Methods for making polylactic acid stereocomplex fibers
US8182725B2 · kind B2 · utility
4Cited by
5References
25Claims
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Key dates
| Filing date | Sep 26, 2008 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Jan 13, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/92
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.