| 摘要 |
PROBLEM TO BE SOLVED: To provide a fiber assembly of nanofiber which is formed by direct spinning by means of a wet spinning system of discharging a low-viscosity spinning raw liquid from discharge holes of an ultrahigh-density porous nozzle directly into a coagulating liquid and paper containing the fiber assembly.SOLUTION: A fiber assembly of a nanofiber is obtained by using a spinning nozzle 1 having a perforated part 2 in which discharge holes 3 are arranged in a high density of 600-1,200 holes/mmand discharging a spinning raw liquid of a viscosity at 50°C of 30-200 poises from the spinning nozzle to form a fiber assembly of a single fiber fineness of 0.005-0.01 dtex. Paper which is produced from the fiber assembly is thin with a basis weight of 3-5 g/mand has a high tensile strength of 3.0-13.5 N/mmin the length direction with the paper width of 15 mm and an air impermeability of 0.1-1.0 s. |
