Method for producing pitch-based carbon fiber silver and...

Details Method for producing pitch-based carbon fiber silver and... Method for producing pitch-based carbon fiber silver and...

2004-12-14

2009-12-22

Hurley, Shaun R (Department: 3765)

Textiles: fiber preparation

Assembling

Silver forming

Reexamination Certificate

active

07634840

ABSTRACT:
A pitch-based carbon fiber sliver providing a high-strength carbon fiber spun yarn is efficiently produced by providing a pitch-based carbon fiber mat comprising a mass of piled-up pitch-based carbon fibers of which fiber extension directions are aligned preferentially in one direction; and directly subjecting the carbon fiber mat to drawing and carding by means of a carding machine while moving the mat in said one preferential alignment direction. The thus-obtained carbon fiber sliver is drawn and twisted to produce a pitch-based carbon fiber spun yarn containing at least 3 wt. % of fibers having a fiber length of at least 150 mm, a number of primary twist of 50-400 turns/m and a tensile strength of at least 0.10 N/tex.

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patent: 08158170 (1996-06-01), None

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