Sealant, method for producing sealant, and electronic atomizer

Abstract

The application discloses a sealing agent, a preparation method of the sealing agent and an electronic atomizer, the sealing agent is a liquid, the sealing agent is suitable for sealing atomized liquid of the electronic atomizer, and the sealing agent comprises food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E and food-grade high-hydrophobic polydimethylsiloxane in parts by weight of 70-85, 13-18, 0.5-1.5 and 0.2-0.8 respectively. The sealing agent has the following beneficial effects: the food-grade safety performance is excellent, and there is no health risk; the sealing agent is stable in stratification with the atomized liquid, is not miscible and emulsified, and has excellent compatibility; the following-up sealing performance is excellent, and the sealing agent is accurately suitable for the use requirement of the electronic atomizer; the stability is high, the shelf life is long, and the sealing agent is suitable for different use environments; the cost is controllable, the preparation process is simple, and the sealing agent can be mass-produced in industrialization; there is no peculiar smell and pollution, and the sealing agent does not affect the use experience of the electronic atomizer.

Description

Technical Field

[0001] This application relates to the field of atomization technology, and in particular to a sealant, a method for preparing the sealant, and an electronic atomizer. Background Technology

[0002] As a new type of atomization device, electronic atomizers require their internal liquid reservoir to be sealed to prevent the liquid from evaporating, oxidizing, or deteriorating, while also avoiding leakage. The adaptive sealant, as the core component for sealing the liquid, directly determines the sealing effect, safety, and user experience of the electronic atomizer.

[0003] Currently, adaptive sealants used in atomizing fluids still have many technical defects that make it difficult to meet actual usage needs. Specifically: they are mostly formulated with industrial-grade raw materials, which may lead to component migration and harm to human health; the components are not properly matched, making them easy to miscible and emulsify with the atomizing fluid, resulting in stratification failure; the viscosity and thixotropy are not properly adjusted, resulting in problems such as flow leakage or failure to flow smoothly with the consumption of the atomizing fluid, leading to unstable sealing performance; they are prone to deterioration and decline in physical and chemical properties during long-term storage or under high and low temperature environments.

[0004] A few food-grade sealants exist in the existing technology, but these sealants are mainly used in pen refills, food packaging and other fields. Their formulation design does not take into account the strong polarity of atomizing liquids and the need for adaptive sealing. When applied to sealing atomizing liquids, problems such as component migration, unstable stratification and poor sealing effect will still occur, and they cannot meet the sealing requirements of atomizing liquids. Summary of the Invention

[0005] The main objective of this application is to provide a sealant, a method for preparing the sealant, and an electronic atomizer, thereby solving the technical problem that existing sealants cannot meet the sealing requirements of atomized liquids.

[0006] To achieve the above objectives, the first aspect of this application provides a sealant, which is a liquid and is adapted to seal the atomizing liquid of an electronic atomizer. The sealant comprises: Food-grade No. 10 white oil, with a part quantity greater than or equal to 70 and less than or equal to 85; Food-grade hydrophobic fumed silica, with a content greater than or equal to 13 and less than or equal to 18; Food-grade vitamin E, with a serving size greater than or equal to 0.5 and less than or equal to 1.5; and Food-grade highly hydrophobic polydimethylsiloxane, in a proportion greater than or equal to 0.2 and less than or equal to 0.8.

[0007] Optionally, the density of the sealant is greater than or equal to 0.85 g / cm³ and less than or equal to 0.88 g / cm³.

[0008] Optionally, the viscosity of the sealant is greater than or equal to 10,000 mPa·s and less than or equal to 13,000 mPa·s.

[0009] Optionally, the sealant has a thixotropic index greater than or equal to 3.2 and less than or equal to 3.6.

[0010] Optionally, the thickness of the sealant layer above the atomized liquid is greater than or equal to 1 mm.

[0011] Optionally, the time for complete stratification after the sealant and the atomizing liquid are mixed is no more than 30 minutes.

[0012] A second aspect of this application provides a method for preparing the sealant according to any one of the above claims, the method comprising the steps of: Prepare materials by weighing food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E, and food-grade highly hydrophobic polydimethylsiloxane. Disperse and mix: Add the weighed food-grade No. 10 white oil to the reactor, turn on the constant temperature device and adjust the temperature inside the reactor to 45℃±2℃, turn on the stirring device and adjust the stirring speed to 300r / min±20r / min, and stir for 5min±1min. To construct the thixotropic system, keep the temperature inside the reactor constant at 45℃±2℃, increase the stirring speed to 500r / min±20r / min, slowly add the weighed food-grade hydrophobic fumed silica into the reactor at a rate of 1~2g / min, and continue high-speed dispersion for 40min±2min after the addition is complete. Adding the additives, the temperature inside the reactor was reduced to 35℃±2℃, the stirring speed was adjusted back to 300r / min±20r / min, and the weighed food-grade vitamin E and food-grade highly hydrophobic polydimethylsiloxane were added in sequence. After adding, stirring was continued for 20min±1min. Degassing and filtration: Turn on the vacuum degassing device of the reactor and control the vacuum degree to -0.08~-0.09MPa for 15min±1min; after degassing, filter the system through a 1μm food-grade filter membrane. Filling: Cool the filtered sealant to 25℃±5℃, fill it into a clean, sealed container, seal and store to obtain the sealant.

[0013] A third aspect of this application discloses an electronic atomizer, the electronic atomizer comprising: The liquid storage tank contains the atomizing fluid; and The sealant described in any one of the above embodiments is used to isolate the atomized liquid from air, and the sealant is capable of achieving a follow-up seal through thixotropy.

[0014] Optionally, the liquid storage chamber includes a liquid storage cavity and a pressure regulating cavity that are interconnected. The bottom end of the pressure regulating cavity is provided with a liquid passage hole that communicates with the liquid storage cavity, and the top end of the pressure regulating cavity is provided with a vent hole that communicates with the outside. The vent hole is covered with an oil-proof and breathable membrane. The atomizing liquid is stored in the liquid storage cavity, and the sealant is stored in the pressure regulating cavity. The atomizing liquid can flow into the pressure regulating cavity through the liquid passage hole. The oil-proof and breathable membrane is used to prevent the sealant and the atomizing liquid from overflowing from the vent hole. The structure of the pressure regulating cavity is adapted to the storage of the sealant and the requirements for follow-up sealing.

[0015] Optionally, the height of the sealant is greater than or equal to 1 mm and less than or equal to 3 mm.

[0016] In this sealant application, food-grade 10# white oil is a colorless, odorless, and non-toxic non-polar base carrier, providing the necessary flowability and inert protective properties to ensure that the sealant does not react with the atomizing liquid. Food-grade hydrophobic fumed silica has strong hydrophobic properties and can act as a thixotropic agent, constructing a stable three-dimensional network structure in the sealant system. This adjusts the sealant's viscosity and thixotropy, ensuring that the sealant remains viscous when stationary, without leakage or flow, and that its viscosity decreases under slight shear force as the atomizing liquid is consumed, allowing it to flow smoothly. Smooth and flexible; Food-grade vitamin E is a non-polar antioxidant that can prevent food-grade 10# white oil from oxidizing and becoming rancid, extending the shelf life of the sealant. It is also insoluble in the atomizing liquid, eliminating the risk of component migration. Food-grade highly hydrophobic polydimethylsiloxane is a colorless, odorless, and non-toxic non-polar liquid that can defoam in small amounts, eliminating tiny bubbles generated during the sealant preparation process. At the same time, it further enhances the hydrophobicity of the sealant system, strengthens the stratification effect between the sealant and the atomizing liquid, and ensures that the two quickly separate upon contact, do not emulsify for a long time, and are immiscible.

[0017] The sealant of this application has the following significant beneficial effects: (1) Excellent food-grade safety performance with no health risks: This application is formulated with all food-grade raw materials. All components strictly comply with the relevant food contact standards of GB 4806 series, GB 2760 and FDA 21 CFR. No components migrate to the atomizing liquid phase, ensuring the safety of the electronic atomizer during use and adapting to usage scenarios where the atomizing liquid may indirectly come into contact with the oral cavity.

[0018] (2) Stable separation with atomizing liquid, immiscible and non-emulsified, with excellent compatibility: This application adopts a completely non-polar hydrophobic system, which is precisely matched with the strong polarity of the atomizing liquid. After contact with mainstream atomizing liquids with different PG / VG ratios (50 / 50, 60 / 40, 70 / 30), it can quickly separate into layers (complete separation within 30 min). After standing at room temperature for 30 days, at 60℃ for 7 days, and at -20℃ for 7 days, there is no immiscibility, no emulsification, and no turbidity, and the separation interface is clear. After dynamic shaking (100 times / min, 24h), clear separation can be restored within 30 min, and there is no emulsification.

[0019] (3) Excellent dynamic sealing performance, precisely adapted to the needs of electronic atomizers: This application constructs a stable three-dimensional network structure using food-grade hydrophobic fumed silica, with the thixotropic index precisely controlled at 3.2–3.6, achieving the unique characteristics of "shear thinning and static thickening" - when stationary, it is viscous, does not leak or flow, and can stably cover the surface of the atomizing liquid; when the atomizing liquid is consumed, it is subjected to slight pressure shearing, the viscosity decreases, and it can move synchronously with the atomizing liquid. After moving, it quickly returns to the viscous state and re-forms a seal; at the same time, the density of the sealant is lower than that of the atomizing liquid, so it can float stably, effectively isolate the air, prevent the atomizing liquid from evaporating and oxidizing, and the sealing effect is long-lasting.

[0020] (4) Strong stability, long shelf life, and suitable for different usage environments: This application adds food-grade vitamin E as an antioxidant, which can effectively prevent the base oil (food-grade 10# white oil) from oxidizing and becoming rancid. Combined with highly stable raw material components, the sealant does not solidify or flow when stored at room temperature away from light. It has stable layering performance and is suitable for different storage and usage environments of electronic atomizers.

[0021] (5) Cost controllable, simple preparation process, and industrial mass production: The food-grade raw materials used in this application are all conventional food contact grade raw materials, which are widely available, easy to obtain and moderately priced, and do not require expensive raw materials; the preparation process does not require complex equipment such as high temperature and high pressure or special catalysts, and can be completed by conventional stirring, degassing and filtration. The process has good repeatability and high production efficiency, and is suitable for industrial mass production. It can be widely used in various electronic atomizer products to reduce the cost of electronic atomizer manufacturers.

[0022] (6) Odorless and pollution-free, and does not affect the user experience of electronic atomizer: All raw materials have no obvious odor, no toxic or harmful substances are generated during the preparation process, and the sealant does not adsorb the fragrance components in the atomizing liquid after contact with the atomizing liquid, does not affect the original flavor of the atomizing liquid, does not contaminate the atomizing liquid, and ensures the taste and user experience of electronic atomizer. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram illustrating the usage state of the sealant in this application; Figure 2 This is a flowchart of the preparation method of the sealant in this application; Figure 3 This is a cross-sectional view of the electronic atomizer of this application.

[0025] Explanation of icon numbers: label name label name 100 sealant 200 atomizing liquid 300 Electronic atomizer 310 reservoir 320 Pressure regulating chamber 321 Vent 322 Liquid passage 330 Oil-resistant and breathable membrane The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] This application discloses a sealant. Please refer to [link / reference needed]. Figure 1 The sealant 100 is a liquid and is compatible with the atomizing fluid 200 of an electronic atomizer. The sealant 100 floats above the surface of the atomizing fluid 200, preventing it from contacting air. This sealant is also suitable for sealing and protecting various volatile and easily oxidized liquid media with properties similar to the electronic atomizer's atomizing fluid. Specifically, this includes: sealing the liquid matrix of electronic atomizer-related derivative products (such as atomized aromatherapy and disinfectant sprays); sealing and preserving various liquid flavorings, edible essential oils, and liquid seasonings in the food industry; sealing and storing volatile liquid drugs and medicinal essential oils in the pharmaceutical industry; sealing and protecting liquid fragrances and essential oil skincare products in the beauty industry; and isolating and sealing small amounts of volatile liquid reagents and internal liquid media in precision instruments in the industrial field. In the above-mentioned applicable scenarios, the sealant can rely on its food-grade safety characteristics, good hydrophobicity and thixotropy to float above the surface of the corresponding liquid medium, achieving efficient air isolation and sealing, without reacting with the corresponding liquid medium and without affecting the performance of the medium itself.

[0030] The sealant includes food-grade 10# white oil (food-grade liquid paraffin), with a proportion of 70% to 85%. Food-grade 10# white oil is a colorless, odorless, non-toxic, non-polar base carrier that provides the necessary flowability and inert protective properties to ensure the sealant does not react with the atomizing liquid. Further, the proportions of food-grade 10# white oil can be 70-80, 75-80, 70-75, 72-78, 78-85, 80-85, or 75-82. Even further, the proportions can be 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, or 85.

[0031] The sealant includes food-grade hydrophobic fumed silica, with the proportion of food-grade hydrophobic fumed silica being greater than or equal to 13 and less than or equal to 18. Food-grade hydrophobic fumed silica possesses strong hydrophobic properties and can act as a thixotropic agent, constructing a stable three-dimensional network structure in the sealant system. This regulates the viscosity and thixotropy of the sealant, ensuring that the sealant remains viscous when stationary, preventing leakage and dripping. As the atomized liquid is consumed, its viscosity decreases under slight shear force, allowing for smooth flow. Further, the proportion of food-grade hydrophobic fumed silica is 13-17, 14-18, 15-17, 13-14, 14-16, 15-18, or 13-15, etc. Even further, the proportion of food-grade hydrophobic fumed silica is 13, 14, 15, 16, 17, or 18, etc.

[0032] The sealant includes food-grade vitamin E (dl-α-tocopherol), with a content of 0.5% to 1.5%. Food-grade vitamin E is a non-polar antioxidant, preventing oxidative rancidity of food-grade 10# white oil, extending the sealant's shelf life, and is insoluble in the atomizing liquid, posing no risk of component migration. Further, the content of food-grade vitamin E is 0.5–1.4%, 0.5–1.0%, 1.0–1.5%, or 0.8–1.2%. Even further, the content of food-grade vitamin E is 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, or 1.5%.

[0033] The sealant includes food-grade highly hydrophobic polydimethylsiloxane, with a content of ≥0.2 and ≤0.8%. This food-grade highly hydrophobic polydimethylsiloxane is a colorless, odorless, non-toxic, non-polar liquid that can defoam slightly, eliminating tiny bubbles generated during sealant preparation. It also further enhances the hydrophobicity of the sealant system, strengthens the stratification effect between the sealant and the atomized liquid, and ensures rapid stratification upon contact, long-term non-emulsification, and immiscibility. Further, the content of food-grade highly hydrophobic polydimethylsiloxane is 0.2~0.7, 0.2~0.4, 0.4~0.6, 0.6~0.8, or 0.3~0.5, etc. Even further, the content of food-grade highly hydrophobic polydimethylsiloxane is 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, or 0.8, etc.

[0034] In the sealant of this application, the sealant may consist only of food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E and food-grade highly hydrophobic polydimethylsiloxane. The sealant may also contain other conventional additives or components in addition to the above components, all of which are within the protection scope of this application.

[0035] The sealant used in this application comprises food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E, and food-grade highly hydrophobic polydimethylsiloxane. All components strictly comply with the Chinese GB 4806 series safety standards for food contact materials and products and the US FDA 21 CFR safety standards for food contact materials. The purity, impurity content, and safety indicators of each component have passed the corresponding standard testing and certification, classifying them as food-grade raw materials safe for contact with food, pharmaceuticals, and human products. Furthermore, through the scientific proportioning of each component and precise process control, this sealant forms a stable homogeneous system. In various applicable scenarios, including those using electronic atomizer liquids, food-grade liquid media, and pharmaceutical liquid agents, no component migration occurs. This means the sealant components will not seep into the sealed liquid medium, nor will they react chemically with the medium to produce harmful substances, ensuring the safety and compliance of the sealant during use. It can be widely applied in various sealing scenarios with high safety requirements.

[0036] The density of the sealant is greater than or equal to 0.85 g / cm³ and less than or equal to 0.88 g / cm³. This allows the sealant to float stably and uniformly on the surface of the atomized liquid, forming a continuous and reliable sealing layer. This prevents the sealant from sinking into the atomized liquid due to excessive density or floating unstably due to insufficient density, ensuring a consistently stable seal.

[0037] The sealant has a viscosity greater than or equal to 10,000 mPa·s and less than or equal to 13,000 mPa·s. Therefore, the sealant possesses both suitable flowability and formability, enabling it to automatically and evenly spread on the surface of the atomized liquid, forming a continuous and complete sealing layer. This avoids excessive flow, cross-contamination, or seal failure due to excessively low viscosity, and also avoids difficulty in spreading and localized accumulation due to excessively high viscosity.

[0038] The sealant has a thixotropic index greater than or equal to 3.2 and less than or equal to 3.6. Therefore, during application of shear forces such as injection and assembly, the sealant's viscosity significantly decreases, and its fluidity improves, facilitating smooth injection, uniform spreading, and precise shaping without stringing or tailing, thus enhancing assembly processability and molding consistency. Furthermore, after settling, the sealant quickly recovers its high viscoelastic state, forming a structurally stable colloidal layer that is resistant to flow, collapse, and mixing with atomized liquid under conditions of transportation, shaking, and temperature changes, maintaining the integrity of the sealing layer.

[0039] The sealant layer above the atomizing liquid has a thickness of 1 mm or greater. This creates a sufficiently thick sealing layer, preventing localized cracking, damage, or blind spots due to insufficient thickness, ensuring the integrity and effectiveness of the sealing structure. The sealant also significantly enhances its barrier properties against the atomizing liquid, effectively inhibiting evaporation and leakage, reducing liquid loss, and improving the sealing reliability of the storage structure. This thickness range also strengthens the sealing layer's resistance to disturbances under complex conditions such as shaking, transportation, and temperature changes. The sealing layer is less prone to damage and less likely to be contaminated by the atomizing liquid, maintaining a stable, layered floating state over the long term. Furthermore, the sealant layer above the atomizing liquid has a thickness of 1-3 mm. This range prevents the sealant from encroaching on the storage space and reducing the amount of atomizing liquid required due to excessive thickness, achieving a balance between sealing effect and storage capacity.

[0040] Please see Figure 2 This application discloses a method for preparing a sealant, the method comprising the following steps: S100, material preparation: weighing food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E, and food-grade highly hydrophobic polydimethylsiloxane; S200, dispersion and mixing: adding the weighed food-grade 10# white oil into a reaction vessel, turning on the constant temperature device to adjust the temperature inside the reaction vessel to 45℃±2℃, turning on the stirring device and adjusting the stirring speed to 300r / min±20r / min, stirring for 5min±1min; S300, thixotropic system construction: keeping the temperature inside the reaction vessel constant at 45℃±2℃, increasing the stirring speed to 500r / min±20r / min, slowly adding the weighed food-grade hydrophobic fumed silica into the reaction vessel, and adding the rapidly increasing... The stirring speed is controlled at 1~2 g / min. After the addition is complete, continue high-speed dispersion for 40min±2min; S400, Additive addition: Reduce the temperature inside the reactor to 35℃±2℃, adjust the stirring speed back to 300r / min±20r / min, and add the weighed food-grade vitamin E and food-grade highly hydrophobic polydimethylsiloxane in sequence. After addition, continue stirring for 20min±1min; S500, Degassing and filtration: Turn on the vacuum degassing device of the reactor, control the vacuum degree to -0.08~-0.09MPa, and degas for 15min±1min; after degassing, filter the system through a 1μm food-grade filter membrane; S600, Filling: Cool the filtered sealant to 25℃±5℃, fill it into a clean sealed container, seal and store to obtain the sealant.

[0041] In S100, during material preparation: an electronic balance with an accuracy of 0.01g is used to weigh four raw materials: food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E, and food-grade highly hydrophobic polydimethylsiloxane. The weighing environment is controlled in a cleanroom (cleanliness level not lower than 100,000) with a temperature of 25℃±3℃ and a relative humidity of ≤60% to avoid moisture absorption, contamination, or weighing errors affecting the final product performance. Before weighing, all raw materials must be placed in the cleanroom for at least 2 hours to equilibrate, so that the raw material temperature is consistent with the ambient temperature, reducing temperature fluctuations during subsequent mixing. Among them, the food-grade hydrophobic fumed silica must be sealed and stored until just before weighing to prevent it from absorbing moisture from the air, which would reduce its hydrophobicity and affect the construction of the thixotropic system.

[0042] In S200, during dispersion mixing: a stainless steel reactor (made of 316L stainless steel, meeting food-grade contact requirements, with no dead corners or residues inside) equipped with a constant temperature jacket, mechanical stirring device, and vacuum degassing function is selected. The weighed food-grade No. 10 white oil is slowly added to the reactor, avoiding splashing onto the reactor wall (unstirred white oil will cause uneven mixing later). The constant temperature jacket of the reactor is turned on, and the temperature inside the reactor is slowly adjusted to 45℃±2℃ through heat transfer oil circulation heating. After the temperature stabilizes (… (Temperature fluctuation ≤ ±0.5℃) Turn on the mechanical stirring device and slowly adjust the stirring speed to 300r / min ± 20r / min. Maintain this speed for 5min ± 1min to form a uniform flow system of white oil in the reactor. At the same time, remove any trace bubbles that may remain in the white oil, laying a uniform dispersion foundation for the subsequent addition of hydrophobic fumed silica. During the stirring process, the temperature inside the reactor needs to be monitored in real time. If the temperature deviates from the set range, adjust it in time through the temperature control device to avoid excessive temperature causing changes in the performance of white oil.

[0043] In the S300 thixotropic system construction: the temperature inside the reactor is maintained at 45℃±2℃ (the thermostatic jacket operates continuously to ensure no significant temperature fluctuations). The stirring speed is slowly increased to 500r / min±20r / min, and the increase is completed within 1 minute to avoid sudden increases in speed that could cause vortices and entrainment of large amounts of air inside the reactor. A quantitative feeding device is used to slowly and uniformly add weighed food-grade hydrophobic fumed silica into the reactor at a rate strictly controlled at 1~2g / min. During addition, the raw material is evenly spread on the surface of the liquid formed by stirring to prevent it from agglomerating and sinking to the bottom of the reactor, thus hindering its efficient processing. Dispersion; after addition, maintain a high-speed stirring speed of 500 r / min ± 20 r / min and continue high-speed dispersion for 40 min ± 2 min. During the dispersion process, regularly observe the state of the system in the reactor to ensure that the hydrophobic fumed silica is completely dispersed in the white oil without obvious particulate agglomerates, and finally forms a uniform and viscous thixotropic precursor system. In this step, the core purpose of temperature control is to ensure that the hydrophobicity of the hydrophobic fumed silica is not destroyed, while the control of the speed and feeding rate is to avoid agglomeration and ensure the stability and consistency of the thixotropic system. The formation of the thixotropic system directly determines the subsequent follow-up sealing performance of the sealant.

[0044] In S400, during the addition of additives: Turn off the heating function of the thermostatic jacket and slowly lower the temperature inside the reactor to 35℃±2℃ using the jacket cooling device. Control the cooling rate at 2~3℃ / min to avoid excessively rapid cooling that could cause thermal stress in the reactor system and damage the constructed thixotropic system. After the temperature stabilizes, slowly adjust the stirring speed back to 300r / min±20r / min, maintaining a uniform stirring speed. Following the order of "food-grade vitamin E first, then food-grade highly hydrophobic polydimethylsiloxane," add the two weighed additives to the reactor sequentially. After each additive is added, stir for 5 minutes to allow the additives to initially separate. Disperse the mixture before adding the next additive, avoiding direct contact between the two additives which could lead to agglomeration. After both additives are added, continue stirring at a speed of 300 r / min ± 20 r / min for 20 min ± 1 min to ensure that the additives are evenly dispersed in the thixotropic system and fully integrated with the precursor system. Vitamin E, as an antioxidant, needs to be added at a low temperature of around 35℃ to avoid reducing its antioxidant activity at high temperatures, while also helping to improve the compatibility of the sealant. Highly hydrophobic polydimethylsiloxane needs to be added slowly to ensure that it evenly covers the surface of the system, further improving the hydrophobicity and sealing properties of the sealant.

[0045] In the S500 degassing filtration process: Turn on the vacuum degassing device of the reactor and slowly adjust the vacuum level to -0.08~-0.09 MPa. Control the vacuum increase rate at 0.01 MPa / min to avoid sudden increases in vacuum that could cause the system inside the reactor to boil violently or splash. Maintain this vacuum level for continuous degassing for 15 min ± 1 min. During degassing, maintain a low stirring speed of 300 r / min ± 20 r / min to promote the rise of tiny bubbles inside the system to the surface and their subsequent bursting and discharge, ensuring that no bubbles remain inside the sealant (bubbles can cause gaps during the sealing process, affecting the sealing effect, and may also lead to contact between the atomized liquid and air). After completion, shut off the vacuum device and slowly restore the pressure inside the reactor to atmospheric pressure (restoration rate: 0.02 MPa / min). Subsequently, pressurize and filter the sealant system inside the reactor through a 1 μm food-grade polytetrafluoroethylene (PTFE) filter membrane at a pressure controlled at 0.1~0.15 MPa and a uniform filtration rate. The filter membrane needs to be replaced 1~2 times during the filtration process (depending on the degree of filter membrane clogging) to remove any trace impurities, incompletely dispersed fine particles, and external contaminants that may remain in the system, ensuring the purity and uniformity of the sealant and meeting food-grade standards. The filtered sealant should be collected in a clean food-grade container to avoid secondary contamination.

[0046] In the S600 filling process: The filtered sealant is placed in a clean room and allowed to cool naturally to 25℃±5℃. During cooling, direct sunlight and violent vibration should be avoided to prevent system stratification or thixotropic damage. After cooling to the specified temperature, aseptic filling equipment (the filling head is made of food-grade stainless steel and must be sterilized at high temperature before filling) is used to uniformly fill the sealant into clean, food-grade sealed containers (the containers must be cleaned, sterilized, and dried in advance, free of moisture, impurities, and odors). The filling volume error is controlled within ±1%. After filling, the containers are immediately sealed with food-grade sealing caps. During the sealing process, it is ensured that there is no sealant residue at the container opening to prevent air from entering due to incomplete sealing. The sealed sealant should be stored in a cool, dry, and ventilated place with a temperature of 15~30℃ and a relative humidity of ≤60%, away from fire, heat sources, and corrosive substances. The shelf life is 12 months. During storage, the sealing status should be checked regularly to prevent leakage, moisture absorption, etc., to ensure the stability of the sealant's performance and its ability to achieve a follow-up seal through thixotropy during use.

[0047] The entire preparation process is carried out in a cleanroom. Operators must wear sterile protective clothing, gloves, masks, and caps to avoid contamination of raw materials or products due to human contact. Process parameters (temperature, rotation speed, time, vacuum degree, etc.) for each step must be recorded in real time for quality traceability. The weighing, feeding, mixing, filtering, and filling of raw materials must avoid introducing moisture, impurities, and oil to ensure the food-grade safety and performance of the sealant, guarantee the thixotropic properties of the sealant, and achieve follow-up sealing.

[0048] The sealant preparation method of this application uses all food-grade raw materials, which are safe, odorless, and free of harmful leaching. By precisely controlling process parameters such as temperature, rotation speed, feeding rate, and vacuum degree, the components of the prepared sealant are fully dispersed, the thixotropic system is uniformly constructed, and there are no bubbles or impurities. The performance parameters are stable and controllable, and the batch-to-batch consistency is good. It can stably meet the requirements of density 0.85~0.88g / cm³, viscosity 10000~13000mPa・s, and thixotropic index 3.2~3.6, and provide long-lasting and reliable sealing.

[0049] The sealant in this application has a mild preparation process that does not require high temperature and high pressure conditions or special catalysts. It can be prepared by simply stirring, degassing, and filtering. The process is simple to operate, highly controllable, and requires conventional equipment. It does not require high investment in special equipment, which can effectively reduce production costs and improve production efficiency. It is suitable for large-scale industrial mass production and can meet the market demand for bulk supply of this type of sealant.

[0050] Please see Figure 3 This application discloses an electronic atomizer 300, which includes a liquid reservoir and a sealant 100. The liquid reservoir stores atomizing liquid 200, and the sealant 100 is used to isolate the atomizing liquid 200 from the air. The sealant 100 can achieve a dynamic seal through thixotropy. In the electronic atomizer 300 of this application, the sealant 100 can stably float on the surface of the atomizing liquid 200, forming a continuous sealing and isolation layer, thereby effectively reducing the evaporation, leakage, and oxidation of the atomizing liquid 200 and improving the storage stability of the atomizing liquid 200. At the same time, the sealant 100 can adaptively flow and adhere to the liquid reservoir under external force disturbances such as shaking and changes in posture. After the external force disappears, it quickly returns to a high viscosity state to maintain the integrity of the sealing layer, achieving a dynamically stable dynamic seal. The sealant 100 is also immiscible with the atomizing liquid 200 and does not affect the normal operation of the atomizing core, ensuring the safe use of the electronic atomizer 300, smooth vapor production, and extending the product's service life.

[0051] The liquid storage chamber includes a liquid storage cavity 310 and a pressure regulating cavity 320 that are interconnected. The bottom end of the pressure regulating cavity 320 is provided with a liquid passage hole 322 that connects to the liquid storage cavity 310, and the top end of the pressure regulating cavity 320 is provided with a vent hole 321 that connects to the outside. The vent hole 321 is covered with an oil-proof and breathable membrane 330. The atomizing liquid 200 is stored in the liquid storage cavity 310, and the sealant 100 is stored in the pressure regulating cavity 320. The atomizing liquid 200 can flow into the pressure regulating cavity 320 through the liquid passage hole 322. The oil-proof and breathable membrane 330 is used to prevent the sealant 100 and the atomizing liquid 200 from overflowing from the vent hole 321. The structure of the pressure regulating cavity 320 is adapted to the storage of the sealant 100 and the requirements for follow-up sealing. Through the interconnected liquid storage chamber 310 and pressure regulating chamber 320, and in conjunction with the liquid passage 322, vent 321, and oil-proof and breathable membrane 330, on the one hand, the atomizing liquid 200 can enter the pressure regulating chamber 320 through the liquid passage 322, so that the sealant 100 forms a stable sealing isolation layer in the pressure regulating chamber 320. The pressure regulating chamber 320 not only provides a suitable storage and deformation space for the sealant 100, but also fully utilizes its follow-up sealing characteristics, maintaining a stable seal even under conditions such as posture changes and shaking. On the other hand, the vent 321, in conjunction with the oil-proof and breathable membrane 330, can achieve pressure balance between the liquid storage chamber 310 and the outside world, ensuring smooth mist output, while effectively preventing the sealant 100 and atomizing liquid 200 from overflowing from the vent 321. Structurally, this avoids leakage, oil seepage, and contamination problems, significantly improving the sealing reliability and safety of the electronic atomizer 300.

[0052] The height of the sealant 100 is greater than or equal to 1 mm and less than or equal to 3 mm. Therefore, the thickness of the sealant 100 is moderate, and the sealant 100 will not excessively occupy the space of the pressure regulating chamber 320, thus achieving a balance between gas regulation and sealing effect.

[0053] To verify the sealing performance of the sealant proposed in this application in practical applications, and to ensure that the sealant can effectively prevent the evaporation and leakage of the atomizing liquid, thus guaranteeing the sealing reliability and stability of the electronic atomizer during standing, transportation, and use, a special comparative test was conducted on the sealing effect of the sealant. During the test, a blank control group, a conventional control group, and an experimental group using the sealant proposed in this application were set up. By simulating actual usage conditions, the sealing performance of each group was systematically tested and quantitatively analyzed. The specific test results of the blank control group, the control group, and the experimental group are as follows: Table 1. Proportions for each group Group Proportion Blank group / Control Sample 1 85 parts non-food grade mineral oil, 12 parts industrial grade silica, and 3 parts industrial grade stabilizer (specific ingredients not disclosed). Control sample 2 90 parts food-grade 30# white oil, 8 parts food-grade fumed silica, 2 parts food-grade dispersant (without antioxidants) Example 1 70 parts food-grade No. 10 white oil, 13 parts food-grade hydrophobic fumed silica, 0.5 parts food-grade vitamin E, and 0.2 parts food-grade highly hydrophobic polydimethylsiloxane. Example 2 80 parts food-grade No. 10 white oil, 15 parts food-grade hydrophobic fumed silica, 1.0 part food-grade vitamin E, and 0.5 parts food-grade highly hydrophobic polydimethylsiloxane. Example 3 Food-grade No. 10 white oil (85 parts), food-grade hydrophobic fumed silica (18 parts), food-grade vitamin E (1.5 parts), food-grade highly hydrophobic polydimethylsiloxane (0.8 parts) Example 4 Food-grade No. 10 white oil (82 parts), food-grade hydrophobic fumed silica (17 parts), food-grade vitamin E (0.5 parts), food-grade highly hydrophobic polydimethylsiloxane (0.5 parts). Example 5 Food-grade No. 10 white oil (83 parts), food-grade hydrophobic fumed silica (15.5 parts), food-grade vitamin E (1.0 part), food-grade highly hydrophobic polydimethylsiloxane (0.5 parts). Example 6 80 parts of food-grade No. 10 white oil, 17.7 parts of food-grade hydrophobic fumed silica, 1.5 parts of food-grade vitamin E, and 0.8 parts of food-grade highly hydrophobic polydimethylsiloxane. Table 2 Test results for each group Group Stratification Time Thixotropic index Shelf life Odors and pollution Blank group 0 none 0 None; None Control Sample 1 >2h 2.5 3 months Yes; Yes Control sample 2 1-2h 2.9 6 months Slight; slight Example 1 25min 3.3 12 months None; None Example 2 28min 3.4 12 months None; None Example 3 30min 3.2 12 months None; None Example 4 20min 3.5 12 months None; None Example 5 25min 3.5 12 months None; None Example 6 21min 3.6 12 months None; None Compared with the control group, the sealant of this application has the shortest delamination time, the highest thixotropic index, and the longest shelf life. Moreover, it produces no odor or releases any pollutants during use, and its overall sealing performance and safety are significantly better than the control group.

[0054] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A sealant, characterized in that, The sealant is a liquid, and the sealant is adapted to seal the atomizing liquid of an electronic atomizer. The sealant comprises: Food-grade No. 10 white oil, with a part quantity greater than or equal to 70 and less than or equal to 85; Food-grade hydrophobic fumed silica, with a content greater than or equal to 13 and less than or equal to 18; Food-grade vitamin E, with a serving size greater than or equal to 0.5 and less than or equal to 1.5; and Food-grade highly hydrophobic polydimethylsiloxane, in a proportion greater than or equal to 0.2 and less than or equal to 0.

8.

2. The sealant according to claim 1, characterized in that, The density of the sealant is greater than or equal to 0.85 g / cm³ and less than or equal to 0.88 g / cm³.

3. The sealant according to claim 1, characterized in that, The viscosity of the sealant is greater than or equal to 10000 mPa·s and less than or equal to 13000 mPa·s.

4. The sealant according to claim 1, characterized in that, The sealant has a thixotropic index greater than or equal to 3.2 and less than or equal to 3.

6.

5. The sealant according to claim 1, characterized in that, The thickness of the sealant layer above the atomized liquid is greater than or equal to 1 mm.

6. The sealant according to claim 1, characterized in that, The time for complete stratification after the sealant and the atomizing liquid are mixed is no more than 30 minutes.

7. A method for preparing the sealant according to any one of claims 1 to 6, characterized in that, The preparation method includes the following steps: Prepare materials by weighing food-grade 10# white oil, food-grade hydrophobic fumed silica, food-grade vitamin E, and food-grade highly hydrophobic polydimethylsiloxane. Disperse and mix: Add the weighed food-grade No. 10 white oil to the reactor, turn on the constant temperature device and adjust the temperature inside the reactor to 45℃±2℃, turn on the stirring device and adjust the stirring speed to 300r / min±20r / min, and stir for 5min±1min. To construct the thixotropic system, keep the temperature inside the reactor constant at 45℃±2℃, increase the stirring speed to 500r / min±20r / min, slowly add the weighed food-grade hydrophobic fumed silica into the reactor at a rate of 1~2g / min, and continue high-speed dispersion for 40min±2min after the addition is complete. Adding the additives, the temperature inside the reactor was reduced to 35℃±2℃, the stirring speed was adjusted back to 300r / min±20r / min, and the weighed food-grade vitamin E and food-grade highly hydrophobic polydimethylsiloxane were added in sequence. After adding, stirring was continued for 20min±1min. Degassing and filtration: Turn on the vacuum degassing device of the reactor and control the vacuum degree to -0.08~-0.09MPa for 15min±1min; after degassing, filter the system through a 1μm food-grade filter membrane. Filling: Cool the filtered sealant to 25℃±5℃, fill it into a clean, sealed container, seal and store to obtain the sealant.

8. An electronic atomizer, characterized in that, include: The liquid storage compartment contains atomizing liquid. as well as The sealant according to any one of claims 1 to 6, wherein the sealant is used to isolate the atomized liquid from air, and the sealant is capable of achieving a follow-up seal through thixotropy.

9. The electronic atomizer according to claim 8, characterized in that, The liquid storage chamber includes a liquid storage cavity and a pressure regulating cavity that are interconnected. The bottom end of the pressure regulating cavity has a liquid passage hole that connects to the liquid storage cavity, and the top end of the pressure regulating cavity has a vent hole that connects to the outside. The vent hole is covered with an oil-proof and breathable membrane. The atomizing liquid is stored in the liquid storage cavity, and the sealant is stored in the pressure regulating cavity. The atomizing liquid can flow into the pressure regulating cavity through the liquid passage hole. The oil-proof and breathable membrane is used to prevent the sealant and the atomizing liquid from overflowing from the vent hole. The structure of the pressure regulating cavity is adapted to the storage of the sealant and the requirements for follow-up sealing.

10. The electronic atomizer according to claim 9, characterized in that, The height of the sealant is greater than or equal to 1 mm and less than or equal to 3 mm.

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