KR20040017356A - Filter for cigarette - Google Patents

Abstract

A plurality of filter sections in which the plurality of filter media 2 are individually wrapped in the take-up paper 3, a molded paper 5 in which the plurality of filter sections are integrally wrapped, and a molded paper in order to make a cigarette by connecting the cigarette section. In a cigarette filter having chip paper, activated carbon 41 and silica / alumina 42 are contained as an adsorbent in at least either one of the filter medium 2 or the gap between the filter mediums 2.

Description

Cigarette Filters {FILTER FOR CIGARETTE}

For example, Japanese Patent Laid-Open No. 63-160659 discloses a deodorant (adsorbent) composed of an inorganic mineral porous body carrying ferrous sulfate / L-ascorbic acid, and an example in which the deodorant is added to a filter for cigar cigarettes. .

However, the publication mainly aims at adsorption of ammonia, and it does not describe what mainstream smoke components are removed when the adsorbent is applied to a cigarette filter. In general, in the case of using a filter containing an adsorbent for non-selectively adsorbing various components in the mainstream smoke, it is known to affect the flavor of cigarettes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cigarette filter which can minimize the influence on flavor and can selectively remove specific components in the mainstream smoke.

The present invention relates to an improved cigarette filter that can specifically adsorb specific components in the mainstream smoke.

1 is a view schematically showing the configuration of an example of a cigarette filter according to the present invention.

2 is a diagram schematically showing the configuration of another example of a cigarette filter according to the present invention;

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

4 is a view schematically showing the configuration of still another example of a cigarette filter according to the present invention;

5 is a cross-sectional view of a cigarette holder to which a filter for cigarettes according to the present invention is applied.

Best Mode for Carrying Out the Invention

In the present invention, attention is paid to pyrazines and phenols as specific components in the mainstream smoke of cigarettes.

MEANS TO SOLVE THE PROBLEM This inventor discovered that the specific component in mainstream smoke can be specifically removed by these synergistic effects, when activated carbon and silica / alumina are used together as an adsorbent of a cigarette filter, and this invention was completed.

In the present invention, acetate, paper, nonwoven fabric or the like can be used as the filter medium. As activated carbon in an adsorbent, general Yashigar activated carbon etc. are used. As the silica / alumina in the adsorbent, for example, one commercially available from Kyowa Chemical Co., Ltd. under the trade name of Kyowado 700SN can be used. This product has a SiO ₂ content of 63.0 wt%, an Al ₂ O ₃ content of 10.3 wt%, and a loss of drying of 14.5 wt%.

In the present invention, the amount of activated carbon and silica / alumina is 1 mg to 150 mg, preferably 20 mg to 60 mg, based on the total amount of the adsorbent per 10 mm of the filter medium when the adsorbent is contained in the filter medium. The total amount of adsorbent per 5 mm is set to 5 mg to 300 mg, preferably 30 mg to 120 mg.

Hereinafter, embodiments of the present invention will be described.

A cigarette filter (with no adsorbent) serving as a control standard (control) was produced as follows. Two filter media (plane filters) were formed by molding acetate having a filament fineness of 2.2 denier and a toe fineness of 40000 denier into a length of 10 mm, and winding the wound around each filter medium to form two filter sections. A 5 mm pore was provided between the two filter media, and the molded paper was wound around the two filter sections without filling the pores with an adsorbent. The airflow resistance of this filter was 80 mmH ₂ O (1050 mL / min).

In FIG. 1, an example of the cigarette filter produced in the present Example is shown. This cigarette filter 1 was produced as follows. Two filter media (plain filter) 2 in which acetate of filament fineness 2.2 denier and tow fineness 40000 denier were formed to a length of 10 mm were prepared, and the winding paper 3 was wound around each filter medium 2, A filter section was formed. A pore is provided between the two filter media 2, and the pore is filled with a mixture of 30 mg of activated carbon 41 and 30 mg of silica / alumina (trade name Kyowado 700SN) 42 as the adsorbent (4). The molded paper 5 was wound around two filter sections. In this case, the voids were adjusted so that the apparent density of the adsorbent was 100%.

For reference, a cigarette filter filled with 30 mg of activated carbon alone or 30 mg of silica / alumina alone as an adsorbent was also produced.

In addition, a cigarette filter filled with 60 mg of activated carbon alone or 60 mg of silica / alumina alone was prepared using the adsorbent as the above-mentioned amount.

The above-mentioned cigarette filter was connected to the cigarette part wound around the cigarette paper by tape, and as shown in Table 1, various experimental cigarettes having different adsorbents were produced. In the cigarette section, a commercial cigarette roll was used. About these cigarettes, the mainstream smoke collection experiment was done as follows.

A cigarette was connected with the automatic smoking machine through the tube (Tigon). Cambridge filter was not added. The cigarette was smoked by an automatic smoking machine under standard smoking conditions with a combustion length of 40 mm. The mainstream smoke was collected in a gas bag (Tedraze) in which He was put in advance from the smoking exhaust system, and adjusted to He so as to have a total of 8 liters. 50 mL of gas collected from this gas bag was analyzed by gas chromatography.

As specific components in the mainstream smoke, attention was given to pyrazines, phenols, hydrocarbons, ketones, and the like, and data analysis was performed based on the peak area of the specific components on gas chromatography. Table 1 shows the transmittances of the pyrazines and phenols. The transmittance Ta of these specific components is defined as the peak area of the specific component on the gas chromatography using gas and the adsorbent a is the peak area of the specific component on the gas chromatography in the absence of an adsorbent (control). ,

Ta = Aa / Acnt

Is displayed. In Table 1, the measured value is calculated | required based on the peak area of the specific component on gas chromatography.

In addition, the predicted value of the transmittance | permeability of the filter using 60 mg of activated carbon is the value of the square of the actual value of the transmittance | permeability of the filter using 30 mg of activated carbon. Similarly, the predicted value of the transmittance | permeability of the filter using 60 mg of silica / alumina is the value of the square of the actual value of the transmittance | permeability of the filter using 30 mg of silica / alumina.

In addition, as a predicted value of the transmittance | permeability at the time of using 2 or more types of adsorbents together in Table 1, it is a calculated value of the transmittance | permeability estimated from the transmittance | permeability of an individual adsorbent, respectively. That is, when the transmittance | permeability (actual value) of the specific component when using the adsorbent a is made into Ta, and the transmittance | permeability (actual value) of the specific component when using the adsorbent b as Tb, the predicted value is represented by (Ta x Tb).

And when the measured value of the transmittance | permeability at the time of using 2 or more types of adsorbents together is remarkably smaller than the predicted value, it can be judged that the specific component is specifically adsorbed and the synergistic effect by 2 or more types of adsorbents appears. The above result is written together in Table 1.

When activating carbon alone is doubled and when silica / alumina alone is doubled, there is no difference between the measured value and the predicted value.

Although not shown in Table 1, the difference between the measured value and the predicted value was small in hydrocarbons and ketones, and a synergistic effect was not found by using two or more kinds of adsorbents in combination.

On the other hand, as shown in Table 1, in the pyrazines and phenols, the measured value is considerably smaller than the predicted value, and synergistic effect is obtained by using activated carbon and silica / alumina as the adsorbent, and these specific components are specifically adsorbed. It can be seen that.

From the above results, it is expected that the amount of the adsorbent needs to be further increased when activated carbon alone or silica / alumina alone is used to effectively adsorb specific components such as pyrazines and phenols, which greatly affects the flavor. On the other hand, when activated carbon and silica / alumina are used together as an adsorbent, it is anticipated that the specific components, such as pyrazine and phenol, can be adsorb | sucked effectively even in a small amount, and the influence on flavor is small.

2 shows another example of the cigarette filter according to the present invention. This cigarette filter 1 prepares three filter materials (plane filter) 2 in which acetate was molded, and wound up the winding paper 3 around each filter material 2 to form three filter sections. Then, two pores on the flesh side and the inlet side between the three filter media 2 are individually filled with activated carbon 41 and silica / alumina (trade name Kyowado 700SN) 42 as the adsorbent 4, 3 Molded paper 5 is wound around two filter sections. In FIG. 2, although the example which filled the activated carbon 41 on the inlet side and the silica / alumina 42 on the inlet side is shown, you may charge silica / alumina on the inlet side, and activated carbon on the inlet side.

3 shows another example of the cigarette filter according to the present invention. The cigarette filter 1 is a filter material (charcoal filter) composed of acetate-shaped filter material (plane filter) 2 and acetate formed by dispersing activated carbon 41 and silica / alumina 42 as an adsorbent ( 21), the winding paper 3 is wound around each of the filter media 2, 21 to form two filter sections, and the molded paper 5 is wound around the two filter sections.

4 shows another example of the cigarette filter according to the present invention. The cigarette filter 1 comprises a filter material (plane filter) 2 formed of acetate, a filter material (charcoal filter) 21 made of acetate formed by dispersing activated carbon 41 as an adsorbent, and silica / adsorbent. A filter medium 22 made of acetate formed by dispersing the alumina 42 was prepared, and the winding paper 3 was wound around each filter medium 2, 21, 22 to form three filter sections. Molded paper 5 is wound around two filter sections. The arrangement of the filter medium 21 and the filter medium 22 is not limited, and either may be arranged on the flesh side.

Further, in the cigarette filter according to the present invention, activated carbon and silica / alumina may be included in the forming paper as an adsorbent.

The cigarette filter according to the present invention can also be applied in the form of a cigarette holder as shown in FIG. 5. The cigarette filter is provided with two filter media 2 inside the cylindrical cigarette holder main body 51 having an inlet 52 formed at one end thereof, and an adsorbent (2) in the gap between the two filter media 2. 4), a mixture of activated carbon 41 and silica / alumina 42 is filled.

Although the filter of FIG. 5 applies the structure of FIG. 1 to a cigarette holder, the structure of FIGS. 2-4 can also be applied to a cigarette holder.

In any of the above-described cigarette filters, pyrazines and phenols can be specifically adsorbed by synergistic effects of activated carbon and silica / alumina.

The cigarette filter of the present invention comprises a plurality of filter sections in which a plurality of filter materials are individually wrapped in a wrapping paper, a molded paper in which the plurality of filter sections are integrally wrapped, and a chip which covers the molded paper in order to make a cigarette by connecting the cigarette section. A cigarette filter having a paper, characterized in that activated carbon and silica / alumina are contained in at least one of the filter medium or the gap between the filter mediums as an adsorbent.

The cigarette filter of the present invention may contain activated carbon and silica / alumina as adsorbents in the winding paper or the molding paper.

As a specific structure of the cigarette filter which concerns on this invention, it is (1) having two filter media, and filling the space | gap between two filter media with a mixture of activated carbon and silica / alumina, (2) having two filter media, 1 Dispersing a mixture of activated carbon and silica / alumina in two filter media, (3) having three filter media, separately filled with activated carbon and silica / alumina in two pores between the three filter media, and (4) three It has a filter medium, the activated carbon disperse | distributed in one filter medium, and the silica / alumina disperse | distributed in another filter medium, etc. are mentioned.

In addition, another cigarette filter according to the present invention is a cigarette filter having a plurality of filter media in a cigarette holder, wherein at least one of the filter media or the pores between the filter media includes activated carbon and silica / alumina as an adsorbent. It is characterized by containing.

In addition, the structure of the cigarette filter according to the present invention is not limited to these, and various modifications may be considered.

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

Claims (7)

In a cigarette filter having a plurality of filter sections, each wrapped with a plurality of filter mediums individually wrapped, a molded paper in which the plurality of filter sections are integrally wrapped, and a chip paper covering the molded paper to make a cigarette by connecting the cigarette section to a cigarette; And at least one of the pores in the filter medium or the filter medium contains activated carbon and silica / alumina as adsorbents. The cigarette filter according to claim 1, wherein activated carbon and silica / alumina are contained as adsorbents in the winding paper or the molding paper. The cigarette filter according to claim 1 or 2, comprising two filter media and filled with a mixture of activated carbon and silica / alumina in the voids between the two filter media. The cigarette filter according to claim 1 or 2, comprising two filter media, wherein a mixture of activated carbon and silica / alumina is dispersed in one filter media. The cigarette filter according to claim 1 or 2, wherein the filter has three filter media, and two pores between the three filter media are individually filled with activated carbon and silica / alumina. The cigarette filter according to claim 1 or 2, comprising three filter media, activated carbon dispersed in one filter media, and silica / alumina dispersed in another filter media. A cigarette filter having a plurality of filter media in a cigarette holder body, wherein the filter for cigarettes comprises activated carbon and silica / alumina as an adsorbent in at least one of the pores between the filter media and the filter media.