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Absorbent articles comprising hydrophilic nonwoven fabrics

  • US 7,521,587 B2
  • Filed: 09/30/2003
  • Issued: 04/21/2009
  • Est. Priority Date: 09/30/2002
  • Status: Expired due to Fees
First Claim
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1. An absorbent article comprising a substantially liquid pervious topsheet, a substantially liquid impervious backsheet and an absorbent core between said topsheet and said backsheet, wherein said topsheet comprises a nonwoven fabric, wherein said nonwoven fabric comprisesa plurality of fibers;

  • hydrophilic polymers chemically grafted to the surface of at least a part of said plurality of fibers, said hydrophilic polymers being chemically grafted to said fibers by way of reactive radicals formed from at least one of (i) a reaction between a monomer molecule and a radical polymerization initiator molecule and (ii) a reaction between the fiber surface and a radical polymerization initiator molecule, the amount of radical polymerization initiator molecules being less than 2 wt % of the monomer molecules; and

    agent molecules, the amount of radical polymerization initiator molecules being at least three times the amount of the agent molecules by weight,wherein said nonwoven has a liquid strike through time of less than 5 s for a fifth gush of liquid and wherein said nonwoven provides a surface tension measurement of at least 65 mN/m according to the Determination of Surface Tension method.

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