Title:
PRODUCTION OF DRY SPUN HOLLOW POLYACRYLONITRILE FIBERS AND FILAMENTS
Document Type and Number:
Japanese Patent JPS588117
Kind Code:
A
Abstract:
Hollow polyacrylonitrile fibers having a uniform closed cavity structure are obtained by dry-spinning filament-forming acrylonitrile polymers from a solution through a spinning jet comprising annular jet bores of the type shown in FIG. 1, the solution having a viscosity of at least 120 falling-ball seconds, as measured at 80 DEG C. or of at least 75 falling-ball seconds, as measured at 100 DEG C., the ring of the annular jet bores consisting of three, preferably equally large, ring segments at a distance from one another of at most 0.2 mm, the surface area of the jet bores of the profile jet amounting to less than 0.2 mm2 and the side width of the ring segments amounting to at most 0.1 mm, the spinning air acting on the filaments transversely of the direction in which they are taken off relative to the center of the spinning jet.
Inventors:
URURITSUHI RAINEERU
TONI HERUBERUTSU
HERUMAN YOSEFU YUNGUFUERUDORUB
HANSU KAARU BURUGARUTSU
TONI HERUBERUTSU
HERUMAN YOSEFU YUNGUFUERUDORUB
HANSU KAARU BURUGARUTSU
Application Number:
JP11007282A
Publication Date:
January 18, 1983
Filing Date:
June 28, 1982
Export Citation:
Assignee:
BAYER AG
International Classes:
B01D71/40; B01D71/42; D01D5/24; D01F6/18; (IPC1-7): D01F6/18
Attorney, Agent or Firm:
Akira Uchida
Next Patent: SPINNING PROCESS FOR POLYAMIDE