TWI750160B - Paper for smoking article and smoking article - Google Patents

Abstract

Provided is a paper for smoking article, which contains cellulous fibers, and is paper-made by adding cellulous nano-fibers and filler particles that is an adsorbent or a catalyst having an average particle diameter of primary particle of 1μm or less.

Description

Paper for smoking articles and smoking articles

The present invention relates to a paper for a smoking article and a smoking article.

A smoking article, such as a cigarette with a filter, includes: a tobacco rod formed by wrapping shredded tobacco with a paper; and a filter formed by wrapping a filter material with a filter paper. Cigarettes have, for example, a structure in which a rod and a filter are butted together, and the outer peripheral surface of the rod and the outer peripheral surface of the filter in the vicinity of the butted portion are wrapped and joined by an outer layer paper.

During smoking of smoking articles, the mainstream cigarette smoked by the smoker may contain unnecessary chemical components, such as carbon monoxide, lower aldehydes represented by formaldehyde, nitrogen oxides, tar and other components. In order to remove these components, filler particles such as adsorbents and catalysts are generally contained in paper for smoking articles such as filter materials and wrapping papers.

Patent Document 1 discloses a smoking article containing a metal oxide or carbonate in order to reduce sidestream smoke visible to the naked eye and to bring in modified soot at the same time.

(prior art literature) (patent literature)

Patent Document 1: International Publication No. 2012/133797

For adsorbents and catalysts, the smaller the average particle size of the primary particles, the more the specific surface area increases, and the more the effect of adsorption and decomposition increases. Therefore, it is desirable to use filler particles with a smaller average particle size in the paper-made adsorbent or catalyst added to the paper for smoking articles such as wrapping paper, so that unnecessary chemical components in mainstream cigarettes can be removed more effectively , such as carbon monoxide, lower aldehydes represented by formaldehyde, nitrogen oxides, tar and other components.

However, in conventional paper for smoking articles such as wrapping paper, when filler particles having a small average particle diameter of primary particles are used, the filler particles tend to fall off during the paper production process.

An object of the present embodiment is to provide a paper for smoking articles, which can remove unnecessary chemical components in mainstream smoke, and can suppress the falling off of filler particles during manufacture, thereby improving the productivity.

According to the present embodiment, there is provided a paper for smoking articles characterized by containing cellulose fibers, adding cellulose nanofibers and filler particles having an average particle size of primary particles of 1 μm or less as adsorbents or catalysts The way by the paper maker.

According to the paper for smoking articles of the present embodiment, unnecessary chemical components in mainstream smoke can be removed, and drop-off of filler particles can be suppressed during production, thereby improving productivity.

1‧‧‧Cigarette with filter

11‧‧‧Cigarette rod

12‧‧‧Filter

13‧‧‧Outer Paper

14‧‧‧Tobacco shreds

15‧‧‧Rolling Paper

16, 26‧‧‧Filter material

17‧‧‧Filter Reeling Paper

Fig. 1 is a perspective view of a smoking article provided with a paper for smoking article.

Fig. 2 is a perspective view of a filter material using paper for smoking articles.

Hereinafter, the paper for smoking articles of the embodiment will be described in detail.

The paper for the smoking article of the present embodiment contains cellulose fibers and is made by adding cellulose nanofibers and filler particles having an average particle size of primary particles of 1 μm or less as adsorbents or catalysts.

In general, paper can be made by reconstituting and drying a wet paper in which cellulosic fibers are suspended. In wet paper, loose hydrogen bonds are formed between cellulose fibers via water molecules, and the cellulose fibers gradually approach each other as they dry. As a result, in the dried paper, the cellulose fibers are directly bonded to each other through hydrogen bonds.

On the other hand, if filler particles are added to wet paper for papermaking, the filler particles hinder the formation of hydrogen bonds between cellulose fibers. As a result, the paper made by adding filler particles is weaker than the paper made by adding no filler particles, and the direct bonding of cellulose fibers is weaker, and the voids between the cellulose fibers are increased. Therefore, in the paper made by adding filler particles, the filler particles tend to fall off during production, thereby reducing the tensile strength and increasing the air permeability. However, paper for smoking articles such as wrapping paper is required to have the air permeability and tensile strength in an appropriate range in order not to spoil the flavor and texture, and to have the strength and handleability required for the manufacture of cigarettes, so fillers are added. particles, and it is necessary to suppress the increase in air permeability and the decrease in tensile strength in the paper to be made into paper. These problems become more conspicuous when the average particle diameter of the primary particles of the filler particles to be added at the time of papermaking is smaller or the amount of the filler particles is larger.

In addition, in order to prevent the falling off of the filler particles, it may be considered to add a binder such as polysaccharide thickener to the wet paper and then make paper, but the binder may cover the surface of the filler particles and be used as an adsorbent or an adsorbent. Since the function of the catalyst tends to decrease, it is not preferable.

The paper for smoking articles of the present embodiment is made by adding cellulose nanofibers to wet paper in addition to filler particles. This paper can strengthen the hydrogen bonds between cellulose fibers by making cellulose nanofibers use hydrogen bonding to bridge the cellulose fibers. Therefore, the paper made by adding filler particles and cellulose nanofibers is more restrained from lowering the tensile strength of the paper than the paper made by adding only filler particles. Moreover, the presence of cellulose nanofibers reduces the voids between the cellulose fibers, thereby suppressing the increase in the air permeability of the paper, making it difficult for the filler particles to fall off during production, and improving the productivity. In addition, since the cellulose nanofibers do not cover the surface of the filler particles, they will not hinder the effect of the filler particles as adsorbents or catalysts. That is, the paper-based cellulose fiber and cellulose nanofibers for the smoking article of the present embodiment are paper-made, and the filler particles are supported in the paper.

According to the paper for smoking articles of the present embodiment, even if filler particles having a small average particle diameter are used, the dropping of filler particles during production is suppressed. Therefore, the paper for the smoking article of the present embodiment can be added in a larger amount of filler particles having a smaller average particle diameter at the time of papermaking than the conventional one. As a result, according to the paper for smoking articles of the present embodiment, unnecessary chemical components such as carbon monoxide, lower aldehydes represented by formaldehyde, nitrogen oxides, and tar in mainstream smoke can be removed more effectively. Furthermore, since the increase in air permeability and the decrease in tensile strength can be suppressed, these can be adjusted according to the physical properties required for the paper for smoking articles.

Hereinafter, cellulose fibers, cellulose nanofibers, and filler particles will be described in detail.

1) Cellulose fiber

Cellulose fibers are not particularly limited, and for example, wood pulp fibers, flax pulp fibers, hemp pulp fibers, or hemp pulp fibers, such as conifer pulp fibers used in general smoking articles, or hardwood pulp fibers, can be used. or a mixture of these. For example, in the paper for smoking articles, it is preferable to contain cellulose fibers of 10 gsm to 40 gsm in order to ensure the air permeability and suppress the decrease of the tensile strength. Cellulose fibers are, for example, made by beating flax pulp fibers with a volume average fiber length of 1478 μm into Schubert. Regler water filtration degree is 60°SR for use.

2) Cellulose nanofibers

Cellulose nanofibers are fibers whose average fiber diameter D is 1 μm or less and fiber length L satisfies L/D>100. The average fiber diameter of the cellulose nanofibers is, for example, 5 nm to 500 nm, more preferably 5 nm to 50 nm. The viscosity of the 2 wt% aqueous solution of the cellulose nanofibers is, for example, 500 mPas to 8000 mPas, preferably 1000 mPas or more, more preferably 6000 mPas to 8000 mPas. The viscosity of the aqueous solution of cellulose nanofibers increases as the average fiber length of the cellulose nanofibers increases, so it is used as a benchmark for the average fiber length of the cellulose nanofibers. The viscosity is a value measured by rotational viscometry at 25° C. and a rotational speed of 60 rpm. Examples of such cellulose nanofibers include BiNFi-s (registered trademark) of biomass material nanofibers manufactured by Sugino Machinery Co., Ltd.

The production method of the cellulose nanofibers is not particularly limited, and can be produced by a production method known to those in the industry. The production methods of long-fiber cellulose nanofibers include the polymer inter-array fiber method, the exfoliation composite spinning method, the modified conventional spinning method, the super draw method, and the laser method. extension method. The production method of short-fiber cellulose nanofibers includes a melt flow method (jet spinning method), a flash spinning method, a beating method, a hybrid spinning method, a stick spinning method, and a bubble sheeting method. Chemical method, bacterial method (bacterial method), metal nuclear hydrocarbon high temperature heating method, casting method, and electrospinning method.

Among the papers for smoking articles, cellulose nanofibers are added to make paper, and it can be determined by analyzing the papers for smoking articles using, for example, a scanning electron microscope (SEM).

3) Filler particles

The filler particles are catalysts or adsorbents that decompose or adsorb unnecessary chemical components contained in mainstream smoke. For example, metal oxides, metal hydroxides, etc. can be used as catalysts, and metal oxides and metal hydroxides can be used from B, Al, Si, Ti, Fe, Co, Ni, Cu, Zn, Ge, Zr, Nb, An oxide or hydroxide of at least one metal element selected from the group consisting of Mo, Ru, Rh, Pd, Ag, Sn, Ce, Hf, Ta, W, Re, Os, Ir, Pt and Au. The adsorbent can be exemplified by porous materials, ion exchange resins, clay minerals, particularly desirable examples are activated carbon, silica, alumina, titania, aluminosilicate, zeolite, mesoporous silica, water Choose from the group consisting of talc, sepiolite, and combinations of these.

The hydrotalcite compound has the structure of layered crystal stacking, which can be represented by the following general formula: M ²⁺ _1-x M ³⁺ _x (OH) ₂ (A ^n- ) _x/n . mH ₂ O (here, M ²⁺ is a divalent metal ion selected from the group consisting of Mg, Zn, Ni and Ca, M ³⁺ is Al ion, ^An- is selected from CO ₃ , SO ₄ , OOC-COO, Cl, Br, F, Fe(CN)6 ^3- , Fe(CN)6 ^4- , phthalic acid, isophthalic acid, terephthalic acid, maleic acid, alkenyl acid and their derivatives, n-valent anion (anion) selected from the group consisting of malic acid, salicylic acid, acrylic acid, adipic acid, succinic acid, citric acid and sulfonic acid, and 0.1<x<0.4, 0<m<2).

The average particle diameter (median diameter (d ₅₀ )) of the primary particles of the filler particles is 1 μm or less, preferably 10 nm to 500 nm, more preferably 10 nm to 100 nm. If the average particle diameter of the primary particles of the filler particles is smaller, the specific surface area of the filler particles is increased, and the effect of adsorbing or decomposing unnecessary chemical components in the mainstream smoke is enhanced by the filler particles, which is desirable. On the other hand, if the average particle diameter of the primary particles of the filler particles is less than 10 μm, the filler particles are likely to be scattered when manufacturing paper for smoking articles, which is not preferable. In addition, the term "primary particle" refers to a unit particle determined from the geometrical appearance of the appearance, while the term "secondary particle" refers to an aggregate formed by agglomeration of a plurality of primary particles.

The filler particles are preferably contained in 2 to 60 wt %, more preferably 10 to 45 wt %, and particularly preferably 25 to 35 wt % in the paper for smoking articles, for example. If the basis weight of the filler particles is less than 2% by weight, depending on the type of filler particles, the effect of adsorbing or decomposing unnecessary chemical components in the mainstream smoke by the filler is reduced, which is not preferable. When the amount of filler particles exceeds 60 wt %, the tensile strength of the paper for smoking articles decreases, and the air permeability increases, so that the physical properties of the paper for smoking articles tend to be unsuitable, which is not preferable. Moreover, as for the filler particle, it is preferable to contain 2 gsm to 40 gsm in the paper for smoking articles, for example, and it is more preferable to contain 10 gsm to 40 gsm.

The air permeability of the paper for smoking articles is, for example, 10 CORESTA units to 500 CORESTA units, and more preferably 10 CORESTA units to 100 CORESA units. The so-called air permeability in this description is when the differential pressure between the two sides of the paper is 100mmH ₂ O, in ml. The unit of cm ² /min represents the flow rate of gas passing through an area of 1 cm ^{2 .} 1ml. cm ² /min is 1 CORESTA unit (1 C.U.). If the air permeability of the paper for smoking articles is less than 10 CORESTA units, the mainstream smoke is not easily contacted with filler particles added to the paper for smoking articles and then made into paper, which is not preferable. When the air permeability of the paper for smoking articles exceeds 500 CORESTA units, when the paper for smoking articles is used as the wrapping paper, the burning speed of the cigarette rod is excessively increased, which is not preferable.

The tensile strength of the paper for smoking articles is preferably 12.5 N/15 mm or more, for example. If the tensile strength of the paper for smoking articles is less than 12.5N/15mm, when the paper for smoking articles is used as the wrapping paper or filter wrapping paper, it may not be able to withstand the mechanical speed of the hoist and break. Not ideal. The basis weight of the paper for smoking articles is, for example, 15 gsm to 100 gsm, more preferably 20 gsm to 80 gsm, and still more preferably 40 gsm to 60 gsm. If the basis weight of the paper for smoking articles is in these ranges, when the paper for smoking articles is used as the wrapping paper or filter wrapping paper, it is not easy to break, and it can be wrapped according to the shape of the tobacco shreds or the filter material. So quite ideal.

In addition to cellulose fibers, cellulose nanofibers, and filler particles, the paper for smoking articles may contain various additives such as flavors, combustion modifiers, and colorants.

The papermaking method of the paper for smoking articles is not particularly limited, and it can be produced by a known papermaking method in the industry. The papermaking method generally includes a papermaking step and a drying step. As the paper machine, those known in the past can be used, such as rotary wire paper machine, inclined short wire paper machine, Fourdrinier wire paper machine, short wire paper machine, etc. The paper machine can be appropriately combined according to the required characteristics. The wet sample used in the papermaking step can be used, for example, to beat the cellulose fibers into Schubert. The slurry prepared with Regler water freeness of 60°SR was prepared by adding a predetermined amount of filler particles and cellulose nanofibers. The sheeted wet paper can be dried by a conventionally known drying method, for example, a yankee dryer, a multi-cylinder type, a hot air type, an infrared heating type, and the like. The wet paper can be dried, for example, at a temperature of 100°C to 150°C.

In addition, the paper for smoking articles is preferably 2 to 32% by weight of cellulose nanofibers, more preferably 4% by weight, relative to the total weight of cellulose fibers, cellulose nanofibers and filler particles. to 13% by weight to be a papermaker. The addition amount of the cellulose nanofibers at the time of papermaking is within the above-mentioned numerical range, and the dropping of the filler particles during production can be effectively suppressed.

The above-mentioned paper for smoking articles is used as various papers constituting the smoking article as shown in FIG. 1, and effects can be obtained. Here, as an example of the smoking article, a filter-attached cigarette will be described, but it may be a structure without a filter. The smoking articles may also be other smoking articles, such as cigars, cigarillos, and the like. In the case of cigars, cigarillos, and the like, it may be constituted before the filler is rolled up with a rope or after it is rolled up with a rope.

Fig. 1 shows a filter-attached cigarette 1 as an example of a smoking article provided with the paper for a smoking article of the present embodiment. The filter-attached cigarette 1 includes a tobacco rod 11, a filter tip 12 arranged so that the end portion and the tobacco rod 11 are butted against each other, and the entire outer peripheral surface of the filter tip 12 and the outer peripheral surface portion of the tobacco rod 11 in the vicinity of the abutting portion are wound. , the outer layer paper 13 that integrates the cigarette rod 11 and the filter tip 12 . The tobacco rod 11 includes the shredded tobacco 14 and the roll paper 15 which winds the shredded tobacco 14 in a cylindrical shape. The filter 12 is provided with a filter material 16 formed by forming acetate tow, paper, pulp nonwoven, etc. into a tow structure in which single fibers are bundled, or folded, or compressed; and the filter material 16 is rolled. The filter winding paper 17 is wound into a cylindrical shape.

Paper for smoking articles is used, for example, as the roll paper 15 shown in FIG. 1 . When such a smoking article 1 is smoked, mainstream smoke from the tobacco rod 11 passes through the inside of the shredded tobacco 14 and the inside of the rolled paper 15 , then passes through the filter 12 and is discharged from the downstream end of the filter 12 . At this time, unnecessary chemical components (eg, carbon monoxide, etc.) contained in the mainstream smoke are adsorbed or decomposed by the filler particles added to the wrapping paper. As a result, unnecessary chemical constituents contained in mainstream tobacco smoked by smokers can be reduced. When the paper for smoking articles is used as a roll paper, it is more preferable to have a tensile strength of 12.5 N/mm or more and an air permeability of 10 CORESTA units to 100 CORESTA units.

Paper for smoking articles is used, for example, as the filter winding paper 17 shown in FIG. 1 . When such a smoking article 1 is smoked, the mainstream smoke from the tobacco rod 11 also passes through the inside of the filter wrapping paper 17 when passing through the filter 12 , and is then discharged from the downstream end of the filter 12 . According to this structure, the same effect as when the above-mentioned paper for smoking articles is used as the roll paper 15 can be obtained.

Paper for smoking articles is used, for example, as the filter material 16 shown in FIG. 1 . Paper for smoking articles is used, for example, as a filter material in which the paper for smoking articles cut into strips is formed into a filter shape, and the paper for smoking articles as shown in FIG. 2 is wrinkled. It becomes the filter material 26 of a pleated structure. When such a smoking article 1 is smoked, mainstream smoke from the tobacco rod 11 passes through the inside of the filter material 16 when passing through the filter 12 , and is then discharged from the downstream end of the filter 12 . According to this structure, the same effect as when the above-mentioned paper for smoking articles is used as the roll paper 15 can be obtained.

In addition, the paper for smoking articles can also be used as the paper for smoking articles other than the wrapping paper 15 , the filter wrapping paper 17 , and the filter material 16 . Moreover, among the smoking articles, the paper for smoking articles may be used as any one or a plurality of paper constituting the wrapping paper, the filter wrapping paper, and the filter material.

(Example and Comparative Example)

Hereinafter, the present embodiment will be described in more detail based on Examples 1 to 16 and Comparative Examples 1 to 6. According to the method shown below, test samples of Examples 1 to 16 and Comparative Examples 1 to 6 were produced.

Embodiment 1, 2

_{As filler particles, hydrotalcite (Mg 6} Al ₂ (OH) ₁₆ CO ₃ .4H ₂ O) having an average particle diameter of primary particles of 50 nm and a BET surface area of 111.5 m ² /g was used. As the cellulose nanofibers, FMa-10002, a type of BiNFi-s (registered trademark) of biomaterial nanofibers manufactured by Sugino Machinery Co., Ltd., was used. In addition, the BiNFi-s (registered trademark) type FMa-10002 has an average fiber diameter of about 20 nm and a viscosity of 700 mPa in a 2 wt % aqueous solution. s The average fiber length of cellulose nanofibers is shorter.

The cellulose fibers belonging to flax pulp fibers are beaten into Schubert according to the addition amount shown in the following table 1. Regler water freeness was adjusted to 60°SR to adjust the slurry. Next, filler particles and cellulose nanofibers were added to the above-beaten flax pulp fibers in the amounts shown in Table 1 below. Next, using the obtained wet paper stock, the wet paper stock was paper-made by a TAPPI standard manual machine. Next, it was dried at 100° C. for about 1 minute using a KRK rotary dryer manufactured by Kumagai Riki Kogyo Co., Ltd. name)) and dried at 105°C for 12 hours. Next, the samples were left to stand under the conditions of a temperature of 22° C. and a relative humidity of 60%, and were cut into predetermined lengths to produce test samples of Examples 1 and 2.

Embodiment 3, 4

In Examples 3 and 4, except for using cellulose nanofibers different from those in Examples 1 and 2, test samples were prepared in the same manner as in Examples 1 and 2 with the addition amounts shown in Table 1 below. As the cellulose nanofibers, IMa-10002, a type of BiNFi-s (registered trademark) of biomaterial nanofibers manufactured by Sugino Machinery Co., Ltd., was used. In addition, the BiNFi-s (registered trademark) type IMa-10002 has an average fiber diameter of about 20 nm and a viscosity of 7500 mPa in a 2 wt % aqueous solution. The average fiber length of s is longer for cellulose nanofibers.

Comparative Example 1

In Comparative Example 1, a test sample was prepared in the same manner as in Examples 1 and 2, except that the cellulose nanofibers were not added and the paper was made according to the addition amounts shown in Table 1 below. That is, the test sample of the comparative example 1 was paper-made from cellulose fibers of flax pulp fibers and filler particles of hydrotalcite.

Comparative Example 2

In Comparative Example 2, test samples were prepared in the same manner as in Examples 1 and 2, except that the paper was made without adding cellulose nanofibers and filler particles. That is, the test sample of Comparative Example 2 was made from only cellulose fibers of flax pulp fibers.

Examples 5 to 6, 9 to 10 and 13 to 14

In Examples 5 to 6, 9 to 10, and 13 to 14, except for the amount of hydrotalcite added at the time of papermaking, it was the same as in Examples 1 and 2, as shown in Table 2, Table 3, and Table 4, respectively. The test samples were prepared according to the added amount.

Examples 7 to 8, 11 to 12 and 15 to 16

In Examples 7 to 8, 11 to 12, and 15 to 16, except for the addition amount of hydrotalcite, the same as in Examples 3 and 4, the addition amounts shown in Table 2, Table 3, and Table 4 were formed, respectively. method to make test samples.

Comparative Examples 3, 4 and 6

In Comparative Examples 3, 4, and 6, except for the addition amount of hydrotalcite, test samples were prepared in the same manner as in Comparative Example 1 so as to form the addition amounts shown in Tables 2, 3, and 4.

Comparative Example 5

In Comparative Example 5, a test sample was prepared in the same manner as in Comparative Example 2 except for the addition amount of the cellulose fibers so as to have the addition amount shown in Table 3.

Tables 1 to 4 show the addition amounts of cellulose fibers, filler particles and cellulose nanofibers, basis weight of paper, The content of filler particles, and the measurement results of (1) the yield of filler particles, (2) air permeability and (3) tensile strength. In Examples 1 to 4 and Comparative Example 1 shown in Table 1, the amount of filler particles added during papermaking was 16 gsm. In Examples 5 to 8 and Comparative Example 3 shown in Table 2, the amount of filler particles added during papermaking was 32 gsm. In Examples 9 to 12 and Comparative Example 4 shown in Table 3, the amount of filler particles added during papermaking was 48 gsm. In Examples 13 to 16 and Comparative Example 5 shown in Table 4, the amount of filler particles added during papermaking was 96 gsm. In Comparative Example 2 shown in Tables 1 and 2, and Comparative Example 5 shown in Tables 3 and 4, no filler particles were added during papermaking. In addition, the addition amount [wt%] of cellulose nanofibers shown in Tables 1 to 4 represents the weight of cellulose nanofibers with respect to the total weight of cellulose fibers, cellulose nanofibers, and filler particles %.

Hereinafter, the measurement methods of each of the tests (1) to (3) will be described.

(1) Yield of filler particles

The yield of filler particles was measured using a hot air circulation dryer (manufactured by Koyo Thermal Systems Co., Ltd., KLO-60M (trade name)). First, each test sample was placed in a hot air circulating dryer set at 105° C. for 12 hours to be dried, and the dry weight of the paper was measured. Next, the content of filler particles in the paper was calculated by subtracting the added amounts of cellulose fibers and cellulose nanofibers at the time of papermaking from the dry weight of the paper. The yield can be calculated from the following formula.

Yield (%)=content of filler particles/addition amount of filler particles during papermaking×100

(2) Air permeability

The measurement of the air permeability was performed according to the method described in Coresta method No. 3 using an air permeability measuring device (manufactured by Borfwaldt, Air Permeability Tester A20 (trade name)). Air permeability is when the differential pressure on both sides of the paper is 100mmH ₂ O, in ml. The unit of cm ² /min represents the flow rate of gas passing through an area of 1 cm ^{2 .} 1ml. cm ² /min is 1 CORESTA unit (1 C.U.).

(3) Tensile strength

The measurement of the tensile strength was performed according to JIS P 8113, using a tensile strength measuring device (manufactured by Toyo Seiki Co., Ltd., STRONGRAPH E3-L (trade name)). Each test sample was cut into a width of 15 mm and a length of 200 mm, stretched at a tensile strength of 200 mm/min, and the load at the time of breaking was set as the value of the tensile strength.

result

The measurement results of the test samples of Examples 1 to 16 and Comparative Examples 1 to 6 will be described.

In Table 1, Examples 1 to 4 in which filler particles and cellulose nanofibers were added to cellulose fibers during papermaking were compared with Comparative Example 1 in which only filler particles were added. Relative to the yield of 47% in Comparative Example 1, the yields of filler particles of Examples 1 to 4 showed higher values of 72% to 92%. Relative to the air permeability of 164 C.U. in Comparative Example 1, the air permeability of Examples 1 to 4 showed lower values of 55.7 C.U. to 120 C.U. Moreover, with respect to the tensile strength of 17.9 N/15mm in the comparative example 1, the tensile strengths of Examples 1 to 4 showed high values of 19.4 N/15 mm to 24.8 N/15 mm. In addition, with respect to the content of filler particles in Comparative Example 1 of 21.8 wt %, Examples 1 to 4 showed high values of 28.7 wt % to 33.2 wt %. From these results, it can be seen that in Examples 1 to 4, cellulose nanofibers are added, and therefore, compared with Comparative Example 1, the yield of filler particles is improved, the air permeability is decreased, and the tensile strength is increased. In addition, in Examples 1 to 4, compared with Comparative Example 1, a larger amount of filler particles having a smaller average particle diameter was added and papermaking was performed, so that unnecessary chemical components in mainstream smoke, that is, carbon monoxide, carbon monoxide, and Formaldehyde is a component of lower aldehydes, nitrogen oxides, tar and the like. Similar results can be obtained from Tables 2 to 4 in which the amount of filler particles added is different from that in Table 1.

In Table 1, Example 1 in which the amount of cellulose nanofibers added during papermaking was 3.58% by weight and Example 2 in which it was 12.94% by weight were compared. In Example 2, since the amount of cellulose nanofibers added during papermaking is large, compared with Example 1, it is known that the yield of the filler is improved, the air permeability is decreased, and the tensile strength is also increased. The same results can be obtained from the results in Tables 2 to 4 in which the amount of filler particles added is different from that in Table 1.

In Table 1, Example 1 in which the cellulose nanofibers added during papermaking were FMa-10002 and Example 3 in which IMa-10002 were used were compared. According to this result, the viscosity of the 2 wt % aqueous solution used in Example 1 was 700 mPa. s FMa-10002, the viscosity of the 2 wt % aqueous solution used in known Example 3 is 7500 mPa. The IMa-10002 of s increases the yield, reduces the air permeability, and has a higher effect of increasing the tensile strength. Similar to the results in Table 1, the same results were obtained from the results in Tables 2 to 4 in which the amount of filler particles added was different.

As described above, since cellulose nanofibers are added to the paper for smoking articles according to the present embodiment, even if filler particles with a small average particle diameter of primary particles are contained, a decrease in yield, a decrease in tensile strength, Increased breathability. In addition, the paper for the smoking article of the present embodiment is made by adding filler particles having a smaller average particle diameter than the conventional paper, and can contain more filler particles, so that the mainstream can be removed more effectively. Construction of unwanted chemical constituents in smoke.

In addition, although several embodiment was demonstrated, these embodiment is only an illustration and does not limit the scope of the invention. These embodiments can be implemented in other various forms, and various changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the inventions described in the claims and their equivalents.

1‧‧‧Cigarette with filter

11‧‧‧Cigarette rod

12‧‧‧Filter

13‧‧‧Outer Paper

14‧‧‧Tobacco shreds

15‧‧‧Rolling Paper

16‧‧‧Filter material

17‧‧‧Filter Reeling Paper

Claims (11)

A paper for smoking articles, which is a paper made of a mixture of cellulose fibers and cellulose nanofibers, and is a paper in which filler particles are supported, wherein the average particle diameter of the primary particles of the filler particles is 1 μm The following adsorbents or catalysts. The paper for smoking articles according to claim 1, wherein the basis weight of the paper for smoking articles is 20 gsm to 80 gsm, and contains 2 wt % to 60 wt % of the filler particles. The paper for smoking articles according to claim 1 or 2, wherein the paper for smoking articles is based on the total weight of the cellulose fibers, the cellulose nanofibers, and the filler particles. , containing 2% to 32% by weight of the aforementioned cellulose nanofibers. The paper for smoking articles according to claim 1 or 2, wherein the paper for smoking articles is based on the total weight of the cellulose fibers, the cellulose nanofibers, and the filler particles. , containing 4% to 13% by weight of the aforementioned cellulose nanofibers. The paper for smoking articles according to claim 1 or 2, wherein the fiber diameter of the cellulose nanofibers is 50 nm or less, and the viscosity of the 2 wt% aqueous solution is 1000 mPa·s or more. The paper for smoking articles according to claim 1 or 2, wherein the average particle diameter of the primary particles of the filler particles is 10 nm to 500 nm. The paper for smoking articles according to claim 1 or 2, wherein the air permeability of the paper for smoking articles is 10 CORESTA units to 500 CORESTA units. The paper for smoking articles according to claim 1 or 2, wherein the paper for smoking articles has a tensile strength of 12.5 N/15 mm or more. A smoking article, comprising the paper for smoking article described in any one of claims 1 to 8 of the scope of application as a rolled paper for shredded tobacco for wrapping cigarettes. A filter-attached smoking article is provided with the paper for a smoking article described in any one of claims 1 to 8 of the patent application scope as a filter wrapping paper for wrapping a filter. A smoking article with a filter is provided with the paper for the smoking article described in any one of claims 1 to 8 of the patent application scope as a filter material.

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