EP 0372622 A2 19900613 - Acrylic precursor for carbon fibres and method for its preparation.
Title (en)
Acrylic precursor for carbon fibres and method for its preparation.
Title (de)
Acrylvorläufer für Kohlenstoffasern und Verfahren zur Herstellung derselben.
Title (fr)
Précurseur acrylique pour fibres de carbone et son procédé de fabrication.
Publication
Application
Priority
IT 2283688 A 19881202
Abstract (en)
A method for preparing acrylic precursors with improved characteristics suitable for transformation into carbon fibres of superior mechanical characteristics comprises wet-spinning an acrylic polymer dissolved in dimethylacetamide followed by coagulation in a solvent-non solvent binary mixture bath of rigorously controlled composition and temperature, and a series of controlled-condition stretching operations with interposed washing stages, followed by yarn drying before its final collection. The method is characterised essentially by its coagulation stage, which is conducted under such rigorously controlled bath temperature and composition conditions as to obtain at the end of the process an acrylic yarn which has a perfectly compact structure practically free of flaws (voids), a perfectly circular cross-section and mechanical characteristics which are distinctly better than those of acrylic yarns of identical composition obtained by spinning processes of the known art. The specific destination of the acrylic yarn is the production of high-performance carbon fibres.
IPC 1-7
IPC 8 full level
D01D 5/06 (2006.01); D01F 6/18 (2006.01); D01F 6/38 (2006.01)
CPC (source: EP KR)
D01D 5/06 (2013.01 - EP); D01F 6/18 (2013.01 - EP KR); D01F 6/38 (2013.01 - EP); D01F 9/08 (2013.01 - KR)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR LI LU NL SE
DOCDB simple family (publication)
EP 0372622 A2 19900613; EP 0372622 A3 19910410; EP 0372622 B1 19950412; AT E121146 T1 19950415; DE 68922190 D1 19950518; DE 68922190 T2 19950907; ES 2070897 T3 19950616; IL 92521 A0 19900831; IL 92521 A 19920818; IT 1227677 B 19910423; IT 8822836 A0 19881202; KR 900010088 A 19900706; KR 920007111 B1 19920824
DOCDB simple family (application)
EP 89203017 A 19891128; AT 89203017 T 19891128; DE 68922190 T 19891128; ES 89203017 T 19891128; IL 9252189 A 19891201; IT 2283688 A 19881202; KR 890017954 A 19891202