Insulating nonwoven fabric and method for manufacturing the same, insulating material

Provided are a nonwoven fabric mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. of 100 to 3000 Pa·s, and satisfying conditions of: 1) an average fiber diameter of 0.5 to 5 μm; 2) an air permeability of more than or equal to 20 seconds/100 mL; and 3) a withstand voltage...

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Bibliographische Detailangaben
1. Verfasser:	Shirotani, Yasuhiro
Format:	Patent
Sprache:	eng
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS TEXTILES TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	Provided are a nonwoven fabric mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. of 100 to 3000 Pa·s, and satisfying conditions of: 1) an average fiber diameter of 0.5 to 5 μm; 2) an air permeability of more than or equal to 20 seconds/100 mL; and 3) a withstand voltage of more than or equal to 15 kV/mm, an insulating material using the nonwoven fabric, and a method for manufacturing the nonwoven fabric including continuously treating fibers between a pair of rolls at a temperature of 150 to 300° C. and a linear pressure of 100 to 500 kg/cm.