FIELD: chemistry.
SUBSTANCE: electret article includes a polymeric material having the imparted electric charge, CF3:CF2 ratio of at least 0.15 and 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 obtained electret article is resistant to charge degradation upon exposure to high temperatures for prolonged time periods.
EFFECT: providing of resistance to charge degradation upon exposure to high temperatures for prolonged time periods.
26 cl, 6 dwg, 5 tbl
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