Absorbent material and method of production
OwnerGraham E. Steer, Padraig G. Troyinventors
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Abstract
A superabsorbent formulation is described for absorbing liquids (for example in an ostomy, incontinence or woundcare application), the formulation comprising superabsorbent (100 pbw), silica (3-20 pbw), water (0.5-8 pbw) and glycerol (5-40 pbw). The superabsorbent and silica are mixed together in a first production stage (10), to coat the superabsorbent particles with silica. The glycerol and water are added during a second production stage (12). The effect of the silica is to increase the amount of glycerol and water which can be taken up in the formulation, thereby producing a product with greater structural stability when consolidated (compressed).
Claims31
A formulation for utilisation to absorb liquid, comprising:
- superabsorbent;
- silica;
- water;
- and
- a non-volatile lubricious polyhydroxy compound which is water-soluble or water-dispersible at or below 40° C. and is liquid at room temperature.
A formulation according to 2 wherein the silica is present in a quantity of at least 4 pbw .
A method of producing a superabsorbent formulation, the method comprising:
- (a) mixing together superabsorbent and silica to at least partly coat the superabsorbent with silica;
- and
- (b) mixing with the silica coated superabsorbent, water and a non-volatile lubricious polyhydroxy compound which is water-soluble or water-dispersible at or below 40° C. and is liquid at room temperature.
A method of producing a superabsorbent formulation, the method comprising:
- (a) providing superabsorbent particles which are substantially entirely coated with silica;
- and
- (b) mixing with the silica coated superabsorbent, water and a non-volatile lubricious polyhydroxy compound which is water-soluble or water-dispersible at or below 40° C. and is liquid at room temperature.
An ostomy, incontinence or woundcare product comprising or containing a superabsorbent formulation, the formulation comprising:
- superabsorbent;
- silica;
- water;
- and
- a non-volatile lubricious polyhydroxy compound which is water-soluble or water-dispersible at or below 40° C. and is liquid at room temperature.
Use of a superabsorbent formulation in an ostomy, incontinence or woundcare product, the formulation comprising:
- superabsorbent;
- silica;
- water;
- and
- a non-volatile lubricious polyhydroxy compound which is water-soluble or water-dispersible at or below 40° C. and is liquid at room temperature.
Dependencies are inferred from the claim text.