A filter rod core material for cigarettes, its preparation method and application

Abstract

This invention provides a cigarette filter rod core material, its preparation method, and its application. The cigarette filter rod core material includes a base layer and a coating layer; the base layer includes reconstituted tobacco leaves; the reconstituted tobacco leaves are formulated with tobacco powder, fiber, and additives; the coating layer includes polylactic acid, latex, and foam ceramics. The cigarette filter rod core material of this invention is a core material obtained primarily from polylactic acid and reconstituted tobacco leaves in the coating layer. It possesses both good tar reduction and cooling effects, and the polylactic acid membrane does not collapse after heating. Furthermore, the reconstituted tobacco leaves have a low fiber content, thus having no negative impact on sensory quality.

Description

Technical Field

[0001] This invention belongs to the field of cigarette filter rod technology, specifically relating to a filter rod core material for cigarettes, its preparation method, and its application. Background Technology

[0002] With increasing concern about smoking and health, consumers are becoming more aware of the harmful effects of cigarettes. Cigarettes release harmful chemicals during combustion, and filters are needed to remove and reduce these harmful components for consumer health. Currently available filters are mainly made of acetate fiber and paper. Acetate fiber filters are not easily biodegradable, causing environmental pollution. Paper filters are environmentally friendly and have good tar reduction properties, but they have a noticeable odor. Therefore, the selection of filter material has become a primary goal in cigarette production.

[0003] CN112641125A discloses a reconstituted tobacco paper filter rod and a method for preparing the filter rod. Using ultrafine tobacco powder as raw material, a coating liquid is obtained through extraction, solid-liquid separation, concentration, and blending processes. A blank base paper is obtained through a papermaking process. The base paper is coated to obtain a coated sample. The coated sample is dried, rolled, slit, and rewound to obtain a base paper product suitable for processing into paper filter rods. The base paper is then embossed or shredded, and finally rolled using a gathering and forming process to obtain the paper filter rod product. The paper filter rod product prepared by this method not only retains the advantages of traditional paper filter rods but also possesses the characteristics of natural tobacco aroma components, increasing the tobacco elements in cigarettes. Furthermore, it is adjustable and controllable, giving cigarettes more functionality, thus possessing significant advantages in terms of economic cost and environmental protection.

[0004] CN115506041A discloses a method for preparing polylactic acid (PLA) fiber filter rods with good temperature resistance, comprising the following steps: selecting at least two qualified PLA raw materials with levorotatory isotope content within a predetermined range; selecting the qualified PLA raw material with the highest levorotatory isotope content to obtain a core component; selecting the qualified PLA raw material with the lowest levorotatory isotope content to obtain a sheath component; coating the sheath component onto the outside of the core component to form a sheath-core type PLA fiber bundle; and forming multiple sheath-core type PLA fiber bundles to obtain a PLA filter rod. This invention is simple and convenient. By controlling the proportion and preparation of PLA raw materials, a multi-layered sheath-core type PLA fiber is obtained, improving the uniformity of its inner structure. The resulting PLA fiber filter rod is stable to cut, and the fiber bundle exhibits a gradual change in crystallinity and temperature resistance from the inside to the outside, resulting in better temperature resistance of the entire filter rod and improved filtration performance of the PLA fiber bundle.

[0005] However, the above-mentioned filter rods have limited adsorption of tar in cigarette smoke or have a noticeable papery smell. Therefore, developing an environmentally friendly cigarette filter rod that also has good tar reduction and cooling effects and excellent sensory quality is an urgent problem to be solved by the tobacco industry. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a filter rod core material for cigarettes, its preparation method and application.

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

[0008] In a first aspect, the present invention provides a filter rod core material for cigarettes, the filter rod core material for cigarettes comprising a base layer and a coating layer;

[0009] The base layer includes reconstituted tobacco leaves;

[0010] The reconstituted tobacco formulation includes tobacco powder, fiber, and additives;

[0011] The coating layer comprises polylactic acid, latex, and foam ceramic.

[0012] The base layer of the cigarette filter rod core material of this invention is made of reconstituted tobacco, and the coating layer includes polylactic acid. The reconstituted tobacco effectively adsorbs tar from cigarette smoke, while polylactic acid effectively reduces the temperature of the smoke. The combination of these two components provides both excellent tar reduction and cooling effects. Simultaneously, the supporting effect of the reconstituted tobacco prevents the polylactic acid membrane from collapsing when heated, and the supporting effect of polylactic acid enhances the tear resistance of the reconstituted tobacco, facilitating subsequent processing such as embossing, folding, rolling, and cutting. Furthermore, foam ceramic is added to the coating layer. Foam ceramic is a porous ceramic body with a three-dimensional spatial network structure and high porosity. It possesses high porosity, large specific surface area, chemical corrosion resistance, and good mechanical strength and filtration adsorption performance, which can improve the adsorption performance of polylactic acid.

[0013] Preferably, the thickness of the coating layer is 0.01-0.3 mm, for example, it can be 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm or 0.28 mm, etc.

[0014] Preferably, the thickness of the base layer is 0.1-0.5 mm, for example, it can be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm or 0.45 mm, etc.

[0015] Preferably, the reconstituted tobacco leaf formulation comprises, by weight, 70-95 parts tobacco powder, 0.5-10 parts fiber, and 5-30 parts additives.

[0016] The amount of tobacco powder added can be 76 parts, 78 parts, 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, or 94 parts, etc.

[0017] The amount of fiber added can be 0.8 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts or 9 parts, etc.;

[0018] The amount of the additive can be 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, or 28 parts, etc.

[0019] Preferably, by weight, the coating layer comprises 90-100 parts polylactic acid, 0.5-3 parts latex, and 1-5 parts foam ceramic.

[0020] The amount of polylactic acid added can be 91 parts, 92 parts, 93 parts, 94 parts, 95 parts, 96 parts, 97 parts, 98 parts, or 99 parts, etc.

[0021] The amount of latex added can be 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, or 2.8 parts, etc.;

[0022] The amount of foam ceramic added can be 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts or 4.5 parts, etc.

[0023] Preferably, the tobacco powder includes any one or a combination of at least two of flue-cured tobacco powder, burley tobacco powder, or aromatic tobacco powder.

[0024] Preferably, the tobacco powder comprises a combination of flue-cured tobacco powder, burley tobacco powder, and aromatic tobacco powder.

[0025] The reconstituted tobacco leaves of this invention use a combination of flue-cured tobacco powder, burley tobacco powder, and aromatic tobacco powder. By adjusting the proportion of different types of tobacco powder, the reconstituted tobacco leaves can be endowed with different styles of smoke characteristics and aromas. In addition, by utilizing the sheet-forming characteristics of different types of tobacco powder and adjusting the particle size of the tobacco powder, reconstituted tobacco leaves with higher surface roughness and more porous internal structures can be obtained.

[0026] Preferably, the mass ratio of the flue-cured tobacco powder, burley tobacco powder, and spice tobacco powder is (2-4):(0.5-1):(1-3).

[0027] Where “2-4” can be 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6 or 3.8, etc.;

[0028] "0.5-1" can be 0.6, 0.7, 0.8, 0.9, or 1, etc.

[0029] “1-3” can be 1.1, 1.3, 1.5, 1.7, 1.9, 2, 2.1, 2.3, 2.5, 2.7 or 2.9, etc.

[0030] Preferably, the additive includes any one or a combination of at least two of glycerol, sodium carboxymethyl cellulose, guar gum, or konjac flour.

[0031] Preferably, the additive is a combination of glycerol and sodium carboxymethyl cellulose.

[0032] In this invention, glycerol and sodium carboxymethyl cellulose are selected as additives. Sodium carboxymethyl cellulose acts as a binder to bond tobacco powder and fibers, forming reconstituted tobacco leaves. Glycerol acts as a lubricant, improving the brittleness of the reconstituted tobacco leaves. The combination of glycerol and sodium carboxymethyl cellulose not only enhances the formability of the reconstituted tobacco leaves, but also, when this core material is used in cigarettes, the reconstituted tobacco leaves absorb water from the smoke, increasing their viscosity and further improving their adsorption performance and filtration effect. Furthermore, experimental studies have shown that adding glycerol to reconstituted tobacco leaves is beneficial for the release of aroma components from tobacco substances.

[0033] Preferably, the mass ratio of glycerol to sodium carboxymethyl cellulose is 1:(0.5-1.5), for example, it can be 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3 or 1:1.4, etc.

[0034] Preferably, the fiber is a plant fiber, including wood pulp fiber, straw pulp fiber, hemp pulp fiber, bamboo pulp fiber, etc.

[0035] Preferably, the plant fiber is wood pulp fiber.

[0036] Preferably, the wood pulp fiber is hardwood fiber and / or softwood fiber.

[0037] Preferably, the viscosity of the latex is 4000-7000 mPa·s, for example, it can be 4500 mPa·s, 5000 mPa·s, 5500 mPa·s, 6000 mPa·s or 6500 mPa·s, etc.

[0038] Preferably, the particle size of the foam ceramic is 50-280 mesh, for example, it can be 70 mesh, 100 mesh, 130 mesh, 150 mesh, 200 mesh, 220 mesh, 250 mesh or 270 mesh, etc.

[0039] In a second aspect, the present invention provides a method for preparing a filter rod core material for cigarettes as described in the first aspect. The preparation method includes: mixing polylactic acid, latex and foam ceramic to obtain a coating layer; mixing tobacco powder, fiber and additives to form a sheet to obtain reconstituted tobacco; using the reconstituted tobacco as a base layer, spraying a coating layer onto one side of the base layer to obtain the filter rod core material for cigarettes.

[0040] Preferably, the tobacco powder, fiber and additives are mixed and then processed using a slurry method or a roller pressing method to obtain reconstituted tobacco leaves.

[0041] Preferably, the polylactic acid, latex, and foam ceramic are mixed in a coating machine;

[0042] Preferably, the temperature of the coating machine is set to 150-200℃, for example, 155℃, 160℃, 170℃, 180℃ or 190℃.

[0043] Thirdly, the present invention provides an application of the cigarette filter rod core material as described in the first aspect in the preparation of cigarette filter rods.

[0044] Fourthly, the present invention provides a cigarette filter rod, which includes an inner core and an outer wrapping layer from the inside out;

[0045] The inner core is formed by rolling or cutting the cigarette filter rod core material as described in the first aspect and then gathering it together.

[0046] The material of the outer wrapping layer includes any one or a combination of at least two of paper, polylactic acid film, or polyhydroxyalkanoate film.

[0047] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] (1) The filter rod core material for cigarettes of the present invention is obtained by using polylactic acid and reconstituted tobacco leaves as the main materials in the coating layer. It has both good tar reduction and cooling effects, and the polylactic acid membrane does not collapse after being heated. Moreover, the reconstituted tobacco leaves contain less fiber and have no negative impact on sensory quality.

[0050] (2) The preparation method of the cigarette filter rod core material provided by the present invention is simple. The polylactic acid is loaded onto the reconstituted tobacco leaves by the coating method, which can achieve a tight bond between the polylactic acid mixture and the reconstituted tobacco leaves. The production speed is fast and the cost is low. Detailed Implementation

[0051] 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.

[0052] The source information for some of the materials involved in the following embodiments and comparative examples is as follows:

[0053] Wood pulp fiber Brazilian Goldfish Pulp Paper Company Polylactic acid Anhui Fengyuan Group Co., Ltd. emulsion Henkel Adhesives Technology (Guangdong) Co., Ltd. 132-2123 foam ceramics Zhengzhou Haixu Abrasive Co., Ltd.

[0054] All other raw materials can be used as long as they are purchased from authorized distributors.

[0055] Example 1

[0056] This embodiment provides a filter rod core material for cigarettes, which includes a base layer (0.3 mm thick) and a coating layer (0.1 mm thick).

[0057] The base layer includes reconstituted tobacco leaves;

[0058] The reconstituted tobacco leaf formula includes 85 parts tobacco powder, 5 parts fiber, and 20 parts additives;

[0059] The tobacco powder is a combination of flue-cured tobacco powder, burley tobacco powder and flavored tobacco powder in a mass ratio of 3:0.8:2.

[0060] The additive is a combination of glycerol and sodium carboxymethyl cellulose in a mass ratio of 1:1;

[0061] The coating layer comprises 95 parts polylactic acid, 2 parts latex, and 3 parts foam ceramic (150 mesh particle size);

[0062] The latex was purchased from Henkel Adhesives Technology (Guangdong) Co., Ltd., with a solid content of 55% and a viscosity of 5000 mPa.s.

[0063] The method for preparing the filter rod core material for cigarettes includes:

[0064] (1) After mixing tobacco powder, fiber and additives, reconstituted tobacco leaves are obtained by slurry method, with reconstituted tobacco leaves as the base layer;

[0065] (2) Polylactic acid, latex and foam ceramic are mixed in a coating machine at 160°C and then coated with a coating layer on one side of the base layer to obtain the filter rod core material for cigarettes.

[0066] Example 2

[0067] This embodiment provides a filter rod core material for cigarettes, which includes a base layer (0.5 mm thick) and a coating layer (0.2 mm thick).

[0068] The base layer includes reconstituted tobacco leaves;

[0069] The reconstituted tobacco leaf formula includes 70 parts tobacco powder, 10 parts fiber, and 30 parts additives;

[0070] The tobacco powder is a combination of flue-cured tobacco powder, burley tobacco powder and flavored tobacco powder in a mass ratio of 4:0.5:1.

[0071] The additive is a combination of glycerol and sodium carboxymethyl cellulose in a mass ratio of 1:0.5;

[0072] The coating layer comprises 92 parts polylactic acid, 3 parts latex, and 5 parts foam ceramic (100 mesh particle size);

[0073] The latex was purchased from Henkel Adhesives Technology (Guangdong) Co., Ltd., with a solid content of 55% and a viscosity of 5000 mPa.s.

[0074] The method for preparing the filter rod core material for cigarettes includes:

[0075] (1) After mixing tobacco powder, fiber and additives, reconstituted tobacco leaves are obtained by slurry method, with reconstituted tobacco leaves as the base layer;

[0076] (2) Polylactic acid, latex and foam ceramic are mixed in a coating machine at 180°C and then coated with a coating layer on one side of the base layer to obtain the filter rod core material for cigarettes.

[0077] Example 3

[0078] This embodiment provides a filter rod core material for cigarettes, which includes a base layer (0.2 mm thick) and a coating layer (0.05 mm thick).

[0079] The base layer includes reconstituted tobacco leaves;

[0080] The reconstituted tobacco leaf formula includes 95 parts tobacco powder, 1 part fiber, and 14 parts additives.

[0081] The tobacco powder is a combination of flue-cured tobacco powder, burley tobacco powder and flavored tobacco powder in a mass ratio of 2:1:3;

[0082] The additive is a combination of glycerol and sodium carboxymethyl cellulose in a mass ratio of 1:1.5;

[0083] The coating layer comprises 97 parts polylactic acid, 1.5 parts latex, and 1.5 parts foam ceramic (50 mesh particle size).

[0084] The latex was purchased from Henkel Adhesives Technology (Guangdong) Co., Ltd., with a solid content of 55% and a viscosity of 5000 mPa.s.

[0085] The method for preparing the filter rod core material for cigarettes includes:

[0086] (1) After mixing tobacco powder, fiber and additives, reconstituted tobacco leaves are obtained by roller pressing, with the reconstituted tobacco leaves as the base layer;

[0087] (2) Polylactic acid, latex and foam ceramic are mixed in a coating machine at 170°C and then coated with a coating layer on one side of the base layer to obtain the filter rod core material for cigarettes.

[0088] Example 4

[0089] This embodiment provides a filter rod core material for cigarettes. The only difference between the filter rod core material and that in Embodiment 1 is that the tobacco powder in the reconstituted tobacco leaf formula is a combination of flue-cured tobacco powder and burley tobacco powder in a ratio of 3:0.8, and the amount of tobacco powder remains unchanged. The other components, amounts, and parameters are the same as in Embodiment 1, and the preparation method is the same as in Embodiment 1.

[0090] Example 5

[0091] This embodiment provides a filter rod core material for cigarettes. The only difference between the filter rod core material and that in Embodiment 1 is that the tobacco powder in the reconstituted tobacco leaf formula is a combination of flue-cured tobacco powder and flavored tobacco powder in a 3:2 ratio, and the amount of tobacco powder remains unchanged. The other components, amounts, and parameters are the same as in Embodiment 1, and the preparation method is the same as in Embodiment 1.

[0092] Example 6

[0093] This embodiment provides a filter rod core material for cigarettes. The only difference between the filter rod core material and that in Embodiment 1 is that the tobacco powder in the reconstituted tobacco formula is a combination of Burley tobacco powder and flavoring tobacco powder in a ratio of 0.8:2, and the amount of tobacco powder remains unchanged. The other components, amounts and parameters are the same as in Embodiment 1, and the preparation method is the same as in Embodiment 1.

[0094] Example 7

[0095] This embodiment provides a filter rod core material for cigarettes. The only difference between the filter rod core material for cigarettes and that in Embodiment 1 is that the additive in the reconstituted tobacco formula is glycerin, and the amount of additive remains unchanged. The other components, amounts and parameters are the same as in Embodiment 1, and the preparation method is the same as in Embodiment 1.

[0096] Example 8

[0097] This embodiment provides a filter rod core material for cigarettes. The only difference between the filter rod core material for cigarettes and that in Embodiment 1 is that the additive in the reconstituted tobacco formula is sodium carboxymethyl cellulose, and the amount of additive remains unchanged. The other components, amounts and parameters are the same as in Embodiment 1, and the preparation method is the same as in Embodiment 1.

[0098] Comparative Example 1

[0099] This comparative example provides a filter rod core material for cigarettes, which includes only a base layer (0.3 mm thick);

[0100] The base layer includes reconstituted tobacco leaves;

[0101] The reconstituted tobacco leaf formula includes 85 parts tobacco powder, 5 parts fiber, and 20 parts additives;

[0102] The tobacco powder is a combination of flue-cured tobacco powder, burley tobacco powder and flavored tobacco powder in a mass ratio of 3:0.8:2.

[0103] The additive is a combination of glycerol and sodium carboxymethyl cellulose in a mass ratio of 1:1;

[0104] The preparation method of the cigarette filter rod core material includes: mixing tobacco powder, fiber and additives and then using a slurry method to obtain reconstituted tobacco leaves, which are the cigarette filter rod core material.

[0105] Comparative Example 2

[0106] This comparative example provides a filter rod core material for cigarettes, which consists only of a coating layer (0.1 mm thick);

[0107] The coating layer comprises 95 parts polylactic acid, 2 parts latex, and 3 parts foam ceramic (150 mesh particle size).

[0108] The method for preparing the filter rod core material for cigarettes includes:

[0109] Polylactic acid, latex, and foam ceramics are mixed in a coating machine at 160°C to obtain a coating layer, which is the core material of the cigarette filter rod.

[0110] Comparative Example 3

[0111] This comparative example provides a filter rod core material for cigarettes. The only difference between the filter rod core material and Example 1 is that the reconstituted tobacco formula does not include fiber. The other components, dosages and parameters are the same as in Example 1, and the preparation method is the same as in Example 1.

[0112] Comparative Example 4

[0113] This comparative example provides a filter rod core material for cigarettes. The only difference between the filter rod core material and Example 1 is that the coating layer does not include latex and foam ceramic. The remaining components, dosages and parameters are the same as in Example 1, and the preparation method is the same as in Example 1.

[0114] Test Example 1: Detection of Flue Gas Composition and Temperature

[0115] Because this invention specifies that the preparation method of reconstituted tobacco is either the slurry method or the rolling method, sodium carboxymethyl cellulose in the raw materials for preparing reconstituted tobacco acts as a binder to bind tobacco powder and fibers to form reconstituted tobacco. The role of the fibers is to provide a supporting skeleton for the forming of reconstituted tobacco. Since the additive in Example 7 is only glycerin and does not contain sodium carboxymethyl cellulose, the reconstituted tobacco in Example 7 could not be formed. In Comparative Example 3, the base layer (reconstituted tobacco) formulation did not contain fibers, resulting in poor formability of the prepared reconstituted tobacco, making it unusable. The filter rod and filter element described in Comparative Example 1 consisted only of reconstituted tobacco; the core material was prone to cracking during rolling, resulting in poor filter rod formation, and no cigarette rolling was performed. Therefore, Test Examples 1 and 2 of this invention do not contain test data for Example 7, Comparative Example 1, and Comparative Example 3.

[0116] Test method:

[0117] The cigarette filter rod core materials obtained in Examples 1-6, 8, and Comparative Examples 2 and 4 were rolled and then fed into a positioning circular guide tube. After exiting the circular guide tube, they entered a forming cigarette gun. Inside the forming cigarette gun, the core material was wrapped with filter rod forming paper to form a filter rod. The filter rod and tobacco were then machined to produce test cigarettes, wherein the filter rod length was 30 mm. Cigarettes with cellulose acetate filter rods (30 mm in length) were prepared using the same process as control cigarettes.

[0118] The tar content, carbon monoxide content, and inlet temperature of the mainstream smoke captured from the test cigarettes and control cigarettes were measured, and the draw resistance of the cigarettes was tested.

[0119] Test method:

[0120] The tar content was determined according to GB / T 19609-2004, "Total particulate matter and tar for conventional analysis of cigarettes using a smoking machine".

[0121] The CO content was determined according to GB / T 23356-2009, Determination of Carbon Monoxide in Gas Phase of Cigarette Smoke - Non-scattering Infrared Method.

[0122] The draw resistance test was performed in accordance with GB / T 22838.5-2009 Determination of Physical Properties of Cigarettes and Filters Part 5: Cigarette Draw Resistance and Filter Pressure Drop.

[0123] The smoke temperature test adopts the thermocouple temperature measurement method. The cigarette smoking model is simulated according to the national standard YC / T29-1996. The thermocouple is fixed 1 mm from the center of the cigarette filter outlet. The thermocouple is connected to the temperature data acquisition system to measure the temperature of the smoke at the cigarette filter outlet during smoking.

[0124] The results are shown in Table 1.

[0125] Table 1

[0126]

[0127] As shown in Table 1, compared with the control cigarette, the filter rods prepared from the filter rod core material of Examples 1-3 of the present invention have lower draw resistance, more suitable inlet temperature, and better adsorption effect on harmful chemical components in the smoke after being used in cigarettes.

[0128] As can be seen from Example 8, when the additive does not contain glycerin, although the filter rod can still be formed, its formability is poor, which in turn affects the adsorption effect of the filter rod.

[0129] As can be seen from Comparative Example 2, when the filter rod and filter element are only polylactic acid layers (coating layers), the filter rod not only has a significantly poor adsorption effect on harmful chemical components in flue gas, but also the flue gas inlet temperature in Comparative Example 2 is too high.

[0130] As can be seen from Comparative Example 4, the combination of foam ceramic and polylactic acid can also improve the adsorption effect of the filter rod on harmful components.

[0131] Test Example 2 Sensory Quality

[0132] Sample preparation was the same as in Test Example 1. Sensory quality tests were conducted on the test cigarettes and the control cigarettes.

[0133] Test method: Refer to national standard GB 5606.4-2005 Cigarettes Part 4: Sensory technical requirements.

[0134] Testing criteria: Aroma scores range from 1 to 30 points, harmony scores range from 1 to 10 points, off-flavor scores range from 1 to 15 points, irritation scores range from 1 to 20 points, aftertaste scores range from 1 to 25 points, and the total score is 100 points.

[0135] The results are shown in Table 2.

[0136] Table 2

[0137]

[0138]

[0139] As can be seen from Test Example 2, and as shown in Table 2, compared with the control cigarette, the filter rods prepared from the filter rod core material of the cigarette prepared in Examples 1-3 of the present invention significantly improve the aroma, off-flavors, harmony, irritation, and taste of the cigarettes.

[0140] As can be seen from Examples 4-6, the composition of the tobacco powder in the reconstituted cigarette formula affects the sensory experience, and the combination of tobacco powder selected in this invention will bring characteristic aroma to the smoke.

[0141] The applicant declares that this invention illustrates a cigarette filter rod core material, 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.

[0142] 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.

[0143] 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 filter rod core material for cigarettes, characterized in that, The filter rod core material for cigarettes includes a base layer and a coating layer; The base layer includes reconstituted tobacco leaves; The reconstituted tobacco leaf formulation comprises 70-95 parts tobacco powder, 0.5-10 parts fiber, and 5-30 parts additives by weight. The coating layer includes polylactic acid, latex, and foam ceramic; The tobacco powder is a combination of flue-cured tobacco powder, burley tobacco powder, and flavored tobacco powder; The additive is a combination of glycerol and sodium carboxymethyl cellulose.

2. The cigarette filter rod core material as described in claim 1, characterized in that, The thickness of the coating layer is 0.01-0.3 mm.

3. The cigarette filter rod core material as described in claim 1, characterized in that, The thickness of the base layer is 0.1-0.5 mm.

4. The cigarette filter rod core material as described in claim 1, characterized in that, By weight, the coating layer comprises 90-100 parts polylactic acid, 0.5-3 parts latex, and 1-5 parts foam ceramic.

5. The cigarette filter rod core material as described in claim 1, characterized in that, The mass ratio of the flue-cured tobacco powder, burley tobacco powder, and spice tobacco powder is (2-4):(0.5-1):(1-3).

6. The cigarette filter rod core material as described in claim 1, characterized in that, The mass ratio of glycerol to sodium carboxymethyl cellulose is 1:(0.5-1.5).

7. The cigarette filter rod core material as described in claim 1, characterized in that, The viscosity of the latex is 4000-7000 mPa·s.

8. The cigarette filter rod core material as described in claim 1, characterized in that, The particle size of the foam ceramic is 50-280 mesh.

9. A method for preparing a cigarette filter rod core material as described in any one of claims 1-8, characterized in that, The preparation method includes: mixing polylactic acid, latex and foam ceramic to obtain a coating layer; mixing tobacco powder, fiber and additives to form sheets to obtain reconstituted tobacco leaves; using the reconstituted tobacco leaves as a base layer, spraying a coating layer on one side of the base layer to obtain the filter rod core material for cigarettes.

10. The method for preparing the filter rod core material for cigarettes as described in claim 9, characterized in that, The polylactic acid, latex, and foam ceramics are mixed in a coating machine.

11. The method for preparing the filter rod core material for cigarettes as described in claim 10, characterized in that, The temperature of the coating machine is set to 150-200℃.

12. The method for preparing the filter rod core material for cigarettes as described in claim 9, characterized in that, The tobacco powder, fiber, and additives are mixed and then processed using a slurry method or a roller pressing method to obtain reconstituted tobacco leaves.

13. The use of a cigarette filter rod core material as described in any one of claims 1-8 in the preparation of cigarette filter rods.

14. A cigarette filter rod, characterized in that, The cigarette filter rod includes an inner core and an outer wrapping layer from the inside out; The inner core is formed by rolling or cutting the cigarette filter rod core material as described in any one of claims 1-8 and then gathering it together; The material of the outer wrapping layer includes any one or a combination of at least two of paper, polylactic acid film, or polyhydroxyalkanoate film.

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