CZ57496A3 - Ventilated cigarette with filter - Google Patents

Abstract

A ventilated filter cigarette has a multiple filter with a higher global retention provided in different sections with ventilation perforations. The ventilated filter cigarette contains a tobacco mixture of expanded tobacco having a high nicotine content. The tobacco mixture contains as constitutive element expanded tobacco lamina with a nicotine content from 1.0 % to 8 % and/or tobacco foil with a nicotine content from 5 % to 10 %, to which fruit acid is incorporated. The tobacco mixture has a nicotine content from 2.5 % to 5 %. The resistance to draw of the multiple filter is higher at the tow side than at the mouth side, and the degree of ventilation lies in a range from 50 % to 95 % added air. The main smoke flow preferably has an "American blend" taste with an approximately constant taste per puff. The pH value of the smoke lies in a range from 6.0 to 7.5. While giving good sensory results, the cigarettes have condensate and nicotine values respectively of less than 1 mg/cigarette and 0.1 mg/cigarette and in special cases of less than 3 mg/cigarette and less than 0.6 mg/cigarette.

Description

Ventilated cigarette with filter

Technical field

The invention relates to a ventilated filter cigarette.

BACKGROUND OF THE INVENTION

DE-OS 3228950 discloses a ventilated cigarette with a filter having a partially activated (i.e., expanded) tobacco blend having a nicotine content of 2-5%. This cigarette contains a low efficiency filter with a maximum efficiency rating of 35%. The value of the condensates is, according to the examples, between 7 and 17 mg of tar, i.e. condensate.

DE-OS 3638801 discloses a ventilated filter cigarette having a substantially constant retractable taste. This is achieved by the use of a separate filter material which, with increasing vapor content of the main smoke stream, is more passable for the incoming ventilation air.

EP-A2 0283672 describes the doping of cigarette tobacco with nicotine and levulic acid or nicotine levulate. The condensate content of the ventilated filter cigarettes thus produced must be below 7 mg of tar.

In addition, known and possibly commercially available filter cigarettes whose condensate (K) and nicotine (N) values are equal to or below 1 mg K and 0.1 mg N have also been reported until the time of filing.

For example, a NOW cigarette from REYNOLDS / USA with a condensate value <0.5 mg, a DUNHILL ULTIMATE cigarette

Rothmans LIGHTS · with less than 1 mg tar, 0.1 mg nicotine. However, such cigarettes are rated by most consumers as deserving of a taste enhancement, which can be deduced from both the significantly lower market share of these cigarettes and internal smoking tests.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ultra-light filter cigarette which, in comparison with the prior art, maintains an almost constant, qualitatively good taste offering at low overall condensate and nicotine levels while reducing all undesirable smoke constituents in mainstream and secondary smoke. to a minimum, using conventional, cost-effective materials used, especially without complicated filter technology.

SUMMARY OF THE INVENTION

The solution to this problem is achieved by the features of the main claim, wherein particularly advantageous embodiments are set forth in the dependent claims.

For example, any undesirable substances contained in the smoke can be reduced to the minimum with the combination according to the invention, while the smoker-like flavors, including nicotine, still surprisingly satisfy the light smoker. Objectively unexpected effect: value eg K <1 mg / N <0.1 mg, subjectively: totally satisfying appetite volume - it could be contributed to by the fact that again on the first pull is provided almost constant taste condensate value as 1, where the amount of condensate provided for retraction versus the number of retractions is plotted. This is not the case with previously known ultralight cigarettes and this could contribute to their rejection.

It is believed that said surprising effects are achieved in part by using preferably the so-called INCOM method (expansion method according to DE 2903300, DE 3119330 and DE 3414625 of the applicant) of sparingly obtained high volume activated tobacco in conjunction with conventional filters of a certain retention capacity . This provides an approximately constant supply of condensate for retraction as shown in Fig. 1.

The INCOM-bulk activated tobacco is characterized in particular by maintaining the cellular structures of the tobacco fibers to an extent that is not the case with other known methods. Cell structures similar to other methods of activated tobacco are severely damaged and may result in substantial loss of aroma and nicotine, which is not the case with INCOM tobacco. Here, the relevant flavorings, nicotine and minor alkaloids are always made available, i.e. they can be transferred particularly easily with very small amounts of air or mainstream smoke.

It is believed that this comparatively effective aroma and nicotine mobility, especially INCOM-tobacco, works advantageously at an extremely low amount of air which is drawn through a refractory gel (Glutkegel) in the highly ventilated cigarette of the invention. It is also believed that significantly different from conventional cigarettes, generally low string retention due to lower lower stuffing density and proportional to low retraction resistance, results in a still hard cord of the cigarette of the invention, not prone to collapse, contributing to maintaining an unexpectedly high full taste volume of ultralight cigarettes.

Finally, an unexpectedly high full taste at the lowest values could be achieved by using a part of the invention representing a particularly highly scavenging filter whose retention power or efficiency is determined by the total entrapped components (condensate and nicotine) based on the amount of flowing substance. This multiple filter, also called a multifilter or a combination filter, consists of at least two different, possibly with a gap (cavity filter), mutually arranged filter portions or filter sections, which are made in different, different filter materials and thus differently absorbing different substances It is possible to influence the taste, especially in connection with this taste effect adapted to the high degree of ventilation.

Usually, unacceptable, high retraction or suction resistance is obtained for ultra-light segment cigarettes with non-ventilated filters with higher retention, and for highly ventilated filter cigarettes with the same segment filter and therefore acceptable retraction resistance, often only warm air, i.e. mainstream smoke This is avoided in the cigarette according to the invention in an unexpected manner.

Compared to the available cigarettes, the significantly lower weight of the tobacco used in the cigarette according to the invention naturally also provides a correspondingly reduced side stream of smoke. This desired effect can be enhanced by using a commercially available or some by-stream smoke-reducing cigarette paper, for example cigarette paper according to DE 3802645 and DE 3802646 of the Applicant, as well as a corresponding smaller size cigarette format. Thus, in one particularly preferred embodiment, a smokable article is provided which, due to its reduced mainstream and secondary smoke emissions, retains the habit of the cigarette generally close to the smoke-free cigarette substitute but without its material load and complicated manufacturing technology.

Preferably, the tobacco mixture as a whole is subjected to a blowing or expansion process. In this case, the volume of the mixture is increased and, corresponding to the initial volume, a corresponding increase in the filling capacity of the tobacco mixture is obtained. Above all, only the laminate-fraction, respectively, is blown. undamaged cellular material containing tobacco or bulk activated, normal foil tobacco, if mixed, does not. By expanding the composite blend of expandable lamina-tobacco and non-expandable film tobacco, the internally intermixed, finely cut tobacco portions are subjected together to both mechanical and thermal treatment.

Apparently, time-dependent migration of nicotine from the foil tobacco, or from nicotine-containing lamina-tobacco to less nicotine-containing lamina-tobacco, is thus effected, so that a homogeneous distribution of nicotine in the tobacco mixture is achieved. While this procedure is more expensive, it contributes to maintaining a constant flavor of the mainstream smoke during smoking of the cigarette. However, it can also only be subjected to the blowing process only a part of the tobacco mixture, such as lamina-tobacco, the non-blown portion for stuffing the mixture may consist of conventional or technical tobacco such as rib cuts. The latter can serve, for example, to stimulate the reactivity of the cigarette according to the invention, as well as to the addition of known perfume and flavoring agents which contribute to the overall taste characteristics of the cigarette. Furthermore, the addition of perfuming and flavoring agents may be carried out before or after the blowing or expansion processes. The finished tobacco blend is then processed in a known manner on conventional cigarette machines with the addition of a multiple claimed filter to a cigarette with a filter of the invention.

In one embodiment of the tobacco mixture under otherwise identical preparation conditions, the use of film tobacco is completely dispensed with so that the entire final tobacco mixture is volumetrically activated. Natural tobacco with a content of 6% by weight is used. % nicotine, in particular cases up to 8 wt. nicotine.

The following examples illustrate the invention.

DETAILED DESCRIPTION OF THE INVENTION

Example A

Made of tobacco blend with the character of American Blend, formed

33% Air Cured-Tobacco 28 % Flue Cured-Tobacco 14 % Orient 25 % foil tobacco

with an average nicotine content of 3.4%, which is combined (i.e. after mixing) by volume INCOM - in a manner with a filling capacity increase of 60%, cigarette ropes (diameter 7.9 mm, length 59 mm) with the weight of tobacco used are produced 460 mg and total weight including cigarette paper 500 mg. The stuffing density of the cigarette strand is 160 mg / cm 2 and the hardness of the cigarette (measured according to the method of DE-OS 3929155) is 2.25 mm of the penetration depth. The porosity of cigarette paper is around 40 CORESTA.

These strands are fitted with double filters (PAPER / ACETATE) and attached by means of non-porous wrapping paper in the usual way with filter cigarettes. PAPER is herein referred to as a commercially available cellulosic fleece filter, and ACETATE is a conventional cellulose acetate fiber filter. The pulling resistance of the 12 mm long PAPER filter section on the strand side is 175 daPa, and the pulling resistance of the 13 mm long ACETATE filter section from the mouth is 15 daPa. According to DIN 6565, the filter perforation produced by laser perforation has a ventilation degree of 77% of the added air.

Ί

The smoking data of this Al cigarette (measured according to DIN-ISO 3402/4387/10315 / 10362-1) is summarized in Table 1. The pH value of the smoke was also measured according to Harris et al. (32 ⁿ d TOb.Che.Res.Conf., 1978) of the method described.

Table 1 below shows the corresponding values for cigarettes A2 and A3, which differ from the cigarette A1 only by the filter. Also in these cases, a double PAPER / ACETATE filter with a 13 mm length from the side of the strand and a 13 mm length from the mouth, but with different stretching resistances and different degrees of ventilation, was also used.

Table 1

Filter data and cigarette smoking data according to Example A cigarette Al A2 A3 stretch resistance PAPER-FILTER SECTION (daPa) 175 94 175 stretch resistance ACETATE-FILTER SECTION (daPa) 15 Dec 50 50 degree of ventilation (% at- aeration) 77 84 78 number of stretches 5.7 6, 0 5, 5 Condensate (K) (mg) 0, 2 0.2 0.1 nicotine (N) (mg) 0, 05 0, 04 0, 02 K / N 4 5 5 pH-value of smoke 7.0 - - Sensory finding of all of three cigarettes was at least

comparable, with a tendency to preference compared to available ultra-light cigarettes with K-values > 1 mg.

Example B

Made of tobacco blend with the character of American Blend, formed

40 % Air Cured-Tobacco 20 May % Flue Cured-Tobacco 15 Dec % Orient 25 % foil tobacco

with an average nicotine content of 3.6%, which is totally activated (ie after mixing) by volume INCOM-

increase fulfilling abilities O 55 % are made cigarette rope (average 7.9 mm, length 59 mm) weight of tobacco used mg and p total weight including cigarette paper mg. The density of stuffing this

the cigarette string is 155 mg / cnP and the hardness of the cigarette (measured according to the method of DE-OS 3929155 is 2.4 mm penetration depth. The porosity of the cigarette paper is 40 CORESTA.

These strands are provided with double filters (PAPER / ACETATE) and attached by means of a non-porous wrapping paper in a manner similar to a laser-perforated cigarette and, as in Example A, a 12 mm long strand of PAPER filter from the strand side and a 13 mm long ACETATE filter from the oral side. The smoking data of the three cigarettes B1, B2 and B3, which differ from each other by the filter section resistance and the degree of ventilation, are summarized in Table 2.

Table 2

Filter data and cigarette smoking data of Example B cigarette B1 B2 B3 stretch resistance 175 94 94

PAPER-FILTER SECTION (DAPa) RESISTANCE AT LOAD 15 50 50

ACETATE filter section (daPa) degree of ventilation (% aeration) 77 84 88 number of draws 5.2 5.8 6.0 condensate (K) (mg) 0.2 0.3 0.1 nicotine (N) (mg) 0.04 04.04.01 K / N 5 7.5 10

The sensory finding of all three cigarettes was generally comparable to the available ultra-light cigarettes with values of ≥ 1 mg, and the cigarettes of Example B even appeared to be stronger (more reactive) than commercially available ultralight cigarettes.

Example C

From an American Blend tobacco blend consisting of 50% Air Cured% Flue Cured% orient with an average nicotine content of 3.5%, which together (i.e., blended) is volume activated by INCOM in a manner that increases the filling capacity by 60%, cigarette ropes (diameter 7.9 mm, length 59 mm) with a weight of tobacco of 420 mg and a total weight including cigarette paper of 460 mg are made. The plugging density of the cigarette strand is 145 mg / cm 2 and the hardness of the cigarette (measured according to the method of DE-OS 3929155) is 2.4 mm of penetration depth. The porosity of the cigarette paper was 40 CORESTA.

These strands are provided with double filters (PAPER / ACETATE) and fixed by means of a non-porous wrapping paper in the manner customary for laser-perforated cigarettes with a filter analogous to Example A also with a 12 mm long strand section of the PAPERfilter.

Table 3 shows the cigarette smoking data of Example C.

Table 3

Filter data and cigarette smoking data according to Example C cigarette_C stretch resistance 95

PAPER-FILTER SECTION (daPa) RESISTANCE WHEN STRENGTH 15

ACETATE-filter section (daPa) degree of ventilation (% aeration) 62 number of stretches 5.1 condensate (K) (mg) 1.40 nicotine (N) (mg) 0.20

K / N 7

The sensory finding of these cigarette cigarettes was generally surprisingly comparable to the available lights cigarettes with K-values from 4 to 7 mg and corresponding nicotine values, with the cigarettes of Example C appearing to be stronger (more reactive) against some of the available lights cigarettes.

Claims (9)

PATENT CLAIMS 1. A ventilated multi-filter cigarette having a generally higher filtration retention, wherein the filter is provided with a wrapper which is itself air impermeable but has in places ventilation openings which also enclose a tobacco strand deposition area formed of a tobacco blend, containing nicotine-containing tobacco, puffed-up or volume-activated, that is to say expanded tobacco, the cigarette thus assembled provides a nearly constant appetite for retraction, characterized by a combination of the following features: a) a lamina-tobacco blend in which a predominant proportion, preferably a total fraction or fraction thereof, of the lamina-tobacco mixture; the final blend is processed according to the known blowing or expansion process, preferably the INCOM method, wherein the filling capacity of the tobacco mixture is in the range between 4.0 cm ³ / g and 7.5 cm ³ / g, where the filling capacity of pure laminar-tobacco is increased to an area between 5 cm ³ / g and 8 cm ³ / g, wherein the lamina-tobacco has a nicotine content of from 1.0% to 8.0%, preferably from 1.5% to 6.0% of the lamina-tobacco dry matter, and wherein the nicotine content of the tobacco blend is generally between 2.5% and 5%, preferably 3.5%, of the dry weight of the tobacco mixture, b) a cigarette strand having a stuffing density of not more than 200 mg / cm ³ , preferably 125-175 mg / cm ³ , (c) a multiple filter, preferably a double filter, with a higher draw resistance on the strand side and a lower draw resistance on the oral side, the overall degree of filter efficiency being in the range 60 to 90%, preferably in the range 80% to 99¾; the filter is preferably laser perforated and shows ventilation stage in area 50 % to 95 % accessory preferably in the region 60 % and z 95 % accessory air, particularly preferably in the region 70 Q. O up to 95% additional air, d) - mainstream smoke preferably with taste American Blend, - smoke pH 6.0 to 7.5, v ýhodně 7.0, - low condensate (K) and nicotine (N) values, with K <3 mg / cigarette, preferably K <1 mg / cigarette and N <0.6 mg / cigarette, preferably N <0.1 mg / cigarette, and a K / N mainstream smoke ratio of < 10, preferably 5. A ventilated cigarette according to claim 1, characterized in that the tobacco mixture comprises film tobacco, the lamina-tobacco having a nicotine content of from 1.0% to 2.5%, preferably from 1.5% to 2.0 % of the lamina-tobacco dry matter and the foil tobacco have a nicotine content of from 5% to 10%, preferably from 8.5% of the foil tobacco dry matter, wherein the foil tobacco additionally contains incorporated tobacco of its own fruit acid in the range of 3% to 10% wherein the preferred tobacco proper acid is malic acid. A ventilated cigarette according to claim 1 or 2, characterized in that the cigarette paper has a porosity of 10 to 60 CORESTA, preferably 40 CORESTA. A ventilated cigarette according to claim 1 or 2, wherein the cigarette paper is a sidestream smoke reducing paper with a porosity of 10 10 CORESTA. A ventilated cigarette according to any one of claims 1 to 4, characterized in that the tobacco mixture as a whole is subjected to a blowing or expansion process. at A ventilated cigarette according to any one of claims 1 to 4, characterized in that only the lamina-tobacco or the bulk of the mixture is subjected to a blowing or expansion process and then blended foil tobacco or the remainder of the tobacco mixture, which may also contain tobacco ribs. A ventilated cigarette according to any one of claims 1 to 6, characterized in that the multiple filter is configured as a ventilated hollow chamber filter, the passing perforation zone extending over the hollow chamber and preferably being a laser perforation. A ventilated filter cigarette according to any one of claims 1 to 7, characterized in that the cigarettes have a conventional format having a diameter of 7.8 to 8.1 mm and a length of 80 to 100 mm. A ventilated cigarette according to any one of claims 1 to 7, characterized in that the cigarettes have a smaller size format with a diameter of 4 to 7.7 mm and a length of 30 to 79 mm.