FIELD: chemistry.
SUBSTANCE: invention relates to a method for the production of fiber containing polyesterketonketone. A method is proposed that contains stages of mixing polyesterketonketone and sulfuric acid having a concentration of at least 98 wt.% to obtain a spinning “syrup”, and passing this spinning “syrup” through a spinneret into a coagulation bath. Polyesterketonketone is dissolved in sulfuric acid to a concentration of 18-21 wt.%.
EFFECT: exclusion of the decomposition of polyesterketonketone when heated, as well as an increase in the relative elongation of polyesterketonketone fiber at break, with a simultaneous increase in its specific strength; in addition, the claimed invention makes it possible to reduce the linear density of continuous elementary fibers and reduce their diameter.
20 cl, 2 dwg, 6 tbl, 6 ex
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