Preparation method and application of reconstituted tobacco for fine cigarettes

Abstract

The invention discloses a preparation method and application of reconstituted tobacco for fine cigarettes. The preparation method comprises the following steps: 1) respectively adding water into tobacco raw materials for extraction; 2) mixing tobacco stems in the extracted tobacco raw materials with tobacco powder to prepare pulp; 3) further pulping the raw material wood pulp into wood pulp; 4) mixing tobacco pulp and wood pulp to prepare pulp, and adding calcium carbonate to obtain mixed pulp; 5) respectively concentrating the extracted tobacco stem extracting solution and tobacco powder extracting solution under reduced pressure to obtain a tobacco stem concentrated solution and a tobacco powder concentrated solution; (6) the mixed pulp is made with paper through a fourdrinier, and a reconstituted tobacco substrate is produced; (7) reconstituted tobacco substrates are wrinkled through wrinkling equipment; 8) blending the tobacco stems and the tobacco powder concentrated solution in proportion to prepare a coating solution; and (9) the wrinkled substrate is coated with the coating liquid, the reconstituted tobacco is prepared through drying and slitting, and the reconstituted tobacco slices are in a regular hexagon shape. According to the method, low-basis-weight substrate production, substrate wrinkling and regular hexagon slice shapes are combined and optimized, the physical characteristics of the reconstituted tobacco and the distribution state of shredded tobacco shreds are improved, and the blending uniformity of the tobacco shreds of the reconstituted tobacco and the tobacco shreds for fine cigarettes is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco, and in particular relates to a preparation method and application of reconstituted tobacco leaves for medium and slim cigarettes. Background Art

[0002] Reconstituted tobacco, also known as tobacco flakes, homogenized tobacco or reconstructed tobacco, has the characteristics of high filling value, good combustion performance and low tar release. Using reconstituted tobacco to replace or partially replace traditional shredded tobacco in the preparation of cigarettes is one of the effective means to reduce tar and reduce the harm of cigarettes.

[0003] In recent years, with the rapid development of slim cigarettes, due to the differences in cigarette circumference and the physical properties of existing reconstituted tobacco leaves, it is difficult to use existing reconstituted tobacco leaves in large proportions in slim cigarettes, which affects the tar-reducing and harm-reducing effects of reconstituted tobacco leaves. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a preparation method and application of reconstituted tobacco leaves for slim cigarettes.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing reconstituted tobacco leaves for slim cigarettes comprises the following steps:

[0007] 1) extracting tobacco raw materials by adding water respectively;

[0008] 2) mixing the tobacco stems and tobacco dust in the tobacco raw material extracted in step 1) to prepare pulp, wherein the beating degree is controlled at 20-25°SR, the wet weight is controlled at 3.5±1g, and the tobacco pulp concentration is controlled at 3-4%;

[0009] 3) further beating the raw wood pulp into wood pulp, with the beating degree controlled at 50-60°SR and the concentration controlled at 3-4%;

[0010] 4) mixing the tobacco pulp and wood pulp obtained in step 2) to step 3), adding calcium carbonate to obtain a mixed slurry, wherein the concentration of the mixed slurry is controlled at 1-2%;

[0011] 5) The tobacco stem extract and the tobacco dust extract extracted in step 1) are concentrated under reduced pressure to obtain tobacco stem and tobacco dust concentrates, respectively, wherein the concentration of the concentrates is controlled at 37-40%;

[0012] 6) The mixed slurry in step 4) is papered using a fourdrinier paper machine to produce a reconstituted tobacco leaf base sheet, wherein the base sheet weight is controlled at 40-60 g / ㎡;

[0013] 7) using a corrugating device to corrugate the reconstituted tobacco leaf substrate in step 6), with the corrugation rate being controlled at 8%-20%;

[0014] 8) The tobacco stem and tobacco powder concentrate prepared in step 5) are mixed in proportion to prepare a coating liquid;

[0015] 9) coating the coating liquid in step 8) onto the corrugated substrate in step 7), drying and cutting to produce reconstituted tobacco leaves, wherein the cut pieces of the reconstituted tobacco leaves are regular hexagons with side lengths of 8-20 mm.

[0016] Using a lower basis weight for base sheet production can reduce the thickness of reconstituted tobacco leaves, and wrinkling the base sheet can improve the softness of reconstituted tobacco leaves. The two can improve the physical properties of reconstituted tobacco leaves. Using a regular hexagonal cutting shape can improve the uniformity of the length of the cut reconstituted tobacco leaves after shredding, and improve the uniformity of blending with shredded tobacco.

[0017] Preferably, in step 6), the basis weight of the substrate is controlled at 45-55 g / m2.

[0018] Further preferably, the basis weight of the substrate is controlled at 50 g / m2.

[0019] Preferably, in step 7), the wrinkling rate of the substrate is controlled at 10%-15%.

[0020] Further preferably, the wrinkling rate of the base sheet is controlled at 12%.

[0021] Preferably, in step 9), the cut side length of the regular hexagonal reconstituted tobacco leaves is 8-20 mm.

[0022] Further preferably, the cut side length of the regular hexagonal reconstituted tobacco leaf is 10 mm.

[0023] The above-mentioned slim cigarettes are made from reconstituted tobacco leaves prepared by the method for preparing reconstituted tobacco leaves.

[0024] Application of the method for preparing reconstituted tobacco leaves for slim cigarettes in preparing reconstituted tobacco leaves.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention adopts a low-quantity base sheet to produce reconstituted tobacco, which reduces the thickness of the finished reconstituted tobacco by 20%, reduces the thickness difference between the reconstituted tobacco and natural tobacco, and improves the quality of the reconstituted tobacco.

[0027] 2. The present invention adopts the corrugation technology to corrugate the base sheet, thereby increasing the softness of the reconstituted tobacco by more than 20%. The reconstituted tobacco is easier to curl after being cut into shreds, and its shape is close to that of natural tobacco shreds, thereby increasing the mixing uniformity of the reconstituted tobacco shreds and the natural tobacco shreds.

[0028] 3. Compared with the conventional parallelogram slice type, the regular hexagonal slice type adopted in the present invention can improve the uniformity of the length of the cut tobacco leaves after the cut tobacco leaves are cut, and improve the uniformity of the mixing of the cut tobacco leaves of the cut tobacco leaves and the natural tobacco leaves. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Example 1

[0032] 1) adding clean water to tobacco waste in a solid-liquid ratio of 1:8, the soaking and extraction temperature is 85° C., the soaking and extraction time is 30 min, and after solid-liquid separation, a tobacco end extract, a tobacco stem extract, a tobacco end residue and a tobacco stem residue are obtained respectively;

[0033] 2) mixing the tobacco residue and tobacco stem residue in step 1) to prepare pulp, with a beating degree of 28°SR, a wet weight of 3.5 g, and a concentration of 3%;

[0034] 3) further beating the raw wood pulp into wood pulp, with the beating degree controlled at 55°SR and the concentration controlled at 3%;

[0035] 4) After mixing the tobacco pulp and wood pulp obtained in step 2) to step 3) at a mass ratio of 9:1, 15% of the absolute dry weight of the pulp calcium carbonate is added to obtain a mixed pulp, and the concentration of the mixed pulp is 1%;

[0036] 5) The tobacco stem extract and the tobacco dust extract extracted in step 1) are concentrated under reduced pressure to obtain tobacco stem and tobacco dust concentrates, respectively, wherein the concentration of the concentrates is controlled at 39%;

[0037] 6) The mixed slurry in step 4) is paper-made using a fourdrinier paper machine to produce a reconstituted tobacco leaf base sheet with a basis weight of 50 g / ㎡;

[0038] 7) using a corrugating device to corrugate the reconstituted tobacco leaf substrate in step 6) at a corrugation rate of 15%;

[0039] 8) The tobacco stem and tobacco powder concentrate in step 5) are mixed in an absolute dry weight ratio of 3:7 to prepare a coating liquid;

[0040] 9) The coating liquid in step 8) is coated on the corrugated substrate in step 7), and the reconstituted tobacco leaves are prepared by drying and cutting. The cut pieces of the reconstituted tobacco leaves are regular hexagons with a side length of 10 mm.

[0041] Comparative Example 1

[0042] The difference from Example 1 is that in step 6), the basis weight is 60 g / ㎡; in step 7), wrinkling is not performed; in step 9), the slicing pattern is a rhombus with a side length of 25 mm and an acute angle of 60°.

[0043] Comparative evaluation

[0044] Table 1 Physical indicators

[0045] serial number Thickness(mm) Softness(mN) Example 1 0.18 276 Comparative Example 1 0.22 362

[0046] Note: The smaller the softness value, the higher the softness.

[0047] Table 2 Distribution of shredded length

[0048]

[0049] It can be seen from the data in Table 2 that the tobacco cut into shreds of the product of the present invention has a more concentrated length distribution and a more uniform shape.

[0050] Example 2

[0051] 1) adding clean water to tobacco waste in a solid-liquid ratio of 1:8, the soaking and extraction temperature is 85° C., the soaking and extraction time is 30 min, and after solid-liquid separation, a tobacco end extract, a tobacco stem extract, a tobacco end residue and a tobacco stem residue are obtained respectively;

[0052] 2) mixing the tobacco residue and tobacco stem residue in step 1) to prepare pulp, with a beating degree of 30°SR, a wet weight of 3.2 g, and a concentration of 3.5%;

[0053] 3) further beating the raw wood pulp into wood pulp, with the beating degree controlled at 50°SR and the concentration controlled at 3.5%;

[0054] 4) mixing the tobacco pulp and wood pulp obtained in step 2) to step 3) at a mass ratio of 9:1, and adding calcium carbonate in an amount of 15% by absolute dry weight of the pulp to obtain a mixed pulp, wherein the concentration of the mixed pulp is 1.5%;

[0055] 5) The tobacco stem extract and the tobacco dust extract extracted in step 1) are concentrated under reduced pressure to obtain tobacco stem and tobacco dust concentrates, respectively, wherein the concentration of the concentrates is controlled at 37%;

[0056] 6) The mixed slurry in step 4) is papered using a fourdrinier paper machine to produce a reconstituted tobacco leaf base sheet with a basis weight of 55 g / ㎡;

[0057] 7) using a corrugating device to corrugate the reconstituted tobacco leaf substrate in step 6) at a corrugation rate of 10%;

[0058] 8) The tobacco stem and tobacco powder concentrate in step 5) are mixed in an absolute dry weight ratio of 4:6 to prepare a coating liquid;

[0059] 9) The coating liquid in step 8) is coated on the corrugated substrate in step 7), and the reconstituted tobacco leaves are prepared by drying and cutting. The cut pieces of the reconstituted tobacco leaves are regular hexagons with a side length of 15 mm.

[0060] Comparative Example 2

[0061] The difference from Example 2 is that in step 6), the basis weight is 60 g / ㎡; in step 7), wrinkling is not performed; in step 9), the slicing pattern is a rhombus with a side length of 25 mm and an acute angle of 60°.

[0062] Comparative evaluation

[0063] Table 3 Physical indicators

[0064] serial number Thickness(mm) Softness(mN) Example 2 0.18 276 Comparative Example 2 0.22 362

[0065] Note: The smaller the softness value, the higher the softness.

[0066] Table 4 Distribution of shredded length

[0067]

[0068] It can be seen from the data in Table 4 that the tobacco shreds of the product of the present invention are more concentrated in length distribution and more uniform in shape after being cut.

[0069] Application test

[0070] Using a certain brand of slim cigarette shreds from Shandong as raw materials, the influence of the present invention on the sensory quality of slim cigarettes and its blending effect were tested.

[0071] Step 1

[0072] 2%, 4%, 6% and 8% of the sample of the embodiment were added to the cigarette shredded tobacco respectively, and after uniform mixing, slim cigarettes were prepared for sensory quality evaluation. The evaluation results are shown in Table 5.

[0073] Table 5

[0074]

[0075] It can be seen from the data in Table 5 that the product of the present invention can be blended into shredded tobacco, which can significantly improve the blending uniformity of reconstituted tobacco shreds and slim cigarette shredded tobacco relative to the control sample. When the proportion of reconstituted tobacco added is increased, the sensory consistency of the front and back puffs of the slim cigarettes can still be achieved during the sensory evaluation of the slim cigarettes.

[0076] Although the above describes the specific implementation methods of the present invention, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A method for preparing reconstituted tobacco for slim cigarettes, comprising the following steps: 1) Extract the tobacco raw materials by adding water respectively; 2) mixing the tobacco stems and tobacco dust in the tobacco raw material extracted in step 1) to prepare pulp, wherein the beating degree is controlled at 20-25°SR, the wet weight is controlled at 3.5±1g, and the tobacco pulp concentration is controlled at 3-4%; 3) further beating the raw wood pulp into wood pulp, with the beating degree controlled at 50-60°SR and the concentration controlled at 3-4%; 4) After mixing the tobacco pulp and wood pulp obtained in step 2) to step 3), calcium carbonate is added to obtain a mixed slurry, and the concentration of the mixed slurry is controlled at 1-2%; 5) The tobacco stem extract and the tobacco dust extract extracted in step 1) are concentrated under reduced pressure to obtain tobacco stem and tobacco dust concentrates, respectively, and the concentration of the concentrates is controlled at 37-40%; 6) The mixed slurry in step 4) is papered using a fourdrinier paper machine to produce a reconstituted tobacco leaf base sheet, wherein the base sheet weight is controlled at 40-60 g / ㎡; 7) Using a corrugating device to corrugate the reconstituted tobacco leaf substrate in step 6), the corrugation rate being controlled at 8%-20%; 8) The tobacco stem and tobacco powder concentrate prepared in step 5) are mixed in proportion to prepare a coating liquid; 9) The coating liquid in step 8) is coated on the corrugated substrate in step 7), and the reconstituted tobacco leaves are prepared by drying and cutting. The cut pieces of the reconstituted tobacco leaves are regular hexagons with a side length of 8-20 mm.

2. The method for preparing reconstituted tobacco for slim cigarettes according to claim 1, characterized in that: In step 6), the basis weight is controlled at 45-55 g / ㎡; Preferably, in step 6), the basis weight of the substrate is controlled at 50 g / m2.

3. The method for preparing reconstituted tobacco for slim cigarettes according to claim 1, characterized in that: In step 7), the wrinkling rate of the substrate is controlled at 10%-15%; Preferably, in step 7), the wrinkling rate of the substrate is controlled at 12%.

4. The method for preparing reconstituted tobacco for slim cigarettes according to claim 1, characterized in that: In step 9), the length of the cut side of the regular hexagonal reconstituted tobacco leaf is 8-20 mm. Preferably, in step 9), the length of the cut side of the regular hexagonal reconstituted tobacco leaf is 10 mm.

5. Reconstituted tobacco prepared by the method for preparing reconstituted tobacco for slim cigarettes according to any one of claims 1 to 4.

6. Use of the method for preparing reconstituted tobacco for slim cigarettes according to claim 5 in preparing reconstituted tobacco.

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