FIELD: textile industry. SUBSTANCE: polyester fibers manufactured through shaping from solution are made up of fiber-forming polymer and 0.1-5.0 wt % of partially soluble in it polymethacrylic acid alkyl ester possessing less than 0.25 milli-Equ/g acidic and/or anhydride groups and imidization degree 50-90%, which has been prepared by interaction of polymethacrylic acid alkyl ester possessing C1-C6-alcohol groups with primary C1-C3-amine. EFFECT: fibers with new properties obtained. 16 cl, 4 tbl
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