| 摘要 |
PROBLEM TO BE SOLVED: To obtain a nonwoven fabric by providing the surface of constituent fibers with a porous layer consisting of microparticles of inorganic oxide and the like so as to fully manifest the function inherent in the microparticles, and to provide a method for producing the above nonwoven fabric. SOLUTION: This nonwoven fabric is obtained by providing the surface of constituent fibers 1 with a porous layer 10 consisting of microparticles of inorganic oxide and the like, more precisely, for example, the porous layer 10 is formed on the fiber surface according to the following procedure: a dispersion is first prepared using, as salute, secondary aggregate particles consisting of titanium oxide or zirconium oxide microparticles 1-100 nm in size and another kind of microparticles with >=70 wt.% thereof having a size of 10-800 nm and, as solvent, water, an organic solvent or a mixture thereof; subsequently, a nonwoven fabric is immersed in the above dispersion and then dried. This nonwoven fabric is usable as a filter or battery separator, exhibiting high performance in various applications. |
