| 摘要 |
A filter for a smoking article comprises elongate body of filter material for filtering smoke, an inner wrapper comprising first and second regions of non-porous material around and spaced apart along the length the filter material to define a gap that acts as a ventilation zone, and an outer wrapper of porous material overlying the inner wrapper such as to allow ventilation air to be drawn through the ventilation zone and pass into the filter material (a) through the porous third wrapper and (b) longitudinally between inner wrapper and the outer wrapper. A smoking article comprises a rod of smoking material connected to a filter. A method for producing a smoking article includes wrapping of an elongate body of filter material by an inner wrapper; wrapping the filter material by the outer wrapper located above the inner wrapper and connection of the outer wrapper to the inner one. |
