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WO2025086252A1 - Tabac reconstitué, son procédé de préparation et son utilisation - Google Patents

Tabac reconstitué, son procédé de préparation et son utilisation Download PDF

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Publication number
WO2025086252A1
WO2025086252A1 PCT/CN2023/127121 CN2023127121W WO2025086252A1 WO 2025086252 A1 WO2025086252 A1 WO 2025086252A1 CN 2023127121 W CN2023127121 W CN 2023127121W WO 2025086252 A1 WO2025086252 A1 WO 2025086252A1
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WIPO (PCT)
Prior art keywords
magnetic
tobacco
reconstituted tobacco
nanofiber
fiber
Prior art date
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Pending
Application number
PCT/CN2023/127121
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English (en)
Chinese (zh)
Inventor
韩熠
尚善斋
田永峰
龚为民
洪鎏
李廷华
张霞
朱东来
秦云华
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China Tobacco Yunnan Industrial Co Ltd
Original Assignee
China Tobacco Yunnan Industrial Co Ltd
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Filing date
Publication date
Application filed by China Tobacco Yunnan Industrial Co Ltd filed Critical China Tobacco Yunnan Industrial Co Ltd
Publication of WO2025086252A1 publication Critical patent/WO2025086252A1/fr
Pending legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco

Definitions

  • the invention belongs to the field of tobacco, and in particular relates to a reconstituted tobacco leaf, a preparation method and use thereof.
  • Existing heat-not-burn aerosol products usually use reconstituted tobacco leaves or tobacco particles as the aerosol-forming matrix.
  • the thick slurry method and papermaking method are the main methods for producing reconstituted tobacco leaves used in existing heat-not-burn aerosol products.
  • the thick slurry method requires drying to remove a large amount of water, and the process energy consumption is high; the finished product is brittle, has low strength, and also produces high reconstitution losses during cutting.
  • the papermaking method causes serious loss of flavor substances in the finished product, and drying and dehydration also requires a lot of energy consumption and the drying process is complicated.
  • Existing aerosol products often use induction heating to atomize the required components in the aerosol-forming matrix from the product to form an inhalable aerosol.
  • the receptor is a separate element and transfers its induction heat to the entire aerosol-forming matrix by local contact (central type) or non-contact (circumferential type) with the aerosol-forming matrix.
  • the disadvantage of central heating is that the induction heat of the receptor is transferred from the center of the aerosol-forming matrix in contact with it to its periphery, and the heat decays significantly from the inside to the outside;
  • the disadvantage of circumferential heating is that the induction heat of the receptor is transferred from the periphery of the aerosol-forming matrix wrapping material in contact with it to the center of the aerosol-forming matrix after penetrating the wrapping material, and the heat decays significantly from the outside to the inside. Therefore, in order to achieve the expected atomization effect of the aerosol-forming matrix, it is necessary to extend the preheating time of the product and increase the maximum heating temperature, thereby increasing the output power of the inductor. In addition to causing low thermal utilization efficiency and uneven heat distribution of the aerosol-forming matrix, the adverse effects brought about by this also increase the energy consumption of the heating device used to heat the aerosol product.
  • the present invention is proposed for this purpose.
  • the present invention proposes a magnetic reconstituted tobacco leaf foil and magnetic reconstituted tobacco leaf particles and a manufacturing method thereof, wherein a magnetic induction material is integrated into an aerosol forming matrix, and the magnetic aerosol is used to form a magnetic reconstituted tobacco leaf foil.
  • a magnetic induction material is integrated into an aerosol forming matrix
  • the magnetic aerosol is used to form a magnetic reconstituted tobacco leaf foil.
  • the first aspect of the present invention discloses a magnetic reconstituted tobacco leaf, which comprises a magnetic reconstituted tobacco leaf foil and/or a magnetic reconstituted tobacco leaf particle; the thickness of the magnetic reconstituted tobacco leaf foil is 0.10-0.30 mm, and the particle size of the magnetic reconstituted tobacco leaf particle is 0.5-2 mm; the magnetic reconstituted tobacco leaf composition comprises a fiber material, a tobacco material, a nanofiber and a magnetic material; the magnetic material is a material that can be converted into heat after absorbing an alternating magnetic field.
  • the magnetic material is a magnetic nanomaterial
  • the magnetic nanomaterial is magnetic nanoparticles and/or magnetic nanowires
  • the magnetic nanowires have a length of 5-100 ⁇ m and a diameter of 5-500 nm.
  • the nanofiber is a plant nanofiber and/or a tobacco nanofiber; the nanofiber has a length of 1-10 ⁇ m and a diameter of 5-500 nm; and the fiber material is a cellulose fiber and/or a tobacco fiber material.
  • the second aspect of the present invention discloses a method for preparing the magnetic reconstituted tobacco, comprising the following steps:
  • the binder is one or more of starch, gum arabic, xanthan gum, guar gum, CMC and/or nanofiber gel;
  • step (3) stirring and mixing the solid mixture of step (1) and the liquid mixture of step (2) to obtain a dough-like material having a water content of 20-40 wt %;
  • step (3) compressing the dough obtained in step (3) into a parison using an extruder
  • step (4) subjecting the preform obtained in step (4) to multi-stage lamination at a certain temperature to obtain a foil having a thickness of 0.10-0.30 mm, and then drying the preform to reduce the moisture content to 5-10 wt %, thereby obtaining a reconstituted tobacco leaf foil;
  • step (4) The preform obtained in step (4) is crushed into irregular particles using a rotary granulator, and dried to reduce the moisture content to 1-6 wt %; and particles with a particle size of 0.5-2 mm are obtained by sieving, i.e., reconstituted tobacco leaf particles are obtained.
  • the method for preparing the magnetic reconstituted tobacco comprises the following steps:
  • step (D) applying the semi-wet mixture of step (A) on the base of step (C), and then inserting the obtained base into a laminating roller for multi-stage lamination at a certain temperature to obtain a sheet with a thickness of 0.10-0.30 mm; applying an adhesive layer on the surface of the laminating roller before inserting the base into the laminating roller;
  • the binder used in the binder layer is one or more of starch, gum arabic, xanthan gum, guar gum, CMC and/or nanofiber gel;
  • step (E) Drying the thin slice obtained in step (B) or step (D) to reduce the moisture content to 5-10wt%, thereby obtaining the magnetic laminated reconstituted tobacco leaf foil.
  • the method for preparing the magnetic reconstituted tobacco comprises the following steps:
  • step (c) mixing the tobacco pulp of step (a) and the magnetic nanocomposite fiber pulp of step (b) to obtain a magnetic pulp, wherein the mass percentage of the magnetic nanocomposite fibers is 1%-5wt%; and using a sheet machine to carry out oriented arrangement and papermaking to obtain a magnetic tobacco sheet base;
  • a magnetic tobacco sheet base having a core layer of magnetic nanocomposite fibers is obtained by using a sheet machine;
  • step (e1) performing multi-stage lamination on the magnetic tobacco sheet obtained in step (c) at a certain temperature to obtain a magnetic reconstituted tobacco sheet with a thickness of 0.10-0.30 mm;
  • step (f1) coating the wet coating material of step (4) on the magnetic reconstituted tobacco leaf base obtained in step (e1), and drying to make the moisture content of the wet coating material be 5-10 wt %, thereby obtaining the magnetic reconstituted tobacco leaf foil;
  • step (e2) coating the semi-wet coating material of step (d) on the tobacco sheet base of step (c);
  • step (f2) performing multi-stage lamination on the tobacco sheet base coated in step (e2), and drying the sheet base to obtain a moisture content of 5-10 wt %, thereby obtaining the magnetic reconstituted tobacco leaf foil.
  • the method for preparing the magnetic reconstituted tobacco comprises the following steps:
  • step 2) adding a binder solution and a surfactant polyvinyl pyrrolidone to the tobacco pulp of step 1) to mix to obtain a composite fiber pulp tobacco pulp; and using a sheet machine to sheet-form to obtain a tobacco sheet base;
  • preparing a magnetic coating material comprising the steps of: vacuum-assisted filtration of a nanofiber dispersion and a magnetic nanowire suspension to obtain a nanofiber and magnetic nanowire composite gel; adding the obtained composite gel to a mixed slurry of tobacco mixture powder, tobacco extract, glycerin, propylene glycol and water, and then adding a binder solution, mixing uniformly to obtain a magnetic coating material, and maintaining a solid content of 50-80wt%;
  • step 4) coating the magnetic coating material of step 3) on the tobacco sheet base of step 2), and drying to obtain a magnetic tobacco sheet;
  • step 5) performing multi-stage lamination on the magnetic tobacco sheet obtained in step 4) at a certain temperature to obtain a magnetic reconstituted tobacco sheet with a thickness of 0.10-0.30 mm;
  • the method for preparing the magnetic reconstituted tobacco comprises the following steps:
  • step (LII) coating the semi-wet coating material of step (IV) on the tobacco sheet base of step (III);
  • step (LII) The tobacco sheet base coated in step (LII) is subjected to multi-stage lamination at a certain temperature and dried to a moisture content of 5-10 wt% to obtain a magnetic reconstituted tobacco leaf foil.
  • the pressure of the multi-stage lamination is 1-5 MPa and the temperature is 70-200°C.
  • the magnetic reconstituted tobacco foil is obtained by extruding and rolling a tobacco mixture, nanofibers and magnetic nanomaterials; the magnetic reconstituted tobacco particles are obtained by extruding, granulating and screening a tobacco mixture, nanofibers and magnetic nanomaterials; the preparation method of the magnetic reconstituted tobacco comprises: forming a dough-like object of tobacco, nanofibers and magnetic nanomaterials; adding a surface active agent to the mixture of tobacco, nanofibers and magnetic nanomaterials; Surfactants such as polyvinyl pyrrolidone (PVP) are used to facilitate the combination of magnetic nanomaterials and nanofibers; a method of continuous vacuum-assisted filtration of nanofiber dispersions and magnetic nanomaterial suspensions is used to obtain a composite gel of nanofibers and magnetic nanomaterials; the dough-like material is subjected to an extrusion process, so that the magnetic nanomaterial is subjected to hot extrusion to form an interconnected magnetic conductive path and is tightly combined with the extruded reconstituted tobacco leaf mold; temperature is
  • Magnetic reconstituted tobacco leaf foil is used for aerosol-forming matrix, which can be rolled, sliced or shredded, and then processed to form an aerosol-forming matrix;
  • the magnetic aerosol-forming matrix contains materials that can be atomized to form an inhalable aerosol at a suitable temperature, and the aerosol formed by atomization contains an atomizer, flavoring substances and/or nicotine, and may also contain other inhalable ingredients.
  • the magnetic aerosol-forming matrix is combined with the wrapping material to form an aerosol generation section, and then combined with other parts including a support section, a cooling section, and a filter section to form an aerosol product.
  • the heater on the extruder can heat the dough-like object by heat conduction, and the dough-like object can generate a large amount of heat by mutual friction and shearing with the barrel, screw and dough-like object materials of the extruder during the movement, so that the magnetic nanomaterial in the mold is hot extruded.
  • hot lamination and nano-welding can completely remove the surfactant components (such as PVP) wrapped around the periphery of the magnetic nanowires and sinter the magnetic nanowire joints, greatly reduce the contact resistance, construct an interconnected, strong and stable magnetic nanowire magnetic conductive path and eddy current network, and at the same time greatly improve the tensile strength of the reconstituted tobacco leaf foil; hot lamination and nano-welding can also greatly increase the heating temperature of the magnetic reconstituted tobacco leaf foil, because the resistance is significantly reduced after welding, resulting in an increase in the induction eddy current and electron transmission capacity inside the reconstituted tobacco leaf foil; nano-welding can improve the induction heating performance without increasing the content of magnetic nanowires, and reduce the use cost of magnetic materials.
  • surfactant components such as PVP
  • the preparation method of the present invention can disperse the nanofibers and magnetic nanomaterials uniformly and firmly into the reconstituted tobacco leaf substrate by continuous high-pressure homogenization for multiple times (generally not less than three times); vacuum-assisted filtration is conducive to the nanofibers forming an entangled network through hydrogen bonds, thereby obtaining ultra-rigid nanofibers with high thermal stability and high transparency.
  • the structure of the rice can further enhance the high temperature resistance and mechanical strength of the magnetic reconstituted tobacco leaves.
  • surfactants such as polyvinyl pyrrolidone (PVP) in the manufacturing process can wrap magnetic nanomaterials such as magnetic nanowires.
  • PVP polyvinyl pyrrolidone
  • the magnetic nanowires partially wrapped by cellulose play a skeleton role, which promotes the load transfer and energy dissipation of the magnetic reconstituted tobacco leaves during the stretching process, disperses the stress, and obtains excellent mechanical properties and structural stability.
  • Multi-stage hot lamination and nano-welding can completely remove the surfactant components (such as PVP) wrapped around the periphery of the magnetic nanowires and sinter the magnetic nanowire joints, greatly reduce the contact resistance, and construct an interconnected, strong and stable magnetic nanowire magnetic conductive path and eddy current network, and at the same time greatly improve the tensile strength of the reconstituted tobacco leaves.
  • Multi-stage hot lamination and nano-welding can also greatly increase the heating temperature of the magnetic reconstituted tobacco leaves, because the resistance is significantly reduced after welding, resulting in an increase in the induced eddy current and electron transmission capacity inside the reconstituted tobacco leaves.
  • Nano-welding can improve the induction heating performance without increasing the content of magnetic nanowires, and reduce the cost of using magnetic materials.
  • the magnetic reconstituted tobacco leaf foil and reconstituted tobacco particle manufacturing process of the present invention requires less water, the drying process is significantly reduced, and the production energy consumption is reduced. Since the foil dries faster, the finished reconstituted tobacco leaves have a stronger ability to retain flavor substances and nicotine, and less binder can be used, which reduces the influence of unpleasant odors generated during the heating process of aerosol products on the taste of smoking.
  • the thickness of the finished reconstituted tobacco leaves can be uniform and controllable by accurately adjusting the rolling mill roller spacing, and the accuracy and stability of its thickness help to ensure the consistency of downstream processes and help to ensure that important product indicators such as nicotine content are within the specified range; due to the increase in the stability and reliability of reconstituted tobacco leaves, the working stability of the heating device is also greatly improved.
  • drying and preheating of tobacco scraps and fibers is not necessary; since the extrusion molding process itself has a material bonding effect, the amount of adhesive can be greatly reduced. Therefore, the raw material and production costs can be further reduced.
  • the magnetic reconstituted tobacco of the present invention has excellent mechanical properties, thermal stability, flexibility (foil) and porosity; the ferromagnetic nanowires have a high aspect ratio and excellent mechanical properties, and are advantageous for forming flexible magnetic conductive circuits and eddy current networks; the magnetic reconstituted tobacco of the present invention has the characteristics of low driving voltage, rapid heating and high heating temperature, and can meet the requirements of energy saving, rapid heating and instant use when aerosol products are used.
  • the integral heating of the magnetic reconstituted tobacco of the present invention is that the magnetic material in the entire aerosol-forming matrix receives the radiated alternating magnetic field to form induction heat distributed in the entire aerosol-forming matrix.
  • the disadvantages of existing central induction heating also include: the insertion and removal of the receptor on the heating device easily causes the aerosol-forming matrix to move, specifically: when inserted, the aerosol-forming matrix is pushed to the nozzle end of the aerosol product, which affects the heat transfer, aerosol generation and suction force; when pulled out, part of the aerosol-forming matrix is brought out into the heating device along with the receptor, and the atomized condensate remains on the surface of the receptor, which causes the problem of cleaning residues; the built-in receptor in the above-mentioned aerosol product brings difficulties to the processing, placement and positioning of the receptor in the aerosol-forming matrix during the product manufacturing process.
  • the uniform layered network distribution of the magnetic material in the magnetic reconstituted tobacco leaf of the present invention in the reconstituted tobacco leaf foil and the uniform spherical network distribution in the particles greatly shortens the magnetic heat conversion path.
  • the magnetic material in the aerosol forming matrix basically transfers its heat to the aerosol forming matrix as a whole instantaneously, and the aerosol forming matrix greatly improves the heat utilization efficiency, which in turn greatly reduces the energy consumption of the heating device.
  • the aerosol forming matrix itself is the induction heating body of the aerosol product containing it, there is no need to heat the aerosol product in the aerosol forming matrix.
  • the volume of the heating device is greatly reduced, the difficulty of manufacturing the aerosol product is reduced, and the manufacturing cost is saved while facilitating the portability of the heating device.
  • the magnetic reconstituted tobacco leaf of the present invention is used for the magnetic aerosol forming matrix not by applying a whole block magnetic material on the surface or inside of the aerosol forming matrix, but by adjusting the area fraction of a small amount of magnetic nano material therein, and spreading the magnetic nano material in the reconstituted tobacco leaf foil by hot extrusion, hot lamination and nano welding, or by mixing the magnetic nano material in the reconstituted tobacco particles by hot extrusion and rotary extrusion in the rotary granulation process, which greatly increases the magnetic induction surface area and increases the interconnectivity of the magnetic nano material; due to the thin thickness of the magnetic reconstituted tobacco leaf foil (0.10-0.30mm) and the small particle size of the magnetic reconstituted tobacco leaf particles ( 0.5-2mm), which greatly reduces the skin depth of the magnetic field inside the magnetic nanomaterial, not only making the magnetic flux attenuation smaller, but also greatly reducing the resistance of the magnetic network; therefore, under the influence of increased conductivity and reduced thermal resistance, the initial temperature set by the heating device can be controllably reduced,
  • the magnetic reconstituted tobacco leaf of the present invention can select a magnetic material whose intrinsic Curie temperature is close to the actual working temperature, and there is no need to select a magnetic material with a high Curie temperature that exceeds the actual working temperature, which makes it easier and more accurate for the heating device to control the temperature.
  • the vacuum-assisted filtration method adopted by the present invention is a method of coating a magnetic material in the form of a suspension on the surface of a nanofiber using vacuum filtration; the vacuum-assisted filtration technology greatly improves the deposition rate of the nanomaterial, and the loss of the nanomaterial is smaller during the preparation process, and it is a very simple method for preparing multifunctional nanocomposite materials; the vacuum-assisted filtration technology is conducive to the nanofibers forming an entangled network through hydrogen bonds, thereby obtaining an ultra-rigid nanostructure with high thermal stability and high transparency, and further enhancing the high temperature resistance and mechanical strength of the magnetic aerosol forming matrix.
  • the advantages of the magnetic reconstituted tobacco leaves prepared by using ferromagnetic nanowires in the present invention are further described as follows: 1.
  • the heating performance of the magnetic reconstituted tobacco leaves can be easily adjusted by controlling the amount of magnetic nanowires or the driving voltage: for example, when the driving voltage is constant, the heating temperature of the magnetic reconstituted tobacco leaves with a high content of ferromagnetic nanowires (such as Fe-Ni NWs) increases due to the reduced resistance; due to the efficient Fe-Ni NWs embedded structure and the interconnected electromagnetic Fe-Ni NWs skeleton, by appropriately increasing the Fe-Ni NWs area fraction, high temperature can be obtained at a lower driving voltage, typically when the Fe-Ni NWs area fraction is 0.5g/ m2 , at a driving voltage of 3V, the temperature can rise to above 200°C within 10s; or when the Fe-Ni NWs area fraction is 1.0g/ m2 , at a driving voltage of 2V, the temperature can rise to above 250°C within 7s; the
  • the preparation method of the present invention the composite lamination technology of tobacco materials, nanofibers and magnetic nanomaterials, has the flexibility of practical production and can accurately control the properties of the final product.
  • the magnetic reconstituted tobacco leaves of the present invention have ideal tensile strength, flavor retention, magnetic controllability and cost-effectiveness.
  • the preparation method of the magnetic reconstituted tobacco leaf foil of the present invention can be based on the direction of the inductor excitation magnetic field passing through the aerosol forming matrix and the distribution of the magnetic flux lines, and through directional arrangement and papermaking, the prepared magnetic tobacco leaf base has a magnetic material orientation and distribution that is coordinated with the direction of the inductor excitation magnetic field and the distribution of the magnetic flux lines, so that the magnetic reconstituted tobacco leaf foil and even the aerosol forming matrix prepared from the magnetic tobacco leaf base can achieve the maximum magnetic field utilization efficiency and magnetic coupling strength when used in conjunction with a heating device;
  • the magnetic multi-layer tobacco leaf base can be designed with tobacco leaf bases having different layers of magnetic materials according to the subsequent process requirements and characteristics of the actual product, such as a sandwich-type tobacco leaf base, in which the inner and outer layers are tobacco fibers and the middle core layer is a magnetic nano-composite fiber.
  • the use of semi-wet coating material greatly reduces the water consumption, significantly reduces the drying process, and reduces the production energy consumption compared to the traditional papermaking method and thick pulp method of reconstituted tobacco leaf manufacturing process; because the foil dries faster, the finished reconstituted tobacco leaf foil is more resistant to fragrance
  • the ability to retain flavor substances and nicotine is stronger, less binder can be used, and the impact of unpleasant odors generated during the heating process of aerosol products on the taste of smoking is reduced.
  • the preparation method of the magnetic reconstituted tobacco leaf foil of the present invention comprises the steps of preparing a composite gel of nanofibers and magnetic nanowires by vacuum-assisted filtration, and the obtained magnetic coating material can be regarded as a magnetic gel.
  • the magnetic gel combines the characteristics of magnetism, high elasticity and flexibility, improves the film-forming property of the coating material, facilitates the uniform distribution of the magnetic material on the sheet base, and also improves the processing performance of the finished tobacco foil in processes such as rolling and gathering.
  • the preparation method of the magnetic reconstituted tobacco foil of the present invention obtains a fiber thin layer by dry process and then applies coating for multi-stage lamination, which not only retains the looseness of the reconstituted tobacco structure, but also the nanofibers, magnetic nanowires and polysaccharides contained in the magnetic coating liquid strengthen the hydrogen bond interaction with the fiber thin layer, enhance the film base shaping effect and mechanical properties, and reduce the powder loss, breakage and fracture phenomena in the downstream shredding or molding process.
  • Example 1 Preparation of magnetic reconstituted tobacco leaf foil, the steps are as follows:
  • the foil prepared above is further dried by a drying device to reduce the water content to 5-10 wt %.
  • the foil is wound onto a reel or cut into slices or shreds for use as a magnetic aerosol-forming matrix.
  • Example 2 Preparation of magnetic reconstituted tobacco particles, the steps are as follows:
  • the particles are wrapped or filled in the components of the aerosol product for use as a magnetic aerosol-forming matrix.
  • Example 3 Preparation of magnetic laminated reconstituted tobacco leaves, the steps are as follows:
  • the semi-wet powder is passed through several sets of high-pressure rollers with forming functions set at different heating temperatures to form a foil with a thickness of 0.10-0.30 mm;
  • the lamination temperature of the first stage is 70-100° C.
  • the lamination temperature of the second stage is 120-150° C.
  • the lamination temperature of the third stage is 160-200° C.;
  • the lamination pressure increases step by step, from 1 MPa of the first stage to 3 MPa of the second stage and then to 5 MPa of the third stage;
  • the foil is cut into sheets or shreds for use in an aerosol-forming matrix.
  • Example 4 Preparation of magnetic laminated reconstituted tobacco leaf foil, the steps are as follows:
  • the foil is cut into sheets or shreds for use in an aerosol-forming matrix.
  • Example 5 Preparation of magnetic reconstituted tobacco leaf foil, the steps are as follows:
  • the semi-wet powder is passed through several sets of high-pressure rollers with a forming function and coated with an adhesive layer and set at different heating temperatures to form a foil with a thickness of 0.10-0.30 mm;
  • the lamination temperature of the first stage is 70-100° C.
  • the lamination temperature of the second stage is 120-150° C.
  • the lamination temperature of the third stage is 160-200° C.;
  • the lamination pressure can be maintained constant at multiple stages, such as 5 MPa;
  • the foil is cut into sheets or shreds for use in an aerosol-forming matrix.
  • Example 6 Preparation of magnetic reconstituted tobacco leaf foil, the steps are as follows:
  • the tobacco pulp is defibrated by a defiberizer, water is added to the tobacco pulp to a concentration of 0.2-2 wt %, and the mixture is transferred to a stirring device for stirring; the nanofiber dispersion and the magnetic nanowire suspension are mixed and stirred, and a binder solution and a surfactant are added and mixed, and the mixture is stirred continuously to obtain a magnetic nanocomposite fiber pulp;
  • the binder solution comprises a solution of a mixed natural binder such as guar gum, xanthan gum or CMC (carboxymethyl cellulose) and others;
  • step (61) coating the wet coating material of step (4) on the magnetic reconstituted tobacco leaf base of step (51), Drying to a moisture content of 5-10 wt % to obtain a magnetic reconstituted tobacco leaf foil;
  • step (52) applying the semi-wet coating material of step (4) onto the tobacco sheet base of step (3);
  • step (52) performing three-stage lamination on the tobacco sheet base coated in step (52) to obtain a magnetic reconstituted tobacco leaf having a thickness of 0.10-0.30 mm, and drying the laminate to obtain a magnetic reconstituted tobacco leaf foil having a moisture content of 5-10 wt %;
  • the magnetic reconstituted tobacco leaf foil is rolled or cut into sheets or shredded for use as an aerosol-forming matrix.
  • the three-stage lamination in steps (51) and (62) uses high-pressure rollers with a molding function set at different heating temperatures, wherein the lamination temperature of the first stage is 70-100° C., the lamination temperature of the second stage is 120-150° C., and the lamination temperature of the third stage is 160-200° C.
  • the lamination pressure is maintained constant at multiple stages, such as 5 MPa; the pressure can also be increased step by step, such as from 1 MPa at the first stage to 3 MPa at the second stage and then to 5 MPa at the third stage.
  • Example 7 Preparation of magnetic reconstituted tobacco leaf foil, the steps are as follows:
  • the binder solution comprises a solution of a mixed natural binder such as guar gum, xanthan gum or CMC (carboxymethyl cellulose) and others;
  • the composite gel of the mixed nanofiber dispersion and magnetic nanowire suspension is added to a mixed slurry including but not limited to tobacco mixture powder, tobacco extract, glycerin, propylene glycol, and water, and a binder solution and a surfactant are added and mixed evenly to obtain a magnetic coating material, and the solid content is maintained at 50-80%;
  • the binder solution includes a mixed natural binder such as guar gum, xanthan gum or CMC (carboxymethyl cellulose) and other solutions;
  • the surfactant is polyvinyl pyrrolidone (PVP);
  • Example 2 (4) performing three-stage lamination as in Example 1 to obtain magnetic reconstituted tobacco leaf sheets having a thickness of 0.10-0.30 mm;
  • the foil prepared above is further dried by a drying device to reduce the moisture content to 5-10%, thereby obtaining a magnetic reconstituted tobacco leaf foil; and the foil is rolled, cut into sheets or shredded according to the final application requirements.
  • Example 8 Preparation of magnetic reconstituted tobacco leaf foil, the steps are as follows:
  • One or more of wood pulp fiber, hemp pulp fiber, and tobacco fiber are selected and crushed to obtain defibrated fibers; and the defibrated fibers are dry-formed by airflow to form a thin fiber layer.
  • the binder solution comprises a mixed natural binder such as guar gum, xanthan gum or CMC (carboxymethyl cellulose) and other solutions and a surfactant such as polyvinyl pyrrolidone (PVP); then adding plant polysaccharides, mixing to form a magnetic coating liquid;
  • the plant polysaccharides include but are not limited to starch, cellulose, polysaccharides, pectin, etc.;
  • Example 1 (4) preparing wet coating materials and semi-wet coating materials, as in Example 1;
  • step (1) coating the wet coating material of step (4) on the magnetic reconstituted tobacco leaf base of step (51), and drying to a moisture content of 5-10 wt % to obtain a magnetic reconstituted tobacco leaf foil;
  • step (52) The tobacco sheet base coated in step (52) is subjected to three-stage lamination in the same manner as in Example 1, and dried to a moisture content of 5-10 wt %, to obtain a magnetic reconstituted tobacco leaf foil; the foil is rolled, cut into sheets, or cut into shreds according to the final application requirements.

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Abstract

L'invention concerne du tabac reconstitué magnétique comprenant une feuille de tabac reconstitué magnétique et/ou des particules de tabac reconstitué magnétique. L'épaisseur de la feuille de tabac reconstitué magnétique est comprise entre 0,10 et 0,30 mm, et la taille de particule des particules de tabac reconstitué magnétique est comprise entre 0,5 et 2 mm ; la composition du tabac reconstitué magnétique contient un matériau de type fibre, un matériau de type tabac, des nanofibres et un matériau magnétique ; le matériau magnétique est un matériau qui peut être converti en chaleur après absorption d'un champ magnétique alternatif. De plus, l'invention concerne en outre un procédé de préparation et l'utilisation du tabac reconstitué magnétique.
PCT/CN2023/127121 2023-10-23 2023-10-27 Tabac reconstitué, son procédé de préparation et son utilisation Pending WO2025086252A1 (fr)

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Application Number Priority Date Filing Date Title
CN202311369678.2 2023-10-23
CN202311369678.2A CN117137174B (zh) 2023-10-23 2023-10-23 一种再造烟叶、其制备方法及用途

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WO2025086252A1 true WO2025086252A1 (fr) 2025-05-01

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CN117137172A (zh) * 2023-10-23 2023-12-01 云南中烟工业有限责任公司 一种磁性层压再造烟叶、其制备方法及用途
CN117137173B (zh) * 2023-10-23 2025-08-12 云南中烟工业有限责任公司 一种磁性再造烟叶箔、其制备方法及用途
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