KR102652799B1 - Cooling filter rod, application and cigarette - Google Patents

Abstract

Cooling filter rod, application and cigarette are provided. The cooling filter rod is mainly formed by cooling particles; The cooling particle includes a particle body and a shell coated on the particle body, and the shell/or particle body includes a phase change material. The phase change material is coated on the surface of the particle material to form cooling particles, and the cooling particles are integrally formed into a cooling filter rod, and the cooling filter rod can be used directly for cigarette production after being combined with existing filter rods. There is; The cooling effect can be controlled according to the amount of phase change material and cooling filter rod, such filter rod can realize industrial production and has low cost and good cooling effect; The smoking resistance is small, the contact area between the smoke and the phase change material is large, and the cooling efficiency is high.

Description

Cooling filter rod, application and cigarette

The present invention relates to cooling filter rods, their applications and cigarettes, belonging to the technical field of cigarette production.

In the traditional cigarette smoking process, the heat generated by the cigarette combustion cone will be transferred to the filter by the mainstream smoke, and as smoking progresses, the temperature of the smoke passing through the filter gradually increases. Studies have shown that the temperature of the smoke in the filter can be as high as 70-80 degrees Celsius by the end of the smoke. If the temperature in the filter is too high, it will affect the filter's retention effectiveness and will also affect the consumer's evaluation of the sensory quality of the smoke. Therefore, it is necessary to appropriately lower the temperature of the smoke.

Heat-not-burn cigarettes produce smoke by heating a tobacco product with an external heating element. Typically, tobacco products reach atomization conditions at 250-350°C. To ensure the volume of smoke, less or no adsorption is required in the filter. The temperature of the hot atomized smoke entering the mouth through the filter will be higher than that of traditional cigarette combustion. Therefore, appropriate reduction of the temperature of smoke is also a key technology in the development of low-temperature cigarettes.

Chinese patent CN201510045745.4 provides a filter and cigarette. The temperature of the smoke is reduced by adding a phase change material to the filter, the phase change material used being a mixture of hydrated inorganic salts and urea, the mixture being sprayed onto cellulose acetate rods or its crystals mixed into two It is placed between filters. As is known in the art, the use and effectiveness of these hydrated salts are not ideal.

Chinese patent CN101396173 provides a vortex cooling and flavor retention method for cigarettes and a cigarette structure. Vortex channels are formed in front of the cigarette filter to achieve the same cooling effect as air, but their structure is complex and is not suitable for cigarette-type electronic cigarettes.

Perfuming through filters is usually in the form of flavor particles, flavor threads or capsules. For example, Chinese patent CN101390657 discloses a cigarette filter rod with peppermint sustained release function and its manufacturing process. A flavoring means is to use cotton threads impregnated with flavor, but it is difficult to achieve continuous flavor.

The technical problem to be solved by the present invention is that when cigarettes (including traditional cigarettes and cigarette-type electronic cigarettes) are smoked, the temperature of the smoke generated by combustion is relatively high, causing a burning sensation in the mouth of consumers ( The burning sensation affects the smoking experience.

In order to solve the above technical problems, the technical solution of the present invention is as follows:

The cooling filter rod is mainly formed by cooling particles; The cooling particle includes a particle body and a shell coated on the particle body, and the shell/or particle body includes a phase change material.

In this way, the cooling particles used have a core-shell structure, and in the surface shells a phase change material with a cooling function is dispersed. The cooling filter rod can be obtained by molding the cooling particles according to the required shape; After the cooling particles are stacked into a specific shape, the entire cooling filter rod formed has a loose and porous structure; When the cooling filter rod is applied to the cigarette product and the high temperature smoke passes through the cooling filter rod, the smoke can pass smoothly; Meanwhile, the high temperature smoke has a large contact area with the shells, so the cooling efficiency is high, a good cooling effect can be achieved, and the smoker's experience is improved.

Optionally, only the shell contains the phase change material; Optionally, only the particle body contains phase change material; Optionally, both the shell and particle body comprise a phase change material.

In some embodiments of the invention, the shell is made of a phase change material.

Additionally, the phase change material includes at least one of PLA, polyethylene glycol, stearic acid, palmitic acid, paraffin, microcrystalline wax, EVA, pentaerythritol, stearate-isopropanol ester, and stearate-glycerol ester. A suitable phase change material can ensure good cooling effect and coating effect, thereby improving the overall cooling performance of the cooling filter rod. Preferably, the phase change material comprises a mixture of PLA, polyethylene glycol, stearates (including series stearates) and EVA.

In some embodiments of the invention, the shell further includes a flavor enhancer. In this way, the shell of the cooling particles contains the phase change material and the flavor enhancer, and after the cooling particles are laminated into a specific shape, the entire cooling filter rod formed has a loose and porous structure, and the smoke can pass through smoothly. There is; In addition, when the cooling filter rod is applied to the cigarette product and the high temperature smoke passes through the cooling filter rod, the high temperature smoke has a large contact area with the shells, and the phase change material has a high absorption efficiency for the heat of the smoke, so that the cooling The efficiency is high, a good cooling effect is achieved, and the smoker's experience is improved; Meanwhile, the flavor enhancer in the shells is heated to release the flavor slowly, and the flavor enters the smoker's mouth with the smoke, giving the smoke a unique taste that can meet individual smoking needs; When the phase change material undergoes a phase change by absorbing heat, the flavor components inside the shell are slowly released, allowing flavor to be continuously added. In general, volatilization of flavor enhancers to produce flavor is also a heat absorbing process and is also beneficial for reducing smoke temperature.

Additionally, flavor enhancers include flavors and/or tobacco extracts; Preferably, the mass ratio of phase change material to flavor enhancer is 100:(0.5-10). Optionally, the flavor comprises at least one of menthone and coffee flavors, which may be specifically selected as required, and other types of flavors may also be selected as required.

Furthermore, the mass of the shell accounts for 0.5-30%, preferably 1-20%, of the total mass of the cooling particles. An appropriate amount of phase change material can ensure that the cooling effect meets the requirements, and the channels of the filter rod will not be blocked when the phase change is repeated in the smoking process.

In some embodiments of the invention, the particle body comprises plant fiber powder and/or inorganic material powder, furthermore the plant fiber powder and/or inorganic material powder has a mesh of 80-200 mesh, preferably 100-180 mesh. It has particle size.

Additionally, the plant fiber powder includes at least one of tobacco powder, corncob powder, rice husk powder, walnut shell powder, coconut shell powder, citrus peel powder, and grapefruit peel powder. Plant powder is natural, pollution-free and inexpensive, can be prepared with dense particles to reduce adsorption efficiency, is more suitable for low-temperature cigarettes, and can reduce the loss of cutters during cooling filter loading and preparation of cigarettes. Additionally, the inorganic material powder includes at least one of calcium carbonate, carbon powder, ceramics, silica gel, and molecular sieves. The use of inorganic materials does not introduce peculiar odor, and at the same time, the porous nature is partially exploited, so the cooling filter rod has better adsorption performance and is more suitable for ordinary cigarettes. In addition, the particle body further includes an auxiliary molding material, and the auxiliary molding material includes at least one of a binder, a wetting agent, and an excipient.

Additionally, the binder includes at least one of PVP, HPC, HPMC, SCMC, and modified starch; Humectants include water or alcohol; Excipients include microcrystalline cellulose and lactose. Suitable binders and wetting agents can ensure that the prepared particles have good shape and strength.

By reasonably adjusting the ratio of plant fiber powder and inorganic material powder, the adsorption performance of the cooling filter rod can be adjusted to an appropriate range, and the needs of different cigarettes can also be met.

In some embodiments of the invention, the particle body is obtained by thoroughly mixing the base powder, hot melt adhesive powder, excipients, and water, granulating, drying, and sieving; The base powder includes at least one of plant materials, inorganic materials, and metal powder; Additionally, the plant materials include at least one of tobacco raw materials, straw, peanut shells, bagasse, corn cobs, pericarp, and aromatic plants; The inorganic materials include at least one of carbon powder, clay, calcium carbonate, and silicon oxide; The metal powder includes at least one of iron powder, aluminum oxide, and copper powder. In general, the proportions of base powder, hot melt adhesive powder, excipients, and water can be selected as needed as long as they can be used for normal and well-mixed granulation and formation. The use of plant materials can reduce costs as much as possible, and aromatic plants also have a flavor effect in the filter rod. Inorganic materials and metal powders will not have a characteristic odor, and metal powders are more conducive to the cooling effect. Additionally, aromatic plants include at least one of sandalwood, agarwood, cloves, coffee, and anise.

Additionally, the hot melt adhesive powder includes at least one of EVA, TPU, PE, PA, and PES. The hot melt adhesive powder can ensure the formation of particles and the formation of particle rods. Meanwhile, hot melt adhesive powder has a certain phase change ability, so it can achieve a certain degree of phase change cooling effect. The mass ratio of hot melt adhesive powder to cooling particles is 5%-50%, preferably 10%-40%, and the contents of other components can be adjusted as required. An appropriate amount of hot melt adhesive can ensure sufficient adhesion, while an excessive amount may block channels during melting and affect the cooling effect.

Optionally, excipients include microcrystalline cellulose and pregelatinized starch. Furthermore, the cooling particles have a diameter of 10-50 mesh, preferably 20-35 mesh.

Moreover, when used to cool cigarette-type electronic cigarettes, the cooling particles are granulated by extrusion rounding, are spherical or approximately spherical particles, and have a bulk density of 0.8 to 2.5 g/ml. A spherical or approximately spherical shape can ensure sufficiently complex and continuous smoke channels inside the cooling filter rod, and a sufficiently high particle density ensures that adsorption performance is minimized without affecting the amount of smoke produced by the cigarette. do.

Additionally, when used to cool conventional cigarettes, the cooling particles are spherical or amorphous and have a bulk density of 0.4 to 1.6 g/ml. This can ensure sufficiently complex and continuous smoke channels inside the cooling filter rod, and the low particle density can ensure that the internal pores of the particles are not completely blocked, so that the particles still have a certain adsorption performance. Preferably, the moisture content of the cooling particles is 5-15 wt%, further 7-12 wt%. Maintaining the moisture content in an appropriate moisture content range can maintain the cigarette with good mouthfeel during smoking and prevent mildew on the cooling filter rod containing plant fiber powder.

Particles of appropriate diameters can ensure sufficient air permeability inside the filter rod, and appropriate moisture facilitates storage and shaping control.

Moreover, the effective porosity inside the cooling filter rod is 65-95%. In this way, the entire cooling filter rod has a porous structure with complex, continuous channels formed inside; After the high-temperature smoke enters the cooling filter rod from one end of the cooling filter rod, the high-temperature smoke quickly disperses into the pores of the cooling filter rod and sufficiently contacts the cooling particles to exchange heat, thereby realizing cooling; In addition, the high temperature smoke has a long travel distance in the cooling filter rod, so the achieved cooling effect is good. Sufficient effective porosity can meet the air permeability requirements inside the filter rod.

Additionally, the effective porosity within the cooling filter rod is 80-95%.

Moreover, the porous structure is honeycomb-shaped.

Optionally, the cooling filter rod is a loose, air-permeable cylinder.

Additionally, the cooling filter rod is formed by binding cooling particles through a binder.

Moreover, the cooled filter rod is mainly formed by cooled particles through the method of microwave heating or thermal coagulation.

Furthermore, the cooling filter rod is connected to a cut tobacco section or a smoking section for smoking, where the cooling filter rod is close to the cutting/smoking section. Optionally, the method of preparing the cooling filter rod includes the following steps:

(1) Mixing plant fiber powder and/or inorganic material powder with relevant auxiliary molding materials, granulating, drying and screening to obtain particle bodies; then coating the particle bodies with a phase change material to obtain cooled particles; and

(2) shaping the cooling particles obtained in step (1) to obtain a cooling filter rod; or

1) Thoroughly mix at least one of plant materials/inorganic materials/metal powder, hot melt adhesive powder, microcrystalline cellulose, pregelatinized starch, water, etc., granulate, dry, and sieve to obtain particle bodies. and; then coating the particle bodies with a phase change material to obtain cooling particles of appropriate diameters; and

2) Forming the obtained cooling particles into a cylinder with a certain size, that is, into the required cooling filter rod.

Alternatively, 1) mixing plant fiber powder and/or inorganic material powder with relevant auxiliary molding materials, granulating, drying, and screening to obtain base particles;

2) Heat and melt the phase change material, weigh and add an appropriate amount of flavor enhancer to the molten phase change material, and stir and shear at high speed for thorough and uniform mixing to form a mixed product for later use. Obtaining a liquid;

3) obtaining cooling particles by coating the base particles prepared in step 1) using the mixed liquid prepared in step 2) as a coating material; and

4) Obtaining a cooling filter rod with improved flavor by molding the cooling particles prepared in step 3) into a cylinder of a certain size.

Based on the same inventive concept, the invention further provides for the application of the above-described cooling filter rod in the production of cigarettes. Based on the same inventive concept, the present invention further provides a cigarette comprising the above-described cooling filter rod.

Furthermore, the cigarette includes a sequentially connected smoking portion and a filter, wherein the aforementioned cooling filter rod is arranged inside the filter.

Optionally, the cooled filter rod is compounded with existing filter rods in a certain ratio as a filter for conventional cigarettes or cigarette-type electronic cigarettes, for example, the cooled filter rod can be used to form a cigarette filter portion (filter). To configure it, it is arranged between two conventional filter rods, and all hot smoke needs to pass through the cooling filter rod before entering the mouth to ensure the cooling effect. Different existing filter rods are selected according to different usage requirements.

Additionally, existing filter rods include acetate filter rods, polypropylene fiber filter rods, paper filter rods, empty tube rods, etc.

Compared with the prior art, the technical effects brought by the technical solution of the present invention are as follows:

(1) The phase change material is coated on the surface of the particle material to form cooling particles, and the cooling particles are integrally formed into a cooling filter rod, which can be directly used in cigarette production after being combined with existing filter rods.

(2) The cooling effect can be controlled according to the amount of phase change material and cooling filter load. The shape of the cooling filter rod is simple and novel, and the brand-new filter rod facilitates industrial production and has low cost and good cooling effect.

(3) The smoking resistance is small, the contact area between the smoke and the phase change material is large, so the cooling efficiency is high, the temperature of the smoke entering the smoker's mouth can be greatly reduced, and the experience is improved.

(4) The flavor enhancer is combined with the phase change material, so that the cooling filter rod realizes the flavor function for the first time, and its application value is greatly increased.

(5) The temperature of the smoke entering the mouth is greatly reduced by controlling the effective porosity of the cooling filter rod and using means without ventilation or dilution based on the principle of physical cooling, and the cooling amplitude can reach more than 50%. .

The following examples are intended to illustrate the content of the present invention, rather than further limit the protection scope of the present invention.

Example 1

In this example, the testing process included the following steps:

1) 100 parts by mass of 100-150 mesh tobacco raw material powder, 20 parts by mass of modified starch and 30 parts by mass of microcrystalline cellulose are taken, mixed uniformly and then sprayed with 30 parts by mass of water, then mixed and mixed evenly. The soft material was prepared; 2) The soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh tobacco particles were taken for later use; 3) The obtained tobacco particles were coated with molten PEG1500 in an amount of 10% of the mass of the tobacco particles, followed by sieving, and 20-40 mesh tobacco particles were taken as cooled tobacco particles; 4) The obtained cooled tobacco particles were continuously molded by microwave into loose, porous cylinders with a circumference of 23.5 mm, and the cylinders were cut into 120 mm long cooled filter rods; 5) Cooling filter rods were combined with acetate fiber sections in a length ratio of 10:15 to prepare cigarettes, where the cooling sections were close to each other and the acetate fiber rods were also used to prepare cigarettes with the same specifications as the control. Ready. Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the results are shown in Table 1.

Example 2

In this example, the testing process included the following steps:

1) 80 parts by mass of 100-150 mesh corncob meal, 20 parts by mass of calcium carbonate, 10 parts by mass of HPMC and 40 parts by mass of microcrystalline cellulose are taken, mixed uniformly and then sprayed with 25 parts by mass of water, followed by uniform mixing. A soft material was prepared by mixing and mixing; 2) The soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh corncob particles were taken for later use; 3) Stearic acid and pentaerythritol in a mass ratio of 1:1 were melted to coat the obtained corncob particles in an amount of 5% of the mass of the corncob particles, followed by sieving, and 10-50 mesh corncob particles were cooled as cooled corncob particles. taken; 4) The obtained cooled corncob particles were continuously formed by heat setting into loose, porous cylinders with a circumference of 23.5 mm, and the cylinders were cut into 84 mm long cooled filter rods; 5) The cooling filter rods were combined with acetate fiber sections in a length ratio of 7:18 to prepare cigarettes, the cooling sections were close to the cut, and the acetate fiber rods were also prepared into cigarettes with the same specifications as the control. Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the results are shown in Table 1.

Example 3

In this example, the testing process included the following steps:

1) 60 parts by mass of 100-150 mesh grapefruit peel powder, 40 parts by mass of carbon powder, 20 parts by mass of modified starch, 20 parts by mass of microcrystalline cellulose and 10 parts by mass of lactose are taken, mixed uniformly and then added to water. 25 mass parts were sprayed, followed by uniform mixing to prepare a mixed soft material; 2) The soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh particles were taken for later use; 3) PEG3000, palmitic acid and stearate isopropanol ester in a mass ratio of 1:1:1 were melted and coated the obtained particles in an amount of 15% of the mass of the particles, and 20-40 mesh particles were taken as cooled particles. lost; 4) The obtained cooling particles were continuously molded by microwave into a loose, porous cylinder with a circumference of 23.5 mm, and the cylinder was cut into 120 mm long cooling filter rods; 5) Cooling filter rods were combined with hollow tube sections of paper in a length ratio of 10:15 to prepare low-temperature cigarettes, the cooling sections were close to the cut, and acetate fiber rods were used to prepare low-temperature cigarettes with the same specifications as the control. Also ready. Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the results are shown in Table 1.

Table 1 Temperature test results

Tests showed that the cooling filter rod provided by the present invention had a very obvious cooling effect and, compared to traditional filter rod cigarettes, the outlet temperature was reduced by more than 50%.

Example 4

In this example, the testing process included the following steps:

1) 100 parts by mass of 100-150 mesh tobacco raw material powder, 20 parts by mass of modified starch and 30 parts by mass of microcrystalline cellulose were taken, mixed uniformly and then sprayed with 30 parts by mass of water, followed by mixing and mixing evenly. The soft material was prepared; 2) The mixed soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh cooled particle cores were taken for later use; 3) PEG2000 was melted by heat and thoroughly mixed with menthone at a mass ratio of 100:0.5 to obtain a mixed liquid; 4) The obtained cooling particle cores were coated with mixed liquid in an amount of 10% of the mass of the cooling particles, followed by sieving, and 30-50 mesh cooling particles containing menthone were taken; 5) The obtained cooled particles were continuously molded by microwave into a loose, porous cylinder with a circumference of 23.5 mm, and the cylinder was cut into 120 mm long cooled filter rod sections; 6) Cooling filter rod sections were combined with acetate fiber sections in a length ratio of 10:15 to prepare cigarettes, the cooling sections were close to the cut, and the acetate fiber rods were also prepared with cigarettes of the same specifications as the control. . Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the temperature test results are shown in Table 2. At the same time, the two types of cigarettes smoked were evaluated, and the results are shown in Table 3.

Example 5

In this example, the testing process included the following steps:

1) 80 parts by mass of 100-150 mesh corncob meal, 20 parts by mass of calcium carbonate, 10 parts by mass of HPMC and 40 parts by mass of microcrystalline cellulose are taken, mixed uniformly and sprayed with 25 parts by mass of water, followed by uniformly mixing. A mixed soft material was prepared; 2) The mixed soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh cooled particle cores were taken for later use; 3) Stearic acid and pentaerythritol at a mass ratio of 1:1 were melted by heating and mixed completely and uniformly with tobacco extract at a mass ratio of 100:5 to obtain a mixed liquid; 4) The obtained cooling particles were coated with mixed liquid in an amount of 5% of the mass of the cooling particles, followed by sieving, and 20-40 mesh flavor enhanced cooling particles containing tobacco extract were taken; 5) The obtained cooling particles were continuously molded into loose, porous cylinders with a circumference of 23.5 mm by heat setting, and the cylinders were cut into 84 mm long cooling filter rod sections; 6) Cooling filter rod sections were combined with acetate fiber sections in a length ratio of 7:18 to prepare cigarettes, the cooling sections were close to the cut, and the acetate fiber rods were also prepared with cigarettes of the same specifications as the control. . Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the results are shown in Table 2. At the same time, the two types of cigarettes smoked were evaluated, and the results are shown in Table 3.

Example 6

In this example, the testing process included the following steps:

1) 60 parts by mass of 100-150 mesh grapefruit peel powder, 40 parts by mass of carbon powder, 20 parts by mass of modified starch, 20 parts by mass of microcrystalline cellulose and 10 parts by mass of lactose are taken, mixed uniformly and then added to water. 25 mass parts were sprayed, followed by uniform mixing to prepare a mixed soft material; 2) The mixed soft material was granulated by extrusion rounding, dried and sieved, and 20-50 mesh cooled particle cores were taken for later use; 3) PEG3000, palmitic acid and stearate-isopropanol ester in a mass ratio of 1:1:1 were melted by heating, and mixed completely and uniformly with coffee flavor in a mass ratio of 100:2 to obtain a mixed liquid; 4) The obtained cooling particle cores were coated with mixed liquid in an amount of 15% of the mass of cooling particles, followed by sieving, and 20-40 mesh cooling particles were taken; 5) The obtained cooled particles were continuously molded by microwave into a loose, porous cylinder with a circumference of 23.5 mm, and the cylinder was cut into 120 mm long cooled filter rod sections; 6) Cooling filter rod sections were combined with hollow tube sections of paper in a length ratio of 10:15 to prepare low temperature cigarettes, the cooling sections were close to the cutting edge, and acetate fiber rods were used to prepare low temperature cigarettes with the same specifications as the control. was also prepared. Two types of filter rod cigarettes were smoked and the temperatures at the outlet ends of the filter rods were tested on the fifth smoke, and the results are shown in Table 2. At the same time, the two types of cigarettes smoked were evaluated, and the results are shown in Table 3.

Table 2 Temperature test results

Tests have shown that the cooling filter rod provided by the invention has a very pronounced cooling effect.

Table 3 Results of cigarette smoking assessment

It should be understood that the content illustrated by the above embodiments does not limit the scope of the present invention, but should be used simply to more clearly illustrate the present invention. Various equivalent modifications made to the present invention by those skilled in the art after reading the present invention all fall within the scope defined by the appended claims of this application.

Claims (12)

A cooling filter rod formed by cooling particles,
The cooling particle comprises a particle body and a shell coated on the particle body, the shell comprising a phase change material,
The phase change material includes at least one of PLA, polyethylene glycol, stearic acid, palmitic acid, paraffin, microcrystalline wax, EVA, pentaerythritol, stearate-isopropanol ester, and stearate-glycerol ester. road. 2. The method of claim 1, wherein the shell further comprises a flavor enhancer; The flavor enhancer includes flavor and/or tobacco extract; The mass ratio of said phase change material to said flavor enhancer is 100:(0.5-10). The cooling filter rod of claim 1, wherein the mass of the shell accounts for 0.5-30% of the total mass of the cooling particles. The method of claim 1, wherein the particle body comprises plant fiber powder and/or inorganic material powder; The plant fiber powder includes at least one of tobacco powder, corncob powder, rice husk powder, walnut shell powder, coconut shell powder, citrus peel powder, and grapefruit peel powder; The inorganic material powder includes at least one of calcium carbonate, carbon powder, ceramics, silica gel, and molecular sieves; The cooling filter rod of claim 1, wherein the particle body includes an auxiliary molding material, the auxiliary molding material comprising at least one of a binder, a wetting agent, and an excipient. The method of claim 1, wherein the particle body is obtained by thoroughly mixing base powder, hot melt adhesive powder, excipients, and water, granulating, drying, and sieving; The base powder includes at least one of plant materials, inorganic materials, and metal powder; The plant materials include at least one of tobacco raw materials, straw, peanut shells, bagasse, corn cobs, pericarp, and aromatic plants; The inorganic materials include at least one of carbon powder, clay, calcium carbonate, and silicon oxide; A cooling filter rod, wherein the metal powder includes at least one of iron powder, aluminum oxide, and copper powder. Cooling filter rod according to claim 1 , wherein the cooling particles have a diameter of 10 to 50 mesh. 6. The cooling filter rod according to any one of claims 1 to 5, wherein the effective porosity inside the cooling filter rod is 65-95%. The method of claim 6, wherein when the cooling particles are used for heat-not-burn cigarettes, the granules are extrusion rounding granules; A cooling filter rod, wherein the cooling particles are spherical and have a bulk density of 0.8 to 2.5 g/ml. 7. Cooling filter rod according to claim 6, wherein when the cooling particles are used for conventional cigarettes, the cooling particles are spherical or amorphous and have a bulk density of 0.4 to 1.6 g/ml. delete A cigarette comprising a cooling filter rod according to any one of claims 1 to 5. delete