| abstract |
PROBLEM TO BE SOLVED: To provide a nonwoven fabric and a method for producing the same, in which a porous layer made of fine particles of inorganic oxide or the like is formed on the surface of a fiber so that the function inherent in the fine particles can be sufficiently exhibited. . This nonwoven fabric can be used as a filter or a battery separator, and can exhibit high performance in various uses. SOLUTION: A porous layer made of fine particles such as an inorganic oxide is formed on the surface of a fiber constituting a nonwoven fabric. For example, titanium oxide or zirconium oxide fine particles having a diameter of 1 to 100 nm and secondary aggregated particles of the fine particles having 70% or more having a diameter of 10 to 800 nm are solutes, and water, an organic solvent or water and an organic solvent are used as solutes. Producing a dispersion using the phase solution as a solvent, immersing the nonwoven fabric in this dispersion, drying, A porous layer is formed on the fiber surface. |