EP 0145917 A3 19850925 - PROCESS FOR THE PREPARATION OF HIGH-DENSITY POLYACRYLONITRILE FIBRES
Title (en)
PROCESS FOR THE PREPARATION OF HIGH-DENSITY POLYACRYLONITRILE FIBRES
Publication
Application
Priority
DE 3341277 A 19831115
Abstract (en)
[origin: EP0145917A2] 1. A process for the production of polyacrylonitrile filaments having a density >= 1.220 g/cm**3 from polymers containing at least 85% by weight of acrylonitrile units by dry spinning a spinning solution, optionally washing the spun filaments and subsequently drawing and heating the filaments, wherein a) hydroxylamine or a hydroxylamine salt and an amine are added to the spinning solution b) drawing is carried out in a ratio of 1:4 to 1:12, and c) the drawn material is exposed to a contact heat of from 150 to 300 degrees C, preferably from 160 to 220 degrees C, for at least 100 seconds on hot contact surfaces.
IPC 1-7
IPC 8 full level
D01F 6/18 (2006.01); D02J 1/22 (2006.01); D02J 13/00 (2006.01)
CPC (source: EP)
D01F 6/18 (2013.01)
Citation (search report)
- [X] DE 2158798 A1 19720629 - KANEGAFUCHI SPINNING CO LTD
- [A] FR 2069071 A5 19710903 - ROLLS ROYCE
- [A] CHEMICAL ABSTRACTS, Band 69, Nr. 19, 4. November 1968, Seite 7348, Nr. 78386z, Columbus, Ohio, US; & JP-Y1-43 000 552 (RAYON CO., LTD.) 11.01.1968
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0145917 A2 19850626; EP 0145917 A3 19850925; EP 0145917 B1 19880420; DE 3341277 A1 19850523; DE 3470574 D1 19880526; JP S60119214 A 19850626
DOCDB simple family (application)
EP 84113236 A 19841103; DE 3341277 A 19831115; DE 3470574 T 19841103; JP 23687184 A 19841112