Core material containing bamboo ultrafine powder for heating cigarette and preparation process
By using materials such as bamboo ultrafine powder and modified carbon fiber in the heating cigarette core, the miscellaneous gas problems caused by wood pulp fiber are solved, the aroma and smoke volume are improved, the smoking experience is improved, and the goal of low-carbon and environmental protection is achieved.
Patent Information
- Application Number
- CN202510010418.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-03-28
AI Technical Summary
The existing heating cigarette cores contain a large amount of wood pulp fibers, which leads to unpleasant miscellaneous air during the heating process, affecting consumers' suction experience.
The core material containing bamboo ultrafine powder is used to prepare bamboo ultrafine powder through biological coupling treatment such as enzymatic decomposition and crushing, and forms a sheet base and coating liquid with tobacco stem ultrafine powder, wood pulp fiber, modified carbon fiber, etc. to optimize the fragrance composition of the core material and the load capacity of the smoke generator.
It significantly increases the aroma and smoke volume of the heated cigarette, improves the smoking experience, reduces the miscellaneous gas caused by the heating of wood pulp fibers, and reflects the low-carbon environmental protection concept of "using bamboo instead of wood".
Smart Images
Figure CN119699636A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cigarette cores, and in particular to a core material for heating cigarettes containing ultrafine bamboo powder and a preparation process thereof. Background Art
[0002] Heated cigarette core material is a key component of the product. Tobacco material is one of the main components of heated cigarette core material. Through the tobacco pulping, papermaking and molding process, a sheet base with smoke-generating agent and flavor loading capacity and thermal conductivity can be obtained. This sheet base can generate smoke during the heating process and bring out the tobacco aroma components, providing consumers with good smoking quality. In order to improve the taste and smoking experience of heated cigarette core materials, some chemicals such as glycerin and propylene glycol are usually added. These additives can increase the amount of smoke and improve the taste, making the smoking process more comfortable.
[0003] However, the core materials of heated cigarettes commonly found on the market often contain a large amount of wood pulp fiber. When the core materials of heated cigarettes are heated, some unpleasant odors will be produced due to the characteristics of wood pulp fiber. These odors are released during the process of smoking heated cigarettes, thus having a negative impact on consumers' smoking experience. Summary of the invention
[0004] In view of this, the purpose of the present invention is to provide a core material for heated cigarettes containing ultrafine bamboo powder and a preparation process, which can increase the flavor components and smoke agent loading of the core material for heated cigarettes, and increase the aroma and smoke production.
[0005] The present invention solves the above technical problems by the following technical means: In a first aspect, the present invention discloses a core material for heated cigarettes containing ultrafine bamboo powder, comprising a sheet base and a coating liquid, wherein the sheet base comprises the following raw materials in parts by mass: 40-60 parts of ultrafine tobacco stem powder, 10-30 parts of ultrafine bamboo powder, 20-40 parts of wood pulp fiber, 1-10 parts of modified carbon fiber, 0.2-0.5 parts of additives and 3-8 parts of glycerol, and the coating liquid comprises the following raw materials in parts by mass: 10-30 parts of ultrafine bamboo powder, 20-50 parts of ultrafine tobacco leaf powder, 10-30 parts of smoke generating agent, 2-5 parts of fragrance and 2-6 parts of additives.
[0006] Preferably, the particle size of the tobacco stem ultrafine powder, bamboo wood ultrafine powder and tobacco leaf ultrafine powder is 300-600 mesh.
[0007] Preferably, the auxiliary agent is one or more of tamarind polysaccharide, pectin, gum arabic, locust bean gum, guar gum and methyl cellulose.
[0008] The composition principle of the sheet base involves the synergistic effect of multiple ingredients, aiming to optimize the performance and user experience of heated cigarettes. Among them, the ultrafine tobacco stem powder, as the fiber source of the main core material, provides structural support and releases a unique tobacco aroma through refinement. The ultrafine bamboo powder improves the thermal conductivity efficiency of the core material in the sheet base with its excellent heat transfer and heat storage performance and load capacity. The good heat storage performance helps the heat to be evenly distributed, and emits a light bamboo fragrance when heated, enriching the flavor level of heated cigarettes. Wood pulp fiber gives the sheet base good mechanical strength and flexibility, ensures the tensile strength and stability of the core material, and plays the role of connecting other components to enhance the overall performance. After surface treatment, the modified carbon fiber enhances the load capacity and thermal conductivity, making the heating process more efficient. In addition, additives and glycerol are used to improve processing performance and molding state, respectively.
[0009] The composition of the coating liquid further enhances these characteristics. As a functional additive, the ultrafine bamboo powder enhances the aroma release ability and thermal conductivity of the coating liquid, stably releases the bamboo aroma and improves the smoke quality. The ultrafine tobacco powder is the core component of the coating liquid, which significantly enhances the tobacco flavor of the core material, and its refinement ensures the consistency of flavor release. The smoke-generating agent can quickly generate a large amount of uniform smoke, which improves the realism and attractiveness of the heated cigarette, and the evenly distributed smoke-generating agent ensures the stability of smoke release. The flavoring adds a unique flavor layer to the cigarette, and the user experience is enhanced by the deployment of different flavors. The core lies in the stable release of the flavor. The additive improves the fluidity and adhesion performance of the coating liquid, ensures its uniform coating on the substrate, and enhances the adhesion and thermal stability of the coating. In summary, the careful design and proportion of the substrate and its coating liquid jointly achieve the excellent performance and high-quality user experience of heated cigarettes.
[0010] Preferably, the preparation steps of the ultrafine bamboo powder include: removing bamboo leaves from freshly harvested bamboo and cutting into small pieces, washing and drying, enzymolyzing the bamboo pieces with a mixed enzyme preparation, dehydrating, high-temperature inactivating after threading, and crushing into ultrafine bamboo powder.
[0011] Preferably, the mixed enzyme preparation comprises cellulase, xylanase, pectinase, amylase and laccase.
[0012] The preparation of bamboo ultrafine powder is made by biological coupling without any strong chemical treatment. This stage includes enzymatic hydrolysis, thread rolling and high-temperature inactivation. During the enzymatic hydrolysis process, mixed enzyme preparations (including cellulase, xylanase, pectinase, amylase and laccase) work synergistically to degrade the complex components in the bamboo, remove impurities, and make the fiber structure loose, creating conditions for subsequent processing. Next, the thread rolling process increases the surface area of the material, while the high-temperature inactivation ensures that the enzyme activity is inhibited to avoid adverse effects on subsequent processes. And fully retain the properties of bamboo fiber.
[0013] Preferably, the preparation steps of the modified carbon fiber include: S1. Immersing the carbon fiber in a hydrogen peroxide solution, adding citric acid, reacting at 55-65°C for 25-35 minutes, washing and drying to obtain a pretreated carbon fiber; S2. The pretreated carbon fiber is immersed in an aminosilane solution, ultrasonically assisted for 10-20 minutes, and dried to obtain thermally conductive modified carbon fiber; S3. Add the thermally conductive modified carbon fiber into the vanillin solution, add glutaraldehyde crosslinking agent, microwave-assisted treatment for 5-10 minutes, and obtain the modified carbon fiber after drying.
[0014] Preferably, the mass fraction of hydrogen peroxide in step S1 is 2%-4%, the mass fraction of citric acid is 0.01%-0.03%, and the mass fraction of hydroxymethyl melamine in step S2 is 1%-2%.
[0015] First, citric acid is added to the hydrogen peroxide solution for surface activation pretreatment. Hydrogen peroxide introduces a large number of hydroxyl and carboxyl functional groups on the surface of carbon fiber through oxidation, while citric acid, as a chelating agent, regulates the oxidation reaction to avoid excessive corrosion and combines with the surface of carbon fiber to stabilize these functional groups, thereby increasing the surface active sites. Next, in the thermal conductivity modification step, the pretreated carbon fiber is immersed in the aminosilane solution. In this process, the amino groups in the aminosilane molecules react chemically with the hydroxyl and carboxyl groups on the surface of the carbon fiber to form a silicon-oxygen bond (Si-OC). Ultrasonic-assisted treatment makes the aminosilane solution evenly distributed on the surface of the carbon fiber and promotes uniform penetration between molecules, thereby improving the effect of surface modification. Not only does it give the carbon fiber more active sites, but it also improves the thermal conductivity and interface bonding properties of the carbon fiber. Finally, in the vanillin composite modification step, the thermally conductive modified carbon fiber is reacted with the vanillin solution, and glutaraldehyde is added as a crosslinking agent to form a stable three-dimensional network structure. Microwave-assisted treatment accelerates the formation of chemical bonds, further enhances the adhesion of vanillin on the carbon fiber surface, and improves the fragrance loading capacity and thermal stability.
[0016] In the second aspect, the present invention discloses a method for preparing a core material for heated cigarettes containing ultrafine bamboo powder, comprising mixing ultrafine tobacco stem powder, ultrafine bamboo powder, wood pulp fiber, modified carbon fiber, additives and glycerin into a pulp, extracting and separating solid components and an extract, obtaining a sheet base from the solid components through a papermaking and forming process, and mixing the extract with ultrafine bamboo powder, ultrafine tobacco powder, a smoke generating agent, a flavor and an additive to form a coating material, which is calendered and coated on a paper base in the form of a thick slurry, and is dried to obtain the core material for heated cigarettes containing ultrafine bamboo powder.
[0017] Preferably, the papermaking process obtains a base sheet with an absolute dry weight of 30 g / m2 -50g / m 2 .
[0018] Beneficial effects of the present invention: (1) After bio-coupling treatments such as enzymatic hydrolysis and crushing, the surface area and surface activity of bamboo are significantly improved, which greatly enhances the ability to load functional substances (such as smoke-generating agents or aromatic components) and retains the properties of bamboo fibers, thereby optimizing the performance in specific application scenarios, such as more efficient release of flavor substances.
[0019] (2) Through the synergistic effect of hydrogen peroxide and citric acid, the active site density on the carbon fiber surface is effectively increased, overcoming the problems of insufficient functional groups on the surface of traditional carbon fibers and poor bonding performance with materials such as bamboo ultrafine powder. Aminosilane modification significantly improves the thermal conductivity of carbon fibers, making the heat distribution of the core material more uniform when heated, helping to release the aroma of tobacco leaves more fully. At the same time, through vanillin composite network modification, the adsorption and sustained release ability of carbon fibers for spices is significantly enhanced, allowing cigarettes to release a richer and more lasting aroma when heated, significantly improving the aroma quality and intensity of the smoke, greatly improving the smoking experience, and successfully solving the bottleneck of the traditional process where thermal conductivity and adsorption capacity are difficult to balance.
[0020] (3) By utilizing the hollow cavity of bamboo fiber in bamboo ultrafine powder to adsorb and embed aroma components and smoke generating agents such as glycerol, the flavor components and smoke generating agent loading of the core material for heated cigarettes can be increased, and the aroma and smoke volume can be increased; at the same time, the hollow cavity of bamboo fiber is conducive to heat conduction and smoke release during the heating process. Replacing part of the wood pulp fiber with bamboo ultrafine powder can reduce the impurities caused by the heating of wood pulp fiber, and at the same time embodies the emerging low-carbon and environmentally friendly concept of "replacing wood with bamboo". The introduction of modified carbon fiber not only enhances the thermal conductivity of the core material, but also makes the smoke release efficiency higher and the smoke volume larger. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the preparation method of the present invention; Figure 2 The microstructure of the core material product of Example 2 under different magnifications of scanning electron microscope Among them, Figure a: 50μm; Figure b: 100μm; Figure c: 500μm; Figure d: 1000μm. DETAILED DESCRIPTION
[0022] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention: like Figure 1 As shown, the preparation method of the present invention is to first mix tobacco stem ultrafine powder, bamboo ultrafine powder, wood pulp fiber, modified carbon fiber, additives and glycerin into pulp, extract and separate solid components and extract, the solid component is obtained by papermaking and forming process to obtain a sheet base, the extract is then mixed with bamboo ultrafine powder, tobacco leaf ultrafine powder, smoke-generating agent, flavoring agent, and additives to form a coating material, the coating material is calendered and coated on a paper base in the form of a thick slurry, and after drying, a core material for heated cigarettes containing bamboo ultrafine powder is obtained. Example 1
[0023] This embodiment is a preparation method of a core material for heating cigarettes containing ultrafine bamboo powder. 40kg of tobacco stem ultrafine powder, 10kg of bamboo ultrafine powder, 20kg of wood pulp fiber, 1kg of modified carbon fiber, 0.2kg of additives and 3kg of glycerol are mixed into pulp, and the solid component and the extract are extracted and separated. The solid component is obtained by a papermaking and forming process to obtain a sheet base, and the extract is then mixed with 10kg of bamboo ultrafine powder, 20kg of tobacco leaf ultrafine powder, 10kg of smoke generating agent, 2kg of fragrance and 2kg of additives to form a coating material, which is calendered and coated on a paper base in the form of a thick slurry, and is dried to obtain a core material for heated cigarettes containing ultrafine bamboo powder.
[0024] The auxiliary agent is a mixture of tamarind polysaccharide, pectin, gum arabic, locust bean gum, guar gum and methyl cellulose.
[0025] The mixed enzyme preparation includes cellulase, xylanase, pectinase, amylase and laccase.
[0026] The preparation steps of bamboo superfine powder include: 200 kg of freshly harvested bamboo is removed from the leaves and cut into small pieces, washed and dried, the bamboo pieces are enzymatically hydrolyzed with a mixed enzyme preparation, dehydrated, rolled into threads and inactivated at high temperature, and finally crushed into 120 kg of ultrafine bamboo powder; The preparation steps of modified carbon fiber include: S1. 15 kg of carbon fiber was immersed in 75 L of 2% hydrogen peroxide solution, and 15 mL of 0.01% citric acid was added, reacted at 55 ° C for 25 minutes, washed and dried to obtain 14.7 kg of pretreated carbon fiber; S2. 14.7 kg of pretreated carbon fiber was immersed in 73 L of 1% aminosilane solution, ultrasonically assisted for 10 minutes, and dried to obtain 14.5 kg of thermally conductive modified carbon fiber; S3. 14.5 kg of thermally conductive modified carbon fiber was added to 43 L of vanillin solution, 0.21 L of glutaraldehyde crosslinking agent was added, microwave-assisted treatment was performed for 5 minutes, and 14 kg of modified carbon fiber was obtained after drying. Example 2
[0027] This embodiment is a preparation method of a core material for heating cigarettes containing ultrafine bamboo powder. 50kg of tobacco stem ultrafine powder, 20kg of bamboo ultrafine powder, 30kg of wood pulp fiber, 5.5kg of modified carbon fiber, 0.35kg of additives and 5.5kg of glycerol are mixed into pulp, and the solid component and the extract are extracted and separated. The solid component is obtained by a papermaking and forming process to obtain a sheet base, and the extract is then mixed with 20kg of bamboo ultrafine powder, 35kg of tobacco leaf ultrafine powder, 20kg of smoke generating agent, 3.5kg of fragrance and 4kg of additives to form a coating material, which is calendered and coated on a paper base in the form of a thick slurry, and is dried to obtain a core material for heated cigarettes containing bamboo ultrafine powder.
[0028] The auxiliary agent is a mixture of tamarind polysaccharide, pectin, gum arabic, locust bean gum, guar gum and methyl cellulose.
[0029] The mixed enzyme preparation includes cellulase, xylanase, pectinase, amylase and laccase.
[0030] The preparation steps of bamboo superfine powder include: 200 kg of freshly harvested bamboo is removed from the leaves and cut into small pieces, washed and dried, the bamboo pieces are enzymatically hydrolyzed with a mixed enzyme preparation, dehydrated, rolled into threads and inactivated at high temperature, and finally crushed into 120 kg of ultrafine bamboo powder; The preparation steps of modified carbon fiber include: S1. 15 kg of carbon fiber was immersed in 75 L of 3% hydrogen peroxide solution, and 15 mL of 0.02% citric acid was added, reacted at 60 ° C for 30 minutes, washed and dried to obtain 14.7 kg of pretreated carbon fiber; S2. 14.7 kg of pretreated carbon fiber was immersed in 73 L 1.5% aminosilane solution, ultrasonically assisted for 15 minutes, and dried to obtain 14.5 kg of thermally conductive modified carbon fiber; S3. 14.5 kg of thermally conductive modified carbon fiber was added to 43 L of vanillin solution, 0.21 L of glutaraldehyde crosslinking agent was added, microwave-assisted treatment was performed for 7 minutes, and 14 kg of modified carbon fiber was obtained after drying. Example 3
[0031] This embodiment is a preparation method of a core material for heating cigarettes containing ultrafine bamboo powder. 60kg of tobacco stem ultrafine powder, 30kg of bamboo ultrafine powder, 40kg of wood pulp fiber, 10kg of modified carbon fiber, 0.5kg of additives and 8kg of glycerol are mixed into pulp, and the solid component and the extract are extracted and separated. The solid component is obtained by a papermaking and forming process to obtain a sheet base, and the extract is then mixed with 30kg of bamboo ultrafine powder, 50kg of tobacco leaf ultrafine powder, 30kg of smoke generating agent, 5kg of fragrance and 6kg of additives to form a coating material, which is calendered and coated on a paper base in the form of a thick slurry, and is dried to obtain a core material for heated cigarettes containing bamboo ultrafine powder.
[0032] The auxiliary agent is a mixture of tamarind polysaccharide, pectin, gum arabic, locust bean gum, guar gum and methyl cellulose.
[0033] The mixed enzyme preparation includes cellulase, xylanase, pectinase, amylase and laccase.
[0034] The preparation steps of bamboo superfine powder include: 200 kg of freshly harvested bamboo is removed from the leaves and cut into small pieces, washed and dried, the bamboo pieces are enzymatically hydrolyzed with a mixed enzyme preparation, dehydrated, rolled into threads and inactivated at high temperature, and finally crushed into 120 kg of ultrafine bamboo powder; The preparation steps of modified carbon fiber include: S1. 15 kg of carbon fiber was immersed in 75 L of 4% hydrogen peroxide solution, and 15 mL of 0.03% citric acid was added, and the mixture was reacted at 55-65 ° C for 35 minutes, washed and dried to obtain 14.7 kg of pretreated carbon fiber; S2. 14.7 kg of pretreated carbon fiber was immersed in 73 L of 2% aminosilane solution, ultrasonically assisted for 20 minutes, and dried to obtain 14.5 kg of thermally conductive modified carbon fiber; S3. 14.5 kg of thermally conductive modified carbon fiber was added to 43 L of vanillin solution, 0.21 L of glutaraldehyde crosslinking agent was added, microwave-assisted treatment was performed for 10 minutes, and 14 kg of modified carbon fiber was obtained after drying.
[0035] Comparative Example 1 The difference from Example 2 is that the bamboo is only crushed without enzymatic treatment.
[0036] Comparative Example 2 The difference from Example 2 is that the carbon fibers are not modified.
[0037] Comparative Example 3 The difference from Example 2 is that no superfine bamboo powder is added.
[0038] The differences in the indices of the core materials for heated cigarettes containing ultrafine bamboo powder prepared in Examples 1-3 and Comparative Examples 1-3 are shown in Table 1.
[0039] Table 1
[0040] Compared with Comparative Example 2, Example 2 modifies the carbon fiber, which helps to improve the thermal conductivity of the core material, and can more efficiently and evenly transfer heat to the tobacco material, thereby achieving a more stable heating effect. This can not only avoid local overheating or insufficient temperature, but also improve the uniformity of smoke generation, so that smokers can get a richer taste and a more comfortable smoking experience.
[0041] The finished product of the heated cigarette core material of Example 2 was subjected to microstructure analysis by electron microscope scanning. Figure 2 shown.
[0042] The analysis and test results of the scanning electron microscope show that the core coating has a compact and porous microstructure, which is conducive to heat conduction and smoke generation during the heating process.
[0043] The core materials prepared in Examples 1-3 and Comparative Examples 1-3 were placed in a pilot test on the same brand of heated cigarettes, and 5 experts were organized to conduct sensory smoking evaluation. The evaluation results are shown in Table 2.
[0044] Table 2
[0045] When heated and smoked, the heated cigarettes using the core materials containing the ultrafine bamboo powder of Examples 1-3 have improvements in aroma, smoke volume, strength, impurities, uniformity, irritation and aftertaste, which can significantly improve the smoking quality of the heated cigarettes.
[0046] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all known technologies.
Claims
1. A core material for heating cigarettes containing ultrafine bamboo powder, comprising a sheet base and a coating liquid, characterized in that: The sheet base comprises the following raw materials in parts by mass: 40-60 parts of superfine tobacco stem powder, 10-30 parts of superfine bamboo powder, 20-40 parts of wood pulp fiber, 1-10 parts of modified carbon fiber, 0.2-0.5 parts of additives and 3-8 parts of glycerol; the coating liquid comprises the following raw materials in parts by mass: 10-30 parts of superfine bamboo powder, 20-50 parts of superfine tobacco leaf powder, 10-30 parts of smoke generating agent, 2-5 parts of fragrance and 2-6 parts of additives.
2. The core material for heating cigarettes containing ultrafine bamboo powder according to claim 1, characterized in that: The particle sizes of the tobacco stem ultrafine powder, bamboo material ultrafine powder and tobacco leaf ultrafine powder are all 300-600 meshes.
3. The core material for heated cigarettes containing ultrafine bamboo powder according to claim 1, characterized in that: The auxiliary agent is one or more of tamarind polysaccharide, pectin, gum arabic, locust bean gum, guar gum and methyl cellulose.
4. The core material for heated cigarettes containing ultrafine bamboo powder according to claim 1, characterized in that: The preparation steps of the bamboo ultrafine powder include: removing bamboo leaves from freshly picked bamboo and cutting into small pieces, washing and air-drying the pieces, enzymolyzing the bamboo pieces with a mixed enzyme preparation, high-temperature inactivation after threading, and crushing into bamboo ultrafine powder.
5. The core material for heated cigarettes containing ultrafine bamboo powder according to claim 4, characterized in that: The mixed enzyme preparation comprises two or more of cellulase, xylanase, pectinase, amylase and laccase.
6. A method for preparing a core material for heated cigarettes containing ultrafine bamboo powder according to any one of claims 1 to 5, characterized in that: Ultrafine tobacco stem powder, ultrafine bamboo powder, wood pulp fiber, modified carbon fiber, additives and glycerin are mixed into pulp, and solid components and extracts are extracted and separated. The solid components are used to obtain a sheet base through a papermaking and forming process. The extracts are then mixed with ultrafine bamboo powder, ultrafine tobacco powder, smoke-generating agents, flavors and additives to form a coating material. The coating material is calendered and coated on a paper base in the form of a thick slurry, and the core material for heated cigarettes containing ultrafine bamboo powder is obtained after drying.
7. A method for preparing a core material for heated cigarettes containing ultrafine bamboo powder according to claim 6, characterized in that: The papermaking process obtains a base sheet with an absolute dry weight of 30 g / m 2 -50g / m 2 .