EP1028637A1 - Cigarette with reduced gas phase - Google Patents

Cigarette with reduced gas phase

Info

Publication number
EP1028637A1
EP1028637A1 EP97951904A EP97951904A EP1028637A1 EP 1028637 A1 EP1028637 A1 EP 1028637A1 EP 97951904 A EP97951904 A EP 97951904A EP 97951904 A EP97951904 A EP 97951904A EP 1028637 A1 EP1028637 A1 EP 1028637A1
Authority
EP
European Patent Office
Prior art keywords
filter
cigarette
paper
strand
tissue paper
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.)
Granted
Application number
EP97951904A
Other languages
German (de)
French (fr)
Other versions
EP1028637B1 (en
Inventor
Edgar Mentzel
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
Original Assignee
HF and PhF Reemtsma GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8166799&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1028637(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by HF and PhF Reemtsma GmbH and Co filed Critical HF and PhF Reemtsma GmbH and Co
Priority to PT97951904T priority Critical patent/PT1028637E/en
Priority to SI9730409T priority patent/SI1028637T1/en
Publication of EP1028637A1 publication Critical patent/EP1028637A1/en
Application granted granted Critical
Publication of EP1028637B1 publication Critical patent/EP1028637B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • 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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
    • 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
    • A24D3/163—Carbon

Definitions

  • the invention relates to a cigarette according to the preamble of claim 1.
  • the object of the invention is to develop a cigarette with a gas phase active filter which can be produced very efficiently and at the same time inexpensively.
  • the invention thus relates to a filter cigarette with a filter containing activated carbon with: a) a tobacco rod surrounded by a cigarette paper; b) a double filter, in which the strand-side part consists of a carbon-containing tissue paper, and with c) a circumferential filter ventilation zone in the mouth-side part made of cellulose acetate; d) the tissue paper of the strand-side filter part is a very voluminous paper which contains 20 to 50% by weight of microfine ground activated carbon; e) the ratio of the condensate retention performances of the strand-side to the mouth-side filter part is between 1 and 2; f) the air permeability of the cigarette paper is 40 to 100 Coresta units; and g) the degree of filter ventilation is 5 to 60%.
  • the cigarette paper porosity is 30 to 60% rel. higher than the cigarette paper porosity of a comparable cigarette produced with a conventional filter and the degree of filter ventilation is 10 to 60% rel. lower than the degree of filter ventilation of a comparable cigarette made with a conventional filter.
  • the tissue paper has a basis weight of approx. 40 - 60 g / m 2 , an activated carbon content of 15 - 50% and a thickness of 150 200 ⁇ m.
  • a preferred variant has a weight per unit area of 50 g / m 2 and an activated carbon content of 30% by weight with a thickness of 180 ⁇ m.
  • the strand-side filter part of the double filter is a core filter according to DE 42 05 658 C2, in which the core is made of carbon-containing tissue paper as in the first-mentioned embodiment, which is surrounded by a jacket made of material which is almost impermeable to the mainstream smoke .
  • This almost smoke-impermeable material consists, for example, of highly compressed cellulose acetate fibers.
  • the cigarettes C and D differed in the same way in the reactivity, whereby the tobacco flavor of variant D was more pronounced.
  • the F variant was significantly less reactive, but had an increased tobacco aroma.
  • the mouth-side filter part in addition to the known acetate monofilter: for example, a coaxial construction of the mouth-side filter part is known to offer the possibility of simultaneously providing the desired retention and the desired open one Optimally adjust the drag of the cigarette independently.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Colloid Chemistry (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Vending Machines For Individual Products (AREA)
  • Glass Compositions (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention relates to a cigarette with a filter containing activated carbon. Said cigarette comprises a tobacco string wrapped in cigarette paper, a double filter having a string-side part consisting of a tissue paper containing carbon, and a peripherally extending filter ventilation zone and located in the mouth-side part made of cellulose acetate. The tissue paper of the string-side filter part is a very bulky paper which contains 20 to 50 % wt microfine powdered active carbon. The ratio of condensate retention capacities of the string-side filter part to the mouth-side filter part ranges from 1 to 2. The air permeability of the cigarette paper is comprised between 40 and 100 Coresta units and the filter ventilation grade is comprised between 5 and 60 %.

Description

GASPHASENREDÜZIERTE CIGARETTE GAS PHASE REDUCED CIGARETTE
Die Erfindung betrifft eine Cigarette gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a cigarette according to the preamble of claim 1.
Es ist bekannt, daß durch Einbringen oberflächenreicher ateria- lien in einen Filter wie z. B. Aktivkohle ein Teil der gasförmigen Rauchbestandteile aus dem Rauch retiniert werden kann. Eine derartige selektive Retention führt zu nicht gewünschten geschmacklichen Veränderungen und damit zur Ablehnung solcher Produkte beim Raucher. Versuche, diese negative Begleiterschei- nung zu kompensieren, sind sehr aufwendig, siehe auch DE 41 05 500, kompliziert und kostenintensiv.It is known that by introducing surface-rich arteries into a filter such as. B. activated carbon, some of the gaseous smoke components can be retained from the smoke. Such a selective retention leads to undesired changes in taste and thus to the rejection of such products by the smoker. Attempts to compensate for this negative side effect are very complex, see also DE 41 05 500, complicated and cost-intensive.
Herkömmliche gasphasenaktive Filter sind in der Mehrzahl Kammerfilter, die in drei Segmente unterteilt sind und in der mittleren Kammer ein oberflächenaktives Material wie z. B. Aktivkohle, Meerschaum, Silicagel usw. enthalten. Diese Systeme sind von der Darstellung her sehr teuer und haben einen gravierenden Nachteil, daß die Kammerstabilität im Hinblick auf das Zusammendrücken während des Rauchens unbefriedigend ist. Andere Lösungsmöglichkeiten sind Doppelfilterkonstruktionen, bei denen die Aktivkohle in geringen Mengen in das tabakstockseitige Filterelement eingestreut werden. Diese Konstruktionen haben nur eine begrenzte und für viele Anwendungsmöglichkeiten nicht ausreichende Gasphasenreduzierung. Allen bekannten Konstruktionen gemein ist die negative geschmackliche Veränderung, die der Raucher als Kohlegeschmack artikuliert.Conventional gas phase active filters are in the majority chamber filters, which are divided into three segments and in the middle chamber a surface-active material such as. B. activated carbon, meerschaum, silica gel, etc. contain. These systems are very expensive to present and have a serious disadvantage that the chamber stability in terms of compression during smoking is unsatisfactory. Other possible solutions are double filter constructions in which the activated carbon is sprinkled in small quantities into the filter element on the tobacco rod side. These designs have only a limited gas phase reduction, which is not sufficient for many applications. Common to all known constructions is the negative change in taste, which the smoker articulates as a coal taste.
Eine deutliche, aber noch nicht zufriedenstellende Verbesserung zeigte sich bei der Verwendung eines kohlehaltigen Tissuepapie- res, das mit mikrofein gemahlener Kohle (Korngröße < 15 μm) versetzt war. Aufgabe der Erfindung ist es, eine Cigarette mit einem gasphasen- aktiven Filter zu entwickeln, der sehr effizient und gleichzeitig kostengünstig herstellbar ist.A clear, but not yet satisfactory improvement was shown when using a carbon-containing tissue paper that was mixed with microfine ground carbon (grain size <15 μm). The object of the invention is to develop a cigarette with a gas phase active filter which can be produced very efficiently and at the same time inexpensively.
Zur Lösung dieser Aufgabe dienen die Merkmale des Patentanspruchs 1.The features of claim 1 serve to solve this problem.
Die Erfindung betrifft also eine Filtercigarette mit einem Aktivkohle enthaltenden Filter mit: a) einem durch ein Cigarettenpapier umgebenen Tabakstrang; b) einem Doppelfilter, bei dem der strangseitige Teil aus einem kohlehaltigen Tissuepapier besteht, und mit c) einer in Umfangsrichtung verlaufenden Filter-Ventilationszone im mundseitigen Teil aus Celluloseacetat; d) das Tissuepapier des strangseitigen Filterteils ist ein sehr voluminöses Papier, das 20 bis 50 Gew.-% mikrofein gemahlene Aktivkohle enthält; e) das Verhältnis der Kondensat-Retentionsleistungen von strangseitigem zu mundseitigem Filterteil beträgt zwischen 1 und 2; f ) die Luftdurchlässigkeit des Cigarettenpapiers beträgt 40 bis 100 Coresta-Einheiten; und g) der Filterventilationsgrad beträgt 5 bis 60 %.The invention thus relates to a filter cigarette with a filter containing activated carbon with: a) a tobacco rod surrounded by a cigarette paper; b) a double filter, in which the strand-side part consists of a carbon-containing tissue paper, and with c) a circumferential filter ventilation zone in the mouth-side part made of cellulose acetate; d) the tissue paper of the strand-side filter part is a very voluminous paper which contains 20 to 50% by weight of microfine ground activated carbon; e) the ratio of the condensate retention performances of the strand-side to the mouth-side filter part is between 1 and 2; f) the air permeability of the cigarette paper is 40 to 100 Coresta units; and g) the degree of filter ventilation is 5 to 60%.
Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstände der Unteransprüche .Advantageous embodiments of the invention are the subject of the dependent claims.
Bei der erfindungsgemäßen Filtercigarette liegt die Cigaretten- papier-Porosität 30 bis 60 % rel. höher als die Cigarettenpapier- Porosität einer mit konventionellem Filter hergestellten vergleichbaren Cigarette und der Filterventilationsgrad ist 10 bis 60 % rel. niedriger als der Filterventilationsgrad einer mit konventionellem Filter hergestellten vergleichbaren Cigarette.In the filter cigarette according to the invention, the cigarette paper porosity is 30 to 60% rel. higher than the cigarette paper porosity of a comparable cigarette produced with a conventional filter and the degree of filter ventilation is 10 to 60% rel. lower than the degree of filter ventilation of a comparable cigarette made with a conventional filter.
Das Tissuepapier hat ein Flächengewicht von ca. 40 - 60 g/m2 , einen Aktivkohlegehalt von 15 - 50 % und eine Dicke von 150 200 μm. Eine bevorzugte Variante hat ein Flächengewicht von 50 g/m2 und einen Aktivkohlegehalt von 30 Gew.-% bei einer Dicke von 180 μm.The tissue paper has a basis weight of approx. 40 - 60 g / m 2 , an activated carbon content of 15 - 50% and a thickness of 150 200 μm. A preferred variant has a weight per unit area of 50 g / m 2 and an activated carbon content of 30% by weight with a thickness of 180 μm.
In einer besonderen Ausfuhrungsform ist der strangseitige Filterteil des Doppelfilters ein Core-Filter gemäß DE 42 05 658 C2, bei dem der Kern aus kohlehaltigem Tissuepapier wie bei der zuerst genannten Ausfuhrungsform gebildet ist, der von einem Mantel aus für den Hauptstromrauch nahezu undurchlässigem Material umgeben ist. Dieses nahezu rauchundurchlässige Material besteht beispielsweise aus stark verdichteten Celluloseacetat- fasern.In a special embodiment, the strand-side filter part of the double filter is a core filter according to DE 42 05 658 C2, in which the core is made of carbon-containing tissue paper as in the first-mentioned embodiment, which is surrounded by a jacket made of material which is almost impermeable to the mainstream smoke . This almost smoke-impermeable material consists, for example, of highly compressed cellulose acetate fibers.
Überraschenderweise hat sich gezeigt, daß bei Einsatz des gasphasenaktiven Materials nicht allein die Gasphasenretention, sondern die spezifischen Retentionsverhältnisse der einzelnen Filtersegmente in Kombination mit den Ventilationsverhältnissen der Cigarette von entscheidendem Einfluß sind. Als besonders günstig haben sich die in der Tabelle 1 dargestellten Kombinationen B, D und F der Retentions- und Ventilationsverhältnisse herausgestellt. Die Kombinationen A, C und E sind bekannte Cigaretten, die durch die Kombinationen B, D und F erfindungs- gemäß angewandelt wurden.Surprisingly, it has been shown that when using the gas phase-active material, not only the gas phase retention, but also the specific retention ratios of the individual filter segments in combination with the ventilation ratios of the cigarette are of decisive influence. The combinations B, D and F of the retention and ventilation ratios shown in Table 1 have proven to be particularly favorable. Combinations A, C and E are known cigarettes which were combined according to the invention by combinations B, D and F.
Die sensorischen Vergleiche wurden von einem Expertenpanel durchgeführt und ergaben folgende Resultate: Die Cigaretten A und B unterschieden sich nur in dem Punkt Reaktivität, wobei die Variante B signifikant weniger reaktiv, d. h. für den Konsumenten übersetzt weniger rauh und weniger scharf war.The sensory comparisons were carried out by an expert panel and gave the following results: The cigarettes A and B differed only in the point of reactivity, whereby variant B was significantly less reactive, i. H. translated less rough and less sharp for the consumer.
Die Cigaretten C und D unterschieden sich in gleicher Weise in der Reaktivität, wobei das Tabakaroma der Variante D stärker ausgeprägt war. Zum gleichen Ergebnis kamen die Experten auch bei dem Cigaretten- vergleich von E und F. Die F-Variante war deutlich geringer reaktiv, hatte aber ein erhöhtes Tabakaroma.The cigarettes C and D differed in the same way in the reactivity, whereby the tobacco flavor of variant D was more pronounced. The experts came to the same conclusion when comparing the E and F cigarettes. The F variant was significantly less reactive, but had an increased tobacco aroma.
Auffällig ist, daß der Retentionsquotient der Einzelfiltersegmente mit abnehmendem Kondensat- und Nikotinwert größer wird. Gleichzeitig ist es notwendig, zur Erzielung der mindestens gleichen Tabakaromaqualität die Cigarettenpapierporosität der jeweiligen Vergleichscigarette zu erhöhen bei gleichzeitiger Reduzierung der Filterventilation. Eine Ursache für die relative Besserstellung der Aromaqualität könnten hier die Partikelgrößenverteilung des Hauptstromrauches sein, die maßgeblich durch unterschiedliche Strömungsgeschwindigkeiten und damit unterschiedlichen Verglimmungstemperaturen des Tabaks beeinflußt werden. Versuche haben gezeigt, wenn man die Versuchs- und Vergleichscigaretten strömungsmäßig aneinander anpaßt, daß der sog. Kohlegeschmack und ein Abfall in der Aromaqualität eintritt.It is striking that the retention quotient of the individual filter segments increases with decreasing condensate and nicotine values. At the same time, it is necessary to increase the cigarette paper porosity of the respective comparison cigarette in order to achieve at least the same tobacco aroma quality, while at the same time reducing the filter ventilation. One reason for the relative improvement in the aroma quality could be the particle size distribution of the main flow smoke, which is significantly influenced by different flow velocities and thus different smoldering temperatures of the tobacco. Experiments have shown, if one adapts the flow of the experimental and comparative cigarettes to one another, that the so-called coal taste and a decrease in the aroma quality occur.
Zur Einstellung des gewünschten Retentionsverhältnisses von stangseitigem zu mundseitigem Filterteil können für den mundsei- tigen Filterteil neben dem bekannten Acetat-Monofilter auch andere bekannte Ausführungsformen eingesetzt werden: Beispielsweise bietet eine koaxiale Konstruktion des mundseitigen Filterteils bekanntermaßen die Möglichkeit, gleichzeitig die gewünschte Retention und den gewünschten offenen Zugwiederstand der Cigarette unabhängig voneinander optimal einzustellen. To set the desired retention ratio of rod-side to mouth-side filter part, other known embodiments can be used for the mouth-side filter part in addition to the known acetate monofilter: for example, a coaxial construction of the mouth-side filter part is known to offer the possibility of simultaneously providing the desired retention and the desired open one Optimally adjust the drag of the cigarette independently.
TabellelTable

Claims

Patentansprüche claims
1. Filtercigarette mit einem Aktivkohle enthaltenden Filter mit: a) einem durch ein Cigarettenpapier umgebenen Tabakstrang; b) einem Doppelfilter, bei dem der strangseitige Teil aus einem kohlehaltigen Tissuepapier besteht, und mit c ) einer in Umfangsrichtung verlaufenden Filter-Ventilationszone im mundseitigen Teil aus Celluloseacetat; d) das Tissuepapier des strangseitigen Filterteils ist ein sehr voluminöses Papier, das 20 bis 50 Gew.-% mikrofein gemahlene Aktivkohle enthält; e) das Verhältnis der Kondensat-Retentionsleistungen von strangseitigem zu mundseitigem Filterteil beträgt zwischen 1 und 2; f ) die Luftdurchlässigkeit des Cigarettenpapiers beträgt 40 bis 100 Coresta-Einheiten; und g) der Filterventilationsgrad beträgt 5 bis 60 %.1. A filter cigarette with a filter containing activated carbon with: a) a tobacco rod surrounded by a cigarette paper; b) a double filter, in which the strand-side part consists of a carbon-containing tissue paper, and with c) a circumferential filter ventilation zone in the mouth-side part made of cellulose acetate; d) the tissue paper of the strand-side filter part is a very voluminous paper which contains 20 to 50% by weight of microfine ground activated carbon; e) the ratio of the condensate retention performances of the strand-side to the mouth-side filter part is between 1 and 2; f) the air permeability of the cigarette paper is 40 to 100 Coresta units; and g) the degree of filter ventilation is 5 to 60%.
2. Filtercigarette nach Anspruch 1, dadurch gekennzeichnet, daß das Tissuepapier des strangseitigen Filterteils 30 Gew.-% mikrofein gemahlene Aktivkohle enthält.2. Filter cigarette according to claim 1, characterized in that the tissue paper of the strand-side filter part contains 30 wt .-% microfine ground activated carbon.
3. Filtercigarette nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der strangseitige Teil des Filters ein Core- Filter mit einem Kern aus kohlehaltigem Tissuepapier nach einem der vorhergehenden Ansprüche ist, der von einem Mantel aus für den Hauptstromrauch nahezu undurchlässigem Material umgeben ist. 3. Filter cigarette according to claim 1 or 2, characterized in that the strand-side part of the filter is a core filter with a core of carbon-containing tissue paper according to one of the preceding claims, which is surrounded by a jacket made of material which is almost impermeable to the mainstream smoke.
EP97951904A 1997-11-13 1997-11-13 Cigarette with reduced gas phase Expired - Lifetime EP1028637B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PT97951904T PT1028637E (en) 1997-11-13 1997-11-13 CIGARETTES WITH REDUCED GASEOUS PHASE
SI9730409T SI1028637T1 (en) 1997-11-13 1997-11-13 Cigarette with reduced gas phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1997/006390 WO1999025210A1 (en) 1997-11-13 1997-11-13 Cigarette with reduced gas phase

Publications (2)

Publication Number Publication Date
EP1028637A1 true EP1028637A1 (en) 2000-08-23
EP1028637B1 EP1028637B1 (en) 2002-07-24

Family

ID=8166799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97951904A Expired - Lifetime EP1028637B1 (en) 1997-11-13 1997-11-13 Cigarette with reduced gas phase

Country Status (16)

Country Link
EP (1) EP1028637B1 (en)
JP (1) JP3387055B2 (en)
KR (1) KR20010032084A (en)
AT (1) ATE220862T1 (en)
BG (1) BG63987B1 (en)
DE (1) DE59707821D1 (en)
DK (1) DK1028637T3 (en)
EA (1) EA001556B1 (en)
EE (1) EE200000264A (en)
ES (1) ES2179383T3 (en)
HK (1) HK1035472A1 (en)
HU (1) HU228293B1 (en)
SK (1) SK283397B6 (en)
TR (1) TR200001355T2 (en)
UA (1) UA49097C2 (en)
WO (1) WO1999025210A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59707821D1 (en) * 1997-11-13 2002-08-29 Reemtsma H F & Ph GAS PHASE REDUCED CIGARETTE
DE102005005175A1 (en) * 2005-02-01 2006-08-10 Reemtsma Cigarettenfabriken Gmbh Filter cigarette
GB0619958D0 (en) * 2006-10-09 2006-11-15 Filtrona Int Ltd Tobacco smoke filter
DE102009016148A1 (en) * 2009-04-03 2010-10-14 Mcairlaid's Vliesstoffe Gmbh & Co. Kg Filter material for cleaning air and gases
KR20230056843A (en) * 2021-10-20 2023-04-28 주식회사 케이티앤지 Cigarette filter and cigarette comprising thereof

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US5271419A (en) * 1989-09-29 1993-12-21 R. J. Reynolds Tobacco Company Cigarette
US5360023A (en) * 1988-05-16 1994-11-01 R. J. Reynolds Tobacco Company Cigarette filter
US5365951A (en) * 1990-08-24 1994-11-22 Philip Morris Incorporated Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core
AU635095B2 (en) * 1990-08-24 1993-03-11 Philip Morris Products Inc. Concentric smoking filter having discrete tow and web filter media
DE4105500C1 (en) 1991-02-19 1992-06-17 H.F. & Ph.F. Reemtsma Gmbh & Co, 2000 Hamburg, De
GB9214267D0 (en) * 1992-07-04 1992-08-19 British American Tobacco Co Improvements relating to smoking articles
SE500634C2 (en) * 1992-12-22 1994-08-01 House Of Blend Ab fILTER TIP
US5404890A (en) * 1993-06-11 1995-04-11 R. J. Reynolds Tobacco Company Cigarette filter
US5685323A (en) * 1995-07-24 1997-11-11 R. J. Reynolds Tobacco Company Disposable filter attachment for smoking articles
US5839449A (en) * 1996-01-29 1998-11-24 R.J. Reynolds Tobacco Company Low CO cigarette
DE59707821D1 (en) * 1997-11-13 2002-08-29 Reemtsma H F & Ph GAS PHASE REDUCED CIGARETTE

Non-Patent Citations (1)

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Title
See references of WO9925210A1 *

Also Published As

Publication number Publication date
HU228293B1 (en) 2013-08-28
EA200000507A1 (en) 2000-10-30
EP1028637B1 (en) 2002-07-24
WO1999025210A1 (en) 1999-05-27
TR200001355T2 (en) 2000-09-21
EA001556B1 (en) 2001-04-23
SK6942000A3 (en) 2000-10-09
BG63987B1 (en) 2003-09-30
EE200000264A (en) 2001-06-15
JP3387055B2 (en) 2003-03-17
BG104522A (en) 2001-01-31
JP2001522616A (en) 2001-11-20
DE59707821D1 (en) 2002-08-29
ATE220862T1 (en) 2002-08-15
UA49097C2 (en) 2002-09-16
SK283397B6 (en) 2003-07-01
HUP0100096A3 (en) 2001-06-28
DK1028637T3 (en) 2002-11-11
ES2179383T3 (en) 2003-01-16
HK1035472A1 (en) 2001-11-30
KR20010032084A (en) 2001-04-16
HUP0100096A2 (en) 2001-05-28

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