KR20010034343A - Smoking articles - Google Patents

Abstract

Use in the tobacco rod of a smoking article of tobacco mixed with a reconstituted tobacco sheet which includes activated carbon particles, surrounded by a paper of CORESTA 20 permeability or greater results in an article having reduced sidestream smoke and selective reduction of certain ingredients in mainstream smoke, whereby the smoker has a perception of increased smoothness.

Description

Smoking article {SMOKING ARTICLES}

The live tobacco smoke may be unpleasant to the non-smoker, in particular when the cigarette is placed in an ashtray, for example, the reduction of which is preferred. Changes in direct smoke affect the smoker's perception of the item.

The present invention utilizes activated carbon to change the smoke of smoking articles. Of course, activated carbon has been used in smoking articles and for a variety of purposes since virtually its excellent adsorption is known.

For example, the effects of various carbon contents in filters have been investigated by Williams et al. In a report submitted by the 5th General Assembly of CORESTA, Vienna, October 1964, and published in Beitrage zur Tabakforschung, Vol. Trial of 3 part 3, pages 233-242. The report shows the various adsorption properties of different components of direct drinking smoke by different pieces of filter pieces. However, the inventors have found that disposing carbon on tobacco rods; In other words, there is an interest in placing carbon in a state very different from that in the filter.

GB-A-1512352 shows the use of activated porous particles of carbon attached to tobacco in tobacco rods to affect direct drinking smoke. GB-A-1348580 shows a sheet of reconstituted tobacco material containing activated carbon which is used as the main material for producing cigarettes which achieves a reduction of particles and nicotine in direct drinking smoke.

As far as the present inventors are aware, the only patented technology using carbon in tobacco rods in situations where the aim is to reduce live tobacco smoke is US-A-5092353 (EP-A-378774). However, the purpose of this patented technology is to reduce live tobacco smoke by the use of wrapping paper with very low permeability (<10 CORESTA units). To compensate for the tendency for cigarettes to self-extinguish, pyrolyzed alpha-cellulose is present in the tobacco rod.

This pyrolyzed material is not subjected to activation treatment. No chemical effect this could have on the smoke is mentioned, and in certain instances the thermally decomposed material will probably have little or no effect since it is a cotton linter which gives a relatively low surface area of carbon.

FIELD OF THE INVENTION The present invention relates to smoking articles, such as cigarettes, cigars and small cigars, and to the reduction of live tobacco smoke from smoking articles. Tobacco smoke is smoke that is produced when an item is burned but is not absorbed by the smoker. Direct drinking smoke is smoke generated when a smoking article is sucked by a smoker; The chemical properties of direct smoke and live tobacco smoke are different.

Therefore, the present invention contrasts with all these prior art by providing the tobacco rod with activated carbon that affects the chemistry of the smoke, while not limited to the use of low permeability papers, in particular <10 CORESTA papers.

In addition, the present invention recognizes that the milder taste of a smoking article is perceived in smoke that is consumed directly by the smoker, while at the same time taking no particular care to prevent the self-extinguishing of the article over the wide porosity of the article wrapper Sufficient porosity provides for the addition of activated carbon in the form of specific particles in the reconstituted tobacco sheet to the tobacco rod of the smoking article in such a way that a reduction in live tobacco smoke occurs.

In addition, the activated carbon particles should preferably be of vegetable origin, since they contain traces of metals that can help the solid adsorption of aldehydes (especially) from smoke and actually chelate these compounds. Removal of these compounds is particularly important for improving mild taste perception of articles in smoking.

At the same time, however, activated carbon does not decrease and may even increase certain beneficial volatiles in the smoke.

As the "coal" of the smoking article progresses along the article, it is important to recognize that the smoke component adsorbed by the particles is minimally replaced, even if replaced by such particles. They break down into oxide gas together with the material of the carbon particles themselves by the extremely high temperatures (up to about 800 ° C.) produced from coal.

Reconstituted tobacco sheets containing activated carbon particles can be made by conventional techniques for making such sheets, which techniques are similar to conventional papermaking techniques, and the sheets are then incorporated with shredded tobacco to be the material of tobacco rods. Will be sewed for.

An important application of the present invention, however, will be "smoker-directed" tobacco blends, ie those sold commercially without packaging and wrapped in cigarette paper by smokers.

The present invention therefore encompasses a blend of shredded tobacco and reconstituted tobacco sheets within the scope of the present invention, the latter containing activated carbon.

Handling the sheet, whether sedan or at a later operation by a machine or smoker, can result in the loss of carbon particles and the reconstituted tobacco sheet can be coated or sized to help retain the particles therein, in particular the particles themselves can be incorporated. Prior to micro-encapsulation. The latter has the advantage of increasing the particle size to increase mechanical retention and size uniformity, but perhaps surprisingly will not affect their activity.

Example 1

Cigarettes are made from a mixture of US yellow species and Burley tobacco, cut dried stems, inflating tobacco, processing and cutting to 32 cuts per inch (cpi). 20% of the reconstituted tobacco sheet, equally cut and containing 30% of the activated carbon particles from the coconut with an average particle size of 37 μm and a particle size ranging from 0.5 μm to 150 μm, is incorporated into the shredded tobacco. Control cigarettes are prepared identically except activated carbon particles.

The cigarette is 84 mm long, 7.9 mm in diameter and without a filter. Lapping is 80 CORESTA flax-base paper, with 2% potassium citrate combustion enhancer.

Cigarettes were smoked in a standard smoker and direct smoke was analyzed for vapor phase and semi-volatile content and the results are shown in Tables 1 and 2.

As shown in Table 1, a selective significant reduction of certain aldehydes and ketones, in particular acrolein and butyraldehyde, occurs and their removal is important for a mild taste. On the other hand, certain ingredients that are thought to be beneficial for taste, especially limonene, have actually increased compared to the standard.

Although less selective, a similar reduction is seen for semi-volatiles as shown in Table 2.

Example 2

Cigarettes and control cigarettes were prepared using the same tobacco blend and reconstituted tobacco sheets as in Example 1, but using paper of 25, 50, 80 and 180 CORESTA unit porosity, respectively. As shown in Table 3, both the semi-volatile and nicotine contents were significantly reduced in the live tobacco smoke from the cigarettes of the present invention and the control cigarettes. Increased carbon monoxide and carbon dioxide production is believed to be due to the presence of carbon particles in the tobacco sheet.

Claims (8)

A smoking article having a tobacco rod comprising a blend of shredded tobacco and shredded reconstituted tobacco sheets containing activated carbon particles and a wrapper having a permeability of at least 20 CORESTA around the tobacco rod. The article of claim 1, wherein the activated carbon particles are of vegetable origin. The article of claim 2, wherein the vegetable origin is coconut. The article of claim 1, 2 or 3, wherein the carbon particles have an average particle size of about 37 μm. Reduced live tobacco smoke and increased awareness during smoking, including using a shredded reconstituted tobacco sheet containing tobacco and activated carbon particles for tobacco load of the article, and a material having a permeability of at least 20 CORESTA as a wrapper of the smoking article. A method for producing a smoking article having a mild taste. 6. The method of claim 5, comprising rolling the smoking article by hand. 7. A method according to claim 5 or 6, comprising preferential reduction of the aldehyde content of the direct drinking smoke. Reduced live tobacco smoke and increased perceived mildness during smoking, comprising a shredded reconstituted tobacco sheet containing tobacco and activated carbon particles shredded for tobacco load of the article, and a material having a permeability of at least 20 CORESTA as a wrapper of the smoking article. Kit for rolling by hand a smoking article with a taste.