WO2020148902A1

WO2020148902A1 - Method for producing laminated reconstituted tobacco sheet

Info

Publication number: WO2020148902A1
Application number: PCT/JP2019/001532
Authority: WO
Inventors: 宏海植松; 哲也眞鍋
Original assignee: 日本たばこ産業株式会社
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2020-07-23
Also published as: EP3912494A1; JPWO2020148902A1; EP3912494A4; JP7145238B2

Abstract

In the process for producing a reconstituted tobacco sheet comprising a tobacco raw material and an aerosol-forming agent, a technique is provided whereby it becomes possible to improve production suitability and mechanical strength and to secure the content of an aerosol formation solution per a unit area satisfactorily. A method for producing a laminated reconstituted tobacco sheet comprises a sheet feeding step of feeding a plurality of reconstituted tobacco sheets each containing an aerosol-forming agent and water and a pressure-bonding step of allowing the plurality of reconstituted tobacco sheets to pass between pressing rollers continuously while keeping the plurality of reconstituted tobacco sheets in a laminated form to pressure-bond the reconstituted tobacco sheets to each other, wherein at least one of the reconstituted tobacco sheets is a tobacco sheet which is produced by a paper-making technique in such a manner that a tobacco raw material is extracted with water to separate the tobacco raw material into a water-based tobacco extract and a water-insoluble tobacco residue, then pulp is blended to the insoluble tobacco residue, then a base sheet is made from the resultant blended product by a paper-making technique and then the water-based tobacco extract is added to the base sheet.

Description

Method for manufacturing laminated reconstituted tobacco sheet

The present invention relates to a method for manufacturing a laminated reconstituted tobacco sheet.

Non-tobacco rods formed by filling the inside of the paper with a tobacco filler containing tobacco raw materials (cigarette bones, tobacco lamina, tobacco cuts, tobacco fine powder, etc.) and aerosol generators (glycerin, propylene glycol, etc.) Combustion heating type smoking articles are known. This type of non-combustion heating type smoking article is a type of smoking article in which a tobacco filler is heated by a heating device such as an electric heater in a smoking device without being burned, and the aerosol generated in the tobacco filler is delivered to a smoker. Is.

Reconstituted tobacco raw material is known as a tobacco filler in non-combustion heating type smoking articles. The reconstituted tobacco raw material is made by mixing the tobacco raw material with binders, gelling agents, cross-linking agents, fragrances, hydrophilic fragrances, lipophilic fragrances, viscosity modifiers, moisturizers or reinforcing materials, etc. Examples thereof include reconstituted tobacco raw materials which have been molded and dried by a kneading method (papermaking), casting method, rolling method or extrusion method, for example, sheet tobacco, chopped sheet tobacco, tobacco granules and the like. Further, the tobacco filler may further contain a fragrance. The type of fragrance is not particularly limited.

Examples of the method for producing a reconstituted tobacco sheet include a method for producing a tobacco sheet by a papermaking (papermaking) process, a method for producing a tobacco sheet by a slurry (cast) process, and a method for producing a tobacco sheet by a rolling (roll) process. A method of manufacturing a tobacco sheet by an extrusion molding process is known.

Japanese Patent Publication No. 2015-517817 Japanese Patent Publication No. 2018-516536 Japanese Patent No. 4860634

▽ For reconstituted tobacco sheets used as tobacco fillers in non-combustion heating type smoking articles, it is desired to increase the amount of aerosol generation (delivery) to enhance the smoke feeling. Generally, it is known that a tobacco slurry sheet obtained by a slurry (cast) process can contain a large amount of an aerosol-forming agent such as glycerin, but mechanical strength that can withstand mechanical stress (tensile strength, breaking strength, etc.) Tends to be small. On the other hand, a tobacco paper sheet obtained by the papermaking process tends to have high mechanical strength due to the entanglement of pulp fibers, but the content of the aerosol-forming agent that can be contained (retained) tends to be smaller than that of the tobacco slurry sheet. .. Therefore, it is conceivable to increase the thickness of the tobacco sheet to increase the content of the aerosol-forming agent that can be contained in the tobacco sheet.

However, if the thickness of the base sheet that constitutes the tobacco sheet is simply increased as described above, the permeation rate of the aerosol-forming agent applied to the base sheet becomes slow, which is not suitable for practical processes.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is a manufacturing process of a reconstituted tobacco sheet containing a tobacco raw material and an aerosol generating agent, which has excellent manufacturing suitability and high mechanical strength, and It is an object of the present invention to provide a technique capable of sufficiently securing the content of the aerosol forming agent per unit area of the reconstituted tobacco sheet.

A method for manufacturing a laminated reconstituted tobacco sheet according to the present invention for solving the above-mentioned problems, a sheet supply step of supplying a plurality of reconstituted tobacco sheets containing an aerosol forming agent and moisture, and the plurality of reconstituted tobacco sheets. And a pressure-bonding step of pressure-bonding the reconstituted tobacco sheets to each other by continuously passing the pressure-bonded rollers in a state where the sheets are laminated, wherein at least one reconstituted tobacco sheet is obtained by extracting a tobacco raw material with water. It is a tobacco paper sheet obtained by separating the aqueous tobacco extract and the insoluble tobacco residue, and mixing the insoluble tobacco residue with pulp to make a base sheet, and then adding the aqueous tobacco extract to the base sheet. It is characterized by This makes it possible to provide a laminated reconstituted tobacco sheet which has excellent production suitability, high mechanical strength, and an excellent content of the aerosol forming agent per unit area.

Also, in the crimping step, the reconstituted tobacco sheets may be crimped together without adding an additional adhesive or binder.

Further, the plurality of reconstituted tobacco sheets may include a tobacco slurry sheet obtained by stretching a slurry containing a tobacco raw material, pulp, water and an aerosol forming agent in a sheet shape on a support, and drying the slurry. ..

Further, in the plurality of reconstituted tobacco sheets supplied in the sheet supply step, the content of the aerosol generating agent contained in the tobacco slurry sheet is compared to the content of the aerosol generating agent contained in the tobacco paper sheet. There may be many.

Further, the content of the aerosol forming agent contained in the tobacco sheet may be 12 to 25 wt %.

Further, the content of the aerosol forming agent contained in the tobacco slurry sheet may be 12 to 65 wt %.

Further, among the plurality of reconstituted tobacco sheets that pass through the pressure bonding roller in the pressure bonding step, the reconstituted tobacco sheets located at the uppermost layer and the lowermost layer may be formed by the tobacco paper sheet.

Further, among the plurality of reconstituted tobacco sheets that pass through the pressure-bonding roller in the pressure-bonding step, between the tobacco-making sheets located in the uppermost layer and the lowermost layer, a tobacco raw material, pulp, water, and an aerosol forming agent are used. A tobacco slurry sheet obtained by drawing a slurry containing the material into a sheet shape and drying it may be sandwiched. Further, a rolled tobacco sheet and/or a tobacco extruded sheet may be sandwiched between the tobacco paper sheets. The extruded sheet is made of, for example, a tobacco raw material containing a tobacco inner bone, tobacco lamina, cut tobacco, fine tobacco powder, etc., a binder (binder), an aerosol generator (glycerin, propylene glycol, etc.), and water in a stirring tank. It is a reconstituted tobacco sheet that can be produced by extruding from a die while applying pressure to a mixed raw material after mixing and drying.

Further, among the plurality of reconstituted tobacco sheets that pass through the pressure-bonding roller in the pressure-bonding step, between the lowermost layer and the uppermost layer of the tobacco sheet, a fragrance containing liquid, powdery or granular fragrance is contained. The sheets may be sandwiched.

Also, the water content of each reconstituted tobacco sheet supplied in the sheet supply step may be adjusted to be in the range of 12 to 25 wt %.

Also, in the crimping step, the reconstituted tobacco sheets may be crimped to each other with the product temperature of the reconstituted tobacco sheets kept at room temperature to 80°C.

In the pressure-bonding step, the pressure for pressing the reconstituted tobacco sheet by the pressure-bonding roller may be set to 200 to 1300 N/cm.

Further, the roller gap of the pressure bonding roller may be set to 20 to 80% of the total thickness of the plurality of reconstituted tobacco sheets that are passed through the pressure bonding roller in the pressure bonding step.

The means for solving the problems in the present invention can be adopted in combination as much as possible.

ADVANTAGE OF THE INVENTION According to this invention, in the manufacturing process of the reconstituted tobacco sheet containing the tobacco shreds and the aerosol forming agent, the manufacturing suitability is excellent and the mechanical strength is high, and the content of the aerosol forming agent per unit area can be sufficiently secured. Can provide technology.

FIG. 1 is a diagram showing a method for manufacturing a laminated reconstituted tobacco sheet according to the first embodiment. FIG. 2 is a diagram showing a layer structure of the laminated reconstituted tobacco sheet 1 according to the first embodiment. FIG. 3 is a diagram illustrating a method for manufacturing a tobacco sheet according to the first embodiment. FIG. 4 is a diagram illustrating a method for manufacturing a tobacco slurry sheet according to the first embodiment. 5: is a figure explaining the pressure bonding process in the manufacturing method of the laminated reconstruction tobacco sheet in Embodiment 1. FIG. FIG. 6 is a diagram illustrating a pressure bonding step in the method for manufacturing the laminated reconstituted tobacco sheet according to the first modification. FIG. 7: is a figure explaining the pressure bonding process in the manufacturing method of the laminated reconstruction tobacco sheet which concerns on the modification 2. FIG. FIG. 8: is a figure explaining the pressure bonding process in the manufacturing method of the laminated reconstruction tobacco sheet which concerns on the modification 3. FIG.

Now, an embodiment of a method for manufacturing a laminated reconstituted tobacco sheet according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, relative positions, and the like of the constituent elements described in the present embodiment are not intended to limit the technical scope of the invention to these unless otherwise specified. Absent.

<Embodiment 1>
FIG. 1 is a diagram showing a method for manufacturing a laminated reconstituted tobacco sheet according to the first embodiment. The method for producing a laminated reconstituted tobacco sheet according to the first embodiment includes a sheet supplying step (step S101) of supplying a plurality of reconstituted tobacco sheets containing an aerosol-generating agent and moisture, and a plurality of reconstituted tobacco sheets are laminated. And a pressure-bonding step (Step S102) of pressure-bonding the reconstituted tobacco sheets to each other by continuously passing the pressure-bonding rollers in the state, wherein at least one reconstituted tobacco sheet is a tobacco paper sheet. And

FIG. 2 is a diagram showing a layer structure of the laminated reconstituted tobacco sheet 1 obtained by the manufacturing method shown in FIG. The laminated reconstituted tobacco sheet 1 shown in FIG. 2 has a three-layer structure in which a first reconstituted tobacco sheet S1, a second reconstituted tobacco sheet S2, and a third reconstituted tobacco sheet S3 are laminated and each sheet is pressure-bonded. ing. The first reconstituted tobacco sheet S1 forming the uppermost layer of the laminated reconstituted tobacco sheet 1 and the third reconstituted tobacco sheet S3 forming the lowermost layer are formed by the tobacco paper sheet 11. The second reconstituted tobacco sheet S2 forming the intermediate layer is formed by the tobacco slurry sheet 12. The laminated reconstituted tobacco sheet 1 is used as a tobacco filler filled inside a wrapping paper of a tobacco rod of a non-combustion heating type smoking article. For example, the laminated reconstituted tobacco sheet 1 is cut into various forms such as finely chopped grains, fine particles, small pieces, and strips, and then filled into the inside of the wrapping paper as a tobacco filler to form a tobacco rod. Of course, not limited to the above-mentioned form, the laminated reconstituted tobacco sheet 1 may be folded into a gather shape and then filled inside the wrapping paper of the tobacco rod. Further, the laminated reconstituted tobacco sheet 1 may be subjected to processing for forming a plurality of grooves extending in the longitudinal direction at regular intervals on the surface thereof by laser processing or the like. Then, the laminated reconstituted tobacco sheet 1 rolled into a cylindrical shape so that the groove formed on the surface thereof coincides with the axially extending direction of the tobacco rod is provided with a multilayer structure inside the cigarette paper of the tobacco rod of the non-combustion heating type smoking article. It may be placed on top of each other.

Next, the tobacco sheet 11 and the slurry sheet 12 that compose the laminated reconstituted tobacco sheet 1 will be described. Tobacco paper sheet 11 is obtained by extracting a tobacco raw material with water to separate it into an aqueous tobacco extract and an insoluble tobacco residue, and adding pulp (cellulosic fiber) to the insoluble tobacco residue to make a base sheet. A reconstituted tobacco sheet obtained by adding the above aqueous extract. The slurry sheet 12 is a reconstituted tobacco sheet obtained by drawing a slurry raw material containing at least a tobacco raw material, pulp, water, and an aerosol forming agent into a sheet shape on a support and drying the sheet.

FIG. 3 is a diagram illustrating a method for manufacturing the tobacco paper sheet 11 according to the first embodiment. As shown in FIG. 3, first, in step S201, a tobacco raw material containing a tobacco inner bone, tobacco lamina, tobacco cut, tobacco fine powder, etc. is extracted with water (extraction step). In the extraction step, for example, 10 times the amount of water is added to the tobacco raw material, and the mixture is obtained by heating with stirring at a predetermined temperature for a predetermined time. Then, in step S202, the mixture obtained in the extraction step is squeezed using, for example, a screw press dehydrator to separate into an aqueous tobacco extract (liquid) and an insoluble tobacco residue (solid) (separation step). Next, in step S203, water and pulp (cellulose fibers) are added to the insoluble tobacco residue obtained in the separation step, and then the insoluble tobacco residue is beaten using a refiner to adjust the fiber length or fluff the fibers. It is made into fibers (beating step).

Next, in step S204, the insoluble tobacco residue and pulp that have been fiberized in the beating step are made into a sheet by a paper machine and dried to obtain a base sheet (paper making step). Then, in step S205, the concentrated solution of the aqueous tobacco extract obtained in the separation step and the additive solution containing the aerosol-forming agent such as glycerin or propylene glycol are added to the base sheet (perfuming step). .. In addition, in the perfuming step, the concentrated liquid of the aqueous tobacco extract added to the base sheet can be obtained, for example, by concentrating the aqueous tobacco extract with an evaporator. Next, in step S206, the perfumed base sheet obtained in the perfuming step is dried (drying step).

The tobacco paper sheet 11 is obtained by the above manufacturing method. The tobacco sheet 11 according to the present embodiment has the content of the aerosol-forming agent adjusted to 12 to 25 wt %. The water content of the tobacco sheet 11 is adjusted to be in the range of 12 to 25 wt %. Here, by setting the content of the aerosol forming agent in the tobacco paper sheet 11 to 12 wt% or more, the tobacco paper sheet 11 capable of supplying a necessary and sufficient amount of aerosol can be obtained. Further, by setting the content of the aerosol-generating agent in the tobacco sheet 11 to 25 wt% or less, it is possible to supply an excessive amount of the aerosol-generating agent to the base sheet beyond the retention capacity of the aerosol-generating agent in the base sheet. Can be suppressed. Thereby, for example, it is possible to prevent the surface of the base sheet from becoming sticky due to the aerosol-forming agent.

Next, a method for manufacturing the tobacco slurry sheet 12 that constitutes the laminated reconstituted tobacco sheet 1 will be described. FIG. 4 is a diagram illustrating a method for manufacturing the tobacco slurry sheet 12 according to the first embodiment. As shown in FIG. 4, first, in step S301, a tobacco raw material including a tobacco core, tobacco lamina, cut tobacco, fine tobacco powder, etc. is pulverized, and then a small amount of a binder (binder) and a reinforcing agent (pulp A defibrated material, etc.), a predetermined amount of an aerosol generator (glycerin, propylene glycol, etc.) and water are mixed, for example, in a stirring tank to obtain a slurry (suspension). Examples of the binder (binder) include guar gum, xanthan gum, CMC (methylol fiber) and the like.

Then, in step S302, the slurry obtained in the slurry acquisition step is cast (stretched) into a sheet shape, for example, on a steel belt (support) to obtain a slurry web (casting step). Next, in step S303, the sheet-shaped slurry web stretched into a sheet is dried (drying step). Through the above steps, the tobacco slurry sheet 12 is obtained. Here, in the tobacco slurry sheet 12 in the present embodiment, the content of the aerosol generating agent is adjusted to 12 to 65 wt %. Further, the water content of the tobacco slurry sheet 12 is adjusted to be in the range of 12 to 25 wt %. By setting the content of the aerosol-generating agent in the tobacco slurry sheet 12 to 12 wt% or more, the tobacco slurry sheet 12 capable of supplying a necessary and sufficient amount of aerosol can be obtained. Further, by setting the content of the aerosol forming agent of the tobacco slurry sheet 12 to 65 wt% or less, an excessive amount of the aerosol forming agent is supplied to the tobacco slurry sheet 12 beyond the retention capacity of the aerosol forming agent in the tobacco slurry sheet 12. Can be suppressed. As a result, it is possible to prevent the surface of the tobacco slurry sheet 12 from becoming sticky due to the aerosol-forming agent and causing a problem such as sticking during storage. It should be noted that the tobacco slurry sheet 12 has a higher ability to hold the aerosol-forming agent than the tobacco paper sheet 11.

Further, in the present embodiment, the tobacco slurry sheet 12 contains a relatively large amount of the aerosol forming agent as compared with the tobacco paper sheet 11. In addition, the tobacco slurry sheet 12 has a characteristic that pulp fibers are weakly entangled with each other and mechanical strength (tensile strength, breaking strength, etc.) is smaller than that of the tobacco paper sheet 11 due to the characteristics of the manufacturing process. On the other hand, the tobacco paper sheet 11 has a smaller amount of the aerosol-forming agent that can be contained as compared with the tobacco slurry sheet 12 as described above, but since the pulp fibers are strongly entangled with each other, mechanical strength ( It has the characteristics of high tensile strength, breaking strength, etc.).

The laminated reconstituted tobacco sheet 1 according to this embodiment has a laminated sheet structure in which the tobacco paper sheet 11 and the tobacco slurry sheet 12 having different characteristics are laminated as described above. Returning to FIG. 1, the method for manufacturing the laminated reconstituted tobacco sheet 1 will be described in detail. In the tobacco sheet supplying step (step S101 in FIG. 1 ), two tobacco papers manufactured by the method described in FIGS. A sheet 11 and one tobacco slurry sheet 12 are prepared. It should be noted that the tobacco paper sheet 11 produced by the production method described with reference to FIG. 3 and the tobacco slurry sheet 12 produced by the production method described with reference to FIG. good.

FIG. 5: is a figure explaining the pressure bonding process in the manufacturing method of the laminated reconstruction tobacco sheet 1 in Embodiment 1. In the pressure bonding step (step S102 in FIG. 1), the tobacco reconstituted tobacco sheet S1 (top layer) forming the first reconstituted tobacco sheet S1 (top layer) in the laminated reconstituted tobacco sheet 1 and the third reconstituted tobacco sheet S3 (bottom layer) The reconstituted tobacco sheets S1 to S3 are continuously pressure-bonded in such a manner that the tobacco slurry sheets 12 forming the second reconstituted tobacco sheet S2 (intermediate layer) are sandwiched between the tobacco paper sheets 11 forming the By passing through the roller 20, the reconstituted tobacco sheets S1 to S3 are pressed against each other. The pressure-bonding roller 20 has at least a pair of

roller members

21 and 22, and each of the reconstituted tobacco sheets S1 to S3 stacked between the pair of

roller members

21 and 22 is continuously passed, thereby A compressive force acts in the layer direction (thickness direction) on the constituted tobacco sheets S1 to S3. In the present embodiment, each reconstituted tobacco sheet is made by utilizing the hydrogen bond between the tobacco raw materials when the plurality of reconstituted tobacco sheets S1 to S3 are pressed in a stacked state by the pair of

roller members

21 and 22. Clamp S1 to S3 together. More specifically, the first reconstituted tobacco sheet S1 (tobacco) by hydrogen bonding between the tobacco raw materials in the first reconstituted tobacco sheet S1 (tobacco paper sheet 11) and the second reconstituted tobacco sheet S2 (tobacco slurry sheet 12). The papermaking sheet 11) and the second reconstituted tobacco sheet S2 (tobacco slurry sheet 12) are integrally pressure-bonded. The third reconstituted tobacco sheet S3 (tobacco paper sheet 11) is formed by hydrogen bonding between the tobacco raw materials in the third reconstituted tobacco sheet S3 (tobacco paper sheet 11) and the second reconstituted tobacco sheet S2 (tobacco slurry sheet 12). Then, the second reconstituted tobacco sheet S2 (tobacco slurry sheet 12) is integrally pressure-bonded. Here, a hydrogen bond is a lone electron such as nitrogen, oxygen, sulfur, fluorine, or π electron system in which a hydrogen atom, which is covalently bonded to an atom with a high electronegativity (negative atom), is located. It is a non-covalent, attractive interaction with a pair. The method for manufacturing the laminated reconstituted tobacco sheet 1 according to the present embodiment utilizes hydrogen bonds between the tobacco raw materials in the crimping step, so that each reconstituted tobacco sheet S1 can be formed without adding an additional adhesive or binder. It is possible to press-bond S3 to each other integrally.

In the pressure bonding step of the present embodiment, the pressure for pressing the reconstituted tobacco sheets S1 to S3 by the pressure bonding roller 20 (the pair of roller members 21 and 22) is set to 200 to 1300 N/cm. Here, if the pressing force of the pressure roller 20 is too high, the reconstituted tobacco sheets S1, S3 are likely to stick to the pressure roller 20 (a pair of roller members 21, 22), and if the pressing force is too low, the reconstituted tobacco sheets S1 to It is difficult to crimp S3 parts together. On the other hand, by adjusting the sandwiching pressure of the pressure roller 20 (a pair of roller members 21 and 22) within the range of 200 to 1300 N/cm, the reconstituted tobacco sheets S1 to S3 can be pressure-bonded more reliably. , A reconstituted tobacco sheet passing between the

roller members

21 and 22 of the pressure bonding roller 20 (in the present embodiment, the first reconstituted tobacco sheet S1 forming the uppermost layer of the laminated reconstituted tobacco sheet 1 or the first reconstituted tobacco sheet forming the lowermost layer). Adhesion of the 3 reconstituted tobacco sheet S3) to the

roller members

21 and 22 can be suitably suppressed.

Here, if the roller gap RC between the pressure-bonding rollers 20 (between the pair of roller members 21 and 22) is too narrow, the laminated reconstituted tobacco sheets S1 to S3 are smoothly bonded between the pair of

roller members

21 and 22 in the pressure-bonding step. It becomes difficult to feed the sheet into the sheet, and wrinkles are generated in the sheet due to the slip of the pair of

roller members

21 and 22, and the sheet is easily broken. On the other hand, if the roller gap RC is too wide, there is a possibility that the pressure of the reconstituted tobacco sheets S1 to S3 is weakened. Therefore, in the present embodiment, the roller gap is set to 20 to 80% of the total thickness of the plurality of reconstituted tobacco sheets S1 to S3 that pass through the pressure bonding roller 20 (between the pair of roller members 21 and 22) in the pressure bonding step. RC is set. By setting the roller gap RC within such a preferable range, the above-mentioned problems are less likely to occur. That is, in the crimping step, the reconstituted tobacco sheets S1 to S3 can be smoothly fed between the pair of

roller members

21 and 22, and the reconstituted tobacco sheets S1 to S3 are wrinkled or broken. It is possible to preferably suppress the occurrence of.

Further, when the reconstituted tobacco sheets S1 to S3 are pressure-bonded in the pressure-bonding step, if the temperature of the reconstituted tobacco sheets S1 to S3 is too high, the pair of

roller members

21, 22 in the pressure-bonding roller 20 are subjected to the first reconstituted tobacco. The sheet S1 or the third reconstituted tobacco sheet S3 is easily attached, and if the product temperature is too low, the reconstituted tobacco sheets S1 to S3 may be difficult to press-bond. Therefore, in the present embodiment, the reconstituted tobacco sheets S1 to S3 are pressure-bonded in the pressure-bonding step with the product temperature kept at room temperature to 80°. For example, in the pressure bonding step, the product temperature of each reconstituted tobacco sheet S1 to S3 may be adjusted within the range of 20 to 80°C. By doing so, the above-mentioned problems can be preferably suppressed. That is, in the crimping step, the reconstituted tobacco sheets S1 to S3 can be suitably crimped while suppressing the sticking of the reconstituted tobacco sheets S1 to S3 to the pair of

roller members

21 and 22.

Further, in the present embodiment, the moisture content of each reconstituted tobacco sheet S1 to S3 supplied in the sheet supply step is adjusted to be in the range of 12 to 25 wt %. The first reconstituted tobacco sheet S1 or the third reconstituted tobacco sheet S3 is a pair of roller members in the pressure-bonding roller 20 by setting the moisture contents of the respective reconstituted tobacco sheets S1 to S3 to be pressure-bonded to each other in the pressure-bonding step within the above range. The sheets can be suitably pressure-bonded to each other by making it easy to cause hydrogen bonding between the tobacco raw materials of the reconstituted tobacco sheets S1 to S3 while suppressing sticking to the

sheets

21 and 22. Further, if the moisture content of each of the reconstituted tobacco sheets S1 to S3 is too high, the tobacco raw material is likely to rot or deteriorate, and if the moisture content is too low, the rigidity of the sheet becomes high and the sheets may be easily crushed. Therefore, by defining the moisture content of each of the reconstituted tobacco sheets S1 to S3 within the range of 12 to 25 wt% as described above, it is possible to preferably suppress the occurrence of the above-mentioned problems.

As described above, in the manufacturing method according to the present embodiment, the reconstituted tobacco sheets S1 to S3 are pressure-bonded to each other to form the laminated reconstituted tobacco sheet 1. The basis weight can be increased. This makes it possible to easily increase the content of the aerosol-generating agent per unit area of the laminated reconstituted tobacco sheet 1. As a result, when providing a non-combustion heating type smoking article using the laminated reconstituted tobacco sheet 1 as a tobacco filler for a tobacco rod, a sufficient delivery amount of aerosol generation is ensured during smoking of the non-combustion heating type smoking article. The smoke amount can be increased.

Then, according to the method for manufacturing the laminated reconstituted tobacco sheet 1 in the present embodiment, as described above, at least one of the plurality of reconstituted tobacco sheets S1 to S3 to be crimped in the crimping step includes the tobacco papermaking sheet. Therefore, the mechanical strength (tensile strength, breaking strength, etc.) of the laminated reconstituted tobacco sheet 1 can be sufficiently secured.

Further, according to the method for manufacturing the laminated reconstituted tobacco sheet 1 in the present embodiment, it is possible to press-bond the plurality of reconstituted tobacco sheets to each other in the pressing step without adding an additional adhesive or binder. .. Here, when a plurality of reconstituted tobacco sheets are adhered to each other with a non-water-soluble adhesive, a large amount of non-water-soluble adhesive is used in order to suppress the occurrence of off-taste and off-flavor when smoking a non-combustion heating type smoking article. Difficult to use for. Further, when attempting to adhere a plurality of reconstituted tobacco sheets to each other with a water-soluble adhesive, the water content of the reconstituted tobacco sheets is increased, which may require a re-drying step. On the other hand, in the method for manufacturing the laminated reconstituted tobacco sheet 1 according to the present embodiment, a plurality of sheets of tobacco are produced by utilizing hydrogen bonding between tobacco raw materials without adding an additional adhesive or binder in the crimping step. Since the reconstituted tobacco sheets can be pressure-bonded to each other, it is possible to prevent the inconvenience described above from occurring.

Furthermore, according to the method for manufacturing a laminated reconstituted tobacco sheet 1 according to the present embodiment, even if the individual sheet thickness of the reconstituted tobacco sheet that is pressure-bonded in the pressure-bonding step is small, by increasing the number of layers laminated, The content of the aerosol generating agent per unit area of the constituted tobacco sheet 1 can be sufficiently secured. Therefore, at the time of manufacturing the tobacco paper sheet 11 forming the first reconstituted tobacco sheet S1 and the third reconstituted tobacco sheet S3, when the concentrated liquid of the aqueous tobacco extract or the aerosol forming agent is added to the base sheet in the perfume step. , For example, an appropriate thickness that can uniformly permeate the additive liquid containing the concentrated liquid of the aqueous tobacco extract in the thickness direction of the base sheet within the time required by the manufacturing conditions of the manufacturing apparatus (actual machine). You can set the thickness of the base sheet. As a result, the suitability for manufacturing the tobacco papermaking sheet 11 which is a constituent material of the laminated reconstituted tobacco sheet 1 becomes very excellent. Therefore, according to the manufacturing method of the present embodiment, it is possible to provide a laminated reconstituted tobacco sheet 1 which has excellent manufacturing suitability and high mechanical strength, and can sufficiently secure the content of the aerosol-generating agent per unit area. You can

Further, in the method for manufacturing the laminated reconstituted tobacco sheet 1 according to the present embodiment, at least one of the plurality of reconstituted tobacco sheets S1 to S3 to be crimped in the crimping step includes the tobacco slurry sheet 12. There is. Since the tobacco slurry sheet 12 is excellent in the ability to hold the aerosol forming agent, it is possible to contain and hold a larger amount of the aerosol forming agent. Therefore, the laminated reconstituted tobacco sheet 1 is formed by forming the laminated reconstituted tobacco sheet 1 as a laminated structure in which the tobacco slurry sheet 12 excellent in the content of the aerosol generating agent and the tobacco paper sheet 11 excellent in mechanical strength are combined. It is possible to further increase the content of the aerosol generating agent while ensuring the mechanical strength of 1.

Further, in the method for manufacturing the laminated reconstituted tobacco sheet 1 according to the present embodiment, among the plurality of reconstituted tobacco sheets S1 to S3 that pass between the pair of

roller members

21 and 22 of the pressure bonding roller 20 in the pressure bonding step, The first reconstituted tobacco sheet S1 located in the upper layer and the third reconstituted tobacco sheet S3 located in the lowermost layer are formed by the tobacco paper sheet 11, and the second reconstituted tobacco sheet S2 located in the intermediate layer is the tobacco slurry sheet 12 Formed by. The tobacco slurry sheet 12 has a relatively large content of the aerosol-forming agent as compared with the tobacco paper sheet 11, and has a property that the surface is more sticky than the tobacco paper sheet 11. On the other hand, according to the method for manufacturing the laminated reconstituted tobacco sheet 1 of the present embodiment, the outer layer of the laminated reconstituted tobacco sheet 1 is separated by the tobacco paper sheet 11 by sandwiching the tobacco slurry sheet 12 between the tobacco paper sheets 11. Since it is formed, stickiness on the surface of the laminated reconstituted tobacco sheet 1 can be suppressed. As a result, when the laminated reconstituted tobacco sheet 1 is manufactured, the reconstituted tobacco is compressed when the plurality of reconstituted tobacco sheets laminated in the pressure bonding step are spread by the pressure bonding roller 20 (a pair of roller members 21, 22). It is possible to more preferably suppress the sheet from sticking to the

roller members

21 and 22, the wrinkles, and the breakage of the reconstituted tobacco sheet. Further, the outer layer of the laminated reconstituted tobacco sheet 1 is formed of a tobacco paper sheet 11 having excellent mechanical strength, and a tobacco slurry sheet 12 having a relatively lower mechanical strength than the tobacco paper sheet 11 is laminated and reconstituted. By arranging the laminated reconstituted tobacco sheet 1 in the intermediate layer, it becomes easy to cut the laminated reconstituted tobacco sheet 1 into various forms such as finely chopped grains, fine grains, small pieces, strips, etc., or to wind it with a winding machine. More specifically, according to the laminated reconstituted tobacco sheet 1 having the above-mentioned laminated structure, unintentional fracture and crushing can be suppressed by increasing the mechanical strength, so that the cutting suitability is improved. Further, by forming the outer layer of the laminated reconstituted tobacco sheet 1 with the tobacco paper sheet 11, it is possible to prevent the surface of the laminated reconstituted tobacco sheet 1 from sticking, so that the slipperiness of the winding tube portion is improved and the smoothness is improved. Raw materials can be transported. As a result, it is possible to improve the hoisting suitability in the hoist for hoisting the laminated reconstituted tobacco sheet 1.

Here, the manufacturing method of the laminated reconstituted tobacco sheet 1 according to the present embodiment can employ various modified examples. For example, FIG. 6 is a diagram illustrating a pressure bonding step in the method for manufacturing the laminated reconstituted tobacco sheet 1 according to the first modification. The method for manufacturing the laminated reconstituted tobacco sheet 1 according to the present embodiment is a method in which at least one of a plurality of reconstituted tobacco sheets is a tobacco paper sheet, and the reconstituted tobacco sheets are continuously laminated with a pressure roller. It suffices to press the sheets together by passing through them, and the number of laminated reconstituted tobacco sheets is not particularly limited. Further, the number of the tobacco paper sheets included in the laminated reconstituted tobacco sheet 1 may be one. In the modified example 1 shown in FIG. 6, the laminated reconstituted tobacco sheet 1 has a two-layer structure in which a tobacco paper sheet 11 and a tobacco slurry sheet 12 are laminated one by one and pressure-bonded to each other. Also in the method for producing the laminated reconstituted tobacco sheet 1 according to Modification Example 1, the laminated slurry is reconstructed as a laminated structure in which a tobacco slurry sheet 12 having an excellent aerosol-generating agent content and a tobacco paper sheet 11 having excellent mechanical strength are combined. By forming the constituted tobacco sheet 1, it is possible to suitably increase the mechanical strength of the laminated reconstituted tobacco sheet 1 and the ability to contain the aerosol generating agent.

Moreover, the laminated reconstituted tobacco sheet 1 may be formed by pressing a plurality of tobacco paper sheets 11 together. FIG. 7: is a figure explaining the pressure bonding process in the manufacturing method of the laminated reconstruction tobacco sheet 1 which concerns on the modification 2. As shown in FIG. In Modified Example 2 shown in FIG. 7, the four tobacco paper sheets 11 are laminated to each other by passing through the pressure roller 20 (a pair of roller members 21 and 22). According to this modification, the laminated reconstituted tobacco sheet 1 having extremely excellent mechanical strength can be obtained. Of course, the number of laminated sheets of the tobacco sheet 11 may be adjusted according to the mechanical strength required for the laminated reconstituted tobacco sheet 1, the content of the aerosol forming agent, or the like.

Here, FIG. 8 is a diagram illustrating a crimping step in the method for manufacturing the laminated reconstituted tobacco sheet 1 according to Modification 3. The laminated reconstituted tobacco sheet 1 according to Modification 3 has a three-layer structure in which a flavor-containing sheet 13 is sandwiched between a tobacco paper sheet 11 and a tobacco slurry sheet 12. In the pressure-bonding step according to Modification 3, the tobacco paper sheet 11, the flavor-containing sheet 13, and the tobacco slurry sheet 12 are passed through the pressure-bonding roller 20 (a pair of roller members 21, 22), and each sheet is separated. Crim them together.

The perfume-containing sheet 13 is a sheet material in which the perfume is coated with a gel of a polysaccharide containing no gelling agent. Various fragrances can be used as the fragrance contained in the fragrance-containing sheet 13, and for example, menthol can be used. The fragrance contained in the fragrance-containing sheet 13 may be in a liquid form, a powder form, or a granular form.

In the flavor-containing sheet 13, as a coating agent for coating the flavor, the following polysaccharides, namely, carrageenan (also referred to as carrageenin and carrageenan) extracted from seaweeds of the red algae, agar, and seeds of trees are extracted. Galactomannan locust bean gum (carob gum), guar gum, tara gum, cassia gum, tamarind gum whose structure is xyloglucan extracted from the seed of resin, and the structure of xylan whose structure is xylan with arabinose side Cylium seed gum, which is an acidic polysaccharide with chains, xanthan gum and gellan gum (also referred to as dieteran gum), which are polysaccharides produced by microorganisms, konjac glucomannan extracted from konjac, starch (including various raw materials and solubility), etc. Can be mentioned. Among these, carrageenan, gellan gum, tamarind gum, psyllium seed gum, konjac glucomannan or agar can be used as a single component system. Alternatively, in the flavor-containing sheet 13, the polysaccharide used as the coating agent for coating the flavor may be a complex system in which two or more components selected from the above-mentioned group of polysaccharides are combined.

The method for preparing the flavor-containing sheet 13 is exemplified below. First, a polysaccharide (single component type or complex type) is dissolved in water while heating. To this aqueous solution, for example, a perfume and an emulsifier in a liquid state (or a molten state) at a heating temperature of 60 to 90° C. are added and kneaded and emulsified. Then, the perfume-containing sheet 13 can be produced by casting on a support in a state of maintaining the emulsified state and evaporating the water in which the polysaccharide is dissolved.

By applying the laminated reconstituted tobacco sheet 1 including the fragrance-containing sheet 13 produced as described above to a tobacco filler in a tobacco rod of a non-combustion heating type smoking article, a non-combustion heating type having a high fragrance content is provided. Tobacco rods for smoking articles can be made. Further, since the polysaccharide can be gelated only by heating, no gelling agent is needed. Therefore, the fragrance-containing sheet 13 does not contain a gelling agent such as a metal chloride, and has an advantage that an undesired chloride decomposition product is not generated in the aerosol when the non-combustion heating type smoking article is smoked.

In the third modification, the stacking order of the tobacco paper sheet 11, the flavor-containing sheet 13, and the tobacco slurry sheet 12 can be changed appropriately. Further, in the modified example 3, the type and the number of laminated sheets of the reconstituted tobacco sheet included in the laminated reconstituted tobacco sheet 1 can be appropriately changed.

The embodiments of the present invention have been described above, but the method for manufacturing the laminated reconstituted tobacco sheet of the present invention is not limited to these. For example, the laminated reconstituted tobacco sheet 1 may include a rolled tobacco sheet that is a reconstituted tobacco sheet manufactured by a rolling (rolling) process. Rolled tobacco sheets include, for example, binders, binders, reinforcing agents (pulp defibrated materials, etc.), aerosol generators (glycerin, propylene, etc.) for tobacco raw materials, including tobacco mid-bones, tobacco lamina, tobacco cuts, and tobacco fine powder. It is a reconstituted tobacco sheet that can be produced by mixing (glycol or the like), water and the like in a stirring tank, rolling the mixture into a sheet with, for example, a pair of rollers, and drying.

DESCRIPTION OF SYMBOLS 1... Laminated reconstituted tobacco sheet 11... Tobacco paper sheet 12... Tobacco slurry sheet 13... Perfume-containing sheet 20... Pressing roller S1... First reconstituted tobacco sheet S2... Second reconstituted tobacco sheet S3... Third reconstituted tobacco sheet

Claims

A sheet supply step of supplying a plurality of reconstituted tobacco sheets containing an aerosol generator and water,
A crimping step of crimping the reconstituted tobacco sheets by continuously passing a pressure roller in a state in which the plurality of reconstituted tobacco sheets are stacked,
Have
The at least one reconstituted tobacco sheet is obtained by extracting a tobacco raw material with water to separate it into an aqueous tobacco extract and an insoluble tobacco residue, blending the insoluble tobacco residue with pulp to form a base sheet, and then producing the base sheet. Tobacco paper sheet obtained by adding the aqueous tobacco extract to
Manufacturing method of laminated reconstituted tobacco sheet.
In the crimping step, crimping the reconstituted tobacco sheets together without adding an additional adhesive or binder,
The method for producing a laminated reconstituted tobacco sheet according to claim 1.
The plurality of reconstituted tobacco sheets, a tobacco raw material, a slurry containing a pulp, water, and an aerosol forming agent is drawn into a sheet shape on a support, and includes a tobacco slurry sheet obtained by drying,
The method for producing a laminated reconstituted tobacco sheet according to claim 1 or 2.
In the plurality of reconstituted tobacco sheets supplied in the sheet supply step, the content of the aerosol generator contained in the tobacco slurry sheet is higher than the content of the aerosol generator contained in the tobacco paper sheet. ,
The method for producing a laminated reconstituted tobacco sheet according to claim 3.
The content of the aerosol forming agent contained in the tobacco paper sheet is 12 to 25 wt %,
The method for producing a laminated reconstituted tobacco sheet according to claim 4.
The content of the aerosol generating agent contained in the tobacco slurry sheet is 12 to 65 wt %,
A method for producing a laminated reconstituted tobacco sheet according to claim 4.
Of the plurality of reconstituted tobacco sheets that pass through the pressure roller in the pressure bonding step, the reconstituted tobacco sheets located in the uppermost layer and the lowermost layer are formed by the tobacco paper sheet.
A method for producing a laminated reconstituted tobacco sheet according to claim 1.
Among the plurality of reconstituted tobacco sheets that pass through the pressure bonding roller in the pressure bonding step, between the tobacco paper sheets located in the uppermost layer and the lowermost layer, a slurry containing a tobacco raw material, pulp, water, and an aerosol forming agent. The sheet of tobacco is stretched on a support, and a tobacco slurry sheet obtained by drying is sandwiched,
The method for producing a laminated reconstituted tobacco sheet according to claim 7.
Among the plurality of reconstituted tobacco sheets that pass through the pressure-bonding roller in the pressure-bonding step, between the lowermost layer and the uppermost layer of the tobacco sheet, a fragrance-containing sheet containing a liquid, powdery or granular fragrance. Sandwiched,
A method for manufacturing the laminated reconstituted tobacco sheet according to claim 7.
The moisture content of each reconstituted tobacco sheet supplied in the sheet supply step is adjusted to be in the range of 12 to 25 wt %,
The method for producing a laminated reconstituted tobacco sheet according to claim 1.
In the crimping step, the reconstituted tobacco sheets are crimped to each other in a state where the temperature of the reconstituted tobacco sheets is from room temperature to 80° C.
A method for manufacturing a laminated reconstituted tobacco sheet according to claim 1.
In the pressure-bonding step, the pressure for pressing the reconstituted tobacco sheet by the pressure-bonding roller is set to 200 to 1300 N/cm.
The method for producing a laminated reconstituted tobacco sheet according to claim 1.
The roller gap of the pressure-bonding roller is set to 20 to 80% of the total thickness of the plurality of reconstituted tobacco sheets that are passed through the pressure-bonding roller in the pressure-bonding step.
A method for manufacturing the laminated reconstituted tobacco sheet according to claim 1.