Electret article having high fluorosaturation ratio

Details Electret article having high fluorosaturation ratio Electret article having high fluorosaturation ratio

2007-07-17

2007-07-17

Chiesa, Richard L. (Department: 1724)

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

C055S528000, C055SDIG033, C055SDIG035, C055SDIG039, C095S059000, C307S400000, C442S082000, C442S088000

Reexamination Certificate

active

11119877

ABSTRACT:
An electret article that includes a polymeric material that has electric charge imparted thereto, that has a CF3:CF2ratio of at least 0.15 and that has a fluorosaturation ratio greater than about 200. The electret article may be in the form of a porous web of polymeric fibers suitable for use as a filter. The inventive electret article is resistant to charge degradation upon exposure to high temperatures for prolonged time periods.

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