SPINNING NOZZLE, PROCESS FOR PRODUCING FIBROUS MASS, FIBROUS MASS, AND PAPER

摘要

A spinning nozzle (1) which has a perforated part (2) in which ejection holes (3) have been arranged in a density as high as 600-1,200 holes/mm2. This process for producing a fibrous mass comprises ejecting a spinning dope having a viscosity as measured at 50ºC of 30-200 P from the ejection holes (3) of the spinning nozzle (1) to produce a fibrous mass. This fibrous mass has a single-fiber fineness of 0.005-0.01 dtex. By the wet-process direct spinning, a mass of nanofibers which are stably uniform and continuous can be produced at a high efficiency.