A filament type nano-sized long
fiber and a method of producing the same are disclosed. In the method, a
spinning solution or a
spinning melt is electro-spun in drops using a spinneret to which a
critical voltage is applied, and the spun drops are continuously collected on a multi-collector. The
spinning solution is produced by dissolving a blend or
copolymer consisting of two or more kinds of polymers in a
solvent. The spinning melt is produced by melting the polymers. The multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof. The filament type nano-sized long
fiber is processed into a
yarn through one step during the
electrospinning process, and thus, mechanical properties are better than those of a conventional
nanofiber non-
woven fabric. Consequently, the filament type nano-sized long
fiber can be utilized for the extended application.