A heated cigarette rod, and a method of making and using the same
By introducing both immediate and sustained release mechanisms into the heated cigarette core, the problem of inconsistent volatilization of atomizing agents and aroma compounds during heating is solved, achieving stability in smoke release and persistence of flavor, thus enhancing the consumer's smoking experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHENGZHOU TOBACCO RES INST OF CNTC
- Filing Date
- 2024-09-24
- Publication Date
- 2026-08-04
AI Technical Summary
In existing heated cigarette core materials, the atomizing agent, aroma substances, and tobacco substances volatilize inconsistently during the heating process, resulting in inconsistent sensory experiences for consumers with each puff, low smoke release with each puff, and insufficient retention of flavor components.
Employing a coupled mechanism of immediate and sustained release, the system incorporates an atomizing agent core, an aroma layer, and a tobacco layer within the cigarette core. By combining the atomizing agent hydrogel core, a sustained-release coating, and an immediate-release atomizing agent layer, the system regulates the amount and stability of smoke release, thereby improving the consistency of the volatilization of the atomizing agent and aroma substances.
It achieves stability and uniformity in smoke release, improves the consumer's smoking experience, and ensures the stability of smoke release and the persistence of flavor with each puff.
Smart Images
Figure CN118902163B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of heated cigarette technology, specifically relating to a heated cigarette core, its preparation method, and its uses. Background Technology
[0002] With the improvement of people's living standards and the strengthening of tobacco control, new requirements for "harm reduction" have been put forward for cigarette products, giving rise to new types of tobacco products. Heated cigarettes, as an important category of new tobacco products, involve heating the tobacco core at 200-400℃, causing distillation and pyrolysis to release nicotine and flavor components, thus meeting consumer demand. Because the harmful or potentially harmful components in the smoke aerosol are significantly reduced under low-temperature heating, heated cigarettes have become a field of widespread interest for tobacco companies and tobacco industry researchers both domestically and internationally in recent years.
[0003] However, in existing tobacco filler materials, atomizing agents, aroma compounds, and tobacco substances are generally obtained by blending and molding tobacco particles or tobacco sheets. While the components in tobacco particles and sheets are relatively uniformly distributed, the different release temperatures of each component lead to inconsistent thermal volatilization of the atomizing agent, aroma compounds, and tobacco substances. Because atomizing agents and aroma compounds are released more easily at lower volatilization temperatures, while nicotine and the natural aroma components released through pyrolysis require a wider temperature range, consumers experience inconsistent puff-by-puff sensory experiences and a lack of prominence in the natural tobacco aroma.
[0004] It is quite obvious that, compared with traditional cigarettes, heated cigarettes release less smoke in the first puff than in the second to fifth puffs due to the lag in temperature conduction during the heating process, and the smoke gradually decreases with each puff thereafter. In addition, due to the addition of flavor components and the need to improve the aroma retention level, the product is prone to insufficient retention of aroma components and a lack of richness in the "fragrance" and "taste" of the smoking experience.
[0005] To address at least one of the above-mentioned problems, this invention is proposed. Summary of the Invention
[0006] This invention prepares a heated cigarette core through a quick-release and slow-release coupling mechanism. The quick-release layer increases the initial release of heated smoke aerosol, while the slow-release layer regulates the smoke release rate and the stable release amount per puff, reducing the sensory impact caused by the decay of smoke per puff and improving the consumer's sensory experience.
[0007] The first aspect of this application provides a heated cigarette core, the core comprising: an atomizing agent core, an aroma layer surrounding the atomizing agent core, and a tobacco layer surrounding the aroma layer; the atomizing agent core contains a first atomizing agent;
[0008] The atomizing agent core includes: an atomizing agent hydrogel core, which is a hydrogel containing the first atomizing agent and a first cross-linked network structure material.
[0009] Preferably, the atomizing agent core further includes a sustained-release coating layer surrounding the atomizing agent hydrogel core; the sustained-release coating layer is a membrane material that can form pores when heated, and the heating temperature is 60 to 200 degrees Celsius.
[0010] Preferably, the atomizing agent core further includes: a fast-release atomizing agent gel layer located around the sustained-release coating layer, wherein the fast-release atomizing agent gel layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material.
[0011] Preferably, the first cross-linked network structure material is cellulose nanofiber, such as one or more of cellulose nanocrystals (CNC), cellulose nanofibers (CNF), and microcrystalline cellulose (MCC). The material is in particulate form, preferably with a diameter ranging from 5-50 nm and a length ranging from 50 nm to 20 μm.
[0012] Preferably, the membrane material of the sustained-release coating layer that is prone to forming pores when heated is selected from one or more of ethyl cellulose and its derivatives, cationic guar gum, and polyacrylic acid series polymers, with a size of 60-100 mesh and a heat deformation temperature of 100-300 degrees Celsius.
[0013] The sustained-release coating layer is prone to plastic deformation and thinning when heated, allowing small molecules of the internal atomizing agent to break through the film and release. The sustained-release coating layer material is selected from one or more of ethyl cellulose and its derivatives, cationic guar gum, and polyacrylic acid series polymers, with a heat deformation temperature of 100-300 degrees Celsius.
[0014] Preferably, the second skeleton material is selected from one or more of sodium carboxymethyl cellulose, hydroxypropyl cellulose, and methyl cellulose, with a diameter range of 5-50 nm and a length range of 400 nm-20 μm.
[0015] Of course, the first cross-linked network structure material and the second cross-linked network structure material can also be selected from other materials that can form a gel with the atomizing agent.
[0016] Preferably, the second atomizing agent is the same as the first atomizing agent, or the boiling point of the second atomizing agent is lower than that of the first atomizing agent.
[0017] Preferably, the atomizing agent hydrogel core further contains a fragrance substance, and / or the fast-release atomizing agent gel layer further contains a fragrance substance.
[0018] The first atomizing agent and the second atomizing agent are independently selected from one or more polyols, such as glycerol, propylene glycol, etc.
[0019] The second aspect of this application provides a method for preparing the heated cigarette core described in the first aspect, which includes the following steps:
[0020] Step 1: Mix raw materials including a first atomizing agent, a first cross-linked network structure material and water to form the atomizing agent hydrogel core;
[0021] Step 2: Wrap a heat-sensitive, easily deformable material around the inner core of the atomizing hydrogel to form a sustained-release coating layer;
[0022] Step 3: Mix the raw materials including the second atomizing agent, the second cross-linked network structure material and water to form a hydrogel and wrap it around the outside of the sustained-release coating layer to form a fast-release atomizing agent layer, and obtain the whole particle as the atomizing agent core.
[0023] Step 4: Coat the outside of the atomizing agent core with the aroma-enhancing substance to form an aroma-enhancing layer;
[0024] Step 5: Wrap the tobacco material around the aroma layer to form a tobacco layer, and the final whole particle is the heated cigarette core.
[0025] Preferably, in step 1, the raw materials including the first atomizing agent, the first cross-linked network structure material and water are mixed and then subjected to high-pressure homogenization. The high-speed shearing action under high pressure causes the atomizing agent and the first cross-linked network structure material to cross-link and form a three-dimensional network cross-linked structure, that is, to form the atomizing agent hydrogel core.
[0026] Step 2: Wrap a membrane material that is prone to forming pores when heated around the outer layer of the atomizing hydrogel core to form a sustained-release coating layer;
[0027] Step 3: Mix the raw materials including the second atomizing agent, the second cross-linked network structure material and water, and then perform high-pressure homogenization. Use the high-speed shearing action under high pressure to form a hydrogel and wrap it around the outside of the slow-release coating layer to form a fast-release atomizing agent layer, and obtain the whole particle as the atomizing agent core.
[0028] Step 4: Coat the outside of the atomizing agent core with the aroma-enhancing substance to form an aroma-enhancing layer;
[0029] Step 5: Wrap the tobacco material around the aroma layer to form a tobacco layer, and the final whole particle is the heated cigarette core.
[0030] Preferably, in step 1, the mass ratio of the first atomizing agent to the first cross-linked network structure material is 1-15. The amount of water used is 0.1% to 5% of the first cross-linked network structure material.
[0031] Preferably, in step 2, the mass ratio of the sustained-release coating to the atomizing hydrogel core is 0.02-0.1.
[0032] Preferably, in step 3, the mass ratio of the immediate-release atomizing agent gel layer to the atomizing agent hydrogel core is 0.05-0.1. The mass ratio of the second atomizing agent to the second cross-linked network structure material is 1-30. The amount of water used is 0.1%-5% of the second cross-linked network structure material.
[0033] Preferably, in step 4, the aroma-enhancing layer accounts for 10%-30% of the total mass fraction of the heated cigarette core.
[0034] Preferably, in step 5, the tobacco layer accounts for 10%-20% of the total mass fraction of the heated cigarette core.
[0035] The above-mentioned packaging methods can include spraying or rolling.
[0036] Preferably, the amount of the first atomizing agent is greater than that of the second atomizing agent.
[0037] Preferably, the aroma-producing substance may include tobacco substances, tobacco coating liquids, and / or extracts.
[0038] Preferably, the tobacco substance is tobacco powder with a particle size ranging from 20 mesh to 400 mesh.
[0039] Preferably, the extract includes, but is not limited to, one or more herbal plant extracts such as tobacco, cocoa, and chicory.
[0040] Preferably, the particle size of the heated cigarette core is typically in the range of 0.3mm-5mm. Of course, larger particle size heated cigarette cores can also be manufactured for single or multiple use in heated cigarettes.
[0041] The third aspect of this application provides the use of the heated cigarette core described in the first aspect for improving the consistency of the volatilization of atomizing agents, aroma substances and tobacco substances in the heated cigarette core.
[0042] Preferably, the amount of smoke released per puff of heated cigarette is controlled by adjusting the atomizer content of the atomizer core and / or the quick-release atomizer gel layer.
[0043] Compared with the prior art, the present invention has the following beneficial effects:
[0044] 1. In the tobacco core material of this application, the atomizing agent, aroma substances, and tobacco substances are arranged from the inside out in order of increasing volatility. This way, since heat is transferred from the outside to the inside when the tobacco core material is heated, the tobacco substances, which are the least volatile on the outside, can undergo pyrolysis and volatilization almost simultaneously with the less volatile aroma substances and the most volatile atomizing agent, thus improving the consistency of the volatilization of the atomizing agent, aroma substances, and tobacco substances upon heating.
[0045] 2. In the preferred embodiment, the atomizing agent hydrogel core is a hydrogel containing a first atomizing agent and a first cross-linked network structure material. This can solve the problem of difficulty in fixing the shape of liquid atomizing agents, ensuring that the atomizing agent can be well retained in the atomizing agent core.
[0046] 3. In the preferred embodiment, the atomizer core is surrounded by a sustained-release coating layer. The sustained-release layer is used to regulate the smoke release rate and the stable release amount per puff, reducing the sensory impact caused by the gradual decrease in smoke release amount per puff.
[0047] Inside the hydrogel core of the atomizing agent, the atomizing agent is embedded within the interpenetrating network structure of the first cross-linked network material. The surface of the first cross-linked network material contains numerous hydroxyl groups, which form strong intermolecular forces such as numerous hydrogen bonds with the atomizing agent, firmly locking the atomizing agent within the first cross-linked network material structure. When the atomizing agent particles are heated, the sustained-release coating layer surrounding the hydrogel core deforms, forming pore channels. The hydrogen bonds between the atomizing agent inside the sustained-release coating layer and the first cross-linked network material structure break upon heating, absorbing energy and gradually releasing the atomizing agent through the pores. This application can also control the porosity of the first cross-linked network material and the number of heated pores in the sustained-release coating layer by adjusting the amount of the first cross-linked network material and the loose skeleton material, thereby controlling the stable release of the atomizing agent and achieving stable overall flue gas release.
[0048] 4. In a preferred embodiment, the atomizing agent core further includes: a fast-release atomizing agent layer located around the sustained-release coating layer. This fast-release atomizing agent layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material. The surface of the second cross-linked network structure material contains a large number of hydroxyl groups. These hydroxyl groups can form numerous hydrogen bonds with atomizing agent molecules, thereby reducing the internal interaction forces within the atomizing agent molecules and transforming large molecular clusters into smaller ones. This reduces the formation of large molecular clusters in the atomizing agent, ensuring that the atomizing agent molecules are predominantly small clusters, which facilitates thermal release. Furthermore, the fast-release atomizing agent gel layer, being heated externally first, can increase the initial release of heated flue gas. Thus, by regulating the fast and sustained release of the smoke-generating agent, aroma-producing substances, and atomizing agent, stable aerosol release can be achieved. Attached Figure Description
[0049] Figure 1 This is a schematic diagram of the cigarette structure in Example 1.
[0050] Figure 2 This is a schematic diagram of the core particle structure of the heated cigarette in Example 1.
[0051] Figure 3This is a photograph of the hydrogel formed in Example 1 using a homogenizer with glycerol as the first atomizing agent, cellulose nanofibers (CNF) as the first cross-linked network structure material, and water.
[0052] Figure 4 This is a schematic diagram of the hydrogel network structure of the sustained-release atomizing agent gel layer of the atomizing agent hydrogel core particles in Example 1, which forms pores when heated.
[0053] Figure 5 This is a comparison chart of the amount of smoke released per puff from the cigarette prepared in Example 1 and existing heated cigarettes.
[0054] Figure 6 The image shows a comparison of the smoke release from the cigarette prepared in Example 1 and the cigarettes prepared in Comparative Examples 1-3, showing a puff-by-puff release pattern.
[0055] 1. Atomizing agent hydrogel core particles, 2. Flavoring layer, 3. Tobacco layer. Detailed Implementation
[0056] The present invention will be described below with reference to specific embodiments, but the implementation of the present invention is not limited thereto. Experimental methods not specifically described in the embodiments generally use conventional conditions and conditions described in the manual, or conditions recommended by the manufacturer. The general equipment, materials, reagents, etc., used are all commercially available unless otherwise specified. The raw materials required in the following embodiments and comparative examples can all be obtained from cigarette factories.
[0057] Example 1
[0058] A method for preparing a heated cigarette core includes the following steps:
[0059] 1. Preparation of the atomizing agent hydrogel core: The first atomizing agent glycerol, the first cross-linked network structure material cellulose nanofibers CNF (diameter 20nm, length 400nm) and water are mixed at a mass ratio of 3:1:0.01. The mixture is then subjected to low-temperature and high-pressure treatment at a pressure of 100MPa and a temperature of 5℃ using a homogenizer to generate a hydrogel, which serves as the atomizing agent hydrogel core particles.
[0060] 2. A sustained-release coating is wrapped around the inner core of the atomizing hydrogel:
[0061] The sustained-release coating material is ethyl cellulose (25 nm in diameter and 600 nm in length). The method is as follows: ethyl cellulose, accounting for 3% of the mass of the atomizing hydrogel core, is wrapped around the outer layer of the atomizing hydrogel core using a spheroidizing machine to form atomizing hydrogel core particles coated with a sustained-release coating.
[0062] 3. Wrap a fast-release atomizing agent layer around the sustained-release coating layer:
[0063] The immediate-release atomizing agent layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material. Hydroxypropyl cellulose (30 nm in diameter and 800 nm in length) is selected as the second cross-linked network structure material, and the mass of the immediate-release atomizing agent layer accounts for 5% of the mass of the atomizing agent hydrogel core particles. The second atomizing agent glycerol, hydroxypropyl cellulose, and water are mixed in a mass ratio of 10:2:0.05 using a high-speed disperser (speed 2000 r / min) to form a hydrogel. The hydrogel is then used to coat the outside of the sustained-release coating layer using a spheronizer to form the immediate-release atomizing agent layer, thereby obtaining the integral particles as the atomizing agent core.
[0064] 4. Coat the outside of the atomizing agent core with an aroma-enhancing layer. The specific method is as follows: Place the atomizing agent core in a fluidized bed, and then use a peristaltic pump to slowly introduce a tobacco extract concentrate, accounting for 15% of the total mass of the tobacco core particles, as the aroma-enhancing substance concentrate into the fluidized bed to complete the coating. The fluidized bed temperature is 50℃, and the drying time is 5 minutes.
[0065] 5. Wrap a tobacco layer around the aroma layer. The specific method is as follows: put the fluidized bed coated particles into a rounding machine covered with 200 mesh tobacco powder for tobacco powder embedding. By controlling the rounding machine speed (15 r / min) and the rounding time (3 min), heated cigarette core particles with a particle size of 2 ± 0.2 mm are obtained.
[0066] Heating the cigarette core particles and filling them into a complete cigarette is then used to form the cigarette.
[0067] Example 2
[0068] 1. Preparation of the atomizing agent hydrogel core: The first atomizing agent propylene glycol, the first cross-linked network structure material CNC (length 20nm) and water are mixed at a mass ratio of 5:3:0.02. The mixture is then subjected to low-temperature and high-pressure treatment at a pressure of 100MPa and a temperature of 5℃ using a homogenizer to generate a hydrogel, which serves as the atomizing agent hydrogel core particle.
[0069] 2. A sustained-release coating is wrapped around the inner core of the atomizing hydrogel:
[0070] The sustained-release coating material is cationic guar gum (80 mesh). The method is as follows: 2% of the mass of the atomizing hydrogel core is coated with cationic guar gum using a spheroidizing machine to form atomizing hydrogel core particles coated with a sustained-release coating.
[0071] 3. Wrap a fast-release atomizing agent layer around the sustained-release coating layer:
[0072] The immediate-release atomizing agent layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material. Sodium carboxymethyl cellulose (30 nm in diameter and 800 nm in length) is selected as the second cross-linked network structure material, and the mass of the immediate-release atomizing agent layer accounts for 6% of the mass of the atomizing agent hydrogel core particles. The second atomizing agent glycerol, sodium carboxymethyl cellulose, and water are mixed in a mass ratio of 15:5:0.03 using a high-speed disperser (2000 r / min) to form a hydrogel. The hydrogel is then used to coat the outside of the sustained-release coating layer using a spheronizer to form the immediate-release atomizing agent layer, thereby obtaining the integral particles as the atomizing agent core.
[0073] 4. Coat the outside of the atomizing agent core with an aroma-enhancing layer. The specific method is as follows: Place the atomizing agent core in a fluidized bed, and then use a peristaltic pump to slowly introduce a tobacco extract concentrate, accounting for 20% of the total mass of the tobacco core particles, as the aroma-enhancing substance concentrate into the fluidized bed to complete the coating. The fluidized bed temperature is 70℃, and the drying time is 5 minutes.
[0074] 5. Tobacco layer is wrapped around the aroma layer. The specific method is as follows: The fluidized bed coated particles are placed in a rounding machine covered with 150 mesh tobacco powder for tobacco powder embedding. By controlling the rounding machine speed (10 r / min) and the rounding time (3 min), heated cigarette core particles with a particle size of 3 ± 0.2 mm are obtained.
[0075] Heating the cigarette core particles and filling them into a complete cigarette is then used to form the cigarette.
[0076] Example 3
[0077] 1. Preparation of the atomizing agent hydrogel core: The first atomizing agent propylene glycol, the first cross-linked network structure material MCC (diameter range of 50nm, length of 5um) and water are mixed at a mass ratio of 10:6:0.06. The mixture is then subjected to low-temperature and high-pressure treatment at a pressure of 100MPa and a temperature of 5℃ using a homogenizer to generate a hydrogel, which serves as the atomizing agent hydrogel core particle.
[0078] 2. A sustained-release coating is wrapped around the inner core of the atomizing hydrogel:
[0079] The sustained-release coating material is polyacrylic acid (60 mesh). The method is as follows: 1.5% of the mass of the atomizing hydrogel core is coated with polyacrylic acid using a sprayer to form atomizing hydrogel core particles coated with a sustained-release coating.
[0080] 3. Wrap a fast-release atomizing agent layer around the sustained-release coating layer:
[0081] The immediate-release atomizing agent layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material. Methylcellulose (20 nm in diameter and 600 nm in length) is selected as the second cross-linked network structure material, and the mass of the immediate-release atomizing agent layer accounts for 10% of the mass of the atomizing agent hydrogel core particles. The second atomizing agent glycerol, methylcellulose, and water are mixed at a mass ratio of 10:3:0.01 using a high-speed disperser (2000 r / min) to form a hydrogel. The hydrogel is then used to coat the sustained-release coating layer using a spheroidizing machine to form the immediate-release atomizing agent layer, thus obtaining the integral particles as the atomizing agent core.
[0082] 4. Coating the atomizing agent core with an aroma-enhancing layer: The specific method is as follows: Place the atomizing agent core in a fluidized bed, and then use a peristaltic pump to slowly introduce a tobacco extract concentrate (18% of the total mass of the tobacco core particles) as the aroma-enhancing substance concentrate into the fluidized bed to complete the coating. The fluidized bed temperature is 65℃, and the drying time is 6 minutes.
[0083] 5. Tobacco layer is wrapped around the aroma layer. The specific method is as follows: The particles after fluidized bed coating are placed in a rounding machine covered with 300 mesh tobacco powder for tobacco powder embedding. By controlling the speed of the rounding machine (15 r / min) and the rounding time of 3 min, heated cigarette core particles with a particle size of 1.5 ± 0.2 mm are obtained.
[0084] Heating the cigarette core particles and filling them into a complete cigarette is then used to form the cigarette.
[0085] Comparative Example 1
[0086] The only difference from Example 1 is that the atomizing hydrogel core is not coated with a subsequent sustained-release coating layer and a fast-release atomizing agent layer. Instead, the atomizing hydrogel core is used directly as the atomizing agent core, and the aroma layer and tobacco layer are wrapped on the outside.
[0087] The obtained heated cigarette core particles were used to fill cigarettes in the manner described in Example 1 to form comparative cigarette sample 1.
[0088] Comparative Example 2
[0089] The only difference from Example 1 is that only the slow-release coating layer is wrapped around the hydrogel core of the atomizing agent, and the fast-release atomizing agent layer is no longer wrapped. Then, an aroma layer and a tobacco layer are wrapped around the outside of the slow-release coating layer.
[0090] The heated cigarette core particles were used to fill the cigarettes in the manner described in Example 1 to form a comparative cigarette sample 2.
[0091] Comparative Example 3
[0092] The difference from Example 1 is that only the immediate-release atomizing agent layer is directly wrapped around the atomizing agent hydrogel core, without wrapping it with a sustained-release coating layer. Then, an aroma layer and a tobacco layer are wrapped around the outside of the immediate-release atomizing agent layer.
[0093] The heated cigarette core particles were used to fill the cigarettes in the manner described in Example 1 to form a comparative cigarette sample 3.
[0094] Aspiration test 1:
[0095] The cigarette from Example 1 was subjected to a Canadian Deep Cigarette Inhalation (HCI) experiment alongside commercially available IQOS heated cigarettes, with the cigarettes being heated and inhaled. The experimental results are shown below. Figure 5 In the figure, "existing heated cigarettes" refers to IQOS heated cigarettes, and "controlled self-assembly raw materials" refers to the cigarette shown in Example 1. The results show that the cigarette in Example 1 has better smoke release and puff-by-puff stability in the early heating stage compared to existing heated cigarettes. Puff-by-puff smoke capture revealed that the maximum and minimum puff release values of existing heated cigarettes on the market differ by 0.83 mg, while the difference in Example 1 is only 0.39 mg. The variance of smoke release in the first 7 puffs of heated cigarettes on the market is 0.026, while the variance of smoke release in the first 7 puffs of Example 1 is 0.00274, indicating that the puff-by-puff release of Example 1 is closely clustered around the average value, with a more consistent data distribution, further demonstrating that Example 1 has better puff-by-puff stability in smoke release.
[0096] Aspiration test 2:
[0097] The cigarettes from Example 1 were subjected to a Canadian Deep Cigarette Inhalation (HCI) experiment together with control cigarette samples 1-3, and heated for inhalation.
[0098] The results are as follows Figure 6 As shown:
[0099] Example 1 was compared with Comparative Example 1 to show that without the addition of immediate-release and sustained-release layers, the atomizer hydrogel core alone cannot guarantee the stable release of the atomizer carrying the smoke.
[0100] Example 1 is compared with Comparative Example 2 to show that when only the slow-release layer is present, the amount of flue gas released in the first two puffs is less than that in the subsequent puffs, and the slow-release layer plays a role in stabilizing the release in the subsequent puffs.
[0101] Example 1 was compared with Comparative Example 3, and it was found that adding an immediate-release layer helped to ensure the initial release of flue gas. However, since no slow-release layer was added, the release of flue gas showed a phenomenon of first increasing and then decreasing.
[0102] Based on the combined findings of Example 1 and Comparative Examples 1-3, it was found that only a combination of immediate and sustained release can regulate the stable release of flue gas.
Claims
1. A method for preparing heated cigarette core, characterized in that, Includes the following steps: 1) Preparation of the atomizing agent hydrogel core: The first atomizing agent glycerol, the first cross-linked network structure material cellulose nanofibers and water are mixed in a mass ratio of 3:1:0.
01. The mixture is then subjected to low-temperature and high-pressure treatment at a pressure of 100 MPa and a temperature of 5 °C using a homogenizer to generate a hydrogel, which serves as the atomizing agent hydrogel core particles. 2) A sustained-release coating is wrapped around the inner core of the atomizing hydrogel: The sustained-release coating material is ethyl cellulose. Ethyl cellulose, which accounts for 3% of the mass of the atomizing hydrogel core, is wrapped around the outer layer of the atomizing hydrogel core particles using a spheroidizing machine to form atomizing hydrogel core particles wrapped with a sustained-release coating. 3) Wrap a fast-release atomizing agent layer around the sustained-release coating layer: The immediate-release atomizing agent layer is a hydrogel containing a second atomizing agent and a second cross-linked network structure material; hydroxypropyl cellulose is selected as the second cross-linked network structure material, and the mass of the immediate-release atomizing agent layer accounts for 5% of the mass of the atomizing agent hydrogel core particles; the second atomizing agent glycerol, hydroxypropyl cellulose and water are mixed with water at a mass ratio of 10:2:0.05 using a high-speed disperser to form a hydrogel, and the hydrogel is wrapped around the outside of the sustained-release coating layer using a spheroidizing machine to form the immediate-release atomizing agent layer, thereby obtaining the integral particles as the atomizing agent core; 4) Coating the outside of the atomizing agent core with an aroma-enhancing layer: The atomizing agent core is placed in a fluidized bed, and then a peristaltic pump is used to slowly introduce a tobacco extract concentrate, accounting for 15% of the total mass of the tobacco core particles, as an aroma-enhancing substance concentrate into the fluidized bed to complete the coating; the fluidized bed temperature is 50℃, and the drying time is 5 minutes. 5) Wrap a tobacco layer around the aroma layer. Specifically, the fluidized bed coated particles are placed in a rounding machine covered with 200-mesh tobacco powder for tobacco powder embedding. By controlling the rounding machine speed at 15 r / min and the rounding time at 3 min, heated cigarette core particles with a particle size of 2±0.2 mm are obtained.