Non-layered absorbent insert having Z-directional superabsorbent concentration gradient
US4699823A · kind A · utility
224Cited by
17References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Aug 21, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved absorbent article includes a layer of absorbent material which has a length, a width and a thickness. Particles of superabsorbent material are distributed within the absorbent material layer, and these superabsorbent particles are disposed to form a substantially continuous, non-step-wise, positive concentration gradient of superabsorbent through at least a portion of the thickness of the absorbent layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.