E.i. Dupont De Nemours and Company

Actamax Surgical Materials, LLC

Dupont Safety & Construction, Inc.

Dupont Electronics, Inc.

Cummins Filtration Inc.

Tao Huang

Jack Eugene Armantrout

Thomas Patrick Daly

Samuel David Arthur

George K Kodokian

Larry Ray Marshall

William Gerald DiMaio, Jr

Zachary R Dilworth

John R Moore

Thomas William Harding

Neil Jay Croft, Jr

Carl Saquing

Glenn Creighton Catlin

Neal Pfeiffenberger

Kostantinos Kourtakis

Hyun Sung Lim

Marios Avgousti

Mark David Wetzel

Wai-Shing Yung

Tim Mueller

James M Oconnor

William H Dunn

Scott Yembrick

Jay J Croft

James M O'CONNOR

In a first aspect, a coated film includes a polyimide film, a curable resin coating composition and an adhesion-promoter. The curable resin coating composition includes a curable oligomer and first nanoparticles. The adhesion-promoter includes a polyamic acid composition and is on a surface of the polyimide film that is in contact with the curable resin coating composition. In a second aspect, an electronic device includes the coated film of first aspect.

Coated films and electronic devices

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

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

The invention relates to a process for forming nanofibers from a spinning solution utilizing a high speed rotating spin disk having a flat surface. The nanofibers can be collected into a uniform web for selective barrier end uses.

Centrifugal solution spun nanofiber process

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 attenuated 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.

The present invention is directed toward an improved air filtration medium comprising a single layer polymeric nanofibrous web comprising a single source randomly intermingled fiber network with electrostatic charge up to &#x2212;20 kV, a filtration efficiency range from about 70% to about 99.99%, and an air resistance less than about 2.5 mm wg for 0.3 diameter micron particles. The air filtration medium is made from a centrifugal melt spinning process.

Electret nanofibrous web as air filtration media

Disclosed herein is a fibrous tissue sealant in the form of an anhydrous fibrous sheet comprising a first component which is a fibrous polymer containing electrophilic or nucleophilic groups and a second component capable of crosslinking the first component when the sheet is exposed to an aqueous medium, thereby forming a crosslinked hydrogel that is adhesive to biological tissue. The fibrous tissue sealant may be useful as a general tissue adhesive for medical and veterinary applications such as wound closure, supplementing or replacing sutures or staples in internal surgical procedures, tissue repair, and to prevent post-surgical adhesions. The fibrous tissue sealant may be particularly suitable for use as a hemostatic sealant to stanch bleeding from surgical or traumatic wounds.

Method of using fibrous tissue sealant

The invention relates to a process for forming fibers from a spinning solution utilizing a high speed rotary sprayer. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.

Solution spun fiber process

Fibrous tissue sealant and method of using same

A process and apparatus for forming nanofibers from a spinning melt utilizing a high speed rotating distribution disc. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.

Production of nanofibers by melt spinning

Growing community of inventors

Downingtown, PA, United States of America

Tao Huang