| abstract |
(57) [Abstract] [Purpose] The main object of the present invention is to widen the allowable range of processing conditions to enable the setting of arbitrary spinning speed and centrifugal ratio, and to obtain a high-strength and high-strength fiber. .. [Structure] A thermoplastic resin comprising a homopolymer or a copolymer of hydroxyalkanoate is melt-spun by an extruder, preheated at, for example, 100 ° C. to 170 ° C., and then stretched. Production method. |