Article for separations and purifications and method of controlling porosity therein
US5248428A · kind A · utility
28Cited by
33References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1992 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Dec 3, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite article comprising, in the unexpanded form, a fibrillated PTFE matrix and a combination of energy expandable hollow polymeric particles and sorptive particles, which composite, on applying energy such as steam, heat, or laser energy, provides an expanded article having increased void volume and decreased density. The expanded articles are porous and efficient articles for separation and purification applications. In flat or rolled form, the composite article can be used in separation devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.