META-ARAMID-BASED FILM WITH IMPROVED ELECTRICAL INSULATING AND STRENGTH BY OPTIMIZING THE RATIO OF A FIBRID AND A FLOC AND THE FREENESS OF THE FIBRID, THEREBY IMPROVING BOTH ELECTRICAL INSULATING AND STRENGTH

摘要

PURPOSE: A meta-aramid-based film is provided to improve strength and dehydration without the loss of electrical insulating performance, and to have excellent electrical insulating performance and mechanical strength.;CONSTITUTION: A meta-aramid-based film includes a raw sheet (100) which contains meta-aramid fibrids and flocs with a weight ratio of 1:9-3:7. The Canadian standard freeness of the fibrid is 100 ml or less. The film includes a surface layer (210) and a backside layer (230) formed on both sides of the fibrid. The surface layer and the backside layer are formed by an electrospinning. The thickness ratio of the surface layer, the raw sheet, and the back side layer is 1:40-60:1. The film is manufactured by a calendering at 270-290 °C.;COPYRIGHT KIPO 2013