JP2012100583A - Smoking article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce carbon monoxide generated from a smoking article at low cost.SOLUTION: A cigarette body 2 includes a filler 21 and a roll paper 22. At least either of the filler 21 and the roll paper 22 includes carbon monoxide reducer. The carbon monoxide reducer includes calcium carbonate, copper and/or copper compound, and iron and/or iron compound. In one embodiment, calcium carbonate, copper and/or copper compound, and iron and/or iron compound compose mix in roughly uniform composition. Typically, at least part of copper and/or copper compound and at least part of iron and/or copper compound are carried by particles composed of calcium carbonate. Typically, most of copper and iron are present as oxides.

Description

  The present invention relates to smoking articles.

  Attempts have been made to reduce carbon monoxide generated from smoking articles, specifically, carbon monoxide contained in mainstream smoke generated during smoking and sidestream smoke generated during natural combustion. For example, Patent Document 1 describes the use of silver or silver oxide as a catalyst for oxidizing carbon monoxide for this purpose.

Special table 2008-502343 gazette

  Silver and silver oxide are expensive. Therefore, an object of the present invention is to enable carbon monoxide generated from smoking articles to be reduced at a low cost.

  According to one aspect of the present invention, there is provided a smoking article comprising a carbon monoxide reducing agent containing calcium carbonate, copper and / or a copper compound, and iron and / or an iron compound.

  According to the present invention, carbon monoxide generated from a smoking article can be reduced at a low cost.

The perspective view which shows the smoking article which concerns on 1 aspect of this invention. The graph which shows the relationship between temperature and the carbon monoxide density | concentration in the exit of a quartz tube. The graph which shows an example of the relationship between temperature and a carbon monoxide removal rate. The graph which shows the other example of the relationship between temperature and a carbon monoxide removal rate. The graph which shows the further another example of the relationship between temperature and a carbon monoxide removal rate. The graph which shows the further another example of the relationship between temperature and a carbon monoxide removal rate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view illustrating a smoking article according to one embodiment of the present invention.

  The smoking article shown in FIG. 1 is a cigarette. The cigarette 1 includes a cigarette main body 2, a filter (not shown), and chip paper 4.

  The cigarette body 2 has a rod shape, typically a rod shape having a substantially circular cross section perpendicular to the length direction. The cigarette body 2 includes a filler 21 and a wrapping paper 22.

  The filler 21 includes, for example, chopped tobacco. Chopped tobacco generates a gaseous flavor component by heat generated by combustion.

  As the filler 21, chopped tobacco may be used. Alternatively, the filler 21 may be made of a tobacco sheet obtained by making a paper from a slurry containing chopped tobacco, tobacco fine powder, a binder, and an aerosol generation source, and rolling it.

  The filler 21 can further include other components. For example, the filler 21 can further include a perfume and swelling agents such as glycerol and propylene glycol.

  The wrapping paper 22 is wound in a cylindrical shape. The cylindrical body made of the wrapping paper 22 contains the filler 21. At least one of the filler 21 and the wrapping paper 22 contains a carbon monoxide reducing agent described later.

  The filter is adjacent to one end of the cigarette body 2. The filter has a column shape, typically a column shape. Typically, the side surface of the filter is substantially flush with the side surface of the cigarette body 2.

  The filter includes, for example, a number of fibers joined together. These fibers may be wound with a web.

  The chip paper 4 covers the side surface of the filter. The chip paper 4 partially overlaps the wrapping paper 22 and is bonded to the wrapping paper 22 at this overlapping portion. In this way, the chip paper 4 integrates the cigarette body 2 and the filter. The filter and chip paper 4 can be omitted.

  As described above, at least one of the filler 21 and the wrapping paper 22 contains a carbon monoxide reducing agent. The carbon monoxide reducing agent contains calcium carbonate, copper and / or a copper compound, and iron and / or an iron compound. According to an example, calcium carbonate, copper and / or a copper compound, and iron and / or an iron compound form a mixture with a substantially uniform composition. Typically, at least a part of copper and / or a copper compound and at least a part of iron and / or an iron compound are supported on particles made of calcium carbonate. Typically, most of copper and iron exist as oxides.

  Since this carbon monoxide reducing agent does not contain a noble metal such as silver as an essential component, it can be manufactured at low cost. And this carbon monoxide reducing agent exhibits the outstanding performance. This will be described below.

  Generally, the combustion temperature of the cigarette body is about 600 ° C. during natural combustion and about 800 ° C. during smoking. Since carbon monoxide is generated as the cigarette body burns, it is desirable that the carbon monoxide reducing agent be capable of oxidizing or adsorbing carbon monoxide in a temperature range of at least about 600 ° C to about 800 ° C.

  In addition, the cigarette body generates a gaseous flavor component by heat accompanying combustion. Since most of the flavor components are organic substances having a small molecular weight, the temperature range in which the cigarette body generates a gaseous flavor component is lower than the combustion temperature of the cigarette body. If the carbon monoxide reducing agent exhibits high performance as a catalyst or adsorbent in this low temperature range, the taste may be affected.

  The carbon monoxide reducing agent used in this embodiment does not exhibit high performance as a catalyst or an adsorbent in a temperature range where the cigarette body 2 generates a gaseous flavor component, and a temperature range of about 600 ° C to about 800 ° C. The carbon monoxide can be oxidized or adsorbed with high efficiency. That is, this carbon monoxide reducing agent is included in mainstream smoke generated during smoking and sidestream smoke generated during natural combustion, with little influence on taste, although it can be manufactured at low cost. Carbon oxide can be reduced.

  Moreover, this carbon monoxide reducing agent does not easily react with water. Therefore, this carbon monoxide reducing agent exhibits high performance even when the cigarette 1 absorbs moisture.

A carbon monoxide reducing agent is manufactured by the following method, for example.
First, calcium carbonate powder is prepared. For example, a powder having an average particle diameter measured by a laser diffraction method in a range of 0.5 μm to 5 μm is prepared.

  Next, a dispersion is prepared by dispersing this powder in a solution containing a copper compound and an iron compound. For example, nitrate is used as the copper compound and the iron compound. As the solvent, for example, ethanol is used.

  The dispersion is sufficiently stirred, dried, and then heat-treated, for example, in an air atmosphere. Thereafter, the heat-treated product is pulverized as necessary. As described above, a powdery carbon monoxide reducing agent is obtained.

  The carbon monoxide reducing agent can be contained in the filler 21 by, for example, preparing a slurry containing the carbon monoxide reducing agent and spraying or sprinkling the slurry on the tobacco. The carbon monoxide reducing agent can be contained in the wrapping paper 22 by, for example, preparing a slurry containing the carbon monoxide reducing agent and spraying or sprinkling the slurry on the wrapping paper 22. Alternatively, the wrapping paper 22 containing the carbon monoxide reducing agent can be manufactured by preparing a slurry containing a paper stock and a carbon monoxide reducing agent and making paper from the slurry.

  The proportion of the carbon monoxide reducing agent in the cigarette body 2 is in the range of 1 to 80% by mass according to an example, and in the range of 20 to 50% by mass according to another example. Further, when the carbon monoxide reducing agent is contained in the filler 21, the proportion of the carbon monoxide reducing agent in the filler 21 is in the range of 1 to 80% by mass according to one example, and 50 according to another example. It exists in the range of thru | or 80 mass%. In addition, when the carbon monoxide reducing agent is contained in the wrapping paper 22, the proportion of the carbon monoxide reducing agent in the filler 21 is in the range of 1 to 60% by mass according to an example, and according to another example. It is in the range of 20 to 50% by mass. When these ratios are reduced, the effect of reducing carbon monoxide is reduced. On the other hand, when this ratio is increased, the taste becomes lighter or the strength of the wrapping paper 22 decreases.

  When calcium carbonate is 100 parts by mass, the mass ratio in terms of copper (II) of copper or copper oxide in the carbon monoxide reducing agent is within a range of 0.01 to 10 parts by mass according to an example. According to another example, it is in the range of 0.01 to 5 parts by mass. When this mass ratio is small, the effect of reducing carbon monoxide becomes small. On the other hand, when this mass ratio is large, an oxidation reaction occurs in a low temperature range, and there is a high possibility of affecting the taste.

  When calcium carbonate is 100 parts by mass, the mass ratio in terms of iron (III) of iron or iron oxide in the carbon monoxide reducing agent is in the range of 0.1 to 10 parts by mass according to an example. According to another example, it is in the range of 0.1 to 5 parts by mass. When this mass ratio is small, the effect of reducing carbon monoxide becomes small. On the other hand, when this mass ratio is large, an oxidation reaction occurs in a low temperature range, and there is a high possibility of affecting the taste.

The ratio M _Fe2O3 / M _CuO of the mass M _{Fe2O3 in} terms of iron (III) of iron or iron oxide in the carbon monoxide reducing agent and the mass M _{CuO in} terms of copper (I) of copper or copper oxide is In one example, it is in the range of 0.25 to 500, and in another example, it is in the range of 1 to 200. When this ratio is small, oxidation occurs in a low temperature range, and there is a high possibility of affecting the taste. On the other hand, when this ratio is large, the effect of reducing carbon monoxide is reduced.

<Sample A>
A carbon monoxide reducing agent was produced by the following method.
First, calcium carbonate powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the calcium carbonate powder, a commercially available light calcium carbonate powder having an average particle diameter of about 1.0 μm was used. As nitrate, copper nitrate and iron nitrate were used. The amount of copper nitrate was adjusted so that the proportion of copper in the carbon monoxide reducing agent was 0.075% by mass in terms of copper (II) oxide. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 2.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “sample A”.

<Sample B>
A carbon monoxide reducing agent was produced by the following method.
First, calcium carbonate powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the calcium carbonate powder, commercially available heavy calcium carbonate having an average particle size of about 1.0 μm was used. As nitrate, copper nitrate and iron nitrate were used. The amount of copper nitrate was adjusted so that the proportion of copper in the carbon monoxide reducing agent was 0.050% by mass in terms of copper (II) oxide. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 2.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “Sample B”.

<Sample C>
A carbon monoxide reducing agent was produced by the following method.
First, calcium carbonate powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the calcium carbonate powder, commercially available heavy calcium carbonate having an average particle size of about 1.0 μm was used. As nitrate, copper nitrate and iron nitrate were used. The amount of copper nitrate was adjusted so that the proportion of copper in the carbon monoxide reducing agent was 0.10% by mass in terms of copper (II) oxide. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 2.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “Sample B”.

<Sample D>
As sample D, a commercially available light calcium carbonate having an average particle diameter of about 1.0 μm was prepared.

<Performance evaluation 1>
50 mg of sample A was dispersed almost uniformly in glass wool, and this was filled in a quartz tube having an inner diameter of 8 mm. Next, an average rate of temperature increase of the glass wool temperature of 1 ° C./second while flowing a model gas composed of nitrogen, 0.47% by volume of carbon monoxide, and 2% by volume of oxygen at a flow rate of 600 mL / min. The temperature was raised from room temperature to 800 ° C. And in this temperature rising process, the concentration of carbon monoxide at the exit of the quartz tube was monitored by a portable analysis system PG-230 manufactured by Horiba, Ltd.
The above test was also performed on samples B to D. The results are shown in FIGS.

  FIG. 2 is a graph showing the relationship between temperature and carbon monoxide concentration at the exit of the quartz tube. FIG. 3 is a graph showing the relationship between temperature and carbon monoxide removal rate. The carbon monoxide removal rate shown in FIG. 3 is a value obtained by dividing the difference between the carbon monoxide concentration (initial concentration) at the inlet of the quartz tube and the carbon monoxide concentration at each temperature by the initial concentration. is there.

  As shown in FIGS. 2 and 3, Sample D had a low ability to remove carbon monoxide when the heating temperature was about 700 ° C. or lower. On the other hand, Samples A to C had a high ability to remove carbon monoxide in the temperature range of 600 to 800 ° C., and a low ability to remove carbon monoxide in the low temperature range.

<Sample E>
A carbon monoxide reducing agent was produced by the following method.
First, calcium carbonate powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the calcium carbonate powder, commercially available light calcium carbonate having an average particle diameter of about 1.0 μm was used. As the nitrate, iron nitrate was used. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 1.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “Sample E”.

<Sample F>
As sample F, a commercially available alumina powder having an average particle diameter of about 1.0 μm was prepared.

<Sample G>
A carbon monoxide reducing agent was produced by the following method.
First, alumina powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the alumina powder, a commercially available alumina powder having an average particle diameter of about 1.0 μm was used. As the nitrate, iron nitrate was used. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 1.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “sample G”.

<Sample H>
As sample H, a commercially available silica powder having an average particle size of about 4.0 μm was prepared.

<Sample I>
A carbon monoxide reducing agent was produced by the following method.
First, silica powder was mixed with an ethanol solution of nitrate to prepare a slurry. As the silica powder, a commercially available silica powder having an average particle size of about 4.0 μm was used. As the nitrate, iron nitrate was used. The amount of iron nitrate was adjusted so that the ratio of iron in the carbon monoxide reducing agent was 1.0% by mass in terms of iron (III) oxide.

  The slurry was sufficiently stirred and further dried, and then the dried product was heat-treated at 600 ° C. for 10 minutes in an air atmosphere. As described above, a powdery carbon monoxide reducing agent was obtained. Hereinafter, the carbon monoxide reducing agent thus obtained is referred to as “Sample I”.

<Performance evaluation 2>
For each of the samples E to I, the same test as in the performance evaluation 1 was performed. The results are shown in FIGS.

  4 to 6 are graphs showing the relationship between the temperature and the concentration of carbon monoxide at the outlet of the quartz tube.

  FIG. 4 shows the data obtained for samples D and E. As shown in FIG. 4, sample E was superior in carbon monoxide removal ability in the temperature range of 600 to 700 ° C. compared to sample D, but carbon monoxide removal ability in the temperature range of 750 to 800 ° C. It was inferior to. Further, as apparent from the comparison between the data in FIG. 2 and the data in FIG. 4, the carbon monoxide removal ability of the sample E in the temperature range of 600 to 800 ° C. It was low compared with the carbon oxide removal ability.

  FIG. 5 shows data obtained for samples F and G. As shown in FIG. 5, the sample G was superior to the sample F in the ability to remove carbon monoxide in the temperature range of 600 to 700 ° C. However, as is clear from the comparison between the data in FIG. 2 and the data in FIG. 5, the carbon monoxide removal ability of the samples F and G in the temperature range of 600 to 800 ° C. It was much lower than the carbon monoxide removal ability shown.

  FIG. 6 shows data obtained for samples H and I. As shown in FIG. 6, sample I was superior in carbon monoxide removal ability in the temperature range of 760 to 800 ° C. compared to sample H, but carbon monoxide removal ability in the temperature range of 600 to 740 ° C. It was inferior to. As is clear from the comparison between the data in FIG. 2 and the data in FIG. 6, the carbon monoxide removal ability of the samples H and I in the temperature range of 600 to 800 ° C. It was much lower than the carbon monoxide removal ability shown.

  DESCRIPTION OF SYMBOLS 1 ... Cigarette, 2 ... Cigarette main body, 4 ... Chip paper, 21 ... Filler, 22 ... Wrapping paper.

Claims (1)

  A smoking article comprising a carbon monoxide reducing agent containing calcium carbonate, copper and / or a copper compound, and iron and / or an iron compound.

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