Composite sustained-release particle with color changing function as well as preparation method and application of composite sustained-release particle

Abstract

The invention discloses composite slow-release particles with a color changing function and a preparation method and application thereof, and relates to the technical field of cigarette aroma enhancement. The preparation method of the composite sustained-release particles comprises the following steps: preparing the perfumed bioactive sustained-release body, the perfumed sustained-release gel melt, the bio-polymer composite fragrance sustained-release wet base material, the bio-polymer composite sustained-release flavor pellet core, the temperature-sensitive toner mixture and the composite sustained-release particles with the color changing function. The prepared composite slow-release particle has a core-shell structure, an inner core is a biological-polymer composite slow-release flavor pill core, and a shell layer is a temperature-sensitive color-changing layer. The core of the composite sustained-release particle with the color changing function mainly plays a role in sustained-release perfuming in the smoking process and provides taste experience for consumers, and the shell layer mainly changes color in the smoking process and provides visual experience for the consumers. Therefore, the visual color-changing experience and the multi-sensory experience of smoking rich flavors are met at the same time, and the effect of improving the experience is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette flavoring, and in particular to composite slow-release particles with a color-changing function, and a preparation method and application thereof. Background Art

[0002] With the increasing popularity of standard acetate filters in cigarettes and the increasing diversification of consumer demands, tobacco manufacturers are seeking more unique and comprehensive filter development strategies. They are gradually moving away from single-function filter designs and adopting a wider range of filter solutions. However, existing cigarette filter designs are often limited to a single taste or visual effect, failing to deliver a multi-sensory experience.

[0003] In terms of visual innovation, the emergence of color-changing cigarette filters offers consumers a whole new visual experience. These filters are embedded with temperature-sensitive color-changing particles that change color as the cigarette's temperature rises, creating a dynamic visual experience for smokers. Specifically, when a smoker lights a cigarette and begins to draw, the smoke in the mouthpiece gradually heats up, triggering the temperature-sensitive color-changing particles to react, causing parts of the filter to change color.

[0004] However, although the existing color-changing cigarette filters have made breakthroughs in visual effects, they still have the following shortcomings in terms of sustained release of smoking flavor and aroma: 1. While simply pursuing the color-changing effect, these color-changing particles often ignore the integration of smoking flavor and aroma. Therefore, cigarettes often only bring consumers a single visual experience during the smoking process, and lack pleasant flavor and aroma. 2. Existing color-changing cigarette particles also have some technical defects. Since the flavor substances are volatile and have a short storage time, these particles are often difficult to release fragrance for a long time. 3. Due to the limited adsorption capacity of flavor substances, the loss of flavor substances during the processing is also large, resulting in low flavor transmission efficiency.

[0005] Furthermore, existing color-changing particles also suffer from the following issues regarding their color-changing effects: 1. Currently, color-changing particles are formed by directly mixing a color-changing material with a powdered base material or binder. This means that the color-changing material is dispersed throughout the particle, with the majority of the material residing within the particle. However, this internal color-changing material is affected by the external base material, which weakens the visible color-changing effect, thus failing to fully utilize the color-changing material. 2. The color-changing material directly utilizes a color-changing material. Therefore, the color change of these related art temperature-sensitive color-changing particles relies entirely on the color-changing material's own electron transfer reaction to achieve color change. However, the color of the color-changing material itself is far less vibrant than that of synthetic pigments, and the color it changes lacks a metallic luster. In some cases, the color change of a specific color is not noticeable, thus failing to effectively enhance the gloss of the color after color change. 3. To ensure the color-changing effect, existing related art requires a large amount of color-changing material added to the particles, typically ranging from 10% to 30% by weight of the particle mass.

[0006] These issues not only affect the overall quality of cigarettes but also limit the further development of color-changing cigarette filters. Therefore, developing a cigarette filter particle that can achieve both color-changing effects and sustained flavor release has become a technical challenge that the tobacco industry urgently needs to solve.

[0007] In order to solve the above problems, the present invention is proposed. Summary of the Invention

[0008] To address the aforementioned technical challenges of color-changing particles in cigarette filter rods, the present invention provides composite sustained-release particles with color-changing functionality, as well as their preparation method and application. The present invention aims to visualize changes in mainstream smoke temperature during smoking while also allowing the aroma characteristics of the particles to be perceived through inhalation, thereby increasing the multi-sensory enjoyment of cigarette smoking. Furthermore, the present invention provides particles that simultaneously achieve color change and sustained release of biological activity, as well as their preparation method and application.

[0009] The present invention aims to overcome the shortcomings of the existing technology. In view of the problems of the current color-changing cigarette particles, such as the volatility of flavor substances, short storage time, small amount of flavor substance adsorption, large loss of flavor substances during processing, and low transmission efficiency, the present invention applies color-changing bioactive fermentation slow-release flavor-carrying particles (composite slow-release particles with color-changing function) to transparent cavity filter rods, which can enable consumers to visually feel the reversible or irreversible color change effect of the particles as the color changes with temperature when smoking cigarettes, forming a unique type of special cigarette filter rod. At the same time, the flavor characteristics of the particles can also be felt from the smoking, increasing the interest of multiple senses when smoking cigarettes.

[0010] Among them, the preparation method of composite sustained-release particles with color-changing function includes the preparation of flavoring bioactive sustained-release body, flavoring sustained-release gel melt, bio-polymer composite flavor sustained-release wet base material, bio-polymer composite sustained-release flavor pill core, temperature-sensitive color powder mixture, and composite sustained-release particles with color-changing function. The prepared composite sustained-release particles with color-changing function have a core-shell structure, the core is the bio-polymer composite sustained-release flavor pill core, and the shell is the temperature-sensitive color-changing layer. The core of the composite sustained-release particles with color-changing function of the present invention mainly plays the role of sustained-release flavoring during the puffing process, providing consumers with a taste experience, while the shell mainly produces a color change during the puffing process, providing consumers with a visual experience, thereby satisfying the visual color change experience and the multi-sensory experience of rich flavor in the puffing at the same time, thereby achieving the effect of increasing the experience.

[0011] The technical solution adopted by the present invention is:

[0012] In a first aspect, a method for preparing composite sustained-release particles with a color-changing function is provided, comprising the following steps:

[0013] Step (1): uniformly mixing the bio-fermentation carrier, the bioactive agent and water to form a paste-like mixture;

[0014] Step (2): placing the paste mixture obtained in step (1) in a fermentation environment for fermentation to form a bio-fermentation porous flavor carrier;

[0015] Step (3): stirring the bio-fermented porous flavor carrier obtained in step (2), and then irradiating it with an ultraviolet lamp to obtain an inactivated bio-porous flavor carrier;

[0016] Step (4): adding flavor essence to the inactivated biological porous flavor carrier obtained in step (3) to obtain a flavored biologically active sustained-release body;

[0017] Step (5): melting the polymer flavor carrier, water and pigment under heating conditions and stirring them evenly to obtain a gel solution;

[0018] Step (6): After the gel solution obtained in step (5) is cooled, flavoring is added to the gel solution to obtain a flavored sustained-release gel solution;

[0019] Step (7): fully mixing the flavoring bioactive sustained-release body obtained in step (4) with the flavoring sustained-release gel solution obtained in step (6), stirring evenly to obtain a bio-polymer composite flavor sustained-release wet substrate;

[0020] Step (8): granulating the bio-polymer composite flavor sustained-release wet substrate obtained in step (7) to form a granular structure, taking it out and drying it to obtain a bio-polymer composite sustained-release flavor pellet core;

[0021] Step (9): screening the bio-polymer composite slow-release flavor pellets to obtain pellets with the desired particle size;

[0022] Step (10): placing the pellets of the desired particle size obtained in step (9) into a rotary coating pan and rotating them for sphericalization, then spraying a wetting agent and continuing to rotate to obtain the pellets in the rotary coating pan;

[0023] Step (11): uniformly mixing the temperature-sensitive color powder and the powder binder to obtain a temperature-sensitive color powder mixture;

[0024] Step (12): Sprinkle the temperature-sensitive color powder mixture obtained in step (11) on the pellet cores in the rotary coating pan in step (10), so that the temperature-sensitive color powder mixture is evenly adhered to and coated on the pellet cores in the rotary coating pan to form a temperature-sensitive color-changing layer, thereby obtaining pellet cores coated with the mixture;

[0025] Step (13): allowing the pellet cores coated with the mixture obtained in step (12) to continue rotating in the rotary coating pan until the pellet cores coated with the mixture with high roundness are obtained, and then taking them out and drying them to obtain the composite sustained-release particles with color-changing function.

[0026] The paste mixture in step (1) has elasticity; the bio-polymer composite flavor sustained-release wet substrate prepared in step (7) has color; and the bio-polymer composite sustained-release flavor pellet core prepared in step (8) has color.

[0027] Furthermore, in step (1), the biofermentation carrier is selected from one or more of porous starch, amylose, corn starch, sweet potato starch, wheat flour, microcrystalline cellulose, and agar; the bioactive agent is selected from one or more of Lactobacillus bulgaricus, budding yeast, Acetobacter aceti, Debaryomyces hansenii, Bifidobacterium, and lactose; and the weight ratio of the biofermentation carrier, bioactive agent, and water is (30-95): (0.5-15): (10-50).

[0028] Wherein, the fermentation environment in step (2) is an environment with low oxygen and low humidity.

[0029] Preferably, in step (2), the fermentation environment has an oxygen content of 5-18% (volume percentage), a humidity of 30-45% (volume percentage), and the fermentation time is 4-48 hours.

[0030] Preferably, in step (3), the stirring time is 5-10 min, and the ultraviolet lamp irradiation time is 30-120 min.

[0031] Furthermore, in step (4), the flavor is selected from one or more of fruit flavor, tea flavor, floral flavor, mint flavor, and coffee flavor; and the amount of flavor added is 2-20 wt% of the mass of the inactivated biological porous flavor carrier.

[0032] Furthermore, in step (5), the polymer flavor carrier is selected from one or more of natural pectin, gum arabic, polyethylene glycol 4000, polyethylene glycol 6000, and stearic acid; the pigment is selected from one or more of lemon yellow, sunset red, fruit green, and brilliant blue; and the weight ratio of the polymer flavor carrier, water, and pigment is (40-90): (5-20): (0.01-4).

[0033] Preferably, in step (5), the heating temperature is 80-100°C.

[0034] Furthermore, in step (6), the amount of flavor added is 2-16% of the mass of the gel solution, and the flavor is selected from one or more of fruit flavor, tea flavor, floral flavor, mint cooling flavor, and coffee flavor; in step (7), the mass ratio of the flavored bioactive sustained-release body to the flavored sustained-release gel solution is (3-7):(5-7).

[0035] Preferably, in step (6), flavor is added when the gel solution is cooled to 40-60°C.

[0036] Preferably, in step (8), granulation is performed by a side extrusion granulator, the drying temperature is 70-90° C., and the drying time is 20-60 min.

[0037] Preferably, in step (9), the particle size of the pellet core is 0.5-3 mm.

[0038] Furthermore, in step (10), the wetting agent is selected from one or more of ethanol, propylene glycol, glycerol, and water; the mass of the wetting agent is 2-13% of the mass of the pellet core with the desired particle size.

[0039] Preferably, in step (10), the rotation speed of the rotary coating pan is 5-25 r / s, the rotation and spheronization time is 1-3 min, and the rotation is continued for 2 min after spraying the wetting agent.

[0040] The purpose of step (10) is to spray the wetting agent and continue to rotate to ensure that it is evenly covered on the surface of the particles. At this time, the surface of the particles of the pellets with the required particle size is evenly retained with a water film layer, which is easy for subsequent powder to adhere.

[0041] Furthermore, in step (11), the powder binder is selected from one or more of sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, ethyl cellulose, polyacrylic resin, and sodium alginate; the temperature-sensitive color powder is selected from one or more of black-to-white color-changing powder, red-to-white color-changing powder, green-to-white color-changing powder, brown-to-white color-changing powder, and purple-to-white color-changing powder; the weight ratio of the temperature-sensitive color powder to the powder binder is (2-10):(1-3); in step (12), the mass of the temperature-sensitive color powder mixture is 2-6% of the mass of the pill cores in the rotary coating pan.

[0042] Preferably, in step (11), the time for uniform mixing is 5-10 minutes.

[0043] The temperature-sensitive toner used in the present invention is an organic compound that changes color at a specific temperature due to electron transfer causing the molecular structure of the organic matter to change. The color change temperature range of the temperature-sensitive toner used in the present invention is 30-75°C.

[0044] Furthermore, in step (13), the high roundness of the pellet core coated with the mixture means that the percentage difference between the longest diameter and the shortest diameter is 3-8%.

[0045] Preferably, in step (13), the rotation time in the rotary coating pan is 5-15 minutes, the drying is forced air drying, the drying temperature is 25-50° C., and the drying time is 1-3 hours, until the moisture content of the pellets wrapped in the mixture with high roundness is dried to 7-13%.

[0046] In a second aspect, a composite sustained-release granule with a color-changing function is provided, which is prepared by the preparation method of the composite sustained-release granule with a color-changing function described in the first aspect.

[0047] Preferably, the composite sustained-release particles with color-changing function have a core-shell structure, including a core and a shell layer covering the surface of the core, wherein the core is a bio-polymer composite sustained-release flavor pellet core, and the shell layer is a temperature-sensitive color-changing layer.

[0048] Preferably, in the composite sustained-release particles with color-changing function, the particle size of the core is 0.5-3 mm, and the thickness of the shell is 10-15 μm.

[0049] Among them, since the thickness of the temperature-sensitive color-changing layer is 10-15 μm, which is very thin, as long as it turns white, the bright color of the bio-polymer composite sustained-release flavor pill core itself can be revealed.

[0050] In a third aspect, there is provided a use of the composite slow-release particles with color-changing function as described in the second aspect in a cigarette filter rod, wherein the mass of the composite slow-release particles with color-changing function is 10-30% of the cigarette filter rod.

[0051] Usually, for the purpose of color display, the tube wall of such cigarette filter rod is transparent.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The color-changing composite sustained-release particles prepared by the present invention have a core-shell structure, with the core being a bio-polymer composite sustained-release flavor pellet core and the shell being a temperature-sensitive color-changing layer. The core primarily functions to slowly release flavor during smoking, providing consumers with a taste experience, while the shell primarily changes color during smoking, providing consumers with a visual experience. This simultaneously satisfies the multi-sensory experience of visual color change and a rich flavor experience, thereby enhancing the experience. In contrast, existing filter plug particles for cigarettes primarily emphasize the characteristics of cigarettes through either olfactory or visual means, resulting in a lack of richness and appeal.

[0054] 2. The core of the color-changing composite slow-release granules prepared by the present invention is a bio-polymer composite slow-release flavor pellet core. This pellet core is granulated from a bio-polymer composite slow-release flavor wet matrix formed by a flavoring bioactive slow-release body and a flavoring slow-release gel melt. The bioactive fermentation slow-release carrier enhances the activity of the flavor essence, and its microscopic porous structure effectively releases the fragrance. The polymer condensation slow-release carrier is nonvolatile, maintaining its fragrance for a long time. Furthermore, after the suction reaches a certain temperature, the gel deforms, effectively dispersing the flavoring substances evenly, reducing volatility and effectively releasing the fragrance, thereby improving the stability and uniformity of the flavoring.

[0055] 3. The composite sustained-release particles with color-changing function prepared by the present invention are directly coated on the surface of the pellet core with a color-changing material (temperature-sensitive color powder) to form a temperature-sensitive color-changing layer. That is to say, the color-changing material is distributed in the outer layer of the particles (pellet core). Therefore, the coloring power of the temperature-sensitive color-changing particles (temperature-sensitive color-changing layer) of the present invention is stronger, and the color change visible to the naked eye will be more obvious.

[0056] 4. The color-changing composite slow-release granules prepared by the present invention are first uniformly colored with the target color for the slow-release flavor core, and then directly coated with a temperature-sensitive color-changing material to form a color-changing layer on the surface of the slow-release flavor core with the target color. In the prior art, the color of the color-changing material itself is far less vivid than that of the synthetic pigment, and the color changed by the color-changing material lacks a metallic luster. In some cases, the color change of a specific color is not obvious, thus failing to highlight the gloss of the color after the color change. In contrast, the present invention first coats the core with the target color, and then coats the core with a color-changing material that changes to white. This results in a sharp contrast between the before and after color change of the composite slow-release granules with a color-changing function, and a metallic luster after the color change.

[0057] 5. The composite sustained-release granules with color-changing function prepared by the present invention use less color-changing material than the thermosensitive color-changing granules of the same volume. In the existing related art, the color-changing material is generally added in an amount of 10wt%-30wt%, while the present invention only uses a color-changing material within 6wt% (i.e., the mass of the temperature-sensitive color powder mixture is 2-6% of the mass of the pellet core in the rotary coating pan). Although the amount of the temperature-sensitive color-changing layer added in the present invention is relatively small, it can cover the relatively light color of the pellet core because it is dark before color change (red, green, brown or purple). After the outer layer turns white, the inner color can be revealed precisely because it is thin. The composite sustained-release granules with color-changing function of the present invention have a better color-changing effect than other temperature-sensitive color-changing granules.

[0058] 6. Compared to existing technologies, the color-changing composite sustained-release granules prepared by the present invention utilize a wide range of raw materials, are simple to prepare, easily control quality, and have low production costs. They can be mass-produced with regular roundness and varying particle sizes, and exhibit significantly improved color-changing and flavor-release effects compared to existing granules.

[0059] 7. The composite slow-release particles with color-changing function prepared by the present invention are a new form of flavored slow-release particles added to the cavity filter rod, which is a flavor slow-release technology that combines biologically active fermentation slow-release and polymer coagulation slow-release. DETAILED DESCRIPTION

[0060] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0061] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0062] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0063] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0064] The experimental methods without specific conditions specified in the examples are generally carried out under conventional conditions and those described in the manual, or under conditions recommended by the manufacturers. The general equipment, materials, reagents, etc. used are all commercially available unless otherwise specified.

[0065] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below.

[0066] Example 1

[0067] The preparation method of composite sustained-release particles P1 with color-changing function comprises the following steps:

[0068] Step (1): 67% of a biological fermentation carrier (20% porous starch, 47% wheat flour), 3% of a bioactive agent (budding yeast), and 30% of water are thoroughly mixed using a stirring device to form a paste-like mixture having a certain elasticity;

[0069] Step (2): placing the paste mixture obtained in step (1) in a fermentation environment (low oxygen, low humidity environment, oxygen volume percentage of 10%, humidity volume percentage of 35%) for 24 hours to form a bio-fermentation porous flavor carrier;

[0070] Step (3): stirring the bio-fermentation porous flavor carrier obtained in step (2) for 6 minutes, and then irradiating it with an ultraviolet lamp for 90 minutes to fully inactivate it, thereby obtaining an inactivated bio-porous flavor carrier;

[0071] Step (4): adding flavor essence (mint cooling flavor essence) to the inactivated biological porous flavor carrier obtained in step (3), wherein the amount of flavor essence added is 10 wt% of the mass of the inactivated biological porous flavor carrier, to obtain a flavored biologically active sustained-release body;

[0072] Step (5): According to weight percentage, 80% of a polymer flavor carrier (60% polyethylene glycol 4000, 20% stearic acid), 19.97% of water, and 0.03% of a pigment (tartrazine) are heated to 90° C., melted, and stirred to obtain a gel solution;

[0073] Step (6): When the gel solution obtained in step (5) is cooled to 50° C., flavor (mint cooling flavor) is added to the gel solution, and the amount of flavor added is 15% of the mass of the gel solution to obtain a flavored sustained-release gel solution;

[0074] Step (7): the flavored bioactive sustained-release body obtained in step (4) and the flavored sustained-release gel solution obtained in step (6) are fully mixed in a mass ratio of 3:7, and stirred for 20 minutes using a stirring device until the mixture is uniformly stirred to obtain a bio-polymer composite flavor sustained-release wet substrate, wherein the bio-polymer composite flavor sustained-release wet substrate has color;

[0075] Step (8): The bio-polymer composite flavor sustained-release wet substrate obtained in step (7) is granulated by a side extrusion molding granulator to form a granular structure, and then taken out and dried by forced air at a drying temperature of 85° C. and a drying time of 30 minutes to obtain a bio-polymer composite sustained-release flavor pellet core; the bio-polymer composite sustained-release flavor pellet core has a bright yellow color;

[0076] Step (9): screening the bio-polymer composite slow-release flavor pellets to obtain pellets of desired particle size; the desired particle size of the pellets is 2 mm;

[0077] Step (10): the pellets of the desired particle size obtained in step (9) are placed in a rotary coating pan for rotation and spheronization. The rotation speed of the rotary coating pan is 10 r / s and the rotation and spheronization time is 3 min. Then, a wetting agent is sprayed. The wetting agent is water. The mass of the wetting agent is 5% of the mass of the pellets of the desired particle size. The pellets are rotated for 2 min to ensure that the wetting agent is evenly covered on the surface of the pellets (pellets of the desired particle size). The pellets in the rotary coating pan are obtained.

[0078] The purpose of step (10) is to uniformly retain a water film layer on the surface of the pellet core particles, making it easier for subsequent powder to adhere.

[0079] Step (11): using a stirring device, uniformly mixing the black-to-white color-changing powder (temperature-sensitive color powder) and sodium carboxymethyl cellulose (powder binder) in a weight ratio of 3:1 for 8 minutes to obtain a temperature-sensitive color powder mixture;

[0080] Step (12): Sprinkle the temperature-sensitive color powder mixture obtained in step (11) on the pill cores in the rotary coating pan in step (10), so that the temperature-sensitive color powder mixture is evenly adhered to and wrapped on the pill cores in the rotary coating pan to form a temperature-sensitive color-changing layer, and obtain pill cores wrapped with the mixture; the mass of the temperature-sensitive color powder mixture is 4% of the mass of the pill cores in the rotary coating pan; Step (13): Let the pill cores wrapped with the mixture obtained in step (12) continue to rotate in the rotary coating pan for 10 minutes until the mixture-wrapped pill cores with a high roundness and a percentage difference of 5% between the longest diameter and the shortest diameter are obtained, and then take them out and carry out forced drying at a drying temperature of 40°C and a drying time of 2 hours until the moisture weight of the pill cores wrapped with the mixture with a high roundness is dried to 7%, thereby obtaining the composite sustained-release particles P1 with color-changing function.

[0081] The color-changing composite sustained-release granules P1, produced using the method for preparing color-changing composite sustained-release granules described in Example 1, have a core-shell structure, comprising an inner core and a shell layer covering the inner core. The inner core is a bio-polymer composite sustained-release flavored pellet, and the shell is a temperature-sensitive color-changing layer. The inner core of the color-changing composite sustained-release granules P1 has a particle size of 2 mm and a shell thickness of 12 μm.

[0082] Test Example 1

[0083] Experimental Example 1 is cigarette A1, prepared as follows: Composite slow-release particles P1 with a color-changing function are loaded into the cavity of a filter rod, with the mass percentage of composite slow-release particles P1 with a color-changing function being 10% of the filter rod, to produce a multi-effect filter rod Q1. Multi-effect filter rod Q1 is then placed on a cigarette machine to produce cigarette A1.

[0084] Test Example 2

[0085] Experimental Example 2, cigarette B1, was prepared as follows: Composite slow-release particles P1 with color-changing properties were loaded into the cavity of a filter rod, with the mass percentage of composite slow-release particles P1 with color-changing properties being 15% of the total weight of the filter rod, to produce a multi-effect filter rod Q2. Multi-effect filter rod Q2 was then placed on a cigarette machine to produce cigarette B1.

[0086] Comparative Example 1

[0087] Comparative Example 1 is cigarette C1. Compared with Test Example 1, Comparative Example 1 differs in that the filler of the filter rod is composed only of tow, and the other conditions are the same.

[0088] Comparative Example 2

[0089] Comparative Example 2 is cigarette C2. Compared to Experimental Example 1, Comparative Example 2 differs in that the filter rod is filled with color-changing composite sustained-release particles P2, while all other conditions remain the same. The only difference between color-changing composite sustained-release particles P2 and color-changing composite sustained-release particles P1 is that, in step (12) of the preparation method, the mass of the temperature-sensitive color powder mixture is 10% of the mass of the pellets in the rotary coating pan.

[0090] Comparative Example 3

[0091] Comparative Example 3 is cigarette C3. Compared with Experimental Example 1, Comparative Example 3 differs in that the filler of the filter rod is composite slow-release particles P3 with a color-changing function, and the other conditions are the same.

[0092] The preparation method of composite sustained-release particles P3 with color-changing function comprises the following steps:

[0093] Step (1): 67% of a biological fermentation carrier (20% porous starch, 47% wheat flour), 3% of a bioactive agent (budding yeast), and 30% of water are thoroughly mixed using a stirring device to form a paste-like mixture having a certain elasticity;

[0094] Step (2): placing the paste mixture obtained in step (1) in a fermentation environment (low oxygen, low humidity environment, oxygen volume percentage of 10%, humidity volume percentage of 35%) for 24 hours to form a bio-fermentation porous flavor carrier;

[0095] Step (3): stirring the bio-fermentation porous flavor carrier obtained in step (2) for 6 minutes, and then irradiating it with an ultraviolet lamp for 90 minutes to fully inactivate it, thereby obtaining an inactivated bio-porous flavor carrier;

[0096] Step (4): adding flavor essence (mint cooling flavor essence) to the inactivated biological porous flavor carrier obtained in step (3), wherein the amount of flavor essence added is 10 wt% of the mass of the inactivated biological porous flavor carrier, to obtain a flavored biologically active sustained-release body;

[0097] Step (5): According to weight percentage, 80% of a polymer flavor carrier (60% polyethylene glycol 4000, 20% stearic acid), 19.97% of water, and 0.03% of a pigment (tartrazine) are heated to 90° C., melted, and stirred to obtain a gel solution;

[0098] Step (6): When the gel solution obtained in step (5) is cooled to 50° C., flavor (mint cooling flavor) is added to the gel solution, and the amount of flavor added is 15% of the mass of the gel solution to obtain a flavored sustained-release gel solution;

[0099] Step (7): the flavored bioactive sustained-release body obtained in step (4) and the flavored sustained-release gel solution obtained in step (6) are fully mixed in a mass ratio of 3:7, and stirred for 20 minutes using a stirring device until the mixture is uniformly stirred to obtain a bio-polymer composite flavor sustained-release wet substrate, wherein the bio-polymer composite flavor sustained-release wet substrate has color;

[0100] Step (8): using a stirring device, uniformly mix the black-to-white color-changing powder (temperature-sensitive color powder) and sodium carboxymethyl cellulose (powder binder) in a weight ratio of 3:1 for 8 minutes to obtain a temperature-sensitive color powder mixture;

[0101] Step (9): Sprinkle the temperature-sensitive color powder mixture obtained in step (8) on the bio-polymer composite fragrance sustained-release wet substrate prepared in step (7), mix evenly, until a mixture with a high roundness and a percentage difference of 5% between the longest diameter and the shortest diameter is obtained, take it out and dry it with air at a drying temperature of 40°C and a drying time of 2 hours to obtain the composite sustained-release particles P3 with color-changing function.

[0102] Example 2

[0103] The preparation method of composite sustained-release particles P4 with color-changing function comprises the following steps:

[0104] Step (1): 66% of a biological fermentation carrier (64% microcrystalline cellulose, 2% agar), 15% of a biologically active agent (lactose), and 19% of water were mixed thoroughly using a stirring device to form a paste-like mixture having a certain elasticity according to weight percentage;

[0105] Step (2): placing the paste mixture obtained in step (1) in a fermentation environment (low oxygen, low humidity environment, oxygen volume percentage of 5%, humidity volume percentage of 35%) for fermentation for 48 hours to form a bio-fermentation porous flavor carrier;

[0106] Step (3): stirring the bio-fermentation porous flavor carrier obtained in step (2) for 10 minutes, and then irradiating it with an ultraviolet lamp for 120 minutes to fully inactivate it, thereby obtaining an inactivated bio-porous flavor carrier;

[0107] Step (4): adding flavor essence (mint cooling flavor essence) to the inactivated biological porous flavor carrier obtained in step (3), wherein the amount of flavor essence added is 20 wt % of the mass of the inactivated biological porous flavor carrier, to obtain a flavored biologically active sustained-release body;

[0108] Step (5): According to weight percentage, 60% of a polymer flavor carrier (50% polyethylene glycol 6000, 20% stearic acid), 19.95% of water, and 0.05% of a pigment (tartrazine) are heated to 90° C., melted, and stirred to obtain a gel solution;

[0109] Step (6): When the gel solution obtained in step (5) is cooled to 50° C., flavor (mint cooling flavor) is added to the gel solution, and the amount of flavor added is 15% of the mass of the gel solution to obtain a flavored sustained-release gel solution;

[0110] Step (7): the flavored bioactive sustained-release body obtained in step (4) and the flavored sustained-release gel solution obtained in step (6) are fully mixed in a mass ratio of 3:7, and stirred for 20 minutes using a stirring device until the mixture is uniformly stirred to obtain a bio-polymer composite flavor sustained-release wet substrate, wherein the bio-polymer composite flavor sustained-release wet substrate has color;

[0111] Step (8): The bio-polymer composite flavor sustained-release wet substrate obtained in step (7) is granulated by a side extrusion molding granulator to form a granular structure, and then taken out and dried by forced air at a drying temperature of 85° C. and a drying time of 30 minutes to obtain a bio-polymer composite sustained-release flavor pellet core; the bio-polymer composite sustained-release flavor pellet core has a bright yellow color;

[0112] Step (9): screening the bio-polymer composite slow-release flavor pellets to obtain pellets of desired particle size; the particle size of the pellets of desired particle size is 1 mm;

[0113] Step (10): the pellets of the desired particle size obtained in step (9) are placed in a rotary coating pan for rotation and spheronization. The rotation speed of the rotary coating pan is 10 r / s and the rotation and spheronization time is 3 min. Then, a wetting agent is sprayed. The wetting agent is water. The mass of the wetting agent is 5% of the mass of the pellets of the desired particle size. The pellets are rotated for 2 min to ensure that the wetting agent is evenly covered on the surface of the pellets (pellets of the desired particle size). The pellets in the rotary coating pan are obtained.

[0114] The purpose of step (10) is to uniformly retain a water film layer on the surface of the pellet core particles, making it easier for subsequent powder to adhere.

[0115] Step (11): using a stirring device, uniformly mixing the black-to-white color-changing powder (temperature-sensitive color powder) and sodium carboxymethyl cellulose (powder binder) in a weight ratio of 6:1 for 8 minutes to obtain a temperature-sensitive color powder mixture;

[0116] Step (12): Sprinkle the temperature-sensitive color powder mixture obtained in step (11) on the pill cores in the rotary coating pan in step (10), so that the temperature-sensitive color powder mixture is evenly adhered to and wrapped on the pill cores in the rotary coating pan to form a temperature-sensitive color-changing layer, and obtain pill cores wrapped with the mixture; the mass of the temperature-sensitive color powder mixture is 4% of the mass of the pill cores in the rotary coating pan; Step (13): Let the pill cores wrapped with the mixture obtained in step (12) continue to rotate in the rotary coating pan for 10 minutes until the mixture-wrapped pill cores with a high roundness and a percentage difference of 5% between the longest diameter and the shortest diameter are obtained, and then take them out and carry out forced drying at a drying temperature of 40°C and a drying time of 2 hours until the moisture weight of the pill cores wrapped with the mixture with high roundness is dried to 7%, thereby obtaining the composite sustained-release particles P4 with color-changing function.

[0117] The color-changing composite sustained-release granules P4, produced using the method for preparing color-changing composite sustained-release granules in Example 2, have a core-shell structure, comprising an inner core and a shell layer covering the inner core. The inner core is a bio-polymer composite sustained-release flavored pellet, and the shell is a temperature-sensitive color-changing layer. The inner core of the color-changing composite sustained-release granules P4 has a particle size of 1 mm and a shell thickness of 14 μm.

[0118] Test Example 3

[0119] Experimental Example 3 is cigarette A2, prepared as follows: Composite slow-release particles P4 with a color-changing function are loaded into the cavity of a filter rod, with the mass percentage of composite slow-release particles P4 with a color-changing function being 15% of the filter rod, to produce a multi-effect filter rod Q3. Multi-effect filter rod Q3 is then placed on a cigarette machine to produce cigarette A2.

[0120] Test Example 4

[0121] Experimental Example 4, cigarette B2, was prepared as follows: Composite slow-release particles P4 with a color-changing function were loaded into the cavity of a filter rod, with the mass percentage of composite slow-release particles P4 with a color-changing function being 30% of the filter rod, to produce a multi-effect filter rod Q4. Multi-effect filter rod Q4 was then placed on a cigarette machine to produce cigarette B2.

[0122] Comparative Example 4

[0123] Comparative Example 4 is cigarette C4. Compared with Experimental Example 3, Comparative Example 4 differs in that the filler of the filter rod is composed only of tow, and the other conditions are the same.

[0124] Performance Testing

[0125] In accordance with the "YC / T138-1998 Sensory Evaluation Standard for Tobacco and Tobacco Products", a smoking evaluation panel consisting of 10 smoking evaluation experts was organized to evaluate cigarettes containing the composite slow-release particles with a color-changing function of the present invention. At the same time, the same cigarettes without the composite slow-release particles with a color-changing function of the present invention were also evaluated, and the average value was taken.

[0126] The cigarettes of Test Examples 1-2 and Comparative Examples 1-3 were subjected to performance tests. The test results are shown in Table 1 below:

[0127] Table 1 Cigarette performance test results of Test Examples 1-2 and Comparative Examples 1-3

[0128]

[0129] As shown in the test results in Table 1, the color-changing composite slow-release particles produced in the present embodiment of the present invention, when added to cigarettes, provide a persistent, minty, cooling flavor. During the puff, the particles can be seen changing from black to yellow within the visible window of the cigarette filter tube. Comparative Example 1, on the other hand, lacks a distinctive aroma and visual sensory experience when puffed. Furthermore, when an excessive amount of the temperature-sensitive colorant mixture is added, or when the temperature-sensitive colorant mixture is directly mixed with a bio-polymer composite flavor slow-release wet substrate to produce the composite slow-release particles, the performance test results are poor.

[0130] The cigarettes of Test Examples 3-4 and Comparative Example 4 were subjected to performance tests. The test results are shown in Table 2 below:

[0131] Table 2 Cigarette performance test results of Test Examples 3-4 and Comparative Example 4

[0132]

[0133] The test results in Table 2 show that when the color-changing composite sustained-release particles prepared in the present embodiment are added to cigarettes, users experience a long-lasting, cooling mint flavor. During the puff, the particles can be seen changing from black to yellow within the visible window on the cigarette filter tube. Comparative Example 4, on the other hand, lacks a distinctive aroma and visually appealing experience.

[0134] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for preparing composite sustained-release particles with color-changing function, characterized in that: The following steps are involved: Step (1): uniformly mixing the bio-fermentation carrier, the bioactive agent and water to form a paste-like mixture; Step (2): placing the paste mixture obtained in step (1) in a fermentation environment for fermentation to form a bio-fermentation porous flavor carrier; Step (3): stirring the bio-fermented porous flavor carrier obtained in step (2), and then irradiating it with an ultraviolet lamp to obtain an inactivated bio-porous flavor carrier; Step (4): adding flavor essence to the inactivated biological porous flavor carrier obtained in step (3) to obtain a flavored biologically active sustained-release body; Step (5): melting the polymer flavor carrier, water and pigment under heating conditions and stirring them evenly to obtain a gel solution; Step (6): After the gel solution obtained in step (5) is cooled, flavoring is added to the gel solution to obtain a flavored sustained-release gel solution; Step (7): fully mixing the flavoring bioactive sustained-release body obtained in step (4) with the flavoring sustained-release gel solution obtained in step (6), stirring evenly to obtain a bio-polymer composite flavor sustained-release wet substrate; Step (8): granulating the bio-polymer composite flavor sustained-release wet substrate obtained in step (7) to form a granular structure, taking it out and drying it to obtain a bio-polymer composite sustained-release flavor pellet core; Step (9): screening the bio-polymer composite slow-release flavor pellets to obtain pellets with the desired particle size; Step (10): placing the pellets of the desired particle size obtained in step (9) into a rotary coating pan and rotating them for sphericalization, then spraying a wetting agent and continuing to rotate to obtain the pellets in the rotary coating pan; Step (11): uniformly mixing the temperature-sensitive color powder and the powder binder to obtain a temperature-sensitive color powder mixture; Step (12): Sprinkle the temperature-sensitive color powder mixture obtained in step (11) on the pellet cores in the rotary coating pan in step (10), so that the temperature-sensitive color powder mixture is evenly adhered to and coated on the pellet cores in the rotary coating pan to form a temperature-sensitive color-changing layer, thereby obtaining pellet cores coated with the mixture; Step (13): allowing the pellet cores coated with the mixture obtained in step (12) to continue rotating in the rotary coating pan until the pellet cores coated with the mixture with high roundness are obtained, and then taking them out and drying them to obtain the composite sustained-release particles with color-changing function.

2. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (1), the biofermentation carrier is selected from one or more of porous starch, amylose, corn starch, sweet potato starch, wheat flour, microcrystalline cellulose, and agar; the bioactive agent is selected from one or more of Lactobacillus bulgaricus, budding yeast, Acetobacter aceti, Debaryomyces hansenii, Bifidobacterium, and lactose; and the weight ratio of the biofermentation carrier, the bioactive agent, and water is (30-95): (0.5-15): (10-50).

3. The method for preparing the composite sustained-release granules with color-changing function according to claim 1, wherein: In step (4), the flavor is selected from one or more of fruit flavor, tea flavor, floral flavor, mint flavor, and coffee flavor; and the amount of flavor added is 2-20 wt% of the mass of the inactivated biological porous flavor carrier.

4. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (5), the polymer flavor carrier is selected from one or more of natural pectin, gum arabic, polyethylene glycol 4000, polyethylene glycol 6000, and stearic acid; the pigment is selected from one or more of lemon yellow, sunset red, fruit green, and brilliant blue; and the weight ratio of the polymer flavor carrier, water, and pigment is (40-90): (5-20): (0.01-4).

5. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (6), the amount of flavor added is 2-16% of the mass of the gel solution, and the flavor is selected from one or more of fruit flavor, tea flavor, floral flavor, mint cooling flavor, and coffee flavor; in step (7), the mass ratio of the flavored bioactive sustained-release body to the flavored sustained-release gel solution is (3-7):(5-7).

6. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (10), the wetting agent is selected from one or more of ethanol, propylene glycol, glycerol, and water; the mass of the wetting agent is 2-13% of the mass of the pellet core with the desired particle size.

7. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (11), the powder binder is selected from one or more of sodium carboxymethyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, polyacrylic acid resin, and sodium alginate; the temperature-sensitive color powder is selected from one or more of black-to-white color-changing powder, red-to-white color-changing powder, green-to-white color-changing powder, brown-to-white color-changing powder, and purple-to-white color-changing powder; the weight ratio of the temperature-sensitive color powder to the powder binder is (2-10):(1-3); in step (12), the mass of the temperature-sensitive color powder mixture is 2-6% of the mass of the pill cores in the rotary coating pan.

8. The method for preparing composite sustained-release particles with color-changing function according to claim 1, wherein: In step (13), the pellet cores coated with the mixture having a high roundness mean that the percentage difference between the longest diameter and the shortest diameter is 3-8%.

9. A composite sustained-release granule with color-changing function, characterized in that: The composite sustained-release particles with color-changing function are prepared by the preparation method of any one of claims 1 to 8.

10. Use of the composite slow-release particles with color-changing function in cigarette filter rods according to claim 9, characterized in that: The mass of the composite slow-release particles with color-changing function is 10-30% of that of the cigarette filter rod.

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