A reconstituted tobacco leaf with the appearance of tobacco fibers and its preparation method
By optimizing the pulping parameters and colloids, the problem of the absence of tobacco fiber on the surface of reconstituted tobacco leaves was solved, and the uniformity and performance of reconstituted tobacco leaves were improved, making them suitable for industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHONGYAN SHIWEICE (YUNNAN) RECONSTITUTED TOBACCO CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-05-26
Smart Images
Figure CN122074692A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of reconstituted tobacco preparation technology, and particularly to a reconstituted tobacco leaf with a tobacco fiber appearance and its preparation method. Background Technology
[0002] Reconstituted tobacco using the papermaking method is an important supplementary raw material product for the tobacco industry. It is produced through processes such as pulping, forming, and drying of tobacco raw materials, effectively utilizing waste materials from tobacco production and improving the utilization rate of tobacco resources. Currently, in the traditional papermaking process for reconstituted tobacco, tobacco raw materials (including tobacco stems, fragments, tobacco dust, and ash sticks) are usually mixed with added fibers and then pulped together. After the tobacco raw materials and wood pulp are mixed and pulped as a whole, the resulting reconstituted tobacco product lacks a noticeable tobacco fiber appearance, resulting in a significant difference in texture and appearance compared to natural tobacco leaves.
[0003] Meanwhile, the traditional process uses uniformly set pulping parameters for tobacco raw materials (including stems, fragments, tobacco dust, ash sticks, etc.) and added fibers, which cannot be adapted to the fiber characteristics of different raw materials. This easily leads to problems such as insufficient pulping of some raw materials and excessive pulping of others, affecting not only the uniformity of the pulp but also causing a decline in the physical properties and sensory quality of reconstituted tobacco. In addition, the existing reconstituted tobacco formulation lacks targeted optimization, and the selection and addition amount of colloids are not matched with the characteristics of the raw materials, further affecting the fiber appearance forming effect and overall quality of the product.
[0004] Therefore, developing a papermaking method for preparing reconstituted tobacco leaves that can preserve the appearance of tobacco fibers and adapt to the characteristics of different raw materials has become an urgent problem to be solved in the industry. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a reconstituted tobacco leaf with a tobacco fiber appearance and a method for preparing the same, thereby solving the above-mentioned problems existing in the prior art, effectively preserving the tobacco stem fiber structure, making the surface of the prepared reconstituted tobacco leaf show obvious tobacco fiber appearance, and improving the uniformity of the pulp and the physical properties and sensory quality of the reconstituted tobacco leaf.
[0006] The technical problem to be solved by the present invention is achieved through the following technical solution:
[0007] A papermaking reconstituted tobacco leaf with the appearance of tobacco fiber comprises the following components in parts by weight: 20-40 parts tobacco stems, 30-50 parts added fiber, 40-50 parts tobacco powder, and 0.4-2 parts colloid.
[0008] Preferably, the above technical solution includes the following components by weight: 30 parts tobacco stems, 40 parts added fiber, 45 parts tobacco powder, and 1.2 parts colloid.
[0009] Preferably, in the above technical solution, the tobacco stem is a long stem with a length greater than 5cm; the tobacco powder is 600-800 mesh; and the added fiber is one or more combinations of needle leaf pulp, broad leaf pulp, hemp pulp, and bamboo pulp.
[0010] Preferably, in the above technical solution, the average fiber length (FLI) of the pulp obtained by pulping the long stems is 110-150; the average fiber length (FLI) of the mixed pulp obtained by pulping the tobacco powder and the added fiber is 70-95.
[0011] Preferably, in the above technical solution, the colloid is one or a combination of several of the following: tamarind polysaccharide gum, sodium carboxymethyl cellulose, cationic guar gum, guar gum, cationic starch, and polyacrylamide.
[0012] A method for preparing reconstituted tobacco leaves with a tobacco fiber appearance via papermaking includes the following steps:
[0013] (1) Raw material preparation: Weigh each raw material according to the weight percentage and set aside;
[0014] (2) Pulping of tobacco stems: Select long stems with a length greater than 5cm as tobacco stem raw materials, add hot water at 70±5℃ at a ratio of tobacco stem to water mass of 1:7, and soak and swell for 30-45 minutes; after swelling, the tobacco stems are pressed and then pulped using a single disc mill, with the pulp concentration controlled at 2.0%, mill power of 75-85kw, and pulping cycle ≥3 times to obtain stem pulp with an average fiber length (FLI) of 110-150, and store the stem pulp in a storage tank for later use;
[0015] (3) Pulping of tobacco powder and added fiber: 600-800 mesh tobacco powder and added fiber are fed at the same time, and hot water at 65±5℃ is added at a ratio of solid raw material to water of 1:3.8. The extraction time is 30min. After pressing, the extracted material is pulped by a single disc mill with a pulp concentration of 3.5%, mill power of 45-65kw, and pulping cycle ≥3 times to obtain a mixed pulp with an average fiber length (FLI) of 70-95.
[0016] (4) Slurry mixing: Mix the slurry in the storage tank of step (2) with the mixed slurry obtained in step (3) evenly, and add colloid at the same time to obtain the shaped slurry;
[0017] (5) Molding and drying: The molding slurry is sequentially processed by spreading, dewatering, coating, drying and rolling to form paper-made reconstituted tobacco leaves with the appearance of tobacco fibers.
[0018] Preferably, in the above technical solution, in steps (2) and (3), the pressing is done by an Archimedes screw press, the tobacco stems after swelling are pressed in two stages with a pressing chain torque of 50-80%; the extracted tobacco powder and added fiber are pressed in one stage with a pressing torque of 50-80%.
[0019] Preferably, in the above technical solution, in step (4), the mixing method of the slurry and the mixed slurry is stirring, the stirring speed is 200-300 r / min, and the stirring time is 15-20 min.
[0020] The above-described technical solution of the present invention has the following beneficial effects:
[0021] (1) The present invention performs independent pulping treatment on the tobacco stems, and selects long stems with a length greater than 5cm and controls the swelling and grinding parameters precisely to effectively preserve the fiber structure of the tobacco stems, so that the stem pulp has a suitable average fiber length. After mixing with the mixed pulp of tobacco powder and added fibers, the surface of the formed reconstituted tobacco leaf shows obvious tobacco fiber appearance.
[0022] (2) In view of the different characteristics of tobacco stems, tobacco powder and added fibers, the present invention sets different pulping parameters. The tobacco stem pulping adopts low concentration and high power, while the tobacco powder and added fiber pulping adopts high concentration and low power. The average fiber length of the two is precisely matched, avoiding the problem of excessive or insufficient grinding of raw materials, improving the overall uniformity of the pulp, and ensuring the physical properties of reconstituted tobacco leaves.
[0023] (3) The present invention optimizes the raw material formula ratio of reconstituted tobacco leaves, clarifies the weight range of tobacco stems, added fibers, tobacco powder and colloids, and limits the specific types of colloids. The addition of colloids is compatible with the characteristics of raw material fibers, which can effectively improve the film-forming properties of pulp and the bonding force between fibers, further ensuring the forming effect of tobacco fiber appearance, and improving the sensory quality and performance of reconstituted tobacco leaves.
[0024] (4) The preparation method of the present invention has clear process steps, precise and controllable process parameters, and is easy to industrialize and promote. It can effectively improve the added value of paper-making reconstituted tobacco leaves and meet the development needs of the tobacco industry. Attached Figure Description
[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.
[0026] Figure 1 A flowchart illustrating the preparation process of reconstituted tobacco leaves with the appearance of tobacco fibers.
[0027] Figure 2This is a flowchart of the conventional reconstituted tobacco preparation process. Detailed Implementation
[0028] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the invention.
[0029] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the materials and reagents used are commercially available. Unless otherwise specified, the equipment used in the experiments is well known to those skilled in the art.
[0030] Example 1
[0031] A method for preparing reconstituted tobacco leaves with a tobacco fiber appearance via papermaking includes the following steps:
[0032] (1) Pulping of tobacco stems: Select long stems with a length of 6cm, add hot water at 65℃ at a ratio of tobacco stems to water = 1:7, and soak and swell for 30 minutes; after swelling, the tobacco stems are pressed by Archimedes screw in two stages, and after the pressing chain torque is 50%, they are ground by a single disc mill with a pulp concentration of 2.0% and a mill power of 75kw. The pulp is circulated 3 times to obtain stem pulp with an average fiber length (FLI) of 110, which is stored in the pulp storage tank.
[0033] (2) Pulping of tobacco powder and added fiber: 600 mesh tobacco powder and softwood pulp were added in proportion, and hot water at 60°C was added. The mixture was extracted for 30 minutes at a ratio of solid matter: water = 1:3.8. The extracted material was then pressed by an Archimedes screw press at 50% torque, and then ground by a single disc mill with a pulp concentration of 3.5%, mill power of 45kw, and pulping cycle of 3 times to obtain a mixed pulp with an average fiber length (FLI) of 70.
[0034] (3) Mixing the pulp: Mix the stem pulp with the mixed pulp, add tamarind polysaccharide gum, and the raw materials of the molded pulp are as follows by weight: 20 parts of tobacco stems, 50 parts of needle leaf pulp, 40 parts of tobacco powder, and 0.4 parts of tamarind polysaccharide gum. Mix evenly.
[0035] (4) Molding and drying: The molding slurry is sequentially spread, dehydrated, coated, dried and rolled to obtain reconstituted tobacco material rolls. Specifically, after the slurry is spread and molded, it is first dried and dehydrated in a small vat group, then the concentrated extract is coated onto the molding substrate, and finally tunnel drying is used. The drying temperature is from low to high, with the highest drying temperature ≤90℃. Finally, the reconstituted tobacco material rolls are obtained by rolling.
[0036] Example 2
[0037] A method for preparing reconstituted tobacco leaves with a tobacco fiber appearance via papermaking includes the following steps:
[0038] (1) Pulping of tobacco stems: Select long stems with a length of 7cm, add hot water at 70℃ at a ratio of tobacco stems to water = 1:7, and soak and swell for 38 minutes; after swelling, the tobacco stems are pressed by Archimedes screw in two stages, and after the pressing chain torque is 65%, they are ground by a single disc mill with a pulp concentration of 2.0% and a mill power of 80kw. The pulp is circulated 4 times to obtain stem pulp with an average fiber length (FLI) of 130, which is stored in the pulp storage tank.
[0039] (2) Pulping of tobacco powder and added fiber: 700 mesh tobacco powder is mixed with broad leaf pulp and bamboo pulp in proportion and fed into the feed. Hot water at 65°C is added and extracted for 30 min at a solid-to-water ratio of 1:3.8. After extraction, the material is pressed by Archimedes screw press at 65% torque and then ground by single disc mill with a pulp concentration of 3.5%, mill power of 55kw, and pulping cycle of 4 times to obtain a mixed pulp with an average fiber length (FLI) of 82.
[0040] (3) Mixing the pulp: Mix the stem pulp with the mixed pulp, add the composite colloid of sodium carboxymethyl cellulose and cationic guar gum, and the raw materials of the molded pulp are as follows by weight: 30 parts tobacco stems, 20 parts broadleaf pulp, 20 parts bamboo pulp, 45 parts tobacco powder, and 1.2 parts composite colloid. Mix evenly.
[0041] (4) Molding and drying: The molding slurry is sequentially spread, dehydrated, dried and rolled to obtain reconstituted tobacco material rolls. Specifically, after the slurry is spread and molded, it is first dried and dehydrated in a small vat group, then the concentrated extract is coated onto the molding substrate, and finally tunnel drying is used. The drying temperature is from low to high, with the highest drying temperature ≤90℃. Finally, the reconstituted tobacco material rolls are obtained by rolling.
[0042] Example 3
[0043] A method for preparing reconstituted tobacco leaves with a tobacco fiber appearance via papermaking includes the following steps:
[0044] (1) Pulping of tobacco stems: Select long stems with a length of 8cm, add hot water at 75℃ at a ratio of tobacco stems to water = 1:7, and soak and swell for 45min; after swelling, the tobacco stems are pressed by Archimedes screw in two stages, and after the pressing chain torque is 80%, they are ground by a single disc mill with a pulp concentration of 2.0% and a mill power of 85kw. The pulp is circulated 5 times to obtain stem pulp with an average fiber length (FLI) of 150, which is stored in the pulp storage tank.
[0045] (2) Pulping of tobacco powder and added fiber: 800 mesh tobacco powder and hemp pulp were fed into the feed, and hot water at 70°C was added. The mixture was extracted for 30 minutes at a ratio of solid matter: water = 1:3.8. The extracted material was then pressed by an Archimedes screw press at 80% torque, and then ground by a single disc mill with a pulp concentration of 3.5%, a mill power of 65kw, and 5 pulping cycles to obtain a mixed pulp with an average fiber length (FLI) of 95.
[0046] (3) Mixing the slurry: Mix the stem slurry with the mixed slurry, add the composite colloid of polyacrylamide, cationic starch and guar gum, and the raw materials of the slurry are as follows by weight: 40 parts tobacco stems, 30 parts hemp pulp, 50 parts tobacco powder and 2 parts composite colloid, and mix evenly;
[0047] (4) Molding and drying: The molding slurry is sequentially spread, dehydrated, dried and rolled to obtain reconstituted tobacco material rolls. After the slurry is spread and molded, it is first dried and dehydrated in a small vat group, then the concentrated extract is coated onto the molding substrate, and finally tunnel drying is used. The drying temperature is from low to high, with the highest drying temperature ≤90℃. Finally, the reconstituted tobacco material rolls are obtained by rolling.
[0048] The reconstituted tobacco material rolls prepared in the above embodiments all exhibit a clear tobacco fiber appearance on the surface, with uniform fiber distribution and no powdering or delamination. Their physical properties and sensory quality are superior to those of reconstituted tobacco products prepared by traditional processes.
[0049] Comparative Example 1
[0050] (1) Pulping: Tobacco raw materials such as tobacco stems, fragments, and tobacco dust and added fibers are mixed in a certain proportion (hereinafter referred to as raw materials). The raw materials are soaked and extracted twice in hot water at 65°C at a ratio of 1:7 and 1:6, respectively, for 30 minutes each time. The extracted raw materials are first pressed by an Archimedes screw press and then by a multi-stage press screw press with a press chain torque of 60%. A single disc mill is used for grinding, with a grinding concentration of 3.0% and a mill power of 85kw. A single grinding is performed to obtain a pulp with an average fiber length (FLI) of 150, which is stored in a pulp storage tank.
[0051] (2) Extraction concentration: The extract obtained from the two extractions is concentrated by passing it through a five-effect evaporator. The concentration of the concentrate is 46-60%, and it is transferred to a storage tank for later use.
[0052] (3) Forming: Add single or composite colloids of polyacrylamide, cationic starch and guar gum, and form the prepared slurry by spreading, dehydrating and drying to obtain uncoated reconstituted tobacco leaves;
[0053] (4) Coating and drying: Additives and flavorings are added to the concentrate to prepare a coating liquid. The concentrated extract is then coated onto the molded substrate. Finally, tunnel drying is used at a temperature of 90-110℃. Finally, the reconstituted tobacco leaves are obtained by slitting.
[0054] The products of Examples 1-3 and Comparative Example 1 were tested, and the data are shown in Table 1.
[0055] Table 1 Summary of Product Testing Data
[0056]
[0057] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different choices and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims and their equivalents.
Claims
1. A papermaking reconstituted tobacco leaf with the appearance of tobacco fibers, characterized in that, It includes the following components by weight: 20-40 parts tobacco stems, 30-50 parts added fiber, 40-50 parts tobacco powder, and 0.4-2 parts colloid.
2. The reconstituted tobacco leaf with a tobacco fiber appearance as described in claim 1, characterized in that, It includes the following components by weight: 30 parts tobacco stems, 40 parts added fiber, 45 parts tobacco powder, and 1.2 parts colloid.
3. The reconstituted tobacco leaf with a tobacco fiber appearance as described in claim 1, characterized in that, The tobacco stem is a long stem with a length greater than 5cm; the tobacco powder is 600-800 mesh; the added fiber is one or more of the following: needle pulp, broad-leaf pulp, hemp pulp, and bamboo pulp.
4. The reconstituted tobacco leaf with a tobacco fiber appearance as described in claim 3, characterized in that, The pulp obtained by pulping the long stems has an average fiber length of 110-150 mm; the mixed pulp obtained by pulping the tobacco powder and the added fiber has an average fiber length of 70-95 mm.
5. The reconstituted tobacco leaf with a tobacco fiber appearance as described in claim 3, characterized in that, The colloid is one or a combination of several of the following: tamarind polysaccharide gum, sodium carboxymethyl cellulose, cationic guar gum, cationic starch, and polyacrylamide.
6. A method for preparing reconstituted tobacco leaves with a tobacco fiber appearance as described in any one of claims 1-5, characterized in that, Includes the following steps: (1) Raw material preparation: Weigh each raw material according to the weight percentage and set aside; (2) Pulping of tobacco stems: Select long stems with a length greater than 5cm as tobacco stem raw materials, add hot water at 70±5℃ at a ratio of tobacco stem to water of 1:7, and soak and swell for 30-45 minutes; after swelling, the tobacco stems are pressed and then pulped using a single disc mill. The pulp concentration is controlled at 2.0%, the mill power is 75-85kw, and the pulping cycle is ≥3 times to obtain stem pulp with an average fiber length of 110-150. The stem pulp is stored in a pulp storage tank for later use. (3) Pulping of tobacco powder and added fiber: 600-800 mesh tobacco powder and added fiber are fed at the same time, and hot water at 65±5℃ is added at a ratio of solid raw material to water of 1:3.
8. The extraction time is 30min. After pressing, the extracted material is pulped by a single disc mill with a pulp concentration of 3.5%, mill power of 45-65kw, and pulping cycle ≥3 times to obtain a mixed pulp with an average fiber length of 70-95. (4) Slurry mixing: Mix the slurry in the storage tank of step (2) with the mixed slurry obtained in step (3) evenly, and add colloid at the same time to obtain the shaped slurry; (5) Molding and drying: The molding slurry is sequentially processed by spreading, dewatering, coating, drying and rolling to form paper-made reconstituted tobacco leaves with the appearance of tobacco fibers.
7. The preparation method according to claim 6, characterized in that, In steps (2) and (3), the pressing is done using an Archimedes screw press. After the tobacco stems are swollen, they are pressed in two stages with a pressing chain torque of 50-80%. After extraction, the tobacco powder and added fiber are pressed in one stage with a pressing torque of 50-80%.
8. The preparation method according to claim 6, characterized in that, In step (4), the mixing method of the slurry and the mixed slurry is stirring, the stirring speed is 200-300 r / min, and the stirring time is 15-20 min.