METHOD FOR HYBRID DRY-JET GEL SPINNING AND FIBER PRODUCED BY THAT METHOD
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United States of America Patent
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Issued Date -
Apr 17, 2014
app pub date -
Oct 17, 2012
filing date -
Oct 17, 2012
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Abandoned
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Abstract
A method of spinning a polyacrylonitrile PAN-based precursor fiber comprises extruding a spinning solution of ultra-high molecular weight polyacrylonitrile polymer through a multi-filament spinnerette where the solution has a viscosity of between about 100 and about 300 Pa-sec (at a shear rate of 1 l/sec) at a dope extrusion temperature of between about 20° C. and about 26° C., producing a fiber having a diameter of between about 4 and about 10 micron, a tensile strength of between about 500 and about 1100 MPa, and an elastic modulus between about 13 and about 18 GPa.
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