摘要:
A smoking article has a pressure drop across it which is in the range 250-700 mmWG at 17.5 cm³s⁻¹. The purpose is to minimize the volume of smoke drawable by smokers per puff. The pressure drop may be achieved by an essentially impervious portion (4) of a filter (3) and/or by such a portion in the tobacco rod (2).
摘要:
A smoking article comprising a rod of smoking material (1) and a filter portion, said filter portion including means (6) for collecting particulate matter in the smoke from the rod of smoking material in a collection zone (7), and means (3) for heating said collection zone to release the semivolatile compounds whilst allowing the involatiles to be retained in the filter.