Superabsorbent water sensitive multilayer construction

Abstract

A multilayer construction that includes a first layer that includes water sensitive thermoplastic polymer and a second layer disposed on the first layer, the second layer including superabsorbent polymer.

1 . A multilayer construction comprising: 
 a first layer comprising water sensitive thermoplastic polymer; and    a second layer comprising superabsorbent polymer, said second layer being disposed on said first layer.    
   
   
       2 . The multilayer construction of  claim 1 , wherein said thermoplastic polymer comprises polyamide.  
   
   
       3 . The multilayer construction of  claim 1 , wherein said water sensitive thermoplastic polymer comprises the reaction product of polyoxyalkylene glycol diamine and an acid selected from the group consisting of dicarboxylic acid, dicarboxylic acid ester and combinations thereof, said polyoxyalkylene glycol diamine having the formula NH 2 —(CH 2 ) x —(OCH 2 —CH 2 ) y —O—(CH 2 ) x —NH 2 , where 2≦X≦3, and 1≦Y≦2.  
   
   
       4 . The multilayer construction of  claim 1 , wherein said water sensitive thermoplastic polymer comprises the reaction product of adipic acid and polyoxyalkylene glycol diamine.  
   
   
       5 . The multilayer construction of  claim 1 , wherein said water sensitive thermoplastic polymer is water soluble.  
   
   
       6 . The multilayer construction of  claim 1 , wherein said superabsorbent polymer comprises crosslinked polyacrylate.  
   
   
       7 . The multilayer construction of  claim 1 , wherein said superabsorbent polymer comprises crosslinked and at least partially neutralized α,β-beta ethylenically unsaturated monomers selected from the group consisting of monocarboxylic acid monomers, dicarboxylic acid monomers, acid anhydride monomers and combinations thereof.  
   
   
       8 . The multilayer construction of  claim 1 , wherein said construction exhibits an absorption rate greater than the absorption rate of the superabsorbent polymer layer in the absence of said thermoplastic layer.  
   
   
       9 . The multilayer construction of  claim 1 , further comprising perforations.  
   
   
       10 . A film comprising the multilayer construction of  claim 1 .  
   
   
       11 . The film of  claim 10 , wherein said film exhibits an absorption rate greater than the absorption rate of the superabsorbent polymer layer in the absence of said thermoplastic layer.  
   
   
       12 . The film of  claim 10 , further comprising perforations.  
   
   
       13 . A film comprising the multilayer construction of  claim 3 .  
   
   
       14 . A film comprising the multilayer construction of  claim 6 .  
   
   
       15 . A fiber comprising the multilayer construction of  claim 1 .  
   
   
       16 . A fiber comprising the multilayer construction of  claim 3 .  
   
   
       17 . A fiber comprising the multilayer construction of  claim 6 .  
   
   
       18 . An article comprising: 
 a nonwoven web; and    a multilayer construction disposed on said web, said multilayer construction comprising 
 a first layer comprising a water sensitive thermoplastic polymer; and  
 a second layer comprising a superabsorbent polymer, said second layer being disposed on said first layer.  
   
   
   
       19 . An article comprising: 
 an absorbent layer; and    a film comprising 
 a first layer comprising a water sensitive thermoplastic polymer, and  
 a second layer comprising a superabsorbent polymer, said second layer being disposed on said first layer.  
   
   
   
       20 . A multi-component fiber comprising: 
 a first component comprising water sensitive thermoplastic polymer; and    a second component comprising superabsorbent polymer, said second component being disposed on said first component.    
   
   
       21 . The multi-component fiber of  claim 20 , wherein said first component comprises a core and said second component comprises a sheath.  
   
   
       22 . A multi-component yarn comprising: 
 a first component comprising water sensitive thermoplastic polymer; and    a second component comprising superabsorbent polymer, said second component being disposed on said first component.    
   
   
       23 . The multi-component yarn of  claim 22 , wherein said first component comprises a core comprising the water sensitive thermoplastic polymer.  
   
   
       24 . The multi-component yarn of  claim 22 , wherein the second component comprises a sheath comprising the superabsorbent polymer.  
   
   
       25 . A disposable article comprising the multilayer construction of  claim 1 .  
   
   
       26 . A diaper comprising the multilayer construction of  claim 1.