An atomized liquid, an atomizer and an aerosol generating device

Abstract

The present application belongs to the technical field of atomized liquid component design, and particularly relates to an atomized liquid, an atomizer and an aerosol generating device. The atomized liquid comprises, by weight percentage, nicotine 0.1-5%, benzoic acid 0.1-3%, lactic acid 0.1-3%, smoke agent 30-50%, essence 0.8-10%, additive 1-8%, and the rest is solvent. The addition of an appropriate amount of lactic acid in the benzoic acid nicotine salt atomized liquid has a significant effect on the improvement of carbon deposition, and the TPM is relatively stable and has a good taste. The addition of vanillin and its derivatives has a very obvious beneficial effect on the improvement of carbon deposition after the addition of lactic acid.

Description

Technical Field

[0001] This invention belongs to the field of atomizing liquid component design technology, and specifically relates to an atomizing liquid, an atomizer, and an aerosol generating device. Background Technology

[0002] With the trend of expanding distribution channels and the anticipated regulatory restrictions on nicotine content, improving nicotine delivery efficiency and achieving high addictiveness with low-concentration nicotine nebulizers are key research areas in the aerosol generator industry. Nicotine salts have stronger penetrating power than free nicotine, increasing the level of nicotine that can penetrate into the bloodstream within the same time frame. Therefore, they offer a solution that closely approximates blood absorption of nicotine without excessive throat irritation.

[0003] In existing technologies, benzoic acid and nicotine are often combined to form nicotine salts to replace traditional free nicotine, providing a better user experience. However, the problem of carbon buildup in nicotine salt atomizing liquids formulated with benzoic acid has not been resolved. Furthermore, the addition of high-viscosity, high-boiling-point substances, such as natural extracts, introduces sugars during the process, which is also a significant cause of carbon buildup. Particularly for ceramic aerosol generators, as the number of inlets increases, varying degrees of carbon buildup occur on the ceramic heating elements (wires, surfaces, plates). This carbon buildup not only affects the temperature of the atomizing surface but also imparts a burnt taste to the aerosol, resulting in inconsistent flavor profiles throughout the atomizing liquid consumption process. This leads to a poor consumer experience and negatively impacts the product's reputation. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an atomizing liquid, which, by weight percentage, comprises...

[0005]

[0006] As a preferred option, the molar ratio of nicotine, benzoic acid, and lactic acid is 1:0.6:0.4 to 0.6.

[0007] As a preferred aerosol agent, glycerol is preferred.

[0008] Preferred ingredients include: α-pinene, β-pinene, 3-octanol, α-terpinene, limonene, 1,8-cineole, γ-terpinene, triacetin, leaf ester acetate, isoamyl acetate, γ-undecyl lactone, propyldecyl lactone, ethyl maltol, diethyl carbonate, benzyl alcohol, ethyl butyrate, isoamyl acetate, ethyl hexanoate, leaf alcohol, myrcene, 6-methyl-5-hepten-2-one, ocimene. 1,2-Propylene glycol, 2-acetic acid ester, vanillin, ethyl vanillin, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, isoamyl butyrate, isoamyl isovalerate, linalyl acetate, propyldecyl lactone, methyl dihydrojasmone, triethyl citrate, 3-carene, camphene, ethyl transoleate, ethyl 2-methylbutyrate, hexyl acetate, allyl hexanoate, butyl butyryl lactate

[0009] Furthermore: the fragrance is any one or a combination of vanillin, ethyl vanillin, vanillin propylene glycol acetal, and ethyl vanillin propylene glycol acetal.

[0010] Further: any one or more combinations of vanillin, ethyl vanillin, vanillin propylene glycol acetal, and ethyl vanillin propylene glycol acetal account for 1% to 65% of the total weight of the fragrance.

[0011] As a preferred option, the additive is any one or a combination of menthol, menthone, isomenthone, isomenthol, menthyl acetate, menthyl lactate, WS-23 (N-ethyl-L-menthylformamide), WS-3 (menthamide), and WS-5 (N-(ethoxycarbonylmethyl)-p-alkyl-3-formamide).

[0012] Preferably, the solvent includes a first solvent and a second solvent, and the weight ratio of the first solvent to the second solvent is 10 to 60:1. The first solvent is one or a combination of ethanol and propylene glycol, and the second solvent is a polyol, such as polyethylene glycol or polypropylene glycol.

[0013] The present invention also provides an atomizer containing the above-mentioned atomizing liquid.

[0014] The present invention also provides an aerosol generating device including the above-described atomizer.

[0015] The beneficial effects of this invention are as follows: adding an appropriate amount of lactic acid to the benzoic acid nicotine salt atomizing liquid has a significant effect on improving carbon buildup, and the total particulate matter (TPM) is relatively stable and has a good taste. This avoids the problem of carbon buildup in nicotine salt atomizing liquids prepared solely with benzoic acid, and also avoids the negative impact on the overall taste caused by using only lactic acid. Furthermore, the addition of vanillin and its derivatives has a significant beneficial effect on improving carbon buildup after the introduction of lactic acid. In this solution, a mixed solvent of alcohol and polyol is used in nicotine atomizing liquids containing both benzoic acid and lactic acid to exert a synergistic effect, resulting in a more stable and efficient performance of the atomizing liquid in atomization applications. Additives can compensate for deficiencies in flavorings and provide special taste sensations such as a cooling effect. Detailed Implementation

[0016] Unless otherwise defined, all 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 pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] The atomizing fluid in this solution, calculated by weight percentage, includes

[0018]

[0019] The aerosol agent is glycerol.

[0020] The fragrance is a combination of ethyl butyrate, 2-methylbutyrate, leaf alcohol, isoamyl acetate, ethyl hexanoate, hexyl acetate, isoamyl butyrate, allyl hexanoate, isoamyl isovalerate, butyl butyryl lactate, vanillin, propyldecyl lactone, triethyl citrate, and vanillin propylene glycol acetal.

[0021] The additive is N-ethyl-L-menthylformamide.

[0022] The solvent is a uniform mixture of propylene glycol and PEG400.

[0023] When preparing the atomizing liquid, first add nicotine and organic acids to the solvent, heat it to 56°C and ultrasonically disperse it thoroughly, then add the atomizing agent, fragrance, and additives and disperse them thoroughly.

[0024] Specific examples are as follows:

[0025] First, based on the different specific components of the fragrance, four homogeneous fragrances (M-1, M-2, M-3, and M-4) were formulated. The specific weight proportions of the components in these four fragrances are as follows:

[0026]

[0027]

[0028] Based on the four different flavorings mentioned above, atomizing liquids for different embodiments were prepared. These atomizing liquids were then bottled into aerosol generators (with the ceramic atomizing core in a clean state). Simulated atomization experiments were conducted on a smoking machine, and the total particulate matter (TPM) was measured to evaluate the anti-carbon buildup performance of the atomizing liquids, as shown in Table 1. Each aerosol generator contained 5 mL of atomizing liquid. Simulated atomization experiments were conducted on each aerosol generator on a smoking machine using the CORESTA recommended inhalation method: 240 inhalations, 3 seconds of inhalation followed by a 27-second pause, resulting in an inhalation volume of 55 mL (i.e., an inhalation speed of 18.3 mL / s). The smoking machine was fully charged during the test.

[0029] Table 1

[0030]

[0031]

[0032]

[0033] In the table above, "TPM" represents the amount of vapor, "PUFF" represents the number of puffs, and "TPM / PUFF" represents the average amount of vapor inhaled per puff. This application uses "TPM attenuation percentage" to compare the anti-carbon buildup performance of different atomizing liquids. The TPM attenuation percentage is calculated by subtracting the TPM / PUFF value from the TPM / PUFF value of 181 to 240 puffs from the TPM / PUFF value of 0 to 30 puffs, and then dividing by the TPM / PUFF value of 0 to 30 puffs. If the TPM attenuation percentage is 0 or negative, it indicates that there is no attenuation.

[0034] As shown in Table 1, the nebulizer of the example with only benzoic acid and no lactic acid had a higher TPM attenuation percentage. When the molar ratio of benzoic acid to lactic acid was 0.6:0.4 to 0.8 or when benzoic acid was not added, the TPM was relatively stable throughout the suction stage, and the overall attenuation was no more than 10%.

[0035] Appropriately increasing the content of vanillin and its derivatives has a significant promoting effect on the aroma of e-liquid, but it also aggravates carbon buildup. To address this, this application utilizes the addition of a certain amount of lactic acid to effectively reduce carbon buildup and decrease TPM attenuation. Furthermore, this application has further discovered that:

[0036] In the atomizing liquid of flavor M-4 without vanillin and its derivatives, the effect of lactic acid on improving carbon deposits is relatively limited: Compared with Example 11, the introduction of lactic acid in Example 12 delayed the TPM attenuation percentage by 18.7% - 4.3% = 14.4%.

[0037] When the fragrance in the atomizing fluid contains vanillin and its derivatives (fragrances M-1, M-2, M-3), the introduction of the same amount of lactic acid significantly improved the effect of delaying the percentage decay of TPM.

[0038] Compared to Example 1, Example 3 used M-1 fragrance in both cases. The introduction of lactic acid resulted in a 58% - 6.4% = 51.6% delay in the TPM attenuation percentage.

[0039] Compared to Example 7, Example 8 used M-2 fragrance. After introducing lactic acid, the effect of delaying the TPM attenuation percentage was 51.1% - (-4.7%) = 55.8%.

[0040] Compared to Example 9, Example 10 used M-3 fragrance. After introducing lactic acid, the effect of delaying the TPM attenuation percentage was 44.4% - (-4.4%) = 48.8%.

[0041] It is evident that whether the atomizing fluid contains vanillin and its derivatives has a significant impact on improving carbon buildup after the introduction of lactic acid.

[0042] To further investigate this point, this application further uses "vanillin" and "jasmine (C)" respectively. 22 H 25 NO2), nerolitin (C) 18 H 27 NO3) replaces "vanillin and its derivatives (combination)" in flavoring M-2 as a new flavoring, with the remaining components the same as M-2:

[0043] M-5

[0044]

[0045] M-6

[0046]

[0047]

[0048] M-7

[0049]

[0050] Based on the aforementioned fragrances M-5, M-6, and M-7, atomizing solutions for Examples 14 to 19 were prepared respectively. The other components of the atomizing solutions for Examples 14 to 19 were the same as in Examples 1 to 13, and TPM measurements were performed using the same method as above, as shown in Table 2.

[0051] Table 2

[0052]

[0053]

[0054] In Table 2, both Example 15 and Example 14 used M-5 fragrance. After introducing lactic acid, the effect of delaying the TPM attenuation percentage was 50.9% - 28.1% = 22.8%.

[0055] Compared to Example 16, Example 17 used M-6 fragrance. The introduction of lactic acid resulted in a 25.2% delay in the TPM attenuation percentage (46.9% - 21.7%).

[0056] Compared to Example 18, Example 19 used M-7 fragrance. After introducing lactic acid, the effect of delaying the TPM decay percentage was 45.6% - 23.8% = 21.8%.

[0057] Based on the results above, compared to the M-4 fragrance which does not contain benzene rings, the use of fragrances M-5, M-6, and M-7 in Table 2 exacerbated carbon buildup in the atomizing fluid. The introduction of lactic acid enhanced its ability to improve carbon buildup. However, the impact of fragrances M-5, M-6, and M-7 on the "lactic acid's ability to improve carbon buildup" was significantly less than that shown in Table 1 when the atomizing fluid fragrance contained vanillin and its derivatives. This is likely due to a synergistic effect between vanillin and its derivatives and lactic acid.

[0058] Furthermore, comparing Example 3 and Example 13: compared to the use of a conventional single solvent in the atomizing liquid of Example 13, the addition of polyol to the solvent in Example 3 reduced carbon buildup and improved atomization stability.

[0059] A statistical scoring method was used to conduct a taste test on the atomized liquids of the above embodiments. Seven judges were selected to score the satisfaction and aroma concentration of the atomized liquids of the above embodiments, with scores ranging from 1 to 5. The higher the score, the better the indicator. The scoring reference standard was 1 (not obvious), 3 (average), and 5 (obvious). The scoring method was as follows: the judges scored the satisfaction and aroma concentration, with the main judge accounting for 16% and the other six judges accounting for 14%. The scores were added together according to the weights to obtain the score for each item. The passing standard for satisfaction was set at 2.5 points, and the passing standard for aroma concentration was set at 3 points, as shown in Table 3.

[0060] Table 3

[0061]

[0062] If the lactic acid content in the atomizing liquid is relatively high, although the TPM attenuation percentage will be controlled to a very small extent, it will result in an overall low pH of the nicotine salt solution, which will suppress the aroma effect during atomization and make the overall inhalation taste acidic.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An atomizing fluid, characterized in that: The atomizing fluid, calculated by weight percentage, includes Nicotine 0.1%–5% Benzoic acid 0.1%–3% Lactic acid 0.1%~3% Smoke agent 30%–50% Fragrance 0.8%–10% Additives 1%–8% Solvent balance, The molar ratio of nicotine, benzoic acid, and lactic acid is 1:0.6:0.4 to 0.

6. The fragrance is any one or a combination of vanillin, ethyl vanillin, vanillin propylene glycol acetal, and ethyl vanillin propylene glycol acetal.

2. The atomizing liquid as described in claim 1, characterized in that: The aerosol agent is glycerol.

3. The atomizing liquid as described in claim 1, characterized in that: The fragrance comprises α-pinene, β-pinene, 3-octanol, α-terpinene, limonene, 1,8-cineole, γ-terpinene, triacetin, leaf ester acetate, isoamyl acetate, γ-undecyl lactone, propyldecyl lactone, ethyl maltol, diethyl carbonate, benzyl alcohol, ethyl butyrate, isoamyl acetate, ethyl hexanoate, leaf alcohol, myrcene, 6-methyl-5-hepten-2-one, ocimene, 1 2-Propylene glycol, 2-acetic acid ester, vanillin, ethyl vanillin, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, isoamyl butyrate, isoamyl isovalerate, linalyl acetate, propyldecyl lactone, methyl dihydrojasmone, triethyl citrate, 3-carene, camphene, ethyl transoleate, ethyl 2-methylbutyrate, hexyl acetate, allyl hexanoate, butyl butyryl lactate, any one or more combinations thereof.

4. The atomizing liquid as described in claim 3, characterized in that: Vanillin, ethyl vanillin, vanillin propylene glycol acetal, and ethyl vanillin propylene glycol acetal, together with any one or more of these compounds, constitute 1% to 65% of the total weight of the fragrance.

5. The atomizing liquid as described in claim 1, characterized in that: The additive is any one or a combination of menthol, menthone, isomenthone, isomenthol, menthyl acetate, menthyl lactate, N-ethyl-L-menthylformamide, menthol, and N-(ethoxycarbonylmethyl)-p-alkyl-3-carboxamide.

6. The atomizing liquid as described in claim 1, characterized in that: The solvent includes a first solvent and a second solvent, wherein the weight ratio of the first solvent to the second solvent is 10 to 60:1, the first solvent is one or a combination of ethanol and propylene glycol, and the second solvent is a polyol.

7. An atomizer, characterized in that: The atomizer contains the atomizing liquid as described in any one of claims 1 to 6.

8. An aerosol generating device, characterized in that: The aerosol generating device includes the atomizer as described in claim 7.

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