TWI584744B - Filters and tobacco products for tobacco products - Google Patents

Description

Filters and tobacco products for tobacco products

The present invention relates to a filter for tobacco products and a tobacco product.

In a tobacco product with a filter in a tobacco product such as a cigarette, an electronic cigarette, a snuff, or the like, a method of changing a taste of a flavor is known: a method of disposing a fragrance-sealed flavor capsule in a filter (Refer to, for example, Patent Document 1), a method of controlling the amount of air used to dilute the main smoke stream, and the like.

[Previous Technical Literature] (Patent Literature)

Patent Document 1: Japanese Patent Publication No. 2007-520204

However, when the fragrance capsule is disposed in the filter, although the fragrance capsule is broken, the flavor taste is changed, but the method is based on the change of the delivery amount of the fragrance, and the fragrance capsule is broken. It is difficult to return the taste of the changed flavor to the original taste. In addition, control from The ratio of the air introduced into the main smoke stream (ventilation ratio) introduced by the ventilation paper of the tip paper may change the taste of the flavor, but this method is based on the change of the amount of tar and nicotine. And it is difficult to change the taste of the scent when smoking, depending on the preference of the smoker.

The present invention has been developed in view of the above problems. There is provided a technique relating to filters and tobacco products for tobacco products which can be reversibly changed at any point in time.

In order to solve the problem, the present invention provides a low-ventilation resistance portion in a portion of a cross section of the suction port end side filter medium disposed on the suction port end side of the filter, and a high-ventilation resistance portion is disposed in the remaining portion, at least the suction port is provided. In the rear end surface of the end side filter medium, the low airflow resistance portion is disposed only in a semicircular region in which the cross section of the suction port end side filter material is divided into two.

More specifically, as a first aspect of the present invention, a filter for a tobacco product comprising: a suction end end side filter member disposed on a suction port end side; and a front portion disposed on the suction port end side filter member, and The main smoke stream is filtered by the filter medium in the front stage; and the suction end side filter material has a low-ventilation resistance portion that is disposed in a portion of the cross section from the front end surface to the rear end surface and has a relatively low ventilation resistance; and the front end surface is extended from the front end surface to the rear end surface. a high-ventilation resistance portion that is disposed in the remaining portion of the cross-section and has a higher ventilation resistance than the low-ventilation resistance portion; and at least the rear end surface of the suction-end filter material, the low-ventilation resistance portion is disposed only on the suction end side The cross section of the filter material is divided into two semicircular regions. According to the present invention, it is provided that the smoker can rotate the filter centering on the long axis of the filter to enable suction A filter for tobacco products that changes to the point where the main smoke flow in the mouth touches.

Wherein, in the foregoing front section filter material and the aforementioned suction end A hollow cavity portion is provided between the side filter materials. In this way, it is possible to suppress a situation in which the main smoke flow hardly flows to a part of the cross section of the front filter material when the main smoke flows through the front filter medium. Therefore, the entire cross section (the entire cross section) of the front filter medium can be effectively utilized as a filter material as a component in the smoke.

In addition, the high ventilation resistance portion may also be composed of a single material. Formed. In this way, compared with the case where a plurality of materials are used to form the high-ventilation resistance portion, the number of processes of the filter can be reduced, and the manufacturing cost can be reduced.

Further, the suction port end side filter material is located at the front end face The intermediate portion between the rear end faces is divided into an upstream portion on the front end side and a downstream portion on the rear end side, and the upstream portion and the downstream portion are rotatable relative to each other. In this case, the upstream portion and the downstream portion are relatively freely rotatable by a slit formed on the intermediate portion of the suction port end side filter material and cut into the suction port end. The center portion of the cross section of the side filter material is formed. In this case, when the upstream portion and the downstream portion of the suction port end side filter medium are relatively rotated during smoking, the linear velocity of the main smoke flow flowing into the oral cavity of the smoker from the suction end of the filter can be changed. Therefore, the intensity of the stimulus felt when smoking can be changed.

Further, the low ventilation resistance portion may be from the aforementioned suction port The front end surface of the end side filter material is formed in a hollow portion formed to the rear end surface. By forming the low-ventilation resistance portion into a hollow portion, the smoke is not filtered in the hollow portion, so that the flow of the smoke is more likely to be more eccentric. And because the smoke is

Since the hollow portion is not subjected to filtration, it is easy to control the amount of delivery of the components in the smoke. As a result, for example, the guarantee of the product identification value becomes easy. Further, an identification means for allowing the smoker to recognize the position of the low-velocity resistance portion which is eccentrically disposed in the cross section of the suction port end side filter material may be attached to the outer peripheral surface of the filter. In this way, the smoker can easily grasp the position where the eccentricity is disposed at the low-ventilation resistance portion of the suction port end side filter material by the identification means, so that the usability in changing the taste taste in the suction tobacco product can be improved. Further, the suction end side filter medium may have a polygonal shape. Further, the present invention can also be specified as a tobacco product comprising the filter for any of the above-described tobacco products.

The means for solving the problems of the present invention are various possible combinations.

According to the present invention, it is possible to provide a filter for tobacco products and a tobacco product which can reversibly change the taste of the flavor at any time.

1, 1A‧‧‧ cigarettes

1B‧‧‧Unheated smoking articles

1C‧‧‧heated smoking articles

2‧‧‧Tobacco stick

3‧‧‧ Filter paper

4‧‧‧ filter

4B, 4C‧‧‧ mouthpiece

10B‧‧‧ chimney

21‧‧‧ cut tobacco

22‧‧‧ cigarette paper

31‧‧‧ vents

32‧‧‧ Identification mark

41‧‧‧ Front section filter

42‧‧‧empty department

43‧‧‧Sucker end side filter

43a‧‧‧ front face

43b‧‧‧ rear end face

430a‧‧‧ Midway Department

430b‧‧‧Upstream

430c‧‧‧ downstream

431, 431B to 431F‧‧‧ hollow passage

431b‧‧‧ upstream side hollow passage

431c‧‧‧ downstream side hollow passage

432‧‧‧High Ventilation Resistance

433‧‧‧ low ventilation resistance

434‧‧‧ slitting

A1‧‧‧First semicircular area

A2‧‧‧Second semicircular area

CL‧‧‧ center axis

Fig. 1 is a longitudinal sectional view showing a cigarette of the first embodiment.

Fig. 2 is an external view of the cigarette of the first embodiment.

Fig. 3 is a view showing a cross section of the mouth end side filter medium in the first embodiment.

Fig. 4A is a view for explaining a state in which the filter of the first embodiment is placed in a smoke upward posture and smoked.

Fig. 4B is a view for explaining that the filter of the first embodiment is made to smoke downward. A picture of the condition of smoking and posture.

Fig. 5 is a longitudinal sectional view showing a cigarette according to a modification of the first embodiment.

Fig. 6A is a view (1) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6B is a view (2) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6C is a view (3) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6D is a view (4) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6E is a view (5) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6F is a view (6) showing a variation of the suction end side filter medium in the first embodiment.

Fig. 6G is a longitudinal sectional view showing a cigarette according to another modification of the first embodiment.

Figure 7 is a diagram showing the control group of cigarettes of the comparative example.

Fig. 8 is a view showing the variable flavored cigarette of the embodiment.

Fig. 9 is a view showing a list of measurement results of tar, nicotine amount, and ventilation resistance of cigarettes of the examples and the comparative examples.

Fig. 10 is a graph showing the results of the sensory evaluation of the reference cigarette of the comparative example.

Fig. 11 is a graph showing the results of the sensory evaluation of the cigarette of Example 1.

Fig. 12 is a graph showing the results of the sensory evaluation of the cigarette of Example 2.

Fig. 13 is a graph showing the results of the sensory evaluation of the cigarette of Example 3.

Fig. 14 is a graph showing the results of the functional evaluation of the cigarette of Example 4.

Fig. 15 is a graph showing the results of the functional evaluation of the cigarette of Example 5.

Fig. 16 is a graph showing the results of the functional evaluation of the cigarettes of Examples 1 to 5.

Fig. 17 is a graph showing the results of the sensory evaluation of the cigarettes of Examples 7 to 10.

Fig. 18 is a view for explaining parameters of the low-ventilation resistance portion in the embodiment.

Fig. 19 is a view showing a state in which the posture of the filter is rotated by 180° around the central axis from the posture shown in Fig. 18.

Fig. 20 is a longitudinal sectional view showing the cigarette of the second embodiment.

Fig. 21 is an external view of the cigarette of the second embodiment.

Fig. 22 is a cross-sectional view showing a downstream portion of the suction end side filter medium in the second embodiment.

Fig. 23 is a view (1) showing a non-heating type smoking article of a filter for a tobacco product according to an embodiment.

Fig. 24 is a view (2) showing a non-heating type smoking article of a filter for a tobacco product according to an embodiment.

Figure 25 is a diagram showing a cross section of a mouthpiece of a non-heated smoking article.

Figure 26 is a diagram showing a heating type smoking article for a filter for a tobacco product according to an embodiment.

Hereinafter, an embodiment of the filter for a tobacco product of the present invention will be described with reference to the drawings. The dimensions, materials, shapes, relative arrangements, and the like of the constituent elements described in the present embodiment are not intended to limit the technical scope of the invention to the above description unless otherwise specified.

<Embodiment 1>

Fig. 1 is a longitudinal sectional view showing a cigarette 1 as an example of the tobacco product of the first embodiment. Fig. 2 is an external view of the cigarette 1 of the first embodiment. The cigarette 1 is provided with a tobacco rod 2 and a filter 4 that is connected to one end of the tobacco rod 2 through a tip paper 3 .

The tobacco rod 2 uses the cigarette paper 22 to wind the tobacco 21 It is also formed into a cylindrical shape (rod shape), which is also called "smoke roll". The filter 4 is a member for filtering out the smoke component contained in the main smoke stream when the main smoke flow generated by the smoker sucks the cigarette 1, and is formed into a cylindrical shape substantially the same diameter as the tobacco rod 2. .

Filter 4 can make cigarettes 1 at any time during smoking The scent tastes reversible and the variable flavor taste filter is changed. Filter 4 is made up of filter The paper 3 is packaged and connected to the rear end side of the tobacco rod 2 through the filter paper 3. The filter paper 3 is formed by integrally winding the end of the tobacco rod 2 with the filter 4 in such a manner as to connect the two together. Hereinafter, an end portion of the filter 4 on the side in which the longitudinal direction (axial direction) is connected to the tobacco rod 2 is referred to as a "front end", and an end portion on the opposite side to the front end is referred to as a "suction end (rear end)". In addition, a section in which the filter 4 is cut along the longitudinal direction (axial direction) and exposed is defined as a "longitudinal section", and a section which is cut along a direction orthogonal to the longitudinal direction (axial direction) and is exposed is defined as "Cross section". The symbol CL shown in Fig. 1 indicates the central axis of the cigarette 1 (tobacco rod 2, filter 4).

In the inside of the filter 4, the front side is arranged in order from the front end side. The segment filter 41, the cavity portion 42, and the suction port end side filter member 43. The hollow portion 42 is a hollow hollow space, and is disposed between the front filter material 41 and the suction end side filter material 43.

The front section filter material 41 is formed into a cylindrical shape by using a wrapping paper. The cellulose acetate (cellulose acetate) fiber bundle is rolled up to form a filter material. However, in the present embodiment, the filter material 41 in the preceding stage is not limited to the fiber bundle of cellulose acetate, and various materials may be used. For example, the front section filter 41 may also contain a sorbent material (e.g., activated carbon) and other additives for absorbing the smoke component of the main plume. Further, the front stage filter 41 may be formed to function as a screen for preventing the fine dust of the shredded tobacco 21 and the shredded tobacco from flowing into the suction port in addition to the filtration of the main plume. Further, the front filter medium 41 may contain a flavor material and plant leaves (for example, flavor and mint leaves).

The suction end side filter 43 is disposed at the suction end of the filter 4 Side, and the wrapping paper will be formed into a cylindrical shape and formed in the axial direction. The fiber bundle of the cellulose acetate of the empty passage 431 is rolled up to constitute a filter medium. The suction port end side filter material 43 is formed with a hollow passage 431 extending from the front end surface 43a to the rear end surface 43b.

Figure 3 is a view showing the suction end side filter medium in the first embodiment. A cross-sectional view of 43. As shown in Fig. 3, the suction port end side filter material 43 has a hollow passage 431 formed in a part of its cross section, and a high ventilation resistance portion 432 composed of a fiber bundle is formed in a part of the cross section. As shown, the hollow passage 431 has a through hole having a semicircular cross section. The hollow passage 431 is lower in ventilation resistance than the high-ventilation resistance portion 432 occupied by the formed fiber bundle, and corresponds to the low-ventilation resistance portion in the present invention. In the first embodiment, the low-ventilation resistance portion is formed as a hollow passage 431. However, a fiber bundle such as cellulose acetate having a lower ventilation resistance than the high-ventilation resistance portion 432 may be used to constitute a low-ventilation. Resistance department.

As shown in Fig. 3, the characteristics of the suction end side filter material 43 are It is disposed only in the first semicircular area A1 in which the cross section is divided into two, and is not disposed in the other second semicircular area A2. Here, the first semicircular area A1 and the second semicircular area A2 divide the cross section of the suction end side filter medium 43 into two planar regions around the central axis CL. In the example shown in Fig. 3, in the cross section of the suction port end side filter material 43, the entirety of the first semicircular area A1 is occupied by the hollow passage 431, and the entire second semicircular area A2 is entirely composed of the high ventilation resistance portion 432. occupy. Thus, the hollow passage 431 in the suction port end side filter material 43 is located only in the first semicircular area A1, so that the hollow passage 431 is on the suction port end side. The cross-sectional direction of the filter medium 43 is eccentrically arranged.

In the present embodiment, the height in the suction end side filter medium 43 is high. Since the ventilation resistance portion 432 is formed of a single material, the ventilation resistance of the high ventilation resistance portion 432 is the same in the cross-sectional direction. In other words, the ventilation resistance of the high-ventilation resistance portion 432 does not change in the cross-sectional direction.

Wherein, as shown in Fig. 2, the filter 4 is packaged The filter paper 3 is formed with a vent hole 31 for introducing peripheral air for ventilation into the filter 4 to dilute the main smoke flow. The vent hole 31 is disposed at a position corresponding to the front filter medium 41 in the filter 4 as shown in Fig. 1 . When smoking, external air flows into the filter 4 through the vent hole 31, and the air introduced from the vent hole 31 is mixed with the main smoke flow flowing into the filter 4 from the tobacco rod 2 side to dilute the main smoke stream. .

In addition, as shown in Fig. 2, at the suction end side of the filter 4 An identification mark (mark) 32 is printed on the outer surface of the filter paper 3. The identification mark 32 is used to identify the means by which the smoker recognizes the position of the hollow passage 431 which is eccentrically disposed in the cross section of the suction end side filter medium 43. In the present embodiment, the identification mark 32 is used as the identification means. However, as long as the smoker can recognize the position of the low-pressure resistance portion (the hollow passage 431), various modifications can be adopted. Examples which can be recognized by the smoker include, for example, a character printed on the outer surface of the filter paper 3 or a concave-convex process applied to the outer surface of the filter paper 3. In the present embodiment, the identification mark 32 is printed on the outer surface of the filter paper 3 in the section corresponding to the suction end side filter material 43 in the axial direction (longitudinal direction) of the filter 4, but in the filter 4 axis direction identification with the mark 32 The position is not particularly limited, and the identification mark 32 may be printed on the outer surface of the filter paper 3 in the section corresponding to the front stage filter 41 or the cavity part 42, for example. In the case where the low-ventilation resistance portion in the cross section of the suction port end side filter material 43 of the filter 4 is formed of a filter medium having a lower ventilation resistance than the high-ventilation resistance portion 432, for example, it is exemplified. In the case where the filter medium of each of the low-ventilation resistance portion and the high-ventilation resistance portion is colored differently, or only one of them is colored, or the colored paper is used as a low-velocity resistance portion. The roll paper (that is, the boundary between the low-ventilation resistance portion and the high-ventilation resistance portion) and the like. In the case where the low-velocity resistance portion in the suction port end side filter member 43 is formed by the hollow passage 431, any appropriate identification means for coloring the high-ventilation resistance portion 432 located on the periphery of the hollow passage 431 can be provided.

When the smoker smokes the cigarette 1 as described above, in the smoke The main smoke generated by the fire part of the straw 2 passes through the filter 4 and is sucked into the mouth of the smoker. The main flow of the inflow of the tobacco rod 2 into the filter 4 is sequentially sucked into the oral cavity of the smoker from the mouth end through the front filter material 41, the cavity portion 42, and the suction port end side filter material 43. At this time, the main smoke flowing into the filter 4 is a component such as tar and nicotine which are filtered out while passing through the front filter medium 41. Further, the air introduced into the outside of the filter 4 through the vent hole 31 penetrating the filter paper 3 mixes with the main smoke flow passing through the front filter medium 41 to tar, nicotine, and carbon monoxide contained in the main smoke stream. Etc.

Then, the main smoke passing through the front section filter 41 and the cavity part 42 The flow system is sucked into the suction passage 431 after flowing through the hollow passage 431 of the suction end side filter medium 43. The smoker's mouth. In the present embodiment, the suction port end side filter member 43 eccentrically arranges the hollow passage 431 in the cross-sectional direction, so that the main smoke flow can be introduced into the oral cavity of the smoker with a certain degree of directivity. Therefore, the smoker can change the posture (direction, position) of the filter 4 when the cigarette 1 is sucked, and the portion touched by the main smoke flow introduced into the oral cavity can be arbitrarily changed. Specifically, the smoker rotates the filter 4 around the long axis (central axis CL) of the filter 4 (and even if the filter 4 is rotated in the circumferential direction), the main smoke flow sucked into the oral cavity can be made. The part touched changes. In particular, in the present embodiment, the hollow passage 431 is disposed only in the first semicircular area A1 in which the cross section of the suction port end side filter medium 43 is divided into two, and is not disposed in the other second semicircular area A2. Therefore, when the smoker rotates the filter 4 around the long axis (the central axis CL), the portion touched by the main smoke flow sucked into the oral cavity can be more significantly changed.

For example, as shown in Figure 4A, to allow the suction end side filter The hollow passage 431 of 43 is oriented in a direction from the upper jaw to the throat (hereinafter referred to as "smoke up posture"), and smoking is carried out next to the filter 4, so that the main smoke flows upward into the oral cavity, mainly Direct the main smoke stream to the upper jaw. On the other hand, Fig. 4B shows a posture in which the cigarette 1 (filter 4) is reversed from the smoke upward posture shown in Fig. 4A so that the hollow passage 431 of the suction port end side filter material 43 is oriented toward the tongue. (Hereinafter, this posture is referred to as "smoke down posture") is in the state of the filter 4. When the smoke is smoked in the downward direction of the filter 4 as shown in Fig. 4B, the main smoke flow can be directed downward into the oral cavity, mainly guiding the main smoke flow to the tongue. When smoking, it becomes a change of the smoke upward posture and the smoke downward posture, which can be caused by the cigarette 1 The direction is reversed by 180° centering on the long axis of the cigarette 1 (filter 4).

There are many people in the captain who feel the scent (smell). Olfactory receptor. On the other hand, there are many taste receptors in the human tongue that are used to feel the taste. According to the cigarette 1 of the present embodiment, the smoker can rotate the filter 4 around the long axis (the central axis CL) according to his or her preference and mood, and can freely change the main smoke flow introduced into the oral cavity. The part of the arrival. That is, in the above example, smoking is performed in a state in which the filter 4 is placed in the smoke upward posture shown in Fig. 4A, and the smoker can strongly feel the fragrance or strongly feel the stimulation of the smoke on the upper jaw and the throat. (somatic sensation). On the other hand, when smoking is carried out with the smoke shown in Fig. 4B facing down the filter 4, the smoker can strongly feel the taste or strongly feel the stimulation of the tongue (skin feeling).

Further, according to the cigarette 1 of the present embodiment, even when sucking When the smoke is changed to the posture of the filter 4, the ratio of the introduction of the air introduced into the vent hole 31 of the filter paper 3 into the main smoke flow (ventilation ratio) does not change, so that the amount of tar and nicotine can be suppressed (TN amount) ). Further, the fragrance capsule is not provided in the filter 4 shown in Fig. 1. Therefore, the cigarette 1 of the present embodiment is completely different from the conventional method of changing the amount of TN during smoking and the amount of the flavor of the fragrance, and is changed in the oral cavity by changing the main smoke flow. The location of this unique method to achieve a taste of the taste. Of course, in the filter 4 of the present embodiment, the fragile fragrance capsule in which the fragrance is sealed may be disposed in the filter 4.

Moreover, according to the cigarette 1 of the present embodiment, the smoker is sucking At any point in time when the smoke is made, the filter 4 is centered on its long axis (center axis CL) When it is rotated, the position of the filter 4 can be changed. Therefore, when the main smoke stream is sucked into the oral cavity, the part of the oral cavity touched by the main smoke flow can be changed, and the taste of the flavor at the time of smoking can be enjoyed. For example, the posture of the filter 4 is changed from the smoke up posture to the smoke downward posture, and the change is made to the taste stimulation to a state larger than the aroma stimulus (hereinafter this state is called "taste strong" After the (taste rich) state, the posture of the filter 4 is returned to the smoke upward posture, and the stimulation of the aroma is increased to a state larger than the stimulation of the taste (hereinafter referred to as the state) Various smoking methods such as "aroma rich state" are acceptable. Further, since the above-described strong state of the taste and the strong flavor are converted, it is easy to switch between the smoke up posture and the smoke downward posture when smoking, so the filter according to the present embodiment is realized. The mouth 4 can be made to change the reversible taste. The so-called reversible scent taste change means that the scent taste of the cigarette 1 at the time of smoking can be freely changed between a strong taste state and a strong scent state.

As described above, the filter 4 according to the present embodiment, that is, By changing the amount of the fragrance to be delivered, the amount of tar, and the amount of nicotine during smoking, the flavor can be reversibly changed at any time. Further, in the present embodiment, the identification mark 32 is printed on the outer surface of the filter paper 3, and the smoker can easily recognize the hollow path of the eccentric arrangement of the cross-section of the suction port end side filter material 43 based on the identification mark 32. With the position of 431, it is possible to improve the usability when the taste of the cigarette 1 is changed during smoking.

Furthermore, according to the filter 4 of the present embodiment, the suction port end side The high-ventilation resistance portion 432 in the filter medium 43 is formed of a single material, which is The gas resistance is the same in the cross-sectional direction. Therefore, compared with the case where a plurality of materials are used to form the high-ventilation resistance portion 432, the number of processes of the filter 4 can be reduced, and the manufacturing cost can be reduced.

Moreover, the filter 4 of the present embodiment is configured to filter in the front section. A hollow cavity portion 42 is disposed between the material 41 and the suction end side filter material 43. According to such a configuration, the main smoke flow flowing through the entire cross section (entire area) of the front stage filter 41 can be made to flow out to the cavity portion 42 without being restricted by the flow path. Therefore, the main smoke flow can flow from the hollow portion 42 to the hollow passage 431 of the suction port end side filter material 43 while the cavity portion 42 functions as a buffer for the main smoke flow. In this way, it is possible to suppress a situation in which the main smoke flow is difficult to flow through a part of the cross section of the cross section of the front filter medium 41 when the main smoke flow passes through the front filter medium 41. In other words, the entire cross section (the entire cross section) of the front section filter medium 41 can be effectively used as the filter material as a component in the smoke. However, as in the modification shown in FIG. 5, the hollow portion 42 is not provided between the front filter member 41 and the suction end side filter member 43, and the rear end of the front filter member 41 is connected to the suction port end side filter member 43. front end.

Here, the configuration of the suction port end side filter material 43 can be various. Different patterns of change. Hereinafter, a modification of the suction port end side filter material 43 in the present embodiment will be described. Figs. 6A to 6F are views showing a modification of the mouth end side filter member 43 in the present embodiment.

The suction end side filter material 43 shown in Fig. 6A is attached The first semicircular area A1 in which the cross section of the oral end side filter medium 43 is divided into two is formed into a low-ventilation resistance portion 433 having a semicircular cross section instead of the point where the hollow passage 431 is provided, and the suction end shown in FIG. Side filter 43 different. The low ventilation resistance portion 433 has a lower ventilation resistance than the high ventilation resistance portion 432 disposed in the second semicircular region A2. In this way, the low-velocity resistance portion 433 and the high-ventilation resistance portion 432 having different ventilation resistances are provided in the cross section of the suction port end side filter material 43, and the main smoke flow flowing into the suction port end side filter material 43 is ventilated compared with the high ventilation resistance portion 432. The low-ventilation resistance portion 433 having a low resistance is sucked into the oral cavity from the mouth end. Therefore, when the posture of the filter 4 in the smoking is changed to an arbitrary posture at an arbitrary timing, the portion touched by the main smoke flow sucked into the oral cavity can be changed, and the flavor at the time of smoking can be changed.

The suction end side filter material 43 shown in Figs. 6B to 6F is Hollow passages 431B to 431F having different shapes from the hollow passages 431 shown in Fig. 3 are provided in the first semicircular area A1, respectively. The suction port end side filter material 43 shown in Fig. 6B forms a single hollow passage 431B having a circular cross section only in the first semicircular area A1. The suction port end side filter material 43 shown in Fig. 6C forms a single hollow passage 431C having a moon-shaped cross section only in the first semicircular area A1. The suction port end side filter material 43 shown in Fig. 6D forms a single hollow passage 431D having a sector shape only in the first semicircular area A1. In the illustrated example, the cross-sectional shape of the hollow passage 431D is a quarter circle (the inner angle of the hollow portion is 90°).

The suction end side filter material 43 shown in Fig. 6E is only in the first A plurality of hollow passages 431E having a semicircular shape are formed in the semicircular area A1. In the illustrated example, the three hollow passages 431E are all disposed in the first semicircular area A1. The suction port end side filter material 43 shown in Fig. 6F forms a hollow passage 431F only in the first semicircular area A1. As mentioned above, The shape, size, number, and the like of the hollow passage 431F formed in the suction end side filter medium 43 can be appropriately changed. Further, in the suction port end side filter material 43 shown in FIGS. 6B to 6F, the hollow passages 431B to 431F may be replaced with the low ventilation resistance portion formed of the filter medium having a lower ventilation resistance than the high ventilation resistance portion 432. In other words, the low-ventilation resistance portion can be formed by the hollow portion, and the high-velocity resistance portion can be formed by the filter medium having a lower ventilation resistance than the filter medium forming the high-ventilation resistance portion 432. In the case where the hollow portion is used to form the low-ventilation resistance portion as in the former, since the smoke is not filtered in the hollow portion, the flow of the smoke is more likely to be more eccentric. Moreover, since the smoke is not filtered in the hollow portion, the control of the amount of the components in the smoke becomes easy. As a result, for example, the guarantee of the product identification value becomes easy. On the other hand, when the low-ventilation resistance portion is formed by the filter material having a low ventilation resistance as in the latter case, there is an advantage that the main smoke flow is also filtered in the suction port end side filter medium 43. The shape of the suction port end side filter material 43 in the filter 4 is not limited to a cylindrical shape, and may be a polygonal shape.

Further, in the suction port end side filter material 43 of the present embodiment The hollow passage 431 (low-ventilation resistance portion) may be disposed only in the first semi-circular area A1 in which the cross-section is divided into two at least at the position of the rear end surface 43b (suction end). The hollow passage 431 (low-ventilation resistance portion) is eccentrically disposed in the first semicircular area A1 at least at the position of the rear end surface 43b (suction end) of the suction port end side filter medium 43, and the smoker appropriately surrounds the filter 4 around the long axis When the center axis CL is rotated, the portion where the main smoke flows in the oral cavity can be changed to change the taste of the cigarette 1.

Moreover, in the example shown in Fig. 1, although the mouth end is The hollow passage 431 (low-ventilation resistance portion) of the side filter member 43 is disposed in parallel along the long axis (the central axis CL) of the filter 4 from the distal end surface 43a of the suction port end side filter material 43 to the rear end surface 43b. Not limited to this. For example, in the modification shown in FIG. 6G, the long axis of the hollow passage 431 (low-ventilation resistance portion) in the suction port end side filter material 43 may be arranged to be relative to the long axis of the filter 4 (center axis CL). tilt. In the example shown in FIG. 6G, the rear end position of the hollow passage 431 (low-ventilation resistance portion) is disposed only in the first semicircular area A1 at the position of the rear end surface 43b (suction end) of the suction end side filter medium 43. . Further, at the position of the distal end surface 43a of the suction port end side filter material 43, the distal end position of the hollow passage 431 (low ventilation resistance portion) is disposed only in the second semicircular region A2. As shown in Fig. 6G, the long axis of the hollow passage 431 (low ventilation resistance portion) in the suction port end side filter material 43 is arranged to be inclined with respect to the long axis (central axis CL) of the filter 4, and the smoker can Before and after the filter 4 is rotated about the long axis (the central axis CL), the portion of the oral cavity that is in contact with the main smoke flow sucked from the rear end surface 43b (suction end) of the suction port end side filter material 43 changes more remarkably. As a result, the taste of the cigarette 1 can be more significantly changed in accordance with the preference of the smoker.

<Example>

The present invention will be more specifically described by the following examples, but the invention may be variously modified without departing from the scope of the invention.

<<Measurement of tar and nicotine and ventilation resistance>>

Here, a sample of the cigarette of the example was produced, and the amount of tar, the amount of nicotine, and the resistance to ventilation were measured. Fig. 7 is a view showing a standard cigarette (control cigarette) of a comparative example. The filter of the control group cigarette shown in Fig. 7 is a general cellulose acetate filter (hereinafter also referred to as "AF filter"), and the filter has a total length of 27 mm and an outer diameter of 7.2 mm. On the other hand, Fig. 8 is a view showing a variable flavored cigarette of the embodiment. The filter 4 of the variable-flavored cigarette is produced by connecting a cylindrical paper tube 5 at the rear end of the control group filter (AF filter), and the paper tube 5 is attached to the suction port end on the inner surface. Side filter 43. The upper part of Fig. 8 shows the type of "empty hole part", and the lower part shows the type of "no hole part".

Type with a hollow part, attached to a paper tube 5 of length 7 mm The inside surface is bonded to the mouth end side filter material 43 having a length of 5 mm by using a carboxymethyl cellulose (CMC) adhesive, and then the paper tube 5 is mounted on the rear side of the AF filter, and the rear end face of the AF filter is formed. A cavity portion 42 having a length of 2 mm is formed between the front end surface of the suction port end side filter member 43. A type having no cavity portion is formed by bonding a suction port end side filter material 43 having a length of 7 mm to the inner surface of the paper cylinder 5 having a length of 7 mm by using a CMC adhesive, and then mounting the paper tube 5 to the rear portion of the AF filter, and The rear end surface of the AF filter is joined to the front end surface of the suction end side filter medium 43 and is connected without a gap. Among them, the paper tube 5 is connected to the AF filter by a cellophane tape. The high-ventilation resistance portion 432 of the suction port end side filter material 43 is a cellulose acetate fiber of 2.2Y/44000, the low-ventilation resistance portion 433 is a cellulose acetate fiber of 8.6Y/21000, and the triacetic acid on the side of the high-ventilation resistance portion is used. The triacetin content was set to 23%.

Figure 9 shows the coke of the cigarettes of the examples and comparative examples. List of results of measurement of oil and nicotine and ventilation resistance. The first to sixth embodiments shown in Fig. 9 differ in the specifications of the suction port end side filter 43. The suction port end side filter material 43 of the first embodiment corresponds to the suction port end side filter material 43 shown in Fig. 6A, and a semicircular low-velocity resistance portion 433 is disposed in the first semicircular region A1, and high ventilation is disposed in the second semicircular region A2. The resistance portion 433. The inner diameter (diameter) of the low ventilation resistance portion 433 is 5.2 mm. Further, Embodiment 1 is only set to a type having a cavity portion.

The mouth end side filter material 43 of Embodiment 2 corresponds to the 6B The suction port end side filter material 43 shown in the drawing has a single hollow passage 431B having a circular cross section formed only in the first semicircular area A1. In addition, the inner diameter (diameter) of the hollow passage 431B is 3 mm, and the thickness dimension (hereinafter referred to as "maximum thickness of the high ventilation resistance portion") at which the thickness of the high ventilation resistance portion 432 is the smallest is 1 mm. In the second embodiment, both the type having the cavity portion and the type having no cavity portion were produced.

The mouth end side filter material 43 of the embodiment 3 corresponds to the sixth C The suction port end side filter material 43 is shown in the drawing, and a single hollow passage 431C having a monthly cross section is formed only in the first semicircular area A1. In the third embodiment, the maximum thickness of the high-ventilation resistance portion in the suction port end side filter medium 43 was 1.4 mm. In the third embodiment, the type having the cavity portion was also produced, and the type having no cavity portion was also produced.

The mouth end side filter material 43 of the fourth embodiment corresponds to the third The suction port end side filter material 43 shown in the drawing is formed with a hollow passage 431 that occupies a semicircular shape of the entire first semicircular area A1. Inner diameter of the hollow passage 431 (diameter) is 5.2 mm. Embodiment 4 is only set to a type having a cavity portion.

The suction port end side filter material 43 of the embodiment 5 corresponds to the 6D The suction port end side filter material 43 shown in the drawing has a hollow passage 431D having a sector shape only in the first semicircular area A1. The inner angle of the hollow passage 431D is 90 (quarter circle). In the fifth embodiment, the maximum thickness of the high-ventilation resistance portion in the suction port end side filter medium 43 was 1 mm. Embodiment 5 is only set to a type having a cavity portion.

The mouth end side filter material 43 of the embodiment 6 corresponds to the 6E The suction port end side filter material 43 shown in the drawing has three hollow passages 431E having a semicircular shape formed only in the first semicircular area A1. In the sixth embodiment, the minimum thickness of the high-ventilation resistance portion in the suction port end side filter medium 43 is 0 mm, and the inner diameter (diameter) of the hollow passage 431E is 1.5 mm. The embodiment 6 is only set to have a type of a cavity.

Each of the cigarettes of the above examples and comparative examples was separately Three samples were prepared, and the amount of tar, nicotine, and ventilation resistance were measured under the following conditions and environments. That is, the sample was set to an automatic smoking device (SM410 manufactured by SERULEAN) under the environment of room temperature of 22 ° C, relative humidity of 60%, and wind speed of 0.2 m / sec. Smoking was performed according to ISO standard smoking conditions (for each Burning smoking articles, repeated for a period of 2 seconds at a 58-second interval and sucking 35 mL of smoking action). The capture of the particle phase components in the main plume was carried out using a Cambridge filter (borgwaldt, 400 filter 44 mm), and the gas phase component was captured using an air bag (SUPELCO, Tedlar bag). The particle phase composition is calculated from the weight change of the Cambridge filter to calculate the TPM (microparticle component: Total) After the amount of Particular Matter), the mixture was shaken with 10 mL of isopropyl alcohol for 20 minutes, and the amount of water and nicotine was measured using GC-FID/TCD (6890N, Agilent), and the amount of tar was calculated. The measurement of the ventilation resistance was carried out by a fixed method using a ventilation resistance measuring instrument PV21 (manufactured by JTTohsi Co., Ltd.).

As shown in Fig. 9, it can be seen that the fragrances in Examples 1 to 6 There was no significant change in the amount of tar, the amount of nicotine, and the resistance to ventilation between the cigarette and the cigarette of the comparative example.

<<Functional evaluation test>>

Next, the effects related to the change in flavor at the time of smoking of the cigarette of the example were evaluated according to the following functional evaluation test. The sensory evaluation test was carried out for the above-described Examples 1 to 5 and reference cigarettes for reference. The reference cigarette is produced by the AF filter of the control group cigarette described in Fig. 7, in which the AF filter is formed to penetrate the center hole of the AF filter in the axial direction. Wherein, the central hole of the reference cigarette filter is coaxial with the central axis of the filter. Further, in the cigarettes and reference cigarettes of Examples 1 to 5 used in the present functional evaluation test, capsules in which the fragrance was sealed were disposed in the filter.

The functional evaluation system causes five evaluators (A to E) to separately pump The cigarettes and reference cigarettes of Examples 1 to 5 were evaluated for the difference in flavor taste obtained when smoking was performed by inverting the posture of the filter. When the cigarettes of Examples 1 to 5 were aspirated, the smoke upward posture shown in Fig. 4A and the smoke downward posture shown in Fig. 4B were changed to smoke. Functional evaluation The strength of the "Spirit", "Scent" and "Physical (Stimulus)" are evaluated as "very weak", "weak", "just", "strong" and "very strong". The ratio (freescale) was evaluated. Among them, in terms of the intensity of body sensation (stimulation), the evaluation is particularly performed on parts such as "shangyu", "tongue", "throat", and "respiratory tract". In the sensory evaluation test, smoking was carried out in a state in which the filter was placed in a posture in a smoke-up posture and a smoke-down posture, and the intensity of taste, aroma, and body sensation (stimulation) was evaluated. The values of the evaluation items in Figs. 10 to 15 are plotted as the average of five evaluators. The evaluation of each item was conducted based on five levels of evaluation: "weak", "weak", "just", "strong" and "very strong". In addition, "very weak" is -50, "weak" is -25, "just" is 0, "strong" is 25, and "very strong" is 50, which is felt when the filter is reversed upside down. Feel the evaluation.

Figure 10 shows the functional evaluation of the reference cigarette of the comparative example. A graph of the price results. Figures 11 to 15 are graphs showing the results of the functional evaluation of the cigarettes of Examples 1 to 5. In the graphs of Figs. 10 to 15, the graph on the left side shows the result of the sensory evaluation when the flavor capsule is broken at the time of smoking, and the graph on the right side shows the result of the sensory evaluation when the capsule of the fragrance is not broken at the time of smoking. In addition, in the figures 10 to 15, the evaluation results corresponding to the "smoke-up posture" are indicated by solid lines, and the evaluation results corresponding to the "smoke-down posture" are indicated by broken lines.

As can be seen from Fig. 10, in the reference cigarette, even if the posture of the sputum filter is reversed up and down during smoking, the body sensation of the taste, the aroma, and the upper jaw, the tongue, the throat, the respiratory tract, and the like are hardly affected. On the other hand, from the evaluation of the functions shown in Figures 11 to 15, it is known that In the cigarettes of Examples 1 to 5, the effects on the taste, the aroma, and the body sensation of the palate, the tongue, the throat, the respiratory tract, and the like are different in the aforementioned smoke-up posture and the smoke-down posture. Therefore, according to the present invention, it is understood that the taste taste reversibly changes by arbitrarily rotating the filter. In addition, there is also a tendency to cause the capsules to be broken.

Figure 16 is a comprehensive view showing the cigarettes of Examples 1 to 5 A graph of the results of the functional evaluation. As shown in Fig. 16, in the cigarettes of Examples 1 to 5, although the shape of the hollow passage in the suction port end side filter member 43 is different, the cigarette is smoked in the upward posture and smoked and smoked. There are some differences in the pattern or intensity of each evaluation item when the filter is pressed down in the downward position, but overall, a roughly corresponding result can be obtained.

That is, sucking the filter with the smoke up posture and sucking the example In the case of cigarettes, it is obtained that, in terms of body sensation, the intensity of stimulation to the upper jaw, throat, and respiratory tract is relatively strong, and the intensity of stimulation to the tongue is relatively weak. And it is obtained that, in the smoke upward posture, the intensity of the fragrance can be made stronger than the intensity of the taste.

On the other hand, smoking in the downward direction of the smoke while sucking the filter In the case of the cigarette of the example, it can be obtained that, in terms of body sensation, the intensity of stimulation to the upper jaw, throat, and respiratory tract is relatively weak, and the intensity of stimulation to the tongue is relatively strong. And it can be obtained that the intensity of the taste can be stronger than the intensity of the fragrance in the downward posture of the smoke. In addition, it is understood that the above tendency is the same as the case where the flavor capsule is broken at the time of smoking to increase the amount of the flavor conveyed, and the flavor capsule is not broken at the time of smoking.

As can be seen from the above, the filter and the device according to the embodiment The cigarette provided with the filter can change the flavor of the fragrance, the amount of tar and the amount of nicotine during smoking, and can change the taste of the flavor reversibly at any time.

Figure 17 is a view showing the cigarette 1 according to the embodiment. In the sensory evaluation test, the effect of the change in the taste taste at the time of smoking when the shape, the position, the size, the range, and the like of the hollow passage in the cross section of the filter 4 were changed as parameters was evaluated. Figure.

The suction end side filter medium 43 of the filter 4 of the embodiment 7 is As shown in Fig. 6B, a single hollow passage 431B having a circular cross section is formed only as a low-ventilation resistance in the first semicircular area A1 in the cross section formed by the first semicircular area A1 and the second semicircular area A2. unit. The suction end side filter medium 43 of the filter 4 of the embodiment 8 to 10 is the first semicircular area A1 in the cross section formed by the first semicircular area A1 and the second semicircular area A2 as shown in Fig. 6C. A single hollow passage 431C having a moon-shaped cross section is formed in the region as a low-velocity resistance portion. In the seventh to tenth embodiments, the cross-sectional area S of the low-ventilation resistance portion (the hollow passage 431B and the hollow passage 431C) of the filter 4 disposed in the first semicircular region A1, the width dimension W, the maximum distance Dmax from the boundary line, and the distance are The minimum distance Dmin of the boundary line is different.

Figure 18 is a diagram for explaining the low ventilation resistance portion of the embodiment. A diagram of each parameter. In Fig. 18, the triangular low-velocity resistance portion is taken as an example to describe the width dimension W of the low-ventilation resistance portion, the maximum distance Dmax from the boundary line, and the minimum distance Dmin from the boundary line. The sectional area S is an area formed in the low ventilation resistance portion of the first semicircular area A1. Here, The direction along the boundary line BL between the first semicircular area A1 and the second semicircular area A2 of the suction end side filter medium 43 is defined as the width direction of the low ventilation resistance portion. As shown in Fig. 18, the width dimension W of the low-ventilation resistance portion is a dimension along the direction of the boundary line BL between the first semicircular region A1 and the second semicircular region A2 in the low ventilation resistance portion.

The maximum distance Dmax from the boundary line is low ventilation resistance The distance from the boundary line BL of the portion farthest from the boundary line BL between the first semicircular area A1 and the second semicircular area A2 in the force portion, and the minimum distance Dmin from the boundary line is the distance in the low ventilation resistance portion. The distance from the boundary line BL of the portion closest to the boundary line BL between the semicircular area A1 and the second semicircular area A2. Fig. 19 is a view showing that the posture of the filter (cigarette) is rotated by 180° from the posture shown in Fig. 18 about the central axis, from the above-described smoke upward posture to the smoke downward posture, or from the smoke downward posture to A picture of the state after the smoke is up. The broken line in the figure indicates the relative position of the low-ventilation resistance portion before the switching posture.

Here, assuming that the hypoventilation resistance portion (in the seventh embodiment) The empty passage 431B) has a circular cross section with a diameter of 2 mm, a width dimension W of 2.0 mm, a maximum distance Dmax from the boundary line of 2.8 mm, and a minimum distance Dmin from the boundary line of 0.8 mm. In Comparative Example 1 shown in Fig. 17, only the position where the low-velocity resistance portion is disposed is different from that of the seventh embodiment, and the maximum distance Dmax from the boundary line is 1.6 mm, and the minimum distance Dmin from the boundary line is -0.5 mm. Here, the minimum distance Dmin from the boundary line is a negative value, which means that a part of the low-velocity resistance portion exceeds the boundary line BL between the first semicircular area A1 and the second semicircular area A2, and is disposed in the second half. The meaning of the circle area A2 side.

Next, the low-ventilation resistance portions (the hollow passages 431C) of the eighth to tenth embodiments will be described. The low-ventilation resistance portions (hollow passages 431C) of Examples 8 and 9 each have a small moon shape having a sectional area S of 5.2 mm ² and a width dimension W of 4.0 mm, but the maximum boundary line between the embodiment 8 and the embodiment 9 is The distance Dmax and the minimum distance Dmin from the boundary line are different from each other. The maximum distance Dmax of the distance boundary line with respect to Embodiment 8 is 2.1 mm, the minimum distance Dmin from the boundary line is 0.1 mm, and the maximum distance Dmax of the distance boundary line of Embodiment 9 is 2.9 mm, and the minimum distance Dmin from the boundary line It is 0.7mm. The low-ventilation resistance portion (hollow passage 431C) of the tenth embodiment has a large moon shape having a sectional area S of 7.8 mm ² and a width dimension W of 5.3 mm, and the maximum distance Dmax from the boundary line is 2.8 mm, and the minimum distance from the boundary line. Dmin is 0.1 mm. In Comparative Example 2 shown in Fig. 17, only the position at which the low-velocity resistance portion was disposed was different from that of the tenth embodiment, the maximum distance Dmax from the boundary line was 2.1 mm, and the minimum distance Dmin from the boundary line was -0.8 mm. In Comparative Example 2, the value of the minimum distance Dmin from the boundary line is also a negative value, and also indicates that a part of the low-ventilation resistance portion exceeds the boundary line BL between the first semicircular area A1 and the second semicircular area A2, and is disposed in the second semicircular area A2. Side meaning.

Here, for Examples 7 to 10, Comparative Examples 1 and 2 A sensory evaluation test was performed. In the sensory evaluation, each of the five evaluators (A to E) sucked each sample, and evaluated the difference in the taste taste of the sputum filter 4 when the posture of the sputum filter 4 was reversed and inverted. Moreover, the evaluation of each sample is strong for the taste change of the smoke when the smoke is changed in the upward posture and the smoke downward posture. Degrees were evaluated in four degrees: ◎ (very strong), ○ (strong), Δ (weak), and × (very weak).

From the evaluation results shown in Figure 17, we can see that the distance is The maximum distance Dmax of the boundary line increases, and the change in the taste taste after the transition between the smoke upward posture and the smoke downward posture becomes strong before smoking. Further, by increasing the minimum distance Dmin of the distance boundary line, the change in the flavor taste after the transition between the smoke upward posture and the smoke downward posture and before the smoking becomes strong.

For example, Example 7 borders the distance of the low-ventilation resistance portion. The maximum distance Dmax of the line and the minimum distance Dmin from the boundary line are larger than that of Comparative Example 1, and the result is that the taste taste change becomes stronger as the transition between the smoke upward posture and the smoke downward posture becomes stronger.

Further, comparing Example 8 with Comparative Example 2, it is known that In the eighth embodiment, the minimum distance Dmin of the distance line of the low-ventilation resistance portion is made larger than that of the comparative example 2, and the change in the flavor taste at the time of switching between the smoke-up posture and the smoke-down posture is obtained. Further, comparing Example 8 with Example 10, it is understood that Example 10 obtains a smoke up posture and a smoke downward posture by making the maximum distance Dmax of the distance line of the low ventilation resistance portion larger than that of the eighth embodiment. The result of the change in the taste of the scent during the transition. Further, comparing Example 9 with Example 10, it is understood that Example 9 obtains a smoke-up posture and a smoke-down posture by making the minimum distance Dmin of the distance line of the low-ventilation resistance portion larger than that of Embodiment 10. The result of the change in the taste of the scent during the transition.

Here, it is estimated that the minimum distance Dmin from the boundary line The larger, or the greater the distance Dmax from the boundary line, when smoking When the posture is changed between the smoke upward posture and the smoke downward posture, the displacement amount of the main smoke flow in the portion touched by the oral cavity is more likely to become larger, and the result is before and after the transition between the smoke upward posture and the smoke downward posture. The degree of taste change will become stronger. Further, according to the evaluation result shown in Fig. 17, it is preferable to minimize the distance of the distance of the low-ventilation resistance portion from the viewpoint of making the taste change after the transition between the smoke-up posture and the smoke-down posture become stronger. The distance Dmin is 0.1 mm or more, and more preferably 0.7 mm or more. Here, the diameter of the filter 4 used in the evaluation test is 7.2 mm, and if the value obtained by dividing the minimum distance Dmin from the boundary line by the diameter of the filter 4 is used for dimensionless, the distance from the boundary line is The ratio of the minimum distance Dmin to the filter diameter is preferably 1.4% or more, more preferably 9.7% or more. Moreover, since the minimum distance Dmin of the distance of the low-ventilation resistance portion is larger, the change of the taste taste after the transition between the smoke-up posture and the smoke-down posture becomes stronger, so the minimum distance Dmin from the boundary line and the filter The upper limit of the ratio of the diameter of the mouth may be smaller than 100%. From the above, it is understood that the ratio of the minimum distance Dmin from the boundary line to the diameter of the filter is preferably 1% or more and less than 100%, and more preferably 9% or more and less than 100%.

Again, based on making the smoke up posture and the smoke down posture From the viewpoint of the change in flavor after the transition, it is preferable that the maximum distance Dmax of the distance line of the low-ventilation resistance portion is 2.1 mm or more, and more preferably 2.8 mm or more. Further, if the value obtained by dividing the maximum distance Dmax from the boundary line by the diameter of the filter 4 is used for dimensionless, the ratio of the maximum distance Dmax from the boundary line to the filter diameter is preferably 29.2% or more. More than 38.9% is better. From the above, we can see the distance from the boundary line. The ratio of the maximum distance Dmax to the filter diameter is preferably 29% or more and less than 100%, and more preferably 38% or more and less than 100%.

<Embodiment 2>

Fig. 20 is a longitudinal sectional view showing the cigarette 1A of the second embodiment. Fig. 21 is an external view of the cigarette 1A of the second embodiment. In the following, the common components in the cigarette 1A of the second embodiment and the cigarette 1 in the first embodiment are denoted by the same reference numerals, and the detailed description will be omitted, and only the differences between the two will be mainly described.

The filter 4A of the cigarette 1A of the present embodiment has a suction end The side filter member 43 is configured such that the upstream portion 430b on the distal end side and the downstream portion 430c on the rear end side are relatively rotatable with respect to the intermediate portion 430a located between the distal end surface and the rear end surface. Specifically, the intermediate portion 430a of the filter 4A is provided with a slit 434 which is formed by cutting into a central portion of the cross section of the filter member 43 at the end of the suction port end, and the slit 434 is used as a boundary to make the upstream portion The 430b and the downstream portion 430c are relatively twisted to allow relative rotation.

The upstream portion 430b and the downstream portion of the suction port end side filter medium 43 The 430c is formed with the same hollow passage 431. In other words, the upstream portion 430b and the downstream portion 430c of the suction port end side filter material 43 are formed in the first semicircular area A1 and the other second semicircular area A2 in which the cross section of the suction port end side filter medium 43 is divided into two. The hollow passage 431 having a relatively low ventilation resistance compared with the high-ventilation resistance portion 432 is disposed only in the first semicircular region A1, and the high-ventilation resistance portion 432 is disposed in the remaining region of the cross-section. the following, The hollow passage provided in the upstream portion 430b of the suction port end side filter material 43 is referred to as "upstream side hollow passage 431b", and the hollow passage provided in the downstream portion 430c is referred to as "downstream side hollow passage 431c". Further, a paper tube 5 is adhered to the outer periphery of the downstream portion 430c of the suction port end side filter medium 43. The front end side of the paper tube 5 is overlapped on the outside of the filter paper 3 that wraps the upstream portion 430b of the suction port end side filter material 43, but the paper tube 5 and the filter paper 3 are not bonded. Further, in the present embodiment, since the upstream portion 430b of the suction port end side filter member 43 and the downstream portion 430c are relatively rotatable, the identification marks 32 are provided on the outer peripheral surfaces of both the upstream portion 430b and the downstream portion 430c.

Fig. 22 is a view showing the suction end side filter medium 43 in the present embodiment. A cross-sectional view of the downstream portion 430c. In the present embodiment, only the hollow passages 431b and 431c having a circular cross section are formed in the first semicircular area A1 of the upstream portion 430b and the downstream portion 430c of the suction port end side filter medium 43, respectively. However, as in the first embodiment, the hollow passage can have various shapes.

According to the cigarette 1A of the present embodiment, the suction end side is filtered. The downstream portion 430c of the material 43 is twisted or the like with respect to the upstream portion 430b, and the area in which the upstream side hollow passage 431b of the upstream portion 430b and the downstream side hollow passage 431c of the downstream portion 430c overlap with each other in the intermediate portion 430a can be changed (hereinafter referred to as The area of the hollow passage facing area S). The linear velocity of the main plume flowing through the downstream side hollow passage 431c in the suction port end side filter material 43 is limited by the hollow passage opposing area S. Therefore, when the cigarette 1A is smoked, the upstream portion 430b and the downstream portion 430c of the suction port end side filter material 43 are relatively rotated, and the main smoke flow flowing into the mouth of the smoker from the suction end of the filter 4A can be changed. Line speed. In other words, by reducing the opposing area S of the hollow passage, The speed of the main smoke flowing into the oral cavity during smoking can be increased, and conversely, by increasing the relative area S of the hollow passage, the speed of the main smoke flowing into the oral cavity during smoking can be reduced.

According to the filter 4A and the cigarette 1A of the present embodiment, In the same manner as in the first embodiment, the position of the filter 4A is caught during smoking, and the position at which the main smoke flow is touched in the oral cavity is changed to change the flavor. In addition, by changing the relative angle between the upstream portion 430b of the suction port end side filter material 43 and the downstream portion 430c, the linear velocity of the main smoke flow into the mouth of the smoker can be changed, and the smoking can be arbitrarily changed. The intensity of the stimulus felt.

The preferred embodiments of the present invention have been described above, but The filter for tobacco products according to the embodiment can be variously modified, improved, combined, and the like. Further, in the above-described embodiment, the case where the filter for a tobacco product of the present invention is applied to a cigarette is described as an example. However, the filter for a tobacco product of the present invention may be applied to, for example, a cigar or a small cigar. Tobacco products other than cigarettes such as cigarillo, snus, snuff, chewing tobacco, and electronic cigarettes.

Applying the filter for tobacco products of the present invention to cigarettes Examples of the outer tobacco product include the use of the mouth shape of the present invention in the non-heating type smoking article shown in Figs. 23 to 25, or the mouthpiece end of the heating type smoking device shown in Fig. 26. Side situation.

Unheated smoking sling 1B shown in Figures 23 to 25 There is a cartridge 10B in which a snuff material is housed, and a suction port 4B attached to the chimney 10B. The chimney 10B is freely attachable and detachable with respect to the suction port 4B. The chimney 10B and the suction port 4B are formed by, for example, resin molding. form. The non-heated smoking article 1B is a so-called smokeless cigarette. The snuff material is produced by, for example, mixing the pulverized tobacco leaf with the flavor and containing the flavor component of the tobacco. A lid member having a vent hole is fitted to both ends of the chimney 10B in the axial direction, and a user of the non-heating type smoking device 1B can suck air by sucking the suction port 4B. When the suction from the suction port 4B is performed, the air flowing in from the rear end of the chimney 10B comes into contact with the snuff material, allowing the user to suck the air containing the aroma of the snuff material, and the flavor of the snuff material can be tasted.

Fig. 25 shows a cross section of the suction port 4B. At the mouthpiece 4B A part of the cross section is formed with a hollow passage 431B through which the air containing the aroma of the snuff material is sucked into the oral cavity of the user through the hollow passage 431B. Similarly to all of the above-described embodiments, the hollow passage 431B is disposed only in the first semicircular area A1 in which the cross section of the suction port 4B is divided into two, and is not disposed on the other side. The second semicircular area is inside A2. The portion of the cross section of the suction port 4B in which the hollow passage 431B is not formed (that is, the non-hollow portion 432B) does not allow the air containing the aroma of the snuff material to pass. That is, the ventilation resistance of the hollow passage 431B in the cross section of the suction port 4B is much lower than that of the non-hollow portion 432B, and the air can flow only in the hollow passage 431B.

According to the suction of the non-heating type smoking article 1B configured as described above In the mouth 4B, by changing the posture of the mouthpiece 4B at the time of smoking, the portion of the air in which the inhaled aroma of the snuff material is touched can be changed, and the flavor of the snuff material can be changed.

The heating type smoking device 1C shown in Fig. 26 is for example The cigarette plug of the tobacco material is heated to generate a misty smoke containing the tobacco component, and the user can taste the smoke of the tobacco material by smoking the smoke. The heating type smoking device 1C has a body portion 10C and a suction port 4C. The suction port 4C is detachably attachable to the front end portion of the main body portion 10C, and is formed to have substantially the same structure as the suction port 4B described with reference to FIG. The pod 11 is accommodated in the front end side of the main body part 10C, and the heating part 12 which heats the accommodated pod 11 is provided. The main body portion 10C is provided with a switch 13 that can be switched on/off by a user. The user turns on the switch 13 and the heater (not shown) provided in the heating unit 12 operates to heat the pod 11. As a result, the mist-like smoke containing the tobacco component is generated in the heating portion 12, and the user can suck the smoke through the suction port 4C.

Such a heated smoking device 1C is also available with the 25th Since the suction port 4B shown in the figure has the same suction port 4C, the user can change the posture of the suction port 4C during smoking, and the smoke can be changed in the portion touched by the inhaled smoke. The shape of the suction opening of the above-mentioned suction port 4B (suction port 4C) is not limited to a circular shape, and may be a polygonal shape. For example, from the viewpoint of improving the retention, it is preferable to form the suction port 4B (the suction port 4C) into a hexagonal shape. Further, the suction port 4B (suction port 4C) is made of a resin such as plastic, and has an advantage that it can be easily formed into an arbitrary shape.

1‧‧ ‧ Cigarettes

2‧‧‧ tobacco rod tobacco rod

3‧‧‧ Filter paper

4‧‧‧ filter

21‧‧‧ cut tobacco

22‧‧‧ cigarette paper

31‧‧‧ vents

41‧‧‧ Front section filter

42‧‧‧empty department

43‧‧‧Sucker end side filter

43a‧‧‧ front face

43b‧‧‧ rear end face

431‧‧‧ hollow passage

432‧‧‧High Ventilation Resistance

CL‧‧‧ center axis

Claims (11)

A filter for a tobacco product, comprising: a suction end end side filter material disposed on a suction port end side; and a filter medium disposed in a front stage of the suction port end side filter material and filtering the main smoke flow; the suction port end side filter material has a low-ventilation resistance portion that is disposed on a portion of the cross-section from the front end surface to the rear end surface, and has a relatively low ventilation resistance; and a remaining portion of the cross-section from the front end surface to the rear end surface, and the ventilation resistance is lower than the aforementioned ventilation a high-ventilation resistance portion having a high resistance portion; and at least a rear end surface of the suction port end side filter material, wherein the low-ventilation resistance portion is disposed only at a boundary line passing through a central axis of the suction port end side filter material to make the suction port end The cross section of the side filter material is divided into two semicircular regions. The filter for a tobacco product according to claim 1, wherein a hollow cavity portion is provided between the front filter material and the suction end filter. The filter for a tobacco product according to the first or second aspect of the invention, wherein the suction port end side filter material is divided into an upstream portion on the front end side at a boundary portion from a front end surface to a rear end surface; Located at a downstream portion of the rear end side, and the upstream portion and the downstream portion are relatively rotatable relative to each other. a filter for a tobacco product according to item 3 of the patent application, wherein The upstream portion and the downstream portion are relatively rotatable by slitting, and the slit is formed in the intermediate portion of the suction port end side filter material and is cut into the center of the cross section of the filter end side leaving the suction port end side filter material Formed by the Ministry. The filter for tobacco products according to claim 1 or 2, wherein the high-ventilation resistance portion is formed of a single material. The filter for a tobacco product according to the first or second aspect of the invention, wherein the low-ventilation resistance portion is a hollow portion formed from a front end surface of the suction port end side filter material to a rear end surface. The filter for a tobacco product according to the first or second aspect of the invention, wherein the outer peripheral surface of the filter for the tobacco product is provided with a cross section for allowing the smoker to recognize the eccentricity of the filter material at the end of the suction port. The means for identifying the position of the low-velocity resistance portion. The filter for tobacco products according to claim 1 or 2, wherein the suction end side filter material has a polygonal shape. The filter for tobacco products according to claim 1 or 2, wherein a ratio of a distance from the boundary line of the portion of the low-ventilation resistance portion closest to the boundary line to the filter diameter is a ratio of a filter diameter to a filter diameter. More than 1% and less than 100%. The filter for a tobacco product according to claim 1 or 2, wherein a ratio of a distance from the boundary line of the portion of the low-air resistance portion farthest to the boundary line to the diameter of the filter is It is more than 29% and less than 100%. A tobacco product comprising the first to tenth patent applications A filter for tobacco products as described in any one of the items.