Absorbent structures with integral layer of superabsorbent polymer particles
AssigneeBuckeye Technologies Inc.
InventorsJames R. Gross, Samuel C. Baer, Steve Leptick, John P. Erspamer
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Abstract
A discrete superabsorbent layer is adhered to the lower surface of a fibrous absorbent structure using a water-based polymeric binder is disclosed. The advantages are that a superabsorbent roll good can be prepared for later conversion into disposable absorbent products. The use of the water-based polymeric binder prevents particles of superabsorbent from becoming dislodged from the structure during handling and processing.
Claims22
an absorbent structure suitable for fabrication into disposable personal care articles comprising:
- (A) a fibrous absorbent layer;
- and
- (B) a discrete superabsorbent layer which is substantially free of fibers and includes superabsorbent polymer particles localized therein, wherein the discrete superabsorbent layer is integral with and inseparably bonded to the surface of the fibrous absorbent layer by a polymeric binder comprising a natural or synthetic latex having a minimum film-forming temperature at or below room temperature.
An absorbent structure suitable for fabrication into disposable personal care articles comprising:
- (A) a fibrous absorbent layer;
- and
- (B) a discrete superabsorbent layer which is substantially free of fibers and includes superabsorbent polymer particles localized therein, wherein the discrete superabsorbent layer is integral with and inseparably bonded to the surface of the fibrous absorbent layer by a polymeric binder comprising a mixture of a natural or synthetic latex having a minimum film-forming temperature at or below room temperature, a carboxylic polyelectrolyte, and a crosslinking agent having the property of reacting with carboxyl or carboxylate groups.
Dependencies are inferred from the claim text.