Colorant Removal from Polymeric Fibers
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United States of America Patent
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Issued Date -
Apr 6, 2006
app pub date -
Sep 27, 2004
filing date -
Sep 27, 2004
priority date (Note) -
Abandoned
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Abstract
Novel organic compositions for removing dyes from the surface of polymeric fibers are disclosed. The method for dye removal from the surface of fibers includes contacting the fibers with a non-aqueous ester stripping composition preferably containing at least one cyclic ester and optionally containing a surfactant, an alcohol, or both. The process of the present invention is especially useful for removing color from dyed polyamide fibers as part of a recycling process for such materials.
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