ELECTRETIC FABRICS WITH ADDITIVES PROMOTING FABRIC CHARGING Russian patent published in 2013 - IPC D04H1/42 D04H13/00 B01D39/02 

FIELD: electrical engineering.

SUBSTANCE: electric fabrics contain a mixture of thermoplastic resin and an additive promoting charging. The additive promoting fabrics charging includes a heterocyclic imide material free of fluorated groups. The electretic fabrics production method involves the following stages: providing a thermoplastic material and an additive promoting charging and including a heterocyclic imide material free of fluorated groups, stirring the thermoplastic material and the additive promoting charging in the melt to produce a thermoplastic mixture, the fabrics forming and the fabrics electrostatic charging. One ensures production of electretic fabrics with additives promoting fabrics charging. Such additives promoting charging allow to produce electretic fabrics that may be easily charged using a number of various charging mechanisms such as tribocharging, direct current corona discharge, hydrocharging or their combination. Fabrics prepared from the mixture may have a form of films or unwoven fibrous fabrics.

EFFECT: unwoven microfibrous fabrics are suitable for use as electretic filtering materials.

25 cl, 5 tbl, 4 ex