SPINNING SOLUTION COMPOSITION AND THREADS FORMED THEREFROM Russian patent published in 2000 - IPC

FIELD: polymer materials. SUBSTANCE: composition containing fully aromatic polyamide with homopolymer units of formula: [-(NH-C₆H₄-NHCO-C₆H₄-CO-)]; aliphatic polyamide consisting of polycaproamide or polyhexamethylenedipamide homopolymer units; and concentrated sulfuric acid is distinguished by that at least one of the above-mentioned polyamides is copolymer consisting of two aromatic or two aliphatic honopolymer units, said aromatic copolymer having general formula: , wherein u = 75-90 wt.% and w = 10-25 wt.%, and said aliphatic copolymer having general formula: [-(NH-(CH₂)₆-NHCO-(CH₂)₄-CO-)_n(-HN-(CH₂)₅-CO-)_m], wherein n = 50-95 wt.% and m = 5-50 wt. %, whereas spinning composition contains 16-19 wt.% of fully aromatic polyamide, 0.6-4.0 wt.% of aliphatic polyamide, and concentrated sulfuric acid forms the rest of composition. EFFECT: considerably strengthened threads and increased wear resistance. 7 cl, 1 tbl, 15 ex