FIELD: polymer materials.
SUBSTANCE: composition contains polyurethane-urea polymer and dialkyl sulfosuccinate of general formula: 
wherein R1 and R2, the same or different, represent C5-C10-alkyl group and M+ represents Li+, Na+, K+, or NH4+, and up to 20% target additives. Fiber is obtained using wet or dry method of formation from polymer solution followed by removal of solvent, drying, oiling, and reeling.
EFFECT: increased strength of fibers.
15 cl, 2 tbl, 3 ex
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