TEXTILE YARN FOR MANUFACTURE OF ARTICLES TO BE USED FOR PROTECTING FROM OPEN FIRE Russian patent published in 2006 - IPC D02G3/04 

FIELD: textile yarn for manufacture of various comfortable fire-resistant articles.

SUBSTANCE: textile yarn contains twisted thermally oxidized polyacrylonitrile filaments or twisted thermally oxidized polyacrylonitrile filaments mixed with other filaments. Thermally oxidized polyacrylonitrile filaments have linear density of 0.11-0.5 tex, length of 40-90 mm, twist rate of 3-7 twists per 1 cm of length, and density of 1.37-1.43 g/cm³, and are mixed with animal or plant fibers, or with fire-resistant viscose, aramide, paraaramide, polyoxodiazole filaments, or mixture thereof. Share of twisted thermally oxidized polyacrylonitrile filaments in mixtures constitutes at least 25% by weight of yarn. Yarn may additionally comprise core of paraaramide or polyoxodiazole continuous thread.

EFFECT: improved operating characteristics, increased resistance to open fire, moisture and intermingling of filaments, reduced production cost and provision for manufacture of highly comfortable articles from yarn of such structure.

3 cl, 2 tbl