Aerosol generating substrate, preparation method thereof and aerosol generating product

Abstract

The invention belongs to the technical field of heating tobacco products, and provides an aerosol generating substrate and a preparation method thereof, an aerosol generating product, the aerosol generating substrate comprises a tobacco material, an aerosol forming agent and a taste improving agent, the taste improving agent comprises a calcium phosphate compound or a composition of the calcium phosphate compound and an oxide, and the taste improving agent comprises a calcium phosphate compound or a composition of the calcium phosphate compound and the oxide. The molar ratio of the calcium element to the phosphorus element in the taste improver is 1.1-2.0. The mouth feel improver is basically stable in processing or using environments such as high temperature and the like, does not release unpleasant substances and other substances without obvious sense organ positive promotion, has the capability of mildly improving acidic mouth feel, and does not generate mouth dryness.

Description

Technical Field

[0001] This application relates to the field of heated tobacco products technology, and in particular to an aerosol generating matrix and its preparation method, and an aerosol generating product. Background Technology

[0002] Aerosol-generating products utilize heat-not-burn technology. During use, a heating device heats the aerosol-generating matrix, causing volatile compounds to vaporize. The high-temperature vaporized substances then condense through a specific airflow path to form an inhalable aerosol. Currently, there are two main types of aerosol-generating matrices: one is homogenized reconstituted tobacco material, which is produced by mixing tobacco powder, aerosol forming agents, and water in a specific ratio, followed by processes such as stirring, rolling or casting, and high-temperature dehydration; the other is tobacco material treated with aerosol forming agents, typically by spraying a liquid containing the aerosol forming agent onto tobacco, followed by impregnation and high-temperature treatment. In both processes, a large amount of reducing sugars in the tobacco are oxidized to form sugar acids, and some aroma compounds decompose or oxidize to form organic acids, resulting in an acidic taste in the final aerosol. Furthermore, during use, the aerosol-generating matrix undergoes thermal decomposition and oxidation reactions, releasing significant amounts of organic acids such as formic acid, acetic acid, glycolic acid, and butyric acid, further enhancing the acidic characteristics.

[0003] In heated tobacco products, the acidic taste of aerosols can have an adverse effect on product quality: on the one hand, acidic aerosols are easily perceived by users and leave a bad impression; on the other hand, acidic components may combine with nitrogen-containing aroma substances such as pyrazines to reduce aroma concentration, or combine with nicotine (nicotine salts) to weaken physiological satisfaction, thereby affecting the aroma characteristics and smoking satisfaction of tobacco itself.

[0004] To improve the taste of aerosols, certain tobacco additives, such as sodium hydroxide, sodium carbonate, or sodium bicarbonate, can be added. However, even small amounts of strongly alkaline substances like sodium hydroxide can cause drastic fluctuations in the pH of the aerosol, making precise control difficult. Sodium carbonate or sodium bicarbonate, on the other hand, are prone to decomposition and deterioration under high-temperature processing conditions, making their practical application challenging.

[0005] In addition, alkaline inorganic salts are also commonly used as alkaline pH adjusters in tobacco. For example, patent CN110573031B discloses a homogenized plant material comprising greater than or equal to about 60% by weight of particulate plant material, an aerosol forming agent, and an alkaline pH adjuster having a water solubility of less than or equal to about 0.1 g / 100 mL of water at 20°C and 1 atm. The homogenized plant material is used as an aerosol generating matrix in heated aerosol-generating articles. The alkaline pH adjuster comprises one or more alkaline inorganic salts selected from: magnesium bicarbonate, magnesium hydroxide, magnesium phosphate, and calcium phosphate. However, this method using alkaline inorganic salts such as calcium phosphate only significantly reduces nicotine loss during the preparation of the homogenized tobacco material's cast sheet, but has little effect on improving the acidic taste of the aerosol. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an aerosol generating matrix and its preparation method, as well as an aerosol generating product. This matrix is ​​basically stable in high-temperature processing or usage environments, does not release sensory unpleasant substances or other substances that do not significantly enhance sensory perception, has the ability to mildly improve acidic taste, and does not cause oral dryness.

[0007] To achieve the above and related objectives, the present invention employs the following technical means:

[0008] The first aspect of the present invention provides an aerosol generating matrix, comprising tobacco material, an aerosol forming agent and a taste improver, wherein the taste improver comprises a calcium phosphate compound, or comprises a composition of a calcium phosphate compound and an oxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.1 to 2.0.

[0009] The aerosol generation matrix is ​​prepared by any of the following methods:

[0010] (1) The tobacco material, aerosol forming agent and taste improver are mixed and then prepared by stirring, rolling or casting and high temperature dehydration;

[0011] (2) The aerosol forming agent and the taste improver are mixed and sprayed onto the surface of tobacco material, and then prepared after settling and drying;

[0012] (3) The aerosol forming agent and the taste improver are mixed and then sprayed onto the surface of the tobacco material for in-situ curing.

[0013] Furthermore, the calcium phosphate compound is selected from one or more of monocalcium phosphate, dicalcium phosphate, tricalcium phosphate or their hydrates, amorphous calcium phosphate, hydroxyapatite, calcium-deficient hydroxyapatite, and calcium carbonate.

[0014] Furthermore, the oxide is selected from one or more of calcium oxide, silicon oxide, iron oxide, and iron(II,III) oxide.

[0015] Furthermore, taste improvers also include milk calcium or natural bone meal.

[0016] A second aspect of the present invention provides a method for preparing an aerosol-generating matrix, which is selected from one of the following methods (a) to (c):

[0017] (a) After mixing tobacco material, aerosol forming agent and taste improver, the mixture is stirred, rolled or cast and dehydrated at high temperature in sequence to prepare an aerosol generating matrix with a thin sheet structure, wherein the tobacco material is tobacco leaf powder;

[0018] (b) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material. After settling and drying, a portion of the aerosol forming agent enters the interior of the tobacco material, while the other portion of the aerosol forming agent and the taste improver adhere to the surface of the tobacco material together, thus preparing an aerosol generating matrix. The tobacco material is tobacco shreds.

[0019] (c) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material by atomization, so that the aerosol forming agent and the taste improver are solidified in situ on the surface of the tobacco material to prepare an aerosol generating matrix, wherein the tobacco material is tobacco shreds;

[0020] In methods (a), (b), and (c), the taste improver includes a calcium phosphate compound, or a composition of a calcium phosphate compound and an oxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.1 to 2.0.

[0021] Furthermore, when the preparation method is selected from method (a), the amount of taste improver added is 0.1% to 3% of the weight of the tobacco material.

[0022] Furthermore, the particle size of the taste improver is 1 nm to 200 μm.

[0023] Furthermore, when the preparation method is selected from method (b) or method (c), the amount of taste improver added is 0.1% to 8% of the weight of the tobacco material.

[0024] Further, when the preparation method is selected from method (c), the suspension also includes a thickener selected from one or more of xanthan gum, guar gum, tamarind gum, pachycarboxylic acid polysaccharide, alginate, cellulose, nanocellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and sodium carboxymethylcellulose. A third aspect of the present invention provides an aerosol generating article, comprising the above-described aerosol generating matrix and a material component in contact with the aerosol generating matrix, wherein the aerosol generating matrix is ​​prepared according to the above-described preparation method.

[0025] The beneficial technical effects of this invention are as follows:

[0026] Calcium phosphate compounds (such as dicalcium phosphate, tricalcium phosphate, and hydroxyapatite) are widely used in the food industry (as leavening agents and calcium fortifiers) as pH adjusters / buffers. This invention creatively applies them to the specific field of heated cigarettes. Calcium phosphate compounds are strong base-weak acid salts. Most calcium phosphate compounds with a calcium-to-phosphorus ratio (Ca / P) of not less than 1.1 exhibit good thermal stability, such as dicalcium phosphate, tricalcium phosphate, and hydroxyapatite, and have poor solubility, resulting in weakly alkaline aqueous solutions. They have a mild effect on regulating the pH of the aerosol-forming matrix. This invention creatively discovers through experiments that calcium phosphate compounds with a calcium-to-phosphorus ratio (Ca / P) between 1.1 and 2.0 significantly and mildly improve the oral acidity characteristics of heated cigarette aerosols. By adding substances such as calcium oxide or calcium carbonate, the calcium-to-phosphorus ratio can be adjusted. Controlling the calcium-to-phosphorus ratio can regulate the aerosol's mouthfeel characteristics. When the calcium-to-phosphorus ratio is between 1.6 and 1.7, the aerosol-generated product exhibits the best mouthfeel and physiological strength.

[0027] Furthermore, the smoke produced by heating natural tobacco is acidic due to the presence of organic acids such as acetic acid and butyric acid, resulting in a poor mouthfeel. Compared to homogenized tobacco materials, when natural tobacco is used as an aerosol generating matrix for heated tobacco, it does not undergo a pulping process. Methods such as mixing pH adjusters into the pulp to reduce nicotine loss and enhance nicotine release are difficult to achieve ideal results in this type of aerosol generating matrix. This invention creatively discovers through experiments that introducing a taste improver with a specific calcium-to-phosphorus ratio into this type of smoking material can directly suppress the acidic sensation in the mouth and enhance the physiological impact of nicotine without changing the pH of the tobacco substrate.

[0028] This invention uses specific taste improvers to ensure that the prepared aerosol generating matrix can be used in high-temperature environments of 100°C to 350°C without releasing substances that are unpleasant to the senses. It also has the characteristic of gently correcting the acidic taste characteristics of aerosols, so as not to cause a dry feeling in aerosol generating products.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0030] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0031] The present invention provides an aerosol generating matrix, comprising tobacco material, an aerosol forming agent and a taste improver, wherein the taste improver comprises a calcium phosphate compound, or comprises a composition of a calcium phosphate compound and an oxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.1 to 2.0.

[0032] The aerosol generation matrix is ​​prepared by any of the following methods:

[0033] (1) The tobacco material, aerosol forming agent and taste improver are mixed and then prepared by stirring, rolling or casting and high temperature dehydration;

[0034] (2) The aerosol forming agent and the taste improver are mixed and sprayed onto the surface of tobacco material, and then prepared after settling and drying;

[0035] (3) The aerosol forming agent and the taste improver are mixed and then sprayed onto the surface of the tobacco material for in-situ curing.

[0036] Furthermore, the molar ratio of calcium to phosphorus in the taste improver of this application is preferably 1.5 to 1.8, more preferably 1.6 to 1.7.

[0037] Furthermore, the calcium phosphate compound is selected from one or more of monocalcium phosphate, dicalcium phosphate, tricalcium phosphate or their hydrates, amorphous calcium phosphate, hydroxyapatite, calcium-deficient hydroxyapatite, and calcium carbonate.

[0038] Furthermore, the oxide is selected from one or more of calcium oxide, silicon oxide, iron oxide, and iron(II,III) oxide.

[0039] Furthermore, the taste improver of this application is preferably hydroxyapatite, calcium carbonate, calcium oxide, silicon dioxide, or a combination thereof.

[0040] Furthermore, taste improvers also include milk calcium or natural bone meal.

[0041] The present invention also provides a method for preparing an aerosol generating matrix, which is selected from one of the following methods (a) to (c):

[0042] (a) After mixing tobacco material, aerosol forming agent and taste improver, the mixture is stirred, rolled or cast and dehydrated at high temperature in sequence to prepare an aerosol generating matrix with a thin sheet structure, wherein the tobacco material is tobacco leaf powder;

[0043] (b) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material. After settling and drying, a portion of the aerosol forming agent enters the interior of the tobacco material, while the other portion of the aerosol forming agent and the taste improver adhere to the surface of the tobacco material together, thus preparing an aerosol generating matrix. The tobacco material is tobacco shreds.

[0044] (c) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material by high-temperature atomization, so that the aerosol forming agent and the taste improver are solidified in situ on the surface of the tobacco material to prepare an aerosol generating matrix, wherein the tobacco material is tobacco shreds;

[0045] In methods (a), (b), and (c), the taste improver includes a calcium phosphate compound, or a composition of a calcium phosphate compound and an oxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.1 to 2.0.

[0046] Furthermore, the aerosol forming agents in this application include glycerol, propylene glycol, glycerides, tetraethylene glycol, erythritol, etc.

[0047] Furthermore, when the preparation method is selected from method (a), the amount of taste improver added is 0.1% to 3% of the weight of the tobacco material.

[0048] Specifically, in this step, the taste improver is either directly mixed into the tobacco material or added in any process before high-temperature drying.

[0049] Specifically, in this step, the tobacco material can be selected from tobacco dust, shredded tobacco, tobacco stems, etc. The mass ratio of tobacco material, aerosol forming agent and aqueous solution, stirring speed, rolling or casting, and high-temperature drying process parameters can be selectively adjusted according to the actual needs of the aerosol generation matrix, and are not specifically limited here.

[0050] Furthermore, the particle size of the taste improver is 1 nm to 200 μm, preferably nanoscale, such as 10 nm to 100 nm.

[0051] Furthermore, when the preparation method is selected from method (b) or method (c), the amount of taste improver added is 0.1% to 8% of the weight of the tobacco material.

[0052] Specifically, in method (b) or method (c), a diluent may be added to the suspension, which may be an ethanol solution or an aqueous solution.

[0053] Specifically, in method (b) or method (c), the proportions of each raw material in the suspension, the spraying time and speed, the settling time, and the drying process parameters can be selectively adjusted according to the actual needs of the aerosol generation matrix, without specific limitations here.

[0054] Furthermore, in method (c), the suspension also includes a thickener selected from one or more of xanthan gum, guar gum, tamarind polysaccharide gum, pachycarboxylic acid polysaccharide, alginate, cellulose, nanocellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and sodium carboxymethylcellulose. Moreover, when using method (c), since the aerosol forming agent is a high-viscosity liquid that can affect the later stages of cigarette production, this application adds a thickener to the suspension so that the atomized small suspension droplets can quickly solidify into solid particles on the surface of the tobacco (wherein, the taste improver is also completely encapsulated in the solid particles). In this method, rapid solidification without high temperature is possible through optimized formulation.

[0055] The present invention also provides an aerosol generating article, comprising the above-mentioned aerosol generating matrix and a material component that abuts against the aerosol generating matrix, wherein the aerosol generating matrix is ​​prepared according to the above-mentioned preparation method, and the material component has the functions of reducing aerosol temperature and filtering aerosol.

[0056] The present invention will be described in detail below through specific examples and embodiments. It should also be understood that the following embodiments are only for specific illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0057] Example 1

[0058] Tobacco powder, water, glycerol, hydroxyapatite, monocalcium phosphate, calcium oxide, and silicon dioxide were sequentially mixed, stirred, cast, and dried at high temperature to prepare homogenized reconstituted tobacco material. The amount of taste improver (hydroxyapatite, calcium oxide, and silicon dioxide) added was 0.1% of the weight of the tobacco material; the particle size of the taste improver was 60 nm; and the molar ratio of calcium to phosphorus in the taste improver was 1.1.

[0059] Example 2

[0060] The difference between this embodiment and Embodiment 1 is that the taste improver is hydroxyapatite, monocalcium phosphate, and silicon dioxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.6.

[0061] Example 3

[0062] The difference between this embodiment and Embodiment 1 is that the taste improver is hydroxyapatite, tricalcium phosphate, and silicon dioxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.7.

[0063] Example 4

[0064] The difference between this embodiment and Embodiment 1 is that the molar ratio of calcium to phosphorus in the taste improver is 2.0.

[0065] Example 5

[0066] The difference between this embodiment and Embodiment 2 is that the amount of taste improver added is 3% of the weight of the tobacco material.

[0067] Example 6

[0068] The difference between this embodiment and Embodiment 2 is that the particle size of the taste improver is 100 μm.

[0069] Example 7

[0070] The difference between this embodiment and Embodiment 2 is that the particle size of the taste improver is 1~5nm.

[0071] Example 8

[0072] The difference between this embodiment and Embodiment 2 is that the particle size of the taste improver is 200 μm.

[0073] Example 9

[0074] (1) Mix the taste improver (hydroxyapatite, monocalcium phosphate, calcium oxide, silicon dioxide), glycerol and ethanol solution, and hydroxyethyl cellulose to prepare a suspension;

[0075] (2) The suspension is sprayed onto the surface of the tobacco shreds and dried (or dried at low temperature) to prepare tobacco shreds for aerosol generation products. The amount of taste improver added is 0.1% of the weight of the tobacco material; the molar ratio of calcium to phosphorus in the taste improver is 1.6.

[0076] Example 10

[0077] The difference between this embodiment and embodiment 9 is that the amount of taste improver added is 8% of the weight of the tobacco material.

[0078] Comparative Example 1

[0079] The difference between this comparative example and Example 1 is that the molar ratio of calcium to phosphorus in the taste improver is 1.0.

[0080] Comparative Example 2

[0081] The difference between this comparative example and Example 1 is that the molar ratio of calcium to phosphorus in the taste improver is 2.1.

[0082] Comparative Example 3

[0083] The homogenized reconstituted tobacco material is prepared by mixing tobacco material, glycerin and aqueous solution, followed by stirring, casting and high-temperature drying.

[0084] Comparative Example 4

[0085] (1) A suspension was prepared by mixing glycerol with an ethanol solution and hydroxyethyl cellulose;

[0086] (2) Spray the suspension onto the surface of the tobacco shreds and dry it (or dry it at low temperature) to prepare tobacco shreds for aerosol generation products.

[0087] Comparative Example 5

[0088] The difference between this comparative example and Example 1 is that the amount of taste improver added is 5% of the weight of the tobacco material.

[0089] Comparative Example 6

[0090] The difference between this comparative example and Example 9 is that the amount of taste improver added is 10% of the weight of the tobacco material.

[0091] Performance testing

[0092] Sensory evaluation: Aerosol generating matrices of each embodiment and each comparative example were made into aerosol generating products, heated using the same aerosol generating device, and sensory evaluation was performed separately. The acidity was divided into five levels from weak to strong: none, slightly acidic, slightly acidic, quite acidic, and acidic. Other typical taste characteristics were listed after the acidity level. The evaluation results are shown in Table 1.

[0093] Smoke pH: Aerosol generating products were prepared from the aerosol generating matrices of each embodiment and comparative example, and their smoke pH values ​​were measured. The pH measurement procedure was as follows: the aerosol generating products were sampled and adjusted according to GB / T 16447—2004. Samples were aspirated in HCl mode with 8 aspiration ports. Four sample smoke particulate matter samples were collected from each Cambridge filter. The Cambridge filters containing smoke particulate matter were transferred to 50 mL stoppered conical flasks. The filter was wiped twice with degreased cotton and placed into the conical flasks. 20 mL of an extraction solution with a volume ratio of isopropanol to water of 1:1 was added to the conical flasks. The flasks were stoppered and shaken on a vortex mixer for 30 min. The conical flasks were removed and placed in the dark for 1 h. The supernatant was collected, and the pH value of the solution was measured using a calibrated pH meter. Each sample was measured twice in parallel, and the average value was taken. The test results are shown in Table 1.

[0094] The experimental data and analysis are as follows:

[0095] Table 1

[0096]

[0097] As shown in Table 1, the formulations in Examples 2, 3, 4, and 7 of this application have the best effect, which can gently correct the acidic taste characteristics of aerosols; in Examples 5, 6, and 8, although the aerosol products produced a dry feeling, the acidity is basically controlled; Examples 1 and 9 show that a moderate increase in the pH of the smoke is beneficial to improving the acidic taste, while Example 10 shows that a higher pH is not necessarily better, so the pH needs to be controlled within a certain range.

[0098] If the molar ratio of calcium to phosphorus in the comparative taste improver exceeds the range specified in this application or if the taste improver of this application is not used, the aerosol products prepared will either be too acidic or have a rough taste and poor quality.

[0099] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An aerosol generation matrix, characterized in that, The product includes tobacco materials, aerosol forming agents, and taste improvers, wherein the taste improvers include calcium phosphate compounds, or a combination of calcium phosphate compounds and oxides, and the molar ratio of calcium to phosphorus in the taste improvers is 1.1 to 2.

0. The aerosol generation matrix is ​​prepared by any of the following methods: (1) The tobacco material, the aerosol forming agent and the taste improver are mixed and then prepared by stirring, rolling or casting and high-temperature dehydration; (2) The aerosol forming agent and the taste improver are mixed and sprayed onto the surface of the tobacco material, and then the mixture is allowed to settle and dry. (3) The aerosol forming agent and the taste improver are mixed and then sprayed onto the surface of the tobacco material by atomization and cured in situ.

2. The aerosol generation matrix according to claim 1, characterized in that, The calcium phosphate compound is selected from one or more of monocalcium phosphate, dicalcium phosphate, tricalcium phosphate or their hydrates, amorphous calcium phosphate, hydroxyapatite, calcium-deficient hydroxyapatite, and calcium carbonate.

3. The aerosol generation matrix according to claim 1, characterized in that, The oxide is selected from one or more of calcium oxide, silicon oxide, iron oxide, and iron(II,III) oxide.

4. The aerosol generation matrix according to claim 1, characterized in that, The taste improvers also include milk calcium or natural bone meal.

5. A method for preparing an aerosol generation matrix, characterized in that, The preparation method is selected from one of the following methods (a) to (c): (a) After mixing tobacco material, aerosol forming agent and taste improver, the mixture is stirred, rolled or cast and dehydrated at high temperature in sequence to prepare an aerosol generating matrix with a thin sheet structure, wherein the tobacco material is tobacco leaf powder; (b) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material. After settling and drying, a portion of the aerosol forming agent enters the interior of the tobacco material, and another portion of the aerosol forming agent and the taste improver adhere together to the surface of the tobacco material to prepare the aerosol generating matrix, wherein the tobacco material is tobacco shreds; (c) After mixing the aerosol forming agent and the taste improver to form a suspension, the suspension is sprayed onto the surface of the tobacco material by atomization, so that the aerosol forming agent and the taste improver are solidified in situ on the surface of the tobacco material to prepare the aerosol generating matrix, wherein the tobacco material is tobacco shreds; In methods (a), (b), and (c), the taste improver comprises a calcium phosphate compound, or a composition of a calcium phosphate compound and an oxide, and the molar ratio of calcium to phosphorus in the taste improver is 1.1 to 2.

0.

6. The preparation method according to claim 5, characterized in that, When the preparation method is selected from method (a), the amount of the taste improver added is 0.1% to 3% of the weight of the tobacco material.

7. The preparation method according to claim 6, characterized in that, The particle size of the taste improver is 1 nm to 200 μm.

8. The preparation method according to claim 5, characterized in that, When the preparation method is selected from method (b) or method (c), the amount of the taste improver added is 0.1% to 8% of the weight of the tobacco material.

9. The preparation method according to claim 8, characterized in that, When the preparation method is selected from method (c), the suspension further includes a thickener selected from one or more of xanthan gum, guar gum, tamarind polysaccharide gum, pachycarboxylic acid polysaccharide, alginate, cellulose, nanocellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, and sodium carboxymethylcellulose.

10. An aerosol-generating product, characterized in that, The aerosol generating matrix includes an aerosol generating matrix and a material component that contacts the aerosol generating matrix, wherein the aerosol generating matrix is ​​the aerosol generating matrix according to any one of claims 1 to 4, or the aerosol generating matrix prepared by the preparation method according to any one of claims 5 to 9.

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