Process for the manufacture of an interposed support of semipermeable membranes
US4701234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Apr 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24785
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The process of the invention concerns the manufacture of an interposed support of semipermeable microfiltration membranes, the support composed of a permeable mesh and a sealed border of elastomeric material. After deposition of an elastomeric film on a transfer support 2, the assembly which is obtained is cut into one or more elements 3 reconstituting the border; this or these elements 3 are applied on the mesh with their support(s) 2 and the elastomer is turned toward the mesh; then the mesh thus equipped is treated with pressure at a temperature of between 100.degree. and 150.degree. C. to cause the elastomer to penetrate into the mesh and to obtain a smooth border surface on each side of this mesh, allowing for a sealed joint. The product which is obtained is applied to the manufacture of microfiltration units, whether it has to do with ultrafiltration, with gas permeation or with hemodialysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.