Tobacco-based groove composite filter stick and preparation method thereof

Abstract

The invention discloses a tobacco-based groove composite filter stick which comprises a filter element and forming paper, the filter element is composed of a tobacco-based groove filter stick section and an acetate fiber filter stick section, and the tobacco-based groove filter stick section comprises acetate fiber tows and the tobacco-based groove forming paper which are wrapped inside and outside. The tobacco-based groove forming paper is prepared by rolling tobacco-based body paper to form a plurality of grooves on the paper surface, adding a wet strength agent into mixed pulp formed by tobacco fiber pulp and paper pulp, and performing a wet papermaking technology. The invention further discloses a preparation method of the tobacco-based groove composite filter stick. The tobacco-based groove composite filter stick has the advantages that the tobacco-based groove composite filter stick is formed by compositing the tobacco-based groove filter stick section and the cellulose acetate fiber filter stick section, more aerosol in mainstream smoke of cigarettes can be adsorbed, and the tar reduction and harm reduction effects are remarkable; in the cigarette smoking process, the original tobacco fragrance in the tobacco-based groove forming paper is released at the same time, and the richness and harmony of the smoke fragrance are effectively enhanced; and the physical index stability is high.

Description

Technical Field

[0001] This invention relates to the technical field of cigarette filter rod preparation methods, and in particular to a tobacco-based grooved composite filter rod and its preparation method. Background Technology

[0002] Grooved filter rods are made primarily from cellulose acetate tow, specialized grooved paper, and filter rod forming paper. The grooved paper between the tow and the forming paper forms a regularly grooved pattern. Due to its unique grooved paper structure, grooved filter rods create additional airflow channels or turbulence zones along the circumference of the filter rod, altering the smoke flow path and promoting mixing between the smoke and the filter material, resulting in higher adsorption and retention of smoke. Traditional grooved forming paper is typically made from bleached wood pulp, which, while reducing tar and harmful substances, can leave a "paper taste" in the smoke and diminish the aroma of cigarettes, severely impacting their sensory quality.

[0003] Similar to the tar reduction and harm reduction effects of grooved filter rods, paper filter rods also suffer from the aforementioned problems such as "paper taste" and reduced aroma. To address these issues, Chinese patent application CN103829374A proposes a tobacco fiber paper filter rod and its preparation method. This paper filter rod, made from tobacco raw materials and long fiber raw materials, increases the richness of cigarette aroma and reduces tar and harm. However, the physical properties of this paper filter rod fluctuate significantly, making it difficult to guarantee the consistency of the finished cigarette quality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tobacco-based grooved composite filter rod and its preparation method. This invention can ensure that the physical indicators of the filter rod fluctuate less and the filtration effect is high. In addition, the tobacco aroma can be released during the smoking process, which enhances the richness and harmony of the smoke aroma and provides technical support for improving the usability of grooved filter rods.

[0005] This invention is achieved through the following technical solution: A tobacco-based grooved composite filter rod includes a filter core and a forming paper wrapped around the filter core. The filter core consists of two sections: a tobacco-based grooved filter rod section and a cellulose acetate filter rod section. The tobacco-based grooved filter rod section includes cellulose acetate bundles wrapped inside and outside and tobacco-based grooved forming paper. The tobacco-based grooved forming paper is made by rolling tobacco-based base paper to form multiple grooves on the paper surface. The tobacco-based base paper is made by adding a wet strength agent to a mixed pulp formed from tobacco fiber pulp and paper pulp, and then using wet papermaking technology.

[0006] As a preferred embodiment of the above-mentioned tobacco-based grooved composite filter rod, in the mixed pulp, the dry weight ratio of tobacco fiber pulp to paper pulp is 1:1, and the dry weight ratio of the mixed pulp to the wet strength agent is 1:0.005.

[0007] As a preferred embodiment of the above-mentioned tobacco-based grooved composite filter rod, the basis weight of the tobacco-based base paper is 60~90g / m².

[0008] As a preferred embodiment of the above-mentioned tobacco-based grooved composite filter rod, the length ratio of the tobacco-based grooved filter rod segment to the cellulose acetate filter rod segment is (1~2):1.

[0009] This invention also provides a method for preparing a tobacco-based grooved composite filter rod, wherein the tobacco-based grooved composite filter rod is the aforementioned tobacco-based grooved composite filter rod, and the preparation method is carried out according to the following steps: Step S1: Prepare tobacco-based grooved paper Step S11: The tobacco raw material is subjected to a pretreatment process and an extraction process in sequence, and then the tobacco pulp is obtained by solid-liquid separation. After grinding, it is made into tobacco fiber pulp. Step S12: Mix tobacco fiber pulp and paper pulp at a dry weight ratio of 1:1 to form a mixed pulp. Add wet strength agent according to the dry weight of the mixed pulp and the mass ratio of wet strength agent of 1:0.005. Then, use wet papermaking technology to homogenize, form wire, press and dry to produce tobacco-based base paper with a basis weight of 60~90g / m². Step S13: After the tobacco-based base paper is cut, it is rolled using the flexible embossing device in the filter rod forming machine to form multiple longitudinally extending grooves on the surface of the cut tobacco-based base paper, thus forming tobacco-based grooved forming paper. Step S2: Preparation of tobacco-based grooved filter rods Tobacco-based grooved filter rods are obtained by wrapping cellulose acetate bundles with tobacco-based grooved forming paper and then cutting them. Step S3: Prepare cellulose acetate filter rods After wrapping the cellulose acetate bundles with molding paper, they are cut to obtain cellulose acetate filter rods; Step S4: Cut the tobacco-based grooved filter rod and the cellulose acetate filter rod to obtain tobacco-based grooved filter rod segments and cellulose acetate filter rod segments respectively; arrange the tobacco-based grooved filter rod segments and cellulose acetate filter rod segments alternately in the longitudinal direction, wrap them with forming paper, and then cut them to obtain the tobacco-based grooved composite filter rod.

[0010] As a preferred embodiment of the preparation method of the above-mentioned tobacco-based grooved composite filter rod, the tobacco raw material is at least one of tobacco leaf fragments, tobacco dust, tobacco stems and stem sticks.

[0011] The present invention has the following advantages over the prior art: This invention provides a tobacco-based grooved composite filter rod and its preparation method, which is composed of tobacco-based grooved filter rod segments and cellulose acetate filter rod segments. The forming paper for the tobacco-based grooved filter rod segments is formed by rolling tobacco-based base paper into a grooved forming paper. Compared to traditional cellulose acetate filter rods, the tobacco-based grooved composite filter rod can adsorb more aerosols in the mainstream cigarette smoke, resulting in significant tar reduction and harm reduction. More importantly, during cigarette smoking, the natural aroma of tobacco in the grooved forming paper is simultaneously released, effectively enhancing the richness and harmony of the smoke's flavor and reducing woody off-flavors and irritation. Furthermore, compared to paper filter rods, the tobacco-based grooved composite filter rod exhibits relatively higher stability in its physical properties, greatly improving its application effect in cigarette products. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the tobacco-based grooved filter rod in this embodiment.

[0013] Figure 2 This is a schematic diagram of the structure of the cellulose acetate filter rod in this embodiment.

[0014] Figure 3 This is a schematic diagram of the structure of the tobacco-based grooved composite filter rod in this embodiment.

[0015] The numbers in the diagram are: 1. Tobacco-based grooved filter rod, 2. Tobacco-based grooved filter rod segment, 3. Fiber acetate filter rod, 4. Fiber acetate filter rod segment, 5. Groove, 6. Tobacco-based grooved composite filter rod. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0017] See Figures 1 to 3 This embodiment discloses a tobacco-based grooved composite filter rod, including a filter core and a forming paper wrapped around the filter core. The filter core consists of two sections: a tobacco-based grooved filter rod section 2 and a cellulose acetate filter rod section 4. The tobacco-based grooved filter rod section 2 includes cellulose acetate bundles wrapped inside and outside and tobacco-based grooved forming paper. The tobacco-based grooved forming paper is made by rolling tobacco-based base paper to form multiple grooves 5 on the paper surface. The tobacco-based base paper is made by adding a wet strength agent to a mixed pulp formed from tobacco fiber pulp and paper pulp, and then using wet papermaking technology.

[0018] This embodiment also discloses a method for preparing the above-mentioned tobacco-based grooved composite filter rod 6, which is carried out according to the following steps: Step S1: Prepare tobacco-based grooved paper Step S11: The tobacco raw material is subjected to a pretreatment process and an extraction process in sequence, and then the tobacco pulp is obtained by solid-liquid separation. After grinding, it is made into tobacco fiber pulp. The tobacco raw material is at least one of tobacco leaf fragments, tobacco dust, tobacco stems and stem sticks. Step S12: Mix tobacco fiber pulp and paper pulp at a dry weight ratio of 1:1 to form a mixed pulp. Add wet strength agent according to the dry weight of the mixed pulp and the mass ratio of wet strength agent of 1:0.005. Then, use wet papermaking technology to homogenize, form wire, press and dry to produce tobacco-based base paper with a basis weight of 60~90g / m². Step S13: After the tobacco-based base paper is slit, it is rolled using the flexible embossing device in the filter rod forming machine to form multiple longitudinally extending grooves 5 on the surface of the slit tobacco-based base paper, forming tobacco-based grooved forming paper; wherein, the cross-sectional shape of the grooves 5 is not limited. Step S2: Preparation of tobacco-based grooved filter rod 1 Tobacco-based grooved filter rod 1 is obtained by wrapping cellulose acetate bundles with tobacco-based grooved forming paper and then cutting them. Step S3: Preparation of cellulose acetate filter rod 3 After wrapping the cellulose acetate bundles with molding paper, they were cut to obtain cellulose acetate filter rods 3; Step S4: Cut the tobacco-based grooved filter rod 1 and the cellulose acetate filter rod 3 to obtain tobacco-based grooved filter rod segment 2 and cellulose acetate filter rod segment 4 respectively; arrange the tobacco-based grooved filter rod segment 2 and cellulose acetate filter rod segment 4 alternately in the longitudinal direction, wrap them with forming paper, and then cut them to obtain the tobacco-based grooved composite filter rod 6.

[0019] The tobacco-based grooved composite filter rod 6 prepared in this embodiment is composed of a tobacco-based grooved filter rod segment 2 and a cellulose acetate filter rod segment 4. The tobacco-based grooved forming paper wrapped around the tobacco-based grooved filter rod segment 2 is mainly made of tobacco raw materials. The two ends of the tobacco-based grooved composite filter rod 6 are the near-lip end and the tobacco end, respectively. To better release the tobacco aroma in the tobacco-based grooved filter rod segment 2, the tobacco-based grooved filter rod segment 2 should be located at the tobacco end. When making the cigarette, the two ends of the tobacco-based grooved filter rod segment 2 are connected to the cigarette and the conventional cellulose acetate filter rod segment 4, respectively. Since the smoke temperature is relatively high when the smoke enters the filter segment from the tobacco end, it can promote the release of the tobacco aroma in the tobacco-based grooved forming paper. In order to further reduce tar and harm and enrich the aroma of the smoke, the length ratio of the tobacco-based grooved filter rod segment 2 to the cellulose acetate filter rod segment 4 is designed to be (1~2):1.

[0020] To verify the performance of the tobacco-based grooved composite filter rod 6 prepared by the above method, the applicant selected tobacco stems from Yunnan as the tobacco raw material to prepare tobacco-based base paper, and prepared the tobacco-based grooved composite filter rod 6 according to the above preparation method. The preparation process is as follows: Tobacco stems from Yunnan Province are selected as the raw material. After pretreatment and extraction, tobacco pulp is obtained through solid-liquid separation, followed by refining to produce tobacco fiber pulp. Simultaneously, sisal pulp is selected as the paper pulp. The tobacco fiber pulp and paper pulp are mixed at a dry weight ratio of 1:1 to form a blended pulp. A wet strength agent is added at a dry weight to wet strength agent ratio of 1:0.005. Then, using wet papermaking technology, the pulp is homogenized, wire-formed, pressed, and dried to produce tobacco-based base paper with a basis weight of 80 g / m². The tobacco-based base paper is then slit according to the cigarette circumference; taking a coarse cigarette (circumference 24.20 mm) as an example, a slitting device is used to slit the 60 cm wide tobacco-based base paper into 22.5 mm wide tobacco-based base paper for later use.

[0021] The slit tobacco-based base paper is rolled using a flexible embossing device in a filter rod forming machine, forming multiple longitudinally extending grooves 5 on the surface of the slit tobacco-based base paper to form a tobacco-based grooved forming paper. The cross-sectional shape of the grooves 5 is arc-shaped, with a groove width of 0.56 mm, a groove spacing of 0.75 mm, and a groove depth of 0.73 mm. The rolled tobacco-based grooved forming paper is then used to wrap acetate fiber bundles and cut to obtain a tobacco-based grooved filter rod 1. The tobacco-based grooved filter rod 1 has a length of 120 mm and a circumference of 23.89 mm.

[0022] Based on the specifications of the tobacco-based grooved filter rod 1, a conventional cellulose acetate filter rod 3 with a length of 120 mm and a circumference of 23.90 mm is produced. On a filter rod laminating machine, the tobacco-based grooved filter rod 1 is cut into 30 mm long tobacco-based grooved filter rod segments 2, and the conventional cellulose acetate filter rod 3 is cut into 20 mm long cellulose acetate filter rod segments 4. Then, the tobacco-based grooved filter rod segments 2 and cellulose acetate filter rod segments 4 are alternately combined longitudinally, wrapped with high-permeability forming paper, and after slitting, a tobacco-based grooved composite filter rod 6 with a length of 100 mm and a circumference of 24.00 mm is obtained. Figures 1 to 3 The vertical dashed line in the middle represents the tangent line. The specific physical parameters of the prepared tobacco-based grooved composite filter rod 6 are detailed in Table 1. According to Table 1, the parameters show good compliance, with the standard deviation of draw resistance controlled within 150 Pa and minimal fluctuation. Sensory evaluation indicates that cigarettes using the tobacco-based grooved composite filter rod 6 have a richer, more robust tobacco aroma.

[0023] Table 1 Physical properties of tobacco-based grooved composite filter rods project unit average value Standard deviation weight g 0.761 0.005 length mm 100.06 0.086 Roundness mm 0.24 0.030 circumference mm 24.05 0.051 Suction Pa 2685 145 hardness % 91.95 0.898

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tobacco-based grooved composite filter rod, comprising a filter element and a forming paper wrapped around the filter element, characterized in that: The filter element consists of two sections: a tobacco-based grooved filter rod section and a cellulose acetate filter rod section. The tobacco-based grooved filter rod section includes cellulose acetate bundles wrapped inside and outside and tobacco-based grooved forming paper. The tobacco-based grooved forming paper is made by rolling tobacco-based base paper to form multiple grooves on the paper surface. The tobacco-based base paper is made by adding a wet strength agent to a mixed pulp formed from tobacco fiber pulp and paper pulp, and then using wet papermaking technology.

2. The tobacco-based grooved composite filter rod as described in claim 1, characterized in that: In the mixed pulp, the dry weight ratio of tobacco fiber pulp to paper pulp is 1:1, and the dry weight ratio of the mixed pulp to the wet strength agent is 1:0.

005.

3. The tobacco-based grooved composite filter rod as described in claim 1, characterized in that: The basis weight of the tobacco-based base paper is 60~90g / m².

4. The tobacco-based grooved composite filter rod as described in claim 1, characterized in that: The length ratio of the tobacco-based grooved filter rod segment to the cellulose acetate filter rod segment is (1~2):

1.

5. A method for preparing a tobacco-based grooved composite filter rod, characterized in that: The tobacco-based grooved composite filter rod is the tobacco-based grooved composite filter rod according to any one of claims 1 to 4, and the preparation method is carried out according to the following steps: Step S1: Prepare tobacco-based grooved paper Step S11: The tobacco raw material is subjected to a pretreatment process and an extraction process in sequence, and then the tobacco pulp is obtained by solid-liquid separation. After grinding, it is made into tobacco fiber pulp. Step S12: Mix tobacco fiber pulp and paper pulp at a dry weight ratio of 1:1 to form a mixed pulp. Add wet strength agent according to the dry weight of the mixed pulp and the mass ratio of wet strength agent of 1:0.

005. Then, use wet papermaking technology to homogenize, form wire, press and dry to produce tobacco-based base paper with a basis weight of 60~90g / m². Step S13: After the tobacco-based base paper is cut, it is rolled using the flexible embossing device in the filter rod forming machine to form multiple longitudinally extending grooves on the surface of the cut tobacco-based base paper, thus forming tobacco-based grooved forming paper. Step S2: Preparation of tobacco-based grooved filter rods Tobacco-based grooved filter rods are obtained by wrapping cellulose acetate bundles with tobacco-based grooved forming paper and then cutting them. Step S3: Prepare cellulose acetate filter rods After wrapping the cellulose acetate bundles with molding paper, they are cut to obtain cellulose acetate filter rods; Step S4: Cut the tobacco-based grooved filter rod and the cellulose acetate filter rod to obtain tobacco-based grooved filter rod segments and cellulose acetate filter rod segments respectively; arrange the tobacco-based grooved filter rod segments and cellulose acetate filter rod segments alternately in the longitudinal direction, wrap them with forming paper, and then cut them to obtain the tobacco-based grooved composite filter rod.

6. The method for preparing a tobacco-based grooved composite filter rod as described in claim 5, characterized in that: The tobacco raw material is at least one of tobacco leaf fragments, tobacco dust, tobacco stems, and tobacco stalks.

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