Methods for making polylactic acid stereocomplex fibers
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United States of America Patent
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May 22, 2012
Grant Date -
Dec 9, 2010
app pub date -
Sep 26, 2008
filing date -
Sep 28, 2007
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Abstract
PLA stereocomplex fibers are made by separately melting a high-D PLA starting resin and a high-L starting resin, mixing the melts and spinning the molten mixture. Subsequent heat treatment introduces high-melting “stereocomplex” crystallinity into the fibers. The process can form fibers having a high content of “stereocomplex” crystallites that have a high melting temperature. As a result, the fibers have excellent thermal resistance. The process is also easily adaptable to commercial melt spinning operations.
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