| 摘要 |
adding the ester-forming three functional compd. of formula (I) (where R1,R2,R3=-OH, -CO2H, or -R5OH (R5; alkyl group above C1)) with the amount of 0.1-0.5 mol% against the added aromatic carboxylic acid compn., and the nucleating agent of formula (II) (where M; alkali earth metal of valence 1, R1,R2; alkyl group above C12) with amount of 0.16-1.0 mol% against added aromatic carboxylic acid compn. to each polyetherester block copolymer composed of 10/90 - 30/70 of hard segment of aromatic polyester and soft segment of polyether to obtain elastic material; melt spinning and cooling-solidifying; and drawing with the range of 0.40X <= Y <= 0.70X (where X; breaking multiplying rate, Y; range of drawing ratio).
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