FIELD: reinforced articles production. SUBSTANCE: high-strength filaments suitable for use in preparing reinforced plastics, reinforced industrial rubber articles, conveyor belts, high-strength twisted sewing threads, etc. are manufactured from a spinning solution containing (i) a random aromatic copolyamide having the structure 1 or 2 where l=1-9.5, m=1-99, n is a number up to 98, NH is amino group in position 5 or 6 of the benzimidazole cycle, (ii) an alifatic polyamide having the structure 3 or 4 or their random polyamide at a weight alifatic polyamide to aromatic polyamide ratio ranging from 2: 98 to 20:80. The content of the polyamide component in the overall mixture is 11-22 wt %. EFFECT: new spinning solution proposed. 2 tbl
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