A powdered super absorbent polymer (SAP) has heretofore been used as a water retentive material for sanitary products, such as sanitary napkin, disposable diaper and incontinence pad. This water retentive material is used by being held between two paper sheets but the powdered SAP comes off easily from...http://www.google.de/patents/US5998025?utm_source=gb-gplus-sharePatent US5998025 - Water-retentive cellulose fiber, method of manufacturing the same, and water-retentive sheet comprising cellulose fiber of high water retentivity
