FIELD: production of absorbing fibers. SUBSTANCE: invention presents a thermoplastic composition, from which they mould fibers, that are used as the one-shot absorbing product intended for sorption of liquids. The composition contains: 60-80 % of the aliphatic polyester picked out of a group, including poly (milk acid), polybutylene succinate or its copolymer with adipinate, copolymer of polyhydroxybutyrate with valerate, polycaprolactamam, their mixture and 20-40 % of polycarbone acid with a number of carbon atoms 3-30. On the basis of the indicated composition the fiber is molded using a method of an extrusion. The composition has better manufacturability, the smaller size of crystals, improved thermostability and biodecomposeability (fibers and nonwoven fabric based on the composition easily decompose in a circumambient. EFFECT: better manufacturability, thermostability, biodecomposeability, smaller size of crystals. 36 cl, 4 tbl, 2 ex _
