FIELD: chemistry; technological processes.
SUBSTANCE: invention relates to chemical technology of producing biodegradable fibres and concerns modified polylactic acid fibres. Method of producing polylactic acid fibres involves mixing in a melt polylactic acid with polyepoxide modifier and a polymer reinforcing additive to form a thermoplastic composition, wherein reinforcing additive is dispersed in form of domains of discrete phase in a continuous polylactic acid phase; subsequent extrusion of thermoplastic composition at temperature higher than approximately 230 °C, which contributes to reaction of polyepoxide modifier with polylactic acid; and passing reacted composition through extrusion head to form fibre.
EFFECT: invention enables to obtain fibre with good mechanical properties, appearing during and after spinning from melt.
22 cl, 5 dwg, 10 tbl, 55 ex
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