Porous sheets and method of manufacture
US4256845A · kind A · utility
16Cited by
33References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Feb 15, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A porous thermoplastic sheet is formed by adding a material to a polymer latex to passivate the aqueous phase of the latex. An additional material of a preselected particle size, corresponding to the desired pore size of the final product is then added. The latex composition is gelled and is then formed into a sheet. The sheet is dried and cured or sintered and the solubles are extracted therefrom with a solvent. A preferred polymer latex is PTFE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.