Smoking mixture

DETAILED DESCRIPTION We claim: 1.
An improved smoking mixture comprising cellulose or a modified cellulose as smoke-producing fuel and up to 5% by weight of melamine.
2.
An improved smoking mixture according to claim 1 comprising a thermally degraded carbohydrate as smoke-producing fuel.
3.
An improved smoking mixture according to claim 2 comprising as smoke-producing fuel a thermally degraded carbohydrate prepared by subjecting carbohydrate to a catalysed degradation at above 100.
degree.
C until the weight of the degraded material is less than 90% of the dry weight of the original carbohydrate.
4.
An improved smoking mixture according to claim 3 wherein the thermally degraded carbohydrate is thermally degraded cellulose.
5.
An improved smoking mixture according to claim 1 comprising carboxymethylcellulose or a salt thereof as smoke-producing fuel.
6.
An improved smoking mixture according to claim 1 comprising tobacco as smoke-producing fuel.
7.
An improved smoking mixture according to claim 1 wherein the proportion of melamine is from 1 to 3% by weight.
8.
An improved smoking mixture according to claim 1 containing 40 to 65% by weight of inorganic filler.
9.
An improved smoking mixture according to claim 1 in a fabricated form simulating tobacco, or in a form from which tobacco-simulating material can be produced.




Description:
This invention relates to smoking mixtures.
In view of the widely held opinion that the smoking of tobacco, especially in cigarette form, can cause lung cancer and bronchitic ailments attention is turning to the provision of smoke-producing substrates which produce less tar and other harmful substances than tobacco, for example to cellulose, cellulose ethers, particularly carboxymethylcellulose and its salts, oxidised cellulose and particularly to heat treated cellulose prepared for example by the process described and claimed in our United Kingdom Patent No.
1,113,979.
Such smoke-producing substrates give rise to formaldehyde and the smoke from them may contain amounts of formaldehyde comparable with or even higher than the amount in tobacco smoke