Production of melt fused synthetic fibers using a spinneret
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United States of America Patent
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N/A
Issued Date -
Jan 30, 2003
app pub date -
Jul 12, 2002
filing date -
Jul 24, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process and apparatus for the production of polyacrylontrile (PAN) polymer fibers from a polyacrylonitrile polymer, wherein a polyacrylonitrile polymer that comprises 90 weight percent or more polyacrylonitrile, optionally mixed with from about 30 to about 50 weight percent, based on the weight of the polymer, of a fugitive plasticizer, is heated, provided to an extruder in liquid form, extruded to form polyacrylonitrile fibers, and the fibers, immediately after the extrusion, are cooled, preferably in an air-cooled manifold, to a temperature of from about 110 to about 135.degree. C. Fibers so produced have increased tensile strength, and thus are useful for more purposes, than typically produced polyacrylonitrile fibers.
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