Aerosol-generating element comprising a filter with a high content of a polyhydroxyalkanoate polymer or copolymer

Abstract

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the aerosol-generating article including: a rod of aerosol-generating substrate, the aerosol-generating substrate including at least 10 percent by weight of an aerosol former; and a filter segment formed of fibrous filtration material, the filter segment arranged in longitudinal alignment with the rod, in which the filter segment includes at least about 85 percent by weight based on a total weight of fibrous filtration material of a polyhydroxyalkanoate (PHA) polymer or copolymer, in which a resistance to draw (RTD) of the filter segment is between about 35 millimetres H2O and about 55 millimetres H2O, and in which a length of the filter segment is from about 4 millimetres to about 27 millimetres. A filter for an aerosol-generating article is also provided.

1 .- 15 . (canceled) 
     
     
         16 . An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:
 a rod of aerosol-generating substrate, the aerosol-generating substrate comprising at least 10 percent by weight of an aerosol former; and   a filter segment formed of fibrous filtration material, the filter segment arranged in longitudinal alignment with the rod,   wherein the filter segment comprises at least about 85 percent by weight based on a total weight of fibrous filtration material of a polyhydroxyalkanoate (PHA) polymer or copolymer,   wherein a resistance to draw (RTD) of the filter segment is between about 35 millimetres H 2 O and about 55 millimetres H 2 O, and   wherein a length of the filter segment is from about 4 millimetres to about 27 millimetres.   
     
     
         17 . The aerosol-generating article according to  claim 16 , wherein the filter segment further comprises at least about 90 percent by weight based on the total weight of fibrous filtration material of the polyhydroxyalkanoate (PHA) polymer or copolymer. 
     
     
         18 . The aerosol-generating article according to  claim 16 , wherein the filter segment further comprises at least about 95 percent by weight based on the total weight of fibrous filtration material of the polyhydroxyalkanoate (PHA) polymer or copolymer. 
     
     
         19 . The aerosol-generating article according to  claim 16 , wherein the filter segment further comprises at least about 5 percent by weight based on the total weight of fibrous filtration material of at least one biodegradable polymer selected from the group consisting of starch, polybutylene succinate (PBS), polybutyrate adipate terephthalate (PBAT), thermoplastic starch and thermoplastic starch blends (TPS), polycaprolactone (PCL), polyglycolide (PGA), polyvinyl alcohol (PVOH/PVA), viscose, regenerated cellulose, polysaccharides, cellulose acetate with a degree of substitution (DS) of less than 2.1, polyamides, protein-based biopolymers, chitosan-chitin based biopolymers, and combinations thereof. 
     
     
         20 . The aerosol-generating article according to  claim 19 , wherein the filter segment further comprises at least about 10 percent based on the total weight of fibrous filtration material of the at least one biodegradable polymer. 
     
     
         21 . The aerosol-generating article according to  claim 19 , wherein the filter segment further comprises less than or equal to about 15 percent by weight based on the total weight of fibrous filtration material of the at least one biodegradable polymer. 
     
     
         22 . The aerosol-generating article according to  claim 19 , wherein the at least one biodegradable polymer is one or more of PBAT, PCL, and PBS. 
     
     
         23 . The aerosol-generating article according to  claim 16 , wherein the fibrous filtration material comprises a plurality of fibres comprising a polyhydroxyalkanoate (PHA) polymer or copolymer and having a denier per filament from about 1 to about 10. 
     
     
         24 . The aerosol-generating article according to  claim 16 , wherein the fibrous filtration material comprises a plurality of fibres comprising a polyhydroxyalkanoate (PHA) polymer or copolymer and having a denier per filament from about 3.2 to about 5. 
     
     
         25 . The aerosol-generating article according to  claim 16 , wherein an RTD of the filter segment is between about 40 millimetres H 2 O and about 50 millimetres H 2 O. 
     
     
         26 . The aerosol-generating article according to  claim 16 , wherein the fibrous filtration material comprises crimped fibres comprising a polyhydroxyalkanoate (PHA) polymer or copolymer. 
     
     
         27 . The aerosol-generating article according to  claim 16 , wherein a diameter of the filter segment is from about 5 millimetres to about 12 millimetres. 
     
     
         28 . A filter for an aerosol-generating article, the filter comprising:
 a filter segment formed of fibrous filtration material, the filter segment comprising at least about 85 percent by weight based on a total weight of fibrous filtration material of fibres comprising a polyhydroxyalkanoate (PHA) polymer or copolymer,   wherein a resistance to draw (RTD) of the filter segment is between about 35 millimetres H 2 O and about 55 millimetres H 2 O, and   wherein a length of the filter segment is from about 4 millimetres to about 27 millimetres.