EP 0374925 B1 19950308 - High density graphite fiber and method of manufacture thereof.
Title (en)
High density graphite fiber and method of manufacture thereof.
Title (de)
Graphitfaser mit hoher Dichte und Verfahren zu deren Herstellung.
Title (fr)
Fibre de graphite à haute densité et méthode pour sa production.
Publication
Application
Priority
JP 32439788 A 19881222
Abstract (en)
[origin: EP0374925A2] A graphite fiber derived from an acrylic fiber having a fiber density of not less than 1.93 g/cm<3>, a strand tensile strength of not less than 350 kgf/mm<2>, and a strand tensile modulus of not less than 53x10<3> kgf/mm<2>, and a method for producing the grpahite fiber by carbonizing a preoxidized fiber derived from an acrylic fiber and having a fiber density of from 1.32 to 1.40 g/cm<3> to obtain a carbon fiber having a nitrogen content of not less than 1.0% by weight based on the carbon fiber weight, a fiber density of not less than 1.79 g/cm<3> and an orientation of not less than 79% at a maximum diffraction at 2 theta =25.3+/-0.5 DEG in X-ray diffraction angle of the (002) plane of the graphite crystal, and graphitizing the thus-obtained carbon fiber in an inert gas at a temperature of not lower than 2,400 DEG C and under a tension to stretch the fiber at least 3% during the graphitization.
IPC 1-7
IPC 8 full level
D01F 9/22 (2006.01)
CPC (source: EP)
D01F 9/22 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0374925 A2 19900627; EP 0374925 A3 19910925; EP 0374925 B1 19950308; DE 68921581 D1 19950413; DE 68921581 T2 19950817
DOCDB simple family (application)
EP 89123668 A 19891221; DE 68921581 T 19891221