METHOD OF RECEIVING OF THIN-FILAMENT CELLULOSE FILAMENT Russian patent published in 2009 - IPC D01D5/06 

FIELD: textile, paper.

SUBSTANCE: method is provided for receiving of cellulose filament, consisting of ultrafine filaments and used at manufacturing of filter fabric for filtration of blood and its components against white blood cells. According to the method it is implemented extrusion of spinning solution, stretch extraction of nascent yarn, post reduction, washing, drying and acceptance of filament. Extrusion is implemented at effluence rate of spinning solution 14.1 ÷ 19.0 m/min and extrusion 7.4 ÷ 39.0 % with receiving of filament, consisting of ultrafine filaments of linear density less than 0.039 tex. Squeezed after washing filaments with zero twist are formed into total tow of linear density 5.5 ÷ 7.2 ktex, it is dried up to humidity 20 ÷ 50% and is accepted in the form of flat tape into receiver tank. In the implementation version squeezed after washing single parallel oriented with zero twist are dried up to humidity 6 ÷ 19 %, it is formed into total tow of linear density 5.5 ÷ 7.2 ktex, it is embossed and accepted in the form of three-dimensional tow. Washing of filaments is implemented by countercurrent in three stages by soften water.

EFFECT: obtaining filament of linear density less than 0,039 tex, which can be used for formation of filter fabric with high performance attributes, providing increased effectiveness of blood cleaning up to 99,7%, and absence of filament twist provides simplification of its processing at manufacturing of filter fabric.

4 cl, 3 ex, 1 tbl