Spinning method and spinning device

Abstract

A nozzle device for spinning comprising a nozzle, a polymer solution supply means that supplies a polymer solution to the nozzle and ejects the polymer solution from the nozzle tip, and a solvent vapor supply means that supplies a gas containing vapor of the same solvent as the solvent of the polymer solution at least to the vicinity of the polymer solution just ejected, and a spinning method using the nozzle device for spinning. Solidification of a spinning solution is prevented at the nozzle tip from which the spinning solution is ejected.

1 . A nozzle device for spinning, comprising a nozzle, a polymer solution supply means for supplying a polymer solution to a nozzle to eject it from a nozzle tip, and a solvent vapor supply means for supplying a gas containing the vapor of the same solvent as a solvent of the polymer solution at least to the periphery of the polymer solution just ejected. 
     
     
         2 . The nozzle device for spinning according to  claim 1 , wherein the device has a double tubular structure part composed of an inner tube, the inner tube being a nozzle, and an outer tube surrounding it, and is configured such that a gas containing the vapor of the same solvent as the solvent of the polymer solution is supplied from a space between the inner tube and the outer tube. 
     
     
         3 . A method of spinning fibers containing a polymer, comprising a step of ejecting a polymer solution from a nozzle tip, wherein spinning is performed while supplying a gas containing the vapor of the same solvent as a solvent of the polymer solution at least to the periphery of the polymer solution just ejected. 
     
     
         4 . The spinning method according to  claim 3 , wherein the gas to be supplied contains a substance that is in a gaseous phase under the condition at the time of spinning, and is saturated with the vapor of the same solvent as the solvent of the polymer solution.