Water-based adhesive for cigarettes and preparation method thereof

Abstract

The invention discloses a water-based adhesive for cigarettes and a preparation method thereof, and particularly relates to the field of adhesion of tobacco products, the adhesive is added with fluorescein sodium, so that the adhesive can emit bright green fluorescence under ultraviolet light, the quality detection and anti-counterfeiting functions in the production process are realized, and the adhesive is suitable for large-scale production. Meanwhile, sodium bicarbonate and citric acid react to generate carbon dioxide bubbles, the visualization and controllability of the bonding process are enhanced, through the improvements, the problems that in the prior art, quality control is difficult, and user experience is poor are effectively solved, the performance and the application effect of the adhesive are improved, and the service life of the adhesive is prolonged. The requirements of the modern tobacco industry on efficient, safe and multifunctional adhesives are met.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives for tobacco products. More specifically, the present invention relates to a water-based adhesive for cigarettes and a preparation method thereof. Background Art

[0002] At present, the common water-based adhesives for cigarettes on the market are mainly prepared by mixing components such as chitin, polyethylene glycol, and glycerol, which are high molecular polymers. The main functions of these adhesives are to provide excellent adhesion performance and durability, ensuring a stable bonding effect during the production, storage, and use of cigarettes. Traditional adhesive formulations focus on bonding strength, heat resistance, and water resistance, and utilize the natural antibacterial properties of chitin and the moisturizing properties of polyethylene glycol to further enhance the overall performance of the adhesive. In addition, the addition of nanomaterials such as silver nanoparticles and silica nanoparticles enhances the mechanical strength and antibacterial ability of the adhesive. However, these conventional adhesives still have some defects that cannot be ignored in practical applications;

[0003] In the prior art, although these traditional water-based adhesives for cigarettes can provide basic bonding and protection functions, there are deficiencies in terms of quality control and user experience in actual use. First, the lack of fluorescence characteristics makes it difficult to achieve effective quality control during the production process, unable to quickly identify problems such as uneven coating or omission, which easily leads to an increase in the defective rate of products. Second, adhesives without a bubble effect have poor visualization and controllability during the bonding process, and users cannot intuitively observe the changes during the bonding process, which may affect the accuracy of operation and the final bonding effect. Generally speaking, the existing water-based adhesives for cigarettes have significant deficiencies in terms of anti-counterfeiting, quality control, and user experience, and there is an urgent need for an improved adhesive formulation to make up for these defects. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a water-based adhesive for cigarettes and a preparation method thereof. By adding sodium fluorescein to achieve a fluorescence effect and using sodium bicarbonate and citric acid to generate bubbles, the quality control and user experience are improved to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A water-based adhesive for cigarettes, the adhesive comprising the following components in weight percentages:

[0006] Chitin: 8 - 10%, used to provide basic adhesiveness and antibacterial properties, with a degree of deacetylation higher than 85% to improve solubility and adhesiveness;

[0007] Glycerol: 3 - 5%, as a moisturizing component;

[0008] Polyethylene glycol: 4 - 6%, used to enhance the moisturizing effect;

[0009] Sodium fluorescein: 0.2 - 0.4%, emits fluorescence under ultraviolet light, used for quality inspection and tracking during production and use;

[0010] Sodium bicarbonate: 1 - 2.5%, sodium bicarbonate reacts with citric acid to produce carbon dioxide bubbles;

[0011] Citric acid: 1 - 1.5%, used as a foaming agent and environmentally friendly cross - linker;

[0012] Silica nanoparticles: 0.5 - 1%, particle size is 10 - 50 nanometers;

[0013] Silver nanoparticles: 0.05 - 0.1%, particle size is 1 - 10 nanometers;

[0014] Xanthan gum: 0.2 - 0.4%, xanthan gum is used to increase viscosity;

[0015] Guar gum: 0.2 - 0.4%, guar gum is used to enhance the water resistance and flexibility of the adhesive;

[0016] Epoxidized soybean oil: 1 - 1.5%, used as a cross - linker to improve the bonding strength;

[0017] The remaining part is deionized water.

[0018] In a preferred embodiment, the sodium fluorescein emits bright green fluorescence under ultraviolet light, used for quality control and anti - counterfeiting detection. The concentration of sodium fluorescein is 0.2 - 0.4%, and the addition method of sodium fluorescein is to gradually add it and stir well evenly in the later stage of adhesive preparation.

[0019] In a preferred embodiment, the reaction of sodium bicarbonate and citric acid provides an immediate foaming effect. The proportions of sodium bicarbonate and citric acid are 1.5 - 2.5% and 1 - 1.5% respectively, used to ensure the generation of sufficient carbon dioxide bubbles during the reaction.

[0020] In a preferred embodiment, the fluorescent agent is used as a temperature indicator, and it will show different fluorescence intensities or color changes at different temperatures;

[0021] In a preferred embodiment, 2 - 4% allantoin is added to the adhesive, which acts together with glycerol and polyethylene glycol to improve flexibility and long - term adhesiveness by forming a multi - layer moisture - retaining barrier; 0.5 - 1% vitamin E and nano - silver are added to form an antioxidant and antibacterial system.

[0022] In a preferred embodiment, 0.1 - 0.3% of graphene nanosheets are mixed with silica nanoparticles to construct a three-dimensional conductive network structure and combined with chitin to enhance the adhesion force; sodium fluorescein and allantoin are dissolved in deionized water and stirred under low-temperature conditions to ensure uniform distribution and stability of sodium fluorescein, which is used to provide anti-counterfeiting and quality control effects;

[0023] In a preferred embodiment, 0.01 - 0.05% of menthol is introduced, and its slow release is controlled through microencapsulation technology so that it gradually releases a fresh smell during use and is linked with the fluorescence effect; 0.1 - 0.2% of phase change material is added; 0.5 - 1% of carbon nanotubes are introduced; 1 - 2% of ultrafine ferrite particles are used to endow the adhesive with magnetic response characteristics; 0.3 - 0.5% of ultraviolet absorber is added.

[0024] In a preferred embodiment, a preparation method of a water-based adhesive for cigarettes includes the following steps:

[0025] S1: Dissolve chitin in a 2% acetic acid solution to form a uniform chitin solution; this step is carried out at a temperature of 50 - 60 degrees Celsius to ensure the full dissolution of chitin;

[0026] S2: Add glycerol and polyethylene glycol to the chitin solution and stir evenly to form a composite moisturizing solution; the addition order of glycerol and polyethylene glycol is to add glycerol first and then polyethylene glycol, and each addition requires stirring for 10 - 15 minutes to ensure full mixing;

[0027] S3: Disperse silica nanoparticles and silver nanoparticles in deionized water and stir ultrasonically for 30 - 60 minutes to ensure uniform distribution; the ratio of silica to silver nanoparticles is 10:1;

[0028] S4: Gradually add the nanomaterial solution to the composite moisturizing solution and continuously stir to form a uniform mixture;

[0029] S5: Add sodium fluorescein to the mixture and stir evenly; the addition of sodium fluorescein needs to be carried out in multiple times, and each addition requires stirring for 5 - 10 minutes to ensure its uniform distribution;

[0030] S6: Mix sodium bicarbonate and citric acid in the adhesive to generate bubbles through a slow reaction; the mixing ratio of sodium bicarbonate and citric acid is 2:1 to ensure the stability and persistence of the bubbles;

[0031] S7: Add xanthan gum and guar gum and stir until completely dissolved to form a viscous adhesive matrix; the ratio of xanthan gum to guar gum is 1:1 to enhance the viscosity and flexibility of the adhesive;

[0032] S8: Add epoxidized soybean oil as a crosslinking agent to further enhance the bonding strength and durability. The addition amount of epoxidized soybean oil is 1 - 1.5%, which is gradually added during the stirring process to ensure thorough mixing.

[0033] S9: Continue stirring at low temperature to ensure thorough mixing of all components, and optimize the performance of the adhesive by adjusting the pH value and solid content. This step needs to be carried out at a temperature of 5 - 10 °C to prevent the influence of high temperature on the performance of the adhesive.

[0034] In a preferred embodiment, the sodium fluorescein is dissolved in deionized water and its uniform distribution is detected under ultraviolet light.

[0035] The mixing step of sodium bicarbonate and citric acid is carried out at room temperature to ensure the slow release of bubbles during the reaction.

[0036] Technical effects and advantages of the present invention:

[0037] 1. The water - based adhesive for cigarettes of the present invention emits bright green fluorescence under ultraviolet light by adding 0.2 - 0.4% of sodium fluorescein, which is used for quality control and anti - counterfeiting detection, effectively improving the recognition and safety of the product.

[0038] 2. By adding 1 - 2.5% of sodium bicarbonate and 1 - 1.5% of citric acid, carbon dioxide bubbles are generated during use, providing an immediate bubble effect, enhancing the visualization and control of the bonding process, and improving the user experience.

[0039] 3. Adding 2 - 4% of allantoin, acting together with glycerol and polyethylene glycol, forms a multi - layer moisture - retaining barrier, effectively improving the flexibility and long - term adhesiveness of the adhesive, and ensuring comfort during use.

[0040] 4. 0.5 - 1% of vitamin E and 0.05 - 0.1% of nano - silver form an antioxidant and antibacterial system, preventing the oxidative degradation of the adhesive and the growth of bacteria, extending the service life of the product, and ensuring its stability in different environments.

[0041] 5. 0.1 - 0.3% of graphene nanosheets and 0.5 - 1% of silicon dioxide nanoparticles construct a three - dimensional conductive network structure, improving the conductivity, mechanical strength and thermal stability of the adhesive, and enhancing the adhesive force and durability.

[0042] 6. By introducing 0.01 - 0.05% of menthol and using micro - capsule technology to control the slow release, it gradually releases a fresh smell during use, increasing the sensory experience of the product. At the same time, combined with the fluorescence effect, it improves the anti - counterfeiting and quality control effects. Detailed implementation mode

[0043] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0044] A water-based adhesive for cigarettes according to an embodiment of the present invention, the adhesive comprising the following components in weight percentages:

[0045] Chitin: 8-10%, used to provide basic adhesiveness and antibacterial properties, with a degree of deacetylation higher than 85% to improve solubility and adhesiveness. This ratio is used to ensure that the adhesive has sufficient adhesive force and antibacterial performance while ensuring its solubility in water;

[0046] Glycerol: 3-5%, as a moisturizing component to enhance flexibility and durability. An appropriate amount of glycerol can balance the flexibility and hardness of the adhesive and prevent it from becoming brittle at low temperatures;

[0047] Polyethylene glycol (PEG): 4-6%, used to enhance the moisturizing effect and improve the high-temperature resistance of the adhesive. An appropriate ratio of PEG can effectively improve the temperature stability of the adhesive, enabling it to maintain adhesiveness under high-temperature conditions;

[0048] Sodium fluorescein: 0.2-0.4%, which emits fluorescence under ultraviolet light and is used for quality inspection and tracking during production and use. Sodium fluorescein within this range can ensure a significant and stable fluorescence effect;

[0049] Sodium bicarbonate: 1-2.5%, sodium bicarbonate reacts with citric acid to produce carbon dioxide bubbles, providing an immediate bubble effect and enhancing the visual effect during the bonding process. This ratio ensures the stability and persistence of bubble generation;

[0050] Citric acid: 1-1.5%, as a foaming agent and environmentally friendly cross-linking agent, reacts with sodium bicarbonate to produce bubbles and provides good biodegradability and safety. This ratio ensures the consistency of the bubble effect and environmental performance;

[0051] Silica nanoparticles: 0.5-1%, with a particle size of 10-50 nanometers, used to improve mechanical strength and heat resistance and enhance the bonding effect. This ratio and particle size range can significantly improve the physical properties of the adhesive. The particle size of the silica nanoparticles is 10-50 nanometers to ensure its uniform dispersion and improve the physical properties of the adhesive. The addition amount of the silica nanoparticles is 0.5-1%, and within this ratio range, the mechanical strength and heat resistance of the adhesive can be significantly improved. The dispersion method of the silica nanoparticles adopts ultrasonic stirring to ensure its uniform distribution in the adhesive;

[0052] Silver nanoparticles: 0.05 - 0.1%, with a particle size of 1 - 10 nanometers, are used to increase antibacterial properties and extend the service life. This proportion ensures antibacterial effects without affecting other properties. The particle size of the silver nanoparticles is 1 - 10 nanometers, ensuring their effective antibacterial performance. The addition proportion of silver nanoparticles is 0.05 - 0.1%, which can provide a strong antibacterial effect at low concentrations, prevent the growth of bacteria and molds, and thus extend the service life of the adhesive. During the preparation process of silver nanoparticles, they are dispersed in deionized water and subjected to ultrasonic treatment to ensure their uniform distribution;

[0053] Xanthan gum: 0.2 - 0.4%, xanthan gum is used to increase viscosity, provide better coating performance and stability, and an appropriate amount of xanthan gum can improve the construction performance of the adhesive;

[0054] Guar gum: 0.2 - 0.4%, guar gum is used to enhance the water resistance and flexibility of the adhesive, and this proportion ensures that the adhesive can still maintain excellent performance when the humidity changes;

[0055] Epoxidized soybean oil: 1 - 1.5%, as a cross - linker to enhance the bonding strength while maintaining environmental friendliness, this proportion can balance strength and environmental protection;

[0056] The remaining part is deionized water. The use of deionized water ensures the purity of the adhesive and avoids impurities affecting its performance.

[0057] The sodium fluorescein emits bright green fluorescence under ultraviolet light irradiation and is used for quality control and anti - counterfeiting detection. The concentration of sodium fluorescein is 0.2 - 0.4%, ensuring sufficient fluorescence intensity at low concentrations while avoiding affecting other properties of the adhesive. The addition method of sodium fluorescein is to gradually add it and stir well during the later stage of adhesive preparation to ensure its uniform distribution throughout the adhesive.

[0058] The reaction between sodium bicarbonate and citric acid provides an instant bubbling effect, improving the user experience and visual effect. The proportions of sodium bicarbonate and citric acid are 1.5 - 2.5% and 1 - 1.5% respectively, used to ensure sufficient carbon dioxide bubbles are generated during the reaction. The generation of bubbles can not only enhance the visual effect but also produce a microstructure during use, which helps to improve the bonding performance.

[0059] The fluorescent agent is used as a temperature indicator and will show different fluorescence intensities or color changes at different temperatures.

[0060] It should also be noted that adding 2-4% allantoin to the adhesive works together with glycerol and polyethylene glycol to improve flexibility and long-term adhesion by forming a multi-layer moisturizing barrier; adding 0.5-1% vitamin E and nanosilver forms an antioxidant and antibacterial system to prevent oxidative degradation and bacterial growth.

[0061] 0.1-0.3% of graphene nanosheets are mixed with silica nanoparticles to construct a three-dimensional conductive network structure to improve conductivity, mechanical strength and thermal stability, and combined with chitin to enhance adhesion; sodium fluorescein and allantoin are dissolved in deionized water and stirred at low temperature to ensure uniform distribution and stabilize sodium fluorescein to provide anti-counterfeiting and quality control effects;

[0062] 0.01-0.05% menthol is introduced, and the sustained release is controlled by microencapsulation technology, so that it gradually releases a fresh smell during use, and is linked with the fluorescent effect to improve the anti-counterfeiting and quality control effects; 0.1-0.2% phase change material (PCM), such as paraffin particles, is added, and its heat absorption and heat release characteristics are used to adjust the temperature during the bonding process to provide stable bonding; an additional 0.5-1% of carbon nanotubes are introduced to enhance the mechanical properties and thermal conductivity of the adhesive for high-strength and high-temperature applications; 1-2% of ultrafine ferrite particles are used to give the adhesive a magnetic response characteristic, which can be used for magnetic field control and positioning in specific situations; by adding 0.3-0.5% of ultraviolet absorbers, the stability of the adhesive under ultraviolet irradiation is protected and the service life is extended.

[0063] In addition, firstly, 2-4% of allantoin is added to the adhesive to work together with glycerin and polyethylene glycol to form a multi-layer moisturizing barrier. As a highly effective moisturizer, allantoin can not only retain moisture, but also repair the stratum corneum, so that the adhesive still has flexibility and stickiness after long-term use. Glycerin and polyethylene glycol are commonly used moisturizers, providing basic moisturizing effects, and synergistically working with allantoin to greatly improve the overall performance of the adhesive. In addition, 0.5-1% of vitamin E and nanosilver are added to construct an antioxidant and antibacterial system. Vitamin E effectively prevents oxidative degradation of the adhesive and prolongs its service life; nanosilver prevents bacterial growth through its broad-spectrum antibacterial properties and keeps the adhesive clean and stable.

[0064] In addition, 0.1-0.3% of graphene nanosheets and silica nanoparticles are introduced into the adhesive to construct a three-dimensional conductive network structure, and chitin is combined to improve the adhesion. As an excellent conductive material, graphene nanosheets can form a continuous conductive path in the adhesive to enhance its conductivity; silica nanoparticles improve the mechanical strength and thermal stability. Sodium fluorescein and allantoin are dissolved in deionized water by low-temperature stirring to ensure the uniform distribution and stability of sodium fluorescein. Sodium fluorescein emits fluorescence under ultraviolet light irradiation, which is used for anti-counterfeiting and quality control to ensure the consistency and reliability of the adhesive during production and use;

[0065] In practical applications, the present invention also enhances the functionality of the adhesive through the introduction of a series of innovative materials. 0.01-0.05% of menthol is introduced, and its slow release is achieved through microcapsule technology, so that a fresh smell is gradually released during use to enhance the user experience. In addition, 0.1-0.2% of phase change materials, such as paraffin microparticles, are added, and their endothermic and exothermic characteristics are used to regulate the temperature during the bonding process to ensure a stable bonding effect. Furthermore, the introduction of 0.5-1% of carbon nanotubes improves the mechanical properties and thermal conductivity of the adhesive, making it perform excellently in high-strength and high-temperature environments. At the same time, by adding 1-2% of ultrafine ferrite particles, the adhesive has magnetic response characteristics and can achieve specific control and positioning under the action of a magnetic field. Finally, by adding 0.3-0.5% of ultraviolet absorbers, the stability of the adhesive under ultraviolet irradiation is protected, and its service life in outdoor environments is extended. In summary, through the optimization and combination of various innovative components, the present invention significantly improves the comprehensive performance and application range of the water-based adhesive for cigarettes.

[0066] A preparation method of a water-based adhesive for cigarettes comprises the following steps:

[0067] S1: Dissolve chitin in a 2% acetic acid solution to form a uniform chitin solution; this step is carried out at a temperature of 50-60 degrees Celsius to ensure the complete dissolution of chitin;

[0068] S2: Add glycerol and polyethylene glycol to the chitin solution and stir evenly to form a composite moisturizing solution; the addition order of glycerol and polyethylene glycol is to add glycerol first and then polyethylene glycol, and each addition requires stirring for 10-15 minutes to ensure thorough mixing;

[0069] S3: Disperse silica nanoparticles and silver nanoparticles in deionized water and stir ultrasonically for 30-60 minutes to ensure uniform distribution; the ratio of silica and silver nanoparticles is 10:1 to optimally enhance the physical properties and antibacterial effect of the adhesive;

[0070] S4: Gradually add the nanomaterial solution to the composite moisturizing solution and continuously stir to form a homogeneous mixture. It should be noted that this process needs to be carried out under low-speed stirring to avoid the generation of bubbles;

[0071] S5: Add sodium fluorescein to the mixture and stir evenly; the addition of sodium fluorescein needs to be carried out in multiple times, and after each addition, stir for 5 - 10 minutes to ensure its uniform distribution;

[0072] S6: Mix sodium bicarbonate and citric acid in the adhesive to generate bubbles through a slow reaction; the mixing ratio of sodium bicarbonate and citric acid is 2:1 to ensure the stability and persistence of the bubbles;

[0073] S7: Add xanthan gum and guar gum and stir until completely dissolved to form a viscous adhesive matrix; the ratio of xanthan gum to guar gum is 1:1 to enhance the viscosity and flexibility of the adhesive;

[0074] S8: Add epoxidized soybean oil as a crosslinking agent to further enhance the bonding strength and durability; the addition amount of epoxidized soybean oil is 1 - 1.5%, and it is gradually added during the stirring process to ensure thorough mixing;

[0075] S9: Continue to stir at low temperature to ensure that all components are thoroughly mixed, and optimize the performance of the adhesive by adjusting the pH value and solid content; this step needs to be carried out at a temperature of 5 - 10 °C to prevent the influence of high temperature on the performance of the adhesive.

[0076] The sodium fluorescein is dissolved in deionized water and its uniform distribution is detected under ultraviolet light. Through ultraviolet light detection, it can be ensured that the sodium fluorescein is evenly distributed in the adhesive, thus guaranteeing its quality control and anti-counterfeiting function;

[0077] The mixing step of the sodium bicarbonate and citric acid is carried out at room temperature to ensure the slow release of bubbles during the reaction. Mixing at room temperature can prevent the reaction from being too fast and ensure the stability and uniformity of the bubbles.

[0078] The adhesive emits fluorescence under ultraviolet light and generates bubbles during use, improving the visualization and control of the bonding process, and at the same time having high strength, durability, antibacterial properties and environmental protection characteristics. The characteristics of fluorescence and bubbles not only improve the quality control and user experience, but also enhance the adhesion and durability of the adhesive. By using chitin, glycerol, polyethylene glycol, sodium fluorescein, sodium bicarbonate, citric acid, silicon dioxide nanoparticles, silver nanoparticles, xanthan gum, guar gum and epoxidized soybean oil in combination, this multifunctional adhesive can meet the multiple requirements of the modern tobacco industry. The anti-counterfeiting function of sodium fluorescein and the instant visual feedback of the bubbles make the adhesive safer and more efficient during use;

[0079] The addition of sodium fluorescein is not only used for quality inspection but also for anti-counterfeiting. The authenticity of cigarettes can be verified by ultraviolet light irradiation, improving product safety. Sodium fluorescein provides the best fluorescence effect within the concentration range of 0.2 - 0.4%, and ensures its application in the production and logistics processes;

[0080] The reaction of sodium bicarbonate and citric acid produces bubbles, which can gradually release fragrances or other functional components, such as menthol, during the bonding process, enabling the cigarette to gradually release a fresh smell during combustion and enhancing the user's smoking experience. By adjusting the ratio of sodium bicarbonate and citric acid, the speed and duration of bubble and fragrance release can be controlled;

[0081] The addition of the foaming agent can form a microporous structure in the adhesive layer, which can absorb and release stress when damaged, contributing to self-repair and extending the service life of the bonded part. The microporous structure formed by the bubbles not only enhances the adhesion of the adhesive but also provides a self-repair function, significantly improving the durability and reliability of the adhesive.

[0082] The fluorescent agent will exhibit different fluorescence intensities or color changes at different temperatures, which can be used as a temperature indicator to help monitor the ambient temperature of cigarettes during transportation and storage, ensuring product quality. The temperature-sensitive fluorescent agent is not only used for anti-counterfeiting but also as part of product quality monitoring to ensure product quality under various environmental conditions.

[0083] It should be noted that chitin is used in the present invention to provide basic adhesiveness and antibacterial properties. In the experiment, chitin was dissolved in a 2% acetic acid solution to ensure its uniform distribution. The addition amount of chitin is 8 - 10%, and a degree of deacetylation higher than 85% is used to improve solubility and adhesiveness. Experimental data show that 8 - 10% of chitin can ensure the solubility of the adhesive in water while providing sufficient adhesiveness and antibacterial properties. A too low ratio will result in insufficient adhesiveness, and a too high ratio will affect the fluidity of the adhesive;

[0084] Glycerol is used as a moisturizing component. Experiments show that 3 - 5% of glycerol can significantly improve the flexibility and durability of the adhesive. Specific experimental data show that 3% of glycerol can provide a good moisturizing effect, and 5% of glycerol can further enhance flexibility. However, exceeding this range will make the adhesive too viscous, affecting the use experience. The addition amount of polyethylene glycol (PEG) is 4 - 6%, which is used to enhance the moisturizing effect and improve the high-temperature resistance performance. Experimental results show that 4% of PEG is sufficient to enhance the moisturizing effect, and 6% of PEG can maintain adhesiveness under high-temperature conditions. Exceeding 6% will cause the viscosity of the adhesive to be too high;

[0085] Sodium fluorescein performs best within the concentration range of 0.2 - 0.4%. Experimental data shows that sodium fluorescein at this concentration can emit bright green fluorescence under ultraviolet light and is used for quality control and anti-counterfeiting detection. When the concentration is lower than 0.2%, the fluorescence effect is not obvious, while when it is higher than 0.4%, it will affect other properties of the adhesive. The proportions of sodium bicarbonate and citric acid are 1 - 2.5% and 1 - 1.5% respectively. Experiments show that this proportion can generate sufficient carbon dioxide bubbles during the reaction to ensure the stability and persistence of the bubbles. Specific data shows that the reaction effect is best when 1.5 - 2.5% of sodium bicarbonate reacts with 1 - 1.5% of citric acid, and the bubble generation is stable and controllable;

[0086] The addition amount of silica nanoparticles is 0.5 - 1%, and the particle size is 10 - 50 nanometers. Experimental results show that this proportion and particle size range can significantly improve the mechanical strength and heat resistance of the adhesive. When the addition amount is lower than 0.5%, the effect is not obvious, while when it exceeds 1%, it may affect the fluidity and operability of the adhesive. The addition proportion of silver nanoparticles is 0.05 - 0.1%, and the particle size is 1 - 10 nanometers. Experimental data shows that this proportion can provide a strong antibacterial effect at a low concentration, prevent the growth of bacteria and molds, and extend the service life of the adhesive. Exceeding this concentration may affect other properties of the adhesive;

[0087] The proportions of xanthan gum and guar gum are both 0.2 - 0.4%. Experimental results show that this proportion can increase the viscosity and flexibility of the adhesive, and at the same time enhance the water resistance. When it is lower than this range, the effect is not obvious, and when it exceeds this range, the adhesive will become too viscous. The addition amount of epoxidized soybean oil as a cross-linking agent is 1 - 1.5%. Experimental data shows that this proportion can effectively improve the bonding strength while maintaining environmental protection characteristics. When it is lower than 1%, the effect is not obvious, and when it exceeds 1.5%, it may affect other properties of the adhesive;

[0088] During the preparation process, silica nanoparticles and silver nanoparticles are dispersed in deionized water and stirred ultrasonically for 30 - 60 minutes to ensure uniform distribution. Experiments show that a stirring time of 30 minutes can achieve a basic uniform distribution, while 60 minutes ensures the best uniformity. When adding sodium fluorescein, it needs to be added in multiple times, and it needs to be stirred for 5 - 10 minutes each time to ensure its uniform distribution. Experimental data shows that a stirring time of 5 minutes can achieve a preliminary uniformity, and 10 minutes ensures a completely uniform distribution;

[0089] Sodium bicarbonate and citric acid are mixed in the adhesive, and bubbles are generated through a slow reaction. The mixing ratio of sodium bicarbonate and citric acid is 2:1. Experiments show that this ratio can ensure the stability and persistence of the bubbles. Below this ratio, the effect is not good, and above this ratio, the bubbles will be generated too fast and difficult to control. The ratio of xanthan gum and guar gum is 1:1 to enhance the viscosity and flexibility of the adhesive. Experimental data supports that this ratio can provide the best balance of viscosity and flexibility;

[0090] During the process of adding epoxidized soybean oil, its addition amount is 1-1.5%, and it is gradually added during stirring to ensure thorough mixing. Experiments show that gradually adding and fully stirring can ensure the full combination of epoxidized soybean oil with other components to form a stable cross-linked structure. Below 1%, the effect is not obvious, and exceeding 1.5% will make the adhesive become too hard. Stir at a low temperature to ensure thorough mixing of all components, and optimize the performance of the adhesive by adjusting the pH value and solid content. Experiments show that stirring at a temperature of 5-10 degrees Celsius can prevent the influence of high temperature on the performance of the adhesive and ensure the uniform distribution and stability of all components;

[0091] Introduce 0.01-0.05% of menthol, and control the slow release through microcapsule technology. Experiments show that this concentration range can provide a continuous fragrance release effect and enhance the user experience. Add 0.1-0.2% of phase change materials such as paraffin microparticles, which can effectively regulate the temperature and ensure the temperature stability during the bonding process. Carbon nanotubes significantly improve the mechanical properties and thermal conductivity of the adhesive within the concentration range of 0.5-1%. Ultrafine ferrite particles ensure the magnetic response characteristics of the adhesive within the concentration range of 1-2%. Ultraviolet absorbers effectively protect the stability of the adhesive under ultraviolet irradiation and extend its service life within the concentration range of 0.3-0.5%.

[0092] Through these experimental data and analyses, it can be proved that the ratio setting of each component is scientifically reasonable, can achieve the expected functions and effects, and ensure the excellent performance of the water-based adhesive for cigarettes in practical applications.

[0093] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water-based adhesive for cigarettes, characterized in that, The adhesive contains the following components by weight percentage: Chitin: 8 - 10%, which is used to provide basic adhesiveness and antibacterial properties, and the degree of deacetylation is higher than 85% to improve solubility and adhesiveness; Glycerol: 3 - 5%, which serves as a moisturizing component; Polyethylene glycol: 4 - 6%, which is used to enhance the moisturizing effect; Sodium fluorescein: 0.2 - 0.4%, which emits fluorescence under ultraviolet light and is used for quality inspection and tracking during production and use; Sodium bicarbonate: 1 - 2.5%, and sodium bicarbonate reacts with citric acid to produce carbon dioxide bubbles; Citric acid: 1 - 1.5%, which serves as a foaming agent and an environmentally friendly cross - linker; Silica nanoparticles: 0.5 - 1%, with a particle size of 10 - 50 nanometers; Silver nanoparticles: 0.05 - 0.1%, with a particle size of 1 - 10 nanometers; Xanthan gum: 0.2 - 0.4%, and xanthan gum is used to increase viscosity; Guar gum: 0.2 - 0.4%, and guar gum is used to enhance the water resistance and flexibility of the adhesive; Epoxidized soybean oil: 1 - 1.5%, which serves as a cross - linker to improve the bonding strength; The remaining part is deionized water.

2. The water-based adhesive for cigarettes according to claim 1, wherein The sodium fluorescein emits bright green fluorescence under ultraviolet light irradiation, which is used for quality control and anti - counterfeiting detection. The concentration of sodium fluorescein is 0.2 - 0.4%, and the addition method of sodium fluorescein is to gradually add it and stir well evenly in the later stage of adhesive preparation.

3. The water-based adhesive for cigarettes according to claim 2, wherein, The reaction of sodium bicarbonate and citric acid provides an instant foaming effect. The proportions of sodium bicarbonate and citric acid are 1.5 - 2.5% and 1 - 1.5% respectively, which are used to ensure the generation of sufficient carbon dioxide bubbles during the reaction.

4. The water-based adhesive for cigarettes according to claim 3, wherein The fluorescent agent is used as a temperature indicator and will show different fluorescence intensities or color changes at different temperatures.

5. The water-based adhesive for cigarettes according to claim 4, characterized in that, Add 2 - 4% of allantoin to the adhesive, which acts together with glycerol and polyethylene glycol to improve flexibility and long - term adhesiveness by forming a multi - layer moisturizing barrier; add 0.5 - 1% of vitamin E and nano - silver to form an antioxidant and antibacterial system.

6. The water-based adhesive for cigarettes according to claim 5, wherein, Mix 0.1 - 0.3% of graphene nanosheets with silica nanoparticles to construct a three - dimensional conductive network structure and combine with chitin to enhance the adhesive force; dissolve sodium fluorescein and allantoin in deionized water and stir at low temperature to ensure uniform distribution and stabilize sodium fluorescein, which is used to provide anti - counterfeiting and quality control effects.

7. The water-based adhesive for cigarettes according to claim 6, characterized in that, Introduce 0.01 - 0.05% of menthol, and control its slow release through micro - capsule technology so that it gradually releases a fresh smell during use and is linked with the fluorescence effect; add 0.1 - 0.2% of phase - change materials; introduce 0.5 - 1% of carbon nanotubes; use 1 - 2% of ultrafine ferrite particles to make the adhesive have magnetic response characteristics; add 0.3 - 0.5% of ultraviolet absorber.

8. A preparation method of a water-based adhesive for cigarettes, characterized in that, It includes the following steps: S1: Dissolve chitin in a 2% acetic acid solution to form a uniform chitin solution; this step is carried out at a temperature of 50 - 60 degrees Celsius to ensure the full dissolution of chitin; S2: Add glycerol and polyethylene glycol to the chitin solution and stir evenly to form a composite moisturizing solution; the addition order of glycerol and polyethylene glycol is to add glycerol first and then polyethylene glycol, and stir for 10 - 15 minutes after each addition to ensure thorough mixing; S3: Disperse silica nanoparticles and silver nanoparticles in deionized water and stir ultrasonically for 30 - 60 minutes to ensure uniform distribution; the ratio of silica to silver nanoparticles is 10:1; S4: Gradually add the nanomaterial solution to the composite moisturizing solution and keep stirring to form a homogeneous mixture; S5: Add sodium fluorescein to the mixture and stir evenly; the addition of sodium fluorescein needs to be carried out in multiple times, and stir for 5 - 10 minutes after each addition to ensure its uniform distribution; S6: Mix sodium bicarbonate and citric acid in the adhesive to produce bubbles through a slow reaction; the mixing ratio of sodium bicarbonate and citric acid is 2:1 to ensure the stability and persistence of the bubbles; S7: Add xanthan gum and guar gum and stir until completely dissolved to form a viscous adhesive matrix; the ratio of xanthan gum to guar gum is 1:1 to enhance the viscosity and flexibility of the adhesive; S8: Add epoxidized soybean oil as a cross - linker to further enhance the bonding strength and durability; the addition amount of epoxidized soybean oil is 1 - 1.5%, and it is gradually added during the stirring process and ensure thorough mixing; S9: Continue to stir at low temperature to ensure thorough mixing of all components, and optimize the performance of the adhesive by adjusting the pH value and solid content; this step needs to be carried out at a temperature of 5 - 10 °C to prevent the influence of high temperature on the adhesive performance.

9. The preparation method of the water-based adhesive for cigarettes according to claim 8, characterized in that, The sodium fluorescein is dissolved in deionized water and its uniform distribution is detected under ultraviolet light; The mixing step of sodium bicarbonate and citric acid is carried out at room temperature to ensure the effect of slow - release bubbles in the reaction.