Plougmann Vingtoft A / S, Rued Langgaards Vej 8, 2300 Copenhagen S, Denmark

摘要

A multilayer combustible heat source (2, 8) for a smoking article comprises: a combustible first layer (4, 10) comprising carbon; and a second layer (6, 12) in direct contact with the first layer, the second layer comprising carbon and at least one ignition aid, wherein the combustible first layer and the second layer are longitudinal concentric layers having a density of at least 0.6 g/cm 3 and wherein the composition of the first layer (4, 10) is different from the composition of the second layer (6, 12).