Absorbent article with a slitted absorbent core
AssigneeDSG Technology Holdings Ltd.
InventorsAndrew Wright, Patrick King Yu Tsang
Life of this patent
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Abstract
The invention relates to slit absorbent articles and the use of slits in absorbent materials to provide improved liquid intake rate, flexibility and softness compared to the unmodified material. The absorbent material, including superabsorbent materials, are particularly useful as absorbent cores in disposable absorbent articles such as diapers, incontinent products, sanitary napkins and the like.
Claims25
A method of manufacturing a disposable absorbent article comprising:
- providing an absorbent core having superabsorbent material including superabsorbent polymer particles and a nonwoven substrate including a low-density layer and a high-density layer, wherein the superabsorbent polymer particles are covered or intermixed with microfibrillated cellulose and embedded into pores of the nonwoven substrate in the low-density layer;
- and
- slitting the absorbent core to provide a plurality of slits, with a greater number of slits per unit area defining a region of greater liquid intake of the absorbent core as compared to another region of the absorbent core having a fewer number of slits per unit area.
An absorbent article, the absorbent article comprising:
- a liquid impervious back sheet;
- and
- an absorbent core containing at least one layer of superabsorbent material (SAP) and including a plurality of slits, said plurality of slits extending through at least a portion of said superabsorbent material;
- wherein said plurality of slits have a slit width of between 1 micron and 400 microns;
- and
- wherein the absorbent core includes at least one layer of:
- a nonwoven substrate including a low-density layer and a high-density layer;
- and
- wherein the SAP is covered or intermixed with microfibrillated cellulose and embedded into pores of the nonwoven substrate in the low-density layer.
A method of manufacturing a disposable absorbent article having a crotch area, the method comprising:
- providing a generally liquid impervious back sheet;
- connecting an absorbent core to said back sheet, said core including at least one layer containing superabsorbent material and wherein the absorbent core includes from 50% to 97% by weight of superabsorbent material and from 3% to 50% by weight of fibers, and a low density nonwoven substrate and a high density nonwoven substrate, superabsorbent particles being covered or intermixed with microfibrillated cellulose and embedded into the pores of the low density nonwoven substrate of the nonwoven substrate;
- and
- slitting said at least one layer of said absorbent core in said crotch area, said slitting improving the liquid intake and flexibility of the absorbent core as compared to a similar, but non-slitted, core, wherein said plurality of slits have a slit width of between 1 micron and 1000 microns to support a capillary flow of liquid into an interior of the absorbent core.
Dependencies are inferred from the claim text.