JP7225393B2 - Tobacco sheets, tobacco rods and smoking articles - Google Patents

Description

The present invention relates to tobacco sheets containing tobacco material.

A tobacco web comprising tobacco material has been disclosed (WO 96/32854). The tobacco web cylindrically surrounds the tobacco filler. The tobacco web contains at least twice the basis weight of the base web of tobacco material. A tobacco web is also referred to as a tobacco sheet.

Such tobacco webs have reduced tensile strength compared to conventional traditional cigarette wrappers due to the inclusion of tobacco material in the sheets. Therefore, when this tobacco web is used in a conventional cigarette winding machine, the tobacco web tends to break during manufacturing.

Also, the tobacco web has poor glue adhesion. For this reason, a tobacco rod wound with this tobacco web is likely to have adhesion defects during manufacturing, that is, puncture wounds in which the tobacco rod bursts. If the amount of glue is increased in order to improve the adhesiveness, the paste will protrude, resulting in poor appearance. Further, if the temperature of the heater in the cigarette winding machine is increased to improve the adhesiveness, the tobacco web tends to be scorched, resulting in poor appearance. Furthermore, it is possible to take measures to improve adhesiveness by securing a sufficiently long hardening time of the paste, but this reduces the rotation speed of the cigarette winding machine and deteriorates the manufacturing efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tobacco sheet that can be used as it is in a current cigarette winding machine, and that can be used in this to enable high-speed manufacturing of smoking articles.

A tobacco sheet according to one embodiment of the present invention contains 15 to 60% by mass of tobacco material, 20 to 70% by mass of cellulosic fiber, has a thickness of 55 to 85 μm, and a basis weight of 25 to 42 g/m. ² , and the tensile strength is 12 N/15 mm or more.

According to the present invention, it is possible to provide a tobacco sheet that can be used in existing cigarette winding machines as it is, and that can be used in such machines to enable high-speed manufacturing of smoking articles.

FIG. 1 is a schematic cross-sectional view showing the little cigar of the embodiment. FIG. 2 is an exploded perspective view showing the chipping paper of the little cigar shown in FIG. FIG. 3 is a graph showing the relationship between Clark stiffness and thermal efficiency of wrapping papers of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example. FIG. 4 is a graph showing the relationship between the Bekk smoothness and the thermal efficiency of the wrapping papers of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example.

An embodiment of a smoking article, ie, a little cigar, containing tobacco sheets as wrapping paper will be described below with reference to FIGS. 1 to 4. FIG. The following description is intended to illustrate the invention and is not intended to limit the invention. Moreover, the drawings schematically show each component of the invention. Therefore, the dimensions on the drawings may not necessarily match the dimensions on the actual product.

The little cigar 11 is a kind of cigar and has an appearance and structure substantially similar to those of ordinary cigarettes. Little cigars 11 differ from cigarettes only in that tobacco sheets are used instead of wrapping paper for wrapping the tobacco filler. The little cigar 11 includes a tobacco rod 12 , a filter portion 13 provided adjacent to the tobacco rod 12 , and tipping paper 14 connecting the tobacco rod 12 and the filter portion 13 .

The filter portion 13 has a cylindrical shape. The filter part 13 has a filter main body 15 and a roll paper 16 covering the periphery of the filter main body 15 . The portions where the ends of the paper roll 16 are overlapped are adhered with an adhesive made of, for example, a vinyl acetate resin-based emulsion.

Filter body 15 can be formed from various types of fillers. In the present embodiment, the filter body 15 is composed of a filler of cellulose-based semi-synthetic fibers such as acetate, but the filler is not limited to this. Fillers include, for example, vegetable fibers such as cotton, hemp, Manila hemp, palm and rush, animal fibers such as wool and cashmere, regenerated cellulose fibers such as rayon, cellulose semisynthetic fibers such as diacetate and triacetate, nylon, Synthetic fibers such as polyester, acrylic, polyethylene, polypropylene or combinations thereof can be used. The component of the filter unit 13 may be a charcoal filter containing charcoal particles or a filter containing particulates other than charcoal particles, in addition to the acetate filter described above. Also, the filter unit 13 may be configured with two or more segments.

Further, the filter body 15 can contain a plasticizer. Any type of plasticizer may be used for the filter body 15 of the filter unit 13 . For example, triethyl citrate, acetyl-triethyl citrate, acetyl-tributyl citrate, dibutyl tartrate, ethylphthalyl-ethyl glycolate, methylphthalyl-ethyl glycolate, triacetin, triethyl phosphate, triphenyl phosphate, tripropionin or combinations thereof can use things. In some cases, no plasticizer may be used.

Moreover, the filter main body 15 may contain a flavor such as menthol. The method of adding the flavor is not particularly limited, but for example, a string-like substance to which the flavor is adsorbed is arranged in the filter body 15, the flavor is included in the filling of the filter part 13, or the flavor is fixed in a capsule or the like. Alternatively, a method of arranging the material that has been converted into the filter part 13 may be used.

The type and material of the paper roll 16 do not matter. The air-permeable wrapping paper 16 used for general tobacco products may be used, or it may be non-air-permeable. As the material of the paper roll 16, paper made using vegetable fibers is generally used, but a sheet made using chemical fibers of polymer materials (eg, polypropylene, polyethylene, nylon, etc.) is also used. Alternatively, a sheet produced by molding a melt of a polymer material may be used, or a metal foil such as aluminum foil may be used.

A non-wrap filter as shown in FIG. 15 of WO 2004/066761 may be used for the filter body 15 . A non-wrap filter has a filter material and a skin layer for forming the filter material into a cylindrical shape, and the skin layer is obtained by thermoforming the filter material. Therefore, when a non-wrap filter is used, no web is required.

The material of the tip paper 14 does not matter. Paper (pulp) made of vegetable fibers is generally used for the tip paper 14, but sheets made of chemical fibers of polymer materials (eg, polypropylene, polyethylene, nylon, etc.) A sheet produced by molding a melt of a polymer-based material may be used, or a metal foil such as an aluminum foil may be used.

The tobacco rod 12 has a tobacco filler 17 and a wrapping paper 18 wound around the tobacco filler 17 . The wrapping paper 18 has an overlapping portion formed by overlapping the ends. At the overlapped portion, the ends of the wrapping paper 18 are adhered to each other with an adhesive composed of, for example, a vinyl acetate resin-based emulsion.

The tobacco filler 17 is generally composed of cuts (ie, short fillers) formed by cutting leaf tobacco (ie, dried tobacco leaves used in tobacco products) into predetermined lengths and widths. The tobacco filler 17 may further include a sheet-shaped molded product obtained by forming pulverized leaf tobacco into a sheet and then chopping it into strips. The sheet-shaped molding may be composed of a tobacco sheet 21, which will be described later. This sheet-like molding may contain an aerosol-generating base material and a fragrance component. Aerosol-forming substrates and flavoring ingredients may be added to the cut tobacco. Aerosol-forming substrates include glycerin, propylene glycol (PG), triethyl citrate (TEC), triacetin, 1,3-butanediol, and the like. These may be used alone or in combination of two or more.

The wrapping paper 18 is composed of a paper containing tobacco material, that is, a tobacco sheet 21 . The tobacco sheet 21 contains cellulosic fibers in addition to tobacco material. The tobacco sheet 21 is generally composed of a paper-made sheet formed by a general paper-making process, but may be a sheet formed by other methods (for example, rolling, casting, etc.). .

The cellulosic fibers are generally pulps, such as one or more of wood pulps, non-wood pulps, and synthetic fiber pulps. Preferably, the cellulosic fiber is wood pulp. Cellulosic fibers do not include fibers derived from tobacco leaves. The tobacco sheet 21 preferably contains 20 to 70% by mass of cellulosic fiber, preferably 25 to 65% by mass of cellulosic fiber, and more preferably 30 to 60% by mass of cellulosic fiber.

The tobacco sheet 21 further includes tobacco material. Tobacco material generally refers to dried leaf tobacco and its processed products in a state or preparation stage for use in tobacco products. The tobacco material is preferably leaf tobacco (ie, dried tobacco leaf used in tobacco products). The tobacco material is more preferably composed of a finely ground raw material or a shredded raw material formed by shredding or shredding leaf tobacco (ie, shredded or shredded leaf tobacco). The tobacco sheet 21 preferably contains 10 to 60% by mass of tobacco material, preferably 15 to 55% by mass of tobacco material, and more preferably 20 to 50% by mass of tobacco material. As the weight percent of tobacco material increases, tensile strength and Beck smoothness tend to decrease.

The tobacco sheet 21 may further contain other additives such as fillers and combustion improvers. The tobacco sheet 21 preferably contains 10 to 40% by mass of other additives, more preferably 15 to 35% by mass of other additives, and even more preferably 20 to 30% by mass of other additives. . Other additives may be any one of calcium carbonate, aluminum hydroxide, aluminum oxide, titanium dioxide, kaolin, talc, silica, or a mixture of some of them. .

The basis weight of the tobacco sheet 21 is 25-42 g/m ² , preferably 28-40 g/m ² , more preferably 30-39 g/m ² , still more preferably 32-38 g/m ² .

The thickness of the tobacco sheet 21 is 55-85 μm, preferably 60-80 μm, more preferably 65-78 μm, and even more preferably 69-76 μm.

The tobacco sheet 21 is preferably subjected to calendering. Calendering is a method of smoothing, imparting gloss, compressing, and reducing/averaging the thickness of an object by passing the object (i.e., tobacco sheet) between smooth rollers. is. At this time, one roller is an iron roller, and the other roller is an elastic roller formed by winding an elastic material such as paper, cotton, or rubber around the iron roller.

The tensile strength of the tobacco sheet 21 is preferably 12 N/15 mm or more, preferably 12 to 30 N/15 mm, more preferably 13 to 20 N/15 mm, and more preferably 13 to 15 N/15 mm. More preferred. Measurement of tensile strength was performed according to JISP8113:2006. To measure the actual tensile strength, a "tensile tester (Strograph E-S)" manufactured by Toyo Seiki Seisakusho Co., Ltd. was used.

Clark stiffness of the tobacco sheet 21 is preferably 15 cm ³ /100 or less, preferably 10 to 15 cm ³ /100, more preferably 11 to 14 cm ³ /100, more preferably 12 to 13 cm ³ /100. It is even more preferable to have Clark stiffness was measured according to JISP8143:2009. A "Clark Stiffness Tester" manufactured by Toyo Seiki Seisakusho Co., Ltd. was used to measure the actual tensile strength. If the Clark stiffness can be reduced, the force acting in the peeling direction (repulsive force) during adhesion is reduced. As a result, the drying time of the adhesive is shortened, and the winding speed of the tobacco rod 12 can be improved. Specifically, not only tobacco rods with a circumference of 23 mm to 27 mm (so-called normal size), but also tobacco rods with a circumference of 16 to 23 mm (so-called thin roll size) (that is, tobacco rods with a circumference of 18 to 23 mm (so-called slim size) size) and a tobacco rod with a circumference of 16 to 18 mm (so-called super slim)), the winding speed could be improved.

The Beck smoothness of the tobacco sheet 21 is preferably 15 sec or more, preferably 15 to 30 sec, more preferably 17 to 27 sec, even more preferably 19 to 24 sec. Beck smoothness was measured according to JISP8119:1998. A “Digibec smoothness tester” manufactured by Toyo Seiki Seisakusho was used for the actual measurement of Beck smoothness. In the Beck smoothness, the larger the number, the smoother the surface to be measured. If the Bekk smoothness can be increased, the application state and adhesive strength of the adhesive are improved.

Next, a method for manufacturing the wrapping paper 18 (tobacco sheet 21) of the present embodiment and a method for manufacturing smoking articles using the wrapping paper 18 will be described.

The wrapping paper 18 (tobacco sheet 21) of the present embodiment can be manufactured by a method in which a part of the widely known paper manufacturing process is modified.

The papermaking process for producing the wrapping paper 18 (tobacco sheet 21) of the present embodiment includes (1) pulping, (2) conditioning, (3) papermaking, (4) processing/finishing, and (4) processing/finishing, similar to well-known papermaking processes. 4 steps.

(1) The pulping process performs chemical and mechanical treatments. The process removes cellulose fibers, or pulp, from wood. The pulp is dewatered and bleached after the entrained dust has been removed.

(2) The adjustment step includes two steps of disaggregation using a pulper and beating using a refiner. The disaggregated pulp is uniformly mixed with water. To this water-mixed pulp, tobacco leaves cut into small pieces are mixed in a separate step. The beater cuts the pulp and small pieces of tobacco into shorter fibers and fluffs them (fibrillates them) to facilitate binding between the fibers.

The wrapping paper 18 (tobacco sheet 21) of the present embodiment can be fibrillated further by increasing the degree of beating performed in a known papermaking process, thereby strengthening the bonds between the fibers. The degree of beating can be increased, for example, by performing the beating under stronger beating conditions (e.g., increasing the concentration of the raw material or decreasing the flow rate of the raw material) than those used in known papermaking processes. When the fibrillation progresses further and the bonds between the fibers become stronger, the strength of the tobacco sheet can be improved and the basis weight can be reduced. Reducing the basis weight of the tobacco sheet can lead to reduced thickness and reduced stiffness.

(3) In the papermaking process, the materials sent from the adjustment process are made into actual paper. In the wire portion, the mixture of pulp, leaf tobacco and water is spread evenly. In the press section, water is squeezed from the mixture. In the dryer section, the base paper of the tobacco sheet from which moisture has been removed is dried. In the calendering section, the surface of the tobacco sheet base paper is smoothed. In the reel part, the manufactured tobacco sheet base paper is wound into a roll.

(4) In processing and finishing, the surface of the tobacco sheet base paper is smoothed by a calendering device. The calender device has a first roller made of iron and a second roller facing the first roller and having elasticity. The calendering device can form a smooth calendered tobacco sheet by sandwiching the tobacco sheet base paper between the first roller and the second roller and applying pressure thereto. The second roller is a roller that has an elastic surface by winding an elastic material such as paper, cotton, or rubber around an iron roller. The tobacco sheet 21 is completed by performing calendering in a calendering device and, if necessary, other processing and post-treatment such as coating, cutting, and winding into a roll.

This tobacco sheet 21 is mounted on a conventional general cigarette winding machine to form the tobacco rod 12 . The tobacco rod 12 is connected to the filter part 13 and the tipping paper 14 which are produced in a separate process, thereby completing the smoking article (that is, the little cigar 11).

The tobacco sheet 21 and the smoking article using the same (that is, the little cigar 11) are not limited to those described in the above embodiment and modifications, and are constructed within the scope of the present invention at the implementation stage. Elements can be transformed and embodied. Also, some components may be deleted from all the components shown in the embodiments.

Various parameters of the wrapping papers of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example are shown in Tables 1 to 3 below.

[Example 1]
In the little cigar 11 of Example 1, the wrapping paper was composed of a tobacco sheet 21 containing tobacco material together with cellulosic fibers. The tobacco sheet 21 contains 50% by mass of tobacco material and 30% by mass of wood pulp. This tobacco sheet 21 contains 20% by mass of other additives such as fillers and combustion improvers. The basis weight of the tobacco sheet 21 is 38 g/m ² . The tobacco sheet 21 has a thickness of 76 μm. The tobacco sheet 21 of Example 1 is calendered.

The tobacco sheet 21 has a tensile strength of 15 N/15 mm. The tobacco sheet 21 has a Clark stiffness of 12 cm ³ /100. The Bekk smoothness of the tobacco sheet 21 is 19 sec.

A tobacco rod 12 and a little cigar 11 were produced using the tobacco sheet 21 thus constructed. For winding up the tobacco rod 12 and manufacturing the little cigar 11 including the tobacco rod 12, a cigarette winding machine that is generally used for making cigarettes was used. The production rate of Little Cigar 11 was 8000 cpm. cpm is the number of little cigars 11 produced per minute. The speed at which the tobacco sheet 21 passed through the heater of the cigarette winding machine was 456 m/min.

As the adhesive for bonding the ends of the tobacco sheet 21 together, an adhesive composed of a vinyl acetate resin emulsion was used. The amount of the adhesive was 125% by weight when the weight used for adhering the ends (superposed portions) of the "common cigarette paper" used in the reference example was 100%.
The amount of the adhesive is shown in Table 3 as the amount ratio (%) of the adhesive calculated by the following formula.
Amount ratio (%) of adhesive = {(mass of adhesive used for winding target little cigar)/(mass of adhesive used for winding reference example cigarette)} x 100

The temperature of the heater for drying the adhesive in the cigarette winding machine was 280°C. In this example, there was no problem with the winding aptitude, and there was no occurrence of so-called flat winding, in which the tobacco rod 12 burst due to poor adhesion during winding. Further, the tobacco sheet 21 was not scorched by heating when drying the adhesive.

Sensory evaluation was carried out by several testers on the smoking taste of Little Cigar 11 of Example 1. As a result, the tester commented that compared to the market product "Golden Bat" Little Cigar (Japan Tobacco Inc.), "It has a slightly fibrous feel, but the unpleasant taste is reduced. Furthermore, the susceptibility to the aroma of the flavoring agent added to the tobacco increased, the tobacco flavor increased, and the bitterness decreased. Therefore, the smoking taste of the little cigar 11 of Example 1 was generally good.

[Example 2]
In the little cigar 11 of Example 2, the wrapping paper was composed of a tobacco sheet 21 containing tobacco material together with cellulosic fibers. This tobacco sheet 21 contains 20% by mass of tobacco material and 60% by mass of wood pulp. This tobacco sheet 21 contains 20% by mass of other additives such as fillers and combustion improvers. The basis weight of the tobacco sheet 21 is 32 g/m ² . The tobacco sheet 21 has a thickness of 69 μm. The tobacco sheet 21 of Example 2 is calendered.

The tobacco sheet 21 has a tensile strength of 13 N/15 mm. The tobacco sheet 21 has a Clark stiffness of 13 cm ³ /100. The Bekk smoothness of the tobacco sheet 21 is 24 sec.

A tobacco rod 12 and a little cigar 11 were produced using the tobacco sheet 21 thus constructed. A general cigarette winding machine was used for winding up the tobacco rod 12 and manufacturing the little cigar 11 including the tobacco rod 12 . The production rate was 6000 cpm. The speed at which the tobacco sheet 21 passed through the heater of the cigarette winding machine was 342 m/min.

As the adhesive for bonding the ends of the tobacco sheet 21 together, an adhesive composed of a vinyl acetate resin emulsion was used. The amount of the adhesive was 125% by weight when the weight used for adhering the ends (superposed portions) of the "common cigarette paper" used in the reference example was 100%. The temperature of the heater for drying the adhesive in the cigarette winding machine was 280°C. In this example, there was no problem with the winding aptitude, and there was no occurrence of so-called flat winding, in which the tobacco rod 12 burst due to poor adhesion during winding. Further, the tobacco sheet 21 was not scorched by heating when drying the adhesive.

The smoking taste of the little cigar 11 of Example 2 was sensory evaluated by several testers. As a result, the comments from the testers were, compared to the market product "Golden Bat" Little Cigar (Japan Tobacco Inc.), "Tendency to increase the sweetness that remains in the aftertaste. The bitterness is further reduced (that is, compared to the Little Cigar of Example 1) and the little cigar likeness is reduced.The smoking taste is acceptable.". Therefore, the smoking taste of the little cigar 11 of Example 2 was within the allowable range for the product.

[Comparative Example 1]
In the little cigar 11 of Comparative Example 1, the wrapping paper was composed of the tobacco sheet 21 containing the tobacco material together with the cellulosic fiber. This tobacco sheet 21 contains 70% by mass of tobacco material and 10% by mass of wood pulp. This tobacco sheet 21 contains 20% by mass of other additives such as fillers and combustion improvers. The basis weight of the tobacco sheet 21 is 46 g/m ² . The tobacco sheet 21 has a thickness of 106 μm. The tobacco sheet 21 of Comparative Example 1 was not calendered.

The tobacco sheet 21 has a tensile strength of 10 N/15 mm. The tobacco sheet 21 has a Clark stiffness of 18 cm ³ /100. The Bekk smoothness of the tobacco sheet 21 is 7 sec.

A tobacco rod 12 and a little cigar 11 were produced using the tobacco sheet 21 thus constructed. A general cigarette winding machine was used for winding up the tobacco rod 12 and manufacturing the little cigar 11 including the tobacco rod 12 . The production rate was 2000 cpm. The speed at which the tobacco sheet 21 passed through the heater of the cigarette winding machine was 114 m/min.

As the adhesive for bonding the ends of the tobacco sheet 21 together, an adhesive composed of a vinyl acetate resin emulsion was used. The amount of the adhesive was 250% by mass when the mass used for adhering the ends (superimposed portions) of the "common cigarette paper" used in the reference example was 100%. The temperature of the heater for drying the adhesive in the cigarette winding machine was 280°C. In this comparative example, a so-called blowout occurred, in which the tobacco rod 12 burst due to poor adhesion during winding. For this reason, the little cigar 11 of Comparative Example 1 had a problem with respect to winding suitability. Further, the tobacco sheet 21 was not scorched by heating when drying the adhesive.

[Comparative Example 2]
In the little cigar 11 of Comparative Example 2, the wrapping paper was composed of the tobacco sheet 21 containing the tobacco material together with the cellulosic fiber. The tobacco sheet 21 contains 50% by mass of tobacco material and 30% by mass of wood pulp. This tobacco sheet 21 contains 20% by mass of other additives such as fillers and combustion improvers. The basis weight of the tobacco sheet 21 is 46 g/m ² . The tobacco sheet 21 has a thickness of 99 μm. The tobacco sheet 21 of Comparative Example 2 is calendered.

The tobacco sheet 21 has a tensile strength of 11 N/15 mm. The tobacco sheet 21 has a Clark stiffness of 18 cm ³ /100. The Bekk smoothness of the tobacco sheet 21 is 10 sec.

A tobacco rod 12 and a little cigar 11 were produced using the tobacco sheet 21 thus constructed. A general cigarette winding machine was used for winding up the tobacco rod 12 and manufacturing the little cigar 11 including the tobacco rod 12 . The production rate was 4000 cpm. The speed at which the tobacco sheet 21 passed through the heater of the cigarette winding machine was 228 m/min.

As the adhesive for bonding the ends of the tobacco sheet 21 together, an adhesive composed of a vinyl acetate resin emulsion was used. The amount of the adhesive was 125% by weight when the weight used for adhering the ends (superposed portions) of the "common cigarette paper" used in the reference example was 100%. The temperature of the heater for drying the adhesive in the cigarette winding machine was 280°C. In this comparative example, a so-called blowout occurred, in which the tobacco rod 12 burst due to poor adhesion during winding. For this reason, the little cigar 11 of Comparative Example 2 had a problem with respect to winding suitability. Further, the tobacco sheet 21 was not scorched by heating when drying the adhesive.

[Reference example]
For the smoking article of the reference example, "general cigarette wrapping paper" containing no tobacco material and containing cellulosic fibers as a main component was used. Therefore, the smoking article of the reference example is a cigarette, not a little cigar. This cigarette paper contains 70% by mass of wood pulp. This cigarette paper contains 30% by mass of other additives such as fillers and combustion improvers. The basis weight of the cigarette paper is 26 g/m ² . The thickness of the cigarette paper is 45 μm. The cigarette paper of Reference Example was not calendered.

The tensile strength of "common cigarette paper" is 14 N/15 mm. The Clark stiffness of the cigarette paper is 9 cm ³ /100. The cigarette paper has a Bekk smoothness of 48 sec.

A tobacco rod 12 and a cigarette were produced using such "ordinary cigarette wrapping paper". A general cigarette winding machine was used for winding up the tobacco rod 12 and manufacturing a cigarette including the tobacco rod 12 . The production rate was 9000 cpm. The speed at which the cigarette paper passed the heater of the cigarette machine was 513 m/min.

As an adhesive for adhering the ends of ordinary cigarette papers, an adhesive composed of a vinyl acetate resin-based emulsion was used. The amount of the adhesive is 100% by mass, since the mass used for bonding the ends (superimposed portions) of the wrapping paper in a typical cigarette is 100%. The temperature of the heater for drying the adhesive in the cigarette winding machine was 200°C. Since each condition of this reference example is a proven condition that is used for winding general cigarettes, naturally there is no problem with winding aptitude. Therefore, the so-called flat winding, in which the tobacco rod bursts due to poor adhesion during winding, did not occur. Further, the tobacco sheet 21 was not scorched by heating when drying the adhesive.

[Evaluation of the relationship between Clark stiffness and thermal efficiency]
First, the “dry heat quantity” is defined as follows.
Amount of drying heat = heater temperature (°C) / speed at which the wrapping paper passes through the heater (m/min)
Next, “thermal efficiency (%)” was defined as follows.
Thermal efficiency (%) = [{(drying heat amount of reference example cigarette)/(drying heat amount of target little cigar)}/(adhesive amount ratio)] × 100
"Amount ratio of adhesives" is as defined above.
Amount ratio (%) of adhesive = {(mass of adhesive used for winding target little cigar)/(mass of adhesive used for winding reference example cigarette)} x 100

Here, FIG. 3 shows the relationship between Clark stiffness and thermal efficiency of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example. As a result, it was found that the lower the Clark stiffness, the higher the thermal efficiency. This is because the stiffness (Clark stiffness) of the wrapping paper is lowered, and the force (repulsive force) acting in the peeling direction during adhesion is reduced. As a result, the drying time of the adhesive is shortened and the winding speed of the tobacco rod is increased This is thought to be due to

The following can be said from this evaluation. That is, compared with Comparative Examples 1 and 2, if the Clark stiffness can be reduced as in the tobacco sheets of Examples 1 and 2, the production efficiency of little cigars will be improved.

[Evaluation of the relationship between Beck smoothness and thermal efficiency]
FIG. 4 shows the relationship between Beck smoothness and thermal efficiency of Examples 1 and 2, Comparative Examples 1 and 2, and Reference Example. As a result, it was found that the higher the Beck smoothness, the higher the thermal efficiency. It is believed that this is because the smoothness of the wrapping paper improves the adhesive application state and adhesive strength, and as a result, the drying time of the adhesive is shortened and the winding speed of the tobacco rod 12 is increased. be done.

The following can be said from this evaluation. That is, compared with Comparative Examples 1 and 2, if the Beck smoothness can be improved like the tobacco sheets of Examples 1 and 2, the production efficiency of the little cigars 11 will be improved.

The following can be said from the above embodiments, examples, comparative examples, and reference examples.

According to one embodiment, the tobacco sheet 21 comprises 10-60 wt. ² , and the tensile strength is 12 N/15 mm or more. According to this configuration, even when the tobacco sheet 21 is configured by including a predetermined amount of tobacco material in the cellulosic fiber, the tensile strength can be maintained high to some extent. As a result, a structural material using the tobacco sheet 21 as a supporting structure of the cigarette, for example, the wrapping paper 18 wound around the tobacco filler 17, the wrapping paper 16 covering the filter body 15, or the tobacco rod 12 and the filter. It can also be used as tip paper 14 that connects the part 13 . Alternatively, the tobacco sheet 21 can also be used as the tobacco filling material 17 that does not easily lose its shape.

According to a preferred embodiment, in the above embodiment, the tobacco sheet 21 has a Clark stiffness of 15 cm ³ /100 or less. According to this configuration, the Clark stiffness of the tobacco sheet 21 can be reduced in a direction approaching that of general cigarette paper. Therefore, when the tobacco sheet 21 is used for the various wrappers (i.e., the wrapping paper 18, the wrapping paper 16, and the tipping paper 14), various columnar structures (i.e., the tobacco rod 12, the filter section 13) wrapped with the wrapper can be used. , little cigar 11 or cigarette) can be stabilized. Therefore, it is possible to prevent, as much as possible, the occurrence of poor adhesion and resulting rupture in various columnar structures.

According to a preferred embodiment, in any of the above embodiments, the tobacco sheet 21 has a Bekk smoothness of 15 sec or more. According to this configuration, the Bekk smoothness of the tobacco sheet 21 can be reduced in a direction approaching that of general cigarette wrapping paper. For this reason, when the tobacco sheet 21 is used as the various wrappers (that is, the wrapping paper 18, the wrapping paper 16, and the tipping paper 14), the tobacco sheet 21 becomes smooth, so that It is possible to improve the application state and adhesive strength of the adhesive. This makes it possible to stabilize the shape of various cylindrical structures (that is, tobacco rod 12, filter portion 13, little cigar 11 or cigarette) wrapped with the wrapper. Therefore, it is possible to prevent, as much as possible, the occurrence of poor adhesion and resulting rupture in various columnar structures.

According to a preferred embodiment, in any of the above embodiments, the tobacco sheet 21 is calendered. According to this configuration, the thickness of the tobacco sheet 21 can be reduced by calendering, and the Clark stiffness of the tobacco sheet 21 can be reduced. In addition, calendering can reduce the Bekk smoothness. As a result, for example, when the tobacco sheet 21 is used as the various wrappers (that is, the wrapping paper 18, the wrapping paper 16, and the tipping paper 14), the adhesive is applied to the overlapping portions of the ends of the tobacco sheet 21. Condition and bond strength can be improved. The shape of various columnar structures (that is, tobacco rod 12, filter portion 13, little cigar 11 or cigarette) formed thereby can be stabilized.

According to a preferred embodiment, in any of the above embodiments, the tobacco sheet 21 is a papermaking sheet. According to this configuration, the tobacco sheet 21 can be formed by a general paper-making process, so that the existing paper-making apparatus used for manufacturing the wrapping paper 18 of traditional cigarettes can be used for manufacturing the tobacco sheet 21 as it is. Therefore, the cost required for installing a papermaking apparatus for manufacturing the tobacco sheet 21 can be reduced, and the cost required for manufacturing the tobacco sheet 21 can be reduced.

According to a preferred embodiment, in any of the above embodiments, the tobacco sheet 21 is a wrapping paper wrapped around the tobacco filler 17 . According to this configuration, the tensile strength of the tobacco sheet 21 can be sufficiently increased, so even when the tobacco sheet 21 is used as the wrapping paper 18, the tobacco sheet 21 can be prevented from being broken.

As described above, by manufacturing a columnar structure using the above tobacco sheet, a columnar structure having a thickness equivalent to that of a normal cigarette (i.e., a circumference of about 25 mm) can be manufactured without puncturing. In addition, a columnar structure thinner than a normal cigarette could be manufactured without causing puncture. In particular, a columnar structure with a circumference of about 17 mm, called super-slim size, could also be produced. That is, using the above tobacco sheet, it is possible to manufacture smoking articles having a circumference of 16 mm to 27 mm without puncturing. In particular, when the tobacco sheet had a Clark stiffness of 15 cm ³ /100 or less, repulsion of the tobacco sheet during winding was less likely to occur, which facilitated the manufacture of a thin columnar structure.

As described above, smoking articles can be manufactured at high speed by applying the tobacco sheet to the current hoist. In addition, high-speed manufacturing means 5000 cpm or more, for example.

Other embodiments of the present invention are appended.
[1] Containing 10 to 60% by mass of tobacco material, containing 20 to 70% by mass of cellulosic fiber, having a thickness of 55 to 85 μm, a basis weight of 25 to 42 g/m ² , and a tensile strength of 12 N / A tobacco sheet of 15 mm or more.
[2] The tobacco sheet according to [1], wherein the tensile strength is 12 to 30 N/15 mm, preferably 13 to 20 N/15 mm, more preferably 13 to 15 N/15 mm.
[3] Clark stiffness is 15 cm ³ /100 or less, preferably 10 to 15 cm ³ /100, more preferably 11 to 14 cm ³ /100, still more preferably 12 to 13 cm ³ /100 [1] or [2] The tobacco sheet described in .
[4] The tobacco sheet according to any one of [1] to [3], having a Beck smoothness of 15 sec or less, preferably 15 to 30 sec, more preferably 17 to 27 sec, and even more preferably 19 to 24 sec. .
[5] The tobacco sheet according to any one of [1] to [4], containing the cellulosic fiber in an amount of 25 to 65% by mass, preferably 30 to 60% by mass.

[6] The tobacco sheet according to any one of [1] to [5], wherein the cellulosic fibers do not contain fibers derived from tobacco leaves.
[7] Any one of [1] to [6], wherein the cellulosic fiber is pulp, preferably one or more selected from the group consisting of wood pulp, non-wood pulp, and synthetic fiber pulp The tobacco sheet described in .
[8] The tobacco sheet according to any one of [1] to [7], wherein the cellulosic fibers are wood pulp.
[9] The tobacco sheet according to any one of [1] to [8], containing the tobacco material in an amount of 15-55% by mass, preferably 20-50% by mass.
[10] The tobacco sheet according to any one of [1] to [9], wherein the tobacco material is leaf tobacco.
[11] Any one of [1] to [10], further containing an additive in an amount of preferably 10 to 40% by mass, more preferably 15 to 35% by mass, still more preferably 20 to 30% by mass Cigarette sheet as described.

[12] Any one of [1] to [11], wherein the additive is one or more selected from the group consisting of calcium carbonate, aluminum hydroxide, aluminum oxide, titanium dioxide, kaolin, talc, and silica The tobacco sheet described in .
[13] The grammage according to any one of [1] to [12], wherein the basis weight is 28 to 40 g/m ² , preferably 30 to 39 g/m ² , more preferably 32 to 38 g/m ² . cigarette sheet.
[14] The tobacco sheet according to any one of [1] to [13], wherein the thickness is 60-80 μm, preferably 65-78 μm, more preferably 69-76 μm.
[15] The tobacco sheet according to any one of [1] to [14], wherein the tobacco sheet is a calendered tobacco sheet.
[16] The tobacco sheet according to any one of [1] to [15], which is a tobacco sheet for wrapping paper.

[17] a tobacco filler;
the tobacco sheet according to any one of [1] to [16] as wrapping paper wound around the tobacco filler;
a tobacco rod.
[18] A tobacco rod comprising a tobacco filler and the tobacco sheet according to any one of [1] to [16] as wrapping paper wound around the tobacco filler;
a filter portion provided facing the tobacco rod;
A smoking article comprising:
[19] The smoking article of [18], wherein the smoking article has a circumference of 16 mm to 27 mm.
[20] The smoking article of [18], wherein the smoking article has a circumference of 23 mm to 27 mm.
[21] The smoking article of [18], wherein the smoking article has a circumference of 16 mm to 23 mm.
[22] The smoking article of [18], wherein the smoking article has a circumference of 18 mm to 23 mm.
[23] The smoking article of [18], wherein the smoking article has a circumference of 16 mm to 18 mm.

DESCRIPTION OF SYMBOLS 11... Little cigar, 12... Tobacco rod, 13... Filter part, 14... Chip paper, 15... Filter body, 16... Rolling paper, 17... Tobacco filler, 18... Wrapping paper, 21... Tobacco sheet.

Claims (10)

tobacco filler;
a tobacco sheet as wrapping paper wound around the tobacco filler;
A tobacco rod having
The tobacco sheet contains 20 to 50% by mass of tobacco material, 30 to 60% by mass of cellulosic fiber, has a thickness of 69 to 76 μm , a basis weight of 32 to 38 g/m ² , and has a tensile strength of is 12 N/15 mm or more. The tobacco sheet has a Clark stiffness of 15 cm. ³ /100 or less, the tobacco rod according to claim 1. 3. The tobacco rod according to claim 1, wherein the tobacco sheet has a Beck smoothness of 15 sec or more. The tobacco rod according to any one of claims 1 to 3, wherein the tobacco sheet is calendered. A tobacco rod according to any one of claims 1 to 4, wherein said tobacco rod has a circumference of 16mm to 27mm. A tobacco rod having a tobacco filler and a tobacco sheet as wrapping paper wrapped around the tobacco filler;
a filter portion provided facing the tobacco rod;
A smoking article comprising
The tobacco sheet contains 20 to 50% by mass of tobacco material, 30 to 60% by mass of cellulosic fiber, has a thickness of 69 to 76 μm , a basis weight of 32 to 38 g/m ² , and has a tensile strength of is 12 N/15 mm or more. The tobacco sheet has a Clark stiffness of 15 cm. ³ /100 or less. The smoking article according to claim 6 or 7, wherein the tobacco sheet has a Bekk smoothness of 15 sec or more. The smoking article according to any one of claims 6 to 8, wherein the tobacco sheet is calendered. A smoking article according to any one of claims 6 to 9, wherein said smoking article has a circumference of 16mm to 27mm.

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