FIBRES BASED ON POLYCAPROLACTAM,METHOD OF PRODUCING THESE FIBRES AND USING FOR MANUFACTURING OF YARN AND NONWEAVED MATERIALS,SUCH MATERIALS

摘要

0-3.0, METHOD OF PREPARING THE SAME, FIBERS AND FLAT PRODUCTS MADE FROM SAID FILAMENTS. FIELD: synthetic fibers and products therefrom. SUBSTANCE: filaments with relative viscosity of 2.0-3.0 measured at concentration of 1 g filaments per 100 ml of 96 wt.-%-sulphuric acid at temperature of 25 C, produced by extrusion and removal rate calculated in accordance with equation [3600-1250x(3.0-relative viscosity)] m/min. Polycaprolactam is produced in presence of at least one dicarboxylic acid selected from group consisting of alkanedicarboxylic acids with 4-10 carbon atoms, cycloalkanedicarboxylic acids with 5-8 carbon atoms, benzene- and naphthalenedicarboxylic acid with non-continuous acid groups which may have one or two sulphoacid groups, amine-N-alkyl-C-C-N,N-di(alkanecarboxylic acid with 1-10 carbon atoms). Filaments with above-mentioned parameters are produced by extruding molten polycaprolactam produced in presence of at least one dicarboxylic acid selected from above-mentioned group through a spinneret to thereby obtain polycaprolactam fibers, by cooling fibers thus-extruded, and by removing fibers thus-cooled at minimum rate equal to [3600-1250x(3.0-relative viscosity)] m/min. EFFECT: higher operational properties.