CN113287781B

CN113287781B - Multi-layer structured smoke particle, preparation method and use method thereof

Info

Publication number: CN113287781B
Application number: CN202110703055.9A
Authority: CN
Inventors: 何沛; 刘春波; 蔡炳彪; 蒋卓芳; 司晓喜; 唐石云; 向能军; 韩莹; 张凤梅; 朱瑞芝; 刘志华
Original assignee: China Tobacco Yunnan Industrial Co Ltd
Current assignee: China Tobacco Yunnan Industrial Co Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2023-05-23
Anticipated expiration: 2041-06-24
Also published as: KR20230000392A; CN113287781A; JP7238064B2; JP2023004808A; KR102681463B1

Abstract

The invention belongs to the technical field of heating cigarettes, and particularly relates to a multi-layer structure smoke particle, a preparation method, a use method and application thereof. The smoking particles (1) comprise at least from inside to outside: an inner core layer (11), a smoke layer (12) and an envelope layer (13); the inner core layer (11) comprises micropores, mesopores and macropores, wherein the diameter of the micropores is smaller than 2nm, the diameter of the mesopores is 2-50 nm, and the diameter of the macropores is larger than 50nm; the smoke generating layer (12) comprises a solid substrate, a flavorant, and a smoke generating agent. The smoke particles with the multilayer structure adopt the porous material as the inner core, so that the problem of waste of the internal essence and the smoke agent which are caused by granulation of the traditional pure smoke material is solved; at the same time, by reasonable collocation of micropores, mesopores and macropores, condensation nuclei during smoke generation are provided, a conveying channel for vaporizing the condensation nuclei is unblocked, the re-adsorption effect is reduced, and the generated smoke quantity is improved.

Description

Multi-layer structured smoke particle, preparation method and use method thereof

Technical Field

The invention belongs to the technical field of heating cigarettes, and particularly relates to a multi-layer structure smoke particle, a preparation method, a use method and application thereof.

Background

With the improvement of living standard, people pay more attention to health problems of themselves, and in recent years, attention to smoking health problems is high. In order to meet the changing consumption demands, various novel tobacco products for replacing the traditional cigarettes are developed in various enterprises at home and abroad. Among these new growing tobacco products, electronic cigarettes and heating are of great significance.

The electronic cigarette is used as an electronic product in the expansion application of the tobacco industry, has the advantages that the smoking flavor variability is strong, the smoke flavor can be regulated and controlled at will by adjusting the components of tobacco tar, but as the smoke is mainly generated by an electronic atomizer, the taste, especially the thermal sensation, of the electronic cigarette still has a certain difference from the traditional cigarette which generates the smoke by heating, and the acceptance of old smokers is poor.

The heated cigarette is produced by heating the smoke core material section of the cigarette, and the produced smoke has good acceptance of taste. In recent years, under the efforts of various domestic large tobacco enterprises, novel heating products with particles as fuming substrates appear, but the particles have some defects, such as easy moisture absorption and blocking of the particles, and influence on fuming; the granular material has a certain adsorption effect on smoke, so that the smoke quantity is small.

The present invention has been made to solve the above problems.

Disclosure of Invention

The first aspect of the present invention provides a multi-layered structured smoking particle, the smoking particle 1 comprising, from the inside to the outside, at least: an inner core layer 11, a smoke layer 12 and an envelope layer 13;

the inner core layer 11 comprises micropores, mesopores and macropores, wherein the diameter of the micropores is smaller than 2nm, the diameter of the mesopores is 2-50 nm, and the diameter of the macropores is larger than 50nm;

the smoke generating layer 12 comprises a solid substrate, a flavorant, and a smoke generating agent.

Preferably, the specific surface area of the inner core layer 11 is 180-450m ² And/g. The reason for this is that: too small or too large a specific surface area of the inner core layer 11 results in a significant reduction in smoke generation. This is probably because, in this range, the pores are able to provide better condensation nuclei for the initial atomization, reducing the energy required for the initial atomization, which should act similarly to the addition of zeolite to the heated solution, preventing bumping.

Preferably, the specific surface area distribution of the micropores, mesopores and macropores is as follows: micropores/mesopores=1/1-1/2, mesopores/macropores=2/1-4/1. The reason for this is that: the too large specific surface area distribution of both micropores and macropores results in a reduction in the amount of smoke. Excessive micropores can disperse heat energy during heating, so that fuming is slower; too many macropores can increase the re-adsorption amount of the generated smoke (the generated gas-phase smoke is adsorbed by pores) and reduce the smoke generation amount. The whole fuming process starts from the condensation nucleus generated in the micropores, and the condensation nucleus is smoothly transmitted to the macroporous region through the mesopores. The effect of the macroporous region is mainly another aspect: (1) The inner core layer 11 has certain roughness, so that the fuming layer 12 can be well coated on the inner core layer 11; (2) The condensation nucleus is enabled to grow up rapidly after contacting with the smoke agent and the essence in the smoke layer 12, and penetrates through the smoke layer 12 in a violent breakthrough mode to form smoke.

The particle size of the inner core layer 11 is not specified herein, nor is the particle size of the final smoking particles 1. The major impact on smoke generation is the specific surface area and pore ratio distribution of the inner core layer. Preferably, the particle size of the core layer 11 is 20-40 mesh. Of course, other particle size ranges may be modified at a point larger or smaller than the particle size range when the smoke layer is supported, and the resulting particle size is not greatly different and slightly affects the smoke effect, but the deviation is not particularly large.

Preferably, the melting point of the coating layer 13 is not higher than 300 ℃ so as to be melted first when heated, and the release of smoke is hindered by too high a melting point. The material of the coating layer 13 is one or more of nontoxic and odorless polymer films such as sodium alginate, polylactic acid (PLA), polysaccharide and the like. The primary function of the coating layer 13 is to prevent the particles from absorbing water during storage and at the same time to prevent agglomeration between the particles.

Preferably, the inner core layer 11 is selected from one or both of a natural material and a synthetic material. The inner core layer 11 may be activated carbon, molecular sieve, modified natural ore material, or the like of a specific pore structure.

Preferably, the tiers of smoke 12 comprise at least one tier of secondary smoke, the solid substrate in two tiers of smoke adjacent to each other being the same or different, the flavorant in two tiers of smoke adjacent to each other being the same or different, the smoking agent in two tiers of smoke adjacent to each other being the same or different. The fuming agent is preferably one or both of glycerin and propylene glycol.

Preferably, the solid substrate is selected from: at least one of root, stem and leaf of powdered plant such as radix Puerariae, tobacco leaf, folium Menthae, tobacco stalk, and lignum Aquilariae Resinatum.

Preferably, the water content of the smoke generating layer 12 is 8-22%. The too low water content can cause the increase of production difficulty, is not easy to realize, and has no obvious improvement effect on the fuming effect of the particles; too high a water content can obviously reduce the smoke quantity, and simultaneously cause the phenomenon of mouth scalding of the smoke.

A second aspect of the invention provides a method of preparing the smoking particles of the first aspect, comprising the steps of:

(1) Preparation of the core layer 11: performing high-temperature degassing, reduced-pressure degassing or high-temperature reduced-pressure degassing on the core material to obtain a core layer 11;

(2) Load of the smoke layer 12: loading the prepared solid substrate, essence and spice and a fuming agent on the inner core layer 11 obtained in the step (1), and drying to obtain coarse particles;

if the smoke layer 12 includes more than one secondary smoke layer, repeating the step (2) until the number of layers is designed;

(3) Coating of the coating layer 13: and (3) dissolving the coating material in a solvent, and coating the coarse particles obtained in the step (2) by adopting a flowing spraying or rolling adhesion mode to obtain the fuming particles 1.

The purpose of degassing the core material is: removing volatile substances and preventing negative smell generated when heating.

The loading mode in the step (2) is determined according to the state of the prepared mixture, if the viscosity is too high, the mode of flowing spraying or rolling adhesion is adopted, and if the viscosity is low, the impregnation can be realized.

In step (3), the coating is not generally impregnated to prevent the components in the smoke layer 12 from re-dissolving and escaping.

Preferably, in the step (1), the high-temperature degassing temperature is 300 ℃ and above, the pressure of the reduced pressure degassing is 600mbar and below, and the treatment conditions of the high-temperature reduced pressure degassing are as follows: a temperature of 250 ℃ and above, a pressure of 800mbar and below;

the degassing time is not less than 30min;

the dosage of the coating material in the step (3) is preferably 0.5-2% of the total mass of the inner core layer 11 and the smoke layer 12, and excessive coating material can prevent smoke.

A third aspect of the invention provides a method of using the smoking particles of any one of the first aspects, the smoking particles 1 being used in a heated cigarette, cartridge or smoking article.

Preferably, the heating cigarette structure is the same as the cigarette structure of the granular smoke material which is common at present, and as shown in fig. 2, the heating cigarette structure sequentially comprises a sealing film 21, a smoke core material section 22, a hollow supporting section 23, a cooling section and a filter tip section 24; wherein the smoke generating core segments 22 fill the smoke generating particles 1.

Preferably, the smoking cavity and filter structure of the smoking article is as shown in figure 3, the smoking cavity is for containing the smoking particles 1, and the upper end of the smoking cavity is connected with a smoking article filter segment 34. When the smoking article adopts a circumferential heating mode (figure 3 a), the side wall of the smoking cavity is provided with a circumferential heating element 31. When the smoking set adopts a microwave heating mode (figure 3 c), the side wall of the smoking cavity is provided with a microwave generating element 33. When the smoking article adopts a central heating mode (figure 3 b), a central heating element 32 is arranged in the smoking cavity. After the smoking article heats the smoking particles 1, the smoke produced is drawn out by the smoking article filter segment 34.

Of course, the smoking particles 1 may also be incorporated into cartridges for use.

The fuming process of the fuming particles 1 is as follows: when the suction is performed, the heat transferred from the outside first melts or phase changes the coating layer 13 of the particles, so that the particles are broken; when heat energy enters the inner core layer 11, gas in micropores escapes to form condensation cores, and the condensation cores reach the surface macropores through mesoporous transmission; the condensation nucleus rapidly grows up after contacting with the smoke agent and essence in the smoke layer 12 at the macropores, and penetrates through the smoke layer 12 in a violent breakthrough mode to form smoke, and finally enters the mouth of a consumer through the filter tip section.

Compared with the prior art, the invention has the following beneficial effects:

1. the smoke particles with the multilayer structure adopt the porous material as the inner core, so that the problem of waste of the internal essence and the smoke agent which are caused by granulation of the traditional pure smoke material is solved; at the same time, by reasonable collocation of micropores, mesopores and macropores, condensation nuclei during smoke generation are provided, a conveying channel for vaporizing the condensation nuclei is unblocked, the re-adsorption effect is reduced, and the generated smoke quantity is improved.

2. The smoke layers of the smoke particles with the multi-layer structure are one or more layers, so that more selection space is provided for matching smoke tastes.

3. The outermost layer of the fuming particles with the multilayer structure is provided with the coating layer, so that the particles can be prevented from absorbing water in the storage process, and meanwhile, agglomeration among the particles can be prevented; when heating, the smoke can be melted or phase-changed, so that the smoke can be released smoothly.

Drawings

Fig. 1 is a schematic structural view of a multi-layered structured smoking article of the present invention;

fig. 2 is a schematic structural view of the heating of a smoking article incorporating the multilayer structure of the present invention;

fig. 3 is a schematic illustration of a smoke chamber and filter configuration in a particular smoking article for direct heating of multi-layered structured smoking particles of the present invention;

list of reference numerals:

1-smoke particles, 11-inner core layer, 12-smoke layer, 13-envelope layer, 21-sealing film, 22-smoke core material section, 23-hollow support section, 24-cooling section and filter section 24, 31-circumferential heating element, 32-central heating element, 33-microwave generating element, 34-smoking set filter section.

Detailed Description

The present invention will be further illustrated by the following examples, but is not limited to the examples. Experimental methods, in which specific conditions are not specified in examples, are generally available commercially according to conventional conditions as well as those described in handbooks, or according to general-purpose equipment, materials, reagents, etc. used under conditions suggested by manufacturers, unless otherwise specified. The raw materials required in the following examples and comparative examples are all commercially available.

In the following examples, the micropores were less than 2nm in diameter, the mesopores were 2 to 50nm in diameter, and the macropores were more than 50nm in diameter. The specific surface area was measured by a nitrogen adsorption method.

Example 1

The fuming particle of the embodiment has a three-layer structure and comprises an inner core layer 11, a fuming layer 12 and an envelope layer 13;

the inner core layer 11 is an active carbon material with the particle diameter of 20-40 meshes, and the specific surface area is 450m after being measured ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=1/1, mesopores/macropores=4/1.

The smoke generating layer 12 is a single layer comprising a solid substrate, a flavor and fragrance, and a smoke generating agent.

The solid base material is pulverized tobacco leaf, the essence and spice are mixed with peppermint essence and spice, and the fuming agent is glycerin.

The coating layer 13 is a sodium alginate film.

The preparation method of the multi-layer structure fuming particles comprises the following steps:

(1) Cleaning of the inner core layer 11: the selected activated carbon core material is degassed at a high temperature of 300 ℃, and the specific operation is as follows: in an oven, degassing for 30min, washing with water, and drying at 80deg.C;

(2) Load of the smoke layer 12: according to the mass ratio of 3:2:2, mixing and stirring the solid substrate, the essence and the smoke agent to obtain smoke slurry, loading the smoke slurry onto the inner core layer 11 in a rolling adhesion mode, and drying to reduce the moisture content to 8% to obtain coarse granular matters;

(3) Coating of the coating layer 13: dissolving sodium alginate in water, and coating the coarse granular material obtained in the step (2) in a flowing spraying mode; the coating amount of the sodium alginate is 0.5% of the total mass of the inner core layer and the fuming layer, and the fuming particles are obtained by drying at 80 ℃ for 0.5 h.

The fuming particles of this example were numbered as sample 1 and, after screening, the particle size was 10-24 mesh.

Example 2

the inner core layer 11 is a phosphorus-aluminum molecular sieve material with the particle size of 20-40 meshes, and the specific surface area is 250m after being measured ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=1/2, mesopores/macropores=2/1.

The solid substrate is radix Puerariae crushed into powder, the essence and spice are mixed ice blueberry flavor and spice, and the fumigant is propylene glycol.

The coating layer 13 is polylactic acid (PLA).

(1) Cleaning of the inner core layer 11: the selected phosphorus-aluminum molecular sieve core material is decompressed and degassed under the pressure of 600mbar for 50min, and then is dried after being washed with water;

(2) Load of the smoke layer 12: according to the mass ratio of 4:2:3, mixing and stirring the solid base material, the essence and the smoke agent to obtain smoke slurry, loading the smoke slurry onto the inner core layer 11 in a rolling adhesion mode, and drying to reduce the moisture content to 22% to obtain coarse particles;

(3) Coating of the coating layer 13: dissolving PLA in ethyl acetate, coating the coarse particles by adopting a flowing spraying mode, and drying at 80 ℃ for 0.5h to obtain fuming particles; PLA was used in an amount of 2% of the total mass of the inner core layer and the smoke layer.

The fuming particles of this example were numbered as sample 2 and, after screening, the particle size was 10-24 mesh.

Example 3

the inner core layer 11 is a modified montmorillonite material with particle size of 20-40 meshes, and has specific surface area of 180m ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=2/3, mesopores/macropores=4/1.

The solid base material is a mixture of mint leaves and tobacco stems which are crushed into powder, the essence and the spice are mixed coffee aroma essence and spice, the fumigant is a mixture of glycerin and propylene glycol, and the mass ratio of the glycerin to the propylene glycol is 1:1.

The coating layer 13 is a maltose film.

(1) Cleaning of the inner core layer 11: degassing the selected modified montmorillonite core material at a high temperature of 350 ℃ for 30min, washing with water and drying;

(2) Load of the smoke layer 12: according to the mass ratio of 5:3:2, mixing and stirring the solid substrate, the essence and the smoke agent to obtain smoke slurry, loading the smoke slurry onto the inner core layer 11 in a flowing and spraying mode, and drying to reduce the moisture content to 12%;

(3) Coating of the coating layer 13: dissolving maltose in a small amount of water, coating particles by adopting a rolling adhesion mode, and drying to obtain fuming particles; the coating amount is 1.5% of the total mass of the inner core layer and the fuming layer.

The fuming particles of this example were numbered as sample 3 and, after screening, the particle size was 10-24 mesh.

Example 4

the inner core layer 11 is an active carbon material with the particle diameter of 20-40 meshes and the specific surface area of 350m ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=3/4, mesopores/macropores=3/1.

The solid base material is pulverized radix Puerariae and lignum Aquilariae Resinatum, the essence and perfume is sweet orange flavor essence and perfume, and the fumigant is glycerol and propylene glycol mixture.

The coating layer 13 is a sodium alginate film.

(1) Cleaning of the inner core layer 11: degassing the selected activated carbon core material at 300 ℃ and 600mbar for 30min, washing with water and drying;

(2) Load of the smoke layer 12: loading the prepared solid substrate, essence and spice and a smoke agent on the inner core layer 11 in a flowing spraying mode, and drying to reduce the moisture content to 16%;

(3) Coating of the coating layer 13: dissolving sodium alginate in water, and coating particles by adopting a flowing spraying mode, and drying at 80 ℃ for 0.5h to obtain fuming particles; the coating amount is 1% of the total mass of the inner core layer and the fuming layer.

The fuming particles of this example were numbered as sample 4 and, after screening, the particle size was 10-24 mesh.

Example 5

The smoke particle of this embodiment has a four-layered structure, including an inner core layer 11, a smoke layer 12 divided into two layers, namely a smoke layer 121 and a smoke layer 122, and an envelope layer 13.

The inner core layer 11 is a modified bentonite material with the grain diameter of 20-40 meshesA material with a specific surface area of 220m ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=2/3, mesopores/macropores=3/1.

The smoke generating layer 12 is a mixture comprising two layers of solid substrate, essence and spice and smoke generating agent, namely a first smoke generating layer 121 and a second smoke generating layer 122.

The solid substrate of the secondary smoke layer 121 is peppermint leaf and agarwood crushed into powder. The solid substrate of the secondary tier 122 is tobacco leaf that is crushed into a powder. The essence and the spice are mixed with mint-flavored essence and spice. Glycerin was used for each of the smoking agents.

The coating layer 13 is polylactic acid (PLA).

(1) Cleaning of the inner core layer 11: the selected modified bentonite core material is decompressed and degassed under the pressure of 400mbar for 40min, and then is dried after being washed with water;

(2) Load of the smoke layer 12: the prepared mixture of the two solid substrates, the essence and the perfume and the smoke agent is loaded on the inner core layer 11 twice in a rolling adhesion mode, and then the mixture is dried to reduce the moisture content to 18 percent.

(3) Coating of the coating layer 13: dissolving PLA in ethyl acetate, and coating particles by adopting a flowing spraying mode, and drying at 80 ℃ for 0.5h to obtain fuming particles; the PLA cladding amount is 1% of the total mass of the inner core layer and the fuming layer.

The fuming particles of this example were numbered as sample 5 and, after screening, the particle size was 10-24 mesh.

Application example 1

The particles produced by the conventional production method (i.e., particles prepared purely from the material of the smoke layer 12) were used as control samples corresponding to the samples in the above five examples, respectively, and the particle diameters in the control samples and the examples were kept substantially the same, and the control samples were numbered 0-1,0-2,0-3,0-4, and 0-5, respectively, wherein 0-5 was obtained by mixing the smoke materials of the smoke layer 121 and the smoke layer 122 according to a mass ratio of 1:1 and granulating.

1. The caking of 10 particle samples after 48h of standing in an 80% humidity environment was compared.

Observations find that: the caking phenomena of the control samples 0-1,0-2,0-3,0-4 and 0-5 occur to different degrees, while the samples 1, 2, 3, 4 and 5 in the examples do not agglomerate, which shows that the particles manufactured by the method of the invention can effectively prevent the caking phenomena under the high humidity environment.

2. Aspiration evaluation comparison

According to the enterprise standard QYNZY.J07.022-2015 novel cigarette sensory evaluation method of tobacco industry Limited liability company in Yunnan, sensory evaluation is carried out on cigarette cigarettes through a plurality of sensory evaluation staff, the residual quantity of the fuming agent in the particles after the smoking is detected, and the sensory merits of the fuming particles and the utilization rate of the fuming agent are inspected. Wherein, the scoring values of the sensory quality are respectively: the smoke amount is 0-10 minutes, and the aroma texture is 0-10 minutes, wherein the higher the score is, the stronger the evaluation index feel in the sucking process is.

The 10 sample smoke particles were added to a cigarette of currently common particulate smoke material (structure shown in figure 2) and smoked using a central heated smoking article. The results are shown in Table 1.

Table 1 results of sensory evaluation of different sample particles

As can be seen from table 1, the smoke particles manufactured by the invention have the remarkable characteristics of large smoke quantity, strong fragrance texture and high smoke agent utilization rate in the same cigarette.

3. Residual contrast of fuming agent

The above 0-1, 0-5 and 5 are representative, and 10 sample smoke particles are added into the smoke cavity of special smoking set (shown in figure 3), and the smoke residue is detected, and the comparison result is shown in table 2.

Table 2 results of smoking agent residual comparison for two sets of sample particles under different heating modes

As can be seen from table 2, the smoke particles produced by the present invention have fewer residues than the particle smoke agent obtained by the common production method under three different heating methods, and the smoke particles produced by the present invention have higher smoke agent utilization rate.

Application example 2

The procedure of example 1 was used to prepare a smoking particle 1A with the only difference: the inner core layer 11 is made of active carbon material with particle size of 20-40 meshes, and the specific surface area is 800m ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=1/5, mesopores/macropores=1/1.

The procedure of example 2 was used to prepare a smoking particle 2A with the only difference: the inner core layer 11 is made of a phosphorus-aluminum molecular sieve material with the particle size of 20-40 meshes, and the specific surface area is 95m after being measured ² The specific surface area distribution of micropores, mesopores and macropores is as follows: micropores/mesopores=1/8, mesopores/macropores=6/1.

The above 2 sample smoking particles were added to a currently common cigarette of particulate smoking material (structure shown in figure 2) and smoked using a central heated smoking article and compared to the results of table 1, samples 1 and 2.

TABLE 3 results of sensory evaluation of different sample particles

As can be seen from table 1, the smoke particles manufactured by the invention have the remarkable characteristics of large smoke quantity, strong fragrance texture and high smoke agent utilization rate in the same cigarette. The above advantages are related to the specific surface area of the core layer and the ratio of micropores-mesopores-macropores.

Claims

1. A multi-layered structured smoking particle, characterized in that the smoking particle (1) comprises at least, from inside to outside: an inner core layer (11), a smoke layer (12) and an envelope layer (13);

the inner core layer (11) comprises micropores, mesopores and macropores, the diameter of the micropores is smaller than 2nm, the diameter of the mesopores is 2-50 nm, the diameter of the macropores is larger than 50nm, and the distribution of the specific surface areas of the micropores, the mesopores and the macropores is as follows: micropores/mesopores=1/1-1/2, mesopores/macropores=2/1-4/1;

the smoke generating layer (12) comprises a solid substrate, a flavour and a smoke generating agent;

the specific surface area of the inner core layer (11) is 180-450m ² /g; the melting point of the coating layer (13) is not higher than 300 ℃; the inner core layer (11) is selected from one or two of natural materials and synthetic materials;

the coating layer (13) is made of one or more of sodium alginate, polylactic acid (PLA) and polysaccharide.

2. The multi-layered structured smoking particle according to claim 1, wherein the smoke generating layer (12) comprises at least one layer of smoke generating layers, wherein the solid substrate in two adjacent layers of smoke generating layers is the same or different, wherein the flavorant in two adjacent layers of smoke generating layers is the same or different, and wherein the smoking agent in two adjacent layers of smoke generating layers is the same or different.

3. The multi-layered structured smoking particle of claim 1, wherein the solid substrate is selected from the group consisting of: at least one of the roots, stems and leaves of the plant in powder form.

4. A method of preparing a smoking particle according to any one of claims 1 to 3, comprising the steps of:

step 1: preparation of the core layer (11): carrying out high-temperature degassing, reduced-pressure degassing or high-temperature reduced-pressure degassing on the inner core material to obtain an inner core layer (11), wherein the inner core layer (11) comprises micropores, mesopores and macropores, the diameter of the micropores is smaller than 2nm, the diameter of the mesopores is 2-50 nm, and the diameter of the macropores is larger than 50nm;

step 2: load of the smoke layer (12): loading the prepared solid substrate, essence and spice and a fuming agent on the inner core layer (11) obtained in the step 1, and drying to obtain coarse particles;

step 3: coating of the coating layer (13): and (3) dissolving the coating material in a solvent, and coating the coarse particles obtained in the step (2) by adopting a flowing spraying or rolling adhesion mode to obtain the fuming particles (1).

5. The method for producing a smoking article according to claim 4, wherein in step 1, the high-temperature degassing is performed at a temperature of 300 ℃ and above, the pressure of the reduced pressure degassing is 600mbar and below, and the conditions for the high-temperature reduced pressure degassing are: a temperature of 250 ℃ and above, a pressure of 800mbar and below;

the degassing time is not less than 30min;

the coating amount of the coating material in the step 3 is 0.5-2% of the total mass of the inner core layer (11) and the fuming layer (12).

6. A method of using the smoking particles of any one of claims 1 to 3, wherein the smoking particles (1) are placed in a heated cigarette, cartridge or smoking article.

7. Use of a smoking particle according to any of claims 1 to 3, wherein the smoking particle (1) is capable of increasing smoke volume and smoke usage.