Cellulose acetate tow band for use in cigarette filter, cigarette filter, apparatus for manufacturing tow band, and method of manufacturing tow band

Abstract

A cellulose acetate tow band for use in a cigarette filter, in which a filament denier is not less than 5.0 denier, a Feret area of a filament is not less than 0.5, and/or a ratio S/L of a cross-sectional area S of the filament to a cross-sectional peripheral length L of the filament is not less than 5. The filament denier may be not more than 10 denier. The Feret area may be not more than 0.9. The ratio S/L may be not more than 9. In an apparatus for or a method of manufacturing a tow band, round-shaped spinning holes ( 10 ) each with a diameter of not less than 50 μm are used. The diameter of each round-shaped spinning hole ( 10 ) may be not more than 100 μm.

1 . A cellulose acetate tow band for use in a cigarette filter, in which a plurality of filaments extruded from a plurality of respective spinning holes are bundled together and crimped, wherein
 a filament denier is not less than 5.0 denier, and   a Feret area of each of the filaments is not less than 0.5.   
     
     
         2 . The cellulose acetate tow band for use in a cigarette filter according to  claim 1 , wherein
 the filament denier is not more than 10 denier.   
     
     
         3 . The cellulose acetate tow band for use in a cigarette filter according to  claim 1 , wherein
 the Feret area is not more than 0.9.   
     
     
         4 . The cellulose acetate tow band for use in a cigarette filter according to  claim 1 , wherein
 a total denier is not less than 14,000 denier.   
     
     
         5 . The cellulose acetate tow band for use in a cigarette filter according to  claim 4 , wherein
 the total denier is not more than 22,000 denier.   
     
     
         6 . A cellulose acetate tow band for use in a cigarette filter, in which a plurality of filaments extruded from a plurality of respective spinning holes are bundled together and crimped, wherein
 a filament denier is not less than 5.0 denier, and   in a case where an area of a cross section of each of the filaments is S and a peripheral length of the cross section is L, a ratio S/L of the area to the peripheral length is not less than 5.   
     
     
         7 . The cellulose acetate tow band for use in a cigarette filter according to  claim 6 , wherein
 the filament denier is not more than 10 denier, and   the ratio S/L is not more than 9.   
     
     
         8 . A cigarette filter manufactured from a cellulose acetate tow band, the cellulose acetate tow band comprising a plurality of filaments extruded from a plurality of respective spinning holes, the filaments being bundled together and crimped, wherein
 a filament denier of the cellulose acetate tow band is not less than 5.0 denier,   a Feret area of each of the filaments is not less than 0.5, and   the cigarette filter has a circumferential length of 14 to 18 mm.   
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . (canceled)