Technicka Univerzita V Liberci

Egu—hv Laboratory A.s.

Jiri Chvojka

David Lukas

Martin Bilek

Petr Mikes

Jan Valtera

Pavel Pokorny

Jaroslav Beran

Ondrej Batka

Josef Skrivanek

Tomas Kalous

Filip Sanetrnik

Eva Kostakova

Evzen Amler

Lubomir Kocis

Matej Buzgo

Andrea Mickova

Eva Kuzelova-Kostakova

Petr Zabka

Jiri Komarek

A method, system, and resulting linear fibrous formation are provided wherein a supporting linear formation defines a core that is transported through a spinning chamber. A coating of polymeric nanofibers enveloping the supporting linear formation in the spinning chamber. The coating of polymeric nanofibers comprises a flat stripe wound around the core into a helical form, the flat stripe created from a hollow electrically neutral nanofibrous plume generated in a spinning space above a spinning electrode during spinning by AC electric voltage in the spinning chamber.

Linear fibrous formation with a coating of polymeric nanofibers enveloping a supporting linear formation constituting a core, a method and a device for producing it

The invention relates to a method for production of polymeric nanofibers, in which polymeric nanofibers are created due to the action of force of an electric field on solution or melt of a polymer, which is located on the surface of a spinning electrode, whereby the electric field for electrostatic spinning is created alternately between the spinning electrode (), to which is supplied alternating voltage, and ions () of air and/or gas generated and/or supplied to proximity of the spinning electrode (), whereby according to the phase of the alternating voltage on the spinning electrode () polymeric nanofibers with an electric charge of opposite polarity and/or with segments with an electric charge of opposite polarity are created, which after their creation cluster together under the influence of the electrostatic forces into linear formation in the form of a tow or a band, which moves freely in space in direction of gradient of the electric fields away from the spinning electrode (). The invention further relates to a linear formation from polymeric nanofibers fabricated by this method.

Method for production of polymeric nanofibers by spinning of solution or melt of polymer in electric field

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Liberec, Czechia

Jiri Chvojka