Material for smoking article containing tobacco extraction residue, method for producing said material, and smoking article containing said material

Abstract

The present invention provides a material for a smoking article containing a tobacco extraction residue obtained by extracting a tobacco raw material. The material for a smoking article preferably contains a fibrous reinforcing material, a binder, or a filler.

Description

Material for smoking articles containing tobacco extract residue, method for producing the same, and smoking articles containing the same

[0001] The present invention relates to a material for a smoking article containing tobacco extract residue, a method for producing the same, and a smoking article containing the same.

[0002] A known method for producing tobacco sheets is the so-called papermaking method, which includes the steps of subjecting tobacco raw materials to water extraction to separate the extraction water and a residue, papermaking the residue into a sheet, and pouring the extraction water back onto the sheet (see, for example, Patent Document 1).

[0003] JP 2010-88381 A

[0004] A variety of materials are used in smoking articles, but there is a demand for a shift to materials that do not place a burden on the environment. In view of this situation, an object of the present invention is to provide a material for smoking articles that places a low burden on the environment.

[0005] As mentioned above, the residue obtained by subjecting tobacco raw materials to aqueous extraction has been used as a base material for tobacco papermaking sheets. The inventors have discovered that the above-mentioned problem can be solved by using the residue as a material for smoking articles. That is, the above-mentioned problem is solved by the following invention. Aspect 1: A material for smoking articles comprising tobacco extraction residue obtained by extracting tobacco raw materials. Aspect 2: The material according to Aspect 1, comprising a fibrous reinforcing material, a binder, or a filler. Aspect 3: The material according to Aspect 1 or 2, wherein the nicotine content of the extraction residue is 1% by weight or less of the nicotine content of the tobacco raw materials. Aspect 4: The material according to any one of Aspects 1 to 3, wherein the extraction residue has been subjected to a cooking treatment. Aspect 5: The material according to any one of Aspects 2 to 4, wherein the binder comprises starch. Aspect 6: A wrapper, paper tube, filter, or pulp molded cup formed from the material according to any one of Aspects 1 to 4. Aspect 7 A method for producing the material according to any one of Aspects 1 to 6, comprising the steps of subjecting a tobacco raw material to extraction with a medium to obtain a tobacco extract residue, and a molding step of molding the tobacco extract residue. Aspect 8 The manufacturing method according to Aspect 7, wherein the medium is water or a medium containing water. Aspect 9 The manufacturing method according to Aspect 7 or 8, wherein the molding step includes papermaking or pulp molding. Aspect 10 A smoking article comprising the material according to any one of Aspects 1 to 5. Aspect 11 The smoking article according to Aspect 10, further comprising an extract obtained by extracting a tobacco raw material.

[0006] The present invention can provide a material for a smoking article that has a low environmental impact.

[0007] Diagram explaining pulp molding Diagram showing an example of a smoking article Diagram explaining caps and cups Diagram showing the relationship between the amount of carbonized components and the TPM reduction rate

[0008] In this disclosure, "X to Y" includes the endpoints X and Y. Unless otherwise specified, weights are dry weights.

[0009] 1. Tobacco Extract Residue Tobacco extract residue is a solid obtained by subjecting tobacco raw materials to extraction. Extraction methods can be carried out as known in the art, and examples include the following: 1) a method in which tobacco raw materials are subjected to extraction using a medium to obtain a tobacco extract and a tobacco extract residue; 2) a method in which a medium is added to a tobacco raw material and heated, and the generated vapor is collected to obtain a tobacco extract and a tobacco extract residue; and 3) a method in which a medium that has been vaporized by heating is passed through a tobacco raw material and the vapor after passing is collected to obtain a tobacco extract and a tobacco extract residue. Examples of the medium include water, a hydrophilic organic solvent such as alcohol, or a combination thereof, and the medium is preferably water or contains water.

[0010] In method 1), it is preferable to use water as the medium from the viewpoint of workability, etc. Furthermore, in methods 2) and 3), it is preferable to use an alcohol such as glycerin, propylene glycol, triacetin, 1,3-butanediol, or ethanol as the medium from the viewpoint of work efficiency. Acid or alkali can also be used for extraction as needed. The liquid obtained by extraction, containing the tobacco extract and the medium, is called a tobacco extract.

[0011] As the tobacco raw material, for example, raw materials of the Nicotiana genus such as Nicotiana tabacum and Nicotiana rustica can be used. As Nicotiana tabacum, for example, varieties such as Burley or flue-cured varieties can be used. In addition to these, Oriental varieties and native Burley varieties of the Nicotiana genus may also be used.

[0012] The tobacco raw material may be shredded or powdered tobacco raw material (hereinafter also referred to as "raw material pieces"). In such cases, the particle size of the raw material pieces is preferably 0.5 to 1.18 mm. Such raw material pieces can be obtained, for example, by sieving in accordance with JIS Z 8815 using a stainless steel sieve in accordance with JIS Z 8801. For example, 1) using a stainless steel sieve with 1.18 mm meshes, the raw material pieces are sieved by a dry mechanical shaking method for 20 minutes to obtain raw material pieces that pass through the stainless steel sieve with 1.18 mm meshes. 2) Subsequently, using a stainless steel sieve with 0.50 mm meshes, the raw material pieces are sieved by a dry mechanical shaking method for 20 minutes to remove the raw material pieces that pass through the stainless steel sieve with 0.50 mm meshes. In this way, raw material pieces can be prepared that pass through a stainless steel sieve (mesh opening = 1.18 mm) that defines the upper limit, but do not pass through a stainless steel sieve (mesh opening = 0.50 mm) that defines the lower limit.

[0013] In one embodiment, a tobacco raw material is treated with an alkali. This treatment generates flavor components, which are then collected to prepare a tobacco extract and a tobacco extract residue. In this process, the flavor components can be extracted as gas from the alkali-treated tobacco raw material, and the gas can be introduced into water to convert the flavor components into a liquid.

[0014] The alkaline substance is preferably an alkaline liquid such as an aqueous potassium carbonate solution. In this case, the alkaline substance is supplied until the pH of the tobacco raw material falls within a specific range. The pH is preferably 8.0 or higher, more preferably 8.9 to 9.7. The pH of the tobacco raw material is the pH of water when the tobacco raw material is mixed with 10 times the amount of water.

[0015] The moisture content of the tobacco raw material subjected to extraction is not limited, but from the viewpoint of efficiently extracting flavor components, the moisture content is preferably approximately 5 to 30% by weight. The moisture content of the tobacco raw material is measured by a known method; for example, a 1-g sample is taken, heated at 105°C, and the weight loss when heated until the weight change rate is 1 mg / min or less is taken as the moisture content. For example, a halogen heating moisture meter (such as the MB45 manufactured by Ohaus Co., Ltd.) can be used for this measurement.

[0016] The tobacco extract preferably contains a large amount of nicotine. From this perspective, the amount of nicotine in the extraction residue is preferably 1% by weight or less, and more preferably 0.5% by weight or less, of the amount of nicotine in the tobacco raw material. In one embodiment, the amount of nicotine in the extraction residue is 0 to 0.1% by weight (based on the extraction residue).

[0017] The tobacco extract residue is preferably subjected to a cooking treatment. Cooking is a treatment that primarily removes lignin. Cooking is carried out in a known manner, for example by adding a cooking agent such as sodium sulfide to the tobacco extract residue, and then heating and pressurizing it.

[0018] 2. Smoking Article Materials Tobacco extract residue is useful as a material that can be used in smoking articles, i.e., as a smoking article material. Typically, smoking article materials contain tobacco extract residue and other components. Smoking article materials may be in various forms, and the components used vary depending on the form; however, representative components are described below. Smoking article materials preferably do not contain a tobacco paper sheet substrate. In one embodiment, the nicotine content of the smoking article material is 0 to 0.1% by weight (based on the material).

[0019] (1) Fibrous Reinforcement Material While not limited to specific materials, non-wood fibers are preferred. Non-wood fibers are fibers not derived from wood, and may be tobacco fibers or fibers other than tobacco fibers. From the perspective of imparting strength, dietary fibers are preferred as non-wood fibers. Dietary fibers are dietary components that are not digested by human digestive enzymes, and are more preferably insoluble dietary fibers that do not dissolve in water. Dietary fibers may be porous, i.e., spongy. From the perspective of availability, the fiber is preferably citrus fiber. Citrus fiber is a fiber derived primarily from the albedo of citrus fruits. Dietary fiber may also be short fibers or columnar particles with a small aspect ratio. Citrus fiber is particularly preferred because it can impart strength to smoking article materials with a small amount. In one embodiment, the content of the fibrous reinforcing material in the smoking article material is 10 to 30 wt %.

[0020] (2) Binder The binder is not limited, but examples thereof include starch, carboxyalkyl cellulose, guar gum, etc. Among these, starch is preferred as the binder from the viewpoint of availability, etc. In one embodiment, the binder content in the material for a smoking article is 5 to 30 wt %.

[0021] (3) Filler: Fillers are inorganic materials used in paper, such as calcium carbonate, titanium dioxide, and kaolin. Calcium carbonate is preferred from the viewpoint of enhancing flavor and whiteness. Therefore, fillers are useful when forming nonwoven fabrics such as paper into smoking article materials. In one embodiment, the content of the filler in the smoking article material is 10% by weight or more and less than 60% by weight.

[0022] (4) Form As described above, the material for a smoking article may be in various forms. Preferably, the material for a smoking article is produced through a process of subjecting a tobacco raw material to extraction with a medium to obtain a tobacco extract residue, and a molding process of molding the tobacco extract residue. The medium is as described above.

[0023] Smoking article materials are broadly divided into combustion-type smoking articles, which are used by combustion, and non-combustion-type smoking articles, which are used by heating a flavor source without combustion. Non-combustion-type smoking articles are further classified into non-combustion-type indirectly heated smoking articles, which heat a liquid with a heater or the like to generate vapor, which is then passed through the flavor source to indirectly heat the flavor source, and non-combustion-type directly heated smoking articles, which heat the flavor source directly. In one embodiment, the smoking article material is formed by pulp molding, which is particularly useful as a cup (container) for holding a flavor source in a non-combustion-type indirectly heated smoking article. In another embodiment, the smoking article material is in the form of a nonwoven fabric, which is suitable for use as a wrapper for a combustion-type smoking article or a non-combustion-type directly heated smoking article. These are described below.

[0024] 1) Pulp Molded Product Pulp molding refers to molding a pulp slurry. The molded product obtained by this molding is called a pulp molded product. Since the tobacco extract residue of this embodiment contains tobacco-derived fibers, a molded product obtained by molding a slurry containing tobacco extract residue is called a pulp molded product. The slurry for pulp molding preferably contains a medium, the tobacco extract residue, the fibrous reinforcing material, and the binder. The blending amounts of each component are as described above. The medium is preferably water. The solids concentration in the slurry is not limited, but is preferably 0.5 to 10% by weight, more preferably 1 to 5% by weight. The slurry for pulp molding may also contain a water resistance improver, as described below, and known water repellents, sizing agents, etc., as needed.

[0025] Molding can be performed as known in the art. For example, the slurry can be filled into a female mold, and then compressed and dehydrated using a male mold to form the desired shape. FIG. 1 is a schematic diagram showing this embodiment. In the figure, 1 denotes the slurry, 2 denotes the male mold, 3 denotes the female mold, 4 denotes a through-hole, and 10 denotes a pulp-molded product. Specifically, the slurry is filled into a female mold 3, and then pressed by the male mold 2 to be removed. The female mold 3 may be formed of a mesh. The pulp-molded product 10 obtained in this manner may be subjected to steps such as heating or coating with a coating agent.

[0026] Alternatively, the pulp molding may be pulp injection molding, which comprises the following steps: 1) mixing the tobacco extract residue with a binder (preferably starch) and then producing pellets; 2) mixing the pellets with water to form a pulp slurry, which is then injected into a mold; and 3) simultaneously with the injection molding, applying heat to the pulp slurry to remove moisture within the mold and dry it.

[0027] As mentioned above, the pulp-molded article 10 is preferably in the shape of a cup (container). The cup is useful as a material for retaining a flavor source in a non-combustion indirectly heated smoking article or a non-combustion directly heated smoking article. The pulp-molded cup will be described below.

[0028] [Usage of the Cup] Figure 2 shows an example of a smoking article equipped with the cup. In the figure, 5 denotes a non-combustion heating smoking article, 10 denotes a pulp molded cup, 11 denotes a chamber that houses the cup, 12 denotes a coil, 14 denotes a control device, 16 denotes a power source, and 18 denotes a cap, which serves as the mouth end. Figure 3 is a diagram further illustrating the cap 18 and the pulp molded cup 10. In the figure, 182 denotes an opening, 184 denotes a tube, 186 denotes a mouth hole, 102 denotes a seal, and 104 denotes a contained item. The tip of the tube 184 has a shape that allows it to penetrate the seal 102. The cap 18 can be joined to the pulp molded cup 10, and they are integrated as shown in the right figure. When the non-combustion heating smoking article 5 is in use, air taken in through the opening 182 passes through the contained item 104 and flows to the mouth hole 186 via the central tube 184. In the embodiment shown in Figure 2, a susceptor is placed in the cup, and the contained item 104 is heated by electromagnetic induction heating. Alternatively, the coil 12 can be replaced by a heater.

[0029] [Contents of Cup] The contents 104 contained in the pulp molded cup 10 can be a molded body containing a tobacco extract, an aerosol source, and the like. The molded body may be in the form of granules or a sheet. The pulp molded cup 10 can also contain a carrier supporting the tobacco extract or the aerosol source. This carrier may be the tobacco extract residue. For example, the carrier may be a paper filter formed from the tobacco extract residue. Furthermore, as described above, a susceptor can also be contained in the pulp molded cup 10. The susceptor may be plate-shaped or cylindrical. The cylindrical susceptor may be placed in the cup by insert molding when the cup is manufactured using a pulp mold. The pulp molded cup 10 may also contain tobacco material. In this case, an aerosol source reservoir may be provided upstream of the pulp molded cup 10, and the aerosol generated by heating the aerosol source can be introduced into the pulp molded cup 10. That is, the pulp molded cup 10 can also be used in a non-combustion, indirectly heated smoking article.

[0030] [Cup Configuration] Before use, the pulp molded cup 10 is sealed with a seal 102. As described above, during use, holes are provided in the seal 102 to form air flow paths.

[0031] In another embodiment, an opening for taking in air is provided in the bottom or side of the pulp molded cup 10. In this embodiment, the tube 184 does not need to be provided in the cap 18.

[0032] [Characteristics of the Cup] The thickness of the pulp molded cup 10 is preferably 0.2 to 1.0 mm from the viewpoint of heating efficiency and strength. From the same viewpoint, the specific gravity of the cup 10 is preferably 0.8 to 1.5 cm ３ is.

[0033] 2) Nonwoven Fabric As mentioned above, the smoking article material can be in the form of a nonwoven fabric, which is suitable for wrappers, paper tubes, filters (e.g., paper filters) in combustion-type smoking articles or non-combustion-type directly heated smoking articles. The nonwoven fabric can be obtained by papermaking the smoking article material. Papermaking can be carried out as known in the art. For example, the slurry can be spread on a substrate such as a wire part and dehydrated and dried to obtain a nonwoven fabric.

[0034] The wrapper preferably contains a filler. The filler content is preferably at least 10% but less than 60% by weight, more preferably 15 to 45% by weight, based on the weight of the wrapper. Preferred embodiments include a basis weight of 25 to 45 gsm and a filler content of 15 to 45% by weight, a basis weight of 25 to 35 gsm and a filler content of 15 to 45% by weight, or a basis weight of 35 to 45 gsm and a filler content of 25 to 45% by weight.

[0035] The wrapper may contain other additives. For example, a water resistance improver may be added as an additive. The water resistance improver includes a wet strength agent (WS agent) and a sizing agent. Examples of wet strength agents include urea formaldehyde resin, melamine formaldehyde resin, and polyamide epichlorohydrin (PAE). Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

[0036] The wrapper may also be coated. At least one surface may be coated. The coating agent is not limited to, but is preferably a coating agent that can form a film on the surface of the paper and reduce liquid permeability. Examples of coating agents include alginic acid and its salts (e.g., sodium salts); polysaccharides such as pectin; cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose; and starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch; and ester derivatives such as starch acetate, starch phosphate, and starch octenyl succinate).

[0037] The nonwoven fabric is also useful as a paper filter. For example, a paper filter can be produced by filling a wrapper with the nonwoven fabric. In this case, the ridges formed by folding the nonwoven fabric are approximately parallel to the longitudinal direction of the filter. The nonwoven fabric may be subjected to a crimping treatment.

[0038] (5) Carbonized Components It is preferable that smoking article materials containing tobacco extract residues do not contain excessive carbonized components. A carbonized component is a component that does not become a carbonized product at temperatures below 250°C, but becomes a carbonized product when maintained at 250°C for a predetermined period of time. When heated during the production or use of the smoking article material, the carbonized component can burn and adhere to the manufacturing equipment or the smoking article. This can result in a deterioration of the aroma and flavor. From this perspective, the amount of carbonized components is preferably 30 mg or less, more preferably 10 mg or less, and even more preferably 6 mg or less per gram of smoking article material.

[0039] The amount of carbonized components contained in a smoking article material can be determined, for example, by the following measurement method. An immersion liquid (47.5% by weight propylene glycol, 47.5% by weight glycerin, 5% by weight water) is prepared in an amount five times the weight of the smoking article material. The smoking article material is immersed in the immersion liquid and allowed to stand at 60°C for one hour. The smoking article material and the immersion liquid are then separated, and the immersion liquid is heated to 180°C to volatilize the solvent (liquid component) contained in the immersion liquid, thereby obtaining a "non-volatile residue." This residue is then heated to 250°C to carbonize it, obtaining carbonized components, and the weight of the carbonized components is measured. The amount of carbonized components measured in this manner is the amount of carbonized components contained in the smoking article material.

[0040] By setting the amount of carbonized components within the above range, adhesion of components to the manufacturing equipment and heating equipment during pulp mold manufacturing and heating can be suppressed. To reduce the amount of carbonized components, it is preferable to wash the extraction residue with, for example, water. This allows for the production of an extraction residue with fewer carbonized components.

[0041] The carbonized components of the smoking article material also affect the amount of TPM produced during smoking. Figure 4 shows the results of measuring the TPM reduction rate relative to the amount of carbonized components contained in 1 g of aerosol liquid. The horizontal axis of Figure 4 shows the amount of carbonized components contained in 1 g of aerosol liquid, and the vertical axis shows the TPM reduction rate (R ＴＰＭ ) (%).

[0042] The TPM reduction rate (RTPM: %) in Figure 4 was measured using the following method. First, several smoking article materials (Sample SA1 to Sample SA5) were prepared, each containing different amounts of carbonized components per gram of aerosol liquid. These five samples were prepared using the following process.

[0043] (Step 1) To a tobacco raw material consisting of tobacco leaves, 20% by dry weight of potassium carbonate was added, followed by a heat distillation treatment. The distillation residue after this heat distillation treatment was immersed for 10 minutes in water in an amount 15 times the weight of the tobacco raw material before the heat distillation treatment, dehydrated in a dehydrator, and then dried in a dryer to obtain a tobacco residue.

[0044] (Step 2) Next, a portion of the tobacco residue obtained in step 1 was washed with water to prepare a tobacco residue containing a small amount of carbonized material.

[0045] (Step 3) Next, 25 g of immersion liquid (propylene glycol 47.5 wt %, glycerin 47.5 wt %, water 5 wt %) was added to 5 g of the tobacco residue obtained in step 2, and the temperature of the immersion liquid was increased to 60° C. The amount of carbonized components eluted into the immersion liquid was varied by varying the immersion time (i.e., the immersion time in the immersion liquid).

[0046] Next, the samples prepared in the above steps were subjected to automatic smoking using an automatic smoking machine (Borgwaldt's "Analytical Vaping Machine") under the "CRM (Coresta Recommended Method) 81 smoking conditions." The CRM 81 smoking conditions involve inhaling 55 cc of aerosol over 3 seconds, multiple times every 30 seconds.

[0047] Next, the amount of total particulate matter trapped in the Cambridge filter of the automatic smoking machine was measured. Based on this measured amount of total particulate matter, the TPM reduction rate (R ＴＰＭ ) was calculated. By the above method, the TPM reduction rate (R ＴＰＭ ) was measured.

[0048] RＴＰＭ (%)=(1-TPM(201puff~250puff) / TPM(1puff~50puff))×100...(1)

[0049] TPM (Total Particle Molecule) represents the total particulate matter trapped by the Cambridge filter of an automatic smoking machine. "TPM (1 puff to 50 puffs)" in formula (1) represents the amount of total particulate matter trapped by the Cambridge filter from the first puff to the 50th puff of the automatic smoking machine. "TPM (201 puff to 250 puffs)" in formula (1) represents the amount of total particulate matter trapped by the Cambridge filter from the 201st puff to the 250th puff of the automatic smoking machine.

[0050] That is, the TPM reduction rate (R ＴＰＭ ) is calculated by subtracting the amount of total particulate matter collected by the Cambridge filter between the 201st and 250th puffs of an automatic smoking machine divided by the amount of total particulate matter collected by the Cambridge filter between the 1st and 50th puffs of an automatic smoking machine from 1, and multiplying the result by 100.

[0051] As can be seen from Fig. 4, the amount of carbonized components contained in 1 g of aerosol liquid is proportional to the TPM reduction rate. As can be seen from Fig. 4, particularly from Samples SA1 to SA4, when the amount of carbonized components contained in 1 g of aerosol liquid is 6 mg or less, the TPM reduction rate can be suppressed to 20% or less.

[0052] 3. Smoking Articles The smoking article material is useful for smoking articles. Smoking articles include combustion-type smoking articles and non-combustion-heat-type smoking articles, and the smoking article material can be used for either. For example, the smoking article can include a wrapper or paper filter made from the smoking article material. In this case, a tobacco extract can be added as a flavor source. It is more preferable if the tobacco extract is derived from the same raw material as the tobacco extract residue contained in the smoking article material, as this allows for effective use of the tobacco raw material.

[0053] Furthermore, among non-combustion heated smoking articles, there are articles (non-combustion indirectly heated smoking articles) that heat an aerosol source disposed separately from the flavor source to generate vapor or aerosol, which is then passed through the flavor source to carry the flavor. The pulp molded cup is useful as a cup for holding the flavor source. In this case, a tobacco extract can be added to the flavor source. It is more preferable if the tobacco extract is derived from the same raw material as the tobacco extract residue contained in the smoking article material, as this allows for effective use of the tobacco raw material.

[0054] Embodiments are described below. Aspect 1: A material for smoking articles, comprising a tobacco extraction residue obtained by extracting a tobacco raw material. Aspect 2: The material according to Aspect 1, comprising a fibrous reinforcing material, a binder, or a filler. Aspect 3: The material according to Aspect 1 or 2, wherein the nicotine content of the extraction residue is 1% by weight or less of the nicotine content of the tobacco raw material. Aspect 4: The material according to any one of Aspects 1 to 3, wherein the extraction residue has been subjected to a cooking treatment. Aspect 5: The material according to any one of Aspects 2 to 4, wherein the binder comprises starch. Aspect 6: A wrapper, paper tube, filter, or pulp-molded cup formed from the material according to any one of Aspects 1 to 4. Aspect 7: A method for producing the material according to any one of Aspects 1 to 6, comprising: a step of extracting a tobacco raw material with a medium to obtain a tobacco extraction residue; and a molding step of molding the tobacco extraction residue. Aspect 8: The manufacturing method according to Aspect 7, wherein the medium is water or a medium containing water. Aspect 9: The manufacturing method according to Aspect 7 or 8, wherein the molding step comprises papermaking or pulp molding. Aspect 10: A smoking article comprising the material according to any one of Aspects 1 to 5. Aspect 11: The smoking article according to Aspect 10, further comprising an extract obtained by extracting a tobacco raw material.

[0055] REFERENCE SIGNS LIST 1 Slurry 2 Male mold 3 Female mold 4 Through hole 5 Non-combustion heating smoking article 10 Pulp molded product, pulp molded cup 102 Seal 104 Content 11 Chamber 12 Coil 14 Control device 16 Power source 18 Cap 182 Opening 184 Tube 186 Mouth hole

Claims

1. A material for smoking articles containing tobacco extract residue obtained by extracting tobacco raw materials.

2. The material of claim 1, further comprising a fibrous reinforcement, binder, or filler.

3. The material described in claim 1 or 2, wherein the nicotine content of the extraction residue is 1% by weight or less of the nicotine content of the tobacco raw material.

4. The material according to any one of claims 1 to 3, wherein the extraction residue has been digested.

5. The material of any one of claims 2 to 4, wherein the binder comprises starch.

6. A wrapper, paper tube, filter, or pulp molded cup formed from the material of any one of claims 1 to 4.

7. A method for producing the material described in any one of claims 1 to 6, comprising: a step of subjecting tobacco raw material to extraction with a medium to obtain a tobacco extraction residue; and a molding step of molding the tobacco extraction residue.

8. The method according to claim 7, wherein the medium is water or a medium containing water.

9. The method of claim 7 or 8, wherein the forming step includes papermaking or pulp molding.

10. A smoking article comprising the material of any one of claims 1 to 5.

11. The smoking article according to claim 10, further comprising an extract obtained by extracting a tobacco material.

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