Cigarette filter capable of removing harmful substance

Abstract

[PROBLEMS] To provide a cigarette filter that does not impair the distinctive flavor of a cigarette and the air permeability of filter while smoking, and at the same time, can more effectively remove harmful substances such as a pyrene that is generated from the cigarette. [MEANS FOR SOLVING PROBLEMS] The cigarette filter comprising a filter fiber bundle body which cigarette smoke passes through; a fine powder with a high surface area ratio that are mixed and scattered in the filter fiber bundle body; and a double-stranded DNA molecule attached to the outer surface of the fine powder with a high surface area ratio, characterized in that harmful substances such as benzo[a]pyrene contained in the cigarette smoke can be removed by intercalation into the double-stranded DNA molecule.

1 . A cigarette filer comprising:
 a filter fiber bundle through which smoke of a cigarette passes;   cellulose beads mixed into the filter fiber bundle to be scattered therein, and   double-stranded DNA molecules adhered to an outer surface of the cellulose beads, wherein   harmful substances such as benzo[a]pyrene contained in the smoke of the cigarette are trapped by intercalation with the double-stranded DNA molecules so as to be removed.   
   
   
       2 . The cigarette filter according to  claim 1 , wherein mean particle size of the cellulose beads is in a range from 50 to 2000 μm. 
   
   
       3 . The cigarette filter according to  claim 1 , wherein a mean particle size of the cellulose beads is in a range from 300 to 800 μm. 
   
   
       4 . The cigarette filter according to  claim 1 , wherein the cellulose beads are present in a range from 1 to 50% by weight and the double-stranded DNA molecules are present in a range from 0.01 to 10% by weight based on the weight of the filter fiber bundle. 
   
   
       5 . The cigarette filter according to  claim 1 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       6 . A paper wrapped cigarette provided with the cigarette filter according to  claim 4 . 
   
   
       7 . The cigarette filter according to  claim 2 , wherein the cellulose beads are present in a range from 1 to 50% by weight and the double-stranded DNA molecules are present in a range from 0.01 to 10% by weight based on the weight of the filter fiber bundle. 
   
   
       8 . The cigarette filter according to  claim 3 , wherein the cellulose beads are present in a range from 1 to 50% by weight and the double-stranded DNA molecules are present in a range from 0.01 to 10% by weight based on the weight of the filter fiber bundle. 
   
   
       9 . The cigarette filter according to  claim 2 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       10 . The cigarette filter according to  claim 3 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       11 . The cigarette filter according to  claim 4 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       12 . The cigarette filter according to  claim 7 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       13 . The cigarette filter according to  claim 8 , wherein the filter fiber bundle is a filter fiber bundle formed of cellulose acetate. 
   
   
       14 . A paper wrapped cigarette provided with the cigarette filter according to  claim 7 . 
   
   
       15 . A paper wrapped cigarette provided with the cigarette filter according to  claim 8 . 
   
   
       16 . A paper wrapped cigarette provided with the cigarette filter according to  claim 5 . 
   
   
       17 . A paper wrapped cigarette provided with the cigarette filter according to  claim 9 . 
   
   
       18 . A paper wrapped cigarette provided with the cigarette filter according to  claim 10 . 
   
   
       19 . A paper wrapped cigarette provided with the cigarette filter according to  claim 11 . 
   
   
       20 . A paper wrapped cigarette provided with the cigarette filter according to  claim 12 . 
   
   
       21 . A paper wrapped cigarette provided with the cigarette filter according to  claim 13 .