Method of producing an amorphous polyetherimide fiber and heat-resistant fabric
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United States of America Patent
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Dec 13, 2016
Grant Date -
Mar 12, 2015
app pub date -
Nov 12, 2014
filing date -
Mar 26, 2009
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Abstract
Provided are an amorphous polyetherimide fiber having not only a small single fiber fineness suitable for producing fabrics, and a fabric comprising the amorphous polyetherimide fiber. The fiber comprises an amorphous polyetherimide polymer having a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, and a single fiber fineness of 3.0 dtex or less. The fiber may have a tenacity at room temperature of 2.0 cN/dtex or greater.
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