Preparation and application of a granular material with both cooling and harm reduction functions

Abstract

The present invention relates to the preparation and application of a granular material with both cooling and harm reduction functions. Specifically, in order to reduce the temperature stimulation of mainstream smoke to the human oral cavity and improve the cigarette smoking comfort of consumers, the present invention adopts phase change material and water-absorbing material as substrates, and utilizes its phase change mechanism, high specific heat capacity and porous structure to design and develop a material with both cooling and harm reduction functions. The material can be used in the filter material of heat-not-burn cigarettes and traditional cigarettes.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco materials, and in particular to functional particles having the functions of cooling and reducing harm. Background Art

[0002] Heat-not-burn cigarettes use external heating elements at 200-400°C to produce smoke without burning tobacco. This type of tobacco product has good development prospects because its smoke contains relatively few harmful substances and is close to the physiological feelings and smoking methods of traditional cigarettes.

[0003] However, due to the relatively small size and short cigarette length of heat-not-burn cigarettes, the inlet temperature of the smoke is relatively high. The suitable temperature for the human oral cavity is 10-40°C. On the one hand, there will be discomfort when the smoke temperature exceeds 40°C, and burning pain on the tip of the tongue will be felt when it exceeds 50°C; on the other hand, excessively high filter temperature will also affect the filter's interception effect on smoke aerosol particles, thereby having a certain impact on the sensory quality of the smoke. At present, the cooling method is mainly based on structure and materials, and the materials are heat-absorbing materials, heat-storing materials, heat-conducting materials, etc. to achieve the transfer of smoke heat. However, the current cooling method ignores the effect of moisture in smoke with higher specific heat capacity on the cooling effect. The specific heat capacity of liquid water is 4.2×10 3 (J / kg·℃) is a natural and efficient heat storage material. As smoke enters the mouth, the moisture in the smoke will release heat and affect the temperature of the mouth. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the inventor of the present application considered introducing a water-absorbing material to remove moisture from the smoke; at the same time, the porous structure of the water-absorbing material can also have the function of reducing harm. Therefore, the purpose of the present invention is to provide a design, preparation, and application method of a granular material with both cooling and harm reduction functions. Specifically, in order to reduce the temperature stimulation of mainstream smoke to the human oral cavity and improve the comfort of consumers' cigarette smoking, the present invention adopts phase change materials and water-absorbing materials as substrates, and utilizes its phase change mechanism, high specific heat capacity and porous structure to design and develop a material with both cooling and harm reduction functions, which can be used in filter materials for heat-not-burn cigarettes and traditional cigarettes.

[0005] To this end, in a first aspect of the present invention, the present invention provides a method for preparing temperature-reducing and harm-reducing particles, comprising:

[0006] (1) mixing a phase change material, a water-absorbing material and an optional adhesive to obtain a mixed material;

[0007] (2) adding a dispersant to the mixed material to obtain a dispersion;

[0008] (3) subjecting the dispersion to extrusion molding, shot blasting, drying and screening treatments in sequence to obtain cooling and harm-reducing particles;

[0009] in:

[0010] The phase change material is selected from sorbitol, erythritol, xylitol, arabinose, maltitol, lactitol, polylactic acid, polyethylene glycol, lauric acid, palmityl alcohol, myristic acid, palmitic acid, soybean polysaccharide, trehalose, isomalt, konjac gum, mannitol, isomaltulose, sodium sulfate decahydrate, sodium tetraborate decahydrate, ferrous sulfate heptahydrate, potassium aluminum sulfate dodecahydrate, disodium hydrogen phosphate dodecahydrate, magnesium sulfate heptahydrate, copper sulfate pentahydrate, preferably selected from konjac gum, erythritol, arabinose, maltitol;

[0011] The water-absorbing material is selected from montmorillonite, magnesium oxide, silicon dioxide, and molecular sieve;

[0012] The weight ratio of the phase change material to the water absorbing material is 5:1 to 1:1 (eg, 1:1, 14:5, 40:9).

[0013] In some embodiments, the adhesive is selected from modified starch, CMC, HPMC, microcrystalline cellulose.

[0014] In some embodiments, the adhesive is selected from microcrystalline cellulose, HPMC, and modified starch.

[0015] In some embodiments, when the adhesive is present, the weight ratio of the phase change material to the adhesive is 50:1 to 10:1 (eg, 40:1, 49:2, 14:1).

[0016] In some embodiments, the dispersant is water, ethanol, or any combination thereof.

[0017] In some embodiments, the weight of the dispersant is 20% to 180% of the weight of the mixed material, preferably 20% to 80% (eg, 20%, 25%, 50%, 58%, 80%).

[0018] In some embodiments, when the dispersant is a mixed solution of water and ethanol, the concentration of ethanol in the mixed solution is 40% to 60% (eg, 50%).

[0019] In some embodiments, after the extrusion molding, the mesh size range of the particles is 15-60 mesh (such as 20-30 mesh), and the moisture content of the particles is 8%-20% (preferably 10%-16%, such as 10.58%, 12%, 13.58%, 15.22%).

[0020] In some embodiments, after the shot blasting treatment, the mesh size of the particles ranges from 14 to 25 meshes, and the moisture content of the particles ranges from 3 to 12% (preferably 5% to 7%, such as 5.1%, 5.2%, 5.4%, 6.5%).

[0021] In some embodiments, the drying treatment is carried out at a temperature of 40 to 90° C. (such as 40° C., 60° C., 75° C., 85° C.) for 1-3 h (such as 1 h, 1.5 h, 2 h, 2.5 h, 3 h).

[0022] In some embodiments, after the sieving process, the particle size ranges from 10 to 60 meshes (eg, 14-25 meshes).

[0023] In some embodiments, the phase change material has a particle size range of 20 mesh or less.

[0024] In some embodiments, the water-absorbing material has a particle size range of 20 mesh or less.

[0025] In some embodiments, the specific surface area of ​​the water-absorbing material is 500 to 300 m 2 / g.

[0026] In some embodiments, the moisture absorption rate of the water-absorbing material is 20% to 50%.

[0027] In a second aspect of the present invention, the present invention provides a temperature-reducing and harm-reducing particle, which is prepared by any of the aforementioned methods.

[0028] In a third aspect of the present invention, the present invention provides a heat-not-burn cigarette or a traditional cigarette filled with the aforementioned temperature-reducing and harm-reducing particles.

[0029] Beneficial Effects

[0030] 1. The particles prepared by the method of the present invention have no obvious odor and bad residue, have no negative impact on the smoking quality, can effectively reduce the smoke temperature while filtering cigarette smoke, and have the function of reducing harm.

[0031] 2. Compared with smoking a conventional heat-not-burn cigarette without any particles, when the heat-not-burn cigarette with the particles prepared by the method of the present invention is smoked, the smoke outlet temperature can be significantly reduced (e.g., reduced by about 21°C or more), and the total particulate matter is reduced.

[0032] 3. Compared with smoking a conventional cigarette without any particles, when a conventional cigarette with particles prepared by the method of the present invention is smoked, the smoke outlet temperature can be significantly reduced (eg, reduced by more than 16° C.), and harmful components are reduced.

[0033] 4. In the method of the present invention, the selection of water-absorbing materials has a significant impact on the technical effect of the present invention, and the type of water-absorbing materials cannot be selected arbitrarily. If the water-absorbing materials of the present invention are replaced with other materials (such as sugar alcohols, specifically xylitol), the flue gas outlet temperature will increase significantly.

[0034] 5. In the method of the present invention, the weight ratio of the phase change material and the water absorbing material has a significant impact on the technical effect of the present invention. The weight ratio of the phase change material and the water absorbing material needs to be controlled within an appropriate range and cannot be adjusted at will. If the weight ratio of the phase change material and the water absorbing material in the method of the present invention is too large (such as a weight ratio of 10:1), the flue gas outlet temperature will increase significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shows how particles are added to cigarettes. DETAILED DESCRIPTION

[0036] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, but it will be appreciated by those skilled in the art that the following drawings and examples are only used to illustrate the present invention, rather than to limit the scope of the present invention. Various objects and advantages of the present invention will become apparent to those skilled in the art based on the following detailed description of the accompanying drawings and preferred embodiments.

[0037] The purpose of the present invention is to provide a design, preparation and application method of a granular material having both cooling and harm reduction functions, and the preparation method is as follows:

[0038] Phase change material powder, water-absorbing material powder and adhesive are mixed in a certain proportion, the phase change powder accounts for 50-98% of the total powder mass, the water-absorbing powder accounts for 2-50% of the total powder mass, and the adhesive accounts for 0-10% of the total powder mass. The three materials are mixed in a certain proportion, and an appropriate amount of water or ethanol or water and ethanol aqueous solution (20-180% of the weight of the material) is added, and granulation is performed after processes such as extrusion molding, shot blasting, drying, and screening. The mesh range of extrusion molding is 15-60 mesh, the moisture content is 8-20%, the mesh range after shot blasting is 14-25 mesh, and the moisture content is 3-12%; the drying temperature is 40-90°C, and the drying time is 1-3h.

[0039] The phase change material powder can undergo phase change and absorb heat at a certain temperature, including but not limited to sorbitol, erythritol, xylitol, arabinose, maltitol, lactitol, polylactic acid, polyethylene glycol, lauric acid, palmityl alcohol, myristic acid, palmitic acid, soybean polysaccharide, trehalose, isomalt, konjac gum, mannitol, isomaltulose, sodium sulfate decahydrate, sodium tetraborate decahydrate, ferrous sulfate heptahydrate, potassium aluminum sulfate dodecahydrate, disodium hydrogen phosphate dodecahydrate, magnesium sulfate heptahydrate, copper sulfate pentahydrate, etc. The particle size range is less than 20 meshes.

[0040] The water-absorbing material powder is aluminum oxide (α), magnesium oxide, zinc oxide, montmorillonite, silicon dioxide, molecular sieve, etc. The particle size range is below 20 meshes, and the specific surface area is 500-300m 2 / g; moisture absorption rate is 20-50%.

[0041] The adhesive is modified starch, CMC, HPMC, microcrystalline cellulose and the like.

[0042] The prepared particles are added to cigarettes in the following manner: Figure 1 .

[0043] The present invention is further explained below in conjunction with specific embodiments.

[0044] Embodiment 1

[0045] 1. Preparation of granules with both cooling and harm reduction functions

[0046] Konjac gum and montmorillonite are mixed in a mass ratio of 50:50, 58% ethanol aqueous solution (50% concentration) of the material weight is added, and granulation is carried out after extrusion molding, shot blasting, drying and screening processes. The mesh number range of extrusion molding is 20-30 mesh, and the moisture is 12%; the mesh number range after shot blasting is 14-25 mesh, and the moisture is 6.5%; the drying temperature is 85°C, and the drying time is 1.5h; the mesh number after screening is 14-25 mesh.

[0047] 2. Preparation of heat-not-burn cigarettes

[0048] HNB specifications (circumference*(filter length+cigarette length)): 23.0mm*(33mm+13mm), the length of the isolation section in the filter is 8mm, the length of the particle filling section is 15mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0049] Embodiment 2

[0050] 1. Preparation of granules with both cooling and harm reduction functions

[0051] Erythritol, magnesium oxide and microcrystalline cellulose are mixed in a mass ratio of 80:18:2, and 20% of the weight of the material is added with water, and granulated after extrusion molding, shot blasting, drying and screening. The mesh range of extrusion molding is 20-30 mesh, and the moisture content is 10.58%; the mesh range after shot blasting is 14-25 mesh, and the moisture content is 5.2%; the drying temperature is 60°C, and the drying time is 3h; the mesh number after screening is 14-25 mesh.

[0052] 2. Preparation of heat-not-burn cigarettes

[0053] HNB specifications (circumference*(filter length+cigarette length)): 23.0mm*(33mm+13mm), the length of the isolation section in the filter is 8mm, the length of the particle filling section is 15mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0054] Embodiment 3

[0055] 1. Preparation of granules with both cooling and harm reduction functions

[0056] Arabinose, silicon dioxide and HPMC are mixed in a mass ratio of 49:49:2, and 25% of water by weight of the material is added, and granulation is performed after extrusion molding, shot blasting, drying and screening. The mesh range of extrusion molding is 20-30 meshes, and the moisture content is 15.22%; the mesh range after shot blasting is 14-25 meshes, and the moisture content is 5.4%; the drying temperature is 40°C, and the drying time is 3h; the mesh number after screening is 14-25 meshes.

[0057] 2. Preparation of conventional cigarettes

[0058] Conventional cigarette specifications (circumference*(filter length+cigarette length)): 24.5mm*(27mm+47mm), the length of the isolation section in the filter is 7mm, the length of the particle filling section is 10mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0059] Embodiment 4

[0060] 1. Preparation of granules with both cooling and harm reduction functions

[0061] Maltitol, molecular sieve and modified starch are mixed in a mass ratio of 70:25:5, 80% of the weight of the material is added with water, and granulation is performed after extrusion molding, shot blasting, drying and screening. The mesh range of extrusion molding is 20-30 meshes, and the moisture content is 13.58%; the mesh range after shot blasting is 14-25 meshes, and the moisture content is 5.1%; the drying temperature is 75°C, and the drying time is 3 hours; the mesh range after screening is 14-25 meshes.

[0062] 2. Preparation of conventional cigarettes

[0063] Conventional cigarette specifications (circumference*(filter length+cigarette length)): 24.5mm*(27mm+47mm), the length of the isolation section in the filter is 7mm, the length of the particle filling section is 10mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0064] Comparative Example 1 : Heat-not-burn cigarettes without any particles

[0065] HNB specifications (circumference*(filter length+cigarette length)): 23.0mm*(33mm+13mm), the length of the isolation section in the filter is 8mm, the length of the particle filling section is 15mm, and the length of the filtration section is 10mm. No particles are filled in the particle filling section.

[0066] Comparative Example 2 : Heat-not-burn cigarettes filled with particles made of non-water-absorbing materials

[0067] 1. Particles prepared without water-absorbing materials

[0068] 100% konjac gum is added with 50% ethanol aqueous solution (50% concentration) of material weight, and granulated after extrusion molding, shot blasting, drying and screening process. Wherein the mesh number range of extrusion molding is 20-30 mesh, and the moisture is 12%; the mesh number range after shot blasting is 14-25 mesh, and the moisture is 6.5%; the baking temperature is 85 ℃, the drying time is 2h, and the mesh number after screening is 14-25 mesh.

[0069] 2. Preparation of heat-not-burn cigarettes

[0070] HNB specifications (circumference*(filter length+cigarette length)): 23.0mm*(33mm+13mm), the length of the isolation section in the filter is 8mm, the length of the particle filling section is 15mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0071] Comparative Example 3 : Heat-not-burn cigarettes filled with particles made without phase change materials

[0072] 1. Particles prepared without phase change material

[0073] Montmorillonite and CMC are added with 120% water of the weight of the materials in a mass ratio of 90:10, and granulated after extrusion molding, shot blasting, drying, and screening. The mesh range of extrusion molding is 20-30 meshes, and the moisture content is 12%; the mesh range after shot blasting is 14-25 meshes, and the moisture content is 6.5%; the drying temperature is 85℃, and the drying time is 2h; the mesh after screening is 14-25 meshes.

[0074] 2. Preparation of heat-not-burn cigarettes

[0075] HNB specifications (circumference*(filter length+cigarette length)): 23.0mm*(33mm+13mm), the length of the isolation section in the filter is 8mm, the length of the particle filling section is 15mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0076] Comparative Example 4 : Conventional cigarettes without any particles

[0077] Conventional cigarette specifications (circumference*(filter length+cigarette length)): 24.5mm*(27mm+47mm), the length of the isolation section in the filter is 7mm, the length of the particle filling section is 10mm, and the length of the filtration section is 10mm. No particles are filled in the particle filling section.

[0078] Comparative Example 5 : Conventional cigarettes filled with particles made without water-absorbing materials

[0079] 1. Particles prepared without water-absorbing materials

[0080] Arabinose and HPMC are mixed in a mass ratio of 98:2, and 20% of water by weight of the material is added, and granulation is performed after extrusion molding, shot blasting, drying, and screening. The mesh range of extrusion molding is 20-30 mesh, and the moisture content is 11.44%; the mesh range after shot blasting is 14-25 mesh, and the moisture content is 5.8%; the drying temperature is 40°C, and the drying time is 3 hours; the mesh number after screening is 14-25 mesh.

[0081] 2. Preparation of conventional cigarettes

[0082] Conventional cigarette specifications (circumference*(filter length+cigarette length)): 24.5mm*(27mm+47mm), the length of the isolation section in the filter is 7mm, the length of the particle filling section is 10mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0083] Comparative Example 6 : Conventional cigarettes filled with particles without phase change material

[0084] 1. Particles prepared without phase change material

[0085] Silicon dioxide and HPMC are mixed in a mass ratio of 98:2, and 140% of the weight of the materials are added with water, and granulated after extrusion molding, shot blasting, drying, and screening. The mesh range of extrusion molding is 20-30 mesh, and the moisture content is 9.5%; the mesh range after shot blasting is 14-25 mesh, and the moisture content is 3.2%; the drying temperature is 40°C, and the drying time is 3h; the mesh number after screening is 14-25 mesh.

[0086] 2. Preparation of conventional cigarettes

[0087] Conventional cigarette specifications (circumference*(filter length+cigarette length)): 24.5mm*(27mm+47mm), the length of the isolation section in the filter is 7mm, the length of the particle filling section is 10mm, and the length of the filtration section is 10mm. The particles prepared in step 1 are filled in the particle filling section, and the particle addition amount is 50mg / cigarette.

[0088] Comparative Example 7

[0089] Compared with the method of Example 1, the method of Comparative Example 7 is only different in that the water-absorbing material (montmorillonite) is replaced by xylitol.

[0090] Comparative Example 8

[0091] Compared with the method of Example 1, the difference of the method of Comparative Example 8 is that the weight ratio (or mass ratio) of the phase change material (konjac gum) and the water absorbing material (montmorillonite) is adjusted to 10:1.

[0092] Analysis and testing example 1 : Puff testing of heat-not-burn cigarettes

[0093] (1) The detection method of smoke outlet temperature is as follows: Use a heating cigarette device adaptability detection device (Qingdao Yizhong Technology Co., Ltd.) to smoke heated cigarettes. The start time of smoking is 20 seconds after the smoking device triggers heating. The interval between each puff is 20 seconds, the duration of puff is 2 seconds, the puff volume per puff is 35 mL, the puff airflow is square wave, and the smoke is captured using Cambridge filters. Each filter captures the total smoke of 5 cigarettes and calculates the average value. The total number of puffs is 5. The thermocouple is placed 2 mm from the mouthpiece, and the dynamic temperature sampling frequency is 10 Hz. Each group of samples is repeated 5 times, and the final result average is calculated.

[0094] (2) Conventional smoke components (total particulate matter, tar, moisture, and nicotine) were tested in accordance with the analysis method of GB / T19609-2004.

[0095] (3) The detection method of propylene glycol and glycerol is as follows: put the aspirated filter into a 5mL conical flask, add 20mL of isopropanol solution containing anhydrous ethanol (internal standard, mass concentration of 0.3mg / mL) and n-heptadecane (internal standard, mass concentration of 0.2mg / mL), shake and extract for 30min, take 1mL of the extract and put it into a chromatographic bottle for GC detection. The analysis conditions of GC are: injection port temperature: 250℃; injection volume: 1.0μL; temperature program: keep at 110℃ for 1min, then increase to 150℃ at a rate of 10℃ / min and keep for 3min; then increase to 220℃ at a rate of 30℃ / min and keep for 5min; detector temperature: 250℃; carrier gas: helium, purity ≥99.999%, flow rate: 0.7mL / min; split injection, split ratio is 20:1.

[0096] The results are shown in Table 1 below.

[0097] Table 1

[0098]

[0099] From the comparison results of Example 1 and Example 2 with Comparative Example 1 in Table 1 above, it can be seen that, compared with smoking a conventional heat-not-burn cigarette without adding any particles, when the heat-not-burn cigarette with the particles prepared in the embodiment of the present invention added is smoked, the smoke outlet temperature is reduced by more than about 21°C and the total particulate matter is reduced.

[0100] At the same time, from the comparison results of Example 1 and Comparative Example 7 in Table 1 above, it can be seen that if the water-absorbing material of the present invention is replaced with sugar alcohols (such as xylitol), the smoke outlet temperature will increase significantly. It can be seen that the selection of water-absorbing materials has a significant impact on the technical effect of the present invention, and the type of water-absorbing materials cannot be selected arbitrarily.

[0101] In addition, from the comparison results of Example 1 and Comparative Example 8 in Table 1 above, it can be seen that if the weight ratio of the phase change material and the water absorbing material of the present invention is too large (such as a weight ratio of 10:1), the flue gas outlet temperature will increase significantly. It can be seen that the weight ratio of the phase change material and the water absorbing material has a significant impact on the technical effect of the present invention, and the weight ratio of the phase change material and the water absorbing material needs to be controlled within an appropriate range and cannot be adjusted at will.

[0102] Analysis and Testing Example 2 :Puffing test of traditional cigarettes

[0103] (1) Smoke outlet temperature detection method: A heated cigarette was smoked using a heating device adaptability detection device (Qingdao Yizhong Technology Co., Ltd.). The smoking start time was 20 seconds after the smoking device triggered the heating, the interval between each puff was 20 seconds, the puff duration was 2 seconds, the puff volume per puff was 35 mL, the puff airflow was square wave, and the smoke was captured using a Cambridge filter. Each filter captured the total smoke of 5 cigarettes and calculated the average value. The total number of puffs was 5. The thermocouple was placed 2 mm from the mouthpiece, and the dynamic temperature sampling frequency was 10 Hz. Each group of samples was repeated 5 times, and the final result average was calculated.

[0104] (2) Detection method of mainstream cigarette smoke components (tar, CO): Test according to the analysis method of GB / T19609-2004.

[0105] (3) Evaluation of the hazard reduction indicators hydrogen cyanide (i.e., hydrocyanic acid) and benzo(α)pyrene (i.e., BaP): The tests were conducted in accordance with the analytical methods of YC / T 253-2019 and GB / T21130-2007, respectively.

[0106] (4) Calculation of hazard index: see Xie Jianping, Liu Huimin, Zhu Maoxiang et al. Study on hazard index of cigarette smoke. Tobacco Science and Technology, 2009.

[0107] The results are shown in Table 2 below.

[0108] Table 2

[0109]

[0110]

[0111] From the comparison results of Example 3 and Example 4 with Comparative Example 4 in Table 2 above, it can be seen that, compared with smoking a conventional cigarette without any particles, when a conventional cigarette with particles prepared by the embodiments of the present invention added is smoked, the smoke outlet temperature can be reduced by more than 16°C, and the harmful components are reduced.

[0112] The above are merely exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing cooling and harm-reducing granules, wherein include: (1) mixing a phase change material, a water-absorbing material and an optional adhesive to obtain a mixed material; (2) adding a dispersant to the mixed material to obtain a dispersion; (3) subjecting the dispersion to extrusion molding, shot blasting, drying and screening treatments in sequence to obtain cooling and harm-reducing particles; in: The phase change material is selected from sorbitol, erythritol, xylitol, arabinose, maltitol, lactitol, polylactic acid, polyethylene glycol, lauric acid, palmityl alcohol, myristic acid, palmitic acid, soybean polysaccharide, trehalose, isomalt, konjac gum, mannitol, isomaltulose, sodium sulfate decahydrate, sodium tetraborate decahydrate, ferrous sulfate heptahydrate, potassium aluminum sulfate dodecahydrate, disodium hydrogen phosphate dodecahydrate, magnesium sulfate heptahydrate, and copper sulfate pentahydrate; The water-absorbing material is selected from montmorillonite, magnesium oxide, silicon dioxide, and molecular sieve; And the weight ratio of the phase change material to the water absorbing material is 5:1 to 1:

1.

2. The method according to claim 1, in, The phase change material is selected from konjac gum, erythritol, arabinose and maltitol.

3. The method according to claim 1, in, The adhesive is selected from modified starch, CMC, HPMC, and microcrystalline cellulose.

4. The method according to claim 1, in, The adhesive is selected from microcrystalline cellulose, HPMC, and modified starch.

5. The method according to claim 1, in, When the adhesive is present, the weight ratio of the phase change material to the adhesive is 50:1 to 10:

1.

6. The method according to claim 1, in, The dispersant is water, ethanol or any combination thereof.

7. The method according to claim 1, in, The weight of the dispersant is 20% to 180% of the weight of the mixed material.

8. The method according to claim 1, in, The weight of the dispersant is 20% to 80% of the weight of the mixed material.

9. The method according to claim 6, in, When the dispersant is a mixed solution of water and ethanol, the concentration of the ethanol in the mixed solution is 40% to 60%.

10. The method according to claim 1, in, After the extrusion molding, the mesh number of the particles ranges from 15 to 60 meshes, and the moisture content of the particles ranges from 8% to 20%.

11. The method according to claim 10, in, After the extrusion molding, the particle size ranges from 20 to 30 meshes.

12. The method according to claim 10, in, After the extrusion molding, the moisture content of the particles is 10% to 16%.

13. The method according to claim 1, in, After the shot blasting treatment, the mesh size of the particles ranges from 14 to 25 meshes, and the moisture content of the particles ranges from 3 to 12%.

14. The method according to claim 13, in, After the shot blasting, the moisture content of the particles is 5% to 7%.

15. The method according to claim 1, in, The drying process is carried out at a temperature of 40 to 90° C. for 1 to 3 hours.

16. The method according to claim 1, in, The method has one or more technical features selected from the following (1)-(5): (1) After the screening process, the particle size ranges from 10 to 60 meshes; (2) The particle size of the phase change material is less than 20 meshes; (3) The particle size of the water-absorbing material is less than 20 meshes; (4) The specific surface area of ​​the water-absorbing material is 500 to 300 m 2 / g; (5) The moisture absorption rate of the water-absorbing material is 20% to 50%.

17. The method according to claim 16, in, After the screening process, the particle size range is 14-25 meshes.

18. A temperature-reducing and harm-reducing granule, which is prepared by the method according to any one of claims 1 to 17.

19. A heat-not-burn cigarette or a conventional cigarette filled with the temperature-reducing and harm-reducing particles of claim 18.

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