Aerosol generating article, solution of an aerosol generating agent, method of making and use thereof

Abstract

The application discloses an atomizing agent solution with improved moisture-proof capability of an aerosol generating article, which is used in an aerosol generating article, and comprises a metal salt and an atomizing agent, the metal salt is dissolved in the atomizing agent through ion-dipole interaction and is combined with the atomizing agent through hydrogen bond, wherein the atomizing agent is selected from one or more of glycerol, propylene glycol or butylene glycol, and the metal salt is selected from one or more of calcium chloride, magnesium chloride, aluminum chloride, sodium chloride, potassium chloride or zinc chloride. The above technical scheme can effectively reduce the hygroscopicity of the atomizing agent solution, thereby greatly improving the moisture-proof performance of the aerosol generating article. The application also discloses a preparation method of the atomizing agent solution. The application also discloses an application of the atomizing agent solution in improving the moisture-proof capability of the aerosol generating article and an aerosol generating article.

Description

Technical Field

[0001] This invention belongs to the field of novel tobacco technology, specifically relating to an atomizing agent solution, its preparation method and application, and an aerosol-generating product. Background Technology

[0002] Aerosol-generated products (i.e., heated tobacco products) involve no combustion process, resulting in significantly lower levels of harmful components in their smoke compared to traditional cigarettes. However, this also means they cannot achieve the same smoke effect as traditional cigarettes during inhalation. To address this, current technologies often incorporate large amounts of atomizing agents (such as glycerol and propylene glycol) into the aerosol-forming matrix of aerosol-generated products to increase smoke release. However, the polyhydroxy structure of these atomizing agents makes them highly hygroscopic, leading to moisture absorption, dampness, and mold growth during storage and transportation. On one hand, excess moisture absorption reduces smoke release during heating, affecting taste, especially under high humidity conditions where the tobacco material readily absorbs moisture. On the other hand, the tobacco material with added atomizing agents is softer and more prone to clumping after absorbing moisture, increasing the difficulty of the rolling process and complicating manufacturing. Therefore, moisture-proofing treatment is necessary for aerosol-generated products to maintain their quality and extend their shelf life.

[0003] Currently, moisture-proofing measures for tobacco products mainly include physical moisture-proofing technologies, chemical moisture-proofing treatments, and improvements in packaging technology. Physical moisture-proofing involves controlling the humidity of the storage environment to inhibit moisture absorption by tobacco in aerosol-generating products. Common practices include installing dehumidifiers in warehouses and using desiccants. While these methods can effectively control humidity in the short term, they are easily affected by fluctuations in the external environment, and dehumidifiers consume a lot of energy, requiring frequent replacement of desiccants, which is inconvenient and leads to increased long-term operating costs. Chemical moisture-proofing treatments typically involve adding hygroscopic agents, hydrophobic agents, or other chemical moisture-proofing agents to tobacco to reduce moisture absorption. For example, moisture-proofing sprays are applied directly to the surface of tobacco or silica gel, activated carbon, and other substances are added to the tobacco to absorb moisture. However, these added ingredients may adversely affect the composition, aroma, and flavor of the tobacco and may leave harmful residues, posing potential risks to product safety and consumer health. Furthermore, the effectiveness of these moisture-proofing ingredients is limited under high humidity conditions. Packaging improvements enhance moisture-proofing capabilities by modifying the packaging materials for aerosol-generating products. While this method can alleviate the moisture absorption problem of products to some extent, it is relatively expensive and difficult to meet environmental standards.

[0004] Existing technologies also employ membrane coating to encapsulate the atomizing agent within a membrane, thereby preventing the aerosol forming agent from contacting moisture in the external environment and reducing the risk of moisture absorption. However, this method has a relatively complex manufacturing process and is not easily applicable on a large scale. Furthermore, the membrane's stability may decrease over time, making it impossible to maintain the moisture-proof effect in the long term. Summary of the Invention

[0005] The present invention provides the following technical solutions to solve the above-mentioned technical problems.

[0006] This invention provides an atomizing agent solution that improves the moisture resistance of aerosol-generating products. The atomizing agent solution comprises a metal salt and an atomizing agent. The metal salt dissolves in the atomizing agent through ion-dipole interactions and combines with the atomizing agent through hydrogen bonds. The atomizing agent is selected from one or more of glycerol, propylene glycol, or butanediol, and the metal salt is selected from one or more of calcium chloride, magnesium chloride, aluminum chloride, sodium chloride, potassium chloride, or zinc chloride.

[0007] The above technical solution can effectively reduce the hygroscopicity of the atomizing agent solution, thereby significantly improving the moisture-proof performance of aerosol-generated products.

[0008] Optionally, the molar ratio of metal salt to atomizing agent is 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:1.

[0009] Optionally, the viscosity of the atomizing agent solution is 8000-12000 mPa·S, 12000-16000 mPa·S, or 16000-20000 mPa·S.

[0010] The present invention also discloses a method for preparing the atomizing agent solution in any of the above embodiments, the method comprising: stirring the atomizing agent and the metal salt under heating to obtain the atomizing agent solution, wherein the heating temperature is 80℃-120℃.

[0011] Using the above technical solution, atomizing agent solution with good moisture-proof performance can be prepared quickly.

[0012] Optionally, the stirring time is 5-15 hours.

[0013] Optionally, heating and stirring are carried out under inert gas conditions.

[0014] Optionally, the heating temperature is 80℃-100℃, and the stirring time is 6h-8h.

[0015] Optionally, the molar ratio of metal salt to atomizing agent is 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:1.

[0016] This invention also discloses the application of an atomizing agent solution in improving the moisture resistance of aerosol-generated products.

[0017] By adopting the above technical solution, the moisture-proof effect of aerosol-generated products can be improved.

[0018] The present invention also discloses an aerosol generating article with high moisture resistance, the aerosol generating article comprising a smoke generating section, the smoke generating section comprising an aerosol generating matrix and an atomizing agent solution in any of the above embodiments.

[0019] Using the above technical solution, the aerosol-generated product has a good moisture-proof effect. Attached Figure Description

[0020] Figure 1 Photographs of the atomizing agent solutions in Examples 1-6 of the present invention are shown;

[0021] Figure 2 A schematic diagram showing the infrared spectral detection results of the atomizing agent solution of Example 1 of the present invention and the pure glycerol of Comparative Example 1 is presented.

[0022] Figure 3 The diagram shows the 1H NMR spectrum detection results of the atomizing agent solution of Example 1 and the pure glycerol of Comparative Example 1. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0024] The term "aerosol-generating article" is used herein to refer to an article that, when heated, can generate an inhalable aerosol and deliver it to a consumer. An "aerosol-generating article" comprises an aerosol-forming substrate and a filter portion, and may be, for example, a heated cigarette made by wrapping an aerosol-forming substrate, such as tobacco, in paper and combining it with a filter. The aerosol-generating article is used in conjunction with an aerosol-generating device for heating or by employing other heat-non-combustible methods to generate an aerosol for inhalation.

[0025] The term "smoke-generating section" is used herein to describe articles comprising an aerosol-forming substrate that can be heated to generate an aerosol and delivered to a consumer. The term "aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds upon heating to generate an aerosol. During use, the volatile compounds are released from the aerosol-forming substrate via heat transfer. The smoke-generating section may be a solid smoke-generating section. The smoke-generating material may include tobacco-containing material containing volatile tobacco flavor compounds released from the substrate upon heating. The smoke-generating material may include non-tobacco materials. The smoke-generating section may include an aerosol-forming agent. The aerosol-forming agent may include at least one of glycerol and propylene glycol. In embodiments where the smoke-generating material is solid, the solid smoke-generating material may include one or more of the following: powder, granules, pellets, fragments, tubes, strips, or sheets, containing one or more of the following: herbaceous leaves, tobacco leaves, tobacco rib sheets, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. The solid smoke-generating material may be in loose form. The smoke-generating section may include a rod of solid smoke-generating material. Packaging materials can wrap the solid smoke-generating rod, and the packaging materials include paper.

[0026] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] The polyhydroxy structure of the atomizing agent gives it strong hydrophilicity, making it prone to absorbing moisture from the air, thus causing aerosol-generating products (heated cigarettes) to become susceptible to moisture. Therefore, this invention provides an atomizing agent solution specifically for such aerosol-generating products. Furthermore, this invention provides an atomizing agent solution that improves the moisture resistance of aerosol-generating products. This atomizing agent solution comprises a metal salt and an atomizing agent. The metal salt dissolves in the atomizing agent through ion-dipole interactions and bonds to the atomizing agent through hydrogen bonds. The atomizing agent is selected from one or more of glycerol, propylene glycol, or butanediol. Considering that this atomizing agent solution is specifically designed for aerosol-generating products inhaled by users, to ensure user safety, the metal salt is selected from one or more of calcium chloride, magnesium chloride, aluminum chloride, sodium chloride, potassium chloride, or zinc chloride.

[0029] Metal salts consist of metallic and non-metallic components. During the process of the metal salt dissolving in the atomizing agent and bonding with it through hydrogen bonds, the non-metallic component (such as chlorine) acts as a hydrogen bond acceptor, forming hydrogen bonds with the hydroxyl (-OH) hydrogen atoms in the atomizing agent. Simultaneously, the metallic component (such as calcium) bonds with oxygen atoms in the atomizing agent through ion-dipole interactions, facilitating the dissolution of the metal salt. Since most of the hydroxyl groups in the atomizing agent form hydrogen bonds with the metal salt, the possibility of hydroxyl groups in the atomizing agent forming hydrogen bonds with water molecules in the air is effectively reduced. This reduces the hygroscopicity of the atomizing agent, thereby significantly improving the moisture-proof performance of aerosol-generating products.

[0030] Studies have found that different types of metal salts exhibit varying strengths in the ion-dipole interaction between their metallic components and the atomizing agent, as well as differences in the hydrogen bonding between their non-metallic components and the atomizing agent. The combined effect of the ion-dipole interaction between the metallic component of the metal salt and the atomizing agent, and the hydrogen bonding formed between the non-metallic component and the hydroxyl hydrogen in the atomizing agent, influences the final moisture-proof performance. Further research revealed that using calcium chloride as the metal salt and glycerol (glycerol) as the atomizing agent results in the optimal moisture-proof performance for aerosol-generating products.

[0031] Compared to existing technologies that use membrane coating to encapsulate the atomizing agent, the atomizing agent solution provided by this invention forms stable hydrogen bonds between the metal salt and the hydroxyl groups in the atomizing agent. Simultaneously, the metal ions in the metal salt (such as Ca²⁺)... 2 The aerosol binds to oxygen atoms in the atomizing agent through ion-dipole interactions. This robust molecular-level bonding (including hydrogen bonds and ion-dipole interactions) significantly enhances the structural stability of the atomizing agent solution, ensuring excellent moisture resistance during long-term storage and thus guaranteeing that the quality of aerosol-generated products remains unaffected. Furthermore, based on its superior moisture resistance, this invention can significantly reduce the investment in subsequent moisture-proofing measures, thereby substantially reducing investment costs and operational complexity.

[0032] Furthermore, if all the hydroxyl groups in the atomizing agent form stable hydrogen bonds with the metal salt, reaching a saturated state, they will no longer combine with water molecules in the air, thus completely blocking the atomizing agent's water absorption. This allows for an increase in the quality of the metal salt in the atomizing agent solution. However, the solubility of the metal salt in the atomizing agent is limited; excessively high quality can lead to incomplete dissolution, and such incompletely dissolved atomizing agent solutions are unsuitable for use in aerosol-generating products. Therefore, this invention controls the molar ratio of the metal salt to the atomizing agent within the range of 0.01:1 to 0.12:1, and more specifically, 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:1. This effectively blocks the combination of the hydroxyl groups in the atomizing agent with water molecules in the air, significantly reducing its water absorption, while also ensuring the stability and processability of the solution, making it easy to apply in aerosol-generating products. Specifically, the molar ratio of metal salt to atomizing agent is controlled within the range of 0.08:1 to 0.10:1.

[0033] Furthermore, the viscosity of the atomizing agent solution is 8000-20000 mPa·s, and more specifically, 8000-12000 mPa·s, 12000-16000 mPa·s, or 16000-20000 mPa·s. Controlling the viscosity within this range ensures that the atomizing agent solution is uniformly dispersed within the aerosol-generating product when applied, thereby improving the atomization effect and enhancing the user's inhalation experience. In particular, the viscosity of the atomizing agent solution is 9000-10000 mPa·s.

[0034] The present invention also discloses a method for preparing the atomizing agent solution in any of the above embodiments, the method comprising: stirring the atomizing agent and the metal salt under heating to obtain the atomizing agent solution, wherein the heating temperature is 80℃-120℃.

[0035] Heating can increase the solubility of metal salts in the atomizing agent, and stirring can accelerate the dissolution rate. Since the formation of hydrogen bonds requires energy, the temperature cannot be too low; however, excessively high temperatures can lead to the formation of byproducts such as ethers between the atomizing agents. Therefore, the temperature needs to be controlled within the aforementioned range, which satisfies the energy requirements for hydrogen bond formation while effectively suppressing side reactions. This preparation method is simple, easy to scale up, and has low cost. It can rapidly produce atomizing agent solutions with good moisture-proof properties.

[0036] Furthermore, in the above embodiments, the heating temperature is 80℃-120℃, and the stirring time is 5h-15h. This invention, by heating at 80℃-120℃ and stirring for 5h-15h, can make the hydrogen bonds and ion-dipole interactions between the metal salt and the atomizing agent more stable, thereby improving the structural stability and moisture-proof performance of the atomizing agent solution, and thus ensuring that the quality of the aerosol-generated product does not change with storage time.

[0037] Furthermore, in the above embodiments, heating and stirring are carried out under inert gas conditions. This effectively prevents moisture in the air from contacting the atomizing agent, thereby preventing the atomizing agent from absorbing moisture and ensuring that the hydroxyl groups in the atomizing agent form hydrogen bonds with the metal salt. When this atomizing agent solution is then applied to an aerosol-generating product, the product can release sufficient vapor under heating without affecting the taste. The inert gas is selected from one or more of argon, helium, or nitrogen.

[0038] Furthermore, the heating temperature was 80℃-100℃, and the stirring time was 6h-8h. Studies have found that stirring at this temperature for 6h-8h ensures that the obtained atomizing agent solution has uniform dispersion and stable intermolecular interactions, thereby further improving the moisture-proof performance and long-term stability of the atomizing agent solution, ensuring the quality of the aerosol-generated product, and reducing the time and cost of subsequent moisture-proofing measures for the aerosol-generated product. Even further, the heating temperature was 80-85℃. The atomizing agent solution obtained at this temperature has even better moisture-proof performance and structural stability. Studies have found that using an atomizing agent solution prepared at this temperature using calcium chloride and glycerin in aerosol-generated products results in the aerosol-generated product absorbing only 20% of its water after 7 days of storage.

[0039] Further, in the above embodiments, the molar ratio of the metal salt to the atomizing agent is 0.01:1 to 0.12:1. More specifically, it can be 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:1. Controlling the molar ratio of the metal salt to the atomizing agent within the above range, and preparing the atomizing agent solution at the above temperature and stirring time, ensures that the prepared atomizing agent solution has good moisture-proof performance, structural stability, and processability. In particular, the molar ratio of the metal salt to the atomizing agent is 0.09:1 to 0.10:1. This ensures that the prepared atomizing agent solution has the best moisture-proof performance, better structural stability, and processability.

[0040] This invention also discloses the application of an atomizing agent solution in improving the moisture resistance of aerosol-generated products.

[0041] By adopting the above technical solution, the moisture-proof effect of aerosol-generated products can be improved.

[0042] The present invention also discloses an aerosol generating article, which includes a smoke-generating section comprising an aerosol generating matrix and an atomizing agent solution as described in any of the above embodiments. Furthermore, this aerosol generating article is an aerosol generating article with high moisture-proof performance.

[0043] Using the above technical solution, the aerosol-generated product has a good moisture-proof effect.

[0044] The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0045] Example 1

[0046] Calcium chloride and glycerol were mixed in a molar ratio of 0.01:1 and stirred in air at 80°C for 15 hours, then cooled to obtain an atomizing agent solution.

[0047] Example 2

[0048] Calcium chloride and glycerol were mixed in a molar ratio of 0.05:1 and stirred in air at 100°C for 10 hours, then cooled to obtain an atomizing agent solution.

[0049] Example 3

[0050] Calcium chloride and glycerol were mixed in a molar ratio of 0.12:1 and stirred in air at 120°C for 5 hours, then cooled to obtain an atomizing agent solution.

[0051] Example 4

[0052] Calcium chloride and glycerol were mixed in a molar ratio of 0.10:1 and stirred in air at 80°C for 6 hours, then cooled to obtain an atomizing agent solution.

[0053] Example 5

[0054] Zinc chloride and glycerol were mixed in a molar ratio of 0.10:1 and stirred in air at 80°C for 6 hours, then cooled to obtain an atomizing agent solution.

[0055] Example 6

[0056] Sodium chloride and glycerol were mixed in a molar ratio of 0.10:1 and stirred in air at 80°C for 6 hours, then cooled to obtain an atomizing agent solution.

[0057] Figure 1 The atomizing agent solutions obtained in Examples 1-6 are shown (from left to right: atomizing agent solutions obtained in Examples 1, 2, 3, 4, 5, and 6). According to... Figure 1 It can be seen that the atomizing agent solutions obtained in Examples 1-6 are all colorless and transparent liquids.

[0058] The atomizing agent solution of Example 1 and pure glycerol (Comparative Example 1) were then subjected to infrared spectroscopy detection, and the results are as follows: Figure 2 As shown ( Figure 2 In the diagram, red line A represents the infrared spectrum detection result of the atomizing agent solution in Example 1, and black line B represents the infrared spectrum detection result of pure glycerol. The results show that Example 1, at 1550 cm⁻¹, [achieved optimal performance]. -1 The peak at 3400–3500 cm⁻¹ indicates that glycerol and CaCl₂ form a stable supramolecular homogeneous system; meanwhile, in Example 1, the peak at 3400–3500 cm⁻¹ is a Ca-Cl bond peak, proving that glycerol and CaCl₂ form a stable supramolecular homogeneous system; (Note: The last part, "3400–3500 cm⁻¹", appears to be an -1 The increased strength at this point indicates that CaCl2 has formed a strong hydrogen bond with glycerol.

[0059] The nebulizer solution from Example 1 was then dissolved in deuterated water (used as a solvent for the NMR experiment) and subjected to 1H NMR spectroscopy. Simultaneously, pure glycerol (Comparative Example 1) was also dissolved in deuterated water and subjected to 1H NMR spectroscopy. The detection results are as follows... Figure 3 As shown ( Figure 3 In the diagram, red line C represents the 1H NMR spectrum of the atomizing agent solution from Example 1, and black line D represents the 1H NMR spectrum of pure glycerol. According to... Figure 3 It can be seen that in deuterated water, the elution peak of the nebulizer solution in Example 1 at the chemical shift of 4.3 to 4.6 was significantly shifted compared with that of pure glycerol in 1H NMR. This also confirms that CaCl2 and glycerol formed strong hydrogen bonds, thereby forming a supramolecular unified body.

[0060] Next, the atomizing agent solutions of each embodiment were directly mixed with heated non-combustible cigarette powder and adhesive, and then rolled to obtain aerosol-generated products (thin cigarettes). A portion of the obtained aerosol-generated products were placed in an environment of 22°C and 60% RH (relative humidity 60%) and the water absorption was tested for 0-7 days (where 0h is the initial water content of the aerosol-generated product under this environment, 12h is the water content of the aerosol-generated product at the 12th hour under this environment, Day 1 is the water content of the aerosol-generated product at the 24th hour under this environment, Day 2 is the water content of the aerosol-generated product at the 48th hour under this environment, and so on for Day 3-Day 7). A portion of the aerosol-generated products were placed at 0°C and 60% RH and the water absorption was tested for 0-7 days. The water absorption of the aerosol-generated products corresponding to the atomizing agent solutions in Examples 1-6 at 22°C and 60% RH was recorded in Table 1. The changes in water absorption of the aerosol-generated products corresponding to the atomizing agent solutions in each example at 0°C and 60% RH were recorded in Table 2. Wherein, water absorption = (mass of the aerosol-generated product after water absorption - mass of the aerosol-generated product before water absorption) / mass of the aerosol-generated product before water absorption.

[0061] Pure glycerin was directly mixed with heated non-combustible cigarette powder and adhesive, and then rolled to obtain an aerosol-generated product (thin cigarette sheet). A portion of the aerosol-generated product was then placed at 22°C and 60% RH for 0-7 days, and another portion was placed at 0°C and 60% RH for 0-7 days. The measured water absorption of the aerosol-generated product corresponding to this glycerin (Comparative Example 1) at 22°C and 60% RH is recorded in Table 1, and the change in water absorption of the aerosol-generated product corresponding to this glycerin (Comparative Example 1) at 0°C and 60% RH is recorded in Table 2.

[0062] Table 1

[0063] 0h 12h Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Example 1 2.96％ 8.72％ 9.64％ 12.84％ 14.66％ 16.37％ 19.97％ 27.8％ 28.2％ Example 2 2.94％ 8.91％ 9.17％ 13.19％ 14.83％ 16.84％ 18.62％ 28.06％ 28.64％ Example 3 2.77％ 7.66％ 8.83％ 12.98％ 15.39％ 15.9％ 17.71％ 26.14％ 29.08％ Example 4 2.64％ 6.83％ 7.6％ 11.58％ 13.6％ 15％ 15.59％ 25.27％ 27.17％ Example 5 2.33％ 10.26％ 11.47％ 15.29％ 18.76％ 20.88％ 21.54％ 28.33％ 29.55％ Example 6 2.82％ 9.88％ 12.26％ 15.17％ 19.42％ 21.64％ 22.3％ 28.19％ 29.13％ Comparative Example 1 1.76％ 12.33％ 14.39％ 16.23％ 20.4％ 21.91％ 22.61％ 28.67％ 29.78％

[0064] Table 2

[0065] 0h 12h Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Example 1 2.86％ 4.53％ 5.96％ 8.12％ 16.37％ 17.2％ 20.33％ 21.26％ 22.34％ Example 2 2.72％ 4.82％ 5.48％ 7.91％ 15.33％ 16.08％ 19.65％ 20.04％ 25.27％ Example 3 2.69％ 5.1％ 5.32％ 8.39％ 14.92％ 15.94％ 20.41％ 21.47％ 23.76％ Example 4 2.64％ 4.21％ 4.61％ 7.48％ 14.68％ 15.63％ 18.92％ 19.74％ 20.07％ Example 5 2.09％ 5.2％ 6.72％ 14.07％ 15.93％ 18.4％ 22.09％ 24.84％ 25.47％ Example 6 2.72％ 4.97％ 5.66％ 13.29％ 16.08％ 17.48％ 23.75％ 24.64％ 25.98％ Comparative Example 1 1.76％ 3.54％ 4.48％ 13.78％ 16.88％ 18.79％ 24.41％ 25.46％ 26.16％

[0066] As shown in Tables 1 and 2, whether the aerosol-generating product is placed at 22°C and 60% RH or at 0°C and 60% RH, the atomizing agent solutions provided in Examples 1-6 of this invention improve the moisture resistance of the aerosol-generating product compared to pure glycerin atomizing agents. This is because the atomizing agent in the atomizing agent solution provided by this invention forms stable hydrogen bonds with the metal salt, effectively reducing the possibility of hydroxyl groups in the atomizing agent combining with water molecules in the air to form hydrogen bonds, thereby reducing the hygroscopicity of the atomizing agent and significantly improving the moisture resistance of the aerosol-generating product.

[0067] Furthermore, the atomizing agent solutions in Examples 1-4, prepared using calcium chloride and glycerol, exhibit superior moisture-proof performance compared to those in Examples 5 and 6. This is because the combined effect of the ion-dipole interaction between the metal portion of the metal salt and the atomizing agent, and the hydrogen bonds formed between the non-metal portion and the hydroxyl hydrogen in the atomizing agent, results in the superior moisture-proof performance of Examples 1-4 compared to Examples 5 and 6.

[0068] Furthermore, in Example 4, the molar ratio of calcium chloride to glycerol is controlled within the range of 0.08:1-0.10:1, and even further within the range of 0.09:1-0.10:1, while the heating temperature is controlled within 80℃-85℃. As a result, when the atomizing agent solution is applied to the aerosol-generated product, the moisture-proof performance of the aerosol-generated product is optimal.

[0069] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. An atomizing agent solution having an improved moisture resistance of an aerosol generating article for the aerosol generating article, characterized by, The atomizing agent solution includes a metal salt and an atomizing agent. The metal salt dissolves in the atomizing agent through ion-dipole interactions and combines with the atomizing agent through hydrogen bonds. The atomizing agent is selected from one or more of glycerol, propylene glycol, or butanediol, and the metal salt is selected from one or more of calcium chloride, magnesium chloride, aluminum chloride, sodium chloride, potassium chloride, or zinc chloride.

2. The atomized agent solution of claim 1, wherein, The molar ratio of the metal salt to the atomizing agent is 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:

1.

3. The atomizing agent solution according to claim 1, characterized in that, The viscosity of the atomizing agent solution is 8000-12000 mPa·S, 12000-16000 mPa·S, or 16000-20000 mPa·S.

4. A method for preparing the atomizing agent solution according to any one of claims 1-3, characterized in that, include: The atomizing agent and the metal salt are stirred under heating to obtain the atomizing agent solution, wherein the heating temperature is 80℃-120℃.

5. The method for preparing the atomizing agent solution according to claim 4, characterized in that, The stirring time is 5-15 hours.

6. The method for preparing the atomizing agent solution according to claim 5, characterized in that, The heating and stirring are carried out under inert gas conditions.

7. The method for preparing the atomizing agent solution according to claim 5, characterized in that, The heating temperature is 80℃-100℃, and the stirring time is 6h-8h.

8. The method for preparing the atomizing agent solution according to claim 4, characterized in that, The molar ratio of the metal salt to the atomizing agent is 0.01:1 to 0.04:1, 0.04:1 to 0.08:1, or 0.08:1 to 0.12:

1.

9. The application of the atomizing agent solution according to any one of claims 1-3 in improving the moisture resistance of aerosol-generated products.

10. An aerosol-generating product with high moisture resistance, characterized in that, The aerosol generating article includes a smoke-generating section, which includes an aerosol generating matrix and an atomizing agent solution according to any one of claims 1-3.

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