A method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method, and its product and application

Abstract

The present invention discloses a method for preparing a heated cigarette sheet by a cryogenic thick slurry method, its product and application. The method comprises: (1) mixing fibers, tobacco leaves, an adhesive and supercritical CO2 to obtain a supercritical tobacco slurry; (2) mixing a surfactant and an atomizing agent to obtain a cryogenic atomizing agent; (3) mixing the supercritical tobacco slurry and the cryogenic atomizing agent to obtain a supercritical thick slurry; (4) spreading the supercritical thick slurry in a mold, and obtaining the heated cigarette sheet after molding. The method of the present invention innovatively optimizes the tobacco slurry by using supercritical CO2 as a solvent, and then combines the surfactant to optimize the atomizing agent, so that the whole process temperature of preparing the heated cigarette sheet by the thick slurry method can be lower than 35°C, and the heating temperature of the final heated cigarette can be reduced to below 150°C, achieving the effects of reducing the release of harmful components in the aerosol of the heated cigarette and improving the sensory quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of heated cigarettes, and in particular relates to a method for preparing heated cigarette sheets by an ultra-low temperature thick slurry method, and a product and application thereof. Background Art

[0002] Heated cigarettes are in the ascendant, and the market size is growing rapidly. The 2022 financial report of Philip Morris, a foreign tobacco giant, shows that nearly one-third of the company's revenue comes from the sales of heated cigarettes, which shows that heated cigarettes that focus on "reducing harm" are very popular among consumers.

[0003] Studies have shown that heated cigarettes reduce at least 80% of harmful ingredients compared to traditional cigarettes. Among the more than 8,000 chemical substances detected in the aerosol of traditional cigarettes, only more than 200 appear in the aerosol of heated cigarettes, and the number and content of potential harmful substances are greatly reduced. The main reason for this phenomenon is that the combustion of traditional cigarettes can reach about 900°C, and the high-temperature decomposition of macromolecular compounds such as proteins, sugars, and cellulose in tobacco produces more harmful ingredients, while heated cigarettes only heat the tobacco to 250-350°C, and the aerosol is mainly produced through the process of baking and distillation, which greatly reduces the generation and release of harmful substances. It can be seen that the lower the heating temperature, the fewer harmful ingredients are released in the aerosol of heated cigarettes.

[0004] CN108477668A provides a low-temperature cigarette processing method and application thereof. On the basis of thick slurry method and roller pressing method of reconstituted tobacco leaf process, ultrasonic microwave synergistic stirring and mixing materials are adopted to make a higher proportion of atomizer evenly dispersed and distributed in the heat-not-burn reconstituted tobacco leaf. At the same time, the adhesion is good, the surface is not sticky, the strength of the reconstituted tobacco leaf is good, the adaptability of the heat-not-burn reconstituted tobacco leaf on the machine is improved, the existing rolling and connecting machine can be rolled and connected normally, the production continuity is good, the production efficiency is high, and a chemical reaction occurs in the heating and drying process to produce porous bubbles inside, increase the internal surface area, make the high content of atomizer more evenly distributed, and the rolled low-temperature cigarette has improved atomization effect, rich tobacco aroma, and good sensory effect.

[0005] CN116264912A discloses a low-temperature heating cigarette, which is composed of a low-temperature filter rod and a low-temperature smoking rod connected together; the low-temperature filter rod includes a hollow fiber bundle straight tube, one end of the hollow fiber bundle straight tube is a sealed end, and small holes are arranged on the tube wall of the hollow fiber bundle straight tube; the low-temperature smoking rod includes a tobacco sheet, the tobacco sheet contains an atomizer, tobacco powder, a heat-conducting material and a low-temperature pore-forming agent, or the tobacco sheet contains an atomizer, tobacco powder and a heat-conducting material, and small holes are punched on the tobacco sheet. The low-temperature heating cigarette can promote the efficient release of the flavor components of the tobacco sheet at a relatively low temperature, effectively improve the tobacco utilization efficiency, and ensure that the strength, aroma volume and aroma richness of the smoke of the low-temperature heating cigarette meet the physiological satisfaction of the smoker.

[0006] However, the boiling point of the above-mentioned heating coil aerosolizing agent is relatively high. Therefore, the heating temperature of the heated cigarette cannot be lowered to a lower temperature, and the release amount of harmful components in the aerosol of the heated cigarette is still a pathogenic factor that cannot be ignored. Summary of the Invention

[0007] In view of the deficiencies of the prior art and the actual needs, the present invention provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method, and its products and applications.

[0008] To achieve the purpose of this invention, the following technical solutions are adopted:

[0009] In the first aspect, the present invention provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method, the method comprising:

[0010] (1) Mixing fibers, tobacco leaves, adhesives and supercritical CO2 to obtain a supercritical state tobacco slurry;

[0011] (2) Mixing a surfactant and an aerosolizing agent to obtain an ultra-low temperature aerosolizing agent;

[0012] (3) Mixing the supercritical state tobacco slurry and the ultra-low temperature aerosolizing agent to obtain a supercritical thick slurry;

[0013] (4) Spreading the supercritical thick slurry on a mold, and obtaining the heated cigarette sheet after molding.

[0014] In the prior art, the combustion temperature of heated cigarettes is generally between 250°C and 350°C. The "ultra-low temperature" in the present invention means that the combustion temperature of the heated cigarette is lower than 150°C.

[0015] The method of the present invention innovatively optimizes the tobacco slurry by using supercritical CO2 as a solvent, and then combines the surfactant to optimize the aerosolizing agent, which can realize that the whole process temperature of preparing the heated cigarette sheet by the thick slurry method is lower than 35°C, and reduce the heating temperature of the final heated cigarette to below 150°C, achieving the effects of reducing the release of harmful components in the aerosol of the heated cigarette and improving the sensory quality.

[0016] Preferably, the mass ratio of the fibers, tobacco leaves, adhesives and supercritical CO2 in step (1) is (2-5):(15-25):(1-3):(3-8).

[0017] Among them, "2-5" can be 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5 or 4.8, etc.;

[0018] "15-25" can be 16, 17, 18, 19, 20, 21, 22, 23 or 24, etc.;

[0019] "1 - 3" can be 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4, 2.6, or 2.8, etc.;

[0020] "3 - 8" can be 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, or 7.5, etc.

[0021] Other specific point values within the above numerical ranges can be selected and will not be elaborated one by one here.

[0022] Preferably, the fiber is wood fiber.

[0023] Preferably, the fiber is pulverized.

[0024] Preferably, the particle size of the pulverized fiber is 30 - 60 mesh.

[0025] Preferably, the tobacco leaves are pulverized.

[0026] Preferably, the particle size of the pulverized tobacco leaves is 30 - 60 mesh.

[0027] Preferably, the adhesive includes guar gum and / or carboxymethyl cellulose.

[0028] Preferably, the adhesive is a combination of guar gum and carboxymethyl cellulose.

[0029] Preferably, the mass ratio of guar gum to carboxymethyl cellulose is 1:(0.5 - 1.5), for example, it can be 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, or 1:1.4, etc.

[0030] Preferably, the mixing in step (1) is carried out in a supercritical container.

[0031] Preferably, the temperature of the supercritical container is set at 30 - 35 °C (for example, it can be 31 °C, 32 °C, 33 °C, or 34 °C, etc.), and the pressure is set at 70 - 75 atm (for example, it can be 71 atm, 72 atm, 73 atm, or 74 atm, etc.).

[0032] Preferably, the mass ratio of the surfactant to the atomizing agent in step (2) is (0.5 - 10):100, for example, it can be 0.8:100, 1:100, 2:100, 3:100, 4:100, 5:100, 6:100, 7:100, 8:100, or 9:100, etc.

[0033] Other specific point values within the above numerical ranges can be selected and will not be elaborated one by one here.

[0034] Preferably, the surfactant includes an anionic surfactant and / or a cationic surfactant.

[0035] Preferably, the surfactant is a combination of an anionic surfactant and a cationic surfactant.

[0036] As a preferred technical solution of the present invention, the surfactant adopts a combination of an anionic surfactant and a cationic surfactant. Furthermore, the characteristics of the anionic and cationic surfactants can be utilized to form an ordered structure at the interface of the thin sheet aerosol agent, with the hydrophilic end facing the aerosol agent interface and the hydrophobic end facing the outside air. When the heated cigarette is smoked, since the main components of the aerosol are the aerosol agent and moisture, the phase of the hydrophilic end and the hydrophobic end changes, thereby promoting the low-temperature release of the aerosol agent, achieving the goal of the heating temperature of the heated cigarette being as low as 150°C, and effectively reducing the release of harmful carbonyl compounds in the aerosol of the heated cigarette.

[0037] Preferably, the anionic surfactant includes stearic acid and / or sodium dodecylbenzenesulfonate.

[0038] Preferably, the anionic surfactant is a combination of stearic acid and sodium dodecylbenzenesulfonate.

[0039] Preferably, the cationic surfactant includes tetra-n-octylammonium bromide and / or dodecyltrimethylammonium chloride.

[0040] Preferably, the cationic surfactant is a combination of tetra-n-octylammonium bromide and dodecyltrimethylammonium chloride.

[0041] Preferably, the surfactant is a combination of stearic acid, sodium dodecylbenzenesulfonate, tetra-n-octylammonium bromide, and dodecyltrimethylammonium chloride.

[0042] Preferably, the mass ratio of stearic acid, sodium dodecylbenzenesulfonate, tetra-n-octylammonium bromide, and dodecyltrimethylammonium chloride is (2 - 6):(0.1 - 1.5):(3 - 5):(0.5 - 2).

[0043] Among them, "2 - 6" can be 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, 5.2, 5.5, or 5.8, etc.;

[0044] "0.1 - 1.5" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, or 1.4, etc.;

[0045] "3 - 5" can be 3.1, 3.3, 3.5, 3.7, 3.9, 4, 4.1, 4.3, 4.5, 4.7, or 4.9, etc.;

[0046] "0.5 - 2" can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9, etc.

[0047] Other specific point values within the above - mentioned numerical ranges can be selected, and will not be elaborated one by one here.

[0048] Preferably, the aerosol former includes any one or a combination of at least two of 1,2 - propylene glycol, glycerol, or xylitol.

[0049] Preferably, the aerosol former is a combination of 1,2 - propylene glycol, glycerol, and xylitol.

[0050] Preferably, the mass ratio of 1,2 - propylene glycol, glycerol, and xylitol is (1 - 3):(1 - 3):(0.5 - 1.5).

[0051] The first "1 - 3" can be 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4, 2.6, or 2.8, etc.;

[0052] The second "1 - 3" can be 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4, 2.6, or 2.8, etc.;

[0053] "0.5 - 1.5" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, or 1.4, etc.

[0054] Other specific point values within the above - mentioned numerical ranges can be selected, and will not be elaborated one by one here.

[0055] Preferably, the temperature of the mixing in step (2) is 25 - 35°C, for example, it can be 26°C, 27°C, 28°C, or 29°C, etc.

[0056] Preferably, after the mixing in step (2), the cryogenic aerosol former is allowed to stand.

[0057] Preferably, the standing time is 12 - 24 h, for example, it can be 14 h, 16 h, 18 h, 20 h, or 22 h, etc.

[0058] Preferably, the mass ratio of the supercritical - state tobacco pulp and the cryogenic aerosol former in step (3) is (2 - 5):1, for example, it can be 2.2:1, 2.5:1, 2.8:1, 3:1, 3.2:1, 3.5:1, 3.8:1, 4:1, 4.2:1, 4.5:1, or 4.8:1, etc.

[0059] Preferably, the mixing in step (3) is carried out in a supercritical container.

[0060] Preferably, the temperature of the supercritical container is set to 30 - 35 °C (for example, it can be 31 °C, 32 °C, 33 °C or 34 °C, etc.), and the pressure is set to 70 - 75 atm (for example, it can be 71 atm, 72 atm, 73 atm or 74 atm, etc.).

[0061] Preferably, before the supercritical thick slurry in step (4) is laid flat, it needs to stand for 1 - 2 h, for example, it can be 1.1 h, 1.3 h, 1.5 h, 1.7 h or 1.9 h, etc.

[0062] Other specific point values within the above numerical ranges can be selected, and will not be elaborated one by one here.

[0063] In a second aspect, the present invention provides a heated cigarette sheet, which is prepared by the method for preparing a heated cigarette sheet by the ultra - low temperature thick slurry method according to the first aspect.

[0064] In a third aspect, the present invention provides an application of the heated cigarette sheet as described in the second aspect in the preparation of heated cigarettes.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] (1) The present invention uses supercritical CO2 to replace traditional water as the tobacco slurry mixing solvent. Due to the high - temperature - intolerant characteristics of surfactants, the supercritical CO2 can effectively reduce the working temperature of the key process of forming and drying. The forming and drying of the sheet can be achieved at room temperature, which not only meets the working conditions of anionic and cationic surfactants, but also avoids the heating of tobacco leaves during the preparation process, improving the sensory quality of heated cigarettes;

[0067] (2) The method of the present invention first introduces anionic and cationic surfactants into the research field of heated cigarette thick slurry method sheets. Through the self - characteristics of anionic and cationic surfactants, a thick slurry method sheet that can effectively emit smoke under the heating condition of 100 - 150 °C is realized;

[0068] (3) The effective heating temperature of the heated cigarette sheet prepared by the present invention is lower than 150 °C. Therefore, the release amount of harmful carbonyl compounds in the aerosol of the heated cigarette loaded with the sheet of the present invention is less. Specific Embodiments

[0069] To further illustrate the technical means and effects adopted by the present invention, the following further describes the present invention with reference to embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, rather than limiting the present invention.

[0070] For those without specific technologies or conditions noted in the examples, follow the technologies or conditions described in the literature in this field or the product specifications. For reagents or instruments without the manufacturer noted, they are all conventional products that can be obtained through regular channels of purchase.

[0071] The sources of some raw materials used in the embodiments of the present invention are as follows:

[0072] Name Source Tobacco leaves (tobacco dust or cut tobacco) Tobacco leaves from central Yunnan Wood fiber Shijiazhuang Xinyuan Cellulose Co., Ltd. Carboxymethyl cellulose Henan Ruiren Bioengineering Co., Ltd. Guar gum Jiangsu Caiwei Biotechnology Co., Ltd.

[0073] The remaining raw materials can be used as long as they are purchased from regular distributors.

[0074] Example 1

[0075] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method, and the specific steps are as follows:

[0076] (1) Prepare supercritical tobacco slurry

[0077] Take 8 parts of wood fiber powder (40 mesh), 40 parts of tobacco leaf powder (40 mesh), 2 parts of guar gum, 2 parts of carboxymethyl cellulose, and 10 parts of supercritical CO2 and put them into a supercritical container and mix evenly. Set the temperature of the supercritical container to 31.3 °C and the pressure to 72.9 atm to obtain supercritical tobacco slurry;

[0078] (2) Prepare an ultra-low temperature atomizing agent

[0079] Take 8 parts of glycerol, 8 parts of 1,2-propanediol, 4 parts of xylitol, 0.8 part of stearic acid, 0.2 part of sodium dodecylbenzenesulfonate, 0.8 part of tetra-n-octylammonium bromide, and 0.2 part of dodecyltrimethylammonium chloride, mix evenly at 30 °C, and obtain an ultra-low temperature atomizing agent after standing for 24 hours;

[0080] (3) Prepare supercritical thick slurry

[0081] Add the ultra-low temperature atomizing agent prepared in step (2) to the supercritical container through a molecular turbo pump and mix evenly with the supercritical tobacco slurry. The mass ratio of the ultra-low temperature atomizing agent to the supercritical tobacco slurry is 1:3. Set the temperature of the supercritical container to 31.3 °C and the pressure to 72.9 atm to obtain supercritical thick slurry;

[0082] (4) Prepare an ultra-low temperature thick slurry method sheet

[0083] Gradually open the supercritical container for pressure relief. After standing for 2 h, spread the supercritical thick slurry flat in a sheet forming mold to obtain a heated cigarette sheet.

[0084] Example 2

[0085] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method, and the specific steps are as follows:

[0086] (1) Preparation of supercritical tobacco pulp

[0087] Take 4 parts of wood fiber powder (30 mesh), 50 parts of tobacco leaf powder (50 mesh), 4 parts of guar gum, 2 parts of carboxymethyl cellulose, and 6 parts of supercritical CO2, put them into a supercritical container and mix evenly. Set the temperature of the supercritical container to 33.3 °C and the pressure to 70.5 atm to obtain supercritical tobacco pulp;

[0088] (2) Preparation of ultra-low temperature atomizing agent

[0089] Take 12 parts of glycerol, 4 parts of 1,2-propanediol, 6 parts of xylitol, 0.5 part of stearic acid, 0.05 part of sodium dodecylbenzenesulfonate, 0.3 part of tetra-n-octylammonium bromide, and 0.05 part of dodecyltrimethylammonium chloride, mix them evenly at 25 °C, and let stand for 20 hours to obtain an ultra-low temperature atomizing agent;

[0090] (3) Preparation of supercritical thick pulp

[0091] Add the ultra-low temperature atomizing agent prepared in step (2) to the supercritical container through a molecular turbo pump, and mix it evenly with the supercritical tobacco pulp. The mass ratio of the ultra-low temperature atomizing agent to the supercritical tobacco pulp is 1:2. Set the temperature of the supercritical container to 34.5 °C and the pressure to 74.6 atm to obtain supercritical thick pulp;

[0092] (4) Preparation of ultra-low temperature thick pulp method sheet

[0093] Gradually open the supercritical container to relieve pressure. After standing for 1.5 h, spread the supercritical thick pulp in a sheet forming mold to obtain a heated cigarette sheet.

[0094] Example 3

[0095] This example provides a method for preparing a heated cigarette sheet by the ultra-low temperature thick pulp method, and the specific steps are as follows:

[0096] (1) Preparation of supercritical tobacco pulp

[0097] Take 10 parts of wood fiber powder (50 mesh), 30 parts of tobacco leaf powder (30 mesh), 0.5 part of guar gum, 1 part of carboxymethyl cellulose, and 16 parts of supercritical CO2, put them into a supercritical container and mix evenly. Set the temperature of the supercritical container to 35 °C and the pressure to 74.6 atm to obtain supercritical tobacco pulp;

[0098] (2) Preparation of ultra-low temperature atomizing agent

[0099] Take 4 parts of glycerol, 12 parts of 1,2 - propanediol, 1 part of xylitol, 0.2 part of stearic acid, 0.15 part of sodium dodecylbenzenesulfonate, 0.5 part of tetra - n - octylammonium bromide, and 0.2 part of dodecyltrimethylammonium chloride, mix them evenly at 35°C, and obtain an ultra - low - temperature atomizing agent after standing for 15 hours;

[0100] (3) Prepare supercritical thick slurry

[0101] Add the ultra - low - temperature atomizing agent prepared in step (2) to the supercritical container through a molecular turbo pump, and mix it evenly with the supercritical - state tobacco slurry. The mass ratio of the ultra - low - temperature atomizing agent to the supercritical - state tobacco slurry is 1:2. Set the temperature of the supercritical container to 32.7°C and the pressure to 70.6 atm to obtain supercritical thick slurry;

[0102] (4) Prepare ultra - low - temperature thick - slurry - method thin sheets

[0103] Gradually open the supercritical container for pressure relief. After standing for 1.8 h, spread the supercritical thick slurry evenly in a thin - sheet forming mold to obtain a heated cigarette thin sheet.

[0104] Example 4

[0105] This example provides a method for preparing a heated cigarette thin sheet by the ultra - low - temperature thick - slurry method. The difference between this method and Example 1 is only that the adhesive in step (1) is 4 parts of guar gum, and the remaining steps are the same as those in Example 1.

[0106] Example 5

[0107] This example provides a method for preparing a heated cigarette thin sheet by the ultra - low - temperature thick - slurry method. The difference between this method and Example 1 is only that the adhesive in step (1) is 4 parts of carboxymethyl cellulose, and the remaining steps are the same as those in Example 1.

[0108] Example 6

[0109] This example provides a method for preparing a heated cigarette thin sheet by the ultra - low - temperature thick - slurry method. The difference between this method and Example 1 is only that the atomizing agent in step (2) does not include glycerol, and its reduced amount is added to 1,2 - propanediol and xylitol according to the proportion of parts, and the ratio of the atomizing agent to the surfactant remains unchanged, and the remaining steps are the same as those in Example 1.

[0110] Example 7

[0111] This example provides a method for preparing a heated cigarette thin sheet by the ultra - low - temperature thick - slurry method. The difference between this method and Example 1 is only that the atomizing agent in step (2) does not include 1,2 - propanediol, and its reduced amount is added to glycerol and xylitol according to the proportion of parts, and the ratio of the atomizing agent to the surfactant remains unchanged, and the remaining steps are the same as those in Example 1.

[0112] Example 8

[0113] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The difference between this method and that of Example 1 is only that the atomizing agent in step (2) does not include xylitol, and the reduced amount is added to glycerol and 1,2-propanediol according to the proportion by parts, and the ratio of the atomizing agent to the surfactant remains unchanged. The remaining steps are the same as those of Example 1.

[0114] Example 9

[0115] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The difference between this method and that of Example 1 is only that the surfactant in step (2) does not include cationic surfactant, and the reduced amount is added to stearic acid and sodium dodecylbenzenesulfonate according to the proportion by parts, and the ratio of the atomizing agent to the surfactant remains unchanged. The remaining steps are the same as those of Example 1.

[0116] Example 10

[0117] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The difference between this method and that of Example 1 is only that the surfactant in step (2) does not include anionic surfactant, and the reduced amount is added to tetra-n-octylammonium bromide and dodecyltrimethylammonium chloride according to the proportion by parts, and the ratio of the atomizing agent to the surfactant remains unchanged. The remaining steps are the same as those of Example 1.

[0118] Example 11

[0119] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The difference between this method and that of Example 1 is only that in step (3), the mass ratio of the ultra-low temperature atomizing agent to the supercritical state tobacco pulp is 1:1, and the remaining steps are the same as those of Example 1.

[0120] Example 12

[0121] This example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The difference between this method and that of Example 1 is only that in step (3), the mass ratio of the ultra-low temperature atomizing agent to the supercritical state tobacco pulp is 1:6, and the remaining steps are the same as those of Example 1.

[0122] Comparative Example 1

[0123] This comparative example provides a method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method. The specific steps are as follows:

[0124] (1) Prepare a mixed tobacco pulp

[0125] Take 8 parts of wood fiber powder (40 mesh), 40 parts of tobacco leaf powder (40 mesh), 2 parts of guar gum, 2 parts of carboxymethyl cellulose and 10 parts of water, mix them evenly at a temperature of 31.3 °C and a pressure of 72.9 atm to obtain a mixed tobacco pulp;

[0126] (2) Prepare an ultra-low temperature atomizing agent

[0127] Take 8 parts of glycerol, 8 parts of 1,2-propanediol, 4 parts of xylitol, 0.8 part of stearic acid, 0.2 part of sodium dodecylbenzenesulfonate, 0.8 part of tetra-n-octylammonium bromide, 0.2 part of dodecyltrimethylammonium chloride, mix them evenly at 30 °C, and obtain an ultra-low temperature atomizing agent after standing for 24 hours;

[0128] (3) Prepare a supercritical thick pulp

[0129] Mix the ultra-low temperature atomizing agent prepared in step (2) with the mixed tobacco pulp in step (1) evenly at a temperature of 31.3 °C and a pressure of 72.9 atm. The mass ratio of the ultra-low temperature atomizing agent to the mixed tobacco pulp is 1:3 to obtain a thick pulp;

[0130] (4) Prepare an ultra-low temperature thick pulp method sheet

[0131] Let the thick pulp stand for 2 h and then spread it flat in a sheet forming mold to obtain a heated cigarette sheet.

[0132] Comparative Example 2

[0133] This comparative example provides a method for preparing a heated cigarette sheet by the ultra-low temperature thick pulp method. The specific steps are as follows:

[0134] (1) Prepare a supercritical state tobacco pulp

[0135] Take 8 parts of wood fiber powder (40 mesh), 40 parts of tobacco leaf powder (40 mesh), 2 parts of guar gum, 2 parts of carboxymethyl cellulose, and 10 parts of supercritical CO2 and put them into a supercritical container and mix them evenly. Set the temperature of the supercritical container to 31.3 °C and the pressure to 72.9 atm to obtain a supercritical state tobacco pulp;

[0136] (2) Prepare an ultra-low temperature atomizing agent

[0137] Take 8 parts of glycerol, 8 parts of 1,2-propanediol and 4 parts of xylitol and mix them evenly at 30 °C, and obtain an ultra-low temperature atomizing agent after standing for 24 hours;

[0138] (3) Prepare a supercritical thick pulp

[0139] Add the cryogenic atomizing agent prepared in step (2) to the supercritical container through a molecular turbo pump, and mix it evenly with the supercritical tobacco paste. The mass ratio of the cryogenic atomizing agent to the supercritical tobacco paste is 1:3. Set the temperature of the supercritical container to 31.3 °C and the pressure to 72.9 atm to obtain a supercritical thick paste;

[0140] (4) Preparation of cryogenic thick paste method flakes

[0141] Gradually open the supercritical container for pressure relief. After standing for 2 h, spread the supercritical thick paste in a flake forming mold to obtain a heated cigarette flake.

[0142] Application Example 1-12

[0143] This application example provides 12 kinds of heated cigarettes. The heated cigarettes are obtained by respectively loading the heated cigarette flakes prepared in Examples 1-12 into a heated cigarette stick structure (three-section structure), and controlling the filling amount of the heated cigarette flakes to be 200 ± 20 mg / stick.

[0144] Comparative Application Example 1-2

[0145] This comparative application example provides 2 kinds of heated cigarettes. The heated cigarettes are obtained by respectively loading the heated cigarette flakes prepared in Comparative Examples 1-2 into a heated cigarette stick structure (three-section structure), and controlling the filling amount of the heated cigarette flakes to be 200 ± 20 mg / stick.

[0146] Test Example 1

[0147] Smoke the heated cigarettes prepared in Application Examples 1-12, Comparative Application Examples 1-2, and commercially available heated cigarettes using a smoking device with the same heating curve (constant temperature heating temperature is 150 °C). The smoking uses the Canadian deep smoking mode, and then uses a 44 mm Cambridge filter to trap the aerosol to obtain the aerosol release amount (ACM) between different samples. The results are shown in Table 1:

[0148] Table 1

[0149]

[0150]

[0151] As can be seen from the data in Table 2, compared with commercially available heated cigarettes, the heated cigarette flakes prepared by the present invention can release more aerosol at 150 °C, indicating that the heated cigarettes have a better smoking effect at a lower temperature.

[0152] Test Example 2 Comparison of the release amounts of harmful carbonyl compounds in aerosols

[0153] The harmful carbonyl compound release amounts of the aerosols captured by Application Examples 1-3, Comparative Application Examples 1-2, and commercially available products in Test Example 1 were tested. The test method refers to the current industry standard YC / T 254-2008 "Determination of Main Carbonyl Compounds in Mainstream Cigarette Smoke - High Performance Liquid Chromatography Method". The results are shown in Table 2 below:

[0154] Table 2

[0155]

[0156]

[0157] From the data in Tables 1 and 2, it can be seen that compared with commercially available heated cigarettes, the content of harmful carbonyl compounds in the aerosol of the heated cigarettes prepared by the present invention is lower.

[0158] Test Example 3

[0159] Seven top-notch cigarette graders were organized to conduct sensory evaluation tests on the heated cigarettes obtained from Application Examples 1-12 and Comparative Application Examples 1-2 using smoking devices with the same heating curve (constant heating temperature of 150 °C). The commercially available heated cigarettes were used as the control heated cigarettes according to the evaluation contents and judgment criteria in Table 3.

[0160] The scoring results are shown in Table 4 (the average value of each group is taken and reserved to one decimal place).

[0161] Table 3 Sensory Index Scoring Scale

[0162] Index 0-3 4-6 7-9 Quality of aroma Poor to relatively poor Slightly better to fairly good Relatively good to good Amount of aroma Little to slightly present Slightly present to fairly sufficient Relatively sufficient to sufficient Off-flavors None to weak Slightly present to present Relatively strong to strong Smoke concentration Small to relatively small Medium to slightly large Relatively large to large Softness and fineness Poor to relatively poor Slightly better to fairly good Relatively good to good Irritation None to slightly present Slightly present to present Relatively large to large Body Small to relatively small Medium to slightly large Relatively large to large Cleanliness Lingering on the tongue to less clean Slightly clean to fairly clean Relatively clean to pure

[0163] Table 4 Sensory Quality Evaluation Results of Different Test Samples

[0164]

[0165]

[0166] As can be seen from Table 4, compared with commercially available heated cigarettes, the heated cigarettes obtained from Application Examples 1-3 of the present invention have obvious improvements in aspects such as smoke concentration, strength, fineness, and aroma characteristics, and have less oral irritation.

[0167] From Application Examples 4 and 5, it can be known that when the adhesive is any one of guar gum or carboxymethyl cellulose, the mixing effect of the tobacco pulp in supercritical CO2 is poor, and the off-flavors are significantly worse after being used in heated cigarettes, and the irritation of the smoke is significantly increased;

[0168] From Application Examples 6-8, it can be known that when the atomizing agent is not the combination of glycerol, 1,2-propanediol, and xylitol of the present invention, the smoke concentration and strength of the heated cigarettes are poor;

[0169] As can be seen from Application Examples 9-10, when the surfactant is not a combination of an anionic surfactant and a cationic surfactant, its optimization effect on the aerosol is poor, and thus the sensory quality of the heated cigarette at low temperature is poor;

[0170] As can be seen from Application Examples 11-12, when the mass ratio of the ultra-low temperature aerosol to the supercritical state tobacco pulp is not within the scope defined in the present invention, the sensory quality of the final heated cigarette also decreases;

[0171] As can be seen from Comparative Example 1, when conventional water is used as the tobacco pulp solvent, the surfactant has a poor treatment effect on the aerosol, and thus the sensory experience of the heated cigarette is also poor;

[0172] As can be seen from Comparative Example 2, when the aerosol is not treated with a surfactant, the sensory quality of the heated cigarette is significantly poor.

[0173] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a method for preparing a heated cigarette sheet by an ultra-low temperature thick pulp method, its products and applications, but the present invention is not limited to the above-mentioned detailed methods, that is, it does not mean that the present invention must rely on the above-mentioned detailed methods to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A method for preparing a heated cigarette sheet by a cryogenic thick slurry method, characterized in that, The method includes: (1) Mixing wood fiber, tobacco leaves, an adhesive, and supercritical CO2 to obtain supercritical state tobacco pulp; (2) Mixing a surfactant and an atomizing agent to obtain an ultra-low temperature atomizing agent; (3) Mixing the supercritical state tobacco pulp and the ultra-low temperature atomizing agent to obtain supercritical thick pulp; (4) Spreading the supercritical thick pulp in a mold and obtaining the heated cigarette sheet after molding; The adhesive is a combination of guar gum and carboxymethyl cellulose; The surfactant is a combination of stearic acid, sodium dodecylbenzenesulfonate, tetra-n-octylammonium bromide, and dodecyltrimethylammonium chloride; The atomizing agent is a combination of 1,2-propanediol, glycerol, and xylitol; In step (3), the mass ratio of the supercritical state tobacco pulp to the ultra-low temperature atomizing agent is (2-5):1; The ultra-low temperature means that the heating temperature of the heated cigarette is lower than 150°C.

2. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 1, wherein In step (1), the mass ratio of the wood fiber, tobacco leaves, adhesive, and supercritical CO2 is (2-5):(15-25):(1-3):(3-8).

3. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, wherein The wood fiber is subjected to a crushing treatment.

4. The method for preparing reconstituted tobacco sheets by the ultra-low temperature thick slurry method according to claim 3, characterized in that, The particle size of the crushed wood fiber is 30-60 mesh.

5. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, wherein, The tobacco leaves are subjected to a crushing treatment.

6. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 5, characterized in that, The particle size of the crushed tobacco leaves is 30-60 mesh.

7. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 1, characterized in that, The mass ratio of the guar gum to the carboxymethyl cellulose is 1:(0.5-1.5).

8. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, characterized in that, The mixing in step (1) is carried out in a supercritical container.

9. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 8, characterized in that, The temperature of the supercritical container is set to 30-35°C, and the pressure is set to 70-75 atm.

10. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 1, characterized in that, In step (2), the mass ratio of the surfactant to the atomizing agent is (0.5-10):

100.

11. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 1, characterized in that, The mass ratio of the stearic acid, sodium dodecylbenzenesulfonate, tetra-n-octylammonium bromide, and dodecyltrimethylammonium chloride is (2-6):(0.1-1.5):(3-5):(0.5-2).

12. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, wherein The mass ratio of the 1,2-propanediol, glycerol, and xylitol is (1-3):(1-3):(0.5-1.5).

13. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, characterized in that, The temperature of the mixing in step (2) is 25-35°C.

14. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, characterized in that, After the mixing in step (2), the ultra-low temperature atomizing agent is allowed to stand.

15. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 14, characterized in that, The standing time is 12-24 h.

16. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 1, characterized in that, The mixing in step (3) is carried out in a supercritical container.

17. The method for preparing a heated cigarette sheet by an ultra-low temperature thick slurry method according to claim 16, characterized in that, The temperature of the supercritical container is set to 30-35°C, and the pressure is set to 70-75 atm.

18. The method for preparing a heated cigarette sheet by the ultra-low temperature thick slurry method according to claim 1, wherein, Before spreading the supercritical thick pulp in step (4), it needs to stand for 1-2 h.

19. A heated cigarette sheet, characterized in that, The heated cigarette sheet is prepared by the method for preparing a heated cigarette sheet by the ultra-low temperature thick pulp method according to any one of claims 1-18.

20. Use of a heated cigarette sheet as described in claim 19 in the preparation of a heated cigarette.

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