Hydrated lime tobacco smoke filter

Abstract

A multi-sectioned filter section for reducing the content of toxic constituents contained in a stream of tobacco smoke. The multi-sectioned filter section is composed of at least one non-fibrous section and at least one fibrous plug section. The multi-sectioned filter section is adaptable for use in tobacco products such as cigarettes, cigars, cigarillos and smoking articles such as tobacco pipes and cigarette and cigar holders.

1 . A filter for removing toxic constituents from a stream of tobacco smoke produced by tobacco smoking products and tobacco smoking articles, said filter comprising at least one substrate of an inorganic material.  
     
     
         2 . The filter of  claim 1 , wherein said inorganic material is non-fibrous.  
     
     
         3 . The filter of  claim 2 , wherein said non-fibrous, inorganic material comprises hydrated lime.  
     
     
         4 . The filter of  claim 3 , wherein said hydrated lime has a surface area of about 10-85 m 2 /g.  
     
     
         5 . The filter of  claim 4 , wherein said hydrated lime has a mean particle diameter of about 1.7-10 micrometers.  
     
     
         6 . The filter of  claim 5 , wherein said hydrated lime has a pore volume of about 0.1-0.25 cc/g.  
     
     
         7 . The filter of  claim 3 , wherein said hydrated lime is in a form selected from the group consisting of granules, beads, paste and powder.  
     
     
         8 . A multi-sectioned cigarette filter comprising: 
 first and second filter sections comprising a fibrous plug material; and    a third filter section positioned between said first and second filter sections, said third filter section comprising a hydrated lime material capable of absorbing toxic constituents contained in a stream of tobacco smoke produced as a result of the tobacco smoke being drawn through said multi-sectioned filter,    wherein said first, second and third filter sections are positioned in tandem and circumscribed by a plug wrap.    
     
     
         9 . The filter of  claim 8 , wherein said fibrous plug material is any one selected from the group consisting of cellulose, cellulose acetate tow, paper, cotton, polypropylene web, polypropylene tow, polyester tow and combinations thereof.  
     
     
         10 . The filter of  claim 8 , wherein said first, second and third filter sections are circumscribed by a single plug wrap material.  
     
     
         11 . A multi-sectioned cigarette filter comprising a plurality of fibrous filter plug filter sections and a plurality of calcium hydroxide filter sections capable of absorbing toxic constituents contained in a stream of tobacco smoke.