E.i. Dupont De Nemours and Company

Lakshmi Krishnamurthy

T Joseph Dennes

Pankaj Arora

Stephen Mazur

Glen Edward Simmonds

Eric P Holowka

Stephane Francois Bazzana

Mark Weinberg

Sabine Gabriel

Mieczyslaw (Michel) Stachnik

Joseph T Dennes

The present invention relates to a flame retardant plexifilamentary film-fibril strand comprising at least one polyolefin and at least one flame retardant selected from the group consisting of: phosphate esters, phosphonate esters, phosphinate esters, polyphosphazines, nitrogen-containing polyphosphates, hindered amines and mixtures thereof. The present invention also relates to flame retardant sheet made from the flame retardant plexifilamentary film-fibril strands. The sheet can be made into a flame retardant building substrate, garment, banner, light reflector and cover.

Flame retardant flash spun sheets

This invention provides a multi-layer article comprising a first electrode material, a second electrode material, and a porous separator disposed between and in contact with the first and the second electrode materials, wherein the porous separator comprises a nanoweb consisting essentially of a plurality of nanofibers of a fully aromatic polyimide. Also provided is a method for preparing the multi-layer article, and an electrochemical cell employing the same. A multi-layer article comprising a polyimide nanoweb with enhanced properties is also provided.

Multi-layer article comprising polyimide nanoweb

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Wilmington, DE, United States of America

Lakshmi Krishnamurthy