Solid blasting bead as well as preparation method and application thereof

Abstract

The invention provides a solid-state blasting bead as well as a preparation method and application thereof. The solid-state blasting bead comprises an inner core and a coating layer coating the inner core, the inner core comprises the following components: tar-reducing particles, tobacco powder, perfume, a diluent and a lubricant; the coating layer comprises the following components: modified polylactic acid, a film-forming agent and a plasticizer. When the solid-state blasting bead is applied to smoking of cigarette products, the inner core and the coating layer components cooperate to purify smoke, excellent oxidation resistance is exerted, tar reduction and aroma enhancement are achieved, and acceptability of a user to low-tar cigarette products is improved. Tar reducing particles in the inner core can selectively adsorb harmful substances such as phenol and ammonia in smoke, aroma components in tar are reserved as much as possible, the tar content is reduced, and meanwhile the stability of the aroma and taste of the cigarette is guaranteed; the modified polylactic acid in the coating layer has excellent oxidation resistance, effectively removes free radicals in smoke, reduces the influence of smoking on health, softens the smoke, reduces offensive odor, reduces irritation and improves the smoking taste.

Description

Technical Field

[0001] This invention belongs to the field of cigarette manufacturing technology, specifically relating to a solid flavor capsule, its preparation method, and its application. Background Technology

[0002] Tar is a byproduct of incomplete combustion during cigarette smoking, comprising an extremely complex mixture of hydrocarbons, hydrocarbon oxides, sulfides, and nitrogen compounds. It contains numerous carcinogens such as benzo[a]pyrene, cadmium, arsenic, β-naphthylamine, nitrosamines, and radioactive isotopes, as well as cancer-promoting substances like phenols and fumaric acid. Although present in trace amounts, these substances accumulate frequently, repeatedly, and over a long period. Regarding the reduction of cigarette tar, existing low-tar cigarette products generally suffer from excessively high smoke filtration efficiency and excessively high ventilation dilution, resulting in low smoke concentration, insufficient aroma, and poor flavor richness.

[0003] CN101966011A discloses a method for reducing tar and enhancing aroma in cigarette filter rods. The multi-component composite filter rod includes two or three cellulose acetate filter segments, each wrapped with a forming paper, which in turn is wrapped with tipping paper. Cavities are provided between the cellulose acetate filter segments. The forming paper wrapping the filter segments has a grooved design and is coated with flavoring at a ratio of 0.01-3%. The tipping paper has small holes. Its complex structure, while adsorbing cigarette smoke, also introduces impurities and alters the smoking experience, limiting its practical application in production.

[0004] CN105996124A discloses a cigarette filter rod with tar-reducing and aroma-enhancing properties, prepared from the following raw materials in parts by weight: 5.6-7 parts calcium stearate, 82-92 parts polypropylene resin, 2.5-3 parts polyvinyl alcohol, 0.6-1 parts dibenzyl sorbitol, 6.8-8 parts silica gel, 3.5-4 parts activated carbon, 28-35 parts tobacco straw, 2.8-3.2 parts sodium alginate, and an appropriate amount of deionized water. Its tar-reducing and harm-reducing effects are not significant, and its impact on cigarette aroma cannot be guaranteed.

[0005] Therefore, there is an urgent need to break through the technical bottleneck of reducing the aroma of cigarettes due to the reduction of harm and tar, and to develop a simple and easy-to-use product that reduces tar and enhances aroma. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a solid flavor capsule, its preparation method, and its application. The solid flavor capsule of the present invention can purify smoke, exhibit excellent antioxidant properties, reduce tar and enhance aroma, and improve users' acceptance of low-tar cigarette products.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a solid burst bead, the solid burst bead comprising a core and a coating layer covering the core;

[0009] The core components include tar-reducing particles, tobacco powder, flavoring, diluent, and lubricant;

[0010] The coating layer comprises modified polylactic acid, a film-forming agent, and a plasticizer.

[0011] The core's tar-reducing particles selectively adsorb harmful substances such as phenol and ammonia in cigarette smoke, preserving as much of the aroma components as possible from the tar. This reduces tar content while maintaining the stability of the cigarette's aroma and flavor. The modified polylactic acid in the coating layer possesses excellent antioxidant properties, effectively scavenging free radicals in the smoke, mitigating the health effects of smoking, while also softening the smoke, reducing impurities, decreasing irritation, and improving the smoking experience. When solid flavor capsules are applied to cigarette products, the core and coating components work synergistically to purify the smoke, demonstrating excellent antioxidant properties and a significant tar-reducing and aroma-enhancing effect, thus increasing user acceptance of low-tar cigarette products.

[0012] The tobacco powder includes, but is not limited to, tobacco powder obtained by pulverizing Yunnan tobacco leaves, Henan tobacco leaves, or Zimbabwean tobacco leaves after roasting; the flavoring includes, but is not limited to, natural or synthetic flavorings with floral, caramel, sweet, roasted, or fruity aromas. The core of this invention uses the auxiliary addition of tobacco powder and flavorings to enhance the natural aroma characteristics and richness of the tobacco flavor, while the types of tobacco powder and flavorings do not affect the tar-reducing and aroma-enhancing effects of the solid flavor capsule, and can be adjusted according to user preferences.

[0013] Preferably, the mass ratio of the core to the coating layer is (4-10):(1-3).

[0014] The specific point values ​​in (4-10) can be 4, 4.2, 4.5, 4.7, 5, 5.3, 5.5, 5.8, 6, 6.5, 7, 8, 9 or 10, etc.

[0015] The specific point values ​​in (1-3) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8 or 3, etc.

[0016] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0017] Preferably, the core components include, by weight, 10-20 parts of tar-reducing particles, 5-15 parts of tobacco powder, 1-5 parts of flavoring, 1-5 parts of diluent, and 0.5-1.5 parts of lubricant.

[0018] The weight percentage of the coke-reducing particles can be 10, 11.2, 12.5, 13.7, 14, 15.3, 16.5, 17.8, 18, 19, or 20 parts, etc.

[0019] The weight percentage of the tobacco powder can be 5 parts, 6.2 parts, 7.5 parts, 8.7 parts, 9 parts, 10.3 parts, 11.5 parts, 12.8 parts, 13 parts, 14 parts, or 15 parts, etc.

[0020] The weight percentage of the spices can be 1 part, 1.2 parts, 1.5 parts, 1.7 parts, 2 parts, 2.3 parts, 2.5 parts, 2.8 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts, etc.

[0021] The diluent can be expressed in parts by weight of 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 3.5, 4, 4.5, or 5 parts, etc.

[0022] The weight percentage of the lubricant can be 0.5 parts, 0.62 parts, 0.75 parts, 0.87 parts, 0.9 parts, 1 part, 1.23 parts, 1.35 parts, 1.48 parts, or 1.5 parts, etc.

[0023] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0024] Preferably, the coating layer comprises, by weight, 1-3 parts modified polylactic acid, 0.1-1 parts film-forming agent, and 0.1-1 parts plasticizer.

[0025] The modified polylactic acid can be expressed in parts by weight of 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, or 3 parts, etc.

[0026] The film-forming agent can be present in weight parts of 0.1, 0.22, 0.35, 0.47, 0.5, 0.63, 0.75, 0.88, 0.9, or 1 part, etc.

[0027] The plasticizer can be present in parts by weight of 0.1, 0.22, 0.35, 0.47, 0.5, 0.63, 0.75, 0.88, 0.9, or 1 part, etc.

[0028] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0029] Preferably, the coke-reducing particles are prepared by a method comprising the following steps:

[0030] (1) The plant powder was carbonized and then mixed with an aqueous solution of metal ions containing a surface modifier. After the first ultrasonic treatment, it was mixed with thiourea and then subjected to a second ultrasonic treatment. The reaction was carried out, and the solid and liquid were separated to obtain modified biochar.

[0031] (2) The modified biochar is mixed with an aqueous solution containing an encapsulating agent, the solid and liquid are separated, and the mixture is dried to obtain the coke-reducing particles.

[0032] This invention employs a temperature-responsive encapsulating agent to coat modified biochar. When the solid capsules are applied to cigarette products for smoking, the encapsulating agent melts as the temperature rises, fully exposing the pores of the modified activated carbon. The surface of the modified biochar is loaded with a large number of sulfur atoms, nitrogen atoms, hydroxyl groups, and metal ions, enabling efficient adsorption of harmful substances such as phenol and ammonia in cigarette smoke, thereby achieving tar reduction and aroma enhancement. The surface modifier provides hydroxyl groups, and thiourea provides sulfur and nitrogen atoms.

[0033] The plant powder includes, but is not limited to, walnut shells, corn stalks, corn cobs, wheat straw, rice straw, reed straw, sugarcane bagasse, or fruit peels that have been dried and then pulverized. The type of plant powder does not affect the adsorption performance of the modified activated carbon.

[0034] Preferably, the carbonization temperature is 300-500℃, for example, 300℃, 320℃, 350℃, 370℃, 400℃, 430℃, 450℃, 480℃ or 500℃; the time is 1-3h, for example, 1h, 1.2h, 1.5h, 1.7h, 2h, 2.3h, 2.5h, 2.8h or 3h.

[0035] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0036] Preferably, the carbonization process further includes washing and drying steps.

[0037] Preferably, the ratio of plant powder to surface modifier is (3-7) g:(0.01-0.08) mol.

[0038] The specific point values ​​in (3-7) can be 3, 3.2, 3.5, 3.7, 4, 4.3, 4.5, 4.8, 5, 5.5, 6, 6.5 or 7, etc.

[0039] The specific point values ​​in (0.01-0.08) can be 0.01, 0.012, 0.015, 0.017, 0.02, 0.023, 0.025, 0.028, 0.03, 0.035, 0.04, 0.05, 0.06, 0.07, or 0.08, etc.

[0040] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0041] Preferably, the surface modifier comprises any one or a combination of at least two of polyethylene glycol, polyvinyl alcohol, glycerin, or cyclodextrin.

[0042] Surface modifiers are used to provide hydroxyl groups. Activated carbon surfaces are loaded with a large number of hydroxyl groups, which form hydrogen bonds with phenol, thereby purifying flue gas.

[0043] Preferably, the surface modifier includes polyethylene glycol, polyvinyl alcohol, and glycerin.

[0044] The present invention preferably uses polyethylene glycol, polyvinyl alcohol and glycerol together to provide hydroxyl groups loaded on the surface of activated carbon, which has a better selective adsorption effect on flue gas tar.

[0045] Preferably, the molar ratio of polyethylene glycol, polyvinyl alcohol and glycerin is (1-10):(1-8):(1-5).

[0046] The specific point values ​​in (1-10) can be 1, 2.2, 3.5, 4.7, 5, 6.3, 7.5, 8.8, 9 or 10, etc.

[0047] The specific point values ​​in (1-8) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7 or 8, etc.

[0048] The specific point values ​​in (1-5) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 3.5, 4, 4.5 or 5, etc.

[0049] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0050] Preferably, the ratio of plant powder to metal ions is (3-7) g:(0.01-0.05) mol.

[0051] The specific point values ​​in (3-7) can be 3, 3.2, 3.5, 3.7, 4, 4.3, 4.5, 4.8, 5, 5.5, 6, 6.5 or 7, etc.

[0052] The specific point values ​​in (0.01-0.05) can be 0.01, 0.012, 0.015, 0.017, 0.02, 0.023, 0.025, 0.028, 0.03, 0.035, 0.04, 0.045 or 0.05, etc.

[0053] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0054] Preferably, the metal ions include any one or a combination of at least two of calcium ions, magnesium ions, copper ions, ferric ions, or zinc ions.

[0055] Activated carbon has a large number of metal ions loaded on its surface, which complex with ammonia, thereby purifying the flue gas.

[0056] Preferably, the metal ions include calcium ions, magnesium ions, and copper ions.

[0057] The present invention preferably uses calcium ions, magnesium ions and copper ions to be loaded on the surface of activated carbon, which has a better selective adsorption effect on flue gas tar.

[0058] Preferably, the molar ratio of calcium ions, magnesium ions and copper ions is (1-10):(1-10):(1-10).

[0059] The specific point values ​​in the first (1-10) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0060] The specific point values ​​in the second (1-10) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0061] The specific point values ​​in the third (1-10) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0062] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0063] Preferably, the temperature of the first ultrasound is 70-90℃, for example, 70℃, 72℃, 75℃, 77℃, 80℃, 83℃, 85℃, 88℃ or 90℃; the time is 20-40min, for example, 20min, 22min, 25min, 27min, 30min, 33min, 35min, 38min or 40min.

[0064] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0065] Preferably, the ratio of the plant powder to thiourea is (3-7) g:(0.03-0.1) mol.

[0066] The specific point values ​​in (3-7) can be 3, 3.2, 3.5, 3.7, 4, 4.3, 4.5, 4.8, 5, 5.5, 6, 6.5 or 7, etc.

[0067] The specific point values ​​in (0.03-0.1) can be 0.03, 0.032, 0.035, 0.037, 0.04, 0.043, 0.045, 0.048, 0.05, 0.055, 0.06, 0.07, 0.08, 0.09 or 0.1, etc.

[0068] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0069] Preferably, the temperature of the second ultrasound is 70-90℃, for example, 70℃, 72℃, 75℃, 77℃, 80℃, 83℃, 85℃, 88℃ or 90℃; the time is 0.5-1.5h, for example, 0.5h, 0.62h, 0.75h, 0.87h, 0.9h, 1.03h, 1.15h, 1.28h, 1.3h, 1.4h or 1.5h.

[0070] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0071] Preferably, the reaction temperature is 140-160℃, for example, 140℃, 142℃, 145℃, 147℃, 150℃, 153℃, 155℃, 158℃ or 160℃; the time is 5-7h, for example, 5h, 5.2h, 5.5h, 5.7h, 6h, 6.3h, 6.5h, 6.8h or 7h.

[0072] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0073] Preferably, in step (1), the solid-liquid separation method is filtration.

[0074] Preferably, in step (1), the solid-liquid separation is followed by a drying step.

[0075] Preferably, the mass ratio of the modified biochar to the encapsulating agent is (20-50):(10-30).

[0076] The specific point values ​​in (20-50) can be 20, 22, 25, 27, 30, 35, 38, 40, 45 or 50, etc.

[0077] The specific point values ​​in (10-30) can be 10, 12, 15, 17, 20, 23, 25, 28 or 30, etc.

[0078] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0079] Preferably, the embedding agent comprises any one or a combination of at least two of agar, paraffin, or gelatin.

[0080] Preferably, in step (2), the mixing temperature is 90-120℃, for example, 90℃, 92℃, 95℃, 97℃, 100℃, 103℃, 105℃, 108℃, 110℃, 115℃ or 120℃; the time is 20-40min, for example, 20min, 22min, 25min, 27min, 30min, 33min, 35min, 38min or 40min.

[0081] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0082] Preferably, in step (2), the mixing method is stirring.

[0083] Preferably, in step (2), the solid-liquid separation method is filtration.

[0084] Preferably, in step (2), the drying method is freeze drying.

[0085] Preferably, the modified polylactic acid is prepared by a method comprising the following steps:

[0086] Polylactic acid is mixed with an organic solution containing nano-polymer materials, dissolved by ultrasonication, and then mixed with vegetable oil, cured, and dried to obtain the modified polylactic acid.

[0087] This invention uses nano-polymer materials and vegetable oils to adjust the network structure of polylactic acid, which can enhance the antioxidant properties of polylactic acid, effectively remove free radicals in smoke, soften the smoke, reduce impurities, reduce irritation, and improve the smoking experience.

[0088] Preferably, the mass ratio of polylactic acid to nanopolymer material is (1-3):(0.1-1).

[0089] The specific point values ​​in (1-3) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8 or 3, etc.

[0090] The specific point values ​​in (0.1-1) can be 0.1, 0.22, 0.35, 0.47, 0.5, 0.63, 0.75, 0.88, 0.9 or 1, etc.

[0091] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0092] Preferably, the nanopolymer material includes any one or a combination of at least two of nanocellulose, nanolignin, or nanochitin.

[0093] Preferably, the nanopolymer material includes nanocellulose, nanolignin, and nanochitin.

[0094] The present invention preferably modifies polylactic acid with nanocellulose, nanolignin and nanochitin to improve its antioxidant properties.

[0095] Preferably, the mass ratio of the nanocellulose, nanolignin and nanochitin is (1-10):(1-8):(1-3).

[0096] The specific point values ​​in (1-10) can be 1, 2.2, 3.5, 4.7, 5, 6.3, 7.5, 8.8, 9 or 10, etc.

[0097] The specific point values ​​in (1-8) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7 or 8, etc.

[0098] The specific point values ​​in (1-3) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8 or 3, etc.

[0099] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0100] Preferably, the organic solution comprises any one or a combination of at least two of chloroform, dichloromethane, chloroform, acetone or ethyl acetate.

[0101] Preferably, the mass ratio of polylactic acid to vegetable oil is (1-3):(1-3).

[0102] The specific point values ​​in the first (1-3) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8 or 3, etc.

[0103] The specific point values ​​in the second (1-3) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8 or 3, etc.

[0104] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0105] Preferably, the vegetable oil includes any one or a combination of at least two of camellia oil, coconut oil, or perilla seed oil.

[0106] Preferably, the vegetable oil includes camellia oil, coconut oil, and perilla seed oil.

[0107] This invention preferably uses camellia oil, coconut oil, and perilla seed oil to modify polylactic acid, resulting in better antioxidant properties.

[0108] Preferably, the mass ratio of camellia oil, coconut oil and perilla seed oil is (1-9):(1-8):(1-5).

[0109] The specific point values ​​in (1-9) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7, 8 or 9, etc.

[0110] The specific point values ​​in (1-8) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 4, 5, 6, 7 or 8, etc.

[0111] The specific point values ​​in (1-5) can be 1, 1.2, 1.5, 1.7, 2, 2.3, 2.5, 2.8, 3, 3.5, 4, 4.5 or 5, etc.

[0112] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0113] Preferably, the temperature for mixing with the vegetable oil is 50-70°C, for example, 50°C, 52°C, 55°C, 57°C, 60°C, 63°C, 65°C, 68°C, or 70°C; and the time is 0.5-1.5 hours, for example, 0.5 hours, 0.62 hours, 0.75 hours, 0.87 hours, 0.9 hours, 1.03 hours, 1.15 hours, 1.28 hours, 1.3 hours, 1.4 hours, or 1.5 hours.

[0114] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0115] Preferably, the curing temperature is 25-35℃, for example, 25℃, 26.2℃, 27.5℃, 25.7℃, 29℃, 30.3℃, 31.5℃, 32.8℃, 33℃, 34℃ or 35℃; the curing time is 20-28h, for example, 20h, 21.2h, 22.5h, 23.7h, 24h, 25.3h, 26.5h, 27.8h or 28h.

[0116] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0117] Preferably, the drying temperature is 60-80℃, for example, 60℃, 62℃, 65℃, 67℃, 70℃, 73℃, 75℃, 78℃ or 80℃; the drying time is 10-14h, for example, 10h, 10.2h, 10.5h, 10.7h, 11h, 11.3h, 11.5h, 11.8h, 12h, 13h or 14h.

[0118] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0119] Preferably, the diluent comprises any one or a combination of at least two of the following: plant powder, lactose, microcrystalline cellulose, calcium bicarbonate, mannitol, fructose, sorbitol, or sucrose.

[0120] The plant powder includes, but is not limited to, walnut shells, corn stalks, corn cobs, wheat straw, rice straw, reed stalks, sugarcane bagasse, or fruit peels that have been dried and then pulverized. The diluent can be a plant powder identical to the biochar raw material, with both complementing each other to enhance the plant aroma in the flue gas; alternatively, it can be different from the biochar raw material, adjusting the plant aroma type according to user preference.

[0121] Preferably, the lubricant comprises any one or a combination of at least two of magnesium stearate, calcium stearate, zinc stearate, red ochre powder, talc, magnesium lauryl sulfate, glyceryl monostearate, glyceryl palmitate stearate, sodium lauryl sulfate, or sodium stearate fumarate.

[0122] Preferably, the film-forming agent comprises any one or a combination of at least two of hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone, pullulan, or gum arabic.

[0123] Preferably, the plasticizer comprises any one or a combination of at least two of the following: tributyl citrate, acetylated tributyl citrate, trihexyl citrate, acetylated trihexyl citrate, butyryl trihexyl citrate, trioctyl citrate, acetylated trioctyl citrate, or triacetin.

[0124] In a second aspect, the present invention provides a method for preparing solid burst beads as described in the first aspect, the method comprising:

[0125] The tar-reducing particles, tobacco powder, flavoring, diluent and lubricant are mixed to prepare dry particles; modified polylactic acid, film-forming agent, plasticizer and organic solvent are mixed and sprayed onto the surface of the dry particles, and dried to obtain the solid burst beads.

[0126] Preferably, the organic solvent includes any one or a combination of at least two of ethanol, methanol, acetone, dichloromethane, or ethyl acetate.

[0127] Thirdly, the present invention provides the application of solid flavoring beads as described in the first aspect in the preparation of cigarette filter rods.

[0128] The solid flavor capsules provided by this invention can be added to cigarette filters. When smoking cigarettes, they can be crushed or not crushed, exhibiting excellent antioxidant properties and significant tar reduction and aroma enhancement effects, thereby increasing users' acceptance of low-tar cigarette products.

[0129] Compared with the prior art, the present invention has the following beneficial effects:

[0130] When the solid flavor capsules of this invention are applied to cigarette products for smoking, the core and coating components work synergistically to purify the smoke, exhibiting excellent antioxidant properties and significant tar reduction and aroma enhancement effects, thereby increasing users' acceptance of low-tar cigarette products. The tar-reducing particles in the core can selectively adsorb harmful substances such as phenol and ammonia in the smoke, preserving as much of the aroma components in the tar as possible, thus ensuring the stability of the cigarette's aroma and flavor while reducing tar content. The modified polylactic acid in the coating layer has excellent antioxidant properties, effectively removing free radicals in the smoke, reducing the health effects of smoking, while also softening the smoke, reducing impurities, decreasing irritation, and improving the smoking experience. Detailed Implementation

[0131] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0132] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with the techniques or conditions described in the literature in this field, or in accordance with the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels.

[0133] The sources of materials used in the following specific embodiments are as follows:

[0134]

[0135]

[0136] Preparation Example 1

[0137] This preparation example provides a coke-reducing granule, which is prepared by a method including the following steps:

[0138] (1) After washing, drying, and pulverizing the dragon fruit peel, dragon fruit peel powder was obtained. 5g of dragon fruit peel powder was carbonized at 400℃ for 2h, washed with water 4 times, and dried at 80℃. Then, an aqueous solution containing 0.03mol polyethylene glycol, 0.02mol polyvinyl alcohol, 0.01mol glycerol, 0.01mol calcium ions, 0.01mol magnesium ions, and 0.01mol copper ions was added, and the mixture was sonicated at 80℃ for 30min. Then, 0.06mol thiourea was added, and the mixture was sonicated at 80℃ for 1h, then reacted at 150℃ for 6h, filtered, and dried at 80℃ for 24h to obtain modified biochar.

[0139] (2) 30g of modified biochar was mixed with an aqueous solution containing 15g of agar, stirred at 100℃ for 30min, filtered, and freeze-dried to obtain the coke-reducing granules.

[0140] Preparation Example 2

[0141] This preparation example provides a coke-reducing granule, which is prepared by a method including the following steps:

[0142] (1) Walnut shells were washed, dried, and pulverized to obtain walnut shell powder. 7g of walnut shell powder was carbonized at 500℃ for 1h, washed four times with water, and dried at 80℃. Then, an aqueous solution containing 0.02mol polyethylene glycol, 0.04mol polyvinyl alcohol, 0.02mol glycerol, 0.02mol calcium ions, 0.01mol magnesium ions, and 0.02mol copper ions was added, and the mixture was sonicated at 70℃ for 40min. Then, 0.1mol thiourea was added, and the mixture was sonicated at 90℃ for 0.5h, then reacted at 140℃ for 7h, filtered, and dried at 80℃ for 24h to obtain modified biochar.

[0143] (2) 50g of modified biochar was mixed with an aqueous solution containing 30g of paraffin, stirred at 120℃ for 20min, filtered, and freeze-dried to obtain the coke-reducing particles.

[0144] Preparation Example 3

[0145] This preparation example provides a coke-reducing granule, which is prepared by a method including the following steps:

[0146] (1) Corn stalks were washed, dried, and crushed to obtain corn stalk powder. 3g of corn stalk powder was carbonized at 300℃ for 3h, washed with water 4 times, and dried at 80℃. Then, an aqueous solution containing 0.004mol polyethylene glycol, 0.004mol polyvinyl alcohol, 0.002mol glycerol, 0.004mol calcium ions, 0.003mol magnesium ions, and 0.003mol copper ions was added, and the mixture was sonicated at 90℃ for 20min. Then, 0.03mol thiourea was added, and the mixture was sonicated at 70℃ for 1.5h, then reacted at 160℃ for 5h, filtered, and dried at 80℃ for 24h to obtain modified biochar.

[0147] (2) 20g of modified biochar was mixed with an aqueous solution containing 10g of gelatin, stirred at 90℃ for 40min, filtered, and freeze-dried to obtain the coke-reducing particles.

[0148] Preparation Example 4

[0149] This preparation example provides a coke-reducing granule, which differs from Preparation Example 1 only in that: polyethylene glycol is not added in step (1), and its reduction is proportionally allocated to polyvinyl alcohol and glycerin, while the remaining steps and raw materials remain unchanged.

[0150] Preparation Example 5

[0151] This preparation example provides a coke-reducing granule, which differs from Preparation Example 1 only in that: polyvinyl alcohol is not added in step (1), and its reduction is proportionally allocated to polyethylene glycol and glycerin, while the remaining steps and raw materials remain unchanged.

[0152] Preparation Example 6

[0153] This preparation example provides a coke-reducing granule, which differs from Preparation Example 1 only in that: glycerol is not added in step (1), and its reduction is proportionally allocated to polyethylene glycol and polyvinyl alcohol, while the remaining steps and raw materials remain unchanged.

[0154] Preparation Example 7

[0155] This preparation example provides a coke-reducing granule, which differs from preparation example 1 only in that: calcium ions are not added in step (1), and the reduction is proportionally allocated to magnesium ions and copper ions, while the remaining steps and raw materials remain unchanged.

[0156] Preparation Example 8

[0157] This preparation example provides a coke-reducing granule, which differs from preparation example 1 only in that: magnesium ions are not added in step (1), and the reduction is proportionally allocated to calcium ions and copper ions, while the remaining steps and raw materials remain unchanged.

[0158] Preparation Example 9

[0159] This preparation example provides a coke-reducing granule, which differs from preparation example 1 only in that: no copper ions are added in step (1), and the reduction is proportionally allocated to calcium ions and magnesium ions, while the remaining steps and raw materials remain unchanged.

[0160] Preparation Example 10

[0161] This preparation example provides a coke-reducing particle, which differs from preparation example 1 only in that: in step (1), “copper ions” are replaced with an equimolar amount of “trivalent iron ions”, while the other steps and raw materials remain unchanged.

[0162] Preparation Example 11

[0163] This preparation example provides a modified polylactic acid, which is prepared by a method comprising the following steps:

[0164] 2g of polylactic acid was mixed with a chloroform solution containing 0.3g of nanocellulose, 0.1g of nanolignin and 0.1g of nanochitin. After ultrasonic dissolution, 0.7g of camellia oil, 0.8g of coconut oil and 0.5g of perilla seed oil were added. The mixture was mixed at 60℃ for 1h, then cured at 30℃ for 24h and dried at 70℃ for 12h to obtain the modified polylactic acid.

[0165] Preparation Example 12

[0166] This preparation example provides a modified polylactic acid, which is prepared by a method comprising the following steps:

[0167] 3g of polylactic acid was mixed with a dichloromethane solution containing 0.5g of nanocellulose, 0.2g of nanolignin and 0.3g of nanochitin. After ultrasonic dissolution, 1g of camellia oil, 1g of coconut oil and 1g of perilla seed oil were added. The mixture was stirred at 70℃ for 0.5h, then cured at 25℃ for 28h and dried at 60℃ for 14h to obtain the modified polylactic acid.

[0168] Preparation Example 13

[0169] This preparation example provides a modified polylactic acid, which is prepared by a method comprising the following steps:

[0170] 1g of polylactic acid was mixed with a chloroform solution containing 0.04g of nanocellulose, 0.03g of nanolignin and 0.03g of nanochitin. After ultrasonic dissolution, 0.4g of camellia oil, 0.3g of coconut oil and 0.3g of perilla seed oil were added. The mixture was mixed at 50℃ for 1.5h, then cured at 35℃ for 20h and dried at 80℃ for 10h to obtain the modified polylactic acid.

[0171] Preparation Example 14

[0172] This preparation example provides a modified polylactic acid, which differs from preparation example 11 only in that: no nanocellulose is added, and its reduced amount is proportionally allocated to nanolignin and nanochitin, while the other raw materials and steps remain unchanged.

[0173] Preparation Example 15

[0174] This preparation example provides a modified polylactic acid, which differs from preparation example 11 only in that: no nano-lignin is added, and its reduction is proportionally allocated to nano-cellulose and nano-chitin, while the other raw materials and steps remain unchanged.

[0175] Preparation Example 16

[0176] This preparation example provides a modified polylactic acid, which differs from preparation example 11 only in that: no nano-chitin is added, and its reduced amount is proportionally allocated to nano-cellulose and nano-lignin, while the other raw materials and steps remain unchanged.

[0177] Preparation Example 17

[0178] This preparation example provides a modified polylactic acid, which differs from Preparation Example 11 only in that: camellia oil is not added, and its reduced amount is proportionally allocated to coconut oil and perilla seed oil, while the other raw materials and steps remain unchanged.

[0179] Preparation Example 18

[0180] This preparation example provides a modified polylactic acid, which differs from preparation example 11 only in that: no coconut oil is added, and its reduced amount is proportionally allocated to camellia oil and perilla seed oil, while the other raw materials and steps remain unchanged.

[0181] Preparation Example 19

[0182] This preparation example provides a modified polylactic acid, which differs from preparation example 11 only in that: perilla seed oil is not added, and its reduced amount is proportionally allocated to camellia oil and coconut oil, while the other raw materials and steps remain unchanged.

[0183] Example 1

[0184] This embodiment provides a solid burst bead, the preparation method of which is as follows:

[0185] (1) By weight, 15 parts of the tar-reducing granules provided in Preparation Example 1, 10 parts of Yunnan tobacco powder, 3 parts of lemon flavoring, 2 parts of kudzu root powder and 1 part of magnesium stearate were mixed, and the roller speed was set to 20 rpm, the pressure to 60 bar and the screen to 1 mm to prepare dry granules and obtain the core.

[0186] (2) By weight, 2 parts of the modified polylactic acid provided in Preparation Example 11, 0.5 parts of hydroxypropyl methylcellulose and 0.5 parts of tributyl citrate were mixed to obtain the coating material.

[0187] (3) With a core-to-coating mass ratio of 7:2, the coating material is dissolved in ethanol and sprayed onto the core surface, then dried to obtain the solid burst beads.

[0188] Example 2

[0189] This embodiment provides a solid burst bead, the preparation method of which is as follows:

[0190] (1) By weight, 20 parts of the tar-reducing granules provided in Preparation Example 2, 15 parts of Henan tobacco powder, 1 part of peppermint flavoring, 5 parts of purple sweet potato powder and 0.5 parts of calcium stearate were mixed, and the roller speed was set to 20 rpm, the pressure to 60 bar and the screen to 1 mm to prepare dry granules and obtain the core.

[0191] (2) By weight, 1 part of the modified polylactic acid provided in Preparation Example 12, 1 part of hydroxypropyl cellulose and 0.1 part of acetylsicitrin tributyl ester are mixed to obtain the coating material.

[0192] (3) With a core-to-coating layer mass ratio of 10:1, the coating layer material is dissolved in methanol and then sprayed onto the core surface and dried to obtain the solid burst beads.

[0193] Example 3

[0194] This embodiment provides a solid burst bead, the preparation method of which is as follows:

[0195] (1) By weight, 10 parts of the coke-reducing granules provided in Preparation Example 3, 5 parts of Zimbabwean tobacco powder, 5 parts of sweet orange flavoring, 1 part of lotus root powder and 1.5 parts of zinc stearate were mixed, and the roller speed was set to 20 rpm, the pressure to 60 bar and the screen to 1 mm to prepare dry granules and obtain the core.

[0196] (2) By weight, 3 parts of the modified polylactic acid provided in Preparation Example 13, 0.1 parts of polyvinyl alcohol and 1 part of trihexyl citrate were mixed to obtain the coating material.

[0197] (3) With a core-to-coating mass ratio of 4:3, the coating material is dissolved in dichloromethane and then sprayed onto the core surface and dried to obtain the solid burst beads.

[0198] Examples 4-10

[0199] This embodiment provides a solid bursting bead, which differs from Example 1 only in that the "coke-reducing granules provided in Preparation Example 1" are replaced with an equal number of "coke-reducing granules provided in Preparation Examples 4-10", while the other raw materials and steps remain unchanged.

[0200] Examples 11-16

[0201] This embodiment provides a solid bursting bead, which differs from Example 1 only in that the "modified polylactic acid provided in Preparation Example 11" is replaced with an equal number of "modified polylactic acid provided in Preparation Examples 14-19", while the other raw materials and steps remain unchanged.

[0202] Comparative Example 1

[0203] This comparative example provides a solid burst bead, which differs from Example 1 only in that no tar-reducing particles are added to the core.

[0204] Comparative Example 2

[0205] This comparative example provides a solid bursting bead, which differs from Example 1 only in that modified polylactic acid is not added to the coating layer.

[0206] Test Example 1

[0207] The solid flavoring beads provided in Examples 1-10 and Comparative Example 1 were used in the preparation of cigarettes using filter rods, with an addition amount of 50 mg / cigarette. All filter rods were 25 mm in length, and the same auxiliary materials were used during cigarette rolling, all on the same cigarette rolling machine to ensure consistent tobacco quality across groups. Each group of filter rods produced 6 cigarettes.

[0208] The phenol content was determined according to YC / T 255-2008, "Determination of Major Phenolic Compounds in Mainstream Cigarette Smoke by High Performance Liquid Chromatography"; the ammonia content was determined according to YC / T 377-2010, "Determination of Ammonia in Mainstream Cigarette Smoke by Ion Chromatography"; and the tar content was determined according to GB / T 19609-2004, "Determination of Total Particulate Matter and Tar in Cigarettes Using a Conventional Analytical Smoking Machine".

[0209] The test results are shown in Table 1. The tar-reducing particles in the core can reduce the tar content in the smoke and selectively adsorb harmful substances such as phenol and ammonia in the smoke. Polyethylene glycol, polyvinyl alcohol and glycerol work together to provide hydroxyl groups to bind phenol on the surface of activated carbon, while calcium ions, magnesium ions and copper ions work together to complex ammonia, selectively purifying the smoke and ensuring the stability of cigarette aroma and flavor.

[0210] Table 1

[0211]

[0212]

[0213] Test Example 2

[0214] The solid flavoring beads provided in Examples 1-3, Examples 11-16, and Comparative Example 2 were used in the preparation of cigarettes using filter rods, with an addition amount of 50 mg / cigarette. All filter rods were 25 mm in length, and the same auxiliary materials were used during cigarette rolling, all on the same cigarette rolling machine to ensure consistent tobacco quality across groups. Each group of filter rods produced 6 cigarettes.

[0215] The free radical content was determined according to DB45 / T 1494-2017, "Determination of Gas-Phase Free Radical Content in Mainstream Cigarette Smoke - Electron Spin Resonance Spectroscopy".

[0216] The test results are shown in Table 2. The modified polylactic acid in the coating layer has excellent antioxidant properties and effectively removes free radicals in the smoke. Nanocellulose, nanolignin, and nanochitin have a synergistic effect, as do camellia oil, coconut oil, and perilla seed oil, which improve the network structure of polylactic acid, enhance its antioxidant properties, effectively remove free radicals in the smoke, and improve the smoking experience.

[0217] Table 2

[0218]

[0219]

[0220] Test Example 3

[0221] The solid flavor capsules provided in Examples 1-16 and Comparative Examples 1-2 were used in the preparation of cigarettes using filter rods, with an addition amount of 50 mg / cigarette. All filter rods were 25 mm in length, and the same auxiliary materials and the same cigarette rolling machine were used to ensure consistent tobacco quality across groups. Six cigarettes were produced from each group of filter rods. Simultaneously, a control filter rod with a length of 25 mm was prepared using a standard filter core, and cigarettes were also made from this control filter rod (control group).

[0222] Thirteen professional tasters were organized to conduct sensory evaluations of the various indicators of the cigarettes obtained above, in accordance with GB5606.4-2005 "Cigarettes Part 4: Sensory Technical Requirements". The specific definitions of the sensory quality evaluation indicators are shown in Table 3, the scoring criteria are shown in Table 4, and the scoring results are shown in Table 5 (the average value of each group is taken and one decimal place is retained).

[0223] The core and coating components of this invention work together to purify the smoke. The optimized modification and adjustment of the tar-reducing particles and polylactic acid make the solid flavor capsules have a significant tar-reducing and aroma-enhancing effect, thereby increasing users' acceptance of low-tar cigarette products.

[0224] Table 3

[0225]

[0226] Table 4

[0227]

[0228]

[0229] Table 5

[0230] Test sample smoke volume aroma Mixed gases Harmony Irritating taste Total Score Example 1 9.5 29.2 9.4 9.5 14.8 24.8 97.2 Example 2 9.7 29.4 9.2 9.3 14.7 24.2 96.5 Example 3 9.4 29.2 9.6 9.4 14.9 24.4 96.9 Example 4 8.2 27.2 8.4 8.2 13.1 22.9 88 Example 5 8.3 27.1 8.7 8.4 14.1 23.2 89.8 Example 6 8.1 28.2 8.3 8.2 14.8 23.1 90.7 Example 7 7.9 27.5 8.1 8.2 14.8 23.4 89.9 Example 8 7.7 27.4 8.6 8.3 14.6 23.8 90.4 Example 9 7.8 27.9 8.7 8.5 14.2 23.1 90.2 Example 10 8.9 28.4 9.2 9.1 14.8 23.7 94.1 Example 11 6.8 25.1 6.4 7.1 12.9 22.7 81 Example 12 6.4 25.6 6.2 7.3 12.6 22.5 80.6 Example 13 6.2 25.2 6.8 7.1 12.7 21.9 79.9 Example 14 6.1 24.3 5.9 6.8 11.9 20.2 75.2 Example 15 6.2 24.7 5.4 6.4 11.6 20.4 74.7 Example 16 6.3 24.8 5.8 6.8 11.7 20.9 76.3 Comparative Example 1 5.2 21.1 4.9 6.2 10.2 18.2 65.8 Comparative Example 2 5.5 22.1 5.2 6.7 10.9 19.2 69.6 control group 5.1 19.2 4.8 6.2 10.1 17.8 63.2

[0231] This invention illustrates a solid popping bead, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

[0232] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0233] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A solid burst bead, characterized in that, The solid burst bead includes a core and a coating layer covering the core; The core components include tar-reducing particles, tobacco powder, flavoring, diluent, and lubricant; The coating layer comprises modified polylactic acid, a film-forming agent, and a plasticizer.

2. The solid burst beads according to claim 1, characterized in that, The mass ratio of the core to the coating layer is (4-10):(1-3); The core components, by weight, include 10-20 parts of tar-reducing particles, 5-15 parts of tobacco powder, 1-5 parts of flavoring, 1-5 parts of diluent, and 0.5-1.5 parts of lubricant. The coating layer comprises, by weight, 1-3 parts modified polylactic acid, 0.1-1 parts film-forming agent, and 0.1-1 parts plasticizer.

3. The solid burst beads according to claim 1 or 2, characterized in that, The coke-reducing particles are prepared by a method comprising the following steps: (1) The plant powder was carbonized and then mixed with an aqueous solution of metal ions containing a surface modifier. After the first ultrasonic treatment, it was mixed with thiourea and then subjected to a second ultrasonic treatment. The reaction was carried out, and the solid and liquid were separated to obtain modified biochar. (2) The modified biochar is mixed with an aqueous solution containing an encapsulating agent, the solid and liquid are separated, and the mixture is dried to obtain the coke-reducing particles.

4. The solid burst beads according to claim 3, characterized in that, The carbonization temperature is 300-500℃, and the time is 1-3 hours; Preferably, the carbonization process further includes water washing and drying steps; Preferably, the ratio of the plant powder to the surface modifier is (3-7) g:(0.01-0.08) mol; Preferably, the surface modifier comprises any one or a combination of at least two of polyethylene glycol, polyvinyl alcohol, glycerin, or cyclodextrin; Preferably, the surface modifier includes polyethylene glycol, polyvinyl alcohol, and glycerin; Preferably, the molar ratio of polyethylene glycol, polyvinyl alcohol and glycerin is (1-10):(1-8):(1-5); Preferably, the ratio of plant powder to metal ions is (3-7) g:(0.01-0.05) mol; Preferably, the metal ions include any one or a combination of at least two of calcium ions, magnesium ions, copper ions, ferric ions, or zinc ions; Preferably, the metal ions include calcium ions, magnesium ions, and copper ions; Preferably, the molar ratio of calcium ions, magnesium ions and copper ions is (1-10):(1-10):(1-10); Preferably, the temperature of the first ultrasound is 70-90℃ and the time is 20-40 minutes; Preferably, the ratio of the plant powder to thiourea is (3-7) g:(0.03-0.1) mol; Preferably, the temperature of the second ultrasound is 70-90℃, and the time is 0.5-1.5h; Preferably, the reaction temperature is 140-160℃ and the time is 5-7 hours; Preferably, in step (1), the solid-liquid separation method is filtration; Preferably, in step (1), the solid-liquid separation is followed by a drying step; Preferably, the mass ratio of the modified biochar to the encapsulating agent is (20-50):(10-30); Preferably, the embedding agent comprises any one or a combination of at least two of agar, paraffin, or gelatin; Preferably, in step (2), the mixing temperature is 90-120℃ and the time is 20-40 min; Preferably, in step (2), the mixing method is stirring; Preferably, in step (2), the solid-liquid separation method is filtration; Preferably, in step (2), the drying method is freeze drying.

5. The solid burst beads according to any one of claims 1-4, characterized in that, The modified polylactic acid is prepared by a method comprising the following steps: Polylactic acid is mixed with an organic solution containing nano-polymer materials, dissolved by ultrasonication, and then mixed with vegetable oil, cured, and dried to obtain the modified polylactic acid.

6. The solid burst beads according to claim 5, characterized in that, The mass ratio of polylactic acid to nanopolymer material is (1-3):(0.1-1); Preferably, the nanopolymer material includes any one or a combination of at least two of nanocellulose, nanolignin, or nanochitin; Preferably, the nanopolymer material includes nanocellulose, nanolignin, and nanochitin; Preferably, the mass ratio of the nanocellulose, nanolignin, and nanochitin is (1-10):(1-8):(1-3); Preferably, the organic solution comprises any one or a combination of at least two of chloroform, dichloromethane, chloroform, acetone or ethyl acetate; Preferably, the mass ratio of polylactic acid to vegetable oil is (1-3):(1-3); Preferably, the vegetable oil includes any one or a combination of at least two of camellia oil, coconut oil, or perilla seed oil; Preferably, the vegetable oil includes camellia oil, coconut oil, and perilla seed oil; Preferably, the mass ratio of camellia oil, coconut oil and perilla seed oil is (1-9):(1-8):(1-5); Preferably, the mixing temperature with the vegetable oil is 50-70℃, and the mixing time is 0.5-1.5h; Preferably, the curing temperature is 25-35℃ and the curing time is 20-28h; Preferably, the drying temperature is 60-80℃ and the time is 10-14h.

7. The solid burst beads according to any one of claims 1-6, characterized in that, The diluent includes any one or a combination of at least two of the following: plant powder, lactose, microcrystalline cellulose, calcium bicarbonate, mannitol, fructose, sorbitol, or sucrose; Preferably, the lubricant comprises any one or a combination of at least two of magnesium stearate, calcium stearate, zinc stearate, red ochre powder, talc, magnesium lauryl sulfate, glyceryl monostearate, glyceryl palmitate stearate, sodium lauryl sulfate, or sodium stearate fumarate. Preferably, the film-forming agent comprises any one or a combination of at least two of hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone, pullulan, or gum arabic; Preferably, the plasticizer comprises any one or a combination of at least two of the following: tributyl citrate, acetylated tributyl citrate, trihexyl citrate, acetylated trihexyl citrate, butyryl trihexyl citrate, trioctyl citrate, acetylated trioctyl citrate, or triacetin.

8. The method for preparing solid burst beads according to any one of claims 1-7, characterized in that, The method includes: The tar-reducing particles, tobacco powder, flavoring, diluent and lubricant are mixed to prepare dry particles; modified polylactic acid, film-forming agent, plasticizer and organic solvent are mixed and sprayed onto the surface of the dry particles, and dried to obtain the solid burst beads.

9. The method according to claim 8, characterized in that, The organic solvent includes any one or a combination of at least two of ethanol, methanol, acetone, dichloromethane, or ethyl acetate.

10. The use of solid flavor capsules according to any one of claims 1-7 in the preparation of cigarette filter rods.

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