Functional fiber slurry for cigarette paper, cigarette paper, preparation method of functional fiber slurry and application of functional fiber slurry in cigarettes

Abstract

The invention relates to functional fiber pulp for cigarette paper, the cigarette paper, a preparation method of the cigarette paper and application of the cigarette paper in cigarette preparation. The functional fiber pulp comprises hemp pulp, wood pulp and functional auxiliary fiber pulp, the functional auxiliary fiber pulp is bamboo pulp and Chinese alpine rush pulp. According to the functional fiber pulp composition, the sensory quality and safety of cigarettes can be optimized at the same time, the smoke indexes (tar content, CO content and nicotine content) of the prepared cigarettes can be reduced, the original physical strength of paper can be maintained on the basis of reducing the use amount (production cost) of hemp pulp, and the bamboo pulp and the Chinese alpine rush pulp are added to achieve synergistic interaction in the efficacy aspect. Through the specific fiber pulp combination, the problem that in a hemp pulp alternative scheme, strength keeping, combustion regulation and control and sensory guarantee cannot be balanced is successfully solved, and collaborative optimization of multiple performance targets is achieved.

Description

Technical Field

[0001] This invention belongs to the field of functional paper-based materials technology, and relates to a functionalized fiber pulp for cigarette paper, cigarette paper, its preparation method, and its application in cigarettes. Background Technology

[0002] As a crucial component of cigarettes, cigarette paper's composition and properties directly influence the combustion behavior, smoke chemical composition, and sensory quality of cigarettes. Hemp pulp (such as flax pulp), due to its long fibers, high strength, and excellent physical properties in papermaking, has long been an irreplaceable core fiber raw material for high-grade cigarette paper.

[0003] However, the application of hemp pulp faces severe challenges. 1) Resource and cost issues: Limited planting areas for hemp plants and high production costs lead to unstable and expensive raw material supply. 2) Limited technical performance: The functional controllability of cigarette paper made from pure hemp pulp or high-proportion hemp pulp is limited, making it difficult to achieve efficient selective reduction of harmful components in cigarette smoke or targeted improvement of aroma quality while maintaining sufficient physical strength.

[0004] The industry typically uses hardwood pulp or softwood pulp to partially replace hemp pulp, but such substitutions often come at the cost of reducing the release of harmful components from cigarette paper. Moreover, the effect of controlling the release of smoke is not significant or controllable, and may even generate new impurities or increase the release of harmful components due to differences in chemical composition such as lignin and extracts.

[0005] Therefore, there is an urgent need in this field to develop a fiber raw material for cigarette paper that can reduce the amount of hemp pulp used, thereby reducing production costs, and can reduce harmful components in smoke or improve aroma quality while maintaining sufficient physical strength. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a functionalized fiber pulp for cigarette paper, cigarette paper, a method for preparing the same, and its application in cigarettes.

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

[0008] In a first aspect, the present invention provides a functionalized fiber pulp for cigarette paper, the functionalized fiber pulp comprising: hemp pulp, wood pulp and functionalized auxiliary fiber pulp; wherein the functionalized auxiliary fiber pulp is bamboo pulp and grass pulp.

[0009] This invention creatively combines hemp pulp, wood pulp, bamboo pulp, and dragon's beard grass pulp to obtain a functional fiber pulp composition. This composition can simultaneously optimize the sensory quality and safety of cigarettes, and can also maintain the original physical strength of paper while reducing the amount of hemp pulp used (production cost). Furthermore, the addition of bamboo pulp and dragon's beard grass pulp synergistically enhances the above-mentioned effects.

[0010] Preferably, based on the total oven-dry weight of the functional fiber pulp, it comprises: 55-85% hemp pulp, 1-40% wood pulp, 5-20% bamboo pulp, and 3-10% bulrush pulp.

[0011] Based on the synergistic relationship between the various pulps in the composition, when the specific mass ratio relationship mentioned above is met, it has a greater advantage in improving the sensory quality and safety of the produced cigarettes and maintaining the physical strength of the cigarette paper.

[0012] The mass percentage of hemp pulp can be selected from 55%, 58%, 60%, 63%, 65%, 68%, 70%, 70%, 80%, 85%, etc.; the mass percentage of wood pulp can be selected from 5%, 7%, 10%, 13%, 15%, 20%, 25%, 30%, 35%, 40%, etc.; the mass percentage of bamboo pulp can be selected from 5%, 7%, 8%, 10%, 12%, 14%, 15%, 17%, 18%, 20%, etc.; and the mass percentage of dragon's beard grass pulp can be selected from 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0013] Preferably, the bamboo pulp has a fiber length of 1.5-2.5 mm (e.g., 1.5 mm, 1.7 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc.) and a fiber cell wall thickness of 3-7 μm (e.g., 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, etc.).

[0014] Preferably, the fiber length of the grass pulp is 1.0-1.8 mm, such as 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, etc.

[0015] Preferably, the wood pulp is softwood pulp and / or hardwood pulp.

[0016] Preferably, the hemp pulp is selected from any one or a combination of at least two of hemp fiber, jute fiber, sisal fiber or flax fiber.

[0017] Secondly, the present invention provides a cigarette paper, wherein the raw materials for preparing the cigarette paper include the functionalized fiber pulp, filler and combustion aid described in the first aspect.

[0018] Preferably, the filler comprises calcium carbonate.

[0019] Preferably, the amount of filler added is 30-35% of the oven-dry weight of the functionalized fiber pulp, such as 30%, 31%, 32%, 33%, 34%, 35%, etc.

[0020] Preferably, the combustion improver includes citrate and / or tartrate.

[0021] Preferably, the amount of the combustion aid added is 1.2-2.5% of the oven-dry weight of the functionalized fiber pulp, such as 1.2%, 1.4%, 1.5%, 1.7%, 1.8%, 2%, 2.2%, 2.3%, 2.4%, 2.5%, etc.

[0022] Thirdly, the present invention provides a method for preparing cigarette paper according to the second aspect, the method comprising: beating each pulp in the functional fiber pulp separately, mixing it with filler, forming the mixed pulp on a wire, pressing, sizing (containing a combustion aid) and drying, etc., to obtain the cigarette paper.

[0023] The "pulping treatment", "paper making", "pressing" and "drying" operations involved in this invention are all carried out using conventional or existing technical methods in the field, and are not specifically limited herein.

[0024] Preferably, the freeness of the hemp pulp, softwood pulp, bamboo pulp, and grass pulp is independently 40-85°SR (e.g., 40°SR, 45°SR, 50°SR, 55°SR, 60°SR, 65°SR, 70°SR, 75°SR, 80°SR, 85°SR, etc.); and the freeness of the hardwood pulp is 22-28°SR (e.g., 22°SR, 23°SR, 24°SR, 25°SR, 26°SR, 27°SR, 28°SR, etc.).

[0025] Fourthly, the present invention provides the use of the functionalized fiber pulp according to the first aspect or the cigarette paper according to the second aspect in the preparation of cigarettes.

[0026] Other values ​​not listed above within the range of values ​​can be selected and are all within the protection scope of this invention. Considering the brevity of the discussion, they will not be elaborated on here.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention creatively combines hemp pulp, wood pulp, bamboo pulp, and dragon's beard grass pulp to obtain a functionalized fiber pulp composition. This composition can simultaneously optimize the sensory quality and safety of cigarettes, reduce the smoke indicators (tar, CO, and nicotine) of the produced cigarettes, and maintain the original physical strength of the paper while reducing the amount of hemp pulp used (production cost). Furthermore, the addition of bamboo pulp and dragon's beard grass pulp synergistically enhances the above-mentioned effects. This invention successfully solves the problem of unbalanced "strength maintenance-combustion control-sensory assurance" in hemp pulp alternatives through a specific fiber pulp combination, achieving synergistic optimization of multiple performance objectives. Moreover, the fiber raw materials involved in this invention are readily available, the preparation process is fully compatible with existing cigarette paper production lines, requires no equipment modification, and is easy to promote and apply on a large scale. Detailed Implementation

[0029] 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.

[0030] In the following specific examples, hemp pulp (flax fiber), bamboo pulp (fiber length of 1.5-2.5 mm and fiber cell wall thickness of 3-7 μm), grass pulp (fiber length of 1.0-1.8 mm), softwood pulp, hardwood pulp, calcium carbonate filler, and potassium citrate combustion aid are all commonly used raw materials in the production of cigarette paper in this field.

[0031] In the following specific cases, the processes of papermaking, pressing, and drying on the long-wire paper machine are all conventional processes in this field, and the operating methods are consistent.

[0032] Example 1

[0033] This embodiment provides a cigarette paper, the preparation method of which is as follows:

[0034] (1) Based on the total weight of oven-dry fibers, mix 60% hemp pulp (beating degree of 80°SR), 15% softwood pulp (beating degree of 80°SR), 15% hardwood pulp (beating degree of 25°SR), 5% bamboo pulp (beating degree of 80°SR), and 5% grass pulp (beating degree of 80°SR).

[0035] (2) Papermaking: Add 30% of the weight of the oven-dried pulp of calcium carbonate filler to the pulp in step (1), and then paper it on a wire paper machine, press it, apply sizing (1.5% potassium citrate combustion aid), and dry it to obtain cigarette paper.

[0036] Example 2

[0037] This embodiment provides a cigarette paper, the preparation method of which is as follows:

[0038] (1) Based on the total weight of oven-dry fibers, mix 65% hemp pulp (beating degree of 60°SR), 20% softwood pulp (beating degree of 60°SR), 10% bamboo pulp (beating degree of 60°SR), and 5% grass pulp (beating degree of 60°SR).

[0039] (2) Papermaking: Add 35% of the dry weight of calcium carbonate filler to the pulp in step (1), then paper it on a wire paper machine, press it, apply sizing (2% potassium citrate combustion aid) to the surface, and dry it to obtain cigarette paper.

[0040] Example 3

[0041] This embodiment provides a cigarette paper, the preparation method of which is as follows:

[0042] (1) Based on the total weight of oven-dry fibers, mix 65% hemp pulp (beating degree of 60°SR), 20% hardwood pulp (beating degree of 22°SR), 8% bamboo pulp (beating degree of 60°SR), and 7% grass pulp (beating degree of 60°SR).

[0043] (2) Papermaking: Add 30% of the weight of the oven-dried pulp of calcium carbonate filler to the pulp in step (1), and then paper it on a wire paper machine, press it, apply sizing (2.5% potassium citrate combustion aid) to the surface, and dry it to obtain cigarette paper.

[0044] Example 4

[0045] This embodiment provides a cigarette paper whose preparation method differs from that of Embodiment 1 only in the mass ratio of each pulp: based on the total weight of oven-dry fibers, 60% hemp pulp (freezing degree of 80°SR), 15% softwood pulp (freezing degree of 80°SR), 15% hardwood pulp (freezing degree of 25°SR), 2% bamboo pulp (freezing degree of 80°SR), and 13% grass pulp (freezing degree of 80°SR) are mixed.

[0046] Comparative Example 1

[0047] This comparative example provides a cigarette paper whose preparation method differs from that of Example 1 only in that: the amount of dragon's beard grass pulp is omitted and the reduced amount is allocated to the mass of bamboo pulp, while other conditions remain unchanged.

[0048] Comparative Example 2

[0049] This comparative example provides a cigarette paper whose preparation method differs from that of Example 1 only in that bamboo pulp is omitted, and the reduced amount is allocated to the mass of dragon's beard grass pulp, while other conditions remain unchanged.

[0050] Comparative Example 3

[0051] This comparative example provides a cigarette paper whose preparation method differs from that of Example 1 only in that bamboo pulp and dragon's beard grass pulp are omitted, and the reduced amount is proportionally allocated to the mass of softwood pulp and hardwood pulp, while other conditions remain unchanged.

[0052] Comparative Example 4

[0053] This comparative example provides a cigarette paper, the preparation method of which is as follows:

[0054] Add 30% by weight of calcium carbonate filler and 1.5% by weight of potassium citrate combustion aid to hemp pulp (freezing degree of 80°SR). Then, paper is formed on a long-wire paper machine, pressed, and dried to obtain cigarette paper.

[0055] Application Example 1-4 and Comparative Application Example 1-4

[0056] Cigarettes were prepared using the cigarette paper obtained in Examples 1-4 and Comparative Examples 1-4 under the same process conditions. Specifically, the pre-mixed tobacco shreds were fed evenly into a cigarette rolling machine and placed on a continuous cigarette paper. Subsequently, the machine rolled the cigarette paper and tobacco shreds into a continuous cylindrical tobacco strip, glued the seams, and cut it into filterless tobacco segments. Then, these tobacco segments were precisely connected to the same cut filter rods through tipping paper (tip paper) to form a filter cigarette assembly. Finally, it was cut at high speed to form a finished cigarette with a filter, and unqualified products were removed in real time.

[0057] Test Example 1

[0058] The tensile strength and bursting strength of the cigarette papers provided in Examples 1-4 and Comparative Examples 1-4 were determined according to GB / T 12914-2018, GB / T 454-2020 and GB / T 455-2002, respectively. The results are shown in Table 1.

[0059] Table 1

[0060]

[0061] As can be seen from the data results in Table 1, comparing Example 1 and Comparative Example 4, the functional fiber pulp involved in this invention can still maintain good physical strength when other pulps are used to replace hemp pulp, and the physical strength is basically unaffected. Comparing Comparative Example 3 and Comparative Example 4, it can be seen that if only hardwood pulp or softwood pulp is used to partially replace hemp pulp, the physical strength of cigarette paper will be sacrificed.

[0062] Test Example 2

[0063] Cigarette smoke performance test:

[0064] Cigarettes prepared using Application Examples 1-4 and Comparative Application Examples 1-4 were tested for their smoke parameters (including tar content, nicotine content, and CO content) in accordance with GB / T 19609-2023 and GB / T 23355-2022. The results are shown in Table 2.

[0065] Table 2

[0066]

[0067] As shown in Table 2, compared with comparative application examples 1-4, cigarettes made using the cigarette paper involved in this invention can significantly reduce the release of tar, nicotine and CO, optimize the safety of cigarettes, and the addition of bamboo pulp and dragon beard grass pulp has a synergistic effect on the above-mentioned effects.

[0068] Test Example 3

[0069] Sensory evaluation of cigarettes:

[0070] The specific evaluation method is as follows: the cigarettes of Comparative Application Example 4 are used as control samples, and the cigarettes of Application Examples 1-4 and Comparative Application Examples 1-3 are used as test samples; seven smoking experts conduct sensory evaluation of the cigarettes according to the standard of "GB 5606.4-2005 Cigarettes Part 4: Sensory Technical Requirements", and the results are taken as average values. The sensory evaluation results are shown in Table 3.

[0071] Table 3

[0072]

[0073] As shown in Table 3, the test samples of Application Examples 1-4 involved in this invention, compared with the cigarette paper made from hemp pulp or the cigarette paper of Comparative Application Examples 1-3, all have varying degrees of effect in optimizing the sensory quality of cigarettes. This indicates that the cigarette paper made by adding bamboo pulp and dragon's beard grass pulp at the same time significantly improves the aroma richness of cigarettes and optimizes the sensory quality of cigarettes. Moreover, the addition of bamboo pulp and dragon's beard grass pulp has a synergistic effect on the above-mentioned effects.

[0074] The applicant declares that the technical solution of this invention is illustrated by the above embodiments, but this invention is not limited to the above embodiments, that is, it does not mean that this invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the products of this invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

[0075] 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.

[0076] 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 functionalized fiber pulp for cigarette paper, characterized in that, The functional fiber pulp includes: hemp pulp, wood pulp and functional auxiliary fiber pulp; the functional auxiliary fiber pulp is bamboo pulp and grass pulp.

2. The functionalized fiber pulp for cigarette paper according to claim 1, characterized in that, Based on the total oven-dry weight of the functional fiber pulp, it comprises: 55-85% hemp pulp, 1-40% wood pulp, 5-20% bamboo pulp, and 3-10% bulrush pulp.

3. The functionalized fiber pulp for cigarette paper according to claim 1 or 2, characterized in that, The bamboo pulp has a fiber length of 1.5-2.5 mm and a fiber cell wall thickness of 3-7 μm.

4. The functionalized fiber pulp for cigarette paper according to any one of claims 1-3, characterized in that, The fiber length of the grass pulp is 1.0-1.8 mm.

5. The functionalized fiber pulp for cigarette paper according to any one of claims 1-4, characterized in that, The wood pulp is softwood pulp and / or hardwood pulp; Preferably, the hemp pulp is selected from any one or a combination of at least two of hemp fiber, jute fiber, sisal fiber or flax fiber.

6. A type of cigarette paper, characterized in that, The raw materials for preparing the cigarette paper include the functionalized fiber pulp, filler, and combustion aid as described in any one of claims 1-5.

7. The cigarette paper according to claim 6, characterized in that, The filler includes calcium carbonate; Preferably, the amount of filler added is 30-35% of the oven-dry weight of the functionalized fiber pulp; Preferably, the combustion improver comprises citrate and / or tartrate; Preferably, the amount of the combustion aid added is 1.2-2.5% of the oven-dry weight of the functionalized fiber pulp.

8. The method for preparing cigarette paper according to claim 6 or 7, characterized in that, The preparation method includes: separately beating each pulp in the functional fiber pulp, then mixing it with filler, and then making the mixed pulp into paper, pressing, surface sizing and drying to obtain the cigarette paper.

9. The method for preparing cigarette paper according to claim 8, characterized in that, The beating degree of the hemp pulp, softwood pulp, bamboo pulp, and dragon's beard grass pulp is independently 40-85°SR; the beating degree of the hardwood pulp is 22-28°SR.

10. The use of the functionalized fiber pulp according to any one of claims 1-5 or the cigarette paper according to any one of claims 6-7 in the preparation of cigarettes.

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