Hydrophilic film and process for producing the same
US6214382A · kind A · utility
7Cited by
2References
9Claims
0Family size
Inventors
Key dates
| Filing date | Dec 23, 1997 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Dec 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D67/0088
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention provides a hydrophilic membrane wherein a hydrophilic cellulose derivative of a number average molecular weight of 2000.about.8000 is adsorbed irreversibly to a hydrophobic membrane of an aromatic polymer. Since an amount of leaching substances is extremely small, the membrane can be used suitably in such fields as medical applications, electronics, etc. where even a quite small quantity of leaching substances from the membranes is limited especially small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.