POLYURETHANE ELASTIC FIBERS
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United States of America Patent
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Issued Date -
Jul 22, 2010
app pub date -
Jun 11, 2008
filing date -
Jun 12, 2007
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Abandoned
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Abstract
An object of the present invention is to provide polyurethane elastic fibers that, when dyed with acidic dyes, exhibit a deep dyeing property and high fastness equivalent to those of polyamide fibers used as a companion material in mixed knitted and woven fabrics, while also exhibiting excellent spinning stability.straight-chain or branched alkyl group), have a Blue L value of 20-50 after laundering according to JIS L0844 A2 for dyeing of a single-loop tube-knit fabric with a specific blue acidic dye, and have a staining degree of grade 3.5 or greater on nylon fabrics.
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