EP1843670B1 - Filter cigarette - Google Patents

Filter cigarette Download PDF

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Publication number
EP1843670B1
EP1843670B1 EP06700443A EP06700443A EP1843670B1 EP 1843670 B1 EP1843670 B1 EP 1843670B1 EP 06700443 A EP06700443 A EP 06700443A EP 06700443 A EP06700443 A EP 06700443A EP 1843670 B1 EP1843670 B1 EP 1843670B1
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EP
European Patent Office
Prior art keywords
filter
cigarette
anyone
gas phase
tobacco
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP06700443A
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German (de)
French (fr)
Other versions
EP1843670A1 (en
Inventor
Gunther Peters
Paul-Georg Henning
Thomas Pienemann
Henning Seidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reemtsma Cigarettenfabriken GmbH
HF and PhF Reemtsma GmbH and Co
Original Assignee
Reemtsma Cigarettenfabriken GmbH
HF and PhF Reemtsma GmbH and Co
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Application filed by Reemtsma Cigarettenfabriken GmbH, HF and PhF Reemtsma GmbH and Co filed Critical Reemtsma Cigarettenfabriken GmbH
Priority to PL06700443T priority Critical patent/PL1843670T3/en
Priority to SI200631466T priority patent/SI1843670T1/en
Publication of EP1843670A1 publication Critical patent/EP1843670A1/en
Application granted granted Critical
Publication of EP1843670B1 publication Critical patent/EP1843670B1/en
Revoked legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters

Definitions

  • the invention relates to a filter cigarette.
  • the smoke of cigarettes is composed of a particle and a gas phase.
  • Many commonly used filters filter the smoke with cellulose acetate.
  • the gas phase is often not lowered to a satisfactory extent, so often other design features are adjusted. For example, it is common to provide cigarettes with a relatively high ventilation, which causes the gas phase to be additionally diluted with air.
  • Another possibility of additional gas phase reduction is the use of gas phase-active, that is reducing the gas phase, substances in the filter.
  • gas phase-active that is reducing the gas phase, substances in the filter.
  • Filter cigarettes are known from the prior art, which influence the tobacco smoke with the aid of gas-phase-active substances in such a way that the amount of gas phase in the mainstream smoke inhaled by the smoker is reduced.
  • filter cigarettes are on the market whose gas phase values are reduced by the addition of gas phase active substances, such as activated carbon.
  • gas phase active substances such as activated carbon.
  • Activated carbon filters in which the activated carbon is introduced into a chamber be have been used for a long time and especially in Japan and are from the WO 02/37990 A2 or known from other documents such as the DE 42 056 58 A1 or the WO 00/49901 A1 ,
  • the filter consists of a filter segment with activated carbon and a filter segment with ion exchange resins and optionally a mouth-side filter segment of cellulose acetate. Comparable cigarettes are in the WO 03/015544 A1 and the WO 2004/103099 A2 described.
  • Gas phase reduction is also influenced by the combination of the design parameters of a filter cigarette, which includes not only the filter additives, but also the nature of the tobacco, the wrapping material and the filter components.
  • the gas phase is not lowered to a satisfactory extent.
  • the values for the total gas phase content G ges are more than 1200 ⁇ g / cigarette, measured according to ISO.
  • a further disadvantage is that conventional gas-phase active cigarette filters lose their effectiveness after a certain storage time.
  • the cigarettes of the prior art are often added further substances either in the tobacco mixture or in the filter, such as palladium to tobacco as in the WO 02/37990 A1 ,
  • the disadvantage here is the high costs and difficult manufacturing conditions.
  • WO 02/069745 A1 discloses a cigarette with a multi-component filter.
  • the filter ventilation in this cigarette is in the range of 40% to 60%, in particular 45% to 55%, and the NFDPM value in the range of 4 to 10 mg.
  • the object of the invention is to provide a filter cigarette with a significant gas phase reduction of the tobacco smoke. This gas phase reduction should also be given under so-called intense smoking conditions (see below).
  • the gas phase efficiency of the filter should be as long as possible, e.g. the period of storage of cigarettes, be constant or at least only slightly change.
  • the filter cigarette according to the invention has a tobacco rod, a filter and a wrapper (preferably made of cigarette paper, filter wrapping paper and tipping paper).
  • the filter contains a filter material matrix with gas phase reducing substances.
  • the tobacco of the tobacco rod is preferably made of an American Blend blend or a Virginia blend.
  • the tobaccos of the tobacco blend are preferably with an additive content below 1% non-volatile fractions, based on the tobacco dry matter; most preferably no additives are used.
  • the tobaccos are preferably selected so that the TSNA content (TSNA: tobacco-specific nitrosamines) of the total mixture is less than 2 ⁇ g / g tobacco. It is even more advantageous if the content of TSNA in the tobacco is below 1 ⁇ g / g of tobacco.
  • the tobacco may contain additives or additives such as casing, flavorings, humectants, sugar, cocoa, liquorice, menthol.
  • the cigarette paper surrounding the tobacco rod is preferably porous and has a porosity of more than 40 CU (Coresta Units) or more than 60 CU. To achieve particularly low NFDPM values (see below) in the range of 4-7 mg / cigarette, the porosity is preferably greater than 300 CU.
  • the naturally porous cigarette paper can additionally be electro-perforated, mechanically perforated or laser-perforated.
  • the cigarette paper preferably contains a relatively high mullet salt content to lower the CO content in the smoke.
  • Usual Glimmsalzmengen are at 0.7%. Glimmsalzmengen of 1.3% or more, preferably 2% are used according to the invention. Preferably, sodium / potassium citrates are used.
  • the basis weight of the cigarette paper is preferably lower than conventional comparable cigarettes and is 22 g / m 2 .
  • the filter may for example consist of one, two, three, four or five filter sections and preferably has two filter sections. If the filter has more than one filter section, a filter section is preferably arranged on the mouth side, which does not contain any substances which reduce the gas phase. Different gas phase reducing substances can be introduced in one or in different filter parts. In the case of several filter parts, these can be arranged longitudinally one behind the other or else arranged coaxially.
  • the filter material (the matrix and others) contains, for example, cellulose, cellulose derivatives (preferably cellulose acetate), polymers such as polyolefins (polypropylene, polyethylene), polyesters or mixtures thereof.
  • the filter material consists for example of fibers, tow, paper, fabric web, non-woven, nonwoven, extrudate, foam.
  • the filter material is preferably crimped, treated and / or treated with further filter additives, such as e.g. Catalysts or flavoring additives, e.g. Flavors or sugars.
  • further filter additives such as e.g. Catalysts or flavoring additives, e.g. Flavors or sugars.
  • the gas phase reducing substances are incorporated (e.g., interspersed or by an airlaid method) into a filter material matrix in an amount of at least 75 mg per filter and at least 5 mg / mm length of the gas phase active filter part.
  • gas phase reducing substances for example, activated carbon, alumina, aluminum hydroxide, ion exchangers (preferably ion exchange resins), molecular sieves, silica gel, natural or synthetic minerals such as magnesium silicate, alumina, zeolites, bentonites, kieselguhr or meerschaum can be used.
  • the gas phase reducing substances which are introduced into the filter preferably have a high surface area in the range of more than 1000 m 2 / g, preferably 1000-1200 m 2 / g measured by BET method and / or a CCl 4 uptake of 60%. 70% based on the weight of the gas phase reducing substance.
  • the filter wrapping paper envelops the filter parts. It can be porous or nonporous.
  • the tipping paper or wrapping paper connects the filter to the tobacco rod. It can be either naturally porous, mechanically or electroperforated or laser perforated.
  • the filter is preferably laser-perforated online, that is, during cigarette manufacture after the filter is attached to the tobacco rod.
  • the filter ventilation is between 0% and 30% and is preferably between 10% and 25%. In other embodiments, the filter ventilation is in the range of 30% to 70%, preferably in the range of 30% to 60%.
  • the gas phase of cigarette smoke is a complex mixture of permanent gases such as N 2 and CO 2 and a variety of light and medium volatile compounds. Some of these components are associated with the health effects of smoking. For example, formaldehyde, hydrocyanic acid and benzene are mentioned in the warning texts prescribed for Germany on cigarette packs.
  • gas phase reducing substances such as e.g. Activated carbon
  • adsorbents such as e.g. Activated carbon
  • the content of permanent gases, e.g. CO remains largely unchanged.
  • a measure was to be found that describes the effectiveness of such adsorbents as unaffected as possible by other design features.
  • the gas phase is specifically influenced such that the ratio Q 1 is below the values measured for commercial cigarettes, namely below 1.5, measured according to ISO smoking conditions.
  • Q2 is preferably below 3, measured after intense smoking conditions.
  • Intense smoking conditions are in accordance with the Health Canada Official Method T-115, "Determination of Tar, Nicotine and Carbon Monoxide in Mainstream Tobacco Smoke", conditions as set forth in Section 14 (6) (b) (modified conditions ) of the Canadian Federal Tobacco Regulations.
  • This method uses an increased draft volume (55 ml / 2 seconds) and a reduced draft break (28 seconds) with full coverage of the filter ventilation zone, see http://www.hc-sc.gc.ca/hecs-sesc/tobacco/pdf/T-115e4.pdf.
  • Cytotoxicity was determined for the examples below according to the method presented at the Coresta Congress New La 2002 (Röper, W., Wieczorek, R .: In-vitro cytotoxicity of cigarette mainstream smoke. smoke aerosol exposure).
  • the tests were performed with HEP-G2 cells (human hepatocellular carcinoma).
  • serum-free medium was prepared with the gas phase of the cigarettes according to the invention. The cells were incubated with this medium for 65 h. Subsequently, proliferation tests were carried out and EC50 values were determined.
  • EC50 is the effective concentration of a substance or mixture that causes 50% growth inhibition of cells.
  • NRU test In the Neutral Red Uptake Cytotoxicity Assay (NRU) test, proliferation is measured based on the membrane activity of the living cells. NRU test protocols have been published by ECVAM, FRAME, CAAT, INVITOX, and IC-CVAM. The tests in the examples were after the INVITOX Protocol No. 64. (1992) "The neutral red cytotoxicity assay "Performed.
  • MTS test Oleen reagent's, Promega kit, cell proliferation assay
  • MTS test CellTiter 96 ® AQ ueous Non-Radioactive Cell Proliferation Assay (MTS) from Promega GmbH).
  • the determination of the gas phase components in the mainstream smoke of the filter cigarettes was carried out in the examples by means of GC-FID.
  • a 20-channel smoking machine from Borgwaldt (RM 20 / CS) was equipped with 20 cigarettes and a 92 mm glass fiber filter for separating the moisture condensate.
  • the test cigarettes were previously conditioned according to ISO 3402. 20 cigarettes were smoked according to ISO 3308, the wet condensate was deposited on the glass fiber filter and the gas phase was passed to the smoke machine pump.
  • a sampling valve defined traits were taken from different cigarettes for the subsequent analysis and collected in a glass jar.
  • GC-FID conditions were as follows: injector temperature 110 ° C; Split 80 ml / min .; Carrier gas helium, 1.7 ml / min .; Column 0.5 ⁇ m DB Wax 60 m ⁇ 0.32 mm; Temperature program: 20 ° C, 1 ° / min. up to 28 ° C; 2 ° C / min. up to 60 ° C; 20 ° / min. up to 110 ° C; Temperature FID 200 ° C.
  • Quantification was performed for the following gas phase components: isoprene, acetaldehyde, propionaldehyde, furan, i-butyraldehyde, acetone, acrolein, methylfuran, butanone, methanol, benzene, butenone, dimethylfuran, diacetyl, acetonitrile, hydrogen cyanide, and toluene.
  • the indication of the results is in ⁇ g of the respective gas phase component per cigarette. The measurement was carried out as a double determination.
  • the total gas phase G ges is the sum of the values of the gas phase components listed above.
  • NFDPM Nicotine free dry particulate matter; is commonly referred to as "tar” or condensate value.
  • the ratio of CO to NFDPM is less than 1.
  • the TSNA levels in the smoke are related to the NFDPM levels and are preferably below 15 ng / mg NFDPM, especially below 13 ng / mg NFDPM.
  • the NO content is preferably below 50 ⁇ g per cigarette.
  • the amount of the gas phase substances preferably represented as total gas phase G tot , is significantly reduced.
  • Ratios Q1 and Q2, representing the ratio of benzene to CO, are below the limits of 1.5 for Q1 (measured by ISO) and 3 for Q2 (measured after Intense).
  • the cytotoxicity of the gas phase is significantly lowered in the cigarette according to the invention both under ISO smoking conditions and under intense smoking conditions compared to conventional cigarettes.
  • the TSNA values in the smoke of the cigarettes according to the invention are low in comparison with conventional filter cigarettes, this applies both to ISO and to intense smoking conditions. They are preferably below 50% of the values of conventional filter cigarettes.
  • Example 1 For the variant in Example 1, a Virginia Blend tobacco blend was prepared without additives. As a comparison, a commercial cigarettes brand was examined with Virginia blend blend.
  • the tobacco rod was wrapped with a cigarette paper having a porosity of 50 CU and provided with a bleaching salt content of 1.3% sodium / potassium citrate and whose basis weight was 22 mg / m 2 .
  • the strand was followed by a two-part filter, in the strand-side filter part, 15 mm in length, 75 mg of activated carbon were introduced.
  • the mouth-side filter part was made of cellulose acetate.
  • the filter was surrounded by a filter wrap paper.
  • the tobacco rod was connected to the filter by a wrapping paper.
  • a filter ventilation of 25% was set.
  • Table 2 shows the values determined both for inventive and for the comparative cigarettes, which were fumigated either to ISO or intense conditions (CINT) with a covered ventilation zone.
  • the total gas phase G tot is significantly lower in the inventive cigarette than in the comparison.
  • Q1 is 1.4 below the desired limit 1.5 and Q2 is 2.5 below the desired limit 3.
  • the product according to the invention was compared in a field study with a commercially available product with similar nicotine, condensate and CO values. Fifty smokers first smoked the comparison product (commercial cigarette with comparable tobacco blend), then the product according to the invention for six weeks and finally the comparison product again for six weeks.
  • the subjects lived under everyday conditions, there were no restrictions on consumption and smoking behavior. Every three weeks, the subjects were examined for the levels of various biomarkers (metabolites of smoke constituents) in body fluids.
  • Example 2 For the version in Example 2, an American Blend tobacco blend was also made entirely without any additive. As a comparison, a commercial cigarette brand with American Blend mixture was examined.
  • the filter consisted of a pure cellulose acetate filter section and a 15 mm long strand section of cellulose acetate, into which 5 mg activated charcoal were introduced per mm, so that the filter contained a total of 75 mg activated charcoal.
  • the cigarette paper of the cigarette according to the invention had a porosity of 320 CU and a basis weight of 35 g / m 2 .
  • the mulled salt content for this version was 2.0% sodium / potassium citrate.
  • the filter was surrounded by a filter wrap paper.
  • the tobacco rod was connected to the filter by a wrapping paper.
  • Cigarettes according to Example 1 were stored for a period of 12 months. After 3 months, the gas phase values were re-determined under ISO smoking conditions. It was observed that the effectiveness of the cigarette filters remained largely stable with respect to the total gas phase G tot . The amount of the total gas phase after 3 months was only 3.6% more than the amount of the total gas phase determined on freshly prepared filter cigarettes. After 6 months another became Increase of only 4.1%. The decrease in effectiveness by less than 10% within 6 months is extremely beneficial. ⁇ u> Table 4 ⁇ / u> Example 3 0 3 months 6 months Total gas phase ug / cig 910 943 982
  • the cigarettes according to Example 4 correspond to the cigarettes according to Example 1.
  • the tobacco of the tobacco strand was selected so that the TSNA content was below 1 ⁇ g / g tobacco, namely 0.4 ⁇ g / g tobacco.
  • Table 5 ⁇ / u>
  • Example 4 Cigarette according to the invention comparison Abrauchnorm ISO ISO Tobacco chloride % 0.4 0.9 Tobacco nitrate % 0.2 0.5 Tobacco TSNA ug / g 0.4 1.1 variety of tobacco Virginia Virginia Smoke NO ul / Cig. 42,00 71.00 Smoke TSNA ng / cig. 65.0 142.0 Smoke TSNA ng / mg NFDPM 7.0 15.4
  • the smoke of the cigarettes according to example 1 was examined with regard to its TSNA values and NO values.
  • Table 5 are compared these values compared to a conventional cigarette.
  • the TSNA content in the smoke is 54% lower compared to the conventional cigarette.
  • test cigarettes of Examples 1 and 2 were smoked under both ISO and intense smoking conditions and the cytotoxicity of the gas phase was determined according to NRU and MTS tests.
  • EC50 values of the gas phases were determined.
  • the values of toxicity are given in percent decrease in toxicity relative to a commercially available comparison cigarette with comparable NFDPM values and comparable tobacco mixtures. It can be seen from the table that the cytotoxicity of the test cigarettes is significantly lower for all samples tested than for the corresponding comparison cigarettes.
  • the cigarettes were smoked according to ISO conditions and the gas phase was examined.
  • the cigarettes were also smoked in intense conditions and the gas phase examined. Under both smoking conditions, the cytotoxicity was significantly lower in the cigarettes according to the invention than in the comparison.
  • Example 2 toxicity ISO CINT ISO CINT Decrease in membrane toxicity (NRU) in% 45.0 47.0 95.0 72.0 Decrease in metabolic toxicity (MTS) in% 76.8 52.2 85.0 77.0
  • Example 6 For the version in Example 6, an American Blend tobacco blend was also made entirely without any additive. As a comparison, a commercial ultra-cigarette brand was examined.
  • the filter consisted of a pure cellulose acetate filter section and a 15 mm long strand section of cellulose acetate, into which 5 mg activated charcoal were introduced per mm so that the filter contained a total of 75 mg activated charcoal.
  • the cigarette paper of the cigarette according to the invention had a porosity of 50 CU and a basis weight of 22 g / m 2 .
  • the mulled salt content for this version was 1.3% sodium / potassium citrate.
  • the filter was surrounded by a filter wrap paper.
  • the tobacco rod was connected to the filter by a wrapping paper.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

The invention relates to a filter cigarette comprising a length of tabacco, an enveloping and a filter. Said filter comprises at least one gas-phase active filter part, which contains the at least one gas-phase reducing substance. Said gas-phase reducing substances are embedded in a filter material matrix. Said substances are introduced in an amount of at least 75 mg per filter and at least 5 mg/mm of the length of the gas phase active filter part. Said filter cigarette comprises a filter ventilation of a maximum of 30 % (or from 30 % - 70%). The NFDPM-value lies in the region between 4 and 10 mg/cigarette (or in the region of 2 - 4 mg/cigarette), which is measured according to the ISO-smoking conditions. The gas phase quotient Ql, which is defined as (µg benzol per cigarette) / (mg CO per cigarette), which is measured according to ISO-smoking conditions, is below 1,5, preferably below 1.

Description

Die Erfindung betrifft eine Filtercigarette.The invention relates to a filter cigarette.

Der Rauch von Cigaretten setzt sich aus einer Partikel- und einer Gasphase zusammen. Bei vielen herkömmlich verwendeten Filtern wird der Rauch mit Hilfe von Celluloseacetat gefiltert. Die Gasphase wird dabei oft nicht in zufrieden stellendem Maße abgesenkt, daher werden häufig weitere Konstruktionsmerkmale angepasst. Zum Beispiel ist es üblich, Cigaretten mit einer relativ hohen Ventilation zu versehen, die bewirkt, dass die Gasphase zusätzlich mit Luft verdünnt wird. Eine weitere Möglichkeit der zusätzlichen Gasphasenreduktion ist der Einsatz von gasphasenaktiven, das heißt die Gasphase reduzierenden, Substanzen im Filter. Zur Ermittelung der Gasphasensubstanzen im Cigarettenrauch werden Cigaretten meist nach ISO-Norm abgeraucht. Werden alternative Abrauchbedingungen gewählt, wie es z.B. unter Intense-Abrauchbedingungen (siehe Definitionen weiter unten) in Canada üblich ist, liegen die Gasphasenwerte deutlich höher.The smoke of cigarettes is composed of a particle and a gas phase. Many commonly used filters filter the smoke with cellulose acetate. The gas phase is often not lowered to a satisfactory extent, so often other design features are adjusted. For example, it is common to provide cigarettes with a relatively high ventilation, which causes the gas phase to be additionally diluted with air. Another possibility of additional gas phase reduction is the use of gas phase-active, that is reducing the gas phase, substances in the filter. To determine the gas phase substances in cigarette smoke cigarettes are usually smoked to ISO standard. If alternative smoking conditions are chosen, e.g. under intense smoking conditions (see definitions below) in Canada, gas phase values are significantly higher.

Aus dem Stand der Technik sind Filtercigaretten bekannt, die mit Hilfe von gasphasenaktiven Substanzen den Tabakrauch so beeinflussen, dass die Menge der Gasphase im durch den Raucher inhalierten Hauptstromrauch reduziert wird.Filter cigarettes are known from the prior art, which influence the tobacco smoke with the aid of gas-phase-active substances in such a way that the amount of gas phase in the mainstream smoke inhaled by the smoker is reduced.

Zum Beispiel sind Filtercigaretten auf dem Markt, deren Gasphasenwerte durch den Zusatz von gasphasenaktiven Substanzen, wie zum Beispiel Aktivkohle, reduziert sind. Aktivkohlefilter, bei denen die Aktivkohle in eine Kammer eingebracht wird, werden seit langem und insbesondere in Japan häufig eingesetzt und sind aus der WO 02/37990 A2 oder aus weiteren Schriften bekannt wie z.B. der DE 42 056 58 A1 oder der WO 00/49901 A1 .For example, filter cigarettes are on the market whose gas phase values are reduced by the addition of gas phase active substances, such as activated carbon. Activated carbon filters in which the activated carbon is introduced into a chamber, be have been used for a long time and especially in Japan and are from the WO 02/37990 A2 or known from other documents such as the DE 42 056 58 A1 or the WO 00/49901 A1 ,

Bei dem Produkt "Advance" besteht der Filter aus einem Filtersegment mit Aktivkohle und einem Filtersegment mit Ionenaustauscherharzen sowie optional einem mundseitigem Filtersegment aus Celluloseacetat. Vergleichbare Cigaretten sind in der WO 03/015544 A1 und der WO 2004/103099 A2 beschrieben.For the product "Advance", the filter consists of a filter segment with activated carbon and a filter segment with ion exchange resins and optionally a mouth-side filter segment of cellulose acetate. Comparable cigarettes are in the WO 03/015544 A1 and the WO 2004/103099 A2 described.

Die Gasphasenreduktion wird zudem beeinflusst von der Kombination der Designparameter einer Filtercigarette, wozu nicht nur die Filteradditive, sondern auch die Beschaffenheit des Tabaks, des Umhüllungsmaterials sowie der Filterkomponenten gehören.Gas phase reduction is also influenced by the combination of the design parameters of a filter cigarette, which includes not only the filter additives, but also the nature of the tobacco, the wrapping material and the filter components.

Allen genannten Vorbenutzungen oder Vorbeschreibungen ist jedoch gemein, dass bei den beschriebenen Cigaretten die Gasphase nicht in einem zufrieden stellenden Maße abgesenkt wird. Bei marktüblichen Cigaretten liegen die Werte für den Gesamtgasphasengehalt Gges (siehe unten) über 1200 µg/Cigarette, gemessen nach ISO.Common to all of the aforementioned uses or descriptions, however, is that in the described cigarettes, the gas phase is not lowered to a satisfactory extent. For commercially available cigarettes, the values for the total gas phase content G ges (see below) are more than 1200 μg / cigarette, measured according to ISO.

Oft wird eine hohe Gasphasenabsenkung nur mit Hilfe einer sehr hohen Ventilation erreicht, was dann bedingt, dass die Gasphasenwerte, wenn diese unter Intense-Abrauchbedingungen ermittelt werden, extrem erhöht sind.Often a high gas phase lowering is achieved only by means of a very high ventilation, which then implies that the gas phase values are extremely increased when they are determined under intense smoking conditions.

Ein weiterer Nachteil besteht darin, dass konventionelle gasphasenaktive Cigarettenfilter nach einer gewissen Lagerzeit an Effektivität verlieren.A further disadvantage is that conventional gas-phase active cigarette filters lose their effectiveness after a certain storage time.

Den Cigaretten nach dem Stand der Technik werden häufig entweder in der Tabakmischung oder im Filter weitere Substanzen zugesetzt, wie zum Beispiel Palladium zum Tabak wie in der WO 02/37990 A1 . Nachteilig hierbei sind die hohen Kosten und erschwerte Herstellbedingungen.The cigarettes of the prior art are often added further substances either in the tobacco mixture or in the filter, such as palladium to tobacco as in the WO 02/37990 A1 , The disadvantage here is the high costs and difficult manufacturing conditions.

Nachteilig sind auch aufwendige und teure Multifilterkonstruktionen mit einer Vielzahl unterschiedlicher Adsorbenzien oder teurer Spezialmaterialien.Also disadvantageous are complex and expensive multifilter constructions with a large number of different adsorbents or expensive special materials.

WO 02/069745 A1 offenbart eine Cigarette mit einem mehrkomponentigen Filter. In der Nähe des Tabakstrangs befindet sich ein Filterabschnitt mit einem Bett aus Aktivkohle, die in einem Hohlraum ohne Verwendung eines Matrixmaterials angeordnet ist. In Richtung auf das mundseitige Ende der Cigarette zu schließen sich weitere Filterabschnitte an, unter anderem ein Filterabschnitt, der Geschmacksstoffe freisetzt. Die Filterventilation bei dieser Cigarette liegt im Bereich von 40% bis 60%, insbesondere 45% bis 55%, und der NFDPM-Wert im Bereich von 4 bis 10 mg. WO 02/069745 A1 discloses a cigarette with a multi-component filter. In the vicinity of the tobacco rod is a filter section with a bed of activated carbon arranged in a cavity without using a matrix material. In the direction of the mouth end of the cigarette to join more filter sections, including a filter section that releases flavors. The filter ventilation in this cigarette is in the range of 40% to 60%, in particular 45% to 55%, and the NFDPM value in the range of 4 to 10 mg.

Aufgabe der Erfindung ist es, eine Filtercigarette mit einer signifikanten Gasphasenreduktion des Tabakrauches zu schaffen. Diese Gasphasenreduktion sollte auch unter so genannten Intense-Abrauchbedingungen (siehe unten) gegeben sein. Die Gasphaseneffizienz des Filters sollte möglichst über einen längeren Zeitraum, z.B. den Zeitraum der Lagerung der Cigaretten, konstant sein oder sich zumindest nur geringfügig ändern.The object of the invention is to provide a filter cigarette with a significant gas phase reduction of the tobacco smoke. This gas phase reduction should also be given under so-called intense smoking conditions (see below). The gas phase efficiency of the filter should be as long as possible, e.g. the period of storage of cigarettes, be constant or at least only slightly change.

Diese Aufgabe wird gelöst durch eine Filtercigaretten mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by a filter cigarettes with the features of claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims.

Die erfindungsgemäße Filtercigarette hat einen Tabakstrang, einen Filter und eine Umhüllung (vorzugsweise aus Cigarettenpapier, Filterumhüllungspapier und Belagpapier). Der Filter enthält eine Filtermaterial-Matrix mit gasphasenreduzierenden Substanzen.The filter cigarette according to the invention has a tobacco rod, a filter and a wrapper (preferably made of cigarette paper, filter wrapping paper and tipping paper). The filter contains a filter material matrix with gas phase reducing substances.

Der Tabak des Tabakstrangs besteht vorzugsweise aus einer American-Blend-Mischung oder einer Virginia-Mischung. Die Tabake der Tabakmischung werden vorzugsweise mit einem Zusatzmittelgehalt unterhalb von 1% nicht-verdampfbarer Anteile, bezogen auf die Tabaktrockensubstanz, versehen; besonders bevorzugt werden keine Zusatzmittel eingesetzt. Die Tabake werden vorzugsweise so ausgewählt, dass der TSNA-Gehalt (TSNA: tabakspezifische Nitrosamine) der Gesamtmischung weniger als 2 µg/g Tabak beträgt. Noch vorteilhafter ist es, wenn der Gehalt an TSNA im Tabak unterhalb von 1 µg/g Tabak liegt.The tobacco of the tobacco rod is preferably made of an American Blend blend or a Virginia blend. The tobaccos of the tobacco blend are preferably with an additive content below 1% non-volatile fractions, based on the tobacco dry matter; most preferably no additives are used. The tobaccos are preferably selected so that the TSNA content (TSNA: tobacco-specific nitrosamines) of the total mixture is less than 2 μg / g tobacco. It is even more advantageous if the content of TSNA in the tobacco is below 1 μg / g of tobacco.

Der Tabak kann Zusatzmittel oder Zusätze wie z.B. Casing, Aromastoffe, Feuchthaltemittel, Zucker, Kakao, Lakritze, Menthol enthalten.The tobacco may contain additives or additives such as casing, flavorings, humectants, sugar, cocoa, liquorice, menthol.

Das Cigarettenpapier, das den Tabakstrang umgibt, ist vorzugsweise porös und hat eine Porosität von mehr als 40 CU (Coresta Units) oder mehr als 60 CU. Zur Erreichung besonders niedriger NFDPM-Werte (siehe unten) im Bereich von 4-7 mg/Cigarette ist die Porosität vorzugsweise größer als 300 CU. Dazu kann das natürlich poröse Cigarettenpapier zusätzlich elektroperforiert, mechanisch perforiert oder laserperforiert werden.The cigarette paper surrounding the tobacco rod is preferably porous and has a porosity of more than 40 CU (Coresta Units) or more than 60 CU. To achieve particularly low NFDPM values (see below) in the range of 4-7 mg / cigarette, the porosity is preferably greater than 300 CU. For this purpose, the naturally porous cigarette paper can additionally be electro-perforated, mechanically perforated or laser-perforated.

Das Cigarettenpapier enthält vorzugsweise einen relativ hohen Glimmsalzgehalt, um den CO-Gehalt im Rauch abzusenken. Übliche Glimmsalzmengen liegen bei 0,7%. Erfindungsgemäß werden Glimmsalzmengen von 1,3% oder mehr, vorzugsweise 2% eingesetzt. Vorzugsweise kommen Natrium-/Kaliumcitrate zum Einsatz.The cigarette paper preferably contains a relatively high mullet salt content to lower the CO content in the smoke. Usual Glimmsalzmengen are at 0.7%. Glimmsalzmengen of 1.3% or more, preferably 2% are used according to the invention. Preferably, sodium / potassium citrates are used.

In einer Ausführungsform ist das Flächengewicht des Cigarettenpapiers vorzugsweise niedriger als bei konventionellen vergleichbaren Cigaretten und liegt bei 22 g/m2.In one embodiment, the basis weight of the cigarette paper is preferably lower than conventional comparable cigarettes and is 22 g / m 2 .

Der Filter kann zum Beispiel aus einem, zwei, drei, vier oder fünf Filterabschnitten bestehen und hat vorzugsweise zwei Filterabschnitte. Hat der Filter mehr als einen Filterabschnitt, ist vorzugsweise mundseitig ein Filterabschnitt angeordnet, der keine gasphasenreduzierenden Substanzen enthält. Unterschiedliche gasphasenreduzierende Substanzen können in einem oder in verschiedenen Filterteilen eingebracht werden. Bei mehreren Filterteilen können diese longitudinal hintereinander angeordnet oder auch coaxial angeordnet sein.The filter may for example consist of one, two, three, four or five filter sections and preferably has two filter sections. If the filter has more than one filter section, a filter section is preferably arranged on the mouth side, which does not contain any substances which reduce the gas phase. Different gas phase reducing substances can be introduced in one or in different filter parts. In the case of several filter parts, these can be arranged longitudinally one behind the other or else arranged coaxially.

Das Filtermaterial (der Matrix und auch anderes) enthält zum Beispiel Cellulose, Cellulosederivate (vorzugsweise Celluloseacetat), Polymere wie Polyolefine (Polypropylen, Polyethylen), Polyester oder Mischungen davon.The filter material (the matrix and others) contains, for example, cellulose, cellulose derivatives (preferably cellulose acetate), polymers such as polyolefins (polypropylene, polyethylene), polyesters or mixtures thereof.

Das Filtermaterial besteht zum Beispiel aus Fasern, Tow, Papier, Gewebebahn, Non-Woven, Vlies, Extrudat, Schaum.The filter material consists for example of fibers, tow, paper, fabric web, non-woven, nonwoven, extrudate, foam.

Das Filtermaterial wird vor dem Formen in die Filterform vorzugsweise gekrimpt, behandelt und/oder mit weiteren Filteradditiven, wie z.B. Katalysatoren oder geschmacksbeeinflussenden Zusätzen, wie z.B. Aromen oder Zuckern, versehen.The filter material is preferably crimped, treated and / or treated with further filter additives, such as e.g. Catalysts or flavoring additives, e.g. Flavors or sugars.

Die gasphasenreduzierenden Substanzen sind in eine Filtermaterial-Matrix eingebracht (z.B. eingestreut oder mittels eines Airlaid-Verfahrens) und zwar in einer Menge von mindestens 75 mg pro Filter und mindestens 5 mg/mm Länge des gasphasenaktiven Filterteils.The gas phase reducing substances are incorporated (e.g., interspersed or by an airlaid method) into a filter material matrix in an amount of at least 75 mg per filter and at least 5 mg / mm length of the gas phase active filter part.

Als gasphasenreduzierende Substanzen können zum Beispiel Aktivkohle, Aluminiumoxid, Aluminiumhydroxid, Ionenaustauscher (vorzugsweise Ionenaustauscherharze), Molekularsiebe, Silikagel, natürliche oder synthetische Mineralien, wie Magnesiumsilikat, Tonerde, Zeolithe, Bentonite, Kieselgur oder Meerschaum verwendet werden. Die gasphasenreduzierenden Substanzen, die in den Filter eingebracht werden, haben vorzugsweise eine hohe Oberfläche im Bereich über 1000 m2/g, vorzugsweise 1000-1200 m2/g gemessen nach BET-Methode und/oder eine Aufnahme von CCl4 von 60%-70% bezogen auf das Eigengewicht der gasphasenreduzierenden Substanz.As the gas phase reducing substances, for example, activated carbon, alumina, aluminum hydroxide, ion exchangers (preferably ion exchange resins), molecular sieves, silica gel, natural or synthetic minerals such as magnesium silicate, alumina, zeolites, bentonites, kieselguhr or meerschaum can be used. The gas phase reducing substances which are introduced into the filter preferably have a high surface area in the range of more than 1000 m 2 / g, preferably 1000-1200 m 2 / g measured by BET method and / or a CCl 4 uptake of 60%. 70% based on the weight of the gas phase reducing substance.

Das Filterumhüllungspapier umhüllt die Filterteile. Es kann porös oder unporös sein. Das Belagpapier oder Umwickelpapier verbindet den Filter mit dem Tabakstrang. Es kann entweder natürlich porös, mechanisch oder elektroperforiert oder laserperforiert sein.The filter wrapping paper envelops the filter parts. It can be porous or nonporous. The tipping paper or wrapping paper connects the filter to the tobacco rod. It can be either naturally porous, mechanically or electroperforated or laser perforated.

Zur Bereitstellung der Filterventilation wird der Filter vorzugsweise online-laserperforiert, das heißt während der Cigarettenherstellung nach dem Ansetzen des Filters an den Tabakstrang. Die Filterventilation beträgt zwischen 0% und 30% und liegt vorzugsweise zwischen 10% und 25%. Bei anderen Ausführungsformen ist die Filterventilation im Bereich von 30% bis 70%, vorzugsweise im Bereich von 30% bis 60%.To provide the filter ventilation, the filter is preferably laser-perforated online, that is, during cigarette manufacture after the filter is attached to the tobacco rod. The filter ventilation is between 0% and 30% and is preferably between 10% and 25%. In other embodiments, the filter ventilation is in the range of 30% to 70%, preferably in the range of 30% to 60%.

Zum besseren Verständnis der Erfindung werden im Folgenden einige Begriffe näher erläutert bzw. definiert.For a better understanding of the invention, some terms are explained or defined in more detail below.

Die Gasphase des Cigarettenrauchs ist ein komplexes Stoffgemisch aus Permanentgasen wie z.B. N2 und CO2 sowie einer Vielzahl von leicht- und mittelflüchtigen Verbindungen. Einige dieser Komponenten werden mit den gesundheitlichen Auswirkungen des Rauchens in Verbindung gebracht. So finden z.B. Formaldehyd, Blausäure und Benzol Erwähnung in den für Deutschland vorgeschriebenen Warntexten auf Cigarettenpackungen.The gas phase of cigarette smoke is a complex mixture of permanent gases such as N 2 and CO 2 and a variety of light and medium volatile compounds. Some of these components are associated with the health effects of smoking. For example, formaldehyde, hydrocyanic acid and benzene are mentioned in the warning texts prescribed for Germany on cigarette packs.

Durch Einsatz von gasphasenreduzierenden Substanzen (insbesondere Adsorbentien) wie z.B. Aktivkohle lässt sich der Gehalt vieler leicht- und mittelflüchtiger Verbindungen im Rauch reduzieren. Der Gehalt an Permanentgasen, wie z.B. CO, bleibt demgegenüber weitgehend unverändert. Zur Charakterisierung dieses Effekts sollte eine Messgröße gefunden werden, die möglichst unbeeinflusst von anderen Konstruktionsmerkmalen die Effektivität solcher Adsorbentien beschreibt.By using gas phase reducing substances (in particular adsorbents) such as e.g. Activated carbon can reduce the content of many light and medium volatile compounds in the smoke. The content of permanent gases, e.g. CO, remains largely unchanged. To characterize this effect, a measure was to be found that describes the effectiveness of such adsorbents as unaffected as possible by other design features.

Hierzu wurde im Rahmen einer internen Studie der Einfluss verschiedener Parameter auf die Gasphasenmenge und -zusammensetzüng untersucht. Es zeigte sich hierbei, dass ein Quotient aus Benzol- und CO-Gehalt im Rauch am besten zur Beschreibung der Adsorption von Gasphasenkomponenten geeignet ist. Dabei wird definitionsgemäß die Einhheit des Benzolgehaltes in µg/Cigarette angegeben und die des CO-Gehaltes in mg/Cigarette. Zum einen wird der Einfluss von Filter- und Strangventilation durch die Normierung auf den CO-Gehalt kompensiert. Zum anderen ist der Benzolgehalt in der Gasphase weitgehend unabhängig von der Tabakmischung, kann aber durch Adsorbentien nachhaltig beeinflusst werden, während CO praktisch nicht adsorbiert wird. Dieser Quotient wird für Daten, die unter ISO-Abrauchbedingungen ermittelt wurden, im Folgenden mit Q1 bezeichnet. Handelt es sich um Daten, die unter Intense-Abrauchbedingungen ermittelt wurden, wird der Quotient mit Q2 bezeichnet. Ein niedriger Wert für Q1 bzw. Q2 ist also ein Maß für eine hohe Gasphasenreduktion.For this purpose, the influence of various parameters on the gas phase quantity and composition was investigated in an internal study. It was shown that a ratio of benzene and CO content in the smoke is best suited to describe the adsorption of gas phase components. By definition, the unity of the benzene content in μg / cigarette and that of the CO content in mg / cigarette. On the one hand, the influence of filter and line ventilation is compensated by normalization for the CO content. On the other hand, the benzene content in the gas phase is largely independent of the tobacco mixture, but can be sustainably influenced by adsorbents, while CO is practically not adsorbed. This quotient will be referred to as Q1 for data obtained under ISO smoking conditions. In the case of data determined under intense smoking conditions, the quotient becomes labeled Q2. A low value for Q1 or Q2 is therefore a measure of a high gas phase reduction.

Ein weiterer Vorteil ist darin zu sehen, dass die Bestimmung von CO im Cigarettenrauch durch internationale Normen beschrieben ist. Benzol wird als Bestandteil der so genannten "Hoffman Analytes" ebenfalls häufig im Rauch bestimmt. Weitere Angaben hierzu finden sich z.B. in M.E. Counts et al. J. Regulatory Toxicology and Pharmacology 39 (2004), 111-134 .Another advantage is that the determination of CO in cigarette smoke is described by international standards. Benzene is also often detected in smoke as part of the so-called "Hoffman Analytes". Further information can be found eg in ME Counts et al. J. Regulatory Toxicology and Pharmacology 39 (2004), 111-134 ,

An gleicher Stelle finden sich Daten für Benzol und CO für eine Auswahl von Cigarettenmarken aus unterschiedlichen Ländern, von denen eine Auswahl in der Tabelle 1 wiedergegeben ist. Die Bestimmung des Filtertyps erfolgte durch eigene Untersuchungen. Es zeigt sich, dass für eine breite Spanne von Produkten mit konventionellem Filter aus Celluloseacetat (CA) der Quotient mit 3,5 bis 5,5 relativ konstant ist. Für Produkte mit Aktivkohlefilter (AK) finden sich dagegen niedrigere Werte zwischen 1,8 und 3,0. Tabelle 1 Marke Filter CO [mg/Cig] Benzol [µg/Cig] Q1 (Benzol / CO) Marlboro KS (US) CA 12,9 45,2 3,5 Marlboro KS (EU) CA 11,5 43,6 3,8 Marlboro 100 (EU) CA 11,6 43,8 3,8 Marlboro KS Lights (EU) CA 6, 4 25,9 4,0 Philip Morris One (EU) CA 2,0 11,0 5,5 Muratti Ambassador (EU) AK 7,5 17,6 2,3 Marlboro KS (Japan) AK 11,2 24,5 2,2 Parliament KS Lights (Japan) AK 7,5 15,1 2,0 Marlboro KS Lights (Japan) AK 6,8 12,8 1, 9 Omni Lights (US) AK 13,6 23,8 1,8 Advance Lights (US) AK 9,0 27,4 3,0 At the same place are data for benzene and CO for a selection of cigarette brands from different countries, a selection of which is given in Table 1. The determination of the filter type was made by own investigations. It can be seen that for a wide range of conventional cellulose acetate (CA) filter products, the quotient of 3.5 to 5.5 is relatively constant. For products with activated carbon filter (AK), however, lower values between 1.8 and 3.0 are found. <u> Table 1 </ u> brand filter CO [mg / cig] Benzene [μg / cig] Q1 (benzene / CO) Marlboro KS (US) CA 12.9 45.2 3.5 Marlboro KS (EU) CA 11.5 43.6 3.8 Marlboro 100 (EU) CA 11.6 43.8 3.8 Marlboro KS Lights (EU) CA 6, 4 25.9 4.0 Philip Morris One (EU) CA 2.0 11.0 5.5 Muratti Ambassador (EU) AK 7.5 17.6 2.3 Marlboro KS (Japan) AK 11.2 24.5 2.2 Parliament KS Lights (Japan) AK 7.5 15.1 2.0 Marlboro KS Lights (Japan) AK 6.8 12.8 1, 9 Omni Lights (US) AK 13.6 23.8 1.8 Advance Lights (US) AK 9.0 27.4 3.0

Erfindungsgemäß wird die Gasphase spezifisch dahin gehend beeinflusst, dass das Verhältnis Q1 unterhalb der bei handelsüblichen Cigaretten gemessenen Werte liegt, und zwar unter 1,5, gemessen nach ISO-Abrauchbedingungen. Q2 liegt vorzugsweise unter 3, gemessen nach Intense-Abrauchbedingungen.According to the invention, the gas phase is specifically influenced such that the ratio Q 1 is below the values measured for commercial cigarettes, namely below 1.5, measured according to ISO smoking conditions. Q2 is preferably below 3, measured after intense smoking conditions.

Die Intense-Abrauchbedingungen (CINT: Canada Intense) entsprechen der Health Canada Official Method T-115, "Determination of Tar, Nicotine and Carbon Monoxide in Mainstream Tobacco Smoke", Bedingungen wie dort in Sektion 14 (6) (b) (modified conditions) der Canadian Federal Tobacco Regulations.Intense smoking conditions (CINT: Canada Intense) are in accordance with the Health Canada Official Method T-115, "Determination of Tar, Nicotine and Carbon Monoxide in Mainstream Tobacco Smoke", conditions as set forth in Section 14 (6) (b) (modified conditions ) of the Canadian Federal Tobacco Regulations.

Bei dieser Methode wird mit einem erhöhten Zugvolumen (55 ml/ 2 Sekunden) und einer reduzierten Zugpause (28 Sekunden) bei gleichzeitiger vollständiger Abdeckung der Filterventilationszone abgeraucht, siehe
http://www.hc-sc.gc.ca/hecs-sesc/tobacco/pdf/T-115e4.pdf.This method uses an increased draft volume (55 ml / 2 seconds) and a reduced draft break (28 seconds) with full coverage of the filter ventilation zone, see
http://www.hc-sc.gc.ca/hecs-sesc/tobacco/pdf/T-115e4.pdf.

Wenn im Folgenden von ISO-Abrauchbedingungen die Rede ist, bezieht sich dies auf den ISO Standard No. 4387. Dabei beträgt das Zugvolumen 35 ml/2 Sekunden bei einer Zugpause von 58 Sekunden; die Filterventilationszone ist nicht abgedeckt.When referring to ISO smoking conditions below, this refers to the ISO standard no. 4387. The train volume is 35 ml / 2 seconds with a break of 58 seconds; the filter ventilation zone is not covered.

Die Cytotoxizität wurde für die unten erläuterten Beispiele nach der beim Coresta Congress New Orleans 2002 vorgestellten Methode bestimmt (Röper, W., Wieczorek,R.: In-vitro cytotoxicity of cigarette mainstream smoke. Evaluation of different cell exposure methods, including "native" smoke aerosol exposure). Die Tests wurden mit HEP-G2 Zellen (human hepatocellular carcinoma) durchgeführt. Für die Tests wurde serumfreies Medium mit der Gasphase der erfindungsgemäßen Cigaretten präpariert. Mit diesem Medium wurden die Zellen über 65 h inkubiert. Anschließend wurden Proliferationstests durchgeführt und EC50-Werte ermittelt. EC50 ist die effektive Konzentration eines Stoffes oder Stoffgemisches, die eine 50%-ige Wachstumshemmung von Zellen verursacht.Cytotoxicity was determined for the examples below according to the method presented at the Coresta Congress New Orleans 2002 (Röper, W., Wieczorek, R .: In-vitro cytotoxicity of cigarette mainstream smoke. smoke aerosol exposure). The tests were performed with HEP-G2 cells (human hepatocellular carcinoma). For the tests, serum-free medium was prepared with the gas phase of the cigarettes according to the invention. The cells were incubated with this medium for 65 h. Subsequently, proliferation tests were carried out and EC50 values were determined. EC50 is the effective concentration of a substance or mixture that causes 50% growth inhibition of cells.

Proliferationstests: Beim NRU Test (Neutral Red Uptake cytotoxicity assay) wird die Proliferation auf Grund der Membranaktivität der lebenden Zellen gemessen. NRU Test-Protokolle wurden veröffentlicht bei ECVAM, FRAME, CAAT, INVITOX, and IC-CVAM. Die Tests in den Beispielen wurden nach dem INVITOX Protocol Nr. 64. (1992) "The neutral red cytotoxicity assay " durchgeführt. Beim MTS Test (Owen's reagent, Promega kit, cell proliferation assay) wird die Proliferation auf Grund der metabolischen Aktivität der lebenden Zellen gemessen (CellTiter 96® AQueous Non-Radioactive Cell Proliferation Assay (MTS) von Promega GmbH).Proliferation tests: In the Neutral Red Uptake Cytotoxicity Assay (NRU) test, proliferation is measured based on the membrane activity of the living cells. NRU test protocols have been published by ECVAM, FRAME, CAAT, INVITOX, and IC-CVAM. The tests in the examples were after the INVITOX Protocol No. 64. (1992) "The neutral red cytotoxicity assay "Performed. When MTS test (Owen reagent's, Promega kit, cell proliferation assay) proliferation due to the metabolic activity of living cells is measured (CellTiter 96 ® AQ ueous Non-Radioactive Cell Proliferation Assay (MTS) from Promega GmbH).

Die Bestimmung der Gasphasenkomponenten im Hauptstromrauch der Filtercigaretten erfolgte in den Beispielen mittels GC-FID. Dazu wurde eine 20-Kanal-Rauchmaschine der Fa. Borgwaldt (RM 20/CS) mit 20 Cigaretten sowie mit einem 92 mm-Glasfaserfilter zur Abscheidung des Feuchtkondensates bestückt. Die Testcigaretten wurden zuvor gemäß ISO 3402 konditioniert. Es wurden 20 Cigaretten gemäß ISO 3308 abgeraucht, das Feuchtkondensat auf dem Glasfaserfilter abgeschieden und die Gasphase zur Pumpe der Rauchmaschine geleitet. Mittels eines Probenahmeventil wurden definierte Züge von unterschiedlichen Cigaretten für die anschließende Analyse genommen und in einem Kolbenprober aus Glas gesammelt. Unmittelbar nach dem Abrauchen wurden 6 ml der Gasprobe mit einer Probenschleife in den Injektor eines Gaschromatographen (GC) überführt, aufgetrennt und mittels FID detektiert. Als interner Standard wurde ein Prüfgas von Methan in Stickstoff verwendet. Die GC-FID-Bedingungen waren folgende: Injektortemperatur 110 °C; Split 80 ml/min.; Trägergas Helium, 1,7 ml/min.; Säule 0,5 µm DB Wax 60 m x 0,32 mm; Temperaturprogramm: 20 °C, 1 °/min. bis 28 °C; 2 °C /min. bis 60 °C; 20 °/min. bis 110 °C; Temperatur FID 200 °C.The determination of the gas phase components in the mainstream smoke of the filter cigarettes was carried out in the examples by means of GC-FID. For this purpose, a 20-channel smoking machine from Borgwaldt (RM 20 / CS) was equipped with 20 cigarettes and a 92 mm glass fiber filter for separating the moisture condensate. The test cigarettes were previously conditioned according to ISO 3402. 20 cigarettes were smoked according to ISO 3308, the wet condensate was deposited on the glass fiber filter and the gas phase was passed to the smoke machine pump. By means of a sampling valve, defined traits were taken from different cigarettes for the subsequent analysis and collected in a glass jar. Immediately after fumigation, 6 ml of the gas sample was transferred to the injector of a gas chromatograph (GC) with a sample loop, separated and detected by FID. As internal standard, a test gas of methane in nitrogen was used. GC-FID conditions were as follows: injector temperature 110 ° C; Split 80 ml / min .; Carrier gas helium, 1.7 ml / min .; Column 0.5 μm DB Wax 60 m × 0.32 mm; Temperature program: 20 ° C, 1 ° / min. up to 28 ° C; 2 ° C / min. up to 60 ° C; 20 ° / min. up to 110 ° C; Temperature FID 200 ° C.

Eine Quantifizierung wurde für die folgenden Gasphasenkomponenten'durchgeführt: Isopren, Acetaldehyd, Propionaldehyd, Furan, i-Butyraldehyd, Aceton, Acrolein, Methylfuran, Butanon, Methanol, Benzol, Butenon, Dimethylfuran, Diacetyl, Acetonitril, Cyanwasserstoff, und Toluol. Die Angabe der Ergebnisse erfolgt in µg der jeweiligen Gasphasenkomponente pro Cigarette. Die Messung wurde als Doppelbestimmung durchgeführt.Quantification was performed for the following gas phase components: isoprene, acetaldehyde, propionaldehyde, furan, i-butyraldehyde, acetone, acrolein, methylfuran, butanone, methanol, benzene, butenone, dimethylfuran, diacetyl, acetonitrile, hydrogen cyanide, and toluene. The indication of the results is in μg of the respective gas phase component per cigarette. The measurement was carried out as a double determination.

Als Gesamtgasphase Gges wird die Summe der Werte der oben aufgeführten Gasphasenkomponenten bezeichnet.The total gas phase G ges is the sum of the values of the gas phase components listed above.

NFDPM: Nicotine free dry particulate matter; wird üblicherweise auch als "Tar" oder Kondensatwert bezeichnet.NFDPM: Nicotine free dry particulate matter; is commonly referred to as "tar" or condensate value.

Vorzugsweise liegt das Verhältnis von CO zu NFDPM unter 1.Preferably, the ratio of CO to NFDPM is less than 1.

Die TSNA-Gehalte im Rauch werden auf die NFDPM-Gehalte bezogen und liegen vorzugsweise unter 15 ng/mg NFDPM, insbesondere unter 13 ng/mg NFDPM. Der NO-Gehalt liegt vorzugsweise unter 50 µg pro Cigarette.The TSNA levels in the smoke are related to the NFDPM levels and are preferably below 15 ng / mg NFDPM, especially below 13 ng / mg NFDPM. The NO content is preferably below 50 μg per cigarette.

Bei der erfindungsgemäßen Cigarette ist die Menge der Gasphasensubstanzen, vorzugsweise dargestellt als Gesamtgasphase Gges, signifikant reduziert.In the case of the cigarette according to the invention, the amount of the gas phase substances, preferably represented as total gas phase G tot , is significantly reduced.

Die Quotienten Q1 und Q2, die das Verhältnis von Benzol zu CO darstellen, sind unter die Grenzwerte von 1,5 für Q1 (gemessen nach ISO) bzw. 3 für Q2 (gemessen nach Intense) abgesenkt.Ratios Q1 and Q2, representing the ratio of benzene to CO, are below the limits of 1.5 for Q1 (measured by ISO) and 3 for Q2 (measured after Intense).

Die Absenkung von Gasphasenbestandteilen des Rauchs sowie die Quotienten Q1 bzw. Q2 der erfindungsgemäßen Cigarette sind dabei weitgehend unabhängig von der Lagerzeit wie auch von den Abrauchbedingungen.The reduction of gas phase constituents of the smoke and the quotients Q1 and Q2 of the cigarette according to the invention are largely independent of the storage time as well as of the smoking conditions.

In Biomarker-Studien konnte nachgewiesen werden, dass die Aufnahme von Gasphasenbestanteilen bei den erfindungsgemäßen Filtercigaretten im Vergleich zu konventionellen Produkten unter Alltagsbedingungen effektiv reduziert ist.In biomarker studies it could be demonstrated that the uptake of gas phase contents in the filter cigarettes according to the invention is effectively reduced in comparison with conventional products under everyday conditions.

Die Cytotoxizität der Gasphase, gemessen mit den Standardtests NRU und MTS, wird bei der erfindungsgemäßen Cigarette sowohl unter ISO-Abrauchbedingungen als auch unter Intense-Abrauchbedingungen signifikant abgesenkt im Vergleich zu herkömmlichen Cigaretten.The cytotoxicity of the gas phase, as measured by the standard tests NRU and MTS, is significantly lowered in the cigarette according to the invention both under ISO smoking conditions and under intense smoking conditions compared to conventional cigarettes.

Die TSNA-Werte im Rauch der erfindungsgemäßen Cigaretten sind im Vergleich zu herkömmlichen Filtercigaretten gering, das gilt sowohl bei ISO- als auch bei Intense-Abrauchbedingungen. Sie liegen vorzugsweise unter 50% der Werte der herkömmlichen Filtercigaretten.The TSNA values in the smoke of the cigarettes according to the invention are low in comparison with conventional filter cigarettes, this applies both to ISO and to intense smoking conditions. They are preferably below 50% of the values of conventional filter cigarettes.

Weiterhin wurde beobachtet, dass die sensorische Akzeptanz der erfindungsgemäßen Cigarette mindestens gleichwertig gegenüber einem handelsüblichen Markenprodukt ist.Furthermore, it has been observed that the sensory acceptance of the cigarette according to the invention is at least equivalent to a commercial brand product.

Im Folgenden wird die Erfindung anhand von Beispielen weiter beschrieben.In the following, the invention will be further described by way of examples.

Beispiel 1example 1

Für die Variante in Beispiel 1 wurde eine Virginia-Blend-Tabakmischung ohne Zusatzmittel hergestellt. Als Vergleich wurde eine handelsübliche Cigarettenmarke mit Virginia-Blend-Mischung untersucht.For the variant in Example 1, a Virginia Blend tobacco blend was prepared without additives. As a comparison, a commercial cigarettes brand was examined with Virginia blend blend.

Der Tabakstrang wurde mit einem Cigarettenpapier umhüllt, das eine Porosität von 50 CU besitzt und mit einem Glimmsalzgehalt von 1,3% Natrium/ Kaliumcitrat versehen wurde und dessen Flächengewicht bei 22 mg/m2 lag.The tobacco rod was wrapped with a cigarette paper having a porosity of 50 CU and provided with a bleaching salt content of 1.3% sodium / potassium citrate and whose basis weight was 22 mg / m 2 .

An den Strang schloss sich ein aus zwei Teilen bestehender Filter an, in dessen strangseitigen Filterteil, von 15 mm Länge, 75 mg Aktivkohle eingebracht waren. Der mundseitige Filterteil wurde aus Celluloseacetat gefertigt.The strand was followed by a two-part filter, in the strand-side filter part, 15 mm in length, 75 mg of activated carbon were introduced. The mouth-side filter part was made of cellulose acetate.

Der Filter war von einem Filterumhüllungspapier umgeben. Der Tabakstrang wurde mit dem Filter durch ein Umwickelpapier verbunden. Mit Hilfe einer online-Lasereinrichtung wurde eine Filterventilation von 25 % eingestellt.The filter was surrounded by a filter wrap paper. The tobacco rod was connected to the filter by a wrapping paper. With the help of an online laser device, a filter ventilation of 25% was set.

Die Tabelle 2 zeigt die sowohl für erfindungsgemäße als auch für die Vergleichscigaretten ermittelten Werte, die entweder nach ISO- oder nach Intense-Bedingungen (CINT) mit abgedeckter Ventilationszone abgeraucht wurden.Table 2 shows the values determined both for inventive and for the comparative cigarettes, which were fumigated either to ISO or intense conditions (CINT) with a covered ventilation zone.

Die Gesamtgasphase Gges liegt bei der erfindungsgemäßen Cigarette deutlich niedriger als beim Vergleich. Q1 liegt mit 1,4 unterhalb des gewünschten Grenzwertes 1,5 und Q2 mit 2,5 unterhalb des gewünschten Grenzwertes 3.The total gas phase G tot is significantly lower in the inventive cigarette than in the comparison. Q1 is 1.4 below the desired limit 1.5 and Q2 is 2.5 below the desired limit 3.

Ferner wurde das erfindungsgemäße Produkt in einer Feldstudie mit einem marktüblichen Produkt mit ähnlichen Nikotin-, Kondensat- und CO-Werten verglichen. Dabei rauchten fünfzig Raucher zunächst das Vergleichsprodukt (handelsübliche Cigarette mit vergleichbarer Tabakmischung), dann für sechs Wochen das erfindungsgemäße Produkt und zum Abschluss wieder für sechs Wochen das Vergleichsprodukt.Furthermore, the product according to the invention was compared in a field study with a commercially available product with similar nicotine, condensate and CO values. Fifty smokers first smoked the comparison product (commercial cigarette with comparable tobacco blend), then the product according to the invention for six weeks and finally the comparison product again for six weeks.

Die Probanden lebten unter Alltagsbedingungen, es gab keinerlei Einschränkungen bezüglich Konsum und Rauchverhalten. Alle drei Wochen wurden die Probanden auf die Gehalte verschiedener Biomarker (Stoffwechselprodukte von Rauchinhaltsstoffen) in Körperflüssigkeiten untersucht.The subjects lived under everyday conditions, there were no restrictions on consumption and smoking behavior. Every three weeks, the subjects were examined for the levels of various biomarkers (metabolites of smoke constituents) in body fluids.

Es zeigte sich, dass die Nikotinaufnahme für Vergleichs- und Testprodukt auf gleichem Niveau lag, also keine Veränderung des Rauchverhaltens eintrat. Demgegenüber konnte in der Phase, in der das erfindungsgemäße Produkt geraucht wurde, eine deutliche Reduzierung von Biomarkern für Gasphasenbestandteile des Rauchs nachgewiesen werden. Tabelle 2 Beispiel 1 erfindungsgemäße Cigarette erfindunggemäße Cigarette Vergleich Vergleich Abrauchnorm ISO CINT ISO CINT Filterventilation % 25 0 25 0 Aktivkohlemenge mg 75 75 0 0 Flächengewicht Cigarettenpapier g/m2 22 22 25 25 Porosität Cigarettenpapier CU 50 50 54 54 Glimmsalzgehalt im Cigarettenpapier % 1,3 1,3 0,7 0,7 Nikotin im Rauch mg/Cig 0,87 2,07 0,85 2,05 NFDPM mg/Cig 9,3 25,4 10,6 28,6 CO mg/Cig 8,4 23,6 10,9 29, 9 CO / NFDPM 0,90 0,93 1,03 1,05 Gesamt-Gasphase µg/Cig 910 4219 1998 5512 Benzol µg/Cig 12 60 41 99 Q = Benzol/CO 1,4 2,5 3,8 3,3 It turned out that the nicotine uptake for the control and test product was at the same level, ie no change in smoking behavior occurred. In contrast, in the phase in which the product according to the invention was smoked, a clear reduction of biomarkers for gas phase constituents of the smoke could be detected. <u> Table 2 </ u> example 1 Cigarette according to the invention inventive cigarette comparison comparison Abrauchnorm ISO CINT ISO CINT filter ventilation % 25 0 25 0 Quantity of activated carbon mg 75 75 0 0 Basis weight of cigarette paper g / m 2 22 22 25 25 Porosity cigarette paper CU 50 50 54 54 Glimmsalzgehalt in cigarette paper % 1.3 1.3 0.7 0.7 Nicotine in the smoke mg / cig 0.87 2.07 0.85 2.05 NFDPM mg / cig 9.3 25.4 10.6 28.6 CO mg / cig 8.4 23.6 10.9 29, 9 CO / NFDPM 0.90 0.93 1.03 1.05 Total gas phase ug / cig 910 4219 1998 5512 benzene ug / cig 12 60 41 99 Q = benzene / CO 1.4 2.5 3.8 3.3

Beispiel 2Example 2

Für die Version in Beispiel 2 wurde eine American-Blend-Tabakmischung ebenfalls gänzlich ohne Zusatzmittel hergestellt. Als Vergleich wurde eine handelsübliche Cigarettenmarke mit American-Blend-Mischung untersucht.For the version in Example 2, an American Blend tobacco blend was also made entirely without any additive. As a comparison, a commercial cigarette brand with American Blend mixture was examined.

Die einzelnen Ergebnisse beider Cigaretten sind in Tabelle 3 zusammengestellt. Tabelle 3 Beispiel 2 erfindungsgemäße Cigarette erfindungsgemäße Cigarette Vergleich Vergleich Abrauchnorm ISO CINT ISO CINT Filterventilation % 18 0 46 0 Aktivkohlemenge mg 75 75 0 0 Flächengewicht Cigarettenpapier g/m2 35 35 25 25 Porosität Cigarettenpapier CU 320 320 33 33 Glimmsalzgehalt im Cigarettenpapier % 2,0 2,0 0,7 0,7 Nikotin im Rauch mg/Cig 0,62 1,68 0,54 1,58 NFDPM mg/Cig 6,3 19,3 6,2 21,7 CO mg/Cig 5, 6 16,9 6,9 24,3 CO / NFDPM 0,89 0,88 1,11 1,12 Gesamt-Gasphase µg/Cig 307 2312 1305 5438 Benzol µg/Cig 2,8 24,4 27,7 92,7 Q (Benzol/CO) 0,5 1,4 4,0 3,8 The individual results of both cigarettes are summarized in Table 3. <u> Table 3 </ u> Example 2 Cigarette according to the invention Cigarette according to the invention comparison comparison Abrauchnorm ISO CINT ISO CINT filter ventilation % 18 0 46 0 Quantity of activated carbon mg 75 75 0 0 Basis weight of cigarette paper g / m2 35 35 25 25 Porosity cigarette paper CU 320 320 33 33 Glimmsalzgehalt in cigarette paper % 2.0 2.0 0.7 0.7 Nicotine in the smoke mg / cig 0.62 1.68 0.54 1.58 NFDPM mg / cig 6.3 19.3 6.2 21.7 CO mg / cig 5, 6 16.9 6.9 24.3 CO / NFDPM 0.89 0.88 1.11 1.12 Total gas phase ug / cig 307 2312 1305 5438 benzene ug / cig 2.8 24.4 27.7 92.7 Q (benzene / CO) 0.5 1.4 4.0 3.8

Der Filter bestand aus einem Filterabschnitt aus reinem Celluloseacetat und einem strangseitigem 15 mm langen Abschnitt aus Celluloseacetat, in das pro mm 5 mg Aktivkohle eingebracht wurden, so dass der Filter insgesamt 75 mg Aktivkohle enthielt.The filter consisted of a pure cellulose acetate filter section and a 15 mm long strand section of cellulose acetate, into which 5 mg activated charcoal were introduced per mm, so that the filter contained a total of 75 mg activated charcoal.

Das Cigarettenpapier der erfindungsgemäßen Cigarette besaß eine Porosität von 320 CU und eine Flächengewicht von 35 g/m2.The cigarette paper of the cigarette according to the invention had a porosity of 320 CU and a basis weight of 35 g / m 2 .

Der Glimmsalzgehalt betrug für diese Version 2,0 % Natrium/ Kaliumcitrat.The mulled salt content for this version was 2.0% sodium / potassium citrate.

Der Filter war von einem Filterumhüllungspapier umgeben. Der Tabakstrang wurde mit dem Filter durch ein Umwickelpapier verbunden.The filter was surrounded by a filter wrap paper. The tobacco rod was connected to the filter by a wrapping paper.

An einer online-Lasereinrichtung wurde eine Filterventilation von 18 % eingestellt.On an online laser device, a filter ventilation of 18% was set.

Diese Auswahl der Designparameter ergab für beide Versionen die gewünschte Reduktion der Gasphasewerte sowohl unter ISO-.wie auch unter Intense-Abrauchbedingungen (CINT).This selection of design parameters yielded the desired reduction in gas phase values for both versions under both ISO and under intense smoking conditions (CINT).

Ebenso konnten dadurch die Quotienten Q1 und Q2 deutlich reduziert werden.Likewise, the quotients Q1 and Q2 could be significantly reduced.

Beispiel 3Example 3

Cigaretten nach Beispiel 1 wurden über einen Zeitraum von 12 Monaten gelagert. Jeweils nach 3 Monaten wurden die Gasphasenwerte unter ISO Abrauchbedingungen neu ermittelt. Es wurde beobachtet, dass die Effektivität der Cigarettenfilter, in Bezug auf die Werte der Gesamtgasphase Gges, weitestgehend stabil blieb. Die Menge der Gesamtgasphase nach 3 Monaten betrug nur 3,6% mehr als die Menge der Gesamtgasphase ermittelt an frisch hergestellten Filtercigaretten. Nach 6 Monaten wurde ein weiterer Anstieg um nur 4,1% ermittelt. Die Abnahme der Effektivität um weniger als 10% innerhalb von 6 Monaten ist äußerst vorteilhaft. Tabelle 4 Beispiel 3 0 3 Monate 6 Monate Gesamt-Gasphase µg/Cig 910 943 982 Cigarettes according to Example 1 were stored for a period of 12 months. After 3 months, the gas phase values were re-determined under ISO smoking conditions. It was observed that the effectiveness of the cigarette filters remained largely stable with respect to the total gas phase G tot . The amount of the total gas phase after 3 months was only 3.6% more than the amount of the total gas phase determined on freshly prepared filter cigarettes. After 6 months another became Increase of only 4.1%. The decrease in effectiveness by less than 10% within 6 months is extremely beneficial. <u> Table 4 </ u> Example 3 0 3 months 6 months Total gas phase ug / cig 910 943 982

Beispiel 4Example 4

Die Cigaretten nach Beispiel 4 entsprechen den Cigaretten nach Beispiel 1. Der Tabak des Tabakstrangs wurde so ausgesucht, dass der TSNA-Gehalt unterhalb von 1 µg/g Tabak, nämlich bei 0,4 µg/g Tabak lag. Tabelle 5 Beispiel 4 Erfindungsgemäße Cigarette Vergleich Abrauchnorm ISO ISO Tabak Chlorid % 0,4 0,9 Tabak Nitrat % 0,2 0,5 Tabak TSNA µg/g 0,4 1,1 Tabaksorte Virginia Virginia Rauch NO µl/Cig. 42,00 71,00 Rauch TSNA ng/Cig. 65,0 142,0 Rauch TSNA ng/mg NFDPM 7,0 15,4 The cigarettes according to Example 4 correspond to the cigarettes according to Example 1. The tobacco of the tobacco strand was selected so that the TSNA content was below 1 μg / g tobacco, namely 0.4 μg / g tobacco. <u> Table 5 </ u> Example 4 Cigarette according to the invention comparison Abrauchnorm ISO ISO Tobacco chloride % 0.4 0.9 Tobacco nitrate % 0.2 0.5 Tobacco TSNA ug / g 0.4 1.1 variety of tobacco Virginia Virginia Smoke NO ul / Cig. 42,00 71.00 Smoke TSNA ng / cig. 65.0 142.0 Smoke TSNA ng / mg NFDPM 7.0 15.4

Der Rauch der Cigaretten nach Beispiel 1 wurde bezüglich seiner TSNA-Werte und NO-Werte untersucht. In der Tabelle 5 sind diese Werte im Vergleich zu einer konventionellen Cigarette gegenübergestellt. Der TSNA-Gehalt im Rauch ist im Vergleich zur herkömmlichen Cigarette um 54% geringer.The smoke of the cigarettes according to example 1 was examined with regard to its TSNA values and NO values. In Table 5 are compared these values compared to a conventional cigarette. The TSNA content in the smoke is 54% lower compared to the conventional cigarette.

Beispiel 5Example 5

Die Versuchscigaretten nach Beispiel 1 und 2 wurden sowohl unter ISO-, als auch Intense-Abrauchbedingungen abgeraucht und die Cytotoxizität der Gasphase gemäß NRU und MTS-Tests ermittelt.The test cigarettes of Examples 1 and 2 were smoked under both ISO and intense smoking conditions and the cytotoxicity of the gas phase was determined according to NRU and MTS tests.

Es wurden EC50-Werte der Gasphasen ermittelt. Die Werte der Toxizität werden angegeben in Prozent Abnahme der Toxizität bezogen auf eine handelsübliche Vergleichscigarette mit vergleichbaren NFDPM-Werten und vergleichbaren Tabakmischungen. Aus der Tabelle ist ersichtlich, dass bei allen untersuchten Proben die Cytotoxizität der Versuchscigaretten deutlich niedriger liegt als bei den dazugehörigen Vergleichscigaretten. Die Cigaretten wurden nach ISO-Bedingungen abgeraucht und die Gasphase untersucht. Die Cigaretten wurden außerdem nach Intense-Bedingungen abgeraucht und die Gasphase untersucht. Unter beiden Abrauchbedingungen war die Cytotoxizität bei den erfindungsgemäßen Cigaretten deutlich niedriger als bei dem Vergleich. Tabelle 6 Beispiel 1 Beispiel 2 Toxizität ISO CINT ISO CINT Abnahme Membrantoxizität (NRU) in % 45,0 47,0 95,0 72,0 Abnahme Metabolische Toxizität (MTS) in % 76,8 52,2 85,0 77,0 EC50 values of the gas phases were determined. The values of toxicity are given in percent decrease in toxicity relative to a commercially available comparison cigarette with comparable NFDPM values and comparable tobacco mixtures. It can be seen from the table that the cytotoxicity of the test cigarettes is significantly lower for all samples tested than for the corresponding comparison cigarettes. The cigarettes were smoked according to ISO conditions and the gas phase was examined. The cigarettes were also smoked in intense conditions and the gas phase examined. Under both smoking conditions, the cytotoxicity was significantly lower in the cigarettes according to the invention than in the comparison. <u> Table 6 </ u> example 1 Example 2 toxicity ISO CINT ISO CINT Decrease in membrane toxicity (NRU) in% 45.0 47.0 95.0 72.0 Decrease in metabolic toxicity (MTS) in% 76.8 52.2 85.0 77.0

Beispiel 6Example 6

Für die Version in Beispiel 6 wurde eine American-Blend-Tabakmischung ebenfalls gänzlich ohne Zusatzmittel hergestellt. Als Vergleich wurde eine handelsübliche Ultra-Cigarettenmarke untersucht.For the version in Example 6, an American Blend tobacco blend was also made entirely without any additive. As a comparison, a commercial ultra-cigarette brand was examined.

Die einzelnen Ergebnisse beider Cigaretten sind in Tabelle 7 zusammengestellt.The individual results of both cigarettes are summarized in Table 7.

Der Filter bestand aus einem Filterabschnitt aus reinem Celluloseacetat und einem strangseitigem 15 mm langen Abschnitt aus Celluloseacetat, in das pro mm 5 mg Aktivkohle eingebracht wurden, so dass der Filter insgesamt 75 mg Aktivkohle enthielt.The filter consisted of a pure cellulose acetate filter section and a 15 mm long strand section of cellulose acetate, into which 5 mg activated charcoal were introduced per mm so that the filter contained a total of 75 mg activated charcoal.

Das Cigarettenpapier der erfindungsgemäßen Cigarette besaß eine Porosität von 50 CU und ein Flächengewicht von 22 g/m2.The cigarette paper of the cigarette according to the invention had a porosity of 50 CU and a basis weight of 22 g / m 2 .

Der Glimmsalzgehalt betrug für diese Version 1,3 % Natrium-/ Kaliumcitrat.The mulled salt content for this version was 1.3% sodium / potassium citrate.

Der Filter war von einem Filterumhüllungspapier umgeben. Der Tabakstrang wurde mit dem Filter durch ein Umwickelpapier verbunden.The filter was surrounded by a filter wrap paper. The tobacco rod was connected to the filter by a wrapping paper.

An einer online-Lasereinrichtung wurde eine Filterventilation von 60 % eingestellt.On an online laser device, a filter ventilation of 60% was set.

Diese Auswahl der Designparameter ergab die gewünschte Reduktion der Gasphasewerte sowohl unter ISO- wie auch unter Intense-Abrauchbedingungen (CINT).This selection of design parameters yielded the desired reduction in gas phase values under both ISO and intense smoke conditions (CINT).

Ebenso konnten dadurch die Quotienten Q1 und Q2 deutlich reduziert werden. Tabelle 7 Beispiel 6 erfindungsgemäße Cigarette erfindungsgemäße Cigarette Vergleich Vergleich Abrauchnorm ISO CINT ISO CINT Filterventilation % 60 0 69 0 Aktivkohlemenge mg 75 75 0 0 Flächengewicht Cigarettenpapier g/m2 22 22 25 25 Porosität Cigarettenpapier CU 50 50 49 49 Glimmsalzgehalt im Cigarettenpapier % 1,3 1,3 1,0 1,0 Nikotin im Rauch mg/Cig 0,44 2,37 0,28 1, 68 NFDPM mg/Cig 3,6 24,0 2,6 21,2 CO mg/Cig 2,3 20,0 2,8 23,9 CO / NFDPM 0, 64 0,83 1,08 1,13 Gesamt-Gasphase µg/Cig 88 2873 680 5381 Benzol µg/Cig 1,3 36,9 15,4 93,2 Q = Benzol/CO 0,56 1,8 5,5 3,9 Likewise, the quotients Q1 and Q2 could be significantly reduced. <u> Table 7 </ u> Example 6 Cigarette according to the invention Cigarette according to the invention comparison comparison Abrauchnorm ISO CINT ISO CINT filter ventilation % 60 0 69 0 Quantity of activated carbon mg 75 75 0 0 Basis weight of cigarette paper g / m 2 22 22 25 25 Porosity cigarette paper CU 50 50 49 49 Glimmsalzgehalt in cigarette paper % 1.3 1.3 1.0 1.0 Nicotine in the smoke mg / cig 0.44 2.37 0.28 1, 68 NFDPM mg / cig 3.6 24.0 2.6 21.2 CO mg / cig 2.3 20.0 2.8 23.9 CO / NFDPM 0, 64 0.83 1.08 1.13 Total gas phase ug / cig 88 2873 680 5381 benzene ug / cig 1.3 36.9 15.4 93.2 Q = benzene / CO 0.56 1.8 5.5 3.9

Claims (27)

  1. Filter cigarette having a tobacco strand, a wrapping and a filter, wherein
    a) the filter comprises at least one gas phase-active filter part which contains at least one gas phase-reducing substance,
    b) the gas phase-reducing substances are embedded in a filter material matrix,
    c) the gas phase-reducing substances are introduced in a quantity of at least 75 mg per filter and at least 5 mg/mm of the length of the gas phase-active filter part,
    d) the filter cigarette exhibits a filter ventilation of at most 30%,
    e) the NFDPM value is between 4 and 10 mg/cigarette, as measured in accordance with ISO smoking conditions,
    f) the gas phase quotient Q1, defined as (µg of benzene per cigarette) / (mg of CO per cigarette) and measured in accordance with ISO smoking conditions, is less than 1.5, preferably less than 1.
  2. Filter cigarette according to claim 1, characterized in that the gas phase quotient Q2, defined as (µg of benzene per cigarette)/(mg of CO per cigarette) and measured in accordance with intense smoking conditions, is less than 3, preferably less than 2.5, particularly preferably less than 2.
  3. Filter cigarette according to claim 1 or 2, characterized in that the filter is adapted to keep an increase in the quotients Q1 and/or Q2 to less than 20%, preferably less than 10%, over a cigarette storage period of 6 months.
  4. Filter cigarette according to anyone of claims 1 to 3, characterized in that the tobacco of the tobacco strand contains an additive content of less than 1% based on the tobacco dry matter.
  5. Filter cigarette according to claim 4, characterized in that the tobacco of the tobacco strand does not contain any additives.
  6. Filter cigarette according to anyone of claims 1 to 5, characterized in that the tobacco strand comprises a tobacco mixture which contains Virginia tobacco and/or Oriental tobacco.
  7. Filter cigarette according to anyone of claims 1 to 6, characterized in that the TSNA content of the tobacco is less than 2 µg/g of tobacco, preferably less than 1 µg/g of tobacco.
  8. Filter cigarette according to anyone of claims 1 to 7, characterized in that the nitrate content of the tobacco is less than 0.4% based on the tobacco dry matter.
  9. Filter cigarette according to anyone of claims 1 to 8, characterized in that the NO content in the smoke is less than 50 µg per cigarette, as measured in accordance with ISO smoking conditions.
  10. Filter cigarette according to anyone of claims 1 to 9, characterized in that the TSNA content in the smoke based on NFDPM is less than 15 ng/mg of NFDPM, preferably less than 13 ng/mg of NFDPM, as measured in accordance with ISO smoking conditions.
  11. Filter cigarette according to anyone of claims 1 to 10, characterized in that the gas phase-reducing substances comprise a surface area of more than 500 m2/g, preferably more than 1000 m2/g, particularly preferably more than 1200 m2/g.
  12. Filter cigarette according to anyone of claims 1 to 11, characterized in that the gas phase-reducing substances comprise at least one of the substances contained in the following group: activated carbons, aluminium oxides, aluminium hydroxides, ion exchangers, ion exchange resins, molecular sieves, silica gels, natural minerals, synthetic minerals, magnesium silicates, argillaceous earths, zeolites, bentonites, kieselgur, sepiolite.
  13. Filter cigarette according to anyone of claims 1 to 12, characterized in that the gas phase-reducing substances are introduced in a quantity of at least 82.5 mg per filter and at least 5.5 mg/mm of the length of the gas phase-active filter part, preferably in a quantity of at least 100 mg per filter, particularly preferably in a quantity of at least 200 mg per filter.
  14. Filter cigarette according to anyone of claims 1 to 13, characterized in that the total gas phase Gtot is less than 1000 µg/cigarette as measured under ISO smoking conditions and/or less than 5000 µg/cigarette as measured under CINT smoking conditions.
  15. Filter cigarette according to anyone of claims 1 to 14, characterized in that the filter material matrix comprises at least one of the materials selected from the following group: cellulose, cellulose derivatives, cellulose acetate, polymers, polyolefins, polypropylene, polyethylene, polyesters.
  16. Filter cigarette according to anyone of claims 1 to 15, characterized in that the filter material and/or the filter material matrix is present in at least one of the forms selected from the following group: fibres, tows, papers, textile webs, non-woven materials, fibrous webs, extrudates, foams.
  17. Filter cigarette according to anyone of claims 1 to 16, characterized in that the filter material is provided with additives, preferably with taste-influencing additives and/or catalysts.
  18. Filter cigarette according to anyone of claims 1 to 17, characterized in that the filter cigarette exhibits a filter ventilation of at most 25%, preferably of at most 15%, particularly preferably of at most 10%.
  19. Filter cigarette according to anyone of claims 1 to 17, characterized in that the filter cigarette does not exhibit any filter ventilation.
  20. Filter cigarette according to anyone of claims 1 to 19, characterized in that the filter consists of more than one part.
  21. Filter cigarette according to anyone of claims 1 to 20, characterized in that the cigarette paper porosity is at least 40 CU, preferably at least 60 CU.
  22. Filter cigarette according to anyone of claims 1 to 20, characterized in that the cigarette paper porosity is at least 300 CU.
  23. Filter cigarette according to anyone of claims 1 to 22, characterized in that the glow salt content in the cigarette paper is at least 1%, preferably at least 2%, based on the weight of the cigarette paper.
  24. Filter cigarette according to anyone of claims 1 to 23, characterized in that the grammage of the cigarette paper is less than 25 g/m2, and preferably is 22 g/m2.
  25. Filter cigarette according to anyone of claims 1 to 24, characterized in that the NFDPM value is between 4 and 7 mg per cigarette as measured in accordance with ISO smoking conditions.
  26. Filter cigarette according to anyone of claims 1 to 24, characterized in that the NFDPM value is between 4 and 6 mg per cigarette as measured in accordance with ISO smoking conditions.
  27. Filter cigarette according to anyone of claims 1 to 26, characterized in that the NFDPM value is between 10 and 32 mg per cigarette, preferably between 10 and 25 mg per cigarette, as measured in accordance with CINT smoking conditions.
EP06700443A 2005-02-01 2006-01-16 Filter cigarette Revoked EP1843670B1 (en)

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SI200631466T SI1843670T1 (en) 2005-02-01 2006-01-16 Filter cigarette

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CA2596475A1 (en) 2006-08-10
US8439046B2 (en) 2013-05-14
KR20070096027A (en) 2007-10-01
TW200638886A (en) 2006-11-16
PL1843670T3 (en) 2013-01-31
TWI336247B (en) 2011-01-21
CA2596475C (en) 2013-03-05
DE102005005175A1 (en) 2006-08-10
MX2007009298A (en) 2008-01-11
PT1843670E (en) 2012-11-27
EP1843670A1 (en) 2007-10-17
CN101150964A (en) 2008-03-26
NZ556708A (en) 2010-02-26
RU2007132877A (en) 2009-03-10
US20090020132A1 (en) 2009-01-22
DK1843670T3 (en) 2012-12-10
HK1107746A1 (en) 2008-04-18
UA88351C2 (en) 2009-10-12
AU2006209977A1 (en) 2006-08-10
RU2378959C2 (en) 2010-01-20
KR101319697B1 (en) 2013-10-17
BRPI0606759A2 (en) 2009-07-14
WO2006081931A1 (en) 2006-08-10
SI1843670T1 (en) 2012-12-31
JP2008528011A (en) 2008-07-31
CN101150964B (en) 2011-06-08
JP5161585B2 (en) 2013-03-13
AU2006209977B2 (en) 2011-04-07
ES2391831T3 (en) 2012-11-30

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