FIELD: process engineering.
SUBSTANCE: fibre yarn is made up of multiple strands of elementary fibres. First, prior to cutting into staple fibres, fibre yarn is expanded in, at least, one expansion zone. Note hare that fibre yarn is treated by fluid medium. Then, after expansion, fibre yarn is subjected to thermal treatment for fixation. Note here that amount of fluid medium contained in fibre yarn before thermal treatment is reduced by squeezing out. Note also that fibre yarn inside expansion zone is squeezed out over its width so that weight fraction of fluid medium uniformly over said width makes less than 10%. Invention proposed also the device to this end.
EFFECT: power savings, higher-strength fibres.
20 cl, 5 dwg
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