Segment for a smoking article comprising a calendered fiber web

Abstract

The invention relates to a segment for a smoking article which comprises a wrapping material and a filter material, wherein the wrapping material wraps the filter material and at least 10% and at most 100% of the mass of the filter material is formed by a calendered fibre web, wherein at least 50% and at most 100% of the mass of the calendered fibre web is formed by organic polymer fibres. The calendered fibre web has a compression factor C of at least 0.45 and at most 0.85.

The invention claimed is: 
     
         1 . Segment for a smoking article, which comprises a wrapper material and a filter material, wherein the wrapper material wraps the filter material and at least 10% and at most 100% of the mass of the filter material is formed by a calendered fibrous web, wherein at least 50% and at most 100% of the mass of the calendered fibrous web is formed by organic polymer fibers, and wherein the calendered fibrous web has a compression factor C of at least 0.45 and at most 0.85, wherein the compression factor is calculated by 
       
         
           
             
               C 
               = 
               
                 
                   1 
                   d 
                 
                 ⁢ 
                 
                   
                     ∑ 
                     
                       i 
                       = 
                       1 
                     
                     N 
                   
                     
                   
                     
                       
                         m 
                         i 
                       
                       
                         ρ 
                         i 
                       
                     
                     . 
                   
                 
               
             
           
         
         wherein d is the thickness of the calendered fibrous web determined in accordance with ISO 534:2011, m i , 
         with 1≤i≤N, is the mass per unit area of the i-th of N≥1 components of the calendered fibrous web, 
         and ρ i , with 1≤i≤N, is the density of the i-th of the N≥1 components, 
         wherein the N components considered for the calculation of the compression factor C are selected such that the sum of the masses per unit area m i  from i=1 to i=N is at least 90% of the basis weight of the calendered fibrous web determined in accordance with ISO 536:2019. 
       
     
     
         2 . Segment according to  claim 1 , in which at least 20% and at most 90% of the mass of the filter material is formed by the calendered fibrous web. 
     
     
         3 . Segment according to  claim 1 , in which the compression factor of the calendered fibrous web is at least 0.55 and at most 0.75. 
     
     
         4 . Segment according to  claim 1 , in which at least 90% by weight of the organic polymer fibers are pulp fibers, fibers from regenerated cellulose or fibers from cellulose acetate. 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . Segment according to  claim 1 , in which the proportion of organic polymer fibers with respect to the mass of the calendered fibrous web is at least 70% and at most 95%. 
     
     
         8 . Segment according to  claim 1 , in which the calendered fibrous web contains less than 20% fibers from cellulose acetate each with respect to the mass of the calendered fibrous web. 
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . Segment according to  claim 1 , in which at least 1% and at most 9% of the mass of the calendered fibrous web is formed by one or more additives selected from the group consisting of sizing agents, alkylketene dimers (AKD), alkenyl succinic acid anhydrides (ASA), fatty acids, starch, starch derivatives, carboxy methyl cellulose, alginates, chitosan, wet strength agents, citrates, trisodium citrate, tripotassium citrate, malates, tartrates, acetates, nitrates, succinates, fumarates, gluconates, glycolates, lactates, oxalates, salicylates, α-hydroxy caprylates, phosphates, polyphosphates, chlorides, hydrogen carbonates, triacetin, propylene glycol, ethylene glycol, sorbitol, glycerol, polyethylene glycol, polypropylene glycol, polyvinyl alcohol, triethyl citrate, catalysts, activated carbon, flavors and encapsulated flavors. 
     
     
         12 . Segment according to  claim 1 , in which the basis weight of the calendered fibrous web is at least 23 g/m 2  and at most 38 g/m 2 . 
     
     
         13 . Segment according to  claim 1 , in which the thickness of the calendered fibrous web is at least 20 μm and at most 50 μm. 
     
     
         14 . Segment according to  claim 1 , in which the tensile strength with respect to width of the calendered fibrous web, measured in accordance with ISO 1924-2:2008, in at least one direction is at least 8 N/15 mm and at most 60 N/15 mm. 
     
     
         15 . Segment according to  claim 1 , in which the elongation at break of the calendered fibrous web, measured in accordance with ISO 1924-2:2008, in at least one direction is at least 0.8% and at most 3.0%. 
     
     
         16 . Segment according to  claim 1 , in which the calendered fibrous web is coated on at least one side, wherein the coating on at least one side covers at least 20% and at most 100% of the surface area of this side of the calendered fibrous web, and the coating material comprises a material selected from the group consisting of sizing agents, alkylketene dimers (AKD), alkenyl succinic acid anhydrides (ASA), fatty acids, starch, starch derivatives, carboxy methyl cellulose, alginates, chitosan, wet strength agents, citrates, trisodium citrate, tripotassium citrate, malates, tartrates, acetates, nitrates, succinates, fumarates, gluconates, glycolates, lactates, oxalates, salicylates, α-hydroxy caprylates, phosphates, polyphosphates, chlorides, hydrogen carbonates, triacetin, propylene glycol, ethylene glycol, sorbitol, glycerol, polyethylene glycol, polypropylene glycol, polyvinyl alcohol, triethyl citrate, catalysts, activated carbon, flavors and encapsulated flavors or comprises a mixture of two or more of these materials. 
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . (canceled) 
     
     
         20 . Segment according to  claim 16 , in which the amount of coating material that is applied to one or both sides of the calendered fibrous web is at least 0.5 g/m 2  and at most 5.0 g/m 2  wherein the amount in g/m 2  is with respect to the surface area to which the coating material is actually applied. 
     
     
         21 . Segment according to  claim 16 , in which the calendered fibrous web is coated on at least one side, wherein the coating covers on at least one side at least 20% and at most 100% of the area of this side of the calendered fibrous web, and the basis weight of the calendered fibrous web including the coating is at least 20 g/m 2  and at most 35 g/m 2 , wherein the coating comprises a material that is selected from the group consisting of starch, starch derivatives, cellulose derivatives and mixtures of two or more thereof. 
     
     
         22 . Segment according to  claim 1 , in which the calendered fibrous web is a calendered paper or a calendered nonwoven. 
     
     
         23 . Segment according to  claim 1 , in which the filter material comprises the calendered fibrous web and a further filtration material, wherein the further filtration material is preferably selected from the group consisting of filter papers, cellulose-based nonwovens, hydroentangled nonwovens, tows comprising cellulose acetate, tows comprising regenerated cellulose and combination of two or more thereof. 
     
     
         24 . (canceled) 
     
     
         25 . Segment according to  claim 23 , in which the further filtration material is a filter paper, a cellulose-based nonwoven, a hydroentangled nonwoven or a combination of two or more thereof, wherein the further material is web-shaped and is laminated to the calendered fibrous web. 
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . Segment according to  claim 1 , in which the wrapper material is a paper or a film. 
     
     
         29 . (canceled) 
     
     
         30 . Segment according to  claim 1 , wherein the segment is cylindrical with an approximately circular or oval outer boundary of the cross sectional surface and has a nominal diameter of at least 5 mm and at most 8 mm. 
     
     
         31 . Segment according to  claim 1 , wherein the segment has a length of at least 4 mm and at most 40 mm. 
     
     
         32 . Segment according to  claim 1 , for which the draw resistance per unit length of the segment is at least 0.05 mmWG/mm and at most 12.0 mmWG/mm. 
     
     
         33 . (canceled) 
     
     
         34 . (canceled) 
     
     
         35 . Filter rod, wherein the filter rod is cylindrical with an approximately circular or oval outer boundary of the cross sectional surface, has a length of at least 40 mm and at most 200 mm and comprises at least one segment according to  claim 1 . 
     
     
         36 . Filter rod according to  claim 35 , which comprises at least one segment according to one of claims  1  to  34  and at least one further segment with a filter material, wherein the segments are arranged one after the other in the longitudinal direction of the filter rod, and wherein the filter material of the further segment preferably-comprises cellulose acetate. 
     
     
         37 . (canceled) 
     
     
         38 . (canceled) 
     
     
         39 . Smoking article which comprises at least two segments, wherein one of the segments is a segment according to  claim 1  and at least one of the segments contains an aerosol-forming material. 
     
     
         40 . Smoking article according to  claim 39 , which comprises at least three segments, wherein a first segment contains an aerosol-forming material, a second segment is a segment according to  claim 1 , and a third segment is provided, wherein the third segment in particular-serves for filtration, and wherein the second segment is arranged between the first and the third segment. 
     
     
         41 . Smoking article according to  claim 40 , in which the draw resistance of the third segment is higher than that of the second segment. 
     
     
         42 . Smoking article according to  claim 40 , in which the ratio of the length of the second segment to the length of the third segment is at least 1:2 and at most 5:1. 
     
     
         43 . (canceled) 
     
     
         44 . Smoking article according to  claim 39 , wherein the smoking article is a filter cigarette and the aerosol-forming material is tobacco. 
     
     
         45 . Smoking article according to  claim 39 , wherein the aerosol-forming material is only heated but not burned during the intended use of the smoking article and the aerosol-forming material comprises a material that is selected from the group consisting of tobacco, reconstituted tobacco, nicotine, glycerol, propylene glycol, and flavors or a mixture of two or more of these materials. 
     
     
         46 . Smoking article according to  claim 45 , wherein the aerosol-forming material is heated electrically during the intended use and wherein the aerosol-forming material is present as a gel or in liquid form.