Smoking material

Claim 1

A process for preparing a material containing substantially no tobacco suitable for use in smoking products comprising intimately mixing a film-forming, nontoxic combustible matrix comprising as the primary combustible material at least one film-forming cellulose ether selected from the group consisting of carboxymethyl cellulose, carboxymethyl cellulose salts, carboxyethyl cellulose, hydroxyethyl cellulose, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, and carboxymethyl hydroxyethyl cellulose, with a combustion modifier consisting essentially of at least one particulate filler selected from the group consisting of titanium dioxide, magnesium oxide, silica gel, sodium alignate, silica aluminate, calcium carbonate, diatomaceous earth, dolomite, carbon, perlite, magesite, zeolite and vermiculite; said primary combustible material and said film former being present in a weight to weight ratio of about 15:85 to about 85:15, and up to 5 percent by weight of the mixture of a blowing agent, forming a film from the mixture, and heating said film to above the gasification temperature of said blowing agent to produce a blown film having a density of from about 0.3 to about 0.6 gram per cubic centimeter.