METHOD OF LINEN ROVING PREPARING FOR WET SPINNING Russian patent published in 1994 - IPC

FIELD: textile industry. SUBSTANCE: air-dried roving is worked with aqueous solution of sodium tripolyphosphate at concentration 0.3-0.6 g/l and prevocel at concentration 0.2-0.3 g/l at 60-65 C for 15 min following by cooking at 93-95 C for 10-20 C. Cooking is carried out in solution containing, g/l: ash soda 18-24; alkali 3.8-4.4, and sodium sulfite 6-15. Cooking is continued at 93-95 C for 1-2 h followed by washing with aqueous solution of sodium tripolyphosphate at concentration 0.3-0.5 g/l at 65-70 C for 15 min and neutralization with acetic acid solution at 40 C. EFFECT: improved method of linen roving preparing. 2 tbl