Tobacco-smoke filters

Details Tobacco-smoke filters Tobacco-smoke filters

A - Human Necessities

24

D

131/20

A24D 3/06 (2006.01) A24D 3/16 (2006.01)

Patent

CA 1106256

ABSTRACT A tobacco-smoke filter comprises in admixture or close dispersion a first component which is a ready but weak or weakly retentive adsorbent for vapour-phase constituents, including aldehydes, of tobacco smoke, and a second compon- ent comprising amino groups, of which at least 30% are pre- fereably primary groups, and being capable of chemically com- binning with said constituents to give substantially non- volatile reaction products. Suitably the first component may comprise a porous mineral earth, such as magnesium sil- icate or silica gel in porous granular form. The second component may comprise an ion-exchange resin or polyethylene imine. The second component may be carried upon a porous particulate material or carried or grafted upon a fibrous material or dispersed in a fibrous material carrying the second material in a sipersed condition. Alternatively, a mixture of granular first and second components may be dispersed in a fibrous or filamentary material or disposed between plugs of such material.

327443

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