A filter for a cigarette comprises a porous filter rod (3) a material sheet (2) wrapped around the filter rod and a cellulose acetate thread (4) formed from substantially uncrimped cellulose acetate filaments. The cellulose acetate thread is positioned within the filter rod and extends along the central axis of the filter rod.
申请公布号
WO2009010380(A3)
申请公布日期
2009.03.19
申请号
WO2008EP58332
申请日期
2008.06.27
申请人
BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED;SAMPSON, JOHN ROGER;LEWIS, DAVID