| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive method for producing a microfiber made of an ecological synthetic resin having improved heat resistance in stable qualities. Ž<P>SOLUTION: The sea-island fiber comprises a thermoplastic resin having biocompatibility as an island component obtained by blending a polylactic acid unit A composed of 70-99 mol% of an L-lactic acid unit and 1-30 mol% of a D-lactic acid unit and/or a copolymerizable component unit except lactic acid with a polylactic acid unit B composed of 70-99 mol% of a D-lactic acid unit and 1-30 mol% of an L-lactic acid unit and/or a copolymerizable component unit except lactic acid in the weight ratio of 10:90-90:10 and forming the blend to a stereocomplex crystal. The fiber comprises a microfiber bundle having an island-average fiber diameter after sea part dissolution of 10-1,000 nm. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
