EP 0051189 B2 19900704 - DRY-SPUN POLYACRYLONITRILE FILAMENTS AND FIBRES WITH A SHAPED CROSS-SECTION, AND PROCESS FOR MANUFACTURING THEM
Title (en)
DRY-SPUN POLYACRYLONITRILE FILAMENTS AND FIBRES WITH A SHAPED CROSS-SECTION, AND PROCESS FOR MANUFACTURING THEM
Publication
Application
Priority
DE 3040970 A 19801030
Abstract (en)
[origin: US4810448A] A process for the production of acrylonitrile fibers and filaments having a precise cross-sectional profile in which filament-forming synthetic polymers are dry-spun from a solution having a viscosity of at least 120 falling bass seconds, measured at 80 DEG C., or a viscosity of at least 75 falling ball seconds, measured at 100 DEG C. Such solution is dry-spun through one or more nozzles. The nozzle hole are of the profile nozzles being less than 0.2 mm2 and the lateral width being less than 0.17 mm.
IPC 1-7
IPC 8 full level
D01D 5/04 (2006.01); D01D 5/253 (2006.01); D01F 6/18 (2006.01); D01F 6/38 (2006.01)
CPC (source: EP US)
D01D 5/253 (2013.01 - EP US); D01F 6/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0051189 A1 19820512; EP 0051189 B1 19850807; EP 0051189 B2 19900704; DE 3040970 A1 19820603; DE 3171719 D1 19850912; JP H0214443 B2 19900409; JP S57106713 A 19820702; US 4810448 A 19890307
DOCDB simple family (application)
EP 81108416 A 19811016; DE 3040970 A 19801030; DE 3171719 T 19811016; JP 17314481 A 19811030; US 4189087 A 19870422