Process for making melt-spun spandex
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Oct 22, 1999
filing date -
Sep 3, 1997
priority date (Note) -
Expired
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Abstract
A process for melt-spinning solution-polymerized polyurethanes, based on polvether glycols and MDI at an addition ratio of 1.8 to 6.0, glycol chain extenders and a chain terminator to produce number average molecular weights of the polyurethanes of 40,000-150,000, and 5-2500 decitex spandex made thereby, are provided.
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