Polycarbonate sizing finish and method of application thereof
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United States of America Patent
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Nov 22, 1983
Grant Date -
N/A
app pub date -
Sep 23, 1982
filing date -
Sep 23, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved polycarbonate sizing finish is provided comprised of a polycarbonate dissolved in a solvent mixture comprising N-methyl-2-pyrrolidone (NMP) and an alcohol having from 1 to 4 carbon atoms. The use of such a solvent mixture enables a relatively constant concentration of polycarbonate to be maintained, and consequently, enables a sized product fiber to be provided having a substantially uniform polycarbonate concentration thereon. In addition, the solvent may be readily and substantially completely removed from the sized fiber.
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