A method for preparing a hollow cooling tobacco-flavored paper tube for a heated cigarette

Abstract

The application discloses a preparation method of hollow cooling tobacco native-flavor paper tube for heating cigarettes. The paper of the tobacco paper tube is prepared by mixing and beating tobacco raw materials and wood pulp, adding functional additives, wet strength agent and fillers in sequence, and continuously beating to obtain composite pulp; the composite pulp is formed, dried and cut to obtain the paper of the tobacco paper tube, and the paper of the tobacco paper tube is spirally formed and rolled to form the tobacco paper tube. After the tobacco hollow paper tube prepared by the application is rolled into a heating cigarette, the tobacco paper tube can be heated by aerosol heat in the process of smoking and release tobacco aroma, so that the tobacco aroma is compensated, the sensory quality of the heating cigarette is improved, the hardness of the obtained paper tube meets the requirement of the machine, the preparation process is simple, and the cost is low.

Description

Technical Field

[0001] This invention relates to a method for preparing cigarette paper tubes, specifically a method for preparing hollow cooling tobacco-flavored paper tubes for heated cigarettes, belonging to the field of cigarette manufacturing technology. Background Technology

[0002] Heated cigarettes are structurally divided into three sections: the cigarette section, the cooling section, and the filter section. Currently, domestic and international patents primarily protect the cooling section, which is also the core technology of heated cigarettes. Most international heated cigarette products currently use the lower-cost laser perforation method for cooling. For example, Philip Morris International's electromagnetic heating TEREA product uses perforation technology to replace polylactic acid sheets as the cooling element; British American Tobacco's glo product uses perforation technology to reduce aerosol temperature. Domestic companies such as Hunan Tobacco Industry Co., Ltd. (hereinafter referred to as Hunan Tobacco) and Zhejiang Tobacco also use perforation technology to reduce aerosol temperature. This allows the cooling section to evolve from a simple cooling function to a more comprehensive application in flavor enhancement, achieving taste differentiation and thus capturing the international market. Currently, most techniques involve spraying or coating tobacco extracts onto the cooling paper tube to enhance aroma, making the heated cigarette's aroma richer. For example, patent application number CN201920732045.6 discloses a heated non-combustible cigarette with a flavoring function, which uses a flavoring gel strip or a gel or fiber strip impregnated with fragrance as a cooling section to increase the aroma of the heated cigarette. For example, patent application number CN202210442402.1 heats and sprays fragrance onto the outer wall of a thin strip to obtain a cooling strip, which not only cools the smoke but also adds fragrance.

[0003] However, existing hollow cooling and scented paper tubes mainly rely on the addition of tobacco extracts, and their preparation methods have the following problems:

[0004] (1) Tobacco extract is added by coating during the preparation of the base paper, but the drying temperature of the base paper is mostly around 110 degrees Celsius, which results in a large loss of the aroma of the tobacco extract.

[0005] (2) Tobacco extract is added to the inner wall of the paper tube by spraying. During the spraying process, a large amount of tobacco extract is wasted, and the aroma is uneven, making it difficult to guarantee the quality of the process.

[0006] (3) From a cost perspective, the preparation process of tobacco extract is relatively complex and involves significant losses, which increases costs.

[0007] In addition, compared to wood pulp fiber, tobacco raw material fiber is shorter, and the hardness of the tobacco paper tube after spiral forming cannot meet the process requirements.

[0008] Therefore, there is an urgent need to develop a method for preparing hollow cooling tobacco aroma paper tubes for heated cigarettes that minimizes the loss of tobacco extract aroma, ensures uniform aroma and high hardness, and is also inexpensive. Summary of the Invention

[0009] To address the shortcomings of existing technologies, the present invention aims to provide a method for preparing a hollow cooling tobacco aroma paper tube for heated cigarettes. The heated cigarette cooling paper tube prepared by this method has a rich and uniform tobacco aroma, and the process is simple and inexpensive.

[0010] To achieve the above-mentioned technical objectives, the present invention provides a method for preparing hollow cooling tobacco paper tubes for heated cigarettes. The method involves mixing tobacco material with wood pulp to obtain pulp material, then adding functional additives, wet strength agents and fillers to continue pulping to obtain composite pulp material. The composite pulp material is then formed, dried and slit to obtain tobacco paper tubes. The tobacco paper tubes are then spirally rolled into tobacco paper tubes.

[0011] As a preferred embodiment, the mass ratio of tobacco to wood pulp does not exceed 2:1. Controlling the amount of tobacco within a suitable range is beneficial for obtaining high-performance paper tubes; excessive amounts will affect the stiffness of the paper tubes. Furthermore, different style characteristics can be achieved by adjusting the formulation of the tobacco raw materials in the paper tubes, such as by adding flue-cured tobacco, cigar tobacco, burley tobacco, or aromatic tobacco.

[0012] As a preferred embodiment, the tobacco material includes tobacco stems, shredded tobacco, and tobacco dust.

[0013] As a preferred embodiment, the mass ratio of the tobacco stems, shredded tobacco, and tobacco dust is 2:1:1 to 4:1:1.

[0014] As a preferred embodiment, the wood pulp includes softwood pulp and hardwood pulp.

[0015] As a preferred embodiment, the mass ratio of softwood pulp to hardwood pulp is 4:6 to 5:5.

[0016] As a preferred embodiment, during the preparation of the pulp, the SR is controlled at 33°SR to 50°SR, and the wet weight is 3 to 5g.

[0017] As a preferred embodiment, the functional additives include calcium carbonate and / or cationic starch.

[0018] The wet strength agent is polyamide epichlorohydrin resin.

[0019] The filler includes at least one of titanium dioxide, kaolin, and talc.

[0020] The amount of the functional additive added is 2-6 wt% of the pulp.

[0021] The wet strength agent is added at a rate of 1-2 wt% of the pulp.

[0022] The amount of filler added is 10-15 wt% of the pulp.

[0023] As a preferred embodiment, during the preparation of the composite slurry, the beating degree is controlled to be 33°SR~50°SR, and the wet weight is 3~5g.

[0024] As a preferred embodiment, the drying process is as follows: two sets of drying cylinders are used for drying, wherein the pressure of the rollers inside the drying cylinder of the first set of drying cylinders is 80-100 kg / cm and the temperature of the drying cylinder is 110-130℃; the pressure of the rollers inside the drying cylinder of the second set of drying cylinders is 40-60 kg / cm and the temperature of the drying cylinder is 80-100℃.

[0025] As a preferred embodiment, the tobacco paper tube comprises an inner layer of tobacco paper tube paper and an outer layer of tobacco paper tube paper.

[0026] As a preferred embodiment, the basis weight of the inner tobacco paper tube is greater than that of the outer tobacco paper tube. The inner tobacco paper tube has a higher basis weight, serving a supporting function; the outer tobacco paper tube has a lower basis weight.

[0027] As a preferred embodiment, the basis weight of the inner tobacco paper tube is 100–200 g / m². 2 The thickness is 0.2 to 0.3 mm.

[0028] As a preferred embodiment, the basis weight of the outer tobacco paper tube is 40–100 g / m². 2 The thickness is 0.1 to 0.2 mm.

[0029] As a preferred embodiment, the inner and outer layers of tobacco paper tubes are bonded and rolled together in a spiral forming manner to form the tobacco paper tube.

[0030] As a preferred embodiment, the thickness of the tobacco paper tube is 0.3–0.5 mm. The circumference and length of the tobacco paper tube can be further cut according to product requirements.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) Tobacco material is used as the raw material for the hollow cooling section in the paper tube, and the temperature of the cooling section is used to heat the tobacco material to compensate for the aroma of heated cigarette tobacco, enhance the natural aroma of tobacco, and make the aroma uniform and the paper tube has high hardness.

[0033] (2) The process is simple, the raw materials are readily available, and tobacco waste can be used as raw materials, resulting in low cost. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Tobacco stems, shredded tobacco, tobacco dust, softwood pulp, and hardwood pulp were mixed and pulped in a mass ratio of 2:1:1:1:1, with a freeness of 33°SR. Then, 2% wet strength agent (polyamide epichlorohydrin resin) and 10% filler (titanium dioxide) were added sequentially to obtain a composite pulp with a wet weight of 4g. This composite pulp was formed using a two-wire machine and then dried in two sets of drying cylinders. In the first set of drying cylinders, the pressure of the rollers was 100kg / cm and the cylinder temperature was 130℃. In the second set of drying cylinders, the pressure of the rollers was 40kg / cm and the cylinder temperature was 100℃. After drying, tobacco paper tubes were obtained, which were then slit to produce paper with a basis weight of 150g / m³. 2 90g / m 2 The inner and outer layers of tobacco paper tube are spirally rolled into a tobacco paper tube. The inner layer of paper tube is 0.2 mm thick, and the outer layer of paper tube is 0.15 mm thick. According to the product parameter requirements, it is rolled into a heated cigarette product with a circumference of 21 mm, of which the length of the tobacco paper tube is 28 mm. After rolling, the appearance quality is evaluated and the sensory quality is assessed.

[0037] Example 2

[0038] Tobacco stems, shredded tobacco, tobacco dust, softwood pulp, and hardwood pulp were mixed and pulped in a mass ratio of 2:1:1:1:1, achieving a freeness of 43°SR. Then, 3% (by weight of pulp) of functional additive (cationic starch), 1% (by weight of pulp) of wet strength agent (polyamide epichlorohydrin resin), and 15% (by weight of pulp) of filler (kaolin) were added sequentially to obtain a composite pulp with a wet weight of 4g. This composite pulp was then formed using a two-stage papermaking machine and dried in two sets of drying cylinders. In the first set of drying cylinders, the pressure of the rollers was 80kg / cm and the cylinder temperature was 120℃. In the second set of drying cylinders, the pressure of the rollers was 50kg / cm and the cylinder temperature was 90℃. After drying, tobacco paper tubes were obtained, which were then slit to produce paper with a basis weight of 180g / m³. 2 100g / m 2The inner and outer layers of tobacco paper tube are spirally rolled into a tobacco paper tube. The inner layer of paper tube is 0.3 mm thick, and the outer layer of paper tube is 0.15 mm thick. According to the product parameter requirements, it is rolled into a heated cigarette product with a circumference of 21 mm, of which the length of the tobacco paper tube is 28 mm. After rolling, the appearance quality is evaluated and the sensory quality is assessed.

[0039] Example 3

[0040] Tobacco stems, shredded tobacco, tobacco dust, softwood pulp, and hardwood pulp were mixed and pulped in a mass ratio of 4:1:1:3:3, with a freeness of 50°SR. Then, 6% (by weight of pulp) of functional additive (calcium carbonate), 1% (by weight of pulp) of wet strength agent (polyamide epichlorohydrin resin), and 15% (by weight of pulp) of filler (kaolin) were added sequentially to obtain a composite pulp with a wet weight of 5g. This composite pulp was formed using a two-wire machine and then dried in two sets of drying cylinders. In the first set of drying cylinders, the pressure of the rollers was 80kg / cm and the cylinder temperature was 115℃. In the second set of drying cylinders, the pressure of the rollers was 60kg / cm and the cylinder temperature was 95℃. After drying, tobacco paper tubes were obtained, which were then slit to produce paper with a basis weight of 190g / m³. 2 90g / m 2 The inner and outer layers of tobacco paper tube are spirally rolled into a tobacco paper tube. The inner layer of paper tube is 0.25mm thick, and the outer layer of paper tube is 0.14mm thick. According to product parameter requirements, it is rolled into a heated cigarette product with a circumference of 21mm, of which the length of the tobacco paper tube is 28mm. After rolling, the appearance quality is evaluated and the sensory quality is assessed.

[0041] Comparative Example 1

[0042] This comparative example is a regular paper tube (without added tobacco raw materials) prepared by spraying tobacco extract. The specific preparation process is as follows:

[0043] Softwood pulp and hardwood pulp were mixed and beaten at a mass ratio of 2:1 to a freeness of 33°SR. Then, 2% wet strength agent (polyamide epichlorohydrin resin) and 10% filler (titanium dioxide) were added sequentially to obtain a composite pulp with a wet weight of 4g. This composite pulp was then formed on a two-wire machine and dried in two sets of drying cylinders. In the first set of drying cylinders, the pressure of the rollers was 100kg / cm and the cylinder temperature was 130℃. In the second set of drying cylinders, the pressure of the rollers was 40kg / cm and the cylinder temperature was 100℃. After drying, tobacco paper tubes were obtained, which were then slit to produce tubes with a basis weight of 80g / m³. 2 60g / m 2The inner and outer layers of tobacco paper tube are spirally rolled into a tobacco paper tube. The inner layer of paper tube is 0.11 mm thick, and the outer layer is 0.05 mm thick. Tobacco extract is sprayed onto the inner wall of the paper tube during the spiral forming process. According to product parameter requirements, it is rolled into a heated cigarette product with a circumference of 21 mm, of which the tobacco paper tube is 28 mm long. After rolling, the appearance quality and sensory quality are evaluated.

[0044] Comparative Example 2

[0045] This comparative example is a hollow tobacco paper tube prepared by adding tobacco raw materials but without adding functional additives and without thickening treatment. The specific preparation process is as follows:

[0046] Tobacco stems, shredded tobacco, tobacco dust, softwood pulp, and hardwood pulp were mixed and pulped in a mass ratio of 4:1:1:3:3, with a freeness of 50°SR. Then, 6% (by weight of pulp) of functional additive (cationic starch), 1% (by weight of pulp) of wet strength agent (polyamide epichlorohydrin resin), and 15% (by weight of pulp) of filler (kaolin) were added sequentially to obtain a composite pulp with a wet weight of 2g. This composite pulp was formed using a two-wire machine and then dried in two sets of drying cylinders. In the first set of drying cylinders, the pressure of the rollers was 80kg / cm and the cylinder temperature was 115℃. In the second set of drying cylinders, the pressure of the rollers was 60kg / cm and the cylinder temperature was 95℃. After drying, tobacco paper tubes were obtained, which were then slit to prepare paper with a basis weight of 80g / m³. 2 60g / m 2 The inner and outer layers of tobacco paper tube are spirally rolled into a tobacco paper tube. The inner layer of paper tube is 0.11 mm thick, and the outer layer is 0.05 mm thick. Tobacco extract is sprayed onto the inner wall of the paper tube during the spiral forming process. According to product parameter requirements, it is rolled into a heated cigarette product with a circumference of 21 mm, of which the tobacco paper tube is 28 mm long. After rolling, the appearance quality and sensory quality are evaluated.

[0047] This invention optimizes the stiffness of tobacco paper tubes to meet the requirements of production machinery. Specific results are detailed in Table 1. Comparative Example 1 is a tobacco extract hollow paper tube currently used in heated cigarette products; Comparative Example 2 is a tobacco hollow paper tube without functional additives or thickening treatment; Example 1 thickened the tobacco hollow paper tube to improve stiffness; Example 2 thickened the tobacco hollow paper tube and added the functional additive cationic starch to further improve stiffness; Example 3 thickened the tobacco hollow paper tube and added the functional additive calcium carbonate to further improve stiffness. According to the results in Table 1, increasing the paper tube thickness and adding functional additives can improve the overall stiffness of the paper tube and enhance the appearance quality of the rolled parts. From the sensory evaluation results, the tobacco paper tubes prepared using the methods of Example 2 and Example 3 have a richer tobacco aroma and better aroma uniformity.

[0048] Table 1. Results of stiffness, winding quality, and sensory evaluation of hollow tobacco paper tubes and ordinary paper tubes.

[0049]

[0050] To further illustrate the advantages of this invention, the tobacco paper tube prepared in Example 3 and the heated cigarette made from the paper tube of Comparative Example 1 were smoked using a smoking machine. The particulate matter collected puff by puff was analyzed by headspace gas chromatography-mass spectrometry, and the peak areas and relative standard deviations of 34 representative aroma components were compared. See Tables 2 and 3 for details.

[0051] As can be seen from the data in Tables 2 and 3, the total aroma of the tobacco paper tube prepared by the present invention is significantly higher than that of the paper tube of Comparative Example 1, while the relative standard deviation is significantly lower than that of the paper tube of Comparative Example 1. This indicates that the tobacco paper tube prepared by the present invention releases aroma components at a higher level and the aroma release is more uniform.

[0052] Table 2. Aroma component release analysis of tobacco paper tubes prepared in Example 3 of the present invention.

[0053]

[0054]

[0055] Table 3. Aroma component release analysis of tobacco paper tubes prepared in Comparative Example 1.

[0056]

[0057]

[0058] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a hollow, cooled tobacco flavoring paper tube for heating cigarettes, characterized in that: Tobacco materials are mixed with wood pulp to obtain paper pulp. Functional additives, wet strength agents and fillers are then added and pulping is continued to obtain composite pulp. The composite pulp is then formed, dried and slit to obtain tobacco paper tubes. The tobacco paper tubes are then spirally formed and rolled into tobacco paper tubes. The mass ratio of tobacco material to wood pulp shall not exceed 2:1; The functional additives include calcium carbonate and / or cationic starch; The wet strength agent is polyamide epichlorohydrin resin; The filler includes at least one of titanium dioxide, kaolin, and talc. The amount of the functional additive added is 2-6 wt% of the pulp. The wet strength agent is added at a rate of 1-2 wt% of the pulp. The amount of filler added is 10-15 wt% of the pulp. The tobacco paper tube comprises an inner layer of tobacco paper tube and an outer layer of tobacco paper tube, wherein the basis weight of the inner layer of tobacco paper tube is 100~200 g / m³. 2 The thickness is 0.2~0.3mm; the basis weight of the outer tobacco paper tube is 40~100g / m³. 2 The thickness is 0.1~0.2mm, and the basis weight of the inner tobacco paper tube is greater than that of the outer tobacco paper tube.

2. The method for preparing a hollow cooling tobacco flavor paper tube for heated cigarettes according to claim 1, characterized in that: The tobacco material includes tobacco stems, shredded tobacco, and tobacco dust; the mass ratio of the tobacco stems, shredded tobacco, and tobacco dust is 2:1:1 to 4:1:

1.

3. The method for preparing a hollow cooling tobacco flavor paper tube for heated cigarettes according to claim 1, characterized in that: The wood pulp includes softwood pulp and hardwood pulp; the mass ratio of the softwood pulp to the hardwood pulp is 4:6 to 5:

5.

4. The method for preparing a hollow cooling tobacco flavor paper tube for heated cigarettes according to claim 1, characterized in that: During the preparation of the pulp, the beating degree is controlled at 33°SR~50°SR and the wet weight is 3~5g.

5. The method for preparing a hollow cooling tobacco flavor paper tube for heated cigarettes according to claim 1, characterized in that: During the preparation of the composite slurry, the beating degree is controlled at 33°SR~50°SR and the wet weight is 3~5g.

6. A method for preparing a hollow cooling tobacco flavor paper tube for heated cigarettes according to claim 1, characterized in that: The drying process is as follows: two sets of drying cylinders are used for drying. The pressure of the rollers inside the drying cylinder of the first set of drying cylinders is 80~100 kg / cm and the temperature of the drying cylinder is 110~130℃. The pressure of the rollers inside the drying cylinder of the second set of drying cylinders is 40~60 kg / cm and the temperature of the drying cylinder is 80~100℃.

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