Fluorinated electret

Details Fluorinated electret Fluorinated electret

C - Chemistry, Metallurgy

08

F

C08F 8/24 (2006.01) B03C 3/28 (2006.01) C08F 8/20 (2006.01) C08J 7/12 (2006.01) H01G 7/02 (2006.01)

Patent

CA 2334806

An electret that includes a surface modified polymeric article having surface fluorination produced by fluorinating the polymeric article. The electret may be a nonwoven fibrous web that comprises electrically charged microfibers where the web has fluorination that includes CF3 and CF2 groups on the surface of the fibers at a CF3:CF2 ratio of at least 0.45.

La présente invention concerne un électret intégrant un article polymère à surface modifiée présentant en l'occurrence une fluoration de surface résultant de la fluoration de l'article polymère. L'électret peut être un voile fibreux non tissé intégrant des microfibres électriquement chargées. La fluoration du voile a apporté sur la surface des fibres des groupes CF¿3? et CF¿2? en respectant un rapport CF¿3?:CF¿2? d'au moins 0,45.

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