JP2002501736A - Smoking - Google Patents

Abstract

  (57) [Summary] By wrapping a tobacco rod of a tobacco made of tobacco mixed with a regenerated tobacco sheet containing activated carbon particles with paper having a transmittance of 20 Coresta units or more, sidestream smoke generated from the tobacco is reduced, and Specific components are selectively reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to smoking articles such as cigarettes, cigars and cigarillos, and to reducing sidestream smoke generated from these smoking articles. Sidestream smoke is smoke that is generated when a smoking article is ignited and is not inhaled by a smoker. In contrast, mainstream smoke is smoke that is inhaled by smokers. Mainstream smoke and sidestream smoke have different chemical properties.

Sidestream smoke is felt uncomfortable for non-smokers, especially when cigarettes are left on an ashtray, for example, and it is therefore desirable to reduce any sidestream smoke. Improvements in the composition of mainstream smoke affect the perception of smokers by smokers.

In the present invention, activated carbon is used to modify the properties of smoke generated from smoking articles. Naturally, activated carbon has been used for various purposes in smoking articles since its good absorbency has been known.

[0004] For example, the effect of the carbon content of filters has been described by Williams et al.
Investigated in a report submitted at the meeting of the 5th General Assembly of CORESTA in Vienna for four years.
forschung Vol. 3 part 3 ”, pp. 233-242. This report describes the change in absorption of different components of mainstream smoke by differently constructed filter pieces. In the present invention, the carbon is disposed within the tobacco rod, ie, under conditions that are different from the conditions to which the filter is exposed.

[0005] GB Patent Specification No. 1512352 discloses the use of porous activated carbon particles adsorbed on tobacco in tobacco rods to affect mainstream smoke. British Patent Specification 1348580 also discloses the use of regenerated tobacco material sheets containing activated carbon as a main component to produce cigarettes that reduce particulate matter and nicotine in mainstream smoke.

[0006] To the applicant's knowledge to date, only US Pat. No. 5,092,353 (EP-A-378774) discloses the use of carbon in tobacco rods with the intention of reducing sidestream smoke. It is. However, the U.S. patent uses a very low transmission (less than 10 Coresta units) wrapper to reduce sidestream smoke. Also, pyrolyzed alpha cellulose is present in the tobacco rod to compensate for the self-extinguishing of the cigarettes disclosed therein.

[0007] The pyrolyzed material has not been subjected to any activation treatment. No mention is made of any chemical effects that may have on smoke, and perhaps no or little if any such heat-treated material which is specifically used Is a cotton linter made of carbon having a relatively low surface area.

[0008] The present invention is therefore not limited to the use of low permeability paper, specifically paper of 10 Coresta units or less, but places activated carbon in tobacco rods to affect the chemical properties of the smoke. Doing so provides a smoking article in contrast to the prior art.

Further, in the present invention, activated carbon exhibiting a specific grain shape in the regenerated tobacco sheet is added to the tobacco rod of the smoking article, and the mainstream smoke has a mellow flavor when the smoker smokes the smoking article. At the same time, the range of air permeability of the wrapper of the smoking article is wide, so that even at high permeability, sidestream smoke is reduced without special measures to prevent self-extinguishing.

[0010] Activated carbon particles are preferably obtained from plants, since they contain trace amounts of metals that assist in strongly adsorbing aldehydes from smoke and chelate such compounds. These compounds are compounds that have a significant effect on improving the mellowness of mainstream smoke of smoked products that is perceived when smoke is absorbed by removal.

Activated carbon can also increase, but not reduce, the beneficial volatile components of smoke.

[0012] As the coal of the smoking article progresses along the smoking article, the smoke component adsorbed on the activated carbon particles, if any, comes off these particles. These smoke components disappear as gaseous oxides with the carbon particles due to the very high temperatures (up to 800 ° C.) occurring in the ember.

[0013] Regenerated tobacco sheets containing activated carbon particles are made in a manner similar to conventional papermaking techniques, after which the sheets are minced for mixing with the cut tobacco that is the material of the tobacco rod.

An important application of the present invention, however, is in hand-rolled cigarette blends, ie, tobacco blends sold in discrete tobacco leaves and smokers themselves wrapping with cigarette paper.

The present invention therefore includes within its scope blends of shredded tobacco with regenerated tobacco sheets containing activated carbon and blends of regenerated tobacco sheets with regenerated tobacco sheets containing activated carbon.

[0016] The regenerated tobacco sheet may be coated or sized to retain the carbon particles, as the carbon particles may be lost due to chopping or subsequent operation by the machine or smoker, In particular, the carbon particles themselves may be microencapsulated before being mixed into the sheet material. In the latter case, it is advantageous to increase the size of the particles, so that they are mechanically retained in the sheet material and the size is homogenized, but their activity is not affected. Example 1

A mixture of fire-dried tobacco and Burley tobacco from the United States, cut-rolled stalks, and expanded tobacco were processed and cut to 32 cuts per inch to make cigarettes. 20% equally cut, containing 30% activated carbon particles obtained from coconut having an average particle size of 37 μm and a particle size in the range of 0.5 μm-150 μm
% Of the regenerated tobacco sheet was incorporated into the minced tobacco. A control cigarette was produced in the same manner as the cigarette above, except that the addition of the activated carbon particles was omitted.

These cigarettes were 84 mm long and 7.9 mm in diameter, and were not provided with a filter. The wrapping paper used was a paper having a support of 80 Coresta units of flux containing 2% of potassium citrate as a combustion promoter.

These cigarettes were smoked with a standard smoking machine, and the vapor phase and semi-volatile content of the mainstream smoke were analyzed. The results are shown in Tables 1 and 2.

As is evident from Table 1, certain aldehydes and ketones and acrolein and butyraldehyde, the removal of these compounds, which are important in imparting a mild flavor to the smoke, were selectively significantly reduced. On the other hand, there is an increase in certain components, especially limonene, which is considered to be beneficial for taste, as compared with the standard value.

As is evident from Table 2, it is similarly reduced, if not very selective. Example 2

The cigarette and the control cigarette were prepared using the same tobacco blend and regenerated tobacco sheet used in Example 1. The wrapping paper used had a transmittance of 25, 50, 80 and 180 Coresta units. Sidestream smoke from the cigarettes of the present invention and the control cigarettes was significantly reduced in semivolatiles and nicotine content as shown in Table 3. The increase in carbon monoxide and carbon dioxide is presumed to be due to the presence of particulate carbon contained in the tobacco sheet.

[0023]

[Table 1]

[0024]

[Table 2]

[0025]

[Table 3]

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE , KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW (72) Inventors Sampson, John Roger UK, Hertfordshire Air 74 EU, Welwyn Garden City, Walnut Grove 74 F Term (Reference) 4B043 BB22 BC02 BC07 4B045 AA07 AA41 AB07

Claims (8)

[Claims] 1. A tobacco rod comprising chopped tobacco and a chopped regenerated tobacco sheet, wherein the reconstituted tobacco sheet comprises activated carbon particles, a wrapper wraps the tobacco rod, and the wrapper comprises at least 20 Coresta units A smoking article characterized by having a transmittance. 2. The smoking article according to claim 1, wherein said activated carbon particles are obtained from a plant. 3. The smoking article according to claim 2, wherein said plant is coconut. 4. The smoking article according to claim 1, wherein the average particle size of the activated carbon particles is 37 μm. 5. The method according to claim 1, wherein said tobacco and the regenerated tobacco sheet containing activated carbon particles for a tobacco rod of a smoking article are made of a material having a transmittance of at least 20 Coresta units as a wrapping paper for said smoking article. A method of producing a smoking article having reduced sidestream smoke and increased mellowness perceived during smoking. 6. The method of claim 5, wherein the smoking article is made by hand winding. 7. The method according to claim 5, wherein the aldehyde content in the mainstream smoke is selectively reduced. 8. A sidestream smoke comprising a cut regenerated tobacco sheet comprising tobacco and activated carbon particles for a tobacco rod of a smoking article, wherein the cigarette wrapper comprises a material having a permeability of at least 20 Coresta units. A kit for manually winding a smoking article having reduced odor and increased mellowness perceived during smoking.