US2005256469A1PendingUtilityA1

Absorbent structure with superabsorbent material

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Assignee: KIMBERLY CLARK COPriority: Apr 25, 2003Filed: Jun 15, 2005Published: Nov 17, 2005
Est. expiryApr 25, 2023(expired)· nominal 20-yr term from priority
Inventors:Jian QinSandra M. RogersMichael John NiemeyerKenneth Raymond Schueler, Jr.Steven Michael HurleyLawrence Howell SawyerWhei-Neen HsuMark JoyScott J. SmithMarkus FrankNancy Lange
A61L 15/60Y10T442/696Y10T428/2915A61F 2013/530788A61F 13/531A61F 13/15203A61F 13/53A61F 2013/530708A61L 15/28
56
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Claims

Abstract

An absorbent structure made at least in part from a superabsorbent material having a retention capacity (CRC) as determined by a Centrifuge Retention Capacity Test of at least about 25 g/g and a free swell gel bed permeability (GBP) as determined by a Free Swell Gel Bed Permeability Test of at least 575×10 −9 cm 2 . In another embodiment, the absorbent structure is made at least in part from a superabsorbent material having a retention capacity (CRC) as determined by a Centrifuge Retention Capacity Test of at least about 25 g/g, an absorbency under load (AUL) at 0.9 psi as determined by an Absorbency Under Load Test of at least 18 and a free swell gel bed permeability (GBP) as determined by a Free Swell Gel Bed Permeability Test of at least about 350×10 −9 cm 2 .

Claims

exact text as granted — not AI-modified
1 . An absorbent structure comprising at least in part a superabsorbent material having a retention capacity (CRC) as determined by a Centrifuge Retention Capacity Test of at least about 25 g/g and a free swell gel bed permeability (GBP) as determined by a Free Swell Gel Bed Permeability Test of at least 575×10 −9  cm 2 .  
     
     
         2 . An absorbent structure as set forth in  claim 1  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         3 . An absorbent structure as set forth in  claim 2  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 800×10 −9  cm 2 .  
     
     
         4 . An absorbent structure as set forth in  claim 3  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 1,100×10 −9  cm 2 .  
     
     
         5 . An absorbent structure as set forth in  claim 1  wherein the superabsorbent material has a retention capacity as determined by the Centrifuge Retention Capacity Test of at least about 27.5 g/g.  
     
     
         6 . An absorbent structure as set forth in  claim 5  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         7 . An absorbent structure as set forth in  claim 6  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 800×10 −9  cm 2 .  
     
     
         8 . An absorbent structure as set forth in  claim 1  wherein the superabsorbent material has a retention capacity as determined by the Centrifuge Retention Capacity Test of at least about 30 g/g.  
     
     
         9 . An absorbent structure as set forth in  claim 8  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         10 . An absorbent structure as set forth in  claim 9  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 700×10 −9  cm 2 .  
     
     
         11 . An absorbent structure as set forth in  claim 1  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by an Absorbency Under Load Test of at least about 15 g/g.  
     
     
         12 . An absorbent structure as set forth in  claim 11  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by the Absorbency Under Load Test of at least about 17.5 g/g.  
     
     
         13 . An absorbent structure as set forth in  claim 12  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by the Absorbency Under Load Test of at least about 19 g/g.  
     
     
         14 . An absorbent structure as set forth in  claim 13  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by the Absorbency Under Load Test of at least about 20 g/g.  
     
     
         15 . An absorbent structure as set forth in  claim 1  further comprising at least one of hydrophilic fibers and hydrophobic fibers.  
     
     
         16 . An absorbent structure as set forth in  claim 15  wherein the hydrophilic fibers comprise cellulosic fibers.  
     
     
         17 . An absorbent structure as set forth in  claim 1  where the superabsorbent material in the absorbent structure comprises in the range of about thirty percent to about ninety percent of the weight of the absorbent structure.  
     
     
         18 . An absorbent structure as set forth in  claim 1  wherein the superabsorbent material comprises one of at least about 75 weight percent anionic polymer and at least about 75 weight percent cationic polymer.  
     
     
         19 . An absorbent structure as set forth in  claim 18  wherein the superabsorbent material comprises one of at least about 85 weight percent anionic polymer and at least about 85 weight percent cationic polymer.  
     
     
         20 . An absorbent structure as set forth in  claim 19  wherein the superabsorbent material comprises one of at least about 90 weight percent anionic polymer and at least about 90 weight percent cationic polymer.  
     
     
         21 . An absorbent article comprising at least in part the absorbent structure of  claim 1 .  
     
     
         22 . An absorbent article as set forth in  claim 21  wherein the absorbent article is one of a diaper, a training pant, a feminine hygiene product and an incontinence product.  
     
     
         23 . An absorbent structure comprising at least in part a superabsorbent material having a retention capacity (CRC) as determined by a Centrifuge Retention Capacity Test of at least about 25 g/g, an Absorbency Under Load (AUL) at 0.9 psi as determined by an Absorbency Under Load Test of at least 18 and a free swell gel bed permeability (GBP) as determined by a Free Swell Gel Bed Permeability Test of at least about 350×10 −9  cm 2 .  
     
     
         24 . An absorbent structure as set forth in  claim 23  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 400×10 −9  cm 2 .  
     
     
         25 . An absorbent structure as set forth in  claim 24  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         26 . An absorbent structure as set forth in  claim 25  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 800×10 −9  cm 2 .  
     
     
         27 . An absorbent structure as set forth in  claim 26  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 1,100×10 −9  cm 2 .  
     
     
         28 . An absorbent structure as set forth in  claim 23  wherein the superabsorbent material has a retention capacity as determined by the Centrifuge Retention Capacity Test of at least about 27.5 g/g.  
     
     
         29 . An absorbent structure as set forth in  claim 28  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 400×10 −9  cm 2 .  
     
     
         30 . An absorbent structure as set forth in  claim 29  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         31 . An absorbent structure as set forth in  claim 30  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 800×10 −9  cm 2 .  
     
     
         32 . An absorbent structure as set forth in  claim 28  wherein the superabsorbent material has a retention capacity as determined by the Centrifuge Retention Capacity Test of at least about 30 g/g.  
     
     
         33 . An absorbent structure as set forth in  claim 32  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 400×10 −9  cm 2 .  
     
     
         34 . An absorbent structure as set forth in  claim 33  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 600×10 −9  cm 2 .  
     
     
         35 . An absorbent structure as set forth in  claim 34  wherein the superabsorbent material has a free swell gel bed permeability as determined by the Free Swell Gel Bed Permeability Test of at least about 700×10 −9  cm 2 .  
     
     
         36 . An absorbent structure as set forth in  claim 23  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by the Absorbency Under Load Test of at least about 19 g/g.  
     
     
         37 . An absorbent structure as set forth in  claim 36  wherein the superabsorbent material has an Absorbency Under Load (AUL) at 0.9 psi as determined by the Absorbency Under Load Test of at least about 20 g/g.  
     
     
         38 . An absorbent structure as set forth in  claim 23  further comprising at least one of hydrophilic fibers and hydrophobic fibers.  
     
     
         39 . An absorbent structure as set forth in  claim 38  wherein the hydrophilic fibers comprise cellulosic fibers.  
     
     
         40 . An absorbent structure as set forth in  claim 23  where the superabsorbent material in the absorbent structure comprises in the range of about thirty percent to about ninety percent of the weight of the absorbent structure.  
     
     
         41 . An absorbent structure as set forth in  claim 23  wherein the superabsorbent material comprises one of at least about 75 weight percent anionic polymer and at least about 75 weight percent cationic polymer.  
     
     
         42 . An absorbent structure as set forth in  claim 41  wherein the superabsorbent material comprises one of at least about 85 weight percent anionic polymer and at least about 85 weight percent cationic polymer.  
     
     
         43 . An absorbent structure as set forth in  claim 42  wherein the superabsorbent material comprises one of at least about 90 weight percent anionic polymer and at least about 90 weight percent cationic polymer.  
     
     
         44 . An absorbent article comprising at least in part the absorbent structure of  claim 23 .  
     
     
         45 . An absorbent article as set forth in  claim 44  wherein the absorbent article is one of a diaper, a training pant, a feminine hygiene product and an incontinence product.

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