Absorbent films and laminates
AssigneeThe Dow Chemical Company
InventorsRobert E. Erickson, Richard M. Krajewski
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Abstract
Water swellable aerated films and laminates, made from solutions of carboxylic polyelectrolytes, together with methods for their preparation, are disclosed. The films and laminates are cured and/or crosslinked with a polyfunctional or difunctional crosslinking agent that is reactive with carboxylate groups by heating and/or removing substantially all of the water and/or alcohol from the precursor composition. The solutions are mechanically aerated prior to the curing step. The absorbent articles have a rapid water absorbency rate and are useful as components in diapers, tampons, dressings and the like.
Claims25
A water swellable aerated film which is characterized by being rapidly wetted and swelled by water which comprises a lightly crosslinked alkali metal carboxylic polyelectrolyte having a density ranging from about 1.1 grams per cubic centimeter to about 0.3 grams per cc and a water absorbency rate of not greater than 60 seconds.
Dependencies are inferred from the claim text.