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Patents

Absorbent Polymeric Material

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By: Karen McIntyre

Editor, Nonwovens Industry

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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