Immobilizing particulate absorbents by conversion to hydrates
US4826880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Sep 21, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31975
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to absorbent compositions, to methods for handling and immobilizing particulate absorbents, and to absorbent articles produced from the absorbent compositions. Absorbent materials such as cross-linked, water-insoluble and water-swellable particulate polymers are immobilized and safely handled by adding thereto an aqueous liquid such as water or saline in amounts sufficient to form hydrates in which the water comprises from 20% to 80% by weight of the total hydrate. The hydrates may be extruded, sprinkled, or sprayed and can be incorporated into absorbent articles such as diapers and tampons by conventional means. The hydrates unexpectedly increase the total water absorbency of the absorbent on a dry basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.