Tobacco Smoking Filter or Filter Element with a Content of Adjuncts

Abstract

A tobacco smoking filter is disclosed, with adjunets on the surface in the form of fibres filaments or films and whereby the drawing resistance of the tobacco smoking filter and the mass of the adjuncts in the tobacco smoking filter meet the following equation (I) M ad /Δp>1 mg/daPA (I), where Δp is the drawing resistance [daPA], applied as a value calculated with a 7.8 mm filter diameter and M ad [mg] is the mass of the adjuncts. The tobacco smoking filter comprises channel structures and the filer material is provided as a planar material. Said tobacco smoking filter has a low draw resistance on smoking with a particularly good filtration effect and is relatively simple to produce.

1 . Tobacco smoke filters or filter elements, which are constructed in one piece and contain fibrous filaments or films based on polymers or polymer mixtures, which can be spun or processed into films and contain one or more additives, wherein
 a) the additives are present at the surface of the fibers, the filaments or the films,   b) the resistance of the tobacco smoke filter to the passage of air and the mass of the additives in the tobacco smoke filter observe the following equation (I):
     M   ad   /ΔP> 1 mg/daPA   (I), 
   in which ΔP 7.8  is the resistance to the passage of air (daPA), which is used as a value calculated on the basis of a 7.8 mm filter diameter, Ma d (mg) is the mass of the additives, and   c) the tobacco smoke filter has a channel structure and d) the filter material is present as a two-dimensional formation.   
   
   
       2 . The tobacco smoke filter of according to  claim 1 , wherein the filter material is a two-dimensional formation of fibers or filaments or folded film, the two-dimensional formation and/or the film being smooth, folded, embossed and/or partially consolidated. 
   
   
       3 . The tobacco smoke filter according to  claims 1 , wherein the filter material is built up from a cellulose ester. 
   
   
       4 . The tobacco smoke filter according to  claim 3 , wherein the cellulose ester is cellulose acetate, cellulose butyrate, cellulose acetobutyrate, cellulose acetopropionate and/or cellulose propionate. 
   
   
       5 . The tobacco smoke filter according to  claim 4 , wherein the cellulose acetate has a degree of substitution of approximately 1.5 and 3.0 and especially of 2.2 to 2.6. 
   
   
       6 . The tobacco smoke filter according to  claim 1 , wherein the ratio of M ad /ΔP is more than 2 mg/daPa and especially more than 3 mg/daPa. 
   
   
       7 . The tobacco smoke filter according to  claims 1 , wherein the additives, on the surface of the fibers, filaments or films are particulate, and, in particular, have a particle size of less than 300 μm. 
   
   
       8 . The tobacco smoke filter according to  claim 7 , wherein the particle size of the additives is less than 100 μm and especially less than 50 μm and particularly less than 30 μm. 
   
   
       9 . The tobacco smoke filter according to  claims 7 , wherein the particulate additives are porous additives, especially in the form of an absorbent based on activated charcoal, metal oxides, metal hydroxides and/or metal oxide hydrates. 
   
   
       10 . The tobacco smoke filter according to  claim 9 , wherein the metal oxides, hydroxides and/or metal oxide hydrates are those of aluminum, silicon, titanium and/or magnesium. 
   
   
       11 . The tobacco smoke filter according to  claims 9 , wherein the porous additive is treated with active substances, especially in the form of antioxidants, flavors and/or antimutagenic substances. 
   
   
       12 . The tobacco smoke filter according to  claims 1 , wherein the additive, on the surface of the fibers, filaments and films, is a filtration aid, especially in the form of organic acids, acidic carboxylic esters of polyphenol and/or porphyrin derivatives. 
   
   
       13 . The tobacco smoke filter according to  claims 1 , wherein the particulate additives are fixed on the surface of the filter material by means of a binder, especially with polyvinyl acetate, polyvinyl alcohol, polyethylene glycol, water soluble esters or ethers, starch, starch derivatives and/or cellulose esters, especially cellulose acetate with an average degree of acetylation of 0.3 to 1. 
   
   
       14 . The tobacco smoke filter according to  claims 1 , wherein the fibers, filaments or films of the film material contain further additives in their interior to improve the properties. 
   
   
       15 . The tobacco smoke filter according to  claim 14 , wherein the further additives are plasticizers, marking agents, pigments and/or stabilizers. 
   
   
       16 . The tobacco smoke filter according to  claim 15 , wherein the plasticizer within the fibers or filaments or films is present in an amount of 5 to 15% by weight. 
   
   
       17 . The tobacco smoke filter of according to  claims 15 , wherein the plasticizer is present in the form of triacetin, ethylene glycol diacetate and/or diethyl citrate. 
   
   
       18 . The tobacco smoke filter according to  claim 1 , wherein the fiber weight (or filament weight/resistance to the passage of air ratio S, related to the filament funnel, is larger than about 0.7, the S value being calculated from the formula
     S =( m   A   /ΔP   7.8 )/dpf [10 m/daPA]  (II)   
     in which m A  is the fiber weight (g), ΔP (daPA) is the resistance to the passage of air and dpf is the titer of the filament (dtex) and, for the resistance to the passage of air, the value, calculated for a filter diameter of 7.8 mm, is used, and the hardness of the cigarette filter exceeds approximately 90 filtrona hardness. 
   
   
       19 . The tobacco smoke filter according to  claim 18 , wherein the fiber weight does not exceed 10 mg/mm of filter length and/or the residual crimping of the filter material does not exceed the value of 1.45, Formula (III) applying here:
 I r =10,000×m A /(G×I) (III), in which m A  is the fiber weight (g), G is the total titer (g/10 exp 4×m) and I is the filter length (mm).   
   
   
       20 . The tobacco smoke filter according to  claim 19 , wherein the residual crimping is between 1.05 and 1.4 and especially between 1.1 and 1.3. 
   
   
       21 . The tobacco smoke filter of according to  claims 18 , wherein the fiber weight (or filament weight)/resistance to the passage of air ratio S, related to the filament titer, does not exceed a value of about 2 and, in particular, has a value between 0.8 and 1.3. 
   
   
       22 . The tobacco smoke filter according to  claim 18 , wherein the fiber weight (or filament weight) is at least 4 mg/mm of filter length and especially between 5 and 8 mg/mm of filter length. 
   
   
       23 . The tobacco smoke filter according to  claim 18 , wherein the filtrona hardness is between about 90 and 95 and particularly between 91 and 93. 
   
   
       24 . The tobacco smoke filter according to  claim 1 , wherein the filter contains a photoreactive additive, especially in the form of finely divided titanium oxide of the anatase type having an average particle size of less than 2 μm.