Membranes for absorbent packets
US5108383A · kind A · utility
327Cited by
3References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1989 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Dec 8, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An absorbent article comprising a cellulosic membrane about 5 to 50 .mu.m thick prepared by casting a film from solution of a cellulose derivative in a suitable solution and these formed into a packet which encapsulates an osmotic promoter, particularly sodium chloride, sugar or other suitable compound, preferably having a molecular weight below about 500. The packet is capable of taking up at least 0.001 g/cm.sup.2 /min of water and retaining it against an external pressure of at least 0.689 kPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.