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

摘要

A spinning nozzle which has a perforated part in which ejection holes have been arranged in a density as high as 600-1,200 holes/mm2. This process for producing a fibrous bundle comprises ejecting a spinning dope having a viscosity as measured at 50° C. of 30-200 P from the ejection holes of the spinning nozzle to produce a fibrous bundle. This fibrous bundle 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.

主权项

1. A spinning nozzle comprising a perforated part having a number of ejection holes per square mm of at least 600 holes/mm2 to no more than 1,200 holes/mm2.