Absorbent Polymeric Material: No. 7,335,422; Stefan Dick, Sebastien Brogly, Eric Judek and Francois Dessus, assignor to Sud-Chemie Inc., Louisville, KY.
Absorbent Polymeric Material: No. 7,335,422; Stefan Dick, Sebastien
Brogly, Eric Judek and Francois Dessus, assignor to Sud-Chemie Inc.,
Louisville, KY. Filed 11/24/04. Issued 2/26/08.
A moisture absorbing polymeric product has been patented. It
comprises a blend of a thermoplastic material and an absorbing agent.
The thermoplastic material is transformed into a molten or essentially
non-solid state during formation of the product. The product comprises
at least one migration zone and an interior region. The migration zone
is defined as the portion of the product from its surface to where the
accumulation of the absorbing agent levels off. The maximum
concentration of the absorbing agent within a given volume unit of the
migration zone at the surface of the product is at least twice that of
the absorbing agent within that same volume unit of the interior region.
The absorbing agent is concentrated within the migration zone in a
gradient that increases from the interior region to the surface of the
product. A wicking fiber is not added to the blend.
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