Methods for producing fiber reinforced microspheres made from dispersed particle compositions
US4867931A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S75/953
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Fiber reinforced hollow microspheres made from dispersed particle film forming compositions including fibers, dispersed particles, a binder, a film stabilizing agent, a dispersing agent and a continuous liquid phase. Porous and non-porous fiber reinforced hollow microspheres can be made. The fiber reinforced hollow microspheres have walls with voids which are interconnected to each other and to the inner and outer wall surfaces, and the fiber reinforced hollow microspheres can be used as membrane substrates in selective separation processes and in biotech processes. The fiber reinforced hollow microspheres can be used as supports for catalysts and as enclosures for catalysts, adsorbents and absorbents. The fiber reinforced hollow microspheres can also be used as filler materials and as proppants for increasing gas recovery from gas wells. The fiber reinforced hollow microspheres are made by a process which includes forming a film of a fiber and dispersed particle film forming composition across a coaxial blowing nozzle, applying a blowing gas at a positive pressure on the inner surface of the fiber and dispersed particle composition film to blow the film and form an elongated cylin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.