E.i. Dupont De Nemours and Company

Dupont Safety & Construction, Inc.

Neil Jay Croft, Jr

Tao Huang

Jack Eugene Armantrout

Thomas William Harding

Thomas Patrick Daly

Zachary R Dilworth

Carl Saquing

Glenn Creighton Catlin

The present disclosure is directed toward an improved nanofibrous electret filtration media of which the stand-alone electret nanofibrous web comprises a single source randomly intermingled fiber network that yields high breathability due to the high porosity and improved filtration efficiency for use as improved filtration media for respiratory devices and face masks.

Melt spun filtration media for respiratory devices and face masks

A method for laying down a nanoweb of nanofibers from a centrifugal spinning process by a combination of an air flow field and a charging arrangement. Fibrous streams in the form of fibrils of molten polymer or polymer solution are discharged from a rotating member into an air flow field that is essentially parallel to the direction of discharge of fibrils at the point of discharge of the fibrils. The fibrous streams are attentuated and directed by means of the air flow field onto the surface of a collector to form a nanoweb. The fibrous streams are charged along all or at least a portion of their route from the point of discharge to the surface of the collector.

Process for laying fibrous webs from a centrifugal spinning process

Growing community of inventors

Middletown, DE, United States of America

Neil Jay Croft, Jr