EP 0376625 B1 19960918 - Acrylic synthetic fiber and process for preparation thereof
Title (en)
Acrylic synthetic fiber and process for preparation thereof
Title (de)
Acrylfaser und Verfahren zur Herstellung
Title (fr)
Fibre acrylique et procédé pour sa fabrication
Publication
Application
Priority
- JP 2877389 A 19890209
- JP 3504089 A 19890216
- JP 32889188 A 19881228
Abstract (en)
[origin: EP0376625A2] An acrylic synthetic fiber having in the transverse section thereof many openings having an indeterminate shape and a size of 0.1 to 1.6 mu m, wherein in the interior of the fiber, each opening forms a vein-like or straw-like void extending substantially in parallel to the longitudinal axis of the fiber and having a length of at least 60 mu m. This acrylic fiber is prepared by a) dissolving in a suitable solvent an acrylic polymer comprising at least 60 weight% of an acrylonitrile unit and 5 to 20 weight %, based on the weight of the acrylic polymer, of a polyalkylene glycol having a number average molecular weight of 5,000 to 50,000, b) aging the formed spinning solution for at least 4 hours, and c) extruding the spinning solution into a coagulating medium. The acrylic fiber is useful, e.g., as a frictional material comprising (a) a pulpy material made from the acrylic fiber, (b) a resin and (c) a filler.
IPC 1-7
IPC 8 full level
D01D 5/247 (2006.01); D01F 6/54 (2006.01)
CPC (source: EP KR)
D01D 5/247 (2013.01 - EP); D01F 6/18 (2013.01 - KR); D01F 6/38 (2013.01 - KR); D01F 6/54 (2013.01 - EP)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
EP 0376625 A2 19900704; EP 0376625 A3 19910508; EP 0376625 B1 19960918; AU 4723089 A 19900705; AU 612918 B2 19910718; CA 2006493 A1 19900628; CA 2006493 C 19951128; DE 68927225 D1 19961024; DE 68927225 T2 19970220; KR 900010072 A 19900706; KR 920007107 B1 19920824
DOCDB simple family (application)
EP 89313416 A 19891221; AU 4723089 A 19891222; CA 2006493 A 19891222; DE 68927225 T 19891221; KR 890019900 A 19891228