Item for smoking

Abstract

The invention relates to a ventilated filter cigarette with a wrapped one-part tobacco strand ( 11 ) and with a filter ( 20 ) having a ventilation means, said filter consisting of at least two filter parts ( 22,23 ). ventilation holes ( 14 ) are provided in the area of the mouth side filter part ( 22 ). Moreover, the mouth side filter part ( 22 ) is formed of a one-part filter segment, whereas the strand side filter part ( 23 ) is a filter segment ( 23 ) with a core ( 24 ) and a sleeve ( 26 ), and thus forms a so-called coaxial filter part or a coaxial filter.

1 . 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 . Ventilated 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 . Ventilated filter 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 . Ventilated filter cigarette according to  claim 2  or  3 , characterized in that the filter material contains an additive.  
     
     
         5 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter 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 . Ventilated filter cigarette according to  claim 1 , characterized in that the reduction of gas phase components achieved through ventilation is between 10 and 90%.  
     
     
         14 . Ventilated filter cigarette according to  claim 13 , characterized in that the reduction of the gas phase components achieved through ventilation is between 10 and 50%.  
     
     
         15 . Ventilated filter 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.