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Absorbent core for absorbing body liquids and method

  • US 5,938,650 A
  • Filed: 07/29/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 08/09/1995
  • Status: Expired due to Term
First Claim
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1. A core for the absorption of liquids, said core consisting essentially of a pair of outer flat nonwoven porous fabric layers of thermoplastic fibers, each of said layers having a dry basis weight of from about 17.5 to 25 grams per square meter, said outer flat layers being heat sealed together along a plurality of intersecting lines to define a plurality of flat, closed, porous pockets, with said intersecting seal lines defining flow channels between pockets, and between 45 to 250 grams per square meter of liquid superabsorbing polymer in dry particulate form loosely contained in said closed pockets, said superabsorbing polymer being of the type in which the particles swell and remain as individual particles upon exposure to liquid, said core having a thickness of less than 7 mm in dry form, the contained superabsorbing polymer, after being exposed to liquid passing through said porous layers, swelling substantially to swell said pockets with said core defining a three dimensional bubble-like structure.

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