Absorbent member exhibiting exceptional expansion properties when wetted
US6296929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/627
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An absorbent member is disclosed which has a high absorbent capacity and which exhibits exceptional expansion properties when wetted by an aqueous fluid. The absorbent member includes a multitude of randomly oriented cellulosic fibers having an average length of from between about 1 mm to about 5 mm and containing at least about 20% lignin within each fiber. The absorbent member also has a moisture content of from between about 1% to about 20% water by weight of fiber and has a density in the range of from between about 0.1 g/cc to about 1 g/cc. The fibers are stressed and bonded by hydrogen bonds and are retained in an elastically stressed condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.