Alkali-neutralising Superabsorbent Products
Patent #: 7,491,862
Inventor(s): Arie Besemer, Anne Mieke Verwilligen and Jeffrey Thornton
Company: SCA Hygiene Products Zeist B.V.
Patented is a superabsorbent article having improved odor control and microbial control. It comprises a liquid-impervious back layer, a liquid-absorbing intermediate layer containing a surface-crosslinked, partially neutralized, acidic hydrophilic polymer and a liquid-pervious, non-absorbing top layer. A low molecular weight alkali-neutralizing agent is evenly distributed in the absorbing intermediate layer. The alkali-neutralizing agent is distinguished from the partially neutralized, acidic hydrophilic polymer. The absorbing layer, after humidification with neutral water, has a pH of 5.6 or lower and the acidic polymer has a degree of neutralization of at least 50%.
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