Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absorbent polymer

US5669894A · kind A · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Stephen Allen Goldman · Wyoming, US
• Nancy Ann Haynes · Okeana, US
• Todd Leon Mansfield · Cincinnati, US
• Manfred Plischke · Rheinböllen, DE
• Herbert L. Retzsch · Hamilton, US
• Trevor C. Walker · Cincinnati, US
• Gerald Alfred Young · Lawrenceburg, US

Key dates

• Filing date: Oct 1, 1996
• Grant date: Sep 23, 1997
• Expiry date: Oct 1, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/269
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Absorbent members useful in the containment of body fluids such as urine, that have at least one region containing hydrogel-forming absorbent polymer in a concentration of from about 60 to 100% by weight and providing a gel-continuous fluid transportation zone when in a swollen state. This hydrogel-forming absorbent polymer has: (a) a Saline Flow Conductivity (SFC) value of at least about 30.times.10.sup.-7 cm.sup.3 sec/g; (b) a Performance under Pressure (PUP) capacity value of at least about 23 g/g under a confining pressure of 0.7 psi (5 kPa); and (c) a basis weight of at least about 10 gsm. In addition, the region where this hydrogel-forming absorbent polymer is present has, even when subjected to normal use conditions, sufficient wet integrity such that the gel-continuous zone substantially maintains its ability to acquire and transport body fluids through the gel-continuous zone.