High-flux cigarette core material for heating cigarettes as well as preparation method and application of high-flux cigarette core material

Abstract

The invention discloses a high-flux cigarette core material for heating cigarettes as well as a preparation method and application of the high-flux cigarette core material. At least one surface of the cigarette core material is a wave-shaped surface. A functional material is added into the cigarette core material, the functional material is one or more of magnesium citrate tetradecahydrate, magnesium lactate trihydrate, silicon carbide, graphene and a Mg < 2 + > doped ABO3 type perovskite material, and the addition amount of the functional material is 1-10% of the mass of the cigarette core material. According to the corrugated surface cigarette core raw material, through radiation heating or air heat flow heating, the contact area between a heat source and the cigarette core material is increased through the axial channel, the high-flux corrugated surface cigarette core raw material can rapidly reach the uniform temperature, and the temperature hysteresis of the material is relieved. The corrugated surface structure enables the internal gap of the cigarette core material to be enlarged, thereby being beneficial to outward diffusion of various molecules of the cigarette core material to form aerosol.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heated cigarettes, and particularly relates to a high-flux tobacco core material for heated cigarettes and a preparation method and application thereof. BACKGROUND

[0002] With the improvement of people's living quality and the strengthening of tobacco control, new requirements for harm reduction of cigarette products have been put forward, and new tobacco products have emerged as the times require. As one of the important categories of new tobacco, heated cigarettes are heated to 200-400 DEG C to make the tobacco core material undergo distillation and pyrolysis to release nicotine and flavor components to meet the needs of consumers. At the same time, due to heating but not burning, harmful or potentially harmful components in smoke aerosol are significantly reduced, thereby showing the characteristics of harm reduction. In recent years, heated cigarettes have become a field widely concerned by domestic and foreign tobacco companies and tobacco industry researchers.

[0003] However, compared with traditional cigarettes, the existing heating method of heated cigarettes is mainly circumferential and central electric heating. Due to the hysteresis of temperature conduction, the first puff of heated cigarettes releases less smoke than the second to fifth puffs, and then the smoke decays puff by puff, which causes the phenomenon that the release of smoke aerosol is unstable puff by puff. In addition, due to the addition of flavor components and the need to improve the level of aroma retention, it is easy to cause insufficient retention of flavor components in the product and insufficient richness of "flavor" and "taste" in the sensory experience of smoking.

[0004] In order to solve the above problems and meet the smoking experience of consumers, the present application is proposed to stably release smoke. SUMMARY

[0005] The present application aims to provide a high-flux tobacco core material for heated cigarettes and a preparation method and application thereof. By adjusting the curvature of the tobacco core sheet to adjust the gap size of the axial channel, the contact area between the heat source of auxiliary heating or air heating and the tobacco core material is increased, so that the tobacco core material is quickly and uniformly heated, the temperature hysteresis effect of the material is weakened, and then the smoke aerosol outlet smoke volume is increased to achieve the purpose of stable and uniform release.

[0006] The purpose of the present application can be achieved by the following technical solutions: A high-flux tobacco core material for heated cigarettes, at least one side of the tobacco core material is a wave-shaped surface.

[0007] Further, both sides of the tobacco core material are wave-shaped surfaces.

[0008] Further, the wave shape of the wave-shaped surface is a sine wave, a triangular wave, or a tuned wave between the two.

[0009] Further, when the wave-shaped surface is a sine wave, the wave-shaped surface is provided with a support sheet at the bottom.

[0010] Further, the tobacco core material and the support are all thick slurry tobacco sheet, papermaking composite tobacco sheet and cut tobacco.

[0011] Further, the amplitude of the wave surface is 0.4-10 mm, the distance between the highest points of the wave surface ranges from 1 to 10 mm, the number of wave surfaces contained in the tobacco core material per 1 cm length is 2-20, and the thickness of the tobacco core material is 90-200 μm.

[0012] The preparation method of the high-flux tobacco core material for the heated cigarette, the tobacco core material is processed into the tobacco core material with the wave surface by the curved roller or the tooth-shaped cutter.

[0013] Further, when the curved roller is used, the curved roller is connected to the front part of the last drying section of the thick slurry tobacco sheet and the papermaking composite tobacco sheet or the rear part of the loose and humidified end of the cut tobacco, and the tobacco sheet with a humidity of 15-20% is pressed by the curved roller to form the tobacco sheet with the wave surface; when the tooth-shaped cutter is used, the tooth-shaped cutter is installed at the tobacco sheet cutting end.

[0014] Further, the functional material is added to the tobacco core material, and the functional material is magnesium citrate tetradecahydrate, magnesium lactate trihydrate, silicon carbide, graphene, Mg 2+ The functional material is doped with one or more ABO3 type perovskite materials, and the addition amount of the functional material is 1-10% of the mass of the tobacco core material.

[0015] The wave surface tobacco core material or the support with the wave surface tobacco core material is filled into the cigarette paper as the core material of the cigarette by the concentric circle rolling or cutting into small pieces, so as to form a plurality of airflow channels in the cigarette.

[0016] Further, the tobacco core material in the cigarette is rapidly heated to a target temperature by radiation or radiation and hot air, the near-infrared wave with a wavelength of 0.76-6 μm and a frequency of 12-400 THz is used for the radiation heating, and the hot air source is a hot air generating device. The heating rate can be controlled at 50-1000 ℃ / s.

[0017] Compared with the prior art, the present application has the following beneficial effects: 1. The wave surface tobacco core raw material is heated by radiation or air flow, the contact area between the heat source and the tobacco core material is increased by the axial channel, the high-flux wave surface tobacco core raw material can be rapidly and uniformly heated, and the temperature hysteresis of the material is reduced.

[0018] 2. The wave surface structure increases the internal void of the tobacco core material, which is beneficial to the external diffusion of various molecules in the tobacco core material to form aerosol.

[0019] 3. The corrugated surface structure is conducive to the formation of local vortex of aerosol inside the tobacco core material, increases the residence time of small molecule substances inside the tobacco core, and further promotes the full fusion of components of the smoke aerosol, thereby improving the consistency and richness of the smoke.

[0020] 4. The content of the wave-absorbing particles in the tobacco sheet and the size of the corrugated surface can be adjusted to control the infrared absorption efficiency of the material at a specific wavelength, and by matching the wavelength of the radiation source with the absorption peak of the heated object, efficient heating can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of the existing heating cigarette structure and a structural schematic diagram; Figure 2 is a sectional view of the axial channel tobacco core material with different pore sizes; Figure 3 is a structural schematic diagram of a high-flux axial channel tobacco core material without support; Figure 4 is a structural schematic diagram of a high-flux axial channel tobacco core material with support; Figure 5 is a schematic diagram of the curvature of the curved roller; Figure 6 is a schematic diagram of the toothed tobacco sheet; Figure 7 is a schematic diagram of the temperature sampling points of Example 1; Figure 8 is a graph of the test results of the puff-by-puff smoke volume of Cigarettes A and B. DETAILED DESCRIPTION

[0022] Example 1 A high-flux tobacco core material for a heating cigarette, both surfaces of the tobacco core material are corrugated surfaces, as shown in Figures 2 to 6 , the wave shape of the corrugated surface is a sine wave, a triangular wave, or a tuned wave between the two. When the corrugated surface is a sine wave, a support sheet is provided at the bottom of the corrugated surface. The tobacco core material and the support sheet are thick slurry tobacco sheets, papermaking composite tobacco sheets, and sheet tobacco.

[0023] The amplitude of the corrugated surface is 0.4-10 mm, the distance between the highest points of the corrugated surface ranges from 1 to 10 mm, the number of corrugated surfaces contained in the tobacco core material per 1 cm length is 2-20, and the thickness of the tobacco core material is 90-200 μm.

[0024] The preparation process of the above-mentioned high-flux tobacco core material for a heating cigarette is as follows: A curved roller is installed at the front of the last drying section of the existing thick slurry or papermaking composite tobacco sheet, as shown in Figure 5As shown, the speed of the curved roller is adjusted, the tobacco sheet with humidity of 15-20% after the previous drying section is passed through the curved roller, and the tobacco sheet is converted into a sheet with a certain wave-shaped surface by the pressure between the upper and lower curved rollers, and then dried through the last drying section to finally produce the tobacco sheet product with a set wave-shaped surface. For cut tobacco, the upper and lower curved rollers are installed at the rear of the loose rehydration end, and the loose cut tobacco is extruded through the curved rollers to become cut tobacco with curvature. For toothed sheet, as shown, Figure 6 To install the toothed cutter at the tobacco sheet cutting end, toothed sheet with different cutting angles is prepared by adjusting the angle of the cutter blade.

[0025] For cigarette loading, the tobacco core material can be small pieces composed of many small pieces, or small pieces composed of wave-shaped sheet and traditional sheet mixed together, or a concentric circle structure of a sheet.

[0026] The preparation process of the cigarette composed of small pieces is as follows: as shown, Figure 3 The wave-shaped tobacco sheet 2 is cut into wave-shaped tobacco strands with a width of 0.5-3 mm and a length of 11-15 mm at both ends, and then 0.25-0.45 g of wave-shaped tobacco strands is loaded into the cigarette paper 1 according to the cigarette specifications (cross-sectional view as shown in Figure 2 a).

[0027] The wave-shaped sheet and the traditional sheet are combined: the traditional sheet with a width of 0.5 mm and a length of 11-15 mm is used as a support sheet 3 and is layered or sequentially filled with a wave-shaped tobacco sheet 2 into a cigarette paper 1 (cross-sectional view as shown in Figure 2 b).

[0028] Concentric circle structure: as shown, Figure 4 The support sheet 3 with a wave-shaped sheet 2 is cut into a sheet with a width of 11-15 mm and a length of 100-150 mm at both ends, and then the sheet is rolled into a concentric circle and loaded into a cigarette tube according to the concentric circle rolling method (cross-sectional view as shown in Figure 2 c).

[0029] The amplitude is 3 mm, the distance between the highest points of the wave-shaped surface (half wavelength) is 2 mm, the number of wave-shaped surfaces contained in the sheet per 1 cm length is 10, graphene is added to the tobacco sheet, the amount of graphene added is 2% of the mass of the tobacco sheet, and the thickness of the tobacco sheet is 120 μm. The wave-shaped tobacco sheet and Figure 1 The existing tobacco sheet with a thickness of 120 μm is loaded into a rectangular sheet with a width of 2 mm and a length of 150 mm to fill a cigarette, and each of the heat-not-burn cigarettes is loaded according to Figure 7Three temperature measuring points were taken at each position. The overall diameter of the tobacco core of the two cigarettes was 7.5 mm, the length was 15 mm, and the weight of the tobacco core was 0.3 g. The temperature changes of the existing cigarette A and the wave surface tobacco core structure B were tested under the condition of bottom radiation heating at a wavelength of 3 μm and a frequency of 100 THz, and the results were as follows: Under the same heating conditions, the overall temperature rising speed of the existing cigarette A at points 1, 2 and 3 was lower than that of the wave surface tobacco core structure B. The test temperature of point 3 of A was 50 ℃ after heating for 1 s, while the test temperature of point 3 of B was 300 ℃ after heating for 1 s. The temperature rising speed of B at point 3 was 6 times that of A. A and B were subjected to smoking test.

[0030] As shown in Figure 8 , the sample A and B were subjected to mouth-by-mouth smoke quantity capture. The maximum capture quantity of sample A was 1.96 mg at the 5th capture, the minimum value was 1.2 mg, the average value was about 1.659 mg, and the variance was about 0.048. The maximum capture quantity of sample A was 2.06 mg at the 5th capture, the minimum value was 1.52 mg, the average value was about 1.878 mg, and the variance was about 0.023. Comparison shows that B is higher than the left column in maximum value, minimum value and average value, and has smaller variance, indicating that sample B has more overall smoke release quantity, smaller mouth-by-mouth release fluctuation and better stability.

[0031] Although the preferred embodiments of the present application have been shown and described, it is to be understood that the described embodiments are only part of the embodiments of the present application, and are not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A high-flux tobacco core material for a heat-not-burn cigarette, characterized by, At least one side of the tobacco core material is a wave-shaped surface.

2. The high-flux core material for heated cigarettes according to claim 1, wherein Both sides of the tobacco core material are wave-shaped surfaces.

3. The high-flux core material for a heated cigarette according to claim 1 or 2, wherein The wave shape of the wave-shaped surface is a sine wave, a triangle wave or a tuning wave between the two.

4. The high-flux core material for a heated cigarette according to claim 1 or 2, wherein The tobacco core material is one of a thick slurry method tobacco sheet, a papermaking composite method tobacco sheet and a cut tobacco.

5. The high-flux core material for a heated cigarette according to claim 4, wherein The amplitude of the wave-shaped surface is 0.4-10 mm, the distance between the highest points of the wave-shaped surface is 1-10 mm, the number of wave-shaped surfaces per 1 cm length of the tobacco core material is 2-20, and the thickness of the tobacco core material is 90-200 μm.

6. The method of claim 1 to 5 for the preparation of a high flux core material for heated cigarettes, characterized in that, The tobacco core material is processed into a tobacco core material with a wave-shaped surface by a curved roller or a toothed cutter.

7. The preparation method according to claim 5, characterized in that, When the curved roller is used, the curved roller is connected to the front of the last drying section of the thick slurry method tobacco sheet and the papermaking composite method tobacco sheet or the rear of the loose re-moistening end of the cut tobacco, and the tobacco sheet with a moisture content of 15-20% is pressed by the curved roller to form a tobacco sheet with a wave-shaped surface; when the toothed cutter is used, the toothed cutter is installed at the tobacco sheet cutting end.

8. The preparation method according to claim 5, characterized in that, The functional material added in the tobacco core material is magnesium citrate tetradecahydrate, magnesium lactate trihydrate, silicon carbide, graphene, Mg 2+ The functional material is one or more of doped ABO3 type perovskite materials, and the added amount of the functional material is 1-10% of the mass of the tobacco core material.

9. Use of the high-flux core material for heated cigarettes according to any one of claims 1 to 5, characterized in that, The tobacco core material with the wave-shaped surface is filled into the cigarette paper as the core material of the cigarette by means of concentric circle rolling or cutting into small pieces to form a plurality of airflow channels in the cigarette.

10. Use according to claim 9, characterized in that, The tobacco core material in the cigarette is rapidly heated to a target temperature by radiation or radiation and hot air, the near-infrared wave with a wavelength of 0.76-6 μm and a frequency of 12-400 THz is used for the radiation heating, and the hot air source is a hot air generating device.

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