| 摘要 |
1. Ventilated filter cigarette with wrapped tobacco strand and with a filter (20) having ventilation means, said filter consisting of at least two filter parts (22, 23) wherein - the ventilation means is provided in the area of the mouth side filter part (22); and - the mouth side filter part (22) is at least a one-part filter part and the tobacco strand side filter part (23) is a coaxial filter part with a core (24) and a sleeve (26); characterized in that - the tobacco strand (11) is a one-part strand; and that - the pressure drop of the core (24) is smaller than the pressure drop of the sleeve (26). 2. Cigarette according to claim 1, characterized in that the mouth side filter part (22) consists of flat-shaped, fibrous or granular or degradable filter material. 3. Cigarette according to claim 2, characterized in that the filter material is cellulose, cellulose ester, preferably cellulose acetate, melt-blown filter material, air-laid filter material, filter material with additives, tobacco, other easily degradable filter materials or thermoplastic filter fibres. 4. Cigarette according to claim 2 or 3, characterized in that the filter material contains an additive. 5. Cigarette according to claim 4, characterized in that aromatic substances, acids or bases in suspension or solution, or selectively effective adsorbents such as activated carbon or SiO2 are used as additives. 6. Cigarette according to one of claims 1 to 5, characterized in that the core (24) of the strand side coaxial filter part (23) consists of fibre material having a low fineness, whereby the value for a single fibre is in the range from 3.0 to 8.0 den and the overall fineness being in the range from 15,000 to 50,000 den. 7. Cigarette according to claim 6, characterized in that the single fibre fineness is at 6.0 den and the overall fineness at 17,000 den. 8. Cigarette according to one of claims 1 to 5, characterized in that the sleeve (26) of the tobacco side coaxial filter part (23) from fibre material with a single fibre fineness is in the range of 1.5 to 3.0 den and the overall fineness is in the range of 40,000 to 75,000 den. 9. Cigarette according to claim 8, characterized in that the single fibre fineness is at 2.1 den., and the overall fineness is at 55,000 den. 10. Cigarette according to claim 1, characterized in that the ratio of the pressure drop of the core (24) to the sleeve (26) is greater than 2. 11. Cigarette according to claim 10, characterized in that the ratio of the pressure drop of the core (24) to the sleeve (26) is around 6. 12. Cigarette according to claim 1, characterized in that the surface of the core (34) is wrapped in a way impermeable to air or is made up in a way impermeable to air. 13. Cigarette according to claim 1, characterized in that the reduction of gas phase components achieved through ventilation is between 10 and 90%. 14. Cigarette according to claim 13, characterized in that the reduction of the gas phase components achieved through ventilation is between 10 and 50%. 15. Cigarette according to claim 1, characterized in that the ventilation means extend beyond the mouth side part into the strand side filter part, whereby the ventilation air is diverted into the mouth side part.
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