Porous hydrophilic polypropylene membrane, method for production thereof, and blood plasma separation apparatus
US5186835A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 26, 1990 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D63/084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A porous hydrophilic polypropylene membrane possessing a fine reticular structure, which is characterized by the fact that at least either of the opposite surfaces of membrane forms a surface layer of a reticular structure substantially equal to that in the interior of membrane, the membrane surfaces and the surfaces of pores in the membrane have a hydrophilic polymer chemically bonded thereto, and the membrane is composed substantially of a polypropylene possessing an average pore diameter in the range 0.1 to 2.0 .mu.m, a bubble point of not more than 2.0 kg/cm.sup.2, a porosity in the range of 60 to 85%, and a water permeability of not less than 2 ml/min.mmHgm.sup.2, a method for the production thereof, and a blood plasma separation apparatus incorporating such membranes in a housing are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.