FIELD: filter materials.
SUBSTANCE: invention relates to a method for producing a bicomponent core-shell multifilament for a woven material filter for the extraction of palatable beverages, which includes forming an undrawn thread by removing the core component from homopolyethylene terephthalate as a homopolyester and "shell" component of copolyethylene terephthalate, in which more than 20 mole percent of isophthalic acid is copolymerized, as a copolyester from a spinneret at a moulding temperature of 290 to 300°C, drawing the undrawn thread 3-4 times at the spinning speed immediately after spinning without winding it, and winding a multifilament in which the number of filaments is from 2 to 5, with a spinning speed from 3200 to 4000 m/min.
EFFECT: providing a method for producing filament for woven material to produce a filter with excellent extraction ability.
1 cl, 3 tbl, 9 ex
