Polyamide imide fiber, non-woven fabric composed of the fiber, process for manufacture of the non-woven fabric, and separator for electronic component

摘要

The present invention provides a fiber having a nano-order fiber diameter, which is produced by without a process of dehydration and cyclization by a heat treatment after fiber spinning and has excellent heat resistance and mechanical strength, and a non-woven fabric composed of the fiber, and discloses the polyamide-imide fiber and the non-woven fabric having an average fiber diameter of from 0.001 μm to 1 μm and also discloses the process for producing threrof. The present invention also provides a separator for an electronic component which has a high conductivity and a small separator thickness and is improved in safety during reflow soldering or short-circuiting, and discloses the separator composed of a non-woven fabric obtained by an electro-spinning method.

主权项

1. A non-woven fabric, comprising a polyamide-imide fiber having an average fiber diameter in the range of from 0.001 μm to 1 μm,
wherein the-polyamide-imide fiber comprises a polyamide-imide containing a  moiety or a  moiety, the polyamide-imide is obtained by using a catalyst selected from the group consisting of triethylamine, diethylenetriamine, 1,8-diazabicyclo[5,4,0]-7-undecene, sodium fluoride, potassium fluoride, cesium fluoride, and sodium methoxide, and the polyamide-imide has inherent viscosity of 0.86 dL/g or more.