WO2003037114A1

WO2003037114A1 - Filter for cigarette and cigarette with filter

Info

Publication number: WO2003037114A1
Application number: PCT/JP2002/010989
Authority: WO
Inventors: Michihiro Inagaki; Kazuhiko Katayama; Takako Ikeda
Original assignee: Japan Tobacco Inc.
Priority date: 2001-10-30
Filing date: 2002-10-23
Publication date: 2003-05-08
Also published as: KR20040058205A; TWI243026B; EP1442667A4; CA2464149A1; RU2004116341A; UA75987C2; EP1442667A1; JP3910175B2; CN1578631A; JPWO2003037114A1; US20040200490A1; CN1284492C; RU2264767C2; KR100607539B1

Abstract

A filer for cigarette which has two or more filter sections selected from among a filter section having a liquid fatty acid or a liquid ester of a fatty acid, each having a viscosity of 1 to 300 cP, incorporated therein, a filter section having a glycol having a viscosity of 1 to 300 cP incorporated therein, and a filter section having activated carbon incorporated therein.

Description

Specification

Cigarette filters and cigarettes with filters

The present invention relates to a filter for cigarettes and a cigarette with a filter, and more particularly to a cigarette, which can efficiently filter mainstream tobacco smoke during cigarette smoking to improve tobacco taste. The present invention relates to a filter for cigarettes and a cigarette having such a filter.

Background art

In recent years, additives have been added to cigarette filters for the purpose of improving the efficiency of filtering mainstream smoke from tobacco or improving the taste of tobacco. ing. In particular, the filter for cigarettes, in which activated carbon (charcoal) is added to the filter fibers, accounts for more than half of the filters for cigarettes with filters in the Japanese market. In some parts of the world, it is customary to smoke cigarettes through water before smoking. However, the taste of cigarette smoke is changed when water is used to filter cigarette smoke. Japanese Patent Application Laid-Open No. 63-2746474 discloses that water is supplied to a cigarette filter. Examples of addition are disclosed. In addition, Japanese Patent Publication No. 44-29331 discloses a tobacco filter comprising activated carbon and polyalkylene glycol added to cellulose acetate fiber tow at a specific ratio. JP-B-46-129957 discloses a filter for tobacco, which is obtained by adding various fats and oils and a sorbin derivative to a filter material. However, although the effect on tobacco taste due to the tobacco filler additives may be detectable sensuously, the filtration rate of each component in the mainstream smoke of baco is not scientifically evident. For this reason, most of the above additives are not used in the commercially available evening baco filters. As a filter for tobacco, a filter made by adding activated carbon, which is said to remove vapor components other than permanent gas through a large number of pores, to fibers, and an activated carbon Unfiltered acetate fiber and paper filters are used only in commercial octopus.

At this point, the addition of activated carbon is an effective means to increase the filtration efficiency of the vapor phase components in mainstream tobacco smoke, but at the initial stage of smoking, tar in the mainstream tobacco smoke causes activated carbon pores. As the cigarette 1 is blocked and the adsorption activity is lost, the filtration rate of the vapor phase component in the mainstream smoke per cigarette 1 per se decreases gradually from the beginning of smoking to the end of smoking. Also, if a large amount of activated carbon is added to the filter to avoid this, the taste of tobacco may not only be deteriorated by the activated carbon odor, but also economically disadvantageous.

Accordingly, an object of the present invention is to provide a cigarette filter that can efficiently filter mainstream tobacco smoke for each component.

Disclosure of the invention

The present inventors have prepared cigarettes using a filter to which various additives have been added in order to solve the above-mentioned problems, and analyzed the mainstream smoke before and after passing through the filter. Additive It was found that the filtering components of mainstream tobacco smoke differed significantly depending on the type. As a result of reviewing the results, liquid fatty acids having low viscosity, that is, having a viscosity of 1 to 300 cP (lauric acid, oleic acid, linoleic acid, linolenic acid, etc.) were added. The filter is effective for the overall filtration of mainstream tobacco smoke and is a low-viscosity liquid fatty acid ester having a viscosity of 1 to 300 cP (such as olive oil, Filled with natural oils and fats such as castor oil, rapeseed oil, corn oil, safflower oil, and bud seed oil), Yuichi easily filters low-polarity components in mainstream tobacco smoke and highly polar components. Filtration is difficult to filter, and the addition of low-viscosity, ie, glycol (polyethylene glycol, propylene glycol, etc.) with a viscosity of 1 cP to 300 cP, tobacco Mainstream smoke easily filters high-polarity components and low-polarity components It was bitter this Togawaka'. The vapor pressure of the components in the mainstream tobacco smoke absorbed by these additives is 1 to 400 Pa, while the components in the mainstream tobacco smoke adsorbed by activated carbon are The steam pressure was 100-10000 Pa, and both were different.

Furthermore, even if the above-mentioned fatty acid or fatty acid ester and glycol are added to the same filter, the filtration rate of mainstream tobacco smoke is not improved, and the filtration effect is unstable. It was also found that if additives such as fatty acid ester and dalicol were blended and added to the filter overnight, the additives were attached to the activated carbon and the filtration rate of mainstream tobacco smoke was reduced. .

Therefore, in the present invention, tobacco filters are divided into two or more sections. Each section was divided into different sections, and a different type of additive (mainstream smoke remover) was added to each section. As a result, the mainstream tobacco smoke is filtered for each component by each section, and high-efficiency mainstream smoke filtration can be achieved.

That is, according to the present invention, the following three file sections (A) to (C):

(A) Liquid fatty acid ester having a viscosity of l to 300 cP or a filter section to which liquid fatty acid is added

(B) Final letter section to which glycol having a viscosity of l to 300 cP is added.

(C) Filter section with activated carbon

Of these, a filter for cigarettes is provided that is characterized by having two or more filter sections.

When the filter for cigarettes of the present invention comprises the filter section (A), it is preferable to use olive oil as an additive because the flavor of tobacco smoke is improved. In addition, when the cigarette filter of the present invention is provided with the file filter section (B), it is particularly preferable to use propylene glycol as glycol. The filtration rate of highly polar components in mainstream tobacco smoke is improved. When the cigarette filter of the present invention has a filter section (C), the filter section (C) is composed of the filter section (A) and the Z or filter section. It is preferable to arrange it downstream of the section (B).

The cigarette filter of the present invention can include a plane filter at the most downstream position. The present invention also provides a cigarette comprising the filter of the present invention at one end of a cigarette rod.

In the present invention, upstream and downstream are based on the flow direction of mainstream smoke during cigarette smoking. That is, the tobacco rod side is upstream and the suction side is downstream.

BRIEF DESCRIPTION OF THE FIGURES

The attached figure is a partially exploded perspective view showing a cigarette with a filter according to one embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail.

The attached figure is a partially developed perspective view showing a cigarette with a filter according to one embodiment of the present invention. This figure should be construed as illustrating a filter for cigarettes according to one embodiment of the present invention.

The cigarette 10 with a filter shown in the figure is an evening coco rod 20 formed by wrapping a normal tobacco filler 201 such as a tobacco cut with a cigarette wrapper 202. It is equipped with a filter 30 attached to one end of the 'collod 20', and the configuration other than the configuration of the filter is the same as that of a normal cigarette with a filter. It is. Therefore, as the evening rod 20, a normal evening rod can be used.

In the present invention, the filter is composed of (A) a filter section to which a fatty acid ester having a viscosity of 1 to 300 cP or a liquid fatty acid is added as a mainstream smoke component remover; ) Glycol having a viscosity of 1 to 300 cP as a mainstream smoke component remover It is equipped with two or more filter sections of the filter section to which activated carbon was added as a filter section to which activated carbon was added as a mainstream smoke component remover and the filter section to which (C) mainstream smoke component was removed.

Examples of the liquid fatty acid ester added to the filter section (A) include natural oils and fats such as olive oil, castor oil, rapeseed oil, corn oil, safflower oil, and rape seed oil. Etc. can be exemplified. Examples of the liquid fatty acid added to the filter section (A) include lauric acid, oleic acid, linoleic acid, and linolenic acid. As a mainstream smoke component remover added to the filter section (A), olive oil is preferred. Olive oil matches the flavor very well with tobacco flavor. The added amount of the liquid fatty acid ester or fatty acid is preferably 5% to 30% of the weight of the filter fiber.

Examples of glycols having a viscosity of lcP to 300 cP added to the filter section (B) include polyethylene glycol, propylene glycol, and the like. Wren glycol is preferred. The amount of glycol added is preferably 5% to 30% of the weight of the filter fiber.

As the activated carbon to be added to the filter section (C), there can be used the activated carbon used in ordinary so-called charcoal filters, for example, coconut shell activated carbon. The amount of activated carbon to be added is preferably 10 to 80 mg per 10 mm filter length (filter circumference 16.8 mm to 25.8 mm). In the figure, the file filters 30 are from the upstream side, for example, four filer sections separate from each other, ie the first file filters. Equipped with one section 301, second filter section 302, third filter section 303 and fourth filter section 304 .

In one preferred embodiment of the present invention, the first filter section 301 provided in contact with the rod 20 and the rod 20 is provided with the filter section (A). ), The second filter section 302 is constituted by the above filter section (B), and the third filter section 303 is constituted by The filter section (C) is composed of the above. The fourth filter section 304 located at the most downstream is the activated carbon in the third filter section 103 composed of the filter section (C). It is composed of a plain file and a daylight to prevent falling off. Plain filter Yuichi does not contain additives for removing mainstream smoke, and consists essentially of filter materials.

The first to fourth filters 1st section 30:! To 304 are all filter materials used for ordinary cigarette filters, such as paper. And synthetic tow made of synthetic fibers such as cellulose rayon fiber, cellulose acetate fiber, vinylon fiber, etc., except for the fourth filter section 304. Have been. The mainstream smoke remover in Filter Sections 301 and 302 can be added by spraying or applying to the filter material. Activated carbon used in the third filter section is dispersed and mixed in the filter material in a conventional manner. Can be added.

Needless to say, in the configuration of the filter according to the preferred embodiment described above, any one of the filter sections 301 to 303 can be omitted. . Also, the filter section 304 can be omitted. However, the filter for cigarettes of the present invention is a filter section.

It is most preferred to have a filter section (C) downstream of (A) and Z or (B). With this configuration, the filtration efficiency is synergistically improved. Also, the filter section

By arranging (C) on the downstream side, a decrease in the filtration rate of activated carbon mainstream smoke over time can be suppressed.

Each of the first to fourth filter sections 301 to 304 is individually wound as required by individual winding paper (not shown). , And are wound together by one molded paper 310. The filter 30 formed in this way is attached to one end of the cigarette rod 20 by ordinary chip paper 320.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

Example 1

In order to confirm the influence of the polarity of the mainstream smoke component remover, olive oil, propylene glycol or linoleic acid (all manufactured by Wako Pure Chemical Industries, Ltd.) ) Was added to a cigarette filter to evaluate the filtration rate of mainstream smoke components.

An unplasticized cellulose acetate is used as a cigarette filler. Tate file Yuichi (3YZ43000) was used. Each mainstream smoke component remover was sprayed into fine particles using an atomizer on a cigarette filter, and 35 mg of each was added. As the evening color, Tano Color of Seven Seven Super Light sold by Nippon Tobacco Inc. was used, and each mainstream smoke component remover was added to it. The filed Yuichi was attached with scotch tape to produce a prototype of cigarettes.

The prototype cigarette was spontaneously burned for 15 mm, then puffed under standard smoking conditions by 1 puff, and the mainstream smoke component flowing out of the filter was analyzed by gas chromatography Z-mass spectrum analysis. Measured. The filtration rate of each mainstream smoke component was calculated as a decrease rate of each mainstream smoke component based on the mainstream smoke component of the evening barcorod without a filter. The results are shown in Table 1 below. Table 1 also shows the results when a filter (control) without the mainstream smoke remover was used.

Table 1: Filtration rates of mainstream smoke components by various mainstream smoke component removers

As shown in Table 1, when olive oil was added, the filtration rate of hydrocarbons, pyridins, and phenols was significantly increased as compared to the control filter. ing. It can be seen that when propylene glycol is added, the filtration rate of pyridins, organic acids, and phenols is remarkably increased, and shows removal characteristics different from that of olive oil. When linoleic acid was added, excellent filtration rates were obtained for all mainstream smoke components shown here. These results indicate that the mainstream smoke component remover preferentially removes the mainstream smoke component having a polarity close to its polarity.

Example 2

In this example, the effect of combining a filter section to which activated carbon was added as a mainstream smoke component remover with a filter section to which another mainstream smoke component remover was added was evaluated.

(1) First, in order to evaluate the filtration rate of the filter section alone to which activated carbon was added, activated carbon used for ordinary cigarettes was charged in the form of a packed bed (thickness: 2 mm). A prototype filter section filled with mg (Charcoal Filter Yuichi) was prototyped. Was. To prevent the activated carbon from spilling, place a 5-mm long plain cellulose acetate filter section (3Y / 4300) into a charcoal filter section. It was located downstream of the show. The filter was attached to one end of the evening barco rod as in Example 1, and the mainstream smoke components were compared with and without activated carbon, and the filtration rate was evaluated by the indirect method. The analysis method is the same as in Example 1.

(2) In order to evaluate the filtration rate of the filter section to which olive oil was added alone, a filter was added to a 20 mm long cellulose acetate filter (3YZ4300). A filter section was prepared by adding 15 mg of olive oil in the same manner as in Example 1, and the filtration rate of the mainstream smoke component was evaluated in the same manner.

(3) Next, on the downstream side of the filter oil-added filter section, the filter prepared in (1) above is added to the filter oil-added section by the charcoal filter. The filter section was placed in contact with the filter section and attached to the tobacco rod, and the filtration rate of the mainstream smoke component was similarly evaluated.

The results obtained are shown in Table 2 below.

Table 2: Comparison of filtration rate (%) of filter section alone and combination

In Table 2, the calculated values for the combination of the charcoal filter section and the olive oil-added filter section are simple calculated values based on using each filter section alone. . As shown in Table 2, when comparing the calculated value with the measured value, no significant difference was found in the filtration rate for the high boiling components, but the measured value was significantly higher for the low boiling components. ing. From this result, when the filter section with activated carbon added as the mainstream smoke component remover was combined with the filter section downstream with the other mainstream smoke component remover, each filter section alone was used. It can be seen that an effect (synergistic effect) that is greater than the combined effect is obtained.

As described above, according to the present invention, a cigarette filter capable of efficiently filtering mainstream tobacco smoke for each component, and a cigarette filter. Filtered cigarettes with such filters will be provided.

Claims

The scope of the claims

1. The following three filter sections (A) to (C): (A) a liquid fatty acid ester having a viscosity of 1 to 300 cP or a filter section to which a liquid fatty acid is added,

(B) a filter section to which glycol having a viscosity of 1 to 300 cP is added, and

(C) Filter section with activated carbon

Of these, cigarette filters with two or more filter sections.

2. The filter according to claim 1, wherein the fatty acid ester is an olive oil.

3. The filter according to claim 1, wherein the dalicol is propylene glycol or polyethylene dalicol.

4. A filter section (A) and / or a filter section (B) are provided, and the filter section (C) is provided downstream of these filter sections. The filter according to claim 1, wherein

5. The filter according to claim 1, further comprising a plain filter section at a most downstream position.

6. A cigarette comprising a cigarette rod and a filter according to claim 1 provided at one end of the cigarette rod.