A heating cigarette sheet with high thermal conductivity and high perfume stability and a preparation method thereof

Abstract

The application provides a heating cigarette sheet with high thermal conductivity and high flavor stability and a preparation method thereof, and the preparation raw materials comprise a flavor, a porous material and tobacco powder; the mass ratio of the flavor and the porous material is (1:1) to (5:1); and the porous material is selected from expanded graphite and / or silicon carbide. By adopting the specific type of porous material as the adsorption material, the application adsorbs the flavor into the inside of the porous material, improves the thermal conductivity of the heating cigarette material sheet, improves the thermal stability of the flavor, and reduces the loss amount of the flavor; the porous characteristics of the material enable the flavor to be fully released during heating, and guarantee the sensory quality of the heating cigarette. Experimental results show that the thermal conductivity coefficient of the sheet is 0.2162 W / (m*K) to 0.2397 W / (m*K); the loss rate of D-limonene is reduced by 52.92% to 60.28%, and the loss rate of linalool is reduced by 38.97% to 46.51%.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heated cigarettes, and particularly relates to a high-thermal-conductivity and high-flavor-stability heated cigarette sheet and a preparation method thereof. BACKGROUND

[0002] In recent years, with the continuous strengthening of international tobacco control and the improvement of people's health awareness, the market of new tobacco products has rapidly grown. Compared with traditional tobacco, new tobacco products are healthier, more convenient and more fashionable. Heated but not combusted cigarettes (hereinafter abbreviated as HnB cigarettes) are a kind of new tobacco products. They heat different forms of tobacco cores such as cigarette tobacco, tobacco sheet or tobacco extract through a heating source without combustion, so as to release flavor substances and nicotine in tobacco leaves to meet the needs of smokers, avoid the release of tar and harmful gases due to tobacco combustion, and greatly reduce the harm of secondhand smoke, which is loved by consumers. On the other hand, due to the product attribute of heating rather than combustion, the flavor substances and other important smoke components released by HnB cigarettes are reduced, which affects the smoking satisfaction of consumers. In order to improve this shortcoming, it is necessary to supplement flavors to HnB cigarettes, and adding flavoring agents to the tobacco segment of HnB cigarettes is an important way.

[0003] Directly adding flavoring agents to the preparation process of HnB reconstituted tobacco leaves has the following problems: (1) flavoring agents are volatile substances, and the loss rate of flavoring agents is high during the drying process, which greatly increases the production cost; (2) part of the flavoring agents are oily substances, and the remaining components in the liquid material are aqueous substances, which have poor compatibility, causing uneven distribution of flavoring agents in the liquid material, and adversely affecting the quality stability of the product. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a high-thermal-conductivity and high-flavor-stability heated cigarette sheet and a preparation method thereof, which has good thermal conductivity and reduces the loss of flavoring agents.

[0005] The present application provides a high-thermal-conductivity and high-flavor-stability heated cigarette sheet, and the preparation raw materials include flavoring agents, porous materials and tobacco powder.

[0006] The mass ratio of the flavoring agents to the porous materials is (1:1) to (5:1).

[0007] The porous materials are selected from expanded graphite and / or silicon carbide.

[0008] Preferably, the porosity of the porous materials is 50% to 95%.

[0009] Preferably, the thermal conductivity of the porous materials is higher than 150 W / (m·K).

[0010] Preferably, the porous material is selected from expanded graphite with porosity 85%, thermal conductivity 220 W / (m·K); or silicon carbide with porosity 80%, thermal conductivity 220 W / (m·K).

[0011] Preferably, the mass ratio of the perfume and the porous material is 3:1; or 4:1.

[0012] Preferably, the perfume is selected from sweet orange essence and / or blueberry essence.

[0013] Preferably, the preparation raw material further comprises 1%-5% of carboxymethyl cellulose, 1%-5% of xanthan gum, 1%-5% of sodium alginate, 1%-15% of wood pulp fiber, 10%-30% of glycerol, and 5%-20% of propylene glycol, based on the mass of the tobacco powder.

[0014] The present application provides a preparation method of the heating cigarette sheet with high thermal conductivity and high perfume stability, comprising the following steps:

[0015] Mixing the perfume and the porous material to obtain a composite material;

[0016] Mixing the composite material and the tobacco powder to obtain the heating cigarette sheet.

[0017] The present application provides a heating cigarette sheet with high thermal conductivity and high perfume stability, and the preparation raw material comprises perfume, porous material and tobacco powder; the mass ratio of the perfume and the porous material is (1:1)-(5:1); and the porous material is selected from expanded graphite and / or silicon carbide. DETAILED DESCRIPTION

[0018] The present application provides a heating cigarette sheet with high thermal conductivity and high perfume stability, and the preparation raw material comprises perfume, porous material and tobacco powder;

[0019] The mass ratio of the perfume and the porous material is (1:1)-(5:1);

[0020] The porous material is selected from expanded graphite and / or silicon carbide.

[0021] The porous material can adsorb the flavor in the inside, reduces the loss of the flavor, reduces the adding amount of the flavor, and reduces the production cost; due to the pore structure characteristics of the porous material, the flavor can be stably released in the heating process, and the sensory quality of the heated cigarette is ensured; the expanded graphite and / or silicon carbide also serve as the sustained-release material and have the heat conductivity, which can effectively improve the heat conduction performance of the heated cigarette and optimize the uniformity of the flavor release.

[0022] The preparation raw material of the heated cigarette sheet provided by the present application comprises flavorings such as sweet orange essence and blueberry essence; the present application does not have special restrictions on the types of flavorings, and any flavoring commonly used in heated cigarettes can be used.

[0023] The preparation raw material of the heated cigarette sheet provided by the present application comprises a porous material; the porous material is selected from expanded graphite and / or silicon carbide. The porosity of the porous material is 50-95%. The thermal conductivity coefficient of the porous material is higher than 150 W / (m·K). In specific embodiments, the porous material is selected from expanded graphite with a porosity of 85% and a thermal conductivity coefficient of 220 W / (m·K); or silicon carbide with a porosity of 80% and a thermal conductivity coefficient of 220 W / (m·K).

[0024] The preparation raw material of the heated cigarette sheet provided by the present application comprises tobacco powder; the particle size of the tobacco powder is 200-500 mesh; the present application does not have special restrictions on the types of tobacco powder, and any tobacco powder commonly used by those skilled in the art can be used.

[0025] In the present application, the mass ratio of the flavoring and the porous material is 3:1; or 4:1.

[0026] The present application provides a preparation method of the heated cigarette sheet with high thermal conductivity and high flavor stability as described in the above technical solutions, which comprises the following steps:

[0027] Mixing the flavoring and the porous material to obtain a composite material;

[0028] Mixing the composite material and the tobacco powder to obtain the heated cigarette sheet.

[0029] The present application mixes the flavoring and the porous material to obtain a composite material. The composite material has good dispersing performance.

[0030] In the present application, the mixing temperature of the flavoring and the porous material is 20-50 DEG C. The mixing temperature of the composite material and the tobacco powder is 15-45 DEG C.

[0031] The mass ratio of the flavor and the porous material in the present application is (1:1)~(5:1). The mass ratio of the composite material and the tobacco powder in the present application is (1:10)~(1:40); in specific embodiments, the mass ratio of the composite material and the tobacco powder is 1:20, or 1:10, 1:30.

[0032] The above composite material is mixed with tobacco powder, and then mixed with carboxymethyl cellulose (1%-5%, based on the mass of the tobacco powder, the same below), xanthan gum (1%-5%), sodium alginate (1%-5%), wood pulp fiber (1%-15%), glycerol (10%-30%), and propylene glycol (5%-20%) to prepare a heating cigarette sheet with a thickness of 0.15~0.30mm. The sheet is tested for thermal conductivity by the transient plane heat source method.

[0033] In specific embodiments, the composite material is mixed with tobacco powder, and then mixed with 1.5% carboxymethyl cellulose, 2% xanthan gum, 1% sodium alginate, 3% wood pulp fiber, 15% glycerol, and 6% propylene glycol;

[0034] or the composite material is mixed with tobacco powder, and then mixed with 2.5% carboxymethyl cellulose, 1.5% xanthan gum, 1.5% sodium alginate, 15% wood pulp fiber, 20% glycerol, and 15% propylene glycol;

[0035] or the composite material is mixed with tobacco powder, and then mixed with 5% carboxymethyl cellulose, 1% xanthan gum, 3% sodium alginate, 5% wood pulp fiber, 30% glycerol, and 10% propylene glycol.

[0036] To further illustrate the present application, a high-thermal-conductivity, high-flavor-stability heating cigarette sheet and a preparation method thereof provided by the present application are described in detail below in conjunction with examples, but they should not be understood as limiting the scope of protection of the present application.

[0037] Example 1

[0038] Sweet orange flavor is mixed with expanded graphite with a porosity of 85% and a thermal conductivity of 220W / (m·K) at 30℃ according to a mass ratio of 4:1 to obtain a composite material;

[0039] The composite material is uniformly dispersed in heating cigarette powder at a mass ratio of 1:20, and then mixed with 1.5% carboxymethyl cellulose, 2% xanthan gum, 1% sodium alginate, 3% wood pulp fiber, 15% glycerol, and 6% propylene glycol to prepare a heating cigarette sheet with a thickness of 0.16mm.

[0040] The thermal conductivity of the prepared tobacco sheet is improved from 0.1253 W / (m·K) to 0.2397 W / (m·K). According to the GC-MS detection, after the sheet is dried at 120℃ for 60 minutes, the loss rate of characteristic component D-limonene in the flavor is reduced by 60.28%, and the loss rate of linalool is reduced by 46.51%.

[0041] Example 2

[0042] The sweet orange flavor is mixed with silicon carbide with a porosity of 80% and a thermal conductivity of 200 W / (m·K) at 40℃, and the mass ratio is 3:1 to obtain a composite material;

[0043] The composite material is uniformly dispersed in the heated cigarette powder at a mass ratio of 1:30, and then mixed with 2.5% carboxymethyl cellulose, 1.5% xanthan gum, 1.5% sodium alginate, 15% wood pulp fiber, 20% glycerol, and 15% propylene glycol to prepare a heated cigarette sheet with a thickness of 0.20mm.

[0044] The thermal conductivity of the prepared tobacco sheet is improved from 0.1253 W / (m·K) to 0.2162 W / (m·K). According to the GC-MS detection, after the sheet is dried at 120℃ for 60 minutes, the loss rate of characteristic component D-limonene in the flavor is reduced by 52.92%, and the loss rate of linalool is reduced by 38.97%.

[0045] Example 3

[0046] The sweet orange flavor is mixed with silicon carbide with a porosity of 80% and a thermal conductivity of 200 W / (m·K) and expanded graphite with a porosity of 85% and a thermal conductivity of 220 W / (m·K) at a ratio of 1:1, and then mixed at 40℃ with a mass ratio of 3.5:1 to obtain a composite material;

[0047] The composite material is uniformly dispersed in the heated cigarette powder at a mass ratio of 1:10, and then mixed with 5% carboxymethyl cellulose, 1% xanthan gum, 3% sodium alginate, 5% wood pulp fiber, 30% glycerol, and 10% propylene glycol to prepare a heated cigarette sheet with a thickness of 0.18mm.

[0048] The thermal conductivity of the prepared tobacco sheet is improved from 0.1253 W / (m·K) to 0.2262 W / (m·K). According to the GC-MS detection, after the sheet is dried at 120℃ for 60 minutes, the loss rate of characteristic component D-limonene in the flavor is reduced by 55.81%, and the loss rate of linalool is reduced by 42.16%.

[0049] From the above embodiment, the application provides a heating cigarette sheet with high thermal conductivity and high flavor stability, and the preparation raw materials include flavor, porous material and tobacco powder; the mass ratio of the flavor and the porous material is (1:1)~(5:1); and the porous material is selected from expanded graphite and / or silicon carbide. The application uses a specific kind of porous material as an adsorption material to adsorb the flavor into the interior of the porous material, thereby improving the thermal conductivity of the heating cigarette material, improving the thermal stability of the flavor, reducing the loss amount of the flavor, and ensuring the sensory quality of the heating cigarette by fully releasing the flavor during heating due to the porous characteristics of the material. Experimental results show that the thermal conductivity of the sheet is 0.2162 W / (m·K)~0.2397 W / (m·K); the loss rate of D-limonene is reduced by 52.92%~60.28%, and the loss rate of linalool is reduced by 38.97%~46.51%.

[0050] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A heated cigarette sheet with high thermal conductivity and high flavor stability, the raw materials for which are prepared include flavorings, porous materials and tobacco powder; The mass ratio of the fragrance to the porous material is (1:1) to (5:1); The porous material is selected from expanded graphite and / or silicon carbide; The porous material has a porosity of 50-95% and a thermal conductivity higher than 150 W / (m·K). Based on the quality of tobacco powder, the raw materials also include 1%-5% carboxymethyl cellulose, 1%-5% xanthan gum, 1%-5% sodium alginate, 1%-10% wood pulp fiber, 10%-30% glycerol, and 5%-20% propylene glycol; The method for preparing the heated cigarette sheet with high thermal conductivity and high flavor stability includes the following steps: By mixing fragrances and porous materials, a composite material is obtained; Based on the quality of tobacco powder, the composite material is mixed with tobacco powder and then mixed with 1%-5% carboxymethyl cellulose, 1%-5% xanthan gum, 1%-5% sodium alginate, 1%-10% wood pulp fiber, 10%-30% glycerol and 5%-20% propylene glycol to obtain heated cigarette sheets.

2. The heated cigarette sheet according to claim 1, characterized in that, The porous material is selected from expanded graphite with a porosity of 85% and a thermal conductivity of 220 W / (m·K); or silicon carbide with a porosity of 80% and a thermal conductivity of 220 W / (m·K).

3. The heated cigarette sheet according to claim 1, characterized in that, The mass ratio of fragrance to porous material is 3:1 or 4:

1.

4. The heated cigarette sheet according to claim 1, characterized in that, The flavoring is selected from sweet orange essence and / or blueberry essence.

5. A method for preparing a heated cigarette sheet with high thermal conductivity and high flavor stability as described in any one of claims 1 to 4, comprising the following steps: By mixing fragrances and porous materials, a composite material is obtained; Based on the quality of tobacco powder, the composite material is mixed with tobacco powder and then mixed with 1%-5% carboxymethyl cellulose, 1%-5% xanthan gum, 1%-5% sodium alginate, 1%-10% wood pulp fiber, 10%-30% glycerol and 5%-20% propylene glycol to obtain heated cigarette sheets.