Tobacco material containing non-isometric calcium carbonate microparticles

摘要: A smoking article formed from a tobacco material that includes non-isometric precipitated calcium carbonate microparticles is provided. The typically have mean diameter of about 50 nanometers to 3 micrometers, in some embodiments 80 1 micrometer, 100 400 nanometers, and embodiments, 200 300 nanometers. Such particles may an elongated morphology so the length greater than diameter. This be characterized by "aspect ratio" (length divided width), which 15, 2 12, 10. For example, average range 8 5 500 4 micrometer micrometers.