JP2017060405A - Filter cigarette, filter for cigarette, and rolled paper to be used in the cigarette filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter cigarette capable of: suppressing the contamination of tobacco smoke with a foreign substance such as pollens while retaining the excellent air permeability; and in a case of storing a capsule in which a favoring agent is encapsulated in a cigarette filter, suppressing the favoring agent ejected from the capsule from spotting out to a chip paper side, a cigarette filter, and the rolled paper to be used in the cigarette filter.SOLUTION: A filter cigarette comprises: a tobacco part wound having wound tobacco chips with rolled paper; and a filter part connected to one end of said tobacco part and having a filter material. The filter part has a rolled paper formed of a nano-fiber sheet for rolling up the filter material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a filter cigarette, a cigarette filter, and a web used for a cigarette filter.

  In order to relax the taste of a cigarette, a filter cigarette in which a filter is connected to one end of the cigarette is widely known. In the filter cigarette, a filter is connected to one end of a cigarette portion (roll portion) in which a cigarette is wound with a wrapping paper via a chip paper. Such a cigarette filter is formed by wrapping (wrapping) a filter fiber bundle such as acetate with a web. A composite filter including a plurality of types of filter materials is known as a cigarette filter. For example, a dual filter as a composite filter has a plane filter and a charcoal filter, which are integrally connected by a web.

  As described above, the web is used not only for individually wrapping each filter material, but also for connecting a plurality of filter materials integrally. In particular, when distinguishing web paper according to use, the web used in the former application is often referred to as “material paper”, and the web used in the latter application is often referred to as “molded paper”.

  Many filter cigarettes have a perforated row of a plurality of vent holes (ventilation holes) in the chip paper. In such a filter cigarette, when smoking, cigarette smoke (mainstream smoke) is diluted by air flowing into the filter through the vent holes of the perforated row, and the amount of components in the tobacco smoke that the smoker inhales, that is, the amount of nicotine and tar Is reduced. The web applied to this type of filter cigarette needs to have air permeability in order to ensure the mixing rate (ventilation rate) of the air flowing into the cigarette smoke from the vent of the chip paper. .

  As a conventional method for ensuring a ventilation rate, a method is known in which chip paper having a vent hole previously opened is stacked on a web having a certain level of air permeability. In this method, since chip paper having a vent hole previously formed can be used, it is possible to easily form a fine vent hole, which is superior in appearance (design). As another method for securing the ventilation ratio, there is known a method in which chip paper that is not previously vented is overlapped on the winding paper, and a vent hole penetrating the chip paper and the winding paper is formed by a laser or the like. It has been. In the case of this method, it is not necessary to use a web with high air permeability, so that there is a cost advantage.

JP 2008-043347 A

By the way, pollen, dust, and the like may flow into the filter together with air from the vent hole formed in the chip paper. However, with the conventional web, it is difficult to remove (filter) foreign matters such as pollen and dust, and there is a possibility that a smoker may inhale foreign matters such as pollen mixed in tobacco smoke (mainstream smoke). Moreover, the technique which accommodates the capsule which enclosed the fragrance | flavor in the cigarette filter, diffuses a fragrance | flavor from a capsule at the time of smoking, and is improving the flavor is known. In this case, there is a possibility that the perfume oozes out to the chip paper side when the capsule is cracked with the web having high air permeability.

  The present invention has been made in view of the above-mentioned problems, and the object thereof is to ensure that good air permeability is ensured, and that foreign matters such as pollen can be prevented from entering tobacco smoke, and a cigarette filter. In the case of containing a capsule in which a fragrance is enclosed, a filter cigarette, a cigarette filter, and a web used for the cigarette filter that can prevent the fragrance released from the capsule from exuding to the chip paper side are provided. is there.

  In order to solve the above-described problems, the present invention uses a nanofiber sheet to form a web that winds up a filter material incorporated in a cigarette filter.

  More specifically, the filter cigarette according to the present invention includes a cigarette portion in which a cigarette is wound with a wrapping paper, and a filter portion connected to one end of the cigarette portion and having a filter material. It has a web formed by a nanofiber sheet that winds up the material.

  The cigarette filter according to the present invention is a cigarette filter connected to one end of a cigarette portion in which cigarettes are wound with a wrapping paper, and is formed by a filter material and a nanofiber sheet that winds up the filter material. Winding paper.

  Further, the web used for the cigarette filter according to the present invention is a web that winds a filter material incorporated in the cigarette filter, and is formed using a nanofiber sheet.

  The nanofiber sheet is formed by forming nanofibers, which are fibers having a nano-sized diameter, into a sheet shape such as a nonwoven fabric. The nanofiber sheet can reduce air ventilation resistance by a so-called slip flow effect while ensuring high filtration performance. According to the present invention, the filter unit is formed by the nanofiber sheet so that the winding paper for winding the filter material is formed, so that the air permeability required for ventilation of tobacco smoke (mainstream smoke) is satisfactorily secured. Foreign substances such as pollen in the air can be suitably filtered and collected (removed). For this reason, it can suppress that the foreign material contained in the air for ventilation is mixed with tobacco smoke (mainstream smoke). This has the merit that, for example, the inhalation of pollen during normal breathing is reduced with a normal mask or the like, and the smoker who develops hay fever can reduce the inhalation of pollen even during smoking.

  On the other hand, ventilation air used for dilution of cigarette smoke (mainstream smoke) can reduce ventilation resistance by the slip flow effect of nanofibers and ensure high air permeability. A proportion can be realized. Even when a capsule in which a fragrance is encapsulated is contained in a cigarette filter, the web formed by the nanofiber sheet can inhibit the liquid from permeating. Therefore, when the capsule in which the liquid fragrance is encapsulated is broken, it is possible to prevent the liquid fragrance released from the capsule from permeating the winding paper and exuding to the chip paper side.

In the present invention, it is possible to secure a high air permeability while improving the filtration performance of foreign matters such as pollen, so that it is not necessary to provide a ventilation hole in the web. For this reason, after the chip paper is wound around the filter portion, there is no need to form a ventilation hole penetrating both the chip paper and the web of the filter portion. Therefore, it is possible to prepare a chip paper with a hole formed in advance and to connect the tobacco part and the filter part integrally with the chip paper with the hole. And if it does in this way, since a fine ventilation hole can be formed in chip paper, a ventilation hole can be made inconspicuous on the appearance of chip paper. Thereby, it becomes possible to contribute to the improvement of the design property and the degree of freedom of design design in the filter cigarette or the cigarette filter.

  Further, in the present invention, a plurality of filter materials are arranged in the filter unit, and the web is integrated with the material paper for individually winding each of the plurality of filter materials and the plurality of filter materials. And forming paper interconnected by winding, and at least one of the raw paper and the forming paper may be formed of the nanofiber sheet. As described above, the web according to the present invention is called material paper or molded paper depending on the application. In the case of the configuration in which the material paper for individually winding the filter material and the molding paper for integrally winding the filter material wound by the material paper overlap as in the above configuration, the material paper and the molding paper By forming at least one of them with a nanofiber sheet, ventilation air taken from the outside can be satisfactorily introduced into tobacco smoke (mainstream smoke) after removing foreign substances such as pollen.

  Further, in the case where a plurality of filter materials are arranged in the filter unit as in the above configuration, the cigarette unit and the filter unit are interconnected via chip paper, and the chip paper has 1 Alternatively, when a plurality of ventilation holes are formed, a material paper corresponding to a position overlapping the ventilation holes of the chip paper is selected from among the material papers that individually wind up each of the plurality of filter materials. It may be formed of a fiber sheet. That is, when a plurality of filter materials are arranged in the axial direction of the filter unit, only a part of the material papers that wind up each filter material often overlaps the air vent of the chip paper. In such a case, by forming the material paper corresponding to the position overlapping the vent hole of the chip paper with the nanofiber sheet, it is possible to achieve both a high air permeability and a high foreign matter removing function. Conversely, for material paper that does not overlap with the chip paper vents, ventilation air is not directly supplied, so there is no need to actively use nanofiber sheets. It is possible to contribute to the reduction of the manufacturing cost by using the paper material.

  In addition, a capsule enclosing a liquid fragrance may be disposed in the filter unit, and a web formed by the nanofiber sheet may be disposed so as to cover a side of the capsule. As described above, when the capsule in which the fragrance is encapsulated is accommodated in the filter unit, when the capsule in which the liquid fragrance is encapsulated is cracked, the web formed by the nanofiber sheet is released from the capsule. Can be prevented from permeating into the chip paper side. Therefore, it can suppress that the external appearance of a filter cigarette worsens, and can suppress that the image of a product falls.

  In addition, a first filter material and a second filter material are disposed in the filter unit, and the capsule is disposed in a space formed between the first filter material and the second filter material. A material paper for individually winding the material and the second filter material; and a forming paper interconnected by integrally winding the first filter material and the second filter material; At least the molding paper may be formed of the nanofiber sheet.

  Further, means for solving the problems in the present invention can be employed in combination as much as possible.

  According to the present invention, it is possible to provide a filter cigarette, a cigarette filter, and a web used for a cigarette filter that can prevent foreign matters such as pollen from being mixed into tobacco smoke while ensuring good air permeability. Is possible. In addition, when accommodating a capsule in which a fragrance is encapsulated in a cigarette filter, the winding used for a filter cigarette, a cigarette filter, and a cigarette filter that can prevent the fragrance released from the capsule from exuding to the chip paper side. It is possible to provide a paper removal.

It is a block diagram which shows the main structures of the filter cigarette which concerns on embodiment. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning embodiment. 1 is a schematic configuration diagram of an electrospinning apparatus according to an embodiment. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 1st modification. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 2nd modification. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 3rd modification. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 4th modification. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 5th modification. It is the figure which showed typically the cross-sectional structure of the filter for cigarettes concerning a 6th modification. It is the schematic of the evaluation apparatus which concerns on an Example. It is a figure which shows the test result of the comparative example 1. It is a figure which shows the test result of Example 1.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Embodiment 1>
FIG. 1 is a configuration diagram showing a main structure of a filter cigarette 1 according to the present embodiment. FIG. 1 shows a state in which a roll paper and chip paper of a filter unit, which will be described later, are developed. Moreover, FIG. 2 is the figure which showed typically the cross-section of the filter cigarette 1 which concerns on this embodiment.

  The filter cigarette 1 includes a tobacco part 2 and a filter part 3 (cigarette filter) connected to one end of the tobacco part 2. The tobacco part 2 includes a tobacco stamp 21 and a wrapping paper 22 around which the tobacco stamp 21 is wound, and has a rod shape. In FIG.1 and FIG.2, the base end side of the tobacco part 2 is represented partially, and illustration of the front end side in which a combustion part is formed is abbreviate | omitted. The filter unit 3 has at least one filter segment (filter material). The filter unit 3 shown in FIGS. 1 and 2 has a so-called dual filter structure, and includes a first filter segment 41 and a second filter segment 42. More specifically, the filter unit 3 is coaxially connected to the first filter segment 41 serving as the suction port of the filter cigarette 1 and the first filter segment 41 on the upstream side of the sucked tobacco smoke. It has a second filter segment 42.

The first filter segment 41 is a plain filter having a fiber bundle such as cellulose acetate. The second filter segment 42 is, for example, a charcoal filter configured by dispersing an adsorbent such as activated carbon in the plain filter. However, the combination of the plane filter and the charcoal filter constituting the first filter segment 41 and the second filter segment 42 is an example, and various filter materials can be adopted.

  The first filter segment 41 and the second filter segment 42 are individually wound by a first web 51 and a second web 52, respectively. Hereinafter, the webs 51 and 52 that individually wind up the first filter segment 41 and the second filter segment 42 are referred to as a first material paper 51 and a second material paper 52, respectively. The first material paper 51 has the same width dimension as the axial length of the first filter segment 41 in the unfolded state, and covers the first filter segment 41 in the circumferential direction without any excess or deficiency. . Further, the second material paper 52 has the same width dimension as the axial length of the second filter segment 42 in the unfolded state, and covers the second filter segment 42 in the circumferential direction without excess or deficiency. ing.

  The first filter segment 41 and the second filter segment 42 wound by the first material paper 51 and the second material paper 52 are integrally connected by being wound by another winding paper 53. Hereinafter, the web 53 is referred to as “molded paper”. The forming paper 53 has the same width dimension as the axial length of the filter unit 3 and covers the dual filter in the circumferential direction.

  The tobacco part 2 and the filter part 3 are wound together by chip paper 6 and are integrally connected. The chip paper 6 covers the entire circumference of the molding paper 53 and covers the proximal end side of the wrapping paper 22 of the tobacco part 2. The chip paper 6 may be made of, for example, various paper materials used as ordinary chip paper. The chip paper 6 is a chip paper with an opening in which a plurality of ventilation holes (ventilation holes) 61 are formed. Before being wound around the cigarette part 2 and the filter part 3, the ventilation paper 61 is placed in a predetermined position in advance. Is drilled. Various methods can be adopted as a method of forming the ventilation hole 61 in the chip paper 6. For example, the ventilation hole 61 may be formed by using a laser. The ventilation holes 61 may be formed so as to be arranged in a row in the circumferential direction of the filter unit 3 when the chip paper 6 is wound around the filter unit 3. Since the first material paper 51, the second material paper 52, and the molding paper 53 are formed of a breathable material as will be described later, they are the same as the ventilation holes 61 in the chip paper 6. The ventilation holes themselves are not opened.

  In this embodiment, the web in the filter part 3 is formed of a nanofiber sheet. More specifically, at least one of the material papers 51 and 52 as the winding paper provided in the filter unit 3 and the forming paper 53 is formed of a nanofiber sheet. The nanofiber sheet is formed by forming nanofibers, which are fibers having a nano-sized diameter, into a sheet shape like a nonwoven fabric. Although the diameter of the nanofiber used in the present embodiment is assumed to be about several to several hundred nm, for example, it is not limited to this.

  Moreover, the method in particular for producing a nanofiber sheet is not restrict | limited, A well-known method can be used. The nanofiber sheet can be produced by a polymer inter-array fiber method, a peelable composite spinning method, an improved conventional spinning method, a super draw method, a laser drawing method, a melt flow method (jet spinning method), a flash spinning method. , Quick spinning method, mixed spinning method, tack spinning method, foaming sheet forming method (burst method), bacteria method, metal nuclear hydrocarbon high temperature heating method, electrospinning (electrospinning) method and the like.

In the present embodiment, an example in which a nanofiber sheet is generated by an electrospinning method will be described. The electrospinning method is a method in which a liquid to be spun is spun by applying a high voltage, and a discharge liquid is divided into ultrafine fibers and discharged by an electric repulsive force to form nanofibers. Can do.

  FIG. 3 is a schematic block diagram of an exemplary electrospinning apparatus 100 for generating a nanofiber sheet. 3, the electrospinning apparatus 100 includes a syringe (injection cylinder) 101, a needle (injection needle) 102, a DC high-voltage power supply 103, a target collector 104, and the like. The syringe 101 is filled with a material such as a polymer solution, for example, and the polymer solution in the syringe 101 is ejected from the needle 102 by a pump. The electrospinning apparatus 100 injects a polymer solution from the needle 102 while applying a high voltage between the needle 102 and the target collector 104 by a DC high-voltage power source 103. At this time, when the voltage exceeds a predetermined threshold value, the repulsive force of the electric charge overcomes the surface tension of the polymer droplet and a charged jet is generated. Thus, this charged jet stretches in the electric field to form very thin fibers and accumulates on the target collector 104. In this way, nanofiber fibers produced by electrospinning can be deposited.

  Examples of the nanofiber material used in the electrospinning method include heat such as polystyrene, polycarbonate, poly (meth) acrylate, polyvinyl chloride, polyethylene terephthalate, nylon-6,6, and nylon-4,6. Plastic resin, polyurethane, polyvinyl alcohol, polylactic acid, polycaprolactone, polyethylene glycol, polyethylene-vinyl acetate copolymer, polyethylene-vinyl alcohol copolymer, polyethylene oxide, biodegradable polymer such as collagen, polyacrylonitrile, polyamide, Polyaniline, para-aramid, polyvinyl acetate, acetyl cellulose (acetate), and mixtures of the above polymers. However, the above materials are exemplary, and nanofibers may be produced using other materials.

  In the method for producing a nanofiber sheet, the nanofibers accumulated on the target collector 104 of the electrospinning apparatus 100 may be peeled to form a sheet as a web. Alternatively, the nanofiber fibers obtained as described above may be laminated on a separately prepared base material to be formed into a sheet shape to produce a web. Various substrates can be used as the base material on which the nanofibers are laminated. For example, plain paper or high-quality paper may be used.

The filter cigarette 1 according to the present embodiment forms a web of the filter unit 3 (material paper 51, 52, molding paper 53, etc.) using a nanofiber sheet. In the configuration example shown in FIGS. 1 and 2, the first material paper 51 and the second material paper 52 that individually wrap the first filter segment 41 and the second filter segment 42 are formed by a nanofiber sheet. (In the figure, the reference numeral “NFS” indicating a nanofiber sheet is also shown). The air permeability of the first material paper 51 and the second material paper 52 formed by the nanofiber sheet is usually preferably about 1000 to 30000 coresta units (ml / cm ² · min). In the present specification, the air permeability is determined in accordance with ISO 2965-1997, and is 1 when air is passed from one side (2 cm ² ) of paper under a constant pressure of 1 kPa.
Defined as the flow rate of air permeated per minute · cm ² .

In the present embodiment, the material papers 51 and 52 and the molding paper 53 of the filter unit 3 correspond to winding papers, respectively, but at least one of the material papers 51 and 52 and the molding paper 53 is a nanofiber sheet. Is formed by. In the example shown in FIGS. 1 and 2, since the first material paper 51 and the second material paper 52 are formed by the nanofiber sheet, the molding paper 53 is made of a material such as plain paper that has been conventionally used. It is formed using. Of course, in addition to the material papers 51 and 52, the molding paper 53 may be formed of a nanofiber sheet. The air permeability of the molding paper 53 is adjusted to such an extent that air introduced through the ventilation holes 61 of the chip paper 6 can be suitably ventilated. For example, 1000 to 30000 corea units (ml / cm ² minutes).

  By the way, the air taken in from the front end side of the tobacco part 2 or the introduction air for ventilation introduced through the ventilation hole 61 of the chip paper 6 includes foreign matters such as pollen in the air. A part of it is filtered by cigarettes when passing through the tobacco part 2, and a part is filtered by the filter part 3. However, especially for foreign matters having a small size, the exclusion efficiency by filtration is small, and there is a possibility that the smoker may suck the foreign matter together with tobacco smoke (mainstream smoke). In order to suppress such inconveniences, in the filter cigarette 1 according to the present embodiment, the first material paper 51 and the second material paper 52 are formed of nanofiber sheets.

  In other words, according to the first material paper 51 and the second material paper 52 formed by the nanofiber sheet, the fiber diameter of the nanofiber is very thin compared to the fiber diameter of the pulp that has been used in conventional winding paper. Therefore, foreign matters such as pollen in the air can be suitably filtered (removed) while ensuring the air permeability required for ventilation of tobacco smoke (mainstream smoke). That is, by making the nanofiber fibers constituting the nanofiber sheet very thin, foreign matters such as pollen that have passed through the ventilation holes 61 of the chip paper 6 can be filtered.

  Thus, it is thought that it is based on the slip flow effect which a nanofiber exhibits that air ventilation resistance can be made low, ensuring a high filtration performance. In fluid mechanics, the flow of fluid such as air and liquid usually has a property of becoming slower as it gets closer to an object. However, a nano-sized material has a phenomenon called “slip flow effect”, and the flow velocity of the fluid is hardly reduced. Therefore, in a normal filter fiber, a vortex is generated when air passes, but in the case of a nanofiber, air can be transmitted without generating a vortex. Therefore, by forming the winding paper (the first material paper 51 and the second material paper 52) of the filter unit 2 using the nanofiber sheet, high air permeability is ensured while improving the filtering performance of the foreign matter by the winding paper. be able to. Therefore, even if foreign matters such as pollen contained in the outside air pass through the ventilation holes 61 of the chip paper 6 and the molding paper 53, they can be filtered in the first material paper 51 and the second material paper 52. For this reason, it can suppress that the foreign material in introduction air mixes with tobacco smoke (mainstream smoke). That is, it is possible to suppress a smoker from sucking foreign matter such as pollen together with tobacco smoke.

  On the other hand, ventilation air used for dilution of cigarette smoke (mainstream smoke) can reduce ventilation resistance by the slip flow effect of nanofibers and ensure high air permeability. A proportion can be realized. As mentioned above, according to the filter cigarette 1 which concerns on this embodiment, it becomes possible to suppress mixing of particles, such as pollen, in tobacco smoke, ensuring favorable air permeability.

  Further, in the filter cigarette 1 according to the present embodiment, the wound paper of the filter unit 3 can ensure high air permeability while enhancing the filtration performance of foreign matters such as pollen, and therefore, the wound paper itself is passed by laser processing or the like. There is no need to provide pores. Therefore, after winding the chip paper 6 around the filter unit 3, it is not necessary to form a ventilation hole penetrating the chip paper 6 and the winding paper of the filter unit 3. Accordingly, a chip paper 6 having a hole that has a ventilation hole 61 formed in advance is prepared, and the tobacco part 2 and the filter part 3 can be integrally connected by the chip paper 6 having the hole.

Here, when opening the chip paper 6 wound around the filter unit 3, it is necessary to penetrate the chip paper 6 and the winding paper. In addition to this, recently, it is necessary to open holes according to the cigarette manufacturing speed of around 10,000 cigarettes per minute, so it is necessary to open holes with a certain level of laser output. You will be forced to grow to some extent. On the other hand, when opening a hole in the chip paper 6 in advance, there is no restriction as described above. There are various methods for opening the tip paper 6 in advance, such as an electric method, a mechanical method, and a laser method, but in any case, a finer ventilation hole 61 can be formed. Thereby, the ventilation hole 61 can be made inconspicuous on the appearance of the chip paper 6, and there is an advantage in appearance (design). As a result, it is possible to contribute to an improvement in design and a degree of freedom in design design in the filter cigarette 1. However, the ventilation hole 61 of the chip paper 6 in the filter cigarette 1 is not limited to the aspect of the present embodiment, and the chip paper 6 wound around the filter unit 3 may be opened using a laser or the like. Also in such an aspect, the air permeability required for ventilation of cigarette smoke (mainstream smoke) is ensured satisfactorily by forming the roll paper of the filter cigarette 1 with a nanofiber sheet and not opening the roll paper. Further, it is possible to obtain an effect that foreign matters such as pollen in the air can be suitably filtered (removed).

  Next, with reference to FIGS. 4-9, the modification of the filter part 3 in the filter cigarette 1 is demonstrated. In the filter cigarette 1 shown in FIGS. 1 and 2, a plurality of filter segments (filter materials) are incorporated in the filter unit 3, and the first material paper 51 that individually winds up each of the plurality of filter segments. Both the second material paper 52 and the second material paper 52 are formed of nanofiber sheets. However, the air from the ventilation holes 61 in the chip paper 6 is not evenly guided to each of the first material paper 51 and the second material paper 52. That is, more air for ventilation is guided to the material paper (winding paper) arranged so as to overlap the ventilation hole 61 out of the first material paper 51 and the second material paper 52, and the ventilation hole 61. It is considered that ventilation air is not (almost) supplied to the material paper (rolling paper) that does not overlap with the paper. And, it is not very economical to form a material paper (winding paper) that is not supplied with ventilation air from the ventilation holes 61 with a nanofiber sheet.

  Therefore, in the present modification, of the first material paper 51 and the second material paper 52, a position that overlaps with the ventilation hole 61 in the chip paper 6, that is, the material paper corresponding to the ventilation hole 61 (winding paper). Is formed by a nanofiber sheet. In the present modification, since the second material paper 52 is arranged at a position (corresponding position) where the second material paper 52 overlaps the ventilation hole 61 in the chip paper 6, the first material paper 51 and the second material paper 52. Among them, only the second material paper 52 is formed by the nanofiber sheet (in FIG. 4, NFS is shown only for 52 out of reference numerals 51 and 52). According to this, in the filter cigarette 1, foreign substances such as pollen in the air can be suitably filtered (removed) while ensuring the air permeability required for ventilation of tobacco smoke (mainstream smoke). And the manufacturing cost of the filter cigarette 1 (or cigarette filter) can be reduced.

FIG. 5 is a diagram schematically showing a cross-sectional structure of a cigarette filter according to a second modification. The filter unit 3 shown in FIG. 5 has an air permeability that has been conventionally used for the first material paper 51 and the second material paper 52 that individually wind the first filter segment 41 and the second filter segment 42, respectively. The formed paper 53 is formed of a nanofiber sheet, and is formed of a highly wound web, and the first filter segment 41 and the second filter segment 42 are integrally wound. According to this, foreign substances such as pollen that enter the filter unit 3 through the ventilation holes 61 of the chip paper 6 can be filtered and collected by the molding paper 53 formed of the nanofiber sheet. Therefore, it is possible to introduce the ventilation air into the first filter segment 41 and the second filter segment 42 after removing foreign substances from the ventilation air. As a result, it is possible to suppress foreign matters in the air taken from the ventilation holes 61 of the chip paper 6 from being mixed with tobacco smoke (mainstream smoke), and to prevent the smoker from sucking these foreign matters together with the tobacco smoke. it can.

  FIG. 6 is a diagram schematically showing a cross-sectional structure of a cigarette filter according to a third modification. In the configuration example shown in FIG. 6, a single filter segment 43 is incorporated in the filter unit 3. The periphery of the filter segment 43 is wound up by a web 54. Further, the web 54 is covered with a chip paper 6 that connects the cigarette part 2 and the filter part 3. When the filter unit 3 does not have a plurality of filter segments as in the filter unit 3 according to the present configuration example, no forming paper is disposed on the filter unit 3, so that the winding paper 54 as the material paper for individually winding the filter segments 43 is nano It is good to form with a fiber sheet. Thereby, high air permeability can be secured while enhancing the filtering performance of foreign matter by the web 54. Therefore, it can suppress that the foreign material in the air taken in from the ventilation hole 61 of the chip paper 6 is mixed with tobacco smoke (mainstream smoke), and can suppress that a smoker sucks these foreign materials with tobacco smoke. .

  FIG. 7 is a diagram schematically showing a cross-sectional structure of a cigarette filter according to a fourth modification. In the configuration example shown in FIG. 7, the first filter segment 41 (first filter material) and the second filter segment 42 (second filter material) are arranged at a predetermined interval. A space 6 is formed between them. In a space 9 between the first filter segment 41 and the second filter segment 42, a fragrance capsule 8 in which a liquid fragrance (fragrance solution) 7 is enclosed (filled) is accommodated. When this fragrance capsule 8 is crushed by a smoker by receiving an external force during smoking, it releases the liquid fragrance 7 enclosed therein. For example, when the smoker squeezes the filter unit 3 containing the fragrance capsule 8, the fragrance capsule 8 is broken, and the liquid fragrance 7 enclosed in the fragrance capsule 8 is released.

  In the fragrance capsule 8, various materials can be used for the shell (outer shell) enclosing the fragrance 7. For example, various shells commonly utilized in the pharmaceutical industry can be used, and such shells can be, for example, gelatin based or formed from a polymeric material such as modified cellulose. Good. Moreover, the fragrance | flavor enclosed with the inside of the fragrance | flavor capsule 8 is not specifically limited, A various fragrance | flavor can be applied. For example, food flavors and tobacco flavors can be used as the flavor. Examples of such perfumes include menthol, lavender, cinnamon, cardamom, celery, clove, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon, orange, mint, cinnamon skin, These are essential oils such as caraway, cognac, jasmine, chamomile, kasha, ylang ylang, sage, spearmint, fennel, himent, ginger, anise, corianda, coffee.

As shown in FIG. 7, the first filter segment 41 and the second filter segment 42 are respectively wound by the first material paper 51 and the second material paper 52 described above. Moreover, the 1st filter segment 41 and the 2nd filter segment 42 are integrally connected in the state which has arrange | positioned the fragrance | flavor capsule 8 between both by being wound up by the molding paper (winding paper) 53. FIG. In this modification, the molding paper 53 is formed by the nanofiber sheet described above. The forming paper 53 formed of the nanofiber sheet inhibits liquid from penetrating while ensuring high air permeability. Therefore, when the smoker crushes the fragrance capsule 8 at the time of smoking, or the fragrance capsule 8 is broken due to inadvertent external force during storage and storage of the filter cigarette 1, the liquid fragrance 7 released from the fragrance capsule 8 is obtained. Transmission through the molding paper 53 is suppressed. Thereby, when the fragrance | flavor capsule 8 is cracked, it can suppress that the discharged | emitted liquid fragrance | flavor 7 permeate | transmits the forming paper 53 and oozes out to the chip | tip paper 6 side. Therefore, it can suppress that the external appearance of the filter cigarette 1 worsens, and can suppress that the image of a product falls. In this modification, the first material paper 51, the second material paper 52, and the molding paper 53 are applicable as the winding paper for winding the filter segment in the filter unit 3, and at least the molding paper 53 is formed of a nanofiber sheet. It only has to be formed.

  Further, the nanofiber sheet forming the molding paper 53 may have water resistance, water repellency, oil resistance, and oil repellency as appropriate according to the type of the liquid fragrance 7 enclosed in the fragrance capsule 8. For example, when encapsulating an aqueous fragrance in the fragrance capsule 8, the formed paper 53 may be formed of a nanofiber sheet having water resistance and water repellency. Moreover, when encapsulating oily fragrance | flavor in the fragrance | flavor capsule 8, it is good to form the shaping | molding paper 53 with the nanofiber sheet | seat which has oil resistance and oil repellency. Thereby, it can suppress more reliably that the liquid fragrance | flavor 7 discharge | released from the fragrance | flavor capsule 8 oozes out to the chip paper 6 side.

  FIG. 8 is a diagram schematically showing a cross-sectional structure of a cigarette filter according to a fifth modification. In the configuration example shown in FIG. 8, a first filter segment 41 and a second filter segment 42 are arranged in the filter unit 3, and the fragrance capsule 8 is incorporated in the second filter segment 42. Yes. Further, the first filter segment 41 and the second filter segment 42 are individually wound up by the first material paper 51 and the second material paper 52. In addition, the first filter segment 41 and the second filter segment 42 are connected to each other by being integrally wound by the forming paper 53. In the present modification, the forming paper 53 is formed of a nanofiber sheet. Thereby, there exists an effect similar to the 4th modification shown in FIG. That is, the liquid fragrance 7 discharged from the fragrance capsule 8 oozes out to the chip paper 6 side while allowing air from the ventilation hole 61 of the chip paper 6 to be suitably supplied into the second filter segment 42. Can be suppressed.

  In the example shown in FIG. 8, the molding paper 53 is formed of a nanofiber sheet. However, the filter segments (in the example of FIG. 8, corresponding to the second filter segment 42) containing the fragrance capsule 8 are individually provided. The winding paper (second material paper 52) to be wound on the paper may be formed of a nanofiber sheet, and thereby the same effect as that obtained when the forming paper 53 is a nanofiber sheet can be obtained. Further, in the example shown in FIG. 8, the fragrance capsule 8 is built in the second filter segment 42, but the fragrance capsule 8 may be built in the first filter segment 41. In this case, at least one of the first material paper 51 and the molding paper 53 that winds the fragrance capsule 8 around the first filter segment 41 is formed by the nanofiber sheet, and thus is released from the fragrance capsule 8. The permeation of the fragrance 7 can be suitably suppressed. Further, the fragrance capsule 8 may be incorporated in both the first filter segment 41 and the second filter segment 42. In this case, the first raw material paper 51 and the second raw material paper 52 are formed by a nanofiber sheet or formed by a molded paper 53 nanofiber sheet, so that the perfume 7 released from the perfume capsule 8 is stained. Protruding can be suitably suppressed.

  Moreover, FIG. 9 is the figure which showed typically the cross-section of the filter for cigarettes concerning a 6th modification. In the configuration example shown in FIG. 9, a single filter segment 43 is arranged in the filter unit 3, and the filter segment 43 is wound up by a winding paper 54 (material paper). A perfume capsule 8 is incorporated in the filter segment 43. In this configuration example, the web 54 is formed of a nanofiber sheet. Thereby, like the modification shown in FIG.7 and FIG.8, the ooze of the fragrance | flavor 7 discharge | released from the fragrance | flavor capsule 8 can be suppressed suitably.

  As described above, the filter cigarette, the cigarette filter, and the web used for the cigarette filter according to the present invention have been described according to the embodiment, but the present invention is not limited to these. It is obvious to those skilled in the art that various changes, improvements, combinations, and the like are possible for the above-described embodiment. In the above-described embodiment, an example of filtering (collecting) pollen and the like by forming a web of a filter part (cigarette filter) in a filter cigarette with a nanofiber sheet has been described. Various foreign substances contained in the air that are desired to be prevented from being mixed into the smoke can be removed by the web. Moreover, the specification of the nanofiber sheet for forming the web can be changed according to the particle diameter of the target substance to be filtered (collected). For example, the filtration performance of the web (nanofiber sheet) may be changed by changing (changing) the density of the fibers in the nanofiber sheet.

  EXAMPLES Next, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to description of a following example, unless the summary is exceeded.

<Example 1>
<< Evaluation of particle permeability >>
[Create sample]
In Example 1, a sample of nanofiber sheet (winding paper) having the specifications shown in Table 1 was produced by electrospinning. The average fiber diameter of the web (nanofiber sheet) according to Example 1 was calculated by observation with an electron microscope.

<Comparative Example 1>
As the winding paper according to Comparative Example 1, paper having the specifications shown in Table 2 used as the cigarette winding paper was used. In addition, although the average fiber diameter of the web which concerns on a comparative example was computed by electron microscope observation, dispersion | variation was large and it was difficult to calculate an exact average fiber diameter.

[Evaluation methods and results]
FIG. 10 is a schematic diagram of the evaluation apparatus 100 used for the evaluation of Example 1 and Comparative Example 1. The evaluation device 100 includes a clean air supply device 101, an atomizer container 102, a scanning particle size distribution measuring device (Scanning Mobility Particle Sizer, SMPS (TSI: Model 3080 Model 3776)) 103, and a vacuum pump 104. As an outline of the evaluation method, clean air containing nanometer-order NaCl particles is passed through each web sample according to Example 1 and Comparative Example 1, and NaCl particles contained in the air before and after aeration of each web paper. Was measured for each particle size, and the particle collection efficiency of the web was calculated for each particle size from the number ratio.

  During the test, a NaCl suspension in which NaCl (manufactured by Kanto Chemical Co., Ltd .: special grade) was mixed with purified water so as to be 0.5 wt% was prepared, and the prepared NaCl suspension was put into the atomizer vessel 102. Then, clean air from the clean air supply device 101 is supplied to the atomizer container 102 into which the NaCl suspension is charged, and atomizer spraying is performed in the atomizer container 102, so that the NaCl in the NaCl suspension is used as particles. Released inside. Then, the air containing NaCl particles is sucked by the suction force of the vacuum pump 104, so that the air containing NaCl particles passes through the web set in the scanning particle size distribution measuring apparatus 103, and the upstream side and the downstream side of the web. The particle number distinct concentration on the side was measured.

The reference sign P1 in the figure indicates the measurement point of the individual particle size density on the upstream side of the web, and the reference sign P2 in the figure indicates the measurement point of the individual particle diameter density on the downstream side of the web. The air containing NaCl particles was mixed with dilution air to adjust the flow rate, and then passed through the web. In the test, a web cut out in a circular shape having a diameter of 72 mm was used, and the web was set in the scanning particle size distribution measuring apparatus 103 so that a circular portion having a diameter of 52 mm became a ventilation region. During the test, the air flow rate (air flow rate) of the air containing NaCl particles that passed through the web was 2.0 L / min. Moreover, the particle diameter of the NaCl particle | grains included in air is 20-800.
The range was nm. Then, the particle size distinct density at the upstream and downstream of the web was measured, and the collection efficiency was determined from the ratio of the particle size distinct density (upstream / downstream) measured at both.

  A graph showing the test result (particle collection efficiency) of Comparative Example 1 is shown in FIG. 11, and a graph showing the test result (particle collection efficiency) of Example 1 is shown in FIG. As shown in FIG. 11, the particle collection efficiency of the web according to Comparative Example 1 was about 35% at the maximum and about 4% at the minimum. On the other hand, as shown in FIG. 12, in the web which concerns on Example 1, the result that a particle collection efficiency can be ensured 99.9% or more over the whole range whose particle diameter is 20-800 nm is obtained. It was. From the above results, by manufacturing the cigarette filter using the web according to Example 1, particles contained in the outside air introduced into the filter through ventilation holes opened in the chip paper at the time of smoking. Can be collected with a high collection rate, and as a result, the smoker can be prevented from sucking particles contained in the outside air.

DESCRIPTION OF SYMBOLS 1 ... Filter cigarette 2 ... Cigarette part 3 ... Filter part 6 ... Chip paper 7 ... Fragrance | flavor 8 ... Fragrance capsule 41 ... 1st filter segment 42 ... 2nd Filter segment 51... First material paper (winding paper)
52 ... Second material paper (rolling paper)
53 ... Molded paper (rolling paper)
61 ... Ventilation hole

Claims (7)

A cigarette portion in which a cigarette is wound with a wrapping paper, and a filter portion connected to one end of the cigarette portion and having a filter material;
The filter section is a filter cigarette having a web formed by a nanofiber sheet that winds up the filter material. In the filter portion, a plurality of filter materials are arranged,
The winding paper includes a material paper that individually winds each of the plurality of filter materials, and a forming paper that is interconnected by integrally winding the plurality of filter materials, and at least of the material paper and the forming paper One is formed by the nanofiber sheet,
The filter cigarette according to claim 1. The cigarette part and the filter part are interconnected via chip paper, and one or a plurality of vent holes are formed in the chip paper,
Among the material papers that individually wind up each of the plurality of filter materials, a material paper corresponding to a position overlapping with the vent hole of the chip paper is formed by the nanofiber sheet,
The filter cigarette according to claim 2. In the filter unit, a capsule in which a liquid fragrance is enclosed is disposed, and a web formed by the nanofiber sheet is disposed so as to cover the side of the capsule.
The filter cigarette according to any one of claims 1 to 3. In the filter portion, the first filter material and the second filter material are arranged, and the capsule is arranged in a space formed between them,
The winding paper is interconnected by integrally winding the first filter material and the second filter material together with the material paper for individually winding the first filter material and the second filter material. Including molding paper,
At least the molding paper of the winding paper is formed by the nanofiber sheet,
The filter cigarette according to claim 4. A cigarette filter connected to one end of a cigarette portion in which a cigarette is wound with a wrapping paper,
Filter material,
Winding paper formed of a nanofiber sheet that winds up the filter material;
A cigarette filter.   A roll paper used for a cigarette filter, which is a roll paper for winding a filter material incorporated in a cigarette filter and formed using a nanofiber sheet.

Images