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Absorbent structures containing stiffened fibers and superabsorbent material

  • US 5,360,420 A
  • Filed: 12/17/1990
  • Issued: 11/01/1994
  • Est. Priority Date: 01/23/1990
  • Status: Expired due to Term
First Claim
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1. An absorbent article for acquisition, distribution, and storage of bodily fluids, said article comprising:

  • (a) a fluid pervious topsheet;

    (b) a fluid impervious backsheet affixed to said topsheet; and

    (c) an absorbent core disposed between said topsheet and said backsheet, said absorbent core having;

    (i) a fluid acquisition/distribution layer having an average dry density of less than about 0.30 g/cc, an average density upon saturation with 1% NaCl aqueous solution, dry weight basis, of less than about 0.20 g/cc, and an average dry basis weight of from about 0.001 to about 0.10 g/cm2, said acquisition/distribution layer comprising from about 50% to 100%, dry weight basis, of hydrophilic chemically stiffened cellulosic fibers and from 0% to about 50%, dry weight basis, of a binding meansfor said fibers; and

    (ii) a fluid storage layer, positioned beneath said acquisition/distribution layer relative to said topsheet, comprising at least about 15%, by weight of said storage layer, of superabsorbent material and from 0% to about 85% of a carrier means for said superabsorbent material;

    said acquisition/distribution layer having no more than about 6.0% of superabsorbent material and having a top surface area which is from about 15% to about 95% of, and smaller than, the top surface area of said fluid storage layer, said fluid acquisition/distribution layer further being maintained in unimpeded fluid communication with said top surface area of said fluid storage layer.

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