EP0254004B1 - Aerated cigarette - Google Patents

Aerated cigarette Download PDF

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Publication number
EP0254004B1
EP0254004B1 EP87108239A EP87108239A EP0254004B1 EP 0254004 B1 EP0254004 B1 EP 0254004B1 EP 87108239 A EP87108239 A EP 87108239A EP 87108239 A EP87108239 A EP 87108239A EP 0254004 B1 EP0254004 B1 EP 0254004B1
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EP
European Patent Office
Prior art keywords
tobacco
zone
filaments
cigarette
filter
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.)
Expired - Lifetime
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EP87108239A
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German (de)
French (fr)
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EP0254004A3 (en
EP0254004A2 (en
Inventor
Dieter Dr.Rer.Nat Dipl.-Chem. Imbery
Eberhard Dipl.-Chem. Teufel
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Cerdia Produktions GmbH
Original Assignee
Rhone Poulenc Rhodia AG
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Publication date
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Priority to AT87108239T priority Critical patent/ATE100286T1/en
Publication of EP0254004A2 publication Critical patent/EP0254004A2/en
Publication of EP0254004A3 publication Critical patent/EP0254004A3/en
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Publication of EP0254004B1 publication Critical patent/EP0254004B1/en
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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
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • 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

Definitions

  • the invention relates to a ventilated cigarette, the mouthpiece zone of which consists of tobacco or a filter or a hollow mouthpiece and there contains at least one ventilation zone in the casing or wall, wherein in the mouthpiece zone or between this and the tobacco rod or in the latter a polymeric non-crimped staple fibers and / or filaments existing element is arranged so that it is, seen from the mouth-facing end of the mouthpiece zone, behind the ventilation zone, the staple fibers and filaments each having a diameter of 0.1 to 20 microns.
  • a generic ventilated cigarette is known from German Offenlegungsschrift (DE-A) 22 43 349, the mouthpiece zone of which consists of a filter or a hollow mouthpiece and there contains air holes in the casing or wall, with a disc of a tightly packed one between the mouthpiece zone and the tobacco rod Layer of fine fibers is arranged so that it is from the mouth-facing end of the mouthpiece zone, behind the air holes, the fine fibers, which consist for example of a synthetic textile material, each from 0.01 to 10 microns or 0.1 to 100 microns.
  • a filter for tobacco smoke which is composed of several filter elements, at least one of the filter elements consisting entirely of non-crimped fibers made of thermoplastic polymeric non-absorbent material, which have a diameter of less than about 5 microns and the like the greater part is arranged so that the fibers are transverse to the tobacco smoke flow.
  • this known filter is one without a ventilation zone (s).
  • this known filter has the disadvantage that it becomes clogged after only a few puffs when a cigarette provided with such a filter is smoked, ie that a large amount of condensate is very quickly deposited on the filter element made of non-crimped fibers made of thermoplastic polymeric non-absorbent material, which means the draw resistance is increased excessively.
  • the invention has for its object to provide a ventilated cigarette of the type described above, with which the smoke yield and taste are evened out and the overall smoke values are lowered both in the particle and in the gas phase.
  • polymer blends or copolymers can also be used.
  • the staple fibers and filaments of an element according to the invention consist of a single, ie of the same polymeric material; however, the element can also consist of a mixture of staple fibers and / or filaments made of two or more polymeric materials.
  • the staple fibers and filaments of an element according to the invention can have the same diameter; however, it can also be staple fibers and filaments of different diameters.
  • the element according to the invention is preferably located at a distance of up to 30 mm from the end of the mouthpiece zone facing the mouth.
  • the staple fibers and filaments of an element according to the invention each have a diameter of 1 to 5 ⁇ m.
  • Table 3 shows the values determined for the degree of ventilation and the draft resistance for the filter cigarette C during smoking.
  • Table 3 train Degree of ventilation in percent Draw resistance in Pascal 0 17.5 1028 1 20.0 1125 2nd 22.4 1241 3rd 21.8 1226 4th 21.7 1230 5 20.6 1213 6 19.9 1200 7 20.5 1255 8th 19.9 1246 9 21.9 1376
  • Tables 2 and 3 show in particular that the degree of ventilation of the original filter cigarette only increases by about 11 percent up to the ninth pull, while the degree of ventilation of the filter cigarette C increases by about 25 percent, which ultimately leads to a smoothing of the Tobacco smoke yield per train and thus also leads to a reduction in the overall smoke yield in both the particle and the gas phase.
  • Table 4 shows the values determined for the degree of ventilation and the draw resistance for the filter cigarette A during smoking.
  • Table 4 train Degree of ventilation in percent Draw resistance in Pascal 0 23.7 1298 1 26.7 1437 2nd 30.1 1604 3rd 30.0 1624 4th 30.6 1676 5 31.6 1767 6 32.3 1862 7 34.5 2029 8th 37.3 2267 9 43.0 2609
  • Table 5 shows the ventilation degree and draft resistance values determined for filter cigarette B during smoking.
  • Table 5 train Degree of ventilation in percent Draw resistance in Pascal 0 32.3 1692 1 34.5 1809 2nd 37.8 1991 3rd 39.1 2061 4th 41.2 2184 5 43.5 2325 6 47.2 2557 7 53.2 2945 8th 64.4 3695 9 74.3 4277
  • discs A and B in the - ventilated - filter cigarettes achieve a very significant increase in the degree of ventilation during smoking, which naturally leads to a very strong equalization of the smoke yields per train and a reduction the total smoke yield per cigarette leads.
  • the invention has the following advantages:
  • the ventilated cigarette according to the invention shows - compared to commercially available ventilated cigarettes - an equalization of the smoke yield when smoking step by step, whereby the taste of the tobacco smoke remains practically the same during the smoking. Furthermore, a reduction in the overall smoke yield is achieved in both the particle and the gas phase per cigarette.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Stored Programmes (AREA)
  • Vending Machines For Individual Products (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Medicinal Preparation (AREA)

Abstract

Ventilated cigarettes are made with a tip zone consisting of tobacco or a filter or a hollow tip, which contains, in the wrapper or wall, at least one ventilation zone. In the tip zone or between it and the tobacco roll, or in the latter, there is placed an element which consists of polymeric, not crimped spun fibers and/or filaments, which may have the shape of a disk. This element is arranged in such a manner that it is located behind the ventilation zone, when seen from the end of the tip zone facing the mouth. The spun fibers and filaments have, respectively, a diameter between 0.1 and 20 mu m and lie generally transverse to the flow of the tobacco smoke. In contrast with the known ventilated cigarettes, the cigarettes according to the invention exhibit an equalization of the tobacco smoke yield during test smoking draw-by-draw, which keeps the smoke flavor during test smoking practically uniform and results in a lowering of the total smoke yield in the particle phase as well as in the gas phase per cigarette.

Description

Die Erfindung betrifft eine ventilierte Zigarette, deren Mundstückszone aus Tabak oder einem Filter oder einem Hohlmundstück besteht und dort in der Umhüllung oder Wandung zumindest eine Ventilationszone enthält, wobei in der Mundstückszone oder zwischen dieser und dem Tabakstrang oder in letzterem ein aus polymeren nichtgekräuselten Spinnfasern und/oder Filamenten bestehendes Element so angeordnet ist, daß es sich, von dem dem Mund zugekehrten Ende der Mundstückszone aus gesehen, hinter der Ventilationszone befindet, wobei die Spinnfasern und Filamente jeweils einen Durchmesser von 0,1 bis 20 µm besitzen.The invention relates to a ventilated cigarette, the mouthpiece zone of which consists of tobacco or a filter or a hollow mouthpiece and there contains at least one ventilation zone in the casing or wall, wherein in the mouthpiece zone or between this and the tobacco rod or in the latter a polymeric non-crimped staple fibers and / or filaments existing element is arranged so that it is, seen from the mouth-facing end of the mouthpiece zone, behind the ventilation zone, the staple fibers and filaments each having a diameter of 0.1 to 20 microns.

Aus Ergebnissen von Zug-für-Zug-Analysen an - handelsüblichen - Zigaretten mit einer Mundstückszone aus Tabak oder einem Filter oder einem Hohlmundstück ist es bekannt, daß die Tabakrauchausbeute beim Abrauchen von Zug zu Zug ansteigt.
Dieses kann u.a. zur Folge haben, daß sich der Geschmack des Tabakrauchs zugweise ändert.
Daher ist eine Vergleichmäßigung der Rauchausbeute pro Zug beim Abrauchen vor allem aus geschmacklichen Gründen erstrebenswert.
Eine Vergleichmäßigung der Rauchausbeute von Zug zu Zug ist auch deshalb wünschenswert, da damit eine Erniedrigung der Gesamtrauchausbeute sowohl in der Partikel- als auch in der Gasphase erreicht wird.From results of train-by-train analyzes on - commercially available - cigarettes with a mouthpiece zone made of tobacco or a filter or a hollow mouthpiece, it is known that the tobacco smoke yield increases from train to train.
Among other things, this can mean that the taste of tobacco smoke changes occasionally.
It is therefore desirable to equalize the smoke yield per train when smoking, primarily for reasons of taste.
An equalization of the smoke yield from train to train is also desirable because it reduces the overall smoke yield both in the particle and in the gas phase.

In der Literatur gibt es Ansätze zur Lösung der zuvor geschilderten Probleme:
So ist in der US-Patentschrift 3 526 904 eine ventilierte Zigarette beschrieben, bei der ein schmelzbarer Polymerfilm Teile der Ventilationszone am Tabakstrang abdeckt; nach dem Schmelzen des Polymerfilms - durch die nahende Glutzone - kommt es zu einer Erhöhung der Strangventilation.There are approaches in the literature to solve the problems described above:
A ventilated cigarette is described in US Pat. No. 3,526,904, in which a meltable polymer film forms parts of the ventilation zone covering on the tobacco rod; after the polymer film has melted - due to the approaching glowing zone - there is an increase in strand ventilation.

Außerdem beschreiben Crellin et al. in "Beiträge zur Tabakforschung" 8, 70 (1975) ein ventiliertes Zigarettenfilter, bei dem das tabakseitige Filterende von einer unter Einfluß von Wärme schrumpfenden Folie umgeben ist. Durch diese Folie wird ein künstliches Kollabieren des Filters erzeugt, wodurch der Zugwiderstand im tabakseitigen Teil des Filters ansteigt und damit eine Erhöhung des Ventilationsgrades erzeugt wird.In addition, Crellin et al. in "Contributions to Tobacco Research" 8 , 70 (1975) a ventilated cigarette filter in which the tobacco end of the filter is surrounded by a film which shrinks under the influence of heat. This film creates an artificial collapse of the filter, which increases the tensile resistance in the tobacco-side part of the filter and thus increases the degree of ventilation.

Gemäß der deutschen Offenlegungsschrift (DE-A) 27 45 028 wird bei einem Filter für Tabakrauchwaren eine Ventilationsgraderhöhung mit Hilfe einer tabakseitig angebrachten Rauchbeschleunigungsöffnung erreicht.According to German Offenlegungsschrift (DE-A) 27 45 028, a ventilation degree increase is achieved with a filter for tobacco products with the help of a smoke acceleration opening on the tobacco side.

Ferner ist aus der deutschen Offenlegungsschrift (DE-A) 22 43 349 eine gattungsgemäße ventilierte Zigarette bekannt, deren Mundstückszone aus einem Filter oder einem Hohlmundstück besteht und dort in der Umhüllung oder Wandung Luftlöcher enthält, wobei zwischen der Mundstückszone und dem Tabakstrang eine Scheibe einer dichtgepackten Schicht von feinen Fasern so angeordnet ist, daß sie sich, von dem dem Mund zugekehrten Ende der Mundstückszone aus gesehen, hinter den Luftlöchern befindet, wobei die feinen Fasern, die beispielsweise aus einem synthetischen textilen Werkstoff bestehen, jeweils einen Durchmesser von 0,01 bis 10 Mikrometer oder von 0,1 bis 100 Mikrometer besitzen. Mit dem aus der zuvor erwähnten Scheibe bestehenden Filter wird erreicht, daß das Druckgefälle in der Scheibe während der letzten Züge durch die zunehmende Verstopfung der Poren der dichtgepackten Schicht durch die aufgenommenen Feststoffteilchen in zunehmendem Maße ansteigt, wodurch wiederum eine erhöhte Filterleistung erreicht wird; außerdem sollen sich - durch die Luftlöcher - nur geringe Schwankungen des Gesamtdruckgefälles ergeben.Furthermore, a generic ventilated cigarette is known from German Offenlegungsschrift (DE-A) 22 43 349, the mouthpiece zone of which consists of a filter or a hollow mouthpiece and there contains air holes in the casing or wall, with a disc of a tightly packed one between the mouthpiece zone and the tobacco rod Layer of fine fibers is arranged so that it is from the mouth-facing end of the mouthpiece zone, behind the air holes, the fine fibers, which consist for example of a synthetic textile material, each from 0.01 to 10 microns or 0.1 to 100 microns. With the filter consisting of the aforementioned disk, it is achieved that the pressure drop in the disk increases during the last puffs due to the increasing blockage of the pores of the densely packed layer by the ingested solid particles, which in turn increases, in turn Filter performance is achieved; in addition - due to the air holes - there should only be slight fluctuations in the overall pressure drop.

Aus der deutschen Patentschrift 23 21 247 ist bereits ein Filter für Tabakrauch bekannt, das sich aus mehreren Filterelementen zusammensetzt, wobei wenigstens eines der Filterelemente vollständig aus nichtgekräuselten Fasern aus thermoplastischem polymerem nichtabsorbierendem Material besteht, die einen Durchmesser von weniger als etwa 5 Mikron besitzen und deren größerer Teil so angeordnet ist, daß die Fasern quer zur Tabakrauchströmung liegen. Bei diesem bekannten Filter handelt es sich jedoch um ein solches ohne Ventilationszone(n).
Ferner zeigt dieses bekannte Filter den Nachteil, daß es beim Abrauchen einer mit einem solchen Filter versehenen Zigarette bereits nach wenigen Zügen verstopft, d.h., daß sehr rasch eine große Menge an Kondensat auf das Filterelement aus nichtgekräuselten Fasern aus thermoplastischem polymerem nichtabsorbierendem Material abgeschieden wird, wodurch der Zugwiderstand übermäßig erhöht wird.From German Patent 23 21 247 a filter for tobacco smoke is already known, which is composed of several filter elements, at least one of the filter elements consisting entirely of non-crimped fibers made of thermoplastic polymeric non-absorbent material, which have a diameter of less than about 5 microns and the like the greater part is arranged so that the fibers are transverse to the tobacco smoke flow. However, this known filter is one without a ventilation zone (s).
Furthermore, this known filter has the disadvantage that it becomes clogged after only a few puffs when a cigarette provided with such a filter is smoked, ie that a large amount of condensate is very quickly deposited on the filter element made of non-crimped fibers made of thermoplastic polymeric non-absorbent material, which means the draw resistance is increased excessively.

Der Erfindung liegt die Aufgabe zugrunde, eine ventilierte Zigarette der eingangs beschriebenen Gattung zur Verfügung zu stellen, mit der eine Vergleichmäßigung von Rauchausbeute und Geschmack und eine Erniedigung der Gesamtrauchwerte sowohl in der Partikel- als auch in der Gasphase erreicht wird.The invention has for its object to provide a ventilated cigarette of the type described above, with which the smoke yield and taste are evened out and the overall smoke values are lowered both in the particle and in the gas phase.

Diese Aufgabe wird bei einer ventilierten Zigarette der eingangs genannten Art durch die im Patentanspruch 1 angegebenen Maßnahmen gelöst.This object is achieved in a ventilated cigarette of the type mentioned by the measures specified in claim 1.

Vorteilhafte Ausführungsformen der erfindungsgemäßen ventilierten Zigarette sind in den Ansprüchen 2,3 und 4 angegeben.Advantageous embodiments of the ventilated cigarette according to the invention are specified in claims 2, 3 and 4.

Das Element gemäß der Erfindung kann

  • aus einem Gemisch von Spinnfasern (Stapelfasern), also Fasern endlicher Länge, und Filamenten, also endlosen Fäden,
oder
  • nur aus Spinnfasern
oder
  • nur aus Filamenten
bestehen.The element according to the invention can
  • from a mixture of staple fibers (staple fibers), i.e. fibers of finite length, and filaments, i.e. endless threads,
or
  • only from staple fibers
or
  • only from filaments
consist.

Die Spinnfasern und Filamente gemäß der Erfindung können aus natürlichen oder synthetischen thermoplastischen, polymeren Materialien bestehen, die sich zu Spinnfasern und Filamenten mit einem Durchmesser von 0,1 bis 20 µm verformen lassen. Beispiele für solche Materialien sind

  • Polyolefine, wie Polypropylen und Polyethylen, aber auch substituierte Polyolefine, wie Polytrifluorethylen,
  • Polyamide, wie Nylon-66, Nylon-6 und Nylon 610,
  • Polyester, wie Polyethylenterephthalat
  • Poly-(methylmethacrylat),
  • Polystyrol.
The staple fibers and filaments according to the invention can consist of natural or synthetic thermoplastic, polymeric materials which can be shaped into staple fibers and filaments with a diameter of 0.1 to 20 μm. Examples of such materials are
  • Polyolefins, such as polypropylene and polyethylene, but also substituted polyolefins, such as polytrifluoroethylene,
  • Polyamides such as nylon-66, nylon-6 and nylon 610,
  • Polyesters such as polyethylene terephthalate
  • Poly (methyl methacrylate),
  • Polystyrene.

Es können jedoch auch Polymerenmischungen oder Copolymere verwendet werden.However, polymer blends or copolymers can also be used.

Im allgemeinen bestehen die Spinnfasern und Filamente eines Elements gemäß der Erfindung aus einem einzigen, also aus dem gleichen polymeren Material; das Element kann jedoch auch aus einem Gemisch von Spinnfasern und/oder Filamenten aus zwei oder mehreren polymeren Materialien bestehen.In general, the staple fibers and filaments of an element according to the invention consist of a single, ie of the same polymeric material; however, the element can also consist of a mixture of staple fibers and / or filaments made of two or more polymeric materials.

Die Spinnfasern und Filamente eines Elements gemäß der Erfindung können denselben Durchmesser aufweisen; es kann sich jedoch auch um Spinnfasern und Filamente unterschiedlichen Durchmessers handeln.The staple fibers and filaments of an element according to the invention can have the same diameter; however, it can also be staple fibers and filaments of different diameters.

Bevorzugt befindet sich das Element gemäß der Erfindung in einem Abstand von bis zu 30 mm von dem dem Mund zugekehrten Ende der Mundstückszone.The element according to the invention is preferably located at a distance of up to 30 mm from the end of the mouthpiece zone facing the mouth.

Schließlich ist es von Vorteil, wenn die Spinnfasern und Filamente eines Elements gemäß der Erfindung jeweils einen Durchmesser von 1 bis 5 µm besitzen.Finally, it is advantageous if the staple fibers and filaments of an element according to the invention each have a diameter of 1 to 5 μm.

Die Erfindung wird nachstehend anhand eines Beispiels näher erläutert:The invention is explained in more detail below using an example:

Beispielexample

Polypropylen mit einem Schmelzindex von 13 g/10 min bei 230°C/2,16 kg, einer Dichte von 0,902 g/cm bei 23°C und einem Schmelzbereich von 165-170°C wurde geschmolzen und mit Hilfe eines Spinnkopfs ähnlich dem gemäß der deutschen Patentschrift 25 50 463 zu Spinnfasern und Filamenten versponnen (blasgesponnen). Die Spinnfasern und Filamente wurden durch Ablage auf einer rotierenden Trommel zu einem Spinnvlies umgeformt.
Durch Änderung der Spinnparameter, insbesondere des Drucks der aus dem Spinnkopf austretenden Luft, die zur Bildung und Verstreckung der Spinnfasern und Filamente beiträgt, wurden in drei Versuchen folgende Spinnvliese erhalten:

  • Spinnvlies A mit einem Quadratmetergewicht von 85 g und einer Luftdurchlässigkeit von 65 l/min.cm² bei 50 Pascal (ca. 5 mm Wassersäule), bestehend aus Spinnfasern und Filamenten, die einen mittleren Durchmesser von 2 µm aufwiesen;
  • Spinnvlies B mit einem Quadratmetergewicht von 85 g und einer Luftdurchlässigkeit von 21 l/min.cm² bei 50 Pascal, bestehend aus Spinnfasern und Filamenten, die einen mittleren Durchmesser von 1,4 µm aufwiesen;
  • Spinnvlies C mit einem Quadratmetergewicht von 85 g und einer Luftdurchlässigkeit von 202 l/min.cm² bei 50 Pascal, bestehend aus Spinnfasern und Filamenten, die einen mittleren Durchmesser von 4,8 µm aufwiesen.
Polypropylene with a melt index of 13 g / 10 min at 230 ° C / 2.16 kg, a density of 0.902 g / cm at 23 ° C and a melting range of 165-170 ° C was melted using a spinning head similar to that in accordance with German patent 25 50 463 spun into staple fibers and filaments (blow-spun). The staple fibers and filaments were formed into a spunbonded fabric by being placed on a rotating drum.
By changing the spinning parameters, in particular the pressure of the air emerging from the spinning head, which contributes to the formation and drawing of the staple fibers and filaments, the following spunbonded webs were obtained in three experiments:
  • Spunbond A with a square meter weight of 85 g and an air permeability of 65 l / min.cm² at 50 Pascal (approx. 5 mm water column), consisting of spun fibers and filaments, which had an average diameter of 2 µm;
  • Spunbond nonwoven B with a weight of 85 g / m² and an air permeability of 21 l / min.cm² at 50 Pascal, consisting of spun fibers and filaments, which had an average diameter of 1.4 µm;
  • Spunbond C with a weight per square meter of 85 g and an air permeability of 202 l / min.cm² at 50 Pascal, consisting of spun fibers and filaments that had an average diameter of 4.8 µm.

Aus den Spinnvliesen A, B und C wurden jeweils runde Plättchen (Scheibchen) mit einem dem Durchmesser des Tabakstrangs und des Filterkörpers einer handelsüblichen Filterzigarette - mit einer Ventilationszone in der Umhüllung des Filterkörpers - entsprechenden Durchmesser ausgestanzt.
Die Scheibchen, nach den Spinnvliesen, denen sie entstammen, Scheibchen A , B und C genannt, wurden in die zuvor erwähnten ventilierten Filterzigaretten zwischen dem Tabakstrang und dem Filterkörper, der aus üblichen gekräuselten Cellulose-2,5-Acetatfasern bestand, eingesetzt (selbstverständlich wurde danach wieder eine übliche Umhüllung angebracht), so daß die Filterzigaretten A, B und C entstanden.
Die Spinnfasern und Filamente der Scheibchen waren im wesentlichen quer zur Strömungsbahn des Tabakrauchs angeordnet.Round flakes (slices) with a diameter corresponding to the diameter of the tobacco rod and the filter body of a commercially available filter cigarette - with a ventilation zone in the casing of the filter body - were punched out of the spunbonded fabrics A, B and C.
The discs, named after the spunbonded fabrics from which they come, discs A, B and C, were inserted into the ventilated filter cigarettes mentioned above between the tobacco rod and the filter body, which consisted of conventional crimped cellulose-2.5-acetate fibers (of course afterwards a usual wrapping was attached again), so that the filter cigarettes A, B and C were created.
The staple fibers and filaments of the disks were arranged essentially across the flow path of the tobacco smoke.

Bedingt durch den Einbau der Scheibchen steigt gegenüber der erwähnten Original-Filterzigarette und je nach Luftdurchlässigkeit der Scheibchen der Anfangs-Zugwiderstand und damit der Anfangs-Ventilationsgrad der Filterzigaretten A, B und C geringfügig an, wie die nachstehende Tabelle 1 zeigt: Tabelle 1 Anfangs-Zugwiderstand in Pascal Anfangs-Ventilationsgrad in Prozent Original-Filterzigarette 955 14,7 Filterzigarette A 1298 23,7 Filterzigarette B 1692 32,3 Filterzigarette C 1028 17,5 Due to the installation of the discs, the initial tensile resistance and thus the initial degree of ventilation of the filter cigarettes A, B and C increase slightly compared to the original filter cigarette mentioned and depending on the air permeability of the discs, as Table 1 below shows: Table 1 Initial draw resistance in pascals Initial degree of ventilation in percent Original filter cigarette 955 14.7 Filter cigarette A 1298 23.7 Filter cigarette B 1692 32.3 Filter cigarette C 1028 17.5

An den zuvor genannten Zigaretten, also an der Original-Filterzigarette und den Filterzigaretten A , B und C wurden Ventilationsgrad- und Zugwiderstandsmessungen während des Rauchens vorgenommen. Die Messungen erfolgten mit einer Meßvorrichtung, die es ermöglicht, Zug-für-Zug unter CORESTA-Normbedingungen (CORESTA = CENTRE DE COOPERATION POUR LES RECHERCHES SCIENTIFIQUES RELATIVES AU TABAC) den Zugwiderstand und den Ventilationsgrad zu ermitteln.On the aforementioned cigarettes, i.e. on the original filter cigarette and filter cigarettes A, B and C, ventilation degree and draft resistance measurements were made during smoking. The measurements were carried out with a measuring device that makes it possible to determine the train resistance and the degree of ventilation train-by-train under CORESTA standard conditions (CORESTA = CENTER DE COOPERATION POUR LES RECHERCHES SCIENTIFIQUES RELATIVES AU TABAC).

Der Verlauf von Zugwiderstandskurven während des Rauchens wurde bereits von R.R. Baker in "Beiträge zur Tabakforschung" 8, 124 (1975) beschrieben, wo auch die Grundlage des "Heiß-Gas-Modells" theoretisch berechnet ist. Die nach diesem Beispiel ermittelten Meßwerte für die Original-Filterzigarette folgen jenem Modell, und es wurde ein ähnlicher Verlauf der Ventilationsgradkurve gefunden. Die nachfolgende Tabelle 2 zeigt die ermittelten Ventilationsgrad- und Zugwiderstandswerte für die Original-Filterzigarette während des Rauchens. Tabelle 2 Zug Ventilationsgrad in Prozent Zugwiderstand in Pascal 0 14,7 955 1 17,3 1068 2 18,9 1163 3 18,2 1159 4 17,2 1144 5 16,0 1114 6 15,1 1104 7 15,2 1151 8 15,1 1178 9 16,3 1203 The course of draft resistance curves during smoking has already been described by RR Baker in "Contributions to Tobacco Research" 8 , 124 (1975), where the basis of the "hot gas model" is also theoretically calculated. The measured values for the original filter cigarette determined according to this example follow that model, and a similar course of the ventilation degree curve was found. Table 2 below shows the ventilation degree and draft resistance values determined for the original filter cigarette during smoking. Table 2 train Degree of ventilation in percent Draw resistance in Pascal 0 14.7 955 1 17.3 1068 2nd 18.9 1163 3rd 18.2 1159 4th 17.2 1144 5 16.0 1114 6 15.1 1104 7 15.2 1151 8th 15.1 1178 9 16.3 1203

Die Tabelle 3 zeigt die ermittelten Werte des Ventilationsgrads und des Zugwiderstands für die Filterzigarette C während des Rauchens. Tabelle 3 Zug Ventilationsgrad in Prozent Zugwiderstand in Pascal 0 17,5 1028 1 20,0 1125 2 22,4 1241 3 21,8 1226 4 21,7 1230 5 20,6 1213 6 19,9 1200 7 20,5 1255 8 19,9 1246 9 21,9 1376 Table 3 shows the values determined for the degree of ventilation and the draft resistance for the filter cigarette C during smoking. Table 3 train Degree of ventilation in percent Draw resistance in Pascal 0 17.5 1028 1 20.0 1125 2nd 22.4 1241 3rd 21.8 1226 4th 21.7 1230 5 20.6 1213 6 19.9 1200 7 20.5 1255 8th 19.9 1246 9 21.9 1376

Den Tabellen 2 und 3 ist insbesondere zu entnehmen, daß der Ventilationsgrad der Original-Filterzigarette bis zum neunten Zug nur um etwa 11 Prozent ansteigt, während der Ventilationsgrad der Filterzigarette C jedoch um etwa 25 Prozent ansteigt, was letztendlich zu einer Vergleichmäßigung der Tabakrauchausbeute pro Zug und damit auch zu einer Erniedrigung der Gesamtrauchausbeute sowohl in der Partikel - als auch in der Gasphase führt.Tables 2 and 3 show in particular that the degree of ventilation of the original filter cigarette only increases by about 11 percent up to the ninth pull, while the degree of ventilation of the filter cigarette C increases by about 25 percent, which ultimately leads to a smoothing of the Tobacco smoke yield per train and thus also leads to a reduction in the overall smoke yield in both the particle and the gas phase.

Die nachstehende Tabelle 4 zeigt die ermittelten Werte für den Ventilationsgrad und den Zugwiderstand für die Filterzigarette A während des Rauchens. Tabelle 4 Zug Ventilationsgrad in Prozent Zugwiderstand in Pascal 0 23,7 1298 1 26,7 1437 2 30,1 1604 3 30,0 1624 4 30,6 1676 5 31,6 1767 6 32,3 1862 7 34,5 2029 8 37,3 2267 9 43,0 2609 Table 4 below shows the values determined for the degree of ventilation and the draw resistance for the filter cigarette A during smoking. Table 4 train Degree of ventilation in percent Draw resistance in Pascal 0 23.7 1298 1 26.7 1437 2nd 30.1 1604 3rd 30.0 1624 4th 30.6 1676 5 31.6 1767 6 32.3 1862 7 34.5 2029 8th 37.3 2267 9 43.0 2609

Die nachfolgende Tabelle 5 zeigt die ermittelten Ventilationsgrad- und Zugwiderstandswerte für die Filterzigarette B während des Rauchens. Tabelle 5 Zug Ventilationsgrad in Prozent Zugwiderstand in Pascal 0 32,3 1692 1 34,5 1809 2 37,8 1991 3 39,1 2061 4 41,2 2184 5 43,5 2325 6 47,2 2557 7 53,2 2945 8 64,4 3695 9 74,3 4277 Table 5 below shows the ventilation degree and draft resistance values determined for filter cigarette B during smoking. Table 5 train Degree of ventilation in percent Draw resistance in Pascal 0 32.3 1692 1 34.5 1809 2nd 37.8 1991 3rd 39.1 2061 4th 41.2 2184 5 43.5 2325 6 47.2 2557 7 53.2 2945 8th 64.4 3695 9 74.3 4277

Wie den Tabellen 4 und 5 zu entnehmen ist, wird durch die Scheibchen A und B bei den - ventilierten - Filterzigaretten eine sehr deutliche Ventilationsgraderhöhung während des Rauchens erreicht, was naturgemäß zu einer sehr starken Vergleichmäßigung der Rauchausbeuten pro Zug und einer Verminderung der Gesamtrauchausbeute pro Zigarette führt.As can be seen in Tables 4 and 5, discs A and B in the - ventilated - filter cigarettes achieve a very significant increase in the degree of ventilation during smoking, which naturally leads to a very strong equalization of the smoke yields per train and a reduction the total smoke yield per cigarette leads.

Schließlich wurden mit der Original-Filterzigarette und den Filterzigaretten A und B noch Zug-für-Zug-Rauchanalysen unter CORESTA-Normbedingungen durchgeführt. Wie die nachstehenden Tabellen 6, 7 und 8 zeigen, und wie auf Grund der Ventilationsgradmessungen zu erwarten war, ergab sich bei den Filterzigaretten A und B - gegenüber der Original-Filterzigarette - eine deutliche Vergleichmäßigung der Zug-für-Zug gebildeten Tabakrauchmenge und damit eine sehr starke Erniedrigung der Gesamtrauchausbeute pro Zigarette. Tabelle 6 Original-Filterzigarette Zug Nikotin im Tabakrauch in mg Gesamtkondensat im Tabakrauch in mg 1 0,047 0,83 2 0,082 1,61 3 0,104 1,67 4 0,121 1,82 5 0,131 2,02 6 0,134 2,16 7 0,145 2,32 Σ pro Zigarette 0,764 12,43 Tabelle 7 Filterzigarette A Zug Nikotin im Tabakrauch in mg Gesamtkondensat im Tabakrauch in mg 1 0,030 0,59 2 0,053 0,82 3 0,069 1,01 4 0,076 1,15 5 0,087 1,27 6 0,091 1,36 7 0,100 1,61 Σ pro Zigarette 0,506 7,81 Tabelle 8 Filterzigarette B Zug Nikotin im Tabakrauch in mg Gesamtkondensat im Tabakrauch in mg 1 0,018 0,36 2 0,030 0,46 3 0,036 0,56 4 0,043 0,61 5 0,045 0,66 6 0,047 0,69 7 0,050 0,78 Σ pro Zigarette 0,269 4,12 Finally, with the original filter cigarette and filter cigarettes A and B, train-by-train smoke analyzes were carried out under CORESTA standard conditions. As Tables 6, 7 and 8 below show, and as was to be expected on the basis of the ventilation degree measurements, the filter cigarettes A and B - compared to the original filter cigarette - showed a clear homogenization of the amount of tobacco smoke produced train by train and thus a very strong reduction in the total smoke yield per cigarette. Table 6 Original filter cigarette train Nicotine in tobacco smoke in mg Total condensate in tobacco smoke in mg 1 0.047 0.83 2nd 0.082 1.61 3rd 0.104 1.67 4th 0.121 1.82 5 0.131 2.02 6 0.134 2.16 7 0.145 2.32 Σ per cigarette 0.764 12.43 Filter cigarette A train Nicotine in tobacco smoke in mg Total condensate in tobacco smoke in mg 1 0.030 0.59 2nd 0.053 0.82 3rd 0.069 1.01 4th 0.076 1.15 5 0.087 1.27 6 0.091 1.36 7 0.100 1.61 Σ per cigarette 0.506 7.81 Filter cigarette B train Nicotine in tobacco smoke in mg Total condensate in tobacco smoke in mg 1 0.018 0.36 2nd 0.030 0.46 3rd 0.036 0.56 4th 0.043 0.61 5 0.045 0.66 6 0.047 0.69 7 0.050 0.78 Σ per cigarette 0.269 4.12

Die Erfindung weist folgende Vorteile auf:
Die erfindungsgemäße ventilierte Zigarette zeigt - gegenüber handelsüblichen ventilierten Zigaretten - eine Vergleichmäßigung der Rauchausbeute beim Abrauchen Zug für Zug, wodurch der Geschmack des Tabakrauchs während des Abrauchens praktisch gleich bleibt.
Ferner wird damit eine Erniedrigung der Gesamtrauchausbeute sowohl in der Partikel - als auch in der Gasphase pro Zigarette erreicht.The invention has the following advantages:
The ventilated cigarette according to the invention shows - compared to commercially available ventilated cigarettes - an equalization of the smoke yield when smoking step by step, whereby the taste of the tobacco smoke remains practically the same during the smoking.
Furthermore, a reduction in the overall smoke yield is achieved in both the particle and the gas phase per cigarette.

Claims (4)

  1. An aerated cigarette whose mouthpiece zone consists of tobacco or a filter or a hollow mouthpiece and contains there in the wrap or wall at least one ventilation zone, wherein in the mouthpiece zone or between the latter and the tobacco strand, or in the latter, there is arranged an element consisting of polymeric noncrimped spun fibres and/or filaments in such a way that it is disposed, as viewed from the mouthpiece zone facing the mouth, behind the ventilation zone, wherein the spun fibres and filaments respectively have a diameter of 0.1 to 20 µm, characterized in that the spun fibres and filaments are arranged in essence transversely to the flow path of the tobacco smoke and that the element has an air permeability of 21 l/min.cm² to 202 l/min.cm² at 50 pascal.
  2. An aerated cigarette according to claim 1, characterized in that the element has the shape of a disc, a sphere or an annular shape.
  3. An aerated cigarette according to claim 1 or 2, characterized in that the element fills partly or completely the cross-section of the mouthpiece zone or of the tobacco strand.
  4. An aerated cigarette according to claim 1, 2 or 3, characterized in that the element is a disc manufactured from a spun fleece consisting of polypropylene spun fibres and polypropylene spun filaments, the spun fleece having a weight of 85 g per square meter and an air permeability of 21 l/min.cm² at 50 pascal.
EP87108239A 1986-07-22 1987-06-06 Aerated cigarette Expired - Lifetime EP0254004B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108239T ATE100286T1 (en) 1986-07-22 1987-06-06 VENTED CIGARETTE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3624661 1986-07-22
DE19863624661 DE3624661A1 (en) 1986-07-22 1986-07-22 VENTILATED CIGARETTE

Publications (3)

Publication Number Publication Date
EP0254004A2 EP0254004A2 (en) 1988-01-27
EP0254004A3 EP0254004A3 (en) 1990-07-11
EP0254004B1 true EP0254004B1 (en) 1994-01-19

Family

ID=6305657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108239A Expired - Lifetime EP0254004B1 (en) 1986-07-22 1987-06-06 Aerated cigarette

Country Status (9)

Country Link
US (1) US4809717A (en)
EP (1) EP0254004B1 (en)
JP (1) JPS6342680A (en)
AT (1) ATE100286T1 (en)
AU (1) AU579771B2 (en)
DE (2) DE3624661A1 (en)
ES (1) ES2048145T3 (en)
PT (1) PT85369B (en)
ZA (1) ZA874603B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8823902D0 (en) * 1988-10-12 1988-11-16 Rothmans Int Tobacco Cigarette filter rod elements & cigarettes incorporating such filter rod elements
DK499289A (en) * 1988-10-12 1990-04-13 Rothmans Int Tobacco CANDLE ELEMENTS FOR CIGARET FILTERS AND CIGARETTE EQUIPPED WITH SUCH CUSTOM ELEMENTS
US5200549A (en) * 1988-11-14 1993-04-06 Hoffman-La Roche Inc. Antipsoriatic agents
WO1990009741A1 (en) * 1989-03-02 1990-09-07 Rothmans, Benson & Hedges Inc. Uniform tar delivery profile filter
GB9307710D0 (en) * 1993-04-14 1993-06-02 Rothmans Benson & Hedges Smoking apparatus-l
US20070074733A1 (en) * 2005-10-04 2007-04-05 Philip Morris Usa Inc. Cigarettes having hollow fibers
US20080216850A1 (en) * 2007-03-09 2008-09-11 Philip Morris Usa Inc. Restrictor attachment for unfiltered smoking article
TW200911138A (en) * 2007-03-09 2009-03-16 Philip Morris Prod Smoking articles with restrictor and aerosol former
US8113215B2 (en) * 2007-06-21 2012-02-14 Philip Morris Usa Inc. Smoking article filter having liquid additive containing tubes therein
US20100059072A1 (en) * 2008-09-09 2010-03-11 Steve Woodson Ventilated smoking material perforation apparatus, method and product
US20100059075A1 (en) * 2008-09-09 2010-03-11 Steve Woodson Ventilated smoking material perforation apparatus and method
US9138016B2 (en) 2010-03-26 2015-09-22 Philip Morris Usa Inc. Smoking articles with significantly reduced gas vapor phase smoking constituents
DE102016105235B4 (en) 2016-03-21 2019-02-14 Delfortgroup Ag Improved filter paper for cigarette filters, its manufacture and filter cigarette
BR112020007198A2 (en) 2017-11-28 2020-09-29 Philip Morris Products S.A. aerosol generator article066sol with improved mouth end cavity

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490461A (en) * 1967-04-20 1970-01-20 Philip Morris Inc Cigarette ventilation
US3526904A (en) * 1968-05-10 1970-09-01 Philip Morris Inc Film covered,apertured cigarette wrapper
GB1371794A (en) * 1971-09-06 1974-10-30 British American Tobacco Co Tobacco-smoke filters
US4059121A (en) * 1973-04-20 1977-11-22 Rothmans Of Pall Mall Canada Limited Filter for tobacco smoke
US3756250A (en) * 1972-06-30 1973-09-04 D Morgenstern Filtered cigarettes
IT1065077B (en) * 1976-02-03 1985-02-25 Anic Spa FILTERING ELEMENTS PARTICULARLY FOR CIGARETTES
GB1592549A (en) * 1976-10-06 1981-07-08 British American Tobacco Co Tobacco-smoke filters
US4331166A (en) * 1980-05-02 1982-05-25 Philip Morris, Incorporated Cigarette
JPS5729147A (en) * 1980-07-30 1982-02-17 Toshiba Corp Data processing system
AU560341B2 (en) * 1981-07-06 1987-04-02 Cigarette Components Limited Ventilated cigarette filter

Also Published As

Publication number Publication date
US4809717A (en) 1989-03-07
JPH0249700B2 (en) 1990-10-31
DE3788829D1 (en) 1994-03-03
JPS6342680A (en) 1988-02-23
ES2048145T3 (en) 1994-03-16
AU579771B2 (en) 1988-12-08
PT85369B (en) 1993-07-30
DE3624661A1 (en) 1988-02-04
PT85369A (en) 1988-07-29
EP0254004A3 (en) 1990-07-11
AU7522587A (en) 1988-01-28
ZA874603B (en) 1988-01-07
EP0254004A2 (en) 1988-01-27
DE3624661C2 (en) 1992-02-20
ATE100286T1 (en) 1994-02-15

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