Cellulose core wire for cigarette perfuming and preparation method thereof

Abstract

The invention relates to the technical field of cigarette perfuming, in particular to a cellulose core wire for cigarette perfuming and a preparation method of the cellulose core wire. The preparation method comprises the following steps: dipping a core wire in an essence solution, taking out the core wire after dipping, and drying to obtain the cellulose core wire for cigarette perfuming, the core yarn is made of pure viscose yarn with the linear density of 110-120 tex, the S twist and the twist degree of 60-110 twists per meter. In the essence solution, essence components comprise isoamyl isovalerate, ethyl butyrate and farnesol, and a solvent is ethanol. According to the preparation method, the stability and uniformity of the incense line in subsequent use are remarkably improved, and the consistency of essence loading and releasing is guaranteed; in addition, the prepared cellulose core wire has excellent performance and good on-machine applicability, and the situation that the cellulose core wire is seriously deformed or broken or the like is not prone to occurring in the process of being implanted into cigarette components.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette flavoring, in particular to a cellulose core wire for cigarette flavoring and a preparation method thereof. Background Art

[0002] As a traditional consumer product, the aroma and taste of cigarettes have always been a key focus for consumers. With the increasing pursuit of health and quality, low-tar, low-hazard, and high-aroma cigarettes are becoming the market trend. Flavoring technology is a key means of improving cigarette quality during the production process. Traditional methods of flavoring cigarettes include directly adding flavorings to tobacco, adding microcapsules to filters, or flavoring filters. However, these methods have limitations, such as uneven flavor release and the volatilization and loss of flavoring compounds.

[0003] With the recent development of new materials technologies, cellulose cores have gradually gained attention as a novel flavoring carrier for cigarettes. Cellulose cores possess excellent adsorption and biocompatibility, effectively loading flavorings and slowly releasing the flavor during smoking, thereby improving the aroma quality and smoking experience. However, existing cigarette cores suffer from the following issues: Firstly, flavor release is uneven between the front and back sections of the core, impacting the smoking experience; secondly, the cores have poor mechanical properties, making them prone to breakage during insertion into cigarette components. Summary of the Invention

[0004] In order to solve or partially solve the problems existing in the related art, the present invention provides a cellulose core wire for flavoring cigarettes and a preparation method thereof.

[0005] The present invention provides a method for preparing a cellulose core thread for flavoring cigarettes, which comprises: The core wire is immersed in the flavor solution, and after the dipping is completed, it is taken out and dried to obtain a cellulose core wire for flavoring cigarettes; The core yarn is made of pure viscose yarn with a linear density of 110-120 tex, S twist, and a twist of 60-110 twists / m; In the flavor solution, the flavor components include isopentyl isovalerate, ethyl butyrate and farnesol, and the solvent is ethanol.

[0006] Furthermore, in the flavor component, the mixing mass ratio of isopentyl isovalerate, ethyl butyrate and farnesol is 1-5:1-3:1-5.

[0007] Furthermore, in the flavor solution, the solvent is anhydrous ethanol, and the mixing mass ratio of the flavor component to the anhydrous ethanol is 1-20:100.

[0008] Furthermore, the impregnation is carried out under shaking conditions.

[0009] Furthermore, the immersion temperature is 20-50° C., and the immersion time is 5-30 hours.

[0010] Furthermore, the mass volume ratio of the core wire and the essence solution is 300 mg: 10-20 mL.

[0011] The present invention also provides a cellulose core thread for flavoring cigarettes, which is prepared according to any one of the methods described above.

[0012] Furthermore, the dry breaking strength of the cellulose core yarn is 2050-2420 cN, and the dry breaking elongation is 17%-23%; the wet breaking strength is 1100-1220 cN, and the dry breaking elongation is 20%-26%.

[0013] The present invention also provides a cigarette filter provided with the above-mentioned cellulose core wire.

[0014] The present invention also provides a cigarette provided with the filter tip.

[0015] The cellulose core wire for cigarette flavoring and the preparation method thereof provided by the present invention can have the following beneficial effects: 1) This preparation method selects viscose fiber with specific linear density, twist type and twist number as the core wire. Its good flexibility and chemical stability lay a solid foundation for subsequent modification.

[0016] 2) The fragrance component is a compound of isopentyl isovalerate, ethyl butyrate and farnesol. The impregnation method is used to allow the fragrance to be fully adsorbed onto the active sites of the fiber, ensuring a uniform and stable fragrance load, which greatly enhances the aroma release effect of the fragrance thread.

[0017] 3) This preparation method significantly improves the stability and uniformity of the flavor thread in subsequent use, ensuring the consistency of flavor loading and release. The prepared cellulose core thread also has excellent performance, good applicability on the machine, and is not prone to severe deformation or breakage during implantation into cigarette components.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0020] Figure 1is a longitudinal structural diagram of the cellulose core yarn prepared in Examples 1-6 of the present invention; Figure 2 1 is a static contact angle diagram of the cellulose core wire prepared in Examples 1-6 of the present invention; Figure 3 This is a test graph of the adsorption capacity of the cellulose core wire at different solute-solvent ratios in Example 7 of the present invention; Figure 4 This is a test graph of mass loss of cellulose core yarn under different solute-solvent ratios in Example 7 of the present invention; Figure 5 This is a test chart of the adsorption amount of the cellulose core yarn at different immersion times in Example 8 of the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0024] A first embodiment of the present invention provides a method for preparing a cellulose core thread for flavoring cigarettes, comprising: The core wire is immersed in the flavor solution, and after the dipping is completed, it is taken out and dried to obtain a cellulose core wire for flavoring cigarettes; The core yarn is made of pure viscose yarn with a linear density of 110-120tex, S twist, and a twist of 60-110 twists / m; In the flavor solution, the flavor components include isopentyl isovalerate, ethyl butyrate and farnesol, and the solvent is ethanol.

[0025] The cellulose core yarn prepared in this example uses pure viscose yarn as its base material. Viscose fiber is made from natural cellulose, and its molecular chains are connected by β-1,4 glycosidic bonds. During combustion, it produces only carbon dioxide and water, without toxic substances such as polycyclic aromatic hydrocarbons. This reduces the levels of toxic and harmful substances such as benzo[a]pyrene in cigarette smoke during combustion, improving user safety. The hydroxyl groups of cellulose efficiently adsorb fragrance molecules through hydrogen bonds and van der Waals forces, forming a stable adsorption layer. This helps increase the core yarn's adsorption capacity and improves the stability of this adsorption.

[0026] This embodiment utilizes pure viscose yarn of specific specifications: a linear density of 110-120 tex, S-twist, and a twist of 60-110 twists / meter. The S-twist structure matches the pulling direction of the cigarette making machine, reducing the risk of untwisting and thus maintaining the structural density of the core yarn. The linear density affects the final diameter and specific surface area of ​​the core yarn, which has a significant impact on appearance, adsorption, mechanical strength, and machine suitability. The appropriate twist can enhance fiber cohesion and control fiber flexibility, thereby optimizing the mechanical properties of the core yarn. A linear density of 110-120 tex and a twist of 60-110 twists / meter are used to synergistically enhance fiber cohesion and improve the mechanical properties of the core yarn, such as dry breaking strength, dry breaking elongation, wet breaking strength, and wet breaking elongation, enhancing its machine suitability, allowing it to withstand the high-speed pulling forces of the cigarette making machine and maintain a good shape during insertion into cigarette components. Furthermore, the above-mentioned design specifications improve the mechanical properties of the core yarn while maintaining its adsorption capacity for flavors, thereby improving the uniformity of flavor release.

[0027] As a preferred embodiment of the present invention, the core density is 112.2-116.4 tex, specifically 112.2 tex, 116.4 tex, 114.6 tex, 114 tex, 116.2 tex, 113.4 tex, etc. The twist is preferably 60-106 twists / m. Within this range, the core fiber gap rate can retain the adsorption micropores while avoiding the loose fibers caused by too low twist. The preferred twist can be 64 twists / m, 80 twists / m, 86 twists / m, 87 twists / m, 101 twists / m, 106 twists / m, etc., more preferably 70-90 twists / m, further preferably 80-87 twists / m, and most preferably 80, 86, and 87 twists / m.

[0028] The flavor component used in this embodiment is a compound of three compounds, namely isopentyl isovalerate, ethyl butyrate and farnesol. After compounding, these three compounds have a natural fruity aroma and good sensory evaluation. In addition, it has good compatibility with the core wire selected in the application. Farnesol forms hydrogen bonds with cellulose through hydroxyl groups and is preferentially adsorbed on the fiber surface; isopentyl isovalerate and ethyl butyrate fill micropores through hydrophobic interaction, and the compound components balance the release rate through competitive adsorption. The boiling point of isopentyl isovalerate is 190.5-193°C, the boiling point of ethyl butyrate is 122.4°C, and the boiling point of farnesol is 283.37°C. The boiling point distribution and difference of the three compounds can achieve a gradient release of flavor in the front, middle and back sections during cigarette smoking, thereby improving the persistence of flavor release. As a preferred embodiment of the present invention, the mass ratio of isopentyl isovalerate, ethyl butyrate and farnesol in the flavor component is 1-5:1-3:1-5, more preferably 1:1:1-2, specifically 1:1:1, 1:1:2, etc., and most preferably 1:1:2.

[0029] In the flavor solution, the solvent is preferably anhydrous ethanol, and the mass ratio of the flavor component to anhydrous ethanol (i.e., the solute-solvent ratio, all solute-solvent ratios described herein are mass ratios) is preferably 1-20:100, and specifically can be 1:100, 2:100, 4:100, 6:100, 10:100, or 20:100. The inventors of this application have discovered that the initial content of the flavor component in the flavor solution significantly affects the amount of flavor adsorbed by the core yarn. In the flavor solution, the solute-solvent ratio is positively correlated within the range of 1.0% to 10.0%, and the adsorption capacity increases with increasing initial concentration. Therefore, the mass ratio of the flavor component to anhydrous ethanol is further preferably 6-20:100, and most preferably 10:100.

[0030] The flavor solution can be prepared as follows: Isoamyl isovalerate, ethyl butyrate, and farnesol are mixed in a predetermined mass ratio, and then anhydrous ethanol is added and stirred evenly to obtain the product. The stirring speed is preferably 200-600 rpm, and the stirring mixing time is preferably 20-40 minutes; more preferably, the stirring speed is 500 rpm, and the stirring mixing time is 30 minutes.

[0031] In this embodiment, the fragrance is adsorbed onto the core wire by impregnation. Preferably, the impregnation is performed under oscillation. Oscillation adsorption has the following advantages: oscillation disrupts the static boundary layer of the fragrance solution through mechanical disturbance, allowing the fragrance molecules in the solution to fully contact the cellulose fibers; it promotes rapid penetration of the fragrance molecules into the fibers, reducing their exposure time on the surface of the solution; the continuous movement of the fibers during oscillation prevents localized excessive swelling or deformation; and it shortens the process cycle and reduces energy consumption.

[0032] The impregnation temperature is preferably 20-50°C, and the time is preferably 5-30 hours. The impregnation temperature is more preferably 25-45°C, and specifically can be 25, 35, or 45°C. The applicant has found through research that within the range of 25-45°C, the amount of flavor adsorption increases with increasing temperature. However, increasing temperature causes volatility loss of flavor components, and excessively high temperatures accelerate the movement of cellulose molecular chains, causing deformation of the core structure. Therefore, the impregnation temperature is further preferably 30-40°C, and most preferably 35°C, taking into account both process stability and flavor integrity, achieving the best balance between technical effect and industrial feasibility. The impregnation time can be specifically 5h, 6h, 9h, 12h, 24h, or 30h, preferably 6-12h, and most preferably 9h. During the impregnation process, the mass-to-volume ratio of the core to the flavor solution is preferably 300mg:10-20mL, and more preferably 300mg:15mL.

[0033] The second embodiment of the present invention provides a cellulose core for flavoring cigarettes, which is prepared according to the method described in the first embodiment. The specific implementation method is the same as the above content and is not repeated here. Preferably, the dry breaking strength of the cellulose core is 2050-2420 cN, and the dry breaking elongation is 17% to 23%; the wet breaking strength is 1100-1220 cN, and the dry breaking elongation is 20% to 26%. Further preferably, the properties of the cellulose core are as follows: dry breaking strength is 2053-2413.90 cN, and the dry breaking elongation is 17.37% to 22.06%; wet breaking strength is 1106.3-1203 cN, and the dry breaking elongation is 20.23% to 25.10%. Most preferably, the dry breaking strength of the cellulose core yarn is 2280-2415 cN, and the dry breaking elongation is 20% to 22%; the wet breaking strength is 1160-1203 cN, and the dry breaking elongation is 22% to 25%.

[0034] A third embodiment of the present invention provides a cigarette filter provided with the above-mentioned cellulose core thread.

[0035] A fourth embodiment of the present invention provides a cigarette equipped with the filter of the third embodiment. Specifically, the cigarette includes a filter and a tobacco segment. The cigarette is a traditional combustion cigarette or a heat-not-burn cigarette.

[0036] As can be seen from the above, the cellulose core yarn for cigarette flavoring and the preparation method thereof provided in the embodiments of the present invention have the following advantages: 1) This preparation method selects viscose fiber with specific linear density, twist type and twist number as the core wire. Its good flexibility and chemical stability lay a solid foundation for subsequent modification.

[0037] 2) The fragrance component is a compound of isopentyl isovalerate, ethyl butyrate and farnesol. The impregnation method is used to allow the fragrance to be fully adsorbed onto the active sites of the fiber, ensuring a uniform and stable fragrance load, which greatly enhances the aroma release effect of the fragrance thread.

[0038] 3) This preparation method significantly improves the stability and uniformity of the flavor thread in subsequent use, ensuring the consistency of flavor loading and release. The prepared cellulose core thread also has excellent performance, good applicability on the machine, and is not prone to severe deformation or breakage during implantation into cigarette components.

[0039] The technical solution of the present invention will be further described below in conjunction with specific embodiments: The test methods involved in the following embodiments are as follows: 1. Linear density test: refer to GB / T 7690.1-2013.

[0040] 2. Twist test: refer to GB / T 2543.1-2015.

[0041] 3. Breaking strength and breaking elongation test: refer to ASTM D5034-09 (2017).

[0042] 4. Static contact angle test: The sessile drop method is the primary method for measuring static contact angles. Liquid is slowly added to the end of a syringe to form a droplet of a specified volume. The droplet is then transferred to the surface of the sample to be measured. Once the droplet is transferred, the contact angle can be measured. The measurement medium used is deionized water, the drop volume is 10 μL, and the reading is taken 5 seconds after addition. The instrument used is a German Dataphysics DCAT21.

[0043] 5. Test of adsorption capacity: The solution concentration at different times was obtained through the gas phase spectrum and the adsorption amount was calculated to obtain the kinetic adsorption curve.

[0044] The GC-MS analysis conditions are as follows: Gas phase conditions: DB-Wax column (30 m*250 μm*0.25 μm); inlet temperature of 250 °C, split ratio of 30:1; carrier gas: He; column flow rate of 1.0 mL / min; temperature program: 50 °C (hold for 3 min), 15 °C / min to 160 °C (hold for 5 min), 40 °C / min to 220 °C (hold for 5 min), 40 °C / min to 240 °C and hold for 5 min.

[0045] Mass spectrometry conditions were as follows: electron impact ion source (EI), electron energy 70 eV; scan mode and SIM; mass scan range 33-500; ion source temperature 230 °C, quadrupole temperature 150 °C, transfer line temperature 280 °C; solvent delay 3.7 min.

[0046] 6. Desorption test: Thermogravimetric analysis was used to obtain the flavor mass loss of the core wire in the temperature range of 25~250 ℃.

[0047] The raw materials used in the following examples and comparative examples can all be purchased from the market.

[0048] Example 1 Pure viscose yarn with a linear density of 112.2tex, S twist and twist of 80 twists / m is used as the core yarn; Isoamyl isovalerate, ethyl butyrate, and farnesol were mixed in a mass ratio of 1:1:2, and then anhydrous ethanol was added. The mass ratio of the sum of the mass of isovalerate, ethyl butyrate, and farnesol (solute) to ethanol (solvent) was 10:100. The mixture was then mixed at 25°C and 500 rpm for 30 minutes to form a flavor solution with a solute-solvent ratio of 10%. 300 mg of core wire was immersed in 15 mL of flavor solution, and adsorbed under shaking at 35° C. for 9 h. The core wire was taken out and naturally air-dried at room temperature to obtain a cellulose core wire for cigarette flavoring.

[0049] Example 2 The specifications of the pure viscose yarn in Example 1 were adjusted to 116.4 tex, S twist, and 101 twists / m, while other specifications remained the same as in Example 1 to obtain a cellulose core yarn.

[0050] Example 3 The specifications of the pure viscose yarn in Example 1 were adjusted to 114.6 tex, S twist, and 64 twists / m, while other specifications remained the same as in Example 1 to obtain a cellulose core yarn.

[0051] Example 4 The specifications of the pure viscose yarn in Example 1 were adjusted to 114 tex, S twist, and 86 twists / m, while other specifications remained the same as in Example 1 to obtain a cellulose core yarn.

[0052] Example 5 The specifications of the pure viscose yarn in Example 1 were adjusted to 116.2 tex, S twist, and 106 twists / m, while other specifications remained the same as in Example 1 to obtain a cellulose core yarn.

[0053] Example 6 The specifications of the pure viscose yarn in Example 1 were adjusted to 113.4 tex, S twist, and 87 twists / m, while other specifications remained the same as in Example 1 to obtain a cellulose core yarn.

[0054] The longitudinal structure of the cellulose core yarn prepared in Example 1-6 is shown in FIG. Figure 1 As shown. Figure 1 It can be seen that the cellulose core fibers prepared in each example are tightly arranged and orderly, with no noticeable hairiness on the yarn surface. The S-twist structure significantly enhances the fiber cohesion. This densified longitudinal structure helps improve the mechanical strength of the core, while the retained microporous structure provides a sufficient surface area for flavor adsorption.

[0055] The static contact angle diagram of the cellulose core wire prepared in Examples 1-6 is as follows: Figure 2 As shown. Figure 2 It can be seen that the static contact angles of the cellulose cores prepared in Examples 1-6 are 76.1, 97.9, 32.2, 0, 138.7, and 36.6°, respectively. Figure 2 It can be seen that by adjusting the density and twist number of the S-twisted core yarn, the surface wettability of the cellulose core yarn can be adjusted, and then the flavor adsorption and sustained release performance can be adjusted.

[0056] The cellulose core yarns obtained in Examples 1-6 were subjected to mechanical property tests, and the test results are as follows: Table 1 Breaking strength and elongation of fiber core in dry and wet state

[0057] It can be seen from Table 1 that the cellulose core yarn prepared in the above embodiment has excellent mechanical properties.

[0058] The specific surface area and flavor adsorption capacity of the cellulose core yarns obtained in Examples 1-6 were tested. The test results are shown in Table 2: Table 2 Specific surface area of ​​cellulose core yarn and flavor adsorption capacity

[0059] It can be seen from Table 2 that the cellulose core yarn prepared in the above embodiment has a larger specific surface area and a higher adsorption capacity for flavors.

[0060] Example 7 The solute-solvent ratio of the flavor solution in Example 1 was adjusted to 1.0%, 2.0%, 4.0%, 6.0%, 10.0% (Example 1), and 20.0%, respectively, while the other ratios remained the same as in Example 1 to obtain a cellulose core yarn.

[0061] The obtained cellulose core was subjected to an adsorption performance test, and the test results are as follows: Figure 3The test results of the adsorption capacity of cellulose core wire under different solute-solvent ratios are shown in Figure 2. Figure 3 It can be seen that the initial content of the fragrance solution significantly affects the amount of fragrance adsorbed by the core wire. A positive correlation is observed between the solute-to-solvent ratio of 1.0% and 10.0% in the fragrance solution, and the adsorption capacity increases with increasing initial concentration. At a fragrance adsorption solution concentration of 10.0%, the adsorption capacity remains essentially unchanged.

[0062] The obtained cellulose core yarn was subjected to a desorption performance test, and the test results are as follows: Figure 4 The test results of mass loss of cellulose core wire under different solute-solvent ratios are shown in Figure 2. Figure 5 It can be seen that in the flavor solution, when the solute-solvent ratio is in the range of 1.0 ~ 4.0%, the mass loss of the core wire is not obvious. As the solute-solvent ratio increases to 6.0%, the mass loss increases significantly.

[0063] Example 8 The immersion time of the flavor solution in Example 1 was adjusted to 1 min, 5 min, 10 min, 20 min, 30 min, 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 9 h, 12 h, and 24 h, respectively. The solvent-solute ratio of the flavor solution was 4%, and the rest was consistent with Example 1 to obtain a cellulose core yarn.

[0064] The obtained cellulose core was subjected to an adsorption performance test, and the test results are as follows: Figure 5 The test results of the adsorption capacity of cellulose core wire under different immersion times are shown in Figure 2. Figure 4 It can be seen that the adsorption rate is relatively high in the first 540 minutes; at the same time, the curve gradually becomes flat after 540 minutes, indicating that the adsorption is close to saturation, so the adsorption rate slows down.

[0065] Example 9 The temperatures of the flavor solutions in Example 1 were adjusted to 25 and 45° C., respectively, and the other conditions remained the same as in Example 1 to obtain cellulose core yarns.

[0066] The obtained cellulose core was subjected to an adsorption performance test, and the test results are shown in Table 3: Table 3. Adsorption amount of flavor at different temperatures

[0067] Table 3 shows that within the 25-45°C range, the amount of flavor adsorption increases with increasing temperature. However, considering the volatility loss of flavor components as temperature rises, and the fact that excessively high temperatures accelerate the movement of cellulose molecular chains, leading to structural deformation of the core, the preferred temperature for this application is around 35°C. For example, 30-40°C ensures adsorption kinetics while also balancing process stability and flavor integrity, achieving the optimal balance between technical effectiveness and industrial feasibility.

[0068] Example 10 The isopentyl isovalerate, ethyl butyrate and farnesol in Example 1 were adjusted to be mixed in a mass ratio of 1:1:1, while other conditions remained the same as in Example 1 to obtain a cellulose core yarn.

[0069] Comparative Example 1 The essence in Example 1 was adjusted to be only isopentyl isovalerate, and the other ingredients remained the same as in Example 1 to obtain a cellulose core yarn.

[0070] Comparative Example 2 The essence in Example 1 was adjusted to be only farnesol, and the other ingredients were kept the same as in Example 1 to obtain a cellulose core yarn.

[0071] The cellulose core yarns obtained in Example 10 and Comparative Examples 1-2 were subjected to performance tests. The test results are shown in Table 4: Table 4 Fragrance adsorption amount of different flavor components

[0072] Depend on Figure 4 It can be seen that the core wire has different adsorption capacities for different flavor compounds, and has the highest adsorption capacity for farnesol.

[0073] Example 11 Prepare cigarette filters as follows: The cellulose core wire of Example 1 was implanted into the industrialized forming step of the cigarette filter to obtain a cigarette core wire mouthpiece with a forming specification of 120 mm.

[0074] The obtained cigarette core tip rod was subjected to performance testing, and the test results are as follows: The average draw resistance is 1000Pa, the moisture content is 1.8mg, and the puff count is 8mg; the aroma is long-lasting and stable, the aftertaste is clean, and the smoke concentration is high; on the basis of conventional cigarettes, a long-lasting and stable aroma is added.

[0075] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for preparing a cellulose core for flavoring cigarettes, characterized in that: include: The core wire is immersed in the flavor solution, and after the dipping is completed, it is taken out and dried to obtain a cellulose core wire for flavoring cigarettes; The core yarn is made of pure viscose yarn with a linear density of 110-120 tex, S twist, and a twist of 60-110 twists / m; In the flavor solution, the flavor components include isopentyl isovalerate, ethyl butyrate and farnesol, and the solvent is ethanol.

2. The preparation method according to claim 1, characterized in that In the flavor component, the mixing mass ratio of isopentyl isovalerate, ethyl butyrate and farnesol is 1-5:1-3:1-5.

3. The preparation method according to claim 1, characterized in that In the flavor solution, the solvent is anhydrous ethanol, and the mixing mass ratio of the flavor component to the anhydrous ethanol is 1-20:

100.

4. The preparation method according to claim 1, characterized in that The impregnation is carried out under shaking conditions.

5. The preparation method according to claim 1, characterized in that The immersion temperature is 20-50° C., and the immersion time is 5-30 hours.

6. The preparation method according to claim 1, characterized in that The mass volume ratio of the core wire and the essence solution is 300 mg: 10-20 mL.

7. A cellulose core for flavoring cigarettes, characterized in that: It is prepared according to the method according to any one of claims 1 to 6.

8. The cellulose core yarn according to claim 7, characterized in that The dry breaking strength of the cellulose core yarn is 2050-2420 cN, and the dry breaking elongation is 17%-23%; the wet breaking strength is 1100-1220 cN, and the dry breaking elongation is 20%-26%.

9. A cigarette filter, characterized in that: It is provided with the cellulose core thread according to claim 7 or 8.

10. A cigarette, characterized in that: The filter is provided with the filter according to claim 9.

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