section 1 of the foaming material comprises a foam-shaped substrate main body with a pore structure, wherein one or more of smoking substances, flavoring substances and tobacco substances are arranged in the pore structure;

an axial airflow channel is arranged in the plugging section 3, and the interception quantity is small. The size of the axial airflow channel is smaller than the size of the smoker particles to prevent leakage of the smoker particles from the blocking section 3. The blocking section 3 can block the fuming particles and can enable smoke generated after the fuming particles are heated to pass through.

The smoking particle segment 2 is a filled smoking particle, such as a tobacco particle.

The solid aerosol-generating substrate further comprises an outer wrapper surrounding the foam segment 1, the smoker particle segment 2 and the plug segment 3.

Preferably, the blocking segment 3 is a rod-shaped structure formed by gathering sheets. The material of the blocking section 3 is preferably a thermally stable, low-sorption material, such as parchment paper, dust-free paper, tracing paper, transfer paper, etc.

Preferably, the outer side of the foamed substrate body has a barrier layer.

Preferably, the preparation method of the foam material segment 1 comprises the following steps:

preparing a foam-shaped matrix main body;

step (2), vacuumizing the foam-shaped substrate main body, and pumping out air in the pore structure of the foam-shaped substrate main body to obtain the vacuumized foam-shaped substrate main body;

preparing a mixed solution of one or more of smoke substances, aroma substances and tobacco substances, and then soaking the vacuumed foamed substrate main body in the mixed solution to obtain the foamed substrate main body soaked with the mixed solution;

and (4) taking out the foam matrix main body soaked with the mixed solution, and drying to obtain the foaming material section 1.

Preferably, in the step (1), the preparation method of the foam-like matrix main body comprises the following steps:

step 11) mixing polysaccharide powder, a foaming agent, a dispersing agent and a coagulating agent, and dissolving the mixture into an alcohol solution with the volume concentration of 0-15% v/v to prepare foaming solution;

step 12) filling the foaming slurry obtained in the previous step into a mould, and foaming for 10-30 minutes at a high temperature to obtain a foamed composition;

and step 13) putting the foamed composition obtained in the previous step into a freezer at the temperature of-10 to-30 ℃ for freezing for 12 to 48 hours, taking out, dehydrating and drying to obtain the foam matrix main body.

Preferably, the porosity of the foamed matrix body is between 50% and 85%. The porosity of the foamed matrix body can be controlled by controlling the foaming time and temperature as described above.

The porosity of the foam material section is 48-84%.

Preferably, in the step (11), the polysaccharide powder is selected from one or more of konjac, starch, modified starch cellulose and glucomannan; the foaming agent is selected from one or more of foaming agent AC, foaming agent H, foaming agent OBSH and foaming agent TSH; the dispersing agent is selected from one or more of OP-10, span80 and sucrose ester; the coagulant is selected from sodium carbonate.

Preferably, in step (12), the foaming conditions are foaming in an oven, a drying room or an oil bath at a temperature of 160-240 ℃.

Preferably, in step (3), the flavouring substance comprises menthol, ionone, ethyl maltol, vanillin or rose absolute flavour; the smoking material comprises a glycerin or propylene glycol smoke generator; the tobacco material comprises tobacco water extract;

the mixed solution comprises the following substances in percentage by mass: the content of flavoring substances is 10 to 25 percent, the content of smoke substances is 10 to 25 percent, and the content of tobacco substances is 50 to 80 percent;

the soaking time is 10-20 minutes.

Preferably, in the step (4), the drying mode is low-temperature drying or microwave drying, and the low-temperature drying condition is as follows: the drying temperature is 60-70 ℃, and the drying time is 0.5-1 hour; the microwave drying conditions were: the microwave power is 100-120W, and the microwave time is 10-30min; drying until the water content of the foam-shaped matrix main body is 10% -20%.

A second aspect of the invention provides an aerosol-generating article comprising: a solid aerosol-generating substrate according to any one of the first aspects, a hollow support section 4 and a filter section 5 arranged in series from upstream to downstream.

Preferably, said hollow support section 4 is of a gas-permeable or gas-impermeable material.

Preferably, the side wall of the hollow support section 4 has a vent 4-1. Ventilation holes 4-1 extend radially through the hollow support section 4.

A third aspect of the invention provides a method of making an aerosol-generating article according to the second aspect, the method comprising the steps of:

a solid aerosol generating substrate, a hollow supporting section 4 and a filtering section 5 are compounded to obtain a double-length cigarette, and then the cigarette is divided from the middle to obtain two same aerosol generating products.

The solid aerosol generating substrate is produced by using the traditional equipment for producing the particle filter tip by the cigarette, and the foaming material section 1, the fuming particle section 2 and the plugging section 3 are compounded together to obtain the solid aerosol generating substrate. The process is briefly described as follows: forming paper is used for respectively placing a foaming material section 1 and a plugging section 3 on the two sections, and a space is formed between the foaming material section 1 and the plugging section 3 and is used for filling a particle section; when the forming paper runs to the blanking area, the fuming particles fall to the space between the foaming material section 1 and the blocking section 3, and then the forming paper is rolled up to wrap the foaming material section 1, the fuming particles and the blocking section 3 to form the solid aerosol generating substrate.

Upon smoking, the foam segment 1 and the smoking particle segment 2 of the aerosol-generating article are inserted into a circumferentially heated smoking article and heated to produce an aerosol for delivery to a consumer.

A fourth aspect of the invention provides the use of an aerosol-generating article according to the first aspect for use with a circumferentially heated smoking article.

The technical scheme can be freely combined on the premise of no contradiction.

Compared with the prior art, the invention has the following beneficial effects:

1. the present invention provides for the first time a solid aerosol-generating substrate. The foaming material section 1 and the plugging section 3 are respectively plugged with fuming particles at two ends. The section 1 of the foaming material is loaded with one or more of a smoking substance, a flavoring substance and a tobacco substance. The length 1 of foamed material therefore not only has the effect of blocking the smoker particles, but it can also be heated to smoke as a core segment like the smoker particle segment 2.

2. In particular, compared to a solution using filter cotton or a blocking cap or the like to block the smoker particles upstream, the foam segment 1 of the present application has the following advantages:

the suction resistance of the filter cotton, the plugging cover and the like is large, and the adjustable range of the suction resistance is small; the foam-shaped matrix main body of the foam material section 1 has large porosity and large suction resistance adjustable range;

the foaming material section 1 of the application adsorbs smoke substances, aroma-enhancing substances, tobacco substances and the like, and can play a role in increasing the smoke quantity and/or enhancing the aroma;

in addition, even if the filter cotton is used for adsorbing smoke substances and spices, the filter cotton has poor adsorption effect compared with the foaming material section 1 of the application because the filter cotton is made of non-hydrophilic acetate fibers;

the filter cotton is not heat-resistant, is easy to deform when being heated, and influences the smoking taste.

3. The length of foamed material 1 is loaded with smoking, flavouring and tobacco materials so that it can be heated to smoke as a segment of smoking particles 2.

4. In a preferred embodiment, the foam material section 1 is made of a porous foam material made of polysaccharide powder. The foaming mainly comprises three processes of gelation, heating foaming and freezing forming. The polysaccharide substance powder forms a three-dimensional network structure under the action of a coagulant, namely gel is formed; then heating and foaming are carried out, and the foaming agent in the gel is decomposed to generate bubbles, so that a porous structure is formed; finally, the porous gel is frozen, water in the gel forms ice crystals to be separated out, the concentration of solid matters is correspondingly increased, plant molecules are more tightly combined by the extrusion of the ice crystals, so that the foam-shaped substrate main body with the pore structure is obtained by fixed molding, a large number of pore structures ensure that the foam-shaped substrate main body can adsorb and bear more smoke substances, aroma substances and tobacco substances, the pore structure of the foam-shaped substrate main body is further favorable for releasing smoke, the problem that the smoke generated at the upstream of the foaming material section 1 is intercepted by the downstream is avoided, and the smoke quantity and the smoke aroma quality are improved from two aspects.

5. This application prepares earlier and obtains the foamy matrix main part, then utilizes it as carrier absorption fuming substance, fragtant material and tobacco material, does not directly foam fuming substance, fragtant material and tobacco material and glycan material powder, foamer etc. together, the reason lies in: firstly, the addition of the smoke generating substance, the flavoring substance and the tobacco substance during the foaming process greatly affects the foaming effect, and particularly, in the case that the added tobacco substance is tobacco powder, a foam-shaped matrix main body with high porosity is difficult to obtain. Secondly, because the temperature in the foaming process is higher, generally between 160 ℃ and 240 ℃, the high temperature causes most of the smoke substances and the flavoring substances to be volatilized in the foaming process, and the smoke substances and the flavoring substances in the foam matrix really prepared are few, so the problems of small smoke amount and poor sensory evaluation of aroma in the smoking process of the foaming material section 1 are caused.

6. The invention encounters a new problem in the process of soaking and adsorbing the mixed liquid containing the smoke substance, the flavoring substance and the tobacco substance. The invention notices that in the foaming process, the bubbles in the main body of the foam-shaped substrate are combined in the releasing process, so that the pores extending along the radial direction of the foaming material section 1 and close to the central axis are smaller, and the pores close to the periphery are larger, if the obtained main body of the porous foam-shaped substrate is directly soaked in the mixed liquid containing the smoke substances, the flavoring substances and the tobacco substances by using the soaking method, or the mixed liquid is directly coated on the outer surface of the main body of the foam-shaped substrate by using the spraying method, because the peripheral pores are larger, the adsorption capacity is stronger, the pores of the inner layer are smaller, the adsorption capacity is weak, and thus the mode of applying the supplement from the periphery and then diffusing to the inner layer is larger, the diffusion resistance is larger, a large amount of the supplement is adsorbed by the pore structure of the periphery, the supplement is difficult to diffuse to the inner layer, and even the mixed liquid can not be contacted at the central axis. In order to avoid the problem, the dosage of the mixed liquor can be further increased, or the soaking time is prolonged until the pore structure of the inner layer can adsorb the supplement, but the dosage of the mixed liquor is too large, the mixed liquor of the outer layer is excessive, the macula is easy to exude, and the smoke temperature is too hot. Therefore, the method of applying the mixed liquid from the outer periphery has a problem that the amount of the mixed liquid is large or the distribution of the mixed liquid is not uniform. In order to further solve the problem, the invention firstly vacuumizes the foam-shaped matrix main body, removes air in the pore structure of the foam-shaped matrix main body, and then soaks the vacuumed foam-shaped matrix main body in the mixed liquid. Therefore, under certain external pressure, the mixed liquid can quickly enter the pore structure and smoothly enter the pore structure of the inner layer, and the method can ensure that the mixed liquid enters the pore structure of the inner layer of the foam matrix main body under the premise of shorter soaking time and less mixed liquid, so that the mixed liquid is uniformly distributed in the pore structure. The aerosol generating substrate rod obtained by the preparation method has high porosity, and the smoke substance, the aroma-enhancing substance and the tobacco substance are uniformly distributed in the pore structure, so that the aerosol generating substrate rod has the advantages of large smoke quantity, high smoke comfort and proper smoke temperature when being used in aerosol generating products.

7. The solid aerosol-generating substrate of the invention is integral so that it can be composited with the hollow support section 4 and the filter section 5. Compared with the prior art, the efficiency of filling each unit individually by the filling process is greatly improved.

8. The plugging section 3 is formed by pressing low-adsorption sheets and then gathering the low-adsorption sheets, and plays a role in plugging particles. The plugging section 3 has the characteristics of good thermal stability and small interception amount.

Drawings

Figure 1 is a schematic diagram of the structure of a solid aerosol generating substrate according to example 1.

Figure 2 is a schematic diagram of the structure of an aerosol-generating article according to example 2.

Figure 3 is a schematic view of another configuration of the aerosol-generating article of example 2.

List of reference numerals:

1. the section of foaming material 2, the section of fuming granule, 3, the shutoff section, 4, the hollow support section, 4-1, the ventilation hole, 5, the filter segment.

Detailed Description

The present invention will be described in further detail with reference to examples.

It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present. Further, "coupled" as used herein may include wirelessly coupled.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "coupled" and "provided" are to be interpreted broadly, for example, as being either fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention are understood as specific cases by those of ordinary skill in the art.

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

Example 1

As shown in fig. 1, a solid aerosol-generating substrate comprises: the device comprises a foaming material section 1, a fuming particle section 2 and a blocking section 3 which are sequentially arranged from upstream to downstream.

The length 1 of foamed material comprises a foamed substrate body having a pore structure with a smoking substance, a flavouring substance and a tobacco substance therein. The plugging section 3 is a rod-shaped structure formed by pressing, folding and gathering tracing paper sheets, and an axial airflow channel is arranged in the plugging section. The lengths of the segments are as follows: the axial length of the foaming material section 1 is 7mm, the axial length of the fuming particle section 2 is 5mm, and the axial length of the plugging section 3 is 8mm.

The preparation method of the foaming material section 1 comprises the following steps:

(1) Preparing a foamed matrix body;

(2) Vacuumizing the foam-shaped substrate main body, and pumping out air in the pore structure of the foam-shaped substrate main body;

(3) Preparing a mixed solution of a smoke substance, an aroma-enhancing substance and a tobacco substance, and then soaking the vacuumized foam-shaped substrate main body in the mixed solution;

(4) And taking out the foam matrix main body soaked with the mixed solution, and drying to obtain the foaming material section (1).

In the step (1), the preparation method of the foam-shaped matrix main body comprises the following steps:

11 Uniformly mixing the polysaccharide substance powder, the foaming agent, the dispersing agent and the coagulating agent, and dissolving the mixture into an alcohol solution with the volume concentration of 10% v/v to prepare foaming solution;

12 Uniformly dispersing the foaming slurry obtained in the previous step, then filling the mixture into a mold, and foaming the mixture for 20 minutes at a high temperature to obtain a foamed composition;

13 Placing the foamed composition obtained in the previous step into a freezer at the temperature of-20 ℃ for freezing for 36 hours, taking out, dehydrating, and naturally drying or baking to obtain the foam matrix main body.

In the step (11), the polysaccharide substance powder is selected from konjac flour; the foaming agent is selected from foaming agent AC; the dispersant is selected from Span80; the coagulant is selected from sodium carbonate. In the step (12), the foaming condition is foaming in an oven at a temperature of 200 ℃.

In the step (2), the vacuumizing condition is that the foam matrix main body is directly placed into a vacuum bag for vacuumizing, and then the mixed solution is injected into the vacuum bag filled with the foam matrix main body through a pressure relief port.

In the step (3), the flavoring substance comprises menthol; the smoking material comprises propylene glycol; the tobacco material comprises tobacco water extract. The menthol, the propylene glycol and the tobacco water extract are prepared from the following components in percentage by mass: 25:20:55. The soaking time was 15 minutes.

In the step (4), the drying mode is low-temperature drying, and the low-temperature drying condition is as follows: and drying at 65 ℃ for 0.5 hour until the water content of the foaming material section is 12%. The porosity of the foam section was tested to be 80%.

Example 2

As figure 2, an aerosol-generating article comprising: a solid aerosol-generating substrate, a hollow support section 4 and a filter section 5 arranged in sequence from upstream to downstream. A solid aerosol-generating substrate was prepared as in example 1.

The hollow supporting section 4 is an acetate hollow tube. The thickness of the tube wall is 1.0mm.

The lengths of the segments are as follows: the axial length of the hollow supporting section 4 is 15mm, and the axial length of the filtering section 5 is 10mm.

The method of making the aerosol-generating article comprises the steps of:

sequentially abutting one hollow support section 4, the double-length filter section 5 and the other hollow support section 4 and wrapping the two hollow support sections with wrap paper to obtain a binary filter stick;

compounding two solid aerosol generating substrates in the first aspect at two ends of a binary filter stick respectively, and wrapping the two solid aerosol generating substrates by using tipping paper to obtain double-length cigarettes;

and cutting the middle of the filter section 5 with double length of the double-length cigarette, and twisting and connecting tipping paper to obtain the cigarette.

The aerosol-generating article described above was denoted as sample 1. The position and material etc. of the wrapping layers in fig. 2 are of conventional design and are not indicated.

Of course, other compounding manners can be used, for example, the binary filter stick is compounded at two ends of the double-length solid aerosol generating substrate to obtain the double-length cigarette; and then cutting the middle of the double-length solid aerosol generating substrate, and rubbing and connecting tipping paper to obtain the aerosol generating product.

In another embodiment, a schematic of the structure of an aerosol-generating article is shown in figure 3. The side wall of the hollow support section 4 is provided with a vent hole 4-1 so as to communicate the cavity in the hollow support section 4 with the outside. During suction, ambient air enters the hollow support section 4 from the ventilation holes 4-1 to mix with the heated smoke of the solid aerosol-generating substrate and is drawn by the user. The outside air can increase the smoke amount, cool the smoke and enhance the mixing uniformity of the smoke. The position and material etc. of the wrapping layers in fig. 3 are of conventional design and are not indicated.

Comparative example 1

The present comparative example provides an aerosol-generating article. The only difference from example 2 is the method of preparation of the foam segments in the solid aerosol-generating substrate.

The foaming material segment is prepared by foaming the smoking substance, the flavoring substance, the tobacco substance, the polysaccharide substance powder, the foaming agent and the like. The method comprises the following specific steps:

11 Uniformly mixing polysaccharide substance powder, foaming agent, dispersing agent, coagulating agent, flavoring substance menthol, smoke substance propylene glycol and tobacco powder, and dissolving into alcoholic solution with volume concentration of 10% v/v to prepare foaming slurry;

12 Uniformly dispersing the foaming slurry obtained in the previous step, then filling the mixture into a mold, and foaming the mixture for 20 minutes at a high temperature to obtain a foamed composition;

13 Placing the foamed composition obtained in the previous step into a freezer at the temperature of-20 ℃ for freezing for 36 hours, taking out, dehydrating, and naturally drying or baking to obtain the foamed material section.

The tobacco powder can be called as tobacco dry material, which is made by crushing tobacco stem, tobacco stalk, tobacco powder and other cigarette industry waste into tobacco powder of 80-120 meshes.

The other steps were in accordance with example 1.

The resulting aerosol-generating article, designated sample 2, had a foam segment porosity of only 32%.

Comparative example 2

The present comparative example provides an aerosol-generating article. The difference to example 2 is the method of preparation of the foam segments in the solid aerosol-generating substrate. The step (2) of evacuation was omitted, and the prepared foam-like substrate body was directly immersed in the mixed solution containing the smoke generating substance, the flavoring substance and the tobacco substance, which was the same as in example 1. The resulting aerosol-generating article was prepared and referred to as sample 3.

Application example 1

Aerosol-generating article samples 1-3 were each smoked under equivalent conditions with a matched heated non-combustible cigarette smoking article. A plurality of sensory evaluation personnel perform sensory evaluation on the aerosol generating product, and 6 indexes of smoke amount, aroma, fragrance, strength, harmony, irritation and taste are mainly considered. The scoring values of the 6 quality detection indexes are respectively as follows: the amount of the smoke is 0 to 10 minutes, the fragrance and the flavor are 0 to 30 minutes, the strength is 0 to 10 minutes, the harmony is 0 to 10 minutes, the irritation is 0 to 15 minutes, the taste is 0 to 25 minutes, and the total of 6 evaluation indexes is 100 minutes. The higher the score of 5 evaluation indexes, i.e., the amount of smoke, aroma, flavor, strength, consistency, and texture, the stronger the sensation of the evaluation index during smoking, the less noticeable the sensation of the evaluation index during smoking, and the higher the total score of 6 evaluation indexes, the better the sensation of smoking of the aerosol-generating article.

The sensory evaluation scores for aerosol-generating article samples 1-3 are shown in table 1.

Mainly according to Q/YNZY.J07.022.

Table 1 sensory evaluation scores on smoking of different aerosol-generating article samples

As can be seen from the data in table 1 comparing sample aerosol-generating article 1 with sample aerosol-generating article 2, by directly foaming together the smoke, flavour and tobacco material with the polysaccharide material powder, foaming agent etc., the porosity of the resulting foamed material segment is only 32%, which directly results in sample 2 having significantly lower smoke and flavour scores than sample 1.

Comparing the aerosol-generating article 1 and the aerosol-generating article sample 3, it is clear that, even if the same foam-like substrate body is used, whether or not a vacuum is applied before the same body is soaked in the aerosol-generating article to adsorb the smoking material, the flavoring material, and the tobacco material is important for the sensory evaluation of smoking. The vacuumizing process is omitted, the prepared foam-shaped substrate main body is directly soaked in the mixed liquid containing the smoke substances, the aroma substances and the tobacco substances, and the mixed liquid in the prepared foaming material section is not uniformly distributed, so that the scores of the smoke quantity and the harmony of the sample 3 are obviously lower than those of the sample 1.

Claims (9)

1. A solid aerosol-generating substrate comprising: the device comprises a foaming material section (1), a smoke particle section (2) and a plugging section (3) which are sequentially arranged from upstream to downstream;

the section (1) of the foaming material comprises a foam-shaped substrate main body with a pore structure, wherein one or more of smoking substances, flavoring substances and tobacco substances are arranged in the pore structure;

the plugging section (3) is internally provided with an axial airflow channel.

2. A solid aerosol-generating substrate according to claim 1 in which the blocking section (3) is a rod-like structure of gathered sheets.

3. The solid aerosol generating substrate of claim 1, wherein the foamed substrate body has a barrier layer on the outside.

4. A solid aerosol-generating substrate according to claim 1, wherein the method of producing the length (1) of foamed material comprises the steps of:

preparing a foam-shaped matrix main body;

step (2) vacuumizing the foam-shaped matrix main body, and pumping out air in a pore structure of the foam-shaped matrix main body to obtain the vacuumized foam-shaped matrix main body;

preparing a mixed solution of one or more of smoke substances, aroma substances and tobacco substances, and then soaking the vacuumed foamed substrate main body in the mixed solution to obtain the foamed substrate main body soaked with the mixed solution;

and (4) taking out the foam matrix main body soaked with the mixed solution, and drying to obtain the foaming material section (1).

5. The solid aerosol-generating substrate of claim 4, wherein in step (1), the foamed substrate body is prepared by:

step 11) mixing the polysaccharide substance powder, the foaming agent, the dispersing agent and the coagulating agent, and dissolving the mixture in an alcohol solution having a volume concentration of 0 to 15% v/v, to prepare a foaming slurry;

step 12) filling the foaming slurry obtained in the previous step into a mould, and foaming for 10-30 minutes at a high temperature to obtain a foamed composition;

and step 13) placing the foamed composition obtained in the previous step into a freezer at the temperature of-10 to-30 ℃ for freezing for 12 to 48 hours, taking out, dehydrating and drying to obtain the foam matrix main body.

6. An aerosol-generating article, characterized in that the aerosol-generating article comprises: a solid aerosol-generating substrate according to any of claims 1 to 5, a hollow support section (4) and a filter section (5) arranged in that order from upstream to downstream.

7. An aerosol-generating article according to claim 6, wherein the hollow support section (4) is of an air-permeable or air-impermeable material.

8. An aerosol-generating article according to claim 6, wherein the side wall of the hollow support section (4) has ventilation holes (4-1).

9. Use of an aerosol-generating article according to claim 6 for use with a circumferentially heated smoking article.

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