US2012064792A1PendingUtilityA1

Water Absorbent Storage Layers

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Assignee: BAUDUIN CHRISTOPHEPriority: May 20, 2009Filed: May 17, 2010Published: Mar 15, 2012
Est. expiryMay 20, 2029(~2.9 yrs left)· nominal 20-yr term from priority
Inventors:Christophe Bauduin
Y10T442/699A61F 2013/530481A61F 13/53A61F 13/531A61L 15/60A61L 15/42A61L 15/22A61F 2013/530131A61F 2013/530007A61F 13/5323A61L 15/58A61L 15/28A61L 15/26A61L 15/24A61L 15/425A61F 2013/530802A61F 13/511A61F 13/51401A61F 13/539A61F 2013/53941
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Claims

Abstract

The present invention relates to improved water-absorbing storage layers for use in hygiene articles, the water-absorbing storage layers being essentially free of cellulose fibers.

Claims

exact text as granted — not AI-modified
1 . A water-absorbing storage layer consisting of a nonwoven backsheet, water-absorbing polymer particles, and a liquid-pervious topsheet, wherein the water-absorbing polymer particles are fixed on the nonwoven backsheet. 
     
     
         2 . The storage layer according to  claim 1 , wherein the liquid-pervious topsheet has been adhesive bonded to the nonwoven backsheet to form pockets. 
     
     
         3 . The storage layer according to  claim 2 , wherein bridges between the pockets are filled with further water-absorbing polymer particles and said further water-absorbing polymer particles are fixed to a second liquid-pervious topsheet by adhesive bonding to the first liquid-pervious topsheet. 
     
     
         4 . The storage layer according to  claim 1 , wherein the nonwoven backsheet has fibers directed downward and the water-absorbing polymer particles are present in the region of the fibers. 
     
     
         5 . The storage layer according to  claim 4 , wherein the liquid-pervious topsheet has been adhesive bonded to the fibers. 
     
     
         6 . The storage layer according to  claim 1 , wherein a liquid-pervious matrix is present between the nonwoven backsheet and the liquid-pervious topsheet. 
     
     
         7 . The storage layer according to  claim 6 , wherein the liquid-pervious matrix has been adhesive bonded to the nonwoven backsheet and the liquid-pervious topsheet. 
     
     
         8 . The storage layer according to  claim 1 , wherein the water-absorbing polymer particles have a centrifuge retention capacity of at least 15 g/g. 
     
     
         9 . A hygiene article comprising a water-absorbing storage layer according to  claim 1 .

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