WO2007043171A1

WO2007043171A1 - Tobacco filter

Info

Publication number: WO2007043171A1
Application number: PCT/JP2005/018810
Authority: WO
Inventors: Masaji Matsunaga; Fumito Yoshida
Original assignee: Nissei Bio Company, Limited
Priority date: 2005-10-12
Filing date: 2005-10-12
Publication date: 2007-04-19
Also published as: JPWO2007043171A1

Abstract

[PROBLEMS] To provide a tobacco filter that is capable of adsorbing and removing with especial effectiveness any carcinogenic substances, such as dioxins and benzpyrene, contained in mainstream smoke occurring at tobacco smoking and is simultaneously capable of maintaining the fragrance and flavor peculiar to tobacco and the air flow through the tobacco filter. [MEANS FOR SOLVING PROBLEMS] There is provided a tobacco filter comprising a harmful substance removing material of corncob pulverizate.

Description

Specification

Cigarette filter

Technical field

[0001] The present invention contains a harmful substance removing material that can effectively remove harmful substances in mainstream smoke of tobacco during smoking, and also serves as a smoking material unique to tobacco. The present invention relates to a tobacco filter that does not impair the taste and air permeability of the filter.

Background art

[0002] Conventionally, cellulose compounds have been generally used as cigarette filters. For example, a filter with cellulose acetate fiber strength is widely used because it can adsorb and remove harmful components in the mainstream smoke of tobacco without compromising the flavor. Specifically, the filtration efficiency of the filter is improved by, for example, cultivating cellulose acetate fiber on crimped tow and reducing the single fiber fineness of the tow or increasing the fiber filling amount. .

Furthermore, for the purpose of improving the adsorptivity of harmful components, it is also known to add an inorganic adsorbent such as activated carbon or zeolite to the cigarette filter, and typical examples include the following.

(1) A material containing zeolite powder as an adsorbent (Patent Document 1).

(2) Containing porous glass composed of at least CaO, B 2 O, SiO, and AIO (

2 3 2 3

Patent Document 2).

[0003] On the other hand, examples of materials that adsorb and remove harmful components include, for example, soil, sand, gravel, clay, stone, concrete, asphalt, brick, block, carbon such as activated carbon and carbon black, zeolite, polymer, Known plastics, elastomeric materials, metal alloys such as metals and steel, glass, glass fibers, ceramics, textiles such as woven and knitted fabrics, cellulosic materials, and combinations thereof Yes.

Among these, as specific cellulosic materials, wood, wood chips, sawdust, paper, ball paper, corn cobs (corn cob), and the like are known. Patent Document 1: Japanese Patent Laid-Open No. 02-308784

Patent Document 2: JP 2001-95552 A

Disclosure of the invention

Problems to be solved by the invention

[0004] By the way, in recent years, the carcinogenicity of toxic substances in mainstream tobacco, especially dioxins and benzpyrene, has attracted attention, and there has been a growing demand for filters that can effectively absorb and remove these toxic substances. Yes. However, even though the cigarette filter has improved the adsorption-removal ability of harmful substances by applying the above-mentioned improvements, although it has been mentioned about the removal effect of tar and nicotine in the mainstream smoke, dioxins And the removal effect on benzpyrene was not shown.

In addition, cigarette filters that can remove harmful substances in the mainstream smoke of cigarettes can remove the unique flavor of tobacco that only has the ability to remove harmful substances, that is, remove chemical substances that are the source of the flavor, or filter The taste of the ingredients used in the process may be added, and the taste of tobacco may be impaired. In addition, the air permeability of the filter may be impaired, and there may be cases where the cigarette smoke may be absorbed, leading to a decline in tobacco quality.

[0005] The present inventors have intensively studied to solve the problems of the prior art, and as a result, surprisingly, corn cobs pulverized material was used as a harmful substance removing material, and the harmful filter was used in tobacco filters. By including a substance removing material, it was found that the unique flavor of tobacco and good air permeability of the filter can be maintained as long as the harmful substances in the mainstream tobacco can be effectively adsorbed and removed, and the present invention has been completed.

[0006] That is, the present invention provides a tobacco filter that can particularly effectively adsorb carcinogenic substances such as dioxins and benzpyrene, and that can maintain the unique taste of tobacco and the breathability of the filter. Objective.

Means for solving the problem

[0007] The present invention relates to a tobacco filter comprising a harmful substance removing material that also has a corn cobs grinding power.

[0008] In the tobacco filter of the present invention, the harmful substance removing material is water of 5 mass% or less. It would also be desirable to have a dried corn cobs grind force having a partial content.

In addition, in the case where the harmful substance removing material is mixed in a filter rod, which is a fiber filter material, to form the tobacco filter of the present invention, the harmful substance removing material is preferably 150 μm. Consists of ground corn cobs having a particle size of m to 500 μm.

Alternatively, the filter for a tapaco of the present invention is provided by including a plurality of filter rods that also serve as a fibrous filter material, and the layer that also serves as a harmful substance removal material is interposed between the filter rod and the filter rod. In that case, however, the harmful substance removing material may preferably be made of a corn cobs pulverized product having a particle size of 500 / zm to 1,000 μm.

Further, the harmful substances removed in the tobacco filter of the present invention may be dioxins and / or benzpyrene.

The invention's effect

[0009] According to the present invention, by using a corn cobs pulverized product as a harmful substance removing material, the porous body structure of the cobs crushed product is harmful when smoking tobacco, particularly dioxins and benzpyrene. It is possible to effectively remove the harmful substances from the mainstream smoke of tobacco.

In addition, by adjusting the particle size and amount of corn cob pulverized product, it is possible to maintain the unique flavor of tobacco and good air permeability of the filter while having the above-mentioned ability to remove harmful substances. be able to.

In fact, corn cobs are usually processed as industrial waste in agricultural areas, and raw materials for removing harmful substances can be procured at low cost.

BEST MODE FOR CARRYING OUT THE INVENTION

[0010] Each component and function of the tobacco filter of the present invention will be further described below.

[0011] (1) About corn cobs

The corn cobs pulverized product used as a harmful substance removing material in the present invention is obtained by crushing the cobs of corn, and preferably obtained by crushing the cobs of corn. Say things. Preferably, the corn cobs Examples of the corn cobs pulverized product include, but are not limited to, those obtained by pulverizing the mint after being dried in the sun or a drier. Various shapes obtained by pulverization (for example, 4 A polyhedron such as a hexahedron, a hexahedron, and an octahedron, a sphere, a flat sphere, etc.). It is known that the internal structure of the corn cob pulverized product is porous and has a cocoon-cam structure (honeycomb shape), and has many small holes on the partition walls forming pores (Kiyo Ishigooka). Based on the 39th Annual Meeting of the Japan Society for Experimental Animal Engineers), it is presumed that harmful substances are adsorbed in these small holes. In other words, the ability of corn cob pulverized products to remove harmful substances appears to be due to its own internal structure.

The particle size of the corn cobs pulverized product can be mixed in a filter rod made of a fiber filter material, or a harmful substance removing material can be formed between a plurality of filter rods made of the fiber filter material. It is possible to intervene as a layer, have an effective ability to remove harmful substances, and select as appropriate in consideration of maintaining the tobacco flavor and the good air permeability of the tobacco filter. To do. If the particle size is too large, the total surface area of the pulverized product will be relatively small, and it will be relatively inferior in terms of the ability to remove harmful substances. In addition, it will enter the filter rod that is the strength of the fibrous filter material. Contamination can be difficult, and if the particle size is too small, the harmful substance removal ability is maintained at a high level, but the air permeability of the entire filter is lowered and the fiber filter material is likely to be clogged. Become. For this reason, when mixed into the filter rod that also serves as the fibrous filter material, the particle size is preferably in the range of 150 / z m to 500 μm. Further, when the filter rod is interposed between the filter rods as a layer made of corn cobs, it is preferable that the particle diameter is in the range of 500 μm to 1,000 μm.

In addition, it is particularly preferable that the corn cobs pulverized product has a moisture content of preferably 5% by mass or less!

(2) How to install harmful substance removal material inside tobacco filter

The harmful substance removing material in the present invention may be mixed in a filter rod which is a fibrous filter material, or a layer made of a harmful substance removing material is formed, and a plurality of the fibrous filter material forces are formed. The layer may be interposed between the filter rods. When the harmful substance removing material is mixed into the filter rod, which is the fibrous filter material, the distribution of the harmful substance removing material in the filter rod is effective for the effective adsorption and removal of harmful substances. Considering this, it is preferable that the filter is partially distributed on one end side in contact with the tobacco of the tobacco filter.

Further, when a layer made of a harmful substance removing material is formed and the layer is interposed between a plurality of filter rods made of the fibrous filter material, that is, a sandwich structure in which the layer is sandwiched between the fibrous filter material and In this case, considering the effective adsorption / removal effect of harmful substances, the layer is preferably interposed in the substantially central part of the tobacco filter.

[0013] (3) Quantity of hazardous substance removal material

The amount of the harmful substance removing material used in the present invention can have an effective harmful substance removing ability when processed into a tobacco filter, and the tobacco flavor and the good air permeability of the tobacco filter are maintained. Considering as much as possible, it should be selected as appropriate.

If the amount of the harmful substance removal material used is too small, the target harmful substance removal ability may not be achieved, and if it is too large, the filter may be clogged, impairing the air permeability of the filter. obtain.

For this reason, for example, in the case of mixing in the filter rod which is the fibrous filter material, it is in the range of 0.05% by mass to 10% by mass, preferably 0.1% by mass to It is desirable to use in the range of 5% by mass, more preferably in the range of 0.3% to 1% by mass.

In addition, when a layer made of a harmful substance removing material is formed and the layer is interposed between a plurality of filter rods made of the fibrous filter material, 0.01% by mass to It is desirable to use in the range of 10% by mass, preferably in the range of 0.05% to 3% by mass, more preferably in the range of 0.1% to 1.5% by mass.

[0014] (4) Fiber filter material

As the material for the fibrous filter material in the present invention, a material commonly used as a cigarette filter may be used. Organic acid esters such as butyrate; cellulose acetate propionate, cellulose acetate butyrate Mixed acid esters such as silicates; and cellulose ester derivatives such as poly-force prolatatone grafted cellulose esters. These may be used alone or in combination of two or more.

[0015] (5) Other contained substances

The tobacco filter of the present invention also does not impair the harmful substance removal ability of the ground corn cobs, and removes further harmful substances when the flavor and good air permeability of tobacco are maintained. It may further contain a substance to be obtained, such as activated carbon or a fragrance.

Example

Next, the present invention will be described more specifically with reference to examples. The following examples should not be construed as limiting the invention in any way.

[0017] In this example and comparative example, three types of test tobacco were prepared using three types of tobacco filters prepared by the procedure described below, and the effects of removing various harmful substances in the mainstream tobacco smoke, And the smoking test regarding a smoking feeling was done.

[0018] <Creation of test tobacco filter>

Example 1

Two commercially available acetate filters (0.8 cm wide in the longitudinal direction) were used, and with this filter, ground corn cobs (made by Lengo Co., Ltd., particle size 0.6 mm-), a granular layer consisting of 114 mg Z main force (about 0.5 cm width) was used as a test cigarette filter.

[0019] Comparative Example 1

In this comparative example, a test tobacco filter was prepared in the same manner as in Example 1 except that the granular layer was activated carbon (Korea Sennetin Co., Ltd., particle size 0.51-mm) and 189 mgZ.

[0020] Comparative Example 2

In this comparative example, only a commercially available acetate filter (longitudinal direction 2.1 cm width) was used as a test tobacco filter.

[0021] <Creation of test tobacco>

Examples Test tobacco filters prepared in Comparative Examples 1 and 2 were tested with a relative humidity of 60%. And stored for more than 48 hours in an environment with a temperature of 22 ° C.

Use the commercial cigarette CiT (trade name Seven Star) for the tobacco part, and also store it for 48 hours or more in an environment with a relative humidity of 60% and a temperature of 22 ° C. The test tobacco was connected to a test tobacco filter.

Each test tobacco obtained was tested according to the test methods of Test Examples 1 and 2 below.o

[0022] <Test method>

Test example 1: Hazardous substance removal ability test

The Hamburgll automatic smoking device was allowed to smoke 10 times a total of 20 types of cigarette smoke (air: cigarettes = 7: 3) of the three types of cigarettes prepared as described above in lpuffZ35mlZ for 2 seconds. Thereafter, the amount of benzpyrene contained in the exhausted total gas was measured. The results are shown in Fig. 1 and Table 1.

[Table 1] Benzpyrene outflow

[0023] As shown in Fig. 1 and Table 1, in the tobacco filter using corn cob pulverized product, the average benzpyrene concentration in the mainstream smoke was reduced by about 48% compared to the case of the acetate filter alone, and It was found that the effect of adsorbing and removing benzpyrene was higher by about 21% than when activated carbon was used.

[0024] Test Example 2: Smoking sensation test

Thirty subjects smoked the three types of test cigarettes prepared in the above procedure, including corn cobs pulverized, activated carbon added, and We compared the taste power and the sucking!

The evaluation shows how much the savory and sucking feelings are reduced compared to the acetate filter alone How

No change, or no noticeable power ... 3 points

I felt a little uncomfortable ... 2 points

Clearly felt uncomfortable · · · 1 point

The average score was calculated for each of the corn cobs pulverized and the activated carbon crushed.

The results are shown in Table 2.

[Table 2] Test Cigarette Filter Flavor Flavor Suction Sensation Acetate-to-filter + Corn cob pulverized product 2.7 7 8 Acetate-to-filter + activated carbon 2.7 7 8

[0025] As shown in Table 2, the cigarette filter using the corn cobs pulverized product had almost the same drought results as the case of only the tobacco-specific flavor and absorption and dust sensitivity acetate filter.

Brief Description of Drawings

[0026] [Fig. 1] Fig. 1 is a diagram showing the detected amount of benzpyrene in mainstream smoke due to the difference in the test tobacco filter.

Claims

The scope of the claims

[1] Tobacco filter containing a harmful substance removing material

[2] The tobacco filter according to [1], wherein the harmful substance removing material comprises a pulverized dried corn cobs having a water content of 5% by mass or less.

[3] The tobacco filter according to claim 1 or 2, wherein the harmful substance removing material is mixed in a filter rod made of a fibrous filter material.

[4] The tobacco filter according to claim 3, wherein the harmful substance removing material is made of a corn cobs pulverized product having a particle diameter of 150 to 500 μm.

[5] The filter rod according to claim 1, further comprising a plurality of filter rods made of a fibrous filter material, wherein the layer of the harmful substance removing material is interposed between the filter rod and the filter rod. The tobacco filter according to claim 2.

[6] The tobacco filter according to [5], wherein the harmful substance removing material is made of corn cobs having a particle size of 500 μm to 1,000 μm.

7. The tobacco filter according to any one of claims 1 to 6, wherein the harmful substances are dioxins or Z and benzpyrene.