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Thin-unit-wet absorbent foam materials for aqueous body fluids and process for making same

  • US 5,387,207 A
  • Filed: 12/11/1992
  • Issued: 02/07/1995
  • Est. Priority Date: 08/12/1991
  • Status: Expired due to Term
First Claim
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1. A collapsed polymeric foam material which, upon contact with aqueous body fluids, expands and absorbs said fluids, said polymeric foam material comprising a hydrophilic, flexible, nonionic polymeric foam structure of interconnected open cells, which foam structure has:

  • A) a specific surface area per foam volume of at least about 0.025 m2 /cc;

    B) at least about 0.1% by weight of said polymeric foam material of a toxicologically acceptable hygroscopic, hydrated salt incorporated therein;

    C) in its collapsed state, an expansion pressure of about 30 kPa or less; and

    D) in its expanded state, a density when saturated at 88°

    F. (31.1°

    C.) to its free absorbent capacity with synthetic urine having a surface tension of 65±

    5 dynes/cm of from about 10 to about 50% of its dry basis density in its collapsed state.

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