Smoke-free heating cigarette and preparation method thereof

Abstract

The invention provides a smokeless heating cigarette and a preparation method thereof, the heating cigarette comprises a fuming unit, a cooling unit and a filter tip unit, and the three units are coaxially wrapped and connected by external cigarette paper; the cooling unit is located between the fuming unit and the filter tip unit; the fuming unit is a cylinder and is prepared from the following raw materials: an inorganic porous material, tobacco powder, a tobacco extract and perfume. The smokeless heating cigarette has the advantages of being stable, mellow and mild in cigarette fragrance, a smoker can obtain smoking satisfaction, visible smoke is not generated after the smoker smokes the heating cigarette, and the influence of second-hand smoke on surrounding people is reduced to a certain extent by reducing emission of the smoke.

Description

Technical Field

[0001] The invention belongs to the technical field of heated cigarettes, and in particular relates to a smokeless heated cigarette and a preparation method thereof. Background Art

[0002] In order to meet the diverse needs of smokers for tobacco products, and to a certain extent respond to the general trend of global tobacco control. Major tobacco companies, out of dual considerations of citizen health and public opinion, have begun to regard the development of new products as an important part of promoting their own development, in order to seek a balance between satisfying consumer demand and citizen health and environmental protection. In this context, new tobacco products, which are regarded as key supplements, have received widespread attention. There are some obvious differences between new tobacco products and traditional tobacco products in terms of characteristics. They include smokeless types, heated cigarettes and electronic cigarettes. The common features of the three are that they do not require combustion, have basically zero tar, and contain nicotine.

[0003] Smokeless tobacco products (STPs) are mainly divided into two categories according to the smoking method: oral smokeless tobacco products (tobacco powder, chewing tobacco, snus, tobacco paste) and nasal smokeless tobacco products (American dry snuff, Asian dry snuff). It can be simply understood as products that do not produce smoke during use and are inhaled through the nose or mouth. Since smokeless tobacco products do not produce smoke, this reduces the impact of secondhand smoke on people around them to a certain extent.

[0004] Electronic cigarettes are mainly composed of four parts: e-liquid (containing nicotine, flavors, solvent propylene glycol, etc.), heating system, power supply and filter. They produce aerosol with a specific smell through heating and atomization for smokers to use.

[0005] Heated cigarettes are generally heated by electric heating elements, which heat and bake the tobacco material segments in the cigarette cartridge at a temperature far below the combustion temperature, so that the flavor components of the tobacco are volatilized at a relatively low temperature to meet people's smoking needs. In existing products, a large amount of aerosol is generated because smoke-generating agents are added to the tobacco materials.

[0006] In summary, smokeless tobacco products do not produce smoke, which to a certain extent reduces the impact of secondhand smoke on people around them, and heated cigarettes are closer to traditional cigarettes in terms of physiological feelings and psychological perceptions, showing a strong development momentum. Combining the two and inventing a smokeless heated cigarette is an innovative attempt in the context of tobacco control and health awareness enhancement, aiming to provide consumers with more diversified and healthier smoking options. Summary of the invention

[0007] In view of the deficiencies in the prior art, an object of the present invention is to provide a smokeless heated cigarette and a preparation method thereof.

[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a smokeless heated cigarette, the heated cigarette comprising a smoking unit, a cooling unit and a filter unit, the three units being coaxially wrapped and connected by an external cigarette paper;

[0010] The cooling unit is located between the smoking unit and the filter unit; the smoking unit is a cylinder, and its preparation raw materials include inorganic porous materials, tobacco powder, tobacco extracts and spices.

[0011] The smoke-generating unit in the smoke-free heated cigarette provided by the present invention adds flavorings and tobacco extracts, and the combination of the two can make the smoke aroma of the heated cigarette stable and mellow, thereby giving the smoker an excellent sensory experience. When smoking the heated cigarette, no visible smoke is produced, which reduces the impact of secondhand smoke on people around to a certain extent. In addition, the inorganic porous material can also slowly and continuously release the aroma and nicotine, so that the smoker can experience the same satisfaction as smoking traditional cigarettes / heated cigarettes.

[0012] Preferably, the mass ratio of the inorganic porous material, tobacco powder, tobacco extract and flavor is (2-3):(1-2):(2-4):(0.2-1).

[0013] Wherein "2-3" can be 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8 or 2.9, etc.;

[0014] "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0015] "2-4" can be 2.1, 2.3, 2.5, 2.7, 2.9, 3, 3.1, 3.3, 3.5, 3.7 or 3.9, etc.;

[0016] “0.2-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1, etc.

[0017] Preferably, the tobacco extract is a substance extracted from tobacco leaves having a nicotine content of 2.5%-3.2% (eg, 2.6%, 2.7%, 2.8%, 2.9%, 3% or 3.1%, etc.).

[0018] Preferably, the tobacco powder is obtained by crushing tobacco leaves with a nicotine content of 2.5%-3.2% (for example, 2.6%, 2.7%, 2.8%, 2.9%, 3% or 3.1%, etc.), and the tobacco powder particle size ranges from 140 mesh to 200 mesh (for example, 150 mesh, 160 mesh, 170 mesh, 180 mesh or 190 mesh, etc.).

[0019] Preferably, the tobacco leaves include any one of flue-cured tobacco, air-cured tobacco or sun-cured tobacco, or a combination of at least two of them.

[0020] Preferably, the flue-cured tobacco is upper-middle flue-cured tobacco.

[0021] Preferably, the air-cured tobacco includes any one of burley tobacco, Maryland tobacco or cigar wrapper tobacco, or a combination of at least two of them.

[0022] Preferably, the sun-cured tobacco includes any one of sun-cured red tobacco, sun-cured yellow tobacco or yellow flower tobacco, or a combination of at least two of them.

[0023] Preferably, the inorganic porous material includes any one of molecular sieve, halloysite or foamed aluminum, or a combination of at least two of them.

[0024] The inorganic porous material selected in the present invention can only be decomposed at high temperature (greater than 600°C) and will not decompose when heated by traditional smoking utensils (200-450°C), so it will not affect the sensory quality of cigarettes. In addition, the above-mentioned inorganic porous material has the characteristics of large specific surface area and strong adsorption capacity, which can further reduce the smoke emission of heated cigarettes and improve the sensory quality of heated cigarettes.

[0025] Preferably, the fragrance includes guaiacol, 4-methylguaiacol, 4-vinylguaiacol, 2,6-dimethoxyphenol, 2-methyltetrahydrofuran-3-one furfural, 5-methylfurfural, furfuryl alcohol, 3,5-dimethyl-1,2-cyclopentanedione, methylcyclopentenolone, 3,4-dimethyl-1,2-cyclopentanedione, β-damascenone, β-dihydrodamascenone, geranylacetone, β-ionone, ethylcyclopentenolone, maltol, ethyl Any one of maltol, 2-methylpyrazine, 4-methylthiazole, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3-dimethylpyrazine, 3-ethylpyridine, 2,3,5-trimethylpyrazine, 2-acetylfuran, 2-acetylpyridine, 2-acetylpyrrole, benzaldehyde, furfural, 5-methylfurfural, phenylacetaldehyde, benzyl alcohol, palmitic acid, isovaleric acid, 2-methylvaleric acid, acetic acid or dihydroactin, or a combination of at least two thereof.

[0026] Preferably, the fragrance is a combination of guaiacol, 5-methylfurfural, geranylacetone, palmitic acid and 2,5-dimethylpyrazine.

[0027] In the heated cigarette of the present invention, the spices are synergistically matched with guaiacol, 5-methylfurfural, geranylacetone, palmitic acid and 2,5-dimethylpyrazine, and can be matched with tobacco extract to better improve the aroma quality and aroma quantity of the cigarette, thereby making the smoker feel more comfortable and soft after use, and the aftertaste is longer.

[0028] Preferably, the mass ratio of guaiacol, 5-methylfurfural, geranylacetone, palmitic acid and 2,5-dimethylpyrazine is (1-3):(0.1-1):(1.5-3):(1-2):(0.5-1.5).

[0029] Wherein "1-3" can be 1.1, 1.3, 1.5, 1.7, 1.9, 2, 2.1, 2.3, 2.5, 2.7 or 2.9, etc.;

[0030] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.;

[0031] “1.5-3” can be 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8 or 2.9, etc.;

[0032] "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0033] “0.5-1.5” can mean 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3 or 1.4, etc.

[0034] Preferably, the cooling unit is a hollow structure.

[0035] Preferably, the cooling unit can be a section of hollow rods with the same diameter, or a composite of two sections of hollow rods with different diameters, or a composite of three sections of hollow rods with different diameters, preferably a binary two-section large and small hole composite structure.

[0036] Preferably, the outer material of the cooling unit includes cellulose diacetate and glycerol triacetate.

[0037] Preferably, the outer material of the cooling unit is composed of 70%-85% (for example, 71%, 73%, 75%, 77%, 80%, 82% or 84%) diacetate cellulose and 15%-30% (for example, 16%, 18%, 20%, 22%, 24%, 26% or 28%) triacetin.

[0038] Preferably, the filter unit is made of cellulose diacetate and glycerol triacetate.

[0039] Preferably, the filter unit material is composed of 80%-95% (for example, 81%, 83%, 85%, 87%, 90%, 92% or 94%) diacetate cellulose and 5%-20% (for example, 6%, 8%, 10%, 12%, 14%, 16% or 18%) triacetin.

[0040] Any specific point value within the above numerical range can be selected, and will not be described in detail here.

[0041] In a second aspect, the present invention provides a method for preparing the smokeless heated cigarette as described in the first aspect, the preparation method comprising:

[0042] (1) mixing an inorganic porous material, tobacco powder, tobacco extract and flavoring to obtain a smoke-generating unit;

[0043] (2) The smoking unit, the cooling unit and the filter unit are coaxially wrapped with cigarette paper to obtain the smokeless heating cigarette.

[0044] Preferably, the specific steps of step (1) include:

[0045] (a) pulverizing an inorganic porous material, and then mixing it with tobacco extract, tobacco powder and spices in water to obtain a suspension;

[0046] (b) subjecting the suspension obtained in step (a) to spray freeze drying to obtain a powdery product;

[0047] (c) mixing the powdered product obtained in step (b) with a binder and subjecting the mixture to extrusion molding to obtain a smoking unit.

[0048] Preferably, in step (a), the smoke powder accounts for 2-10% of the total mass of the suspension, for example, 3%, 4%, 5%, 6%, 7%, 8% or 9%.

[0049] Preferably, the temperature of the spray freeze drying in step (b) is -15°C to -5°C, for example, it can be -6°C, -7°C, -8°C, -9°C, -10°C, -11°C, -12°C, -13°C or -14°C, etc.

[0050] Preferably, the pressure of the spray freeze drying in step (b) is 2-5 Bar, for example, it can be 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar or 4.5 Bar.

[0051] Preferably, the particle size of the powdered product in step (b) is 5-250 μm, for example, 10 μm, 20 μm, 50 μm, 80 μm, 100 μm, 200 μm, 240 μm or 250 μm, etc.

[0052] Preferably, the binder in step (b) comprises any one of guar gum, locust bean gum, carboxymethyl cellulose, sodium alginate or chitosan, or a combination of at least two thereof.

[0053] Preferably, the extrusion molding in step (c) is performed through a circular die hole.

[0054] Preferably, the circumference of the circular die hole is 16-25 mm, for example, it can be 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm or 24 mm.

[0055] Preferably, the specific steps of step (1) include:

[0056] (I) customizing an inorganic porous material into a cylinder as a smoke-generating unit matrix;

[0057] mixing tobacco extract, tobacco powder, spices and water to obtain a suspension;

[0058] (II) loading the suspension into a smoke-generating unit matrix to obtain a smoke-generating unit precursor;

[0059] (III) freeze-drying the smoke unit precursor to obtain the smoke unit.

[0060] Preferably, the inorganic porous material in step (I) is foamed aluminum.

[0061] Preferably, the circumference of the cylinder is 16-25 mm, for example, it can be 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm or 24 mm.

[0062] Preferably, in step (I), the smoke powder accounts for 2-10% of the total mass of the suspension, for example, 3%, 4%, 5%, 6%, 7%, 8% or 9%.

[0063] Preferably, the freeze-drying temperature in step (III) is -10 to -1°C, for example, -2°C, -3°C, -4°C, -5°C, -6°C, -7°C, -8°C or -9°C.

[0064] Any specific point value within the above numerical range can be selected, and will not be described in detail here.

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

[0066] (1) The smoke-generating unit in the smoke-free heated cigarette provided by the present invention adds flavorings and tobacco extracts. The combination of the two can make the smoke aroma of the heated cigarette stable and mellow, thereby giving the smoker an excellent sensory experience. When smoking the heated cigarette, no visible smoke is produced, which reduces the impact of secondhand smoke on people around to a certain extent. In addition, the inorganic porous material can also slowly and continuously release the aroma and nicotine, so that the smoker can experience the same satisfaction as smoking traditional cigarettes / heated cigarettes.

[0067] (2) The preparation method of the smokeless heated cigarette provided by the present invention does not destroy the active ingredients in tobacco powder, tobacco extract and its flavor, does not have an adverse effect on product quality, and the preparation method can meet the requirements of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 is an overall structural diagram of a smokeless heating cigarette according to Embodiment 1 of the present invention;

[0069] Figure 2 1 is an overall structural diagram of the smokeless heating cigarette according to Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0070] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0071] The raw materials used in the following examples and comparative examples can be used as long as they are purchased from regular dealers.

[0072] Example 1

[0073] This embodiment provides a smokeless heated cigarette, which comprises a smoking unit, a cooling unit and a filter unit, and the three units are coaxially wrapped and connected by an external cigarette paper;

[0074] The cooling unit is located between the smoking unit and the filter unit;

[0075] The cooling unit is a hollow structure, specifically a binary two-stage large and small hole composite structure;

[0076] The outer material of the cooling unit is formed by 80% diacetate cellulose tow and 20% triacetin;

[0077] The filter unit is made of 90% cellulose diacetate tow and 10% triacetin;

[0078] The smoking unit is cylindrical, and its raw materials are halloysite, burley tobacco powder (particle size 180 mesh), tobacco extract (sun-cured red tobacco) and spices in a mass ratio of 5:3:6:0.8;

[0079] The fragrance is guaiacol, 5-methylfurfural, geranyl acetone, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 4:1:5:3:2.

[0080] The preparation method of the smokeless heating cigarette is as follows:

[0081] (1) crushing halloysite, and then mixing it with tobacco extract, tobacco powder and spices in water to obtain a suspension, wherein the tobacco powder accounts for 8% of the total amount of the suspension;

[0082] (2) spray freeze-drying the suspension obtained in step (1) at -10°C and 3 Bar, and then crushing to obtain a powder product with a particle size of 50±5 μm;

[0083] (3) mixing the powdered product obtained in step (2) with a binder and subjecting the mixture to extrusion molding through a circular die hole with a circumference of 17 mm to obtain a smoking unit;

[0084] (4) The smoke-generating unit, the cooling unit and the filter unit are coaxially wrapped with cigarette paper in the order of the smoking unit, the cooling unit and the filter unit to obtain the smoke-free heating cigarette.

[0085] Example 2

[0086] This embodiment provides a smokeless heated cigarette, which comprises a smoking unit, a cooling unit and a filter unit, and the three units are coaxially wrapped and connected by an external cigarette paper;

[0087] The cooling unit is located between the smoking unit and the filter unit;

[0088] The cooling unit is a hollow structure, specifically a one-dimensional straight-through hole structure;

[0089] The outer material of the cooling unit is formed by 70% diacetate cellulose tow and 30% triacetin;

[0090] The filter unit is made of 95% cellulose diacetate tow with 5% triacetin added;

[0091] The smoking unit is a cylinder, and its preparation raw materials are foamed aluminum with a mass ratio of 3:1:4:0.5, mixed tobacco powder (particle size 140 mesh) of flue-cured tobacco upper tobacco and sun-cured tobacco with a mass ratio of 1:1, tobacco extract (Maryland tobacco) and spices;

[0092] The fragrance is guaiacol, 5-methylfurfural, geranyl acetone, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 3:0.8:3:1:1.5.

[0093] The preparation method of the smokeless heating cigarette is as follows:

[0094] (1) Customize the aluminum foam into a cylinder with a circumference of 22 mm as the smoke unit matrix;

[0095] (2) mixing tobacco extract, tobacco powder, spices and water to obtain a suspension, wherein the weight of the tobacco powder accounts for 5% of the suspension;

[0096] (3) loading the suspension into a smoke-generating unit matrix to obtain a smoke-generating unit precursor;

[0097] (4) freeze-drying the smoke-generating unit precursor at -5°C to obtain the smoke-generating unit;

[0098] (5) The smoke-generating unit, the cooling unit and the filter unit are coaxially wrapped with cigarette paper in the order of the smoking unit, the cooling unit and the filter unit to obtain the smoke-free heating cigarette.

[0099] Example 3

[0100] This embodiment provides a smokeless heated cigarette, which comprises a smoking unit, a cooling unit and a filter unit, and the three units are coaxially wrapped and connected by an external cigarette paper;

[0101] The cooling unit is located between the smoking unit and the filter unit;

[0102] The cooling unit is a hollow structure, specifically a binary two-stage large and small hole composite structure;

[0103] The outer material of the cooling unit is formed by 85% diacetate cellulose tow with 15% triacetin added;

[0104] The filter unit is made of 80% cellulose diacetate tow and 20% triacetin;

[0105] The smoking unit is cylindrical, and its preparation raw materials are molecular sieves, flue-cured tobacco powder (particle size 200 mesh), tobacco extracts (cigar wrapper tobacco and burley tobacco in a mass ratio of 1:1:1) and spices in a mass ratio of 1:1:0.8;

[0106] The fragrance is guaiacol, 5-methylfurfural, geranylacetone, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 1:1:1.5:2:0.5.

[0107] The preparation method of the smokeless heating cigarette is as follows:

[0108] (1) crushing the molecular sieve, and then mixing it with tobacco extract, tobacco powder and flavoring in water to obtain a suspension, wherein the tobacco powder accounts for 10% of the total amount of the suspension;

[0109] (2) spray freeze-drying the suspension obtained in step (1) at -15°C and 5 Bar, and then crushing to obtain a powder product with a particle size of 120±5 μm;

[0110] (3) mixing the powdered product obtained in step (2) with a binder and subjecting the mixture to extrusion molding through a circular die hole with a circumference of 24 mm to obtain a smoking unit;

[0111] (4) The smoke-generating unit, the cooling unit and the filter unit are coaxially wrapped with cigarette paper in the order of the smoking unit, the cooling unit and the filter unit to obtain the smoke-free heating cigarette.

[0112] Example 4

[0113] This embodiment provides a smokeless heating cigarette, which is different from Example 1 only in that the flavor is guaiacol, 5-methylfurfural, geranyl acetone and palmitic acid in a mass ratio of 4:1:5:3, and the amount of the flavor is kept unchanged. The rest of the structure, components and preparation process are consistent with Example 1.

[0114] Example 5

[0115] This embodiment provides a smokeless heating cigarette, which is different from Example 1 only in that the flavor is guaiacol, 5-methylfurfural, geranyl acetone and 2,5-dimethylpyrazine in a mass ratio of 4:1:5:2, and the amount of the flavor is kept unchanged. The rest of the structure, components and preparation process are consistent with Example 1.

[0116] Example 6

[0117] This embodiment provides a smokeless heating cigarette, which is different from Example 1 only in that the flavor is guaiacol, 5-methylfurfural, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 4:1:3:2, and the amount of the flavor is kept unchanged. The rest of the structure, components and preparation process are consistent with Example 1.

[0118] Example 7

[0119] This embodiment provides a smokeless heating cigarette, which is different from Example 1 only in that the flavor is guaiacol, geranylacetone, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 4:5:3:2, and the amount of the flavor is kept unchanged. The rest of the structure, components and preparation process are consistent with Example 1.

[0120] Example 8

[0121] This embodiment provides a smokeless heating cigarette, which differs from Example 1 only in that the flavoring agent is 5-methylfurfural, geranyl acetone, palmitic acid and 2,5-dimethylpyrazine in a mass ratio of 1:5:3:2, and the amount of the flavoring agent is kept unchanged. The rest of the structure, components and preparation process are consistent with Example 1.

[0122] Example 9

[0123] This embodiment provides a smokeless heating cigarette, which is different from Embodiment 1 only in that the material of the filter unit is only cellulose diacetate tow, and no triacetin is applied. The rest of the structure, components and preparation process are consistent with Embodiment 1.

[0124] Example 10

[0125] This embodiment provides a smokeless heating cigarette, which is different from Embodiment 1 only in that the inorganic porous material is activated carbon, and the addition amount thereof is kept unchanged, and the rest of the structure, components and preparation process are consistent with Embodiment 1.

[0126] Embodiment 11

[0127] This embodiment provides a smoke-free heated cigarette, which is different from Example 1 only in that the raw materials for preparing the smoking unit are halloysite, tobacco powder, tobacco extract and flavoring in a mass ratio of 4:3:1:3; and the percentage of tobacco powder in the suspension is kept unchanged during the preparation process, and the rest of the structure, components and preparation process are consistent with Example 1.

[0128] Example 12

[0129] This embodiment provides a smoke-free heated cigarette, which is different from Example 1 only in that the raw materials for preparing the smoking unit are halloysite, tobacco powder, tobacco extract and flavoring in a mass ratio of 1:0.5:5:2; and the percentage of tobacco powder in the suspension is kept unchanged during the preparation process, and the rest of the structure, components and preparation process are consistent with Example 1.

[0130] Comparative Example 1

[0131] This embodiment provides a smokeless heating cigarette, which differs from Embodiment 1 only in that the raw materials for preparing the smoking unit do not include inorganic porous materials, and the usage ratio of tobacco powder, tobacco extract, flavoring and water remains unchanged, and the remaining structures and components are consistent with Embodiment 1, and the preparation method refers to Embodiment 1.

[0132] Comparative Example 2

[0133] This embodiment provides a smokeless heating cigarette, which differs from Embodiment 1 only in that the raw materials for preparing the smoking unit do not include flavorings, and the usage ratio of the inorganic porous material, tobacco powder, tobacco extract and water remains unchanged, and the remaining structures and components are consistent with Embodiment 1, and the preparation method refers to Embodiment 1.

[0134] Comparative Example 3

[0135] This embodiment provides a smokeless heating cigarette, which differs from Embodiment 1 only in that the raw materials for preparing the smoking unit do not include tobacco extract, and the usage ratio of the inorganic porous material, tobacco powder, flavoring and water remains unchanged. The remaining structures and components are consistent with those of Embodiment 1, and the preparation method refers to that of Embodiment 1.

[0136] Test Example 1 Smoke-free effect test

[0137] The heated cigarettes obtained in Examples 1-12 and Comparative Examples 1-3 and commercially available heated cigarettes were smoked in a closed space with the same environment and size using a smoking device with the same heating curve (the constant temperature heating temperature was 345° C.). The smoking was performed using the Canadian deep smoking mode. After the smoking was completed, the air in the space was tested for PM 2.5 The test method was carried out in accordance with HJ 653-2021. The results are shown in Table 1.

[0138] Table 1

[0139]

[0140]

[0141] It can be seen from the data in Table 1 that compared with the control heated cigarette, the PM in the air after smoking the smoke-free heated cigarette obtained by the present invention is 2.5 A lower content means that the heated cigarette produces less smoke, which can reduce the impact of secondhand smoke on people around to a certain extent.

[0142] As can be seen from Example 10, when the inorganic porous material is activated carbon rather than the type specified in the present invention, due to its lower decomposition temperature, PM in the air 2.5 High content;

[0143] It can be seen from Examples 11-12 that when the mass ratio of the inorganic porous material, tobacco powder, tobacco extract and flavor is not within the range specified in the present invention, it will also affect the PM in the air after smoking the heated cigarette. 2.5 content;

[0144] From Comparative Example 1, it can be seen that when the raw materials for preparing the smoking unit do not include inorganic porous materials, the PM in the air after smoking the heated cigarette is 2.5 The content is significantly higher, indicating that by adding specific inorganic porous materials to the heated cigarette of the present invention, the emission of smoke can be reduced, thereby reducing the impact of secondhand smoke on people around.

[0145] Test Example 2 Sensory Evaluation

[0146] Seven top smoking testers were organized to use smoking utensils with the same heating curve (constant heating temperature was 345°C) and conduct sensory smoking test on the heated cigarettes obtained from Example 1-12 and Comparative Application Example 1-3 according to the evaluation content and judgment criteria in Table 2.

[0147] The scoring results are shown in Table 3 (the average value of each group is taken, and one decimal place is retained).

[0148] Table 2 Sensory index scoring scale

[0149]

[0150]

[0151] Table 3 Sensory quality evaluation results of different samples

[0152]

[0153] It can be seen from Table 3 that the heated cigarettes obtained in Examples 1-3 of the present invention are excellent in terms of smoking satisfaction, fineness and aroma characteristics, and have less oral irritation.

[0154] It can be seen from Examples 4-8 that when any one of guaiacol, 5-methylfurfural, geranylacetone, palmitic acid or 2,5-dimethylpyrazine is missing from the flavor, the softness, aroma quality and aroma volume of the heated cigarette are significantly poor, and the irritation is significantly increased;

[0155] It can be seen from Example 9 that when triacetin is not added to the material of the filter unit, the softness and fineness of the heated cigarette is poor and the impurity is high;

[0156] As can be seen from Example 10, when the inorganic porous material is activated carbon rather than the type specified in the present invention, its adsorption effect on the flavor is slightly poor, thus affecting the sensory effect of the heated cigarette;

[0157] It can be seen from Examples 11-12 that when the mass ratio of the inorganic porous material, tobacco powder, tobacco extract and flavor is not within the range defined by the present invention, the sensory quality of the final heated cigarette is also reduced;

[0158] It can be seen from Comparative Example 1 that when the raw materials for preparing the smoking unit do not include inorganic porous materials, the irritation and impurities of the heated cigarette are relatively high;

[0159] It can be seen from Comparative Examples 2 and 3 that when the raw materials for preparing the smoking unit do not include spices or tobacco extracts, the aroma quality and aroma quantity of the heated cigarette are significantly poor, indicating that the spices and tobacco extracts selected in the present invention have a synergistic effect in improving the sensory effects of heated cigarettes.

[0160] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate a smokeless heated cigarette and a preparation method thereof. However, the present invention is not limited to the above-mentioned embodiments, which does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0161] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0162] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A smokeless heating cigarette, characterized in that: The heated cigarette comprises a smoking unit, a cooling unit and a filter unit, and the three units are coaxially wrapped and connected by an external cigarette paper; The cooling unit is located between the smoking unit and the filter unit; The smoking unit is a cylinder, and its preparation raw materials include inorganic porous materials, tobacco powder, tobacco extract and flavors.

2. The smokeless heating cigarette according to claim 1, characterized in that: The mass ratio of the inorganic porous material, tobacco powder, tobacco extract and flavor composition is (5-10):(2-4):(1-2):(0.2-1).

3. The smokeless heating cigarette according to claim 1 or 2, characterized in that: The inorganic porous material includes any one of molecular sieve, halloysite or foamed aluminum, or a combination of at least two thereof; Preferably, the fragrance includes guaiacol, 4-methylguaiacol, 4-vinylguaiacol, 2,6-dimethoxyphenol, 2-methyltetrahydrofuran-3-one furfural, 5-methylfurfural, furfuryl alcohol, 3,5-dimethyl-1,2-cyclopentanedione, methylcyclopentenolone, 3,4-dimethyl-1,2-cyclopentanedione, β-damascenone, β-dihydrodamascenone, geranylacetone, β-ionone, ethylcyclopentenolone, maltol, ethyl Any one of maltol, 2-methylpyrazine, 4-methylthiazole, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2,3-dimethylpyrazine, 3-ethylpyridine, 2,3,5-trimethylpyrazine, 2-acetylfuran, 2-acetylpyridine, 2-acetylpyrrole, benzaldehyde, furfural, 5-methylfurfural, phenylacetaldehyde, benzyl alcohol, palmitic acid, isovaleric acid, 2-methylvaleric acid, acetic acid or dihydroactin, or a combination of at least two thereof; Preferably, the fragrance is a combination of guaiacol, 5-methylfurfural, geranylacetone, palmitic acid and 2,5-dimethylpyrazine.

4. The smokeless heating cigarette according to any one of claims 1 to 3, characterized in that: The cooling unit is a hollow structure; Preferably, the peripheral material of the cooling unit includes cellulose diacetate and glycerol triacetate; Preferably, the filter unit is made of cellulose diacetate and glycerol triacetate.

5. A method for preparing a smokeless heated cigarette according to any one of claims 1 to 4, characterized in that: The preparation method thereof comprises: (1) mixing an inorganic porous material, tobacco powder, tobacco extract and flavoring to obtain a smoke-generating unit; (2) The smoking unit, the cooling unit and the filter unit are coaxially wrapped with cigarette paper to obtain the smokeless heating cigarette.

6. The preparation method according to claim 5, characterized in that: The specific steps of step (1) include: (a) pulverizing an inorganic porous material, and then mixing it with tobacco extract, tobacco powder and spices in water to obtain a suspension; (b) subjecting the suspension obtained in step (a) to spray freeze drying to obtain a powdery product; (c) mixing the powdered product obtained in step (b) with a binder and subjecting the mixture to extrusion molding to obtain a smoking unit.

7. The preparation method according to claim 6, characterized in that: In step (a), the smoke powder accounts for 2-10% of the total mass of the suspension; Preferably, the temperature of the spray freeze drying in step (b) is -15°C to -5°C; Preferably, the spray freeze drying pressure in step (b) is 2-5 Bar; Preferably, the particle size of the powdered product in step (b) is 5-250 μm; Preferably, the binder in step (b) comprises any one of guar gum, locust bean gum, carboxymethyl cellulose, sodium alginate or chitosan, or a combination of at least two thereof.

8. The preparation method according to claim 6 or 7, characterized in that: The extrusion molding process in step (c) is performed by extruding through a circular die hole; Preferably, the circumference of the circular die hole is 16-25 mm.

9. The preparation method according to claim 5, characterized in that: The specific steps of step (1) include: (I) customizing an inorganic porous material into a cylinder as a smoke-generating unit matrix; mixing tobacco extract, tobacco powder, spices and water to obtain a suspension; (II) loading the suspension into a smoke-generating unit matrix to obtain a smoke-generating unit precursor; (III) freeze-drying the smoke unit precursor to obtain the smoke unit.

10. The preparation method according to claim 9, characterized in that: The inorganic porous material in step (I) is foamed aluminum; Preferably, the circumference of the cylinder is 16-25 mm; Preferably, in step (I), the smoke powder accounts for 2-10% of the total mass of the suspension; Preferably, the freeze-drying temperature in step (III) is -10 to -1°C.

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