EP 0279687 B1 19960214 - Graphite fiber
Title (en)
Graphite fiber
Title (de)
Graphitfaser
Title (fr)
Fibre de graphite
Publication
Application
Priority
JP 3574387 A 19870220
Abstract (en)
[origin: EP0279687A2] A graphite fiber having an elastic modulus E of 340 - 680 GPa, a microvoid radius of not larger than 20 ANGSTROM and a crystal size Lc ( ANGSTROM ) satisfying the following formula: Lc<3> </= 0.918 x 10<3>E - 3 x 10<5> is valuable for a composite material having an improved compression strength. The graphite fiber is made preferably by oxidizing an acrylonitrile polymer precursor containing 0.05 - 8 wt.% of comonomer units and having an iodine adsorption amount of not larger than 3 wt.% and an orientation degree of at least 85%, at 200 - 300 DEG C in an oxidative atmosphere under tension to obtain an oxidized fiber having a water adsorption of not larger than 7 wt.% and an orientation degree of at least 78%, followed by carbonization and graphitization of the oxidized fiber under tension.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D01F 9/22 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0279687 A2 19880824; EP 0279687 A3 19910403; EP 0279687 B1 19960214; DE 3855003 D1 19960328; DE 3855003 T2 19960627; JP S63211326 A 19880902
DOCDB simple family (application)
EP 88301424 A 19880219; DE 3855003 T 19880219; JP 3574387 A 19870220