Smoking article with water-disintegratable paper filtration material having water-susceptible adhesives
AssigneeBritish American Tobacco (Investments) Limited
InventorDavid John Dittrich
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Abstract
A cigarette is provided with a filter comprising a filter element of water-disintegratable paper. The paper is water swellable and/or the filter element comprises a water swellable agent. Tipping which interattaches the filter to the tobacco rod of the cigarette is anchored by means of water susceptible adhesive. Thus when the cigarette comes into contact with sufficient water, the filter element swells and the tipping opens away from the filter. This facilitates disintegration of the water-disintegratable paper.
Claims3
A smoking article comprising a rod of smoking material, a filter and wrapping paper means extending about said filter, adhesive anchoring said wrapper means being water susceptible adhesive and said filter comprising water-disintegratable paper filtration material, said paper filtration material being comprised of a paper web of water swellable cellulose fibres free of cellulose ester, and being such that upon immersion of said smoking article in a body of water, said fibres swell causing circumferential enlargement of said filtration material and said adhesive ceases to completely anchor said wrapper means to said filter causing opening of said wrapper means and thereby permitting said filtration material to disintegrate with a minimal degree of agitation into separated fibres in a period of 5-10 minutes from the inception of the immersion.
Dependencies are inferred from the claim text.