E.i. Dupont De Nemours and Company

Dupont Safety & Construction, Inc.

Cummins Filtration Inc.

Zachary R Dilworth

Tao Huang

Thomas Patrick Daly

Neil Jay Croft, Jr

The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.

Polymeric nanofibers and nanofibrous web

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

Apparatus for production of polymeric nanofibers

Growing community of inventors

Wilmington, DE, United States of America

Zachary R Dilworth