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
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/34—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a carbocyclic ring other than a six-membered aromatic ring
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/36—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring
  • A24B15/38—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances containing a heterocyclic ring having only nitrogen as hetero atom

Definitions

• the invention relates to a ventilated filter cigarette according to the preamble main claim.
• Such filter cigarettes with a triple filter or three-chamber filter which is also referred to as a three-component filter
• DE-OS 3 635 958 which is primarily a filter with two filter elements, namely one discloses essentially air-impermeable filter element with a large pressure drop and a second air-permeable filter element with a relatively low pressure drop.
• the possibility is also discussed of arranging the two filter elements at a distance from one another and an adsorbent such as activated carbon in the intermediate space to reduce the vapor phase components.
• the total smoke of a commercially available, medium-strength filter cigarette is made up of about 5-10% by weight of a particle phase and about 90-95% by weight of a gas phase, of which about 2-5% by weight are biologically or taste-relevant.
• the aim is to reduce smoke in the gas phase with less organically volatile gas phase components, so that the use of adsorbents such as activated carbon would be advantageous in principle if these adsorbents did not change the taste of the cigarette smoke in an undesirable direction.
• the invention has set itself the task of proposing a filter cigarette which, while maintaining a qualitatively and quantitatively good range of flavors, a disproportionately high gas phase reduction with a condensate and Nicotine reduction enables, and in the so far usual and perceived by consumers as annoying secondary taste or so-called "coal taste” is suppressed or completely prevented.
• the flavoring of the tobacco rod with flavorings may be known per se, but according to the invention, a mixture of flavorings from two groups, namely one or more compounds of flavorings, is proposed for the ventilated filter cigarette with a triple filter or a three-chamber filter Group A according to the general formula in which R1 to R4 are the same or different and are H, CH3, CH3 - CH2, OH, butyric acid or propionic acid or CH3-O.
• Group B consists of one or more compounds of the general formula in which R1 to R4 are the same or different and are H, CH3, CH3 - CH2 or a cyclic hydrocarbon radical, R1 with R2 or R3 with R4 can form a benzene nucleus, consists.
• R1 to R4 are the same or different and are H, CH3, CH3 - CH2 or a cyclic hydrocarbon radical, R1 with R2 or R3 with R4 can form a benzene nucleus, consists.
• Preferred compounds of the flavorings according to group B are the pyrazines containing more than two methyl groups.
• flavorings namely additionally as a third component, those of group C in amounts up to 200 ppm, namely compounds of the general formula, can preferably be used in which R1 and R2 are the same or different and are H, CH3 or CH3 - CH2.
• This impregnation of the tobacco rod with the aroma mixture from group A and group B and preferably additionally from group C is related to the adsorbents, which are arranged in a central chamber between two filter elements. These adsorbents should fill at least 70 to 95% by volume of the middle chamber. Furthermore, at least 80 vol .-% of this adsorbent from activated carbon with a pore volume of 0.7 to 0.8 cm3 / g and a predominant pore radius of 0.9 to 1.0 nm and a grain size distribution corresponding to the mesh size of 177 microns to 500 ⁇ m (according to ASTM sieves no. 35 and no. 80 or the corresponding ISO sieves).
• the middle chamber is not completely filled with adsorbent, the secondary air, together with the formation of the first strand-side filter element and the perforation, brings about better contact of the mainstream smoke with the adsorbent, with the corresponding selection of the components of the mixture of flavoring substances in contrast to other more biologically relevant components are less retained in the gas phase.
• the adsorbent in the middle chamber not only with that from the first filter element the main smoke stream escaping almost linearly comes into contact, but is additionally whirled through with or from the ventilation air, which is achieved in that the air-impermeable covering by preferably continuous perforations - or online laser perforations - ventilation in the area of the middle chamber and / or previously in enables a downstream portion of the first strand-side filter component or filter chamber.
• Ventilation downstream of the first strand-side filter chamber is known per se. Because the ventilation takes place in the area of the middle chamber filled with adsorbents, in addition to a dilution of the main flow smoke, better turbulence and thus better contact of the main flow smoke with the adsorbent is achieved. If, alternatively or additionally, ventilation is also made possible in a downstream section of the first strand-side chamber, the gas phase comes into even better contact with the adsorbent.
• the perforation which is usually done online by laser beams, should be such that the degree of filter ventilation is 30 to 80%.
• the first strand-side chamber contains a filter material with high tensile resistance, which essentially only allows passage of the main flow smoke in the longitudinal direction and does not allow radial distribution of the main flow smoke in this first filter element, the main flow smoke emerges from this first filter component initially in a laminar manner, then induced by ventilation air relatively swirling into the middle chamber partially filled with sorbents and increases the adsorption of the gas phase.
• the perforation occurs in a downstream portion of the first strand-side filter component, which, for example, accounts for half or a third of the filter length, this is not due to the high tensile resistance and the lamella-like configuration reckon that the secondary air entering through the perforations in this section is still accompanied by considerable amounts of mainstream smoke into the chamber.
• the first filter element has a relatively high tensile resistance of 0.8 to 1.6 kPa and, due to its preferred material design and configuration, shows a low tar retention.
• the third filter element located downstream of the middle chamber with the adsorbent has a much lower tensile resistance of 0.2 to 0.4 kPa and preferably consists of conventional filter material such as cellulose acetate.
• the filter material in the first strand-side chamber which is said to bring about a high tensile resistance and a lower tar retention, can consist of paper films, cellulose or cellulose derivative films cut lengthwise, cut in strips, flowed through or rolled in the longitudinal direction, or arranged in zigzag layers and flowed lengthways.
• swellable films are used, namely those made of gelatin, carboxymethyl cellulose, carboxymethylated starch or polyoxymethacrylates, it also being possible to use non-swellable carrier films which are coated with a swellable material.
• the films which are strongly swellable with water or made swellable by coating Films have the advantage that even small amounts of condensed moisture, which can be up to 10 mg H2O per cigarette according to DIN 10240, increase the draft resistance in the course of smoking the cigarette, which not only compensates for the gradually decreasing draft resistance of the tobacco rod , but also an increased ventilation is made possible by increasing the tensile resistance before the perforations in the downstream ventilated partial area of the first strand-side filter component or in the ventilated middle chamber. Designed accordingly, this leads to an approximately constant gas and particle phase supply per train.
• the first strand-side filter element already ensures a high tensile resistance due to the material or the geometrical arrangement and thus favors ventilation in the downstream portion of this first strand-side filter element, in that the "channels" or “gaps" in the peripheral region of the filter preferably with ventilation air are supplied, it is also possible to provide specially embossed channels in the peripheral part of this section, which are closed upstream, so that no main current smoke can penetrate.
• the third filter component on the mouth side consists of a conventional filter element with low tensile resistance, which results in a laminar flow with low retention.
• This mouth-side chamber preferably contains conventional, air-permeable cellulose acetate fiber cable.
• filter components Some of which are machine-made, and which are described in more detail below, were assembled by hand to form a three-chamber filter according to the invention, the term "chamber" generally being used in the sense of a filter section.
• the degree of ventilation or air intake of the filter cigarettes produced in this way was 55%, the final pull resistance relevant to consumers resulting from this and the listed individual pulling resistances was 0.95 kPa.
• Example 1 Three-chamber filter cigarettes according to Example 1 were smoked in addition to machine-made reference cigarettes (mono filter cigarettes without activated carbon, but with the same tobacco mixture) in accordance with DIN 10240.
• the CO content was determined according to DIN draft 10248, the NO content according to the chemiluminescence method common in the cigarette industry.
• the data of the experimental cigarette show a dry condensate content of 6.6 mg, which is assigned to the "light" range.
• the usual CO value of about 7 ml in conventional cigarettes of this class or this condensate content (see comparison) is well below 4.5 ml and, like the NO value, belongs more to the "ultra-light" range, which is due to indicates a disproportionate gas phase reduction.
• the gas phase reduction of the test cigarette determined by the internal method was on average about 65% compared to the comparison cigarette for 18 representative substances.
• the cigarettes are smoked according to DIN 10240 on an RM 20 (from Borgwaldt).
• the particle phase is separated by means of an electrostatic smoke trap; the gas phase is collected in a glass cylinder.
• the separation into individual substances is carried out by gas chromatography using a separating capillary 60 m ⁇ 0.32 mm inside diameter, coated with 0.5 ⁇ DB-Wax (J & W, gas chromatograph 4160 from Carlo Erba).
• Three-chamber filter cigarettes according to Example 1 the strands of which, however, were provided with the flavoring substances according to the invention (150 ppm flavor class A; 15 ppm flavor class B; 10 ppm flavor class C), were smoke analysis as in example 1, in addition to the same reference cigarettes and sensory checked.
• the analytical-physical data were as expected as in Example 1.
• the sensory evaluation was carried out by the same team of experts. Finding: The experimental cigarettes were judged to be full, tobacco-like and aromatic with other equivalence to the reference cigarettes. An "off button / off flavor" effect was not found. (9 matching, 1 different smoking judgment).
• Three-chamber filter cigarettes according to the invention were produced in accordance with Example 1a, but, in deviation from this, contained 100 mg of activated carbon 30-70 mesh in the middle chamber, and whose filter section on the strand side consisted of starch film arranged in a zigzag layer.
• the gas phase reduction compared to the comparison cigarette for 18 representative substances averaged about 85%, e.g. 79% for acetaldehyde, 87% for HCN, 90% for acrolein.

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)
• Fats And Perfumes (AREA)
• Manufacture Of Tobacco Products (AREA)

Applications Claiming Priority (2)

Publications (3)

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ID=6425607

Family Applications (1)

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• 1991
  • 1991-02-19 DE DE4105500A patent/DE4105500C1/de not_active Expired - Fee Related
• 1992
  • 1992-02-14 EP EP92102466A patent/EP0499974B1/de not_active Expired - Lifetime
  • 1992-02-14 DE DE59200817T patent/DE59200817D1/de not_active Expired - Fee Related
  • 1992-02-19 JP JP4032370A patent/JP2647298B2/ja not_active Expired - Lifetime

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