WO2003013287A1

WO2003013287A1 - Filter for cigarette

Info

Publication number: WO2003013287A1
Application number: PCT/JP2002/007808
Authority: WO
Inventors: Ichiro Atobe; Fumihiro Omori
Original assignee: Japan Tobacco Inc.
Priority date: 2001-08-02
Filing date: 2002-07-31
Publication date: 2003-02-20
Also published as: US20040182401A1; CN1538816A; CA2455412A1; CA2455412C; RU2260359C2; JP3905884B2; EP1413212A1; CN100367886C; JPWO2003013287A1; KR20040017356A

Abstract

A filter for cigarette having a plurality of filter sections where a plurality of filtering materials (2) are wrapped individually with winding papers (3), a shaping paper (5) for wrapping the plurality of filter sections integrally, and a chip paper for covering the shaping paper in order to produce a cigarette through connection with the cigarette part, wherein active carbon (41) and silica/alumina (42)are contained as an adsorbent in at least one of the filtering material (2) and the air gap between the filtering materials (2).

Description

Specification

Cigarette freighter

Technical field

TECHNICAL FIELD The present invention relates to an improved cigarette letter that can specifically adsorb a specific component in mainstream smoke.

Background art

For example, Japanese Unexamined Patent Publication (Kokai) No. 63-165609 discloses a deodorant (adsorbent) composed of an inorganic mineral-based porous material supporting ferrous sulfate and L-ascorbic acid. ) Is disclosed, and there is described an example in which this deodorant is added to a cigarette filter.

However, the above publication mainly aims at the adsorption of ammonia, and what mainstream smoke components are removed when the above-mentioned adsorbent is applied to a cigarette letter is completely eliminated. Not listed. Generally, it is known that the use of a filter containing an adsorbent that non-selectively adsorbs various components in mainstream smoke affects the flavor and taste of cigarettes.

An object of the present invention is to provide a cigarette filter that can selectively remove specific components in mainstream smoke while minimizing the effect on flavor and flavor.

Disclosure of the invention

The cigarette letter of the present invention includes a plurality of filter sections in which a plurality of filter media are individually wrapped by a wrapping paper, and a molded paper in which a plurality of filter sections are integrally wrapped. And a filter for a cigarette having a tip paper covering a molded paper for connecting to a cigarette portion to form a cigarette. Is characterized in that at least one of the voids between the filter media contains activated carbon and silica / alumina as an adsorbent.

The cigarette finoleter of the present invention may contain activated carbon and silica Z alumina as an adsorbent in the rolled paper or the formed paper.

The specific structure of the filter for cigarettes according to the present invention is as follows: (1) It has two filter media, and activated carbon and silica / alumina are provided in the space between the two filter media. (2) It has two filter media, and a mixture of activated carbon and silica / alumina is dispersed in one filter media. (3) It has three filter media. Activated carbon and silica alumina are individually filled in two voids between the three filter media. (4) Activated carbon is dispersed in one filter media. One in which silica Z-alumina is dispersed in one of the filter media.

Further, another cigarette finale according to the present invention is a cigarette finale having a plurality of filter media in a cigarette holder main body. It is characterized in that at least one of the voids contains activated carbon and silica / alumina as an adsorbent.

The structure of the cigarette finoletor according to the present invention is not limited to these, and various modifications are conceivable.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a diagram schematically showing a configuration of an example of a cigarette finoletor according to the present invention. FIG. 2 is a diagram schematically showing the configuration of another example of a cigarette filter according to the present invention.

FIG. 3 is a diagram schematically showing the configuration of another example of a cigarette filter according to the present invention.

FIG. 4 is a diagram schematically showing a configuration of still another example of the cigarette filter according to the present invention.

FIG. 5 is a sectional view of a cigarette honoleda to which a cigarette finoleter according to the present invention is applied.

BEST MODE FOR CARRYING OUT THE INVENTION

In the present invention, pyrazines and phenols are considered as specific components in mainstream smoke of cigarettes.

The present inventor has found that when activated carbon and silver power / alumina are used in combination as an adsorbent for a filter for cigarette, the specific components in mainstream smoke are produced due to their synergistic effects. It has been found that can be specifically removed, and the present invention has been completed.

In the present invention, acetate, paper, nonwoven fabric, and the like are used as the filter medium. As the activated carbon among the adsorbents, general Yashigara activated carbon is used. As the adsorbent, silica alumina, for example, Kyowa Kagaku Kogyo Co., Ltd., sold under the trade name of 70 OSN, is used. I can do it. This product, S i O 2 content force ^{s 6 3. 0 wt%,} A 1 2 0 3 content of force S io. 3 wt%, loss on drying is of 1 4. 5 wt%.

In the present invention, when the adsorbent is contained in the filter medium, the amounts of the activated carbon and the silica-based aluminum are about 10 mm per filter medium. Lmg to l50mg, preferably 20mg to 60mg in total amount of adsorbent, 5% in total amount of adsorbent per 5mm gap when the adsorbent is contained in the space between filter media mg to 30 mg, preferably 30 mg to 120 mg.

Hereinafter, examples of the present invention will be described.

Cigarette finolators that serve as controls

(Without adsorbent) was prepared as follows. Filament fineness: 2.2 denier, toe fineness: 400 denier acete — Two filter media (plane finolators) formed to a length of 1 Omm are prepared. A wrapping paper was wound around the filter media to form two finale sections. A gap of 5 mm was provided between the two filter media, and the paper was wound around the two filter sections without filling the gap with the adsorbent. The airflow resistance of this finale letter was 80 mmH2O (1500 ml / min).

FIG. 1 shows an example of a cigarette filter manufactured in this example. The cigarette finoletor 1 was produced as follows. Filament fineness: 2.2 denier, toe fineness: Two filter media (plane finolators) 2 prepared by molding a 40000 denier acetate to a length of 1 Omm are prepared. Wrapping paper 3 was wound around filter media 2 to form two filter sections. A space is provided between the two filter media 2, and in this space, 3 O mg of activated carbon 41 and 3 O mg of silica can be used as an adsorbent 4 (trade name: Kyo-ward 70 (SN) Formed around the two finalizer sections with the mixture filled with 42) Wound paper 5. At this time, the porosity was adjusted so that the apparent density of the adsorbent became 100%.

For reference, cigarette finolators filled with 30 mg of activated carbon alone or 30 mg of silica Z-alumina alone were also prepared as adsorbents.

Further, a filter for cigarettes filled with 60 mg of activated carbon alone or 60 mg of silica / alumina alone was prepared by doubling the amount of the adsorbent as described above.

The above cigarette filter was connected to the cigarette part where the tobacco cut was wound with cigarette paper with tape, and as shown in Table 1, various experimental cigarettes with different adsorbents were used. Lett was made. For the cigarette part, we used a roll of commercial cigarette. For these cigarettes, mainstream smoke collection experiments were performed as follows.

The cigarette was connected to an automatic smoker via a tube (Tygon). No Cambridge filter is included. The burning length was 40 mm, and the cigarette was smoked by an automatic smoker under standard smoking conditions. The mainstream smoke was collected from a smoke exhaust port into a gas bag (made by Tedlar) pre-filled with He, and adjusted with He so that the total became 8 liters. 5 OmL of gas collected from this gas bag was analyzed by gas chromatography.

Focusing on pyrazines, phenols, hydrocarbons, ketones, etc. as specific components in mainstream smoke, peak areas of specific components on gas chromatographs Data analysis was performed based on. table 1 shows the transmittance of pyrazines and phenols. The transmittance Ta of these specific components is defined as the peak area of the specific components on the gas chromatograph without an adsorbent (control), A cnt, and the adsorbent. When the peak area of a specific component on the gas chromatograph when a is used is defined as Aa,

T a = A a / A cnt

It is represented by The measured values in Table 1 were obtained based on the peak area of a specific component on a gas chromatograph.

The predicted value of the transmittance of the filter using 60 mg of activated carbon is a value obtained by squaring the measured value of the transmittance of the filter using 30 mg of activated carbon. Similarly, the predicted transmittance of a filter using silica-o-alumina 6 O mg was calculated by measuring the measured transmittance of a filter using silica-force / alumina 30 mg. It is the value raised to the power.

On the other hand, the predicted value of the transmittance when two or more adsorbents are used in combination in Table 1 is a calculated value of the transmittance predicted from the transmittance of each single adsorbent. That is, when the transmittance (actual value) of the specific component when the adsorbent a is used is Ta and the transmittance (actual value) of the specific component when the adsorbent b is used is Tb, The predicted value is expressed as (T a XT b).

If the measured value of the transmittance when two or more adsorbents are used in combination is significantly smaller than the predicted value, the specific component is specifically adsorbed, and the specific component is adsorbed. It can be determined that a synergistic effect due to the adsorbent has appeared. Table 1 shows the above results. Transmittance

Adsorbents pyrazines phenols

Actual value Predicted value Actual measured value Predicted value None 1.00 1.00

Activated carbon (30mg) 0.60 0.68

Silica / alumina (30mg) 0.73 0.61

Activated carbon (60mg) 0.38 0.36 0.38 0.46 Silica / alumina (60mg) 0.54 0.53 0.38 0.37 Activated carbon (30mg) +

Silica Alumina (30mg) Mixture of 0.22 0.44 0.30 0.41 (total 60mg) When doubling activated carbon alone or doubling silica alumina alone, There is not much difference between the measured and predicted values.

Although not shown in Table 1, the difference between the measured value and the predicted value is small for hydrocarbon ketones, and the synergistic effect of using two or more adsorbents in combination is recognized. Did not.

In contrast, as shown in Table 1, the measured values of pyrazines and phenols were much smaller than the predicted values, and activated carbon was used as the adsorbent. The combined use of silica and alumina produces a synergistic effect, indicating that these specific components are specifically adsorbed.

From the above results, it can be concluded that pyrazines and phenols can be effectively adsorbed with specific components using activated carbon alone or Zircon Z-Alumina alone. In addition, it is necessary to increase the amount of the adsorbent, which is expected to have a significant effect on flavor. Against this When activated carbon and silica-z-alumina are used in combination as adsorbents, they can effectively adsorb specific components such as pyrazines and phenols even in small amounts. The effect on flavor is expected to be small.

FIG. 2 shows another example of a cigarette flutter according to the present invention. This cigarette letter 1 is prepared by preparing three filter media (plane letters) 2 in which acetate is formed, and wrapping a paper roll 3 around each filter medium 2 to form a three letter filter. A section is formed, and activated carbon 41 and silica / alumina (trade name Kyoyo) are used as adsorbent 4 in the two gaps between the three filter media 2 on the cutting side and the suction side. One word 700 SN) 4 2 was individually filled, and the molded paper 5 was wound around three filter sections. Fig. 2 shows an example in which activated carbon 41 is filled on the suction side and silica alumina 42 is filled on the engraved side.On the contrary, silica alumina on the suction side and the engraved side are filled. Activated carbon may be filled.

FIG. 3 shows still another example of the cigarette flutter according to the present invention. This cigarette letter 1 is formed by dispersing a filter medium (plane filter) 2 formed of acete, and activated carbon 41 and silica / alumina 42 as adsorbents. Prepared acetate strength, filter media (charcoal filter) 21 are prepared, and wrapping paper 3 is wound around each filter media 2 and 21 to form two free sections. It is formed by wrapping molded paper 5 around two freight sections.

FIG. 4 shows still another example of the cigarette filter according to the present invention. This cigarette letter 1 is acetate , A filter medium (plane filter) 2 formed from, and a filter medium (charcoal filter) 21 made of acetate formed by dispersing activated carbon 41 as an adsorbent. A filter medium 22 consisting of an acetate molded by dispersing silica alumina 42 as an adsorbent is prepared, and a web 3 is wound around each of the filter mediums 2, 21 and 22. It is made up of three winding sections, and the paper 5 is wound around the three filtering sections. The arrangement of the filter medium 21 and the filter medium 22 is not limited, and either may be arranged on the cutting side.

Furthermore, in the finalizer for cigarettes according to the present invention, activated carbon and silica Z-alumina may be contained as adsorbents in the molded paper.

The cigarette finalizer according to the present invention can also be applied in the form of a cigarette holder as shown in FIG. This filter for cigarettes is provided with two filter media 2 inside a cylindrical cigarette holder body 51 having a suction port 52 formed at one end, and two filter media 2. The space between them was filled with a mixture of activated carbon 41 and silica / alumina 42 as adsorbent 4.

In the cigarette finale shown in Fig. 5, the configuration shown in Fig. 1 is applied to a cigarette holder, but the configurations shown in Figs. 2 to 4 are applied to a cigarette holder. You can do it.

Any of the cigarette filters described above specifically adsorb pyrazines and phenols due to the synergistic effect of activated carbon and silica / alumina. be able to. Industrial applicability

According to the present invention, it is possible to provide a cigarette finolator capable of selectively removing specific components in mainstream smoke while minimizing the effect on flavor and flavor.

Claims

The scope of the claims

1. A plurality of filter sections individually wrapped with roll paper, a sheet of paper that wraps multiple filter sections together, a cigarette section, In a cigarette finoleter having a tipping paper that covers the forming paper to be connected to form a cigarette, there is little gap in the filter media or between the filter media. Both of them contain activated carbon and sorbent / lumina as adsorbents, and are characterized by containing cigarette finolators.

2. The filter for cigarettes according to claim 1, wherein the wound paper or the formed paper contains activated carbon and silica alumina as an adsorbent.

3. The cigarette filter according to claim 1 or 2, wherein the filter has two filter media, and a gap between the two filter media is filled with a mixture of activated carbon and silica Z-alumina. No letter.

4. The cigarette hood according to claim 1 or 2, having two filter media, wherein a mixture of activated carbon and silica Z-alumina is dispersed in one filter media. Innovator.

5. The cigarette according to claim 1, wherein the filter has three filter media, and two spaces between the three filter media are individually filled with activated carbon and silica Z-alumina. Filter.

6. Claim 1 or 2 characterized by having three filter media, wherein activated carbon is dispersed in one filter media, and silica Z-alumina is dispersed in another filter media. The cigarette filter described.

7. In a cigarette finoletor having a plurality of filter media in the cigarette holder main body, at least one of the voids in the filter media or between the filter media includes an adsorbent and an adsorbent. A cigarette finoleter characterized by containing activated carbon and silica alumina.