NONWOVEN FIBROUS WEB

• Main Authors: SCHULTZ, Nathan E, HA, Heonjoo, WU, Tien Tsung, HOFFDAHL, Gerry A
• Format: Patent
• Language: English; French
• Published: 30.12.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING

A nonwoven fibrous web includes a flame retardant nonwoven fabric coated with a fire retardant, wherein the fire retardant comprises ammonium polyphosphate or alkali metal silicate; and wherein the flame retardant nonwoven fabric has a first major surface and an opposed second major surface; a first nonwoven fabric covering at least a portion of the first major surface; and a second nonwoven fabric covering at least a portion of the second major surface. The first and second nonwoven fabrics each comprise oxidized polyacrylonitrile fibers and optional reinforcing fibers. L'invention concerne une nappe fibreuse non tissée qui comprend un tissu non tissé retardateur de flamme revêtu d'un agent ignifuge, l'agent ignifuge comprenant un polyphosphate d'ammonium ou un silicate de métal alcalin ; et le tissu non tissé retardateur de flamme ayant une première surface principale et une seconde surface principale opposée ; un premier tissu non tissé recouvrant au moins une partie de la première surface principale ; et un second tissu non tissé recouvrant au moins une partie de la seconde surface principale. Les premier et second tissus non tissés comprennent chacun des fibres de polyacrylonitrile oxydé et des fibres de renfort facultatives.