The method for producing the polyimide non-woven fabric and

The present invention provides an environment exposed to high temperature applications, heat resistance, mechanical strength, thermal dimensional stability but also have a very large surface area, high filtration performance of nonwoven display. The nonwoven fabric of the present invention is a nonwoven fabric made from polyimide fibers, which polyimide is obtained by polycondensation of at least from an aromatic tetracarboxylic acid and an aromatic diamine having a benzoxazole structure polyamic imine, which is a fiber diameter of 0.001 ~ 1μm, the polyimide fiber obtained using the procedure described below, namely: obtained by polycondensation of at least an aromatic diamine and from an aromatic tetracarboxylic acid having a benzoxazole structure electro-spinning the polyamic acid and a step of forming step polyimide precursor group imidization of the polyimide precursor process nonwoven fabric.