The invention relates to a combined filter for removing tars and toxic compounds from tobacco smoke, which is applied to any type of tobacco rod, comprising a primary membrane (M1) located at the end of the tobacco rod, made up of at least one disc of impervious material and perforated with at least one hole that extends through same in a direction perpendicular to the cross-section of the membrane, so that the perforated surface has a free flow area of 0.2 % to 30 % of the total cross-section of the membrane; an outer membrane (M3) located at the end in contact with the smoker and made up of a cellulose-acetate fibre; which can include a cylindrical intermediate membrane (M2) formed by an adsorbent material between the primary membrane (M1) and the outer membrane (M3).
本发明涉及一种用于去除烟草烟雾中焦油和有毒化合物的组合式过滤器,它适用于任何类型的烟草棒,包括位于烟草棒末端的主膜(M1),由至少一个不透
水材料圆盘构成,并在垂直于膜横截面的方向上穿有至少一个孔,使穿孔表面的自由流动面积为膜总横截面的 0.外膜 (M3) 位于与烟熏炉接触的一端,由
醋酸纤维素纤维构成;其中可包括由吸附材料在主膜 (M1) 和外膜 (M3) 之间形成的圆柱形中间膜 (M2)。