JPH07503603A - Control of cigarette smoke chemistry - Google Patents

Abstract

A high level of flavour can be provided in cigarette smoke at a low tar level while providing a more uniform delivery of flavour and tar as the cigarette is smoked, in comparison to a conventional cigarette. A tobacco blend is employed using higher-than-normal quantities of tobacco from the upper levels of a tobacco plant, to provide an initial high flavour-to-tar ratio. A flavour reset technique is employed to attenuate the flavour strength of the smoke to the smoker, so that such attenuated but acceptable flavour level is provided at a much lower tar level. In addition, latter puff manipulation of the tobacco smoke is effected to decrease the flavour level and tar produced in the latter puffs of smoking to provide a more uniform flavour delivery. Filter element structures and other specific elements to achieve these results are described.

Description

[Detailed description of the invention] Control of cigarette smoke chemistry field of invention The present invention controls the chemistry of cigarette smoke that enters a smoker's day, resulting in a high sensory impact. The present invention relates to providing a desired combination of peel and low tar.

Background of the invention Tar is one of the components of tobacco smoke that is considered undesirable, and Various attempts have been made continually to deliver lower amounts of tar to smokers. ing. Various conventional methods include increasing ventilation and enhancing filtration, but However, with conventional filters, the pressure difference across the filter becomes unacceptably high. Only a certain level of filtration can already be achieved before

Similarly, the water that comes before the tobacco smoke imparts an unacceptable "smoking" flavor. In general, "low tar" cigarettes can only reach a semi-aeration.

Because it fails to create enough aroma in the smoke to satisfy the fff. tend to be unpopular with smokers.

Another problem encountered by smokers is that this is emitted when smoking a cigarette. Tar and aroma levels rise and rise, sometimes becoming unacceptable in late puffs. The aim is to reach a high standard.

Summary of the invention The present invention combines a variety of popular brands of cigarettes with very low tar levels. For example, this product achieves unique results by providing a high aroma level. According to Akira, while discharging 6.7 B of tar, the normal amount of tar is 14.0 mg. A cigarette is produced that emits the aroma of a regular cigarette. traditional cigarettes In addition, the present invention provides a more uniform aroma and aroma when the cigarette is smoked. This can lead to the emission of tar.

According to this feature of the invention, a novel cigarette is provided, which allows the cigarette to be consumed. Tobacco produces a relatively high aroma-to-tar ratio in the smoke produced when smoked. A tobacco filler locus containing a higher than normal proportion of tobacco derived from the upper leaves of the plant. from the burning tobacco filling rod when smoking this cigarette. cigarette smoke passes through and is delivered to the smoker at approximately the same aroma level. a smoke filtration element configured to impinge on and reduce the aroma-to-tar ratio; and The level of both aroma and tar in the smoke during the later stages of smoking the filler rod. combined with at least one of a filler rod and a filtration element for lowering; This includes the means by which it is carried out.

Brief description of the drawing FIG. 1 is a bar graph showing the results of the smoking test.

FIG. 2 is a graphical representation of the results of another smoking test.

FIG. 3 is a graphical representation of the results of yet another smoking test.

General description of the invention Applicants have determined that the ability of tobacco leaves to produce a tobacco-type aroma is due to the fact that the tobacco leaves are on top. and the ability of such leaves to produce tar also increases. However, we found that the degree of this was low. Among them, the largest leaf of the tobacco plant It has been found that the aroma-to-tar ratio of . The aroma produced by tobacco from such leaves or their tips is different from traditional tobacco. tobacco is generally unacceptably high for smokers, and therefore tobacco is usually Mixes tobacco from whole objects to give an overall low aroma tobacco blend That's what I do. Applicants use such highly aromatic tobacco, and Not only does it reach a fragrance level comparable to that of popular brands, but it also The higher aroma-to-tar ratio of smoke produced by cigarettes has a lower level of of tar can be discharged.

On the other hand, if desired, lower or the same tar water can be used even at higher aroma levels. It can also be given as standard.

Assigned to the present assignee and filed on April 19, 1991, the disclosure is Correspondingly pending U.S. Patent Application No. 867, incorporated herein by reference; No. 742 (European Patent Publication EPO 453,299) has a high filtration level. The use of non-absorbable fine fibers in a tubular form has been described to achieve . Such fine fibers reduce the aroma level produced by the tobacco. It can be used here as well. As described in it, the cylinder The fine fibers therein typically each have a diameter of about 0.5 to 10 microns. . Such fiber tubes generally have a thickness of about 0.05 to about 411II11 and about It has a specific gravity of 0.05 to about 0.3 g/cc.

Smoke aerosols passing in contact with such filter media are bombarded onto the non-absorbent fibers. It wets the tar particles and deposits them on the fibers, but also leaves the aroma The same is true for aqueous droplets of ingredients.

The elongated cylinder of fine fibers preferably contains a filter containing the fine fiber cylinder. provided so that all passing tobacco smoke is directed by the walls of the cylinder . This results in a high density surrounding the cylinder of fine fibers surrounding the inner core. This is achieved by providing an outer annular body of the tow material of a regular acetate filter. can be done. At its upstream end there is a baffle or other means for directing the flow of tobacco smoke. provided so that smoke from the cigarette is directed only into the dense material. It has become. The second filter structure was filed on IO month 31, 1991. Assigned to assignee, the disclosure of which is incorporated herein by reference. currently supported PCT Publication No. 752,595 (PCT Publication W. O90109741).

As described in it, its fine fiber cylinder is a highly effective filter media. However, it quickly becomes occluded, so the cigarette smoke cannot escape from the normal tow material. It is necessary to pass through a passage of increased length as a side ring, and thereby The inner axial direction of the fine fibers passes through the cylindrical wall and continues to the downstream end of the filter element. is filtered before entering the smoke flow path.

Second, this filter filters out the cigarette smoke when smoking progresses. Achieving a degree of filtration and thus reducing the aroma and tar that is introduced as smoking progresses tend to reduce the rise in emission levels and therefore deliver aroma more evenly to the smoker. I can put it out.

radially inward of the cylinder of fine fibers as also described in that application. The axial flow path for tobacco smoke is made of low flow resistance acetate material. may be filled, and this also has a tobacco smoke stream at its upstream end. Alternatively, the smoke into the axial flow path may be crimped against the The influx may be provided by crimping at the upstream end of the fine fiber cylinder.

In another construction, the axial passage of tobacco smoke inside the radially inner elongated tube of fine fibers The channel may be provided by an elongated plastic tube with a star-shaped cross section. the fine fibers that allow the tobacco smoke to flow in the longitudinal direction of the cigarette. A plurality of channels may be defined radially inside the tube.

Even more filtration efficiency between the first puff and the last puff.

an outer annulus of ordinary tow passing through the tube adjacent to the upstream end of the tube of fine fibers; by providing one or more openings extending between the can be elevated, whereby a substantial portion of the cigarette smoke in the first puff is Its highly efficient tow travels only a short distance through the material, and then mainly enters the axial channel through the opening, passes through the fine fibers and bypasses the As the smoke progresses, it reaches these apertures and is trapped in the highly efficient tow material adjacent to the apertures. As the cigarette progresses, it becomes less and less as the cigarette is smoked. Become. This filter of the applicant's U.S. patent application Ser. No. 752.595 mentioned above. By providing a modified type, the smoke of the first puff of a cigarette is extremely small. Only smoke filtration occurs, while the last puff of smoke from that cigarette is filtered through highly efficient tow material. filtration both through long distances and through fine fibers through which the smoke can pass.

such as having one or more openings through the tube of fine fibers adjacent the upstream end of the tube. This variation of the filtration element is one of the novel filters provided in accordance with one aspect of the invention. Configure the data structure. Therefore, in this aspect of the invention, tobacco smoke is filtered using filter media. An elongated outer cylinder, an elongated inner cylinder of fine fibers, and a radially inward direction of the fine fiber cylinder. an axial passage for tobacco smoke provided at the has greater resistance to the flow of tobacco smoke through the The tube then has at least one tube adjacent to and passing through the second end of the filtration element. opening, thereby allowing the initial smoke of the cigarette to which the filtration element is attached. Between the smoke, tobacco smoke passes from the outer tube through the at least one opening. is preferentially flowed into the axial passage, and the filtration element is installed. Tobacco smoke from the cigarette is directed only into the outer cylinder of the tobacco smoke filter medium. provided at the upstream end of the filtration element in the desired flow direction of tobacco smoke. and means for directing a flow path of tobacco smoke. It will be done.

In one alternative configuration, the core of the filtration element is provided with a conventional high-density tow material; The outer annular body is provided with a low-density tow material or is made of such a fibrous material. may not be provided at all. In this case, cigarette smoke baffles or other smoke channel directing means are again used to direct the smoke into the central wick. provided. This filter element constitutes another feature of the invention. Therefore, the present invention in a further feature provides a tobacco smoke filtration element, which A slender stopper of tobacco smoke filter media and a slender stopper provided above the above slender stopper to pass through it. In contrast to the radial flow of tobacco smoke, the elongated stopper is passed longitudinally. an elongated tube of non-absorbent fine fibers that has a lower resistance to flow than the above elongated tube; located on the radially outer side of the barrel and above the longitudinal flow of tobacco smoke within it. an axially oriented tube having a lower resistance than passing longitudinally through the elongated plug described above. an annular tobacco smoke flow path, and a tobacco smoke flow path thereto at the upstream end of said filtration element. The filter on which the filtration element is attached is placed in the desired flow direction of the smoke. To direct the tobacco smoke from the tobacco only into the elongated plug of the tobacco filter medium. and cigarette smoke flow path directing means.

in the second novel filter structure, nearer to the downstream end of the filter than usual. The filter has ventilation holes inside the filter envelope to improve carbon monoxide (CO) dispersion. You can do both. Venting generally means that the CO content enters the smoker's mouth. decrease.

Niko uses tobacco with a higher aroma/tar ratio than usual, which is due to its burning This, however, creates a higher than normal aroma level in the smoke from a cigarette. By using a tube of fine fibers, the burning cigarette is removed from the smoker's mouth. The aroma level of the tobacco smoke reached is reduced to normal levels. However, that tab Since tobacco produces smoke with a higher aroma-to-tar ratio than normal, this same ratio is of smoke reaches the smoker's mouth, thereby significantly lower tar of cigarettes, while the same flavored water as in regular high-flavor brand cigarettes. standard is achieved.

This result is achieved without having to rely on high pressure differential filtration or excessive aeration. However, these both result in lower levels of aroma emissions and are therefore not recommended to smokers as explained above. tar lower in aroma levels to smokers, which is undesirable for reasons such as The two possibilities of giving the level are extremely diverse, leading to all desired result combinations. Give possibilities.

In order for the tobacco aroma to reach the smoker uniformly from the cigarette, it is important to Provides a greater proportion of higher aroma tobacco towards the burning end, and A larger proportion of tobacco with a lower aroma level is added towards the filter end of the cigarette. This can be improved by providing As mentioned before, cigarettes Therefore, the aroma intensity produced increases as the smoking progresses. To provide a greater proportion of less aromatic tobacco towards the filter end This effect tends to be more suppressed.

A filler rod containing a combination of different flavored tobaccos is transferred to one of the assignees. U.S. Pat. No. 4,896, the disclosure of which is hereby incorporated by reference. No. 681. Unlike this, that Employing discontinuous individual compartments of tobacco with different aromas within the filling section rondo. You can also do it. Using a less aromatic blend in expanded tobacco form is preferable, since expanded cigarettes contain more of the various components of smoke than non-expanded cigarettes. This is because they tend to result in a greater degree of filtration.

Therefore, the present invention allows lower levels of tar to reach the smoker with a more uniform aroma emission. A combination of the following factors can produce cigarettes that exhibit high sensory appeal as well as 1) initially provides a high aroma-to-tar ratio; This is then added to the smoke delivered to the smoker, but at an acceptable diluted level. of force on tobacco plants, preferably from their tips, such that tobacco is maintained A larger amount than usual is used in the tobacco blend that forms the cigarette. 2) The aroma level and temperature of the cigarette in the latter stage of smoking. Preparation operation (manupu fat 1 on ), and 3) Reset the aroma intensity to lower the smoke aroma level to the level desired by the smoker. It is to use.

Manipulation of the aroma and tar during the late puff of cigarette smoking This can be done by using the technique of smoke path filtration, as described above, or by using a filter. or preferably by using a weaker tobacco at the tobacco end. This is done by using both. Resetting the fragrance intensity is described above. By using a tube of fine fibers as the filter element or at the filter side end. or preferably by using a lower strength tobacco on the filter side. by using expanded tobacco at the end, or preferably a combination thereof. This is achieved by using Preferably all these factors are used, and A fine fiber cylinder is used in the smoke passage changing filter, and a special fiber cylinder is used at the filter side end. Use a higher percentage of expanded tobacco with less aromatic flavor, and Using a higher proportion of higher aroma tobacco than usual with a high aroma to tar ratio use

Example Takumi Yu Smoking a cigarette constructed according to the principles of the present invention and standard popular in Canada Blind smoking test comparing branded cigarettes (Benson & Hedges 100s) I did it.

The cigarette of the present invention has a good aroma at the initial stage of puffing, and has a good impact and effect. It has been found to produce a fuller, smoother, more balanced smoke. This volume Very little aroma, impact, stimulation and aroma balance in the second half of the tobacco. The cigarettes of the present invention are generally of the standard brand. It was preferable to

■Yu A smoking test was conducted on each cigarette that was the subject of the smoking test in Example 1. Same scent Intensity was measured for total tar, nicotine and CO.

The results are shown in the form of a bar graph in Figure 1, and Benson & Hetjis's cigarettes are "B". & 11”, and the cigarette of the present invention is indicated by “II-S”. Ru. As can be seen, at the same aroma level, tar The standard value has increased from 14.0B to f3.7mg, which is 48% of the standard for cigarettes. nicotine decreased by 57% from 1.2 mg to 0.68111 g, and the As a result, CO decreased from 14.0 mg to 10.0 mg hair 1%.

Jeongyu A smoking test was conducted to investigate the effects of various manipulations of cigarettes. 1 puff The tar content per serving was plotted against the number of puffs. The obtained results are the second It is shown as a graph in the figure.

Standard Benson & Hetzis 100s (B & II) cigarettes (curve 3 ) is for a total of 13.1mg initial tar water! ′! ! From 0.5 mg to the end The tar level in a single dose has risen to 1.8 mg. High fragrance using standard filter Curve 5 was obtained from Penson & Hetjis cigarettes when using only cigarettes. At that time, the tar content is calculated based on the total tar discharge of 22.5 mg. From the 1.0 mg level to the final dose of 3.0 mg, the standard B&11 bra It rose more than twice that emitted by those in India.

This highly aromatic tobacco is placed in one section at the lighting end of the rolled cigarette, and then the expanded tobacco is placed in one compartment. One section was provided at the end of the filter. Standard B & 1 (filter used again. This volume Curve 4 was obtained for tobacco. In this case, the total tar content is 12.5 mg from an initial level of 0.9 mg for the last puff to 1.9 mg for the last puff. This is the 0 song M4 and the song which is well below the one about high aroma tobacco mentioned above. Comparison with line 5 shows that expanded tobacco is placed on the filter side end of the filling rod of one cigarette. The significant improvement in tar emissions that can be achieved using one compartment is shown.

Both curves 4 and 5 show a significant droop in tar emissions during the interphase puff, confirming this theory. I don't know why, but this is a characteristic of all cigarettes to some degree.

The height used to replace the standard B&H filter with a fine fiber tube to yield curve 5 Flavored tobacco was used again. In this case, curve 2 is the total tar discharge Ji 10.1 m From 3.0 to 1.7 mg while smoking g By comparing 0 curve 2 and curve 5, which showed a slight increase, the normal filter can be refined. The presence of fiber tubes and their replacement have a significant impact on tar emissions. It is shown that the sound is given.

Finally, it has a filter containing a tube of fine fibers, and an expanded tobacco at the filter side end. The tar emission status from a cigarette containing one section of is shown in curve l. slightly At a total tar discharge of 4.7 mg, tar increases from 0.2 B of the first -i to the highest The dose rose to 0.9 mg in the next dose.

Comparison of curve 1 and curve 4 shows that the filter contains a tube of fine fibers instead of a regular filter. 1 curve l and 1 show the effect of using a filter on tar emissions Comparison with Curve 3 shows that the main smoke compared to a standard cigarette emitting the same aroma level. The effect on tar emissions when using cigarettes constructed according to Ru. Low level of tar emissions per puff and very low total tar emissions Not only is this achieved, but in the case of the present invention the curve is also flatter; A more uniform discharge of tar and aroma is achieved.

挌1 A smoking test was conducted to examine the effects of different manipulations of cigarettes. 1 puff The tar content per serving was plotted against the number of puffs. The results obtained are the third It is shown as a graph in the figure.

Curves 1 and 3 release a total of 16 + ag of tar manufactured in Canada. Obtained using 84II 1m Rothman King size (R3K'') cigarettes. The obtained results are transferred to a fine fiber tube with several openings through the tube at the upstream end. Comparison is made with a cigarette using a filter containing It is.

Comparison of curve I and curve M3 reveals a low level of tar emissions per seed. Not only are very low total tar emissions achieved, but in the case of the present invention The curve of is also flatter and therefore a more uniform discharge of tar and aroma is achieved. It is shown that For comparison, curves 1 and 3 in Figure 2 are changed to curve 4 in Figure 3. 3 and 3 are reprinted respectively.

Disclosure summary To summarize the present disclosure, the present invention provides a rich aroma at very low tar levels. A variety of methods within the scope of the present invention provide a novel tobacco structure capable of providing Variations are possible.

Fragrance intensity tar Figure 1A Figure 1B Procedural amendment February 8, 1994

Claims (26)

[Claims] 1. Below, i.e. Provides a relatively high aroma-to-tar ratio in the smoke produced when smoking cigarettes A type of tobacco that contains a higher than normal proportion of tobacco derived from the upper leaves of the tobacco plant. Bako filling part rod, Tobacco from the burning tobacco filler rod when smoking a second cigarette of smoke passed through and delivered to the smoker by approximately the same aroma vs. a smoke filtration element configured to attenuate while maintaining a smoke filter ratio; and Both the aroma and the tar in the smoke during the later stages of smoking in the filling part of the rod combination with at least one of a filler rod and a filtration element to reduce the and the means by which New cigarettes containing 2. The level of both aroma and tar in the smoke is such that the filling element is The rolled tab according to claim 1, wherein Ko. 3. The claimed filtration element comprises as a component thereof a cylinder of non-absorbable fine fibers. Range 1 cigarette. 4. The fine fibers within the tube each have a diameter of about 0.5 to about 10 microns. The cigarette according to claim 3. 5. The tube of fine fibers has a thickness of about 0.5 to about 0.0 mm and about 0.05 to about 0.0 mm. ．． The cigarette of claim 4 having a specific gravity of 3 g/cc. 6. The tobacco filling rod has more aroma toward the lighting end of the cigarette. A larger proportion of high-quality tobacco and more toward the media end of the cigarette. Claims 1, 2, 3, 4 or 5 containing a larger proportion of tobacco with low aroma is a 5 street cigarette. 7. The above-mentioned tobacco filling rod has a higher aroma as it moves toward the lighting side end of the cigarette. of tobacco in a larger proportion and towards the edge of the filter medium of the cigarette. containing a greater proportion of tobacco with a lower aroma, and with a lower aroma. Claims 1, 2, 3, 4 or 5, wherein the blend is provided in expanded tobacco form. rolled cigarette. 8. The above-mentioned tobacco led from the upper leaves of the tobacco plant is placed at the tip of such leaves. A cigarette as claimed in claim 1, 2, 3, 4 or 5 thus provided. 9. In cigarette smoke filtration elements, this is as follows: A long and narrow stopper for cigarette smoke filter media, installed on the elongated plug to prevent the flow of tobacco smoke in the radial direction through it. Non-absorbent fine particles having a lower resistance than passing through the elongated stopper in the longitudinal direction. A long thin tube of fiber, Located on the radially outer side of the elongated tube and directed to the flow of tobacco smoke in the longitudinal direction within it. axially, which has a lower resistance than passing through the elongated plug in the longitudinal direction. an annular tobacco smoke flow path directed thereto, and at the upstream end of the filtration element; the installation of its filtration element in the desired direction of flow of tobacco smoke; In order to direct the tobacco smoke from the cigarette only into the elongated plug of the tobacco filter medium. cigarette smoke flow path directing means; including the above tobacco smoke filtration elements. 10. The elongated cap of cigarette smoke filter media is a regular cellulose acetate tow filter media. The filtration element of claim 9. 11. A buff is provided at the upstream end of the filter medium in the tobacco smoke flow path directing means. 11. A filtration element according to claim 10, wherein said filtration element is provided with filter means. 12. The above annular flow path for cigarette smoke is made of cellulose acetate material with low flow resistance. The filtration element of claim 10 as provided. 13. To promote the dispersion of carbon monoxide in the cigarette smoke flowing in the annular channel. A plurality of vent openings are provided through the outer packaging in communication with the annular channel to allow the filter to The filtration element according to claim 12, further comprising a filter element. 14. At least one opening adjacent the upstream end of the filtration element extends through the elongated tube. filtration element, thereby ensuring that the cigarette to which the filtration element is attached is During the first smoke, tobacco smoke from said elongated stopper passes through said at least one opening. Claims 8, 9, 10, 11 or 12 filtration elements. 15. A means is provided at the downstream end of the filtration element to block the flow path of tobacco smoke so that the filter Claims that allow evaporated tobacco smoke to flow only from the annular passageway. 10 filtration elements. 16. Below, i.e. an elongated outer cylinder of cigarette smoke filter material; an elongated inner cylinder of fine fibers, an axial passage for tobacco smoke provided radially inward in the tube of fine fibers; The outer tube of the smoke filter media is then oriented in the axial direction relative to the flow of tobacco smoke through it. has a greater resistance than the passage, The tube has at least one opening adjacent to and passing through the upstream end of the filtration element. during the initial smoking of a cigarette in which its filtration element is attached. cigarette smoke passes from the outer tube through the at least one opening to the axial direction. allow preferential flow to the opposite passage, and Tobacco smoke from the cigarette to which the filtration element is attached Tobacco is placed at the upstream end of the filter element to direct it only into the outer tube of the filter media. means for directing the flow path of the tobacco smoke in a desired flow direction of the smoke; Cigarette smoke filtration elements, including: 17. The outer tube of the cigarette smoke filter is a regular cellulose acetate tow filter. The filtration element of claim 16. 18. said tobacco smoke flow path directing means at said upstream end of said filtration element; 18. The filtration element of claim 17 provided by baffle means of. 19. The above axial passage of tobacco smoke is made of cellulose acetate material with low flow resistance. The filtration element of claim 17 as provided. 20. The low flow resistance cellulose acetate material is attached to one end of the filtration element. 20. The filtration element of claim 19, wherein the filtration element is crimped against a stream of tobacco smoke. 21. The axial passage of the cigarette smoke is an elongated plastic tube with a star-shaped cross section. This is provided by the pipe, which allows the tobacco smoke to flow in the longitudinal direction of the cigarette. A plurality of channels are provided inside the tube of the fine fibers in the axial direction so that the fine fibers can be 18. The filtration element of claim 17. 22. Means for blocking the flow path of tobacco smoke is provided at the downstream end of the filtration element. , thereby ensuring that the filtered tobacco smoke flows only through its axial flow path. 18. The filtration element of claim 17, which allows. 23. Claims wherein the elongated cylinder of fine fibers is crimped at its upstream end. Box 17 filtration element. 24. The fine fibers in the tube of the filter element each have a diameter of about 0.5 to about 10 microns. Claims 9, 10.11, 12, 13, 14, 15, 16 having a diameter of , 17, 18, 19, 20, 21, 22 or 23 filtration element. 25. The tube of fine fibers has a thickness of about 0.5 to about 4 mm and about 0.05 to about 4 mm. 25. The filtration element of claim 24, having a specific gravity of up to about 0.3 g/cc. 26. The tobacco smoke filtering element and the level lowering means are provided in claim 9 or 16. The cigarette of claim 1 provided by a filtration element.