| abstract |
An aramid fiber nonwoven fabric that can be suitably used for a battery or capacitor separator and a method for producing the same. A nonwoven fabric composed of aramid fibers, wherein the average fiber diameter of the aramid fibers is 0.1 to 3000 μm, the basis weight of the nonwoven fabric is 3 to 1000 g / m 2 , and the thickness is 1 to 100 μm. Aramid fiber nonwoven fabric characterized by having a maximum tensile strength in at least one direction of the nonwoven fabric of 1 to 50 N / cm and a shrinkage rate at 250 ° C. of 3% or less. Moreover, the web which consists of an aramid fiber whose average fiber diameter is 0.1-3000 micrometers is pre-heated with the calender roll at the temperature of 100-200 degreeC, Furthermore, it heats, 1.1-5.0 times The nonwoven fabric is stretched in one direction and has a basis weight of 3 to 1000 g / m 2 and a thickness of 1 to 100 μm. [Selection figure] None |