JP2001352963A - Cigarette filter and cigarette therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cigarette filter made of a cellulose filter which is friendly to the global environment and economical because of its high degradability in the environment, and further capable of maintaining a smoking taste approximately equal to that obtained with an acetate filter, and to provide a cigarette having a good appearance by using the cellulose filter. SOLUTION: This cigarette has a tobacco rod (1), a first filter section (2) comprising a filter which is made of a filter material consisting mainly of cellulose and contains polyethylene glycol as a filter additive in an amount of 1-20 wt.% based on the filter material, and a second filter section (3) comprising another filter which consists mainly of acetate fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cigarette filter for smoking cigarettes, and more particularly to a filter using cellulose which is highly degradable in a natural environment after smoking, and a cigarette having this filter.

[0002]

2. Description of the Related Art Hitherto, various materials have been proposed for cigarette filters. At present, most of filter cigarettes manufactured and sold use a filter mainly composed of acetate fiber as a filter material. It is also known to use triacetin, which is a plasticizer, and polyalkylene glycol, which is an additive for removing phenol and the like in mainstream smoke, for a filter mainly containing acetate fibers. For example, Japanese Patent Publication No. 44-29317 proposes a cigarette filter in which polyalkylene glycol and activated carbon are added to acetate fibers. However, although the acetate fiber is degradable in the environment, there is a problem that its speed is low. Further, when triacetin is used as a filter additive, an acetic acid odor may be generated in some cases. For this reason, Japanese Patent Application Laid-Open No. Hei 8-187070 discloses the use of a thermoplastic resin as a binder between acetate fibers and activated carbon.

On the other hand, a filter containing cellulose as a main component (so-called paper filter) has been proposed as a filter material. Cellulose filters are extremely excellent in degradability in the environment and have the advantage of low cost. However, when a cellulose filter is used, the taste of tobacco is significantly inferior to that obtained when an acetate filter is used. To maintain the cigarette brand, the taste must be kept constant, but there is no known cigarette filter knowledge that the taste does not change when the filter material is changed from acetate fiber to cellulose. .

Further, the cross-sectional shape of the cellulose filter is significantly uneven compared with the acetate filter, and there is a problem in appearance.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to use a cellulose filter which is eco-friendly due to its high degradability in the environment and is economical to the global environment, and which can maintain a taste almost similar to that of an acetate filter. Is to provide. Another object of the present invention is to provide a cigarette having a good appearance using a cellulose filter.

[0006]

According to the filter for cigarettes of the present invention, the filter material is mainly composed of cellulose, and at least one selected from polyalkylene glycols and derivatives thereof is used as a filter additive in a filter material. -20% by weight.

The cigarette of the present invention comprises a tobacco rod,
A first filter section composed of a cellulose-based filter as the filter material connected to the tobacco rod; and a filter mainly composed of acetate fibers as a filter material connected to the first filter section. And a second filter section.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventors have proposed a filter material,
Factors such as filter additives, components of mainstream smoke before and after filtration, and the like were analyzed. As a result, when cellulose is used as the filter material and when acetate fiber is used, there is a large difference in the semi-volatile (semi-volatile) component in the mainstream smoke after the filter filtration, and there is a large difference in the taste. It was speculated that this was one of the reasons. Further investigation revealed that the semi-volatile component in the mainstream smoke after filter filtration greatly changed depending on the type and concentration of the filter additive. It is known to those skilled in the art that the taste is not necessarily determined only by the components and their concentrations in mainstream smoke, but it is doubtful that the concentration of the semi-volatile component is one of the factors in the taste. There is no room.

[0009] The cigarette filter of the present invention uses a polyalkylene glycol (including a derivative) as an additive for removing semi-volatile components and the like in a mainstream smoke, wherein the filter material is mainly composed of highly degradable cellulose. By adjusting the amount of addition, the same filtration characteristics as those of acetate can be obtained. Cellulose is a highly degradable material in the environment, such as paper, rayon, and cotton. Of these, wood pulp is preferable for processing. Further, a dry nonwoven fabric of wood pulp, which is a cellulose, is rolled up by a special method, and a filter known in Japan as "Neofilter" may be used.

[0010] Among the polyalkylene glycols and derivatives thereof as additives, it is preferable to use polyethylene glycol. The addition amount is preferably 1 to 20% by weight based on the filter material.

Activated carbon may be added to the cellulose filter. The amount of activated carbon to be added is 10-20 per piece
It is preferably 0 mg.

[0012] Further, by connecting a cellulose filter (first filter section) to the tobacco rod and connecting an acetate filter (second filter section) to the filter surface of the cellulose filter opposite to the tobacco rod. It is possible to provide a cigarette excellent in the beauty of the cross section.

FIG. 1 schematically shows such a cigarette. As shown in FIG. 1, a tobacco rod 1 is provided with a cellulose filter (first filter section) 2 and an acetate filter (second filter section) 3.
Are connected in this order. This cigarette shows a good appearance because the cross section of the acetate filter 3 is visible.

[0014]

Embodiments of the present invention will be described below.

Examples 1 to 13 and comparative examples 1 to be described later.
Various filters as in Example 3 were prepared. All filter lengths were 25 mm. Cigarettes connected to each filter were prepared using a commercially available tobacco rod with a tar value of 17 mg, and subjected to the following measurements. The same measurement was performed for a cigarette without a filter as a reference, and the smoking length at the time of smoking was adjusted to the cigarette with a filter.

(1) Measurement of tar and nicotine The amounts of tar and nicotine are determined according to ISO 4387, 103
15, 10362-1.

(2) Semivolatile components (phenol,
Measurement of Furfural, 3-Methylpyridine) Eight cigarettes were smoked under standard smoking conditions, and mainstream smoke was collected on a glass fiber filter. The smoke component collected on the glass fiber filter was extracted with an extraction solvent (mixed solvent of dichloromethane and methanol at a volume ratio of 4: 1) containing an internal standard substance (ethyl phenylacetate), and extracted with a gas chromatography sample. did. The measurement was repeated five times.

The conditions for gas chromatography are as follows. Apparatus: Hewlett-Packard Company, 6890 series Column: J & W DBWAX fused silica capillary column, inner diameter 0.25 mm, length 30 m, film thickness 0.25
μm Temperature program: 50 ° C. → 240 ° C. (2 ° C./min) Sample inlet temperature: 250 ° C. Carrier gas: He (1 mL / min, split ratio 2)
0: 1) Detector: FID (3) Selective filtration index The selective filtration index is the concentration ratio of the smoke component before and after the filter. That is, the value obtained by dividing the amount of smoke component per cigarette by the amount of smoke component per cigarette without a filter is defined as the filter transmittance of each smoke component, and the ratio between the tar transmittance and each smoke component transmittance is calculated. Select the filtration index. Therefore, the selective filtration index (Sx) is represented by the following equation (ML Reynolds, 1978, Recent Advances in Tobacco
Science 4, p. 47).

Sx = (Wx / Wt) / (W′x / W′t) = (1−Et) / (1−Ex) where W is the weight of the smoke component before filtration, and W ′ is after the filtration. Is the weight of the smoke component, E is the filter filtration rate (1-E is the filter transmittance), the subscript x indicates the component x, and the subscript t indicates the tar.

By calculating the selective filtration index, it is possible to simply compare the filtration characteristics of a plurality of filters having different tar filtration rates, and to easily evaluate whether each component is easily removed selectively. it can. If the selective filtration index is 1, it indicates that it is filtered to the same degree as tar.
If the selective filtration index is greater than 1, it indicates that it is easier to remove selectively than tar.

(4) Evaluation of flavor and taste Evaluation was performed on a 10-point scale using a specialized panel.

Example 1 A polyethylene filter (average molecular weight: 600) was sprayed at 5.7% with respect to the weight of a raw material when a paper filter was wound to prepare a filter.

Example 2 A filter was prepared by spraying 10.5% of polyethylene glycol (average molecular weight: 600) with respect to the weight of the raw material when the paper filter was wound.

Example 3 A filter was prepared by spraying 13.3% of polyethylene glycol (average molecular weight: 600) with respect to the weight of the raw material when the paper filter was wound.

Example 4 A polyethylene filter (average molecular weight: 600) was spray-added at 19.3% of the weight of a raw material when a paper filter was wound to prepare a filter.

Example 5 A paper coated with 19.3% polyethylene glycol (average molecular weight: 20,000) based on the weight of the material was creped on a paper and wound up to produce a filter.

Example 6 A filter was prepared by spraying 8.7% of polypropylene glycol (average molecular weight: 1000) with respect to the weight of the raw material when the paper filter was wound.

Example 7 A filter was prepared by creping a roll of paper coated with 10.0% of polyoxyethylene monostearate based on the weight of the material and rolling up the roll.

Example 8 A filter was prepared by spraying 11.1% of polyethylene glycol (average molecular weight: 600) with respect to the weight of the raw material when the neofilter was wound.

Example 9 A filter was prepared by spraying 11.4% of polypropylene glycol (average molecular weight: 1000) with respect to the weight of the raw material when the neofilter was wound.

Example 10 A filter was prepared by spraying 12.2% of polyethylene glycol (average molecular weight: 600) with respect to the weight of a material when a paper filter was wound.

Example 11 A filter was prepared by spraying 5.1% of polypropylene glycol (average molecular weight: 1000) with respect to the weight of a raw material when a paper filter was wound.

Example 12 A polyethylene filter (average molecular weight: 600) was spray-added at 6.2% to the weight of a raw material when a neofilter was wound to prepare a filter.

Example 13 A filter was prepared by spraying 9.5% of polypropylene glycol (average molecular weight: 1000) with respect to the weight of the raw material when the neofilter was wound.

Comparative Example 1 Commercially available acetate filter (plasticizer added with 6.0%)
Was used.

Comparative Example 2 A paper filter wound with crepe wound on paper was used.

Comparative Example 3 A commercially available neofilter was used.

Table 1 shows the selective filtration index, and Table 2 shows the flavor evaluation. As shown in Table 1, the selective filtration index of a paper filter (Examples 1 to 7) or a neofilter (Examples 8 and 9) to which a polyalkylene glycol or a derivative thereof is added as in Examples 1 to 9 is as follows: It shows a value closer to the selective filtration index of the acetate filter than that without addition (Comparative Example 2 or 3). As shown in Table 2, the taste evaluation of paper filters (Examples 10 and 11) or neofilters (Examples 12 and 13) to which polyalkylene glycol was added as in Examples 10 to 13 was not added. The results were better than those without (Comparative Example 2 or 3).

In the case of a paper filter, the best overall results were obtained when the amount of polyethylene glycol added was 10 to 15% by weight. On the other hand, in the case of a neofilter, the amount of polyethylene glycol added is 1 to
The best overall results were obtained at 10% by weight.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

As described above in detail, according to the present invention, a cigarette which can use an economical cellulose filter which is friendly to the global environment because of its high degradability in the environment and can maintain a taste almost similar to that of an acetate filter. And a cigarette having a good appearance using a cellulose filter.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cigarette according to the present invention.

[Explanation of symbols]

 1: Tobacco rod 2: First filter section 3: Second filter section

Claims (4)

[Claims] 1. A filter material comprising cellulose as a main component, and at least one selected from polyalkylene glycols and derivatives thereof as a filter additive is added in an amount of 1 to 20% by weight based on the filter material. Filter for cigarettes. 2. The cigarette filter according to claim 1, wherein said filter material is made of wood pulp. 3. The cigarette filter according to claim 1, wherein the filter additive is polyethylene glycol. 4. A tobacco rod, a first filter section comprising the filter according to claim 1 connected to the tobacco rod, and an acetate fiber as a filter material connected to the first filter section. And a second filter section comprising a filter mainly composed of: