Lyocell material for tobacco filter and method for preparing same

A method of manufacturing a lyocell material for a cigarette filter, comprising:

• (S1) spinning a lyocell spinning dope comprising a cellulose pulp and an N-methylmorpholine-N-oxide (NMMO) aqueous solution;
• (S2) coagulating the lyocell spinning dope spun in the step (S1), thus obtaining lyocell multifilaments;
• (S3) water-washing the lyocell multifilaments obtained in the step (S2);
• (S4) oil-treating the lyocell multifilaments water-washed in the step (S3);
• and
• (S5) crimping the lyocell multifilaments oil-treated in the step (S4) using a stuffer box, thus obtaining a crimped tow having 25-30 crimps per inch,
• wherein coagulating in the step (S2) comprises a primary coagulation using air quenching (Q/A) including supplying cold air at a temperature of 4-15° C. and a wind velocity of 5-50 m/s to the spinning dope and a secondary coagulation including immersing the primarily coagulated spinning dope in a coagulation solution,
• wherein the cold air is supplied outwardly from an air cooling part positioned inside a donut-shaped spinneret, and
• wherein the step (S5) is performed by the supplying steam having a pressure of 0.1-1.0 kgf/cm2 to an interior of the stuffer box and pressing the lyocell multifilaments using a press roller at a pressure of 1.5-2.0 kgf/cm2 to give the lyocell multifilaments having 25-30 crimps per inch.