| abstract |
(57) [Summary] [Structure] A composite fiber comprising a polylactic acid polymer A having a melting point Ta and a polylactic acid polymer B. The polylactic acid polymer B has a melting point Tb lower than the melting point Ta by 10 ° C. or more, or is amorphous and has no melting point. [Effect] It has biodegradability and heat fusion property. It is suitable for producing fiber structures having various biodegradability. |