FIELD: smoking accessories.
SUBSTANCE: invention relates to a liquid release component that provides sustained release of liquid upon compression and to a smoking article comprising such a liquid release component. Smoking article includes at least one liquid release component made from a sustained-release liquid delivery material, wherein the liquid delivery material comprises a closed matrix structure comprising a polymer matrix having a plurality of domains and formed from one or more polysaccharides cross-linked by multivalent cations; and a liquid composition that is trapped within the domains and is releasable from the closed matrix structure upon compression of the material, wherein the concentration of multivalent cations in the closed matrix structure varies such that along a line extending through the liquid release component from the outer surface of the closed matrix structure to the centre of mass of the liquid release component, the highest concentration of multivalent cations within 250 microns from the outer surface of the closed matrix structure is at least 1.5 times the highest concentration of multivalent cations within 500 microns from the centre of mass.
EFFECT: technical result of the invention is to provide an improved liquid delivery material for a smoking article that provides an indication to the consumer that the liquid has been released from said material and exhibits improved stability and improved retention of liquid additives during storage.
15 cl, 1 ex, 1 dwg
