JP3235952B2 - Cigarette with water dispersible filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cigarette with a water-dispersible filter.

[0002]

2. Description of the Related Art With the growing interest in global environmental problems, governments, businesses, and consumers have been working to solve various problems. In particular, in terms of environmental pollution, throwing out cigarette butts in public places has become a major social problem. To reduce environmental pollution caused by cigarette butts, it is essential to improve the manners of consumers, but enlightenment activities alone are not expected to have a sufficient improvement effect. Therefore, even if cigarette butts are thrown away, there is a need for a filter-equipped cigarette that can quickly disperse and dissipate and minimize the impact on the environment.

[0003] In recent years, various proposals have been made for such demands. For example, as for a filter, a filter rod made of a water-soluble material (Japanese Unexamined Patent Application Publication No.
No. 38, JP-A-6-327454), a filter rod made of a biodegradable material (utility model registration No. 3).
No. 003418 Registered Utility Model Gazette, Japanese Utility Model Laid-Open No. 6-644
No. 93, JP-A-5-74299) and a filter rod made of a water-dispersible (water-disintegrating) material (JP-A-7-166) has been proposed.

[0004]

However, materials used for cigarettes are required to have physical properties suitable for mass production and high-quality product characteristics. Among these materials, paper used for wrappers and chip paper that wrap filter rods includes paper strength (tensile strength, folding strength, etc.) including mechanical strength corresponding to high-speed cigarette manufacturing technology. ,
Excellent water resistance). Therefore, the cigarette butts using such wrappers and chip paper can maintain the original shape of the filter chip for a long time even if the filter rod itself is water-soluble, biodegradable or water-dispersible. Become.

The present invention has been made in view of the above circumstances, and provides a cigarette with a water-dispersible filter in which tobacco butts themselves are rapidly dispersed and dissipated due to rainfall or the like.

[0006]

SUMMARY OF THE INVENTION The present invention includes a filter rod, a wrapper disposed on the peripheral surface of the filter rod, and a chip paper disposed on the peripheral surface of the wrapper via a water-soluble adhesive. A filter tip, and a cigarette with a water-dispersible filter including a cigarette rod connected to one end of the filter section, wherein the wrapper and the tip paper have a water dispersion rate in the range of 40 to 100%. Wherein the water dispersibility of the wrapper is equal to or higher than the water dispersibility of the tip paper, and a water dispersible filter-attached cigarette is provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The present inventors left the butts of a conventional cigarette with a filter outdoors and observed the deterioration over time. As a result, cigarette rods in the butts disperse and dissipate early or shrink significantly. In contrast, the filter tip retained its original shape for a long period of time, and in the first year of standing, the tip paper wrapping the filter rod and the portion of the wrapper on the opposite side to the place in contact with the ground were dispersed, exposing the filter rod. . In addition, even when a filter rod made of a cellulosic fiber using various water-soluble adhesives was combined with a commonly used wrapper and chip paper, there was no significant difference in the dispersion and dissipation of butts.

Therefore, the present inventors presumed that the tip paper and the wrapper hindered the dispersion and dissipation of the filter chips, and studied various materials for the tip paper and the wrapper to complete the present invention. Was.

The wrapper and chip paper used in the water-dispersible filter-attached cigarette of the present invention have a water dispersion within the range of 40 to 100%. Here, the water dispersion rate is determined as follows. First, into a beaker containing 200 ml of water, a sample whose known weight was cut into a square of 2.5 cm was put, and 600 r. p. Stir for 20 minutes at m. After stirring, the mixture is immediately poured into a 10-mesh sieve, the residue on the sieve is dried, and the weight is measured. Then, the following equation (1)
Is used to calculate the water dispersion rate.

[0010]

(Equation 1)

When the water dispersibility of the wrapper and the tipping paper is less than 40%, the filter chips dissociate as large flocs even when dispersed in water, and are insufficient for dispersing the filter chips in water. No improvement effect is observed. It is desirable that the water dispersibility of the wrapper and the chip paper is as excellent as possible. However, if the water dispersibility exceeds 95%, the strength of the paper is significantly reduced and the air permeability is improved by the air permeability reduction processing described later. It becomes difficult. For this reason, the water dispersion of the wrapper and chip paper is preferably 40 to 95%, particularly preferably 50 to 95%.
It is in the range of ９５95%.

The wrapper and chip paper used in the present invention are described, for example, in JP-B-43-1214, JP-B-48-27605, and JP-A-6-1921991.
No. 4,075,045, etc., according to a known method for producing water-soluble paper or hydrolyzed paper.

Further, the present inventors have found that when the water dispersion of the wrapper is higher than the water dispersion of the chip paper, the water dispersibility of the filter chip is further improved. That is, since the water dispersibility of the wrapper disposed on the inner side of the tip paper is high, the water dispersibility of the filter chip is synergistically improved as compared with the case where the water dispersibility of the tip paper and the wrapper is equivalent. .
Conversely, when the water dispersibility of the tip paper is higher than that of the wrapper, the water dispersibility of the filter tip depends on the water dispersibility of the wrapper, so the synergistic improvement of the water dispersibility of the filter tip will not increase. unacceptable. When the water dispersibility of the wrapper is at least 10% higher than the water dispersibility of the chip paper, the water dispersibility of the filter chip is significantly improved, which is particularly preferable.

Such a synergistic improvement in water dispersibility is achieved by a two-layer wrapper covered with chip paper.
The same applies to a so-called dual filter or a filter tip of a cigarette with a filter using a triple filter or the like in which a cavity is arranged between two filters. This is an important finding in the use of a chip paper which has conventionally been required to be reduced to a predetermined air permeability even at the expense of water dispersibility in a cigarette with a water dispersible filter. That is, one of the factors that regulate the amount of tar and nicotine transferred into the mouth is filter ventilation (filter ventilation). If you do not want the filter tip to ventilate the filter, use a wrapped tip paper that has almost no air permeability.If you want the filter tip to ventilate the filter, use a mechanical or laser device on the tip paper. It is common to provide a predetermined amount of aperture.
As described above, it is generally advantageous in terms of cigarette design and production cost to selectively use chip paper having different apertures, rather than selectively using chips having different air permeability in accordance with the ventilation level.

[0015] The air permeability of the wrapper and the tipping paper is preferably somewhat low because it affects the production of tar and nicotine in the smoke, which affects the commercial quality of cigarettes. Further, it is preferable that the wrapper and the tip paper have a considerable strength so as to withstand high-speed processing by a filter winder and a cigarette winder.

However, the known water-soluble paper and water-disintegrated paper which can be used in the present invention are formed into a sheet structure in which the beating of the papermaking raw material is suppressed during the production thereof and the bonding between fibers is small, so that the paper Low strength, inevitably extremely high air permeability. Therefore, in order to reduce the permeability of the water-soluble paper and the water-disintegrated paper, for example, a coating treatment of applying a water-soluble resin having a film forming property to the paper surface, or a method of laminating a water-soluble resin sheet or film It is necessary to perform a known treatment for reducing the paper permeability such as described above.

The present inventors examined the amounts of tar and nicotine in smoke by changing the air permeability of the wrapper and chip paper in various ways. As a result, when the air permeability of the wrapper and the tip paper was in the range of 1 to 200 Coresta, there was almost no change in the amounts of tar and nicotine in the smoke.

On the other hand, the strength of the wrapper and the tip paper was examined using an apparatus generally used in the production of cigarettes.
It has been found that there is no problem if the tensile strength in the longitudinal direction (longitudinal direction of the filter chip) of the wrapper and the tip paper according to the measurement method described in 1 above is 1 kg or more.

The filter rod used in the cigarette with a filter of the present invention is preferably made of a material excellent in water dispersibility or biodegradability. More specifically, filter rods are made of cellulose fibers (cellulose acetate, viscose rayon, wood pulp,
Hemp pulp or the like and having improved water dispersibility in accordance with known techniques are useful. Cellulose acetate fibers most frequently used as filter rods generally have fiber bundles converged and fused and fixed between fibers with a plasticizer. However, this filter rod is disadvantageous in terms of dispersibility due to rainfall and the like because the fibers are fused between fibers. Therefore, when the cellulose acetate fiber is used as the filter rod, the water dispersibility can be increased by converging the fiber as it is without adding a plasticizer or by bonding the fibers with a water-soluble adhesive at around normal temperature. preferable. As the water-soluble adhesive, for example, JP-A-6-3
For example, a polyvinyl alcohol-based resin described in Japanese Patent No. 19512 can be used. Further, a nonwoven fabric manufactured from cellulosic fibers using a water-soluble adhesive may be used. Also, paper made of vegetable fiber can be used.

A wrapper and a chip paper are sequentially wound on the peripheral surface of such a filter rod. Here, to wind up the wrapper and tip paper,
It is preferable to use a water-soluble adhesive. The use of the water-soluble adhesive reduces the adhesive strength between the members due to the presence of water, and promotes the dispersion and dissipation of the filter chip. Examples of the water-soluble adhesive include commonly used synthetic polymers (eg, polyvinyl alcohol, polyvinylpyrrolidone, etc.), cellulose derivatives (eg, carboxymethyl cellulose salts, carboxyethyl cellulose salts, etc.), starches (eg, potato starch,
Mechanical suitability and adhesion among plant constituent polysaccharides (eg, alginate, mannan, etc.) or plant mucilage (eg, gum arabic, trangant gum, etc.) and a mixture of at least two of them. It can be appropriately selected and used in consideration of power and the like.

In order to adhere the chip paper to the peripheral surface of the wrapper, it is useful to improve the water dispersibility of the filter chip by reducing the application area of the adhesive as far as possible without deteriorating the quality of the cigarette. It is. For example, the adhesive can be distributed only to the overlapping portions of the both side edges of the chip paper, the joint side with the cigarette rod, and the area near the mouth side. By distributing the adhesive only in a limited area on the peripheral surface of the wrapper, dispersion and dissipation of the chip paper starts from the area where the adhesive is not applied, and the adhesive is applied to the entire peripheral surface of the wrapper. The onset of dispersion and dissipation is earlier than in the case of distribution. Needless to say, the adhesive may be applied to both or any one of the outer surface of the wrapper and the inner surface of the chip paper.

If necessary, printing may be performed on the peripheral surface of the chip paper. In this case, when a normal gravure printing or offset ink is used, the formed film is water-resistant, and the water dispersibility of the printed portion is significantly impaired. Therefore, a water-soluble ink containing a water-soluble resin is useful for printing. This water-soluble ink is different from the water-based ink commonly used in the printing industry,
The vehicle to be compounded is a water-soluble resin, and a film formed after printing dissolves in water. This water-soluble ink is prepared from various materials described below in consideration of the finish of printing and water dispersibility.

First, as a water-soluble resin used as a vehicle, for example, starch, dextrin, polyvinyl alcohol, hydroxyethylcellulose, carboxymethylcellulose salt or the like, or a mixture of at least two of them can be used. When only such a water-soluble resin is used as a vehicle, printing quality is likely to be reduced, problems such as mottling are likely to occur, and practicality may be poor. In this case, mineral oil, vegetable oils such as linseed oil, synthetic drying oils such as dehydrated castor oil, natural resins such as rosin, and synthetic resins such as denatured alkyd resins, which are used as vehicles in general printing inks The problem can be solved by adding a small amount of a cellulose derivative such as nitrocellulose.

The main solvent of the water-soluble ink is water. However, in order to improve the drying property of the ink film, the dispersibility of the pigment, the fluidity of the ink, etc., alcohols and glycols which are water-soluble and have an appropriate boiling point are used. And an organic solvent such as glycol ketone. The pigments may be those used in general printing inks, and a surfactant or an antifoaming agent such as silicone oil may be added as necessary.

In the cigarette with a water-dispersible filter of the present invention, the water dispersion of the wrapper and the tip paper is in the range of 40 to 100%, and the water dispersion of the wrapper is equal to or less than the water dispersion of the chip paper. That is all. Therefore, the wrapper and the tip paper surrounding the filter rod are quickly dispersed and dissipated due to rainfall or the like. Therefore, dispersion and dissipation of the entire filter tip are promoted.

[0026]

Embodiments of the present invention will be described below in detail. Test Example 1 Water-dispersed papers A to G having the basis weight, thickness, tensile strength, air permeability, and water dispersibility as shown in Table 1 were prepared. These water-dispersed papers were obtained from Mishima Paper Co., Ltd. Also,
A chip paper and a wrapper conventionally used as a control were prepared. Here, the air permeability of the aqueous dispersion papers A to G and the control product was determined by Coresta Recommended Method No. 3 (CORESTA RE
According to the method specified in COMMENDED METHOD No. 3), it was measured using a tobacco air permeability measurement device.

These papers were used as wrappers and chip papers in the combinations shown in Table 2 to obtain sample Nos.
9 cigarettes with a filter were produced. The filter rods used for these samples were obtained by using a cellulose acetate tow (3Y-36000) as a filter medium, and wound up with a wrapper without adding a plasticizer.
An aqueous solution of polyvinyl alcohol (dry matter concentration: 6% by weight) was used as an adhesive for the wrapper. This filter rod was cut into a length of 25 mm, and connected to one end of a cigarette rod common to all samples with tip paper. An aqueous solution of polyvinyl alcohol (dry matter concentration: 6% by weight) was used as an adhesive for the chip paper. The adhesive was applied over the entire inner surface of the tipping paper. The specifications of the cigarette with a filter thus obtained are as follows.

Length: Cigarette rod 60 mm,
Filter tip 25mm, total length 85mm circumference; 25mm Wrapper and tip paper can be wound up by 5,000 cigarette winders per minute, and 1
This was done using a filter winder with 400 m rolls per minute.

With respect to the cigarettes with filters of Sample Nos. 1 to 9, the feasibility of production, dispersibility, the amount of tar and nicotine in smoke, and the number of times of smoking were examined. Table 2 also shows these results.

[0030]

[Table 1]

[0031]

[Table 2]

The dispersibility of the cigarette with a filter was measured using a weather resistance tester: Xenon arc lamp weather meter (manufactured by Suga Test Instruments Co., Ltd.) according to ISO4892.
According to the test method of -1981, a basic cycle consisting of a combination of water jetting for 12 minutes and light irradiation at 40 ° C. and 60% RH for 60 minutes was repeated, and the degree of dispersion was visually observed over time. .

The amounts of tar and nicotine in the smoke of the cigarette with a filter were measured by smoking under standard smoking conditions according to the TIOJ (Japan Tobacco Association) method. As shown in Table 2, the cigarettes with filters of Sample Nos. 7 and 8 used water-dispersed paper G having a tensile strength of 0.8 kg. It could not be manufactured.

Regarding the dispersibility of the cigarette with a filter, the cigarette with a filter using the control product of Sample No. 9 as a wrapper and a chip paper showed almost no change even after 50 cycles. On the contrary,
The cigarettes with filters of Sample Nos. 2 to 6 using the aqueous dispersion papers B to F having an aqueous dispersion ratio of 40% or more were all 10 cigarettes.
Dispersed within cycles. The higher the water dispersion, the more the filter chips were dissipated. In particular, the cigarettes with filters of Sample Nos. 5 and 6 were rapidly dispersed in 1-2 cycles.

However, the cigarette with a filter of Sample No. 1 using the water-dispersed paper A having a water-dispersion rate of less than 40% was such that a part thereof was gradually dissipated in 30 cycles, and the water-dispersibility was poor.

Regarding the amounts of tar and nicotine in the smoke, a control product was used except for the cigarette with a filter of Sample No. 6 in which the air permeability of the paper used for the wrapper and the tip paper exceeded 200 Coresta. It was confirmed that it was almost the same as the cigarette with a filter of Sample No. 9.

Test Example 2 As shown in Table 3, water-dispersible papers having different water-dispersion rates were combined with the wrapper and chip paper to produce filter-type cigarettes of Sample Nos. 11 to 16 according to the same procedure as in Test Example 1. Sex was observed. The results are shown in Table 3.

[0038]

[Table 3]

As is clear from Table 3, the filter paper cigarette of Sample No. 11 using the water-dispersed paper having a higher water dispersibility than the wrapper as the chip paper, the chip paper was easily dispersed, but the dispersion of the wrapper was slow. Even after 30 cycles, the shape of the filter tip did not collapse. On the other hand, the water dispersion of the tip paper is lower than the water dispersion of the wrapper, and the difference between the two is 10%.
All of the cigarettes with filters of Sample Nos. 13 to 16 were rapidly dispersed and dissipated in 1 to 5 cycles. Also, the larger the difference, the more the dispersion is promoted,
As a result, it was found that the shape collapse of the filter tip was also accelerated.

Test Example 3 Sample No. 4 showing good dispersibility in Test Example 1 except that the adhesive for the chip paper was changed to an emulsion type vinyl acetate resin (dry matter concentration: 40% by weight).
In accordance with the same procedure as for the cigarette with a filter of No. 21, a cigarette with a filter of Sample No. 21 was produced, and the dispersibility of the cigarettes with a filter of Sample Nos. 4 and 21 were compared and examined. Table 4 shows the results.

[0041]

[Table 4]

As is clear from Table 4, the cigarette with a filter of Sample No. 4 using an adhesive made of water-soluble polyvinyl alcohol was dispersed in 2 to 4 cycles. In contrast, the cigarette with a filter of sample No. 21 using a water-insoluble vinyl acetate resin was gradually dispersed in 5 to 6 cycles, and a delay in dispersion was observed.

Test Example 4 The adhesive was not applied to the entire inner surface of the chip paper, but as shown in FIG. 1 (A), the overlapping portions 12 on both side edges of the chip paper 11 and the joint side with the cigarette rod. A cigarette with a filter of Test No. 31 was produced in the same manner as the cigarette of Sample No. 2 of Test Example 1, except that the cigarette was applied only to the vicinity region 13 and the vicinity region 14 on the mouth opening side. Further, as shown in FIG. 1B, the overlapping portions 12 on both side edges of the chip paper 11, the vicinity region 13 on the side of the joint with the cigarette rod, the vicinity region 14 on the mouth side, and the region 13 The cigarette with a filter of Test No. 32 was prepared in the same manner as the cigarette of Sample No. 2 of Test Example 1 except that it was applied only to the band-like regions 15, 16, 17, and 18 provided at intervals between the sample and the sample. Was prepared. The dispersibility of these cigarettes was compared. Table 5 shows the results.

[0044]

[Table 5]

As is clear from Table 5, sample No. 31,
In each of the 32 filter cigarettes, the dispersibility of the chip paper was remarkable from the portion where the adhesive was not applied, and the dispersibility was significantly improved as compared with the filter cigarette of Sample No. 2 of Test Example 1.

Test Example 5 Among the yellow ink for gravure printing (ink I) and the vehicle used for the gravure printing ink having the following composition and produced by a general preparation, a resin which becomes water-resistant after forming a film (specifically, , Nitrocellulose, dehydrated castor oil, chlorinated rubber) with polyvinyl alcohol resin having poor water resistance.
An ink (ink II) which exhibited the same color development as ink I prepared by changing to a 0% aqueous solution was prepared. Using these inks I and II, Zahn Cup No. 15 in 3
After adjusting to second passage, gravure printing machine (plate depth 30 μm)
Each was solid printed on the outer surface of the chip paper.

Composition of Ink I Food Yellow No. 4 Aluminum Lake 10 parts by weight Food Yellow No. 5 Aluminum Lake 10 parts by weight Nitrocellulose 40 parts by weight Dehydrated castor oil 30 parts by weight Chloride rubber 10 parts by weight Ethyl acetate / toluene mixed solution The cigarettes of Sample Nos. 41 and 42 were produced according to the same procedure as for the cigarette of Sample No. 16 of Test Example 2 except that the tip paper printed on was used. The dispersibility of these cigarettes was observed. Table 6 shows the results. According to the printing with Ink II, the drying time was slightly prolonged due to the effect of the solvent (aqueous isopropyl alcohol solution), and "crossing" and "mottling" were slightly generated on the printed surface.

[0048]

[Table 6]

As is apparent from Table 6, when the cigarette of Sample No. 41, that is, the ordinary ink I, was used, the dispersibility was significantly reduced as compared with the cigarette of Sample No. 16 which was not printed. On the other hand, sample number 4
When the cigarette No. 2 was used, that is, when the ink II using a water-soluble vehicle was used, the dispersion was slightly delayed, and was not recognized to substantially inhibit the dispersion of the cigarette.

Test Example 6 As a filter medium of a filter rod, (1) cellulose acetate tow (3Y-3600)
0) a fiber bundle obtained by adding 10% of a water-soluble adhesive composition (dry matter concentration: 7% by weight) in which equal amounts of polyvinyl alcohol and polyvinylpyrrolidone are blended; (2) cellulose acetate staple fiber (single yarn fineness: 3Y, length: 5 mm) ) To which the above-mentioned water-soluble adhesive composition was added by 10% (basis weight: 156 g / m ² , thickness: 3.1 m)
m), (3) thin paper (basis weight 25.0 g / m ² , thickness 32.4 μm) made from low-leafed hardwood lumber pulp LBKP and softwood lumber pulp NBKP as main raw materials, (4) the aforementioned main raw materials Water-dispersible paper blended with fibrous sodium carboxymethylcellulose (basis weight 3
(8.3 g / m ² , thickness 49.6 μm), and (5) cellulose acetate tow (3Y-
36000) to prepare filter rods using fiber bundles each containing 8% of triacetin. Using these filter rods, as shown in Table 7, cigarettes with filters of sample numbers 51 to 55 were prepared according to the same procedure as in Test Example 1 using water-dispersion paper D for the wrapper and water-dispersion paper B for the tip paper. Produced. Dispersibility of these cigarettes with a filter was observed. The results are shown in Table 7.

[0051]

[Table 7]

As shown in Table 7, in the cigarette with a filter using the control product in which the fiber was fused with (5) triacetin of Sample No. 55, only the wrapper and the tip paper were dispersed, and the dispersion of the filter rod was hardly observed. I couldn't. On the other hand, sample Nos. 51 and 5 using (1) cellulose acetate tow fiber bundle, (2) cellulose acetate nonwoven fabric and (4) water-dispersible paper.
In the 2,54 filter cigarettes, the dispersion of the filter rods proceeded in parallel with the dispersion of the wrapper and the tip paper, and was substantially dispersed in 2 to 4 cycles. (3) The cigarette with a filter of sample No. 53 using thin paper is the sample No. 51 or 52 using another filter medium,
The dispersion progressed more slowly than the filter-type cigarette of No. 54, but finally the size of the filter-type cigarette was different from that of the sample No. 55 (5) Filter-type cigarette using a control product in which fibers were fused with triacetin. Has shrunk.

[0053]

As described above, in the cigarette with a water-dispersible filter of the present invention, the water dispersion of the wrapper and the tip paper is in the range of 40 to 100%, and the water dispersion of the wrapper is the tip paper. Is equal to or higher than the water dispersion rate of For this reason, the wrapper and the tip paper surrounding the filter rod are quickly dispersed and dissipated due to rainfall and the like, and the dispersal and dissipation of the entire filter tip are promoted. As a result, even if the cigarette butts of the cigarette with a water-dispersible filter are thrown away, the cigarette butts are quickly dispersed and dissipated due to rainfall or the like, and the influence on the environment is reduced.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams each showing an example of an application pattern of an adhesive to a chip filter.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A24D 1/04 A24D 3/00 A24D 3/08 A24D 3/10 A24D 3/14

Claims (8)

(57) [Claims] 1. A filter chip including a filter rod, a wrapper disposed on a peripheral surface of the filter rod, and a chip paper disposed on a peripheral surface of the wrapper via a water-soluble adhesive, and the filter. A cigarette with a water dispersible filter including a cigarette rod connected to one end of a chip, wherein the wrapper and the chip paper have a water dispersibility of 4%.
A cigarette with a water dispersible filter, wherein the water dispersibility of the wrapper is in the range of 0 to 100% and is equal to or higher than the water dispersibility of the chip paper. 2. The cigarette with a water dispersible filter according to claim 1, wherein the water dispersibility of the wrapper and the chip paper is in the range of 40 to 95%. 3. The water dispersion of the wrapper is 50 to 95%.
Within 1% of the water dispersion of the chip paper.
3. The cigarette with a water-dispersible filter according to claim 1, which is higher by 0% or more. 4. The cigarette with a water-dispersible filter according to claim 1, wherein the tensile strength of the wrapper and the chip paper in the longitudinal direction is 1 kg or more. 5. The cigarette according to claim 1, wherein the air permeability of the wrapper and the tip paper is in the range of 1 to 200 Coresta. 6. The water-soluble adhesive is distributed only in the overlapping portion of the both side edges of the chip paper, the joint portion with the cigarette rod, and the region near the mouth opening side. The cigarette with a water-dispersible filter according to one of the above. 7. The cigarette with a water-dispersible filter according to claim 1, wherein the peripheral surface of the chip paper is printed with a water-soluble ink containing a water-soluble resin. 8. The filter rod according to claim 1, wherein the filter rod is made of a cellulose acetate fiber bundle converged without adding a plasticizer, a cellulose acetate fiber bundle adhered with a water-soluble adhesive, a nonwoven fabric, or a plant fiber paper. 7. The cigarette with a water-dispersible filter according to any one of 7.