Smoking Articles with Reduced Ignition Proclivity Characteristics

摘要

A process for reducing the permeability of a paper wrapper used in the construction of a smoking article is disclosed. The paper wrapper is treated with a film-forming composition that forms treated discrete areas on the wrapper. The treated discrete areas have a permeability within a predetermined range sufficient to reduce the ignition proclivity properties of a smoking article made with the wrapper. In accordance with the present invention, the film-forming composition contains a film-forming material. The film-forming material has a relatively low viscosity. In this manner, the film-forming composition can have a relatively high solids content and still be applied to the wrapper using conventional techniques, such as by using a gravure printer.

主权项

1. A process for producing a paper wrapper having reduced ignition proclivity characteristics when incorporated into a smoking article comprising:
applying a film-forming composition to a paper wrapper at particular locations, the film-forming composition including a film-forming material comprising at least one of alginate, guar gum, pectin, polyvinyl alcohol, a cellulose derivative, starch, a starch derivative, or mixtures thereof, the film-forming material having a molecular weight such that the film-forming material has a viscosity of less than about 500 cP when present in a 3% by weight aqueous solution at 25° C., the film-forming composition forming treated discrete areas on the paper wrapper, the treated discrete areas being separated by untreated areas, the treated discrete areas having a BMI of less than 5 cm−1, the untreated areas of the paper wrapper having a permeability of greater than about 55 Coresta.