METHOD OF IMPARTING REDUCED IGNITION PROPENSITY TO SMOKING ARTICLES USING PHASE TRANSITION MATERIALS

摘要

A smoking article having a phase transition substance to impart reduced ignition propensity to a smoking article comprising a tobacco column and a wrapper surrounding the tobacco column and having a porous structure with a base permeability. The smoking article comprises a pattern of phase transition material on a surface of the wrapper such that, when the phase transition material is subjected to the heat of a burning firecone of the tobacco column, the phase transition material at least partially fills the wrapper porous structure in the vicinity of the burning firecone to form an area on the wrapper having a reduced permeability that is lower than the wrapper base permeability, imparting reduced ignition propensity when placed on a substrate.